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17505c5c NC |
1 | /* BFD back-end for MIPS PE COFF files. |
2 | Copyright (C) 1990, 91, 92, 93, 94, 95, 96, 97, 98, 99, 2000 Free Software Foundation, Inc. | |
3 | Modified from coff-i386.c by DJ Delorie, dj@cygnus.com | |
4 | ||
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
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 | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
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. | |
16 | ||
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 | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | #define COFF_WITH_PE | |
22 | #define COFF_LONG_SECTION_NAMES | |
23 | #define PCRELOFFSET true | |
24 | ||
25 | #include "bfd.h" | |
26 | #include "sysdep.h" | |
27 | #include "libbfd.h" | |
28 | ||
29 | #include "coff/mipspe.h" | |
30 | ||
31 | #include "coff/internal.h" | |
32 | ||
33 | #include "coff/pe.h" | |
34 | ||
35 | #include "libcoff.h" | |
36 | ||
37 | static bfd_reloc_status_type coff_mips_reloc | |
38 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
39 | static reloc_howto_type *coff_mips_rtype_to_howto | |
40 | PARAMS ((bfd *, asection *, struct internal_reloc *, | |
41 | struct coff_link_hash_entry *, struct internal_syment *, | |
42 | ||
43 | bfd_vma *)); | |
86033394 | 44 | #if 0 |
17505c5c NC |
45 | static void mips_ecoff_swap_reloc_in PARAMS ((bfd *, PTR, |
46 | struct internal_reloc *)); | |
47 | static void mips_ecoff_swap_reloc_out PARAMS ((bfd *, | |
48 | const struct internal_reloc *, | |
49 | PTR)); | |
50 | static void mips_adjust_reloc_in PARAMS ((bfd *, | |
51 | const struct internal_reloc *, | |
52 | arelent *)); | |
53 | static void mips_adjust_reloc_out PARAMS ((bfd *, const arelent *, | |
54 | struct internal_reloc *)); | |
86033394 | 55 | #endif |
17505c5c NC |
56 | #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2) |
57 | /* The page size is a guess based on ELF. */ | |
58 | ||
59 | #define COFF_PAGE_SIZE 0x1000 | |
60 | ||
61 | /* For some reason when using mips COFF the value stored in the .text | |
62 | section for a reference to a common symbol is the value itself plus | |
63 | any desired offset. Ian Taylor, Cygnus Support. */ | |
64 | ||
65 | /* If we are producing relocateable output, we need to do some | |
66 | adjustments to the object file that are not done by the | |
67 | bfd_perform_relocation function. This function is called by every | |
68 | reloc type to make any required adjustments. */ | |
69 | ||
70 | static bfd_reloc_status_type | |
71 | coff_mips_reloc (abfd, reloc_entry, symbol, data, input_section, output_bfd, | |
72 | error_message) | |
73 | bfd *abfd; | |
74 | arelent *reloc_entry; | |
75 | asymbol *symbol; | |
76 | PTR data; | |
86033394 | 77 | asection *input_section ATTRIBUTE_UNUSED; |
17505c5c | 78 | bfd *output_bfd; |
86033394 | 79 | char **error_message ATTRIBUTE_UNUSED; |
17505c5c NC |
80 | { |
81 | symvalue diff; | |
82 | ||
83 | if (output_bfd == (bfd *) NULL) | |
84 | return bfd_reloc_continue; | |
85 | ||
86 | if (bfd_is_com_section (symbol->section)) | |
87 | { | |
88 | #ifndef COFF_WITH_PE | |
89 | /* We are relocating a common symbol. The current value in the | |
90 | object file is ORIG + OFFSET, where ORIG is the value of the | |
91 | common symbol as seen by the object file when it was compiled | |
92 | (this may be zero if the symbol was undefined) and OFFSET is | |
93 | the offset into the common symbol (normally zero, but may be | |
94 | non-zero when referring to a field in a common structure). | |
95 | ORIG is the negative of reloc_entry->addend, which is set by | |
96 | the CALC_ADDEND macro below. We want to replace the value in | |
97 | the object file with NEW + OFFSET, where NEW is the value of | |
98 | the common symbol which we are going to put in the final | |
99 | object file. NEW is symbol->value. */ | |
100 | diff = symbol->value + reloc_entry->addend; | |
101 | #else | |
102 | /* In PE mode, we do not offset the common symbol. */ | |
103 | diff = reloc_entry->addend; | |
104 | #endif | |
105 | } | |
106 | else | |
107 | { | |
108 | /* For some reason bfd_perform_relocation always effectively | |
109 | ignores the addend for a COFF target when producing | |
110 | relocateable output. This seems to be always wrong for 386 | |
111 | COFF, so we handle the addend here instead. */ | |
112 | diff = reloc_entry->addend; | |
113 | } | |
114 | ||
115 | #ifdef COFF_WITH_PE | |
116 | #if 0 | |
117 | /* dj - handle it like any other reloc? */ | |
118 | /* FIXME: How should this case be handled? */ | |
119 | if (reloc_entry->howto->type == MIPS_R_RVA && diff != 0) | |
120 | abort (); | |
121 | #endif | |
122 | #endif | |
123 | ||
124 | #define DOIT(x) \ | |
125 | x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + (diff >> howto->rightshift)) & howto->dst_mask)) | |
126 | ||
127 | if (diff != 0) | |
128 | { | |
129 | reloc_howto_type *howto = reloc_entry->howto; | |
130 | unsigned char *addr = (unsigned char *) data + reloc_entry->address; | |
131 | ||
132 | switch (howto->size) | |
133 | { | |
134 | case 0: | |
135 | { | |
136 | char x = bfd_get_8 (abfd, addr); | |
137 | DOIT (x); | |
138 | bfd_put_8 (abfd, x, addr); | |
139 | } | |
140 | break; | |
141 | ||
142 | case 1: | |
143 | { | |
144 | short x = bfd_get_16 (abfd, addr); | |
145 | DOIT (x); | |
146 | bfd_put_16 (abfd, x, addr); | |
147 | } | |
148 | break; | |
149 | ||
150 | case 2: | |
151 | { | |
152 | long x = bfd_get_32 (abfd, addr); | |
153 | DOIT (x); | |
154 | bfd_put_32 (abfd, x, addr); | |
155 | } | |
156 | break; | |
157 | ||
158 | default: | |
159 | abort (); | |
160 | } | |
161 | } | |
162 | ||
163 | /* Now let bfd_perform_relocation finish everything up. */ | |
164 | return bfd_reloc_continue; | |
165 | } | |
166 | ||
167 | #ifdef COFF_WITH_PE | |
168 | /* Return true if this relocation should | |
169 | appear in the output .reloc section. */ | |
170 | ||
171 | static boolean in_reloc_p(abfd, howto) | |
86033394 | 172 | bfd * abfd ATTRIBUTE_UNUSED; |
17505c5c NC |
173 | reloc_howto_type *howto; |
174 | { | |
175 | return ! howto->pc_relative && howto->type != MIPS_R_RVA; | |
176 | } | |
177 | #endif | |
178 | ||
179 | #ifndef PCRELOFFSET | |
180 | #define PCRELOFFSET false | |
181 | #endif | |
182 | ||
183 | static reloc_howto_type howto_table[] = | |
184 | { | |
185 | /* Reloc type 0 is ignored. The reloc reading code ensures that | |
186 | this is a reference to the .abs section, which will cause | |
187 | bfd_perform_relocation to do nothing. */ | |
188 | HOWTO (MIPS_R_ABSOLUTE, /* type */ | |
189 | 0, /* rightshift */ | |
190 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
191 | 8, /* bitsize */ | |
192 | false, /* pc_relative */ | |
193 | 0, /* bitpos */ | |
194 | complain_overflow_dont, /* complain_on_overflow */ | |
195 | 0, /* special_function */ | |
196 | "IGNORE", /* name */ | |
197 | false, /* partial_inplace */ | |
198 | 0, /* src_mask */ | |
199 | 0, /* dst_mask */ | |
200 | false), /* pcrel_offset */ | |
201 | ||
202 | /* A 16 bit reference to a symbol, normally from a data section. */ | |
203 | HOWTO (MIPS_R_REFHALF, /* type */ | |
204 | 0, /* rightshift */ | |
205 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
206 | 16, /* bitsize */ | |
207 | false, /* pc_relative */ | |
208 | 0, /* bitpos */ | |
209 | complain_overflow_bitfield, /* complain_on_overflow */ | |
210 | coff_mips_reloc, /* special_function */ | |
211 | "REFHALF", /* name */ | |
212 | true, /* partial_inplace */ | |
213 | 0xffff, /* src_mask */ | |
214 | 0xffff, /* dst_mask */ | |
215 | false), /* pcrel_offset */ | |
216 | ||
217 | /* A 32 bit reference to a symbol, normally from a data section. */ | |
218 | HOWTO (MIPS_R_REFWORD, /* type */ | |
219 | 0, /* rightshift */ | |
220 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
221 | 32, /* bitsize */ | |
222 | false, /* pc_relative */ | |
223 | 0, /* bitpos */ | |
224 | complain_overflow_bitfield, /* complain_on_overflow */ | |
225 | coff_mips_reloc, /* special_function */ | |
226 | "REFWORD", /* name */ | |
227 | true, /* partial_inplace */ | |
228 | 0xffffffff, /* src_mask */ | |
229 | 0xffffffff, /* dst_mask */ | |
230 | false), /* pcrel_offset */ | |
231 | ||
232 | /* A 26 bit absolute jump address. */ | |
233 | HOWTO (MIPS_R_JMPADDR, /* type */ | |
234 | 2, /* rightshift */ | |
235 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
236 | 26, /* bitsize */ | |
237 | false, /* pc_relative */ | |
238 | 0, /* bitpos */ | |
239 | complain_overflow_dont, /* complain_on_overflow */ | |
240 | /* This needs complex overflow | |
241 | detection, because the upper four | |
242 | bits must match the PC. */ | |
243 | coff_mips_reloc, /* special_function */ | |
244 | "JMPADDR", /* name */ | |
245 | true, /* partial_inplace */ | |
246 | 0x3ffffff, /* src_mask */ | |
247 | 0x3ffffff, /* dst_mask */ | |
248 | false), /* pcrel_offset */ | |
249 | ||
250 | /* The high 16 bits of a symbol value. Handled by the function | |
251 | mips_refhi_reloc. */ | |
252 | HOWTO (MIPS_R_REFHI, /* type */ | |
253 | 16, /* rightshift */ | |
254 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
255 | 16, /* bitsize */ | |
256 | false, /* pc_relative */ | |
257 | 0, /* bitpos */ | |
258 | complain_overflow_bitfield, /* complain_on_overflow */ | |
259 | coff_mips_reloc, /* special_function */ | |
260 | "REFHI", /* name */ | |
261 | true, /* partial_inplace */ | |
262 | 0xffff, /* src_mask */ | |
263 | 0xffff, /* dst_mask */ | |
264 | false), /* pcrel_offset */ | |
265 | ||
266 | /* The low 16 bits of a symbol value. */ | |
267 | HOWTO (MIPS_R_REFLO, /* type */ | |
268 | 0, /* rightshift */ | |
269 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
270 | 16, /* bitsize */ | |
271 | false, /* pc_relative */ | |
272 | 0, /* bitpos */ | |
273 | complain_overflow_dont, /* complain_on_overflow */ | |
274 | coff_mips_reloc, /* special_function */ | |
275 | "REFLO", /* name */ | |
276 | true, /* partial_inplace */ | |
277 | 0xffff, /* src_mask */ | |
278 | 0xffff, /* dst_mask */ | |
279 | false), /* pcrel_offset */ | |
280 | ||
281 | /* A reference to an offset from the gp register. Handled by the | |
282 | function mips_gprel_reloc. */ | |
283 | HOWTO (MIPS_R_GPREL, /* type */ | |
284 | 0, /* rightshift */ | |
285 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
286 | 16, /* bitsize */ | |
287 | false, /* pc_relative */ | |
288 | 0, /* bitpos */ | |
289 | complain_overflow_signed, /* complain_on_overflow */ | |
290 | coff_mips_reloc, /* special_function */ | |
291 | "GPREL", /* name */ | |
292 | true, /* partial_inplace */ | |
293 | 0xffff, /* src_mask */ | |
294 | 0xffff, /* dst_mask */ | |
295 | false), /* pcrel_offset */ | |
296 | ||
297 | /* A reference to a literal using an offset from the gp register. | |
298 | Handled by the function mips_gprel_reloc. */ | |
299 | HOWTO (MIPS_R_LITERAL, /* type */ | |
300 | 0, /* rightshift */ | |
301 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
302 | 16, /* bitsize */ | |
303 | false, /* pc_relative */ | |
304 | 0, /* bitpos */ | |
305 | complain_overflow_signed, /* complain_on_overflow */ | |
306 | coff_mips_reloc, /* special_function */ | |
307 | "LITERAL", /* name */ | |
308 | true, /* partial_inplace */ | |
309 | 0xffff, /* src_mask */ | |
310 | 0xffff, /* dst_mask */ | |
311 | false), /* pcrel_offset */ | |
312 | ||
86033394 NC |
313 | EMPTY_HOWTO (8), |
314 | EMPTY_HOWTO (9), | |
315 | EMPTY_HOWTO (10), | |
316 | EMPTY_HOWTO (11), | |
317 | EMPTY_HOWTO (12), | |
318 | EMPTY_HOWTO (13), | |
319 | EMPTY_HOWTO (14), | |
320 | EMPTY_HOWTO (15), | |
321 | EMPTY_HOWTO (16), | |
322 | EMPTY_HOWTO (17), | |
323 | EMPTY_HOWTO (18), | |
324 | EMPTY_HOWTO (19), | |
325 | EMPTY_HOWTO (20), | |
326 | EMPTY_HOWTO (21), | |
327 | EMPTY_HOWTO (22), | |
328 | EMPTY_HOWTO (23), | |
329 | EMPTY_HOWTO (24), | |
330 | EMPTY_HOWTO (25), | |
331 | EMPTY_HOWTO (26), | |
332 | EMPTY_HOWTO (27), | |
333 | EMPTY_HOWTO (28), | |
334 | EMPTY_HOWTO (29), | |
335 | EMPTY_HOWTO (30), | |
336 | EMPTY_HOWTO (31), | |
337 | EMPTY_HOWTO (32), | |
338 | EMPTY_HOWTO (33), | |
17505c5c NC |
339 | HOWTO (MIPS_R_RVA, /* type */ |
340 | 0, /* rightshift */ | |
341 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
342 | 32, /* bitsize */ | |
343 | false, /* pc_relative */ | |
344 | 0, /* bitpos */ | |
345 | complain_overflow_bitfield, /* complain_on_overflow */ | |
346 | coff_mips_reloc, /* special_function */ | |
347 | "rva32", /* name */ | |
348 | true, /* partial_inplace */ | |
349 | 0xffffffff, /* src_mask */ | |
350 | 0xffffffff, /* dst_mask */ | |
351 | false), /* pcrel_offset */ | |
86033394 NC |
352 | EMPTY_HOWTO (35), |
353 | EMPTY_HOWTO (36), | |
17505c5c NC |
354 | HOWTO (MIPS_R_PAIR, /* type */ |
355 | 0, /* rightshift */ | |
356 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
357 | 32, /* bitsize */ | |
358 | false, /* pc_relative */ | |
359 | 0, /* bitpos */ | |
360 | complain_overflow_bitfield, /* complain_on_overflow */ | |
361 | coff_mips_reloc, /* special_function */ | |
362 | "PAIR", /* name */ | |
363 | true, /* partial_inplace */ | |
364 | 0xffffffff, /* src_mask */ | |
365 | 0xffffffff, /* dst_mask */ | |
366 | false), /* pcrel_offset */ | |
367 | }; | |
368 | ||
369 | /* Turn a howto into a reloc nunmber */ | |
370 | ||
371 | #define SELECT_RELOC(x,howto) { x.r_type = howto->type; } | |
372 | #define BADMAG(x) MIPSBADMAG(x) | |
373 | #define MIPS 1 /* Customize coffcode.h */ | |
374 | ||
375 | #define RTYPE2HOWTO(cache_ptr, dst) \ | |
376 | (cache_ptr)->howto = howto_table + (dst)->r_type; | |
377 | ||
378 | /* Compute the addend of a reloc. If the reloc is to a common symbol, | |
379 | the object file contains the value of the common symbol. By the | |
380 | time this is called, the linker may be using a different symbol | |
381 | from a different object file with a different value. Therefore, we | |
382 | hack wildly to locate the original symbol from this file so that we | |
383 | can make the correct adjustment. This macro sets coffsym to the | |
384 | symbol from the original file, and uses it to set the addend value | |
385 | correctly. If this is not a common symbol, the usual addend | |
386 | calculation is done, except that an additional tweak is needed for | |
387 | PC relative relocs. | |
388 | FIXME: This macro refers to symbols and asect; these are from the | |
389 | calling function, not the macro arguments. */ | |
390 | ||
391 | #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \ | |
392 | { \ | |
393 | coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \ | |
394 | if (ptr && bfd_asymbol_bfd (ptr) != abfd) \ | |
395 | coffsym = (obj_symbols (abfd) \ | |
396 | + (cache_ptr->sym_ptr_ptr - symbols)); \ | |
397 | else if (ptr) \ | |
398 | coffsym = coff_symbol_from (abfd, ptr); \ | |
399 | if (coffsym != (coff_symbol_type *) NULL \ | |
400 | && coffsym->native->u.syment.n_scnum == 0) \ | |
401 | cache_ptr->addend = - coffsym->native->u.syment.n_value; \ | |
402 | else if (ptr && bfd_asymbol_bfd (ptr) == abfd \ | |
403 | && ptr->section != (asection *) NULL) \ | |
404 | cache_ptr->addend = - (ptr->section->vma + ptr->value); \ | |
405 | else \ | |
406 | cache_ptr->addend = 0; \ | |
407 | if (ptr && howto_table[reloc.r_type].pc_relative) \ | |
408 | cache_ptr->addend += asect->vma; \ | |
409 | } | |
410 | ||
411 | ||
412 | /* Convert an rtype to howto for the COFF backend linker. */ | |
413 | ||
414 | static reloc_howto_type * | |
415 | coff_mips_rtype_to_howto (abfd, sec, rel, h, sym, addendp) | |
86033394 | 416 | bfd *abfd ATTRIBUTE_UNUSED; |
17505c5c NC |
417 | asection *sec; |
418 | struct internal_reloc *rel; | |
419 | struct coff_link_hash_entry *h; | |
420 | struct internal_syment *sym; | |
421 | bfd_vma *addendp; | |
422 | { | |
423 | ||
424 | reloc_howto_type *howto; | |
425 | ||
426 | howto = howto_table + rel->r_type; | |
427 | ||
428 | #ifdef COFF_WITH_PE | |
429 | *addendp = 0; | |
430 | #endif | |
431 | ||
432 | if (howto->pc_relative) | |
433 | *addendp += sec->vma; | |
434 | ||
435 | if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0) | |
436 | { | |
437 | /* This is a common symbol. The section contents include the | |
438 | size (sym->n_value) as an addend. The relocate_section | |
439 | function will be adding in the final value of the symbol. We | |
440 | need to subtract out the current size in order to get the | |
441 | correct result. */ | |
442 | ||
443 | BFD_ASSERT (h != NULL); | |
444 | ||
445 | #ifndef COFF_WITH_PE | |
446 | /* I think we *do* want to bypass this. If we don't, I have | |
447 | seen some data parameters get the wrong relocation address. | |
448 | If I link two versions with and without this section bypassed | |
449 | and then do a binary comparison, the addresses which are | |
450 | different can be looked up in the map. The case in which | |
451 | this section has been bypassed has addresses which correspond | |
452 | to values I can find in the map. */ | |
453 | *addendp -= sym->n_value; | |
454 | #endif | |
455 | } | |
456 | ||
457 | #ifndef COFF_WITH_PE | |
458 | /* If the output symbol is common (in which case this must be a | |
459 | relocateable link), we need to add in the final size of the | |
460 | common symbol. */ | |
461 | if (h != NULL && h->root.type == bfd_link_hash_common) | |
462 | *addendp += h->root.u.c.size; | |
463 | #endif | |
464 | ||
465 | #ifdef COFF_WITH_PE | |
466 | if (howto->pc_relative) | |
467 | { | |
468 | *addendp -= 4; | |
469 | ||
470 | /* If the symbol is defined, then the generic code is going to | |
471 | add back the symbol value in order to cancel out an | |
472 | adjustment it made to the addend. However, we set the addend | |
473 | to 0 at the start of this function. We need to adjust here, | |
474 | to avoid the adjustment the generic code will make. FIXME: | |
475 | This is getting a bit hackish. */ | |
476 | if (sym != NULL && sym->n_scnum != 0) | |
477 | *addendp -= sym->n_value; | |
478 | } | |
479 | ||
480 | if (rel->r_type == MIPS_R_RVA) | |
481 | { | |
482 | *addendp -= pe_data(sec->output_section->owner)->pe_opthdr.ImageBase; | |
483 | } | |
484 | #endif | |
485 | ||
486 | return howto; | |
487 | } | |
488 | ||
489 | #define coff_rtype_to_howto coff_mips_rtype_to_howto | |
490 | ||
491 | ||
492 | #define coff_bfd_reloc_type_lookup coff_mips_reloc_type_lookup | |
493 | ||
494 | ||
495 | ||
496 | /* Get the howto structure for a generic reloc type. */ | |
497 | ||
498 | static reloc_howto_type * | |
499 | coff_mips_reloc_type_lookup (abfd, code) | |
86033394 | 500 | bfd *abfd ATTRIBUTE_UNUSED; |
17505c5c NC |
501 | bfd_reloc_code_real_type code; |
502 | { | |
503 | int mips_type; | |
504 | ||
505 | switch (code) | |
506 | { | |
507 | case BFD_RELOC_16: | |
508 | mips_type = MIPS_R_REFHALF; | |
509 | break; | |
510 | case BFD_RELOC_32: | |
511 | case BFD_RELOC_CTOR: | |
512 | mips_type = MIPS_R_REFWORD; | |
513 | break; | |
514 | case BFD_RELOC_MIPS_JMP: | |
515 | mips_type = MIPS_R_JMPADDR; | |
516 | break; | |
517 | case BFD_RELOC_HI16_S: | |
518 | mips_type = MIPS_R_REFHI; | |
519 | break; | |
520 | case BFD_RELOC_LO16: | |
521 | mips_type = MIPS_R_REFLO; | |
522 | break; | |
523 | case BFD_RELOC_MIPS_GPREL: | |
524 | mips_type = MIPS_R_GPREL; | |
525 | break; | |
526 | case BFD_RELOC_MIPS_LITERAL: | |
527 | mips_type = MIPS_R_LITERAL; | |
528 | break; | |
529 | /* FIXME? | |
530 | case BFD_RELOC_16_PCREL_S2: | |
531 | mips_type = MIPS_R_PCREL16; | |
532 | break; | |
533 | case BFD_RELOC_PCREL_HI16_S: | |
534 | mips_type = MIPS_R_RELHI; | |
535 | break; | |
536 | case BFD_RELOC_PCREL_LO16: | |
537 | mips_type = MIPS_R_RELLO; | |
538 | break; | |
539 | case BFD_RELOC_GPREL32: | |
540 | mips_type = MIPS_R_SWITCH; | |
541 | break; | |
542 | */ | |
543 | case BFD_RELOC_RVA: | |
544 | mips_type = MIPS_R_RVA; | |
545 | break; | |
546 | default: | |
547 | return (reloc_howto_type *) NULL; | |
548 | } | |
549 | ||
550 | return &howto_table[mips_type]; | |
551 | } | |
552 | ||
553 | static void | |
554 | mips_swap_reloc_in (abfd, src, dst) | |
555 | bfd *abfd; | |
556 | PTR src; | |
557 | PTR dst; | |
558 | { | |
559 | static struct internal_reloc pair_prev; | |
560 | RELOC *reloc_src = (RELOC *) src; | |
561 | struct internal_reloc *reloc_dst = (struct internal_reloc *) dst; | |
562 | ||
563 | reloc_dst->r_vaddr = bfd_h_get_32(abfd, (bfd_byte *)reloc_src->r_vaddr); | |
564 | reloc_dst->r_symndx = | |
565 | bfd_h_get_signed_32(abfd, (bfd_byte *) reloc_src->r_symndx); | |
566 | reloc_dst->r_type = bfd_h_get_16(abfd, (bfd_byte *) reloc_src->r_type); | |
567 | reloc_dst->r_size = 0; | |
568 | reloc_dst->r_extern = 0; | |
569 | reloc_dst->r_offset = 0; | |
570 | ||
571 | switch (reloc_dst->r_type) | |
572 | { | |
573 | case MIPS_R_REFHI: | |
574 | pair_prev = *reloc_dst; | |
575 | break; | |
576 | case MIPS_R_PAIR: | |
577 | reloc_dst->r_offset = reloc_dst->r_symndx; | |
578 | if (reloc_dst->r_offset & 0x8000) | |
579 | reloc_dst->r_offset -= 0x10000; | |
580 | /*printf("dj: pair offset is %08x\n", reloc_dst->r_offset);*/ | |
581 | reloc_dst->r_symndx = pair_prev.r_symndx; | |
582 | break; | |
583 | } | |
584 | } | |
585 | ||
586 | static unsigned int | |
587 | mips_swap_reloc_out (abfd, src, dst) | |
588 | bfd *abfd; | |
589 | PTR src; | |
590 | PTR dst; | |
591 | { | |
592 | static int prev_offset = 1; | |
593 | static bfd_vma prev_addr = 0; | |
594 | struct internal_reloc *reloc_src = (struct internal_reloc *)src; | |
595 | struct external_reloc *reloc_dst = (struct external_reloc *)dst; | |
596 | ||
597 | switch (reloc_src->r_type) | |
598 | { | |
599 | case MIPS_R_REFHI: | |
600 | prev_addr = reloc_src->r_vaddr; | |
601 | prev_offset = reloc_src->r_offset; | |
602 | break; | |
603 | case MIPS_R_REFLO: | |
604 | if (reloc_src->r_vaddr == prev_addr) | |
605 | { | |
606 | /* FIXME: only slightly hackish. If we see a REFLO pointing to | |
607 | the same address as a REFHI, we assume this is the matching | |
608 | PAIR reloc and output it accordingly. The symndx is really | |
609 | the low 16 bits of the addend */ | |
610 | bfd_h_put_32 (abfd, reloc_src->r_vaddr, | |
611 | (bfd_byte *) reloc_dst->r_vaddr); | |
612 | bfd_h_put_32 (abfd, reloc_src->r_symndx, | |
613 | (bfd_byte *) reloc_dst->r_symndx); | |
614 | ||
615 | bfd_h_put_16(abfd, MIPS_R_PAIR, (bfd_byte *) | |
616 | reloc_dst->r_type); | |
617 | return RELSZ; | |
618 | } | |
619 | break; | |
620 | } | |
621 | ||
622 | bfd_h_put_32(abfd, reloc_src->r_vaddr, (bfd_byte *) reloc_dst->r_vaddr); | |
623 | bfd_h_put_32(abfd, reloc_src->r_symndx, (bfd_byte *) reloc_dst->r_symndx); | |
624 | ||
625 | bfd_h_put_16(abfd, reloc_src->r_type, (bfd_byte *) | |
626 | reloc_dst->r_type); | |
627 | return RELSZ; | |
628 | } | |
629 | ||
630 | #define coff_swap_reloc_in mips_swap_reloc_in | |
631 | #define coff_swap_reloc_out mips_swap_reloc_out | |
632 | #define NO_COFF_RELOCS | |
633 | ||
634 | static boolean | |
635 | coff_pe_mips_relocate_section (output_bfd, info, input_bfd, | |
636 | input_section, contents, relocs, syms, | |
637 | sections) | |
638 | bfd *output_bfd; | |
639 | struct bfd_link_info *info; | |
640 | bfd *input_bfd; | |
641 | asection *input_section; | |
642 | bfd_byte *contents; | |
643 | struct internal_reloc *relocs; | |
644 | struct internal_syment *syms; | |
645 | asection **sections; | |
646 | { | |
17505c5c NC |
647 | bfd_vma gp; |
648 | boolean gp_undefined; | |
649 | size_t adjust; | |
17505c5c NC |
650 | struct internal_reloc *rel; |
651 | struct internal_reloc *rel_end; | |
652 | unsigned int i; | |
653 | boolean got_lo; | |
17505c5c NC |
654 | |
655 | if (info->relocateable) | |
656 | { | |
657 | (*_bfd_error_handler)(_("\ | |
658 | %s: `ld -r' not supported with PE MIPS objects\n"), | |
659 | bfd_get_filename (input_bfd)); | |
660 | bfd_set_error (bfd_error_bad_value); | |
661 | return false; | |
662 | } | |
663 | ||
664 | BFD_ASSERT (input_bfd->xvec->byteorder | |
665 | == output_bfd->xvec->byteorder); | |
666 | ||
667 | #if 0 | |
668 | printf("dj: relocate %s(%s) %08x\n", | |
669 | input_bfd->filename, input_section->name, | |
670 | input_section->output_section->vma + input_section->output_offset); | |
671 | #endif | |
672 | ||
673 | gp = _bfd_get_gp_value (output_bfd); | |
674 | if (gp == 0) | |
675 | gp_undefined = true; | |
676 | else | |
677 | gp_undefined = false; | |
678 | ||
679 | got_lo = false; | |
680 | ||
681 | adjust = 0; | |
682 | ||
683 | rel = relocs; | |
684 | rel_end = rel + input_section->reloc_count; | |
685 | for (i = 0; rel < rel_end; rel++, i++) | |
686 | { | |
687 | long symndx; | |
688 | struct coff_link_hash_entry *h; | |
689 | struct internal_syment *sym; | |
690 | bfd_vma addend = 0; | |
691 | bfd_vma val, tmp, targ, src, low; | |
692 | reloc_howto_type *howto; | |
17505c5c NC |
693 | unsigned char *mem = contents + rel->r_vaddr; |
694 | ||
695 | symndx = rel->r_symndx; | |
696 | ||
697 | if (symndx == -1) | |
698 | { | |
699 | h = NULL; | |
700 | sym = NULL; | |
701 | } | |
702 | else | |
703 | { | |
704 | h = obj_coff_sym_hashes (input_bfd)[symndx]; | |
705 | sym = syms + symndx; | |
706 | } | |
707 | ||
708 | /* COFF treats common symbols in one of two ways. Either the | |
709 | size of the symbol is included in the section contents, or it | |
710 | is not. We assume that the size is not included, and force | |
711 | the rtype_to_howto function to adjust the addend as needed. */ | |
712 | ||
713 | if (sym != NULL && sym->n_scnum != 0) | |
714 | addend = - sym->n_value; | |
715 | else | |
716 | addend = 0; | |
717 | ||
718 | ||
719 | howto = bfd_coff_rtype_to_howto (input_bfd, input_section, rel, h, | |
720 | sym, &addend); | |
721 | if (howto == NULL) | |
722 | return false; | |
723 | ||
724 | /* If we are doing a relocateable link, then we can just ignore | |
725 | a PC relative reloc that is pcrel_offset. It will already | |
726 | have the correct value. If this is not a relocateable link, | |
727 | then we should ignore the symbol value. */ | |
728 | if (howto->pc_relative && howto->pcrel_offset) | |
729 | { | |
730 | if (info->relocateable) | |
731 | continue; | |
732 | if (sym != NULL && sym->n_scnum != 0) | |
733 | addend += sym->n_value; | |
734 | } | |
735 | ||
736 | val = 0; | |
737 | ||
738 | if (h == NULL) | |
739 | { | |
740 | asection *sec; | |
741 | ||
742 | if (symndx == -1) | |
743 | { | |
744 | sec = bfd_abs_section_ptr; | |
745 | val = 0; | |
746 | } | |
747 | else | |
748 | { | |
749 | sec = sections[symndx]; | |
750 | val = (sec->output_section->vma | |
751 | + sec->output_offset | |
752 | + sym->n_value); | |
753 | if (! obj_pe (input_bfd)) | |
754 | val -= sec->vma; | |
755 | } | |
756 | } | |
757 | else | |
758 | { | |
759 | if (h->root.type == bfd_link_hash_defined | |
760 | || h->root.type == bfd_link_hash_defweak) | |
761 | { | |
762 | asection *sec; | |
763 | ||
764 | sec = h->root.u.def.section; | |
765 | val = (h->root.u.def.value | |
766 | + sec->output_section->vma | |
767 | + sec->output_offset); | |
768 | } | |
769 | ||
770 | else if (! info->relocateable) | |
771 | { | |
772 | if (! ((*info->callbacks->undefined_symbol) | |
773 | (info, h->root.root.string, input_bfd, input_section, | |
5cc7c785 | 774 | rel->r_vaddr - input_section->vma, true))) |
17505c5c NC |
775 | return false; |
776 | } | |
777 | } | |
778 | ||
779 | src = rel->r_vaddr + input_section->output_section->vma | |
780 | + input_section->output_offset; | |
781 | #if 0 | |
782 | printf("dj: reloc %02x %-8s a=%08x/%08x(%08x) v=%08x+%08x %s\n", | |
783 | rel->r_type, howto_table[rel->r_type].name, | |
784 | src, rel->r_vaddr, *(unsigned long *)mem, val, rel->r_offset, | |
785 | h?h->root.root.string:"(none)"); | |
786 | #endif | |
787 | ||
788 | /* OK, at this point the following variables are set up: | |
789 | src = VMA of the memory we're fixing up | |
790 | mem = pointer to memory we're fixing up | |
791 | val = VMA of what we need to refer to | |
792 | */ | |
793 | ||
794 | #define UI(x) (*_bfd_error_handler)(_("%s: unimplemented %s\n"), \ | |
795 | bfd_get_filename (input_bfd), x); \ | |
796 | bfd_set_error (bfd_error_bad_value); | |
797 | ||
798 | switch (rel->r_type) | |
799 | { | |
800 | case MIPS_R_ABSOLUTE: | |
801 | /* ignore these */ | |
802 | break; | |
803 | ||
804 | case MIPS_R_REFHALF: | |
805 | UI("refhalf"); | |
806 | break; | |
807 | ||
808 | case MIPS_R_REFWORD: | |
809 | tmp = bfd_get_32(input_bfd, mem); | |
810 | /* printf("refword: src=%08x targ=%08x+%08x\n", src, tmp, val); */ | |
811 | tmp += val; | |
812 | bfd_put_32(input_bfd, tmp, mem); | |
813 | break; | |
814 | ||
815 | case MIPS_R_JMPADDR: | |
816 | tmp = bfd_get_32(input_bfd, mem); | |
817 | targ = val + (tmp&0x03ffffff)*4; | |
86033394 | 818 | if ((src & 0xf0000000) != (targ & 0xf0000000)) |
17505c5c NC |
819 | { |
820 | (*_bfd_error_handler)(_("%s: jump too far away\n"), | |
821 | bfd_get_filename (input_bfd)); | |
822 | bfd_set_error (bfd_error_bad_value); | |
823 | return false; | |
824 | } | |
825 | tmp &= 0xfc000000; | |
826 | tmp |= (targ/4) & 0x3ffffff; | |
827 | bfd_put_32(input_bfd, tmp, mem); | |
828 | break; | |
829 | ||
830 | case MIPS_R_REFHI: | |
831 | tmp = bfd_get_32(input_bfd, mem); | |
832 | switch (rel[1].r_type) | |
833 | { | |
834 | case MIPS_R_PAIR: | |
835 | /* MS PE object */ | |
836 | targ = val + rel[1].r_offset + ((tmp & 0xffff) << 16); | |
837 | break; | |
838 | case MIPS_R_REFLO: | |
839 | /* GNU COFF object */ | |
840 | low = bfd_get_32(input_bfd, contents + rel[1].r_vaddr); | |
841 | low &= 0xffff; | |
842 | if (low & 0x8000) | |
843 | low -= 0x10000; | |
844 | targ = val + low + ((tmp & 0xffff) << 16); | |
845 | break; | |
846 | default: | |
847 | (*_bfd_error_handler)(_("%s: bad pair/reflo after refhi\n"), | |
848 | bfd_get_filename (input_bfd)); | |
849 | bfd_set_error (bfd_error_bad_value); | |
850 | return false; | |
851 | } | |
852 | tmp &= 0xffff0000; | |
853 | tmp |= (targ >> 16) & 0xffff; | |
854 | bfd_put_32(input_bfd, tmp, mem); | |
855 | break; | |
856 | ||
857 | case MIPS_R_REFLO: | |
858 | tmp = bfd_get_32(input_bfd, mem); | |
859 | targ = val + (tmp & 0xffff); | |
860 | /* printf("refword: src=%08x targ=%08x\n", src, targ); */ | |
861 | tmp &= 0xffff0000; | |
862 | tmp |= targ & 0xffff; | |
863 | bfd_put_32(input_bfd, tmp, mem); | |
864 | break; | |
865 | ||
866 | case MIPS_R_GPREL: | |
867 | case MIPS_R_LITERAL: | |
868 | UI("gprel"); | |
869 | break; | |
870 | ||
871 | case MIPS_R_SECTION: | |
872 | UI("section"); | |
873 | break; | |
874 | ||
875 | case MIPS_R_SECREL: | |
876 | UI("secrel"); | |
877 | break; | |
878 | ||
879 | case MIPS_R_SECRELLO: | |
880 | UI("secrello"); | |
881 | break; | |
882 | ||
883 | case MIPS_R_SECRELHI: | |
884 | UI("secrelhi"); | |
885 | break; | |
886 | ||
887 | case MIPS_R_RVA: | |
888 | tmp = bfd_get_32 (input_bfd, mem); | |
889 | /* printf("rva: src=%08x targ=%08x+%08x\n", src, tmp, val); */ | |
890 | tmp += val | |
86033394 | 891 | - pe_data (input_section->output_section->owner)->pe_opthdr.ImageBase; |
17505c5c NC |
892 | bfd_put_32 (input_bfd, tmp, mem); |
893 | break; | |
894 | ||
895 | case MIPS_R_PAIR: | |
896 | /* ignore these */ | |
897 | break; | |
898 | } | |
899 | } | |
900 | ||
901 | return true; | |
902 | } | |
903 | ||
904 | #define coff_relocate_section coff_pe_mips_relocate_section | |
905 | ||
906 | #ifdef TARGET_UNDERSCORE | |
907 | ||
908 | /* If mips gcc uses underscores for symbol names, then it does not use | |
909 | a leading dot for local labels, so if TARGET_UNDERSCORE is defined | |
910 | we treat all symbols starting with L as local. */ | |
911 | ||
912 | static boolean coff_mips_is_local_label_name PARAMS ((bfd *, const char *)); | |
913 | ||
914 | static boolean | |
915 | coff_mips_is_local_label_name (abfd, name) | |
916 | bfd *abfd; | |
917 | const char *name; | |
918 | { | |
919 | if (name[0] == 'L') | |
920 | return true; | |
921 | ||
922 | return _bfd_coff_is_local_label_name (abfd, name); | |
923 | } | |
924 | ||
925 | #define coff_bfd_is_local_label_name coff_mips_is_local_label_name | |
926 | ||
927 | #endif /* TARGET_UNDERSCORE */ | |
928 | ||
929 | #define COFF_NO_HACK_SCNHDR_SIZE | |
930 | ||
931 | #include "coffcode.h" | |
932 | ||
933 | const bfd_target | |
934 | #ifdef TARGET_SYM | |
935 | TARGET_SYM = | |
936 | #else | |
937 | mipslpe_vec = | |
938 | #endif | |
939 | { | |
940 | #ifdef TARGET_NAME | |
941 | TARGET_NAME, | |
942 | #else | |
943 | "pe-mips", /* name */ | |
944 | #endif | |
945 | bfd_target_coff_flavour, | |
946 | BFD_ENDIAN_LITTLE, /* data byte order is little */ | |
947 | BFD_ENDIAN_LITTLE, /* header byte order is little */ | |
948 | ||
949 | (HAS_RELOC | EXEC_P | /* object flags */ | |
950 | HAS_LINENO | HAS_DEBUG | | |
951 | HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), | |
952 | ||
953 | #ifndef COFF_WITH_PE | |
954 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */ | |
955 | | SEC_CODE | SEC_DATA), | |
956 | #else | |
957 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */ | |
958 | | SEC_CODE | SEC_DATA | |
959 | | SEC_LINK_ONCE | SEC_LINK_DUPLICATES), | |
960 | #endif | |
961 | ||
962 | #ifdef TARGET_UNDERSCORE | |
963 | TARGET_UNDERSCORE, /* leading underscore */ | |
964 | #else | |
965 | 0, /* leading underscore */ | |
966 | #endif | |
967 | '/', /* ar_pad_char */ | |
968 | 15, /* ar_max_namelen */ | |
969 | ||
970 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
971 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
972 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ | |
973 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
974 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
975 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ | |
976 | ||
977 | /* Note that we allow an object file to be treated as a core file as well. */ | |
978 | {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ | |
979 | bfd_generic_archive_p, coff_object_p}, | |
980 | {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */ | |
981 | bfd_false}, | |
982 | {bfd_false, coff_write_object_contents, /* bfd_write_contents */ | |
983 | _bfd_write_archive_contents, bfd_false}, | |
984 | ||
985 | BFD_JUMP_TABLE_GENERIC (coff), | |
986 | BFD_JUMP_TABLE_COPY (coff), | |
987 | BFD_JUMP_TABLE_CORE (_bfd_nocore), | |
988 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), | |
989 | BFD_JUMP_TABLE_SYMBOLS (coff), | |
990 | BFD_JUMP_TABLE_RELOCS (coff), | |
991 | BFD_JUMP_TABLE_WRITE (coff), | |
992 | BFD_JUMP_TABLE_LINK (coff), | |
993 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
994 | ||
995 | NULL, | |
996 | ||
997 | COFF_SWAP_TABLE | |
998 | }; |