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46dd0622 | 1 | /* BFD back-end for Hitachi Super-H COFF binaries. |
6812b607 | 2 | Copyright 1993, 1994 Free Software Foundation, Inc. |
46dd0622 SC |
3 | Contributed by Cygnus Support. |
4 | Written by Steve Chamberlain, <[email protected]>. | |
5 | ||
6 | This file is part of BFD, the Binary File Descriptor library. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
21 | ||
22 | #include "bfd.h" | |
23 | #include "sysdep.h" | |
46dd0622 | 24 | #include "obstack.h" |
6812b607 ILT |
25 | #include "libbfd.h" |
26 | #include "bfdlink.h" | |
46dd0622 SC |
27 | #include "coff/sh.h" |
28 | #include "coff/internal.h" | |
29 | #include "libcoff.h" | |
46dd0622 | 30 | |
cf345e36 | 31 | static bfd_reloc_status_type sh_reloc(); |
46dd0622 SC |
32 | |
33 | ||
cf345e36 SC |
34 | static reloc_howto_type r_imm32 = |
35 | {R_SH_IMM32, 0, 2, 32, false, 0, | |
36 | complain_overflow_bitfield, sh_reloc,"r_imm32", true, 0xffffffff,0xffffffff, false}; | |
46dd0622 | 37 | |
46dd0622 | 38 | |
cf345e36 | 39 | /*#define SELECT_RELOC(x,y) x->howto = (&r_imm32)*/ |
46dd0622 SC |
40 | |
41 | ||
42 | #define BADMAG(x) SHBADMAG(x) | |
43 | #define SH 1 /* Customize coffcode.h */ | |
44 | ||
45 | #define __A_MAGIC_SET__ | |
46 | ||
47 | /* Code to swap in the reloc */ | |
cf345e36 | 48 | #if 0 |
46dd0622 SC |
49 | #define SWAP_IN_RELOC_OFFSET bfd_h_get_32 |
50 | #define SWAP_OUT_RELOC_OFFSET bfd_h_put_32 | |
cf345e36 | 51 | #endif |
46dd0622 SC |
52 | #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \ |
53 | dst->r_stuff[0] = 'S'; \ | |
54 | dst->r_stuff[1] = 'C'; | |
55 | ||
56 | /* Code to turn a r_type into a howto ptr, uses the above howto table | |
57 | */ | |
cf345e36 SC |
58 | static long |
59 | get_symbol_value (symbol) | |
60 | asymbol *symbol; | |
61 | { | |
62 | long relocation = 0; | |
63 | ||
64 | if (bfd_is_com_section (symbol->section)) | |
65 | { | |
66 | relocation = 0; | |
67 | } | |
68 | else | |
69 | { | |
70 | relocation = symbol->value + | |
71 | symbol->section->output_section->vma + | |
72 | symbol->section->output_offset; | |
73 | } | |
74 | ||
75 | return(relocation); | |
76 | } | |
46dd0622 SC |
77 | |
78 | static void | |
6812b607 ILT |
79 | rtype2howto (internal, dst) |
80 | arelent * internal; | |
81 | struct internal_reloc *dst; | |
46dd0622 SC |
82 | { |
83 | switch (dst->r_type) | |
84 | { | |
85 | default: | |
cf345e36 | 86 | abort(); |
46dd0622 | 87 | case R_SH_IMM32: |
cf345e36 | 88 | |
46dd0622 SC |
89 | break; |
90 | } | |
91 | } | |
92 | ||
cf345e36 | 93 | #define RTYPE2HOWTO(x,y) ((x)->howto = &r_imm32) |
46dd0622 SC |
94 | |
95 | /* Perform any necessaru magic to the addend in a reloc entry */ | |
96 | ||
cf345e36 | 97 | #if 0 |
46dd0622 SC |
98 | #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \ |
99 | cache_ptr->addend = ext_reloc.r_offset; | |
100 | ||
cf345e36 SC |
101 | #endif |
102 | ||
103 | ||
104 | /* Compute the addend of a reloc. If the reloc is to a common symbol, | |
105 | the object file contains the value of the common symbol. By the | |
106 | time this is called, the linker may be using a different symbol | |
107 | from a different object file with a different value. Therefore, we | |
108 | hack wildly to locate the original symbol from this file so that we | |
109 | can make the correct adjustment. This macro sets coffsym to the | |
110 | symbol from the original file, and uses it to set the addend value | |
111 | correctly. If this is not a common symbol, the usual addend | |
112 | calculation is done, except that an additional tweak is needed for | |
113 | PC relative relocs. | |
114 | FIXME: This macro refers to symbols and asect; these are from the | |
115 | calling function, not the macro arguments. */ | |
116 | ||
117 | #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \ | |
118 | { \ | |
119 | coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \ | |
120 | if (ptr && bfd_asymbol_bfd (ptr) != abfd) \ | |
121 | coffsym = (obj_symbols (abfd) \ | |
122 | + (cache_ptr->sym_ptr_ptr - symbols)); \ | |
123 | else if (ptr) \ | |
124 | coffsym = coff_symbol_from (abfd, ptr); \ | |
125 | if (coffsym != (coff_symbol_type *) NULL \ | |
126 | && coffsym->native->u.syment.n_scnum == 0) \ | |
127 | cache_ptr->addend = - coffsym->native->u.syment.n_value; \ | |
128 | else if (ptr && bfd_asymbol_bfd (ptr) == abfd \ | |
129 | && ptr->section != (asection *) NULL) \ | |
130 | cache_ptr->addend = - (ptr->section->vma + ptr->value); \ | |
131 | else \ | |
132 | cache_ptr->addend = 0; \ | |
133 | } | |
134 | ||
135 | #if 0 | |
46dd0622 SC |
136 | #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \ |
137 | reloc_processing(relent, reloc, symbols, abfd, section) | |
cf345e36 SC |
138 | #endif |
139 | ||
140 | /* this function is in charge of performing all the 29k relocations */ | |
141 | ||
142 | static bfd_reloc_status_type | |
143 | sh_reloc (abfd, reloc_entry, symbol_in, data, input_section, output_bfd, | |
144 | error_message) | |
145 | bfd *abfd; | |
146 | arelent *reloc_entry; | |
147 | asymbol *symbol_in; | |
148 | PTR data; | |
149 | asection *input_section; | |
150 | bfd *output_bfd; | |
151 | char **error_message; | |
152 | { | |
153 | /* the consth relocation comes in two parts, we have to remember | |
154 | the state between calls, in these variables */ | |
155 | unsigned long insn; | |
156 | unsigned long sym_value; | |
157 | unsigned short r_type; | |
158 | ||
159 | unsigned long addr = reloc_entry->address ; /*+ input_section->vma*/ | |
160 | bfd_byte *hit_data =addr + (bfd_byte *)(data); | |
161 | ||
162 | r_type = reloc_entry->howto->type; | |
163 | ||
164 | if (output_bfd) { | |
165 | /* Partial linking - do nothing */ | |
166 | reloc_entry->address += input_section->output_offset; | |
167 | return bfd_reloc_ok; | |
168 | } | |
169 | ||
170 | if (symbol_in != NULL | |
171 | && bfd_is_und_section (symbol_in->section)) | |
172 | { | |
173 | /* Keep the state machine happy in case we're called again */ | |
174 | return (bfd_reloc_undefined); | |
175 | } | |
176 | ||
177 | ||
178 | sym_value = get_symbol_value(symbol_in); | |
179 | ||
180 | switch (r_type) | |
181 | { | |
182 | case R_SH_IMM32: | |
183 | /* We ignore the previous contents ! */ | |
184 | insn = sym_value + reloc_entry->addend; | |
185 | bfd_put_32(abfd, insn, hit_data); | |
186 | break; | |
187 | default: | |
188 | *error_message = "Unrecognized reloc"; | |
189 | return (bfd_reloc_dangerous); | |
190 | } | |
191 | ||
192 | ||
193 | return(bfd_reloc_ok); | |
194 | } | |
195 | ||
196 | /* The reloc processing routine for the optimized COFF linker. */ | |
197 | ||
198 | static boolean | |
199 | coff_sh_relocate_section (output_bfd, info, input_bfd, input_section, | |
200 | contents, relocs, syms, sections) | |
201 | bfd *output_bfd; | |
202 | struct bfd_link_info *info; | |
203 | bfd *input_bfd; | |
204 | asection *input_section; | |
205 | bfd_byte *contents; | |
206 | struct internal_reloc *relocs; | |
207 | struct internal_syment *syms; | |
208 | asection **sections; | |
209 | { | |
210 | struct internal_reloc *rel; | |
211 | struct internal_reloc *relend; | |
212 | ||
213 | /* If we are performing a relocateable link, we don't need to do a | |
214 | thing. The caller will take care of adjusting the reloc | |
215 | addresses and symbol indices. */ | |
216 | if (info->relocateable) | |
217 | return true; | |
218 | ||
219 | ||
220 | rel = relocs; | |
221 | relend = rel + input_section->reloc_count; | |
222 | for (; rel < relend; rel++) | |
223 | { | |
224 | long symndx; | |
225 | bfd_byte *loc; | |
226 | struct coff_link_hash_entry *h; | |
227 | struct internal_syment *sym; | |
228 | asection *sec; | |
229 | bfd_vma val; | |
230 | bfd_reloc_status_type rstat; | |
231 | ||
232 | symndx = rel->r_symndx; | |
233 | loc = contents + rel->r_vaddr - input_section->vma; | |
234 | ||
235 | if (symndx == -1) | |
236 | h = NULL; | |
237 | else | |
238 | h = obj_coff_sym_hashes (input_bfd)[symndx]; | |
239 | ||
240 | sym = NULL; | |
241 | sec = NULL; | |
242 | val = 0; | |
243 | ||
244 | ||
245 | if (h == NULL) | |
246 | { | |
247 | if (symndx == -1) | |
248 | sec = bfd_abs_section_ptr; | |
249 | else | |
250 | { | |
251 | sym = syms + symndx; | |
252 | sec = sections[symndx]; | |
253 | val = (sec->output_section->vma | |
254 | + sec->output_offset | |
255 | + sym->n_value | |
256 | - sec->vma | |
257 | - sec->vma); | |
258 | } | |
259 | } | |
260 | else | |
261 | { | |
262 | if (h->root.type == bfd_link_hash_defined) | |
263 | { | |
264 | sec = h->root.u.def.section; | |
265 | val = (h->root.u.def.value | |
266 | + sec->output_section->vma | |
267 | + sec->output_offset); | |
268 | } | |
269 | else | |
270 | { | |
271 | if (! ((*info->callbacks->undefined_symbol) | |
272 | (info, h->root.root.string, input_bfd, input_section, | |
273 | rel->r_vaddr - input_section->vma))) | |
274 | return false; | |
275 | } | |
276 | } | |
277 | ||
278 | switch (rel->r_type) | |
279 | { | |
280 | default: | |
281 | bfd_set_error (bfd_error_bad_value); | |
282 | return false; | |
283 | ||
284 | case R_SH_IMM32: | |
285 | { | |
286 | long x = bfd_get_32 (input_bfd, loc); | |
287 | x += val; | |
288 | bfd_put_32 (input_bfd, x, loc); | |
289 | ||
290 | } | |
291 | ||
292 | break; | |
293 | } | |
294 | } | |
295 | ||
296 | return true; | |
297 | } | |
46dd0622 SC |
298 | |
299 | static void | |
6812b607 ILT |
300 | reloc_processing (relent, reloc, symbols, abfd, section) |
301 | arelent * relent; | |
302 | struct internal_reloc *reloc; | |
303 | asymbol ** symbols; | |
304 | bfd * abfd; | |
305 | asection * section; | |
46dd0622 | 306 | { |
cf345e36 | 307 | asymbol *ptr; |
46dd0622 | 308 | relent->address = reloc->r_vaddr; |
cf345e36 | 309 | relent->howto = &r_imm32; |
46dd0622 | 310 | |
46dd0622 | 311 | |
cf345e36 | 312 | relent->sym_ptr_ptr = symbols + obj_convert(abfd)[reloc->r_symndx]; |
46dd0622 | 313 | |
cf345e36 | 314 | ptr = *(relent->sym_ptr_ptr); |
46dd0622 | 315 | |
cf345e36 SC |
316 | if (ptr |
317 | && bfd_asymbol_bfd(ptr) == abfd | |
318 | ||
319 | && ((ptr->flags & BSF_OLD_COMMON)== 0)) | |
320 | { | |
321 | relent->addend = 0; | |
322 | } | |
323 | else | |
324 | { | |
325 | relent->addend = 0; | |
326 | } | |
327 | relent->address-= section->vma; | |
46dd0622 | 328 | |
46dd0622 SC |
329 | } |
330 | ||
cf345e36 | 331 | #define coff_relocate_section coff_sh_relocate_section |
46dd0622 SC |
332 | |
333 | #include "coffcode.h" | |
334 | ||
2f3508ad | 335 | const bfd_target shcoff_vec = |
46dd0622 SC |
336 | { |
337 | "coff-sh", /* name */ | |
338 | bfd_target_coff_flavour, | |
339 | true, /* data byte order is big */ | |
340 | true, /* header byte order is big */ | |
341 | ||
342 | (HAS_RELOC | EXEC_P | /* object flags */ | |
343 | HAS_LINENO | HAS_DEBUG | | |
6812b607 | 344 | HAS_SYMS | HAS_LOCALS | WP_TEXT | BFD_IS_RELAXABLE ), |
46dd0622 SC |
345 | |
346 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ | |
347 | '_', /* leading symbol underscore */ | |
348 | '/', /* ar_pad_char */ | |
349 | 15, /* ar_max_namelen */ | |
350 | 2, /* minimum section alignment */ | |
cf345e36 | 351 | bfd_getb64, bfd_getb_signed_64, bfd_putb64, |
6812b607 ILT |
352 | bfd_getb32, bfd_getb_signed_32, bfd_putb32, |
353 | bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */ | |
cf345e36 | 354 | bfd_getb64, bfd_getb_signed_64, bfd_putb64, |
6812b607 ILT |
355 | bfd_getb32, bfd_getb_signed_32, bfd_putb32, |
356 | bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */ | |
46dd0622 SC |
357 | |
358 | {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ | |
359 | bfd_generic_archive_p, _bfd_dummy_target}, | |
360 | {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */ | |
361 | bfd_false}, | |
362 | {bfd_false, coff_write_object_contents, /* bfd_write_contents */ | |
363 | _bfd_write_archive_contents, bfd_false}, | |
364 | ||
6812b607 ILT |
365 | BFD_JUMP_TABLE_GENERIC (coff), |
366 | BFD_JUMP_TABLE_COPY (coff), | |
367 | BFD_JUMP_TABLE_CORE (_bfd_nocore), | |
368 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), | |
369 | BFD_JUMP_TABLE_SYMBOLS (coff), | |
370 | BFD_JUMP_TABLE_RELOCS (coff), | |
371 | BFD_JUMP_TABLE_WRITE (coff), | |
372 | BFD_JUMP_TABLE_LINK (coff), | |
2f3508ad | 373 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), |
6812b607 | 374 | |
46dd0622 SC |
375 | COFF_SWAP_TABLE, |
376 | }; | |
cf345e36 | 377 |