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Merge from gcc:
[binutils.git] / bfd / elfn32-mips.c
blob769c4149812f58de14073ee8bc88b537e1c12511
1 /* MIPS-specific support for 32-bit ELF
2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
3 2003, 2004 Free Software Foundation, Inc.
4
5 Most of the information added by Ian Lance Taylor, Cygnus Support,
6 <ian@cygnus.com>.
7 N32/64 ABI support added by Mark Mitchell, CodeSourcery, LLC.
8 <mark@codesourcery.com>
9 Traditional MIPS targets support added by Koundinya.K, Dansk Data
10 Elektronik & Operations Research Group. <kk@ddeorg.soft.net>
11
12 This file is part of BFD, the Binary File Descriptor library.
13
14 This program is free software; you can redistribute it and/or modify
15 it under the terms of the GNU General Public License as published by
16 the Free Software Foundation; either version 2 of the License, or
17 (at your option) any later version.
18
19 This program is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 GNU General Public License for more details.
23
24 You should have received a copy of the GNU General Public License
25 along with this program; if not, write to the Free Software
26 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
27
28 /* This file handles MIPS ELF targets. SGI Irix 5 uses a slightly
29 different MIPS ELF from other targets. This matters when linking.
30 This file supports both, switching at runtime. */
31
32 #include "bfd.h"
33 #include "sysdep.h"
34 #include "libbfd.h"
35 #include "bfdlink.h"
36 #include "genlink.h"
37 #include "elf-bfd.h"
38 #include "elfxx-mips.h"
39 #include "elf/mips.h"
40
41 /* Get the ECOFF swapping routines. */
42 #include "coff/sym.h"
43 #include "coff/symconst.h"
44 #include "coff/internal.h"
45 #include "coff/ecoff.h"
46 #include "coff/mips.h"
47 #define ECOFF_SIGNED_32
48 #include "ecoffswap.h"
49
50 static bfd_boolean mips_elf_assign_gp
51 (bfd *, bfd_vma *);
52 static bfd_reloc_status_type mips_elf_final_gp
53 (bfd *, asymbol *, bfd_boolean, char **, bfd_vma *);
54 static bfd_reloc_status_type mips_elf_gprel16_reloc
55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
56 static bfd_reloc_status_type mips_elf_literal_reloc
57 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
58 static bfd_reloc_status_type mips_elf_gprel32_reloc
59 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
60 static bfd_reloc_status_type gprel32_with_gp
61 (bfd *, asymbol *, arelent *, asection *, bfd_boolean, void *, bfd_vma);
62 static bfd_reloc_status_type mips_elf_shift6_reloc
63 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
64 static bfd_reloc_status_type mips16_jump_reloc
65 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
66 static bfd_reloc_status_type mips16_gprel_reloc
67 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
68 static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
69 (bfd *, bfd_reloc_code_real_type);
70 static reloc_howto_type *mips_elf_n32_rtype_to_howto
71 (unsigned int, bfd_boolean);
72 static void mips_info_to_howto_rel
73 (bfd *, arelent *, Elf_Internal_Rela *);
74 static void mips_info_to_howto_rela
75 (bfd *, arelent *, Elf_Internal_Rela *);
76 static bfd_boolean mips_elf_sym_is_global
77 (bfd *, asymbol *);
78 static bfd_boolean mips_elf_n32_object_p
79 (bfd *);
80 static bfd_boolean elf32_mips_grok_prstatus
81 (bfd *, Elf_Internal_Note *);
82 static bfd_boolean elf32_mips_grok_psinfo
83 (bfd *, Elf_Internal_Note *);
84 static irix_compat_t elf_n32_mips_irix_compat
85 (bfd *);
86
87 extern const bfd_target bfd_elf32_nbigmips_vec;
88 extern const bfd_target bfd_elf32_nlittlemips_vec;
89
90 /* Nonzero if ABFD is using the N32 ABI. */
91 #define ABI_N32_P(abfd) \
92 ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI2) != 0)
93
94 /* Whether we are trying to be compatible with IRIX at all. */
95 #define SGI_COMPAT(abfd) \
96 (elf_n32_mips_irix_compat (abfd) != ict_none)
97
98 /* The number of local .got entries we reserve. */
99 #define MIPS_RESERVED_GOTNO (2)
100
101 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
102 from smaller values. Start with zero, widen, *then* decrement. */
103 #define MINUS_ONE (((bfd_vma)0) - 1)
104
105 /* The relocation table used for SHT_REL sections. */
106
107 static reloc_howto_type elf_mips_howto_table_rel[] =
108 {
109 /* No relocation. */
110 HOWTO (R_MIPS_NONE, /* type */
111 0, /* rightshift */
112 0, /* size (0 = byte, 1 = short, 2 = long) */
113 0, /* bitsize */
114 FALSE, /* pc_relative */
115 0, /* bitpos */
116 complain_overflow_dont, /* complain_on_overflow */
117 _bfd_mips_elf_generic_reloc, /* special_function */
118 "R_MIPS_NONE", /* name */
119 FALSE, /* partial_inplace */
120 0, /* src_mask */
121 0, /* dst_mask */
122 FALSE), /* pcrel_offset */
123
124 /* 16 bit relocation. */
125 HOWTO (R_MIPS_16, /* type */
126 0, /* rightshift */
127 2, /* size (0 = byte, 1 = short, 2 = long) */
128 16, /* bitsize */
129 FALSE, /* pc_relative */
130 0, /* bitpos */
131 complain_overflow_signed, /* complain_on_overflow */
132 _bfd_mips_elf_generic_reloc, /* special_function */
133 "R_MIPS_16", /* name */
134 TRUE, /* partial_inplace */
135 0x0000ffff, /* src_mask */
136 0x0000ffff, /* dst_mask */
137 FALSE), /* pcrel_offset */
138
139 /* 32 bit relocation. */
140 HOWTO (R_MIPS_32, /* type */
141 0, /* rightshift */
142 2, /* size (0 = byte, 1 = short, 2 = long) */
143 32, /* bitsize */
144 FALSE, /* pc_relative */
145 0, /* bitpos */
146 complain_overflow_dont, /* complain_on_overflow */
147 _bfd_mips_elf_generic_reloc, /* special_function */
148 "R_MIPS_32", /* name */
149 TRUE, /* partial_inplace */
150 0xffffffff, /* src_mask */
151 0xffffffff, /* dst_mask */
152 FALSE), /* pcrel_offset */
153
154 /* 32 bit symbol relative relocation. */
155 HOWTO (R_MIPS_REL32, /* type */
156 0, /* rightshift */
157 2, /* size (0 = byte, 1 = short, 2 = long) */
158 32, /* bitsize */
159 FALSE, /* pc_relative */
160 0, /* bitpos */
161 complain_overflow_dont, /* complain_on_overflow */
162 _bfd_mips_elf_generic_reloc, /* special_function */
163 "R_MIPS_REL32", /* name */
164 TRUE, /* partial_inplace */
165 0xffffffff, /* src_mask */
166 0xffffffff, /* dst_mask */
167 FALSE), /* pcrel_offset */
168
169 /* 26 bit jump address. */
170 HOWTO (R_MIPS_26, /* type */
171 2, /* rightshift */
172 2, /* size (0 = byte, 1 = short, 2 = long) */
173 26, /* bitsize */
174 FALSE, /* pc_relative */
175 0, /* bitpos */
176 complain_overflow_dont, /* complain_on_overflow */
177 /* This needs complex overflow
178 detection, because the upper four
179 bits must match the PC + 4. */
180 _bfd_mips_elf_generic_reloc, /* special_function */
181 "R_MIPS_26", /* name */
182 TRUE, /* partial_inplace */
183 0x03ffffff, /* src_mask */
184 0x03ffffff, /* dst_mask */
185 FALSE), /* pcrel_offset */
186
187 /* R_MIPS_HI16 and R_MIPS_LO16 are unsupported for NewABI REL.
188 However, the native IRIX6 tools use them, so we try our best. */
189
190 /* High 16 bits of symbol value. */
191 HOWTO (R_MIPS_HI16, /* type */
192 16, /* rightshift */
193 2, /* size (0 = byte, 1 = short, 2 = long) */
194 16, /* bitsize */
195 FALSE, /* pc_relative */
196 0, /* bitpos */
197 complain_overflow_dont, /* complain_on_overflow */
198 _bfd_mips_elf_hi16_reloc, /* special_function */
199 "R_MIPS_HI16", /* name */
200 TRUE, /* partial_inplace */
201 0x0000ffff, /* src_mask */
202 0x0000ffff, /* dst_mask */
203 FALSE), /* pcrel_offset */
204
205 /* Low 16 bits of symbol value. */
206 HOWTO (R_MIPS_LO16, /* type */
207 0, /* rightshift */
208 2, /* size (0 = byte, 1 = short, 2 = long) */
209 16, /* bitsize */
210 FALSE, /* pc_relative */
211 0, /* bitpos */
212 complain_overflow_dont, /* complain_on_overflow */
213 _bfd_mips_elf_lo16_reloc, /* special_function */
214 "R_MIPS_LO16", /* name */
215 TRUE, /* partial_inplace */
216 0x0000ffff, /* src_mask */
217 0x0000ffff, /* dst_mask */
218 FALSE), /* pcrel_offset */
219
220 /* GP relative reference. */
221 HOWTO (R_MIPS_GPREL16, /* type */
222 0, /* rightshift */
223 2, /* size (0 = byte, 1 = short, 2 = long) */
224 16, /* bitsize */
225 FALSE, /* pc_relative */
226 0, /* bitpos */
227 complain_overflow_signed, /* complain_on_overflow */
228 mips_elf_gprel16_reloc, /* special_function */
229 "R_MIPS_GPREL16", /* name */
230 TRUE, /* partial_inplace */
231 0x0000ffff, /* src_mask */
232 0x0000ffff, /* dst_mask */
233 FALSE), /* pcrel_offset */
234
235 /* Reference to literal section. */
236 HOWTO (R_MIPS_LITERAL, /* type */
237 0, /* rightshift */
238 2, /* size (0 = byte, 1 = short, 2 = long) */
239 16, /* bitsize */
240 FALSE, /* pc_relative */
241 0, /* bitpos */
242 complain_overflow_signed, /* complain_on_overflow */
243 mips_elf_literal_reloc, /* special_function */
244 "R_MIPS_LITERAL", /* name */
245 TRUE, /* partial_inplace */
246 0x0000ffff, /* src_mask */
247 0x0000ffff, /* dst_mask */
248 FALSE), /* pcrel_offset */
249
250 /* Reference to global offset table. */
251 HOWTO (R_MIPS_GOT16, /* type */
252 0, /* rightshift */
253 2, /* size (0 = byte, 1 = short, 2 = long) */
254 16, /* bitsize */
255 FALSE, /* pc_relative */
256 0, /* bitpos */
257 complain_overflow_signed, /* complain_on_overflow */
258 _bfd_mips_elf_got16_reloc, /* special_function */
259 "R_MIPS_GOT16", /* name */
260 TRUE, /* partial_inplace */
261 0x0000ffff, /* src_mask */
262 0x0000ffff, /* dst_mask */
263 FALSE), /* pcrel_offset */
264
265 /* 16 bit PC relative reference. */
266 HOWTO (R_MIPS_PC16, /* type */
267 0, /* rightshift */
268 2, /* size (0 = byte, 1 = short, 2 = long) */
269 16, /* bitsize */
270 TRUE, /* pc_relative */
271 0, /* bitpos */
272 complain_overflow_signed, /* complain_on_overflow */
273 _bfd_mips_elf_generic_reloc, /* special_function */
274 "R_MIPS_PC16", /* name */
275 TRUE, /* partial_inplace */
276 0x0000ffff, /* src_mask */
277 0x0000ffff, /* dst_mask */
278 TRUE), /* pcrel_offset */
279
280 /* 16 bit call through global offset table. */
281 HOWTO (R_MIPS_CALL16, /* type */
282 0, /* rightshift */
283 2, /* size (0 = byte, 1 = short, 2 = long) */
284 16, /* bitsize */
285 FALSE, /* pc_relative */
286 0, /* bitpos */
287 complain_overflow_signed, /* complain_on_overflow */
288 _bfd_mips_elf_generic_reloc, /* special_function */
289 "R_MIPS_CALL16", /* name */
290 TRUE, /* partial_inplace */
291 0x0000ffff, /* src_mask */
292 0x0000ffff, /* dst_mask */
293 FALSE), /* pcrel_offset */
294
295 /* 32 bit GP relative reference. */
296 HOWTO (R_MIPS_GPREL32, /* type */
297 0, /* rightshift */
298 2, /* size (0 = byte, 1 = short, 2 = long) */
299 32, /* bitsize */
300 FALSE, /* pc_relative */
301 0, /* bitpos */
302 complain_overflow_dont, /* complain_on_overflow */
303 mips_elf_gprel32_reloc, /* special_function */
304 "R_MIPS_GPREL32", /* name */
305 TRUE, /* partial_inplace */
306 0xffffffff, /* src_mask */
307 0xffffffff, /* dst_mask */
308 FALSE), /* pcrel_offset */
309
310 /* The remaining relocs are defined on Irix 5, although they are
311 not defined by the ABI. */
312 EMPTY_HOWTO (13),
313 EMPTY_HOWTO (14),
314 EMPTY_HOWTO (15),
315
316 /* A 5 bit shift field. */
317 HOWTO (R_MIPS_SHIFT5, /* type */
318 0, /* rightshift */
319 2, /* size (0 = byte, 1 = short, 2 = long) */
320 5, /* bitsize */
321 FALSE, /* pc_relative */
322 6, /* bitpos */
323 complain_overflow_bitfield, /* complain_on_overflow */
324 _bfd_mips_elf_generic_reloc, /* special_function */
325 "R_MIPS_SHIFT5", /* name */
326 TRUE, /* partial_inplace */
327 0x000007c0, /* src_mask */
328 0x000007c0, /* dst_mask */
329 FALSE), /* pcrel_offset */
330
331 /* A 6 bit shift field. */
332 HOWTO (R_MIPS_SHIFT6, /* type */
333 0, /* rightshift */
334 2, /* size (0 = byte, 1 = short, 2 = long) */
335 6, /* bitsize */
336 FALSE, /* pc_relative */
337 6, /* bitpos */
338 complain_overflow_bitfield, /* complain_on_overflow */
339 mips_elf_shift6_reloc, /* special_function */
340 "R_MIPS_SHIFT6", /* name */
341 TRUE, /* partial_inplace */
342 0x000007c4, /* src_mask */
343 0x000007c4, /* dst_mask */
344 FALSE), /* pcrel_offset */
345
346 /* A 64 bit relocation. */
347 HOWTO (R_MIPS_64, /* type */
348 0, /* rightshift */
349 4, /* size (0 = byte, 1 = short, 2 = long) */
350 64, /* bitsize */
351 FALSE, /* pc_relative */
352 0, /* bitpos */
353 complain_overflow_dont, /* complain_on_overflow */
354 _bfd_mips_elf_generic_reloc, /* special_function */
355 "R_MIPS_64", /* name */
356 TRUE, /* partial_inplace */
357 MINUS_ONE, /* src_mask */
358 MINUS_ONE, /* dst_mask */
359 FALSE), /* pcrel_offset */
360
361 /* Displacement in the global offset table. */
362 HOWTO (R_MIPS_GOT_DISP, /* type */
363 0, /* rightshift */
364 2, /* size (0 = byte, 1 = short, 2 = long) */
365 16, /* bitsize */
366 FALSE, /* pc_relative */
367 0, /* bitpos */
368 complain_overflow_signed, /* complain_on_overflow */
369 _bfd_mips_elf_generic_reloc, /* special_function */
370 "R_MIPS_GOT_DISP", /* name */
371 TRUE, /* partial_inplace */
372 0x0000ffff, /* src_mask */
373 0x0000ffff, /* dst_mask */
374 FALSE), /* pcrel_offset */
375
376 /* Displacement to page pointer in the global offset table. */
377 HOWTO (R_MIPS_GOT_PAGE, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 16, /* bitsize */
381 FALSE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 _bfd_mips_elf_generic_reloc, /* special_function */
385 "R_MIPS_GOT_PAGE", /* name */
386 TRUE, /* partial_inplace */
387 0x0000ffff, /* src_mask */
388 0x0000ffff, /* dst_mask */
389 FALSE), /* pcrel_offset */
390
391 /* Offset from page pointer in the global offset table. */
392 HOWTO (R_MIPS_GOT_OFST, /* type */
393 0, /* rightshift */
394 2, /* size (0 = byte, 1 = short, 2 = long) */
395 16, /* bitsize */
396 FALSE, /* pc_relative */
397 0, /* bitpos */
398 complain_overflow_signed, /* complain_on_overflow */
399 _bfd_mips_elf_generic_reloc, /* special_function */
400 "R_MIPS_GOT_OFST", /* name */
401 TRUE, /* partial_inplace */
402 0x0000ffff, /* src_mask */
403 0x0000ffff, /* dst_mask */
404 FALSE), /* pcrel_offset */
405
406 /* High 16 bits of displacement in global offset table. */
407 HOWTO (R_MIPS_GOT_HI16, /* type */
408 0, /* rightshift */
409 2, /* size (0 = byte, 1 = short, 2 = long) */
410 16, /* bitsize */
411 FALSE, /* pc_relative */
412 0, /* bitpos */
413 complain_overflow_dont, /* complain_on_overflow */
414 _bfd_mips_elf_generic_reloc, /* special_function */
415 "R_MIPS_GOT_HI16", /* name */
416 TRUE, /* partial_inplace */
417 0x0000ffff, /* src_mask */
418 0x0000ffff, /* dst_mask */
419 FALSE), /* pcrel_offset */
420
421 /* Low 16 bits of displacement in global offset table. */
422 HOWTO (R_MIPS_GOT_LO16, /* type */
423 0, /* rightshift */
424 2, /* size (0 = byte, 1 = short, 2 = long) */
425 16, /* bitsize */
426 FALSE, /* pc_relative */
427 0, /* bitpos */
428 complain_overflow_dont, /* complain_on_overflow */
429 _bfd_mips_elf_generic_reloc, /* special_function */
430 "R_MIPS_GOT_LO16", /* name */
431 TRUE, /* partial_inplace */
432 0x0000ffff, /* src_mask */
433 0x0000ffff, /* dst_mask */
434 FALSE), /* pcrel_offset */
435
436 /* 64 bit subtraction. */
437 HOWTO (R_MIPS_SUB, /* type */
438 0, /* rightshift */
439 4, /* size (0 = byte, 1 = short, 2 = long) */
440 64, /* bitsize */
441 FALSE, /* pc_relative */
442 0, /* bitpos */
443 complain_overflow_dont, /* complain_on_overflow */
444 _bfd_mips_elf_generic_reloc, /* special_function */
445 "R_MIPS_SUB", /* name */
446 TRUE, /* partial_inplace */
447 MINUS_ONE, /* src_mask */
448 MINUS_ONE, /* dst_mask */
449 FALSE), /* pcrel_offset */
450
451 /* Insert the addend as an instruction. */
452 /* FIXME: Not handled correctly. */
453 HOWTO (R_MIPS_INSERT_A, /* type */
454 0, /* rightshift */
455 2, /* size (0 = byte, 1 = short, 2 = long) */
456 32, /* bitsize */
457 FALSE, /* pc_relative */
458 0, /* bitpos */
459 complain_overflow_dont, /* complain_on_overflow */
460 _bfd_mips_elf_generic_reloc, /* special_function */
461 "R_MIPS_INSERT_A", /* name */
462 TRUE, /* partial_inplace */
463 0xffffffff, /* src_mask */
464 0xffffffff, /* dst_mask */
465 FALSE), /* pcrel_offset */
466
467 /* Insert the addend as an instruction, and change all relocations
468 to refer to the old instruction at the address. */
469 /* FIXME: Not handled correctly. */
470 HOWTO (R_MIPS_INSERT_B, /* type */
471 0, /* rightshift */
472 2, /* size (0 = byte, 1 = short, 2 = long) */
473 32, /* bitsize */
474 FALSE, /* pc_relative */
475 0, /* bitpos */
476 complain_overflow_dont, /* complain_on_overflow */
477 _bfd_mips_elf_generic_reloc, /* special_function */
478 "R_MIPS_INSERT_B", /* name */
479 TRUE, /* partial_inplace */
480 0xffffffff, /* src_mask */
481 0xffffffff, /* dst_mask */
482 FALSE), /* pcrel_offset */
483
484 /* Delete a 32 bit instruction. */
485 /* FIXME: Not handled correctly. */
486 HOWTO (R_MIPS_DELETE, /* type */
487 0, /* rightshift */
488 2, /* size (0 = byte, 1 = short, 2 = long) */
489 32, /* bitsize */
490 FALSE, /* pc_relative */
491 0, /* bitpos */
492 complain_overflow_dont, /* complain_on_overflow */
493 _bfd_mips_elf_generic_reloc, /* special_function */
494 "R_MIPS_DELETE", /* name */
495 TRUE, /* partial_inplace */
496 0xffffffff, /* src_mask */
497 0xffffffff, /* dst_mask */
498 FALSE), /* pcrel_offset */
499
500 /* The MIPS ELF64 ABI Draft wants us to support these for REL relocations.
501 We don't, because
502 a) It means building the addend from a R_MIPS_HIGHEST/R_MIPS_HIGHER/
503 R_MIPS_HI16/R_MIPS_LO16 sequence with varying ordering, using
504 fallable heuristics.
505 b) No other NEwABI toolchain actually emits such relocations. */
506 EMPTY_HOWTO (R_MIPS_HIGHER),
507 EMPTY_HOWTO (R_MIPS_HIGHEST),
508
509 /* High 16 bits of displacement in global offset table. */
510 HOWTO (R_MIPS_CALL_HI16, /* type */
511 0, /* rightshift */
512 2, /* size (0 = byte, 1 = short, 2 = long) */
513 16, /* bitsize */
514 FALSE, /* pc_relative */
515 0, /* bitpos */
516 complain_overflow_dont, /* complain_on_overflow */
517 _bfd_mips_elf_generic_reloc, /* special_function */
518 "R_MIPS_CALL_HI16", /* name */
519 TRUE, /* partial_inplace */
520 0x0000ffff, /* src_mask */
521 0x0000ffff, /* dst_mask */
522 FALSE), /* pcrel_offset */
523
524 /* Low 16 bits of displacement in global offset table. */
525 HOWTO (R_MIPS_CALL_LO16, /* type */
526 0, /* rightshift */
527 2, /* size (0 = byte, 1 = short, 2 = long) */
528 16, /* bitsize */
529 FALSE, /* pc_relative */
530 0, /* bitpos */
531 complain_overflow_dont, /* complain_on_overflow */
532 _bfd_mips_elf_generic_reloc, /* special_function */
533 "R_MIPS_CALL_LO16", /* name */
534 TRUE, /* partial_inplace */
535 0x0000ffff, /* src_mask */
536 0x0000ffff, /* dst_mask */
537 FALSE), /* pcrel_offset */
538
539 /* Section displacement. */
540 HOWTO (R_MIPS_SCN_DISP, /* type */
541 0, /* rightshift */
542 2, /* size (0 = byte, 1 = short, 2 = long) */
543 32, /* bitsize */
544 FALSE, /* pc_relative */
545 0, /* bitpos */
546 complain_overflow_dont, /* complain_on_overflow */
547 _bfd_mips_elf_generic_reloc, /* special_function */
548 "R_MIPS_SCN_DISP", /* name */
549 TRUE, /* partial_inplace */
550 0xffffffff, /* src_mask */
551 0xffffffff, /* dst_mask */
552 FALSE), /* pcrel_offset */
553
554 HOWTO (R_MIPS_REL16, /* type */
555 0, /* rightshift */
556 1, /* size (0 = byte, 1 = short, 2 = long) */
557 16, /* bitsize */
558 FALSE, /* pc_relative */
559 0, /* bitpos */
560 complain_overflow_signed, /* complain_on_overflow */
561 _bfd_mips_elf_generic_reloc, /* special_function */
562 "R_MIPS_REL16", /* name */
563 TRUE, /* partial_inplace */
564 0xffff, /* src_mask */
565 0xffff, /* dst_mask */
566 FALSE), /* pcrel_offset */
567
568 /* These two are obsolete. */
569 EMPTY_HOWTO (R_MIPS_ADD_IMMEDIATE),
570 EMPTY_HOWTO (R_MIPS_PJUMP),
571
572 /* Similiar to R_MIPS_REL32, but used for relocations in a GOT section.
573 It must be used for multigot GOT's (and only there). */
574 HOWTO (R_MIPS_RELGOT, /* type */
575 0, /* rightshift */
576 2, /* size (0 = byte, 1 = short, 2 = long) */
577 32, /* bitsize */
578 FALSE, /* pc_relative */
579 0, /* bitpos */
580 complain_overflow_dont, /* complain_on_overflow */
581 _bfd_mips_elf_generic_reloc, /* special_function */
582 "R_MIPS_RELGOT", /* name */
583 TRUE, /* partial_inplace */
584 0xffffffff, /* src_mask */
585 0xffffffff, /* dst_mask */
586 FALSE), /* pcrel_offset */
587
588 /* Protected jump conversion. This is an optimization hint. No
589 relocation is required for correctness. */
590 HOWTO (R_MIPS_JALR, /* type */
591 0, /* rightshift */
592 2, /* size (0 = byte, 1 = short, 2 = long) */
593 32, /* bitsize */
594 FALSE, /* pc_relative */
595 0, /* bitpos */
596 complain_overflow_dont, /* complain_on_overflow */
597 _bfd_mips_elf_generic_reloc, /* special_function */
598 "R_MIPS_JALR", /* name */
599 FALSE, /* partial_inplace */
600 0x00000000, /* src_mask */
601 0x00000000, /* dst_mask */
602 FALSE), /* pcrel_offset */
603 };
604
605 /* The relocation table used for SHT_RELA sections. */
606
607 static reloc_howto_type elf_mips_howto_table_rela[] =
608 {
609 /* No relocation. */
610 HOWTO (R_MIPS_NONE, /* type */
611 0, /* rightshift */
612 0, /* size (0 = byte, 1 = short, 2 = long) */
613 0, /* bitsize */
614 FALSE, /* pc_relative */
615 0, /* bitpos */
616 complain_overflow_dont, /* complain_on_overflow */
617 _bfd_mips_elf_generic_reloc, /* special_function */
618 "R_MIPS_NONE", /* name */
619 FALSE, /* partial_inplace */
620 0, /* src_mask */
621 0, /* dst_mask */
622 FALSE), /* pcrel_offset */
623
624 /* 16 bit relocation. */
625 HOWTO (R_MIPS_16, /* type */
626 0, /* rightshift */
627 2, /* size (0 = byte, 1 = short, 2 = long) */
628 16, /* bitsize */
629 FALSE, /* pc_relative */
630 0, /* bitpos */
631 complain_overflow_signed, /* complain_on_overflow */
632 _bfd_mips_elf_generic_reloc, /* special_function */
633 "R_MIPS_16", /* name */
634 FALSE, /* partial_inplace */
635 0, /* src_mask */
636 0x0000, /* dst_mask */
637 FALSE), /* pcrel_offset */
638
639 /* 32 bit relocation. */
640 HOWTO (R_MIPS_32, /* type */
641 0, /* rightshift */
642 2, /* size (0 = byte, 1 = short, 2 = long) */
643 32, /* bitsize */
644 FALSE, /* pc_relative */
645 0, /* bitpos */
646 complain_overflow_dont, /* complain_on_overflow */
647 _bfd_mips_elf_generic_reloc, /* special_function */
648 "R_MIPS_32", /* name */
649 FALSE, /* partial_inplace */
650 0, /* src_mask */
651 0xffffffff, /* dst_mask */
652 FALSE), /* pcrel_offset */
653
654 /* 32 bit symbol relative relocation. */
655 HOWTO (R_MIPS_REL32, /* type */
656 0, /* rightshift */
657 2, /* size (0 = byte, 1 = short, 2 = long) */
658 32, /* bitsize */
659 FALSE, /* pc_relative */
660 0, /* bitpos */
661 complain_overflow_dont, /* complain_on_overflow */
662 _bfd_mips_elf_generic_reloc, /* special_function */
663 "R_MIPS_REL32", /* name */
664 FALSE, /* partial_inplace */
665 0, /* src_mask */
666 0xffffffff, /* dst_mask */
667 FALSE), /* pcrel_offset */
668
669 /* 26 bit jump address. */
670 HOWTO (R_MIPS_26, /* type */
671 2, /* rightshift */
672 2, /* size (0 = byte, 1 = short, 2 = long) */
673 26, /* bitsize */
674 FALSE, /* pc_relative */
675 0, /* bitpos */
676 complain_overflow_dont, /* complain_on_overflow */
677 /* This needs complex overflow
678 detection, because the upper 36
679 bits must match the PC + 4. */
680 _bfd_mips_elf_generic_reloc, /* special_function */
681 "R_MIPS_26", /* name */
682 FALSE, /* partial_inplace */
683 0, /* src_mask */
684 0x03ffffff, /* dst_mask */
685 FALSE), /* pcrel_offset */
686
687 /* High 16 bits of symbol value. */
688 HOWTO (R_MIPS_HI16, /* type */
689 0, /* rightshift */
690 2, /* size (0 = byte, 1 = short, 2 = long) */
691 16, /* bitsize */
692 FALSE, /* pc_relative */
693 0, /* bitpos */
694 complain_overflow_dont, /* complain_on_overflow */
695 _bfd_mips_elf_generic_reloc, /* special_function */
696 "R_MIPS_HI16", /* name */
697 FALSE, /* partial_inplace */
698 0, /* src_mask */
699 0x0000ffff, /* dst_mask */
700 FALSE), /* pcrel_offset */
701
702 /* Low 16 bits of symbol value. */
703 HOWTO (R_MIPS_LO16, /* type */
704 0, /* rightshift */
705 2, /* size (0 = byte, 1 = short, 2 = long) */
706 16, /* bitsize */
707 FALSE, /* pc_relative */
708 0, /* bitpos */
709 complain_overflow_dont, /* complain_on_overflow */
710 _bfd_mips_elf_generic_reloc, /* special_function */
711 "R_MIPS_LO16", /* name */
712 FALSE, /* partial_inplace */
713 0, /* src_mask */
714 0x0000ffff, /* dst_mask */
715 FALSE), /* pcrel_offset */
716
717 /* GP relative reference. */
718 HOWTO (R_MIPS_GPREL16, /* type */
719 0, /* rightshift */
720 2, /* size (0 = byte, 1 = short, 2 = long) */
721 16, /* bitsize */
722 FALSE, /* pc_relative */
723 0, /* bitpos */
724 complain_overflow_signed, /* complain_on_overflow */
725 mips_elf_gprel16_reloc, /* special_function */
726 "R_MIPS_GPREL16", /* name */
727 FALSE, /* partial_inplace */
728 0, /* src_mask */
729 0x0000ffff, /* dst_mask */
730 FALSE), /* pcrel_offset */
731
732 /* Reference to literal section. */
733 HOWTO (R_MIPS_LITERAL, /* type */
734 0, /* rightshift */
735 2, /* size (0 = byte, 1 = short, 2 = long) */
736 16, /* bitsize */
737 FALSE, /* pc_relative */
738 0, /* bitpos */
739 complain_overflow_signed, /* complain_on_overflow */
740 mips_elf_literal_reloc, /* special_function */
741 "R_MIPS_LITERAL", /* name */
742 FALSE, /* partial_inplace */
743 0, /* src_mask */
744 0x0000ffff, /* dst_mask */
745 FALSE), /* pcrel_offset */
746
747 /* Reference to global offset table. */
748 HOWTO (R_MIPS_GOT16, /* type */
749 0, /* rightshift */
750 2, /* size (0 = byte, 1 = short, 2 = long) */
751 16, /* bitsize */
752 FALSE, /* pc_relative */
753 0, /* bitpos */
754 complain_overflow_signed, /* complain_on_overflow */
755 _bfd_mips_elf_generic_reloc, /* special_function */
756 "R_MIPS_GOT16", /* name */
757 FALSE, /* partial_inplace */
758 0, /* src_mask */
759 0x0000ffff, /* dst_mask */
760 FALSE), /* pcrel_offset */
761
762 /* 16 bit PC relative reference. */
763 HOWTO (R_MIPS_PC16, /* type */
764 0, /* rightshift */
765 2, /* size (0 = byte, 1 = short, 2 = long) */
766 16, /* bitsize */
767 TRUE, /* pc_relative */
768 0, /* bitpos */
769 complain_overflow_signed, /* complain_on_overflow */
770 _bfd_mips_elf_generic_reloc, /* special_function */
771 "R_MIPS_PC16", /* name */
772 FALSE, /* partial_inplace */
773 0, /* src_mask */
774 0x0000ffff, /* dst_mask */
775 TRUE), /* pcrel_offset */
776
777 /* 16 bit call through global offset table. */
778 HOWTO (R_MIPS_CALL16, /* type */
779 0, /* rightshift */
780 2, /* size (0 = byte, 1 = short, 2 = long) */
781 16, /* bitsize */
782 FALSE, /* pc_relative */
783 0, /* bitpos */
784 complain_overflow_signed, /* complain_on_overflow */
785 _bfd_mips_elf_generic_reloc, /* special_function */
786 "R_MIPS_CALL16", /* name */
787 FALSE, /* partial_inplace */
788 0, /* src_mask */
789 0x0000ffff, /* dst_mask */
790 FALSE), /* pcrel_offset */
791
792 /* 32 bit GP relative reference. */
793 HOWTO (R_MIPS_GPREL32, /* type */
794 0, /* rightshift */
795 2, /* size (0 = byte, 1 = short, 2 = long) */
796 32, /* bitsize */
797 FALSE, /* pc_relative */
798 0, /* bitpos */
799 complain_overflow_dont, /* complain_on_overflow */
800 mips_elf_gprel32_reloc, /* special_function */
801 "R_MIPS_GPREL32", /* name */
802 FALSE, /* partial_inplace */
803 0, /* src_mask */
804 0xffffffff, /* dst_mask */
805 FALSE), /* pcrel_offset */
806
807 EMPTY_HOWTO (13),
808 EMPTY_HOWTO (14),
809 EMPTY_HOWTO (15),
810
811 /* A 5 bit shift field. */
812 HOWTO (R_MIPS_SHIFT5, /* type */
813 0, /* rightshift */
814 2, /* size (0 = byte, 1 = short, 2 = long) */
815 5, /* bitsize */
816 FALSE, /* pc_relative */
817 6, /* bitpos */
818 complain_overflow_bitfield, /* complain_on_overflow */
819 _bfd_mips_elf_generic_reloc, /* special_function */
820 "R_MIPS_SHIFT5", /* name */
821 FALSE, /* partial_inplace */
822 0, /* src_mask */
823 0x000007c0, /* dst_mask */
824 FALSE), /* pcrel_offset */
825
826 /* A 6 bit shift field. */
827 HOWTO (R_MIPS_SHIFT6, /* type */
828 0, /* rightshift */
829 2, /* size (0 = byte, 1 = short, 2 = long) */
830 6, /* bitsize */
831 FALSE, /* pc_relative */
832 6, /* bitpos */
833 complain_overflow_bitfield, /* complain_on_overflow */
834 mips_elf_shift6_reloc, /* special_function */
835 "R_MIPS_SHIFT6", /* name */
836 FALSE, /* partial_inplace */
837 0, /* src_mask */
838 0x000007c4, /* dst_mask */
839 FALSE), /* pcrel_offset */
840
841 /* 64 bit relocation. */
842 HOWTO (R_MIPS_64, /* type */
843 0, /* rightshift */
844 4, /* size (0 = byte, 1 = short, 2 = long) */
845 64, /* bitsize */
846 FALSE, /* pc_relative */
847 0, /* bitpos */
848 complain_overflow_dont, /* complain_on_overflow */
849 _bfd_mips_elf_generic_reloc, /* special_function */
850 "R_MIPS_64", /* name */
851 FALSE, /* partial_inplace */
852 0, /* src_mask */
853 MINUS_ONE, /* dst_mask */
854 FALSE), /* pcrel_offset */
855
856 /* Displacement in the global offset table. */
857 HOWTO (R_MIPS_GOT_DISP, /* type */
858 0, /* rightshift */
859 2, /* size (0 = byte, 1 = short, 2 = long) */
860 16, /* bitsize */
861 FALSE, /* pc_relative */
862 0, /* bitpos */
863 complain_overflow_signed, /* complain_on_overflow */
864 _bfd_mips_elf_generic_reloc, /* special_function */
865 "R_MIPS_GOT_DISP", /* name */
866 FALSE, /* partial_inplace */
867 0, /* src_mask */
868 0x0000ffff, /* dst_mask */
869 FALSE), /* pcrel_offset */
870
871 /* Displacement to page pointer in the global offset table. */
872 HOWTO (R_MIPS_GOT_PAGE, /* type */
873 0, /* rightshift */
874 2, /* size (0 = byte, 1 = short, 2 = long) */
875 16, /* bitsize */
876 FALSE, /* pc_relative */
877 0, /* bitpos */
878 complain_overflow_signed, /* complain_on_overflow */
879 _bfd_mips_elf_generic_reloc, /* special_function */
880 "R_MIPS_GOT_PAGE", /* name */
881 FALSE, /* partial_inplace */
882 0, /* src_mask */
883 0x0000ffff, /* dst_mask */
884 FALSE), /* pcrel_offset */
885
886 /* Offset from page pointer in the global offset table. */
887 HOWTO (R_MIPS_GOT_OFST, /* type */
888 0, /* rightshift */
889 2, /* size (0 = byte, 1 = short, 2 = long) */
890 16, /* bitsize */
891 FALSE, /* pc_relative */
892 0, /* bitpos */
893 complain_overflow_signed, /* complain_on_overflow */
894 _bfd_mips_elf_generic_reloc, /* special_function */
895 "R_MIPS_GOT_OFST", /* name */
896 FALSE, /* partial_inplace */
897 0, /* src_mask */
898 0x0000ffff, /* dst_mask */
899 FALSE), /* pcrel_offset */
900
901 /* High 16 bits of displacement in global offset table. */
902 HOWTO (R_MIPS_GOT_HI16, /* type */
903 0, /* rightshift */
904 2, /* size (0 = byte, 1 = short, 2 = long) */
905 16, /* bitsize */
906 FALSE, /* pc_relative */
907 0, /* bitpos */
908 complain_overflow_dont, /* complain_on_overflow */
909 _bfd_mips_elf_generic_reloc, /* special_function */
910 "R_MIPS_GOT_HI16", /* name */
911 FALSE, /* partial_inplace */
912 0, /* src_mask */
913 0x0000ffff, /* dst_mask */
914 FALSE), /* pcrel_offset */
915
916 /* Low 16 bits of displacement in global offset table. */
917 HOWTO (R_MIPS_GOT_LO16, /* type */
918 0, /* rightshift */
919 2, /* size (0 = byte, 1 = short, 2 = long) */
920 16, /* bitsize */
921 FALSE, /* pc_relative */
922 0, /* bitpos */
923 complain_overflow_dont, /* complain_on_overflow */
924 _bfd_mips_elf_generic_reloc, /* special_function */
925 "R_MIPS_GOT_LO16", /* name */
926 FALSE, /* partial_inplace */
927 0, /* src_mask */
928 0x0000ffff, /* dst_mask */
929 FALSE), /* pcrel_offset */
930
931 /* 64 bit subtraction. */
932 HOWTO (R_MIPS_SUB, /* type */
933 0, /* rightshift */
934 4, /* size (0 = byte, 1 = short, 2 = long) */
935 64, /* bitsize */
936 FALSE, /* pc_relative */
937 0, /* bitpos */
938 complain_overflow_dont, /* complain_on_overflow */
939 _bfd_mips_elf_generic_reloc, /* special_function */
940 "R_MIPS_SUB", /* name */
941 FALSE, /* partial_inplace */
942 0, /* src_mask */
943 MINUS_ONE, /* dst_mask */
944 FALSE), /* pcrel_offset */
945
946 /* Insert the addend as an instruction. */
947 /* FIXME: Not handled correctly. */
948 HOWTO (R_MIPS_INSERT_A, /* type */
949 0, /* rightshift */
950 2, /* size (0 = byte, 1 = short, 2 = long) */
951 32, /* bitsize */
952 FALSE, /* pc_relative */
953 0, /* bitpos */
954 complain_overflow_dont, /* complain_on_overflow */
955 _bfd_mips_elf_generic_reloc, /* special_function */
956 "R_MIPS_INSERT_A", /* name */
957 FALSE, /* partial_inplace */
958 0, /* src_mask */
959 0xffffffff, /* dst_mask */
960 FALSE), /* pcrel_offset */
961
962 /* Insert the addend as an instruction, and change all relocations
963 to refer to the old instruction at the address. */
964 /* FIXME: Not handled correctly. */
965 HOWTO (R_MIPS_INSERT_B, /* type */
966 0, /* rightshift */
967 2, /* size (0 = byte, 1 = short, 2 = long) */
968 32, /* bitsize */
969 FALSE, /* pc_relative */
970 0, /* bitpos */
971 complain_overflow_dont, /* complain_on_overflow */
972 _bfd_mips_elf_generic_reloc, /* special_function */
973 "R_MIPS_INSERT_B", /* name */
974 FALSE, /* partial_inplace */
975 0, /* src_mask */
976 0xffffffff, /* dst_mask */
977 FALSE), /* pcrel_offset */
978
979 /* Delete a 32 bit instruction. */
980 /* FIXME: Not handled correctly. */
981 HOWTO (R_MIPS_DELETE, /* type */
982 0, /* rightshift */
983 2, /* size (0 = byte, 1 = short, 2 = long) */
984 32, /* bitsize */
985 FALSE, /* pc_relative */
986 0, /* bitpos */
987 complain_overflow_dont, /* complain_on_overflow */
988 _bfd_mips_elf_generic_reloc, /* special_function */
989 "R_MIPS_DELETE", /* name */
990 FALSE, /* partial_inplace */
991 0, /* src_mask */
992 0xffffffff, /* dst_mask */
993 FALSE), /* pcrel_offset */
994
995 /* Get the higher value of a 64 bit addend. */
996 HOWTO (R_MIPS_HIGHER, /* type */
997 0, /* rightshift */
998 2, /* size (0 = byte, 1 = short, 2 = long) */
999 16, /* bitsize */
1000 FALSE, /* pc_relative */
1001 0, /* bitpos */
1002 complain_overflow_dont, /* complain_on_overflow */
1003 _bfd_mips_elf_generic_reloc, /* special_function */
1004 "R_MIPS_HIGHER", /* name */
1005 FALSE, /* partial_inplace */
1006 0, /* src_mask */
1007 0x0000ffff, /* dst_mask */
1008 FALSE), /* pcrel_offset */
1009
1010 /* Get the highest value of a 64 bit addend. */
1011 HOWTO (R_MIPS_HIGHEST, /* type */
1012 0, /* rightshift */
1013 2, /* size (0 = byte, 1 = short, 2 = long) */
1014 16, /* bitsize */
1015 FALSE, /* pc_relative */
1016 0, /* bitpos */
1017 complain_overflow_dont, /* complain_on_overflow */
1018 _bfd_mips_elf_generic_reloc, /* special_function */
1019 "R_MIPS_HIGHEST", /* name */
1020 FALSE, /* partial_inplace */
1021 0, /* src_mask */
1022 0x0000ffff, /* dst_mask */
1023 FALSE), /* pcrel_offset */
1024
1025 /* High 16 bits of displacement in global offset table. */
1026 HOWTO (R_MIPS_CALL_HI16, /* type */
1027 0, /* rightshift */
1028 2, /* size (0 = byte, 1 = short, 2 = long) */
1029 16, /* bitsize */
1030 FALSE, /* pc_relative */
1031 0, /* bitpos */
1032 complain_overflow_dont, /* complain_on_overflow */
1033 _bfd_mips_elf_generic_reloc, /* special_function */
1034 "R_MIPS_CALL_HI16", /* name */
1035 FALSE, /* partial_inplace */
1036 0, /* src_mask */
1037 0x0000ffff, /* dst_mask */
1038 FALSE), /* pcrel_offset */
1039
1040 /* Low 16 bits of displacement in global offset table. */
1041 HOWTO (R_MIPS_CALL_LO16, /* type */
1042 0, /* rightshift */
1043 2, /* size (0 = byte, 1 = short, 2 = long) */
1044 16, /* bitsize */
1045 FALSE, /* pc_relative */
1046 0, /* bitpos */
1047 complain_overflow_dont, /* complain_on_overflow */
1048 _bfd_mips_elf_generic_reloc, /* special_function */
1049 "R_MIPS_CALL_LO16", /* name */
1050 FALSE, /* partial_inplace */
1051 0, /* src_mask */
1052 0x0000ffff, /* dst_mask */
1053 FALSE), /* pcrel_offset */
1054
1055 /* Section displacement, used by an associated event location section. */
1056 HOWTO (R_MIPS_SCN_DISP, /* type */
1057 0, /* rightshift */
1058 2, /* size (0 = byte, 1 = short, 2 = long) */
1059 32, /* bitsize */
1060 FALSE, /* pc_relative */
1061 0, /* bitpos */
1062 complain_overflow_dont, /* complain_on_overflow */
1063 _bfd_mips_elf_generic_reloc, /* special_function */
1064 "R_MIPS_SCN_DISP", /* name */
1065 FALSE, /* partial_inplace */
1066 0, /* src_mask */
1067 0xffffffff, /* dst_mask */
1068 FALSE), /* pcrel_offset */
1069
1070 /* 16 bit relocation. */
1071 HOWTO (R_MIPS_REL16, /* type */
1072 0, /* rightshift */
1073 1, /* size (0 = byte, 1 = short, 2 = long) */
1074 16, /* bitsize */
1075 FALSE, /* pc_relative */
1076 0, /* bitpos */
1077 complain_overflow_signed, /* complain_on_overflow */
1078 _bfd_mips_elf_generic_reloc, /* special_function */
1079 "R_MIPS_REL16", /* name */
1080 FALSE, /* partial_inplace */
1081 0, /* src_mask */
1082 0xffff, /* dst_mask */
1083 FALSE), /* pcrel_offset */
1084
1085 /* These two are obsolete. */
1086 EMPTY_HOWTO (R_MIPS_ADD_IMMEDIATE),
1087 EMPTY_HOWTO (R_MIPS_PJUMP),
1088
1089 /* Similiar to R_MIPS_REL32, but used for relocations in a GOT section.
1090 It must be used for multigot GOT's (and only there). */
1091 HOWTO (R_MIPS_RELGOT, /* type */
1092 0, /* rightshift */
1093 2, /* size (0 = byte, 1 = short, 2 = long) */
1094 32, /* bitsize */
1095 FALSE, /* pc_relative */
1096 0, /* bitpos */
1097 complain_overflow_dont, /* complain_on_overflow */
1098 _bfd_mips_elf_generic_reloc, /* special_function */
1099 "R_MIPS_RELGOT", /* name */
1100 FALSE, /* partial_inplace */
1101 0, /* src_mask */
1102 0xffffffff, /* dst_mask */
1103 FALSE), /* pcrel_offset */
1104
1105 /* Protected jump conversion. This is an optimization hint. No
1106 relocation is required for correctness. */
1107 HOWTO (R_MIPS_JALR, /* type */
1108 0, /* rightshift */
1109 2, /* size (0 = byte, 1 = short, 2 = long) */
1110 32, /* bitsize */
1111 FALSE, /* pc_relative */
1112 0, /* bitpos */
1113 complain_overflow_dont, /* complain_on_overflow */
1114 _bfd_mips_elf_generic_reloc, /* special_function */
1115 "R_MIPS_JALR", /* name */
1116 FALSE, /* partial_inplace */
1117 0, /* src_mask */
1118 0xffffffff, /* dst_mask */
1119 FALSE), /* pcrel_offset */
1120 };
1121
1122 /* The reloc used for the mips16 jump instruction. */
1123 static reloc_howto_type elf_mips16_jump_howto =
1124 HOWTO (R_MIPS16_26, /* type */
1125 2, /* rightshift */
1126 2, /* size (0 = byte, 1 = short, 2 = long) */
1127 26, /* bitsize */
1128 FALSE, /* pc_relative */
1129 0, /* bitpos */
1130 complain_overflow_dont, /* complain_on_overflow */
1131 /* This needs complex overflow
1132 detection, because the upper four
1133 bits must match the PC. */
1134 mips16_jump_reloc, /* special_function */
1135 "R_MIPS16_26", /* name */
1136 TRUE, /* partial_inplace */
1137 0x3ffffff, /* src_mask */
1138 0x3ffffff, /* dst_mask */
1139 FALSE); /* pcrel_offset */
1140
1141 /* The reloc used for the mips16 gprel instruction. */
1142 static reloc_howto_type elf_mips16_gprel_howto =
1143 HOWTO (R_MIPS16_GPREL, /* type */
1144 0, /* rightshift */
1145 2, /* size (0 = byte, 1 = short, 2 = long) */
1146 16, /* bitsize */
1147 FALSE, /* pc_relative */
1148 0, /* bitpos */
1149 complain_overflow_signed, /* complain_on_overflow */
1150 mips16_gprel_reloc, /* special_function */
1151 "R_MIPS16_GPREL", /* name */
1152 TRUE, /* partial_inplace */
1153 0x07ff001f, /* src_mask */
1154 0x07ff001f, /* dst_mask */
1155 FALSE); /* pcrel_offset */
1156
1157 /* GNU extension to record C++ vtable hierarchy */
1158 static reloc_howto_type elf_mips_gnu_vtinherit_howto =
1159 HOWTO (R_MIPS_GNU_VTINHERIT, /* type */
1160 0, /* rightshift */
1161 2, /* size (0 = byte, 1 = short, 2 = long) */
1162 0, /* bitsize */
1163 FALSE, /* pc_relative */
1164 0, /* bitpos */
1165 complain_overflow_dont, /* complain_on_overflow */
1166 NULL, /* special_function */
1167 "R_MIPS_GNU_VTINHERIT", /* name */
1168 FALSE, /* partial_inplace */
1169 0, /* src_mask */
1170 0, /* dst_mask */
1171 FALSE); /* pcrel_offset */
1172
1173 /* GNU extension to record C++ vtable member usage */
1174 static reloc_howto_type elf_mips_gnu_vtentry_howto =
1175 HOWTO (R_MIPS_GNU_VTENTRY, /* type */
1176 0, /* rightshift */
1177 2, /* size (0 = byte, 1 = short, 2 = long) */
1178 0, /* bitsize */
1179 FALSE, /* pc_relative */
1180 0, /* bitpos */
1181 complain_overflow_dont, /* complain_on_overflow */
1182 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
1183 "R_MIPS_GNU_VTENTRY", /* name */
1184 FALSE, /* partial_inplace */
1185 0, /* src_mask */
1186 0, /* dst_mask */
1187 FALSE); /* pcrel_offset */
1188 \f
1189 /* 16 bit offset for pc-relative branches. */
1190 static reloc_howto_type elf_mips_gnu_rel16_s2 =
1191 HOWTO (R_MIPS_GNU_REL16_S2, /* type */
1192 2, /* rightshift */
1193 2, /* size (0 = byte, 1 = short, 2 = long) */
1194 16, /* bitsize */
1195 TRUE, /* pc_relative */
1196 0, /* bitpos */
1197 complain_overflow_signed, /* complain_on_overflow */
1198 _bfd_mips_elf_generic_reloc, /* special_function */
1199 "R_MIPS_GNU_REL16_S2", /* name */
1200 TRUE, /* partial_inplace */
1201 0x0000ffff, /* src_mask */
1202 0x0000ffff, /* dst_mask */
1203 TRUE); /* pcrel_offset */
1204
1205 /* 16 bit offset for pc-relative branches. */
1206 static reloc_howto_type elf_mips_gnu_rela16_s2 =
1207 HOWTO (R_MIPS_GNU_REL16_S2, /* type */
1208 2, /* rightshift */
1209 2, /* size (0 = byte, 1 = short, 2 = long) */
1210 16, /* bitsize */
1211 TRUE, /* pc_relative */
1212 0, /* bitpos */
1213 complain_overflow_signed, /* complain_on_overflow */
1214 _bfd_mips_elf_generic_reloc, /* special_function */
1215 "R_MIPS_GNU_REL16_S2", /* name */
1216 FALSE, /* partial_inplace */
1217 0, /* src_mask */
1218 0x0000ffff, /* dst_mask */
1219 TRUE); /* pcrel_offset */
1220 \f
1221 /* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a
1222 dangerous relocation. */
1223
1224 static bfd_boolean
1225 mips_elf_assign_gp (bfd *output_bfd, bfd_vma *pgp)
1226 {
1227 unsigned int count;
1228 asymbol **sym;
1229 unsigned int i;
1230
1231 /* If we've already figured out what GP will be, just return it. */
1232 *pgp = _bfd_get_gp_value (output_bfd);
1233 if (*pgp)
1234 return TRUE;
1235
1236 count = bfd_get_symcount (output_bfd);
1237 sym = bfd_get_outsymbols (output_bfd);
1238
1239 /* The linker script will have created a symbol named `_gp' with the
1240 appropriate value. */
1241 if (sym == NULL)
1242 i = count;
1243 else
1244 {
1245 for (i = 0; i < count; i++, sym++)
1246 {
1247 register const char *name;
1248
1249 name = bfd_asymbol_name (*sym);
1250 if (*name == '_' && strcmp (name, "_gp") == 0)
1251 {
1252 *pgp = bfd_asymbol_value (*sym);
1253 _bfd_set_gp_value (output_bfd, *pgp);
1254 break;
1255 }
1256 }
1257 }
1258
1259 if (i >= count)
1260 {
1261 /* Only get the error once. */
1262 *pgp = 4;
1263 _bfd_set_gp_value (output_bfd, *pgp);
1264 return FALSE;
1265 }
1266
1267 return TRUE;
1268 }
1269
1270 /* We have to figure out the gp value, so that we can adjust the
1271 symbol value correctly. We look up the symbol _gp in the output
1272 BFD. If we can't find it, we're stuck. We cache it in the ELF
1273 target data. We don't need to adjust the symbol value for an
1274 external symbol if we are producing relocatable output. */
1275
1276 static bfd_reloc_status_type
1277 mips_elf_final_gp (bfd *output_bfd, asymbol *symbol, bfd_boolean relocatable,
1278 char **error_message, bfd_vma *pgp)
1279 {
1280 if (bfd_is_und_section (symbol->section)
1281 && ! relocatable)
1282 {
1283 *pgp = 0;
1284 return bfd_reloc_undefined;
1285 }
1286
1287 *pgp = _bfd_get_gp_value (output_bfd);
1288 if (*pgp == 0
1289 && (! relocatable
1290 || (symbol->flags & BSF_SECTION_SYM) != 0))
1291 {
1292 if (relocatable)
1293 {
1294 /* Make up a value. */
1295 *pgp = symbol->section->output_section->vma /*+ 0x4000*/;
1296 _bfd_set_gp_value (output_bfd, *pgp);
1297 }
1298 else if (!mips_elf_assign_gp (output_bfd, pgp))
1299 {
1300 *error_message =
1301 (char *) _("GP relative relocation when _gp not defined");
1302 return bfd_reloc_dangerous;
1303 }
1304 }
1305
1306 return bfd_reloc_ok;
1307 }
1308
1309 /* Do a R_MIPS_GPREL16 relocation. This is a 16 bit value which must
1310 become the offset from the gp register. */
1311
1312 static bfd_reloc_status_type
1313 mips_elf_gprel16_reloc (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc_entry,
1314 asymbol *symbol, void *data ATTRIBUTE_UNUSED,
1315 asection *input_section, bfd *output_bfd,
1316 char **error_message ATTRIBUTE_UNUSED)
1317 {
1318 bfd_boolean relocatable;
1319 bfd_reloc_status_type ret;
1320 bfd_vma gp;
1321
1322 if (output_bfd != NULL)
1323 relocatable = TRUE;
1324 else
1325 {
1326 relocatable = FALSE;
1327 output_bfd = symbol->section->output_section->owner;
1328 }
1329
1330 ret = mips_elf_final_gp (output_bfd, symbol, relocatable, error_message,
1331 &gp);
1332 if (ret != bfd_reloc_ok)
1333 return ret;
1334
1335 return _bfd_mips_elf_gprel16_with_gp (abfd, symbol, reloc_entry,
1336 input_section, relocatable,
1337 data, gp);
1338 }
1339
1340 /* Do a R_MIPS_LITERAL relocation. */
1341
1342 static bfd_reloc_status_type
1343 mips_elf_literal_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1344 void *data, asection *input_section, bfd *output_bfd,
1345 char **error_message)
1346 {
1347 bfd_boolean relocatable;
1348 bfd_reloc_status_type ret;
1349 bfd_vma gp;
1350
1351 /* FIXME: The entries in the .lit8 and .lit4 sections should be merged. */
1352 if (output_bfd != NULL)
1353 relocatable = TRUE;
1354 else
1355 {
1356 relocatable = FALSE;
1357 output_bfd = symbol->section->output_section->owner;
1358 }
1359
1360 ret = mips_elf_final_gp (output_bfd, symbol, relocatable, error_message,
1361 &gp);
1362 if (ret != bfd_reloc_ok)
1363 return ret;
1364
1365 return _bfd_mips_elf_gprel16_with_gp (abfd, symbol, reloc_entry,
1366 input_section, relocatable,
1367 data, gp);
1368 }
1369
1370 /* Do a R_MIPS_GPREL32 relocation. This is a 32 bit value which must
1371 become the offset from the gp register. */
1372
1373 static bfd_reloc_status_type
1374 mips_elf_gprel32_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1375 void *data, asection *input_section, bfd *output_bfd,
1376 char **error_message)
1377 {
1378 bfd_boolean relocatable;
1379 bfd_reloc_status_type ret;
1380 bfd_vma gp;
1381
1382 /* R_MIPS_GPREL32 relocations are defined for local symbols only. */
1383 if (output_bfd != NULL
1384 && (symbol->flags & BSF_SECTION_SYM) == 0
1385 && (symbol->flags & BSF_LOCAL) != 0)
1386 {
1387 *error_message = (char *)
1388 _("32bits gp relative relocation occurs for an external symbol");
1389 return bfd_reloc_outofrange;
1390 }
1391
1392 if (output_bfd != NULL)
1393 {
1394 relocatable = TRUE;
1395 gp = _bfd_get_gp_value (output_bfd);
1396 }
1397 else
1398 {
1399 relocatable = FALSE;
1400 output_bfd = symbol->section->output_section->owner;
1401
1402 ret = mips_elf_final_gp (output_bfd, symbol, relocatable,
1403 error_message, &gp);
1404 if (ret != bfd_reloc_ok)
1405 return ret;
1406 }
1407
1408 return gprel32_with_gp (abfd, symbol, reloc_entry, input_section,
1409 relocatable, data, gp);
1410 }
1411
1412 static bfd_reloc_status_type
1413 gprel32_with_gp (bfd *abfd, asymbol *symbol, arelent *reloc_entry,
1414 asection *input_section, bfd_boolean relocatable,
1415 void *data, bfd_vma gp)
1416 {
1417 bfd_vma relocation;
1418 unsigned long val;
1419
1420 if (bfd_is_com_section (symbol->section))
1421 relocation = 0;
1422 else
1423 relocation = symbol->value;
1424
1425 relocation += symbol->section->output_section->vma;
1426 relocation += symbol->section->output_offset;
1427
1428 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
1429 return bfd_reloc_outofrange;
1430
1431 if (reloc_entry->howto->src_mask == 0)
1432 val = 0;
1433 else
1434 val = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
1435
1436 /* Set val to the offset into the section or symbol. */
1437 val += reloc_entry->addend;
1438
1439 /* Adjust val for the final section location and GP value. If we
1440 are producing relocatable output, we don't want to do this for
1441 an external symbol. */
1442 if (! relocatable
1443 || (symbol->flags & BSF_SECTION_SYM) != 0)
1444 val += relocation - gp;
1445
1446 bfd_put_32 (abfd, val, (bfd_byte *) data + reloc_entry->address);
1447
1448 if (relocatable)
1449 reloc_entry->address += input_section->output_offset;
1450
1451 return bfd_reloc_ok;
1452 }
1453
1454 /* Do a R_MIPS_SHIFT6 relocation. The MSB of the shift is stored at bit 2,
1455 the rest is at bits 6-10. The bitpos already got right by the howto. */
1456
1457 static bfd_reloc_status_type
1458 mips_elf_shift6_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1459 void *data, asection *input_section, bfd *output_bfd,
1460 char **error_message)
1461 {
1462 if (reloc_entry->howto->partial_inplace)
1463 {
1464 reloc_entry->addend = ((reloc_entry->addend & 0x00007c0)
1465 | (reloc_entry->addend & 0x00000800) >> 9);
1466 }
1467
1468 return _bfd_mips_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1469 input_section, output_bfd,
1470 error_message);
1471 }
1472 \f
1473 /* Handle a mips16 jump. */
1474
1475 static bfd_reloc_status_type
1476 mips16_jump_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1477 arelent *reloc_entry ATTRIBUTE_UNUSED,
1478 asymbol *symbol ATTRIBUTE_UNUSED,
1479 void *data ATTRIBUTE_UNUSED,
1480 asection *input_section, bfd *output_bfd ATTRIBUTE_UNUSED,
1481 char **error_message ATTRIBUTE_UNUSED)
1482 {
1483 static bfd_boolean warned = FALSE;
1484
1485 /* FIXME. */
1486 if (! warned)
1487 (*_bfd_error_handler)
1488 (_("Linking mips16 objects into %s format is not supported"),
1489 bfd_get_target (input_section->output_section->owner));
1490 warned = TRUE;
1491
1492 return bfd_reloc_undefined;
1493 }
1494
1495 /* Handle a mips16 GP relative reloc. */
1496
1497 static bfd_reloc_status_type
1498 mips16_gprel_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1499 void *data, asection *input_section, bfd *output_bfd,
1500 char **error_message)
1501 {
1502 bfd_boolean relocatable;
1503 bfd_reloc_status_type ret;
1504 bfd_vma gp;
1505 unsigned short extend = 0;
1506 unsigned short insn = 0;
1507 bfd_signed_vma val;
1508 bfd_vma relocation;
1509
1510 if (output_bfd != NULL)
1511 relocatable = TRUE;
1512 else
1513 {
1514 relocatable = FALSE;
1515 output_bfd = symbol->section->output_section->owner;
1516 }
1517
1518 ret = mips_elf_final_gp (output_bfd, symbol, relocatable, error_message,
1519 &gp);
1520 if (ret != bfd_reloc_ok)
1521 return ret;
1522
1523 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
1524 return bfd_reloc_outofrange;
1525
1526 if (bfd_is_com_section (symbol->section))
1527 relocation = 0;
1528 else
1529 relocation = symbol->value;
1530
1531 relocation += symbol->section->output_section->vma;
1532 relocation += symbol->section->output_offset;
1533
1534 /* Set val to the offset into the section or symbol. */
1535 val = reloc_entry->addend;
1536
1537 if (reloc_entry->howto->partial_inplace)
1538 {
1539 /* Pick up the mips16 extend instruction and the real instruction. */
1540 extend = bfd_get_16 (abfd, (bfd_byte *) data + reloc_entry->address);
1541 insn = bfd_get_16 (abfd, (bfd_byte *) data + reloc_entry->address + 2);
1542 val += ((extend & 0x1f) << 11) | (extend & 0x7e0) | (insn & 0x1f);
1543 }
1544
1545 _bfd_mips_elf_sign_extend(val, 16);
1546
1547 /* Adjust val for the final section location and GP value. If we
1548 are producing relocatable output, we don't want to do this for
1549 an external symbol. */
1550 if (! relocatable
1551 || (symbol->flags & BSF_SECTION_SYM) != 0)
1552 val += relocation - gp;
1553
1554 if (reloc_entry->howto->partial_inplace)
1555 {
1556 bfd_put_16 (abfd,
1557 (extend & 0xf800) | ((val >> 11) & 0x1f) | (val & 0x7e0),
1558 (bfd_byte *) data + reloc_entry->address);
1559 bfd_put_16 (abfd,
1560 (insn & 0xffe0) | (val & 0x1f),
1561 (bfd_byte *) data + reloc_entry->address + 2);
1562 }
1563 else
1564 reloc_entry->addend = val;
1565
1566 if (relocatable)
1567 reloc_entry->address += input_section->output_offset;
1568 else if (((val & ~0xffff) != ~0xffff) && ((val & ~0xffff) != 0))
1569 return bfd_reloc_overflow;
1570
1571 return bfd_reloc_ok;
1572 }
1573 \f
1574 /* A mapping from BFD reloc types to MIPS ELF reloc types. */
1575
1576 struct elf_reloc_map {
1577 bfd_reloc_code_real_type bfd_val;
1578 enum elf_mips_reloc_type elf_val;
1579 };
1580
1581 static const struct elf_reloc_map mips_reloc_map[] =
1582 {
1583 { BFD_RELOC_NONE, R_MIPS_NONE },
1584 { BFD_RELOC_16, R_MIPS_16 },
1585 { BFD_RELOC_32, R_MIPS_32 },
1586 /* There is no BFD reloc for R_MIPS_REL32. */
1587 { BFD_RELOC_CTOR, R_MIPS_32 },
1588 { BFD_RELOC_64, R_MIPS_64 },
1589 { BFD_RELOC_16_PCREL, R_MIPS_PC16 },
1590 { BFD_RELOC_HI16_S, R_MIPS_HI16 },
1591 { BFD_RELOC_LO16, R_MIPS_LO16 },
1592 { BFD_RELOC_GPREL16, R_MIPS_GPREL16 },
1593 { BFD_RELOC_GPREL32, R_MIPS_GPREL32 },
1594 { BFD_RELOC_MIPS_JMP, R_MIPS_26 },
1595 { BFD_RELOC_MIPS_LITERAL, R_MIPS_LITERAL },
1596 { BFD_RELOC_MIPS_GOT16, R_MIPS_GOT16 },
1597 { BFD_RELOC_MIPS_CALL16, R_MIPS_CALL16 },
1598 { BFD_RELOC_MIPS_SHIFT5, R_MIPS_SHIFT5 },
1599 { BFD_RELOC_MIPS_SHIFT6, R_MIPS_SHIFT6 },
1600 { BFD_RELOC_MIPS_GOT_DISP, R_MIPS_GOT_DISP },
1601 { BFD_RELOC_MIPS_GOT_PAGE, R_MIPS_GOT_PAGE },
1602 { BFD_RELOC_MIPS_GOT_OFST, R_MIPS_GOT_OFST },
1603 { BFD_RELOC_MIPS_GOT_HI16, R_MIPS_GOT_HI16 },
1604 { BFD_RELOC_MIPS_GOT_LO16, R_MIPS_GOT_LO16 },
1605 { BFD_RELOC_MIPS_SUB, R_MIPS_SUB },
1606 { BFD_RELOC_MIPS_INSERT_A, R_MIPS_INSERT_A },
1607 { BFD_RELOC_MIPS_INSERT_B, R_MIPS_INSERT_B },
1608 { BFD_RELOC_MIPS_DELETE, R_MIPS_DELETE },
1609 { BFD_RELOC_MIPS_HIGHEST, R_MIPS_HIGHEST },
1610 { BFD_RELOC_MIPS_HIGHER, R_MIPS_HIGHER },
1611 { BFD_RELOC_MIPS_CALL_HI16, R_MIPS_CALL_HI16 },
1612 { BFD_RELOC_MIPS_CALL_LO16, R_MIPS_CALL_LO16 },
1613 { BFD_RELOC_MIPS_SCN_DISP, R_MIPS_SCN_DISP },
1614 { BFD_RELOC_MIPS_REL16, R_MIPS_REL16 },
1615 /* Use of R_MIPS_ADD_IMMEDIATE and R_MIPS_PJUMP is deprecated. */
1616 { BFD_RELOC_MIPS_RELGOT, R_MIPS_RELGOT },
1617 { BFD_RELOC_MIPS_JALR, R_MIPS_JALR }
1618 };
1619
1620 /* Given a BFD reloc type, return a howto structure. */
1621
1622 static reloc_howto_type *
1623 bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1624 bfd_reloc_code_real_type code)
1625 {
1626 unsigned int i;
1627 /* FIXME: We default to RELA here instead of choosing the right
1628 relocation variant. */
1629 reloc_howto_type *howto_table = elf_mips_howto_table_rela;
1630
1631 for (i = 0; i < sizeof (mips_reloc_map) / sizeof (struct elf_reloc_map);
1632 i++)
1633 {
1634 if (mips_reloc_map[i].bfd_val == code)
1635 return &howto_table[(int) mips_reloc_map[i].elf_val];
1636 }
1637
1638 switch (code)
1639 {
1640 case BFD_RELOC_MIPS16_JMP:
1641 return &elf_mips16_jump_howto;
1642 case BFD_RELOC_MIPS16_GPREL:
1643 return &elf_mips16_gprel_howto;
1644 case BFD_RELOC_VTABLE_INHERIT:
1645 return &elf_mips_gnu_vtinherit_howto;
1646 case BFD_RELOC_VTABLE_ENTRY:
1647 return &elf_mips_gnu_vtentry_howto;
1648 case BFD_RELOC_16_PCREL_S2:
1649 return &elf_mips_gnu_rela16_s2;
1650 default:
1651 bfd_set_error (bfd_error_bad_value);
1652 return NULL;
1653 }
1654 }
1655
1656 /* Given a MIPS Elf_Internal_Rel, fill in an arelent structure. */
1657
1658 static reloc_howto_type *
1659 mips_elf_n32_rtype_to_howto (unsigned int r_type, bfd_boolean rela_p)
1660 {
1661 switch (r_type)
1662 {
1663 case R_MIPS16_26:
1664 return &elf_mips16_jump_howto;
1665 case R_MIPS16_GPREL:
1666 return &elf_mips16_gprel_howto;
1667 case R_MIPS_GNU_VTINHERIT:
1668 return &elf_mips_gnu_vtinherit_howto;
1669 case R_MIPS_GNU_VTENTRY:
1670 return &elf_mips_gnu_vtentry_howto;
1671 case R_MIPS_GNU_REL16_S2:
1672 if (rela_p)
1673 return &elf_mips_gnu_rela16_s2;
1674 else
1675 return &elf_mips_gnu_rel16_s2;
1676 default:
1677 BFD_ASSERT (r_type < (unsigned int) R_MIPS_max);
1678 if (rela_p)
1679 return &elf_mips_howto_table_rela[r_type];
1680 else
1681 return &elf_mips_howto_table_rel[r_type];
1682 break;
1683 }
1684 }
1685
1686 /* Given a MIPS Elf_Internal_Rel, fill in an arelent structure. */
1687
1688 static void
1689 mips_info_to_howto_rel (bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst)
1690 {
1691 unsigned int r_type;
1692
1693 r_type = ELF32_R_TYPE (dst->r_info);
1694 cache_ptr->howto = mips_elf_n32_rtype_to_howto (r_type, FALSE);
1695
1696 /* The addend for a GPREL16 or LITERAL relocation comes from the GP
1697 value for the object file. We get the addend now, rather than
1698 when we do the relocation, because the symbol manipulations done
1699 by the linker may cause us to lose track of the input BFD. */
1700 if (((*cache_ptr->sym_ptr_ptr)->flags & BSF_SECTION_SYM) != 0
1701 && (r_type == (unsigned int) R_MIPS_GPREL16
1702 || r_type == (unsigned int) R_MIPS_LITERAL))
1703 cache_ptr->addend = elf_gp (abfd);
1704 }
1705
1706 /* Given a MIPS Elf_Internal_Rela, fill in an arelent structure. */
1707
1708 static void
1709 mips_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED,
1710 arelent *cache_ptr, Elf_Internal_Rela *dst)
1711 {
1712 unsigned int r_type;
1713
1714 r_type = ELF32_R_TYPE (dst->r_info);
1715 cache_ptr->howto = mips_elf_n32_rtype_to_howto (r_type, TRUE);
1716 cache_ptr->addend = dst->r_addend;
1717 }
1718 \f
1719 /* Determine whether a symbol is global for the purposes of splitting
1720 the symbol table into global symbols and local symbols. At least
1721 on Irix 5, this split must be between section symbols and all other
1722 symbols. On most ELF targets the split is between static symbols
1723 and externally visible symbols. */
1724
1725 static bfd_boolean
1726 mips_elf_sym_is_global (bfd *abfd ATTRIBUTE_UNUSED, asymbol *sym)
1727 {
1728 if (SGI_COMPAT (abfd))
1729 return (sym->flags & BSF_SECTION_SYM) == 0;
1730 else
1731 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
1732 || bfd_is_und_section (bfd_get_section (sym))
1733 || bfd_is_com_section (bfd_get_section (sym)));
1734 }
1735 \f
1736 /* Set the right machine number for a MIPS ELF file. */
1737
1738 static bfd_boolean
1739 mips_elf_n32_object_p (bfd *abfd)
1740 {
1741 unsigned long mach;
1742
1743 /* Irix 5 and 6 are broken. Object file symbol tables are not always
1744 sorted correctly such that local symbols precede global symbols,
1745 and the sh_info field in the symbol table is not always right. */
1746 if (SGI_COMPAT (abfd))
1747 elf_bad_symtab (abfd) = TRUE;
1748
1749 mach = _bfd_elf_mips_mach (elf_elfheader (abfd)->e_flags);
1750 bfd_default_set_arch_mach (abfd, bfd_arch_mips, mach);
1751
1752 if (! ABI_N32_P(abfd))
1753 return FALSE;
1754
1755 return TRUE;
1756 }
1757 \f
1758 /* Support for core dump NOTE sections. */
1759 static bfd_boolean
1760 elf32_mips_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1761 {
1762 int offset;
1763 unsigned int size;
1764
1765 switch (note->descsz)
1766 {
1767 default:
1768 return FALSE;
1769
1770 case 440: /* Linux/MIPS N32 */
1771 /* pr_cursig */
1772 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1773
1774 /* pr_pid */
1775 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1776
1777 /* pr_reg */
1778 offset = 72;
1779 size = 360;
1780
1781 break;
1782 }
1783
1784 /* Make a ".reg/999" section. */
1785 return _bfd_elfcore_make_pseudosection (abfd, ".reg", size,
1786 note->descpos + offset);
1787 }
1788
1789 static bfd_boolean
1790 elf32_mips_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1791 {
1792 switch (note->descsz)
1793 {
1794 default:
1795 return FALSE;
1796
1797 case 128: /* Linux/MIPS elf_prpsinfo */
1798 elf_tdata (abfd)->core_program
1799 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1800 elf_tdata (abfd)->core_command
1801 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1802 }
1803
1804 /* Note that for some reason, a spurious space is tacked
1805 onto the end of the args in some (at least one anyway)
1806 implementations, so strip it off if it exists. */
1807
1808 {
1809 char *command = elf_tdata (abfd)->core_command;
1810 int n = strlen (command);
1811
1812 if (0 < n && command[n - 1] == ' ')
1813 command[n - 1] = '\0';
1814 }
1815
1816 return TRUE;
1817 }
1818 \f
1819 /* Depending on the target vector we generate some version of Irix
1820 executables or "normal" MIPS ELF ABI executables. */
1821 static irix_compat_t
1822 elf_n32_mips_irix_compat (bfd *abfd)
1823 {
1824 if ((abfd->xvec == &bfd_elf32_nbigmips_vec)
1825 || (abfd->xvec == &bfd_elf32_nlittlemips_vec))
1826 return ict_irix6;
1827 else
1828 return ict_none;
1829 }
1830 \f
1831 /* ECOFF swapping routines. These are used when dealing with the
1832 .mdebug section, which is in the ECOFF debugging format. */
1833 static const struct ecoff_debug_swap mips_elf32_ecoff_debug_swap = {
1834 /* Symbol table magic number. */
1835 magicSym,
1836 /* Alignment of debugging information. E.g., 4. */
1837 4,
1838 /* Sizes of external symbolic information. */
1839 sizeof (struct hdr_ext),
1840 sizeof (struct dnr_ext),
1841 sizeof (struct pdr_ext),
1842 sizeof (struct sym_ext),
1843 sizeof (struct opt_ext),
1844 sizeof (struct fdr_ext),
1845 sizeof (struct rfd_ext),
1846 sizeof (struct ext_ext),
1847 /* Functions to swap in external symbolic data. */
1848 ecoff_swap_hdr_in,
1849 ecoff_swap_dnr_in,
1850 ecoff_swap_pdr_in,
1851 ecoff_swap_sym_in,
1852 ecoff_swap_opt_in,
1853 ecoff_swap_fdr_in,
1854 ecoff_swap_rfd_in,
1855 ecoff_swap_ext_in,
1856 _bfd_ecoff_swap_tir_in,
1857 _bfd_ecoff_swap_rndx_in,
1858 /* Functions to swap out external symbolic data. */
1859 ecoff_swap_hdr_out,
1860 ecoff_swap_dnr_out,
1861 ecoff_swap_pdr_out,
1862 ecoff_swap_sym_out,
1863 ecoff_swap_opt_out,
1864 ecoff_swap_fdr_out,
1865 ecoff_swap_rfd_out,
1866 ecoff_swap_ext_out,
1867 _bfd_ecoff_swap_tir_out,
1868 _bfd_ecoff_swap_rndx_out,
1869 /* Function to read in symbolic data. */
1870 _bfd_mips_elf_read_ecoff_info
1871 };
1872 \f
1873 #define ELF_ARCH bfd_arch_mips
1874 #define ELF_MACHINE_CODE EM_MIPS
1875
1876 #define elf_backend_collect TRUE
1877 #define elf_backend_type_change_ok TRUE
1878 #define elf_backend_can_gc_sections TRUE
1879 #define elf_info_to_howto mips_info_to_howto_rela
1880 #define elf_info_to_howto_rel mips_info_to_howto_rel
1881 #define elf_backend_sym_is_global mips_elf_sym_is_global
1882 #define elf_backend_object_p mips_elf_n32_object_p
1883 #define elf_backend_symbol_processing _bfd_mips_elf_symbol_processing
1884 #define elf_backend_section_processing _bfd_mips_elf_section_processing
1885 #define elf_backend_section_from_shdr _bfd_mips_elf_section_from_shdr
1886 #define elf_backend_fake_sections _bfd_mips_elf_fake_sections
1887 #define elf_backend_section_from_bfd_section \
1888 _bfd_mips_elf_section_from_bfd_section
1889 #define elf_backend_add_symbol_hook _bfd_mips_elf_add_symbol_hook
1890 #define elf_backend_link_output_symbol_hook \
1891 _bfd_mips_elf_link_output_symbol_hook
1892 #define elf_backend_create_dynamic_sections \
1893 _bfd_mips_elf_create_dynamic_sections
1894 #define elf_backend_check_relocs _bfd_mips_elf_check_relocs
1895 #define elf_backend_adjust_dynamic_symbol \
1896 _bfd_mips_elf_adjust_dynamic_symbol
1897 #define elf_backend_always_size_sections \
1898 _bfd_mips_elf_always_size_sections
1899 #define elf_backend_size_dynamic_sections \
1900 _bfd_mips_elf_size_dynamic_sections
1901 #define elf_backend_relocate_section _bfd_mips_elf_relocate_section
1902 #define elf_backend_finish_dynamic_symbol \
1903 _bfd_mips_elf_finish_dynamic_symbol
1904 #define elf_backend_finish_dynamic_sections \
1905 _bfd_mips_elf_finish_dynamic_sections
1906 #define elf_backend_final_write_processing \
1907 _bfd_mips_elf_final_write_processing
1908 #define elf_backend_additional_program_headers \
1909 _bfd_mips_elf_additional_program_headers
1910 #define elf_backend_modify_segment_map _bfd_mips_elf_modify_segment_map
1911 #define elf_backend_gc_mark_hook _bfd_mips_elf_gc_mark_hook
1912 #define elf_backend_gc_sweep_hook _bfd_mips_elf_gc_sweep_hook
1913 #define elf_backend_copy_indirect_symbol \
1914 _bfd_mips_elf_copy_indirect_symbol
1915 #define elf_backend_hide_symbol _bfd_mips_elf_hide_symbol
1916 #define elf_backend_grok_prstatus elf32_mips_grok_prstatus
1917 #define elf_backend_grok_psinfo elf32_mips_grok_psinfo
1918 #define elf_backend_ecoff_debug_swap &mips_elf32_ecoff_debug_swap
1919
1920 #define elf_backend_got_header_size (4 * MIPS_RESERVED_GOTNO)
1921
1922 /* MIPS n32 ELF can use a mixture of REL and RELA, but some Relocations
1923 work better/work only in RELA, so we default to this. */
1924 #define elf_backend_may_use_rel_p 1
1925 #define elf_backend_may_use_rela_p 1
1926 #define elf_backend_default_use_rela_p 1
1927 #define elf_backend_sign_extend_vma TRUE
1928
1929 #define elf_backend_discard_info _bfd_mips_elf_discard_info
1930 #define elf_backend_ignore_discarded_relocs \
1931 _bfd_mips_elf_ignore_discarded_relocs
1932 #define elf_backend_write_section _bfd_mips_elf_write_section
1933 #define elf_backend_mips_irix_compat elf_n32_mips_irix_compat
1934 #define elf_backend_mips_rtype_to_howto mips_elf_n32_rtype_to_howto
1935 #define bfd_elf32_find_nearest_line _bfd_mips_elf_find_nearest_line
1936 #define bfd_elf32_new_section_hook _bfd_mips_elf_new_section_hook
1937 #define bfd_elf32_set_section_contents _bfd_mips_elf_set_section_contents
1938 #define bfd_elf32_bfd_get_relocated_section_contents \
1939 _bfd_elf_mips_get_relocated_section_contents
1940 #define bfd_elf32_bfd_link_hash_table_create \
1941 _bfd_mips_elf_link_hash_table_create
1942 #define bfd_elf32_bfd_final_link _bfd_mips_elf_final_link
1943 #define bfd_elf32_bfd_merge_private_bfd_data \
1944 _bfd_mips_elf_merge_private_bfd_data
1945 #define bfd_elf32_bfd_set_private_flags _bfd_mips_elf_set_private_flags
1946 #define bfd_elf32_bfd_print_private_bfd_data \
1947 _bfd_mips_elf_print_private_bfd_data
1948 #define bfd_elf32_bfd_relax_section _bfd_mips_relax_section
1949
1950 /* Support for SGI-ish mips targets using n32 ABI. */
1951
1952 #define TARGET_LITTLE_SYM bfd_elf32_nlittlemips_vec
1953 #define TARGET_LITTLE_NAME "elf32-nlittlemips"
1954 #define TARGET_BIG_SYM bfd_elf32_nbigmips_vec
1955 #define TARGET_BIG_NAME "elf32-nbigmips"
1956
1957 /* The SVR4 MIPS ABI says that this should be 0x10000, but Irix 5 uses
1958 a value of 0x1000, and we are compatible.
1959 FIXME: How does this affect NewABI? */
1960 #define ELF_MAXPAGESIZE 0x1000
1961
1962 #include "elf32-target.h"
1963
1964 /* Support for traditional mips targets using n32 ABI. */
1965 #undef TARGET_LITTLE_SYM
1966 #undef TARGET_LITTLE_NAME
1967 #undef TARGET_BIG_SYM
1968 #undef TARGET_BIG_NAME
1969
1970 #undef ELF_MAXPAGESIZE
1971
1972 #define TARGET_LITTLE_SYM bfd_elf32_ntradlittlemips_vec
1973 #define TARGET_LITTLE_NAME "elf32-ntradlittlemips"
1974 #define TARGET_BIG_SYM bfd_elf32_ntradbigmips_vec
1975 #define TARGET_BIG_NAME "elf32-ntradbigmips"
1976
1977 /* The SVR4 MIPS ABI says that this should be 0x10000, and Linux uses
1978 page sizes of up to that limit, so we need to respect it. */
1979 #define ELF_MAXPAGESIZE 0x10000
1980 #define elf32_bed elf32_tradbed
1981
1982 /* Include the target file again for this target. */
1983 #include "elf32-target.h"
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