Commit | Line | Data |
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252b5132 | 1 | /* BFD back-end for Intel 386 COFF files. |
7898deda | 2 | Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
d1c6de6f | 3 | 2000, 2001, 2002, 2003, 2004 |
252b5132 RH |
4 | Free Software Foundation, Inc. |
5 | Written by Cygnus Support. | |
6 | ||
7 | This file is part of BFD, the Binary File Descriptor library. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
22 | ||
23 | #include "bfd.h" | |
24 | #include "sysdep.h" | |
25 | #include "libbfd.h" | |
26 | ||
27 | #include "coff/i386.h" | |
28 | ||
29 | #include "coff/internal.h" | |
30 | ||
31 | #ifdef COFF_WITH_PE | |
32 | #include "coff/pe.h" | |
33 | #endif | |
34 | ||
35 | #ifdef COFF_GO32_EXE | |
36 | #include "coff/go32exe.h" | |
37 | #endif | |
38 | ||
39 | #include "libcoff.h" | |
40 | ||
b7be1db6 | 41 | static bfd_reloc_status_type coff_i386_reloc |
252b5132 RH |
42 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
43 | static reloc_howto_type *coff_i386_rtype_to_howto | |
44 | PARAMS ((bfd *, asection *, struct internal_reloc *, | |
45 | struct coff_link_hash_entry *, struct internal_syment *, | |
252b5132 | 46 | bfd_vma *)); |
00692651 ILT |
47 | static reloc_howto_type *coff_i386_reloc_type_lookup |
48 | PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
252b5132 RH |
49 | |
50 | #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2) | |
51 | /* The page size is a guess based on ELF. */ | |
52 | ||
53 | #define COFF_PAGE_SIZE 0x1000 | |
54 | ||
55 | /* For some reason when using i386 COFF the value stored in the .text | |
56 | section for a reference to a common symbol is the value itself plus | |
57 | any desired offset. Ian Taylor, Cygnus Support. */ | |
58 | ||
1049f94e | 59 | /* If we are producing relocatable output, we need to do some |
252b5132 RH |
60 | adjustments to the object file that are not done by the |
61 | bfd_perform_relocation function. This function is called by every | |
62 | reloc type to make any required adjustments. */ | |
63 | ||
64 | static bfd_reloc_status_type | |
65 | coff_i386_reloc (abfd, reloc_entry, symbol, data, input_section, output_bfd, | |
66 | error_message) | |
67 | bfd *abfd; | |
68 | arelent *reloc_entry; | |
69 | asymbol *symbol; | |
70 | PTR data; | |
5f771d47 | 71 | asection *input_section ATTRIBUTE_UNUSED; |
252b5132 | 72 | bfd *output_bfd; |
5f771d47 | 73 | char **error_message ATTRIBUTE_UNUSED; |
252b5132 RH |
74 | { |
75 | symvalue diff; | |
76 | ||
689be717 | 77 | #ifndef COFF_WITH_PE |
252b5132 RH |
78 | if (output_bfd == (bfd *) NULL) |
79 | return bfd_reloc_continue; | |
689be717 | 80 | #endif |
252b5132 RH |
81 | |
82 | if (bfd_is_com_section (symbol->section)) | |
83 | { | |
84 | #ifndef COFF_WITH_PE | |
85 | /* We are relocating a common symbol. The current value in the | |
86 | object file is ORIG + OFFSET, where ORIG is the value of the | |
87 | common symbol as seen by the object file when it was compiled | |
88 | (this may be zero if the symbol was undefined) and OFFSET is | |
89 | the offset into the common symbol (normally zero, but may be | |
90 | non-zero when referring to a field in a common structure). | |
91 | ORIG is the negative of reloc_entry->addend, which is set by | |
92 | the CALC_ADDEND macro below. We want to replace the value in | |
93 | the object file with NEW + OFFSET, where NEW is the value of | |
94 | the common symbol which we are going to put in the final | |
95 | object file. NEW is symbol->value. */ | |
96 | diff = symbol->value + reloc_entry->addend; | |
97 | #else | |
98 | /* In PE mode, we do not offset the common symbol. */ | |
99 | diff = reloc_entry->addend; | |
100 | #endif | |
101 | } | |
102 | else | |
103 | { | |
104 | /* For some reason bfd_perform_relocation always effectively | |
105 | ignores the addend for a COFF target when producing | |
1049f94e | 106 | relocatable output. This seems to be always wrong for 386 |
252b5132 | 107 | COFF, so we handle the addend here instead. */ |
689be717 L |
108 | #ifdef COFF_WITH_PE |
109 | if (output_bfd == (bfd *) NULL) | |
110 | { | |
111 | reloc_howto_type *howto = reloc_entry->howto; | |
112 | ||
113 | /* Although PC relative relocations are very similar between | |
114 | PE and non-PE formats, but they are off by 1 << howto->size | |
115 | bytes. For the external relocation, PE is very different | |
116 | from others. See md_apply_fix3 () in gas/config/tc-i386.c. | |
117 | When we link PE and non-PE object files together to | |
118 | generate a non-PE executable, we have to compensate it | |
119 | here. */ | |
82e51918 | 120 | if (howto->pc_relative && howto->pcrel_offset) |
689be717 L |
121 | diff = -(1 << howto->size); |
122 | else | |
123 | diff = -reloc_entry->addend; | |
124 | } | |
125 | else | |
126 | #endif | |
127 | diff = reloc_entry->addend; | |
252b5132 RH |
128 | } |
129 | ||
130 | #ifdef COFF_WITH_PE | |
131 | /* FIXME: How should this case be handled? */ | |
8e191bd3 ILT |
132 | if (reloc_entry->howto->type == R_IMAGEBASE |
133 | && output_bfd != NULL | |
134 | && bfd_get_flavour(output_bfd) == bfd_target_coff_flavour) | |
00692651 | 135 | diff -= pe_data (output_bfd)->pe_opthdr.ImageBase; |
252b5132 RH |
136 | #endif |
137 | ||
138 | #define DOIT(x) \ | |
139 | x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + diff) & howto->dst_mask)) | |
140 | ||
141 | if (diff != 0) | |
142 | { | |
143 | reloc_howto_type *howto = reloc_entry->howto; | |
144 | unsigned char *addr = (unsigned char *) data + reloc_entry->address; | |
145 | ||
146 | switch (howto->size) | |
147 | { | |
148 | case 0: | |
149 | { | |
150 | char x = bfd_get_8 (abfd, addr); | |
151 | DOIT (x); | |
152 | bfd_put_8 (abfd, x, addr); | |
153 | } | |
154 | break; | |
155 | ||
156 | case 1: | |
157 | { | |
158 | short x = bfd_get_16 (abfd, addr); | |
159 | DOIT (x); | |
dc810e39 | 160 | bfd_put_16 (abfd, (bfd_vma) x, addr); |
252b5132 RH |
161 | } |
162 | break; | |
163 | ||
164 | case 2: | |
165 | { | |
166 | long x = bfd_get_32 (abfd, addr); | |
167 | DOIT (x); | |
dc810e39 | 168 | bfd_put_32 (abfd, (bfd_vma) x, addr); |
252b5132 RH |
169 | } |
170 | break; | |
171 | ||
172 | default: | |
173 | abort (); | |
174 | } | |
175 | } | |
176 | ||
177 | /* Now let bfd_perform_relocation finish everything up. */ | |
178 | return bfd_reloc_continue; | |
179 | } | |
180 | ||
181 | #ifdef COFF_WITH_PE | |
b34976b6 | 182 | /* Return TRUE if this relocation should appear in the output .reloc |
6fb72d08 ILT |
183 | section. */ |
184 | ||
b34976b6 | 185 | static bfd_boolean in_reloc_p PARAMS ((bfd *, reloc_howto_type *)); |
6fb72d08 | 186 | |
b34976b6 | 187 | static bfd_boolean in_reloc_p (abfd, howto) |
60bcf0fa | 188 | bfd * abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
189 | reloc_howto_type *howto; |
190 | { | |
191 | return ! howto->pc_relative && howto->type != R_IMAGEBASE; | |
b7be1db6 | 192 | } |
6fb72d08 | 193 | #endif /* COFF_WITH_PE */ |
252b5132 RH |
194 | |
195 | #ifndef PCRELOFFSET | |
b34976b6 | 196 | #define PCRELOFFSET FALSE |
252b5132 RH |
197 | #endif |
198 | ||
b7be1db6 | 199 | static reloc_howto_type howto_table[] = |
252b5132 | 200 | { |
5f771d47 ILT |
201 | EMPTY_HOWTO (0), |
202 | EMPTY_HOWTO (1), | |
203 | EMPTY_HOWTO (2), | |
204 | EMPTY_HOWTO (3), | |
205 | EMPTY_HOWTO (4), | |
206 | EMPTY_HOWTO (5), | |
b7be1db6 AM |
207 | HOWTO (R_DIR32, /* type */ |
208 | 0, /* rightshift */ | |
209 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
210 | 32, /* bitsize */ | |
b34976b6 | 211 | FALSE, /* pc_relative */ |
b7be1db6 | 212 | 0, /* bitpos */ |
252b5132 | 213 | complain_overflow_bitfield, /* complain_on_overflow */ |
b7be1db6 AM |
214 | coff_i386_reloc, /* special_function */ |
215 | "dir32", /* name */ | |
b34976b6 | 216 | TRUE, /* partial_inplace */ |
b7be1db6 AM |
217 | 0xffffffff, /* src_mask */ |
218 | 0xffffffff, /* dst_mask */ | |
b34976b6 | 219 | TRUE), /* pcrel_offset */ |
b7be1db6 AM |
220 | /* PE IMAGE_REL_I386_DIR32NB relocation (7). */ |
221 | HOWTO (R_IMAGEBASE, /* type */ | |
222 | 0, /* rightshift */ | |
223 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
224 | 32, /* bitsize */ | |
b34976b6 | 225 | FALSE, /* pc_relative */ |
b7be1db6 | 226 | 0, /* bitpos */ |
252b5132 | 227 | complain_overflow_bitfield, /* complain_on_overflow */ |
b7be1db6 AM |
228 | coff_i386_reloc, /* special_function */ |
229 | "rva32", /* name */ | |
b34976b6 | 230 | TRUE, /* partial_inplace */ |
b7be1db6 AM |
231 | 0xffffffff, /* src_mask */ |
232 | 0xffffffff, /* dst_mask */ | |
b34976b6 | 233 | FALSE), /* pcrel_offset */ |
5f771d47 ILT |
234 | EMPTY_HOWTO (010), |
235 | EMPTY_HOWTO (011), | |
236 | EMPTY_HOWTO (012), | |
6482c264 NC |
237 | #ifdef COFF_WITH_PE |
238 | /* 32-bit longword section relative relocation (013). */ | |
239 | HOWTO (R_SECREL32, /* type */ | |
240 | 0, /* rightshift */ | |
241 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
242 | 32, /* bitsize */ | |
243 | FALSE, /* pc_relative */ | |
244 | 0, /* bitpos */ | |
245 | complain_overflow_bitfield, /* complain_on_overflow */ | |
246 | coff_i386_reloc, /* special_function */ | |
247 | "secrel32", /* name */ | |
248 | TRUE, /* partial_inplace */ | |
249 | 0xffffffff, /* src_mask */ | |
250 | 0xffffffff, /* dst_mask */ | |
251 | TRUE), /* pcrel_offset */ | |
252 | #else | |
5f771d47 | 253 | EMPTY_HOWTO (013), |
6482c264 | 254 | #endif |
5f771d47 ILT |
255 | EMPTY_HOWTO (014), |
256 | EMPTY_HOWTO (015), | |
257 | EMPTY_HOWTO (016), | |
00692651 ILT |
258 | /* Byte relocation (017). */ |
259 | HOWTO (R_RELBYTE, /* type */ | |
b7be1db6 AM |
260 | 0, /* rightshift */ |
261 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
262 | 8, /* bitsize */ | |
b34976b6 | 263 | FALSE, /* pc_relative */ |
b7be1db6 | 264 | 0, /* bitpos */ |
252b5132 | 265 | complain_overflow_bitfield, /* complain_on_overflow */ |
b7be1db6 AM |
266 | coff_i386_reloc, /* special_function */ |
267 | "8", /* name */ | |
b34976b6 | 268 | TRUE, /* partial_inplace */ |
b7be1db6 AM |
269 | 0x000000ff, /* src_mask */ |
270 | 0x000000ff, /* dst_mask */ | |
252b5132 | 271 | PCRELOFFSET), /* pcrel_offset */ |
00692651 | 272 | /* 16-bit word relocation (020). */ |
b7be1db6 AM |
273 | HOWTO (R_RELWORD, /* type */ |
274 | 0, /* rightshift */ | |
275 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
276 | 16, /* bitsize */ | |
b34976b6 | 277 | FALSE, /* pc_relative */ |
b7be1db6 | 278 | 0, /* bitpos */ |
252b5132 | 279 | complain_overflow_bitfield, /* complain_on_overflow */ |
b7be1db6 AM |
280 | coff_i386_reloc, /* special_function */ |
281 | "16", /* name */ | |
b34976b6 | 282 | TRUE, /* partial_inplace */ |
b7be1db6 AM |
283 | 0x0000ffff, /* src_mask */ |
284 | 0x0000ffff, /* dst_mask */ | |
252b5132 | 285 | PCRELOFFSET), /* pcrel_offset */ |
b7be1db6 AM |
286 | /* 32-bit longword relocation (021). */ |
287 | HOWTO (R_RELLONG, /* type */ | |
288 | 0, /* rightshift */ | |
289 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
290 | 32, /* bitsize */ | |
b34976b6 | 291 | FALSE, /* pc_relative */ |
b7be1db6 | 292 | 0, /* bitpos */ |
252b5132 | 293 | complain_overflow_bitfield, /* complain_on_overflow */ |
b7be1db6 AM |
294 | coff_i386_reloc, /* special_function */ |
295 | "32", /* name */ | |
b34976b6 | 296 | TRUE, /* partial_inplace */ |
b7be1db6 AM |
297 | 0xffffffff, /* src_mask */ |
298 | 0xffffffff, /* dst_mask */ | |
252b5132 | 299 | PCRELOFFSET), /* pcrel_offset */ |
b7be1db6 AM |
300 | /* Byte PC relative relocation (022). */ |
301 | HOWTO (R_PCRBYTE, /* type */ | |
302 | 0, /* rightshift */ | |
303 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
304 | 8, /* bitsize */ | |
b34976b6 | 305 | TRUE, /* pc_relative */ |
b7be1db6 | 306 | 0, /* bitpos */ |
252b5132 | 307 | complain_overflow_signed, /* complain_on_overflow */ |
b7be1db6 AM |
308 | coff_i386_reloc, /* special_function */ |
309 | "DISP8", /* name */ | |
b34976b6 | 310 | TRUE, /* partial_inplace */ |
b7be1db6 AM |
311 | 0x000000ff, /* src_mask */ |
312 | 0x000000ff, /* dst_mask */ | |
252b5132 | 313 | PCRELOFFSET), /* pcrel_offset */ |
b7be1db6 AM |
314 | /* 16-bit word PC relative relocation (023). */ |
315 | HOWTO (R_PCRWORD, /* type */ | |
316 | 0, /* rightshift */ | |
317 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
318 | 16, /* bitsize */ | |
b34976b6 | 319 | TRUE, /* pc_relative */ |
b7be1db6 | 320 | 0, /* bitpos */ |
252b5132 | 321 | complain_overflow_signed, /* complain_on_overflow */ |
b7be1db6 AM |
322 | coff_i386_reloc, /* special_function */ |
323 | "DISP16", /* name */ | |
b34976b6 | 324 | TRUE, /* partial_inplace */ |
b7be1db6 AM |
325 | 0x0000ffff, /* src_mask */ |
326 | 0x0000ffff, /* dst_mask */ | |
252b5132 | 327 | PCRELOFFSET), /* pcrel_offset */ |
00692651 | 328 | /* 32-bit longword PC relative relocation (024). */ |
b7be1db6 AM |
329 | HOWTO (R_PCRLONG, /* type */ |
330 | 0, /* rightshift */ | |
331 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
332 | 32, /* bitsize */ | |
b34976b6 | 333 | TRUE, /* pc_relative */ |
b7be1db6 | 334 | 0, /* bitpos */ |
252b5132 | 335 | complain_overflow_signed, /* complain_on_overflow */ |
b7be1db6 AM |
336 | coff_i386_reloc, /* special_function */ |
337 | "DISP32", /* name */ | |
b34976b6 | 338 | TRUE, /* partial_inplace */ |
b7be1db6 AM |
339 | 0xffffffff, /* src_mask */ |
340 | 0xffffffff, /* dst_mask */ | |
252b5132 RH |
341 | PCRELOFFSET) /* pcrel_offset */ |
342 | }; | |
343 | ||
344 | /* Turn a howto into a reloc nunmber */ | |
345 | ||
346 | #define SELECT_RELOC(x,howto) { x.r_type = howto->type; } | |
347 | #define BADMAG(x) I386BADMAG(x) | |
348 | #define I386 1 /* Customize coffcode.h */ | |
349 | ||
00692651 ILT |
350 | #define RTYPE2HOWTO(cache_ptr, dst) \ |
351 | ((cache_ptr)->howto = \ | |
352 | ((dst)->r_type < sizeof (howto_table) / sizeof (howto_table[0]) \ | |
353 | ? howto_table + (dst)->r_type \ | |
354 | : NULL)) | |
252b5132 RH |
355 | |
356 | /* For 386 COFF a STYP_NOLOAD | STYP_BSS section is part of a shared | |
357 | library. On some other COFF targets STYP_BSS is normally | |
358 | STYP_NOLOAD. */ | |
359 | #define BSS_NOLOAD_IS_SHARED_LIBRARY | |
360 | ||
361 | /* Compute the addend of a reloc. If the reloc is to a common symbol, | |
362 | the object file contains the value of the common symbol. By the | |
363 | time this is called, the linker may be using a different symbol | |
364 | from a different object file with a different value. Therefore, we | |
365 | hack wildly to locate the original symbol from this file so that we | |
366 | can make the correct adjustment. This macro sets coffsym to the | |
367 | symbol from the original file, and uses it to set the addend value | |
368 | correctly. If this is not a common symbol, the usual addend | |
369 | calculation is done, except that an additional tweak is needed for | |
370 | PC relative relocs. | |
371 | FIXME: This macro refers to symbols and asect; these are from the | |
372 | calling function, not the macro arguments. */ | |
373 | ||
374 | #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \ | |
375 | { \ | |
376 | coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \ | |
377 | if (ptr && bfd_asymbol_bfd (ptr) != abfd) \ | |
378 | coffsym = (obj_symbols (abfd) \ | |
379 | + (cache_ptr->sym_ptr_ptr - symbols)); \ | |
380 | else if (ptr) \ | |
381 | coffsym = coff_symbol_from (abfd, ptr); \ | |
382 | if (coffsym != (coff_symbol_type *) NULL \ | |
383 | && coffsym->native->u.syment.n_scnum == 0) \ | |
384 | cache_ptr->addend = - coffsym->native->u.syment.n_value; \ | |
385 | else if (ptr && bfd_asymbol_bfd (ptr) == abfd \ | |
386 | && ptr->section != (asection *) NULL) \ | |
387 | cache_ptr->addend = - (ptr->section->vma + ptr->value); \ | |
388 | else \ | |
389 | cache_ptr->addend = 0; \ | |
390 | if (ptr && howto_table[reloc.r_type].pc_relative) \ | |
391 | cache_ptr->addend += asect->vma; \ | |
392 | } | |
393 | ||
394 | /* We use the special COFF backend linker. For normal i386 COFF, we | |
395 | can use the generic relocate_section routine. For PE, we need our | |
396 | own routine. */ | |
397 | ||
398 | #ifndef COFF_WITH_PE | |
399 | ||
400 | #define coff_relocate_section _bfd_coff_generic_relocate_section | |
401 | ||
402 | #else /* COFF_WITH_PE */ | |
403 | ||
404 | /* The PE relocate section routine. The only difference between this | |
405 | and the regular routine is that we don't want to do anything for a | |
1049f94e | 406 | relocatable link. */ |
252b5132 | 407 | |
b34976b6 | 408 | static bfd_boolean coff_pe_i386_relocate_section |
252b5132 RH |
409 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
410 | struct internal_reloc *, struct internal_syment *, asection **)); | |
411 | ||
b34976b6 | 412 | static bfd_boolean |
252b5132 RH |
413 | coff_pe_i386_relocate_section (output_bfd, info, input_bfd, |
414 | input_section, contents, relocs, syms, | |
415 | sections) | |
416 | bfd *output_bfd; | |
417 | struct bfd_link_info *info; | |
418 | bfd *input_bfd; | |
419 | asection *input_section; | |
420 | bfd_byte *contents; | |
421 | struct internal_reloc *relocs; | |
422 | struct internal_syment *syms; | |
423 | asection **sections; | |
424 | { | |
1049f94e | 425 | if (info->relocatable) |
b34976b6 | 426 | return TRUE; |
252b5132 RH |
427 | |
428 | return _bfd_coff_generic_relocate_section (output_bfd, info, input_bfd, | |
429 | input_section, contents, | |
430 | relocs, syms, sections); | |
431 | } | |
432 | ||
433 | #define coff_relocate_section coff_pe_i386_relocate_section | |
434 | ||
435 | #endif /* COFF_WITH_PE */ | |
436 | ||
437 | /* Convert an rtype to howto for the COFF backend linker. */ | |
438 | ||
439 | static reloc_howto_type * | |
440 | coff_i386_rtype_to_howto (abfd, sec, rel, h, sym, addendp) | |
5f771d47 | 441 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
442 | asection *sec; |
443 | struct internal_reloc *rel; | |
444 | struct coff_link_hash_entry *h; | |
445 | struct internal_syment *sym; | |
446 | bfd_vma *addendp; | |
447 | { | |
252b5132 RH |
448 | reloc_howto_type *howto; |
449 | ||
00692651 ILT |
450 | if (rel->r_type > sizeof (howto_table) / sizeof (howto_table[0])) |
451 | { | |
452 | bfd_set_error (bfd_error_bad_value); | |
453 | return NULL; | |
454 | } | |
455 | ||
252b5132 RH |
456 | howto = howto_table + rel->r_type; |
457 | ||
458 | #ifdef COFF_WITH_PE | |
00692651 | 459 | /* Cancel out code in _bfd_coff_generic_relocate_section. */ |
252b5132 RH |
460 | *addendp = 0; |
461 | #endif | |
462 | ||
463 | if (howto->pc_relative) | |
464 | *addendp += sec->vma; | |
465 | ||
466 | if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0) | |
467 | { | |
468 | /* This is a common symbol. The section contents include the | |
469 | size (sym->n_value) as an addend. The relocate_section | |
470 | function will be adding in the final value of the symbol. We | |
471 | need to subtract out the current size in order to get the | |
472 | correct result. */ | |
b7be1db6 | 473 | |
252b5132 RH |
474 | BFD_ASSERT (h != NULL); |
475 | ||
476 | #ifndef COFF_WITH_PE | |
477 | /* I think we *do* want to bypass this. If we don't, I have | |
478 | seen some data parameters get the wrong relocation address. | |
479 | If I link two versions with and without this section bypassed | |
480 | and then do a binary comparison, the addresses which are | |
481 | different can be looked up in the map. The case in which | |
482 | this section has been bypassed has addresses which correspond | |
483 | to values I can find in the map. */ | |
484 | *addendp -= sym->n_value; | |
485 | #endif | |
486 | } | |
487 | ||
488 | #ifndef COFF_WITH_PE | |
489 | /* If the output symbol is common (in which case this must be a | |
1049f94e | 490 | relocatable link), we need to add in the final size of the |
252b5132 | 491 | common symbol. */ |
b7be1db6 | 492 | if (h != NULL && h->root.type == bfd_link_hash_common) |
252b5132 RH |
493 | *addendp += h->root.u.c.size; |
494 | #endif | |
495 | ||
496 | #ifdef COFF_WITH_PE | |
497 | if (howto->pc_relative) | |
498 | { | |
499 | *addendp -= 4; | |
500 | ||
501 | /* If the symbol is defined, then the generic code is going to | |
502 | add back the symbol value in order to cancel out an | |
503 | adjustment it made to the addend. However, we set the addend | |
504 | to 0 at the start of this function. We need to adjust here, | |
505 | to avoid the adjustment the generic code will make. FIXME: | |
506 | This is getting a bit hackish. */ | |
507 | if (sym != NULL && sym->n_scnum != 0) | |
508 | *addendp -= sym->n_value; | |
509 | } | |
510 | ||
8e191bd3 ILT |
511 | if (rel->r_type == R_IMAGEBASE |
512 | && (bfd_get_flavour(sec->output_section->owner) | |
513 | == bfd_target_coff_flavour)) | |
252b5132 RH |
514 | { |
515 | *addendp -= pe_data(sec->output_section->owner)->pe_opthdr.ImageBase; | |
516 | } | |
6482c264 NC |
517 | |
518 | if (rel->r_type == R_SECREL32) | |
519 | { | |
520 | bfd_vma osect_vma; | |
521 | ||
522 | if (h && (h->type == bfd_link_hash_defined | |
523 | || h->type == bfd_link_hash_defweak)) | |
524 | osect_vma = h->root.u.def.section->output_section->vma; | |
525 | else | |
526 | { | |
527 | asection *sec; | |
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 | ||
533 | for (sec = abfd->sections, i = 1; i < sym->n_scnum; i++) | |
534 | sec = sec->next; | |
535 | ||
536 | osect_vma = sec->output_section->vma; | |
537 | } | |
538 | ||
539 | *addendp -= osect_vma; | |
540 | } | |
252b5132 RH |
541 | #endif |
542 | ||
543 | return howto; | |
544 | } | |
545 | ||
252b5132 RH |
546 | #define coff_bfd_reloc_type_lookup coff_i386_reloc_type_lookup |
547 | ||
252b5132 RH |
548 | static reloc_howto_type * |
549 | coff_i386_reloc_type_lookup (abfd, code) | |
5f771d47 | 550 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
551 | bfd_reloc_code_real_type code; |
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 | ||
579 | #define coff_rtype_to_howto coff_i386_rtype_to_howto | |
580 | ||
581 | #ifdef TARGET_UNDERSCORE | |
582 | ||
583 | /* If i386 gcc uses underscores for symbol names, then it does not use | |
584 | a leading dot for local labels, so if TARGET_UNDERSCORE is defined | |
585 | we treat all symbols starting with L as local. */ | |
586 | ||
b34976b6 AM |
587 | static bfd_boolean coff_i386_is_local_label_name |
588 | PARAMS ((bfd *, const char *)); | |
252b5132 | 589 | |
b34976b6 | 590 | static bfd_boolean |
252b5132 RH |
591 | coff_i386_is_local_label_name (abfd, name) |
592 | bfd *abfd; | |
593 | const char *name; | |
594 | { | |
595 | if (name[0] == 'L') | |
b34976b6 | 596 | return TRUE; |
252b5132 RH |
597 | |
598 | return _bfd_coff_is_local_label_name (abfd, name); | |
599 | } | |
600 | ||
601 | #define coff_bfd_is_local_label_name coff_i386_is_local_label_name | |
602 | ||
603 | #endif /* TARGET_UNDERSCORE */ | |
604 | ||
605 | #include "coffcode.h" | |
606 | ||
252b5132 RH |
607 | const bfd_target |
608 | #ifdef TARGET_SYM | |
609 | TARGET_SYM = | |
610 | #else | |
611 | i386coff_vec = | |
612 | #endif | |
613 | { | |
614 | #ifdef TARGET_NAME | |
615 | TARGET_NAME, | |
616 | #else | |
617 | "coff-i386", /* name */ | |
618 | #endif | |
619 | bfd_target_coff_flavour, | |
620 | BFD_ENDIAN_LITTLE, /* data byte order is little */ | |
621 | BFD_ENDIAN_LITTLE, /* header byte order is little */ | |
622 | ||
623 | (HAS_RELOC | EXEC_P | /* object flags */ | |
624 | HAS_LINENO | HAS_DEBUG | | |
625 | HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), | |
626 | ||
252b5132 | 627 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */ |
6fb72d08 | 628 | #ifdef COFF_WITH_PE |
baf80c32 | 629 | | SEC_LINK_ONCE | SEC_LINK_DUPLICATES | SEC_READONLY |
252b5132 | 630 | #endif |
6fb72d08 | 631 | | SEC_CODE | SEC_DATA), |
252b5132 RH |
632 | |
633 | #ifdef TARGET_UNDERSCORE | |
634 | TARGET_UNDERSCORE, /* leading underscore */ | |
635 | #else | |
636 | 0, /* leading underscore */ | |
637 | #endif | |
638 | '/', /* ar_pad_char */ | |
639 | 15, /* ar_max_namelen */ | |
640 | ||
641 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
642 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
643 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ | |
644 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
645 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
646 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ | |
647 | ||
5fcfd273 | 648 | /* Note that we allow an object file to be treated as a core file as well. */ |
cb665cd3 NC |
649 | {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ |
650 | bfd_generic_archive_p, coff_object_p}, | |
252b5132 RH |
651 | {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */ |
652 | bfd_false}, | |
653 | {bfd_false, coff_write_object_contents, /* bfd_write_contents */ | |
654 | _bfd_write_archive_contents, bfd_false}, | |
655 | ||
656 | BFD_JUMP_TABLE_GENERIC (coff), | |
657 | BFD_JUMP_TABLE_COPY (coff), | |
658 | BFD_JUMP_TABLE_CORE (_bfd_nocore), | |
659 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), | |
660 | BFD_JUMP_TABLE_SYMBOLS (coff), | |
661 | BFD_JUMP_TABLE_RELOCS (coff), | |
662 | BFD_JUMP_TABLE_WRITE (coff), | |
663 | BFD_JUMP_TABLE_LINK (coff), | |
664 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
665 | ||
c3c89269 | 666 | NULL, |
b7be1db6 | 667 | |
c3c89269 | 668 | COFF_SWAP_TABLE |
252b5132 | 669 | }; |