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244ffee7 | 1 | /* ELF executable support for BFD. |
b9d5cdf0 | 2 | Copyright 1991, 1992, 1993, 1994 Free Software Foundation, Inc. |
244ffee7 JK |
3 | |
4 | Written by Fred Fish @ Cygnus Support, from information published | |
5 | in "UNIX System V Release 4, Programmers Guide: ANSI C and | |
6 | Programming Support Tools". Sufficient support for gdb. | |
7 | ||
8 | Rewritten by Mark Eichin @ Cygnus Support, from information | |
9 | published in "System V Application Binary Interface", chapters 4 | |
10 | and 5, as well as the various "Processor Supplement" documents | |
11 | derived from it. Added support for assembler and other object file | |
12 | utilities. Further work done by Ken Raeburn (Cygnus Support), Michael | |
13 | Meissner (Open Software Foundation), and Peter Hoogenboom (University | |
14 | of Utah) to finish and extend this. | |
15 | ||
16 | This file is part of BFD, the Binary File Descriptor library. | |
17 | ||
18 | This program is free software; you can redistribute it and/or modify | |
19 | it under the terms of the GNU General Public License as published by | |
20 | the Free Software Foundation; either version 2 of the License, or | |
21 | (at your option) any later version. | |
22 | ||
23 | This program is distributed in the hope that it will be useful, | |
24 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
25 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
26 | GNU General Public License for more details. | |
27 | ||
28 | You should have received a copy of the GNU General Public License | |
29 | along with this program; if not, write to the Free Software | |
30 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
31 | ||
244ffee7 JK |
32 | /* Problems and other issues to resolve. |
33 | ||
34 | (1) BFD expects there to be some fixed number of "sections" in | |
35 | the object file. I.E. there is a "section_count" variable in the | |
36 | bfd structure which contains the number of sections. However, ELF | |
37 | supports multiple "views" of a file. In particular, with current | |
38 | implementations, executable files typically have two tables, a | |
39 | program header table and a section header table, both of which | |
40 | partition the executable. | |
41 | ||
42 | In ELF-speak, the "linking view" of the file uses the section header | |
43 | table to access "sections" within the file, and the "execution view" | |
44 | uses the program header table to access "segments" within the file. | |
45 | "Segments" typically may contain all the data from one or more | |
46 | "sections". | |
47 | ||
48 | Note that the section header table is optional in ELF executables, | |
49 | but it is this information that is most useful to gdb. If the | |
50 | section header table is missing, then gdb should probably try | |
51 | to make do with the program header table. (FIXME) | |
52 | ||
6a3eb9b6 KR |
53 | (2) The code in this file is compiled twice, once in 32-bit mode and |
54 | once in 64-bit mode. More of it should be made size-independent | |
55 | and moved into elf.c. | |
56 | ||
d24928c0 KR |
57 | (3) ELF section symbols are handled rather sloppily now. This should |
58 | be cleaned up, and ELF section symbols reconciled with BFD section | |
59 | symbols. | |
5546cc7e KR |
60 | |
61 | (4) We need a published spec for 64-bit ELF. We've got some stuff here | |
62 | that we're using for SPARC V9 64-bit chips, but don't assume that | |
63 | it's cast in stone. | |
d24928c0 | 64 | */ |
244ffee7 JK |
65 | |
66 | #include <string.h> /* For strrchr and friends */ | |
67 | #include "bfd.h" | |
68 | #include "sysdep.h" | |
6ec3bb6a | 69 | #include "bfdlink.h" |
244ffee7 JK |
70 | #include "libbfd.h" |
71 | #include "libelf.h" | |
72 | ||
32090b8e | 73 | /* Renaming structures, typedefs, macros and functions to be size-specific. */ |
244ffee7 | 74 | #define Elf_External_Ehdr NAME(Elf,External_Ehdr) |
244ffee7 | 75 | #define Elf_External_Sym NAME(Elf,External_Sym) |
244ffee7 | 76 | #define Elf_External_Shdr NAME(Elf,External_Shdr) |
244ffee7 | 77 | #define Elf_External_Phdr NAME(Elf,External_Phdr) |
244ffee7 JK |
78 | #define Elf_External_Rel NAME(Elf,External_Rel) |
79 | #define Elf_External_Rela NAME(Elf,External_Rela) | |
013dec1a | 80 | #define Elf_External_Dyn NAME(Elf,External_Dyn) |
244ffee7 | 81 | |
244ffee7 JK |
82 | #define elf_core_file_failing_command NAME(bfd_elf,core_file_failing_command) |
83 | #define elf_core_file_failing_signal NAME(bfd_elf,core_file_failing_signal) | |
cb71adf1 PS |
84 | #define elf_core_file_matches_executable_p \ |
85 | NAME(bfd_elf,core_file_matches_executable_p) | |
244ffee7 JK |
86 | #define elf_object_p NAME(bfd_elf,object_p) |
87 | #define elf_core_file_p NAME(bfd_elf,core_file_p) | |
244ffee7 | 88 | #define elf_get_symtab_upper_bound NAME(bfd_elf,get_symtab_upper_bound) |
cb71adf1 PS |
89 | #define elf_get_dynamic_symtab_upper_bound \ |
90 | NAME(bfd_elf,get_dynamic_symtab_upper_bound) | |
013dec1a ILT |
91 | #define elf_swap_reloc_in NAME(bfd_elf,swap_reloc_in) |
92 | #define elf_swap_reloca_in NAME(bfd_elf,swap_reloca_in) | |
93 | #define elf_swap_reloc_out NAME(bfd_elf,swap_reloc_out) | |
94 | #define elf_swap_reloca_out NAME(bfd_elf,swap_reloca_out) | |
71edd06d ILT |
95 | #define elf_swap_symbol_in NAME(bfd_elf,swap_symbol_in) |
96 | #define elf_swap_symbol_out NAME(bfd_elf,swap_symbol_out) | |
013dec1a ILT |
97 | #define elf_swap_dyn_in NAME(bfd_elf,swap_dyn_in) |
98 | #define elf_swap_dyn_out NAME(bfd_elf,swap_dyn_out) | |
244ffee7 JK |
99 | #define elf_get_reloc_upper_bound NAME(bfd_elf,get_reloc_upper_bound) |
100 | #define elf_canonicalize_reloc NAME(bfd_elf,canonicalize_reloc) | |
101 | #define elf_get_symtab NAME(bfd_elf,get_symtab) | |
cb71adf1 PS |
102 | #define elf_canonicalize_dynamic_symtab \ |
103 | NAME(bfd_elf,canonicalize_dynamic_symtab) | |
244ffee7 JK |
104 | #define elf_make_empty_symbol NAME(bfd_elf,make_empty_symbol) |
105 | #define elf_get_symbol_info NAME(bfd_elf,get_symbol_info) | |
244ffee7 JK |
106 | #define elf_get_lineno NAME(bfd_elf,get_lineno) |
107 | #define elf_set_arch_mach NAME(bfd_elf,set_arch_mach) | |
108 | #define elf_find_nearest_line NAME(bfd_elf,find_nearest_line) | |
109 | #define elf_sizeof_headers NAME(bfd_elf,sizeof_headers) | |
110 | #define elf_set_section_contents NAME(bfd_elf,set_section_contents) | |
111 | #define elf_no_info_to_howto NAME(bfd_elf,no_info_to_howto) | |
112 | #define elf_no_info_to_howto_rel NAME(bfd_elf,no_info_to_howto_rel) | |
fce36137 | 113 | #define elf_new_section_hook NAME(bfd_elf,new_section_hook) |
32090b8e | 114 | #define write_relocs NAME(bfd_elf,_write_relocs) |
f035cc47 | 115 | #define elf_find_section NAME(bfd_elf,find_section) |
6ec3bb6a | 116 | #define elf_bfd_link_add_symbols NAME(bfd_elf,bfd_link_add_symbols) |
013dec1a | 117 | #define elf_add_dynamic_entry NAME(bfd_elf,add_dynamic_entry) |
374d2ef9 ILT |
118 | #define elf_link_create_dynamic_sections \ |
119 | NAME(bfd_elf,link_create_dynamic_sections) | |
120 | #define elf_link_record_dynamic_symbol \ | |
121 | NAME(bfd_elf,link_record_dynamic_symbol) | |
6ec3bb6a | 122 | #define elf_bfd_final_link NAME(bfd_elf,bfd_final_link) |
244ffee7 | 123 | |
6a3eb9b6 KR |
124 | #if ARCH_SIZE == 64 |
125 | #define ELF_R_INFO(X,Y) ELF64_R_INFO(X,Y) | |
126 | #define ELF_R_SYM(X) ELF64_R_SYM(X) | |
6ec3bb6a | 127 | #define ELF_R_TYPE(X) ELF64_R_TYPE(X) |
32090b8e | 128 | #define ELFCLASS ELFCLASS64 |
f035cc47 | 129 | #define FILE_ALIGN 8 |
013dec1a | 130 | #define LOG_FILE_ALIGN 3 |
6a3eb9b6 KR |
131 | #endif |
132 | #if ARCH_SIZE == 32 | |
133 | #define ELF_R_INFO(X,Y) ELF32_R_INFO(X,Y) | |
134 | #define ELF_R_SYM(X) ELF32_R_SYM(X) | |
6ec3bb6a | 135 | #define ELF_R_TYPE(X) ELF32_R_TYPE(X) |
32090b8e | 136 | #define ELFCLASS ELFCLASS32 |
f035cc47 | 137 | #define FILE_ALIGN 4 |
013dec1a | 138 | #define LOG_FILE_ALIGN 2 |
244ffee7 JK |
139 | #endif |
140 | ||
244ffee7 JK |
141 | /* Forward declarations of static functions */ |
142 | ||
6ec3bb6a ILT |
143 | static unsigned long bfd_add_to_strtab |
144 | PARAMS ((bfd *, struct strtab *, const char *)); | |
2e03ce18 | 145 | static asection *section_from_elf_index PARAMS ((bfd *, unsigned int)); |
244ffee7 JK |
146 | |
147 | static int elf_section_from_bfd_section PARAMS ((bfd *, struct sec *)); | |
148 | ||
cb71adf1 | 149 | static long elf_slurp_symbol_table PARAMS ((bfd *, asymbol **, boolean)); |
244ffee7 | 150 | |
ea617174 ILT |
151 | static boolean elf_slurp_reloc_table PARAMS ((bfd *, asection *, asymbol **)); |
152 | ||
244ffee7 | 153 | static int elf_symbol_from_bfd_symbol PARAMS ((bfd *, |
1c6042ee | 154 | struct symbol_cache_entry **)); |
244ffee7 | 155 | |
6ec3bb6a ILT |
156 | static boolean elf_compute_section_file_positions |
157 | PARAMS ((bfd *, struct bfd_link_info *)); | |
158 | static boolean prep_headers PARAMS ((bfd *)); | |
fa15568a | 159 | static void elf_fake_sections PARAMS ((bfd *, asection *, PTR)); |
6ec3bb6a | 160 | static boolean assign_section_numbers PARAMS ((bfd *)); |
013dec1a ILT |
161 | static file_ptr align_file_position PARAMS ((file_ptr)); |
162 | static file_ptr assign_file_position_for_section | |
163 | PARAMS ((Elf_Internal_Shdr *, file_ptr, boolean)); | |
6ec3bb6a | 164 | static boolean assign_file_positions_except_relocs PARAMS ((bfd *, boolean)); |
013dec1a ILT |
165 | static void assign_file_positions_for_relocs PARAMS ((bfd *)); |
166 | static bfd_size_type get_program_header_size PARAMS ((bfd *)); | |
167 | static file_ptr map_program_segments | |
168 | PARAMS ((bfd *, file_ptr, Elf_Internal_Shdr *, bfd_size_type)); | |
6ec3bb6a | 169 | |
9783e04a | 170 | static boolean elf_map_symbols PARAMS ((bfd *)); |
b9d5cdf0 | 171 | static boolean swap_out_syms PARAMS ((bfd *)); |
244ffee7 | 172 | |
2e03ce18 ILT |
173 | static boolean bfd_section_from_shdr PARAMS ((bfd *, unsigned int shindex)); |
174 | ||
6a3eb9b6 KR |
175 | #ifdef DEBUG |
176 | static void elf_debug_section PARAMS ((char *, int, Elf_Internal_Shdr *)); | |
177 | static void elf_debug_file PARAMS ((Elf_Internal_Ehdr *)); | |
178 | #endif | |
238ac6ec | 179 | |
32090b8e KR |
180 | #define elf_string_from_elf_strtab(abfd,strindex) \ |
181 | elf_string_from_elf_section(abfd,elf_elfheader(abfd)->e_shstrndx,strindex) | |
32090b8e | 182 | \f |
1c6042ee | 183 | |
32090b8e KR |
184 | /* Structure swapping routines */ |
185 | ||
6a3eb9b6 KR |
186 | /* Should perhaps use put_offset, put_word, etc. For now, the two versions |
187 | can be handled by explicitly specifying 32 bits or "the long type". */ | |
238ac6ec KR |
188 | #if ARCH_SIZE == 64 |
189 | #define put_word bfd_h_put_64 | |
190 | #define get_word bfd_h_get_64 | |
191 | #endif | |
192 | #if ARCH_SIZE == 32 | |
193 | #define put_word bfd_h_put_32 | |
194 | #define get_word bfd_h_get_32 | |
195 | #endif | |
196 | ||
244ffee7 JK |
197 | /* Translate an ELF symbol in external format into an ELF symbol in internal |
198 | format. */ | |
199 | ||
71edd06d | 200 | void |
1c6042ee ILT |
201 | elf_swap_symbol_in (abfd, src, dst) |
202 | bfd *abfd; | |
203 | Elf_External_Sym *src; | |
204 | Elf_Internal_Sym *dst; | |
244ffee7 JK |
205 | { |
206 | dst->st_name = bfd_h_get_32 (abfd, (bfd_byte *) src->st_name); | |
238ac6ec KR |
207 | dst->st_value = get_word (abfd, (bfd_byte *) src->st_value); |
208 | dst->st_size = get_word (abfd, (bfd_byte *) src->st_size); | |
244ffee7 JK |
209 | dst->st_info = bfd_h_get_8 (abfd, (bfd_byte *) src->st_info); |
210 | dst->st_other = bfd_h_get_8 (abfd, (bfd_byte *) src->st_other); | |
211 | dst->st_shndx = bfd_h_get_16 (abfd, (bfd_byte *) src->st_shndx); | |
212 | } | |
213 | ||
214 | /* Translate an ELF symbol in internal format into an ELF symbol in external | |
215 | format. */ | |
216 | ||
71edd06d | 217 | void |
1c6042ee ILT |
218 | elf_swap_symbol_out (abfd, src, dst) |
219 | bfd *abfd; | |
220 | Elf_Internal_Sym *src; | |
221 | Elf_External_Sym *dst; | |
244ffee7 JK |
222 | { |
223 | bfd_h_put_32 (abfd, src->st_name, dst->st_name); | |
238ac6ec KR |
224 | put_word (abfd, src->st_value, dst->st_value); |
225 | put_word (abfd, src->st_size, dst->st_size); | |
244ffee7 JK |
226 | bfd_h_put_8 (abfd, src->st_info, dst->st_info); |
227 | bfd_h_put_8 (abfd, src->st_other, dst->st_other); | |
228 | bfd_h_put_16 (abfd, src->st_shndx, dst->st_shndx); | |
229 | } | |
230 | ||
231 | ||
232 | /* Translate an ELF file header in external format into an ELF file header in | |
233 | internal format. */ | |
234 | ||
235 | static void | |
1c6042ee ILT |
236 | elf_swap_ehdr_in (abfd, src, dst) |
237 | bfd *abfd; | |
238 | Elf_External_Ehdr *src; | |
239 | Elf_Internal_Ehdr *dst; | |
244ffee7 JK |
240 | { |
241 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); | |
242 | dst->e_type = bfd_h_get_16 (abfd, (bfd_byte *) src->e_type); | |
243 | dst->e_machine = bfd_h_get_16 (abfd, (bfd_byte *) src->e_machine); | |
244 | dst->e_version = bfd_h_get_32 (abfd, (bfd_byte *) src->e_version); | |
238ac6ec KR |
245 | dst->e_entry = get_word (abfd, (bfd_byte *) src->e_entry); |
246 | dst->e_phoff = get_word (abfd, (bfd_byte *) src->e_phoff); | |
247 | dst->e_shoff = get_word (abfd, (bfd_byte *) src->e_shoff); | |
244ffee7 JK |
248 | dst->e_flags = bfd_h_get_32 (abfd, (bfd_byte *) src->e_flags); |
249 | dst->e_ehsize = bfd_h_get_16 (abfd, (bfd_byte *) src->e_ehsize); | |
250 | dst->e_phentsize = bfd_h_get_16 (abfd, (bfd_byte *) src->e_phentsize); | |
251 | dst->e_phnum = bfd_h_get_16 (abfd, (bfd_byte *) src->e_phnum); | |
252 | dst->e_shentsize = bfd_h_get_16 (abfd, (bfd_byte *) src->e_shentsize); | |
253 | dst->e_shnum = bfd_h_get_16 (abfd, (bfd_byte *) src->e_shnum); | |
254 | dst->e_shstrndx = bfd_h_get_16 (abfd, (bfd_byte *) src->e_shstrndx); | |
255 | } | |
256 | ||
257 | /* Translate an ELF file header in internal format into an ELF file header in | |
258 | external format. */ | |
259 | ||
260 | static void | |
1c6042ee ILT |
261 | elf_swap_ehdr_out (abfd, src, dst) |
262 | bfd *abfd; | |
263 | Elf_Internal_Ehdr *src; | |
264 | Elf_External_Ehdr *dst; | |
244ffee7 JK |
265 | { |
266 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); | |
267 | /* note that all elements of dst are *arrays of unsigned char* already... */ | |
268 | bfd_h_put_16 (abfd, src->e_type, dst->e_type); | |
269 | bfd_h_put_16 (abfd, src->e_machine, dst->e_machine); | |
270 | bfd_h_put_32 (abfd, src->e_version, dst->e_version); | |
238ac6ec KR |
271 | put_word (abfd, src->e_entry, dst->e_entry); |
272 | put_word (abfd, src->e_phoff, dst->e_phoff); | |
273 | put_word (abfd, src->e_shoff, dst->e_shoff); | |
244ffee7 JK |
274 | bfd_h_put_32 (abfd, src->e_flags, dst->e_flags); |
275 | bfd_h_put_16 (abfd, src->e_ehsize, dst->e_ehsize); | |
276 | bfd_h_put_16 (abfd, src->e_phentsize, dst->e_phentsize); | |
277 | bfd_h_put_16 (abfd, src->e_phnum, dst->e_phnum); | |
278 | bfd_h_put_16 (abfd, src->e_shentsize, dst->e_shentsize); | |
279 | bfd_h_put_16 (abfd, src->e_shnum, dst->e_shnum); | |
280 | bfd_h_put_16 (abfd, src->e_shstrndx, dst->e_shstrndx); | |
281 | } | |
282 | ||
283 | ||
284 | /* Translate an ELF section header table entry in external format into an | |
285 | ELF section header table entry in internal format. */ | |
286 | ||
287 | static void | |
1c6042ee ILT |
288 | elf_swap_shdr_in (abfd, src, dst) |
289 | bfd *abfd; | |
290 | Elf_External_Shdr *src; | |
291 | Elf_Internal_Shdr *dst; | |
244ffee7 JK |
292 | { |
293 | dst->sh_name = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_name); | |
294 | dst->sh_type = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_type); | |
238ac6ec KR |
295 | dst->sh_flags = get_word (abfd, (bfd_byte *) src->sh_flags); |
296 | dst->sh_addr = get_word (abfd, (bfd_byte *) src->sh_addr); | |
297 | dst->sh_offset = get_word (abfd, (bfd_byte *) src->sh_offset); | |
298 | dst->sh_size = get_word (abfd, (bfd_byte *) src->sh_size); | |
244ffee7 JK |
299 | dst->sh_link = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_link); |
300 | dst->sh_info = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_info); | |
238ac6ec KR |
301 | dst->sh_addralign = get_word (abfd, (bfd_byte *) src->sh_addralign); |
302 | dst->sh_entsize = get_word (abfd, (bfd_byte *) src->sh_entsize); | |
244ffee7 JK |
303 | /* we haven't done any processing on it yet, so... */ |
304 | dst->rawdata = (void *) 0; | |
305 | } | |
306 | ||
307 | /* Translate an ELF section header table entry in internal format into an | |
308 | ELF section header table entry in external format. */ | |
309 | ||
310 | static void | |
1c6042ee ILT |
311 | elf_swap_shdr_out (abfd, src, dst) |
312 | bfd *abfd; | |
313 | Elf_Internal_Shdr *src; | |
314 | Elf_External_Shdr *dst; | |
244ffee7 JK |
315 | { |
316 | /* note that all elements of dst are *arrays of unsigned char* already... */ | |
317 | bfd_h_put_32 (abfd, src->sh_name, dst->sh_name); | |
318 | bfd_h_put_32 (abfd, src->sh_type, dst->sh_type); | |
238ac6ec KR |
319 | put_word (abfd, src->sh_flags, dst->sh_flags); |
320 | put_word (abfd, src->sh_addr, dst->sh_addr); | |
321 | put_word (abfd, src->sh_offset, dst->sh_offset); | |
322 | put_word (abfd, src->sh_size, dst->sh_size); | |
244ffee7 JK |
323 | bfd_h_put_32 (abfd, src->sh_link, dst->sh_link); |
324 | bfd_h_put_32 (abfd, src->sh_info, dst->sh_info); | |
238ac6ec KR |
325 | put_word (abfd, src->sh_addralign, dst->sh_addralign); |
326 | put_word (abfd, src->sh_entsize, dst->sh_entsize); | |
244ffee7 JK |
327 | } |
328 | ||
329 | ||
330 | /* Translate an ELF program header table entry in external format into an | |
331 | ELF program header table entry in internal format. */ | |
332 | ||
333 | static void | |
1c6042ee ILT |
334 | elf_swap_phdr_in (abfd, src, dst) |
335 | bfd *abfd; | |
336 | Elf_External_Phdr *src; | |
337 | Elf_Internal_Phdr *dst; | |
244ffee7 JK |
338 | { |
339 | dst->p_type = bfd_h_get_32 (abfd, (bfd_byte *) src->p_type); | |
244ffee7 | 340 | dst->p_flags = bfd_h_get_32 (abfd, (bfd_byte *) src->p_flags); |
238ac6ec KR |
341 | dst->p_offset = get_word (abfd, (bfd_byte *) src->p_offset); |
342 | dst->p_vaddr = get_word (abfd, (bfd_byte *) src->p_vaddr); | |
343 | dst->p_paddr = get_word (abfd, (bfd_byte *) src->p_paddr); | |
344 | dst->p_filesz = get_word (abfd, (bfd_byte *) src->p_filesz); | |
345 | dst->p_memsz = get_word (abfd, (bfd_byte *) src->p_memsz); | |
346 | dst->p_align = get_word (abfd, (bfd_byte *) src->p_align); | |
244ffee7 JK |
347 | } |
348 | ||
244ffee7 | 349 | static void |
1c6042ee ILT |
350 | elf_swap_phdr_out (abfd, src, dst) |
351 | bfd *abfd; | |
352 | Elf_Internal_Phdr *src; | |
353 | Elf_External_Phdr *dst; | |
244ffee7 JK |
354 | { |
355 | /* note that all elements of dst are *arrays of unsigned char* already... */ | |
356 | bfd_h_put_32 (abfd, src->p_type, dst->p_type); | |
94dbb655 KR |
357 | put_word (abfd, src->p_offset, dst->p_offset); |
358 | put_word (abfd, src->p_vaddr, dst->p_vaddr); | |
359 | put_word (abfd, src->p_paddr, dst->p_paddr); | |
360 | put_word (abfd, src->p_filesz, dst->p_filesz); | |
361 | put_word (abfd, src->p_memsz, dst->p_memsz); | |
244ffee7 | 362 | bfd_h_put_32 (abfd, src->p_flags, dst->p_flags); |
94dbb655 | 363 | put_word (abfd, src->p_align, dst->p_align); |
244ffee7 JK |
364 | } |
365 | ||
366 | /* Translate an ELF reloc from external format to internal format. */ | |
013dec1a | 367 | INLINE void |
1c6042ee ILT |
368 | elf_swap_reloc_in (abfd, src, dst) |
369 | bfd *abfd; | |
370 | Elf_External_Rel *src; | |
371 | Elf_Internal_Rel *dst; | |
244ffee7 | 372 | { |
94dbb655 KR |
373 | dst->r_offset = get_word (abfd, (bfd_byte *) src->r_offset); |
374 | dst->r_info = get_word (abfd, (bfd_byte *) src->r_info); | |
244ffee7 JK |
375 | } |
376 | ||
013dec1a | 377 | INLINE void |
1c6042ee ILT |
378 | elf_swap_reloca_in (abfd, src, dst) |
379 | bfd *abfd; | |
380 | Elf_External_Rela *src; | |
381 | Elf_Internal_Rela *dst; | |
244ffee7 | 382 | { |
94dbb655 KR |
383 | dst->r_offset = get_word (abfd, (bfd_byte *) src->r_offset); |
384 | dst->r_info = get_word (abfd, (bfd_byte *) src->r_info); | |
385 | dst->r_addend = get_word (abfd, (bfd_byte *) src->r_addend); | |
244ffee7 JK |
386 | } |
387 | ||
388 | /* Translate an ELF reloc from internal format to external format. */ | |
013dec1a | 389 | INLINE void |
1c6042ee ILT |
390 | elf_swap_reloc_out (abfd, src, dst) |
391 | bfd *abfd; | |
392 | Elf_Internal_Rel *src; | |
393 | Elf_External_Rel *dst; | |
244ffee7 | 394 | { |
94dbb655 KR |
395 | put_word (abfd, src->r_offset, dst->r_offset); |
396 | put_word (abfd, src->r_info, dst->r_info); | |
244ffee7 JK |
397 | } |
398 | ||
013dec1a | 399 | INLINE void |
1c6042ee ILT |
400 | elf_swap_reloca_out (abfd, src, dst) |
401 | bfd *abfd; | |
402 | Elf_Internal_Rela *src; | |
403 | Elf_External_Rela *dst; | |
244ffee7 | 404 | { |
94dbb655 KR |
405 | put_word (abfd, src->r_offset, dst->r_offset); |
406 | put_word (abfd, src->r_info, dst->r_info); | |
407 | put_word (abfd, src->r_addend, dst->r_addend); | |
244ffee7 | 408 | } |
32090b8e | 409 | |
013dec1a ILT |
410 | INLINE void |
411 | elf_swap_dyn_in (abfd, src, dst) | |
412 | bfd *abfd; | |
413 | const Elf_External_Dyn *src; | |
414 | Elf_Internal_Dyn *dst; | |
415 | { | |
416 | dst->d_tag = get_word (abfd, src->d_tag); | |
417 | dst->d_un.d_val = get_word (abfd, src->d_un.d_val); | |
418 | } | |
1c6042ee | 419 | |
013dec1a ILT |
420 | INLINE void |
421 | elf_swap_dyn_out (abfd, src, dst) | |
422 | bfd *abfd; | |
423 | const Elf_Internal_Dyn *src; | |
424 | Elf_External_Dyn *dst; | |
425 | { | |
426 | put_word (abfd, src->d_tag, dst->d_tag); | |
427 | put_word (abfd, src->d_un.d_val, dst->d_un.d_val); | |
428 | } | |
429 | \f | |
32090b8e KR |
430 | /* String table creation/manipulation routines */ |
431 | ||
432 | static struct strtab * | |
1c6042ee ILT |
433 | bfd_new_strtab (abfd) |
434 | bfd *abfd; | |
32090b8e KR |
435 | { |
436 | struct strtab *ss; | |
437 | ||
b9d5cdf0 DM |
438 | ss = (struct strtab *) malloc (sizeof (struct strtab)); |
439 | if (!ss) | |
440 | { | |
d1ad85a6 | 441 | bfd_set_error (bfd_error_no_memory); |
b9d5cdf0 DM |
442 | return NULL; |
443 | } | |
444 | ss->tab = malloc (1); | |
445 | if (!ss->tab) | |
446 | { | |
d1ad85a6 | 447 | bfd_set_error (bfd_error_no_memory); |
b9d5cdf0 DM |
448 | return NULL; |
449 | } | |
32090b8e KR |
450 | *ss->tab = 0; |
451 | ss->nentries = 0; | |
452 | ss->length = 1; | |
244ffee7 | 453 | |
32090b8e KR |
454 | return ss; |
455 | } | |
456 | ||
6ec3bb6a | 457 | static unsigned long |
1c6042ee ILT |
458 | bfd_add_to_strtab (abfd, ss, str) |
459 | bfd *abfd; | |
460 | struct strtab *ss; | |
6ec3bb6a | 461 | const char *str; |
32090b8e KR |
462 | { |
463 | /* should search first, but for now: */ | |
464 | /* include the trailing NUL */ | |
465 | int ln = strlen (str) + 1; | |
466 | ||
6ec3bb6a ILT |
467 | /* FIXME: This is slow. Also, we could combine this with the a.out |
468 | string table building and use a hash table, although it might not | |
469 | be worth it since ELF symbols don't include debugging information | |
470 | and thus have much less overlap. */ | |
32090b8e | 471 | ss->tab = realloc (ss->tab, ss->length + ln); |
6ec3bb6a ILT |
472 | if (ss->tab == NULL) |
473 | { | |
474 | bfd_set_error (bfd_error_no_memory); | |
475 | return (unsigned long) -1; | |
476 | } | |
32090b8e | 477 | |
32090b8e KR |
478 | strcpy (ss->tab + ss->length, str); |
479 | ss->nentries++; | |
480 | ss->length += ln; | |
481 | ||
482 | return ss->length - ln; | |
483 | } | |
484 | ||
485 | static int | |
1c6042ee ILT |
486 | bfd_add_2_to_strtab (abfd, ss, str, str2) |
487 | bfd *abfd; | |
488 | struct strtab *ss; | |
489 | char *str; | |
490 | CONST char *str2; | |
244ffee7 | 491 | { |
32090b8e KR |
492 | /* should search first, but for now: */ |
493 | /* include the trailing NUL */ | |
494 | int ln = strlen (str) + strlen (str2) + 1; | |
495 | ||
496 | /* should this be using obstacks? */ | |
497 | if (ss->length) | |
498 | ss->tab = realloc (ss->tab, ss->length + ln); | |
499 | else | |
b9d5cdf0 | 500 | ss->tab = malloc (ln); |
32090b8e | 501 | |
9783e04a | 502 | BFD_ASSERT (ss->tab != 0); /* FIXME */ |
32090b8e KR |
503 | strcpy (ss->tab + ss->length, str); |
504 | strcpy (ss->tab + ss->length + strlen (str), str2); | |
505 | ss->nentries++; | |
506 | ss->length += ln; | |
507 | ||
508 | return ss->length - ln; | |
244ffee7 | 509 | } |
32090b8e KR |
510 | \f |
511 | /* ELF .o/exec file reading */ | |
512 | ||
513 | /* Create a new bfd section from an ELF section header. */ | |
514 | ||
244ffee7 | 515 | static boolean |
1c6042ee ILT |
516 | bfd_section_from_shdr (abfd, shindex) |
517 | bfd *abfd; | |
518 | unsigned int shindex; | |
244ffee7 | 519 | { |
32090b8e KR |
520 | Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex]; |
521 | Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd); | |
244ffee7 JK |
522 | char *name; |
523 | ||
524 | name = elf_string_from_elf_strtab (abfd, hdr->sh_name); | |
525 | ||
526 | switch (hdr->sh_type) | |
527 | { | |
244ffee7 | 528 | case SHT_NULL: |
497c5434 | 529 | /* Inactive section. Throw it away. */ |
244ffee7 JK |
530 | return true; |
531 | ||
497c5434 ILT |
532 | case SHT_PROGBITS: /* Normal section with contents. */ |
533 | case SHT_DYNAMIC: /* Dynamic linking information. */ | |
534 | case SHT_NOBITS: /* .bss section. */ | |
fa15568a | 535 | case SHT_HASH: /* .hash section. */ |
497c5434 | 536 | return _bfd_elf_make_section_from_shdr (abfd, hdr, name); |
244ffee7 JK |
537 | |
538 | case SHT_SYMTAB: /* A symbol table */ | |
32090b8e KR |
539 | if (elf_onesymtab (abfd) == shindex) |
540 | return true; | |
541 | ||
244ffee7 | 542 | BFD_ASSERT (hdr->sh_entsize == sizeof (Elf_External_Sym)); |
32090b8e | 543 | BFD_ASSERT (elf_onesymtab (abfd) == 0); |
244ffee7 | 544 | elf_onesymtab (abfd) = shindex; |
1c6042ee ILT |
545 | elf_tdata (abfd)->symtab_hdr = *hdr; |
546 | elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_hdr; | |
244ffee7 | 547 | abfd->flags |= HAS_SYMS; |
823609fe ILT |
548 | |
549 | /* Sometimes a shared object will map in the symbol table. If | |
550 | SHF_ALLOC is set, and this is a shared object, then we also | |
551 | treat this section as a BFD section. We can not base the | |
552 | decision purely on SHF_ALLOC, because that flag is sometimes | |
553 | set in a relocateable object file, which would confuse the | |
554 | linker. */ | |
555 | if ((hdr->sh_flags & SHF_ALLOC) != 0 | |
556 | && (abfd->flags & DYNAMIC) != 0 | |
557 | && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name)) | |
558 | return false; | |
559 | ||
244ffee7 JK |
560 | return true; |
561 | ||
cb71adf1 PS |
562 | case SHT_DYNSYM: /* A dynamic symbol table */ |
563 | if (elf_dynsymtab (abfd) == shindex) | |
564 | return true; | |
565 | ||
566 | BFD_ASSERT (hdr->sh_entsize == sizeof (Elf_External_Sym)); | |
567 | BFD_ASSERT (elf_dynsymtab (abfd) == 0); | |
568 | elf_dynsymtab (abfd) = shindex; | |
569 | elf_tdata (abfd)->dynsymtab_hdr = *hdr; | |
570 | elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->dynsymtab_hdr; | |
571 | abfd->flags |= HAS_SYMS; | |
fa15568a ILT |
572 | |
573 | /* Besides being a symbol table, we also treat this as a regular | |
574 | section, so that objcopy can handle it. */ | |
575 | return _bfd_elf_make_section_from_shdr (abfd, hdr, name); | |
cb71adf1 | 576 | |
244ffee7 | 577 | case SHT_STRTAB: /* A string table */ |
497c5434 | 578 | if (hdr->rawdata != NULL) |
fce36137 | 579 | return true; |
32090b8e KR |
580 | if (ehdr->e_shstrndx == shindex) |
581 | { | |
1c6042ee ILT |
582 | elf_tdata (abfd)->shstrtab_hdr = *hdr; |
583 | elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr; | |
584 | hdr->rawdata = (PTR) & elf_tdata (abfd)->shstrtab_hdr; | |
32090b8e KR |
585 | return true; |
586 | } | |
587 | { | |
68241b2b | 588 | unsigned int i; |
fce36137 | 589 | |
32090b8e KR |
590 | for (i = 1; i < ehdr->e_shnum; i++) |
591 | { | |
1c6042ee | 592 | Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i]; |
32090b8e KR |
593 | if (hdr2->sh_link == shindex) |
594 | { | |
2e03ce18 ILT |
595 | if (! bfd_section_from_shdr (abfd, i)) |
596 | return false; | |
32090b8e KR |
597 | if (elf_onesymtab (abfd) == i) |
598 | { | |
1c6042ee | 599 | elf_tdata (abfd)->strtab_hdr = *hdr; |
fa15568a ILT |
600 | elf_elfsections (abfd)[shindex] = |
601 | &elf_tdata (abfd)->strtab_hdr; | |
32090b8e KR |
602 | return true; |
603 | } | |
cb71adf1 PS |
604 | if (elf_dynsymtab (abfd) == i) |
605 | { | |
606 | elf_tdata (abfd)->dynstrtab_hdr = *hdr; | |
fa15568a ILT |
607 | elf_elfsections (abfd)[shindex] = |
608 | &elf_tdata (abfd)->dynstrtab_hdr; | |
609 | /* We also treat this as a regular section, so | |
610 | that objcopy can handle it. */ | |
611 | break; | |
cb71adf1 | 612 | } |
2e03ce18 | 613 | #if 0 /* Not handling other string tables specially right now. */ |
1c6042ee | 614 | hdr2 = elf_elfsections (abfd)[i]; /* in case it moved */ |
32090b8e KR |
615 | /* We have a strtab for some random other section. */ |
616 | newsect = (asection *) hdr2->rawdata; | |
617 | if (!newsect) | |
618 | break; | |
619 | hdr->rawdata = (PTR) newsect; | |
620 | hdr2 = &elf_section_data (newsect)->str_hdr; | |
621 | *hdr2 = *hdr; | |
1c6042ee | 622 | elf_elfsections (abfd)[shindex] = hdr2; |
32090b8e KR |
623 | #endif |
624 | } | |
625 | } | |
626 | } | |
627 | ||
497c5434 | 628 | return _bfd_elf_make_section_from_shdr (abfd, hdr, name); |
244ffee7 JK |
629 | |
630 | case SHT_REL: | |
631 | case SHT_RELA: | |
497c5434 | 632 | /* *These* do a lot of work -- but build no sections! */ |
244ffee7 JK |
633 | { |
634 | asection *target_sect; | |
32090b8e | 635 | Elf_Internal_Shdr *hdr2; |
244ffee7 JK |
636 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; |
637 | ||
497c5434 ILT |
638 | /* Get the symbol table. */ |
639 | if (! bfd_section_from_shdr (abfd, hdr->sh_link)) | |
640 | return false; | |
641 | ||
e6667b2b ILT |
642 | /* If this reloc section does not use the main symbol table we |
643 | don't treat it as a reloc section. BFD can't adequately | |
644 | represent such a section, so at least for now, we don't | |
645 | try. We just present it as a normal section. */ | |
646 | if (hdr->sh_link != elf_onesymtab (abfd)) | |
497c5434 ILT |
647 | return _bfd_elf_make_section_from_shdr (abfd, hdr, name); |
648 | ||
244ffee7 JK |
649 | /* Don't allow REL relocations on a machine that uses RELA and |
650 | vice versa. */ | |
651 | /* @@ Actually, the generic ABI does suggest that both might be | |
652 | used in one file. But the four ABI Processor Supplements I | |
653 | have access to right now all specify that only one is used on | |
654 | each of those architectures. It's conceivable that, e.g., a | |
655 | bunch of absolute 32-bit relocs might be more compact in REL | |
656 | form even on a RELA machine... */ | |
497c5434 ILT |
657 | BFD_ASSERT (use_rela_p |
658 | ? (hdr->sh_type == SHT_RELA | |
659 | && hdr->sh_entsize == sizeof (Elf_External_Rela)) | |
660 | : (hdr->sh_type == SHT_REL | |
661 | && hdr->sh_entsize == sizeof (Elf_External_Rel))); | |
662 | ||
663 | if (! bfd_section_from_shdr (abfd, hdr->sh_info)) | |
2e03ce18 | 664 | return false; |
244ffee7 | 665 | target_sect = section_from_elf_index (abfd, hdr->sh_info); |
062189c6 ILT |
666 | if (target_sect == NULL |
667 | || elf_section_data (target_sect) == NULL) | |
244ffee7 JK |
668 | return false; |
669 | ||
32090b8e KR |
670 | hdr2 = &elf_section_data (target_sect)->rel_hdr; |
671 | *hdr2 = *hdr; | |
1c6042ee | 672 | elf_elfsections (abfd)[shindex] = hdr2; |
244ffee7 JK |
673 | target_sect->reloc_count = hdr->sh_size / hdr->sh_entsize; |
674 | target_sect->flags |= SEC_RELOC; | |
497c5434 | 675 | target_sect->relocation = NULL; |
244ffee7 | 676 | target_sect->rel_filepos = hdr->sh_offset; |
32090b8e | 677 | abfd->flags |= HAS_RELOC; |
244ffee7 JK |
678 | return true; |
679 | } | |
680 | break; | |
681 | ||
244ffee7 JK |
682 | case SHT_NOTE: |
683 | #if 0 | |
684 | fprintf (stderr, "Note Sections not yet supported.\n"); | |
685 | BFD_FAIL (); | |
686 | #endif | |
687 | break; | |
688 | ||
689 | case SHT_SHLIB: | |
690 | #if 0 | |
691 | fprintf (stderr, "SHLIB Sections not supported (and non conforming.)\n"); | |
692 | #endif | |
693 | return true; | |
694 | ||
695 | default: | |
e621c5cc ILT |
696 | /* Check for any processor-specific section types. */ |
697 | { | |
698 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
699 | ||
700 | if (bed->elf_backend_section_from_shdr) | |
701 | (*bed->elf_backend_section_from_shdr) (abfd, hdr, name); | |
702 | } | |
244ffee7 JK |
703 | break; |
704 | } | |
705 | ||
706 | return true; | |
707 | } | |
708 | ||
fce36137 | 709 | boolean |
1c6042ee ILT |
710 | elf_new_section_hook (abfd, sec) |
711 | bfd *abfd | |
712 | ; | |
713 | asection *sec; | |
fce36137 | 714 | { |
32090b8e | 715 | struct bfd_elf_section_data *sdata; |
300adb31 KR |
716 | |
717 | sdata = (struct bfd_elf_section_data *) bfd_alloc (abfd, sizeof (*sdata)); | |
9783e04a DM |
718 | if (!sdata) |
719 | { | |
d1ad85a6 | 720 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
721 | return false; |
722 | } | |
300adb31 | 723 | sec->used_by_bfd = (PTR) sdata; |
32090b8e | 724 | memset (sdata, 0, sizeof (*sdata)); |
244ffee7 JK |
725 | return true; |
726 | } | |
727 | ||
728 | /* Create a new bfd section from an ELF program header. | |
729 | ||
730 | Since program segments have no names, we generate a synthetic name | |
731 | of the form segment<NUM>, where NUM is generally the index in the | |
732 | program header table. For segments that are split (see below) we | |
733 | generate the names segment<NUM>a and segment<NUM>b. | |
734 | ||
735 | Note that some program segments may have a file size that is different than | |
736 | (less than) the memory size. All this means is that at execution the | |
737 | system must allocate the amount of memory specified by the memory size, | |
738 | but only initialize it with the first "file size" bytes read from the | |
739 | file. This would occur for example, with program segments consisting | |
740 | of combined data+bss. | |
741 | ||
742 | To handle the above situation, this routine generates TWO bfd sections | |
743 | for the single program segment. The first has the length specified by | |
744 | the file size of the segment, and the second has the length specified | |
745 | by the difference between the two sizes. In effect, the segment is split | |
746 | into it's initialized and uninitialized parts. | |
747 | ||
748 | */ | |
749 | ||
750 | static boolean | |
1c6042ee ILT |
751 | bfd_section_from_phdr (abfd, hdr, index) |
752 | bfd *abfd; | |
753 | Elf_Internal_Phdr *hdr; | |
754 | int index; | |
244ffee7 JK |
755 | { |
756 | asection *newsect; | |
757 | char *name; | |
758 | char namebuf[64]; | |
759 | int split; | |
760 | ||
761 | split = ((hdr->p_memsz > 0) && | |
762 | (hdr->p_filesz > 0) && | |
763 | (hdr->p_memsz > hdr->p_filesz)); | |
764 | sprintf (namebuf, split ? "segment%da" : "segment%d", index); | |
765 | name = bfd_alloc (abfd, strlen (namebuf) + 1); | |
9783e04a DM |
766 | if (!name) |
767 | { | |
d1ad85a6 | 768 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
769 | return false; |
770 | } | |
244ffee7 JK |
771 | strcpy (name, namebuf); |
772 | newsect = bfd_make_section (abfd, name); | |
2e03ce18 ILT |
773 | if (newsect == NULL) |
774 | return false; | |
244ffee7 JK |
775 | newsect->vma = hdr->p_vaddr; |
776 | newsect->_raw_size = hdr->p_filesz; | |
777 | newsect->filepos = hdr->p_offset; | |
778 | newsect->flags |= SEC_HAS_CONTENTS; | |
779 | if (hdr->p_type == PT_LOAD) | |
780 | { | |
781 | newsect->flags |= SEC_ALLOC; | |
782 | newsect->flags |= SEC_LOAD; | |
783 | if (hdr->p_flags & PF_X) | |
784 | { | |
785 | /* FIXME: all we known is that it has execute PERMISSION, | |
786 | may be data. */ | |
787 | newsect->flags |= SEC_CODE; | |
788 | } | |
789 | } | |
790 | if (!(hdr->p_flags & PF_W)) | |
791 | { | |
792 | newsect->flags |= SEC_READONLY; | |
793 | } | |
794 | ||
795 | if (split) | |
796 | { | |
797 | sprintf (namebuf, "segment%db", index); | |
798 | name = bfd_alloc (abfd, strlen (namebuf) + 1); | |
9783e04a DM |
799 | if (!name) |
800 | { | |
d1ad85a6 | 801 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
802 | return false; |
803 | } | |
244ffee7 JK |
804 | strcpy (name, namebuf); |
805 | newsect = bfd_make_section (abfd, name); | |
2e03ce18 ILT |
806 | if (newsect == NULL) |
807 | return false; | |
244ffee7 JK |
808 | newsect->vma = hdr->p_vaddr + hdr->p_filesz; |
809 | newsect->_raw_size = hdr->p_memsz - hdr->p_filesz; | |
810 | if (hdr->p_type == PT_LOAD) | |
811 | { | |
812 | newsect->flags |= SEC_ALLOC; | |
813 | if (hdr->p_flags & PF_X) | |
814 | newsect->flags |= SEC_CODE; | |
815 | } | |
816 | if (!(hdr->p_flags & PF_W)) | |
817 | newsect->flags |= SEC_READONLY; | |
818 | } | |
819 | ||
820 | return true; | |
821 | } | |
822 | ||
32090b8e | 823 | /* Begin processing a given object. |
244ffee7 | 824 | |
32090b8e KR |
825 | First we validate the file by reading in the ELF header and checking |
826 | the magic number. */ | |
827 | ||
828 | static INLINE boolean | |
1c6042ee ILT |
829 | elf_file_p (x_ehdrp) |
830 | Elf_External_Ehdr *x_ehdrp; | |
244ffee7 | 831 | { |
32090b8e KR |
832 | return ((x_ehdrp->e_ident[EI_MAG0] == ELFMAG0) |
833 | && (x_ehdrp->e_ident[EI_MAG1] == ELFMAG1) | |
834 | && (x_ehdrp->e_ident[EI_MAG2] == ELFMAG2) | |
835 | && (x_ehdrp->e_ident[EI_MAG3] == ELFMAG3)); | |
836 | } | |
244ffee7 | 837 | |
d24928c0 KR |
838 | /* Check to see if the file associated with ABFD matches the target vector |
839 | that ABFD points to. | |
840 | ||
841 | Note that we may be called several times with the same ABFD, but different | |
842 | target vectors, most of which will not match. We have to avoid leaving | |
843 | any side effects in ABFD, or any data it points to (like tdata), if the | |
6ec3bb6a | 844 | file does not match the target vector. */ |
d24928c0 | 845 | |
2f3508ad | 846 | const bfd_target * |
1c6042ee ILT |
847 | elf_object_p (abfd) |
848 | bfd *abfd; | |
244ffee7 | 849 | { |
32090b8e KR |
850 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
851 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
852 | Elf_External_Shdr x_shdr; /* Section header table entry, external form */ | |
6ec3bb6a | 853 | Elf_Internal_Shdr *i_shdrp = NULL; /* Section header table, internal form */ |
68241b2b | 854 | unsigned int shindex; |
32090b8e | 855 | char *shstrtab; /* Internal copy of section header stringtab */ |
062189c6 | 856 | struct elf_backend_data *ebd; |
d24928c0 | 857 | struct elf_obj_tdata *preserved_tdata = elf_tdata (abfd); |
6ec3bb6a | 858 | struct elf_obj_tdata *new_tdata = NULL; |
244ffee7 | 859 | |
32090b8e KR |
860 | /* Read in the ELF header in external format. */ |
861 | ||
862 | if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr)) | |
25057836 JL |
863 | { |
864 | if (bfd_get_error () != bfd_error_system_call) | |
865 | goto got_wrong_format_error; | |
866 | else | |
867 | goto got_no_match; | |
868 | } | |
244ffee7 | 869 | |
32090b8e KR |
870 | /* Now check to see if we have a valid ELF file, and one that BFD can |
871 | make use of. The magic number must match, the address size ('class') | |
872 | and byte-swapping must match our XVEC entry, and it must have a | |
873 | section header table (FIXME: See comments re sections at top of this | |
874 | file). */ | |
244ffee7 | 875 | |
d24928c0 KR |
876 | if ((elf_file_p (&x_ehdr) == false) || |
877 | (x_ehdr.e_ident[EI_VERSION] != EV_CURRENT) || | |
878 | (x_ehdr.e_ident[EI_CLASS] != ELFCLASS)) | |
879 | goto got_wrong_format_error; | |
244ffee7 | 880 | |
d24928c0 | 881 | /* Check that file's byte order matches xvec's */ |
32090b8e | 882 | switch (x_ehdr.e_ident[EI_DATA]) |
244ffee7 | 883 | { |
32090b8e KR |
884 | case ELFDATA2MSB: /* Big-endian */ |
885 | if (!abfd->xvec->header_byteorder_big_p) | |
d24928c0 | 886 | goto got_wrong_format_error; |
32090b8e KR |
887 | break; |
888 | case ELFDATA2LSB: /* Little-endian */ | |
889 | if (abfd->xvec->header_byteorder_big_p) | |
d24928c0 | 890 | goto got_wrong_format_error; |
32090b8e KR |
891 | break; |
892 | case ELFDATANONE: /* No data encoding specified */ | |
893 | default: /* Unknown data encoding specified */ | |
d24928c0 | 894 | goto got_wrong_format_error; |
244ffee7 | 895 | } |
244ffee7 | 896 | |
32090b8e | 897 | /* Allocate an instance of the elf_obj_tdata structure and hook it up to |
6ec3bb6a | 898 | the tdata pointer in the bfd. */ |
244ffee7 | 899 | |
6ec3bb6a ILT |
900 | new_tdata = ((struct elf_obj_tdata *) |
901 | bfd_zalloc (abfd, sizeof (struct elf_obj_tdata))); | |
902 | if (new_tdata == NULL) | |
d24928c0 | 903 | goto got_no_memory_error; |
6ec3bb6a | 904 | elf_tdata (abfd) = new_tdata; |
244ffee7 | 905 | |
32090b8e KR |
906 | /* Now that we know the byte order, swap in the rest of the header */ |
907 | i_ehdrp = elf_elfheader (abfd); | |
908 | elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp); | |
909 | #if DEBUG & 1 | |
910 | elf_debug_file (i_ehdrp); | |
244ffee7 JK |
911 | #endif |
912 | ||
32090b8e KR |
913 | /* If there is no section header table, we're hosed. */ |
914 | if (i_ehdrp->e_shoff == 0) | |
d24928c0 | 915 | goto got_wrong_format_error; |
244ffee7 | 916 | |
062189c6 ILT |
917 | /* As a simple sanity check, verify that the what BFD thinks is the |
918 | size of each section header table entry actually matches the size | |
919 | recorded in the file. */ | |
920 | if (i_ehdrp->e_shentsize != sizeof (x_shdr)) | |
921 | goto got_wrong_format_error; | |
922 | ||
923 | ebd = get_elf_backend_data (abfd); | |
924 | ||
925 | /* Check that the ELF e_machine field matches what this particular | |
926 | BFD format expects. */ | |
927 | if (ebd->elf_machine_code != i_ehdrp->e_machine) | |
928 | { | |
2f3508ad | 929 | const bfd_target * const *target_ptr; |
062189c6 ILT |
930 | |
931 | if (ebd->elf_machine_code != EM_NONE) | |
932 | goto got_wrong_format_error; | |
933 | ||
934 | /* This is the generic ELF target. Let it match any ELF target | |
935 | for which we do not have a specific backend. */ | |
f4bd7a8f | 936 | for (target_ptr = bfd_target_vector; *target_ptr != NULL; target_ptr++) |
062189c6 ILT |
937 | { |
938 | struct elf_backend_data *back; | |
939 | ||
940 | if ((*target_ptr)->flavour != bfd_target_elf_flavour) | |
941 | continue; | |
942 | back = (struct elf_backend_data *) (*target_ptr)->backend_data; | |
943 | if (back->elf_machine_code == i_ehdrp->e_machine) | |
944 | { | |
945 | /* target_ptr is an ELF backend which matches this | |
946 | object file, so reject the generic ELF target. */ | |
947 | goto got_wrong_format_error; | |
948 | } | |
949 | } | |
950 | } | |
951 | ||
7b8106b4 | 952 | if (i_ehdrp->e_type == ET_EXEC) |
32090b8e | 953 | abfd->flags |= EXEC_P; |
7b8106b4 ILT |
954 | else if (i_ehdrp->e_type == ET_DYN) |
955 | abfd->flags |= DYNAMIC; | |
244ffee7 | 956 | |
fa15568a ILT |
957 | if (i_ehdrp->e_phnum > 0) |
958 | abfd->flags |= D_PAGED; | |
959 | ||
6ec3bb6a ILT |
960 | if (! bfd_default_set_arch_mach (abfd, ebd->arch, 0)) |
961 | goto got_no_match; | |
32090b8e | 962 | |
062189c6 ILT |
963 | /* Remember the entry point specified in the ELF file header. */ |
964 | bfd_get_start_address (abfd) = i_ehdrp->e_entry; | |
32090b8e KR |
965 | |
966 | /* Allocate space for a copy of the section header table in | |
967 | internal form, seek to the section header table in the file, | |
062189c6 | 968 | read it in, and convert it to internal form. */ |
6ec3bb6a ILT |
969 | i_shdrp = ((Elf_Internal_Shdr *) |
970 | bfd_alloc (abfd, sizeof (*i_shdrp) * i_ehdrp->e_shnum)); | |
971 | elf_elfsections (abfd) = ((Elf_Internal_Shdr **) | |
972 | bfd_alloc (abfd, | |
973 | sizeof (i_shdrp) * i_ehdrp->e_shnum)); | |
1c6042ee | 974 | if (!i_shdrp || !elf_elfsections (abfd)) |
d24928c0 | 975 | goto got_no_memory_error; |
6ec3bb6a | 976 | if (bfd_seek (abfd, i_ehdrp->e_shoff, SEEK_SET) != 0) |
25057836 | 977 | goto got_no_match; |
32090b8e | 978 | for (shindex = 0; shindex < i_ehdrp->e_shnum; shindex++) |
244ffee7 | 979 | { |
d24928c0 | 980 | if (bfd_read ((PTR) & x_shdr, sizeof x_shdr, 1, abfd) != sizeof (x_shdr)) |
25057836 | 981 | goto got_no_match; |
32090b8e | 982 | elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex); |
1c6042ee | 983 | elf_elfsections (abfd)[shindex] = i_shdrp + shindex; |
244ffee7 | 984 | } |
32090b8e | 985 | if (i_ehdrp->e_shstrndx) |
244ffee7 | 986 | { |
2e03ce18 ILT |
987 | if (! bfd_section_from_shdr (abfd, i_ehdrp->e_shstrndx)) |
988 | goto got_no_match; | |
244ffee7 JK |
989 | } |
990 | ||
32090b8e KR |
991 | /* Read in the string table containing the names of the sections. We |
992 | will need the base pointer to this table later. */ | |
993 | /* We read this inline now, so that we don't have to go through | |
994 | bfd_section_from_shdr with it (since this particular strtab is | |
995 | used to find all of the ELF section names.) */ | |
244ffee7 | 996 | |
32090b8e KR |
997 | shstrtab = elf_get_str_section (abfd, i_ehdrp->e_shstrndx); |
998 | if (!shstrtab) | |
6ec3bb6a | 999 | goto got_no_match; |
244ffee7 | 1000 | |
32090b8e KR |
1001 | /* Once all of the section headers have been read and converted, we |
1002 | can start processing them. Note that the first section header is | |
6ec3bb6a | 1003 | a dummy placeholder entry, so we ignore it. */ |
244ffee7 | 1004 | |
32090b8e KR |
1005 | for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++) |
1006 | { | |
2e03ce18 ILT |
1007 | if (! bfd_section_from_shdr (abfd, shindex)) |
1008 | goto got_no_match; | |
32090b8e | 1009 | } |
244ffee7 | 1010 | |
5315c428 ILT |
1011 | /* Let the backend double check the format and override global |
1012 | information. */ | |
1013 | if (ebd->elf_backend_object_p) | |
1014 | { | |
1015 | if ((*ebd->elf_backend_object_p) (abfd) == false) | |
1016 | goto got_wrong_format_error; | |
1017 | } | |
1018 | ||
d24928c0 KR |
1019 | return (abfd->xvec); |
1020 | ||
1c6042ee | 1021 | got_wrong_format_error: |
d1ad85a6 | 1022 | bfd_set_error (bfd_error_wrong_format); |
d24928c0 | 1023 | goto got_no_match; |
1c6042ee | 1024 | got_no_memory_error: |
d1ad85a6 | 1025 | bfd_set_error (bfd_error_no_memory); |
d24928c0 | 1026 | goto got_no_match; |
1c6042ee | 1027 | got_no_match: |
6ec3bb6a ILT |
1028 | if (new_tdata != NULL |
1029 | && new_tdata->elf_sect_ptr != NULL) | |
1030 | bfd_release (abfd, new_tdata->elf_sect_ptr); | |
1031 | if (i_shdrp != NULL) | |
1032 | bfd_release (abfd, i_shdrp); | |
1033 | if (new_tdata != NULL) | |
1034 | bfd_release (abfd, new_tdata); | |
d24928c0 KR |
1035 | elf_tdata (abfd) = preserved_tdata; |
1036 | return (NULL); | |
32090b8e | 1037 | } |
32090b8e | 1038 | \f |
1c6042ee | 1039 | |
32090b8e KR |
1040 | /* ELF .o/exec file writing */ |
1041 | ||
d24928c0 KR |
1042 | /* Takes a bfd and a symbol, returns a pointer to the elf specific area |
1043 | of the symbol if there is one. */ | |
32090b8e | 1044 | static INLINE elf_symbol_type * |
1c6042ee ILT |
1045 | elf_symbol_from (ignore_abfd, symbol) |
1046 | bfd *ignore_abfd; | |
1047 | asymbol *symbol; | |
244ffee7 | 1048 | { |
32090b8e KR |
1049 | if (symbol->the_bfd->xvec->flavour != bfd_target_elf_flavour) |
1050 | return 0; | |
1051 | ||
1052 | if (symbol->the_bfd->tdata.elf_obj_data == (struct elf_obj_tdata *) NULL) | |
1053 | return 0; | |
1054 | ||
1055 | return (elf_symbol_type *) symbol; | |
244ffee7 JK |
1056 | } |
1057 | ||
32090b8e KR |
1058 | void |
1059 | write_relocs (abfd, sec, xxx) | |
1060 | bfd *abfd; | |
1061 | asection *sec; | |
1062 | PTR xxx; | |
1063 | { | |
1064 | Elf_Internal_Shdr *rela_hdr; | |
1065 | Elf_External_Rela *outbound_relocas; | |
1066 | Elf_External_Rel *outbound_relocs; | |
1067 | int idx; | |
1068 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; | |
300adb31 | 1069 | asymbol *last_sym = 0; |
38a5f510 | 1070 | int last_sym_idx = 9999999; /* should always be written before use */ |
244ffee7 | 1071 | |
32090b8e KR |
1072 | if ((sec->flags & SEC_RELOC) == 0) |
1073 | return; | |
6ec3bb6a ILT |
1074 | |
1075 | /* The linker backend writes the relocs out itself, and sets the | |
1076 | reloc_count field to zero to inhibit writing them here. Also, | |
1077 | sometimes the SEC_RELOC flag gets set even when there aren't any | |
1078 | relocs. */ | |
32090b8e KR |
1079 | if (sec->reloc_count == 0) |
1080 | return; | |
244ffee7 | 1081 | |
32090b8e | 1082 | rela_hdr = &elf_section_data (sec)->rel_hdr; |
244ffee7 | 1083 | |
32090b8e KR |
1084 | rela_hdr->sh_size = rela_hdr->sh_entsize * sec->reloc_count; |
1085 | rela_hdr->contents = (void *) bfd_alloc (abfd, rela_hdr->sh_size); | |
9783e04a DM |
1086 | if (!rela_hdr->contents) |
1087 | { | |
d1ad85a6 | 1088 | bfd_set_error (bfd_error_no_memory); |
1c6042ee | 1089 | abort (); /* FIXME */ |
9783e04a | 1090 | } |
244ffee7 | 1091 | |
32090b8e | 1092 | /* orelocation has the data, reloc_count has the count... */ |
300adb31 KR |
1093 | if (use_rela_p) |
1094 | { | |
1095 | outbound_relocas = (Elf_External_Rela *) rela_hdr->contents; | |
1096 | ||
1097 | for (idx = 0; idx < sec->reloc_count; idx++) | |
32090b8e | 1098 | { |
300adb31 KR |
1099 | Elf_Internal_Rela dst_rela; |
1100 | Elf_External_Rela *src_rela; | |
1101 | arelent *ptr; | |
1102 | asymbol *sym; | |
1103 | int n; | |
1104 | ||
1105 | ptr = sec->orelocation[idx]; | |
1106 | src_rela = outbound_relocas + idx; | |
1107 | if (!(abfd->flags & EXEC_P)) | |
1108 | dst_rela.r_offset = ptr->address - sec->vma; | |
1109 | else | |
1110 | dst_rela.r_offset = ptr->address; | |
6a3eb9b6 | 1111 | |
300adb31 KR |
1112 | sym = *ptr->sym_ptr_ptr; |
1113 | if (sym == last_sym) | |
1114 | n = last_sym_idx; | |
1115 | else | |
32090b8e | 1116 | { |
300adb31 KR |
1117 | last_sym = sym; |
1118 | last_sym_idx = n = elf_symbol_from_bfd_symbol (abfd, &sym); | |
32090b8e | 1119 | } |
300adb31 KR |
1120 | dst_rela.r_info = ELF_R_INFO (n, ptr->howto->type); |
1121 | ||
1122 | dst_rela.r_addend = ptr->addend; | |
1123 | elf_swap_reloca_out (abfd, &dst_rela, src_rela); | |
244ffee7 | 1124 | } |
300adb31 KR |
1125 | } |
1126 | else | |
1127 | /* REL relocations */ | |
1128 | { | |
1129 | outbound_relocs = (Elf_External_Rel *) rela_hdr->contents; | |
1130 | ||
1131 | for (idx = 0; idx < sec->reloc_count; idx++) | |
32090b8e | 1132 | { |
300adb31 KR |
1133 | Elf_Internal_Rel dst_rel; |
1134 | Elf_External_Rel *src_rel; | |
1135 | arelent *ptr; | |
1136 | int n; | |
1137 | asymbol *sym; | |
1138 | ||
1139 | ptr = sec->orelocation[idx]; | |
1140 | sym = *ptr->sym_ptr_ptr; | |
1141 | src_rel = outbound_relocs + idx; | |
1142 | if (!(abfd->flags & EXEC_P)) | |
1143 | dst_rel.r_offset = ptr->address - sec->vma; | |
1144 | else | |
1145 | dst_rel.r_offset = ptr->address; | |
244ffee7 | 1146 | |
300adb31 KR |
1147 | if (sym == last_sym) |
1148 | n = last_sym_idx; | |
1149 | else | |
32090b8e | 1150 | { |
300adb31 KR |
1151 | last_sym = sym; |
1152 | last_sym_idx = n = elf_symbol_from_bfd_symbol (abfd, &sym); | |
32090b8e | 1153 | } |
300adb31 KR |
1154 | dst_rel.r_info = ELF_R_INFO (n, ptr->howto->type); |
1155 | ||
1156 | elf_swap_reloc_out (abfd, &dst_rel, src_rel); | |
32090b8e | 1157 | } |
300adb31 | 1158 | } |
32090b8e | 1159 | } |
244ffee7 | 1160 | |
fa15568a | 1161 | /* Set up an ELF internal section header for a section. */ |
244ffee7 | 1162 | |
fa15568a | 1163 | /*ARGSUSED*/ |
32090b8e | 1164 | static void |
fa15568a | 1165 | elf_fake_sections (abfd, asect, ignore) |
1c6042ee ILT |
1166 | bfd *abfd; |
1167 | asection *asect; | |
fa15568a | 1168 | PTR ignore; |
32090b8e | 1169 | { |
32090b8e | 1170 | Elf_Internal_Shdr *this_hdr; |
fa15568a | 1171 | |
32090b8e | 1172 | this_hdr = &elf_section_data (asect)->this_hdr; |
fa15568a ILT |
1173 | |
1174 | this_hdr->sh_name = bfd_add_to_strtab (abfd, elf_shstrtab (abfd), | |
1175 | asect->name); | |
6ec3bb6a ILT |
1176 | if (this_hdr->sh_name == (unsigned long) -1) |
1177 | abort (); /* FIXME */ | |
fa15568a ILT |
1178 | |
1179 | this_hdr->sh_flags = 0; | |
1180 | if ((asect->flags & SEC_ALLOC) != 0) | |
1181 | this_hdr->sh_addr = asect->vma; | |
1182 | else | |
1183 | this_hdr->sh_addr = 0; | |
1184 | this_hdr->sh_offset = 0; | |
1185 | this_hdr->sh_size = asect->_raw_size; | |
1186 | this_hdr->sh_link = 0; | |
1187 | this_hdr->sh_info = 0; | |
32090b8e | 1188 | this_hdr->sh_addralign = 1 << asect->alignment_power; |
fa15568a ILT |
1189 | this_hdr->sh_entsize = 0; |
1190 | ||
1191 | this_hdr->rawdata = (PTR) asect; | |
1192 | this_hdr->contents = NULL; | |
1193 | this_hdr->size = 0; | |
013dec1a ILT |
1194 | |
1195 | /* FIXME: This should not be based on section names. */ | |
1196 | if (strcmp (asect->name, ".dynstr") == 0) | |
1197 | this_hdr->sh_type = SHT_STRTAB; | |
1198 | else if (strcmp (asect->name, ".hash") == 0) | |
fa15568a ILT |
1199 | { |
1200 | this_hdr->sh_type = SHT_HASH; | |
1201 | this_hdr->sh_entsize = ARCH_SIZE / 8; | |
1202 | } | |
013dec1a | 1203 | else if (strcmp (asect->name, ".dynsym") == 0) |
fa15568a ILT |
1204 | { |
1205 | this_hdr->sh_type = SHT_DYNSYM; | |
1206 | this_hdr->sh_entsize = sizeof (Elf_External_Sym); | |
1207 | } | |
013dec1a | 1208 | else if (strcmp (asect->name, ".dynamic") == 0) |
fa15568a ILT |
1209 | { |
1210 | this_hdr->sh_type = SHT_DYNAMIC; | |
1211 | this_hdr->sh_entsize = sizeof (Elf_External_Dyn); | |
1212 | } | |
0822b56d ILT |
1213 | else if (strncmp (asect->name, ".rela", 5) == 0 |
1214 | && get_elf_backend_data (abfd)->use_rela_p) | |
fa15568a ILT |
1215 | { |
1216 | this_hdr->sh_type = SHT_RELA; | |
1217 | this_hdr->sh_entsize = sizeof (Elf_External_Rela); | |
1218 | } | |
0822b56d ILT |
1219 | else if (strncmp (asect->name, ".rel", 4) == 0 |
1220 | && ! get_elf_backend_data (abfd)->use_rela_p) | |
1221 | { | |
1222 | this_hdr->sh_type = SHT_REL; | |
1223 | this_hdr->sh_entsize = sizeof (Elf_External_Rel); | |
1224 | } | |
fa15568a ILT |
1225 | else if (strcmp (asect->name, ".note") == 0) |
1226 | this_hdr->sh_type = SHT_NOTE; | |
1227 | else if (strncmp (asect->name, ".stab", 5) == 0 | |
1228 | && strcmp (asect->name + strlen (asect->name) - 3, "str") == 0) | |
1229 | this_hdr->sh_type = SHT_STRTAB; | |
1230 | else if ((asect->flags & SEC_ALLOC) != 0 | |
1231 | && (asect->flags & SEC_LOAD) != 0) | |
32090b8e | 1232 | this_hdr->sh_type = SHT_PROGBITS; |
fa15568a ILT |
1233 | else if ((asect->flags & SEC_ALLOC) != 0 |
1234 | && ((asect->flags & SEC_LOAD) == 0)) | |
e621c5cc | 1235 | { |
6c35a16d ILT |
1236 | BFD_ASSERT (strcmp (asect->name, ".bss") == 0 |
1237 | || strcmp (asect->name, ".sbss") == 0); | |
e621c5cc ILT |
1238 | this_hdr->sh_type = SHT_NOBITS; |
1239 | } | |
32090b8e | 1240 | else |
fa15568a ILT |
1241 | { |
1242 | /* Who knows? */ | |
1243 | this_hdr->sh_type = SHT_PROGBITS; | |
1244 | } | |
32090b8e | 1245 | |
fa15568a ILT |
1246 | if ((asect->flags & SEC_ALLOC) != 0) |
1247 | this_hdr->sh_flags |= SHF_ALLOC; | |
1248 | if ((asect->flags & SEC_READONLY) == 0) | |
1249 | this_hdr->sh_flags |= SHF_WRITE; | |
1250 | if ((asect->flags & SEC_CODE) != 0) | |
1251 | this_hdr->sh_flags |= SHF_EXECINSTR; | |
244ffee7 | 1252 | |
fa15568a | 1253 | /* Check for processor-specific section types. */ |
f035cc47 ILT |
1254 | { |
1255 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
1256 | ||
1257 | if (bed->elf_backend_fake_sections) | |
1258 | (*bed->elf_backend_fake_sections) (abfd, this_hdr, asect); | |
1259 | } | |
1260 | ||
fa15568a ILT |
1261 | /* If the section has relocs, set up a section header for the |
1262 | SHT_REL[A] section. */ | |
1263 | if ((asect->flags & SEC_RELOC) != 0) | |
1264 | { | |
1265 | Elf_Internal_Shdr *rela_hdr; | |
1266 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; | |
244ffee7 | 1267 | |
fa15568a ILT |
1268 | rela_hdr = &elf_section_data (asect)->rel_hdr; |
1269 | rela_hdr->sh_name = | |
1270 | bfd_add_2_to_strtab (abfd, elf_shstrtab (abfd), | |
1271 | use_rela_p ? ".rela" : ".rel", | |
1272 | asect->name); | |
1273 | rela_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL; | |
1274 | rela_hdr->sh_entsize = (use_rela_p | |
1275 | ? sizeof (Elf_External_Rela) | |
1276 | : sizeof (Elf_External_Rel)); | |
1277 | rela_hdr->sh_addralign = FILE_ALIGN; | |
1278 | rela_hdr->sh_flags = 0; | |
1279 | rela_hdr->sh_addr = 0; | |
1280 | rela_hdr->sh_size = 0; | |
1281 | rela_hdr->sh_offset = 0; | |
1282 | rela_hdr->size = 0; | |
1283 | } | |
1284 | } | |
244ffee7 | 1285 | |
fa15568a ILT |
1286 | /* Assign all ELF section numbers. The dummy first section is handled here |
1287 | too. The link/info pointers for the standard section types are filled | |
e6667b2b | 1288 | in here too, while we're at it. */ |
244ffee7 | 1289 | |
fa15568a ILT |
1290 | static boolean |
1291 | assign_section_numbers (abfd) | |
1292 | bfd *abfd; | |
1293 | { | |
1294 | struct elf_obj_tdata *t = elf_tdata (abfd); | |
1295 | asection *sec; | |
1296 | unsigned int section_number; | |
1297 | Elf_Internal_Shdr **i_shdrp; | |
1298 | ||
1299 | section_number = 1; | |
1300 | ||
fa15568a ILT |
1301 | for (sec = abfd->sections; sec; sec = sec->next) |
1302 | { | |
1303 | struct bfd_elf_section_data *d = elf_section_data (sec); | |
1304 | ||
1305 | d->this_idx = section_number++; | |
1306 | if ((sec->flags & SEC_RELOC) == 0) | |
1307 | d->rel_idx = 0; | |
1308 | else | |
1309 | d->rel_idx = section_number++; | |
1310 | } | |
1311 | ||
7c726b66 ILT |
1312 | t->shstrtab_section = section_number++; |
1313 | elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section; | |
1314 | t->shstrtab_hdr.sh_size = elf_shstrtab (abfd)->length; | |
1315 | t->shstrtab_hdr.contents = (PTR) elf_shstrtab (abfd)->tab; | |
1316 | ||
1317 | if (abfd->symcount > 0) | |
1318 | { | |
1319 | t->symtab_section = section_number++; | |
1320 | t->strtab_section = section_number++; | |
1321 | } | |
1322 | ||
fa15568a ILT |
1323 | elf_elfheader (abfd)->e_shnum = section_number; |
1324 | ||
1325 | /* Set up the list of section header pointers, in agreement with the | |
1326 | indices. */ | |
1327 | i_shdrp = ((Elf_Internal_Shdr **) | |
1328 | bfd_alloc (abfd, section_number * sizeof (Elf_Internal_Shdr *))); | |
1329 | if (i_shdrp == NULL) | |
1330 | { | |
1331 | bfd_set_error (bfd_error_no_memory); | |
1332 | return false; | |
1333 | } | |
1334 | ||
1335 | i_shdrp[0] = ((Elf_Internal_Shdr *) | |
1336 | bfd_alloc (abfd, sizeof (Elf_Internal_Shdr))); | |
1337 | if (i_shdrp[0] == NULL) | |
1338 | { | |
1339 | bfd_release (abfd, i_shdrp); | |
1340 | bfd_set_error (bfd_error_no_memory); | |
1341 | return false; | |
1342 | } | |
1343 | memset (i_shdrp[0], 0, sizeof (Elf_Internal_Shdr)); | |
1344 | ||
1345 | elf_elfsections (abfd) = i_shdrp; | |
1346 | ||
1347 | i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr; | |
1348 | if (abfd->symcount > 0) | |
1349 | { | |
1350 | i_shdrp[t->symtab_section] = &t->symtab_hdr; | |
1351 | i_shdrp[t->strtab_section] = &t->strtab_hdr; | |
1352 | t->symtab_hdr.sh_link = t->strtab_section; | |
1353 | } | |
1354 | for (sec = abfd->sections; sec; sec = sec->next) | |
32090b8e | 1355 | { |
fa15568a ILT |
1356 | struct bfd_elf_section_data *d = elf_section_data (sec); |
1357 | asection *s; | |
1358 | const char *name; | |
1359 | ||
1360 | i_shdrp[d->this_idx] = &d->this_hdr; | |
1361 | if (d->rel_idx != 0) | |
1362 | i_shdrp[d->rel_idx] = &d->rel_hdr; | |
1363 | ||
1364 | /* Fill in the sh_link and sh_info fields while we're at it. */ | |
1365 | ||
1366 | /* sh_link of a reloc section is the section index of the symbol | |
1367 | table. sh_info is the section index of the section to which | |
1368 | the relocation entries apply. */ | |
1369 | if (d->rel_idx != 0) | |
1370 | { | |
1371 | d->rel_hdr.sh_link = t->symtab_section; | |
1372 | d->rel_hdr.sh_info = d->this_idx; | |
1373 | } | |
1374 | ||
1375 | switch (d->this_hdr.sh_type) | |
32090b8e | 1376 | { |
fa15568a ILT |
1377 | case SHT_REL: |
1378 | case SHT_RELA: | |
1379 | /* A reloc section which we are treating as a normal BFD | |
1380 | section. sh_link is the section index of the symbol | |
1381 | table. sh_info is the section index of the section to | |
1382 | which the relocation entries apply. We assume that an | |
1383 | allocated reloc section uses the dynamic symbol table. | |
1384 | FIXME: How can we be sure? */ | |
1385 | s = bfd_get_section_by_name (abfd, ".dynsym"); | |
1386 | if (s != NULL) | |
1387 | d->this_hdr.sh_link = elf_section_data (s)->this_idx; | |
1388 | ||
1389 | /* We look up the section the relocs apply to by name. */ | |
1390 | name = sec->name; | |
1391 | if (d->this_hdr.sh_type == SHT_REL) | |
1392 | name += 4; | |
1393 | else | |
1394 | name += 5; | |
1395 | s = bfd_get_section_by_name (abfd, name); | |
1396 | if (s != NULL) | |
1397 | d->this_hdr.sh_info = elf_section_data (s)->this_idx; | |
1398 | break; | |
1399 | ||
1400 | case SHT_STRTAB: | |
1401 | /* We assume that a section named .stab*str is a stabs | |
1402 | string section. We look for a section with the same name | |
1403 | but without the trailing ``str'', and set its sh_link | |
1404 | field to point to this section. */ | |
1405 | if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0 | |
1406 | && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0) | |
1407 | { | |
1408 | size_t len; | |
1409 | char *alc; | |
1410 | ||
1411 | len = strlen (sec->name); | |
1412 | alc = (char *) malloc (len - 2); | |
1413 | if (alc == NULL) | |
1414 | { | |
1415 | bfd_set_error (bfd_error_no_memory); | |
1416 | return false; | |
1417 | } | |
1418 | strncpy (alc, sec->name, len - 3); | |
1419 | alc[len - 3] = '\0'; | |
1420 | s = bfd_get_section_by_name (abfd, alc); | |
1421 | free (alc); | |
1422 | if (s != NULL) | |
1423 | { | |
1424 | elf_section_data (s)->this_hdr.sh_link = d->this_idx; | |
1425 | ||
1426 | /* This is a .stab section. */ | |
1427 | elf_section_data (s)->this_hdr.sh_entsize = | |
1428 | 4 + 2 * (ARCH_SIZE / 8); | |
1429 | } | |
1430 | } | |
1431 | break; | |
1432 | ||
1433 | case SHT_DYNAMIC: | |
1434 | case SHT_DYNSYM: | |
1435 | /* sh_link is the section header index of the string table | |
1436 | used for the dynamic entries or symbol table. */ | |
1437 | s = bfd_get_section_by_name (abfd, ".dynstr"); | |
1438 | if (s != NULL) | |
1439 | d->this_hdr.sh_link = elf_section_data (s)->this_idx; | |
1440 | break; | |
1441 | ||
1442 | case SHT_HASH: | |
1443 | /* sh_link is the section header index of the symbol table | |
1444 | this hash table is for. */ | |
1445 | s = bfd_get_section_by_name (abfd, ".dynsym"); | |
1446 | if (s != NULL) | |
1447 | d->this_hdr.sh_link = elf_section_data (s)->this_idx; | |
1448 | break; | |
32090b8e KR |
1449 | } |
1450 | } | |
fa15568a ILT |
1451 | |
1452 | return true; | |
244ffee7 JK |
1453 | } |
1454 | ||
32090b8e KR |
1455 | /* Map symbol from it's internal number to the external number, moving |
1456 | all local symbols to be at the head of the list. */ | |
244ffee7 | 1457 | |
32090b8e | 1458 | static INLINE int |
062189c6 ILT |
1459 | sym_is_global (abfd, sym) |
1460 | bfd *abfd; | |
32090b8e KR |
1461 | asymbol *sym; |
1462 | { | |
062189c6 ILT |
1463 | /* If the backend has a special mapping, use it. */ |
1464 | if (get_elf_backend_data (abfd)->elf_backend_sym_is_global) | |
1465 | return ((*get_elf_backend_data (abfd)->elf_backend_sym_is_global) | |
1466 | (abfd, sym)); | |
1467 | ||
d24928c0 | 1468 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) |
244ffee7 | 1469 | { |
32090b8e KR |
1470 | if (sym->flags & BSF_LOCAL) |
1471 | abort (); | |
1472 | return 1; | |
244ffee7 | 1473 | } |
d24928c0 KR |
1474 | if (sym->section == 0) |
1475 | { | |
1476 | /* Is this valid? */ | |
1477 | abort (); | |
1478 | ||
1479 | return 1; | |
1480 | } | |
badd23e3 | 1481 | if (bfd_is_und_section (sym->section)) |
32090b8e KR |
1482 | return 1; |
1483 | if (bfd_is_com_section (sym->section)) | |
1484 | return 1; | |
1485 | if (sym->flags & (BSF_LOCAL | BSF_SECTION_SYM | BSF_FILE)) | |
1486 | return 0; | |
1487 | return 0; | |
1488 | } | |
244ffee7 | 1489 | |
9783e04a | 1490 | static boolean |
1c6042ee ILT |
1491 | elf_map_symbols (abfd) |
1492 | bfd *abfd; | |
32090b8e KR |
1493 | { |
1494 | int symcount = bfd_get_symcount (abfd); | |
1495 | asymbol **syms = bfd_get_outsymbols (abfd); | |
d24928c0 | 1496 | asymbol **sect_syms; |
32090b8e KR |
1497 | int num_locals = 0; |
1498 | int num_globals = 0; | |
1499 | int num_locals2 = 0; | |
1500 | int num_globals2 = 0; | |
d24928c0 | 1501 | int max_index = 0; |
32090b8e | 1502 | int num_sections = 0; |
d24928c0 | 1503 | Elf_Sym_Extra *sym_extra; |
32090b8e KR |
1504 | int idx; |
1505 | asection *asect; | |
6a3eb9b6 | 1506 | |
32090b8e KR |
1507 | #ifdef DEBUG |
1508 | fprintf (stderr, "elf_map_symbols\n"); | |
1509 | fflush (stderr); | |
1510 | #endif | |
244ffee7 | 1511 | |
e621c5cc ILT |
1512 | /* Add local symbols for each section for which there are relocs. |
1513 | FIXME: How can we tell which sections have relocs at this point? | |
1514 | Will reloc_count always be accurate? Actually, I think most ELF | |
1515 | targets create section symbols for all sections anyhow. */ | |
32090b8e | 1516 | for (asect = abfd->sections; asect; asect = asect->next) |
244ffee7 | 1517 | { |
d24928c0 KR |
1518 | if (max_index < asect->index) |
1519 | max_index = asect->index; | |
244ffee7 JK |
1520 | } |
1521 | ||
d24928c0 KR |
1522 | max_index++; |
1523 | elf_num_section_syms (abfd) = max_index; | |
1524 | sect_syms = (asymbol **) bfd_zalloc (abfd, max_index * sizeof (asymbol *)); | |
1525 | elf_section_syms (abfd) = sect_syms; | |
1526 | ||
5e829a34 | 1527 | if (sect_syms == 0) |
9783e04a | 1528 | { |
d1ad85a6 | 1529 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
1530 | return false; |
1531 | } | |
d24928c0 KR |
1532 | |
1533 | for (asect = abfd->sections; asect; asect = asect->next) | |
e621c5cc ILT |
1534 | { |
1535 | asymbol *sym = bfd_make_empty_symbol (abfd); | |
9783e04a DM |
1536 | if (!sym) |
1537 | { | |
d1ad85a6 | 1538 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
1539 | return false; |
1540 | } | |
e621c5cc ILT |
1541 | sym->the_bfd = abfd; |
1542 | sym->name = asect->name; | |
1543 | sym->value = asect->vma; | |
1544 | sym->flags = BSF_SECTION_SYM; | |
1545 | sym->section = asect; | |
1546 | sect_syms[asect->index] = sym; | |
1547 | num_sections++; | |
d24928c0 | 1548 | #ifdef DEBUG |
e621c5cc ILT |
1549 | fprintf (stderr, |
1550 | "creating section symbol, name = %s, value = 0x%.8lx, index = %d, section = 0x%.8lx\n", | |
1551 | asect->name, (long) asect->vma, asect->index, (long) asect); | |
d24928c0 | 1552 | #endif |
e621c5cc | 1553 | } |
d24928c0 | 1554 | |
32090b8e | 1555 | if (num_sections) |
244ffee7 | 1556 | { |
32090b8e KR |
1557 | if (syms) |
1558 | syms = (asymbol **) bfd_realloc (abfd, syms, | |
1559 | ((symcount + num_sections + 1) | |
1560 | * sizeof (asymbol *))); | |
1561 | else | |
1562 | syms = (asymbol **) bfd_alloc (abfd, | |
1c6042ee | 1563 | (num_sections + 1) * sizeof (asymbol *)); |
9783e04a DM |
1564 | if (!syms) |
1565 | { | |
d1ad85a6 | 1566 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
1567 | return false; |
1568 | } | |
244ffee7 | 1569 | |
32090b8e KR |
1570 | for (asect = abfd->sections; asect; asect = asect->next) |
1571 | { | |
d24928c0 KR |
1572 | if (sect_syms[asect->index]) |
1573 | syms[symcount++] = sect_syms[asect->index]; | |
32090b8e | 1574 | } |
244ffee7 | 1575 | |
32090b8e KR |
1576 | syms[symcount] = (asymbol *) 0; |
1577 | bfd_set_symtab (abfd, syms, symcount); | |
1578 | } | |
244ffee7 | 1579 | |
d24928c0 KR |
1580 | elf_sym_extra (abfd) = sym_extra |
1581 | = (Elf_Sym_Extra *) bfd_alloc (abfd, symcount * sizeof (Elf_Sym_Extra)); | |
9783e04a DM |
1582 | if (!sym_extra) |
1583 | { | |
d1ad85a6 | 1584 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
1585 | return false; |
1586 | } | |
244ffee7 | 1587 | |
32090b8e KR |
1588 | /* Identify and classify all of the symbols. */ |
1589 | for (idx = 0; idx < symcount; idx++) | |
244ffee7 | 1590 | { |
062189c6 | 1591 | if (!sym_is_global (abfd, syms[idx])) |
32090b8e KR |
1592 | num_locals++; |
1593 | else | |
1594 | num_globals++; | |
244ffee7 | 1595 | } |
32090b8e KR |
1596 | |
1597 | /* Now provide mapping information. Add +1 for skipping over the | |
1598 | dummy symbol. */ | |
1599 | for (idx = 0; idx < symcount; idx++) | |
244ffee7 | 1600 | { |
1c6042ee | 1601 | syms[idx]->udata = (PTR) & sym_extra[idx]; |
062189c6 | 1602 | if (!sym_is_global (abfd, syms[idx])) |
d24928c0 | 1603 | sym_extra[idx].elf_sym_num = 1 + num_locals2++; |
32090b8e | 1604 | else |
d24928c0 | 1605 | sym_extra[idx].elf_sym_num = 1 + num_locals + num_globals2++; |
244ffee7 JK |
1606 | } |
1607 | ||
32090b8e KR |
1608 | elf_num_locals (abfd) = num_locals; |
1609 | elf_num_globals (abfd) = num_globals; | |
9783e04a | 1610 | return true; |
32090b8e | 1611 | } |
244ffee7 | 1612 | |
6ec3bb6a ILT |
1613 | /* Compute the file positions we are going to put the sections at, and |
1614 | otherwise prepare to begin writing out the ELF file. If LINK_INFO | |
1615 | is not NULL, this is being called by the ELF backend linker. */ | |
244ffee7 | 1616 | |
32090b8e | 1617 | static boolean |
6ec3bb6a | 1618 | elf_compute_section_file_positions (abfd, link_info) |
1c6042ee | 1619 | bfd *abfd; |
6ec3bb6a | 1620 | struct bfd_link_info *link_info; |
32090b8e | 1621 | { |
6ec3bb6a ILT |
1622 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
1623 | Elf_Internal_Shdr *shstrtab_hdr; | |
1624 | ||
1625 | if (abfd->output_has_begun) | |
1626 | return true; | |
1627 | ||
1628 | /* Do any elf backend specific processing first. */ | |
1629 | if (bed->elf_backend_begin_write_processing) | |
71edd06d | 1630 | (*bed->elf_backend_begin_write_processing) (abfd, link_info); |
6ec3bb6a ILT |
1631 | |
1632 | if (! prep_headers (abfd)) | |
1633 | return false; | |
1634 | ||
32090b8e | 1635 | bfd_map_over_sections (abfd, elf_fake_sections, 0); |
244ffee7 | 1636 | |
9783e04a DM |
1637 | if (!assign_section_numbers (abfd)) |
1638 | return false; | |
244ffee7 | 1639 | |
6ec3bb6a ILT |
1640 | /* The backend linker builds symbol table information itself. */ |
1641 | if (link_info == NULL) | |
1642 | { | |
1643 | if (! swap_out_syms (abfd)) | |
1644 | return false; | |
1645 | } | |
244ffee7 | 1646 | |
6ec3bb6a ILT |
1647 | shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr; |
1648 | /* sh_name was set in prep_headers. */ | |
1649 | shstrtab_hdr->sh_type = SHT_STRTAB; | |
1650 | shstrtab_hdr->sh_flags = 0; | |
1651 | shstrtab_hdr->sh_addr = 0; | |
1652 | shstrtab_hdr->sh_size = elf_shstrtab (abfd)->length; | |
1653 | shstrtab_hdr->sh_entsize = 0; | |
1654 | shstrtab_hdr->sh_link = 0; | |
1655 | shstrtab_hdr->sh_info = 0; | |
1656 | /* sh_offset is set in assign_file_positions_for_symtabs_and_strtabs. */ | |
1657 | shstrtab_hdr->sh_addralign = 1; | |
1658 | shstrtab_hdr->contents = (PTR) elf_shstrtab (abfd)->tab; | |
1659 | ||
1660 | if (!assign_file_positions_except_relocs (abfd, | |
1661 | link_info == NULL ? true : false)) | |
9783e04a | 1662 | return false; |
32090b8e | 1663 | |
6ec3bb6a ILT |
1664 | abfd->output_has_begun = true; |
1665 | ||
32090b8e KR |
1666 | return true; |
1667 | } | |
1668 | ||
244ffee7 | 1669 | |
013dec1a ILT |
1670 | /* Align to the maximum file alignment that could be required for any |
1671 | ELF data structure. */ | |
1672 | ||
1673 | static INLINE file_ptr | |
1674 | align_file_position (off) | |
1675 | file_ptr off; | |
1676 | { | |
1677 | return (off + FILE_ALIGN - 1) & ~(FILE_ALIGN - 1); | |
1678 | } | |
1679 | ||
1680 | /* Assign a file position to a section, optionally aligning to the | |
1681 | required section alignment. */ | |
1682 | ||
32090b8e | 1683 | static INLINE file_ptr |
013dec1a | 1684 | assign_file_position_for_section (i_shdrp, offset, align) |
32090b8e KR |
1685 | Elf_Internal_Shdr *i_shdrp; |
1686 | file_ptr offset; | |
013dec1a | 1687 | boolean align; |
32090b8e | 1688 | { |
013dec1a ILT |
1689 | if (align) |
1690 | { | |
1691 | unsigned int al; | |
f035cc47 | 1692 | |
013dec1a ILT |
1693 | al = i_shdrp->sh_addralign; |
1694 | if (al > 1) | |
1695 | offset = BFD_ALIGN (offset, al); | |
1696 | } | |
1697 | i_shdrp->sh_offset = offset; | |
7b8106b4 ILT |
1698 | if (i_shdrp->rawdata != NULL) |
1699 | ((asection *) i_shdrp->rawdata)->filepos = offset; | |
300adb31 KR |
1700 | if (i_shdrp->sh_type != SHT_NOBITS) |
1701 | offset += i_shdrp->sh_size; | |
32090b8e | 1702 | return offset; |
244ffee7 JK |
1703 | } |
1704 | ||
013dec1a ILT |
1705 | /* Get the size of the program header. This is called by the linker |
1706 | before any of the section VMA's are set, so it can't calculate the | |
1707 | correct value for a strange memory layout. */ | |
01383fb4 | 1708 | |
013dec1a ILT |
1709 | static bfd_size_type |
1710 | get_program_header_size (abfd) | |
300adb31 | 1711 | bfd *abfd; |
300adb31 | 1712 | { |
013dec1a ILT |
1713 | size_t segs; |
1714 | asection *s; | |
300adb31 | 1715 | |
013dec1a ILT |
1716 | /* Assume we will need exactly two PT_LOAD segments: one for text |
1717 | and one for data. */ | |
1718 | segs = 2; | |
1719 | ||
1720 | s = bfd_get_section_by_name (abfd, ".interp"); | |
1721 | if (s != NULL && (s->flags & SEC_LOAD) != 0) | |
1722 | { | |
1723 | /* If we have a loadable interpreter section, we need a | |
1724 | PT_INTERP segment. In this case, assume we also need a | |
1725 | PT_PHDR segment, although that may not be true for all | |
1726 | targets. */ | |
1727 | segs += 2; | |
1728 | } | |
1729 | ||
1730 | if (bfd_get_section_by_name (abfd, ".dynamic") != NULL) | |
1731 | { | |
1732 | /* We need a PT_DYNAMIC segment. */ | |
1733 | ++segs; | |
1734 | } | |
1735 | ||
1736 | return segs * sizeof (Elf_External_Phdr); | |
300adb31 KR |
1737 | } |
1738 | ||
013dec1a ILT |
1739 | /* Create the program header. OFF is the file offset where the |
1740 | program header should be written. FIRST is the first loadable ELF | |
1741 | section. PHDR_SIZE is the size of the program header as returned | |
1742 | by get_program_header_size. */ | |
300adb31 | 1743 | |
013dec1a ILT |
1744 | static file_ptr |
1745 | map_program_segments (abfd, off, first, phdr_size) | |
300adb31 | 1746 | bfd *abfd; |
013dec1a ILT |
1747 | file_ptr off; |
1748 | Elf_Internal_Shdr *first; | |
1749 | bfd_size_type phdr_size; | |
300adb31 | 1750 | { |
6731b89c | 1751 | Elf_Internal_Phdr phdrs[10]; |
013dec1a | 1752 | unsigned int phdr_count; |
300adb31 | 1753 | Elf_Internal_Phdr *phdr; |
013dec1a ILT |
1754 | int phdr_size_adjust; |
1755 | unsigned int i; | |
1756 | Elf_Internal_Shdr **hdrpp; | |
1757 | asection *sinterp, *sdyn; | |
1758 | unsigned int last_type; | |
1759 | Elf_Internal_Ehdr *i_ehdrp; | |
1760 | ||
df9e066f | 1761 | BFD_ASSERT ((abfd->flags & (EXEC_P | DYNAMIC)) != 0); |
6731b89c ILT |
1762 | BFD_ASSERT (phdr_size / sizeof (Elf_Internal_Phdr) |
1763 | <= sizeof phdrs / sizeof (phdrs[0])); | |
013dec1a ILT |
1764 | |
1765 | phdr_count = 0; | |
1766 | phdr = phdrs; | |
1767 | ||
1768 | phdr_size_adjust = 0; | |
300adb31 | 1769 | |
013dec1a ILT |
1770 | /* If we have a loadable .interp section, we must create a PT_INTERP |
1771 | segment which must precede all PT_LOAD segments. We assume that | |
1772 | we must also create a PT_PHDR segment, although that may not be | |
1773 | true for all targets. */ | |
1774 | sinterp = bfd_get_section_by_name (abfd, ".interp"); | |
1775 | if (sinterp != NULL && (sinterp->flags & SEC_LOAD) != 0) | |
80425e6c | 1776 | { |
013dec1a ILT |
1777 | BFD_ASSERT (first != NULL); |
1778 | ||
1779 | phdr->p_type = PT_PHDR; | |
1780 | ||
1781 | phdr->p_offset = off; | |
1782 | ||
1783 | /* Account for any adjustment made because of the alignment of | |
1784 | the first loadable section. */ | |
1785 | phdr_size_adjust = (first->sh_offset - phdr_size) - off; | |
1786 | BFD_ASSERT (phdr_size_adjust >= 0 && phdr_size_adjust < 128); | |
1787 | ||
1788 | /* The program header precedes all loadable sections. This lets | |
1789 | us compute its loadable address. This depends on the linker | |
1790 | script. */ | |
1791 | phdr->p_vaddr = first->sh_addr - (phdr_size + phdr_size_adjust); | |
1792 | ||
1793 | phdr->p_paddr = 0; | |
1794 | phdr->p_filesz = phdr_size; | |
1795 | phdr->p_memsz = phdr_size; | |
1796 | ||
1797 | /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */ | |
1798 | phdr->p_flags = PF_R | PF_X; | |
1799 | ||
1800 | phdr->p_align = FILE_ALIGN; | |
1801 | BFD_ASSERT ((phdr->p_vaddr - phdr->p_offset) % FILE_ALIGN == 0); | |
1802 | ||
1803 | /* Include the ELF header in the first loadable segment. */ | |
1804 | phdr_size_adjust += off; | |
1805 | ||
1806 | ++phdr_count; | |
1807 | ++phdr; | |
1808 | ||
1809 | phdr->p_type = PT_INTERP; | |
1810 | phdr->p_offset = sinterp->filepos; | |
1811 | phdr->p_vaddr = sinterp->vma; | |
1812 | phdr->p_paddr = 0; | |
1813 | phdr->p_filesz = sinterp->_raw_size; | |
1814 | phdr->p_memsz = sinterp->_raw_size; | |
1815 | phdr->p_flags = PF_R; | |
1816 | phdr->p_align = 1 << bfd_get_section_alignment (abfd, sinterp); | |
1817 | ||
1818 | ++phdr_count; | |
1819 | ++phdr; | |
80425e6c | 1820 | } |
013dec1a ILT |
1821 | |
1822 | /* Look through the sections to see how they will be divided into | |
1823 | program segments. The sections must be arranged in order by | |
1824 | sh_addr for this to work correctly. */ | |
1825 | phdr->p_type = PT_NULL; | |
1826 | last_type = SHT_PROGBITS; | |
1827 | for (i = 1, hdrpp = elf_elfsections (abfd) + 1; | |
1828 | i < elf_elfheader (abfd)->e_shnum; | |
1829 | i++, hdrpp++) | |
300adb31 | 1830 | { |
013dec1a ILT |
1831 | Elf_Internal_Shdr *hdr; |
1832 | ||
1833 | hdr = *hdrpp; | |
1834 | ||
1835 | /* Ignore any section which will not be part of the process | |
1836 | image. */ | |
1837 | if ((hdr->sh_flags & SHF_ALLOC) == 0) | |
1838 | continue; | |
1839 | ||
1840 | /* If this section fits in the segment we are constructing, add | |
1841 | it in. */ | |
1842 | if (phdr->p_type != PT_NULL | |
1843 | && (hdr->sh_offset - (phdr->p_offset + phdr->p_memsz) | |
1844 | == hdr->sh_addr - (phdr->p_vaddr + phdr->p_memsz)) | |
1845 | && (last_type != SHT_NOBITS || hdr->sh_type == SHT_NOBITS)) | |
300adb31 | 1846 | { |
013dec1a ILT |
1847 | bfd_size_type adjust; |
1848 | ||
1849 | adjust = hdr->sh_addr - (phdr->p_vaddr + phdr->p_memsz); | |
1850 | phdr->p_memsz += hdr->sh_size + adjust; | |
1851 | if (hdr->sh_type != SHT_NOBITS) | |
1852 | phdr->p_filesz += hdr->sh_size + adjust; | |
1853 | if ((hdr->sh_flags & SHF_WRITE) != 0) | |
1854 | phdr->p_flags |= PF_W; | |
1855 | if ((hdr->sh_flags & SHF_EXECINSTR) != 0) | |
1856 | phdr->p_flags |= PF_X; | |
1857 | last_type = hdr->sh_type; | |
300adb31 KR |
1858 | continue; |
1859 | } | |
300adb31 | 1860 | |
013dec1a ILT |
1861 | /* If we have a segment, move to the next one. */ |
1862 | if (phdr->p_type != PT_NULL) | |
300adb31 | 1863 | { |
013dec1a ILT |
1864 | ++phdr; |
1865 | ++phdr_count; | |
300adb31 | 1866 | } |
013dec1a ILT |
1867 | |
1868 | /* Start a new segment. */ | |
1869 | phdr->p_type = PT_LOAD; | |
1870 | phdr->p_offset = hdr->sh_offset; | |
1871 | phdr->p_vaddr = hdr->sh_addr; | |
1872 | phdr->p_paddr = 0; | |
1873 | if (hdr->sh_type == SHT_NOBITS) | |
1874 | phdr->p_filesz = 0; | |
1875 | else | |
1876 | phdr->p_filesz = hdr->sh_size; | |
1877 | phdr->p_memsz = hdr->sh_size; | |
1878 | phdr->p_flags = PF_R; | |
1879 | if ((hdr->sh_flags & SHF_WRITE) != 0) | |
1880 | phdr->p_flags |= PF_W; | |
1881 | if ((hdr->sh_flags & SHF_EXECINSTR) != 0) | |
1882 | phdr->p_flags |= PF_X; | |
1883 | phdr->p_align = get_elf_backend_data (abfd)->maxpagesize; | |
1884 | ||
1885 | if (hdr == first | |
1886 | && sinterp != NULL | |
1887 | && (sinterp->flags & SEC_LOAD) != 0) | |
2f3189e7 | 1888 | { |
013dec1a ILT |
1889 | phdr->p_offset -= phdr_size + phdr_size_adjust; |
1890 | phdr->p_vaddr -= phdr_size + phdr_size_adjust; | |
1891 | phdr->p_filesz += phdr_size + phdr_size_adjust; | |
1892 | phdr->p_memsz += phdr_size + phdr_size_adjust; | |
2f3189e7 | 1893 | } |
300adb31 | 1894 | |
013dec1a | 1895 | last_type = hdr->sh_type; |
300adb31 | 1896 | } |
300adb31 | 1897 | |
013dec1a ILT |
1898 | if (phdr->p_type != PT_NULL) |
1899 | { | |
1900 | ++phdr; | |
1901 | ++phdr_count; | |
1902 | } | |
1903 | ||
1904 | /* If we have a .dynamic section, create a PT_DYNAMIC segment. */ | |
1905 | sdyn = bfd_get_section_by_name (abfd, ".dynamic"); | |
1906 | if (sdyn != NULL && (sdyn->flags & SEC_LOAD) != 0) | |
1907 | { | |
1908 | phdr->p_type = PT_DYNAMIC; | |
1909 | phdr->p_offset = sdyn->filepos; | |
1910 | phdr->p_vaddr = sdyn->vma; | |
1911 | phdr->p_paddr = 0; | |
1912 | phdr->p_filesz = sdyn->_raw_size; | |
1913 | phdr->p_memsz = sdyn->_raw_size; | |
1914 | phdr->p_flags = PF_R; | |
1915 | if ((sdyn->flags & SEC_READONLY) == 0) | |
1916 | phdr->p_flags |= PF_W; | |
1917 | if ((sdyn->flags & SEC_CODE) != 0) | |
1918 | phdr->p_flags |= PF_X; | |
1919 | phdr->p_align = 1 << bfd_get_section_alignment (abfd, sdyn); | |
1920 | ||
1921 | ++phdr; | |
1922 | ++phdr_count; | |
1923 | } | |
1924 | ||
013dec1a | 1925 | /* Make sure the return value from get_program_header_size matches |
57b40081 ILT |
1926 | what we computed here. Actually, it's OK if we allocated too |
1927 | much space in the program header. */ | |
1928 | if (phdr_count > phdr_size / sizeof (Elf_External_Phdr)) | |
013dec1a ILT |
1929 | abort (); |
1930 | ||
1931 | /* Set up program header information. */ | |
1932 | i_ehdrp = elf_elfheader (abfd); | |
1933 | i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr); | |
1934 | i_ehdrp->e_phoff = off; | |
1935 | i_ehdrp->e_phnum = phdr_count; | |
1936 | ||
1937 | /* Save the program headers away. I don't think anybody uses this | |
1938 | information right now. */ | |
1939 | elf_tdata (abfd)->phdr = ((Elf_Internal_Phdr *) | |
1940 | bfd_alloc (abfd, | |
1941 | (phdr_count | |
1942 | * sizeof (Elf_Internal_Phdr)))); | |
1943 | if (elf_tdata (abfd)->phdr == NULL && phdr_count != 0) | |
1944 | { | |
1945 | bfd_set_error (bfd_error_no_memory); | |
1946 | return (file_ptr) -1; | |
1947 | } | |
1948 | memcpy (elf_tdata (abfd)->phdr, phdrs, | |
1949 | phdr_count * sizeof (Elf_Internal_Phdr)); | |
1950 | ||
1951 | /* Write out the program headers. */ | |
1952 | if (bfd_seek (abfd, off, SEEK_SET) != 0) | |
1953 | return (file_ptr) -1; | |
1954 | ||
1955 | for (i = 0, phdr = phdrs; i < phdr_count; i++, phdr++) | |
1956 | { | |
1957 | Elf_External_Phdr extphdr; | |
1958 | ||
1959 | elf_swap_phdr_out (abfd, phdr, &extphdr); | |
1960 | if (bfd_write (&extphdr, sizeof (Elf_External_Phdr), 1, abfd) | |
1961 | != sizeof (Elf_External_Phdr)) | |
1962 | return (file_ptr) -1; | |
1963 | } | |
1964 | ||
1965 | return off + phdr_count * sizeof (Elf_External_Phdr); | |
300adb31 KR |
1966 | } |
1967 | ||
013dec1a ILT |
1968 | /* Work out the file positions of all the sections. This is called by |
1969 | elf_compute_section_file_positions. All the section sizes and VMAs | |
1970 | must be known before this is called. | |
1971 | ||
1972 | We do not consider reloc sections at this point, unless they form | |
1973 | part of the loadable image. Reloc sections are assigned file | |
1974 | positions in assign_file_positions_for_relocs, which is called by | |
1975 | write_object_contents and final_link. | |
1976 | ||
1977 | If DOSYMS is false, we do not assign file positions for the symbol | |
1978 | table or the string table. */ | |
1979 | ||
9783e04a | 1980 | static boolean |
6ec3bb6a | 1981 | assign_file_positions_except_relocs (abfd, dosyms) |
32090b8e | 1982 | bfd *abfd; |
6ec3bb6a | 1983 | boolean dosyms; |
244ffee7 | 1984 | { |
013dec1a ILT |
1985 | struct elf_obj_tdata * const tdata = elf_tdata (abfd); |
1986 | Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd); | |
1987 | Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd); | |
32090b8e | 1988 | file_ptr off; |
32090b8e | 1989 | |
013dec1a | 1990 | /* Start after the ELF header. */ |
32090b8e | 1991 | off = i_ehdrp->e_ehsize; |
300adb31 | 1992 | |
df9e066f | 1993 | if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0) |
300adb31 | 1994 | { |
013dec1a ILT |
1995 | Elf_Internal_Shdr **hdrpp; |
1996 | unsigned int i; | |
062189c6 | 1997 | |
013dec1a ILT |
1998 | /* We are not creating an executable, which means that we are |
1999 | not creating a program header, and that the actual order of | |
2000 | the sections in the file is unimportant. */ | |
2001 | for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++) | |
244ffee7 | 2002 | { |
013dec1a ILT |
2003 | Elf_Internal_Shdr *hdr; |
2004 | ||
2005 | hdr = *hdrpp; | |
2006 | if (hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA) | |
300adb31 | 2007 | { |
013dec1a | 2008 | hdr->sh_offset = -1; |
300adb31 KR |
2009 | continue; |
2010 | } | |
013dec1a ILT |
2011 | if (! dosyms |
2012 | && (i == tdata->symtab_section | |
2013 | || i == tdata->strtab_section)) | |
300adb31 | 2014 | { |
013dec1a ILT |
2015 | hdr->sh_offset = -1; |
2016 | continue; | |
300adb31 | 2017 | } |
013dec1a ILT |
2018 | |
2019 | off = assign_file_position_for_section (hdr, off, true); | |
300adb31 | 2020 | } |
300adb31 | 2021 | } |
013dec1a | 2022 | else |
300adb31 | 2023 | { |
013dec1a ILT |
2024 | file_ptr phdr_off; |
2025 | bfd_size_type phdr_size; | |
2026 | bfd_vma maxpagesize; | |
2027 | Elf_Internal_Shdr **hdrpp; | |
2028 | unsigned int i; | |
2029 | Elf_Internal_Shdr *first; | |
2030 | file_ptr phdr_map; | |
2031 | ||
2032 | /* We are creating an executable. We must create a program | |
2033 | header. We can't actually create the program header until we | |
2034 | have set the file positions for the sections, but we can | |
2035 | figure out how big it is going to be. */ | |
2036 | off = align_file_position (off); | |
2037 | phdr_size = get_program_header_size (abfd); | |
2038 | if (phdr_size == (file_ptr) -1) | |
9783e04a | 2039 | return false; |
013dec1a ILT |
2040 | phdr_off = off; |
2041 | off += phdr_size; | |
2042 | ||
2043 | maxpagesize = get_elf_backend_data (abfd)->maxpagesize; | |
2044 | if (maxpagesize == 0) | |
2045 | maxpagesize = 1; | |
2046 | ||
2047 | /* FIXME: We might want to sort the sections on the sh_addr | |
2048 | field here. For now, we just assume that the linker will | |
2049 | create the sections in an appropriate order. */ | |
2050 | ||
2051 | /* Assign file positions in two passes. In the first pass, we | |
2052 | assign a file position to every section which forms part of | |
2053 | the executable image. */ | |
2054 | first = NULL; | |
2055 | for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++) | |
2056 | { | |
2057 | Elf_Internal_Shdr *hdr; | |
300adb31 | 2058 | |
013dec1a ILT |
2059 | hdr = *hdrpp; |
2060 | if ((hdr->sh_flags & SHF_ALLOC) == 0) | |
2061 | continue; | |
2062 | ||
2063 | if (first == NULL) | |
2064 | first = hdr; | |
2065 | ||
64e21e0f KR |
2066 | /* The section VMA must equal the file position modulo the |
2067 | page size. This is required by the program header. */ | |
2068 | off += (hdr->sh_addr - off) % maxpagesize; | |
300adb31 | 2069 | |
013dec1a ILT |
2070 | off = assign_file_position_for_section (hdr, off, false); |
2071 | } | |
300adb31 | 2072 | |
013dec1a ILT |
2073 | /* Assign file positions to all the sections which do not form |
2074 | part of the loadable image, except for the relocs. */ | |
2075 | for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++) | |
300adb31 | 2076 | { |
013dec1a ILT |
2077 | Elf_Internal_Shdr *hdr; |
2078 | ||
2079 | hdr = *hdrpp; | |
2080 | if ((hdr->sh_flags & SHF_ALLOC) != 0) | |
2081 | continue; | |
2082 | if (hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA) | |
2083 | { | |
2084 | hdr->sh_offset = -1; | |
2085 | continue; | |
2086 | } | |
2087 | if (! dosyms | |
2088 | && (i == tdata->symtab_section | |
2089 | || i == tdata->strtab_section)) | |
2090 | { | |
2091 | hdr->sh_offset = -1; | |
2092 | continue; | |
2093 | } | |
2094 | ||
2095 | off = assign_file_position_for_section (hdr, off, true); | |
300adb31 | 2096 | } |
013dec1a ILT |
2097 | |
2098 | phdr_map = map_program_segments (abfd, phdr_off, first, phdr_size); | |
2099 | if (phdr_map == (file_ptr) -1) | |
2100 | return false; | |
0d9e1397 | 2101 | BFD_ASSERT (phdr_map <= phdr_off + phdr_size); |
244ffee7 | 2102 | } |
013dec1a ILT |
2103 | |
2104 | /* Place the section headers. */ | |
2105 | off = align_file_position (off); | |
2106 | i_ehdrp->e_shoff = off; | |
2107 | off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize; | |
2108 | ||
32090b8e | 2109 | elf_tdata (abfd)->next_file_pos = off; |
013dec1a | 2110 | |
9783e04a | 2111 | return true; |
244ffee7 JK |
2112 | } |
2113 | ||
32090b8e KR |
2114 | static boolean |
2115 | prep_headers (abfd) | |
2116 | bfd *abfd; | |
2117 | { | |
32090b8e | 2118 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ |
1c6042ee | 2119 | Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */ |
32090b8e | 2120 | Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ |
32090b8e | 2121 | int count; |
32090b8e | 2122 | struct strtab *shstrtab; |
244ffee7 | 2123 | |
32090b8e KR |
2124 | i_ehdrp = elf_elfheader (abfd); |
2125 | i_shdrp = elf_elfsections (abfd); | |
244ffee7 | 2126 | |
32090b8e | 2127 | shstrtab = bfd_new_strtab (abfd); |
b9d5cdf0 DM |
2128 | if (!shstrtab) |
2129 | return false; | |
1c6042ee | 2130 | |
32090b8e | 2131 | elf_shstrtab (abfd) = shstrtab; |
244ffee7 | 2132 | |
32090b8e KR |
2133 | i_ehdrp->e_ident[EI_MAG0] = ELFMAG0; |
2134 | i_ehdrp->e_ident[EI_MAG1] = ELFMAG1; | |
2135 | i_ehdrp->e_ident[EI_MAG2] = ELFMAG2; | |
2136 | i_ehdrp->e_ident[EI_MAG3] = ELFMAG3; | |
244ffee7 | 2137 | |
32090b8e KR |
2138 | i_ehdrp->e_ident[EI_CLASS] = ELFCLASS; |
2139 | i_ehdrp->e_ident[EI_DATA] = | |
2140 | abfd->xvec->byteorder_big_p ? ELFDATA2MSB : ELFDATA2LSB; | |
2141 | i_ehdrp->e_ident[EI_VERSION] = EV_CURRENT; | |
244ffee7 | 2142 | |
32090b8e KR |
2143 | for (count = EI_PAD; count < EI_NIDENT; count++) |
2144 | i_ehdrp->e_ident[count] = 0; | |
244ffee7 | 2145 | |
8af74670 ILT |
2146 | if ((abfd->flags & DYNAMIC) != 0) |
2147 | i_ehdrp->e_type = ET_DYN; | |
2148 | else if ((abfd->flags & EXEC_P) != 0) | |
2149 | i_ehdrp->e_type = ET_EXEC; | |
2150 | else | |
2151 | i_ehdrp->e_type = ET_REL; | |
2152 | ||
32090b8e | 2153 | switch (bfd_get_arch (abfd)) |
fce36137 | 2154 | { |
32090b8e KR |
2155 | case bfd_arch_unknown: |
2156 | i_ehdrp->e_machine = EM_NONE; | |
2157 | break; | |
2158 | case bfd_arch_sparc: | |
32090b8e KR |
2159 | #if ARCH_SIZE == 64 |
2160 | i_ehdrp->e_machine = EM_SPARC64; | |
5546cc7e KR |
2161 | #else |
2162 | i_ehdrp->e_machine = EM_SPARC; | |
32090b8e | 2163 | #endif |
32090b8e KR |
2164 | break; |
2165 | case bfd_arch_i386: | |
2166 | i_ehdrp->e_machine = EM_386; | |
2167 | break; | |
2168 | case bfd_arch_m68k: | |
2169 | i_ehdrp->e_machine = EM_68K; | |
2170 | break; | |
2171 | case bfd_arch_m88k: | |
2172 | i_ehdrp->e_machine = EM_88K; | |
2173 | break; | |
2174 | case bfd_arch_i860: | |
2175 | i_ehdrp->e_machine = EM_860; | |
2176 | break; | |
2177 | case bfd_arch_mips: /* MIPS Rxxxx */ | |
2178 | i_ehdrp->e_machine = EM_MIPS; /* only MIPS R3000 */ | |
2179 | break; | |
2180 | case bfd_arch_hppa: | |
459ae909 | 2181 | i_ehdrp->e_machine = EM_PARISC; |
32090b8e | 2182 | break; |
99ec1f66 ILT |
2183 | case bfd_arch_powerpc: |
2184 | i_ehdrp->e_machine = EM_CYGNUS_POWERPC; | |
2185 | break; | |
32090b8e KR |
2186 | /* also note that EM_M32, AT&T WE32100 is unknown to bfd */ |
2187 | default: | |
2188 | i_ehdrp->e_machine = EM_NONE; | |
fce36137 | 2189 | } |
32090b8e KR |
2190 | i_ehdrp->e_version = EV_CURRENT; |
2191 | i_ehdrp->e_ehsize = sizeof (Elf_External_Ehdr); | |
244ffee7 | 2192 | |
32090b8e KR |
2193 | /* no program header, for now. */ |
2194 | i_ehdrp->e_phoff = 0; | |
2195 | i_ehdrp->e_phentsize = 0; | |
2196 | i_ehdrp->e_phnum = 0; | |
244ffee7 | 2197 | |
32090b8e KR |
2198 | /* each bfd section is section header entry */ |
2199 | i_ehdrp->e_entry = bfd_get_start_address (abfd); | |
2200 | i_ehdrp->e_shentsize = sizeof (Elf_External_Shdr); | |
244ffee7 | 2201 | |
32090b8e KR |
2202 | /* if we're building an executable, we'll need a program header table */ |
2203 | if (abfd->flags & EXEC_P) | |
244ffee7 | 2204 | { |
300adb31 | 2205 | /* it all happens later */ |
32090b8e KR |
2206 | #if 0 |
2207 | i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr); | |
244ffee7 | 2208 | |
32090b8e KR |
2209 | /* elf_build_phdrs() returns a (NULL-terminated) array of |
2210 | Elf_Internal_Phdrs */ | |
2211 | i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum); | |
2212 | i_ehdrp->e_phoff = outbase; | |
2213 | outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum; | |
2214 | #endif | |
244ffee7 | 2215 | } |
32090b8e | 2216 | else |
244ffee7 | 2217 | { |
32090b8e KR |
2218 | i_ehdrp->e_phentsize = 0; |
2219 | i_phdrp = 0; | |
2220 | i_ehdrp->e_phoff = 0; | |
244ffee7 JK |
2221 | } |
2222 | ||
32090b8e KR |
2223 | elf_tdata (abfd)->symtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab, |
2224 | ".symtab"); | |
2225 | elf_tdata (abfd)->strtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab, | |
2226 | ".strtab"); | |
2227 | elf_tdata (abfd)->shstrtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab, | |
2228 | ".shstrtab"); | |
6ec3bb6a ILT |
2229 | if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1 |
2230 | || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1 | |
2231 | || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1) | |
2232 | return false; | |
2233 | ||
f035cc47 | 2234 | return true; |
244ffee7 JK |
2235 | } |
2236 | ||
b9d5cdf0 | 2237 | static boolean |
32090b8e KR |
2238 | swap_out_syms (abfd) |
2239 | bfd *abfd; | |
244ffee7 | 2240 | { |
9783e04a DM |
2241 | if (!elf_map_symbols (abfd)) |
2242 | return false; | |
244ffee7 | 2243 | |
32090b8e KR |
2244 | /* Dump out the symtabs. */ |
2245 | { | |
2246 | int symcount = bfd_get_symcount (abfd); | |
2247 | asymbol **syms = bfd_get_outsymbols (abfd); | |
2248 | struct strtab *stt = bfd_new_strtab (abfd); | |
2249 | Elf_Internal_Shdr *symtab_hdr; | |
2250 | Elf_Internal_Shdr *symstrtab_hdr; | |
2251 | Elf_External_Sym *outbound_syms; | |
2252 | int idx; | |
244ffee7 | 2253 | |
b9d5cdf0 DM |
2254 | if (!stt) |
2255 | return false; | |
32090b8e KR |
2256 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
2257 | symtab_hdr->sh_type = SHT_SYMTAB; | |
2258 | symtab_hdr->sh_entsize = sizeof (Elf_External_Sym); | |
2259 | symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1); | |
2260 | symtab_hdr->sh_info = elf_num_locals (abfd) + 1; | |
fa15568a | 2261 | symtab_hdr->sh_addralign = FILE_ALIGN; |
244ffee7 | 2262 | |
32090b8e KR |
2263 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; |
2264 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
244ffee7 | 2265 | |
32090b8e KR |
2266 | outbound_syms = (Elf_External_Sym *) |
2267 | bfd_alloc (abfd, (1 + symcount) * sizeof (Elf_External_Sym)); | |
9783e04a DM |
2268 | if (!outbound_syms) |
2269 | { | |
d1ad85a6 | 2270 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
2271 | return false; |
2272 | } | |
32090b8e KR |
2273 | /* now generate the data (for "contents") */ |
2274 | { | |
2275 | /* Fill in zeroth symbol and swap it out. */ | |
2276 | Elf_Internal_Sym sym; | |
2277 | sym.st_name = 0; | |
2278 | sym.st_value = 0; | |
2279 | sym.st_size = 0; | |
2280 | sym.st_info = 0; | |
2281 | sym.st_other = 0; | |
2282 | sym.st_shndx = SHN_UNDEF; | |
2283 | elf_swap_symbol_out (abfd, &sym, outbound_syms); | |
244ffee7 | 2284 | } |
32090b8e KR |
2285 | for (idx = 0; idx < symcount; idx++) |
2286 | { | |
2287 | Elf_Internal_Sym sym; | |
2288 | bfd_vma value = syms[idx]->value; | |
71edd06d | 2289 | elf_symbol_type *type_ptr; |
244ffee7 | 2290 | |
32090b8e KR |
2291 | if (syms[idx]->flags & BSF_SECTION_SYM) |
2292 | /* Section symbols have no names. */ | |
2293 | sym.st_name = 0; | |
2294 | else | |
6ec3bb6a ILT |
2295 | { |
2296 | sym.st_name = bfd_add_to_strtab (abfd, stt, syms[idx]->name); | |
2297 | if (sym.st_name == (unsigned long) -1) | |
2298 | return false; | |
2299 | } | |
244ffee7 | 2300 | |
71edd06d ILT |
2301 | type_ptr = elf_symbol_from (abfd, syms[idx]); |
2302 | ||
32090b8e | 2303 | if (bfd_is_com_section (syms[idx]->section)) |
244ffee7 | 2304 | { |
32090b8e KR |
2305 | /* ELF common symbols put the alignment into the `value' field, |
2306 | and the size into the `size' field. This is backwards from | |
2307 | how BFD handles it, so reverse it here. */ | |
2308 | sym.st_size = value; | |
71edd06d | 2309 | sym.st_value = type_ptr ? type_ptr->internal_elf_sym.st_value : 16; |
d4fb8fce ILT |
2310 | sym.st_shndx = elf_section_from_bfd_section (abfd, |
2311 | syms[idx]->section); | |
244ffee7 JK |
2312 | } |
2313 | else | |
2314 | { | |
32090b8e KR |
2315 | asection *sec = syms[idx]->section; |
2316 | int shndx; | |
244ffee7 | 2317 | |
32090b8e KR |
2318 | if (sec->output_section) |
2319 | { | |
2320 | value += sec->output_offset; | |
2321 | sec = sec->output_section; | |
2322 | } | |
2323 | value += sec->vma; | |
2324 | sym.st_value = value; | |
e74034d8 | 2325 | sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0; |
32090b8e KR |
2326 | sym.st_shndx = shndx = elf_section_from_bfd_section (abfd, sec); |
2327 | if (shndx == -1) | |
2328 | { | |
2329 | asection *sec2; | |
2330 | /* Writing this would be a hell of a lot easier if we had | |
2331 | some decent documentation on bfd, and knew what to expect | |
2332 | of the library, and what to demand of applications. For | |
2333 | example, it appears that `objcopy' might not set the | |
2334 | section of a symbol to be a section that is actually in | |
2335 | the output file. */ | |
2336 | sec2 = bfd_get_section_by_name (abfd, sec->name); | |
850584ad | 2337 | BFD_ASSERT (sec2 != 0); |
32090b8e | 2338 | sym.st_shndx = shndx = elf_section_from_bfd_section (abfd, sec2); |
850584ad | 2339 | BFD_ASSERT (shndx != -1); |
32090b8e KR |
2340 | } |
2341 | } | |
244ffee7 | 2342 | |
32090b8e | 2343 | if (bfd_is_com_section (syms[idx]->section)) |
38a5f510 | 2344 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_OBJECT); |
badd23e3 | 2345 | else if (bfd_is_und_section (syms[idx]->section)) |
3c9832f8 ILT |
2346 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, |
2347 | ((syms[idx]->flags & BSF_FUNCTION) | |
2348 | ? STT_FUNC | |
2349 | : STT_NOTYPE)); | |
32090b8e KR |
2350 | else if (syms[idx]->flags & BSF_SECTION_SYM) |
2351 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
2352 | else if (syms[idx]->flags & BSF_FILE) | |
2353 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
d24928c0 | 2354 | else |
32090b8e | 2355 | { |
d24928c0 KR |
2356 | int bind = STB_LOCAL; |
2357 | int type = STT_OBJECT; | |
2358 | unsigned int flags = syms[idx]->flags; | |
2359 | ||
2360 | if (flags & BSF_LOCAL) | |
2361 | bind = STB_LOCAL; | |
2362 | else if (flags & BSF_WEAK) | |
2363 | bind = STB_WEAK; | |
2364 | else if (flags & BSF_GLOBAL) | |
2365 | bind = STB_GLOBAL; | |
2366 | ||
2367 | if (flags & BSF_FUNCTION) | |
2368 | type = STT_FUNC; | |
2369 | ||
2370 | sym.st_info = ELF_ST_INFO (bind, type); | |
32090b8e | 2371 | } |
244ffee7 | 2372 | |
32090b8e KR |
2373 | sym.st_other = 0; |
2374 | elf_swap_symbol_out (abfd, &sym, | |
d24928c0 KR |
2375 | (outbound_syms |
2376 | + elf_sym_extra (abfd)[idx].elf_sym_num)); | |
32090b8e KR |
2377 | } |
2378 | ||
2379 | symtab_hdr->contents = (PTR) outbound_syms; | |
2380 | symstrtab_hdr->contents = (PTR) stt->tab; | |
2381 | symstrtab_hdr->sh_size = stt->length; | |
2382 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
2383 | ||
2384 | symstrtab_hdr->sh_flags = 0; | |
2385 | symstrtab_hdr->sh_addr = 0; | |
2386 | symstrtab_hdr->sh_entsize = 0; | |
2387 | symstrtab_hdr->sh_link = 0; | |
2388 | symstrtab_hdr->sh_info = 0; | |
062189c6 | 2389 | symstrtab_hdr->sh_addralign = 1; |
32090b8e KR |
2390 | symstrtab_hdr->size = 0; |
2391 | } | |
2392 | ||
b9d5cdf0 | 2393 | return true; |
244ffee7 JK |
2394 | } |
2395 | ||
32090b8e KR |
2396 | static boolean |
2397 | write_shdrs_and_ehdr (abfd) | |
2398 | bfd *abfd; | |
244ffee7 | 2399 | { |
32090b8e KR |
2400 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
2401 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
32090b8e KR |
2402 | Elf_External_Shdr *x_shdrp; /* Section header table, external form */ |
2403 | Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ | |
68241b2b | 2404 | unsigned int count; |
32090b8e | 2405 | struct strtab *shstrtab; |
244ffee7 | 2406 | |
32090b8e KR |
2407 | i_ehdrp = elf_elfheader (abfd); |
2408 | i_shdrp = elf_elfsections (abfd); | |
2409 | shstrtab = elf_shstrtab (abfd); | |
2410 | ||
2411 | /* swap the header before spitting it out... */ | |
2412 | ||
2413 | #if DEBUG & 1 | |
2414 | elf_debug_file (i_ehdrp); | |
244ffee7 | 2415 | #endif |
32090b8e | 2416 | elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr); |
4002f18a ILT |
2417 | if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 |
2418 | || (bfd_write ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) | |
2419 | != sizeof (x_ehdr))) | |
2420 | return false; | |
244ffee7 | 2421 | |
32090b8e KR |
2422 | /* at this point we've concocted all the ELF sections... */ |
2423 | x_shdrp = (Elf_External_Shdr *) | |
2424 | bfd_alloc (abfd, sizeof (*x_shdrp) * (i_ehdrp->e_shnum)); | |
2425 | if (!x_shdrp) | |
2426 | { | |
d1ad85a6 | 2427 | bfd_set_error (bfd_error_no_memory); |
32090b8e KR |
2428 | return false; |
2429 | } | |
2430 | ||
2431 | for (count = 0; count < i_ehdrp->e_shnum; count++) | |
2432 | { | |
2433 | #if DEBUG & 2 | |
2434 | elf_debug_section (shstrtab->tab + i_shdrp[count]->sh_name, count, | |
2435 | i_shdrp[count]); | |
244ffee7 | 2436 | #endif |
32090b8e KR |
2437 | elf_swap_shdr_out (abfd, i_shdrp[count], x_shdrp + count); |
2438 | } | |
4002f18a ILT |
2439 | if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0 |
2440 | || (bfd_write ((PTR) x_shdrp, sizeof (*x_shdrp), i_ehdrp->e_shnum, abfd) | |
d909628b | 2441 | != sizeof (*x_shdrp) * i_ehdrp->e_shnum)) |
4002f18a ILT |
2442 | return false; |
2443 | ||
32090b8e | 2444 | /* need to dump the string table too... */ |
244ffee7 | 2445 | |
32090b8e KR |
2446 | return true; |
2447 | } | |
244ffee7 | 2448 | |
013dec1a ILT |
2449 | /* Assign file positions for all the reloc sections which are not part |
2450 | of the loadable file image. */ | |
2451 | ||
32090b8e KR |
2452 | static void |
2453 | assign_file_positions_for_relocs (abfd) | |
2454 | bfd *abfd; | |
2455 | { | |
013dec1a | 2456 | file_ptr off; |
68241b2b | 2457 | unsigned int i; |
013dec1a ILT |
2458 | Elf_Internal_Shdr **shdrpp; |
2459 | ||
2460 | off = elf_tdata (abfd)->next_file_pos; | |
2461 | ||
2462 | for (i = 1, shdrpp = elf_elfsections (abfd) + 1; | |
2463 | i < elf_elfheader (abfd)->e_shnum; | |
2464 | i++, shdrpp++) | |
32090b8e | 2465 | { |
013dec1a ILT |
2466 | Elf_Internal_Shdr *shdrp; |
2467 | ||
2468 | shdrp = *shdrpp; | |
2469 | if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA) | |
2470 | && shdrp->sh_offset == -1) | |
2471 | off = assign_file_position_for_section (shdrp, off, true); | |
32090b8e | 2472 | } |
013dec1a | 2473 | |
1c6042ee | 2474 | elf_tdata (abfd)->next_file_pos = off; |
32090b8e | 2475 | } |
244ffee7 | 2476 | |
32090b8e | 2477 | boolean |
1c6042ee ILT |
2478 | NAME(bfd_elf,write_object_contents) (abfd) |
2479 | bfd *abfd; | |
32090b8e | 2480 | { |
062189c6 | 2481 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
32090b8e KR |
2482 | Elf_Internal_Ehdr *i_ehdrp; |
2483 | Elf_Internal_Shdr **i_shdrp; | |
68241b2b | 2484 | unsigned int count; |
244ffee7 | 2485 | |
6ec3bb6a ILT |
2486 | if (! abfd->output_has_begun |
2487 | && ! elf_compute_section_file_positions (abfd, | |
2488 | (struct bfd_link_info *) NULL)) | |
2489 | return false; | |
244ffee7 | 2490 | |
32090b8e KR |
2491 | i_shdrp = elf_elfsections (abfd); |
2492 | i_ehdrp = elf_elfheader (abfd); | |
244ffee7 | 2493 | |
32090b8e | 2494 | bfd_map_over_sections (abfd, write_relocs, (PTR) 0); |
32090b8e | 2495 | assign_file_positions_for_relocs (abfd); |
244ffee7 | 2496 | |
32090b8e | 2497 | /* After writing the headers, we need to write the sections too... */ |
062189c6 | 2498 | for (count = 1; count < i_ehdrp->e_shnum; count++) |
e621c5cc | 2499 | { |
e621c5cc ILT |
2500 | if (bed->elf_backend_section_processing) |
2501 | (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]); | |
2502 | if (i_shdrp[count]->contents) | |
2503 | { | |
4002f18a ILT |
2504 | if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0 |
2505 | || (bfd_write (i_shdrp[count]->contents, i_shdrp[count]->sh_size, | |
2506 | 1, abfd) | |
2507 | != i_shdrp[count]->sh_size)) | |
2508 | return false; | |
e621c5cc ILT |
2509 | } |
2510 | } | |
062189c6 ILT |
2511 | |
2512 | if (bed->elf_backend_final_write_processing) | |
3c9832f8 ILT |
2513 | (*bed->elf_backend_final_write_processing) (abfd, |
2514 | elf_tdata (abfd)->linker); | |
062189c6 | 2515 | |
32090b8e KR |
2516 | return write_shdrs_and_ehdr (abfd); |
2517 | } | |
244ffee7 | 2518 | |
32090b8e KR |
2519 | /* Given an index of a section, retrieve a pointer to it. Note |
2520 | that for our purposes, sections are indexed by {1, 2, ...} with | |
2521 | 0 being an illegal index. */ | |
244ffee7 | 2522 | |
32090b8e KR |
2523 | /* In the original, each ELF section went into exactly one BFD |
2524 | section. This doesn't really make sense, so we need a real mapping. | |
2525 | The mapping has to hide in the Elf_Internal_Shdr since asection | |
2526 | doesn't have anything like a tdata field... */ | |
244ffee7 | 2527 | |
2e03ce18 | 2528 | static asection * |
1c6042ee ILT |
2529 | section_from_elf_index (abfd, index) |
2530 | bfd *abfd; | |
2531 | unsigned int index; | |
32090b8e | 2532 | { |
badd23e3 | 2533 | /* @@ Is bfd_com_section_ptr really correct in all the places it could |
32090b8e | 2534 | be returned from this routine? */ |
244ffee7 | 2535 | |
32090b8e | 2536 | if (index == SHN_ABS) |
badd23e3 | 2537 | return bfd_com_section_ptr; /* not abs? */ |
32090b8e | 2538 | if (index == SHN_COMMON) |
badd23e3 | 2539 | return bfd_com_section_ptr; |
244ffee7 | 2540 | |
e9227b42 | 2541 | if (index >= elf_elfheader (abfd)->e_shnum) |
2e03ce18 | 2542 | return NULL; |
244ffee7 JK |
2543 | |
2544 | { | |
32090b8e | 2545 | Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[index]; |
244ffee7 | 2546 | |
32090b8e | 2547 | switch (hdr->sh_type) |
244ffee7 | 2548 | { |
32090b8e KR |
2549 | /* ELF sections that map to BFD sections */ |
2550 | case SHT_PROGBITS: | |
2551 | case SHT_NOBITS: | |
013dec1a ILT |
2552 | case SHT_HASH: |
2553 | case SHT_DYNAMIC: | |
2e03ce18 ILT |
2554 | if (hdr->rawdata == NULL) |
2555 | { | |
2556 | if (! bfd_section_from_shdr (abfd, index)) | |
2557 | return NULL; | |
2558 | } | |
32090b8e | 2559 | return (struct sec *) hdr->rawdata; |
244ffee7 | 2560 | |
32090b8e | 2561 | default: |
badd23e3 | 2562 | return bfd_abs_section_ptr; |
244ffee7 | 2563 | } |
244ffee7 | 2564 | } |
32090b8e | 2565 | } |
244ffee7 | 2566 | |
32090b8e KR |
2567 | /* given a section, search the header to find them... */ |
2568 | static int | |
1c6042ee ILT |
2569 | elf_section_from_bfd_section (abfd, asect) |
2570 | bfd *abfd; | |
2571 | struct sec *asect; | |
32090b8e KR |
2572 | { |
2573 | Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd); | |
2574 | int index; | |
2575 | Elf_Internal_Shdr *hdr; | |
2576 | int maxindex = elf_elfheader (abfd)->e_shnum; | |
244ffee7 | 2577 | |
badd23e3 ILT |
2578 | if (asect->owner == NULL) |
2579 | { | |
2580 | if (bfd_is_abs_section (asect)) | |
2581 | return SHN_ABS; | |
2582 | if (bfd_is_com_section (asect)) | |
2583 | return SHN_COMMON; | |
2584 | if (bfd_is_und_section (asect)) | |
2585 | return SHN_UNDEF; | |
2586 | return -1; | |
2587 | } | |
2588 | ||
2589 | BFD_ASSERT (asect->owner == abfd); | |
244ffee7 | 2590 | |
32090b8e KR |
2591 | for (index = 0; index < maxindex; index++) |
2592 | { | |
2593 | hdr = i_shdrp[index]; | |
2594 | switch (hdr->sh_type) | |
2595 | { | |
2596 | /* ELF sections that map to BFD sections */ | |
2597 | case SHT_PROGBITS: | |
2598 | case SHT_NOBITS: | |
e621c5cc | 2599 | case SHT_NOTE: |
013dec1a ILT |
2600 | case SHT_HASH: |
2601 | case SHT_DYNAMIC: | |
fa15568a | 2602 | case SHT_DYNSYM: |
823609fe | 2603 | case SHT_SYMTAB: |
32090b8e KR |
2604 | if (hdr->rawdata) |
2605 | { | |
2606 | if (((struct sec *) (hdr->rawdata)) == asect) | |
2607 | return index; | |
2608 | } | |
2609 | break; | |
01383fb4 | 2610 | |
fa15568a ILT |
2611 | case SHT_REL: |
2612 | case SHT_RELA: | |
2613 | /* We sometimes map a reloc section to a BFD section. */ | |
e6667b2b | 2614 | if (hdr->sh_link != elf_onesymtab (abfd) |
fa15568a ILT |
2615 | && (asection *) hdr->rawdata == asect) |
2616 | return index; | |
2617 | break; | |
2618 | ||
01383fb4 | 2619 | case SHT_STRTAB: |
fa15568a ILT |
2620 | /* We map most string tables to BFD sections. */ |
2621 | if (index != elf_elfheader (abfd)->e_shstrndx | |
2622 | && index != elf_onesymtab (abfd) | |
2623 | && (asection *) hdr->rawdata == asect) | |
2624 | return index; | |
2625 | ||
01383fb4 | 2626 | /* FALL THROUGH */ |
32090b8e | 2627 | default: |
e621c5cc ILT |
2628 | { |
2629 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
2630 | ||
2631 | if (bed->elf_backend_section_from_bfd_section) | |
f035cc47 ILT |
2632 | { |
2633 | int retval; | |
2634 | ||
2635 | retval = index; | |
2636 | if ((*bed->elf_backend_section_from_bfd_section) | |
2637 | (abfd, hdr, asect, &retval)) | |
2638 | return retval; | |
2639 | } | |
e621c5cc | 2640 | } |
32090b8e KR |
2641 | break; |
2642 | } | |
2643 | } | |
2644 | return -1; | |
2645 | } | |
244ffee7 | 2646 | |
32090b8e KR |
2647 | /* given a symbol, return the bfd index for that symbol. */ |
2648 | static int | |
1c6042ee ILT |
2649 | elf_symbol_from_bfd_symbol (abfd, asym_ptr_ptr) |
2650 | bfd *abfd; | |
2651 | struct symbol_cache_entry **asym_ptr_ptr; | |
32090b8e KR |
2652 | { |
2653 | struct symbol_cache_entry *asym_ptr = *asym_ptr_ptr; | |
32090b8e | 2654 | int idx; |
d24928c0 | 2655 | flagword flags = asym_ptr->flags; |
32090b8e | 2656 | |
d24928c0 KR |
2657 | /* When gas creates relocations against local labels, it creates its |
2658 | own symbol for the section, but does put the symbol into the | |
e621c5cc ILT |
2659 | symbol chain, so udata is 0. When the linker is generating |
2660 | relocatable output, this section symbol may be for one of the | |
2661 | input sections rather than the output section. */ | |
d24928c0 KR |
2662 | if (asym_ptr->udata == (PTR) 0 |
2663 | && (flags & BSF_SECTION_SYM) | |
e621c5cc ILT |
2664 | && asym_ptr->section) |
2665 | { | |
2666 | int indx; | |
2667 | ||
2668 | if (asym_ptr->section->output_section != NULL) | |
2669 | indx = asym_ptr->section->output_section->index; | |
2670 | else | |
2671 | indx = asym_ptr->section->index; | |
2672 | if (elf_section_syms (abfd)[indx]) | |
2673 | asym_ptr->udata = elf_section_syms (abfd)[indx]->udata; | |
01383fb4 | 2674 | } |
e621c5cc | 2675 | |
d24928c0 | 2676 | if (asym_ptr->udata) |
1c6042ee | 2677 | idx = ((Elf_Sym_Extra *) asym_ptr->udata)->elf_sym_num; |
d24928c0 | 2678 | else |
32090b8e | 2679 | { |
32090b8e KR |
2680 | abort (); |
2681 | } | |
244ffee7 | 2682 | |
32090b8e | 2683 | #if DEBUG & 4 |
244ffee7 | 2684 | { |
244ffee7 | 2685 | |
32090b8e | 2686 | fprintf (stderr, |
d24928c0 | 2687 | "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx %s\n", |
1c6042ee | 2688 | (long) asym_ptr, asym_ptr->name, idx, flags, elf_symbol_flags (flags)); |
32090b8e KR |
2689 | fflush (stderr); |
2690 | } | |
2691 | #endif | |
2692 | ||
2693 | return idx; | |
2694 | } | |
2695 | ||
cb71adf1 PS |
2696 | static long |
2697 | elf_slurp_symbol_table (abfd, symptrs, dynamic) | |
1c6042ee ILT |
2698 | bfd *abfd; |
2699 | asymbol **symptrs; /* Buffer for generated bfd symbols */ | |
cb71adf1 | 2700 | boolean dynamic; |
32090b8e | 2701 | { |
cb71adf1 | 2702 | Elf_Internal_Shdr *hdr; |
7d8aaf36 | 2703 | long symcount; /* Number of external ELF symbols */ |
32090b8e KR |
2704 | elf_symbol_type *sym; /* Pointer to current bfd symbol */ |
2705 | elf_symbol_type *symbase; /* Buffer for generated bfd symbols */ | |
2706 | Elf_Internal_Sym i_sym; | |
80425e6c | 2707 | Elf_External_Sym *x_symp = NULL; |
32090b8e | 2708 | |
32090b8e KR |
2709 | /* Read each raw ELF symbol, converting from external ELF form to |
2710 | internal ELF form, and then using the information to create a | |
2711 | canonical bfd symbol table entry. | |
244ffee7 | 2712 | |
32090b8e KR |
2713 | Note that we allocate the initial bfd canonical symbol buffer |
2714 | based on a one-to-one mapping of the ELF symbols to canonical | |
2715 | symbols. We actually use all the ELF symbols, so there will be no | |
2716 | space left over at the end. When we have all the symbols, we | |
2717 | build the caller's pointer vector. */ | |
244ffee7 | 2718 | |
cb71adf1 PS |
2719 | if (dynamic) |
2720 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
2721 | else | |
2722 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
32090b8e | 2723 | if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) == -1) |
cb71adf1 | 2724 | return -1; |
244ffee7 | 2725 | |
32090b8e | 2726 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
244ffee7 | 2727 | |
7d8aaf36 ILT |
2728 | if (symcount == 0) |
2729 | sym = symbase = NULL; | |
2730 | else | |
244ffee7 | 2731 | { |
7d8aaf36 | 2732 | long i; |
244ffee7 | 2733 | |
7d8aaf36 | 2734 | if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) == -1) |
cb71adf1 | 2735 | return -1; |
7d8aaf36 ILT |
2736 | |
2737 | symbase = ((elf_symbol_type *) | |
2738 | bfd_zalloc (abfd, symcount * sizeof (elf_symbol_type))); | |
2739 | if (symbase == (elf_symbol_type *) NULL) | |
32090b8e | 2740 | { |
7d8aaf36 | 2741 | bfd_set_error (bfd_error_no_memory); |
cb71adf1 | 2742 | return -1; |
32090b8e | 2743 | } |
7d8aaf36 ILT |
2744 | sym = symbase; |
2745 | ||
2746 | /* Temporarily allocate room for the raw ELF symbols. */ | |
2747 | x_symp = ((Elf_External_Sym *) | |
80425e6c | 2748 | malloc (symcount * sizeof (Elf_External_Sym))); |
25057836 | 2749 | if (x_symp == NULL && symcount != 0) |
80425e6c JK |
2750 | { |
2751 | bfd_set_error (bfd_error_no_memory); | |
2752 | goto error_return; | |
2753 | } | |
7d8aaf36 ILT |
2754 | |
2755 | if (bfd_read ((PTR) x_symp, sizeof (Elf_External_Sym), symcount, abfd) | |
2756 | != symcount * sizeof (Elf_External_Sym)) | |
25057836 | 2757 | goto error_return; |
7d8aaf36 ILT |
2758 | /* Skip first symbol, which is a null dummy. */ |
2759 | for (i = 1; i < symcount; i++) | |
32090b8e | 2760 | { |
7d8aaf36 ILT |
2761 | elf_swap_symbol_in (abfd, x_symp + i, &i_sym); |
2762 | memcpy (&sym->internal_elf_sym, &i_sym, sizeof (Elf_Internal_Sym)); | |
2763 | #ifdef ELF_KEEP_EXTSYM | |
2764 | memcpy (&sym->native_elf_sym, x_symp + i, sizeof (Elf_External_Sym)); | |
2765 | #endif | |
2766 | sym->symbol.the_bfd = abfd; | |
244ffee7 | 2767 | |
7d8aaf36 ILT |
2768 | sym->symbol.name = elf_string_from_elf_section (abfd, hdr->sh_link, |
2769 | i_sym.st_name); | |
244ffee7 | 2770 | |
7d8aaf36 | 2771 | sym->symbol.value = i_sym.st_value; |
244ffee7 | 2772 | |
6ec3bb6a | 2773 | if (i_sym.st_shndx > 0 && i_sym.st_shndx < SHN_LORESERVE) |
7d8aaf36 ILT |
2774 | { |
2775 | sym->symbol.section = section_from_elf_index (abfd, | |
2776 | i_sym.st_shndx); | |
2e03ce18 | 2777 | if (sym->symbol.section == NULL) |
013dec1a ILT |
2778 | { |
2779 | /* This symbol is in a section for which we did not | |
2780 | create a BFD section. Just use bfd_abs_section, | |
2781 | although it is wrong. FIXME. */ | |
badd23e3 | 2782 | sym->symbol.section = bfd_abs_section_ptr; |
013dec1a | 2783 | } |
7d8aaf36 ILT |
2784 | } |
2785 | else if (i_sym.st_shndx == SHN_ABS) | |
2786 | { | |
badd23e3 | 2787 | sym->symbol.section = bfd_abs_section_ptr; |
7d8aaf36 ILT |
2788 | } |
2789 | else if (i_sym.st_shndx == SHN_COMMON) | |
2790 | { | |
badd23e3 | 2791 | sym->symbol.section = bfd_com_section_ptr; |
7d8aaf36 ILT |
2792 | /* Elf puts the alignment into the `value' field, and |
2793 | the size into the `size' field. BFD wants to see the | |
2794 | size in the value field, and doesn't care (at the | |
2795 | moment) about the alignment. */ | |
2796 | sym->symbol.value = i_sym.st_size; | |
2797 | } | |
2798 | else if (i_sym.st_shndx == SHN_UNDEF) | |
2799 | { | |
badd23e3 | 2800 | sym->symbol.section = bfd_und_section_ptr; |
7d8aaf36 ILT |
2801 | } |
2802 | else | |
badd23e3 | 2803 | sym->symbol.section = bfd_abs_section_ptr; |
300adb31 | 2804 | |
7d8aaf36 | 2805 | sym->symbol.value -= sym->symbol.section->vma; |
244ffee7 | 2806 | |
7d8aaf36 ILT |
2807 | switch (ELF_ST_BIND (i_sym.st_info)) |
2808 | { | |
2809 | case STB_LOCAL: | |
2810 | sym->symbol.flags |= BSF_LOCAL; | |
2811 | break; | |
2812 | case STB_GLOBAL: | |
2813 | sym->symbol.flags |= BSF_GLOBAL; | |
2814 | break; | |
2815 | case STB_WEAK: | |
2816 | sym->symbol.flags |= BSF_WEAK; | |
2817 | break; | |
2818 | } | |
2819 | ||
2820 | switch (ELF_ST_TYPE (i_sym.st_info)) | |
2821 | { | |
2822 | case STT_SECTION: | |
2823 | sym->symbol.flags |= BSF_SECTION_SYM | BSF_DEBUGGING; | |
2824 | break; | |
2825 | case STT_FILE: | |
2826 | sym->symbol.flags |= BSF_FILE | BSF_DEBUGGING; | |
2827 | break; | |
2828 | case STT_FUNC: | |
2829 | sym->symbol.flags |= BSF_FUNCTION; | |
2830 | break; | |
2831 | } | |
2832 | ||
cb71adf1 PS |
2833 | if (dynamic) |
2834 | sym->symbol.flags |= BSF_DYNAMIC; | |
2835 | ||
7d8aaf36 ILT |
2836 | /* Do some backend-specific processing on this symbol. */ |
2837 | { | |
2838 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); | |
2839 | if (ebd->elf_backend_symbol_processing) | |
2840 | (*ebd->elf_backend_symbol_processing) (abfd, &sym->symbol); | |
2841 | } | |
2842 | ||
2843 | sym++; | |
2844 | } | |
244ffee7 JK |
2845 | } |
2846 | ||
e621c5cc ILT |
2847 | /* Do some backend-specific processing on this symbol table. */ |
2848 | { | |
2849 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); | |
2850 | if (ebd->elf_backend_symbol_table_processing) | |
2851 | (*ebd->elf_backend_symbol_table_processing) (abfd, symbase, symcount); | |
2852 | } | |
244ffee7 | 2853 | |
e621c5cc | 2854 | /* We rely on the zalloc to clear out the final symbol entry. */ |
244ffee7 | 2855 | |
cb71adf1 | 2856 | symcount = sym - symbase; |
32090b8e KR |
2857 | |
2858 | /* Fill in the user's symbol pointer vector if needed. */ | |
2859 | if (symptrs) | |
244ffee7 | 2860 | { |
cb71adf1 PS |
2861 | long l = symcount; |
2862 | ||
32090b8e | 2863 | sym = symbase; |
cb71adf1 | 2864 | while (l-- > 0) |
244ffee7 | 2865 | { |
32090b8e KR |
2866 | *symptrs++ = &sym->symbol; |
2867 | sym++; | |
244ffee7 | 2868 | } |
32090b8e | 2869 | *symptrs = 0; /* Final null pointer */ |
244ffee7 JK |
2870 | } |
2871 | ||
80425e6c JK |
2872 | if (x_symp != NULL) |
2873 | free (x_symp); | |
cb71adf1 | 2874 | return symcount; |
1c6042ee | 2875 | error_return: |
80425e6c JK |
2876 | if (x_symp != NULL) |
2877 | free (x_symp); | |
cb71adf1 | 2878 | return -1; |
244ffee7 JK |
2879 | } |
2880 | ||
32090b8e | 2881 | /* Return the number of bytes required to hold the symtab vector. |
244ffee7 | 2882 | |
32090b8e KR |
2883 | Note that we base it on the count plus 1, since we will null terminate |
2884 | the vector allocated based on this size. However, the ELF symbol table | |
2885 | always has a dummy entry as symbol #0, so it ends up even. */ | |
244ffee7 | 2886 | |
326e32d7 | 2887 | long |
1c6042ee ILT |
2888 | elf_get_symtab_upper_bound (abfd) |
2889 | bfd *abfd; | |
244ffee7 | 2890 | { |
326e32d7 ILT |
2891 | long symcount; |
2892 | long symtab_size; | |
1c6042ee | 2893 | Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr; |
326e32d7 | 2894 | |
32090b8e | 2895 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
d6439785 | 2896 | symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *)); |
244ffee7 | 2897 | |
32090b8e KR |
2898 | return symtab_size; |
2899 | } | |
244ffee7 | 2900 | |
cb71adf1 PS |
2901 | long |
2902 | elf_get_dynamic_symtab_upper_bound (abfd) | |
2903 | bfd *abfd; | |
2904 | { | |
2905 | long symcount; | |
2906 | long symtab_size; | |
2907 | Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
2908 | ||
f9779aad ILT |
2909 | if (elf_dynsymtab (abfd) == 0) |
2910 | { | |
2911 | bfd_set_error (bfd_error_invalid_operation); | |
2912 | return -1; | |
2913 | } | |
2914 | ||
cb71adf1 PS |
2915 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
2916 | symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *)); | |
2917 | ||
2918 | return symtab_size; | |
2919 | } | |
2920 | ||
326e32d7 | 2921 | long |
32090b8e KR |
2922 | elf_get_reloc_upper_bound (abfd, asect) |
2923 | bfd *abfd; | |
2924 | sec_ptr asect; | |
2925 | { | |
51fc377b | 2926 | return (asect->reloc_count + 1) * sizeof (arelent *); |
244ffee7 JK |
2927 | } |
2928 | ||
ea617174 ILT |
2929 | /* Read in and swap the external relocs. */ |
2930 | ||
32090b8e | 2931 | static boolean |
ea617174 | 2932 | elf_slurp_reloc_table (abfd, asect, symbols) |
1c6042ee | 2933 | bfd *abfd; |
ea617174 | 2934 | asection *asect; |
1c6042ee | 2935 | asymbol **symbols; |
244ffee7 | 2936 | { |
ea617174 ILT |
2937 | struct elf_backend_data * const ebd = get_elf_backend_data (abfd); |
2938 | struct bfd_elf_section_data * const d = elf_section_data (asect); | |
2939 | PTR allocated = NULL; | |
2940 | bfd_byte *native_relocs; | |
2941 | arelent *relents; | |
2942 | arelent *relent; | |
2943 | unsigned int i; | |
2944 | int entsize; | |
244ffee7 | 2945 | |
d510fd89 ILT |
2946 | if (asect->relocation != NULL |
2947 | || (asect->flags & SEC_RELOC) == 0 | |
2948 | || asect->reloc_count == 0) | |
32090b8e | 2949 | return true; |
244ffee7 | 2950 | |
ea617174 ILT |
2951 | BFD_ASSERT (asect->rel_filepos == d->rel_hdr.sh_offset |
2952 | && (asect->reloc_count | |
2953 | == d->rel_hdr.sh_size / d->rel_hdr.sh_entsize)); | |
2954 | ||
374d2ef9 ILT |
2955 | allocated = (PTR) malloc (d->rel_hdr.sh_size); |
2956 | if (allocated == NULL) | |
9783e04a | 2957 | { |
374d2ef9 ILT |
2958 | bfd_set_error (bfd_error_no_memory); |
2959 | goto error_return; | |
2960 | } | |
ea617174 | 2961 | |
374d2ef9 ILT |
2962 | if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0 |
2963 | || (bfd_read (allocated, 1, d->rel_hdr.sh_size, abfd) | |
2964 | != d->rel_hdr.sh_size)) | |
2965 | goto error_return; | |
244ffee7 | 2966 | |
374d2ef9 | 2967 | native_relocs = (bfd_byte *) allocated; |
32090b8e | 2968 | |
ea617174 ILT |
2969 | relents = ((arelent *) |
2970 | bfd_alloc (abfd, asect->reloc_count * sizeof (arelent))); | |
2971 | if (relents == NULL) | |
6a3eb9b6 | 2972 | { |
d1ad85a6 | 2973 | bfd_set_error (bfd_error_no_memory); |
ea617174 | 2974 | goto error_return; |
6a3eb9b6 | 2975 | } |
244ffee7 | 2976 | |
ea617174 ILT |
2977 | entsize = d->rel_hdr.sh_entsize; |
2978 | BFD_ASSERT (entsize == sizeof (Elf_External_Rel) | |
2979 | || entsize == sizeof (Elf_External_Rela)); | |
244ffee7 | 2980 | |
ea617174 ILT |
2981 | for (i = 0, relent = relents; |
2982 | i < asect->reloc_count; | |
2983 | i++, relent++, native_relocs += entsize) | |
2984 | { | |
2985 | Elf_Internal_Rela rela; | |
2986 | Elf_Internal_Rel rel; | |
244ffee7 | 2987 | |
ea617174 ILT |
2988 | if (entsize == sizeof (Elf_External_Rela)) |
2989 | elf_swap_reloca_in (abfd, (Elf_External_Rela *) native_relocs, &rela); | |
32090b8e KR |
2990 | else |
2991 | { | |
ea617174 ILT |
2992 | elf_swap_reloc_in (abfd, (Elf_External_Rel *) native_relocs, &rel); |
2993 | rela.r_offset = rel.r_offset; | |
2994 | rela.r_info = rel.r_info; | |
2995 | rela.r_addend = 0; | |
32090b8e | 2996 | } |
7b8106b4 | 2997 | |
ea617174 ILT |
2998 | /* The address of an ELF reloc is section relative for an object |
2999 | file, and absolute for an executable file or shared library. | |
3000 | The address of a BFD reloc is always section relative. */ | |
3001 | if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0) | |
3002 | relent->address = rela.r_offset; | |
3003 | else | |
3004 | relent->address = rela.r_offset - asect->vma; | |
3005 | ||
3006 | if (ELF_R_SYM (rela.r_info) == 0) | |
3007 | relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; | |
7b8106b4 ILT |
3008 | else |
3009 | { | |
ea617174 | 3010 | asymbol **ps, *s; |
7b8106b4 | 3011 | |
ea617174 ILT |
3012 | ps = symbols + ELF_R_SYM (rela.r_info) - 1; |
3013 | s = *ps; | |
7b8106b4 | 3014 | |
ea617174 ILT |
3015 | /* Canonicalize ELF section symbols. FIXME: Why? */ |
3016 | if ((s->flags & BSF_SECTION_SYM) == 0) | |
3017 | relent->sym_ptr_ptr = ps; | |
3018 | else | |
3019 | relent->sym_ptr_ptr = s->section->symbol_ptr_ptr; | |
7b8106b4 | 3020 | } |
244ffee7 | 3021 | |
ea617174 ILT |
3022 | relent->addend = rela.r_addend; |
3023 | ||
3024 | if (entsize == sizeof (Elf_External_Rela)) | |
3025 | (*ebd->elf_info_to_howto) (abfd, relent, &rela); | |
3026 | else | |
3027 | (*ebd->elf_info_to_howto_rel) (abfd, relent, &rel); | |
32090b8e | 3028 | } |
244ffee7 | 3029 | |
ea617174 ILT |
3030 | asect->relocation = relents; |
3031 | ||
3032 | if (allocated != NULL) | |
3033 | free (allocated); | |
3034 | ||
32090b8e | 3035 | return true; |
ea617174 ILT |
3036 | |
3037 | error_return: | |
3038 | if (allocated != NULL) | |
3039 | free (allocated); | |
3040 | return false; | |
32090b8e | 3041 | } |
238ac6ec | 3042 | |
32090b8e KR |
3043 | #ifdef DEBUG |
3044 | static void | |
3045 | elf_debug_section (str, num, hdr) | |
3046 | char *str; | |
3047 | int num; | |
3048 | Elf_Internal_Shdr *hdr; | |
3049 | { | |
3050 | fprintf (stderr, "\nSection#%d '%s' 0x%.8lx\n", num, str, (long) hdr); | |
3051 | fprintf (stderr, | |
3052 | "sh_name = %ld\tsh_type = %ld\tsh_flags = %ld\n", | |
3053 | (long) hdr->sh_name, | |
3054 | (long) hdr->sh_type, | |
3055 | (long) hdr->sh_flags); | |
3056 | fprintf (stderr, | |
3057 | "sh_addr = %ld\tsh_offset = %ld\tsh_size = %ld\n", | |
3058 | (long) hdr->sh_addr, | |
3059 | (long) hdr->sh_offset, | |
3060 | (long) hdr->sh_size); | |
3061 | fprintf (stderr, | |
3062 | "sh_link = %ld\tsh_info = %ld\tsh_addralign = %ld\n", | |
3063 | (long) hdr->sh_link, | |
3064 | (long) hdr->sh_info, | |
3065 | (long) hdr->sh_addralign); | |
3066 | fprintf (stderr, "sh_entsize = %ld\n", | |
3067 | (long) hdr->sh_entsize); | |
3068 | fprintf (stderr, "rawdata = 0x%.8lx\n", (long) hdr->rawdata); | |
3069 | fprintf (stderr, "contents = 0x%.8lx\n", (long) hdr->contents); | |
3070 | fprintf (stderr, "size = %ld\n", (long) hdr->size); | |
3071 | fflush (stderr); | |
3072 | } | |
244ffee7 | 3073 | |
32090b8e KR |
3074 | static void |
3075 | elf_debug_file (ehdrp) | |
3076 | Elf_Internal_Ehdr *ehdrp; | |
3077 | { | |
3078 | fprintf (stderr, "e_entry = 0x%.8lx\n", (long) ehdrp->e_entry); | |
3079 | fprintf (stderr, "e_phoff = %ld\n", (long) ehdrp->e_phoff); | |
3080 | fprintf (stderr, "e_phnum = %ld\n", (long) ehdrp->e_phnum); | |
3081 | fprintf (stderr, "e_phentsize = %ld\n", (long) ehdrp->e_phentsize); | |
3082 | fprintf (stderr, "e_shoff = %ld\n", (long) ehdrp->e_shoff); | |
3083 | fprintf (stderr, "e_shnum = %ld\n", (long) ehdrp->e_shnum); | |
3084 | fprintf (stderr, "e_shentsize = %ld\n", (long) ehdrp->e_shentsize); | |
244ffee7 | 3085 | } |
32090b8e | 3086 | #endif |
244ffee7 | 3087 | |
ea617174 | 3088 | /* Canonicalize the relocs. */ |
244ffee7 | 3089 | |
326e32d7 | 3090 | long |
32090b8e KR |
3091 | elf_canonicalize_reloc (abfd, section, relptr, symbols) |
3092 | bfd *abfd; | |
3093 | sec_ptr section; | |
3094 | arelent **relptr; | |
3095 | asymbol **symbols; | |
3096 | { | |
ea617174 ILT |
3097 | arelent *tblptr; |
3098 | unsigned int i; | |
32090b8e | 3099 | |
ea617174 ILT |
3100 | if (! elf_slurp_reloc_table (abfd, section, symbols)) |
3101 | return -1; | |
32090b8e KR |
3102 | |
3103 | tblptr = section->relocation; | |
ea617174 | 3104 | for (i = 0; i < section->reloc_count; i++) |
32090b8e KR |
3105 | *relptr++ = tblptr++; |
3106 | ||
ea617174 ILT |
3107 | *relptr = NULL; |
3108 | ||
32090b8e KR |
3109 | return section->reloc_count; |
3110 | } | |
3111 | ||
326e32d7 | 3112 | long |
1c6042ee ILT |
3113 | elf_get_symtab (abfd, alocation) |
3114 | bfd *abfd; | |
3115 | asymbol **alocation; | |
32090b8e | 3116 | { |
cb71adf1 PS |
3117 | long symcount = elf_slurp_symbol_table (abfd, alocation, false); |
3118 | ||
3119 | if (symcount >= 0) | |
3120 | bfd_get_symcount (abfd) = symcount; | |
3121 | return symcount; | |
3122 | } | |
326e32d7 | 3123 | |
cb71adf1 PS |
3124 | long |
3125 | elf_canonicalize_dynamic_symtab (abfd, alocation) | |
3126 | bfd *abfd; | |
3127 | asymbol **alocation; | |
3128 | { | |
3129 | return elf_slurp_symbol_table (abfd, alocation, true); | |
32090b8e KR |
3130 | } |
3131 | ||
3132 | asymbol * | |
1c6042ee ILT |
3133 | elf_make_empty_symbol (abfd) |
3134 | bfd *abfd; | |
32090b8e KR |
3135 | { |
3136 | elf_symbol_type *newsym; | |
3137 | ||
3138 | newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof (elf_symbol_type)); | |
3139 | if (!newsym) | |
3140 | { | |
d1ad85a6 | 3141 | bfd_set_error (bfd_error_no_memory); |
32090b8e KR |
3142 | return NULL; |
3143 | } | |
3144 | else | |
3145 | { | |
3146 | newsym->symbol.the_bfd = abfd; | |
3147 | return &newsym->symbol; | |
244ffee7 | 3148 | } |
32090b8e | 3149 | } |
244ffee7 | 3150 | |
32090b8e | 3151 | void |
1c6042ee ILT |
3152 | elf_get_symbol_info (ignore_abfd, symbol, ret) |
3153 | bfd *ignore_abfd; | |
3154 | asymbol *symbol; | |
3155 | symbol_info *ret; | |
32090b8e KR |
3156 | { |
3157 | bfd_symbol_info (symbol, ret); | |
3158 | } | |
244ffee7 | 3159 | |
32090b8e | 3160 | alent * |
1c6042ee ILT |
3161 | elf_get_lineno (ignore_abfd, symbol) |
3162 | bfd *ignore_abfd; | |
3163 | asymbol *symbol; | |
32090b8e KR |
3164 | { |
3165 | fprintf (stderr, "elf_get_lineno unimplemented\n"); | |
3166 | fflush (stderr); | |
3167 | BFD_FAIL (); | |
3168 | return NULL; | |
3169 | } | |
3170 | ||
3171 | boolean | |
1c6042ee ILT |
3172 | elf_set_arch_mach (abfd, arch, machine) |
3173 | bfd *abfd; | |
3174 | enum bfd_architecture arch; | |
3175 | unsigned long machine; | |
32090b8e | 3176 | { |
80a903c9 ILT |
3177 | /* If this isn't the right architecture for this backend, and this |
3178 | isn't the generic backend, fail. */ | |
3179 | if (arch != get_elf_backend_data (abfd)->arch | |
3180 | && arch != bfd_arch_unknown | |
3181 | && get_elf_backend_data (abfd)->arch != bfd_arch_unknown) | |
3182 | return false; | |
3183 | ||
3184 | return bfd_default_set_arch_mach (abfd, arch, machine); | |
32090b8e | 3185 | } |
244ffee7 | 3186 | |
32090b8e | 3187 | boolean |
1c6042ee ILT |
3188 | elf_find_nearest_line (abfd, |
3189 | section, | |
3190 | symbols, | |
3191 | offset, | |
3192 | filename_ptr, | |
3193 | functionname_ptr, | |
3194 | line_ptr) | |
3195 | bfd *abfd; | |
3196 | asection *section; | |
3197 | asymbol **symbols; | |
3198 | bfd_vma offset; | |
3199 | CONST char **filename_ptr; | |
3200 | CONST char **functionname_ptr; | |
3201 | unsigned int *line_ptr; | |
32090b8e KR |
3202 | { |
3203 | return false; | |
244ffee7 JK |
3204 | } |
3205 | ||
32090b8e | 3206 | int |
1c6042ee ILT |
3207 | elf_sizeof_headers (abfd, reloc) |
3208 | bfd *abfd; | |
3209 | boolean reloc; | |
32090b8e | 3210 | { |
013dec1a ILT |
3211 | int ret; |
3212 | ||
3213 | ret = sizeof (Elf_External_Ehdr); | |
3214 | if (! reloc) | |
3215 | ret += get_program_header_size (abfd); | |
3216 | return ret; | |
32090b8e | 3217 | } |
244ffee7 | 3218 | |
32090b8e | 3219 | boolean |
1c6042ee ILT |
3220 | elf_set_section_contents (abfd, section, location, offset, count) |
3221 | bfd *abfd; | |
3222 | sec_ptr section; | |
3223 | PTR location; | |
3224 | file_ptr offset; | |
3225 | bfd_size_type count; | |
244ffee7 | 3226 | { |
244ffee7 JK |
3227 | Elf_Internal_Shdr *hdr; |
3228 | ||
6ec3bb6a ILT |
3229 | if (! abfd->output_has_begun |
3230 | && ! elf_compute_section_file_positions (abfd, | |
3231 | (struct bfd_link_info *) NULL)) | |
3232 | return false; | |
244ffee7 | 3233 | |
1c6042ee | 3234 | hdr = &elf_section_data (section)->this_hdr; |
244ffee7 | 3235 | |
32090b8e KR |
3236 | if (bfd_seek (abfd, hdr->sh_offset + offset, SEEK_SET) == -1) |
3237 | return false; | |
3238 | if (bfd_write (location, 1, count, abfd) != count) | |
3239 | return false; | |
3240 | ||
3241 | return true; | |
3242 | } | |
3243 | ||
3244 | void | |
1c6042ee ILT |
3245 | elf_no_info_to_howto (abfd, cache_ptr, dst) |
3246 | bfd *abfd; | |
3247 | arelent *cache_ptr; | |
3248 | Elf_Internal_Rela *dst; | |
244ffee7 | 3249 | { |
32090b8e KR |
3250 | fprintf (stderr, "elf RELA relocation support for target machine unimplemented\n"); |
3251 | fflush (stderr); | |
3252 | BFD_FAIL (); | |
244ffee7 JK |
3253 | } |
3254 | ||
32090b8e | 3255 | void |
1c6042ee ILT |
3256 | elf_no_info_to_howto_rel (abfd, cache_ptr, dst) |
3257 | bfd *abfd; | |
3258 | arelent *cache_ptr; | |
3259 | Elf_Internal_Rel *dst; | |
244ffee7 | 3260 | { |
32090b8e KR |
3261 | fprintf (stderr, "elf REL relocation support for target machine unimplemented\n"); |
3262 | fflush (stderr); | |
3263 | BFD_FAIL (); | |
3264 | } | |
32090b8e | 3265 | \f |
1c6042ee | 3266 | |
32090b8e | 3267 | /* Core file support */ |
244ffee7 | 3268 | |
32090b8e KR |
3269 | #ifdef HAVE_PROCFS /* Some core file support requires host /proc files */ |
3270 | #include <sys/procfs.h> | |
3271 | #else | |
2e03ce18 ILT |
3272 | #define bfd_prstatus(abfd, descdata, descsz, filepos) true |
3273 | #define bfd_fpregset(abfd, descdata, descsz, filepos) true | |
3274 | #define bfd_prpsinfo(abfd, descdata, descsz, filepos) true | |
32090b8e | 3275 | #endif |
244ffee7 | 3276 | |
32090b8e | 3277 | #ifdef HAVE_PROCFS |
244ffee7 | 3278 | |
2e03ce18 | 3279 | static boolean |
1c6042ee ILT |
3280 | bfd_prstatus (abfd, descdata, descsz, filepos) |
3281 | bfd *abfd; | |
3282 | char *descdata; | |
3283 | int descsz; | |
3284 | long filepos; | |
32090b8e KR |
3285 | { |
3286 | asection *newsect; | |
3287 | prstatus_t *status = (prstatus_t *) 0; | |
244ffee7 | 3288 | |
32090b8e | 3289 | if (descsz == sizeof (prstatus_t)) |
244ffee7 | 3290 | { |
32090b8e | 3291 | newsect = bfd_make_section (abfd, ".reg"); |
2e03ce18 ILT |
3292 | if (newsect == NULL) |
3293 | return false; | |
32090b8e KR |
3294 | newsect->_raw_size = sizeof (status->pr_reg); |
3295 | newsect->filepos = filepos + (long) &status->pr_reg; | |
57a814a9 | 3296 | newsect->flags = SEC_HAS_CONTENTS; |
32090b8e KR |
3297 | newsect->alignment_power = 2; |
3298 | if ((core_prstatus (abfd) = bfd_alloc (abfd, descsz)) != NULL) | |
3299 | { | |
3300 | memcpy (core_prstatus (abfd), descdata, descsz); | |
3301 | } | |
244ffee7 | 3302 | } |
2e03ce18 | 3303 | return true; |
32090b8e | 3304 | } |
244ffee7 | 3305 | |
32090b8e | 3306 | /* Stash a copy of the prpsinfo structure away for future use. */ |
244ffee7 | 3307 | |
2e03ce18 | 3308 | static boolean |
1c6042ee ILT |
3309 | bfd_prpsinfo (abfd, descdata, descsz, filepos) |
3310 | bfd *abfd; | |
3311 | char *descdata; | |
3312 | int descsz; | |
3313 | long filepos; | |
32090b8e | 3314 | { |
32090b8e KR |
3315 | if (descsz == sizeof (prpsinfo_t)) |
3316 | { | |
2e03ce18 | 3317 | if ((core_prpsinfo (abfd) = bfd_alloc (abfd, descsz)) == NULL) |
244ffee7 | 3318 | { |
2e03ce18 ILT |
3319 | bfd_set_error (bfd_error_no_memory); |
3320 | return false; | |
244ffee7 | 3321 | } |
2e03ce18 | 3322 | memcpy (core_prpsinfo (abfd), descdata, descsz); |
244ffee7 | 3323 | } |
2e03ce18 | 3324 | return true; |
244ffee7 JK |
3325 | } |
3326 | ||
2e03ce18 | 3327 | static boolean |
1c6042ee ILT |
3328 | bfd_fpregset (abfd, descdata, descsz, filepos) |
3329 | bfd *abfd; | |
3330 | char *descdata; | |
3331 | int descsz; | |
3332 | long filepos; | |
244ffee7 | 3333 | { |
32090b8e | 3334 | asection *newsect; |
244ffee7 | 3335 | |
32090b8e | 3336 | newsect = bfd_make_section (abfd, ".reg2"); |
2e03ce18 ILT |
3337 | if (newsect == NULL) |
3338 | return false; | |
32090b8e KR |
3339 | newsect->_raw_size = descsz; |
3340 | newsect->filepos = filepos; | |
57a814a9 | 3341 | newsect->flags = SEC_HAS_CONTENTS; |
32090b8e | 3342 | newsect->alignment_power = 2; |
2e03ce18 | 3343 | return true; |
6a3eb9b6 | 3344 | } |
244ffee7 | 3345 | |
32090b8e KR |
3346 | #endif /* HAVE_PROCFS */ |
3347 | ||
3348 | /* Return a pointer to the args (including the command name) that were | |
3349 | seen by the program that generated the core dump. Note that for | |
3350 | some reason, a spurious space is tacked onto the end of the args | |
3351 | in some (at least one anyway) implementations, so strip it off if | |
3352 | it exists. */ | |
3353 | ||
3354 | char * | |
1c6042ee ILT |
3355 | elf_core_file_failing_command (abfd) |
3356 | bfd *abfd; | |
244ffee7 | 3357 | { |
32090b8e KR |
3358 | #ifdef HAVE_PROCFS |
3359 | if (core_prpsinfo (abfd)) | |
3360 | { | |
3361 | prpsinfo_t *p = core_prpsinfo (abfd); | |
3362 | char *scan = p->pr_psargs; | |
3363 | while (*scan++) | |
3364 | {; | |
3365 | } | |
3366 | scan -= 2; | |
3367 | if ((scan > p->pr_psargs) && (*scan == ' ')) | |
3368 | { | |
3369 | *scan = '\000'; | |
3370 | } | |
3371 | return p->pr_psargs; | |
3372 | } | |
3373 | #endif | |
3374 | return NULL; | |
3375 | } | |
244ffee7 | 3376 | |
32090b8e KR |
3377 | /* Return the number of the signal that caused the core dump. Presumably, |
3378 | since we have a core file, we got a signal of some kind, so don't bother | |
3379 | checking the other process status fields, just return the signal number. | |
3380 | */ | |
244ffee7 | 3381 | |
32090b8e | 3382 | int |
1c6042ee ILT |
3383 | elf_core_file_failing_signal (abfd) |
3384 | bfd *abfd; | |
32090b8e KR |
3385 | { |
3386 | #ifdef HAVE_PROCFS | |
3387 | if (core_prstatus (abfd)) | |
3388 | { | |
3389 | return ((prstatus_t *) (core_prstatus (abfd)))->pr_cursig; | |
3390 | } | |
3391 | #endif | |
3392 | return -1; | |
3393 | } | |
244ffee7 | 3394 | |
32090b8e KR |
3395 | /* Check to see if the core file could reasonably be expected to have |
3396 | come for the current executable file. Note that by default we return | |
3397 | true unless we find something that indicates that there might be a | |
3398 | problem. | |
3399 | */ | |
244ffee7 | 3400 | |
32090b8e | 3401 | boolean |
1c6042ee ILT |
3402 | elf_core_file_matches_executable_p (core_bfd, exec_bfd) |
3403 | bfd *core_bfd; | |
3404 | bfd *exec_bfd; | |
32090b8e KR |
3405 | { |
3406 | #ifdef HAVE_PROCFS | |
3407 | char *corename; | |
3408 | char *execname; | |
3409 | #endif | |
244ffee7 | 3410 | |
32090b8e KR |
3411 | /* First, xvecs must match since both are ELF files for the same target. */ |
3412 | ||
3413 | if (core_bfd->xvec != exec_bfd->xvec) | |
244ffee7 | 3414 | { |
d1ad85a6 | 3415 | bfd_set_error (bfd_error_system_call); |
244ffee7 JK |
3416 | return false; |
3417 | } | |
3418 | ||
32090b8e | 3419 | #ifdef HAVE_PROCFS |
244ffee7 | 3420 | |
32090b8e KR |
3421 | /* If no prpsinfo, just return true. Otherwise, grab the last component |
3422 | of the exec'd pathname from the prpsinfo. */ | |
244ffee7 | 3423 | |
32090b8e | 3424 | if (core_prpsinfo (core_bfd)) |
244ffee7 | 3425 | { |
32090b8e KR |
3426 | corename = (((struct prpsinfo *) core_prpsinfo (core_bfd))->pr_fname); |
3427 | } | |
3428 | else | |
3429 | { | |
3430 | return true; | |
3431 | } | |
244ffee7 | 3432 | |
32090b8e | 3433 | /* Find the last component of the executable pathname. */ |
244ffee7 | 3434 | |
32090b8e KR |
3435 | if ((execname = strrchr (exec_bfd->filename, '/')) != NULL) |
3436 | { | |
3437 | execname++; | |
3438 | } | |
3439 | else | |
3440 | { | |
3441 | execname = (char *) exec_bfd->filename; | |
3442 | } | |
244ffee7 | 3443 | |
32090b8e | 3444 | /* See if they match */ |
244ffee7 | 3445 | |
32090b8e | 3446 | return strcmp (execname, corename) ? false : true; |
244ffee7 | 3447 | |
32090b8e | 3448 | #else |
244ffee7 | 3449 | |
244ffee7 | 3450 | return true; |
244ffee7 | 3451 | |
32090b8e KR |
3452 | #endif /* HAVE_PROCFS */ |
3453 | } | |
244ffee7 | 3454 | |
32090b8e KR |
3455 | /* ELF core files contain a segment of type PT_NOTE, that holds much of |
3456 | the information that would normally be available from the /proc interface | |
3457 | for the process, at the time the process dumped core. Currently this | |
3458 | includes copies of the prstatus, prpsinfo, and fpregset structures. | |
244ffee7 | 3459 | |
32090b8e KR |
3460 | Since these structures are potentially machine dependent in size and |
3461 | ordering, bfd provides two levels of support for them. The first level, | |
3462 | available on all machines since it does not require that the host | |
3463 | have /proc support or the relevant include files, is to create a bfd | |
3464 | section for each of the prstatus, prpsinfo, and fpregset structures, | |
3465 | without any interpretation of their contents. With just this support, | |
3466 | the bfd client will have to interpret the structures itself. Even with | |
3467 | /proc support, it might want these full structures for it's own reasons. | |
244ffee7 | 3468 | |
32090b8e KR |
3469 | In the second level of support, where HAVE_PROCFS is defined, bfd will |
3470 | pick apart the structures to gather some additional information that | |
3471 | clients may want, such as the general register set, the name of the | |
3472 | exec'ed file and its arguments, the signal (if any) that caused the | |
3473 | core dump, etc. | |
244ffee7 | 3474 | |
32090b8e | 3475 | */ |
244ffee7 | 3476 | |
32090b8e | 3477 | static boolean |
1c6042ee ILT |
3478 | elf_corefile_note (abfd, hdr) |
3479 | bfd *abfd; | |
3480 | Elf_Internal_Phdr *hdr; | |
244ffee7 | 3481 | { |
32090b8e KR |
3482 | Elf_External_Note *x_note_p; /* Elf note, external form */ |
3483 | Elf_Internal_Note i_note; /* Elf note, internal form */ | |
3484 | char *buf = NULL; /* Entire note segment contents */ | |
3485 | char *namedata; /* Name portion of the note */ | |
3486 | char *descdata; /* Descriptor portion of the note */ | |
3487 | char *sectname; /* Name to use for new section */ | |
3488 | long filepos; /* File offset to descriptor data */ | |
3489 | asection *newsect; | |
3490 | ||
3491 | if (hdr->p_filesz > 0 | |
b9d5cdf0 | 3492 | && (buf = (char *) malloc (hdr->p_filesz)) != NULL |
32090b8e KR |
3493 | && bfd_seek (abfd, hdr->p_offset, SEEK_SET) != -1 |
3494 | && bfd_read ((PTR) buf, hdr->p_filesz, 1, abfd) == hdr->p_filesz) | |
3495 | { | |
3496 | x_note_p = (Elf_External_Note *) buf; | |
3497 | while ((char *) x_note_p < (buf + hdr->p_filesz)) | |
3498 | { | |
3499 | i_note.namesz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->namesz); | |
3500 | i_note.descsz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->descsz); | |
3501 | i_note.type = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->type); | |
3502 | namedata = x_note_p->name; | |
3503 | descdata = namedata + BFD_ALIGN (i_note.namesz, 4); | |
3504 | filepos = hdr->p_offset + (descdata - buf); | |
3505 | switch (i_note.type) | |
3506 | { | |
3507 | case NT_PRSTATUS: | |
3508 | /* process descdata as prstatus info */ | |
2e03ce18 ILT |
3509 | if (! bfd_prstatus (abfd, descdata, i_note.descsz, filepos)) |
3510 | return false; | |
32090b8e KR |
3511 | sectname = ".prstatus"; |
3512 | break; | |
3513 | case NT_FPREGSET: | |
3514 | /* process descdata as fpregset info */ | |
2e03ce18 ILT |
3515 | if (! bfd_fpregset (abfd, descdata, i_note.descsz, filepos)) |
3516 | return false; | |
32090b8e KR |
3517 | sectname = ".fpregset"; |
3518 | break; | |
3519 | case NT_PRPSINFO: | |
3520 | /* process descdata as prpsinfo */ | |
2e03ce18 ILT |
3521 | if (! bfd_prpsinfo (abfd, descdata, i_note.descsz, filepos)) |
3522 | return false; | |
32090b8e KR |
3523 | sectname = ".prpsinfo"; |
3524 | break; | |
3525 | default: | |
3526 | /* Unknown descriptor, just ignore it. */ | |
3527 | sectname = NULL; | |
3528 | break; | |
3529 | } | |
3530 | if (sectname != NULL) | |
3531 | { | |
3532 | newsect = bfd_make_section (abfd, sectname); | |
2e03ce18 ILT |
3533 | if (newsect == NULL) |
3534 | return false; | |
32090b8e KR |
3535 | newsect->_raw_size = i_note.descsz; |
3536 | newsect->filepos = filepos; | |
3537 | newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS; | |
3538 | newsect->alignment_power = 2; | |
3539 | } | |
3540 | x_note_p = (Elf_External_Note *) | |
3541 | (descdata + BFD_ALIGN (i_note.descsz, 4)); | |
3542 | } | |
3543 | } | |
3544 | if (buf != NULL) | |
3545 | { | |
3546 | free (buf); | |
3547 | } | |
b9d5cdf0 DM |
3548 | else if (hdr->p_filesz > 0) |
3549 | { | |
d1ad85a6 | 3550 | bfd_set_error (bfd_error_no_memory); |
b9d5cdf0 DM |
3551 | return false; |
3552 | } | |
32090b8e | 3553 | return true; |
244ffee7 | 3554 | |
244ffee7 JK |
3555 | } |
3556 | ||
32090b8e KR |
3557 | /* Core files are simply standard ELF formatted files that partition |
3558 | the file using the execution view of the file (program header table) | |
3559 | rather than the linking view. In fact, there is no section header | |
3560 | table in a core file. | |
3561 | ||
3562 | The process status information (including the contents of the general | |
3563 | register set) and the floating point register set are stored in a | |
3564 | segment of type PT_NOTE. We handcraft a couple of extra bfd sections | |
3565 | that allow standard bfd access to the general registers (.reg) and the | |
3566 | floating point registers (.reg2). | |
3567 | ||
3568 | */ | |
3569 | ||
2f3508ad | 3570 | const bfd_target * |
1c6042ee ILT |
3571 | elf_core_file_p (abfd) |
3572 | bfd *abfd; | |
244ffee7 | 3573 | { |
32090b8e KR |
3574 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
3575 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
3576 | Elf_External_Phdr x_phdr; /* Program header table entry, external form */ | |
3577 | Elf_Internal_Phdr *i_phdrp; /* Program header table, internal form */ | |
3578 | unsigned int phindex; | |
d6439785 | 3579 | struct elf_backend_data *ebd; |
244ffee7 | 3580 | |
32090b8e KR |
3581 | /* Read in the ELF header in external format. */ |
3582 | ||
3583 | if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr)) | |
244ffee7 | 3584 | { |
25057836 JL |
3585 | if (bfd_get_error () != bfd_error_system_call) |
3586 | bfd_set_error (bfd_error_wrong_format); | |
244ffee7 JK |
3587 | return NULL; |
3588 | } | |
32090b8e KR |
3589 | |
3590 | /* Now check to see if we have a valid ELF file, and one that BFD can | |
3591 | make use of. The magic number must match, the address size ('class') | |
3592 | and byte-swapping must match our XVEC entry, and it must have a | |
3593 | program header table (FIXME: See comments re segments at top of this | |
3594 | file). */ | |
3595 | ||
3596 | if (elf_file_p (&x_ehdr) == false) | |
244ffee7 | 3597 | { |
32090b8e | 3598 | wrong: |
d1ad85a6 | 3599 | bfd_set_error (bfd_error_wrong_format); |
32090b8e | 3600 | return NULL; |
244ffee7 | 3601 | } |
244ffee7 | 3602 | |
32090b8e | 3603 | /* FIXME, Check EI_VERSION here ! */ |
244ffee7 | 3604 | |
32090b8e KR |
3605 | { |
3606 | #if ARCH_SIZE == 32 | |
3607 | int desired_address_size = ELFCLASS32; | |
3608 | #endif | |
3609 | #if ARCH_SIZE == 64 | |
3610 | int desired_address_size = ELFCLASS64; | |
3611 | #endif | |
3612 | ||
3613 | if (x_ehdr.e_ident[EI_CLASS] != desired_address_size) | |
3614 | goto wrong; | |
3615 | } | |
3616 | ||
3617 | /* Switch xvec to match the specified byte order. */ | |
3618 | switch (x_ehdr.e_ident[EI_DATA]) | |
244ffee7 | 3619 | { |
32090b8e KR |
3620 | case ELFDATA2MSB: /* Big-endian */ |
3621 | if (abfd->xvec->byteorder_big_p == false) | |
3622 | goto wrong; | |
244ffee7 | 3623 | break; |
32090b8e KR |
3624 | case ELFDATA2LSB: /* Little-endian */ |
3625 | if (abfd->xvec->byteorder_big_p == true) | |
3626 | goto wrong; | |
244ffee7 | 3627 | break; |
32090b8e KR |
3628 | case ELFDATANONE: /* No data encoding specified */ |
3629 | default: /* Unknown data encoding specified */ | |
3630 | goto wrong; | |
244ffee7 JK |
3631 | } |
3632 | ||
32090b8e KR |
3633 | /* Allocate an instance of the elf_obj_tdata structure and hook it up to |
3634 | the tdata pointer in the bfd. */ | |
244ffee7 | 3635 | |
32090b8e KR |
3636 | elf_tdata (abfd) = |
3637 | (struct elf_obj_tdata *) bfd_zalloc (abfd, sizeof (struct elf_obj_tdata)); | |
3638 | if (elf_tdata (abfd) == NULL) | |
244ffee7 | 3639 | { |
d1ad85a6 | 3640 | bfd_set_error (bfd_error_no_memory); |
32090b8e | 3641 | return NULL; |
244ffee7 | 3642 | } |
244ffee7 | 3643 | |
32090b8e | 3644 | /* FIXME, `wrong' returns from this point onward, leak memory. */ |
244ffee7 | 3645 | |
32090b8e KR |
3646 | /* Now that we know the byte order, swap in the rest of the header */ |
3647 | i_ehdrp = elf_elfheader (abfd); | |
3648 | elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp); | |
3649 | #if DEBUG & 1 | |
3650 | elf_debug_file (i_ehdrp); | |
3651 | #endif | |
244ffee7 | 3652 | |
d6439785 JL |
3653 | ebd = get_elf_backend_data (abfd); |
3654 | ||
3655 | /* Check that the ELF e_machine field matches what this particular | |
3656 | BFD format expects. */ | |
3657 | if (ebd->elf_machine_code != i_ehdrp->e_machine) | |
3658 | { | |
2f3508ad | 3659 | const bfd_target * const *target_ptr; |
d6439785 JL |
3660 | |
3661 | if (ebd->elf_machine_code != EM_NONE) | |
3662 | goto wrong; | |
3663 | ||
3664 | /* This is the generic ELF target. Let it match any ELF target | |
3665 | for which we do not have a specific backend. */ | |
3666 | for (target_ptr = bfd_target_vector; *target_ptr != NULL; target_ptr++) | |
3667 | { | |
3668 | struct elf_backend_data *back; | |
3669 | ||
3670 | if ((*target_ptr)->flavour != bfd_target_elf_flavour) | |
3671 | continue; | |
3672 | back = (struct elf_backend_data *) (*target_ptr)->backend_data; | |
3673 | if (back->elf_machine_code == i_ehdrp->e_machine) | |
3674 | { | |
3675 | /* target_ptr is an ELF backend which matches this | |
3676 | object file, so reject the generic ELF target. */ | |
3677 | goto wrong; | |
3678 | } | |
3679 | } | |
3680 | } | |
3681 | ||
32090b8e KR |
3682 | /* If there is no program header, or the type is not a core file, then |
3683 | we are hosed. */ | |
3684 | if (i_ehdrp->e_phoff == 0 || i_ehdrp->e_type != ET_CORE) | |
3685 | goto wrong; | |
244ffee7 | 3686 | |
32090b8e KR |
3687 | /* Allocate space for a copy of the program header table in |
3688 | internal form, seek to the program header table in the file, | |
3689 | read it in, and convert it to internal form. As a simple sanity | |
3690 | check, verify that the what BFD thinks is the size of each program | |
3691 | header table entry actually matches the size recorded in the file. */ | |
3692 | ||
3693 | if (i_ehdrp->e_phentsize != sizeof (x_phdr)) | |
3694 | goto wrong; | |
3695 | i_phdrp = (Elf_Internal_Phdr *) | |
3696 | bfd_alloc (abfd, sizeof (*i_phdrp) * i_ehdrp->e_phnum); | |
3697 | if (!i_phdrp) | |
244ffee7 | 3698 | { |
d1ad85a6 | 3699 | bfd_set_error (bfd_error_no_memory); |
32090b8e KR |
3700 | return NULL; |
3701 | } | |
3702 | if (bfd_seek (abfd, i_ehdrp->e_phoff, SEEK_SET) == -1) | |
25057836 | 3703 | return NULL; |
32090b8e KR |
3704 | for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++) |
3705 | { | |
3706 | if (bfd_read ((PTR) & x_phdr, sizeof (x_phdr), 1, abfd) | |
3707 | != sizeof (x_phdr)) | |
25057836 | 3708 | return NULL; |
32090b8e | 3709 | elf_swap_phdr_in (abfd, &x_phdr, i_phdrp + phindex); |
244ffee7 JK |
3710 | } |
3711 | ||
32090b8e KR |
3712 | /* Once all of the program headers have been read and converted, we |
3713 | can start processing them. */ | |
244ffee7 | 3714 | |
32090b8e KR |
3715 | for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++) |
3716 | { | |
3717 | bfd_section_from_phdr (abfd, i_phdrp + phindex, phindex); | |
3718 | if ((i_phdrp + phindex)->p_type == PT_NOTE) | |
3719 | { | |
2e03ce18 ILT |
3720 | if (! elf_corefile_note (abfd, i_phdrp + phindex)) |
3721 | return NULL; | |
32090b8e KR |
3722 | } |
3723 | } | |
244ffee7 | 3724 | |
32090b8e | 3725 | /* Remember the entry point specified in the ELF file header. */ |
244ffee7 | 3726 | |
32090b8e | 3727 | bfd_get_start_address (abfd) = i_ehdrp->e_entry; |
244ffee7 | 3728 | |
32090b8e | 3729 | return abfd->xvec; |
244ffee7 | 3730 | } |
6ec3bb6a ILT |
3731 | \f |
3732 | /* ELF linker code. */ | |
3733 | ||
3734 | static boolean elf_link_add_object_symbols | |
3735 | PARAMS ((bfd *, struct bfd_link_info *)); | |
3736 | static boolean elf_link_add_archive_symbols | |
3737 | PARAMS ((bfd *, struct bfd_link_info *)); | |
374d2ef9 ILT |
3738 | static Elf_Internal_Rela *elf_link_read_relocs |
3739 | PARAMS ((bfd *, asection *, PTR, Elf_Internal_Rela *, boolean)); | |
013dec1a ILT |
3740 | static boolean elf_adjust_dynamic_symbol |
3741 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
6ec3bb6a ILT |
3742 | |
3743 | /* Given an ELF BFD, add symbols to the global hash table as | |
3744 | appropriate. */ | |
3745 | ||
3746 | boolean | |
3747 | elf_bfd_link_add_symbols (abfd, info) | |
3748 | bfd *abfd; | |
3749 | struct bfd_link_info *info; | |
3750 | { | |
3751 | switch (bfd_get_format (abfd)) | |
3752 | { | |
3753 | case bfd_object: | |
3754 | return elf_link_add_object_symbols (abfd, info); | |
3755 | case bfd_archive: | |
3756 | return elf_link_add_archive_symbols (abfd, info); | |
3757 | default: | |
3758 | bfd_set_error (bfd_error_wrong_format); | |
3759 | return false; | |
3760 | } | |
3761 | } | |
3762 | ||
3763 | /* Add symbols from an ELF archive file to the linker hash table. We | |
3764 | don't use _bfd_generic_link_add_archive_symbols because of a | |
3765 | problem which arises on UnixWare. The UnixWare libc.so is an | |
3766 | archive which includes an entry libc.so.1 which defines a bunch of | |
3767 | symbols. The libc.so archive also includes a number of other | |
3768 | object files, which also define symbols, some of which are the same | |
3769 | as those defined in libc.so.1. Correct linking requires that we | |
3770 | consider each object file in turn, and include it if it defines any | |
3771 | symbols we need. _bfd_generic_link_add_archive_symbols does not do | |
3772 | this; it looks through the list of undefined symbols, and includes | |
3773 | any object file which defines them. When this algorithm is used on | |
3774 | UnixWare, it winds up pulling in libc.so.1 early and defining a | |
3775 | bunch of symbols. This means that some of the other objects in the | |
3776 | archive are not included in the link, which is incorrect since they | |
3777 | precede libc.so.1 in the archive. | |
3778 | ||
3779 | Fortunately, ELF archive handling is simpler than that done by | |
3780 | _bfd_generic_link_add_archive_symbols, which has to allow for a.out | |
3781 | oddities. In ELF, if we find a symbol in the archive map, and the | |
3782 | symbol is currently undefined, we know that we must pull in that | |
3783 | object file. | |
3784 | ||
3785 | Unfortunately, we do have to make multiple passes over the symbol | |
3786 | table until nothing further is resolved. */ | |
3787 | ||
3788 | static boolean | |
3789 | elf_link_add_archive_symbols (abfd, info) | |
3790 | bfd *abfd; | |
3791 | struct bfd_link_info *info; | |
3792 | { | |
3793 | symindex c; | |
3794 | boolean *defined = NULL; | |
3795 | boolean *included = NULL; | |
3796 | carsym *symdefs; | |
3797 | boolean loop; | |
3798 | ||
3799 | if (! bfd_has_map (abfd)) | |
3800 | { | |
3801 | bfd_set_error (bfd_error_no_symbols); | |
3802 | return false; | |
3803 | } | |
3804 | ||
3805 | /* Keep track of all symbols we know to be already defined, and all | |
3806 | files we know to be already included. This is to speed up the | |
3807 | second and subsequent passes. */ | |
3808 | c = bfd_ardata (abfd)->symdef_count; | |
3809 | if (c == 0) | |
3810 | return true; | |
3811 | defined = (boolean *) malloc (c * sizeof (boolean)); | |
3812 | included = (boolean *) malloc (c * sizeof (boolean)); | |
3813 | if (defined == (boolean *) NULL || included == (boolean *) NULL) | |
3814 | { | |
3815 | bfd_set_error (bfd_error_no_memory); | |
3816 | goto error_return; | |
3817 | } | |
3818 | memset (defined, 0, c * sizeof (boolean)); | |
3819 | memset (included, 0, c * sizeof (boolean)); | |
3820 | ||
3821 | symdefs = bfd_ardata (abfd)->symdefs; | |
3822 | ||
3823 | do | |
3824 | { | |
3825 | file_ptr last; | |
3826 | symindex i; | |
3827 | carsym *symdef; | |
3828 | carsym *symdefend; | |
3829 | ||
3830 | loop = false; | |
3831 | last = -1; | |
3832 | ||
3833 | symdef = symdefs; | |
3834 | symdefend = symdef + c; | |
3835 | for (i = 0; symdef < symdefend; symdef++, i++) | |
3836 | { | |
3837 | struct elf_link_hash_entry *h; | |
3838 | bfd *element; | |
3839 | struct bfd_link_hash_entry *undefs_tail; | |
3840 | symindex mark; | |
3841 | ||
3842 | if (defined[i] || included[i]) | |
3843 | continue; | |
3844 | if (symdef->file_offset == last) | |
3845 | { | |
3846 | included[i] = true; | |
3847 | continue; | |
3848 | } | |
3849 | ||
3850 | h = elf_link_hash_lookup (elf_hash_table (info), symdef->name, | |
3851 | false, false, false); | |
3852 | if (h == (struct elf_link_hash_entry *) NULL) | |
3853 | continue; | |
3854 | if (h->root.type != bfd_link_hash_undefined) | |
3855 | { | |
3856 | defined[i] = true; | |
3857 | continue; | |
3858 | } | |
3859 | ||
3860 | /* We need to include this archive member. */ | |
3861 | ||
3862 | element = _bfd_get_elt_at_filepos (abfd, symdef->file_offset); | |
3863 | if (element == (bfd *) NULL) | |
3864 | goto error_return; | |
3865 | ||
3866 | if (! bfd_check_format (element, bfd_object)) | |
3867 | goto error_return; | |
3868 | ||
3869 | /* Doublecheck that we have not included this object | |
3870 | already--it should be impossible, but there may be | |
3871 | something wrong with the archive. */ | |
3872 | if (element->archive_pass != 0) | |
3873 | { | |
3874 | bfd_set_error (bfd_error_bad_value); | |
3875 | goto error_return; | |
3876 | } | |
3877 | element->archive_pass = 1; | |
3878 | ||
3879 | undefs_tail = info->hash->undefs_tail; | |
3880 | ||
3881 | if (! (*info->callbacks->add_archive_element) (info, element, | |
3882 | symdef->name)) | |
3883 | goto error_return; | |
3884 | if (! elf_link_add_object_symbols (element, info)) | |
3885 | goto error_return; | |
3886 | ||
3887 | /* If there are any new undefined symbols, we need to make | |
3888 | another pass through the archive in order to see whether | |
3889 | they can be defined. FIXME: This isn't perfect, because | |
3890 | common symbols wind up on undefs_tail and because an | |
3891 | undefined symbol which is defined later on in this pass | |
3892 | does not require another pass. This isn't a bug, but it | |
3893 | does make the code less efficient than it could be. */ | |
3894 | if (undefs_tail != info->hash->undefs_tail) | |
3895 | loop = true; | |
3896 | ||
3897 | /* Look backward to mark all symbols from this object file | |
3898 | which we have already seen in this pass. */ | |
3899 | mark = i; | |
3900 | do | |
3901 | { | |
3902 | included[mark] = true; | |
3903 | if (mark == 0) | |
3904 | break; | |
3905 | --mark; | |
3906 | } | |
3907 | while (symdefs[mark].file_offset == symdef->file_offset); | |
3908 | ||
3909 | /* We mark subsequent symbols from this object file as we go | |
3910 | on through the loop. */ | |
3911 | last = symdef->file_offset; | |
3912 | } | |
3913 | } | |
3914 | while (loop); | |
3915 | ||
3916 | free (defined); | |
3917 | free (included); | |
3918 | ||
3919 | return true; | |
3920 | ||
3921 | error_return: | |
3922 | if (defined != (boolean *) NULL) | |
3923 | free (defined); | |
3924 | if (included != (boolean *) NULL) | |
3925 | free (included); | |
3926 | return false; | |
3927 | } | |
3928 | ||
013dec1a ILT |
3929 | /* Record a new dynamic symbol. We record the dynamic symbols as we |
3930 | read the input files, since we need to have a list of all of them | |
3931 | before we can determine the final sizes of the output sections. */ | |
3932 | ||
374d2ef9 | 3933 | INLINE boolean |
013dec1a ILT |
3934 | elf_link_record_dynamic_symbol (info, h) |
3935 | struct bfd_link_info *info; | |
3936 | struct elf_link_hash_entry *h; | |
3937 | { | |
3938 | if (h->dynindx == -1) | |
3939 | { | |
3940 | h->dynindx = elf_hash_table (info)->dynsymcount; | |
3941 | ++elf_hash_table (info)->dynsymcount; | |
3942 | h->dynstr_index = bfd_add_to_strtab (elf_hash_table (info)->dynobj, | |
3943 | elf_hash_table (info)->dynstr, | |
3944 | h->root.root.string); | |
3945 | if (h->dynstr_index == (unsigned long) -1) | |
3946 | return false; | |
3947 | } | |
3948 | ||
3949 | return true; | |
3950 | } | |
3951 | ||
6ec3bb6a ILT |
3952 | /* Add symbols from an ELF object file to the linker hash table. */ |
3953 | ||
3954 | static boolean | |
3955 | elf_link_add_object_symbols (abfd, info) | |
3956 | bfd *abfd; | |
3957 | struct bfd_link_info *info; | |
3958 | { | |
3959 | boolean (*add_symbol_hook) PARAMS ((bfd *, struct bfd_link_info *, | |
3960 | const Elf_Internal_Sym *, | |
3961 | const char **, flagword *, | |
3962 | asection **, bfd_vma *)); | |
374d2ef9 ILT |
3963 | boolean (*check_relocs) PARAMS ((bfd *, struct bfd_link_info *, |
3964 | asection *, const Elf_Internal_Rela *)); | |
6ec3bb6a ILT |
3965 | boolean collect; |
3966 | Elf_Internal_Shdr *hdr; | |
3967 | size_t symcount; | |
3968 | size_t extsymcount; | |
5315c428 | 3969 | size_t extsymoff; |
6ec3bb6a ILT |
3970 | Elf_External_Sym *buf = NULL; |
3971 | struct elf_link_hash_entry **sym_hash; | |
013dec1a ILT |
3972 | boolean dynamic; |
3973 | Elf_External_Dyn *dynbuf = NULL; | |
3974 | struct elf_link_hash_entry *weaks; | |
6ec3bb6a ILT |
3975 | Elf_External_Sym *esym; |
3976 | Elf_External_Sym *esymend; | |
3977 | ||
3978 | add_symbol_hook = get_elf_backend_data (abfd)->elf_add_symbol_hook; | |
3979 | collect = get_elf_backend_data (abfd)->collect; | |
3980 | ||
1c640609 ILT |
3981 | /* A stripped shared library might only have a dynamic symbol table, |
3982 | not a regular symbol table. In that case we can still go ahead | |
3983 | and link using the dynamic symbol table. */ | |
3984 | if (elf_onesymtab (abfd) == 0 | |
3985 | && elf_dynsymtab (abfd) != 0) | |
3986 | { | |
3987 | elf_onesymtab (abfd) = elf_dynsymtab (abfd); | |
3988 | elf_tdata (abfd)->symtab_hdr = elf_tdata (abfd)->dynsymtab_hdr; | |
3989 | } | |
3990 | ||
6ec3bb6a ILT |
3991 | hdr = &elf_tdata (abfd)->symtab_hdr; |
3992 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); | |
3993 | ||
3994 | /* The sh_info field of the symtab header tells us where the | |
3995 | external symbols start. We don't care about the local symbols at | |
3996 | this point. */ | |
5315c428 ILT |
3997 | if (elf_bad_symtab (abfd)) |
3998 | { | |
3999 | extsymcount = symcount; | |
4000 | extsymoff = 0; | |
4001 | } | |
4002 | else | |
4003 | { | |
4004 | extsymcount = symcount - hdr->sh_info; | |
4005 | extsymoff = hdr->sh_info; | |
4006 | } | |
6ec3bb6a ILT |
4007 | |
4008 | buf = (Elf_External_Sym *) malloc (extsymcount * sizeof (Elf_External_Sym)); | |
4009 | if (buf == NULL && extsymcount != 0) | |
4010 | { | |
4011 | bfd_set_error (bfd_error_no_memory); | |
4012 | goto error_return; | |
4013 | } | |
4014 | ||
013dec1a ILT |
4015 | /* We store a pointer to the hash table entry for each external |
4016 | symbol. */ | |
6ec3bb6a ILT |
4017 | sym_hash = ((struct elf_link_hash_entry **) |
4018 | bfd_alloc (abfd, | |
4019 | extsymcount * sizeof (struct elf_link_hash_entry *))); | |
4020 | if (sym_hash == NULL) | |
4021 | { | |
4022 | bfd_set_error (bfd_error_no_memory); | |
4023 | goto error_return; | |
4024 | } | |
4025 | elf_sym_hashes (abfd) = sym_hash; | |
4026 | ||
013dec1a | 4027 | if (elf_elfheader (abfd)->e_type != ET_DYN) |
8af74670 ILT |
4028 | { |
4029 | dynamic = false; | |
4030 | ||
4031 | /* If we are creating a shared library, create all the dynamic | |
4032 | sections immediately. We need to attach them to something, | |
4033 | so we attach them to this BFD, provided it is the right | |
4034 | format. FIXME: If there are no input BFD's of the same | |
4035 | format as the output, we can't make a shared library. */ | |
4036 | if (info->shared | |
4037 | && elf_hash_table (info)->dynobj == NULL | |
4038 | && abfd->xvec == info->hash->creator) | |
4039 | { | |
4040 | if (! elf_link_create_dynamic_sections (abfd, info)) | |
4041 | goto error_return; | |
4042 | elf_hash_table (info)->dynobj = abfd; | |
4043 | } | |
4044 | } | |
013dec1a ILT |
4045 | else |
4046 | { | |
4047 | asection *s; | |
4048 | const char *name; | |
4049 | unsigned long strindex; | |
4050 | ||
4051 | dynamic = true; | |
4052 | ||
374d2ef9 ILT |
4053 | /* You can't use -r against a dynamic object. Also, there's no |
4054 | hope of using a dynamic object which does not exactly match | |
4055 | the format of the output file. */ | |
013dec1a ILT |
4056 | if (info->relocateable |
4057 | || info->hash->creator != abfd->xvec) | |
4058 | { | |
4059 | bfd_set_error (bfd_error_invalid_operation); | |
4060 | goto error_return; | |
4061 | } | |
4062 | ||
4063 | /* Find the name to use in a DT_NEEDED entry that refers to this | |
4064 | object. If the object has a DT_SONAME entry, we use it. | |
c1f84521 ILT |
4065 | Otherwise, if the generic linker stuck something in |
4066 | elf_dt_needed_name, we use that. Otherwise, we just use the | |
4067 | file name. */ | |
013dec1a | 4068 | name = bfd_get_filename (abfd); |
c1f84521 ILT |
4069 | if (elf_dt_needed_name (abfd) != NULL) |
4070 | name = elf_dt_needed_name (abfd); | |
013dec1a ILT |
4071 | s = bfd_get_section_by_name (abfd, ".dynamic"); |
4072 | if (s != NULL) | |
4073 | { | |
4074 | Elf_External_Dyn *extdyn; | |
4075 | Elf_External_Dyn *extdynend; | |
4076 | ||
4077 | dynbuf = (Elf_External_Dyn *) malloc (s->_raw_size); | |
4078 | if (dynbuf == NULL) | |
4079 | { | |
4080 | bfd_set_error (bfd_error_no_memory); | |
4081 | goto error_return; | |
4082 | } | |
4083 | ||
4084 | if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, | |
4085 | (file_ptr) 0, s->_raw_size)) | |
4086 | goto error_return; | |
4087 | ||
4088 | extdyn = dynbuf; | |
4089 | extdynend = extdyn + s->_raw_size / sizeof (Elf_External_Dyn); | |
4090 | for (; extdyn < extdynend; extdyn++) | |
4091 | { | |
4092 | Elf_Internal_Dyn dyn; | |
4093 | ||
4094 | elf_swap_dyn_in (abfd, extdyn, &dyn); | |
4095 | if (dyn.d_tag == DT_SONAME) | |
4096 | { | |
4097 | int elfsec; | |
4098 | unsigned long link; | |
4099 | ||
4100 | elfsec = elf_section_from_bfd_section (abfd, s); | |
4101 | if (elfsec == -1) | |
4102 | goto error_return; | |
4103 | link = elf_elfsections (abfd)[elfsec]->sh_link; | |
4104 | name = elf_string_from_elf_section (abfd, link, | |
4105 | dyn.d_un.d_val); | |
4106 | if (name == NULL) | |
4107 | goto error_return; | |
4108 | ||
4109 | break; | |
4110 | } | |
4111 | } | |
4112 | ||
4113 | free (dynbuf); | |
4114 | dynbuf = NULL; | |
4115 | } | |
4116 | ||
4117 | /* We do not want to include any of the sections in a dynamic | |
4118 | object in the output file. We hack by simply clobbering the | |
4119 | list of sections in the BFD. This could be handled more | |
4120 | cleanly by, say, a new section flag; the existing | |
4121 | SEC_NEVER_LOAD flag is not the one we want, because that one | |
4122 | still implies that the section takes up space in the output | |
4123 | file. */ | |
4124 | abfd->sections = NULL; | |
4125 | ||
4126 | /* If this is the first dynamic object found in the link, create | |
4127 | the special sections required for dynamic linking. We need | |
4128 | to put them somewhere, and attaching them to the first | |
4129 | dynamic object is as good place as any. */ | |
4130 | if (elf_hash_table (info)->dynobj == NULL) | |
4131 | { | |
4132 | if (! elf_link_create_dynamic_sections (abfd, info)) | |
4133 | goto error_return; | |
4134 | elf_hash_table (info)->dynobj = abfd; | |
4135 | } | |
4136 | ||
4137 | /* Add a DT_NEEDED entry for this dynamic object. */ | |
4138 | strindex = bfd_add_to_strtab (abfd, | |
4139 | elf_hash_table (info)->dynstr, | |
4140 | name); | |
013dec1a ILT |
4141 | if (strindex == (unsigned long) -1) |
4142 | goto error_return; | |
4143 | if (! elf_add_dynamic_entry (info, DT_NEEDED, strindex)) | |
4144 | goto error_return; | |
4145 | } | |
4146 | ||
6ec3bb6a | 4147 | if (bfd_seek (abfd, |
5315c428 | 4148 | hdr->sh_offset + extsymoff * sizeof (Elf_External_Sym), |
6ec3bb6a ILT |
4149 | SEEK_SET) != 0 |
4150 | || (bfd_read ((PTR) buf, sizeof (Elf_External_Sym), extsymcount, abfd) | |
4151 | != extsymcount * sizeof (Elf_External_Sym))) | |
4152 | goto error_return; | |
4153 | ||
013dec1a ILT |
4154 | weaks = NULL; |
4155 | ||
6ec3bb6a ILT |
4156 | esymend = buf + extsymcount; |
4157 | for (esym = buf; esym < esymend; esym++, sym_hash++) | |
4158 | { | |
4159 | Elf_Internal_Sym sym; | |
4160 | int bind; | |
4161 | bfd_vma value; | |
4162 | asection *sec; | |
4163 | flagword flags; | |
4164 | const char *name; | |
013dec1a ILT |
4165 | struct elf_link_hash_entry *h = NULL; |
4166 | boolean definition; | |
6ec3bb6a ILT |
4167 | |
4168 | elf_swap_symbol_in (abfd, esym, &sym); | |
4169 | ||
4170 | flags = BSF_NO_FLAGS; | |
4171 | sec = NULL; | |
4172 | value = sym.st_value; | |
4173 | *sym_hash = NULL; | |
4174 | ||
4175 | bind = ELF_ST_BIND (sym.st_info); | |
4176 | if (bind == STB_LOCAL) | |
4177 | { | |
4178 | /* This should be impossible, since ELF requires that all | |
4179 | global symbols follow all local symbols, and that sh_info | |
5315c428 ILT |
4180 | point to the first global symbol. Unfortunatealy, Irix 5 |
4181 | screws this up. */ | |
4182 | continue; | |
6ec3bb6a ILT |
4183 | } |
4184 | else if (bind == STB_GLOBAL) | |
4185 | flags = BSF_GLOBAL; | |
4186 | else if (bind == STB_WEAK) | |
4187 | flags = BSF_WEAK; | |
4188 | else | |
4189 | { | |
4190 | /* Leave it up to the processor backend. */ | |
4191 | } | |
4192 | ||
4193 | if (sym.st_shndx == SHN_UNDEF) | |
badd23e3 | 4194 | sec = bfd_und_section_ptr; |
6ec3bb6a ILT |
4195 | else if (sym.st_shndx > 0 && sym.st_shndx < SHN_LORESERVE) |
4196 | { | |
4197 | sec = section_from_elf_index (abfd, sym.st_shndx); | |
4198 | if (sec == NULL) | |
4199 | goto error_return; | |
4200 | value -= sec->vma; | |
4201 | } | |
4202 | else if (sym.st_shndx == SHN_ABS) | |
badd23e3 | 4203 | sec = bfd_abs_section_ptr; |
6ec3bb6a ILT |
4204 | else if (sym.st_shndx == SHN_COMMON) |
4205 | { | |
badd23e3 | 4206 | sec = bfd_com_section_ptr; |
6ec3bb6a ILT |
4207 | /* What ELF calls the size we call the value. What ELF |
4208 | calls the value we call the alignment. */ | |
4209 | value = sym.st_size; | |
4210 | } | |
4211 | else | |
4212 | { | |
4213 | /* Leave it up to the processor backend. */ | |
4214 | } | |
4215 | ||
4216 | name = elf_string_from_elf_section (abfd, hdr->sh_link, sym.st_name); | |
4217 | if (name == (const char *) NULL) | |
4218 | goto error_return; | |
4219 | ||
4220 | if (add_symbol_hook) | |
4221 | { | |
4222 | if (! (*add_symbol_hook) (abfd, info, &sym, &name, &flags, &sec, | |
4223 | &value)) | |
4224 | goto error_return; | |
4225 | ||
4226 | /* The hook function sets the name to NULL if this symbol | |
4227 | should be skipped for some reason. */ | |
4228 | if (name == (const char *) NULL) | |
4229 | continue; | |
4230 | } | |
4231 | ||
4232 | /* Sanity check that all possibilities were handled. */ | |
4233 | if (flags == BSF_NO_FLAGS || sec == (asection *) NULL) | |
4234 | { | |
4235 | bfd_set_error (bfd_error_bad_value); | |
4236 | goto error_return; | |
4237 | } | |
4238 | ||
badd23e3 | 4239 | if (bfd_is_und_section (sec) |
013dec1a ILT |
4240 | || bfd_is_com_section (sec)) |
4241 | definition = false; | |
4242 | else | |
4243 | definition = true; | |
4244 | ||
4245 | if (info->hash->creator->flavour == bfd_target_elf_flavour) | |
4246 | { | |
4247 | /* We need to look up the symbol now in order to get some of | |
4248 | the dynamic object handling right. We pass the hash | |
4249 | table entry in to _bfd_generic_link_add_one_symbol so | |
4250 | that it does not have to look it up again. */ | |
4251 | h = elf_link_hash_lookup (elf_hash_table (info), name, | |
4252 | true, false, false); | |
4253 | if (h == NULL) | |
4254 | goto error_return; | |
4255 | *sym_hash = h; | |
4256 | ||
4257 | /* If we are looking at a dynamic object, and this is a | |
4258 | definition, we need to see if it has already been defined | |
4259 | by some other object. If it has, we want to use the | |
4260 | existing definition, and we do not want to report a | |
4261 | multiple symbol definition error; we do this by | |
badd23e3 | 4262 | clobbering sec to be bfd_und_section_ptr. */ |
013dec1a ILT |
4263 | if (dynamic && definition) |
4264 | { | |
4265 | if (h->root.type == bfd_link_hash_defined) | |
badd23e3 | 4266 | sec = bfd_und_section_ptr; |
013dec1a ILT |
4267 | } |
4268 | ||
4269 | /* Similarly, if we are not looking at a dynamic object, and | |
4270 | we have a definition, we want to override any definition | |
4271 | we may have from a dynamic object. Symbols from regular | |
4272 | files always take precedence over symbols from dynamic | |
4273 | objects, even if they are defined after the dynamic | |
4274 | object in the link. */ | |
4275 | if (! dynamic | |
4276 | && definition | |
4277 | && h->root.type == bfd_link_hash_defined | |
4278 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
4279 | && (bfd_get_flavour (h->root.u.def.section->owner) | |
4280 | == bfd_target_elf_flavour) | |
4281 | && (elf_elfheader (h->root.u.def.section->owner)->e_type | |
4282 | == ET_DYN)) | |
4283 | { | |
4284 | /* Change the hash table entry to undefined, and let | |
4285 | _bfd_generic_link_add_one_symbol do the right thing | |
4286 | with the new definition. */ | |
4287 | h->root.type = bfd_link_hash_undefined; | |
4288 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
bf73e4f3 | 4289 | h->elf_link_hash_flags &=~ ELF_LINK_HASH_DEFINED_WEAK; |
013dec1a | 4290 | } |
bf73e4f3 ILT |
4291 | |
4292 | /* If this is a weak definition which we are going to use, | |
4293 | and the symbol is currently undefined, record that the | |
4294 | definition is weak. */ | |
4295 | if (definition | |
4296 | && (flags & BSF_WEAK) != 0 | |
4297 | && ! bfd_is_und_section (sec) | |
4298 | && (h->root.type == bfd_link_hash_new | |
4299 | || h->root.type == bfd_link_hash_undefined | |
4300 | || h->root.type == bfd_link_hash_weak)) | |
4301 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEFINED_WEAK; | |
013dec1a ILT |
4302 | } |
4303 | ||
4304 | if (! (_bfd_generic_link_add_one_symbol | |
4305 | (info, abfd, name, flags, sec, value, (const char *) NULL, | |
4306 | false, collect, (struct bfd_link_hash_entry **) sym_hash))) | |
6ec3bb6a ILT |
4307 | goto error_return; |
4308 | ||
013dec1a ILT |
4309 | if (dynamic |
4310 | && definition | |
4311 | && (flags & BSF_WEAK) != 0 | |
4312 | && ELF_ST_TYPE (sym.st_info) != STT_FUNC | |
4313 | && (*sym_hash)->weakdef == NULL) | |
4314 | { | |
4315 | /* Keep a list of all weak defined non function symbols from | |
4316 | a dynamic object, using the weakdef field. Later in this | |
4317 | function we will set the weakdef field to the correct | |
4318 | value. We only put non-function symbols from dynamic | |
4319 | objects on this list, because that happens to be the only | |
4320 | time we need to know the normal symbol corresponding to a | |
4321 | weak symbol, and the information is time consuming to | |
4322 | figure out. If the weakdef field is not already NULL, | |
4323 | then this symbol was already defined by some previous | |
4324 | dynamic object, and we will be using that previous | |
4325 | definition anyhow. */ | |
4326 | ||
4327 | (*sym_hash)->weakdef = weaks; | |
4328 | weaks = *sym_hash; | |
4329 | } | |
4330 | ||
374d2ef9 | 4331 | /* Get the alignment of a common symbol. */ |
7c6da9ca ILT |
4332 | if (sym.st_shndx == SHN_COMMON |
4333 | && h->root.type == bfd_link_hash_common) | |
4334 | h->root.u.c.alignment_power = bfd_log2 (sym.st_value); | |
4335 | ||
6ec3bb6a ILT |
4336 | if (info->hash->creator->flavour == bfd_target_elf_flavour) |
4337 | { | |
013dec1a ILT |
4338 | int old_flags; |
4339 | boolean dynsym; | |
4340 | int new_flag; | |
4341 | ||
374d2ef9 | 4342 | /* Remember the symbol size and type. */ |
6ec3bb6a ILT |
4343 | if (sym.st_size != 0) |
4344 | { | |
4345 | /* FIXME: We should probably somehow give a warning if | |
4346 | the symbol size changes. */ | |
013dec1a | 4347 | h->size = sym.st_size; |
6ec3bb6a | 4348 | } |
6ec3bb6a ILT |
4349 | if (ELF_ST_TYPE (sym.st_info) != STT_NOTYPE) |
4350 | { | |
4351 | /* FIXME: We should probably somehow give a warning if | |
4352 | the symbol type changes. */ | |
013dec1a ILT |
4353 | h->type = ELF_ST_TYPE (sym.st_info); |
4354 | } | |
4355 | ||
4356 | /* Set a flag in the hash table entry indicating the type of | |
4357 | reference or definition we just found. Keep a count of | |
4358 | the number of dynamic symbols we find. A dynamic symbol | |
4359 | is one which is referenced or defined by both a regular | |
4360 | object and a shared object, or one which is referenced or | |
4361 | defined by more than one shared object. */ | |
4362 | old_flags = h->elf_link_hash_flags; | |
4363 | dynsym = false; | |
4364 | if (! dynamic) | |
4365 | { | |
4366 | if (! definition) | |
4367 | new_flag = ELF_LINK_HASH_REF_REGULAR; | |
4368 | else | |
4369 | new_flag = ELF_LINK_HASH_DEF_REGULAR; | |
374d2ef9 ILT |
4370 | if (info->shared |
4371 | || (old_flags & (ELF_LINK_HASH_DEF_DYNAMIC | |
4372 | | ELF_LINK_HASH_REF_DYNAMIC)) != 0) | |
013dec1a ILT |
4373 | dynsym = true; |
4374 | } | |
4375 | else | |
4376 | { | |
4377 | if (! definition) | |
4378 | new_flag = ELF_LINK_HASH_REF_DYNAMIC; | |
4379 | else | |
4380 | new_flag = ELF_LINK_HASH_DEF_DYNAMIC; | |
374d2ef9 ILT |
4381 | if ((old_flags & new_flag) != 0 |
4382 | || (old_flags & (ELF_LINK_HASH_DEF_REGULAR | |
4383 | | ELF_LINK_HASH_REF_REGULAR)) != 0) | |
4384 | dynsym = true; | |
013dec1a ILT |
4385 | } |
4386 | ||
4387 | h->elf_link_hash_flags |= new_flag; | |
4388 | if (dynsym && h->dynindx == -1) | |
4389 | { | |
4390 | if (! elf_link_record_dynamic_symbol (info, h)) | |
4391 | goto error_return; | |
4392 | } | |
4393 | } | |
4394 | } | |
4395 | ||
4396 | /* Now set the weakdefs field correctly for all the weak defined | |
4397 | symbols we found. The only way to do this is to search all the | |
4398 | symbols. Since we only need the information for non functions in | |
4399 | dynamic objects, that's the only time we actually put anything on | |
4400 | the list WEAKS. We need this information so that if a regular | |
4401 | object refers to a symbol defined weakly in a dynamic object, the | |
4402 | real symbol in the dynamic object is also put in the dynamic | |
4403 | symbols; we also must arrange for both symbols to point to the | |
4404 | same memory location. We could handle the general case of symbol | |
4405 | aliasing, but a general symbol alias can only be generated in | |
4406 | assembler code, handling it correctly would be very time | |
4407 | consuming, and other ELF linkers don't handle general aliasing | |
4408 | either. */ | |
4409 | while (weaks != NULL) | |
4410 | { | |
4411 | struct elf_link_hash_entry *hlook; | |
4412 | asection *slook; | |
4413 | bfd_vma vlook; | |
4414 | struct elf_link_hash_entry **hpp; | |
4415 | struct elf_link_hash_entry **hppend; | |
4416 | ||
4417 | hlook = weaks; | |
4418 | weaks = hlook->weakdef; | |
4419 | hlook->weakdef = NULL; | |
4420 | ||
4421 | BFD_ASSERT (hlook->root.type == bfd_link_hash_defined); | |
4422 | slook = hlook->root.u.def.section; | |
4423 | vlook = hlook->root.u.def.value; | |
4424 | ||
4425 | hpp = elf_sym_hashes (abfd); | |
4426 | hppend = hpp + extsymcount; | |
4427 | for (; hpp < hppend; hpp++) | |
4428 | { | |
4429 | struct elf_link_hash_entry *h; | |
4430 | ||
4431 | h = *hpp; | |
4432 | if (h != hlook | |
4433 | && h->root.type == bfd_link_hash_defined | |
4434 | && h->root.u.def.section == slook | |
4435 | && h->root.u.def.value == vlook) | |
4436 | { | |
4437 | hlook->weakdef = h; | |
4438 | ||
4439 | /* If the weak definition is in the list of dynamic | |
4440 | symbols, make sure the real definition is put there | |
4441 | as well. */ | |
4442 | if (hlook->dynindx != -1 | |
4443 | && h->dynindx == -1) | |
4444 | { | |
4445 | if (! elf_link_record_dynamic_symbol (info, h)) | |
4446 | goto error_return; | |
4447 | } | |
4448 | ||
4449 | break; | |
6ec3bb6a ILT |
4450 | } |
4451 | } | |
4452 | } | |
4453 | ||
4454 | if (buf != NULL) | |
374d2ef9 ILT |
4455 | { |
4456 | free (buf); | |
4457 | buf = NULL; | |
4458 | } | |
4459 | ||
4460 | /* If this object is the same format as the output object, and it is | |
4461 | not a shared library, then let the backend look through the | |
4462 | relocs. | |
4463 | ||
4464 | This is required to build global offset table entries and to | |
4465 | arrange for dynamic relocs. It is not required for the | |
4466 | particular common case of linking non PIC code, even when linking | |
4467 | against shared libraries, but unfortunately there is no way of | |
4468 | knowing whether an object file has been compiled PIC or not. | |
4469 | Looking through the relocs is not particularly time consuming. | |
4470 | The problem is that we must either (1) keep the relocs in memory, | |
4471 | which causes the linker to require additional runtime memory or | |
4472 | (2) read the relocs twice from the input file, which wastes time. | |
4473 | This would be a good case for using mmap. | |
4474 | ||
4475 | I have no idea how to handle linking PIC code into a file of a | |
4476 | different format. It probably can't be done. */ | |
4477 | check_relocs = get_elf_backend_data (abfd)->check_relocs; | |
4478 | if (! dynamic | |
4479 | && abfd->xvec == info->hash->creator | |
4480 | && check_relocs != NULL) | |
4481 | { | |
4482 | asection *o; | |
4483 | ||
4484 | for (o = abfd->sections; o != NULL; o = o->next) | |
4485 | { | |
4486 | Elf_Internal_Rela *internal_relocs; | |
4487 | boolean ok; | |
4488 | ||
4489 | if ((o->flags & SEC_RELOC) == 0 | |
4490 | || o->reloc_count == 0) | |
4491 | continue; | |
4492 | ||
4493 | /* I believe we can ignore the relocs for any section which | |
4494 | does not form part of the final process image, such as a | |
4495 | debugging section. */ | |
4496 | if ((o->flags & SEC_ALLOC) == 0) | |
4497 | continue; | |
4498 | ||
4499 | internal_relocs = elf_link_read_relocs (abfd, o, (PTR) NULL, | |
4500 | (Elf_Internal_Rela *) NULL, | |
4501 | info->keep_memory); | |
4502 | if (internal_relocs == NULL) | |
4503 | goto error_return; | |
4504 | ||
4505 | ok = (*check_relocs) (abfd, info, o, internal_relocs); | |
4506 | ||
4507 | if (! info->keep_memory) | |
4508 | free (internal_relocs); | |
4509 | ||
4510 | if (! ok) | |
4511 | goto error_return; | |
4512 | } | |
4513 | } | |
6ec3bb6a ILT |
4514 | |
4515 | return true; | |
4516 | ||
4517 | error_return: | |
4518 | if (buf != NULL) | |
4519 | free (buf); | |
013dec1a ILT |
4520 | if (dynbuf != NULL) |
4521 | free (dynbuf); | |
6ec3bb6a ILT |
4522 | return false; |
4523 | } | |
013dec1a ILT |
4524 | |
4525 | /* Create some sections which will be filled in with dynamic linking | |
4526 | information. The ABFD argument is an input file which is a dynamic | |
4527 | object. The dynamic sections take up virtual memory space when the | |
4528 | final executable is run, so we need to create them before addresses | |
4529 | are assigned to the output sections. We work out the actual | |
4530 | contents and size of these sections later. */ | |
4531 | ||
374d2ef9 | 4532 | boolean |
013dec1a ILT |
4533 | elf_link_create_dynamic_sections (abfd, info) |
4534 | bfd *abfd; | |
4535 | struct bfd_link_info *info; | |
4536 | { | |
4537 | flagword flags; | |
4538 | register asection *s; | |
4539 | struct elf_link_hash_entry *h; | |
4540 | struct elf_backend_data *bed; | |
4541 | ||
4542 | /* Note that we set the SEC_IN_MEMORY flag for all of these | |
4543 | sections. */ | |
4544 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY; | |
4545 | ||
8af74670 ILT |
4546 | /* A dynamically linked executable has a .interp section, but a |
4547 | shared library does not. */ | |
4548 | if (! info->shared) | |
4549 | { | |
4550 | s = bfd_make_section (abfd, ".interp"); | |
4551 | if (s == NULL | |
4552 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)) | |
4553 | return false; | |
4554 | } | |
013dec1a | 4555 | |
374d2ef9 ILT |
4556 | s = bfd_make_section (abfd, ".dynsym"); |
4557 | if (s == NULL | |
4558 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
4559 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
4560 | return false; | |
4561 | ||
4562 | /* The first .dynsym symbol is a dummy. */ | |
4563 | elf_hash_table (info)->dynsymcount = 1; | |
4564 | ||
4565 | s = bfd_make_section (abfd, ".dynstr"); | |
4566 | if (s == NULL | |
4567 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)) | |
4568 | return false; | |
4569 | ||
4570 | /* Create a strtab to hold the dynamic symbol names. */ | |
4571 | elf_hash_table (info)->dynstr = bfd_new_strtab (abfd); | |
4572 | if (elf_hash_table (info)->dynstr == NULL) | |
4573 | return false; | |
4574 | ||
013dec1a ILT |
4575 | s = bfd_make_section (abfd, ".dynamic"); |
4576 | if (s == NULL | |
4577 | || ! bfd_set_section_flags (abfd, s, flags) | |
4578 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
4579 | return false; | |
4580 | ||
4581 | /* The special symbol _DYNAMIC is always set to the start of the | |
4582 | .dynamic section. This call occurs before we have processed the | |
4583 | symbols for any dynamic object, so we don't have to worry about | |
4584 | overriding a dynamic definition. We could set _DYNAMIC in a | |
4585 | linker script, but we only want to define it if we are, in fact, | |
4586 | creating a .dynamic section. We don't want to define it if there | |
4587 | is no .dynamic section, since on some ELF platforms the start up | |
4588 | code examines it to decide how to initialize the process. */ | |
4589 | h = NULL; | |
4590 | if (! (_bfd_generic_link_add_one_symbol | |
4591 | (info, abfd, "_DYNAMIC", BSF_GLOBAL, s, (bfd_vma) 0, | |
4592 | (const char *) NULL, false, get_elf_backend_data (abfd)->collect, | |
4593 | (struct bfd_link_hash_entry **) &h))) | |
4594 | return false; | |
4595 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
99dd7754 JMD |
4596 | h->type = STT_OBJECT; |
4597 | ||
374d2ef9 ILT |
4598 | if (info->shared |
4599 | && ! elf_link_record_dynamic_symbol (info, h)) | |
013dec1a ILT |
4600 | return false; |
4601 | ||
4602 | s = bfd_make_section (abfd, ".hash"); | |
4603 | if (s == NULL | |
4604 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
4605 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
4606 | return false; | |
4607 | ||
4608 | /* Let the backend create the rest of the sections. This lets the | |
4609 | backend set the right flags. The backend will normally create | |
4610 | the .got and .plt sections. */ | |
4611 | bed = get_elf_backend_data (abfd); | |
4612 | return (*bed->elf_backend_create_dynamic_sections) (abfd, info); | |
4613 | } | |
4614 | ||
4615 | /* Add an entry to the .dynamic table. */ | |
4616 | ||
4617 | boolean | |
4618 | elf_add_dynamic_entry (info, tag, val) | |
4619 | struct bfd_link_info *info; | |
4620 | bfd_vma tag; | |
4621 | bfd_vma val; | |
4622 | { | |
4623 | Elf_Internal_Dyn dyn; | |
4624 | bfd *dynobj; | |
4625 | asection *s; | |
4626 | size_t newsize; | |
4627 | bfd_byte *newcontents; | |
4628 | ||
4629 | dynobj = elf_hash_table (info)->dynobj; | |
4630 | ||
4631 | s = bfd_get_section_by_name (dynobj, ".dynamic"); | |
4632 | BFD_ASSERT (s != NULL); | |
4633 | ||
4634 | newsize = s->_raw_size + sizeof (Elf_External_Dyn); | |
4635 | if (s->contents == NULL) | |
4636 | newcontents = (bfd_byte *) malloc (newsize); | |
4637 | else | |
4638 | newcontents = (bfd_byte *) realloc (s->contents, newsize); | |
4639 | if (newcontents == NULL) | |
4640 | { | |
4641 | bfd_set_error (bfd_error_no_memory); | |
4642 | return false; | |
4643 | } | |
4644 | ||
4645 | dyn.d_tag = tag; | |
4646 | dyn.d_un.d_val = val; | |
4647 | elf_swap_dyn_out (dynobj, &dyn, | |
4648 | (Elf_External_Dyn *) (newcontents + s->_raw_size)); | |
4649 | ||
4650 | s->_raw_size = newsize; | |
4651 | s->contents = newcontents; | |
4652 | ||
4653 | return true; | |
4654 | } | |
4655 | ||
374d2ef9 ILT |
4656 | /* Read and swap the relocs for a section. They may have been cached. |
4657 | If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are not NULL, | |
4658 | they are used as buffers to read into. They are known to be large | |
4659 | enough. If the INTERNAL_RELOCS relocs argument is NULL, the return | |
4660 | value is allocated using either malloc or bfd_alloc, according to | |
4661 | the KEEP_MEMORY argument. */ | |
4662 | ||
4663 | static Elf_Internal_Rela * | |
4664 | elf_link_read_relocs (abfd, o, external_relocs, internal_relocs, keep_memory) | |
4665 | bfd *abfd; | |
4666 | asection *o; | |
4667 | PTR external_relocs; | |
4668 | Elf_Internal_Rela *internal_relocs; | |
4669 | boolean keep_memory; | |
4670 | { | |
4671 | Elf_Internal_Shdr *rel_hdr; | |
4672 | PTR alloc1 = NULL; | |
4673 | Elf_Internal_Rela *alloc2 = NULL; | |
4674 | ||
4675 | if (elf_section_data (o)->relocs != NULL) | |
4676 | return elf_section_data (o)->relocs; | |
4677 | ||
4678 | if (o->reloc_count == 0) | |
4679 | return NULL; | |
4680 | ||
4681 | rel_hdr = &elf_section_data (o)->rel_hdr; | |
4682 | ||
4683 | if (internal_relocs == NULL) | |
4684 | { | |
4685 | size_t size; | |
4686 | ||
4687 | size = o->reloc_count * sizeof (Elf_Internal_Rela); | |
4688 | if (keep_memory) | |
4689 | internal_relocs = (Elf_Internal_Rela *) bfd_alloc (abfd, size); | |
4690 | else | |
4691 | internal_relocs = alloc2 = (Elf_Internal_Rela *) malloc (size); | |
4692 | if (internal_relocs == NULL) | |
4693 | { | |
4694 | bfd_set_error (bfd_error_no_memory); | |
4695 | goto error_return; | |
4696 | } | |
4697 | } | |
4698 | ||
4699 | if (external_relocs == NULL) | |
4700 | { | |
4701 | alloc1 = (PTR) malloc (rel_hdr->sh_size); | |
4702 | if (alloc1 == NULL) | |
4703 | { | |
4704 | bfd_set_error (bfd_error_no_memory); | |
4705 | goto error_return; | |
4706 | } | |
4707 | external_relocs = alloc1; | |
4708 | } | |
4709 | ||
4710 | if ((bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0) | |
4711 | || (bfd_read (external_relocs, 1, rel_hdr->sh_size, abfd) | |
4712 | != rel_hdr->sh_size)) | |
4713 | goto error_return; | |
4714 | ||
4715 | /* Swap in the relocs. For convenience, we always produce an | |
4716 | Elf_Internal_Rela array; if the relocs are Rel, we set the addend | |
4717 | to 0. */ | |
4718 | if (rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) | |
4719 | { | |
4720 | Elf_External_Rel *erel; | |
4721 | Elf_External_Rel *erelend; | |
4722 | Elf_Internal_Rela *irela; | |
4723 | ||
4724 | erel = (Elf_External_Rel *) external_relocs; | |
4725 | erelend = erel + o->reloc_count; | |
4726 | irela = internal_relocs; | |
4727 | for (; erel < erelend; erel++, irela++) | |
4728 | { | |
4729 | Elf_Internal_Rel irel; | |
4730 | ||
4731 | elf_swap_reloc_in (abfd, erel, &irel); | |
4732 | irela->r_offset = irel.r_offset; | |
4733 | irela->r_info = irel.r_info; | |
4734 | irela->r_addend = 0; | |
4735 | } | |
4736 | } | |
4737 | else | |
4738 | { | |
4739 | Elf_External_Rela *erela; | |
4740 | Elf_External_Rela *erelaend; | |
4741 | Elf_Internal_Rela *irela; | |
4742 | ||
4743 | BFD_ASSERT (rel_hdr->sh_entsize == sizeof (Elf_External_Rela)); | |
4744 | ||
4745 | erela = (Elf_External_Rela *) external_relocs; | |
4746 | erelaend = erela + o->reloc_count; | |
4747 | irela = internal_relocs; | |
4748 | for (; erela < erelaend; erela++, irela++) | |
4749 | elf_swap_reloca_in (abfd, erela, irela); | |
4750 | } | |
4751 | ||
4752 | /* Cache the results for next time, if we can. */ | |
4753 | if (keep_memory) | |
4754 | elf_section_data (o)->relocs = internal_relocs; | |
4755 | ||
4756 | if (alloc1 != NULL) | |
4757 | free (alloc1); | |
4758 | ||
4759 | /* Don't free alloc2, since if it was allocated we are passing it | |
4760 | back (under the name of internal_relocs). */ | |
4761 | ||
4762 | return internal_relocs; | |
4763 | ||
4764 | error_return: | |
4765 | if (alloc1 != NULL) | |
4766 | free (alloc1); | |
4767 | if (alloc2 != NULL) | |
4768 | free (alloc2); | |
4769 | return NULL; | |
4770 | } | |
4771 | ||
013dec1a ILT |
4772 | /* Record an assignment to a symbol made by a linker script. We need |
4773 | this in case some dynamic object refers to this symbol. */ | |
4774 | ||
4775 | /*ARGSUSED*/ | |
4776 | boolean | |
4777 | NAME(bfd_elf,record_link_assignment) (output_bfd, info, name) | |
4778 | bfd *output_bfd; | |
4779 | struct bfd_link_info *info; | |
4780 | const char *name; | |
4781 | { | |
4782 | struct elf_link_hash_entry *h; | |
4783 | ||
99dd7754 | 4784 | h = elf_link_hash_lookup (elf_hash_table (info), name, true, true, false); |
013dec1a | 4785 | if (h == NULL) |
99dd7754 | 4786 | return false; |
013dec1a ILT |
4787 | |
4788 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
99dd7754 | 4789 | h->type = STT_OBJECT; |
013dec1a | 4790 | |
374d2ef9 ILT |
4791 | if (((h->elf_link_hash_flags & (ELF_LINK_HASH_DEF_DYNAMIC |
4792 | | ELF_LINK_HASH_REF_DYNAMIC)) != 0 | |
4793 | || info->shared) | |
013dec1a ILT |
4794 | && h->dynindx == -1) |
4795 | { | |
4796 | if (! elf_link_record_dynamic_symbol (info, h)) | |
4797 | return false; | |
4798 | ||
4799 | /* If this is a weak defined symbol, and we know a corresponding | |
4800 | real symbol from the same dynamic object, make sure the real | |
4801 | symbol is also made into a dynamic symbol. */ | |
4802 | if (h->weakdef != NULL | |
4803 | && h->weakdef->dynindx == -1) | |
4804 | { | |
4805 | if (! elf_link_record_dynamic_symbol (info, h->weakdef)) | |
4806 | return false; | |
4807 | } | |
4808 | } | |
4809 | ||
4810 | return true; | |
4811 | } | |
4812 | ||
4813 | /* Array used to determine the number of hash table buckets to use | |
4814 | based on the number of symbols there are. If there are fewer than | |
4815 | 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets, | |
4816 | fewer than 37 we use 17 buckets, and so forth. We never use more | |
4817 | than 521 buckets. */ | |
4818 | ||
4819 | static const size_t elf_buckets[] = | |
4820 | { | |
4821 | 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 0 | |
4822 | }; | |
4823 | ||
4824 | /* Set up the sizes and contents of the ELF dynamic sections. This is | |
4825 | called by the ELF linker emulation before_allocation routine. We | |
4826 | must set the sizes of the sections before the linker sets the | |
4827 | addresses of the various sections. */ | |
4828 | ||
4829 | boolean | |
0822b56d ILT |
4830 | NAME(bfd_elf,size_dynamic_sections) (output_bfd, soname, rpath, info, |
4831 | sinterpptr) | |
013dec1a | 4832 | bfd *output_bfd; |
0822b56d | 4833 | const char *soname; |
f9779aad | 4834 | const char *rpath; |
013dec1a | 4835 | struct bfd_link_info *info; |
7c726b66 | 4836 | asection **sinterpptr; |
013dec1a ILT |
4837 | { |
4838 | bfd *dynobj; | |
4839 | size_t dynsymcount; | |
4840 | asection *s; | |
4841 | Elf_Internal_Sym isym; | |
4842 | size_t i; | |
4843 | size_t bucketcount; | |
4844 | struct elf_backend_data *bed; | |
4845 | ||
7c726b66 ILT |
4846 | *sinterpptr = NULL; |
4847 | ||
013dec1a ILT |
4848 | dynobj = elf_hash_table (info)->dynobj; |
4849 | dynsymcount = elf_hash_table (info)->dynsymcount; | |
4850 | ||
4851 | /* If there were no dynamic objects in the link, there is nothing to | |
4852 | do here. */ | |
4853 | if (dynobj == NULL) | |
4854 | return true; | |
4855 | ||
7c726b66 | 4856 | *sinterpptr = bfd_get_section_by_name (dynobj, ".interp"); |
8af74670 | 4857 | BFD_ASSERT (*sinterpptr != NULL || info->shared); |
7c726b66 | 4858 | |
013dec1a ILT |
4859 | /* Set the size of the .dynsym and .hash sections. We counted the |
4860 | number of dynamic symbols in elf_link_add_object_symbols. We | |
4861 | will build the contents of .dynsym and .hash when we build the | |
4862 | final symbol table, because until then we do not know the correct | |
4863 | value to give the symbols. We built the .dynstr section as we | |
4864 | went along in elf_link_add_object_symbols. */ | |
4865 | s = bfd_get_section_by_name (dynobj, ".dynsym"); | |
4866 | BFD_ASSERT (s != NULL); | |
4867 | s->_raw_size = dynsymcount * sizeof (Elf_External_Sym); | |
4868 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size); | |
4869 | if (s->contents == NULL && s->_raw_size != 0) | |
4870 | { | |
4871 | bfd_set_error (bfd_error_no_memory); | |
4872 | return false; | |
4873 | } | |
4874 | ||
4875 | /* The first entry in .dynsym is a dummy symbol. */ | |
4876 | isym.st_value = 0; | |
4877 | isym.st_size = 0; | |
4878 | isym.st_name = 0; | |
4879 | isym.st_info = 0; | |
4880 | isym.st_other = 0; | |
4881 | isym.st_shndx = 0; | |
4882 | elf_swap_symbol_out (output_bfd, &isym, | |
4883 | (Elf_External_Sym *) s->contents); | |
4884 | ||
4885 | for (i = 0; elf_buckets[i] != 0; i++) | |
4886 | { | |
4887 | bucketcount = elf_buckets[i]; | |
4888 | if (dynsymcount < elf_buckets[i + 1]) | |
4889 | break; | |
4890 | } | |
4891 | ||
4892 | s = bfd_get_section_by_name (dynobj, ".hash"); | |
4893 | BFD_ASSERT (s != NULL); | |
4894 | s->_raw_size = (2 + bucketcount + dynsymcount) * (ARCH_SIZE / 8); | |
4895 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size); | |
4896 | if (s->contents == NULL) | |
4897 | { | |
4898 | bfd_set_error (bfd_error_no_memory); | |
4899 | return false; | |
4900 | } | |
4901 | memset (s->contents, 0, s->_raw_size); | |
4902 | ||
4903 | put_word (output_bfd, bucketcount, s->contents); | |
4904 | put_word (output_bfd, dynsymcount, s->contents + (ARCH_SIZE / 8)); | |
4905 | ||
4906 | elf_hash_table (info)->bucketcount = bucketcount; | |
4907 | ||
0822b56d ILT |
4908 | if (soname != NULL) |
4909 | { | |
4910 | unsigned long indx; | |
4911 | ||
4912 | indx = bfd_add_to_strtab (dynobj, elf_hash_table (info)->dynstr, soname); | |
4913 | if (indx == (unsigned long) -1 | |
4914 | || ! elf_add_dynamic_entry (info, DT_SONAME, indx)) | |
4915 | return false; | |
4916 | } | |
4917 | ||
f9779aad ILT |
4918 | if (rpath != NULL) |
4919 | { | |
4920 | unsigned long indx; | |
4921 | ||
4922 | indx = bfd_add_to_strtab (dynobj, elf_hash_table (info)->dynstr, rpath); | |
4923 | if (indx == (unsigned long) -1 | |
4924 | || ! elf_add_dynamic_entry (info, DT_RPATH, indx)) | |
4925 | return false; | |
4926 | } | |
4927 | ||
013dec1a ILT |
4928 | s = bfd_get_section_by_name (dynobj, ".dynstr"); |
4929 | BFD_ASSERT (s != NULL); | |
4930 | s->_raw_size = elf_hash_table (info)->dynstr->length; | |
4931 | s->contents = (unsigned char *) elf_hash_table (info)->dynstr->tab; | |
4932 | ||
4933 | /* Find all symbols which were defined in a dynamic object and make | |
4934 | the backend pick a reasonable value for them. */ | |
4935 | elf_link_hash_traverse (elf_hash_table (info), | |
4936 | elf_adjust_dynamic_symbol, | |
4937 | (PTR) info); | |
4938 | ||
4939 | /* Add some entries to the .dynamic section. We fill in some of the | |
4940 | values later, in elf_bfd_final_link, but we must add the entries | |
4941 | now so that we know the final size of the .dynamic section. */ | |
4942 | if (bfd_get_section_by_name (output_bfd, ".init") != NULL) | |
4943 | { | |
4944 | if (! elf_add_dynamic_entry (info, DT_INIT, 0)) | |
4945 | return false; | |
4946 | } | |
4947 | if (bfd_get_section_by_name (output_bfd, ".fini") != NULL) | |
4948 | { | |
4949 | if (! elf_add_dynamic_entry (info, DT_FINI, 0)) | |
4950 | return false; | |
4951 | } | |
4952 | if (! elf_add_dynamic_entry (info, DT_HASH, 0) | |
4953 | || ! elf_add_dynamic_entry (info, DT_STRTAB, 0) | |
4954 | || ! elf_add_dynamic_entry (info, DT_SYMTAB, 0) | |
4955 | || ! elf_add_dynamic_entry (info, DT_STRSZ, | |
4956 | elf_hash_table (info)->dynstr->length) | |
4957 | || ! elf_add_dynamic_entry (info, DT_SYMENT, | |
4958 | sizeof (Elf_External_Sym))) | |
4959 | return false; | |
4960 | ||
4961 | /* The backend must work out the sizes of all the other dynamic | |
4962 | sections. */ | |
4963 | bed = get_elf_backend_data (output_bfd); | |
4964 | if (! (*bed->elf_backend_size_dynamic_sections) (output_bfd, info)) | |
4965 | return false; | |
4966 | ||
4967 | return elf_add_dynamic_entry (info, DT_NULL, 0); | |
4968 | } | |
4969 | ||
4970 | /* Make the backend pick a good value for a dynamic symbol. This is | |
4971 | called via elf_link_hash_traverse, and also calls itself | |
4972 | recursively. */ | |
4973 | ||
4974 | static boolean | |
4975 | elf_adjust_dynamic_symbol (h, data) | |
4976 | struct elf_link_hash_entry *h; | |
4977 | PTR data; | |
4978 | { | |
4979 | struct bfd_link_info *info = (struct bfd_link_info *) data; | |
4980 | bfd *dynobj; | |
4981 | struct elf_backend_data *bed; | |
4982 | ||
4983 | /* If this symbol is not defined by a dynamic object, or is not | |
4984 | referenced by a regular object, ignore it. FIXME: Do we need to | |
4985 | worry about symbols which are defined by one dynamic object and | |
4986 | referenced by another one? */ | |
4987 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 | |
4988 | || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
4989 | || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) | |
4990 | return true; | |
4991 | ||
4992 | /* If we've already adjusted this symbol, don't do it again. This | |
4993 | can happen via a recursive call. */ | |
4994 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0) | |
4995 | return true; | |
4996 | ||
4997 | /* Don't look at this symbol again. Note that we must set this | |
4998 | after checking the above conditions, because we may look at a | |
4999 | symbol once, decide not to do anything, and then get called | |
5000 | recursively later after REF_REGULAR is set below. */ | |
5001 | h->elf_link_hash_flags |= ELF_LINK_HASH_DYNAMIC_ADJUSTED; | |
5002 | ||
5003 | /* If this is a weak definition, and we know a real definition, and | |
5004 | the real symbol is not itself defined by a regular object file, | |
5005 | then get a good value for the real definition. We handle the | |
5006 | real symbol first, for the convenience of the backend routine. | |
5007 | ||
5008 | Note that there is a confusing case here. If the real definition | |
5009 | is defined by a regular object file, we don't get the real symbol | |
5010 | from the dynamic object, but we do get the weak symbol. If the | |
5011 | processor backend uses a COPY reloc, then if some routine in the | |
5012 | dynamic object changes the real symbol, we will not see that | |
5013 | change in the corresponding weak symbol. This is the way other | |
5014 | ELF linkers work as well, and seems to be a result of the shared | |
5015 | library model. | |
5016 | ||
5017 | I will clarify this issue. Most SVR4 shared libraries define the | |
5018 | variable _timezone and define timezone as a weak synonym. The | |
5019 | tzset call changes _timezone. If you write | |
5020 | extern int timezone; | |
5021 | int _timezone = 5; | |
5022 | int main () { tzset (); printf ("%d %d\n", timezone, _timezone); } | |
5023 | you might expect that, since timezone is a synonym for _timezone, | |
5024 | the same number will print both times. However, if the processor | |
5025 | backend uses a COPY reloc, then actually timezone will be copied | |
5026 | into your process image, and, since you define _timezone | |
5027 | yourself, _timezone will not. Thus timezone and _timezone will | |
5028 | wind up at different memory locations. The tzset call will set | |
5029 | _timezone, leaving timezone unchanged. */ | |
5030 | ||
5031 | if (h->weakdef != NULL) | |
5032 | { | |
5033 | struct elf_link_hash_entry *weakdef; | |
5034 | ||
5035 | BFD_ASSERT (h->root.type == bfd_link_hash_defined); | |
5036 | weakdef = h->weakdef; | |
5037 | BFD_ASSERT (weakdef->root.type == bfd_link_hash_defined); | |
5038 | BFD_ASSERT (weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC); | |
30e5ad97 | 5039 | if ((weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0) |
013dec1a | 5040 | { |
30e5ad97 ILT |
5041 | /* This symbol is defined by a regular object file, so we |
5042 | will not do anything special. Clear weakdef for the | |
5043 | convenience of the processor backend. */ | |
013dec1a ILT |
5044 | h->weakdef = NULL; |
5045 | } | |
5046 | else | |
5047 | { | |
5048 | /* There is an implicit reference by a regular object file | |
5049 | via the weak symbol. */ | |
5050 | weakdef->elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR; | |
5051 | if (! elf_adjust_dynamic_symbol (weakdef, (PTR) info)) | |
5052 | return false; | |
5053 | } | |
5054 | } | |
5055 | ||
5056 | dynobj = elf_hash_table (info)->dynobj; | |
5057 | bed = get_elf_backend_data (dynobj); | |
5058 | if (! (*bed->elf_backend_adjust_dynamic_symbol) (info, h)) | |
5059 | { | |
5060 | /* FIXME: No way to return error. */ | |
5061 | abort (); | |
5062 | } | |
5063 | ||
5064 | return true; | |
5065 | } | |
6ec3bb6a ILT |
5066 | \f |
5067 | /* Final phase of ELF linker. */ | |
5068 | ||
5069 | /* A structure we use to avoid passing large numbers of arguments. */ | |
5070 | ||
5071 | struct elf_final_link_info | |
5072 | { | |
5073 | /* General link information. */ | |
5074 | struct bfd_link_info *info; | |
5075 | /* Output BFD. */ | |
5076 | bfd *output_bfd; | |
5077 | /* Symbol string table. */ | |
5078 | struct strtab *symstrtab; | |
013dec1a ILT |
5079 | /* .dynsym section. */ |
5080 | asection *dynsym_sec; | |
5081 | /* .hash section. */ | |
5082 | asection *hash_sec; | |
6ec3bb6a ILT |
5083 | /* Buffer large enough to hold contents of any section. */ |
5084 | bfd_byte *contents; | |
5085 | /* Buffer large enough to hold external relocs of any section. */ | |
5086 | PTR external_relocs; | |
5087 | /* Buffer large enough to hold internal relocs of any section. */ | |
5088 | Elf_Internal_Rela *internal_relocs; | |
5089 | /* Buffer large enough to hold external local symbols of any input | |
5090 | BFD. */ | |
5091 | Elf_External_Sym *external_syms; | |
5092 | /* Buffer large enough to hold internal local symbols of any input | |
5093 | BFD. */ | |
5094 | Elf_Internal_Sym *internal_syms; | |
5095 | /* Array large enough to hold a symbol index for each local symbol | |
5096 | of any input BFD. */ | |
5097 | long *indices; | |
5098 | /* Array large enough to hold a section pointer for each local | |
5099 | symbol of any input BFD. */ | |
5100 | asection **sections; | |
5101 | /* Buffer to hold swapped out symbols. */ | |
5102 | Elf_External_Sym *symbuf; | |
5103 | /* Number of swapped out symbols in buffer. */ | |
5104 | size_t symbuf_count; | |
5105 | /* Number of symbols which fit in symbuf. */ | |
5106 | size_t symbuf_size; | |
5107 | }; | |
5108 | ||
5109 | static boolean elf_link_output_sym | |
71edd06d ILT |
5110 | PARAMS ((struct elf_final_link_info *, const char *, |
5111 | Elf_Internal_Sym *, asection *)); | |
6ec3bb6a ILT |
5112 | static boolean elf_link_flush_output_syms |
5113 | PARAMS ((struct elf_final_link_info *)); | |
5114 | static boolean elf_link_output_extsym | |
5115 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
5116 | static boolean elf_link_input_bfd | |
5117 | PARAMS ((struct elf_final_link_info *, bfd *)); | |
5118 | static boolean elf_reloc_link_order | |
5119 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
5120 | struct bfd_link_order *)); | |
5121 | ||
5122 | /* Do the final step of an ELF link. */ | |
5123 | ||
5124 | boolean | |
5125 | elf_bfd_final_link (abfd, info) | |
5126 | bfd *abfd; | |
5127 | struct bfd_link_info *info; | |
5128 | { | |
013dec1a | 5129 | bfd *dynobj; |
6ec3bb6a ILT |
5130 | struct elf_final_link_info finfo; |
5131 | register asection *o; | |
5132 | register struct bfd_link_order *p; | |
5133 | register bfd *sub; | |
5134 | size_t max_contents_size; | |
5135 | size_t max_external_reloc_size; | |
5136 | size_t max_internal_reloc_count; | |
5137 | size_t max_sym_count; | |
5138 | file_ptr off; | |
5139 | Elf_Internal_Sym elfsym; | |
013dec1a | 5140 | unsigned int i; |
6ec3bb6a ILT |
5141 | Elf_Internal_Shdr *symtab_hdr; |
5142 | Elf_Internal_Shdr *symstrtab_hdr; | |
71edd06d | 5143 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
6ec3bb6a | 5144 | |
0ff5d3a6 | 5145 | if (info->shared) |
374d2ef9 | 5146 | abfd->flags |= DYNAMIC; |
0ff5d3a6 | 5147 | |
013dec1a ILT |
5148 | dynobj = elf_hash_table (info)->dynobj; |
5149 | ||
6ec3bb6a ILT |
5150 | finfo.info = info; |
5151 | finfo.output_bfd = abfd; | |
5152 | finfo.symstrtab = bfd_new_strtab (abfd); | |
5153 | if (finfo.symstrtab == NULL) | |
5154 | return false; | |
013dec1a ILT |
5155 | if (dynobj == NULL) |
5156 | { | |
5157 | finfo.dynsym_sec = NULL; | |
5158 | finfo.hash_sec = NULL; | |
5159 | } | |
5160 | else | |
5161 | { | |
5162 | finfo.dynsym_sec = bfd_get_section_by_name (dynobj, ".dynsym"); | |
5163 | finfo.hash_sec = bfd_get_section_by_name (dynobj, ".hash"); | |
5164 | if (finfo.dynsym_sec == NULL | |
5165 | || finfo.hash_sec == NULL) | |
5166 | abort (); | |
5167 | } | |
6ec3bb6a ILT |
5168 | finfo.contents = NULL; |
5169 | finfo.external_relocs = NULL; | |
5170 | finfo.internal_relocs = NULL; | |
5171 | finfo.external_syms = NULL; | |
5172 | finfo.internal_syms = NULL; | |
5173 | finfo.indices = NULL; | |
5174 | finfo.sections = NULL; | |
5175 | finfo.symbuf = NULL; | |
5176 | finfo.symbuf_count = 0; | |
5177 | ||
5178 | /* Count up the number of relocations we will output for each output | |
5179 | section, so that we know the sizes of the reloc sections. We | |
5180 | also figure out some maximum sizes. */ | |
5181 | max_contents_size = 0; | |
5182 | max_external_reloc_size = 0; | |
5183 | max_internal_reloc_count = 0; | |
5184 | max_sym_count = 0; | |
5185 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) | |
5186 | { | |
5187 | o->reloc_count = 0; | |
5188 | ||
5189 | for (p = o->link_order_head; p != NULL; p = p->next) | |
5190 | { | |
5191 | if (p->type == bfd_section_reloc_link_order | |
5192 | || p->type == bfd_symbol_reloc_link_order) | |
5193 | ++o->reloc_count; | |
5194 | else if (p->type == bfd_indirect_link_order) | |
5195 | { | |
5196 | asection *sec; | |
5197 | ||
5198 | sec = p->u.indirect.section; | |
5199 | ||
5200 | if (info->relocateable) | |
5201 | o->reloc_count += sec->reloc_count; | |
5202 | ||
5203 | if (sec->_raw_size > max_contents_size) | |
5204 | max_contents_size = sec->_raw_size; | |
5205 | if (sec->_cooked_size > max_contents_size) | |
5206 | max_contents_size = sec->_cooked_size; | |
5207 | ||
5208 | /* We are interested in just local symbols, not all | |
5209 | symbols. */ | |
5315c428 ILT |
5210 | if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour) |
5211 | { | |
5212 | size_t sym_count; | |
5213 | ||
5214 | if (elf_bad_symtab (sec->owner)) | |
5215 | sym_count = (elf_tdata (sec->owner)->symtab_hdr.sh_size | |
5216 | / sizeof (Elf_External_Sym)); | |
5217 | else | |
5218 | sym_count = elf_tdata (sec->owner)->symtab_hdr.sh_info; | |
5219 | ||
5220 | if (sym_count > max_sym_count) | |
5221 | max_sym_count = sym_count; | |
6ec3bb6a | 5222 | |
6c8fa8e6 ILT |
5223 | if ((sec->flags & SEC_RELOC) != 0) |
5224 | { | |
5225 | size_t ext_size; | |
6ec3bb6a | 5226 | |
6c8fa8e6 ILT |
5227 | ext_size = elf_section_data (sec)->rel_hdr.sh_size; |
5228 | if (ext_size > max_external_reloc_size) | |
5229 | max_external_reloc_size = ext_size; | |
5230 | if (sec->reloc_count > max_internal_reloc_count) | |
5231 | max_internal_reloc_count = sec->reloc_count; | |
5232 | } | |
6ec3bb6a ILT |
5233 | } |
5234 | } | |
5235 | } | |
5236 | ||
5237 | if (o->reloc_count > 0) | |
5238 | o->flags |= SEC_RELOC; | |
5239 | else | |
5240 | { | |
5241 | /* Explicitly clear the SEC_RELOC flag. The linker tends to | |
5242 | set it (this is probably a bug) and if it is set | |
5243 | assign_section_numbers will create a reloc section. */ | |
5244 | o->flags &=~ SEC_RELOC; | |
5245 | } | |
1c640609 ILT |
5246 | |
5247 | /* If the SEC_ALLOC flag is not set, force the section VMA to | |
5248 | zero. This is done in elf_fake_sections as well, but forcing | |
5249 | the VMA to 0 here will ensure that relocs against these | |
5250 | sections are handled correctly. */ | |
5251 | if ((o->flags & SEC_ALLOC) == 0) | |
5252 | o->vma = 0; | |
6ec3bb6a ILT |
5253 | } |
5254 | ||
5255 | /* Figure out the file positions for everything but the symbol table | |
5256 | and the relocs. We set symcount to force assign_section_numbers | |
5257 | to create a symbol table. */ | |
5258 | abfd->symcount = info->strip == strip_all ? 0 : 1; | |
5259 | BFD_ASSERT (! abfd->output_has_begun); | |
5260 | if (! elf_compute_section_file_positions (abfd, info)) | |
5261 | goto error_return; | |
5262 | ||
5263 | /* That created the reloc sections. Set their sizes, and assign | |
5264 | them file positions, and allocate some buffers. */ | |
5265 | for (o = abfd->sections; o != NULL; o = o->next) | |
5266 | { | |
5267 | if ((o->flags & SEC_RELOC) != 0) | |
5268 | { | |
5269 | Elf_Internal_Shdr *rel_hdr; | |
5270 | register struct elf_link_hash_entry **p, **pend; | |
5271 | ||
5272 | rel_hdr = &elf_section_data (o)->rel_hdr; | |
5273 | ||
5274 | rel_hdr->sh_size = rel_hdr->sh_entsize * o->reloc_count; | |
5275 | ||
5276 | /* The contents field must last into write_object_contents, | |
5277 | so we allocate it with bfd_alloc rather than malloc. */ | |
5278 | rel_hdr->contents = (PTR) bfd_alloc (abfd, rel_hdr->sh_size); | |
5279 | if (rel_hdr->contents == NULL && rel_hdr->sh_size != 0) | |
5280 | { | |
5281 | bfd_set_error (bfd_error_no_memory); | |
5282 | goto error_return; | |
5283 | } | |
5284 | ||
5285 | p = ((struct elf_link_hash_entry **) | |
5286 | malloc (o->reloc_count | |
5287 | * sizeof (struct elf_link_hash_entry *))); | |
5288 | if (p == NULL && o->reloc_count != 0) | |
5289 | { | |
5290 | bfd_set_error (bfd_error_no_memory); | |
5291 | goto error_return; | |
5292 | } | |
5293 | elf_section_data (o)->rel_hashes = p; | |
5294 | pend = p + o->reloc_count; | |
5295 | for (; p < pend; p++) | |
5296 | *p = NULL; | |
5297 | ||
5298 | /* Use the reloc_count field as an index when outputting the | |
5299 | relocs. */ | |
5300 | o->reloc_count = 0; | |
5301 | } | |
5302 | } | |
5303 | ||
5304 | assign_file_positions_for_relocs (abfd); | |
5305 | ||
5306 | /* We have now assigned file positions for all the sections except | |
5307 | .symtab and .strtab. We start the .symtab section at the current | |
5308 | file position, and write directly to it. We build the .strtab | |
5309 | section in memory. When we add .dynsym support, we will build | |
5310 | that in memory as well (.dynsym is smaller than .symtab). */ | |
5311 | abfd->symcount = 0; | |
5312 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
5313 | /* sh_name is set in prep_headers. */ | |
5314 | symtab_hdr->sh_type = SHT_SYMTAB; | |
5315 | symtab_hdr->sh_flags = 0; | |
5316 | symtab_hdr->sh_addr = 0; | |
5317 | symtab_hdr->sh_size = 0; | |
5318 | symtab_hdr->sh_entsize = sizeof (Elf_External_Sym); | |
5319 | /* sh_link is set in assign_section_numbers. */ | |
5320 | /* sh_info is set below. */ | |
5321 | /* sh_offset is set just below. */ | |
5322 | symtab_hdr->sh_addralign = 4; /* FIXME: system dependent? */ | |
5323 | ||
5324 | off = elf_tdata (abfd)->next_file_pos; | |
013dec1a | 5325 | off = assign_file_position_for_section (symtab_hdr, off, true); |
6ec3bb6a ILT |
5326 | |
5327 | /* Note that at this point elf_tdata (abfd)->next_file_pos is | |
5328 | incorrect. We do not yet know the size of the .symtab section. | |
5329 | We correct next_file_pos below, after we do know the size. */ | |
5330 | ||
5331 | /* Allocate a buffer to hold swapped out symbols. This is to avoid | |
5332 | continuously seeking to the right position in the file. */ | |
5333 | if (! info->keep_memory || max_sym_count < 20) | |
5334 | finfo.symbuf_size = 20; | |
5335 | else | |
5336 | finfo.symbuf_size = max_sym_count; | |
5337 | finfo.symbuf = ((Elf_External_Sym *) | |
5338 | malloc (finfo.symbuf_size * sizeof (Elf_External_Sym))); | |
5339 | if (finfo.symbuf == NULL) | |
5340 | { | |
5341 | bfd_set_error (bfd_error_no_memory); | |
5342 | goto error_return; | |
5343 | } | |
5344 | ||
5345 | /* Start writing out the symbol table. The first symbol is always a | |
5346 | dummy symbol. */ | |
5347 | elfsym.st_value = 0; | |
5348 | elfsym.st_size = 0; | |
5349 | elfsym.st_info = 0; | |
5350 | elfsym.st_other = 0; | |
5351 | elfsym.st_shndx = SHN_UNDEF; | |
71edd06d ILT |
5352 | if (! elf_link_output_sym (&finfo, (const char *) NULL, |
5353 | &elfsym, bfd_und_section_ptr)) | |
6ec3bb6a ILT |
5354 | goto error_return; |
5355 | ||
5356 | #if 0 | |
5357 | /* Some standard ELF linkers do this, but we don't because it causes | |
5358 | bootstrap comparison failures. */ | |
5359 | /* Output a file symbol for the output file as the second symbol. | |
5360 | We output this even if we are discarding local symbols, although | |
5361 | I'm not sure if this is correct. */ | |
5362 | elfsym.st_value = 0; | |
5363 | elfsym.st_size = 0; | |
5364 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
5365 | elfsym.st_other = 0; | |
5366 | elfsym.st_shndx = SHN_ABS; | |
71edd06d ILT |
5367 | if (! elf_link_output_sym (&finfo, bfd_get_filename (abfd), |
5368 | &elfsym, bfd_abs_section_ptr)) | |
6ec3bb6a ILT |
5369 | goto error_return; |
5370 | #endif | |
5371 | ||
5372 | /* Output a symbol for each section. We output these even if we are | |
5373 | discarding local symbols, since they are used for relocs. These | |
5374 | symbols have no names. We store the index of each one in the | |
5375 | index field of the section, so that we can find it again when | |
5376 | outputting relocs. */ | |
5377 | elfsym.st_value = 0; | |
5378 | elfsym.st_size = 0; | |
5379 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
5380 | elfsym.st_other = 0; | |
013dec1a | 5381 | for (i = 1; i < elf_elfheader (abfd)->e_shnum; i++) |
6ec3bb6a | 5382 | { |
013dec1a | 5383 | o = section_from_elf_index (abfd, i); |
badd23e3 | 5384 | if (! bfd_is_abs_section (o)) |
013dec1a ILT |
5385 | o->target_index = abfd->symcount; |
5386 | elfsym.st_shndx = i; | |
71edd06d ILT |
5387 | if (! elf_link_output_sym (&finfo, (const char *) NULL, |
5388 | &elfsym, o)) | |
6ec3bb6a ILT |
5389 | goto error_return; |
5390 | } | |
5391 | ||
5392 | /* Allocate some memory to hold information read in from the input | |
5393 | files. */ | |
5394 | finfo.contents = (bfd_byte *) malloc (max_contents_size); | |
5395 | finfo.external_relocs = (PTR) malloc (max_external_reloc_size); | |
5396 | finfo.internal_relocs = ((Elf_Internal_Rela *) | |
5397 | malloc (max_internal_reloc_count | |
5398 | * sizeof (Elf_Internal_Rela))); | |
5399 | finfo.external_syms = ((Elf_External_Sym *) | |
5400 | malloc (max_sym_count * sizeof (Elf_External_Sym))); | |
5401 | finfo.internal_syms = ((Elf_Internal_Sym *) | |
5402 | malloc (max_sym_count * sizeof (Elf_Internal_Sym))); | |
5403 | finfo.indices = (long *) malloc (max_sym_count * sizeof (long)); | |
5404 | finfo.sections = (asection **) malloc (max_sym_count * sizeof (asection *)); | |
5405 | if ((finfo.contents == NULL && max_contents_size != 0) | |
5406 | || (finfo.external_relocs == NULL && max_external_reloc_size != 0) | |
5407 | || (finfo.internal_relocs == NULL && max_internal_reloc_count != 0) | |
5408 | || (finfo.external_syms == NULL && max_sym_count != 0) | |
5409 | || (finfo.internal_syms == NULL && max_sym_count != 0) | |
5410 | || (finfo.indices == NULL && max_sym_count != 0) | |
5411 | || (finfo.sections == NULL && max_sym_count != 0)) | |
5412 | { | |
5413 | bfd_set_error (bfd_error_no_memory); | |
5414 | goto error_return; | |
5415 | } | |
5416 | ||
5417 | /* Since ELF permits relocations to be against local symbols, we | |
5418 | must have the local symbols available when we do the relocations. | |
5419 | Since we would rather only read the local symbols once, and we | |
5420 | would rather not keep them in memory, we handle all the | |
5421 | relocations for a single input file at the same time. | |
5422 | ||
5423 | Unfortunately, there is no way to know the total number of local | |
5424 | symbols until we have seen all of them, and the local symbol | |
5425 | indices precede the global symbol indices. This means that when | |
5426 | we are generating relocateable output, and we see a reloc against | |
5427 | a global symbol, we can not know the symbol index until we have | |
5428 | finished examining all the local symbols to see which ones we are | |
5429 | going to output. To deal with this, we keep the relocations in | |
5430 | memory, and don't output them until the end of the link. This is | |
5431 | an unfortunate waste of memory, but I don't see a good way around | |
5432 | it. Fortunately, it only happens when performing a relocateable | |
5433 | link, which is not the common case. FIXME: If keep_memory is set | |
5434 | we could write the relocs out and then read them again; I don't | |
5435 | know how bad the memory loss will be. */ | |
5436 | ||
5437 | for (sub = info->input_bfds; sub != NULL; sub = sub->next) | |
5438 | sub->output_has_begun = false; | |
5439 | for (o = abfd->sections; o != NULL; o = o->next) | |
5440 | { | |
5441 | for (p = o->link_order_head; p != NULL; p = p->next) | |
5442 | { | |
5443 | if (p->type == bfd_indirect_link_order | |
5444 | && (bfd_get_flavour (p->u.indirect.section->owner) | |
5445 | == bfd_target_elf_flavour)) | |
5446 | { | |
5447 | sub = p->u.indirect.section->owner; | |
5448 | if (! sub->output_has_begun) | |
5449 | { | |
5450 | if (! elf_link_input_bfd (&finfo, sub)) | |
5451 | goto error_return; | |
5452 | sub->output_has_begun = true; | |
5453 | } | |
5454 | } | |
5455 | else if (p->type == bfd_section_reloc_link_order | |
5456 | || p->type == bfd_symbol_reloc_link_order) | |
5457 | { | |
5458 | if (! elf_reloc_link_order (abfd, info, o, p)) | |
5459 | goto error_return; | |
5460 | } | |
5461 | else | |
5462 | { | |
5463 | if (! _bfd_default_link_order (abfd, info, o, p)) | |
5464 | goto error_return; | |
5465 | } | |
5466 | } | |
5467 | } | |
5468 | ||
5469 | /* That wrote out all the local symbols. Finish up the symbol table | |
5470 | with the global symbols. */ | |
5471 | ||
5472 | /* The sh_info field records the index of the first non local | |
5473 | symbol. */ | |
5474 | symtab_hdr->sh_info = abfd->symcount; | |
013dec1a ILT |
5475 | if (dynobj != NULL) |
5476 | elf_section_data (finfo.dynsym_sec->output_section)->this_hdr.sh_info = 1; | |
6ec3bb6a ILT |
5477 | |
5478 | /* We get the global symbols from the hash table. */ | |
013dec1a ILT |
5479 | elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym, |
5480 | (PTR) &finfo); | |
6ec3bb6a ILT |
5481 | |
5482 | /* Flush all symbols to the file. */ | |
5483 | if (! elf_link_flush_output_syms (&finfo)) | |
5484 | return false; | |
5485 | ||
5486 | /* Now we know the size of the symtab section. */ | |
5487 | off += symtab_hdr->sh_size; | |
5488 | ||
5489 | /* Finish up the symbol string table (.strtab) section. */ | |
5490 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; | |
5491 | /* sh_name was set in prep_headers. */ | |
5492 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
5493 | symstrtab_hdr->sh_flags = 0; | |
5494 | symstrtab_hdr->sh_addr = 0; | |
5495 | symstrtab_hdr->sh_size = finfo.symstrtab->length; | |
5496 | symstrtab_hdr->sh_entsize = 0; | |
5497 | symstrtab_hdr->sh_link = 0; | |
5498 | symstrtab_hdr->sh_info = 0; | |
5499 | /* sh_offset is set just below. */ | |
5500 | symstrtab_hdr->sh_addralign = 1; | |
5501 | symstrtab_hdr->contents = (PTR) finfo.symstrtab->tab; | |
5502 | ||
013dec1a | 5503 | off = assign_file_position_for_section (symstrtab_hdr, off, true); |
6ec3bb6a ILT |
5504 | elf_tdata (abfd)->next_file_pos = off; |
5505 | ||
5506 | /* Adjust the relocs to have the correct symbol indices. */ | |
5507 | for (o = abfd->sections; o != NULL; o = o->next) | |
5508 | { | |
5509 | struct elf_link_hash_entry **rel_hash; | |
5510 | Elf_Internal_Shdr *rel_hdr; | |
6ec3bb6a ILT |
5511 | |
5512 | if ((o->flags & SEC_RELOC) == 0) | |
5513 | continue; | |
5514 | ||
5515 | rel_hash = elf_section_data (o)->rel_hashes; | |
5516 | rel_hdr = &elf_section_data (o)->rel_hdr; | |
5517 | for (i = 0; i < o->reloc_count; i++, rel_hash++) | |
5518 | { | |
5519 | if (*rel_hash == NULL) | |
5520 | continue; | |
5521 | ||
5522 | BFD_ASSERT ((*rel_hash)->indx >= 0); | |
5523 | ||
5524 | if (rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) | |
5525 | { | |
5526 | Elf_External_Rel *erel; | |
5527 | Elf_Internal_Rel irel; | |
5528 | ||
5529 | erel = (Elf_External_Rel *) rel_hdr->contents + i; | |
5530 | elf_swap_reloc_in (abfd, erel, &irel); | |
5531 | irel.r_info = ELF_R_INFO ((*rel_hash)->indx, | |
5532 | ELF_R_TYPE (irel.r_info)); | |
5533 | elf_swap_reloc_out (abfd, &irel, erel); | |
5534 | } | |
5535 | else | |
5536 | { | |
5537 | Elf_External_Rela *erela; | |
5538 | Elf_Internal_Rela irela; | |
5539 | ||
5540 | BFD_ASSERT (rel_hdr->sh_entsize | |
5541 | == sizeof (Elf_External_Rela)); | |
5542 | ||
5543 | erela = (Elf_External_Rela *) rel_hdr->contents + i; | |
5544 | elf_swap_reloca_in (abfd, erela, &irela); | |
5545 | irela.r_info = ELF_R_INFO ((*rel_hash)->indx, | |
5546 | ELF_R_TYPE (irela.r_info)); | |
5547 | elf_swap_reloca_out (abfd, &irela, erela); | |
5548 | } | |
5549 | } | |
5550 | ||
5551 | /* Set the reloc_count field to 0 to prevent write_relocs from | |
5552 | trying to swap the relocs out itself. */ | |
5553 | o->reloc_count = 0; | |
5554 | } | |
5555 | ||
013dec1a ILT |
5556 | /* If we are linking against a dynamic object, finish up the dynamic |
5557 | linking information. */ | |
5558 | if (dynobj != NULL) | |
5559 | { | |
5560 | Elf_External_Dyn *dyncon, *dynconend; | |
013dec1a ILT |
5561 | |
5562 | /* Fix up .dynamic entries. */ | |
5563 | o = bfd_get_section_by_name (dynobj, ".dynamic"); | |
5564 | BFD_ASSERT (o != NULL); | |
5565 | ||
5566 | dyncon = (Elf_External_Dyn *) o->contents; | |
5567 | dynconend = (Elf_External_Dyn *) (o->contents + o->_raw_size); | |
5568 | for (; dyncon < dynconend; dyncon++) | |
5569 | { | |
5570 | Elf_Internal_Dyn dyn; | |
5571 | const char *name; | |
5572 | unsigned int type; | |
5573 | ||
5574 | elf_swap_dyn_in (dynobj, dyncon, &dyn); | |
5575 | ||
5576 | switch (dyn.d_tag) | |
5577 | { | |
5578 | default: | |
5579 | break; | |
5580 | ||
5581 | case DT_INIT: | |
5582 | name = ".init"; | |
5583 | goto get_vma; | |
5584 | case DT_FINI: | |
5585 | name = ".fini"; | |
5586 | goto get_vma; | |
5587 | case DT_HASH: | |
5588 | name = ".hash"; | |
5589 | goto get_vma; | |
5590 | case DT_STRTAB: | |
5591 | name = ".dynstr"; | |
5592 | goto get_vma; | |
5593 | case DT_SYMTAB: | |
5594 | name = ".dynsym"; | |
5595 | get_vma: | |
5596 | o = bfd_get_section_by_name (abfd, name); | |
5597 | BFD_ASSERT (o != NULL); | |
5598 | dyn.d_un.d_ptr = o->vma; | |
5599 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
5600 | break; | |
5601 | ||
5602 | case DT_REL: | |
5603 | case DT_RELA: | |
5604 | case DT_RELSZ: | |
5605 | case DT_RELASZ: | |
5606 | if (dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ) | |
5607 | type = SHT_REL; | |
5608 | else | |
5609 | type = SHT_RELA; | |
5610 | dyn.d_un.d_val = 0; | |
5611 | for (i = 1; i < elf_elfheader (abfd)->e_shnum; i++) | |
5612 | { | |
5613 | Elf_Internal_Shdr *hdr; | |
5614 | ||
5615 | hdr = elf_elfsections (abfd)[i]; | |
5616 | if (hdr->sh_type == type | |
5617 | && (hdr->sh_flags & SHF_ALLOC) != 0) | |
5618 | { | |
5619 | if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ) | |
5620 | dyn.d_un.d_val += hdr->sh_size; | |
5621 | else | |
5622 | { | |
5623 | if (dyn.d_un.d_val == 0 | |
5624 | || hdr->sh_addr < dyn.d_un.d_val) | |
5625 | dyn.d_un.d_val = hdr->sh_addr; | |
5626 | } | |
5627 | } | |
5628 | } | |
5629 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
5630 | break; | |
5631 | } | |
5632 | } | |
5633 | ||
013dec1a ILT |
5634 | if (! (*bed->elf_backend_finish_dynamic_sections) (abfd, info)) |
5635 | goto error_return; | |
5636 | ||
5637 | for (o = dynobj->sections; o != NULL; o = o->next) | |
5638 | { | |
013dec1a ILT |
5639 | if ((o->flags & SEC_HAS_CONTENTS) == 0) |
5640 | continue; | |
8af74670 ILT |
5641 | if ((o->flags & SEC_IN_MEMORY) == 0) |
5642 | { | |
fb562be0 ILT |
5643 | /* At this point, we are only interested in sections |
5644 | created by elf_link_create_dynamic_sections. FIXME: | |
5645 | This test is fragile. */ | |
8af74670 ILT |
5646 | continue; |
5647 | } | |
013dec1a ILT |
5648 | if (! bfd_set_section_contents (abfd, o->output_section, |
5649 | o->contents, o->output_offset, | |
5650 | o->_raw_size)) | |
5651 | goto error_return; | |
013dec1a ILT |
5652 | } |
5653 | } | |
5654 | ||
6ec3bb6a ILT |
5655 | if (finfo.contents != NULL) |
5656 | free (finfo.contents); | |
5657 | if (finfo.external_relocs != NULL) | |
5658 | free (finfo.external_relocs); | |
5659 | if (finfo.internal_relocs != NULL) | |
5660 | free (finfo.internal_relocs); | |
5661 | if (finfo.external_syms != NULL) | |
5662 | free (finfo.external_syms); | |
5663 | if (finfo.internal_syms != NULL) | |
5664 | free (finfo.internal_syms); | |
5665 | if (finfo.indices != NULL) | |
5666 | free (finfo.indices); | |
5667 | if (finfo.sections != NULL) | |
5668 | free (finfo.sections); | |
5669 | if (finfo.symbuf != NULL) | |
5670 | free (finfo.symbuf); | |
5671 | for (o = abfd->sections; o != NULL; o = o->next) | |
5672 | { | |
5673 | if ((o->flags & SEC_RELOC) != 0 | |
5674 | && elf_section_data (o)->rel_hashes != NULL) | |
5675 | free (elf_section_data (o)->rel_hashes); | |
5676 | } | |
5677 | ||
3c9832f8 ILT |
5678 | elf_tdata (abfd)->linker = true; |
5679 | ||
6ec3bb6a ILT |
5680 | return true; |
5681 | ||
5682 | error_return: | |
5683 | if (finfo.contents != NULL) | |
5684 | free (finfo.contents); | |
5685 | if (finfo.external_relocs != NULL) | |
5686 | free (finfo.external_relocs); | |
5687 | if (finfo.internal_relocs != NULL) | |
5688 | free (finfo.internal_relocs); | |
5689 | if (finfo.external_syms != NULL) | |
5690 | free (finfo.external_syms); | |
5691 | if (finfo.internal_syms != NULL) | |
5692 | free (finfo.internal_syms); | |
5693 | if (finfo.indices != NULL) | |
5694 | free (finfo.indices); | |
5695 | if (finfo.sections != NULL) | |
5696 | free (finfo.sections); | |
5697 | if (finfo.symbuf != NULL) | |
5698 | free (finfo.symbuf); | |
5699 | for (o = abfd->sections; o != NULL; o = o->next) | |
5700 | { | |
5701 | if ((o->flags & SEC_RELOC) != 0 | |
5702 | && elf_section_data (o)->rel_hashes != NULL) | |
5703 | free (elf_section_data (o)->rel_hashes); | |
5704 | } | |
5705 | ||
5706 | return false; | |
5707 | } | |
5708 | ||
5709 | /* Add a symbol to the output symbol table. */ | |
5710 | ||
5711 | static boolean | |
71edd06d | 5712 | elf_link_output_sym (finfo, name, elfsym, input_sec) |
6ec3bb6a ILT |
5713 | struct elf_final_link_info *finfo; |
5714 | const char *name; | |
5715 | Elf_Internal_Sym *elfsym; | |
71edd06d | 5716 | asection *input_sec; |
6ec3bb6a | 5717 | { |
71edd06d ILT |
5718 | boolean (*output_symbol_hook) PARAMS ((bfd *, |
5719 | struct bfd_link_info *info, | |
5720 | const char *, | |
5721 | Elf_Internal_Sym *, | |
5722 | asection *)); | |
5723 | ||
5724 | output_symbol_hook = get_elf_backend_data (finfo->output_bfd)-> | |
5725 | elf_backend_link_output_symbol_hook; | |
57a814a9 PS |
5726 | if (output_symbol_hook != NULL) |
5727 | { | |
5728 | if (! ((*output_symbol_hook) | |
5729 | (finfo->output_bfd, finfo->info, name, elfsym, input_sec))) | |
5730 | return false; | |
5731 | } | |
71edd06d | 5732 | |
6ec3bb6a ILT |
5733 | if (name == (const char *) NULL || *name == '\0') |
5734 | elfsym->st_name = 0; | |
5735 | else | |
5736 | { | |
5737 | elfsym->st_name = bfd_add_to_strtab (finfo->output_bfd, | |
5738 | finfo->symstrtab, name); | |
5739 | if (elfsym->st_name == (unsigned long) -1) | |
5740 | return false; | |
5741 | } | |
5742 | ||
5743 | if (finfo->symbuf_count >= finfo->symbuf_size) | |
5744 | { | |
5745 | if (! elf_link_flush_output_syms (finfo)) | |
5746 | return false; | |
5747 | } | |
5748 | ||
5749 | elf_swap_symbol_out (finfo->output_bfd, elfsym, | |
5750 | finfo->symbuf + finfo->symbuf_count); | |
5751 | ++finfo->symbuf_count; | |
5752 | ||
5753 | ++finfo->output_bfd->symcount; | |
5754 | ||
5755 | return true; | |
5756 | } | |
5757 | ||
5758 | /* Flush the output symbols to the file. */ | |
5759 | ||
5760 | static boolean | |
5761 | elf_link_flush_output_syms (finfo) | |
5762 | struct elf_final_link_info *finfo; | |
5763 | { | |
5764 | Elf_Internal_Shdr *symtab; | |
5765 | ||
5766 | symtab = &elf_tdata (finfo->output_bfd)->symtab_hdr; | |
5767 | ||
5768 | if (bfd_seek (finfo->output_bfd, symtab->sh_offset + symtab->sh_size, | |
5769 | SEEK_SET) != 0 | |
5770 | || (bfd_write ((PTR) finfo->symbuf, finfo->symbuf_count, | |
5771 | sizeof (Elf_External_Sym), finfo->output_bfd) | |
5772 | != finfo->symbuf_count * sizeof (Elf_External_Sym))) | |
5773 | return false; | |
5774 | ||
5775 | symtab->sh_size += finfo->symbuf_count * sizeof (Elf_External_Sym); | |
5776 | ||
5777 | finfo->symbuf_count = 0; | |
5778 | ||
5779 | return true; | |
5780 | } | |
5781 | ||
5782 | /* Add an external symbol to the symbol table. This is called from | |
5783 | the hash table traversal routine. */ | |
5784 | ||
5785 | static boolean | |
5786 | elf_link_output_extsym (h, data) | |
5787 | struct elf_link_hash_entry *h; | |
5788 | PTR data; | |
5789 | { | |
5790 | struct elf_final_link_info *finfo = (struct elf_final_link_info *) data; | |
013dec1a | 5791 | boolean strip; |
6ec3bb6a | 5792 | Elf_Internal_Sym sym; |
71edd06d | 5793 | asection *input_sec; |
6ec3bb6a | 5794 | |
013dec1a ILT |
5795 | /* We don't want to output symbols that have never been mentioned by |
5796 | a regular file, or that we have been told to strip. However, if | |
5797 | h->indx is set to -2, the symbol is used by a reloc and we must | |
5798 | output it. */ | |
5799 | if (h->indx == -2) | |
5800 | strip = false; | |
5315c428 ILT |
5801 | else if (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
5802 | || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0) | |
5803 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 | |
013dec1a ILT |
5804 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) |
5805 | strip = true; | |
5806 | else if (finfo->info->strip == strip_all | |
5807 | || (finfo->info->strip == strip_some | |
5808 | && bfd_hash_lookup (finfo->info->keep_hash, | |
5809 | h->root.root.string, | |
5810 | false, false) == NULL)) | |
5811 | strip = true; | |
5812 | else | |
5813 | strip = false; | |
5814 | ||
5815 | /* If we're stripping it, and it's not a dynamic symbol, there's | |
5816 | nothing else to do. */ | |
5817 | if (strip && h->dynindx == -1) | |
6ec3bb6a ILT |
5818 | return true; |
5819 | ||
5820 | sym.st_value = 0; | |
5821 | sym.st_size = h->size; | |
6ec3bb6a | 5822 | sym.st_other = 0; |
bf73e4f3 | 5823 | if (h->root.type == bfd_link_hash_weak |
57b40081 | 5824 | || (h->elf_link_hash_flags & ELF_LINK_HASH_DEFINED_WEAK) != 0) |
bf73e4f3 ILT |
5825 | sym.st_info = ELF_ST_INFO (STB_WEAK, h->type); |
5826 | else | |
5827 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, h->type); | |
6ec3bb6a ILT |
5828 | |
5829 | switch (h->root.type) | |
5830 | { | |
5831 | default: | |
5832 | case bfd_link_hash_new: | |
5833 | abort (); | |
5834 | return false; | |
5835 | ||
5836 | case bfd_link_hash_undefined: | |
71edd06d | 5837 | input_sec = bfd_und_section_ptr; |
6ec3bb6a ILT |
5838 | sym.st_shndx = SHN_UNDEF; |
5839 | break; | |
5840 | ||
5841 | case bfd_link_hash_weak: | |
71edd06d | 5842 | input_sec = bfd_und_section_ptr; |
6ec3bb6a | 5843 | sym.st_shndx = SHN_UNDEF; |
6ec3bb6a ILT |
5844 | break; |
5845 | ||
5846 | case bfd_link_hash_defined: | |
5847 | { | |
6ec3bb6a | 5848 | |
71edd06d ILT |
5849 | input_sec = h->root.u.def.section; |
5850 | if (input_sec->output_section != NULL) | |
6ec3bb6a | 5851 | { |
013dec1a | 5852 | sym.st_shndx = elf_section_from_bfd_section (finfo->output_bfd, |
71edd06d | 5853 | input_sec->output_section); |
013dec1a ILT |
5854 | if (sym.st_shndx == (unsigned short) -1) |
5855 | { | |
5856 | /* FIXME: No way to handle errors. */ | |
5857 | abort (); | |
5858 | } | |
6ec3bb6a | 5859 | |
013dec1a ILT |
5860 | /* ELF symbols in relocateable files are section relative, |
5861 | but in nonrelocateable files they are virtual | |
5862 | addresses. */ | |
71edd06d | 5863 | sym.st_value = h->root.u.def.value + input_sec->output_offset; |
013dec1a | 5864 | if (! finfo->info->relocateable) |
71edd06d | 5865 | sym.st_value += input_sec->output_section->vma; |
013dec1a ILT |
5866 | } |
5867 | else | |
5868 | { | |
71edd06d ILT |
5869 | BFD_ASSERT (bfd_get_flavour (input_sec->owner) |
5870 | == bfd_target_elf_flavour | |
5871 | && elf_elfheader (input_sec->owner)->e_type == ET_DYN); | |
013dec1a | 5872 | sym.st_shndx = SHN_UNDEF; |
71edd06d | 5873 | input_sec = bfd_und_section_ptr; |
013dec1a | 5874 | } |
6ec3bb6a ILT |
5875 | } |
5876 | break; | |
5877 | ||
5878 | case bfd_link_hash_common: | |
71edd06d | 5879 | input_sec = bfd_com_section_ptr; |
6ec3bb6a | 5880 | sym.st_shndx = SHN_COMMON; |
7c6da9ca | 5881 | sym.st_value = 1 << h->root.u.c.alignment_power; |
6ec3bb6a ILT |
5882 | break; |
5883 | ||
5884 | case bfd_link_hash_indirect: | |
5885 | case bfd_link_hash_warning: | |
5886 | /* I have no idea how these should be handled. */ | |
5887 | return true; | |
5888 | } | |
5889 | ||
013dec1a ILT |
5890 | /* If this symbol should be put in the .dynsym section, then put it |
5891 | there now. We have already know the symbol index. We also fill | |
5892 | in the entry in the .hash section. */ | |
5893 | if (h->dynindx != -1) | |
5894 | { | |
5895 | struct elf_backend_data *bed; | |
5896 | size_t bucketcount; | |
5897 | size_t bucket; | |
5898 | bfd_byte *bucketpos; | |
5899 | bfd_vma chain; | |
5900 | ||
5901 | sym.st_name = h->dynstr_index; | |
5902 | ||
5903 | /* Give the processor backend a chance to tweak the symbol | |
5904 | value, and also to finish up anything that needs to be done | |
5905 | for this symbol. */ | |
5906 | bed = get_elf_backend_data (finfo->output_bfd); | |
5907 | if (! ((*bed->elf_backend_finish_dynamic_symbol) | |
5908 | (finfo->output_bfd, finfo->info, h, &sym))) | |
5909 | { | |
5910 | /* FIXME: No way to return error. */ | |
5911 | abort (); | |
5912 | } | |
5913 | ||
5914 | elf_swap_symbol_out (finfo->output_bfd, &sym, | |
5915 | ((Elf_External_Sym *) finfo->dynsym_sec->contents | |
5916 | + h->dynindx)); | |
5917 | ||
5918 | bucketcount = elf_hash_table (finfo->info)->bucketcount; | |
5919 | bucket = bfd_elf_hash (h->root.root.string) % bucketcount; | |
5920 | bucketpos = ((bfd_byte *) finfo->hash_sec->contents | |
5921 | + (bucket + 2) * (ARCH_SIZE / 8)); | |
5922 | chain = get_word (finfo->output_bfd, bucketpos); | |
5923 | put_word (finfo->output_bfd, h->dynindx, bucketpos); | |
5924 | put_word (finfo->output_bfd, chain, | |
5925 | ((bfd_byte *) finfo->hash_sec->contents | |
5926 | + (bucketcount + 2 + h->dynindx) * (ARCH_SIZE / 8))); | |
5927 | } | |
5928 | ||
5929 | /* If we're stripping it, then it was just a dynamic symbol, and | |
5930 | there's nothing else to do. */ | |
5931 | if (strip) | |
5932 | return true; | |
5933 | ||
6ec3bb6a ILT |
5934 | h->indx = finfo->output_bfd->symcount; |
5935 | ||
71edd06d | 5936 | if (! elf_link_output_sym (finfo, h->root.root.string, &sym, input_sec)) |
6ec3bb6a ILT |
5937 | { |
5938 | /* FIXME: No way to return error. */ | |
5939 | abort (); | |
5940 | } | |
5941 | ||
5942 | return true; | |
5943 | } | |
5944 | ||
5945 | /* Link an input file into the linker output file. This function | |
5946 | handles all the sections and relocations of the input file at once. | |
5947 | This is so that we only have to read the local symbols once, and | |
5948 | don't have to keep them in memory. */ | |
5949 | ||
5950 | static boolean | |
5951 | elf_link_input_bfd (finfo, input_bfd) | |
5952 | struct elf_final_link_info *finfo; | |
5953 | bfd *input_bfd; | |
5954 | { | |
5955 | boolean (*relocate_section) PARAMS ((bfd *, struct bfd_link_info *, | |
5956 | bfd *, asection *, bfd_byte *, | |
5957 | Elf_Internal_Rela *, | |
5958 | Elf_Internal_Sym *, | |
71edd06d | 5959 | asection **, char *)); |
6ec3bb6a ILT |
5960 | bfd *output_bfd; |
5961 | Elf_Internal_Shdr *symtab_hdr; | |
5315c428 ILT |
5962 | size_t locsymcount; |
5963 | size_t extsymoff; | |
6ec3bb6a ILT |
5964 | Elf_External_Sym *esym; |
5965 | Elf_External_Sym *esymend; | |
5966 | Elf_Internal_Sym *isym; | |
5967 | long *pindex; | |
5968 | asection **ppsection; | |
5969 | asection *o; | |
5970 | ||
5971 | output_bfd = finfo->output_bfd; | |
5972 | relocate_section = | |
5973 | get_elf_backend_data (output_bfd)->elf_backend_relocate_section; | |
5974 | ||
013dec1a ILT |
5975 | /* If this is a dynamic object, we don't want to do anything here: |
5976 | we don't want the local symbols, and we don't want the section | |
5977 | contents. */ | |
5978 | if (elf_elfheader (input_bfd)->e_type == ET_DYN) | |
5979 | return true; | |
5980 | ||
6ec3bb6a | 5981 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
5315c428 ILT |
5982 | if (elf_bad_symtab (input_bfd)) |
5983 | { | |
5984 | locsymcount = symtab_hdr->sh_size / sizeof (Elf_External_Sym); | |
5985 | extsymoff = 0; | |
5986 | } | |
5987 | else | |
5988 | { | |
5989 | locsymcount = symtab_hdr->sh_info; | |
5990 | extsymoff = symtab_hdr->sh_info; | |
5991 | } | |
5992 | ||
5993 | /* Read the local symbols. */ | |
c46b8ed7 JL |
5994 | if (locsymcount > 0 |
5995 | && (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0 | |
5996 | || (bfd_read (finfo->external_syms, sizeof (Elf_External_Sym), | |
5997 | locsymcount, input_bfd) | |
5998 | != locsymcount * sizeof (Elf_External_Sym)))) | |
6ec3bb6a ILT |
5999 | return false; |
6000 | ||
6001 | /* Swap in the local symbols and write out the ones which we know | |
6002 | are going into the output file. */ | |
6003 | esym = finfo->external_syms; | |
5315c428 | 6004 | esymend = esym + locsymcount; |
6ec3bb6a ILT |
6005 | isym = finfo->internal_syms; |
6006 | pindex = finfo->indices; | |
6007 | ppsection = finfo->sections; | |
6008 | for (; esym < esymend; esym++, isym++, pindex++, ppsection++) | |
6009 | { | |
6010 | asection *isec; | |
6011 | const char *name; | |
6012 | bfd_vma oldval; | |
6013 | ||
6014 | elf_swap_symbol_in (input_bfd, esym, isym); | |
6015 | *pindex = -1; | |
6016 | ||
5315c428 ILT |
6017 | if (elf_bad_symtab (input_bfd)) |
6018 | { | |
6019 | if (ELF_ST_BIND (isym->st_info) != STB_LOCAL) | |
6020 | { | |
6021 | *ppsection = NULL; | |
6022 | continue; | |
6023 | } | |
6024 | } | |
6025 | ||
6ec3bb6a | 6026 | if (isym->st_shndx == SHN_UNDEF) |
badd23e3 | 6027 | isec = bfd_und_section_ptr; |
6ec3bb6a ILT |
6028 | else if (isym->st_shndx > 0 && isym->st_shndx < SHN_LORESERVE) |
6029 | { | |
6030 | isec = section_from_elf_index (input_bfd, isym->st_shndx); | |
6031 | if (isec == NULL) | |
6032 | return false; | |
6033 | } | |
6034 | else if (isym->st_shndx == SHN_ABS) | |
badd23e3 | 6035 | isec = bfd_abs_section_ptr; |
6ec3bb6a | 6036 | else if (isym->st_shndx == SHN_COMMON) |
badd23e3 | 6037 | isec = bfd_com_section_ptr; |
6ec3bb6a ILT |
6038 | else |
6039 | { | |
6040 | /* Who knows? */ | |
6041 | isec = NULL; | |
6042 | } | |
6043 | ||
6044 | *ppsection = isec; | |
6045 | ||
6046 | /* Don't output the first, undefined, symbol. */ | |
6047 | if (esym == finfo->external_syms) | |
6048 | continue; | |
6049 | ||
6050 | /* If we are stripping all symbols, we don't want to output this | |
6051 | one. */ | |
6052 | if (finfo->info->strip == strip_all) | |
6053 | continue; | |
6054 | ||
6055 | /* We never output section symbols. Instead, we use the section | |
6056 | symbol of the corresponding section in the output file. */ | |
6057 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) | |
6058 | continue; | |
6059 | ||
6060 | /* If we are discarding all local symbols, we don't want to | |
6061 | output this one. If we are generating a relocateable output | |
6062 | file, then some of the local symbols may be required by | |
6063 | relocs; we output them below as we discover that they are | |
6064 | needed. */ | |
6065 | if (finfo->info->discard == discard_all) | |
6066 | continue; | |
6067 | ||
6068 | /* Get the name of the symbol. */ | |
6069 | name = elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, | |
6070 | isym->st_name); | |
6071 | if (name == NULL) | |
6072 | return false; | |
6073 | ||
6074 | /* See if we are discarding symbols with this name. */ | |
6075 | if ((finfo->info->strip == strip_some | |
6076 | && (bfd_hash_lookup (finfo->info->keep_hash, name, false, false) | |
6077 | == NULL)) | |
6078 | || (finfo->info->discard == discard_l | |
6079 | && strncmp (name, finfo->info->lprefix, | |
6080 | finfo->info->lprefix_len) == 0)) | |
6081 | continue; | |
6082 | ||
6083 | /* If we get here, we are going to output this symbol. */ | |
6084 | ||
6085 | /* Adjust the section index for the output file. */ | |
6086 | isym->st_shndx = elf_section_from_bfd_section (output_bfd, | |
6087 | isec->output_section); | |
013dec1a | 6088 | if (isym->st_shndx == (unsigned short) -1) |
6ec3bb6a ILT |
6089 | return false; |
6090 | ||
6091 | *pindex = output_bfd->symcount; | |
6092 | ||
6093 | /* ELF symbols in relocateable files are section relative, but | |
6094 | in executable files they are virtual addresses. Note that | |
6095 | this code assumes that all ELF sections have an associated | |
6096 | BFD section with a reasonable value for output_offset; below | |
6097 | we assume that they also have a reasonable value for | |
6098 | output_section. Any special sections must be set up to meet | |
6099 | these requirements. */ | |
6100 | oldval = isym->st_value; | |
6101 | isym->st_value += isec->output_offset; | |
6102 | if (! finfo->info->relocateable) | |
6103 | isym->st_value += isec->output_section->vma; | |
6104 | ||
71edd06d | 6105 | if (! elf_link_output_sym (finfo, name, isym, isec)) |
6ec3bb6a ILT |
6106 | return false; |
6107 | ||
6108 | /* Restore the old value for reloc handling. */ | |
6109 | isym->st_value = oldval; | |
6110 | } | |
6111 | ||
6112 | /* Relocate the contents of each section. */ | |
6113 | for (o = input_bfd->sections; o != NULL; o = o->next) | |
6114 | { | |
6ec3bb6a ILT |
6115 | if ((o->flags & SEC_HAS_CONTENTS) == 0) |
6116 | continue; | |
6117 | ||
8af74670 ILT |
6118 | if ((o->flags & SEC_IN_MEMORY) != 0 |
6119 | && input_bfd == elf_hash_table (finfo->info)->dynobj) | |
6120 | { | |
6121 | /* Section was created by elf_link_create_dynamic_sections. | |
6122 | FIXME: This test is fragile. */ | |
6123 | continue; | |
6124 | } | |
6125 | ||
6ec3bb6a ILT |
6126 | /* Read the contents of the section. */ |
6127 | if (! bfd_get_section_contents (input_bfd, o, finfo->contents, | |
6128 | (file_ptr) 0, o->_raw_size)) | |
6129 | return false; | |
6130 | ||
6131 | if ((o->flags & SEC_RELOC) != 0) | |
6132 | { | |
374d2ef9 ILT |
6133 | Elf_Internal_Rela *internal_relocs; |
6134 | ||
6135 | /* Get the swapped relocs. */ | |
6136 | internal_relocs = elf_link_read_relocs (input_bfd, o, | |
6137 | finfo->external_relocs, | |
6138 | finfo->internal_relocs, | |
6139 | false); | |
6140 | if (internal_relocs == NULL | |
6141 | && o->reloc_count > 0) | |
6142 | return false; | |
6ec3bb6a ILT |
6143 | |
6144 | /* Relocate the section by invoking a back end routine. | |
6145 | ||
6146 | The back end routine is responsible for adjusting the | |
6147 | section contents as necessary, and (if using Rela relocs | |
6148 | and generating a relocateable output file) adjusting the | |
6149 | reloc addend as necessary. | |
6150 | ||
6151 | The back end routine does not have to worry about setting | |
6152 | the reloc address or the reloc symbol index. | |
6153 | ||
6154 | The back end routine is given a pointer to the swapped in | |
6155 | internal symbols, and can access the hash table entries | |
6156 | for the external symbols via elf_sym_hashes (input_bfd). | |
6157 | ||
6158 | When generating relocateable output, the back end routine | |
6159 | must handle STB_LOCAL/STT_SECTION symbols specially. The | |
6160 | output symbol is going to be a section symbol | |
6161 | corresponding to the output section, which will require | |
6162 | the addend to be adjusted. */ | |
6163 | ||
6164 | if (! (*relocate_section) (output_bfd, finfo->info, | |
6165 | input_bfd, o, | |
6166 | finfo->contents, | |
374d2ef9 | 6167 | internal_relocs, |
6ec3bb6a | 6168 | finfo->internal_syms, |
71edd06d ILT |
6169 | finfo->sections, |
6170 | finfo->symstrtab->tab)) | |
6ec3bb6a ILT |
6171 | return false; |
6172 | ||
6173 | if (finfo->info->relocateable) | |
6174 | { | |
6175 | Elf_Internal_Rela *irela; | |
6176 | Elf_Internal_Rela *irelaend; | |
6177 | struct elf_link_hash_entry **rel_hash; | |
374d2ef9 | 6178 | Elf_Internal_Shdr *input_rel_hdr; |
6ec3bb6a ILT |
6179 | Elf_Internal_Shdr *output_rel_hdr; |
6180 | ||
6181 | /* Adjust the reloc addresses and symbol indices. */ | |
6182 | ||
374d2ef9 | 6183 | irela = internal_relocs; |
6ec3bb6a ILT |
6184 | irelaend = irela + o->reloc_count; |
6185 | rel_hash = (elf_section_data (o->output_section)->rel_hashes | |
6186 | + o->output_section->reloc_count); | |
6187 | for (; irela < irelaend; irela++, rel_hash++) | |
6188 | { | |
6189 | long r_symndx; | |
6190 | Elf_Internal_Sym *isym; | |
6191 | asection *sec; | |
6192 | ||
6193 | irela->r_offset += o->output_offset; | |
6194 | ||
6195 | r_symndx = ELF_R_SYM (irela->r_info); | |
6196 | ||
6197 | if (r_symndx == 0) | |
6198 | continue; | |
6199 | ||
5315c428 ILT |
6200 | if (r_symndx >= locsymcount |
6201 | || (elf_bad_symtab (input_bfd) | |
6202 | && finfo->sections[r_symndx] == NULL)) | |
6ec3bb6a ILT |
6203 | { |
6204 | long indx; | |
6205 | ||
6206 | /* This is a reloc against a global symbol. We | |
6207 | have not yet output all the local symbols, so | |
6208 | we do not know the symbol index of any global | |
6209 | symbol. We set the rel_hash entry for this | |
6210 | reloc to point to the global hash table entry | |
6211 | for this symbol. The symbol index is then | |
6212 | set at the end of elf_bfd_final_link. */ | |
5315c428 | 6213 | indx = r_symndx - extsymoff; |
6ec3bb6a ILT |
6214 | *rel_hash = elf_sym_hashes (input_bfd)[indx]; |
6215 | ||
6216 | /* Setting the index to -2 tells | |
6217 | elf_link_output_extsym that this symbol is | |
6218 | used by a reloc. */ | |
6219 | BFD_ASSERT ((*rel_hash)->indx < 0); | |
6220 | (*rel_hash)->indx = -2; | |
6221 | ||
6222 | continue; | |
6223 | } | |
6224 | ||
6225 | /* This is a reloc against a local symbol. */ | |
6226 | ||
6227 | *rel_hash = NULL; | |
6228 | isym = finfo->internal_syms + r_symndx; | |
6229 | sec = finfo->sections[r_symndx]; | |
6230 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) | |
6231 | { | |
6232 | /* I suppose the backend ought to fill in the | |
6233 | section of any STT_SECTION symbol against a | |
6234 | processor specific section. */ | |
badd23e3 ILT |
6235 | if (sec != NULL && bfd_is_abs_section (sec)) |
6236 | r_symndx = 0; | |
6237 | else if (sec == NULL || sec->owner == NULL) | |
6ec3bb6a ILT |
6238 | { |
6239 | bfd_set_error (bfd_error_bad_value); | |
6240 | return false; | |
6241 | } | |
6ec3bb6a | 6242 | else |
013dec1a ILT |
6243 | { |
6244 | r_symndx = sec->output_section->target_index; | |
6245 | if (r_symndx == 0) | |
6246 | abort (); | |
6247 | } | |
6ec3bb6a ILT |
6248 | } |
6249 | else | |
6250 | { | |
6251 | if (finfo->indices[r_symndx] == -1) | |
6252 | { | |
6253 | unsigned long link; | |
6254 | const char *name; | |
6255 | asection *osec; | |
6256 | ||
6257 | if (finfo->info->strip == strip_all) | |
6258 | { | |
6259 | /* You can't do ld -r -s. */ | |
6260 | bfd_set_error (bfd_error_invalid_operation); | |
6261 | return false; | |
6262 | } | |
6263 | ||
6264 | /* This symbol was skipped earlier, but | |
6265 | since it is needed by a reloc, we | |
6266 | must output it now. */ | |
6267 | link = symtab_hdr->sh_link; | |
6268 | name = elf_string_from_elf_section (input_bfd, | |
6269 | link, | |
6270 | isym->st_name); | |
6271 | if (name == NULL) | |
6272 | return false; | |
6273 | ||
6274 | osec = sec->output_section; | |
6275 | isym->st_shndx = | |
6276 | elf_section_from_bfd_section (output_bfd, | |
6277 | osec); | |
013dec1a | 6278 | if (isym->st_shndx == (unsigned short) -1) |
6ec3bb6a ILT |
6279 | return false; |
6280 | ||
6281 | isym->st_value += sec->output_offset; | |
6282 | if (! finfo->info->relocateable) | |
6283 | isym->st_value += osec->vma; | |
6284 | ||
6285 | finfo->indices[r_symndx] = output_bfd->symcount; | |
6286 | ||
71edd06d | 6287 | if (! elf_link_output_sym (finfo, name, isym, sec)) |
6ec3bb6a ILT |
6288 | return false; |
6289 | } | |
6290 | ||
6291 | r_symndx = finfo->indices[r_symndx]; | |
6292 | } | |
6293 | ||
6294 | irela->r_info = ELF_R_INFO (r_symndx, | |
6295 | ELF_R_TYPE (irela->r_info)); | |
6296 | } | |
6297 | ||
6298 | /* Swap out the relocs. */ | |
374d2ef9 | 6299 | input_rel_hdr = &elf_section_data (o)->rel_hdr; |
6ec3bb6a ILT |
6300 | output_rel_hdr = &elf_section_data (o->output_section)->rel_hdr; |
6301 | BFD_ASSERT (output_rel_hdr->sh_entsize | |
6302 | == input_rel_hdr->sh_entsize); | |
374d2ef9 | 6303 | irela = internal_relocs; |
6ec3bb6a ILT |
6304 | irelaend = irela + o->reloc_count; |
6305 | if (input_rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) | |
6306 | { | |
6307 | Elf_External_Rel *erel; | |
6308 | ||
6309 | erel = ((Elf_External_Rel *) output_rel_hdr->contents | |
6310 | + o->output_section->reloc_count); | |
6311 | for (; irela < irelaend; irela++, erel++) | |
6312 | { | |
6313 | Elf_Internal_Rel irel; | |
6314 | ||
6315 | irel.r_offset = irela->r_offset; | |
6316 | irel.r_info = irela->r_info; | |
6317 | BFD_ASSERT (irela->r_addend == 0); | |
6318 | elf_swap_reloc_out (output_bfd, &irel, erel); | |
6319 | } | |
6320 | } | |
6321 | else | |
6322 | { | |
6323 | Elf_External_Rela *erela; | |
6324 | ||
6325 | BFD_ASSERT (input_rel_hdr->sh_entsize | |
6326 | == sizeof (Elf_External_Rela)); | |
6327 | erela = ((Elf_External_Rela *) output_rel_hdr->contents | |
6328 | + o->output_section->reloc_count); | |
6329 | for (; irela < irelaend; irela++, erela++) | |
6330 | elf_swap_reloca_out (output_bfd, irela, erela); | |
6331 | } | |
6332 | ||
6333 | o->output_section->reloc_count += o->reloc_count; | |
6334 | } | |
6335 | } | |
6336 | ||
6337 | /* Write out the modified section contents. */ | |
6338 | if (! bfd_set_section_contents (output_bfd, o->output_section, | |
6339 | finfo->contents, o->output_offset, | |
6340 | (o->_cooked_size != 0 | |
6341 | ? o->_cooked_size | |
6342 | : o->_raw_size))) | |
6343 | return false; | |
6344 | } | |
6345 | ||
6346 | return true; | |
6347 | } | |
6348 | ||
6349 | /* Generate a reloc when linking an ELF file. This is a reloc | |
6350 | requested by the linker, and does come from any input file. This | |
6351 | is used to build constructor and destructor tables when linking | |
6352 | with -Ur. */ | |
6353 | ||
6354 | static boolean | |
6355 | elf_reloc_link_order (output_bfd, info, output_section, link_order) | |
6356 | bfd *output_bfd; | |
6357 | struct bfd_link_info *info; | |
6358 | asection *output_section; | |
6359 | struct bfd_link_order *link_order; | |
6360 | { | |
6361 | const reloc_howto_type *howto; | |
6362 | long indx; | |
6363 | bfd_vma offset; | |
6364 | struct elf_link_hash_entry **rel_hash_ptr; | |
6365 | Elf_Internal_Shdr *rel_hdr; | |
6366 | ||
6367 | howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc); | |
6368 | if (howto == NULL) | |
6369 | { | |
6370 | bfd_set_error (bfd_error_bad_value); | |
6371 | return false; | |
6372 | } | |
6373 | ||
6374 | /* If this is an inplace reloc, we must write the addend into the | |
6375 | object file. */ | |
6376 | if (howto->partial_inplace | |
6377 | && link_order->u.reloc.p->addend != 0) | |
6378 | { | |
6379 | bfd_size_type size; | |
6380 | bfd_reloc_status_type rstat; | |
6381 | bfd_byte *buf; | |
6382 | boolean ok; | |
6383 | ||
6384 | size = bfd_get_reloc_size (howto); | |
6385 | buf = (bfd_byte *) bfd_zmalloc (size); | |
6386 | if (buf == (bfd_byte *) NULL) | |
6387 | { | |
6388 | bfd_set_error (bfd_error_no_memory); | |
6389 | return false; | |
6390 | } | |
6391 | rstat = _bfd_relocate_contents (howto, output_bfd, | |
6392 | link_order->u.reloc.p->addend, buf); | |
6393 | switch (rstat) | |
6394 | { | |
6395 | case bfd_reloc_ok: | |
6396 | break; | |
6397 | default: | |
6398 | case bfd_reloc_outofrange: | |
6399 | abort (); | |
6400 | case bfd_reloc_overflow: | |
6401 | if (! ((*info->callbacks->reloc_overflow) | |
6402 | (info, | |
6403 | (link_order->type == bfd_section_reloc_link_order | |
6404 | ? bfd_section_name (output_bfd, | |
6405 | link_order->u.reloc.p->u.section) | |
6406 | : link_order->u.reloc.p->u.name), | |
6407 | howto->name, link_order->u.reloc.p->addend, | |
6408 | (bfd *) NULL, (asection *) NULL, (bfd_vma) 0))) | |
6409 | { | |
6410 | free (buf); | |
6411 | return false; | |
6412 | } | |
6413 | break; | |
6414 | } | |
6415 | ok = bfd_set_section_contents (output_bfd, output_section, (PTR) buf, | |
6416 | (file_ptr) link_order->offset, size); | |
6417 | free (buf); | |
6418 | if (! ok) | |
6419 | return false; | |
6420 | } | |
6421 | ||
6422 | /* Figure out the symbol index. */ | |
6423 | rel_hash_ptr = (elf_section_data (output_section)->rel_hashes | |
6424 | + output_section->reloc_count); | |
6425 | if (link_order->type == bfd_section_reloc_link_order) | |
6426 | { | |
013dec1a ILT |
6427 | indx = link_order->u.reloc.p->u.section->target_index; |
6428 | if (indx == 0) | |
6429 | abort (); | |
6ec3bb6a ILT |
6430 | *rel_hash_ptr = NULL; |
6431 | } | |
6432 | else | |
6433 | { | |
6434 | struct elf_link_hash_entry *h; | |
6435 | ||
6436 | h = elf_link_hash_lookup (elf_hash_table (info), | |
6437 | link_order->u.reloc.p->u.name, | |
6438 | false, false, true); | |
6439 | if (h != NULL) | |
6440 | { | |
6441 | /* Setting the index to -2 tells elf_link_output_extsym that | |
6442 | this symbol is used by a reloc. */ | |
6443 | h->indx = -2; | |
6444 | *rel_hash_ptr = h; | |
6445 | indx = 0; | |
6446 | } | |
6447 | else | |
6448 | { | |
6449 | if (! ((*info->callbacks->unattached_reloc) | |
6450 | (info, link_order->u.reloc.p->u.name, (bfd *) NULL, | |
6451 | (asection *) NULL, (bfd_vma) 0))) | |
6452 | return false; | |
6453 | indx = 0; | |
6454 | } | |
6455 | } | |
6456 | ||
6457 | /* The address of a reloc is relative to the section in a | |
6458 | relocateable file, and is a virtual address in an executable | |
6459 | file. */ | |
6460 | offset = link_order->offset; | |
6461 | if (! info->relocateable) | |
6462 | offset += output_section->vma; | |
6463 | ||
6464 | rel_hdr = &elf_section_data (output_section)->rel_hdr; | |
6465 | ||
6466 | if (rel_hdr->sh_type == SHT_REL) | |
6467 | { | |
6468 | Elf_Internal_Rel irel; | |
6469 | Elf_External_Rel *erel; | |
6470 | ||
6471 | irel.r_offset = offset; | |
6472 | irel.r_info = ELF_R_INFO (indx, howto->type); | |
6473 | erel = ((Elf_External_Rel *) rel_hdr->contents | |
6474 | + output_section->reloc_count); | |
6475 | elf_swap_reloc_out (output_bfd, &irel, erel); | |
6476 | } | |
6477 | else | |
6478 | { | |
6479 | Elf_Internal_Rela irela; | |
6480 | Elf_External_Rela *erela; | |
6481 | ||
6482 | irela.r_offset = offset; | |
6483 | irela.r_info = ELF_R_INFO (indx, howto->type); | |
6484 | irela.r_addend = link_order->u.reloc.p->addend; | |
6485 | erela = ((Elf_External_Rela *) rel_hdr->contents | |
6486 | + output_section->reloc_count); | |
6487 | elf_swap_reloca_out (output_bfd, &irela, erela); | |
6488 | } | |
6489 | ||
6490 | ++output_section->reloc_count; | |
6491 | ||
6492 | return true; | |
6493 | } |