Commit | Line | Data |
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252b5132 | 1 | /* BFD back-end for Intel 386 COFF files. |
2571583a | 2 | Copyright (C) 1990-2017 Free Software Foundation, Inc. |
252b5132 RH |
3 | Written by Cygnus Support. |
4 | ||
977cdf5a | 5 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 6 | |
977cdf5a NC |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 9 | the Free Software Foundation; either version 3 of the License, or |
977cdf5a | 10 | (at your option) any later version. |
252b5132 | 11 | |
977cdf5a NC |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
252b5132 | 16 | |
977cdf5a NC |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
cd123cb7 NC |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
20 | MA 02110-1301, USA. */ | |
252b5132 | 21 | |
252b5132 | 22 | #include "sysdep.h" |
3db64b00 | 23 | #include "bfd.h" |
252b5132 RH |
24 | #include "libbfd.h" |
25 | ||
26 | #include "coff/i386.h" | |
27 | ||
28 | #include "coff/internal.h" | |
29 | ||
30 | #ifdef COFF_WITH_PE | |
31 | #include "coff/pe.h" | |
32 | #endif | |
33 | ||
34 | #ifdef COFF_GO32_EXE | |
35 | #include "coff/go32exe.h" | |
36 | #endif | |
37 | ||
2b5c217d NC |
38 | #ifndef bfd_pe_print_pdata |
39 | #define bfd_pe_print_pdata NULL | |
40 | #endif | |
41 | ||
252b5132 RH |
42 | #include "libcoff.h" |
43 | ||
252b5132 | 44 | static reloc_howto_type *coff_i386_rtype_to_howto |
e05da72d NC |
45 | (bfd *, asection *, struct internal_reloc *, |
46 | struct coff_link_hash_entry *, struct internal_syment *, | |
47 | bfd_vma *); | |
00692651 | 48 | static reloc_howto_type *coff_i386_reloc_type_lookup |
e05da72d | 49 | (bfd *, bfd_reloc_code_real_type); |
252b5132 RH |
50 | |
51 | #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2) | |
52 | /* The page size is a guess based on ELF. */ | |
53 | ||
54 | #define COFF_PAGE_SIZE 0x1000 | |
55 | ||
56 | /* For some reason when using i386 COFF the value stored in the .text | |
57 | section for a reference to a common symbol is the value itself plus | |
58 | any desired offset. Ian Taylor, Cygnus Support. */ | |
59 | ||
1049f94e | 60 | /* If we are producing relocatable output, we need to do some |
252b5132 RH |
61 | adjustments to the object file that are not done by the |
62 | bfd_perform_relocation function. This function is called by every | |
63 | reloc type to make any required adjustments. */ | |
64 | ||
65 | static bfd_reloc_status_type | |
2c3fc389 NC |
66 | coff_i386_reloc (bfd *abfd, |
67 | arelent *reloc_entry, | |
68 | asymbol *symbol, | |
69 | void * data, | |
70 | asection *input_section ATTRIBUTE_UNUSED, | |
71 | bfd *output_bfd, | |
72 | char **error_message ATTRIBUTE_UNUSED) | |
252b5132 RH |
73 | { |
74 | symvalue diff; | |
75 | ||
689be717 | 76 | #ifndef COFF_WITH_PE |
252b5132 RH |
77 | if (output_bfd == (bfd *) NULL) |
78 | return bfd_reloc_continue; | |
689be717 | 79 | #endif |
252b5132 RH |
80 | |
81 | if (bfd_is_com_section (symbol->section)) | |
82 | { | |
83 | #ifndef COFF_WITH_PE | |
84 | /* We are relocating a common symbol. The current value in the | |
85 | object file is ORIG + OFFSET, where ORIG is the value of the | |
86 | common symbol as seen by the object file when it was compiled | |
87 | (this may be zero if the symbol was undefined) and OFFSET is | |
88 | the offset into the common symbol (normally zero, but may be | |
89 | non-zero when referring to a field in a common structure). | |
90 | ORIG is the negative of reloc_entry->addend, which is set by | |
91 | the CALC_ADDEND macro below. We want to replace the value in | |
92 | the object file with NEW + OFFSET, where NEW is the value of | |
93 | the common symbol which we are going to put in the final | |
94 | object file. NEW is symbol->value. */ | |
95 | diff = symbol->value + reloc_entry->addend; | |
96 | #else | |
97 | /* In PE mode, we do not offset the common symbol. */ | |
98 | diff = reloc_entry->addend; | |
99 | #endif | |
100 | } | |
101 | else | |
102 | { | |
103 | /* For some reason bfd_perform_relocation always effectively | |
104 | ignores the addend for a COFF target when producing | |
1049f94e | 105 | relocatable output. This seems to be always wrong for 386 |
252b5132 | 106 | COFF, so we handle the addend here instead. */ |
689be717 L |
107 | #ifdef COFF_WITH_PE |
108 | if (output_bfd == (bfd *) NULL) | |
109 | { | |
110 | reloc_howto_type *howto = reloc_entry->howto; | |
111 | ||
112 | /* Although PC relative relocations are very similar between | |
113 | PE and non-PE formats, but they are off by 1 << howto->size | |
114 | bytes. For the external relocation, PE is very different | |
115 | from others. See md_apply_fix3 () in gas/config/tc-i386.c. | |
116 | When we link PE and non-PE object files together to | |
117 | generate a non-PE executable, we have to compensate it | |
118 | here. */ | |
82e51918 | 119 | if (howto->pc_relative && howto->pcrel_offset) |
689be717 | 120 | diff = -(1 << howto->size); |
977cdf5a NC |
121 | else if (symbol->flags & BSF_WEAK) |
122 | diff = reloc_entry->addend - symbol->value; | |
689be717 L |
123 | else |
124 | diff = -reloc_entry->addend; | |
125 | } | |
126 | else | |
127 | #endif | |
128 | diff = reloc_entry->addend; | |
252b5132 RH |
129 | } |
130 | ||
131 | #ifdef COFF_WITH_PE | |
132 | /* FIXME: How should this case be handled? */ | |
8e191bd3 ILT |
133 | if (reloc_entry->howto->type == R_IMAGEBASE |
134 | && output_bfd != NULL | |
135 | && bfd_get_flavour(output_bfd) == bfd_target_coff_flavour) | |
00692651 | 136 | diff -= pe_data (output_bfd)->pe_opthdr.ImageBase; |
252b5132 RH |
137 | #endif |
138 | ||
139 | #define DOIT(x) \ | |
140 | x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + diff) & howto->dst_mask)) | |
141 | ||
ec70be9f NC |
142 | if (diff != 0) |
143 | { | |
144 | reloc_howto_type *howto = reloc_entry->howto; | |
145 | unsigned char *addr = (unsigned char *) data + reloc_entry->address; | |
146 | ||
147 | switch (howto->size) | |
148 | { | |
149 | case 0: | |
150 | { | |
151 | char x = bfd_get_8 (abfd, addr); | |
152 | DOIT (x); | |
153 | bfd_put_8 (abfd, x, addr); | |
154 | } | |
155 | break; | |
252b5132 | 156 | |
ec70be9f | 157 | case 1: |
252b5132 | 158 | { |
ec70be9f NC |
159 | short x = bfd_get_16 (abfd, addr); |
160 | DOIT (x); | |
161 | bfd_put_16 (abfd, (bfd_vma) x, addr); | |
252b5132 | 162 | } |
ec70be9f NC |
163 | break; |
164 | ||
165 | case 2: | |
166 | { | |
167 | long x = bfd_get_32 (abfd, addr); | |
168 | DOIT (x); | |
169 | bfd_put_32 (abfd, (bfd_vma) x, addr); | |
170 | } | |
171 | break; | |
172 | ||
173 | default: | |
174 | abort (); | |
175 | } | |
176 | } | |
252b5132 RH |
177 | |
178 | /* Now let bfd_perform_relocation finish everything up. */ | |
179 | return bfd_reloc_continue; | |
180 | } | |
181 | ||
182 | #ifdef COFF_WITH_PE | |
b34976b6 | 183 | /* Return TRUE if this relocation should appear in the output .reloc |
6fb72d08 ILT |
184 | section. */ |
185 | ||
2c3fc389 NC |
186 | static bfd_boolean in_reloc_p (bfd * abfd ATTRIBUTE_UNUSED, |
187 | reloc_howto_type *howto) | |
252b5132 | 188 | { |
b706dc83 KT |
189 | return ! howto->pc_relative && howto->type != R_IMAGEBASE |
190 | && howto->type != R_SECREL32; | |
b7be1db6 | 191 | } |
6fb72d08 | 192 | #endif /* COFF_WITH_PE */ |
252b5132 RH |
193 | |
194 | #ifndef PCRELOFFSET | |
b34976b6 | 195 | #define PCRELOFFSET FALSE |
252b5132 RH |
196 | #endif |
197 | ||
b7be1db6 | 198 | static reloc_howto_type howto_table[] = |
252b5132 | 199 | { |
5f771d47 ILT |
200 | EMPTY_HOWTO (0), |
201 | EMPTY_HOWTO (1), | |
202 | EMPTY_HOWTO (2), | |
203 | EMPTY_HOWTO (3), | |
204 | EMPTY_HOWTO (4), | |
205 | EMPTY_HOWTO (5), | |
b7be1db6 AM |
206 | HOWTO (R_DIR32, /* type */ |
207 | 0, /* rightshift */ | |
208 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
209 | 32, /* bitsize */ | |
b34976b6 | 210 | FALSE, /* pc_relative */ |
b7be1db6 | 211 | 0, /* bitpos */ |
252b5132 | 212 | complain_overflow_bitfield, /* complain_on_overflow */ |
b7be1db6 AM |
213 | coff_i386_reloc, /* special_function */ |
214 | "dir32", /* name */ | |
b34976b6 | 215 | TRUE, /* partial_inplace */ |
b7be1db6 AM |
216 | 0xffffffff, /* src_mask */ |
217 | 0xffffffff, /* dst_mask */ | |
b34976b6 | 218 | TRUE), /* pcrel_offset */ |
b7be1db6 AM |
219 | /* PE IMAGE_REL_I386_DIR32NB relocation (7). */ |
220 | HOWTO (R_IMAGEBASE, /* type */ | |
221 | 0, /* rightshift */ | |
222 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
223 | 32, /* bitsize */ | |
b34976b6 | 224 | FALSE, /* pc_relative */ |
b7be1db6 | 225 | 0, /* bitpos */ |
252b5132 | 226 | complain_overflow_bitfield, /* complain_on_overflow */ |
b7be1db6 AM |
227 | coff_i386_reloc, /* special_function */ |
228 | "rva32", /* name */ | |
b34976b6 | 229 | TRUE, /* partial_inplace */ |
b7be1db6 AM |
230 | 0xffffffff, /* src_mask */ |
231 | 0xffffffff, /* dst_mask */ | |
b34976b6 | 232 | FALSE), /* pcrel_offset */ |
5f771d47 ILT |
233 | EMPTY_HOWTO (010), |
234 | EMPTY_HOWTO (011), | |
235 | EMPTY_HOWTO (012), | |
6482c264 NC |
236 | #ifdef COFF_WITH_PE |
237 | /* 32-bit longword section relative relocation (013). */ | |
238 | HOWTO (R_SECREL32, /* type */ | |
239 | 0, /* rightshift */ | |
240 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
241 | 32, /* bitsize */ | |
242 | FALSE, /* pc_relative */ | |
243 | 0, /* bitpos */ | |
244 | complain_overflow_bitfield, /* complain_on_overflow */ | |
245 | coff_i386_reloc, /* special_function */ | |
246 | "secrel32", /* name */ | |
247 | TRUE, /* partial_inplace */ | |
248 | 0xffffffff, /* src_mask */ | |
249 | 0xffffffff, /* dst_mask */ | |
250 | TRUE), /* pcrel_offset */ | |
251 | #else | |
5f771d47 | 252 | EMPTY_HOWTO (013), |
6482c264 | 253 | #endif |
5f771d47 ILT |
254 | EMPTY_HOWTO (014), |
255 | EMPTY_HOWTO (015), | |
256 | EMPTY_HOWTO (016), | |
00692651 ILT |
257 | /* Byte relocation (017). */ |
258 | HOWTO (R_RELBYTE, /* type */ | |
b7be1db6 AM |
259 | 0, /* rightshift */ |
260 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
261 | 8, /* bitsize */ | |
b34976b6 | 262 | FALSE, /* pc_relative */ |
b7be1db6 | 263 | 0, /* bitpos */ |
252b5132 | 264 | complain_overflow_bitfield, /* complain_on_overflow */ |
b7be1db6 AM |
265 | coff_i386_reloc, /* special_function */ |
266 | "8", /* name */ | |
b34976b6 | 267 | TRUE, /* partial_inplace */ |
b7be1db6 AM |
268 | 0x000000ff, /* src_mask */ |
269 | 0x000000ff, /* dst_mask */ | |
252b5132 | 270 | PCRELOFFSET), /* pcrel_offset */ |
00692651 | 271 | /* 16-bit word relocation (020). */ |
b7be1db6 AM |
272 | HOWTO (R_RELWORD, /* type */ |
273 | 0, /* rightshift */ | |
274 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
275 | 16, /* bitsize */ | |
b34976b6 | 276 | FALSE, /* pc_relative */ |
b7be1db6 | 277 | 0, /* bitpos */ |
252b5132 | 278 | complain_overflow_bitfield, /* complain_on_overflow */ |
b7be1db6 AM |
279 | coff_i386_reloc, /* special_function */ |
280 | "16", /* name */ | |
b34976b6 | 281 | TRUE, /* partial_inplace */ |
b7be1db6 AM |
282 | 0x0000ffff, /* src_mask */ |
283 | 0x0000ffff, /* dst_mask */ | |
252b5132 | 284 | PCRELOFFSET), /* pcrel_offset */ |
b7be1db6 AM |
285 | /* 32-bit longword relocation (021). */ |
286 | HOWTO (R_RELLONG, /* type */ | |
287 | 0, /* rightshift */ | |
288 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
289 | 32, /* bitsize */ | |
b34976b6 | 290 | FALSE, /* pc_relative */ |
b7be1db6 | 291 | 0, /* bitpos */ |
252b5132 | 292 | complain_overflow_bitfield, /* complain_on_overflow */ |
b7be1db6 AM |
293 | coff_i386_reloc, /* special_function */ |
294 | "32", /* name */ | |
b34976b6 | 295 | TRUE, /* partial_inplace */ |
b7be1db6 AM |
296 | 0xffffffff, /* src_mask */ |
297 | 0xffffffff, /* dst_mask */ | |
252b5132 | 298 | PCRELOFFSET), /* pcrel_offset */ |
b7be1db6 AM |
299 | /* Byte PC relative relocation (022). */ |
300 | HOWTO (R_PCRBYTE, /* type */ | |
301 | 0, /* rightshift */ | |
302 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
303 | 8, /* bitsize */ | |
b34976b6 | 304 | TRUE, /* pc_relative */ |
b7be1db6 | 305 | 0, /* bitpos */ |
252b5132 | 306 | complain_overflow_signed, /* complain_on_overflow */ |
b7be1db6 AM |
307 | coff_i386_reloc, /* special_function */ |
308 | "DISP8", /* name */ | |
b34976b6 | 309 | TRUE, /* partial_inplace */ |
b7be1db6 AM |
310 | 0x000000ff, /* src_mask */ |
311 | 0x000000ff, /* dst_mask */ | |
252b5132 | 312 | PCRELOFFSET), /* pcrel_offset */ |
b7be1db6 AM |
313 | /* 16-bit word PC relative relocation (023). */ |
314 | HOWTO (R_PCRWORD, /* type */ | |
315 | 0, /* rightshift */ | |
316 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
317 | 16, /* bitsize */ | |
b34976b6 | 318 | TRUE, /* pc_relative */ |
b7be1db6 | 319 | 0, /* bitpos */ |
252b5132 | 320 | complain_overflow_signed, /* complain_on_overflow */ |
b7be1db6 AM |
321 | coff_i386_reloc, /* special_function */ |
322 | "DISP16", /* name */ | |
b34976b6 | 323 | TRUE, /* partial_inplace */ |
b7be1db6 AM |
324 | 0x0000ffff, /* src_mask */ |
325 | 0x0000ffff, /* dst_mask */ | |
252b5132 | 326 | PCRELOFFSET), /* pcrel_offset */ |
00692651 | 327 | /* 32-bit longword PC relative relocation (024). */ |
b7be1db6 AM |
328 | HOWTO (R_PCRLONG, /* type */ |
329 | 0, /* rightshift */ | |
330 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
331 | 32, /* bitsize */ | |
b34976b6 | 332 | TRUE, /* pc_relative */ |
b7be1db6 | 333 | 0, /* bitpos */ |
252b5132 | 334 | complain_overflow_signed, /* complain_on_overflow */ |
b7be1db6 AM |
335 | coff_i386_reloc, /* special_function */ |
336 | "DISP32", /* name */ | |
b34976b6 | 337 | TRUE, /* partial_inplace */ |
b7be1db6 AM |
338 | 0xffffffff, /* src_mask */ |
339 | 0xffffffff, /* dst_mask */ | |
252b5132 RH |
340 | PCRELOFFSET) /* pcrel_offset */ |
341 | }; | |
342 | ||
36e9d67b NC |
343 | #define NUM_HOWTOS (sizeof (howto_table) / sizeof (howto_table[0])) |
344 | ||
252b5132 RH |
345 | /* Turn a howto into a reloc nunmber */ |
346 | ||
347 | #define SELECT_RELOC(x,howto) { x.r_type = howto->type; } | |
348 | #define BADMAG(x) I386BADMAG(x) | |
349 | #define I386 1 /* Customize coffcode.h */ | |
350 | ||
36e9d67b NC |
351 | #define RTYPE2HOWTO(cache_ptr, dst) \ |
352 | ((cache_ptr)->howto = \ | |
353 | ((dst)->r_type < NUM_HOWTOS \ | |
354 | ? howto_table + (dst)->r_type \ | |
00692651 | 355 | : NULL)) |
252b5132 RH |
356 | |
357 | /* For 386 COFF a STYP_NOLOAD | STYP_BSS section is part of a shared | |
358 | library. On some other COFF targets STYP_BSS is normally | |
359 | STYP_NOLOAD. */ | |
360 | #define BSS_NOLOAD_IS_SHARED_LIBRARY | |
361 | ||
362 | /* Compute the addend of a reloc. If the reloc is to a common symbol, | |
363 | the object file contains the value of the common symbol. By the | |
364 | time this is called, the linker may be using a different symbol | |
365 | from a different object file with a different value. Therefore, we | |
366 | hack wildly to locate the original symbol from this file so that we | |
367 | can make the correct adjustment. This macro sets coffsym to the | |
368 | symbol from the original file, and uses it to set the addend value | |
369 | correctly. If this is not a common symbol, the usual addend | |
370 | calculation is done, except that an additional tweak is needed for | |
371 | PC relative relocs. | |
372 | FIXME: This macro refers to symbols and asect; these are from the | |
373 | calling function, not the macro arguments. */ | |
374 | ||
375 | #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \ | |
376 | { \ | |
377 | coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \ | |
378 | if (ptr && bfd_asymbol_bfd (ptr) != abfd) \ | |
379 | coffsym = (obj_symbols (abfd) \ | |
380 | + (cache_ptr->sym_ptr_ptr - symbols)); \ | |
381 | else if (ptr) \ | |
f4943d82 | 382 | coffsym = coff_symbol_from (ptr); \ |
252b5132 RH |
383 | if (coffsym != (coff_symbol_type *) NULL \ |
384 | && coffsym->native->u.syment.n_scnum == 0) \ | |
385 | cache_ptr->addend = - coffsym->native->u.syment.n_value; \ | |
386 | else if (ptr && bfd_asymbol_bfd (ptr) == abfd \ | |
387 | && ptr->section != (asection *) NULL) \ | |
388 | cache_ptr->addend = - (ptr->section->vma + ptr->value); \ | |
389 | else \ | |
390 | cache_ptr->addend = 0; \ | |
36e9d67b NC |
391 | if (ptr && reloc.r_type < NUM_HOWTOS \ |
392 | && howto_table[reloc.r_type].pc_relative) \ | |
252b5132 RH |
393 | cache_ptr->addend += asect->vma; \ |
394 | } | |
395 | ||
396 | /* We use the special COFF backend linker. For normal i386 COFF, we | |
397 | can use the generic relocate_section routine. For PE, we need our | |
398 | own routine. */ | |
399 | ||
400 | #ifndef COFF_WITH_PE | |
401 | ||
402 | #define coff_relocate_section _bfd_coff_generic_relocate_section | |
403 | ||
404 | #else /* COFF_WITH_PE */ | |
405 | ||
406 | /* The PE relocate section routine. The only difference between this | |
407 | and the regular routine is that we don't want to do anything for a | |
1049f94e | 408 | relocatable link. */ |
252b5132 | 409 | |
b34976b6 | 410 | static bfd_boolean |
2c3fc389 NC |
411 | coff_pe_i386_relocate_section (bfd *output_bfd, |
412 | struct bfd_link_info *info, | |
413 | bfd *input_bfd, | |
414 | asection *input_section, | |
415 | bfd_byte *contents, | |
416 | struct internal_reloc *relocs, | |
417 | struct internal_syment *syms, | |
418 | asection **sections) | |
252b5132 | 419 | { |
0e1862bb | 420 | if (bfd_link_relocatable (info)) |
b34976b6 | 421 | return TRUE; |
252b5132 RH |
422 | |
423 | return _bfd_coff_generic_relocate_section (output_bfd, info, input_bfd, | |
424 | input_section, contents, | |
425 | relocs, syms, sections); | |
426 | } | |
427 | ||
428 | #define coff_relocate_section coff_pe_i386_relocate_section | |
429 | ||
430 | #endif /* COFF_WITH_PE */ | |
431 | ||
432 | /* Convert an rtype to howto for the COFF backend linker. */ | |
433 | ||
434 | static reloc_howto_type * | |
2c3fc389 NC |
435 | coff_i386_rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED, |
436 | asection *sec, | |
437 | struct internal_reloc *rel, | |
438 | struct coff_link_hash_entry *h, | |
439 | struct internal_syment *sym, | |
440 | bfd_vma *addendp) | |
252b5132 | 441 | { |
252b5132 RH |
442 | reloc_howto_type *howto; |
443 | ||
36e9d67b | 444 | if (rel->r_type >= NUM_HOWTOS) |
00692651 ILT |
445 | { |
446 | bfd_set_error (bfd_error_bad_value); | |
447 | return NULL; | |
448 | } | |
449 | ||
252b5132 RH |
450 | howto = howto_table + rel->r_type; |
451 | ||
452 | #ifdef COFF_WITH_PE | |
00692651 | 453 | /* Cancel out code in _bfd_coff_generic_relocate_section. */ |
252b5132 RH |
454 | *addendp = 0; |
455 | #endif | |
456 | ||
457 | if (howto->pc_relative) | |
458 | *addendp += sec->vma; | |
459 | ||
460 | if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0) | |
461 | { | |
462 | /* This is a common symbol. The section contents include the | |
463 | size (sym->n_value) as an addend. The relocate_section | |
464 | function will be adding in the final value of the symbol. We | |
465 | need to subtract out the current size in order to get the | |
466 | correct result. */ | |
b7be1db6 | 467 | |
252b5132 RH |
468 | BFD_ASSERT (h != NULL); |
469 | ||
470 | #ifndef COFF_WITH_PE | |
471 | /* I think we *do* want to bypass this. If we don't, I have | |
472 | seen some data parameters get the wrong relocation address. | |
473 | If I link two versions with and without this section bypassed | |
474 | and then do a binary comparison, the addresses which are | |
475 | different can be looked up in the map. The case in which | |
476 | this section has been bypassed has addresses which correspond | |
477 | to values I can find in the map. */ | |
478 | *addendp -= sym->n_value; | |
479 | #endif | |
480 | } | |
481 | ||
482 | #ifndef COFF_WITH_PE | |
483 | /* If the output symbol is common (in which case this must be a | |
1049f94e | 484 | relocatable link), we need to add in the final size of the |
252b5132 | 485 | common symbol. */ |
b7be1db6 | 486 | if (h != NULL && h->root.type == bfd_link_hash_common) |
252b5132 RH |
487 | *addendp += h->root.u.c.size; |
488 | #endif | |
489 | ||
490 | #ifdef COFF_WITH_PE | |
491 | if (howto->pc_relative) | |
492 | { | |
493 | *addendp -= 4; | |
494 | ||
495 | /* If the symbol is defined, then the generic code is going to | |
496 | add back the symbol value in order to cancel out an | |
497 | adjustment it made to the addend. However, we set the addend | |
498 | to 0 at the start of this function. We need to adjust here, | |
499 | to avoid the adjustment the generic code will make. FIXME: | |
500 | This is getting a bit hackish. */ | |
501 | if (sym != NULL && sym->n_scnum != 0) | |
502 | *addendp -= sym->n_value; | |
503 | } | |
504 | ||
8e191bd3 ILT |
505 | if (rel->r_type == R_IMAGEBASE |
506 | && (bfd_get_flavour(sec->output_section->owner) | |
507 | == bfd_target_coff_flavour)) | |
252b5132 RH |
508 | { |
509 | *addendp -= pe_data(sec->output_section->owner)->pe_opthdr.ImageBase; | |
510 | } | |
6482c264 | 511 | |
a93d5cb1 NC |
512 | /* PR 17099 - Absolute R_PCRLONG relocations do not need a symbol. */ |
513 | if (rel->r_type == R_PCRLONG && sym == NULL) | |
514 | *addendp -= rel->r_vaddr; | |
515 | else | |
516 | BFD_ASSERT (sym != NULL); | |
517 | ||
507f5898 | 518 | if (rel->r_type == R_SECREL32 && sym != NULL) |
6482c264 NC |
519 | { |
520 | bfd_vma osect_vma; | |
521 | ||
8a5dcf53 AM |
522 | if (h && (h->root.type == bfd_link_hash_defined |
523 | || h->root.type == bfd_link_hash_defweak)) | |
6482c264 NC |
524 | osect_vma = h->root.u.def.section->output_section->vma; |
525 | else | |
526 | { | |
91d6fa6a | 527 | asection *s; |
6482c264 NC |
528 | int i; |
529 | ||
530 | /* Sigh, the only way to get the section to offset against | |
531 | is to find it the hard way. */ | |
532 | ||
91d6fa6a NC |
533 | for (s = abfd->sections, i = 1; i < sym->n_scnum; i++) |
534 | s = s->next; | |
6482c264 | 535 | |
91d6fa6a | 536 | osect_vma = s->output_section->vma; |
6482c264 NC |
537 | } |
538 | ||
539 | *addendp -= osect_vma; | |
540 | } | |
252b5132 RH |
541 | #endif |
542 | ||
543 | return howto; | |
544 | } | |
545 | ||
252b5132 | 546 | #define coff_bfd_reloc_type_lookup coff_i386_reloc_type_lookup |
157090f7 | 547 | #define coff_bfd_reloc_name_lookup coff_i386_reloc_name_lookup |
252b5132 | 548 | |
252b5132 | 549 | static reloc_howto_type * |
2c3fc389 NC |
550 | coff_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
551 | bfd_reloc_code_real_type code) | |
252b5132 RH |
552 | { |
553 | switch (code) | |
554 | { | |
555 | case BFD_RELOC_RVA: | |
b7be1db6 | 556 | return howto_table + R_IMAGEBASE; |
252b5132 RH |
557 | case BFD_RELOC_32: |
558 | return howto_table + R_DIR32; | |
559 | case BFD_RELOC_32_PCREL: | |
560 | return howto_table + R_PCRLONG; | |
b7be1db6 AM |
561 | case BFD_RELOC_16: |
562 | return howto_table + R_RELWORD; | |
563 | case BFD_RELOC_16_PCREL: | |
564 | return howto_table + R_PCRWORD; | |
565 | case BFD_RELOC_8: | |
566 | return howto_table + R_RELBYTE; | |
567 | case BFD_RELOC_8_PCREL: | |
568 | return howto_table + R_PCRBYTE; | |
6482c264 NC |
569 | #ifdef COFF_WITH_PE |
570 | case BFD_RELOC_32_SECREL: | |
571 | return howto_table + R_SECREL32; | |
572 | #endif | |
252b5132 RH |
573 | default: |
574 | BFD_FAIL (); | |
575 | return 0; | |
576 | } | |
577 | } | |
578 | ||
157090f7 AM |
579 | static reloc_howto_type * |
580 | coff_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
581 | const char *r_name) | |
582 | { | |
583 | unsigned int i; | |
584 | ||
36e9d67b | 585 | for (i = 0; i < NUM_HOWTOS; i++) |
157090f7 AM |
586 | if (howto_table[i].name != NULL |
587 | && strcasecmp (howto_table[i].name, r_name) == 0) | |
588 | return &howto_table[i]; | |
589 | ||
590 | return NULL; | |
591 | } | |
592 | ||
252b5132 RH |
593 | #define coff_rtype_to_howto coff_i386_rtype_to_howto |
594 | ||
595 | #ifdef TARGET_UNDERSCORE | |
596 | ||
597 | /* If i386 gcc uses underscores for symbol names, then it does not use | |
598 | a leading dot for local labels, so if TARGET_UNDERSCORE is defined | |
599 | we treat all symbols starting with L as local. */ | |
600 | ||
b34976b6 | 601 | static bfd_boolean |
2c3fc389 | 602 | coff_i386_is_local_label_name (bfd *abfd, const char *name) |
252b5132 RH |
603 | { |
604 | if (name[0] == 'L') | |
b34976b6 | 605 | return TRUE; |
252b5132 RH |
606 | |
607 | return _bfd_coff_is_local_label_name (abfd, name); | |
608 | } | |
609 | ||
610 | #define coff_bfd_is_local_label_name coff_i386_is_local_label_name | |
611 | ||
612 | #endif /* TARGET_UNDERSCORE */ | |
613 | ||
614 | #include "coffcode.h" | |
615 | ||
252b5132 RH |
616 | const bfd_target |
617 | #ifdef TARGET_SYM | |
618 | TARGET_SYM = | |
619 | #else | |
6d00b590 | 620 | i386_coff_vec = |
252b5132 RH |
621 | #endif |
622 | { | |
623 | #ifdef TARGET_NAME | |
624 | TARGET_NAME, | |
625 | #else | |
626 | "coff-i386", /* name */ | |
627 | #endif | |
628 | bfd_target_coff_flavour, | |
629 | BFD_ENDIAN_LITTLE, /* data byte order is little */ | |
630 | BFD_ENDIAN_LITTLE, /* header byte order is little */ | |
631 | ||
632 | (HAS_RELOC | EXEC_P | /* object flags */ | |
633 | HAS_LINENO | HAS_DEBUG | | |
a29a8af8 | 634 | HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED | BFD_COMPRESS | BFD_DECOMPRESS ), |
252b5132 | 635 | |
252b5132 | 636 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */ |
6fb72d08 | 637 | #ifdef COFF_WITH_PE |
a29a8af8 | 638 | | SEC_LINK_ONCE | SEC_LINK_DUPLICATES | SEC_READONLY | SEC_DEBUGGING |
252b5132 | 639 | #endif |
a29a8af8 | 640 | | SEC_CODE | SEC_DATA | SEC_EXCLUDE ), |
252b5132 RH |
641 | |
642 | #ifdef TARGET_UNDERSCORE | |
643 | TARGET_UNDERSCORE, /* leading underscore */ | |
644 | #else | |
645 | 0, /* leading underscore */ | |
646 | #endif | |
647 | '/', /* ar_pad_char */ | |
648 | 15, /* ar_max_namelen */ | |
0aabe54e | 649 | 0, /* match priority. */ |
252b5132 RH |
650 | |
651 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
652 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
653 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ | |
654 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
655 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
656 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ | |
657 | ||
5fcfd273 | 658 | /* Note that we allow an object file to be treated as a core file as well. */ |
156f6ad8 JK |
659 | /* bfd_check_format */ |
660 | #ifdef COFF_CHECK_FORMAT | |
661 | {_bfd_dummy_target, COFF_CHECK_FORMAT, | |
662 | bfd_generic_archive_p, COFF_CHECK_FORMAT}, | |
663 | #else | |
664 | {_bfd_dummy_target, coff_object_p, bfd_generic_archive_p, coff_object_p}, | |
665 | #endif | |
252b5132 RH |
666 | {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */ |
667 | bfd_false}, | |
668 | {bfd_false, coff_write_object_contents, /* bfd_write_contents */ | |
669 | _bfd_write_archive_contents, bfd_false}, | |
670 | ||
671 | BFD_JUMP_TABLE_GENERIC (coff), | |
672 | BFD_JUMP_TABLE_COPY (coff), | |
673 | BFD_JUMP_TABLE_CORE (_bfd_nocore), | |
674 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), | |
675 | BFD_JUMP_TABLE_SYMBOLS (coff), | |
676 | BFD_JUMP_TABLE_RELOCS (coff), | |
677 | BFD_JUMP_TABLE_WRITE (coff), | |
678 | BFD_JUMP_TABLE_LINK (coff), | |
679 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
680 | ||
c3c89269 | 681 | NULL, |
b7be1db6 | 682 | |
c3c89269 | 683 | COFF_SWAP_TABLE |
252b5132 | 684 | }; |