Commit | Line | Data |
---|---|---|
e4b6b3e7 | 1 | /* Intel 80386/80486-specific support for 32-bit ELF |
30dc85f1 | 2 | Copyright 1993, 1994, 1995 Free Software Foundation, Inc. |
e4b6b3e7 ILT |
3 | |
4 | This file is part of BFD, the Binary File Descriptor library. | |
5 | ||
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. | |
10 | ||
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. | |
15 | ||
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., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
e4b6b3e7 ILT |
20 | #include "bfd.h" |
21 | #include "sysdep.h" | |
013dec1a | 22 | #include "bfdlink.h" |
e4b6b3e7 ILT |
23 | #include "libbfd.h" |
24 | #include "libelf.h" | |
25 | ||
30dc85f1 | 26 | static reloc_howto_type *elf_i386_reloc_type_lookup |
013dec1a ILT |
27 | PARAMS ((bfd *, bfd_reloc_code_real_type)); |
28 | static void elf_i386_info_to_howto | |
29 | PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *)); | |
30 | static void elf_i386_info_to_howto_rel | |
31 | PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *)); | |
32 | static boolean elf_i386_create_dynamic_sections | |
33 | PARAMS ((bfd *, struct bfd_link_info *)); | |
12662be4 ILT |
34 | static boolean elf_i386_create_got_section |
35 | PARAMS ((bfd *, struct bfd_link_info *)); | |
eb4267a3 ILT |
36 | static boolean elf_i386_check_relocs |
37 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
38 | const Elf_Internal_Rela *)); | |
013dec1a ILT |
39 | static boolean elf_i386_adjust_dynamic_symbol |
40 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); | |
013dec1a ILT |
41 | static boolean elf_i386_size_dynamic_sections |
42 | PARAMS ((bfd *, struct bfd_link_info *)); | |
43 | static boolean elf_i386_relocate_section | |
44 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, | |
eb4267a3 | 45 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); |
013dec1a ILT |
46 | static boolean elf_i386_finish_dynamic_symbol |
47 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, | |
48 | Elf_Internal_Sym *)); | |
49 | static boolean elf_i386_finish_dynamic_sections | |
50 | PARAMS ((bfd *, struct bfd_link_info *)); | |
51 | ||
e4b6b3e7 ILT |
52 | #define USE_REL 1 /* 386 uses REL relocations instead of RELA */ |
53 | ||
54 | enum reloc_type | |
55 | { | |
56 | R_386_NONE = 0, | |
68241b2b ILT |
57 | R_386_32, |
58 | R_386_PC32, | |
59 | R_386_GOT32, | |
60 | R_386_PLT32, | |
e4b6b3e7 | 61 | R_386_COPY, |
68241b2b ILT |
62 | R_386_GLOB_DAT, |
63 | R_386_JUMP_SLOT, | |
e4b6b3e7 | 64 | R_386_RELATIVE, |
68241b2b ILT |
65 | R_386_GOTOFF, |
66 | R_386_GOTPC, | |
e4b6b3e7 ILT |
67 | R_386_max |
68 | }; | |
69 | ||
70 | #if 0 | |
71 | static CONST char *CONST reloc_type_names[] = | |
72 | { | |
73 | "R_386_NONE", | |
68241b2b ILT |
74 | "R_386_32", |
75 | "R_386_PC32", | |
76 | "R_386_GOT32", | |
77 | "R_386_PLT32", | |
e4b6b3e7 | 78 | "R_386_COPY", |
68241b2b ILT |
79 | "R_386_GLOB_DAT", |
80 | "R_386_JUMP_SLOT", | |
e4b6b3e7 | 81 | "R_386_RELATIVE", |
68241b2b ILT |
82 | "R_386_GOTOFF", |
83 | "R_386_GOTPC", | |
e4b6b3e7 ILT |
84 | }; |
85 | #endif | |
86 | ||
e4b6b3e7 ILT |
87 | static reloc_howto_type elf_howto_table[]= |
88 | { | |
68241b2b ILT |
89 | HOWTO(R_386_NONE, 0,0, 0,false,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_NONE", true,0x00000000,0x00000000,false), |
90 | HOWTO(R_386_32, 0,2,32,false,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_32", true,0xffffffff,0xffffffff,false), | |
91 | HOWTO(R_386_PC32, 0,2,32,true, 0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_PC32", true,0xffffffff,0xffffffff,true), | |
92 | HOWTO(R_386_GOT32, 0,2,32,false,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_GOT32", true,0xffffffff,0xffffffff,false), | |
eb4267a3 | 93 | HOWTO(R_386_PLT32, 0,2,32,true,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_PLT32", true,0xffffffff,0xffffffff,true), |
68241b2b ILT |
94 | HOWTO(R_386_COPY, 0,2,32,false,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_COPY", true,0xffffffff,0xffffffff,false), |
95 | HOWTO(R_386_GLOB_DAT, 0,2,32,false,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_GLOB_DAT", true,0xffffffff,0xffffffff,false), | |
96 | HOWTO(R_386_JUMP_SLOT, 0,2,32,false,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_JUMP_SLOT",true,0xffffffff,0xffffffff,false), | |
97 | HOWTO(R_386_RELATIVE, 0,2,32,false,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_RELATIVE", true,0xffffffff,0xffffffff,false), | |
98 | HOWTO(R_386_GOTOFF, 0,2,32,false,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_GOTOFF", true,0xffffffff,0xffffffff,false), | |
eb4267a3 | 99 | HOWTO(R_386_GOTPC, 0,2,32,true,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_GOTPC", true,0xffffffff,0xffffffff,true), |
e4b6b3e7 ILT |
100 | }; |
101 | ||
102 | #ifdef DEBUG_GEN_RELOC | |
103 | #define TRACE(str) fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str) | |
104 | #else | |
105 | #define TRACE(str) | |
106 | #endif | |
107 | ||
30dc85f1 | 108 | static reloc_howto_type * |
013dec1a ILT |
109 | elf_i386_reloc_type_lookup (abfd, code) |
110 | bfd *abfd; | |
111 | bfd_reloc_code_real_type code; | |
e4b6b3e7 ILT |
112 | { |
113 | switch (code) | |
114 | { | |
115 | case BFD_RELOC_NONE: | |
116 | TRACE ("BFD_RELOC_NONE"); | |
117 | return &elf_howto_table[ (int)R_386_NONE ]; | |
118 | ||
119 | case BFD_RELOC_32: | |
120 | TRACE ("BFD_RELOC_32"); | |
121 | return &elf_howto_table[ (int)R_386_32 ]; | |
122 | ||
123 | case BFD_RELOC_32_PCREL: | |
124 | TRACE ("BFD_RELOC_PC32"); | |
125 | return &elf_howto_table[ (int)R_386_PC32 ]; | |
126 | ||
68241b2b ILT |
127 | case BFD_RELOC_386_GOT32: |
128 | TRACE ("BFD_RELOC_386_GOT32"); | |
129 | return &elf_howto_table[ (int)R_386_GOT32 ]; | |
130 | ||
131 | case BFD_RELOC_386_PLT32: | |
132 | TRACE ("BFD_RELOC_386_PLT32"); | |
133 | return &elf_howto_table[ (int)R_386_PLT32 ]; | |
134 | ||
135 | case BFD_RELOC_386_COPY: | |
136 | TRACE ("BFD_RELOC_386_COPY"); | |
137 | return &elf_howto_table[ (int)R_386_COPY ]; | |
138 | ||
139 | case BFD_RELOC_386_GLOB_DAT: | |
140 | TRACE ("BFD_RELOC_386_GLOB_DAT"); | |
141 | return &elf_howto_table[ (int)R_386_GLOB_DAT ]; | |
142 | ||
143 | case BFD_RELOC_386_JUMP_SLOT: | |
144 | TRACE ("BFD_RELOC_386_JUMP_SLOT"); | |
145 | return &elf_howto_table[ (int)R_386_JUMP_SLOT ]; | |
146 | ||
147 | case BFD_RELOC_386_RELATIVE: | |
148 | TRACE ("BFD_RELOC_386_RELATIVE"); | |
149 | return &elf_howto_table[ (int)R_386_RELATIVE ]; | |
150 | ||
151 | case BFD_RELOC_386_GOTOFF: | |
152 | TRACE ("BFD_RELOC_386_GOTOFF"); | |
153 | return &elf_howto_table[ (int)R_386_GOTOFF ]; | |
154 | ||
155 | case BFD_RELOC_386_GOTPC: | |
156 | TRACE ("BFD_RELOC_386_GOTPC"); | |
157 | return &elf_howto_table[ (int)R_386_GOTPC ]; | |
158 | ||
e4b6b3e7 | 159 | default: |
68241b2b | 160 | break; |
e4b6b3e7 ILT |
161 | } |
162 | ||
163 | TRACE ("Unknown"); | |
164 | return 0; | |
165 | } | |
166 | ||
167 | static void | |
013dec1a ILT |
168 | elf_i386_info_to_howto (abfd, cache_ptr, dst) |
169 | bfd *abfd; | |
170 | arelent *cache_ptr; | |
171 | Elf32_Internal_Rela *dst; | |
e4b6b3e7 | 172 | { |
68241b2b | 173 | BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_386_max); |
e4b6b3e7 ILT |
174 | |
175 | cache_ptr->howto = &elf_howto_table[ELF32_R_TYPE(dst->r_info)]; | |
176 | } | |
177 | ||
178 | static void | |
013dec1a ILT |
179 | elf_i386_info_to_howto_rel (abfd, cache_ptr, dst) |
180 | bfd *abfd; | |
181 | arelent *cache_ptr; | |
182 | Elf32_Internal_Rel *dst; | |
e4b6b3e7 | 183 | { |
68241b2b | 184 | BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_386_max); |
e4b6b3e7 ILT |
185 | |
186 | cache_ptr->howto = &elf_howto_table[ELF32_R_TYPE(dst->r_info)]; | |
187 | } | |
013dec1a ILT |
188 | \f |
189 | /* Functions for the i386 ELF linker. */ | |
190 | ||
191 | /* The name of the dynamic interpreter. This is put in the .interp | |
192 | section. */ | |
193 | ||
194 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" | |
195 | ||
196 | /* The size in bytes of an entry in the procedure linkage table. */ | |
197 | ||
198 | #define PLT_ENTRY_SIZE 16 | |
199 | ||
200 | /* The first entry in an absolute procedure linkage table looks like | |
201 | this. See the SVR4 ABI i386 supplement to see how this works. */ | |
202 | ||
89f7a04c | 203 | static const bfd_byte elf_i386_plt0_entry[PLT_ENTRY_SIZE] = |
013dec1a ILT |
204 | { |
205 | 0xff, 0x35, /* pushl contents of address */ | |
206 | 0, 0, 0, 0, /* replaced with address of .got + 4. */ | |
207 | 0xff, 0x25, /* jmp indirect */ | |
208 | 0, 0, 0, 0, /* replaced with address of .got + 8. */ | |
209 | 0, 0, 0, 0 /* pad out to 16 bytes. */ | |
210 | }; | |
211 | ||
212 | /* Subsequent entries in an absolute procedure linkage table look like | |
213 | this. */ | |
214 | ||
89f7a04c | 215 | static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] = |
013dec1a ILT |
216 | { |
217 | 0xff, 0x25, /* jmp indirect */ | |
218 | 0, 0, 0, 0, /* replaced with address of this symbol in .got. */ | |
219 | 0x68, /* pushl immediate */ | |
220 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
221 | 0xe9, /* jmp relative */ | |
222 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
223 | }; | |
224 | ||
eb4267a3 ILT |
225 | /* The first entry in a PIC procedure linkage table look like this. */ |
226 | ||
89f7a04c | 227 | static const bfd_byte elf_i386_pic_plt0_entry[PLT_ENTRY_SIZE] = |
eb4267a3 ILT |
228 | { |
229 | 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */ | |
230 | 0xff, 0xa3, 8, 0, 0, 0, /* jmp *8(%ebx) */ | |
231 | 0, 0, 0, 0 /* pad out to 16 bytes. */ | |
232 | }; | |
233 | ||
234 | /* Subsequent entries in a PIC procedure linkage table look like this. */ | |
235 | ||
89f7a04c | 236 | static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] = |
eb4267a3 ILT |
237 | { |
238 | 0xff, 0xa3, /* jmp *offset(%ebx) */ | |
239 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
240 | 0x68, /* pushl immediate */ | |
241 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
242 | 0xe9, /* jmp relative */ | |
243 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
244 | }; | |
245 | ||
013dec1a ILT |
246 | /* Create dynamic sections when linking against a dynamic object. */ |
247 | ||
248 | static boolean | |
249 | elf_i386_create_dynamic_sections (abfd, info) | |
250 | bfd *abfd; | |
251 | struct bfd_link_info *info; | |
252 | { | |
253 | flagword flags; | |
254 | register asection *s; | |
013dec1a | 255 | |
eb4267a3 ILT |
256 | /* We need to create .plt, .rel.plt, .got, .got.plt, .dynbss, and |
257 | .rel.bss sections. */ | |
013dec1a ILT |
258 | |
259 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY; | |
260 | ||
261 | s = bfd_make_section (abfd, ".plt"); | |
262 | if (s == NULL | |
263 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY | SEC_CODE) | |
264 | || ! bfd_set_section_alignment (abfd, s, 2)) | |
265 | return false; | |
266 | ||
267 | s = bfd_make_section (abfd, ".rel.plt"); | |
268 | if (s == NULL | |
269 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
270 | || ! bfd_set_section_alignment (abfd, s, 2)) | |
271 | return false; | |
272 | ||
12662be4 | 273 | if (! elf_i386_create_got_section (abfd, info)) |
eb4267a3 | 274 | return false; |
013dec1a | 275 | |
013dec1a ILT |
276 | /* The .dynbss section is a place to put symbols which are defined |
277 | by dynamic objects, are referenced by regular objects, and are | |
278 | not functions. We must allocate space for them in the process | |
279 | image and use a R_386_COPY reloc to tell the dynamic linker to | |
280 | initialize them at run time. The linker script puts the .dynbss | |
281 | section into the .bss section of the final image. */ | |
282 | s = bfd_make_section (abfd, ".dynbss"); | |
283 | if (s == NULL | |
284 | || ! bfd_set_section_flags (abfd, s, SEC_ALLOC)) | |
285 | return false; | |
286 | ||
287 | /* The .rel.bss section holds copy relocs. This section is not | |
288 | normally needed. We need to create it here, though, so that the | |
eb4267a3 ILT |
289 | linker will map it to an output section. We can't just create it |
290 | only if we need it, because we will not know whether we need it | |
291 | until we have seen all the input files, and the first time the | |
292 | main linker code calls BFD after examining all the input files | |
293 | (size_dynamic_sections) the input sections have already been | |
294 | mapped to the output sections. If the section turns out not to | |
295 | be needed, we can discard it later. We will never need this | |
296 | section when generating a shared object, since they do not use | |
297 | copy relocs. */ | |
298 | if (! info->shared) | |
299 | { | |
300 | s = bfd_make_section (abfd, ".rel.bss"); | |
301 | if (s == NULL | |
302 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
303 | || ! bfd_set_section_alignment (abfd, s, 2)) | |
304 | return false; | |
305 | } | |
306 | ||
307 | return true; | |
308 | } | |
309 | ||
12662be4 ILT |
310 | /* Create the .got section to hold the global offset table, and the |
311 | .got.plt section to hold procedure linkage table GOT entries. The | |
312 | linker script will put .got.plt into the output .got section. */ | |
313 | ||
314 | static boolean | |
315 | elf_i386_create_got_section (abfd, info) | |
316 | bfd *abfd; | |
317 | struct bfd_link_info *info; | |
318 | { | |
319 | flagword flags; | |
320 | register asection *s; | |
321 | struct elf_link_hash_entry *h; | |
322 | ||
323 | /* This function may be called more than once. */ | |
324 | if (bfd_get_section_by_name (abfd, ".got") != NULL) | |
325 | return true; | |
326 | ||
327 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY; | |
328 | ||
329 | s = bfd_make_section (abfd, ".got"); | |
330 | if (s == NULL | |
331 | || ! bfd_set_section_flags (abfd, s, flags) | |
332 | || ! bfd_set_section_alignment (abfd, s, 2)) | |
333 | return false; | |
334 | ||
335 | s = bfd_make_section (abfd, ".got.plt"); | |
336 | if (s == NULL | |
337 | || ! bfd_set_section_flags (abfd, s, flags) | |
338 | || ! bfd_set_section_alignment (abfd, s, 2)) | |
339 | return false; | |
340 | ||
341 | /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the | |
342 | .got.plt section, which will be placed at the start of the output | |
343 | .got section. We don't do this in the linker script because we | |
344 | don't want to define the symbol if we are not creating a global | |
345 | offset table. */ | |
346 | h = NULL; | |
347 | if (! (_bfd_generic_link_add_one_symbol | |
348 | (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL, s, (bfd_vma) 0, | |
349 | (const char *) NULL, false, get_elf_backend_data (abfd)->collect, | |
350 | (struct bfd_link_hash_entry **) &h))) | |
351 | return false; | |
352 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
353 | h->type = STT_OBJECT; | |
354 | ||
355 | if (info->shared | |
356 | && ! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
357 | return false; | |
358 | ||
359 | /* The first three global offset table entries are reserved. */ | |
360 | s->_raw_size += 3 * 4; | |
361 | ||
362 | return true; | |
363 | } | |
364 | ||
eb4267a3 ILT |
365 | /* Look through the relocs for a section during the first phase, and |
366 | allocate space in the global offset table or procedure linkage | |
367 | table. */ | |
368 | ||
369 | static boolean | |
370 | elf_i386_check_relocs (abfd, info, sec, relocs) | |
371 | bfd *abfd; | |
372 | struct bfd_link_info *info; | |
373 | asection *sec; | |
374 | const Elf_Internal_Rela *relocs; | |
375 | { | |
376 | bfd *dynobj; | |
377 | Elf_Internal_Shdr *symtab_hdr; | |
378 | struct elf_link_hash_entry **sym_hashes; | |
379 | bfd_vma *local_got_offsets; | |
380 | const Elf_Internal_Rela *rel; | |
381 | const Elf_Internal_Rela *rel_end; | |
382 | asection *sgot; | |
383 | asection *srelgot; | |
eb4267a3 ILT |
384 | asection *sreloc; |
385 | ||
386 | if (info->relocateable) | |
387 | return true; | |
388 | ||
389 | dynobj = elf_hash_table (info)->dynobj; | |
390 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
391 | sym_hashes = elf_sym_hashes (abfd); | |
392 | local_got_offsets = elf_local_got_offsets (abfd); | |
393 | ||
394 | sgot = NULL; | |
395 | srelgot = NULL; | |
eb4267a3 ILT |
396 | sreloc = NULL; |
397 | ||
398 | rel_end = relocs + sec->reloc_count; | |
399 | for (rel = relocs; rel < rel_end; rel++) | |
400 | { | |
401 | long r_symndx; | |
402 | struct elf_link_hash_entry *h; | |
403 | ||
404 | r_symndx = ELF32_R_SYM (rel->r_info); | |
405 | ||
406 | if (r_symndx < symtab_hdr->sh_info) | |
407 | h = NULL; | |
408 | else | |
409 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
410 | ||
12662be4 | 411 | /* Some relocs require a global offset table. */ |
eb4267a3 ILT |
412 | if (dynobj == NULL) |
413 | { | |
414 | switch (ELF32_R_TYPE (rel->r_info)) | |
415 | { | |
416 | case R_386_GOT32: | |
eb4267a3 ILT |
417 | case R_386_GOTOFF: |
418 | case R_386_GOTPC: | |
419 | elf_hash_table (info)->dynobj = dynobj = abfd; | |
12662be4 | 420 | if (! elf_i386_create_got_section (dynobj, info)) |
eb4267a3 ILT |
421 | return false; |
422 | break; | |
423 | ||
424 | default: | |
425 | break; | |
426 | } | |
427 | } | |
428 | ||
429 | switch (ELF32_R_TYPE (rel->r_info)) | |
430 | { | |
431 | case R_386_GOT32: | |
432 | /* This symbol requires a global offset table entry. */ | |
433 | ||
434 | if (sgot == NULL) | |
435 | { | |
436 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
12662be4 ILT |
437 | BFD_ASSERT (sgot != NULL); |
438 | } | |
439 | ||
440 | if (srelgot == NULL | |
441 | && (h != NULL || info->shared)) | |
442 | { | |
eb4267a3 ILT |
443 | srelgot = bfd_get_section_by_name (dynobj, ".rel.got"); |
444 | if (srelgot == NULL) | |
445 | { | |
446 | srelgot = bfd_make_section (dynobj, ".rel.got"); | |
447 | if (srelgot == NULL | |
448 | || ! bfd_set_section_flags (dynobj, srelgot, | |
449 | (SEC_ALLOC | |
450 | | SEC_LOAD | |
451 | | SEC_HAS_CONTENTS | |
452 | | SEC_IN_MEMORY | |
453 | | SEC_READONLY)) | |
454 | || ! bfd_set_section_alignment (dynobj, srelgot, 2)) | |
455 | return false; | |
456 | } | |
eb4267a3 ILT |
457 | } |
458 | ||
459 | if (h != NULL) | |
460 | { | |
461 | if (h->got_offset != (bfd_vma) -1) | |
462 | { | |
463 | /* We have already allocated space in the .got. */ | |
464 | break; | |
465 | } | |
466 | h->got_offset = sgot->_raw_size; | |
467 | ||
468 | /* Make sure this symbol is output as a dynamic symbol. */ | |
469 | if (h->dynindx == -1) | |
470 | { | |
471 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
472 | return false; | |
473 | } | |
12662be4 ILT |
474 | |
475 | srelgot->_raw_size += sizeof (Elf32_External_Rel); | |
eb4267a3 ILT |
476 | } |
477 | else | |
478 | { | |
479 | /* This is a global offset table entry for a local | |
480 | symbol. */ | |
481 | if (local_got_offsets == NULL) | |
482 | { | |
483 | size_t size; | |
484 | register int i; | |
485 | ||
486 | size = symtab_hdr->sh_info * sizeof (bfd_vma); | |
487 | local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size); | |
488 | if (local_got_offsets == NULL) | |
489 | { | |
490 | bfd_set_error (bfd_error_no_memory); | |
491 | return false; | |
492 | } | |
493 | elf_local_got_offsets (abfd) = local_got_offsets; | |
494 | for (i = 0; i < symtab_hdr->sh_info; i++) | |
495 | local_got_offsets[i] = (bfd_vma) -1; | |
496 | } | |
497 | if (local_got_offsets[r_symndx] != (bfd_vma) -1) | |
498 | { | |
499 | /* We have already allocated space in the .got. */ | |
500 | break; | |
501 | } | |
502 | local_got_offsets[r_symndx] = sgot->_raw_size; | |
12662be4 ILT |
503 | |
504 | if (info->shared) | |
505 | { | |
506 | /* If we are generating a shared object, we need to | |
507 | output a R_386_RELATIVE reloc so that the dynamic | |
508 | linker can adjust this GOT entry. */ | |
509 | srelgot->_raw_size += sizeof (Elf32_External_Rel); | |
510 | } | |
eb4267a3 ILT |
511 | } |
512 | ||
513 | sgot->_raw_size += 4; | |
eb4267a3 ILT |
514 | |
515 | break; | |
516 | ||
517 | case R_386_PLT32: | |
12662be4 ILT |
518 | /* This symbol requires a procedure linkage table entry. We |
519 | actually build the entry in adjust_dynamic_symbol, | |
520 | because this might be a case of linking PIC code without | |
521 | linking in any dynamic objects, in which case we don't | |
522 | need to generate a procedure linkage table after all. */ | |
eb4267a3 ILT |
523 | |
524 | /* If this is a local symbol, we resolve it directly without | |
525 | creating a procedure linkage table entry. */ | |
526 | if (h == NULL) | |
527 | continue; | |
528 | ||
eb4267a3 ILT |
529 | /* Make sure this symbol is output as a dynamic symbol. */ |
530 | if (h->dynindx == -1) | |
531 | { | |
532 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
533 | return false; | |
534 | } | |
535 | ||
12662be4 | 536 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
eb4267a3 ILT |
537 | |
538 | break; | |
539 | ||
540 | case R_386_32: | |
541 | case R_386_PC32: | |
542 | if (info->shared | |
543 | && (sec->flags & SEC_ALLOC) != 0) | |
544 | { | |
14cac507 ILT |
545 | /* When creating a shared object, we must copy these |
546 | reloc types into the output file. We create a reloc | |
547 | section in dynobj and make room for this reloc. */ | |
eb4267a3 ILT |
548 | if (sreloc == NULL) |
549 | { | |
550 | const char *name; | |
551 | ||
552 | name = (elf_string_from_elf_section | |
553 | (abfd, | |
554 | elf_elfheader (abfd)->e_shstrndx, | |
555 | elf_section_data (sec)->rel_hdr.sh_name)); | |
556 | if (name == NULL) | |
557 | return false; | |
558 | ||
559 | BFD_ASSERT (strncmp (name, ".rel", 4) == 0 | |
560 | && strcmp (bfd_get_section_name (abfd, sec), | |
561 | name + 4) == 0); | |
562 | ||
563 | sreloc = bfd_get_section_by_name (dynobj, name); | |
564 | if (sreloc == NULL) | |
565 | { | |
566 | sreloc = bfd_make_section (dynobj, name); | |
567 | if (sreloc == NULL | |
568 | || ! bfd_set_section_flags (dynobj, sreloc, | |
569 | (SEC_ALLOC | |
570 | | SEC_LOAD | |
571 | | SEC_HAS_CONTENTS | |
572 | | SEC_IN_MEMORY | |
573 | | SEC_READONLY)) | |
574 | || ! bfd_set_section_alignment (dynobj, sreloc, 2)) | |
575 | return false; | |
576 | } | |
577 | } | |
578 | ||
579 | sreloc->_raw_size += sizeof (Elf32_External_Rel); | |
580 | } | |
581 | ||
582 | break; | |
583 | ||
584 | default: | |
585 | break; | |
586 | } | |
587 | } | |
013dec1a ILT |
588 | |
589 | return true; | |
590 | } | |
591 | ||
592 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
593 | regular object. The current definition is in some section of the | |
594 | dynamic object, but we're not including those sections. We have to | |
595 | change the definition to something the rest of the link can | |
596 | understand. */ | |
597 | ||
598 | static boolean | |
599 | elf_i386_adjust_dynamic_symbol (info, h) | |
600 | struct bfd_link_info *info; | |
601 | struct elf_link_hash_entry *h; | |
602 | { | |
603 | bfd *dynobj; | |
604 | asection *s; | |
605 | unsigned int power_of_two; | |
013dec1a ILT |
606 | |
607 | dynobj = elf_hash_table (info)->dynobj; | |
608 | ||
609 | /* Make sure we know what is going on here. */ | |
3004a68c ILT |
610 | BFD_ASSERT (dynobj != NULL |
611 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) | |
612 | || ((h->elf_link_hash_flags | |
613 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
614 | && (h->elf_link_hash_flags | |
615 | & ELF_LINK_HASH_REF_REGULAR) != 0 | |
616 | && (h->elf_link_hash_flags | |
617 | & ELF_LINK_HASH_DEF_REGULAR) == 0))); | |
013dec1a ILT |
618 | |
619 | /* If this is a function, put it in the procedure linkage table. We | |
620 | will fill in the contents of the procedure linkage table later, | |
621 | when we know the address of the .got section. */ | |
12662be4 ILT |
622 | if (h->type == STT_FUNC |
623 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) | |
013dec1a | 624 | { |
12662be4 ILT |
625 | if (! elf_hash_table (info)->dynamic_sections_created) |
626 | { | |
627 | /* This case can occur if we saw a PLT32 reloc in an input | |
628 | file, but none of the input files were dynamic objects. | |
629 | In such a case, we don't actually need to build a | |
630 | procedure linkage table, and we can just do a PC32 reloc | |
631 | instead. */ | |
632 | BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0); | |
633 | return true; | |
634 | } | |
635 | ||
013dec1a ILT |
636 | s = bfd_get_section_by_name (dynobj, ".plt"); |
637 | BFD_ASSERT (s != NULL); | |
638 | ||
12662be4 ILT |
639 | /* If this is the first .plt entry, make room for the special |
640 | first entry. */ | |
641 | if (s->_raw_size == 0) | |
642 | s->_raw_size += PLT_ENTRY_SIZE; | |
013dec1a | 643 | |
9b09a015 ILT |
644 | /* If this symbol is not defined in a regular file, and we are |
645 | not generating a shared library, then set the symbol to this | |
646 | location in the .plt. This is required to make function | |
647 | pointers compare as equal between the normal executable and | |
648 | the shared library. */ | |
649 | if (! info->shared | |
650 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
14cac507 ILT |
651 | { |
652 | h->root.u.def.section = s; | |
653 | h->root.u.def.value = s->_raw_size; | |
654 | } | |
013dec1a | 655 | |
12662be4 | 656 | h->plt_offset = s->_raw_size; |
013dec1a | 657 | |
12662be4 ILT |
658 | /* Make room for this entry. */ |
659 | s->_raw_size += PLT_ENTRY_SIZE; | |
013dec1a | 660 | |
12662be4 ILT |
661 | /* We also need to make an entry in the .got.plt section, which |
662 | will be placed in the .got section by the linker script. */ | |
013dec1a | 663 | |
12662be4 ILT |
664 | s = bfd_get_section_by_name (dynobj, ".got.plt"); |
665 | BFD_ASSERT (s != NULL); | |
666 | s->_raw_size += 4; | |
013dec1a | 667 | |
12662be4 | 668 | /* We also need to make an entry in the .rel.plt section. */ |
eb4267a3 | 669 | |
12662be4 ILT |
670 | s = bfd_get_section_by_name (dynobj, ".rel.plt"); |
671 | BFD_ASSERT (s != NULL); | |
672 | s->_raw_size += sizeof (Elf32_External_Rel); | |
013dec1a ILT |
673 | |
674 | return true; | |
675 | } | |
676 | ||
677 | /* If this is a weak symbol, and there is a real definition, the | |
678 | processor independent code will have arranged for us to see the | |
679 | real definition first, and we can just use the same value. */ | |
680 | if (h->weakdef != NULL) | |
681 | { | |
30dc85f1 ILT |
682 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined |
683 | || h->weakdef->root.type == bfd_link_hash_defweak); | |
013dec1a ILT |
684 | h->root.u.def.section = h->weakdef->root.u.def.section; |
685 | h->root.u.def.value = h->weakdef->root.u.def.value; | |
013dec1a ILT |
686 | return true; |
687 | } | |
688 | ||
689 | /* This is a reference to a symbol defined by a dynamic object which | |
eb4267a3 ILT |
690 | is not a function. */ |
691 | ||
692 | /* If we are creating a shared library, we must presume that the | |
693 | only references to the symbol are via the global offset table. | |
694 | For such cases we need not do anything here; the relocations will | |
695 | be handled correctly by relocate_section. */ | |
696 | if (info->shared) | |
697 | return true; | |
698 | ||
699 | /* We must allocate the symbol in our .dynbss section, which will | |
700 | become part of the .bss section of the executable. There will be | |
701 | an entry for this symbol in the .dynsym section. The dynamic | |
702 | object will contain position independent code, so all references | |
703 | from the dynamic object to this symbol will go through the global | |
704 | offset table. The dynamic linker will use the .dynsym entry to | |
705 | determine the address it must put in the global offset table, so | |
706 | both the dynamic object and the regular object will refer to the | |
707 | same memory location for the variable. */ | |
013dec1a ILT |
708 | |
709 | s = bfd_get_section_by_name (dynobj, ".dynbss"); | |
710 | BFD_ASSERT (s != NULL); | |
711 | ||
712 | /* If the symbol is currently defined in the .bss section of the | |
713 | dynamic object, then it is OK to simply initialize it to zero. | |
714 | If the symbol is in some other section, we must generate a | |
715 | R_386_COPY reloc to tell the dynamic linker to copy the initial | |
716 | value out of the dynamic object and into the runtime process | |
717 | image. We need to remember the offset into the .rel.bss section | |
7c6da9ca | 718 | we are going to use. */ |
eb4267a3 | 719 | if ((h->root.u.def.section->flags & SEC_LOAD) != 0) |
013dec1a ILT |
720 | { |
721 | asection *srel; | |
722 | ||
723 | srel = bfd_get_section_by_name (dynobj, ".rel.bss"); | |
724 | BFD_ASSERT (srel != NULL); | |
013dec1a | 725 | srel->_raw_size += sizeof (Elf32_External_Rel); |
eb4267a3 | 726 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; |
013dec1a ILT |
727 | } |
728 | ||
729 | /* We need to figure out the alignment required for this symbol. I | |
730 | have no idea how ELF linkers handle this. */ | |
7c6da9ca ILT |
731 | power_of_two = bfd_log2 (h->size); |
732 | if (power_of_two > 3) | |
733 | power_of_two = 3; | |
013dec1a ILT |
734 | |
735 | /* Apply the required alignment. */ | |
7c6da9ca ILT |
736 | s->_raw_size = BFD_ALIGN (s->_raw_size, |
737 | (bfd_size_type) (1 << power_of_two)); | |
013dec1a ILT |
738 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) |
739 | { | |
740 | if (! bfd_set_section_alignment (dynobj, s, power_of_two)) | |
741 | return false; | |
742 | } | |
743 | ||
744 | /* Define the symbol as being at this point in the section. */ | |
745 | h->root.u.def.section = s; | |
746 | h->root.u.def.value = s->_raw_size; | |
747 | ||
748 | /* Increment the section size to make room for the symbol. */ | |
749 | s->_raw_size += h->size; | |
750 | ||
751 | return true; | |
752 | } | |
753 | ||
013dec1a ILT |
754 | /* Set the sizes of the dynamic sections. */ |
755 | ||
756 | static boolean | |
757 | elf_i386_size_dynamic_sections (output_bfd, info) | |
758 | bfd *output_bfd; | |
759 | struct bfd_link_info *info; | |
760 | { | |
761 | bfd *dynobj; | |
762 | asection *s; | |
eb4267a3 ILT |
763 | boolean plt; |
764 | boolean relocs; | |
765 | boolean reltext; | |
013dec1a ILT |
766 | |
767 | dynobj = elf_hash_table (info)->dynobj; | |
768 | BFD_ASSERT (dynobj != NULL); | |
769 | ||
12662be4 | 770 | if (elf_hash_table (info)->dynamic_sections_created) |
8af74670 | 771 | { |
12662be4 ILT |
772 | /* Set the contents of the .interp section to the interpreter. */ |
773 | if (! info->shared) | |
774 | { | |
775 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
776 | BFD_ASSERT (s != NULL); | |
777 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; | |
778 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
779 | } | |
780 | } | |
781 | else | |
782 | { | |
783 | /* We may have created entries in the .rel.got section. | |
784 | However, if we are not creating the dynamic sections, we will | |
785 | not actually use these entries. Reset the size of .rel.got, | |
786 | which will cause it to get stripped from the output file | |
787 | below. */ | |
788 | s = bfd_get_section_by_name (dynobj, ".rel.got"); | |
789 | if (s != NULL) | |
790 | s->_raw_size = 0; | |
8af74670 | 791 | } |
013dec1a | 792 | |
eb4267a3 ILT |
793 | /* The check_relocs and adjust_dynamic_symbol entry points have |
794 | determined the sizes of the various dynamic sections. Allocate | |
795 | memory for them. */ | |
796 | plt = false; | |
797 | relocs = false; | |
798 | reltext = false; | |
799 | for (s = dynobj->sections; s != NULL; s = s->next) | |
800 | { | |
801 | const char *name; | |
802 | boolean strip; | |
803 | ||
804 | if ((s->flags & SEC_IN_MEMORY) == 0) | |
805 | continue; | |
806 | ||
807 | /* It's OK to base decisions on the section name, because none | |
808 | of the dynobj section names depend upon the input files. */ | |
809 | name = bfd_get_section_name (dynobj, s); | |
810 | ||
811 | strip = false; | |
812 | ||
813 | if (strcmp (name, ".plt") == 0) | |
814 | { | |
815 | if (s->_raw_size == 0) | |
816 | { | |
817 | /* Strip this section if we don't need it; see the | |
818 | comment below. */ | |
819 | strip = true; | |
820 | } | |
821 | else | |
822 | { | |
823 | /* Remember whether there is a PLT. */ | |
824 | plt = true; | |
825 | } | |
826 | } | |
827 | else if (strncmp (name, ".rel", 4) == 0) | |
828 | { | |
829 | if (s->_raw_size == 0) | |
830 | { | |
831 | /* If we don't need this section, strip it from the | |
832 | output file. This is mostly to handle .rel.bss and | |
833 | .rel.plt. We must create both sections in | |
834 | create_dynamic_sections, because they must be created | |
835 | before the linker maps input sections to output | |
836 | sections. The linker does that before | |
837 | adjust_dynamic_symbol is called, and it is that | |
838 | function which decides whether anything needs to go | |
839 | into these sections. */ | |
840 | strip = true; | |
841 | } | |
842 | else | |
843 | { | |
844 | asection *target; | |
845 | ||
846 | /* Remember whether there are any reloc sections other | |
847 | than .rel.plt. */ | |
848 | if (strcmp (name, ".rel.plt") != 0) | |
849 | relocs = true; | |
850 | ||
851 | /* If this relocation section applies to a read only | |
852 | section, then we probably need a DT_TEXTREL entry. */ | |
853 | target = bfd_get_section_by_name (output_bfd, name + 4); | |
854 | if (target != NULL | |
855 | && (target->flags & SEC_READONLY) != 0) | |
856 | reltext = true; | |
857 | ||
858 | /* We use the reloc_count field as a counter if we need | |
859 | to copy relocs into the output file. */ | |
860 | s->reloc_count = 0; | |
861 | } | |
862 | } | |
863 | else if (strncmp (name, ".got", 4) != 0) | |
864 | { | |
865 | /* It's not one of our sections, so don't allocate space. */ | |
866 | continue; | |
867 | } | |
868 | ||
869 | if (strip) | |
870 | { | |
871 | asection **spp; | |
872 | ||
873 | for (spp = &s->output_section->owner->sections; | |
874 | *spp != s->output_section; | |
875 | spp = &(*spp)->next) | |
876 | ; | |
877 | *spp = s->output_section->next; | |
878 | --s->output_section->owner->section_count; | |
879 | ||
880 | continue; | |
881 | } | |
013dec1a | 882 | |
eb4267a3 ILT |
883 | /* Allocate memory for the section contents. */ |
884 | s->contents = (bfd_byte *) bfd_alloc (dynobj, s->_raw_size); | |
885 | if (s->contents == NULL && s->_raw_size != 0) | |
886 | { | |
887 | bfd_set_error (bfd_error_no_memory); | |
888 | return false; | |
889 | } | |
890 | } | |
891 | ||
12662be4 | 892 | if (elf_hash_table (info)->dynamic_sections_created) |
eb4267a3 | 893 | { |
12662be4 ILT |
894 | /* Add some entries to the .dynamic section. We fill in the |
895 | values later, in elf_i386_finish_dynamic_sections, but we | |
896 | must add the entries now so that we get the correct size for | |
897 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
898 | dynamic linker and used by the debugger. */ | |
899 | if (! info->shared) | |
900 | { | |
901 | if (! bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0)) | |
902 | return false; | |
903 | } | |
013dec1a | 904 | |
12662be4 ILT |
905 | if (plt) |
906 | { | |
907 | if (! bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0) | |
908 | || ! bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0) | |
909 | || ! bfd_elf32_add_dynamic_entry (info, DT_PLTREL, DT_REL) | |
910 | || ! bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 0)) | |
911 | return false; | |
912 | } | |
013dec1a | 913 | |
12662be4 ILT |
914 | if (relocs) |
915 | { | |
916 | if (! bfd_elf32_add_dynamic_entry (info, DT_REL, 0) | |
917 | || ! bfd_elf32_add_dynamic_entry (info, DT_RELSZ, 0) | |
918 | || ! bfd_elf32_add_dynamic_entry (info, DT_RELENT, | |
919 | sizeof (Elf32_External_Rel))) | |
920 | return false; | |
921 | } | |
013dec1a | 922 | |
12662be4 ILT |
923 | if (reltext) |
924 | { | |
925 | if (! bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0)) | |
926 | return false; | |
927 | } | |
eb4267a3 ILT |
928 | } |
929 | ||
013dec1a ILT |
930 | return true; |
931 | } | |
932 | ||
933 | /* Relocate an i386 ELF section. */ | |
934 | ||
935 | static boolean | |
936 | elf_i386_relocate_section (output_bfd, info, input_bfd, input_section, | |
eb4267a3 | 937 | contents, relocs, local_syms, local_sections) |
013dec1a ILT |
938 | bfd *output_bfd; |
939 | struct bfd_link_info *info; | |
940 | bfd *input_bfd; | |
941 | asection *input_section; | |
942 | bfd_byte *contents; | |
943 | Elf_Internal_Rela *relocs; | |
944 | Elf_Internal_Sym *local_syms; | |
945 | asection **local_sections; | |
946 | { | |
eb4267a3 | 947 | bfd *dynobj; |
013dec1a | 948 | Elf_Internal_Shdr *symtab_hdr; |
eb4267a3 ILT |
949 | struct elf_link_hash_entry **sym_hashes; |
950 | bfd_vma *local_got_offsets; | |
951 | asection *sgot; | |
952 | asection *splt; | |
953 | asection *sreloc; | |
013dec1a ILT |
954 | Elf_Internal_Rela *rel; |
955 | Elf_Internal_Rela *relend; | |
956 | ||
eb4267a3 | 957 | dynobj = elf_hash_table (info)->dynobj; |
013dec1a | 958 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
eb4267a3 ILT |
959 | sym_hashes = elf_sym_hashes (input_bfd); |
960 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
961 | ||
962 | sgot = NULL; | |
963 | splt = NULL; | |
964 | sreloc = NULL; | |
013dec1a ILT |
965 | |
966 | rel = relocs; | |
967 | relend = relocs + input_section->reloc_count; | |
968 | for (; rel < relend; rel++) | |
969 | { | |
970 | int r_type; | |
82b1edf7 | 971 | reloc_howto_type *howto; |
013dec1a ILT |
972 | long r_symndx; |
973 | struct elf_link_hash_entry *h; | |
974 | Elf_Internal_Sym *sym; | |
975 | asection *sec; | |
976 | bfd_vma relocation; | |
977 | bfd_reloc_status_type r; | |
30dc85f1 | 978 | char *shared_name; |
013dec1a ILT |
979 | |
980 | r_type = ELF32_R_TYPE (rel->r_info); | |
981 | if (r_type < 0 || r_type >= (int) R_386_max) | |
982 | { | |
983 | bfd_set_error (bfd_error_bad_value); | |
984 | return false; | |
985 | } | |
986 | howto = elf_howto_table + r_type; | |
987 | ||
988 | r_symndx = ELF32_R_SYM (rel->r_info); | |
989 | ||
990 | if (info->relocateable) | |
991 | { | |
992 | /* This is a relocateable link. We don't have to change | |
993 | anything, unless the reloc is against a section symbol, | |
994 | in which case we have to adjust according to where the | |
995 | section symbol winds up in the output section. */ | |
996 | if (r_symndx < symtab_hdr->sh_info) | |
997 | { | |
998 | sym = local_syms + r_symndx; | |
999 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1000 | { | |
1001 | bfd_vma val; | |
1002 | ||
1003 | sec = local_sections[r_symndx]; | |
1004 | val = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
1005 | val += sec->output_offset + sym->st_value; | |
1006 | bfd_put_32 (input_bfd, val, contents + rel->r_offset); | |
1007 | } | |
1008 | } | |
1009 | ||
1010 | continue; | |
1011 | } | |
1012 | ||
1013 | /* This is a final link. */ | |
1014 | h = NULL; | |
1015 | sym = NULL; | |
1016 | sec = NULL; | |
30dc85f1 ILT |
1017 | shared_name = NULL; |
1018 | ||
013dec1a ILT |
1019 | if (r_symndx < symtab_hdr->sh_info) |
1020 | { | |
1021 | sym = local_syms + r_symndx; | |
1022 | sec = local_sections[r_symndx]; | |
1023 | relocation = (sec->output_section->vma | |
1024 | + sec->output_offset | |
1025 | + sym->st_value); | |
1026 | } | |
1027 | else | |
1028 | { | |
eb4267a3 | 1029 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
30dc85f1 ILT |
1030 | if (h->root.type == bfd_link_hash_defined |
1031 | || h->root.type == bfd_link_hash_defweak) | |
013dec1a ILT |
1032 | { |
1033 | sec = h->root.u.def.section; | |
9b09a015 ILT |
1034 | if (r_type == R_386_GOTPC |
1035 | || (r_type == R_386_PLT32 | |
1036 | && h->plt_offset != (bfd_vma) -1) | |
1037 | || (r_type == R_386_GOT32 | |
1038 | && elf_hash_table (info)->dynamic_sections_created) | |
1039 | || (info->shared | |
1040 | && (r_type == R_386_32 | |
1041 | || r_type == R_386_PC32) | |
1042 | && (input_section->flags & SEC_ALLOC) != 0)) | |
1043 | { | |
1044 | /* In these cases, we don't need the relocation | |
1045 | value. We check specially because in some | |
1046 | obscure cases sec->output_section will be NULL. */ | |
1047 | relocation = 0; | |
1048 | } | |
1049 | else | |
1050 | relocation = (h->root.u.def.value | |
1051 | + sec->output_section->vma | |
1052 | + sec->output_offset); | |
013dec1a | 1053 | } |
30dc85f1 | 1054 | else if (h->root.type == bfd_link_hash_undefweak) |
013dec1a | 1055 | relocation = 0; |
eb4267a3 ILT |
1056 | else if (info->shared) |
1057 | relocation = 0; | |
013dec1a ILT |
1058 | else |
1059 | { | |
1060 | if (! ((*info->callbacks->undefined_symbol) | |
1061 | (info, h->root.root.string, input_bfd, | |
1062 | input_section, rel->r_offset))) | |
1063 | return false; | |
1064 | relocation = 0; | |
1065 | } | |
1066 | } | |
1067 | ||
eb4267a3 ILT |
1068 | switch (r_type) |
1069 | { | |
1070 | case R_386_GOT32: | |
1071 | /* Relocation is to the entry for this symbol in the global | |
1072 | offset table. */ | |
1073 | if (sgot == NULL) | |
1074 | { | |
1075 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1076 | BFD_ASSERT (sgot != NULL); | |
1077 | } | |
1078 | ||
1079 | if (h != NULL) | |
1080 | { | |
12662be4 ILT |
1081 | bfd_vma off; |
1082 | ||
1083 | off = h->got_offset; | |
1084 | BFD_ASSERT (off != (bfd_vma) -1); | |
1085 | ||
1086 | if (! elf_hash_table (info)->dynamic_sections_created) | |
1087 | { | |
1088 | /* This is actually a static link. We must | |
1089 | initialize this entry in the global offset table. | |
1090 | Since the offset must always be a multiple of 4, | |
1091 | we use the least significant bit to record | |
1092 | whether we have initialized it already. | |
1093 | ||
1094 | When doing a dynamic link, we create a .rel.got | |
1095 | relocation entry to initialize the value. This | |
1096 | is done in the finish_dynamic_symbol routine. */ | |
1097 | if ((off & 1) != 0) | |
1098 | off &= ~1; | |
1099 | else | |
1100 | { | |
1101 | bfd_put_32 (output_bfd, relocation, | |
1102 | sgot->contents + off); | |
1103 | h->got_offset |= 1; | |
1104 | } | |
1105 | } | |
1106 | ||
1107 | relocation = sgot->output_offset + off; | |
eb4267a3 ILT |
1108 | } |
1109 | else | |
1110 | { | |
1111 | bfd_vma off; | |
1112 | ||
1113 | BFD_ASSERT (local_got_offsets != NULL | |
1114 | && local_got_offsets[r_symndx] != (bfd_vma) -1); | |
1115 | ||
1116 | off = local_got_offsets[r_symndx]; | |
1117 | ||
1118 | /* The offset must always be a multiple of 4. We use | |
1119 | the least significant bit to record whether we have | |
1120 | already generated the necessary reloc. */ | |
1121 | if ((off & 1) != 0) | |
1122 | off &= ~1; | |
1123 | else | |
1124 | { | |
eb4267a3 ILT |
1125 | bfd_put_32 (output_bfd, relocation, sgot->contents + off); |
1126 | ||
12662be4 ILT |
1127 | if (info->shared) |
1128 | { | |
1129 | asection *srelgot; | |
1130 | Elf_Internal_Rel outrel; | |
1131 | ||
1132 | srelgot = bfd_get_section_by_name (dynobj, ".rel.got"); | |
1133 | BFD_ASSERT (srelgot != NULL); | |
1134 | ||
1135 | outrel.r_offset = (sgot->output_section->vma | |
1136 | + sgot->output_offset | |
1137 | + off); | |
1138 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
1139 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, | |
1140 | (((Elf32_External_Rel *) | |
1141 | srelgot->contents) | |
1142 | + srelgot->reloc_count)); | |
1143 | ++srelgot->reloc_count; | |
1144 | } | |
eb4267a3 ILT |
1145 | |
1146 | local_got_offsets[r_symndx] |= 1; | |
1147 | } | |
1148 | ||
1149 | relocation = sgot->output_offset + off; | |
1150 | } | |
1151 | ||
1152 | break; | |
1153 | ||
1154 | case R_386_GOTOFF: | |
1155 | /* Relocation is relative to the start of the global offset | |
1156 | table. */ | |
1157 | ||
1158 | if (sgot == NULL) | |
1159 | { | |
1160 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1161 | BFD_ASSERT (sgot != NULL); | |
1162 | } | |
1163 | ||
1164 | /* Note that sgot->output_offset is not involved in this | |
1165 | calculation. We always want the start of .got. If we | |
1166 | defined _GLOBAL_OFFSET_TABLE in a different way, as is | |
1167 | permitted by the ABI, we might have to change this | |
1168 | calculation. */ | |
1169 | relocation -= sgot->output_section->vma; | |
1170 | ||
1171 | break; | |
1172 | ||
1173 | case R_386_GOTPC: | |
1174 | /* Use global offset table as symbol value. */ | |
1175 | ||
1176 | if (sgot == NULL) | |
1177 | { | |
1178 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1179 | BFD_ASSERT (sgot != NULL); | |
1180 | } | |
1181 | ||
1182 | relocation = sgot->output_section->vma; | |
1183 | ||
1184 | break; | |
1185 | ||
1186 | case R_386_PLT32: | |
1187 | /* Relocation is to the entry for this symbol in the | |
1188 | procedure linkage table. */ | |
1189 | ||
1190 | /* Resolve a PLT32 reloc again a local symbol directly, | |
1191 | without using the procedure linkage table. */ | |
1192 | if (h == NULL) | |
1193 | break; | |
1194 | ||
12662be4 ILT |
1195 | if (h->plt_offset == (bfd_vma) -1) |
1196 | { | |
1197 | /* We didn't make a PLT entry for this symbol. This | |
1198 | happens when statically linking PIC code. */ | |
1199 | break; | |
1200 | } | |
1201 | ||
eb4267a3 ILT |
1202 | if (splt == NULL) |
1203 | { | |
1204 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1205 | BFD_ASSERT (splt != NULL); | |
1206 | } | |
1207 | ||
eb4267a3 ILT |
1208 | relocation = (splt->output_section->vma |
1209 | + splt->output_offset | |
1210 | + h->plt_offset); | |
1211 | ||
1212 | break; | |
1213 | ||
1214 | case R_386_32: | |
1215 | case R_386_PC32: | |
1216 | if (info->shared | |
1217 | && (input_section->flags & SEC_ALLOC) != 0) | |
1218 | { | |
1219 | Elf_Internal_Rel outrel; | |
1220 | ||
1221 | /* When generating a shared object, these relocations | |
1222 | are copied into the output file to be resolved at run | |
1223 | time. */ | |
1224 | ||
1225 | if (sreloc == NULL) | |
1226 | { | |
30dc85f1 | 1227 | shared_name = (elf_string_from_elf_section |
eb4267a3 ILT |
1228 | (input_bfd, |
1229 | elf_elfheader (input_bfd)->e_shstrndx, | |
1230 | elf_section_data (input_section)->rel_hdr.sh_name)); | |
30dc85f1 | 1231 | if (shared_name == NULL) |
eb4267a3 ILT |
1232 | return false; |
1233 | ||
30dc85f1 | 1234 | BFD_ASSERT (strncmp (shared_name, ".rel", 4) == 0 |
eb4267a3 ILT |
1235 | && strcmp (bfd_get_section_name (input_bfd, |
1236 | input_section), | |
30dc85f1 | 1237 | shared_name + 4) == 0); |
eb4267a3 | 1238 | |
30dc85f1 | 1239 | sreloc = bfd_get_section_by_name (dynobj, shared_name); |
eb4267a3 ILT |
1240 | BFD_ASSERT (sreloc != NULL); |
1241 | } | |
1242 | ||
1243 | outrel.r_offset = (rel->r_offset | |
1244 | + input_section->output_section->vma | |
1245 | + input_section->output_offset); | |
1246 | if (r_type == R_386_PC32) | |
1247 | { | |
30dc85f1 ILT |
1248 | if (!h) |
1249 | { | |
1250 | if (! ((*info->callbacks->undefined_symbol) | |
1251 | (info, shared_name ? shared_name : sec->name, input_bfd, | |
1252 | input_section, rel->r_offset))) | |
1253 | bfd_set_error (bfd_error_bad_value); | |
1254 | return false; | |
1255 | } | |
1256 | else { | |
1257 | BFD_ASSERT (h->dynindx != -1); | |
1258 | outrel.r_info = ELF32_R_INFO (h->dynindx, R_386_PC32); | |
1259 | } | |
eb4267a3 ILT |
1260 | } |
1261 | else | |
1262 | { | |
1263 | if (h == NULL) | |
1264 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
1265 | else | |
1266 | { | |
1267 | BFD_ASSERT (h->dynindx != (bfd_vma) -1); | |
1268 | outrel.r_info = ELF32_R_INFO (h->dynindx, R_386_32); | |
1269 | } | |
1270 | } | |
1271 | ||
1272 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, | |
1273 | (((Elf32_External_Rel *) | |
1274 | sreloc->contents) | |
1275 | + sreloc->reloc_count)); | |
1276 | ++sreloc->reloc_count; | |
1277 | ||
1278 | /* If this reloc is against an external symbol, we do | |
1279 | not want to fiddle with the addend. Otherwise, we | |
1280 | need to include the symbol value so that it becomes | |
1281 | an addend for the dynamic reloc. */ | |
1282 | if (h != NULL) | |
1283 | continue; | |
1284 | } | |
1285 | ||
1286 | break; | |
1287 | ||
1288 | default: | |
1289 | break; | |
1290 | } | |
1291 | ||
013dec1a ILT |
1292 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
1293 | contents, rel->r_offset, | |
1294 | relocation, (bfd_vma) 0); | |
1295 | ||
1296 | if (r != bfd_reloc_ok) | |
1297 | { | |
1298 | switch (r) | |
1299 | { | |
1300 | default: | |
1301 | case bfd_reloc_outofrange: | |
1302 | abort (); | |
1303 | case bfd_reloc_overflow: | |
1304 | { | |
1305 | const char *name; | |
1306 | ||
1307 | if (h != NULL) | |
1308 | name = h->root.root.string; | |
1309 | else | |
1310 | { | |
eb4267a3 ILT |
1311 | name = elf_string_from_elf_section (input_bfd, |
1312 | symtab_hdr->sh_link, | |
1313 | sym->st_name); | |
013dec1a ILT |
1314 | if (name == NULL) |
1315 | return false; | |
1316 | if (*name == '\0') | |
1317 | name = bfd_section_name (input_bfd, sec); | |
1318 | } | |
1319 | if (! ((*info->callbacks->reloc_overflow) | |
1320 | (info, name, howto->name, (bfd_vma) 0, | |
1321 | input_bfd, input_section, rel->r_offset))) | |
1322 | return false; | |
1323 | } | |
1324 | break; | |
1325 | } | |
1326 | } | |
1327 | } | |
1328 | ||
1329 | return true; | |
1330 | } | |
1331 | ||
1332 | /* Finish up dynamic symbol handling. We set the contents of various | |
1333 | dynamic sections here. */ | |
1334 | ||
1335 | static boolean | |
1336 | elf_i386_finish_dynamic_symbol (output_bfd, info, h, sym) | |
1337 | bfd *output_bfd; | |
1338 | struct bfd_link_info *info; | |
1339 | struct elf_link_hash_entry *h; | |
1340 | Elf_Internal_Sym *sym; | |
1341 | { | |
eb4267a3 | 1342 | bfd *dynobj; |
013dec1a | 1343 | |
eb4267a3 | 1344 | dynobj = elf_hash_table (info)->dynobj; |
013dec1a | 1345 | |
eb4267a3 | 1346 | if (h->plt_offset != (bfd_vma) -1) |
013dec1a ILT |
1347 | { |
1348 | asection *splt; | |
1349 | asection *sgot; | |
1350 | asection *srel; | |
1351 | bfd_vma plt_index; | |
1352 | bfd_vma got_offset; | |
1353 | Elf_Internal_Rel rel; | |
1354 | ||
eb4267a3 ILT |
1355 | /* This symbol has an entry in the procedure linkage table. Set |
1356 | it up. */ | |
013dec1a | 1357 | |
eb4267a3 ILT |
1358 | BFD_ASSERT (h->dynindx != -1); |
1359 | ||
1360 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1361 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
1362 | srel = bfd_get_section_by_name (dynobj, ".rel.plt"); | |
1363 | BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL); | |
013dec1a ILT |
1364 | |
1365 | /* Get the index in the procedure linkage table which | |
1366 | corresponds to this symbol. This is the index of this symbol | |
1367 | in all the symbols for which we are making plt entries. The | |
1368 | first entry in the procedure linkage table is reserved. */ | |
eb4267a3 | 1369 | plt_index = h->plt_offset / PLT_ENTRY_SIZE - 1; |
013dec1a ILT |
1370 | |
1371 | /* Get the offset into the .got table of the entry that | |
1372 | corresponds to this function. Each .got entry is 4 bytes. | |
1373 | The first three are reserved. */ | |
1374 | got_offset = (plt_index + 3) * 4; | |
1375 | ||
1376 | /* Fill in the entry in the procedure linkage table. */ | |
eb4267a3 ILT |
1377 | if (! info->shared) |
1378 | { | |
1379 | memcpy (splt->contents + h->plt_offset, elf_i386_plt_entry, | |
1380 | PLT_ENTRY_SIZE); | |
1381 | bfd_put_32 (output_bfd, | |
1382 | (sgot->output_section->vma | |
1383 | + sgot->output_offset | |
1384 | + got_offset), | |
1385 | splt->contents + h->plt_offset + 2); | |
1386 | } | |
1387 | else | |
1388 | { | |
1389 | memcpy (splt->contents + h->plt_offset, elf_i386_pic_plt_entry, | |
1390 | PLT_ENTRY_SIZE); | |
1391 | bfd_put_32 (output_bfd, got_offset, | |
1392 | splt->contents + h->plt_offset + 2); | |
1393 | } | |
1394 | ||
013dec1a | 1395 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel), |
eb4267a3 ILT |
1396 | splt->contents + h->plt_offset + 7); |
1397 | bfd_put_32 (output_bfd, - (h->plt_offset + PLT_ENTRY_SIZE), | |
1398 | splt->contents + h->plt_offset + 12); | |
013dec1a ILT |
1399 | |
1400 | /* Fill in the entry in the global offset table. */ | |
1401 | bfd_put_32 (output_bfd, | |
1402 | (splt->output_section->vma | |
1403 | + splt->output_offset | |
eb4267a3 | 1404 | + h->plt_offset |
013dec1a ILT |
1405 | + 6), |
1406 | sgot->contents + got_offset); | |
1407 | ||
1408 | /* Fill in the entry in the .rel.plt section. */ | |
1409 | rel.r_offset = (sgot->output_section->vma | |
1410 | + sgot->output_offset | |
1411 | + got_offset); | |
1412 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT); | |
1413 | bfd_elf32_swap_reloc_out (output_bfd, &rel, | |
1414 | ((Elf32_External_Rel *) srel->contents | |
1415 | + plt_index)); | |
1416 | ||
eb4267a3 ILT |
1417 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
1418 | { | |
1419 | /* Mark the symbol as undefined, rather than as defined in | |
1420 | the .plt section. Leave the value alone. */ | |
1421 | sym->st_shndx = SHN_UNDEF; | |
1422 | } | |
013dec1a | 1423 | } |
eb4267a3 ILT |
1424 | |
1425 | if (h->got_offset != (bfd_vma) -1) | |
013dec1a | 1426 | { |
eb4267a3 ILT |
1427 | asection *sgot; |
1428 | asection *srel; | |
1429 | Elf_Internal_Rel rel; | |
013dec1a | 1430 | |
eb4267a3 ILT |
1431 | /* This symbol has an entry in the global offset table. Set it |
1432 | up. */ | |
1433 | ||
1434 | BFD_ASSERT (h->dynindx != -1); | |
013dec1a | 1435 | |
eb4267a3 ILT |
1436 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
1437 | srel = bfd_get_section_by_name (dynobj, ".rel.got"); | |
1438 | BFD_ASSERT (sgot != NULL && srel != NULL); | |
1439 | ||
1440 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got_offset); | |
1441 | ||
1442 | rel.r_offset = (sgot->output_section->vma | |
1443 | + sgot->output_offset | |
1444 | + h->got_offset); | |
1445 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT); | |
1446 | bfd_elf32_swap_reloc_out (output_bfd, &rel, | |
1447 | ((Elf32_External_Rel *) srel->contents | |
1448 | + srel->reloc_count)); | |
1449 | ++srel->reloc_count; | |
1450 | } | |
1451 | ||
1452 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) | |
1453 | { | |
1454 | asection *s; | |
1455 | Elf_Internal_Rel rel; | |
1456 | ||
1457 | /* This symbol needs a copy reloc. Set it up. */ | |
1458 | ||
1459 | BFD_ASSERT (h->dynindx != -1 | |
30dc85f1 ILT |
1460 | && (h->root.type == bfd_link_hash_defined |
1461 | || h->root.type == bfd_link_hash_defweak)); | |
eb4267a3 ILT |
1462 | |
1463 | s = bfd_get_section_by_name (h->root.u.def.section->owner, | |
1464 | ".rel.bss"); | |
1465 | BFD_ASSERT (s != NULL); | |
1466 | ||
1467 | rel.r_offset = (h->root.u.def.value | |
1468 | + h->root.u.def.section->output_section->vma | |
1469 | + h->root.u.def.section->output_offset); | |
1470 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY); | |
1471 | bfd_elf32_swap_reloc_out (output_bfd, &rel, | |
1472 | ((Elf32_External_Rel *) s->contents | |
1473 | + s->reloc_count)); | |
1474 | ++s->reloc_count; | |
013dec1a ILT |
1475 | } |
1476 | ||
eb4267a3 ILT |
1477 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ |
1478 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
1479 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
1480 | sym->st_shndx = SHN_ABS; | |
1481 | ||
013dec1a ILT |
1482 | return true; |
1483 | } | |
1484 | ||
1485 | /* Finish up the dynamic sections. */ | |
1486 | ||
1487 | static boolean | |
1488 | elf_i386_finish_dynamic_sections (output_bfd, info) | |
1489 | bfd *output_bfd; | |
1490 | struct bfd_link_info *info; | |
1491 | { | |
eb4267a3 | 1492 | bfd *dynobj; |
013dec1a ILT |
1493 | asection *sgot; |
1494 | asection *sdyn; | |
013dec1a | 1495 | |
eb4267a3 ILT |
1496 | dynobj = elf_hash_table (info)->dynobj; |
1497 | ||
eb4267a3 | 1498 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); |
12662be4 | 1499 | BFD_ASSERT (sgot != NULL); |
eb4267a3 | 1500 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
013dec1a | 1501 | |
12662be4 | 1502 | if (elf_hash_table (info)->dynamic_sections_created) |
013dec1a | 1503 | { |
12662be4 ILT |
1504 | asection *splt; |
1505 | Elf32_External_Dyn *dyncon, *dynconend; | |
013dec1a | 1506 | |
12662be4 ILT |
1507 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
1508 | BFD_ASSERT (splt != NULL && sdyn != NULL); | |
013dec1a | 1509 | |
12662be4 ILT |
1510 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
1511 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); | |
1512 | for (; dyncon < dynconend; dyncon++) | |
013dec1a | 1513 | { |
12662be4 ILT |
1514 | Elf_Internal_Dyn dyn; |
1515 | const char *name; | |
1516 | asection *s; | |
eb4267a3 | 1517 | |
12662be4 | 1518 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
eb4267a3 | 1519 | |
12662be4 | 1520 | switch (dyn.d_tag) |
013dec1a | 1521 | { |
12662be4 ILT |
1522 | default: |
1523 | break; | |
1524 | ||
1525 | case DT_PLTGOT: | |
1526 | name = ".got"; | |
1527 | goto get_vma; | |
1528 | case DT_JMPREL: | |
1529 | name = ".rel.plt"; | |
1530 | get_vma: | |
1531 | s = bfd_get_section_by_name (output_bfd, name); | |
1532 | BFD_ASSERT (s != NULL); | |
1533 | dyn.d_un.d_ptr = s->vma; | |
1534 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
1535 | break; | |
1536 | ||
1537 | case DT_PLTRELSZ: | |
1538 | s = bfd_get_section_by_name (output_bfd, ".rel.plt"); | |
1539 | BFD_ASSERT (s != NULL); | |
013dec1a | 1540 | if (s->_cooked_size != 0) |
12662be4 | 1541 | dyn.d_un.d_val = s->_cooked_size; |
013dec1a | 1542 | else |
12662be4 ILT |
1543 | dyn.d_un.d_val = s->_raw_size; |
1544 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
1545 | break; | |
1546 | ||
1547 | case DT_RELSZ: | |
1548 | /* My reading of the SVR4 ABI indicates that the | |
1549 | procedure linkage table relocs (DT_JMPREL) should be | |
1550 | included in the overall relocs (DT_REL). This is | |
1551 | what Solaris does. However, UnixWare can not handle | |
1552 | that case. Therefore, we override the DT_RELSZ entry | |
1553 | here to make it not include the JMPREL relocs. Since | |
1554 | the linker script arranges for .rel.plt to follow all | |
1555 | other relocation sections, we don't have to worry | |
1556 | about changing the DT_REL entry. */ | |
1557 | s = bfd_get_section_by_name (output_bfd, ".rel.plt"); | |
1558 | if (s != NULL) | |
1559 | { | |
1560 | if (s->_cooked_size != 0) | |
1561 | dyn.d_un.d_val -= s->_cooked_size; | |
1562 | else | |
1563 | dyn.d_un.d_val -= s->_raw_size; | |
1564 | } | |
1565 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
1566 | break; | |
013dec1a | 1567 | } |
013dec1a | 1568 | } |
013dec1a | 1569 | |
12662be4 ILT |
1570 | /* Fill in the first entry in the procedure linkage table. */ |
1571 | if (splt->_raw_size > 0) | |
eb4267a3 | 1572 | { |
12662be4 ILT |
1573 | if (info->shared) |
1574 | memcpy (splt->contents, elf_i386_pic_plt0_entry, PLT_ENTRY_SIZE); | |
1575 | else | |
1576 | { | |
1577 | memcpy (splt->contents, elf_i386_plt0_entry, PLT_ENTRY_SIZE); | |
1578 | bfd_put_32 (output_bfd, | |
1579 | sgot->output_section->vma + sgot->output_offset + 4, | |
1580 | splt->contents + 2); | |
1581 | bfd_put_32 (output_bfd, | |
1582 | sgot->output_section->vma + sgot->output_offset + 8, | |
1583 | splt->contents + 8); | |
1584 | } | |
eb4267a3 | 1585 | } |
12662be4 ILT |
1586 | |
1587 | /* UnixWare sets the entsize of .plt to 4, although that doesn't | |
1588 | really seem like the right value. */ | |
1589 | elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4; | |
013dec1a ILT |
1590 | } |
1591 | ||
1592 | /* Fill in the first three entries in the global offset table. */ | |
1593 | if (sgot->_raw_size > 0) | |
1594 | { | |
12662be4 ILT |
1595 | if (sdyn == NULL) |
1596 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); | |
1597 | else | |
1598 | bfd_put_32 (output_bfd, | |
1599 | sdyn->output_section->vma + sdyn->output_offset, | |
1600 | sgot->contents); | |
013dec1a ILT |
1601 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); |
1602 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); | |
1603 | } | |
1604 | ||
1605 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; | |
1606 | ||
013dec1a ILT |
1607 | return true; |
1608 | } | |
e4b6b3e7 ILT |
1609 | |
1610 | #define TARGET_LITTLE_SYM bfd_elf32_i386_vec | |
1611 | #define TARGET_LITTLE_NAME "elf32-i386" | |
1612 | #define ELF_ARCH bfd_arch_i386 | |
68241b2b | 1613 | #define ELF_MACHINE_CODE EM_386 |
e4b6b3e7 ILT |
1614 | #define elf_info_to_howto elf_i386_info_to_howto |
1615 | #define elf_info_to_howto_rel elf_i386_info_to_howto_rel | |
1616 | #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup | |
68241b2b | 1617 | #define ELF_MAXPAGESIZE 0x1000 |
013dec1a ILT |
1618 | #define elf_backend_create_dynamic_sections \ |
1619 | elf_i386_create_dynamic_sections | |
eb4267a3 | 1620 | #define elf_backend_check_relocs elf_i386_check_relocs |
013dec1a ILT |
1621 | #define elf_backend_adjust_dynamic_symbol \ |
1622 | elf_i386_adjust_dynamic_symbol | |
1623 | #define elf_backend_size_dynamic_sections \ | |
1624 | elf_i386_size_dynamic_sections | |
1625 | #define elf_backend_relocate_section elf_i386_relocate_section | |
1626 | #define elf_backend_finish_dynamic_symbol \ | |
1627 | elf_i386_finish_dynamic_symbol | |
1628 | #define elf_backend_finish_dynamic_sections \ | |
1629 | elf_i386_finish_dynamic_sections | |
e4b6b3e7 ILT |
1630 | |
1631 | #include "elf32-target.h" |