1 /* SPARC-specific support for 32-bit ELF
2 Copyright (C) 1993, 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 #include "elf/sparc.h"
27 static reloc_howto_type *elf32_sparc_reloc_type_lookup
28 PARAMS ((bfd *, bfd_reloc_code_real_type));
29 static void elf32_sparc_info_to_howto
30 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
31 static boolean elf32_sparc_check_relocs
32 PARAMS ((bfd *, struct bfd_link_info *, asection *,
33 const Elf_Internal_Rela *));
34 static boolean elf32_sparc_adjust_dynamic_symbol
35 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
36 static boolean elf32_sparc_adjust_dynindx
37 PARAMS ((struct elf_link_hash_entry *, PTR));
38 static boolean elf32_sparc_size_dynamic_sections
39 PARAMS ((bfd *, struct bfd_link_info *));
40 static boolean elf32_sparc_relocate_section
41 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
42 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
43 static boolean elf32_sparc_finish_dynamic_symbol
44 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
46 static boolean elf32_sparc_finish_dynamic_sections
47 PARAMS ((bfd *, struct bfd_link_info *));
48 static boolean elf32_sparc_merge_private_bfd_data PARAMS ((bfd *, bfd *));
49 static boolean elf32_sparc_object_p
51 static void elf32_sparc_final_write_processing
52 PARAMS ((bfd *, boolean));
54 /* The howto table and associated functions.
55 ??? elf64-sparc.c has its own copy for the moment to ease transition
56 since some of the relocation values have changed. At some point we'll
57 want elf64-sparc.c to switch over and use this table.
58 ??? Do we want to recognize (or flag as errors) some of the 64 bit entries
59 if the target is elf32-sparc.
62 static bfd_reloc_status_type sparc_elf_notsupported_reloc
63 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
64 static bfd_reloc_status_type sparc_elf_wdisp16_reloc
65 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
67 reloc_howto_type _bfd_sparc_elf_howto_table[] =
69 HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true),
70 HOWTO(R_SPARC_8, 0,0, 8,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_8", false,0,0x000000ff,true),
71 HOWTO(R_SPARC_16, 0,1,16,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_16", false,0,0x0000ffff,true),
72 HOWTO(R_SPARC_32, 0,2,32,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_32", false,0,0xffffffff,true),
73 HOWTO(R_SPARC_DISP8, 0,0, 8,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP8", false,0,0x000000ff,true),
74 HOWTO(R_SPARC_DISP16, 0,1,16,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP16", false,0,0x0000ffff,true),
75 HOWTO(R_SPARC_DISP32, 0,2,32,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP32", false,0,0x00ffffff,true),
76 HOWTO(R_SPARC_WDISP30, 2,2,30,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP30", false,0,0x3fffffff,true),
77 HOWTO(R_SPARC_WDISP22, 2,2,22,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP22", false,0,0x003fffff,true),
78 HOWTO(R_SPARC_HI22, 10,2,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HI22", false,0,0x003fffff,true),
79 HOWTO(R_SPARC_22, 0,2,22,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_22", false,0,0x003fffff,true),
80 HOWTO(R_SPARC_13, 0,2,13,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_13", false,0,0x00001fff,true),
81 HOWTO(R_SPARC_LO10, 0,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_LO10", false,0,0x000003ff,true),
82 HOWTO(R_SPARC_GOT10, 0,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GOT10", false,0,0x000003ff,true),
83 HOWTO(R_SPARC_GOT13, 0,2,13,false,0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_GOT13", false,0,0x00001fff,true),
84 HOWTO(R_SPARC_GOT22, 10,2,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GOT22", false,0,0x003fffff,true),
85 HOWTO(R_SPARC_PC10, 0,2,10,true, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_PC10", false,0,0x000003ff,true),
86 HOWTO(R_SPARC_PC22, 10,2,22,true, 0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_PC22", false,0,0x003fffff,true),
87 HOWTO(R_SPARC_WPLT30, 2,2,30,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WPLT30", false,0,0x3fffffff,true),
88 HOWTO(R_SPARC_COPY, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_COPY", false,0,0x00000000,true),
89 HOWTO(R_SPARC_GLOB_DAT, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GLOB_DAT",false,0,0x00000000,true),
90 HOWTO(R_SPARC_JMP_SLOT, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_JMP_SLOT",false,0,0x00000000,true),
91 HOWTO(R_SPARC_RELATIVE, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_RELATIVE",false,0,0x00000000,true),
92 HOWTO(R_SPARC_UA32, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_UA32", false,0,0x00000000,true),
93 HOWTO(R_SPARC_PLT32, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PLT32", false,0,0x00000000,true),
94 HOWTO(R_SPARC_HIPLT22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_HIPLT22", false,0,0x00000000,true),
95 HOWTO(R_SPARC_LOPLT10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_LOPLT10", false,0,0x00000000,true),
96 HOWTO(R_SPARC_PCPLT32, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PCPLT32", false,0,0x00000000,true),
97 HOWTO(R_SPARC_PCPLT22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PCPLT22", false,0,0x00000000,true),
98 HOWTO(R_SPARC_PCPLT10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PCPLT10", false,0,0x00000000,true),
99 HOWTO(R_SPARC_10, 0,2,10,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_10", false,0,0x000003ff,true),
100 HOWTO(R_SPARC_11, 0,2,11,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_11", false,0,0x000007ff,true),
101 /* ??? If we need to handle R_SPARC_64 then we need (figuratively)
102 --enable-64-bit-bfd. That causes objdump to print address as 64 bits
103 which we really don't want on an elf32-sparc system. There may be other
104 consequences which we may not want (at least not until it's proven they're
105 necessary) so for now these are only enabled ifdef BFD64. */
107 HOWTO(R_SPARC_64, 0,4,00,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_64", false,0,~ (bfd_vma) 0, true),
108 /* ??? These don't make sense except in 64 bit systems so they're disabled
109 ifndef BFD64 too (for now). */
110 HOWTO(R_SPARC_OLO10, 0,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_OLO10", false,0,0x000003ff,true),
111 HOWTO(R_SPARC_HH22, 42,2,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HH22", false,0,0x003fffff,true),
112 HOWTO(R_SPARC_HM10, 32,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HM10", false,0,0x000003ff,true),
113 HOWTO(R_SPARC_LM22, 10,2,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_LM22", false,0,0x003fffff,true),
114 HOWTO(R_SPARC_PC_HH22, 42,2,22,true, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HH22", false,0,0x003fffff,true),
115 HOWTO(R_SPARC_PC_HM10, 32,2,10,true, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HM10", false,0,0x000003ff,true),
116 HOWTO(R_SPARC_PC_LM22, 10,2,22,true, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_LM22", false,0,0x003fffff,true),
118 HOWTO(R_SPARC_64, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_64", false,0,0x00000000,true),
119 HOWTO(R_SPARC_OLO10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_OLO10", false,0,0x00000000,true),
120 HOWTO(R_SPARC_HH22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_HH22", false,0,0x00000000,true),
121 HOWTO(R_SPARC_HM10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_HM10", false,0,0x00000000,true),
122 HOWTO(R_SPARC_LM22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_LM22", false,0,0x00000000,true),
123 HOWTO(R_SPARC_PC_HH22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PC_HH22", false,0,0x00000000,true),
124 HOWTO(R_SPARC_PC_HM10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PC_HM10", false,0,0x00000000,true),
125 HOWTO(R_SPARC_PC_LM22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PC_LM22", false,0,0x00000000,true),
127 HOWTO(R_SPARC_WDISP16, 2,2,16,true, 0,complain_overflow_signed, sparc_elf_wdisp16_reloc,"R_SPARC_WDISP16", false,0,0x00000000,true),
128 HOWTO(R_SPARC_WDISP19, 2,2,22,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP19", false,0,0x0007ffff,true),
129 HOWTO(R_SPARC_UNUSED_42, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_UNUSED_42",false,0,0x00000000,true),
130 HOWTO(R_SPARC_7, 0,2, 7,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_7", false,0,0x0000007f,true),
131 HOWTO(R_SPARC_5, 0,2, 5,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_5", false,0,0x0000001f,true),
132 HOWTO(R_SPARC_6, 0,2, 6,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_6", false,0,0x0000003f,true),
135 struct elf_reloc_map {
136 unsigned char bfd_reloc_val;
137 unsigned char elf_reloc_val;
140 static CONST struct elf_reloc_map sparc_reloc_map[] =
142 { BFD_RELOC_NONE, R_SPARC_NONE, },
143 { BFD_RELOC_16, R_SPARC_16, },
144 { BFD_RELOC_8, R_SPARC_8 },
145 { BFD_RELOC_8_PCREL, R_SPARC_DISP8 },
146 /* ??? This might cause us to need separate functions in elf{32,64}-sparc.c
147 (we could still have just one table), but is this reloc ever used? */
148 { BFD_RELOC_CTOR, R_SPARC_32 }, /* @@ Assumes 32 bits. */
149 { BFD_RELOC_32, R_SPARC_32 },
150 { BFD_RELOC_32_PCREL, R_SPARC_DISP32 },
151 { BFD_RELOC_HI22, R_SPARC_HI22 },
152 { BFD_RELOC_LO10, R_SPARC_LO10, },
153 { BFD_RELOC_32_PCREL_S2, R_SPARC_WDISP30 },
154 { BFD_RELOC_SPARC22, R_SPARC_22 },
155 { BFD_RELOC_SPARC13, R_SPARC_13 },
156 { BFD_RELOC_SPARC_GOT10, R_SPARC_GOT10 },
157 { BFD_RELOC_SPARC_GOT13, R_SPARC_GOT13 },
158 { BFD_RELOC_SPARC_GOT22, R_SPARC_GOT22 },
159 { BFD_RELOC_SPARC_PC10, R_SPARC_PC10 },
160 { BFD_RELOC_SPARC_PC22, R_SPARC_PC22 },
161 { BFD_RELOC_SPARC_WPLT30, R_SPARC_WPLT30 },
162 { BFD_RELOC_SPARC_COPY, R_SPARC_COPY },
163 { BFD_RELOC_SPARC_GLOB_DAT, R_SPARC_GLOB_DAT },
164 { BFD_RELOC_SPARC_JMP_SLOT, R_SPARC_JMP_SLOT },
165 { BFD_RELOC_SPARC_RELATIVE, R_SPARC_RELATIVE },
166 { BFD_RELOC_SPARC_WDISP22, R_SPARC_WDISP22 },
167 /* ??? Doesn't dwarf use this? */
168 /*{ BFD_RELOC_SPARC_UA32, R_SPARC_UA32 }, not used?? */
169 {BFD_RELOC_SPARC_10, R_SPARC_10},
170 {BFD_RELOC_SPARC_11, R_SPARC_11},
171 {BFD_RELOC_SPARC_64, R_SPARC_64},
172 {BFD_RELOC_SPARC_OLO10, R_SPARC_OLO10},
173 {BFD_RELOC_SPARC_HH22, R_SPARC_HH22},
174 {BFD_RELOC_SPARC_HM10, R_SPARC_HM10},
175 {BFD_RELOC_SPARC_LM22, R_SPARC_LM22},
176 {BFD_RELOC_SPARC_PC_HH22, R_SPARC_PC_HH22},
177 {BFD_RELOC_SPARC_PC_HM10, R_SPARC_PC_HM10},
178 {BFD_RELOC_SPARC_PC_LM22, R_SPARC_PC_LM22},
179 {BFD_RELOC_SPARC_WDISP16, R_SPARC_WDISP16},
180 {BFD_RELOC_SPARC_WDISP19, R_SPARC_WDISP19},
181 {BFD_RELOC_SPARC_7, R_SPARC_7},
182 {BFD_RELOC_SPARC_5, R_SPARC_5},
183 {BFD_RELOC_SPARC_6, R_SPARC_6},
186 static reloc_howto_type *
187 elf32_sparc_reloc_type_lookup (abfd, code)
189 bfd_reloc_code_real_type code;
192 for (i = 0; i < sizeof (sparc_reloc_map) / sizeof (struct elf_reloc_map); i++)
194 if (sparc_reloc_map[i].bfd_reloc_val == code)
195 return &_bfd_sparc_elf_howto_table[(int) sparc_reloc_map[i].elf_reloc_val];
200 /* We need to use ELF32_R_TYPE so we have our own copy of this function,
201 and elf64-sparc.c has its own copy. */
204 elf32_sparc_info_to_howto (abfd, cache_ptr, dst)
207 Elf_Internal_Rela *dst;
209 BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_SPARC_max);
210 cache_ptr->howto = &_bfd_sparc_elf_howto_table[ELF32_R_TYPE(dst->r_info)];
213 /* For unsupported relocs. */
215 static bfd_reloc_status_type
216 sparc_elf_notsupported_reloc (abfd,
224 arelent *reloc_entry;
227 asection *input_section;
229 char **error_message;
231 return bfd_reloc_notsupported;
234 /* Handle the WDISP16 reloc. */
236 static bfd_reloc_status_type
237 sparc_elf_wdisp16_reloc (abfd,
245 arelent *reloc_entry;
248 asection *input_section;
250 char **error_message;
255 if (output_bfd != (bfd *) NULL
256 && (symbol->flags & BSF_SECTION_SYM) == 0
257 && (! reloc_entry->howto->partial_inplace
258 || reloc_entry->addend == 0))
260 reloc_entry->address += input_section->output_offset;
264 if (output_bfd != NULL)
265 return bfd_reloc_continue;
267 if (reloc_entry->address > input_section->_cooked_size)
268 return bfd_reloc_outofrange;
270 relocation = (symbol->value
271 + symbol->section->output_section->vma
272 + symbol->section->output_offset);
273 relocation += reloc_entry->addend;
274 relocation -= (input_section->output_section->vma
275 + input_section->output_offset);
276 relocation -= reloc_entry->address;
278 x = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
279 x |= ((((relocation >> 2) & 0xc000) << 6)
280 | ((relocation >> 2) & 0x3fff));
281 bfd_put_32 (abfd, x, (bfd_byte *) data + reloc_entry->address);
283 if ((bfd_signed_vma) relocation < - 0x40000
284 || (bfd_signed_vma) relocation > 0x3ffff)
285 return bfd_reloc_overflow;
290 /* Functions for the SPARC ELF linker. */
292 /* The name of the dynamic interpreter. This is put in the .interp
295 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
297 /* The nop opcode we use. */
299 #define SPARC_NOP 0x01000000
301 /* The size in bytes of an entry in the procedure linkage table. */
303 #define PLT_ENTRY_SIZE 12
305 /* The first four entries in a procedure linkage table are reserved,
306 and the initial contents are unimportant (we zero them out).
307 Subsequent entries look like this. See the SVR4 ABI SPARC
308 supplement to see how this works. */
310 /* sethi %hi(.-.plt0),%g1. We fill in the address later. */
311 #define PLT_ENTRY_WORD0 0x03000000
312 /* b,a .plt0. We fill in the offset later. */
313 #define PLT_ENTRY_WORD1 0x30800000
315 #define PLT_ENTRY_WORD2 SPARC_NOP
317 /* Look through the relocs for a section during the first phase, and
318 allocate space in the global offset table or procedure linkage
322 elf32_sparc_check_relocs (abfd, info, sec, relocs)
324 struct bfd_link_info *info;
326 const Elf_Internal_Rela *relocs;
329 Elf_Internal_Shdr *symtab_hdr;
330 struct elf_link_hash_entry **sym_hashes;
331 bfd_vma *local_got_offsets;
332 const Elf_Internal_Rela *rel;
333 const Elf_Internal_Rela *rel_end;
338 if (info->relocateable)
341 dynobj = elf_hash_table (info)->dynobj;
342 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
343 sym_hashes = elf_sym_hashes (abfd);
344 local_got_offsets = elf_local_got_offsets (abfd);
350 rel_end = relocs + sec->reloc_count;
351 for (rel = relocs; rel < rel_end; rel++)
353 unsigned long r_symndx;
354 struct elf_link_hash_entry *h;
356 r_symndx = ELF32_R_SYM (rel->r_info);
357 if (r_symndx < symtab_hdr->sh_info)
360 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
362 switch (ELF32_R_TYPE (rel->r_info))
367 /* This symbol requires a global offset table entry. */
371 /* Create the .got section. */
372 elf_hash_table (info)->dynobj = dynobj = abfd;
373 if (! _bfd_elf_create_got_section (dynobj, info))
379 sgot = bfd_get_section_by_name (dynobj, ".got");
380 BFD_ASSERT (sgot != NULL);
384 && (h != NULL || info->shared))
386 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
389 srelgot = bfd_make_section (dynobj, ".rela.got");
391 || ! bfd_set_section_flags (dynobj, srelgot,
398 || ! bfd_set_section_alignment (dynobj, srelgot, 2))
405 if (h->got_offset != (bfd_vma) -1)
407 /* We have already allocated space in the .got. */
410 h->got_offset = sgot->_raw_size;
412 /* Make sure this symbol is output as a dynamic symbol. */
413 if (h->dynindx == -1)
415 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
419 srelgot->_raw_size += sizeof (Elf32_External_Rela);
423 /* This is a global offset table entry for a local
425 if (local_got_offsets == NULL)
428 register unsigned int i;
430 size = symtab_hdr->sh_info * sizeof (bfd_vma);
431 local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size);
432 if (local_got_offsets == NULL)
434 elf_local_got_offsets (abfd) = local_got_offsets;
435 for (i = 0; i < symtab_hdr->sh_info; i++)
436 local_got_offsets[i] = (bfd_vma) -1;
438 if (local_got_offsets[r_symndx] != (bfd_vma) -1)
440 /* We have already allocated space in the .got. */
443 local_got_offsets[r_symndx] = sgot->_raw_size;
447 /* If we are generating a shared object, we need to
448 output a R_SPARC_RELATIVE reloc so that the
449 dynamic linker can adjust this GOT entry. */
450 srelgot->_raw_size += sizeof (Elf32_External_Rela);
454 sgot->_raw_size += 4;
456 /* If the .got section is more than 0x1000 bytes, we add
457 0x1000 to the value of _GLOBAL_OFFSET_TABLE_, so that 13
458 bit relocations have a greater chance of working. */
459 if (sgot->_raw_size >= 0x1000
460 && elf_hash_table (info)->hgot->root.u.def.value == 0)
461 elf_hash_table (info)->hgot->root.u.def.value = 0x1000;
466 /* This symbol requires a procedure linkage table entry. We
467 actually build the entry in adjust_dynamic_symbol,
468 because this might be a case of linking PIC code without
469 linking in any dynamic objects, in which case we don't
470 need to generate a procedure linkage table after all. */
474 /* It does not make sense to have a procedure linkage
475 table entry for a local symbol. */
476 bfd_set_error (bfd_error_bad_value);
480 /* Make sure this symbol is output as a dynamic symbol. */
481 if (h->dynindx == -1)
483 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
487 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
494 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
500 case R_SPARC_WDISP30:
501 case R_SPARC_WDISP22:
502 case R_SPARC_WDISP19:
503 case R_SPARC_WDISP16:
517 /* When creating a shared object, we must copy these
518 relocs into the output file. We create a reloc
519 section in dynobj and make room for the reloc. */
524 name = (bfd_elf_string_from_elf_section
526 elf_elfheader (abfd)->e_shstrndx,
527 elf_section_data (sec)->rel_hdr.sh_name));
531 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
532 && strcmp (bfd_get_section_name (abfd, sec),
535 sreloc = bfd_get_section_by_name (dynobj, name);
540 sreloc = bfd_make_section (dynobj, name);
541 flags = (SEC_HAS_CONTENTS | SEC_READONLY
542 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
543 if ((sec->flags & SEC_ALLOC) != 0)
544 flags |= SEC_ALLOC | SEC_LOAD;
546 || ! bfd_set_section_flags (dynobj, sreloc, flags)
547 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
552 sreloc->_raw_size += sizeof (Elf32_External_Rela);
565 /* Adjust a symbol defined by a dynamic object and referenced by a
566 regular object. The current definition is in some section of the
567 dynamic object, but we're not including those sections. We have to
568 change the definition to something the rest of the link can
572 elf32_sparc_adjust_dynamic_symbol (info, h)
573 struct bfd_link_info *info;
574 struct elf_link_hash_entry *h;
578 unsigned int power_of_two;
580 dynobj = elf_hash_table (info)->dynobj;
582 /* Make sure we know what is going on here. */
583 BFD_ASSERT (dynobj != NULL
584 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
585 || h->weakdef != NULL
586 || ((h->elf_link_hash_flags
587 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
588 && (h->elf_link_hash_flags
589 & ELF_LINK_HASH_REF_REGULAR) != 0
590 && (h->elf_link_hash_flags
591 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
593 /* If this is a function, put it in the procedure linkage table. We
594 will fill in the contents of the procedure linkage table later
595 (although we could actually do it here). The STT_NOTYPE
596 condition is a hack specifically for the Oracle libraries
597 delivered for Solaris; for some inexplicable reason, they define
598 some of their functions as STT_NOTYPE when they really should be
600 if (h->type == STT_FUNC
601 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0
602 || (h->type == STT_NOTYPE
603 && (h->root.type == bfd_link_hash_defined
604 || h->root.type == bfd_link_hash_defweak)
605 && (h->root.u.def.section->flags & SEC_CODE) != 0))
607 if (! elf_hash_table (info)->dynamic_sections_created)
609 /* This case can occur if we saw a WPLT30 reloc in an input
610 file, but none of the input files were dynamic objects.
611 In such a case, we don't actually need to build a
612 procedure linkage table, and we can just do a WDISP30
614 BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0);
618 s = bfd_get_section_by_name (dynobj, ".plt");
619 BFD_ASSERT (s != NULL);
621 /* The first four entries in .plt are reserved. */
622 if (s->_raw_size == 0)
623 s->_raw_size = 4 * PLT_ENTRY_SIZE;
625 /* The procedure linkage table has a maximum size. */
626 if (s->_raw_size >= 0x400000)
628 bfd_set_error (bfd_error_bad_value);
632 /* If this symbol is not defined in a regular file, and we are
633 not generating a shared library, then set the symbol to this
634 location in the .plt. This is required to make function
635 pointers compare as equal between the normal executable and
636 the shared library. */
638 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
640 h->root.u.def.section = s;
641 h->root.u.def.value = s->_raw_size;
644 h->plt_offset = s->_raw_size;
646 /* Make room for this entry. */
647 s->_raw_size += PLT_ENTRY_SIZE;
649 /* We also need to make an entry in the .rela.plt section. */
651 s = bfd_get_section_by_name (dynobj, ".rela.plt");
652 BFD_ASSERT (s != NULL);
653 s->_raw_size += sizeof (Elf32_External_Rela);
658 /* If this is a weak symbol, and there is a real definition, the
659 processor independent code will have arranged for us to see the
660 real definition first, and we can just use the same value. */
661 if (h->weakdef != NULL)
663 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
664 || h->weakdef->root.type == bfd_link_hash_defweak);
665 h->root.u.def.section = h->weakdef->root.u.def.section;
666 h->root.u.def.value = h->weakdef->root.u.def.value;
670 /* This is a reference to a symbol defined by a dynamic object which
671 is not a function. */
673 /* If we are creating a shared library, we must presume that the
674 only references to the symbol are via the global offset table.
675 For such cases we need not do anything here; the relocations will
676 be handled correctly by relocate_section. */
680 /* We must allocate the symbol in our .dynbss section, which will
681 become part of the .bss section of the executable. There will be
682 an entry for this symbol in the .dynsym section. The dynamic
683 object will contain position independent code, so all references
684 from the dynamic object to this symbol will go through the global
685 offset table. The dynamic linker will use the .dynsym entry to
686 determine the address it must put in the global offset table, so
687 both the dynamic object and the regular object will refer to the
688 same memory location for the variable. */
690 s = bfd_get_section_by_name (dynobj, ".dynbss");
691 BFD_ASSERT (s != NULL);
693 /* We must generate a R_SPARC_COPY reloc to tell the dynamic linker
694 to copy the initial value out of the dynamic object and into the
695 runtime process image. We need to remember the offset into the
696 .rel.bss section we are going to use. */
697 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
701 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
702 BFD_ASSERT (srel != NULL);
703 srel->_raw_size += sizeof (Elf32_External_Rela);
704 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
707 /* We need to figure out the alignment required for this symbol. I
708 have no idea how ELF linkers handle this. */
709 power_of_two = bfd_log2 (h->size);
710 if (power_of_two > 3)
713 /* Apply the required alignment. */
714 s->_raw_size = BFD_ALIGN (s->_raw_size,
715 (bfd_size_type) (1 << power_of_two));
716 if (power_of_two > bfd_get_section_alignment (dynobj, s))
718 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
722 /* Define the symbol as being at this point in the section. */
723 h->root.u.def.section = s;
724 h->root.u.def.value = s->_raw_size;
726 /* Increment the section size to make room for the symbol. */
727 s->_raw_size += h->size;
732 /* Set the sizes of the dynamic sections. */
735 elf32_sparc_size_dynamic_sections (output_bfd, info)
737 struct bfd_link_info *info;
744 dynobj = elf_hash_table (info)->dynobj;
745 BFD_ASSERT (dynobj != NULL);
747 if (elf_hash_table (info)->dynamic_sections_created)
749 /* Set the contents of the .interp section to the interpreter. */
752 s = bfd_get_section_by_name (dynobj, ".interp");
753 BFD_ASSERT (s != NULL);
754 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
755 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
758 /* Make space for the trailing nop in .plt. */
759 s = bfd_get_section_by_name (dynobj, ".plt");
760 BFD_ASSERT (s != NULL);
761 if (s->_raw_size > 0)
766 /* We may have created entries in the .rela.got section.
767 However, if we are not creating the dynamic sections, we will
768 not actually use these entries. Reset the size of .rela.got,
769 which will cause it to get stripped from the output file
771 s = bfd_get_section_by_name (dynobj, ".rela.got");
776 /* The check_relocs and adjust_dynamic_symbol entry points have
777 determined the sizes of the various dynamic sections. Allocate
781 for (s = dynobj->sections; s != NULL; s = s->next)
786 if ((s->flags & SEC_LINKER_CREATED) == 0)
789 /* It's OK to base decisions on the section name, because none
790 of the dynobj section names depend upon the input files. */
791 name = bfd_get_section_name (dynobj, s);
795 if (strncmp (name, ".rela", 5) == 0)
797 if (s->_raw_size == 0)
799 /* If we don't need this section, strip it from the
800 output file. This is to handle .rela.bss and
801 .rel.plt. We must create it in
802 create_dynamic_sections, because it must be created
803 before the linker maps input sections to output
804 sections. The linker does that before
805 adjust_dynamic_symbol is called, and it is that
806 function which decides whether anything needs to go
807 into these sections. */
815 /* If this relocation section applies to a read only
816 section, then we probably need a DT_TEXTREL entry. */
817 outname = bfd_get_section_name (output_bfd,
819 target = bfd_get_section_by_name (output_bfd, outname + 5);
821 && (target->flags & SEC_READONLY) != 0
822 && (target->flags & SEC_ALLOC) != 0)
825 if (strcmp (name, ".rela.plt") == 0)
828 /* We use the reloc_count field as a counter if we need
829 to copy relocs into the output file. */
833 else if (strcmp (name, ".plt") != 0
834 && strcmp (name, ".got") != 0)
836 /* It's not one of our sections, so don't allocate space. */
844 for (spp = &s->output_section->owner->sections;
845 *spp != s->output_section;
848 *spp = s->output_section->next;
849 --s->output_section->owner->section_count;
854 /* Allocate memory for the section contents. */
855 s->contents = (bfd_byte *) bfd_alloc (dynobj, s->_raw_size);
856 if (s->contents == NULL && s->_raw_size != 0)
860 if (elf_hash_table (info)->dynamic_sections_created)
862 /* Add some entries to the .dynamic section. We fill in the
863 values later, in elf32_sparc_finish_dynamic_sections, but we
864 must add the entries now so that we get the correct size for
865 the .dynamic section. The DT_DEBUG entry is filled in by the
866 dynamic linker and used by the debugger. */
869 if (! bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0))
875 if (! bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0)
876 || ! bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0)
877 || ! bfd_elf32_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
878 || ! bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 0))
882 if (! bfd_elf32_add_dynamic_entry (info, DT_RELA, 0)
883 || ! bfd_elf32_add_dynamic_entry (info, DT_RELASZ, 0)
884 || ! bfd_elf32_add_dynamic_entry (info, DT_RELAENT,
885 sizeof (Elf32_External_Rela)))
890 if (! bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0))
895 /* If we are generating a shared library, we generate a section
896 symbol for each output section for which we might need to copy
897 relocs. These are local symbols, which means that they must come
898 first in the dynamic symbol table. That means we must increment
899 the dynamic symbol index of every other dynamic symbol. */
905 for (s = output_bfd->sections; s != NULL; s = s->next)
907 if ((s->flags & SEC_LINKER_CREATED) != 0
908 || (s->flags & SEC_ALLOC) == 0)
911 elf_section_data (s)->dynindx = c + 1;
913 /* These symbols will have no names, so we don't need to
914 fiddle with dynstr_index. */
919 elf_link_hash_traverse (elf_hash_table (info),
920 elf32_sparc_adjust_dynindx,
922 elf_hash_table (info)->dynsymcount += c;
928 /* Increment the index of a dynamic symbol by a given amount. Called
929 via elf_link_hash_traverse. */
932 elf32_sparc_adjust_dynindx (h, cparg)
933 struct elf_link_hash_entry *h;
936 int *cp = (int *) cparg;
938 if (h->dynindx != -1)
943 /* Relocate a SPARC ELF section. */
946 elf32_sparc_relocate_section (output_bfd, info, input_bfd, input_section,
947 contents, relocs, local_syms, local_sections)
949 struct bfd_link_info *info;
951 asection *input_section;
953 Elf_Internal_Rela *relocs;
954 Elf_Internal_Sym *local_syms;
955 asection **local_sections;
958 Elf_Internal_Shdr *symtab_hdr;
959 struct elf_link_hash_entry **sym_hashes;
960 bfd_vma *local_got_offsets;
965 Elf_Internal_Rela *rel;
966 Elf_Internal_Rela *relend;
968 dynobj = elf_hash_table (info)->dynobj;
969 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
970 sym_hashes = elf_sym_hashes (input_bfd);
971 local_got_offsets = elf_local_got_offsets (input_bfd);
973 if (elf_hash_table (info)->hgot == NULL)
976 got_base = elf_hash_table (info)->hgot->root.u.def.value;
983 relend = relocs + input_section->reloc_count;
984 for (; rel < relend; rel++)
987 reloc_howto_type *howto;
988 unsigned long r_symndx;
989 struct elf_link_hash_entry *h;
990 Elf_Internal_Sym *sym;
993 bfd_reloc_status_type r;
995 r_type = ELF32_R_TYPE (rel->r_info);
996 if (r_type < 0 || r_type >= (int) R_SPARC_max)
998 bfd_set_error (bfd_error_bad_value);
1001 howto = _bfd_sparc_elf_howto_table + r_type;
1003 r_symndx = ELF32_R_SYM (rel->r_info);
1005 if (info->relocateable)
1007 /* This is a relocateable link. We don't have to change
1008 anything, unless the reloc is against a section symbol,
1009 in which case we have to adjust according to where the
1010 section symbol winds up in the output section. */
1011 if (r_symndx < symtab_hdr->sh_info)
1013 sym = local_syms + r_symndx;
1014 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
1016 sec = local_sections[r_symndx];
1017 rel->r_addend += sec->output_offset + sym->st_value;
1024 /* This is a final link. */
1028 if (r_symndx < symtab_hdr->sh_info)
1030 sym = local_syms + r_symndx;
1031 sec = local_sections[r_symndx];
1032 relocation = (sec->output_section->vma
1033 + sec->output_offset
1038 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1039 while (h->root.type == bfd_link_hash_indirect
1040 || h->root.type == bfd_link_hash_warning)
1041 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1042 if (h->root.type == bfd_link_hash_defined
1043 || h->root.type == bfd_link_hash_defweak)
1045 sec = h->root.u.def.section;
1046 if ((r_type == R_SPARC_WPLT30
1047 && h->plt_offset != (bfd_vma) -1)
1048 || ((r_type == R_SPARC_GOT10
1049 || r_type == R_SPARC_GOT13
1050 || r_type == R_SPARC_GOT22)
1051 && elf_hash_table (info)->dynamic_sections_created
1053 || (! info->symbolic && h->dynindx != -1)
1054 || (h->elf_link_hash_flags
1055 & ELF_LINK_HASH_DEF_REGULAR) == 0))
1057 && ((! info->symbolic && h->dynindx != -1)
1058 || (h->elf_link_hash_flags
1059 & ELF_LINK_HASH_DEF_REGULAR) == 0)
1060 && (r_type == R_SPARC_8
1061 || r_type == R_SPARC_16
1062 || r_type == R_SPARC_32
1063 || r_type == R_SPARC_DISP8
1064 || r_type == R_SPARC_DISP16
1065 || r_type == R_SPARC_DISP32
1066 || r_type == R_SPARC_WDISP30
1067 || r_type == R_SPARC_WDISP22
1068 || r_type == R_SPARC_WDISP19
1069 || r_type == R_SPARC_WDISP16
1070 || r_type == R_SPARC_HI22
1071 || r_type == R_SPARC_22
1072 || r_type == R_SPARC_13
1073 || r_type == R_SPARC_LO10
1074 || r_type == R_SPARC_UA32
1075 || ((r_type == R_SPARC_PC10
1076 || r_type == R_SPARC_PC22)
1077 && strcmp (h->root.root.string,
1078 "_GLOBAL_OFFSET_TABLE_") != 0))))
1080 /* In these cases, we don't need the relocation
1081 value. We check specially because in some
1082 obscure cases sec->output_section will be NULL. */
1086 relocation = (h->root.u.def.value
1087 + sec->output_section->vma
1088 + sec->output_offset);
1090 else if (h->root.type == bfd_link_hash_undefweak)
1092 else if (info->shared && !info->symbolic)
1096 if (! ((*info->callbacks->undefined_symbol)
1097 (info, h->root.root.string, input_bfd,
1098 input_section, rel->r_offset)))
1109 /* Relocation is to the entry for this symbol in the global
1113 sgot = bfd_get_section_by_name (dynobj, ".got");
1114 BFD_ASSERT (sgot != NULL);
1121 off = h->got_offset;
1122 BFD_ASSERT (off != (bfd_vma) -1);
1124 if (! elf_hash_table (info)->dynamic_sections_created
1126 && (info->symbolic || h->dynindx == -1)
1127 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
1129 /* This is actually a static link, or it is a
1130 -Bsymbolic link and the symbol is defined
1131 locally, or the symbol was forced to be local
1132 because of a version file. We must initialize
1133 this entry in the global offset table. Since the
1134 offset must always be a multiple of 4, we use the
1135 least significant bit to record whether we have
1136 initialized it already.
1138 When doing a dynamic link, we create a .rela.got
1139 relocation entry to initialize the value. This
1140 is done in the finish_dynamic_symbol routine. */
1145 bfd_put_32 (output_bfd, relocation,
1146 sgot->contents + off);
1151 relocation = sgot->output_offset + off - got_base;
1157 BFD_ASSERT (local_got_offsets != NULL
1158 && local_got_offsets[r_symndx] != (bfd_vma) -1);
1160 off = local_got_offsets[r_symndx];
1162 /* The offset must always be a multiple of 4. We use
1163 the least significant bit to record whether we have
1164 already processed this entry. */
1169 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1174 Elf_Internal_Rela outrel;
1176 /* We need to generate a R_SPARC_RELATIVE reloc
1177 for the dynamic linker. */
1178 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1179 BFD_ASSERT (srelgot != NULL);
1181 outrel.r_offset = (sgot->output_section->vma
1182 + sgot->output_offset
1184 outrel.r_info = ELF32_R_INFO (0, R_SPARC_RELATIVE);
1185 outrel.r_addend = 0;
1186 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
1187 (((Elf32_External_Rela *)
1189 + srelgot->reloc_count));
1190 ++srelgot->reloc_count;
1193 local_got_offsets[r_symndx] |= 1;
1196 relocation = sgot->output_offset + off - got_base;
1201 case R_SPARC_WPLT30:
1202 /* Relocation is to the entry for this symbol in the
1203 procedure linkage table. */
1204 BFD_ASSERT (h != NULL);
1206 if (h->plt_offset == (bfd_vma) -1)
1208 /* We didn't make a PLT entry for this symbol. This
1209 happens when statically linking PIC code, or when
1210 using -Bsymbolic. */
1216 splt = bfd_get_section_by_name (dynobj, ".plt");
1217 BFD_ASSERT (splt != NULL);
1220 relocation = (splt->output_section->vma
1221 + splt->output_offset
1228 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
1232 case R_SPARC_DISP16:
1233 case R_SPARC_DISP32:
1234 case R_SPARC_WDISP30:
1235 case R_SPARC_WDISP22:
1236 case R_SPARC_WDISP19:
1237 case R_SPARC_WDISP16:
1251 Elf_Internal_Rela outrel;
1254 /* When generating a shared object, these relocations
1255 are copied into the output file to be resolved at run
1262 name = (bfd_elf_string_from_elf_section
1264 elf_elfheader (input_bfd)->e_shstrndx,
1265 elf_section_data (input_section)->rel_hdr.sh_name));
1269 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
1270 && strcmp (bfd_get_section_name (input_bfd,
1274 sreloc = bfd_get_section_by_name (dynobj, name);
1275 BFD_ASSERT (sreloc != NULL);
1280 if (elf_section_data (input_section)->stab_info == NULL)
1281 outrel.r_offset = rel->r_offset;
1286 off = (_bfd_stab_section_offset
1287 (output_bfd, &elf_hash_table (info)->stab_info,
1289 &elf_section_data (input_section)->stab_info,
1291 if (off == (bfd_vma) -1)
1293 outrel.r_offset = off;
1296 outrel.r_offset += (input_section->output_section->vma
1297 + input_section->output_offset);
1300 memset (&outrel, 0, sizeof outrel);
1301 /* h->dynindx may be -1 if the symbol was marked to
1304 && ((! info->symbolic && h->dynindx != -1)
1305 || (h->elf_link_hash_flags
1306 & ELF_LINK_HASH_DEF_REGULAR) == 0))
1308 BFD_ASSERT (h->dynindx != -1);
1309 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1310 outrel.r_addend = rel->r_addend;
1314 if (r_type == R_SPARC_32)
1316 outrel.r_info = ELF32_R_INFO (0, R_SPARC_RELATIVE);
1317 outrel.r_addend = relocation + rel->r_addend;
1324 sec = local_sections[r_symndx];
1327 BFD_ASSERT (h->root.type == bfd_link_hash_defined
1329 == bfd_link_hash_defweak));
1330 sec = h->root.u.def.section;
1332 if (sec != NULL && bfd_is_abs_section (sec))
1334 else if (sec == NULL || sec->owner == NULL)
1336 bfd_set_error (bfd_error_bad_value);
1343 osec = sec->output_section;
1344 indx = elf_section_data (osec)->dynindx;
1349 outrel.r_info = ELF32_R_INFO (indx, r_type);
1350 outrel.r_addend = relocation + rel->r_addend;
1354 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
1355 (((Elf32_External_Rela *)
1357 + sreloc->reloc_count));
1358 ++sreloc->reloc_count;
1360 /* This reloc will be computed at runtime, so there's no
1361 need to do anything now, unless this is a RELATIVE
1362 reloc in an unallocated section. */
1364 || (input_section->flags & SEC_ALLOC) != 0
1365 || ELF32_R_TYPE (outrel.r_info) != R_SPARC_RELATIVE)
1374 if (r_type != R_SPARC_WDISP16)
1375 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1376 contents, rel->r_offset,
1377 relocation, rel->r_addend);
1382 relocation += rel->r_addend;
1383 relocation -= (input_section->output_section->vma
1384 + input_section->output_offset);
1385 relocation -= rel->r_offset;
1387 x = bfd_get_32 (input_bfd, contents + rel->r_offset);
1388 x |= ((((relocation >> 2) & 0xc000) << 6)
1389 | ((relocation >> 2) & 0x3fff));
1390 bfd_put_32 (input_bfd, x, contents + rel->r_offset);
1392 if ((bfd_signed_vma) relocation < - 0x40000
1393 || (bfd_signed_vma) relocation > 0x3ffff)
1394 r = bfd_reloc_overflow;
1399 if (r != bfd_reloc_ok)
1404 case bfd_reloc_outofrange:
1406 case bfd_reloc_overflow:
1411 name = h->root.root.string;
1414 name = bfd_elf_string_from_elf_section (input_bfd,
1415 symtab_hdr->sh_link,
1420 name = bfd_section_name (input_bfd, sec);
1422 if (! ((*info->callbacks->reloc_overflow)
1423 (info, name, howto->name, (bfd_vma) 0,
1424 input_bfd, input_section, rel->r_offset)))
1435 /* Finish up dynamic symbol handling. We set the contents of various
1436 dynamic sections here. */
1439 elf32_sparc_finish_dynamic_symbol (output_bfd, info, h, sym)
1441 struct bfd_link_info *info;
1442 struct elf_link_hash_entry *h;
1443 Elf_Internal_Sym *sym;
1447 dynobj = elf_hash_table (info)->dynobj;
1449 if (h->plt_offset != (bfd_vma) -1)
1453 Elf_Internal_Rela rela;
1455 /* This symbol has an entry in the procedure linkage table. Set
1458 BFD_ASSERT (h->dynindx != -1);
1460 splt = bfd_get_section_by_name (dynobj, ".plt");
1461 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
1462 BFD_ASSERT (splt != NULL && srela != NULL);
1464 /* Fill in the entry in the procedure linkage table. */
1465 bfd_put_32 (output_bfd,
1466 PLT_ENTRY_WORD0 + h->plt_offset,
1467 splt->contents + h->plt_offset);
1468 bfd_put_32 (output_bfd,
1470 + (((- (h->plt_offset + 4)) >> 2) & 0x3fffff)),
1471 splt->contents + h->plt_offset + 4);
1472 bfd_put_32 (output_bfd, PLT_ENTRY_WORD2,
1473 splt->contents + h->plt_offset + 8);
1475 /* Fill in the entry in the .rela.plt section. */
1476 rela.r_offset = (splt->output_section->vma
1477 + splt->output_offset
1479 rela.r_info = ELF32_R_INFO (h->dynindx, R_SPARC_JMP_SLOT);
1481 bfd_elf32_swap_reloca_out (output_bfd, &rela,
1482 ((Elf32_External_Rela *) srela->contents
1483 + h->plt_offset / PLT_ENTRY_SIZE - 4));
1485 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1487 /* Mark the symbol as undefined, rather than as defined in
1488 the .plt section. Leave the value alone. */
1489 sym->st_shndx = SHN_UNDEF;
1493 if (h->got_offset != (bfd_vma) -1)
1497 Elf_Internal_Rela rela;
1499 /* This symbol has an entry in the global offset table. Set it
1502 sgot = bfd_get_section_by_name (dynobj, ".got");
1503 srela = bfd_get_section_by_name (dynobj, ".rela.got");
1504 BFD_ASSERT (sgot != NULL && srela != NULL);
1506 rela.r_offset = (sgot->output_section->vma
1507 + sgot->output_offset
1508 + (h->got_offset &~ 1));
1510 /* If this is a -Bsymbolic link, and the symbol is defined
1511 locally, we just want to emit a RELATIVE reloc. Likewise if
1512 the symbol was forced to be local because of a version file.
1513 The entry in the global offset table will already have been
1514 initialized in the relocate_section function. */
1516 && (info->symbolic || h->dynindx == -1)
1517 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
1518 rela.r_info = ELF32_R_INFO (0, R_SPARC_RELATIVE);
1521 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got_offset);
1522 rela.r_info = ELF32_R_INFO (h->dynindx, R_SPARC_GLOB_DAT);
1526 bfd_elf32_swap_reloca_out (output_bfd, &rela,
1527 ((Elf32_External_Rela *) srela->contents
1528 + srela->reloc_count));
1529 ++srela->reloc_count;
1532 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
1535 Elf_Internal_Rela rela;
1537 /* This symbols needs a copy reloc. Set it up. */
1539 BFD_ASSERT (h->dynindx != -1);
1541 s = bfd_get_section_by_name (h->root.u.def.section->owner,
1543 BFD_ASSERT (s != NULL);
1545 rela.r_offset = (h->root.u.def.value
1546 + h->root.u.def.section->output_section->vma
1547 + h->root.u.def.section->output_offset);
1548 rela.r_info = ELF32_R_INFO (h->dynindx, R_SPARC_COPY);
1550 bfd_elf32_swap_reloca_out (output_bfd, &rela,
1551 ((Elf32_External_Rela *) s->contents
1556 /* Mark some specially defined symbols as absolute. */
1557 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
1558 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
1559 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
1560 sym->st_shndx = SHN_ABS;
1565 /* Finish up the dynamic sections. */
1568 elf32_sparc_finish_dynamic_sections (output_bfd, info)
1570 struct bfd_link_info *info;
1576 dynobj = elf_hash_table (info)->dynobj;
1578 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
1580 if (elf_hash_table (info)->dynamic_sections_created)
1583 Elf32_External_Dyn *dyncon, *dynconend;
1585 splt = bfd_get_section_by_name (dynobj, ".plt");
1586 BFD_ASSERT (splt != NULL && sdyn != NULL);
1588 dyncon = (Elf32_External_Dyn *) sdyn->contents;
1589 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
1590 for (; dyncon < dynconend; dyncon++)
1592 Elf_Internal_Dyn dyn;
1596 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1600 case DT_PLTGOT: name = ".plt"; size = false; break;
1601 case DT_PLTRELSZ: name = ".rela.plt"; size = true; break;
1602 case DT_JMPREL: name = ".rela.plt"; size = false; break;
1603 default: name = NULL; size = false; break;
1610 s = bfd_get_section_by_name (output_bfd, name);
1616 dyn.d_un.d_ptr = s->vma;
1619 if (s->_cooked_size != 0)
1620 dyn.d_un.d_val = s->_cooked_size;
1622 dyn.d_un.d_val = s->_raw_size;
1625 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1629 /* Clear the first four entries in the procedure linkage table,
1630 and put a nop in the last four bytes. */
1631 if (splt->_raw_size > 0)
1633 memset (splt->contents, 0, 4 * PLT_ENTRY_SIZE);
1634 bfd_put_32 (output_bfd, SPARC_NOP,
1635 splt->contents + splt->_raw_size - 4);
1638 elf_section_data (splt->output_section)->this_hdr.sh_entsize =
1642 /* Set the first entry in the global offset table to the address of
1643 the dynamic section. */
1644 sgot = bfd_get_section_by_name (dynobj, ".got");
1645 BFD_ASSERT (sgot != NULL);
1646 if (sgot->_raw_size > 0)
1649 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
1651 bfd_put_32 (output_bfd,
1652 sdyn->output_section->vma + sdyn->output_offset,
1656 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
1662 Elf_Internal_Sym sym;
1665 /* Set up the section symbols for the output sections. */
1667 sdynsym = bfd_get_section_by_name (dynobj, ".dynsym");
1668 BFD_ASSERT (sdynsym != NULL);
1672 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
1676 for (s = output_bfd->sections; s != NULL; s = s->next)
1680 if (elf_section_data (s)->dynindx == 0)
1683 sym.st_value = s->vma;
1685 indx = elf_section_data (s)->this_idx;
1686 BFD_ASSERT (indx > 0);
1687 sym.st_shndx = indx;
1689 bfd_elf32_swap_symbol_out (output_bfd, &sym,
1690 (PTR) (((Elf32_External_Sym *)
1692 + elf_section_data (s)->dynindx));
1697 /* Set the sh_info field of the output .dynsym section to the
1698 index of the first global symbol. */
1699 elf_section_data (sdynsym->output_section)->this_hdr.sh_info = c + 1;
1705 /* Functions for dealing with the e_flags field.
1707 We don't define set_private_flags or copy_private_bfd_data because
1708 the only currently defined values are based on the bfd mach number,
1709 so we use the latter instead and defer setting e_flags until the
1710 file is written out. */
1712 /* Merge backend specific data from an object file to the output
1713 object file when linking. */
1716 elf32_sparc_merge_private_bfd_data (ibfd, obfd)
1722 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1723 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1729 /* ??? The native linker doesn't do this so we can't (otherwise gcc would
1730 have to know which linker is being used). Instead, the native linker
1731 bumps up the architecture level when it has to. However, I still think
1732 warnings like these are good, so it would be nice to have them turned on
1735 /* If the output machine is normal sparc, we can't allow v9 input files. */
1736 if (bfd_get_mach (obfd) == bfd_mach_sparc
1737 && (bfd_get_mach (ibfd) == bfd_mach_sparc_v8plus
1738 || bfd_get_mach (ibfd) == bfd_mach_sparc_v8plusa))
1741 (*_bfd_error_handler)
1742 ("%s: compiled for a v8plus system and target is v8",
1743 bfd_get_filename (ibfd));
1745 /* If the output machine is v9, we can't allow v9+vis input files. */
1746 if (bfd_get_mach (obfd) == bfd_mach_sparc_v8plus
1747 && bfd_get_mach (ibfd) == bfd_mach_sparc_v8plusa)
1750 (*_bfd_error_handler)
1751 ("%s: compiled for a v8plusa system and target is v8plus",
1752 bfd_get_filename (ibfd));
1755 if (bfd_get_mach (ibfd) >= bfd_mach_sparc_v9)
1758 (*_bfd_error_handler)
1759 ("%s: compiled for a 64 bit system and target is 32 bit",
1760 bfd_get_filename (ibfd));
1762 else if (bfd_get_mach (obfd) < bfd_get_mach (ibfd))
1763 bfd_set_arch_mach (obfd, bfd_arch_sparc, bfd_get_mach (ibfd));
1768 bfd_set_error (bfd_error_bad_value);
1775 /* Set the right machine number. */
1778 elf32_sparc_object_p (abfd)
1781 if (elf_elfheader (abfd)->e_machine == EM_SPARC32PLUS)
1783 if (elf_elfheader (abfd)->e_flags & EF_SPARC_SUN_US1)
1784 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc,
1785 bfd_mach_sparc_v8plusa);
1786 else if (elf_elfheader (abfd)->e_flags & EF_SPARC_32PLUS)
1787 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc,
1788 bfd_mach_sparc_v8plus);
1793 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, bfd_mach_sparc);
1796 /* The final processing done just before writing out the object file.
1797 We need to set the e_machine field appropriately. */
1800 elf32_sparc_final_write_processing (abfd, linker)
1804 switch (bfd_get_mach (abfd))
1806 case bfd_mach_sparc :
1807 break; /* nothing to do */
1808 case bfd_mach_sparc_v8plus :
1809 elf_elfheader (abfd)->e_machine = EM_SPARC32PLUS;
1810 elf_elfheader (abfd)->e_flags &=~ EF_SPARC_32PLUS_MASK;
1811 elf_elfheader (abfd)->e_flags |= EF_SPARC_32PLUS;
1813 case bfd_mach_sparc_v8plusa :
1814 elf_elfheader (abfd)->e_machine = EM_SPARC32PLUS;
1815 elf_elfheader (abfd)->e_flags &=~ EF_SPARC_32PLUS_MASK;
1816 elf_elfheader (abfd)->e_flags |= EF_SPARC_32PLUS | EF_SPARC_SUN_US1;
1823 #define TARGET_BIG_SYM bfd_elf32_sparc_vec
1824 #define TARGET_BIG_NAME "elf32-sparc"
1825 #define ELF_ARCH bfd_arch_sparc
1826 #define ELF_MACHINE_CODE EM_SPARC
1827 #define ELF_MACHINE_ALT1 EM_SPARC32PLUS
1828 #define ELF_MAXPAGESIZE 0x10000
1830 #define bfd_elf32_bfd_reloc_type_lookup elf32_sparc_reloc_type_lookup
1831 #define elf_info_to_howto elf32_sparc_info_to_howto
1832 #define elf_backend_create_dynamic_sections \
1833 _bfd_elf_create_dynamic_sections
1834 #define elf_backend_check_relocs elf32_sparc_check_relocs
1835 #define elf_backend_adjust_dynamic_symbol \
1836 elf32_sparc_adjust_dynamic_symbol
1837 #define elf_backend_size_dynamic_sections \
1838 elf32_sparc_size_dynamic_sections
1839 #define elf_backend_relocate_section elf32_sparc_relocate_section
1840 #define elf_backend_finish_dynamic_symbol \
1841 elf32_sparc_finish_dynamic_symbol
1842 #define elf_backend_finish_dynamic_sections \
1843 elf32_sparc_finish_dynamic_sections
1844 #define bfd_elf32_bfd_merge_private_bfd_data \
1845 elf32_sparc_merge_private_bfd_data
1846 #define elf_backend_object_p elf32_sparc_object_p
1847 #define elf_backend_final_write_processing \
1848 elf32_sparc_final_write_processing
1849 #define elf_backend_want_got_plt 0
1850 #define elf_backend_plt_readonly 0
1851 #define elf_backend_want_plt_sym 1
1853 #include "elf32-target.h"