Commit | Line | Data |
---|---|---|
17505c5c | 1 | /* BFD back-end for MIPS PE COFF files. |
7898deda | 2 | Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
9553c638 | 3 | 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. |
17505c5c NC |
4 | Modified from coff-i386.c by DJ Delorie, dj@cygnus.com |
5 | ||
6 | This file is part of BFD, the Binary File Descriptor library. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | #define COFF_WITH_PE | |
23 | #define COFF_LONG_SECTION_NAMES | |
b34976b6 | 24 | #define PCRELOFFSET TRUE |
17505c5c NC |
25 | |
26 | #include "bfd.h" | |
27 | #include "sysdep.h" | |
28 | #include "libbfd.h" | |
29 | ||
30 | #include "coff/mipspe.h" | |
31 | ||
32 | #include "coff/internal.h" | |
33 | ||
34 | #include "coff/pe.h" | |
35 | ||
36 | #include "libcoff.h" | |
37 | ||
892339ee | 38 | static bfd_reloc_status_type coff_mips_reloc |
17505c5c NC |
39 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
40 | static reloc_howto_type *coff_mips_rtype_to_howto | |
41 | PARAMS ((bfd *, asection *, struct internal_reloc *, | |
42 | struct coff_link_hash_entry *, struct internal_syment *, | |
17505c5c | 43 | bfd_vma *)); |
42ef282f | 44 | |
b34976b6 AM |
45 | static bfd_boolean in_reloc_p |
46 | PARAMS ((bfd *, reloc_howto_type *)); | |
47 | static reloc_howto_type * coff_mips_reloc_type_lookup | |
48 | PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
49 | static void mips_swap_reloc_in | |
50 | PARAMS ((bfd *, PTR, PTR)); | |
51 | static unsigned int mips_swap_reloc_out | |
52 | PARAMS ((bfd *, PTR, PTR)); | |
53 | static bfd_boolean coff_pe_mips_relocate_section | |
42ef282f NC |
54 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
55 | struct internal_reloc *, struct internal_syment *, asection **)); | |
56 | ||
17505c5c NC |
57 | #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2) |
58 | /* The page size is a guess based on ELF. */ | |
59 | ||
60 | #define COFF_PAGE_SIZE 0x1000 | |
61 | ||
62 | /* For some reason when using mips COFF the value stored in the .text | |
63 | section for a reference to a common symbol is the value itself plus | |
64 | any desired offset. Ian Taylor, Cygnus Support. */ | |
65 | ||
1049f94e | 66 | /* If we are producing relocatable output, we need to do some |
17505c5c NC |
67 | adjustments to the object file that are not done by the |
68 | bfd_perform_relocation function. This function is called by every | |
69 | reloc type to make any required adjustments. */ | |
70 | ||
71 | static bfd_reloc_status_type | |
72 | coff_mips_reloc (abfd, reloc_entry, symbol, data, input_section, output_bfd, | |
73 | error_message) | |
74 | bfd *abfd; | |
75 | arelent *reloc_entry; | |
76 | asymbol *symbol; | |
77 | PTR data; | |
86033394 | 78 | asection *input_section ATTRIBUTE_UNUSED; |
17505c5c | 79 | bfd *output_bfd; |
86033394 | 80 | char **error_message ATTRIBUTE_UNUSED; |
17505c5c NC |
81 | { |
82 | symvalue diff; | |
83 | ||
84 | if (output_bfd == (bfd *) NULL) | |
85 | return bfd_reloc_continue; | |
86 | ||
87 | if (bfd_is_com_section (symbol->section)) | |
88 | { | |
89 | #ifndef COFF_WITH_PE | |
90 | /* We are relocating a common symbol. The current value in the | |
91 | object file is ORIG + OFFSET, where ORIG is the value of the | |
92 | common symbol as seen by the object file when it was compiled | |
93 | (this may be zero if the symbol was undefined) and OFFSET is | |
94 | the offset into the common symbol (normally zero, but may be | |
95 | non-zero when referring to a field in a common structure). | |
96 | ORIG is the negative of reloc_entry->addend, which is set by | |
97 | the CALC_ADDEND macro below. We want to replace the value in | |
98 | the object file with NEW + OFFSET, where NEW is the value of | |
99 | the common symbol which we are going to put in the final | |
100 | object file. NEW is symbol->value. */ | |
101 | diff = symbol->value + reloc_entry->addend; | |
102 | #else | |
103 | /* In PE mode, we do not offset the common symbol. */ | |
104 | diff = reloc_entry->addend; | |
105 | #endif | |
106 | } | |
107 | else | |
108 | { | |
109 | /* For some reason bfd_perform_relocation always effectively | |
110 | ignores the addend for a COFF target when producing | |
1049f94e | 111 | relocatable output. This seems to be always wrong for 386 |
17505c5c NC |
112 | COFF, so we handle the addend here instead. */ |
113 | diff = reloc_entry->addend; | |
114 | } | |
115 | ||
17505c5c NC |
116 | #define DOIT(x) \ |
117 | x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + (diff >> howto->rightshift)) & howto->dst_mask)) | |
118 | ||
119 | if (diff != 0) | |
120 | { | |
121 | reloc_howto_type *howto = reloc_entry->howto; | |
122 | unsigned char *addr = (unsigned char *) data + reloc_entry->address; | |
123 | ||
124 | switch (howto->size) | |
125 | { | |
126 | case 0: | |
127 | { | |
128 | char x = bfd_get_8 (abfd, addr); | |
129 | DOIT (x); | |
130 | bfd_put_8 (abfd, x, addr); | |
131 | } | |
132 | break; | |
133 | ||
134 | case 1: | |
135 | { | |
136 | short x = bfd_get_16 (abfd, addr); | |
137 | DOIT (x); | |
dc810e39 | 138 | bfd_put_16 (abfd, (bfd_vma) x, addr); |
17505c5c NC |
139 | } |
140 | break; | |
141 | ||
142 | case 2: | |
143 | { | |
144 | long x = bfd_get_32 (abfd, addr); | |
145 | DOIT (x); | |
dc810e39 | 146 | bfd_put_32 (abfd, (bfd_vma) x, addr); |
17505c5c NC |
147 | } |
148 | break; | |
149 | ||
150 | default: | |
151 | abort (); | |
152 | } | |
153 | } | |
154 | ||
155 | /* Now let bfd_perform_relocation finish everything up. */ | |
156 | return bfd_reloc_continue; | |
157 | } | |
158 | ||
159 | #ifdef COFF_WITH_PE | |
b34976b6 | 160 | /* Return TRUE if this relocation should |
892339ee | 161 | appear in the output .reloc section. */ |
17505c5c | 162 | |
b34976b6 | 163 | static bfd_boolean |
42ef282f | 164 | in_reloc_p (abfd, howto) |
86033394 | 165 | bfd * abfd ATTRIBUTE_UNUSED; |
17505c5c NC |
166 | reloc_howto_type *howto; |
167 | { | |
168 | return ! howto->pc_relative && howto->type != MIPS_R_RVA; | |
892339ee | 169 | } |
17505c5c NC |
170 | #endif |
171 | ||
172 | #ifndef PCRELOFFSET | |
b34976b6 | 173 | #define PCRELOFFSET FALSE |
17505c5c NC |
174 | #endif |
175 | ||
892339ee | 176 | static reloc_howto_type howto_table[] = |
17505c5c NC |
177 | { |
178 | /* Reloc type 0 is ignored. The reloc reading code ensures that | |
179 | this is a reference to the .abs section, which will cause | |
180 | bfd_perform_relocation to do nothing. */ | |
181 | HOWTO (MIPS_R_ABSOLUTE, /* type */ | |
182 | 0, /* rightshift */ | |
183 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
184 | 8, /* bitsize */ | |
b34976b6 | 185 | FALSE, /* pc_relative */ |
17505c5c NC |
186 | 0, /* bitpos */ |
187 | complain_overflow_dont, /* complain_on_overflow */ | |
188 | 0, /* special_function */ | |
189 | "IGNORE", /* name */ | |
b34976b6 | 190 | FALSE, /* partial_inplace */ |
17505c5c NC |
191 | 0, /* src_mask */ |
192 | 0, /* dst_mask */ | |
b34976b6 | 193 | FALSE), /* pcrel_offset */ |
17505c5c NC |
194 | |
195 | /* A 16 bit reference to a symbol, normally from a data section. */ | |
196 | HOWTO (MIPS_R_REFHALF, /* type */ | |
197 | 0, /* rightshift */ | |
198 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
199 | 16, /* bitsize */ | |
b34976b6 | 200 | FALSE, /* pc_relative */ |
17505c5c NC |
201 | 0, /* bitpos */ |
202 | complain_overflow_bitfield, /* complain_on_overflow */ | |
203 | coff_mips_reloc, /* special_function */ | |
204 | "REFHALF", /* name */ | |
b34976b6 | 205 | TRUE, /* partial_inplace */ |
17505c5c NC |
206 | 0xffff, /* src_mask */ |
207 | 0xffff, /* dst_mask */ | |
b34976b6 | 208 | FALSE), /* pcrel_offset */ |
17505c5c NC |
209 | |
210 | /* A 32 bit reference to a symbol, normally from a data section. */ | |
211 | HOWTO (MIPS_R_REFWORD, /* type */ | |
212 | 0, /* rightshift */ | |
213 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
214 | 32, /* bitsize */ | |
b34976b6 | 215 | FALSE, /* pc_relative */ |
17505c5c NC |
216 | 0, /* bitpos */ |
217 | complain_overflow_bitfield, /* complain_on_overflow */ | |
218 | coff_mips_reloc, /* special_function */ | |
219 | "REFWORD", /* name */ | |
b34976b6 | 220 | TRUE, /* partial_inplace */ |
17505c5c NC |
221 | 0xffffffff, /* src_mask */ |
222 | 0xffffffff, /* dst_mask */ | |
b34976b6 | 223 | FALSE), /* pcrel_offset */ |
17505c5c NC |
224 | |
225 | /* A 26 bit absolute jump address. */ | |
226 | HOWTO (MIPS_R_JMPADDR, /* type */ | |
227 | 2, /* rightshift */ | |
228 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
229 | 26, /* bitsize */ | |
b34976b6 | 230 | FALSE, /* pc_relative */ |
17505c5c NC |
231 | 0, /* bitpos */ |
232 | complain_overflow_dont, /* complain_on_overflow */ | |
233 | /* This needs complex overflow | |
234 | detection, because the upper four | |
235 | bits must match the PC. */ | |
236 | coff_mips_reloc, /* special_function */ | |
237 | "JMPADDR", /* name */ | |
b34976b6 | 238 | TRUE, /* partial_inplace */ |
17505c5c NC |
239 | 0x3ffffff, /* src_mask */ |
240 | 0x3ffffff, /* dst_mask */ | |
b34976b6 | 241 | FALSE), /* pcrel_offset */ |
17505c5c NC |
242 | |
243 | /* The high 16 bits of a symbol value. Handled by the function | |
244 | mips_refhi_reloc. */ | |
245 | HOWTO (MIPS_R_REFHI, /* type */ | |
246 | 16, /* rightshift */ | |
247 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
248 | 16, /* bitsize */ | |
b34976b6 | 249 | FALSE, /* pc_relative */ |
17505c5c NC |
250 | 0, /* bitpos */ |
251 | complain_overflow_bitfield, /* complain_on_overflow */ | |
252 | coff_mips_reloc, /* special_function */ | |
253 | "REFHI", /* name */ | |
b34976b6 | 254 | TRUE, /* partial_inplace */ |
17505c5c NC |
255 | 0xffff, /* src_mask */ |
256 | 0xffff, /* dst_mask */ | |
b34976b6 | 257 | FALSE), /* pcrel_offset */ |
17505c5c NC |
258 | |
259 | /* The low 16 bits of a symbol value. */ | |
260 | HOWTO (MIPS_R_REFLO, /* type */ | |
261 | 0, /* rightshift */ | |
262 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
263 | 16, /* bitsize */ | |
b34976b6 | 264 | FALSE, /* pc_relative */ |
17505c5c NC |
265 | 0, /* bitpos */ |
266 | complain_overflow_dont, /* complain_on_overflow */ | |
267 | coff_mips_reloc, /* special_function */ | |
268 | "REFLO", /* name */ | |
b34976b6 | 269 | TRUE, /* partial_inplace */ |
17505c5c NC |
270 | 0xffff, /* src_mask */ |
271 | 0xffff, /* dst_mask */ | |
b34976b6 | 272 | FALSE), /* pcrel_offset */ |
17505c5c NC |
273 | |
274 | /* A reference to an offset from the gp register. Handled by the | |
275 | function mips_gprel_reloc. */ | |
276 | HOWTO (MIPS_R_GPREL, /* type */ | |
277 | 0, /* rightshift */ | |
278 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
279 | 16, /* bitsize */ | |
b34976b6 | 280 | FALSE, /* pc_relative */ |
17505c5c NC |
281 | 0, /* bitpos */ |
282 | complain_overflow_signed, /* complain_on_overflow */ | |
283 | coff_mips_reloc, /* special_function */ | |
284 | "GPREL", /* name */ | |
b34976b6 | 285 | TRUE, /* partial_inplace */ |
17505c5c NC |
286 | 0xffff, /* src_mask */ |
287 | 0xffff, /* dst_mask */ | |
b34976b6 | 288 | FALSE), /* pcrel_offset */ |
17505c5c NC |
289 | |
290 | /* A reference to a literal using an offset from the gp register. | |
291 | Handled by the function mips_gprel_reloc. */ | |
292 | HOWTO (MIPS_R_LITERAL, /* type */ | |
293 | 0, /* rightshift */ | |
294 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
295 | 16, /* bitsize */ | |
b34976b6 | 296 | FALSE, /* pc_relative */ |
17505c5c NC |
297 | 0, /* bitpos */ |
298 | complain_overflow_signed, /* complain_on_overflow */ | |
299 | coff_mips_reloc, /* special_function */ | |
300 | "LITERAL", /* name */ | |
b34976b6 | 301 | TRUE, /* partial_inplace */ |
17505c5c NC |
302 | 0xffff, /* src_mask */ |
303 | 0xffff, /* dst_mask */ | |
b34976b6 | 304 | FALSE), /* pcrel_offset */ |
17505c5c | 305 | |
86033394 NC |
306 | EMPTY_HOWTO (8), |
307 | EMPTY_HOWTO (9), | |
308 | EMPTY_HOWTO (10), | |
309 | EMPTY_HOWTO (11), | |
310 | EMPTY_HOWTO (12), | |
311 | EMPTY_HOWTO (13), | |
312 | EMPTY_HOWTO (14), | |
313 | EMPTY_HOWTO (15), | |
314 | EMPTY_HOWTO (16), | |
315 | EMPTY_HOWTO (17), | |
316 | EMPTY_HOWTO (18), | |
317 | EMPTY_HOWTO (19), | |
318 | EMPTY_HOWTO (20), | |
319 | EMPTY_HOWTO (21), | |
320 | EMPTY_HOWTO (22), | |
321 | EMPTY_HOWTO (23), | |
322 | EMPTY_HOWTO (24), | |
323 | EMPTY_HOWTO (25), | |
324 | EMPTY_HOWTO (26), | |
325 | EMPTY_HOWTO (27), | |
326 | EMPTY_HOWTO (28), | |
327 | EMPTY_HOWTO (29), | |
328 | EMPTY_HOWTO (30), | |
329 | EMPTY_HOWTO (31), | |
330 | EMPTY_HOWTO (32), | |
331 | EMPTY_HOWTO (33), | |
892339ee KH |
332 | HOWTO (MIPS_R_RVA, /* type */ |
333 | 0, /* rightshift */ | |
334 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
335 | 32, /* bitsize */ | |
b34976b6 | 336 | FALSE, /* pc_relative */ |
892339ee | 337 | 0, /* bitpos */ |
17505c5c | 338 | complain_overflow_bitfield, /* complain_on_overflow */ |
892339ee KH |
339 | coff_mips_reloc, /* special_function */ |
340 | "rva32", /* name */ | |
b34976b6 | 341 | TRUE, /* partial_inplace */ |
892339ee KH |
342 | 0xffffffff, /* src_mask */ |
343 | 0xffffffff, /* dst_mask */ | |
b34976b6 | 344 | FALSE), /* pcrel_offset */ |
86033394 NC |
345 | EMPTY_HOWTO (35), |
346 | EMPTY_HOWTO (36), | |
892339ee KH |
347 | HOWTO (MIPS_R_PAIR, /* type */ |
348 | 0, /* rightshift */ | |
349 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
350 | 32, /* bitsize */ | |
b34976b6 | 351 | FALSE, /* pc_relative */ |
892339ee | 352 | 0, /* bitpos */ |
17505c5c | 353 | complain_overflow_bitfield, /* complain_on_overflow */ |
892339ee KH |
354 | coff_mips_reloc, /* special_function */ |
355 | "PAIR", /* name */ | |
b34976b6 | 356 | TRUE, /* partial_inplace */ |
892339ee KH |
357 | 0xffffffff, /* src_mask */ |
358 | 0xffffffff, /* dst_mask */ | |
b34976b6 | 359 | FALSE), /* pcrel_offset */ |
17505c5c NC |
360 | }; |
361 | ||
362 | /* Turn a howto into a reloc nunmber */ | |
363 | ||
364 | #define SELECT_RELOC(x,howto) { x.r_type = howto->type; } | |
365 | #define BADMAG(x) MIPSBADMAG(x) | |
366 | #define MIPS 1 /* Customize coffcode.h */ | |
367 | ||
368 | #define RTYPE2HOWTO(cache_ptr, dst) \ | |
369 | (cache_ptr)->howto = howto_table + (dst)->r_type; | |
370 | ||
371 | /* Compute the addend of a reloc. If the reloc is to a common symbol, | |
372 | the object file contains the value of the common symbol. By the | |
373 | time this is called, the linker may be using a different symbol | |
374 | from a different object file with a different value. Therefore, we | |
375 | hack wildly to locate the original symbol from this file so that we | |
376 | can make the correct adjustment. This macro sets coffsym to the | |
377 | symbol from the original file, and uses it to set the addend value | |
378 | correctly. If this is not a common symbol, the usual addend | |
379 | calculation is done, except that an additional tweak is needed for | |
380 | PC relative relocs. | |
381 | FIXME: This macro refers to symbols and asect; these are from the | |
382 | calling function, not the macro arguments. */ | |
383 | ||
384 | #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \ | |
385 | { \ | |
386 | coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \ | |
387 | if (ptr && bfd_asymbol_bfd (ptr) != abfd) \ | |
388 | coffsym = (obj_symbols (abfd) \ | |
389 | + (cache_ptr->sym_ptr_ptr - symbols)); \ | |
390 | else if (ptr) \ | |
391 | coffsym = coff_symbol_from (abfd, ptr); \ | |
392 | if (coffsym != (coff_symbol_type *) NULL \ | |
393 | && coffsym->native->u.syment.n_scnum == 0) \ | |
394 | cache_ptr->addend = - coffsym->native->u.syment.n_value; \ | |
395 | else if (ptr && bfd_asymbol_bfd (ptr) == abfd \ | |
396 | && ptr->section != (asection *) NULL) \ | |
397 | cache_ptr->addend = - (ptr->section->vma + ptr->value); \ | |
398 | else \ | |
399 | cache_ptr->addend = 0; \ | |
400 | if (ptr && howto_table[reloc.r_type].pc_relative) \ | |
401 | cache_ptr->addend += asect->vma; \ | |
402 | } | |
403 | ||
17505c5c NC |
404 | /* Convert an rtype to howto for the COFF backend linker. */ |
405 | ||
406 | static reloc_howto_type * | |
407 | coff_mips_rtype_to_howto (abfd, sec, rel, h, sym, addendp) | |
86033394 | 408 | bfd *abfd ATTRIBUTE_UNUSED; |
17505c5c NC |
409 | asection *sec; |
410 | struct internal_reloc *rel; | |
411 | struct coff_link_hash_entry *h; | |
412 | struct internal_syment *sym; | |
413 | bfd_vma *addendp; | |
414 | { | |
415 | ||
416 | reloc_howto_type *howto; | |
417 | ||
418 | howto = howto_table + rel->r_type; | |
419 | ||
420 | #ifdef COFF_WITH_PE | |
421 | *addendp = 0; | |
422 | #endif | |
423 | ||
424 | if (howto->pc_relative) | |
425 | *addendp += sec->vma; | |
426 | ||
427 | if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0) | |
428 | { | |
429 | /* This is a common symbol. The section contents include the | |
430 | size (sym->n_value) as an addend. The relocate_section | |
431 | function will be adding in the final value of the symbol. We | |
432 | need to subtract out the current size in order to get the | |
433 | correct result. */ | |
892339ee | 434 | |
17505c5c NC |
435 | BFD_ASSERT (h != NULL); |
436 | ||
437 | #ifndef COFF_WITH_PE | |
438 | /* I think we *do* want to bypass this. If we don't, I have | |
439 | seen some data parameters get the wrong relocation address. | |
440 | If I link two versions with and without this section bypassed | |
441 | and then do a binary comparison, the addresses which are | |
442 | different can be looked up in the map. The case in which | |
443 | this section has been bypassed has addresses which correspond | |
444 | to values I can find in the map. */ | |
445 | *addendp -= sym->n_value; | |
446 | #endif | |
447 | } | |
448 | ||
449 | #ifndef COFF_WITH_PE | |
450 | /* If the output symbol is common (in which case this must be a | |
1049f94e | 451 | relocatable link), we need to add in the final size of the |
17505c5c | 452 | common symbol. */ |
892339ee | 453 | if (h != NULL && h->root.type == bfd_link_hash_common) |
17505c5c NC |
454 | *addendp += h->root.u.c.size; |
455 | #endif | |
456 | ||
457 | #ifdef COFF_WITH_PE | |
458 | if (howto->pc_relative) | |
459 | { | |
460 | *addendp -= 4; | |
461 | ||
462 | /* If the symbol is defined, then the generic code is going to | |
463 | add back the symbol value in order to cancel out an | |
464 | adjustment it made to the addend. However, we set the addend | |
465 | to 0 at the start of this function. We need to adjust here, | |
466 | to avoid the adjustment the generic code will make. FIXME: | |
467 | This is getting a bit hackish. */ | |
468 | if (sym != NULL && sym->n_scnum != 0) | |
469 | *addendp -= sym->n_value; | |
470 | } | |
471 | ||
472 | if (rel->r_type == MIPS_R_RVA) | |
473 | { | |
474 | *addendp -= pe_data(sec->output_section->owner)->pe_opthdr.ImageBase; | |
475 | } | |
476 | #endif | |
477 | ||
478 | return howto; | |
479 | } | |
480 | ||
481 | #define coff_rtype_to_howto coff_mips_rtype_to_howto | |
482 | ||
17505c5c NC |
483 | #define coff_bfd_reloc_type_lookup coff_mips_reloc_type_lookup |
484 | ||
17505c5c NC |
485 | /* Get the howto structure for a generic reloc type. */ |
486 | ||
487 | static reloc_howto_type * | |
488 | coff_mips_reloc_type_lookup (abfd, code) | |
86033394 | 489 | bfd *abfd ATTRIBUTE_UNUSED; |
17505c5c NC |
490 | bfd_reloc_code_real_type code; |
491 | { | |
492 | int mips_type; | |
493 | ||
494 | switch (code) | |
495 | { | |
496 | case BFD_RELOC_16: | |
497 | mips_type = MIPS_R_REFHALF; | |
498 | break; | |
499 | case BFD_RELOC_32: | |
500 | case BFD_RELOC_CTOR: | |
501 | mips_type = MIPS_R_REFWORD; | |
502 | break; | |
503 | case BFD_RELOC_MIPS_JMP: | |
504 | mips_type = MIPS_R_JMPADDR; | |
505 | break; | |
506 | case BFD_RELOC_HI16_S: | |
507 | mips_type = MIPS_R_REFHI; | |
508 | break; | |
509 | case BFD_RELOC_LO16: | |
510 | mips_type = MIPS_R_REFLO; | |
511 | break; | |
cdf6fd85 | 512 | case BFD_RELOC_GPREL16: |
17505c5c NC |
513 | mips_type = MIPS_R_GPREL; |
514 | break; | |
515 | case BFD_RELOC_MIPS_LITERAL: | |
516 | mips_type = MIPS_R_LITERAL; | |
517 | break; | |
17505c5c NC |
518 | case BFD_RELOC_RVA: |
519 | mips_type = MIPS_R_RVA; | |
520 | break; | |
521 | default: | |
522 | return (reloc_howto_type *) NULL; | |
523 | } | |
524 | ||
525 | return &howto_table[mips_type]; | |
526 | } | |
527 | ||
528 | static void | |
529 | mips_swap_reloc_in (abfd, src, dst) | |
530 | bfd *abfd; | |
531 | PTR src; | |
532 | PTR dst; | |
533 | { | |
534 | static struct internal_reloc pair_prev; | |
535 | RELOC *reloc_src = (RELOC *) src; | |
536 | struct internal_reloc *reloc_dst = (struct internal_reloc *) dst; | |
537 | ||
dc810e39 AM |
538 | reloc_dst->r_vaddr = H_GET_32 (abfd, reloc_src->r_vaddr); |
539 | reloc_dst->r_symndx = H_GET_S32 (abfd, reloc_src->r_symndx); | |
540 | reloc_dst->r_type = H_GET_16 (abfd, reloc_src->r_type); | |
17505c5c NC |
541 | reloc_dst->r_size = 0; |
542 | reloc_dst->r_extern = 0; | |
543 | reloc_dst->r_offset = 0; | |
544 | ||
545 | switch (reloc_dst->r_type) | |
546 | { | |
547 | case MIPS_R_REFHI: | |
548 | pair_prev = *reloc_dst; | |
549 | break; | |
550 | case MIPS_R_PAIR: | |
551 | reloc_dst->r_offset = reloc_dst->r_symndx; | |
552 | if (reloc_dst->r_offset & 0x8000) | |
553 | reloc_dst->r_offset -= 0x10000; | |
892339ee | 554 | /*printf ("dj: pair offset is %08x\n", reloc_dst->r_offset);*/ |
17505c5c NC |
555 | reloc_dst->r_symndx = pair_prev.r_symndx; |
556 | break; | |
557 | } | |
558 | } | |
559 | ||
560 | static unsigned int | |
561 | mips_swap_reloc_out (abfd, src, dst) | |
562 | bfd *abfd; | |
563 | PTR src; | |
564 | PTR dst; | |
565 | { | |
566 | static int prev_offset = 1; | |
567 | static bfd_vma prev_addr = 0; | |
568 | struct internal_reloc *reloc_src = (struct internal_reloc *)src; | |
569 | struct external_reloc *reloc_dst = (struct external_reloc *)dst; | |
570 | ||
571 | switch (reloc_src->r_type) | |
572 | { | |
573 | case MIPS_R_REFHI: | |
574 | prev_addr = reloc_src->r_vaddr; | |
575 | prev_offset = reloc_src->r_offset; | |
576 | break; | |
577 | case MIPS_R_REFLO: | |
578 | if (reloc_src->r_vaddr == prev_addr) | |
579 | { | |
580 | /* FIXME: only slightly hackish. If we see a REFLO pointing to | |
581 | the same address as a REFHI, we assume this is the matching | |
582 | PAIR reloc and output it accordingly. The symndx is really | |
583 | the low 16 bits of the addend */ | |
dc810e39 AM |
584 | H_PUT_32 (abfd, reloc_src->r_vaddr, reloc_dst->r_vaddr); |
585 | H_PUT_32 (abfd, reloc_src->r_symndx, reloc_dst->r_symndx); | |
586 | H_PUT_16 (abfd, MIPS_R_PAIR, reloc_dst->r_type); | |
17505c5c NC |
587 | return RELSZ; |
588 | } | |
589 | break; | |
590 | } | |
591 | ||
dc810e39 AM |
592 | H_PUT_32 (abfd, reloc_src->r_vaddr, reloc_dst->r_vaddr); |
593 | H_PUT_32 (abfd, reloc_src->r_symndx, reloc_dst->r_symndx); | |
17505c5c | 594 | |
dc810e39 | 595 | H_PUT_16 (abfd, reloc_src->r_type, reloc_dst->r_type); |
17505c5c NC |
596 | return RELSZ; |
597 | } | |
598 | ||
599 | #define coff_swap_reloc_in mips_swap_reloc_in | |
600 | #define coff_swap_reloc_out mips_swap_reloc_out | |
601 | #define NO_COFF_RELOCS | |
602 | ||
b34976b6 | 603 | static bfd_boolean |
17505c5c NC |
604 | coff_pe_mips_relocate_section (output_bfd, info, input_bfd, |
605 | input_section, contents, relocs, syms, | |
606 | sections) | |
607 | bfd *output_bfd; | |
608 | struct bfd_link_info *info; | |
609 | bfd *input_bfd; | |
610 | asection *input_section; | |
611 | bfd_byte *contents; | |
612 | struct internal_reloc *relocs; | |
613 | struct internal_syment *syms; | |
614 | asection **sections; | |
615 | { | |
17505c5c | 616 | bfd_vma gp; |
b34976b6 | 617 | bfd_boolean gp_undefined; |
17505c5c | 618 | size_t adjust; |
17505c5c NC |
619 | struct internal_reloc *rel; |
620 | struct internal_reloc *rel_end; | |
621 | unsigned int i; | |
b34976b6 | 622 | bfd_boolean got_lo; |
17505c5c | 623 | |
1049f94e | 624 | if (info->relocatable) |
17505c5c | 625 | { |
d003868e AM |
626 | (*_bfd_error_handler) |
627 | (_("%B: `ld -r' not supported with PE MIPS objects\n"), input_bfd); | |
17505c5c | 628 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 629 | return FALSE; |
17505c5c NC |
630 | } |
631 | ||
632 | BFD_ASSERT (input_bfd->xvec->byteorder | |
633 | == output_bfd->xvec->byteorder); | |
634 | ||
17505c5c NC |
635 | gp = _bfd_get_gp_value (output_bfd); |
636 | if (gp == 0) | |
b34976b6 | 637 | gp_undefined = TRUE; |
17505c5c | 638 | else |
b34976b6 | 639 | gp_undefined = FALSE; |
17505c5c | 640 | |
b34976b6 | 641 | got_lo = FALSE; |
17505c5c NC |
642 | |
643 | adjust = 0; | |
644 | ||
645 | rel = relocs; | |
646 | rel_end = rel + input_section->reloc_count; | |
647 | for (i = 0; rel < rel_end; rel++, i++) | |
648 | { | |
649 | long symndx; | |
650 | struct coff_link_hash_entry *h; | |
651 | struct internal_syment *sym; | |
652 | bfd_vma addend = 0; | |
653 | bfd_vma val, tmp, targ, src, low; | |
654 | reloc_howto_type *howto; | |
17505c5c NC |
655 | unsigned char *mem = contents + rel->r_vaddr; |
656 | ||
657 | symndx = rel->r_symndx; | |
658 | ||
659 | if (symndx == -1) | |
660 | { | |
661 | h = NULL; | |
662 | sym = NULL; | |
663 | } | |
664 | else | |
892339ee | 665 | { |
17505c5c NC |
666 | h = obj_coff_sym_hashes (input_bfd)[symndx]; |
667 | sym = syms + symndx; | |
668 | } | |
669 | ||
670 | /* COFF treats common symbols in one of two ways. Either the | |
671 | size of the symbol is included in the section contents, or it | |
672 | is not. We assume that the size is not included, and force | |
673 | the rtype_to_howto function to adjust the addend as needed. */ | |
674 | ||
675 | if (sym != NULL && sym->n_scnum != 0) | |
676 | addend = - sym->n_value; | |
677 | else | |
678 | addend = 0; | |
679 | ||
17505c5c NC |
680 | howto = bfd_coff_rtype_to_howto (input_bfd, input_section, rel, h, |
681 | sym, &addend); | |
682 | if (howto == NULL) | |
b34976b6 | 683 | return FALSE; |
17505c5c | 684 | |
1049f94e | 685 | /* If we are doing a relocatable link, then we can just ignore |
17505c5c | 686 | a PC relative reloc that is pcrel_offset. It will already |
1049f94e | 687 | have the correct value. If this is not a relocatable link, |
17505c5c NC |
688 | then we should ignore the symbol value. */ |
689 | if (howto->pc_relative && howto->pcrel_offset) | |
690 | { | |
1049f94e | 691 | if (info->relocatable) |
17505c5c NC |
692 | continue; |
693 | if (sym != NULL && sym->n_scnum != 0) | |
694 | addend += sym->n_value; | |
695 | } | |
696 | ||
697 | val = 0; | |
698 | ||
699 | if (h == NULL) | |
700 | { | |
701 | asection *sec; | |
702 | ||
703 | if (symndx == -1) | |
704 | { | |
705 | sec = bfd_abs_section_ptr; | |
706 | val = 0; | |
707 | } | |
708 | else | |
709 | { | |
710 | sec = sections[symndx]; | |
711 | val = (sec->output_section->vma | |
712 | + sec->output_offset | |
713 | + sym->n_value); | |
714 | if (! obj_pe (input_bfd)) | |
715 | val -= sec->vma; | |
716 | } | |
717 | } | |
718 | else | |
719 | { | |
720 | if (h->root.type == bfd_link_hash_defined | |
721 | || h->root.type == bfd_link_hash_defweak) | |
722 | { | |
723 | asection *sec; | |
724 | ||
725 | sec = h->root.u.def.section; | |
726 | val = (h->root.u.def.value | |
727 | + sec->output_section->vma | |
728 | + sec->output_offset); | |
729 | } | |
730 | ||
1049f94e | 731 | else if (! info->relocatable) |
17505c5c NC |
732 | { |
733 | if (! ((*info->callbacks->undefined_symbol) | |
734 | (info, h->root.root.string, input_bfd, input_section, | |
b34976b6 AM |
735 | rel->r_vaddr - input_section->vma, TRUE))) |
736 | return FALSE; | |
17505c5c NC |
737 | } |
738 | } | |
739 | ||
740 | src = rel->r_vaddr + input_section->output_section->vma | |
741 | + input_section->output_offset; | |
17505c5c NC |
742 | |
743 | /* OK, at this point the following variables are set up: | |
744 | src = VMA of the memory we're fixing up | |
745 | mem = pointer to memory we're fixing up | |
746 | val = VMA of what we need to refer to | |
747 | */ | |
748 | ||
d003868e AM |
749 | #define UI(x) (*_bfd_error_handler) (_("%B: unimplemented %s\n"), \ |
750 | input_bfd, x); \ | |
17505c5c NC |
751 | bfd_set_error (bfd_error_bad_value); |
752 | ||
753 | switch (rel->r_type) | |
754 | { | |
755 | case MIPS_R_ABSOLUTE: | |
756 | /* ignore these */ | |
757 | break; | |
758 | ||
759 | case MIPS_R_REFHALF: | |
760 | UI("refhalf"); | |
761 | break; | |
762 | ||
763 | case MIPS_R_REFWORD: | |
764 | tmp = bfd_get_32(input_bfd, mem); | |
892339ee | 765 | /* printf ("refword: src=%08x targ=%08x+%08x\n", src, tmp, val); */ |
17505c5c NC |
766 | tmp += val; |
767 | bfd_put_32(input_bfd, tmp, mem); | |
768 | break; | |
769 | ||
770 | case MIPS_R_JMPADDR: | |
771 | tmp = bfd_get_32(input_bfd, mem); | |
772 | targ = val + (tmp&0x03ffffff)*4; | |
86033394 | 773 | if ((src & 0xf0000000) != (targ & 0xf0000000)) |
17505c5c | 774 | { |
d003868e | 775 | (*_bfd_error_handler) (_("%B: jump too far away\n"), input_bfd); |
17505c5c | 776 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 777 | return FALSE; |
17505c5c NC |
778 | } |
779 | tmp &= 0xfc000000; | |
780 | tmp |= (targ/4) & 0x3ffffff; | |
781 | bfd_put_32(input_bfd, tmp, mem); | |
782 | break; | |
783 | ||
784 | case MIPS_R_REFHI: | |
785 | tmp = bfd_get_32(input_bfd, mem); | |
786 | switch (rel[1].r_type) | |
787 | { | |
788 | case MIPS_R_PAIR: | |
789 | /* MS PE object */ | |
790 | targ = val + rel[1].r_offset + ((tmp & 0xffff) << 16); | |
791 | break; | |
792 | case MIPS_R_REFLO: | |
793 | /* GNU COFF object */ | |
794 | low = bfd_get_32(input_bfd, contents + rel[1].r_vaddr); | |
795 | low &= 0xffff; | |
796 | if (low & 0x8000) | |
797 | low -= 0x10000; | |
798 | targ = val + low + ((tmp & 0xffff) << 16); | |
799 | break; | |
800 | default: | |
d003868e AM |
801 | (*_bfd_error_handler) (_("%B: bad pair/reflo after refhi\n"), |
802 | input_bfd); | |
17505c5c | 803 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 804 | return FALSE; |
17505c5c NC |
805 | } |
806 | tmp &= 0xffff0000; | |
807 | tmp |= (targ >> 16) & 0xffff; | |
808 | bfd_put_32(input_bfd, tmp, mem); | |
809 | break; | |
810 | ||
811 | case MIPS_R_REFLO: | |
812 | tmp = bfd_get_32(input_bfd, mem); | |
813 | targ = val + (tmp & 0xffff); | |
892339ee | 814 | /* printf ("refword: src=%08x targ=%08x\n", src, targ); */ |
17505c5c NC |
815 | tmp &= 0xffff0000; |
816 | tmp |= targ & 0xffff; | |
817 | bfd_put_32(input_bfd, tmp, mem); | |
818 | break; | |
819 | ||
820 | case MIPS_R_GPREL: | |
821 | case MIPS_R_LITERAL: | |
822 | UI("gprel"); | |
823 | break; | |
824 | ||
825 | case MIPS_R_SECTION: | |
826 | UI("section"); | |
827 | break; | |
828 | ||
829 | case MIPS_R_SECREL: | |
830 | UI("secrel"); | |
831 | break; | |
832 | ||
833 | case MIPS_R_SECRELLO: | |
834 | UI("secrello"); | |
835 | break; | |
836 | ||
837 | case MIPS_R_SECRELHI: | |
838 | UI("secrelhi"); | |
839 | break; | |
840 | ||
841 | case MIPS_R_RVA: | |
842 | tmp = bfd_get_32 (input_bfd, mem); | |
892339ee | 843 | /* printf ("rva: src=%08x targ=%08x+%08x\n", src, tmp, val); */ |
17505c5c | 844 | tmp += val |
86033394 | 845 | - pe_data (input_section->output_section->owner)->pe_opthdr.ImageBase; |
17505c5c NC |
846 | bfd_put_32 (input_bfd, tmp, mem); |
847 | break; | |
848 | ||
849 | case MIPS_R_PAIR: | |
850 | /* ignore these */ | |
851 | break; | |
852 | } | |
853 | } | |
854 | ||
b34976b6 | 855 | return TRUE; |
17505c5c NC |
856 | } |
857 | ||
858 | #define coff_relocate_section coff_pe_mips_relocate_section | |
859 | ||
860 | #ifdef TARGET_UNDERSCORE | |
861 | ||
862 | /* If mips gcc uses underscores for symbol names, then it does not use | |
863 | a leading dot for local labels, so if TARGET_UNDERSCORE is defined | |
864 | we treat all symbols starting with L as local. */ | |
865 | ||
b34976b6 AM |
866 | static bfd_boolean coff_mips_is_local_label_name |
867 | PARAMS ((bfd *, const char *)); | |
17505c5c | 868 | |
b34976b6 | 869 | static bfd_boolean |
17505c5c NC |
870 | coff_mips_is_local_label_name (abfd, name) |
871 | bfd *abfd; | |
872 | const char *name; | |
873 | { | |
874 | if (name[0] == 'L') | |
b34976b6 | 875 | return TRUE; |
17505c5c NC |
876 | |
877 | return _bfd_coff_is_local_label_name (abfd, name); | |
878 | } | |
879 | ||
880 | #define coff_bfd_is_local_label_name coff_mips_is_local_label_name | |
881 | ||
882 | #endif /* TARGET_UNDERSCORE */ | |
883 | ||
884 | #define COFF_NO_HACK_SCNHDR_SIZE | |
885 | ||
886 | #include "coffcode.h" | |
887 | ||
888 | const bfd_target | |
889 | #ifdef TARGET_SYM | |
890 | TARGET_SYM = | |
891 | #else | |
892 | mipslpe_vec = | |
893 | #endif | |
894 | { | |
895 | #ifdef TARGET_NAME | |
896 | TARGET_NAME, | |
897 | #else | |
898 | "pe-mips", /* name */ | |
899 | #endif | |
900 | bfd_target_coff_flavour, | |
901 | BFD_ENDIAN_LITTLE, /* data byte order is little */ | |
902 | BFD_ENDIAN_LITTLE, /* header byte order is little */ | |
903 | ||
904 | (HAS_RELOC | EXEC_P | /* object flags */ | |
905 | HAS_LINENO | HAS_DEBUG | | |
906 | HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), | |
907 | ||
908 | #ifndef COFF_WITH_PE | |
909 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */ | |
910 | | SEC_CODE | SEC_DATA), | |
911 | #else | |
912 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */ | |
913 | | SEC_CODE | SEC_DATA | |
914 | | SEC_LINK_ONCE | SEC_LINK_DUPLICATES), | |
915 | #endif | |
916 | ||
917 | #ifdef TARGET_UNDERSCORE | |
918 | TARGET_UNDERSCORE, /* leading underscore */ | |
919 | #else | |
920 | 0, /* leading underscore */ | |
921 | #endif | |
922 | '/', /* ar_pad_char */ | |
923 | 15, /* ar_max_namelen */ | |
924 | ||
925 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
926 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
927 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ | |
928 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
929 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
930 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ | |
931 | ||
892339ee | 932 | /* Note that we allow an object file to be treated as a core file as well. */ |
17505c5c NC |
933 | {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ |
934 | bfd_generic_archive_p, coff_object_p}, | |
935 | {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */ | |
936 | bfd_false}, | |
937 | {bfd_false, coff_write_object_contents, /* bfd_write_contents */ | |
938 | _bfd_write_archive_contents, bfd_false}, | |
939 | ||
940 | BFD_JUMP_TABLE_GENERIC (coff), | |
941 | BFD_JUMP_TABLE_COPY (coff), | |
942 | BFD_JUMP_TABLE_CORE (_bfd_nocore), | |
943 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), | |
944 | BFD_JUMP_TABLE_SYMBOLS (coff), | |
945 | BFD_JUMP_TABLE_RELOCS (coff), | |
946 | BFD_JUMP_TABLE_WRITE (coff), | |
947 | BFD_JUMP_TABLE_LINK (coff), | |
948 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
949 | ||
950 | NULL, | |
892339ee | 951 | |
17505c5c NC |
952 | COFF_SWAP_TABLE |
953 | }; |