Commit | Line | Data |
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17505c5c | 1 | /* BFD back-end for MIPS PE COFF files. |
7898deda NC |
2 | Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
3 | 2000, 2001 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 | |
24 | #define PCRELOFFSET true | |
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 *, | |
43 | ||
44 | bfd_vma *)); | |
86033394 | 45 | #if 0 |
17505c5c NC |
46 | static void mips_ecoff_swap_reloc_in PARAMS ((bfd *, PTR, |
47 | struct internal_reloc *)); | |
48 | static void mips_ecoff_swap_reloc_out PARAMS ((bfd *, | |
49 | const struct internal_reloc *, | |
50 | PTR)); | |
51 | static void mips_adjust_reloc_in PARAMS ((bfd *, | |
52 | const struct internal_reloc *, | |
53 | arelent *)); | |
54 | static void mips_adjust_reloc_out PARAMS ((bfd *, const arelent *, | |
55 | struct internal_reloc *)); | |
86033394 | 56 | #endif |
42ef282f NC |
57 | |
58 | static boolean in_reloc_p PARAMS ((bfd *, reloc_howto_type *)); | |
59 | static reloc_howto_type * coff_mips_reloc_type_lookup PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
60 | static void mips_swap_reloc_in PARAMS ((bfd *, PTR, PTR)); | |
61 | static unsigned int mips_swap_reloc_out PARAMS ((bfd *, PTR, PTR)); | |
62 | static boolean coff_pe_mips_relocate_section | |
63 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, | |
64 | struct internal_reloc *, struct internal_syment *, asection **)); | |
65 | ||
17505c5c NC |
66 | #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2) |
67 | /* The page size is a guess based on ELF. */ | |
68 | ||
69 | #define COFF_PAGE_SIZE 0x1000 | |
70 | ||
71 | /* For some reason when using mips COFF the value stored in the .text | |
72 | section for a reference to a common symbol is the value itself plus | |
73 | any desired offset. Ian Taylor, Cygnus Support. */ | |
74 | ||
75 | /* If we are producing relocateable output, we need to do some | |
76 | adjustments to the object file that are not done by the | |
77 | bfd_perform_relocation function. This function is called by every | |
78 | reloc type to make any required adjustments. */ | |
79 | ||
80 | static bfd_reloc_status_type | |
81 | coff_mips_reloc (abfd, reloc_entry, symbol, data, input_section, output_bfd, | |
82 | error_message) | |
83 | bfd *abfd; | |
84 | arelent *reloc_entry; | |
85 | asymbol *symbol; | |
86 | PTR data; | |
86033394 | 87 | asection *input_section ATTRIBUTE_UNUSED; |
17505c5c | 88 | bfd *output_bfd; |
86033394 | 89 | char **error_message ATTRIBUTE_UNUSED; |
17505c5c NC |
90 | { |
91 | symvalue diff; | |
92 | ||
93 | if (output_bfd == (bfd *) NULL) | |
94 | return bfd_reloc_continue; | |
95 | ||
96 | if (bfd_is_com_section (symbol->section)) | |
97 | { | |
98 | #ifndef COFF_WITH_PE | |
99 | /* We are relocating a common symbol. The current value in the | |
100 | object file is ORIG + OFFSET, where ORIG is the value of the | |
101 | common symbol as seen by the object file when it was compiled | |
102 | (this may be zero if the symbol was undefined) and OFFSET is | |
103 | the offset into the common symbol (normally zero, but may be | |
104 | non-zero when referring to a field in a common structure). | |
105 | ORIG is the negative of reloc_entry->addend, which is set by | |
106 | the CALC_ADDEND macro below. We want to replace the value in | |
107 | the object file with NEW + OFFSET, where NEW is the value of | |
108 | the common symbol which we are going to put in the final | |
109 | object file. NEW is symbol->value. */ | |
110 | diff = symbol->value + reloc_entry->addend; | |
111 | #else | |
112 | /* In PE mode, we do not offset the common symbol. */ | |
113 | diff = reloc_entry->addend; | |
114 | #endif | |
115 | } | |
116 | else | |
117 | { | |
118 | /* For some reason bfd_perform_relocation always effectively | |
119 | ignores the addend for a COFF target when producing | |
120 | relocateable output. This seems to be always wrong for 386 | |
121 | COFF, so we handle the addend here instead. */ | |
122 | diff = reloc_entry->addend; | |
123 | } | |
124 | ||
125 | #ifdef COFF_WITH_PE | |
126 | #if 0 | |
127 | /* dj - handle it like any other reloc? */ | |
128 | /* FIXME: How should this case be handled? */ | |
129 | if (reloc_entry->howto->type == MIPS_R_RVA && diff != 0) | |
130 | abort (); | |
131 | #endif | |
132 | #endif | |
133 | ||
134 | #define DOIT(x) \ | |
135 | x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + (diff >> howto->rightshift)) & howto->dst_mask)) | |
136 | ||
137 | if (diff != 0) | |
138 | { | |
139 | reloc_howto_type *howto = reloc_entry->howto; | |
140 | unsigned char *addr = (unsigned char *) data + reloc_entry->address; | |
141 | ||
142 | switch (howto->size) | |
143 | { | |
144 | case 0: | |
145 | { | |
146 | char x = bfd_get_8 (abfd, addr); | |
147 | DOIT (x); | |
148 | bfd_put_8 (abfd, x, addr); | |
149 | } | |
150 | break; | |
151 | ||
152 | case 1: | |
153 | { | |
154 | short x = bfd_get_16 (abfd, addr); | |
155 | DOIT (x); | |
156 | bfd_put_16 (abfd, x, addr); | |
157 | } | |
158 | break; | |
159 | ||
160 | case 2: | |
161 | { | |
162 | long x = bfd_get_32 (abfd, addr); | |
163 | DOIT (x); | |
164 | bfd_put_32 (abfd, x, addr); | |
165 | } | |
166 | break; | |
167 | ||
168 | default: | |
169 | abort (); | |
170 | } | |
171 | } | |
172 | ||
173 | /* Now let bfd_perform_relocation finish everything up. */ | |
174 | return bfd_reloc_continue; | |
175 | } | |
176 | ||
177 | #ifdef COFF_WITH_PE | |
178 | /* Return true if this relocation should | |
892339ee | 179 | appear in the output .reloc section. */ |
17505c5c | 180 | |
42ef282f NC |
181 | static boolean |
182 | in_reloc_p (abfd, howto) | |
86033394 | 183 | bfd * abfd ATTRIBUTE_UNUSED; |
17505c5c NC |
184 | reloc_howto_type *howto; |
185 | { | |
186 | return ! howto->pc_relative && howto->type != MIPS_R_RVA; | |
892339ee | 187 | } |
17505c5c NC |
188 | #endif |
189 | ||
190 | #ifndef PCRELOFFSET | |
191 | #define PCRELOFFSET false | |
192 | #endif | |
193 | ||
892339ee | 194 | static reloc_howto_type howto_table[] = |
17505c5c NC |
195 | { |
196 | /* Reloc type 0 is ignored. The reloc reading code ensures that | |
197 | this is a reference to the .abs section, which will cause | |
198 | bfd_perform_relocation to do nothing. */ | |
199 | HOWTO (MIPS_R_ABSOLUTE, /* type */ | |
200 | 0, /* rightshift */ | |
201 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
202 | 8, /* bitsize */ | |
203 | false, /* pc_relative */ | |
204 | 0, /* bitpos */ | |
205 | complain_overflow_dont, /* complain_on_overflow */ | |
206 | 0, /* special_function */ | |
207 | "IGNORE", /* name */ | |
208 | false, /* partial_inplace */ | |
209 | 0, /* src_mask */ | |
210 | 0, /* dst_mask */ | |
211 | false), /* pcrel_offset */ | |
212 | ||
213 | /* A 16 bit reference to a symbol, normally from a data section. */ | |
214 | HOWTO (MIPS_R_REFHALF, /* type */ | |
215 | 0, /* rightshift */ | |
216 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
217 | 16, /* bitsize */ | |
218 | false, /* pc_relative */ | |
219 | 0, /* bitpos */ | |
220 | complain_overflow_bitfield, /* complain_on_overflow */ | |
221 | coff_mips_reloc, /* special_function */ | |
222 | "REFHALF", /* name */ | |
223 | true, /* partial_inplace */ | |
224 | 0xffff, /* src_mask */ | |
225 | 0xffff, /* dst_mask */ | |
226 | false), /* pcrel_offset */ | |
227 | ||
228 | /* A 32 bit reference to a symbol, normally from a data section. */ | |
229 | HOWTO (MIPS_R_REFWORD, /* type */ | |
230 | 0, /* rightshift */ | |
231 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
232 | 32, /* bitsize */ | |
233 | false, /* pc_relative */ | |
234 | 0, /* bitpos */ | |
235 | complain_overflow_bitfield, /* complain_on_overflow */ | |
236 | coff_mips_reloc, /* special_function */ | |
237 | "REFWORD", /* name */ | |
238 | true, /* partial_inplace */ | |
239 | 0xffffffff, /* src_mask */ | |
240 | 0xffffffff, /* dst_mask */ | |
241 | false), /* pcrel_offset */ | |
242 | ||
243 | /* A 26 bit absolute jump address. */ | |
244 | HOWTO (MIPS_R_JMPADDR, /* type */ | |
245 | 2, /* rightshift */ | |
246 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
247 | 26, /* bitsize */ | |
248 | false, /* pc_relative */ | |
249 | 0, /* bitpos */ | |
250 | complain_overflow_dont, /* complain_on_overflow */ | |
251 | /* This needs complex overflow | |
252 | detection, because the upper four | |
253 | bits must match the PC. */ | |
254 | coff_mips_reloc, /* special_function */ | |
255 | "JMPADDR", /* name */ | |
256 | true, /* partial_inplace */ | |
257 | 0x3ffffff, /* src_mask */ | |
258 | 0x3ffffff, /* dst_mask */ | |
259 | false), /* pcrel_offset */ | |
260 | ||
261 | /* The high 16 bits of a symbol value. Handled by the function | |
262 | mips_refhi_reloc. */ | |
263 | HOWTO (MIPS_R_REFHI, /* type */ | |
264 | 16, /* rightshift */ | |
265 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
266 | 16, /* bitsize */ | |
267 | false, /* pc_relative */ | |
268 | 0, /* bitpos */ | |
269 | complain_overflow_bitfield, /* complain_on_overflow */ | |
270 | coff_mips_reloc, /* special_function */ | |
271 | "REFHI", /* name */ | |
272 | true, /* partial_inplace */ | |
273 | 0xffff, /* src_mask */ | |
274 | 0xffff, /* dst_mask */ | |
275 | false), /* pcrel_offset */ | |
276 | ||
277 | /* The low 16 bits of a symbol value. */ | |
278 | HOWTO (MIPS_R_REFLO, /* type */ | |
279 | 0, /* rightshift */ | |
280 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
281 | 16, /* bitsize */ | |
282 | false, /* pc_relative */ | |
283 | 0, /* bitpos */ | |
284 | complain_overflow_dont, /* complain_on_overflow */ | |
285 | coff_mips_reloc, /* special_function */ | |
286 | "REFLO", /* name */ | |
287 | true, /* partial_inplace */ | |
288 | 0xffff, /* src_mask */ | |
289 | 0xffff, /* dst_mask */ | |
290 | false), /* pcrel_offset */ | |
291 | ||
292 | /* A reference to an offset from the gp register. Handled by the | |
293 | function mips_gprel_reloc. */ | |
294 | HOWTO (MIPS_R_GPREL, /* type */ | |
295 | 0, /* rightshift */ | |
296 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
297 | 16, /* bitsize */ | |
298 | false, /* pc_relative */ | |
299 | 0, /* bitpos */ | |
300 | complain_overflow_signed, /* complain_on_overflow */ | |
301 | coff_mips_reloc, /* special_function */ | |
302 | "GPREL", /* name */ | |
303 | true, /* partial_inplace */ | |
304 | 0xffff, /* src_mask */ | |
305 | 0xffff, /* dst_mask */ | |
306 | false), /* pcrel_offset */ | |
307 | ||
308 | /* A reference to a literal using an offset from the gp register. | |
309 | Handled by the function mips_gprel_reloc. */ | |
310 | HOWTO (MIPS_R_LITERAL, /* type */ | |
311 | 0, /* rightshift */ | |
312 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
313 | 16, /* bitsize */ | |
314 | false, /* pc_relative */ | |
315 | 0, /* bitpos */ | |
316 | complain_overflow_signed, /* complain_on_overflow */ | |
317 | coff_mips_reloc, /* special_function */ | |
318 | "LITERAL", /* name */ | |
319 | true, /* partial_inplace */ | |
320 | 0xffff, /* src_mask */ | |
321 | 0xffff, /* dst_mask */ | |
322 | false), /* pcrel_offset */ | |
323 | ||
86033394 NC |
324 | EMPTY_HOWTO (8), |
325 | EMPTY_HOWTO (9), | |
326 | EMPTY_HOWTO (10), | |
327 | EMPTY_HOWTO (11), | |
328 | EMPTY_HOWTO (12), | |
329 | EMPTY_HOWTO (13), | |
330 | EMPTY_HOWTO (14), | |
331 | EMPTY_HOWTO (15), | |
332 | EMPTY_HOWTO (16), | |
333 | EMPTY_HOWTO (17), | |
334 | EMPTY_HOWTO (18), | |
335 | EMPTY_HOWTO (19), | |
336 | EMPTY_HOWTO (20), | |
337 | EMPTY_HOWTO (21), | |
338 | EMPTY_HOWTO (22), | |
339 | EMPTY_HOWTO (23), | |
340 | EMPTY_HOWTO (24), | |
341 | EMPTY_HOWTO (25), | |
342 | EMPTY_HOWTO (26), | |
343 | EMPTY_HOWTO (27), | |
344 | EMPTY_HOWTO (28), | |
345 | EMPTY_HOWTO (29), | |
346 | EMPTY_HOWTO (30), | |
347 | EMPTY_HOWTO (31), | |
348 | EMPTY_HOWTO (32), | |
349 | EMPTY_HOWTO (33), | |
892339ee KH |
350 | HOWTO (MIPS_R_RVA, /* type */ |
351 | 0, /* rightshift */ | |
352 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
353 | 32, /* bitsize */ | |
354 | false, /* pc_relative */ | |
355 | 0, /* bitpos */ | |
17505c5c | 356 | complain_overflow_bitfield, /* complain_on_overflow */ |
892339ee KH |
357 | coff_mips_reloc, /* special_function */ |
358 | "rva32", /* name */ | |
359 | true, /* partial_inplace */ | |
360 | 0xffffffff, /* src_mask */ | |
361 | 0xffffffff, /* dst_mask */ | |
17505c5c | 362 | false), /* pcrel_offset */ |
86033394 NC |
363 | EMPTY_HOWTO (35), |
364 | EMPTY_HOWTO (36), | |
892339ee KH |
365 | HOWTO (MIPS_R_PAIR, /* type */ |
366 | 0, /* rightshift */ | |
367 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
368 | 32, /* bitsize */ | |
369 | false, /* pc_relative */ | |
370 | 0, /* bitpos */ | |
17505c5c | 371 | complain_overflow_bitfield, /* complain_on_overflow */ |
892339ee KH |
372 | coff_mips_reloc, /* special_function */ |
373 | "PAIR", /* name */ | |
374 | true, /* partial_inplace */ | |
375 | 0xffffffff, /* src_mask */ | |
376 | 0xffffffff, /* dst_mask */ | |
17505c5c NC |
377 | false), /* pcrel_offset */ |
378 | }; | |
379 | ||
380 | /* Turn a howto into a reloc nunmber */ | |
381 | ||
382 | #define SELECT_RELOC(x,howto) { x.r_type = howto->type; } | |
383 | #define BADMAG(x) MIPSBADMAG(x) | |
384 | #define MIPS 1 /* Customize coffcode.h */ | |
385 | ||
386 | #define RTYPE2HOWTO(cache_ptr, dst) \ | |
387 | (cache_ptr)->howto = howto_table + (dst)->r_type; | |
388 | ||
389 | /* Compute the addend of a reloc. If the reloc is to a common symbol, | |
390 | the object file contains the value of the common symbol. By the | |
391 | time this is called, the linker may be using a different symbol | |
392 | from a different object file with a different value. Therefore, we | |
393 | hack wildly to locate the original symbol from this file so that we | |
394 | can make the correct adjustment. This macro sets coffsym to the | |
395 | symbol from the original file, and uses it to set the addend value | |
396 | correctly. If this is not a common symbol, the usual addend | |
397 | calculation is done, except that an additional tweak is needed for | |
398 | PC relative relocs. | |
399 | FIXME: This macro refers to symbols and asect; these are from the | |
400 | calling function, not the macro arguments. */ | |
401 | ||
402 | #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \ | |
403 | { \ | |
404 | coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \ | |
405 | if (ptr && bfd_asymbol_bfd (ptr) != abfd) \ | |
406 | coffsym = (obj_symbols (abfd) \ | |
407 | + (cache_ptr->sym_ptr_ptr - symbols)); \ | |
408 | else if (ptr) \ | |
409 | coffsym = coff_symbol_from (abfd, ptr); \ | |
410 | if (coffsym != (coff_symbol_type *) NULL \ | |
411 | && coffsym->native->u.syment.n_scnum == 0) \ | |
412 | cache_ptr->addend = - coffsym->native->u.syment.n_value; \ | |
413 | else if (ptr && bfd_asymbol_bfd (ptr) == abfd \ | |
414 | && ptr->section != (asection *) NULL) \ | |
415 | cache_ptr->addend = - (ptr->section->vma + ptr->value); \ | |
416 | else \ | |
417 | cache_ptr->addend = 0; \ | |
418 | if (ptr && howto_table[reloc.r_type].pc_relative) \ | |
419 | cache_ptr->addend += asect->vma; \ | |
420 | } | |
421 | ||
17505c5c NC |
422 | /* Convert an rtype to howto for the COFF backend linker. */ |
423 | ||
424 | static reloc_howto_type * | |
425 | coff_mips_rtype_to_howto (abfd, sec, rel, h, sym, addendp) | |
86033394 | 426 | bfd *abfd ATTRIBUTE_UNUSED; |
17505c5c NC |
427 | asection *sec; |
428 | struct internal_reloc *rel; | |
429 | struct coff_link_hash_entry *h; | |
430 | struct internal_syment *sym; | |
431 | bfd_vma *addendp; | |
432 | { | |
433 | ||
434 | reloc_howto_type *howto; | |
435 | ||
436 | howto = howto_table + rel->r_type; | |
437 | ||
438 | #ifdef COFF_WITH_PE | |
439 | *addendp = 0; | |
440 | #endif | |
441 | ||
442 | if (howto->pc_relative) | |
443 | *addendp += sec->vma; | |
444 | ||
445 | if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0) | |
446 | { | |
447 | /* This is a common symbol. The section contents include the | |
448 | size (sym->n_value) as an addend. The relocate_section | |
449 | function will be adding in the final value of the symbol. We | |
450 | need to subtract out the current size in order to get the | |
451 | correct result. */ | |
892339ee | 452 | |
17505c5c NC |
453 | BFD_ASSERT (h != NULL); |
454 | ||
455 | #ifndef COFF_WITH_PE | |
456 | /* I think we *do* want to bypass this. If we don't, I have | |
457 | seen some data parameters get the wrong relocation address. | |
458 | If I link two versions with and without this section bypassed | |
459 | and then do a binary comparison, the addresses which are | |
460 | different can be looked up in the map. The case in which | |
461 | this section has been bypassed has addresses which correspond | |
462 | to values I can find in the map. */ | |
463 | *addendp -= sym->n_value; | |
464 | #endif | |
465 | } | |
466 | ||
467 | #ifndef COFF_WITH_PE | |
468 | /* If the output symbol is common (in which case this must be a | |
469 | relocateable link), we need to add in the final size of the | |
470 | common symbol. */ | |
892339ee | 471 | if (h != NULL && h->root.type == bfd_link_hash_common) |
17505c5c NC |
472 | *addendp += h->root.u.c.size; |
473 | #endif | |
474 | ||
475 | #ifdef COFF_WITH_PE | |
476 | if (howto->pc_relative) | |
477 | { | |
478 | *addendp -= 4; | |
479 | ||
480 | /* If the symbol is defined, then the generic code is going to | |
481 | add back the symbol value in order to cancel out an | |
482 | adjustment it made to the addend. However, we set the addend | |
483 | to 0 at the start of this function. We need to adjust here, | |
484 | to avoid the adjustment the generic code will make. FIXME: | |
485 | This is getting a bit hackish. */ | |
486 | if (sym != NULL && sym->n_scnum != 0) | |
487 | *addendp -= sym->n_value; | |
488 | } | |
489 | ||
490 | if (rel->r_type == MIPS_R_RVA) | |
491 | { | |
492 | *addendp -= pe_data(sec->output_section->owner)->pe_opthdr.ImageBase; | |
493 | } | |
494 | #endif | |
495 | ||
496 | return howto; | |
497 | } | |
498 | ||
499 | #define coff_rtype_to_howto coff_mips_rtype_to_howto | |
500 | ||
17505c5c NC |
501 | #define coff_bfd_reloc_type_lookup coff_mips_reloc_type_lookup |
502 | ||
17505c5c NC |
503 | /* Get the howto structure for a generic reloc type. */ |
504 | ||
505 | static reloc_howto_type * | |
506 | coff_mips_reloc_type_lookup (abfd, code) | |
86033394 | 507 | bfd *abfd ATTRIBUTE_UNUSED; |
17505c5c NC |
508 | bfd_reloc_code_real_type code; |
509 | { | |
510 | int mips_type; | |
511 | ||
512 | switch (code) | |
513 | { | |
514 | case BFD_RELOC_16: | |
515 | mips_type = MIPS_R_REFHALF; | |
516 | break; | |
517 | case BFD_RELOC_32: | |
518 | case BFD_RELOC_CTOR: | |
519 | mips_type = MIPS_R_REFWORD; | |
520 | break; | |
521 | case BFD_RELOC_MIPS_JMP: | |
522 | mips_type = MIPS_R_JMPADDR; | |
523 | break; | |
524 | case BFD_RELOC_HI16_S: | |
525 | mips_type = MIPS_R_REFHI; | |
526 | break; | |
527 | case BFD_RELOC_LO16: | |
528 | mips_type = MIPS_R_REFLO; | |
529 | break; | |
530 | case BFD_RELOC_MIPS_GPREL: | |
531 | mips_type = MIPS_R_GPREL; | |
532 | break; | |
533 | case BFD_RELOC_MIPS_LITERAL: | |
534 | mips_type = MIPS_R_LITERAL; | |
535 | break; | |
536 | /* FIXME? | |
537 | case BFD_RELOC_16_PCREL_S2: | |
538 | mips_type = MIPS_R_PCREL16; | |
539 | break; | |
540 | case BFD_RELOC_PCREL_HI16_S: | |
541 | mips_type = MIPS_R_RELHI; | |
542 | break; | |
543 | case BFD_RELOC_PCREL_LO16: | |
544 | mips_type = MIPS_R_RELLO; | |
545 | break; | |
546 | case BFD_RELOC_GPREL32: | |
547 | mips_type = MIPS_R_SWITCH; | |
548 | break; | |
549 | */ | |
550 | case BFD_RELOC_RVA: | |
551 | mips_type = MIPS_R_RVA; | |
552 | break; | |
553 | default: | |
554 | return (reloc_howto_type *) NULL; | |
555 | } | |
556 | ||
557 | return &howto_table[mips_type]; | |
558 | } | |
559 | ||
560 | static void | |
561 | mips_swap_reloc_in (abfd, src, dst) | |
562 | bfd *abfd; | |
563 | PTR src; | |
564 | PTR dst; | |
565 | { | |
566 | static struct internal_reloc pair_prev; | |
567 | RELOC *reloc_src = (RELOC *) src; | |
568 | struct internal_reloc *reloc_dst = (struct internal_reloc *) dst; | |
569 | ||
570 | reloc_dst->r_vaddr = bfd_h_get_32(abfd, (bfd_byte *)reloc_src->r_vaddr); | |
571 | reloc_dst->r_symndx = | |
572 | bfd_h_get_signed_32(abfd, (bfd_byte *) reloc_src->r_symndx); | |
573 | reloc_dst->r_type = bfd_h_get_16(abfd, (bfd_byte *) reloc_src->r_type); | |
574 | reloc_dst->r_size = 0; | |
575 | reloc_dst->r_extern = 0; | |
576 | reloc_dst->r_offset = 0; | |
577 | ||
578 | switch (reloc_dst->r_type) | |
579 | { | |
580 | case MIPS_R_REFHI: | |
581 | pair_prev = *reloc_dst; | |
582 | break; | |
583 | case MIPS_R_PAIR: | |
584 | reloc_dst->r_offset = reloc_dst->r_symndx; | |
585 | if (reloc_dst->r_offset & 0x8000) | |
586 | reloc_dst->r_offset -= 0x10000; | |
892339ee | 587 | /*printf ("dj: pair offset is %08x\n", reloc_dst->r_offset);*/ |
17505c5c NC |
588 | reloc_dst->r_symndx = pair_prev.r_symndx; |
589 | break; | |
590 | } | |
591 | } | |
592 | ||
593 | static unsigned int | |
594 | mips_swap_reloc_out (abfd, src, dst) | |
595 | bfd *abfd; | |
596 | PTR src; | |
597 | PTR dst; | |
598 | { | |
599 | static int prev_offset = 1; | |
600 | static bfd_vma prev_addr = 0; | |
601 | struct internal_reloc *reloc_src = (struct internal_reloc *)src; | |
602 | struct external_reloc *reloc_dst = (struct external_reloc *)dst; | |
603 | ||
604 | switch (reloc_src->r_type) | |
605 | { | |
606 | case MIPS_R_REFHI: | |
607 | prev_addr = reloc_src->r_vaddr; | |
608 | prev_offset = reloc_src->r_offset; | |
609 | break; | |
610 | case MIPS_R_REFLO: | |
611 | if (reloc_src->r_vaddr == prev_addr) | |
612 | { | |
613 | /* FIXME: only slightly hackish. If we see a REFLO pointing to | |
614 | the same address as a REFHI, we assume this is the matching | |
615 | PAIR reloc and output it accordingly. The symndx is really | |
616 | the low 16 bits of the addend */ | |
617 | bfd_h_put_32 (abfd, reloc_src->r_vaddr, | |
618 | (bfd_byte *) reloc_dst->r_vaddr); | |
619 | bfd_h_put_32 (abfd, reloc_src->r_symndx, | |
620 | (bfd_byte *) reloc_dst->r_symndx); | |
621 | ||
622 | bfd_h_put_16(abfd, MIPS_R_PAIR, (bfd_byte *) | |
623 | reloc_dst->r_type); | |
624 | return RELSZ; | |
625 | } | |
626 | break; | |
627 | } | |
628 | ||
629 | bfd_h_put_32(abfd, reloc_src->r_vaddr, (bfd_byte *) reloc_dst->r_vaddr); | |
630 | bfd_h_put_32(abfd, reloc_src->r_symndx, (bfd_byte *) reloc_dst->r_symndx); | |
631 | ||
632 | bfd_h_put_16(abfd, reloc_src->r_type, (bfd_byte *) | |
633 | reloc_dst->r_type); | |
634 | return RELSZ; | |
635 | } | |
636 | ||
637 | #define coff_swap_reloc_in mips_swap_reloc_in | |
638 | #define coff_swap_reloc_out mips_swap_reloc_out | |
639 | #define NO_COFF_RELOCS | |
640 | ||
641 | static boolean | |
642 | coff_pe_mips_relocate_section (output_bfd, info, input_bfd, | |
643 | input_section, contents, relocs, syms, | |
644 | sections) | |
645 | bfd *output_bfd; | |
646 | struct bfd_link_info *info; | |
647 | bfd *input_bfd; | |
648 | asection *input_section; | |
649 | bfd_byte *contents; | |
650 | struct internal_reloc *relocs; | |
651 | struct internal_syment *syms; | |
652 | asection **sections; | |
653 | { | |
17505c5c NC |
654 | bfd_vma gp; |
655 | boolean gp_undefined; | |
656 | size_t adjust; | |
17505c5c NC |
657 | struct internal_reloc *rel; |
658 | struct internal_reloc *rel_end; | |
659 | unsigned int i; | |
660 | boolean got_lo; | |
17505c5c NC |
661 | |
662 | if (info->relocateable) | |
663 | { | |
892339ee | 664 | (*_bfd_error_handler) (_("\ |
17505c5c NC |
665 | %s: `ld -r' not supported with PE MIPS objects\n"), |
666 | bfd_get_filename (input_bfd)); | |
667 | bfd_set_error (bfd_error_bad_value); | |
668 | return false; | |
669 | } | |
670 | ||
671 | BFD_ASSERT (input_bfd->xvec->byteorder | |
672 | == output_bfd->xvec->byteorder); | |
673 | ||
674 | #if 0 | |
892339ee | 675 | printf ("dj: relocate %s(%s) %08x\n", |
17505c5c NC |
676 | input_bfd->filename, input_section->name, |
677 | input_section->output_section->vma + input_section->output_offset); | |
678 | #endif | |
679 | ||
680 | gp = _bfd_get_gp_value (output_bfd); | |
681 | if (gp == 0) | |
682 | gp_undefined = true; | |
683 | else | |
684 | gp_undefined = false; | |
685 | ||
686 | got_lo = false; | |
687 | ||
688 | adjust = 0; | |
689 | ||
690 | rel = relocs; | |
691 | rel_end = rel + input_section->reloc_count; | |
692 | for (i = 0; rel < rel_end; rel++, i++) | |
693 | { | |
694 | long symndx; | |
695 | struct coff_link_hash_entry *h; | |
696 | struct internal_syment *sym; | |
697 | bfd_vma addend = 0; | |
698 | bfd_vma val, tmp, targ, src, low; | |
699 | reloc_howto_type *howto; | |
17505c5c NC |
700 | unsigned char *mem = contents + rel->r_vaddr; |
701 | ||
702 | symndx = rel->r_symndx; | |
703 | ||
704 | if (symndx == -1) | |
705 | { | |
706 | h = NULL; | |
707 | sym = NULL; | |
708 | } | |
709 | else | |
892339ee | 710 | { |
17505c5c NC |
711 | h = obj_coff_sym_hashes (input_bfd)[symndx]; |
712 | sym = syms + symndx; | |
713 | } | |
714 | ||
715 | /* COFF treats common symbols in one of two ways. Either the | |
716 | size of the symbol is included in the section contents, or it | |
717 | is not. We assume that the size is not included, and force | |
718 | the rtype_to_howto function to adjust the addend as needed. */ | |
719 | ||
720 | if (sym != NULL && sym->n_scnum != 0) | |
721 | addend = - sym->n_value; | |
722 | else | |
723 | addend = 0; | |
724 | ||
17505c5c NC |
725 | howto = bfd_coff_rtype_to_howto (input_bfd, input_section, rel, h, |
726 | sym, &addend); | |
727 | if (howto == NULL) | |
728 | return false; | |
729 | ||
730 | /* If we are doing a relocateable link, then we can just ignore | |
731 | a PC relative reloc that is pcrel_offset. It will already | |
732 | have the correct value. If this is not a relocateable link, | |
733 | then we should ignore the symbol value. */ | |
734 | if (howto->pc_relative && howto->pcrel_offset) | |
735 | { | |
736 | if (info->relocateable) | |
737 | continue; | |
738 | if (sym != NULL && sym->n_scnum != 0) | |
739 | addend += sym->n_value; | |
740 | } | |
741 | ||
742 | val = 0; | |
743 | ||
744 | if (h == NULL) | |
745 | { | |
746 | asection *sec; | |
747 | ||
748 | if (symndx == -1) | |
749 | { | |
750 | sec = bfd_abs_section_ptr; | |
751 | val = 0; | |
752 | } | |
753 | else | |
754 | { | |
755 | sec = sections[symndx]; | |
756 | val = (sec->output_section->vma | |
757 | + sec->output_offset | |
758 | + sym->n_value); | |
759 | if (! obj_pe (input_bfd)) | |
760 | val -= sec->vma; | |
761 | } | |
762 | } | |
763 | else | |
764 | { | |
765 | if (h->root.type == bfd_link_hash_defined | |
766 | || h->root.type == bfd_link_hash_defweak) | |
767 | { | |
768 | asection *sec; | |
769 | ||
770 | sec = h->root.u.def.section; | |
771 | val = (h->root.u.def.value | |
772 | + sec->output_section->vma | |
773 | + sec->output_offset); | |
774 | } | |
775 | ||
776 | else if (! info->relocateable) | |
777 | { | |
778 | if (! ((*info->callbacks->undefined_symbol) | |
779 | (info, h->root.root.string, input_bfd, input_section, | |
5cc7c785 | 780 | rel->r_vaddr - input_section->vma, true))) |
17505c5c NC |
781 | return false; |
782 | } | |
783 | } | |
784 | ||
785 | src = rel->r_vaddr + input_section->output_section->vma | |
786 | + input_section->output_offset; | |
787 | #if 0 | |
892339ee | 788 | printf ("dj: reloc %02x %-8s a=%08x/%08x(%08x) v=%08x+%08x %s\n", |
17505c5c NC |
789 | rel->r_type, howto_table[rel->r_type].name, |
790 | src, rel->r_vaddr, *(unsigned long *)mem, val, rel->r_offset, | |
791 | h?h->root.root.string:"(none)"); | |
792 | #endif | |
793 | ||
794 | /* OK, at this point the following variables are set up: | |
795 | src = VMA of the memory we're fixing up | |
796 | mem = pointer to memory we're fixing up | |
797 | val = VMA of what we need to refer to | |
798 | */ | |
799 | ||
892339ee | 800 | #define UI(x) (*_bfd_error_handler) (_("%s: unimplemented %s\n"), \ |
17505c5c NC |
801 | bfd_get_filename (input_bfd), x); \ |
802 | bfd_set_error (bfd_error_bad_value); | |
803 | ||
804 | switch (rel->r_type) | |
805 | { | |
806 | case MIPS_R_ABSOLUTE: | |
807 | /* ignore these */ | |
808 | break; | |
809 | ||
810 | case MIPS_R_REFHALF: | |
811 | UI("refhalf"); | |
812 | break; | |
813 | ||
814 | case MIPS_R_REFWORD: | |
815 | tmp = bfd_get_32(input_bfd, mem); | |
892339ee | 816 | /* printf ("refword: src=%08x targ=%08x+%08x\n", src, tmp, val); */ |
17505c5c NC |
817 | tmp += val; |
818 | bfd_put_32(input_bfd, tmp, mem); | |
819 | break; | |
820 | ||
821 | case MIPS_R_JMPADDR: | |
822 | tmp = bfd_get_32(input_bfd, mem); | |
823 | targ = val + (tmp&0x03ffffff)*4; | |
86033394 | 824 | if ((src & 0xf0000000) != (targ & 0xf0000000)) |
17505c5c | 825 | { |
892339ee | 826 | (*_bfd_error_handler) (_("%s: jump too far away\n"), |
17505c5c NC |
827 | bfd_get_filename (input_bfd)); |
828 | bfd_set_error (bfd_error_bad_value); | |
829 | return false; | |
830 | } | |
831 | tmp &= 0xfc000000; | |
832 | tmp |= (targ/4) & 0x3ffffff; | |
833 | bfd_put_32(input_bfd, tmp, mem); | |
834 | break; | |
835 | ||
836 | case MIPS_R_REFHI: | |
837 | tmp = bfd_get_32(input_bfd, mem); | |
838 | switch (rel[1].r_type) | |
839 | { | |
840 | case MIPS_R_PAIR: | |
841 | /* MS PE object */ | |
842 | targ = val + rel[1].r_offset + ((tmp & 0xffff) << 16); | |
843 | break; | |
844 | case MIPS_R_REFLO: | |
845 | /* GNU COFF object */ | |
846 | low = bfd_get_32(input_bfd, contents + rel[1].r_vaddr); | |
847 | low &= 0xffff; | |
848 | if (low & 0x8000) | |
849 | low -= 0x10000; | |
850 | targ = val + low + ((tmp & 0xffff) << 16); | |
851 | break; | |
852 | default: | |
892339ee | 853 | (*_bfd_error_handler) (_("%s: bad pair/reflo after refhi\n"), |
17505c5c NC |
854 | bfd_get_filename (input_bfd)); |
855 | bfd_set_error (bfd_error_bad_value); | |
856 | return false; | |
857 | } | |
858 | tmp &= 0xffff0000; | |
859 | tmp |= (targ >> 16) & 0xffff; | |
860 | bfd_put_32(input_bfd, tmp, mem); | |
861 | break; | |
862 | ||
863 | case MIPS_R_REFLO: | |
864 | tmp = bfd_get_32(input_bfd, mem); | |
865 | targ = val + (tmp & 0xffff); | |
892339ee | 866 | /* printf ("refword: src=%08x targ=%08x\n", src, targ); */ |
17505c5c NC |
867 | tmp &= 0xffff0000; |
868 | tmp |= targ & 0xffff; | |
869 | bfd_put_32(input_bfd, tmp, mem); | |
870 | break; | |
871 | ||
872 | case MIPS_R_GPREL: | |
873 | case MIPS_R_LITERAL: | |
874 | UI("gprel"); | |
875 | break; | |
876 | ||
877 | case MIPS_R_SECTION: | |
878 | UI("section"); | |
879 | break; | |
880 | ||
881 | case MIPS_R_SECREL: | |
882 | UI("secrel"); | |
883 | break; | |
884 | ||
885 | case MIPS_R_SECRELLO: | |
886 | UI("secrello"); | |
887 | break; | |
888 | ||
889 | case MIPS_R_SECRELHI: | |
890 | UI("secrelhi"); | |
891 | break; | |
892 | ||
893 | case MIPS_R_RVA: | |
894 | tmp = bfd_get_32 (input_bfd, mem); | |
892339ee | 895 | /* printf ("rva: src=%08x targ=%08x+%08x\n", src, tmp, val); */ |
17505c5c | 896 | tmp += val |
86033394 | 897 | - pe_data (input_section->output_section->owner)->pe_opthdr.ImageBase; |
17505c5c NC |
898 | bfd_put_32 (input_bfd, tmp, mem); |
899 | break; | |
900 | ||
901 | case MIPS_R_PAIR: | |
902 | /* ignore these */ | |
903 | break; | |
904 | } | |
905 | } | |
906 | ||
907 | return true; | |
908 | } | |
909 | ||
910 | #define coff_relocate_section coff_pe_mips_relocate_section | |
911 | ||
912 | #ifdef TARGET_UNDERSCORE | |
913 | ||
914 | /* If mips gcc uses underscores for symbol names, then it does not use | |
915 | a leading dot for local labels, so if TARGET_UNDERSCORE is defined | |
916 | we treat all symbols starting with L as local. */ | |
917 | ||
918 | static boolean coff_mips_is_local_label_name PARAMS ((bfd *, const char *)); | |
919 | ||
920 | static boolean | |
921 | coff_mips_is_local_label_name (abfd, name) | |
922 | bfd *abfd; | |
923 | const char *name; | |
924 | { | |
925 | if (name[0] == 'L') | |
926 | return true; | |
927 | ||
928 | return _bfd_coff_is_local_label_name (abfd, name); | |
929 | } | |
930 | ||
931 | #define coff_bfd_is_local_label_name coff_mips_is_local_label_name | |
932 | ||
933 | #endif /* TARGET_UNDERSCORE */ | |
934 | ||
935 | #define COFF_NO_HACK_SCNHDR_SIZE | |
936 | ||
937 | #include "coffcode.h" | |
938 | ||
939 | const bfd_target | |
940 | #ifdef TARGET_SYM | |
941 | TARGET_SYM = | |
942 | #else | |
943 | mipslpe_vec = | |
944 | #endif | |
945 | { | |
946 | #ifdef TARGET_NAME | |
947 | TARGET_NAME, | |
948 | #else | |
949 | "pe-mips", /* name */ | |
950 | #endif | |
951 | bfd_target_coff_flavour, | |
952 | BFD_ENDIAN_LITTLE, /* data byte order is little */ | |
953 | BFD_ENDIAN_LITTLE, /* header byte order is little */ | |
954 | ||
955 | (HAS_RELOC | EXEC_P | /* object flags */ | |
956 | HAS_LINENO | HAS_DEBUG | | |
957 | HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), | |
958 | ||
959 | #ifndef COFF_WITH_PE | |
960 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */ | |
961 | | SEC_CODE | SEC_DATA), | |
962 | #else | |
963 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */ | |
964 | | SEC_CODE | SEC_DATA | |
965 | | SEC_LINK_ONCE | SEC_LINK_DUPLICATES), | |
966 | #endif | |
967 | ||
968 | #ifdef TARGET_UNDERSCORE | |
969 | TARGET_UNDERSCORE, /* leading underscore */ | |
970 | #else | |
971 | 0, /* leading underscore */ | |
972 | #endif | |
973 | '/', /* ar_pad_char */ | |
974 | 15, /* ar_max_namelen */ | |
975 | ||
976 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
977 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
978 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ | |
979 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
980 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
981 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ | |
982 | ||
892339ee | 983 | /* Note that we allow an object file to be treated as a core file as well. */ |
17505c5c NC |
984 | {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ |
985 | bfd_generic_archive_p, coff_object_p}, | |
986 | {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */ | |
987 | bfd_false}, | |
988 | {bfd_false, coff_write_object_contents, /* bfd_write_contents */ | |
989 | _bfd_write_archive_contents, bfd_false}, | |
990 | ||
991 | BFD_JUMP_TABLE_GENERIC (coff), | |
992 | BFD_JUMP_TABLE_COPY (coff), | |
993 | BFD_JUMP_TABLE_CORE (_bfd_nocore), | |
994 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), | |
995 | BFD_JUMP_TABLE_SYMBOLS (coff), | |
996 | BFD_JUMP_TABLE_RELOCS (coff), | |
997 | BFD_JUMP_TABLE_WRITE (coff), | |
998 | BFD_JUMP_TABLE_LINK (coff), | |
999 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
1000 | ||
1001 | NULL, | |
892339ee | 1002 | |
17505c5c NC |
1003 | COFF_SWAP_TABLE |
1004 | }; |