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[deliverable/binutils-gdb.git] / bfd / elfn32-mips.c
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 0, /* dst_mask */
1119 FALSE), /* pcrel_offset */
1120 };
1121
1122 static reloc_howto_type elf_mips16_howto_table_rel[] =
1123 {
1124 /* The reloc used for the mips16 jump instruction. */
1125 HOWTO (R_MIPS16_26, /* type */
1126 2, /* rightshift */
1127 2, /* size (0 = byte, 1 = short, 2 = long) */
1128 26, /* bitsize */
1129 FALSE, /* pc_relative */
1130 0, /* bitpos */
1131 complain_overflow_dont, /* complain_on_overflow */
1132 /* This needs complex overflow
1133 detection, because the upper four
1134 bits must match the PC. */
1135 mips16_jump_reloc, /* special_function */
1136 "R_MIPS16_26", /* name */
1137 TRUE, /* partial_inplace */
1138 0x3ffffff, /* src_mask */
1139 0x3ffffff, /* dst_mask */
1140 FALSE), /* pcrel_offset */
1141
1142 /* The reloc used for the mips16 gprel instruction. */
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 0x0000ffff, /* src_mask */
1154 0x0000ffff, /* dst_mask */
1155 FALSE), /* pcrel_offset */
1156
1157 /* A placeholder for MIPS16 reference to global offset table. */
1158 EMPTY_HOWTO (R_MIPS16_GOT16),
1159
1160 /* A placeholder for MIPS16 16 bit call through global offset table. */
1161 EMPTY_HOWTO (R_MIPS16_CALL16),
1162
1163 /* MIPS16 high 16 bits of symbol value. */
1164 HOWTO (R_MIPS16_HI16, /* type */
1165 16, /* rightshift */
1166 2, /* size (0 = byte, 1 = short, 2 = long) */
1167 16, /* bitsize */
1168 FALSE, /* pc_relative */
1169 0, /* bitpos */
1170 complain_overflow_dont, /* complain_on_overflow */
1171 _bfd_mips_elf_hi16_reloc, /* special_function */
1172 "R_MIPS16_HI16", /* name */
1173 TRUE, /* partial_inplace */
1174 0x0000ffff, /* src_mask */
1175 0x0000ffff, /* dst_mask */
1176 FALSE), /* pcrel_offset */
1177
1178 /* MIPS16 low 16 bits of symbol value. */
1179 HOWTO (R_MIPS16_LO16, /* type */
1180 0, /* rightshift */
1181 2, /* size (0 = byte, 1 = short, 2 = long) */
1182 16, /* bitsize */
1183 FALSE, /* pc_relative */
1184 0, /* bitpos */
1185 complain_overflow_dont, /* complain_on_overflow */
1186 _bfd_mips_elf_lo16_reloc, /* special_function */
1187 "R_MIPS16_LO16", /* name */
1188 TRUE, /* partial_inplace */
1189 0x0000ffff, /* src_mask */
1190 0x0000ffff, /* dst_mask */
1191 FALSE), /* pcrel_offset */
1192 };
1193
1194 static reloc_howto_type elf_mips16_howto_table_rela[] =
1195 {
1196 /* The reloc used for the mips16 jump instruction. */
1197 HOWTO (R_MIPS16_26, /* type */
1198 2, /* rightshift */
1199 2, /* size (0 = byte, 1 = short, 2 = long) */
1200 26, /* bitsize */
1201 FALSE, /* pc_relative */
1202 0, /* bitpos */
1203 complain_overflow_dont, /* complain_on_overflow */
1204 /* This needs complex overflow
1205 detection, because the upper four
1206 bits must match the PC. */
1207 mips16_jump_reloc, /* special_function */
1208 "R_MIPS16_26", /* name */
1209 FALSE, /* partial_inplace */
1210 0x3ffffff, /* src_mask */
1211 0x3ffffff, /* dst_mask */
1212 FALSE), /* pcrel_offset */
1213
1214 /* The reloc used for the mips16 gprel instruction. */
1215 HOWTO (R_MIPS16_GPREL, /* type */
1216 0, /* rightshift */
1217 2, /* size (0 = byte, 1 = short, 2 = long) */
1218 16, /* bitsize */
1219 FALSE, /* pc_relative */
1220 0, /* bitpos */
1221 complain_overflow_signed, /* complain_on_overflow */
1222 mips16_gprel_reloc, /* special_function */
1223 "R_MIPS16_GPREL", /* name */
1224 FALSE, /* partial_inplace */
1225 0x0000ffff, /* src_mask */
1226 0x0000ffff, /* dst_mask */
1227 FALSE), /* pcrel_offset */
1228
1229 /* A placeholder for MIPS16 reference to global offset table. */
1230 EMPTY_HOWTO (R_MIPS16_GOT16),
1231
1232 /* A placeholder for MIPS16 16 bit call through global offset table. */
1233 EMPTY_HOWTO (R_MIPS16_CALL16),
1234
1235 /* MIPS16 high 16 bits of symbol value. */
1236 HOWTO (R_MIPS16_HI16, /* type */
1237 16, /* rightshift */
1238 2, /* size (0 = byte, 1 = short, 2 = long) */
1239 16, /* bitsize */
1240 FALSE, /* pc_relative */
1241 0, /* bitpos */
1242 complain_overflow_dont, /* complain_on_overflow */
1243 _bfd_mips_elf_hi16_reloc, /* special_function */
1244 "R_MIPS16_HI16", /* name */
1245 FALSE, /* partial_inplace */
1246 0x0000ffff, /* src_mask */
1247 0x0000ffff, /* dst_mask */
1248 FALSE), /* pcrel_offset */
1249
1250 /* MIPS16 low 16 bits of symbol value. */
1251 HOWTO (R_MIPS16_LO16, /* type */
1252 0, /* rightshift */
1253 2, /* size (0 = byte, 1 = short, 2 = long) */
1254 16, /* bitsize */
1255 FALSE, /* pc_relative */
1256 0, /* bitpos */
1257 complain_overflow_dont, /* complain_on_overflow */
1258 _bfd_mips_elf_lo16_reloc, /* special_function */
1259 "R_MIPS16_LO16", /* name */
1260 FALSE, /* partial_inplace */
1261 0x0000ffff, /* src_mask */
1262 0x0000ffff, /* dst_mask */
1263 FALSE), /* pcrel_offset */
1264 };
1265
1266 /* GNU extension to record C++ vtable hierarchy */
1267 static reloc_howto_type elf_mips_gnu_vtinherit_howto =
1268 HOWTO (R_MIPS_GNU_VTINHERIT, /* type */
1269 0, /* rightshift */
1270 2, /* size (0 = byte, 1 = short, 2 = long) */
1271 0, /* bitsize */
1272 FALSE, /* pc_relative */
1273 0, /* bitpos */
1274 complain_overflow_dont, /* complain_on_overflow */
1275 NULL, /* special_function */
1276 "R_MIPS_GNU_VTINHERIT", /* name */
1277 FALSE, /* partial_inplace */
1278 0, /* src_mask */
1279 0, /* dst_mask */
1280 FALSE); /* pcrel_offset */
1281
1282 /* GNU extension to record C++ vtable member usage */
1283 static reloc_howto_type elf_mips_gnu_vtentry_howto =
1284 HOWTO (R_MIPS_GNU_VTENTRY, /* type */
1285 0, /* rightshift */
1286 2, /* size (0 = byte, 1 = short, 2 = long) */
1287 0, /* bitsize */
1288 FALSE, /* pc_relative */
1289 0, /* bitpos */
1290 complain_overflow_dont, /* complain_on_overflow */
1291 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
1292 "R_MIPS_GNU_VTENTRY", /* name */
1293 FALSE, /* partial_inplace */
1294 0, /* src_mask */
1295 0, /* dst_mask */
1296 FALSE); /* pcrel_offset */
1297 \f
1298 /* 16 bit offset for pc-relative branches. */
1299 static reloc_howto_type elf_mips_gnu_rel16_s2 =
1300 HOWTO (R_MIPS_GNU_REL16_S2, /* type */
1301 2, /* rightshift */
1302 2, /* size (0 = byte, 1 = short, 2 = long) */
1303 16, /* bitsize */
1304 TRUE, /* pc_relative */
1305 0, /* bitpos */
1306 complain_overflow_signed, /* complain_on_overflow */
1307 _bfd_mips_elf_generic_reloc, /* special_function */
1308 "R_MIPS_GNU_REL16_S2", /* name */
1309 TRUE, /* partial_inplace */
1310 0x0000ffff, /* src_mask */
1311 0x0000ffff, /* dst_mask */
1312 TRUE); /* pcrel_offset */
1313
1314 /* 16 bit offset for pc-relative branches. */
1315 static reloc_howto_type elf_mips_gnu_rela16_s2 =
1316 HOWTO (R_MIPS_GNU_REL16_S2, /* type */
1317 2, /* rightshift */
1318 2, /* size (0 = byte, 1 = short, 2 = long) */
1319 16, /* bitsize */
1320 TRUE, /* pc_relative */
1321 0, /* bitpos */
1322 complain_overflow_signed, /* complain_on_overflow */
1323 _bfd_mips_elf_generic_reloc, /* special_function */
1324 "R_MIPS_GNU_REL16_S2", /* name */
1325 FALSE, /* partial_inplace */
1326 0, /* src_mask */
1327 0x0000ffff, /* dst_mask */
1328 TRUE); /* pcrel_offset */
1329 \f
1330 /* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a
1331 dangerous relocation. */
1332
1333 static bfd_boolean
1334 mips_elf_assign_gp (bfd *output_bfd, bfd_vma *pgp)
1335 {
1336 unsigned int count;
1337 asymbol **sym;
1338 unsigned int i;
1339
1340 /* If we've already figured out what GP will be, just return it. */
1341 *pgp = _bfd_get_gp_value (output_bfd);
1342 if (*pgp)
1343 return TRUE;
1344
1345 count = bfd_get_symcount (output_bfd);
1346 sym = bfd_get_outsymbols (output_bfd);
1347
1348 /* The linker script will have created a symbol named `_gp' with the
1349 appropriate value. */
1350 if (sym == NULL)
1351 i = count;
1352 else
1353 {
1354 for (i = 0; i < count; i++, sym++)
1355 {
1356 register const char *name;
1357
1358 name = bfd_asymbol_name (*sym);
1359 if (*name == '_' && strcmp (name, "_gp") == 0)
1360 {
1361 *pgp = bfd_asymbol_value (*sym);
1362 _bfd_set_gp_value (output_bfd, *pgp);
1363 break;
1364 }
1365 }
1366 }
1367
1368 if (i >= count)
1369 {
1370 /* Only get the error once. */
1371 *pgp = 4;
1372 _bfd_set_gp_value (output_bfd, *pgp);
1373 return FALSE;
1374 }
1375
1376 return TRUE;
1377 }
1378
1379 /* We have to figure out the gp value, so that we can adjust the
1380 symbol value correctly. We look up the symbol _gp in the output
1381 BFD. If we can't find it, we're stuck. We cache it in the ELF
1382 target data. We don't need to adjust the symbol value for an
1383 external symbol if we are producing relocatable output. */
1384
1385 static bfd_reloc_status_type
1386 mips_elf_final_gp (bfd *output_bfd, asymbol *symbol, bfd_boolean relocatable,
1387 char **error_message, bfd_vma *pgp)
1388 {
1389 if (bfd_is_und_section (symbol->section)
1390 && ! relocatable)
1391 {
1392 *pgp = 0;
1393 return bfd_reloc_undefined;
1394 }
1395
1396 *pgp = _bfd_get_gp_value (output_bfd);
1397 if (*pgp == 0
1398 && (! relocatable
1399 || (symbol->flags & BSF_SECTION_SYM) != 0))
1400 {
1401 if (relocatable)
1402 {
1403 /* Make up a value. */
1404 *pgp = symbol->section->output_section->vma /*+ 0x4000*/;
1405 _bfd_set_gp_value (output_bfd, *pgp);
1406 }
1407 else if (!mips_elf_assign_gp (output_bfd, pgp))
1408 {
1409 *error_message =
1410 (char *) _("GP relative relocation when _gp not defined");
1411 return bfd_reloc_dangerous;
1412 }
1413 }
1414
1415 return bfd_reloc_ok;
1416 }
1417
1418 /* Do a R_MIPS_GPREL16 relocation. This is a 16 bit value which must
1419 become the offset from the gp register. */
1420
1421 static bfd_reloc_status_type
1422 mips_elf_gprel16_reloc (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc_entry,
1423 asymbol *symbol, void *data ATTRIBUTE_UNUSED,
1424 asection *input_section, bfd *output_bfd,
1425 char **error_message ATTRIBUTE_UNUSED)
1426 {
1427 bfd_boolean relocatable;
1428 bfd_reloc_status_type ret;
1429 bfd_vma gp;
1430
1431 if (output_bfd != NULL)
1432 relocatable = TRUE;
1433 else
1434 {
1435 relocatable = FALSE;
1436 output_bfd = symbol->section->output_section->owner;
1437 }
1438
1439 ret = mips_elf_final_gp (output_bfd, symbol, relocatable, error_message,
1440 &gp);
1441 if (ret != bfd_reloc_ok)
1442 return ret;
1443
1444 return _bfd_mips_elf_gprel16_with_gp (abfd, symbol, reloc_entry,
1445 input_section, relocatable,
1446 data, gp);
1447 }
1448
1449 /* Do a R_MIPS_LITERAL relocation. */
1450
1451 static bfd_reloc_status_type
1452 mips_elf_literal_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1453 void *data, asection *input_section, bfd *output_bfd,
1454 char **error_message)
1455 {
1456 bfd_boolean relocatable;
1457 bfd_reloc_status_type ret;
1458 bfd_vma gp;
1459
1460 /* R_MIPS_LITERAL relocations are defined for local symbols only. */
1461 if (output_bfd != NULL
1462 && (symbol->flags & BSF_SECTION_SYM) == 0
1463 && (symbol->flags & BSF_LOCAL) != 0)
1464 {
1465 *error_message = (char *)
1466 _("literal relocation occurs for an external symbol");
1467 return bfd_reloc_outofrange;
1468 }
1469
1470 /* FIXME: The entries in the .lit8 and .lit4 sections should be merged. */
1471 if (output_bfd != NULL)
1472 relocatable = TRUE;
1473 else
1474 {
1475 relocatable = FALSE;
1476 output_bfd = symbol->section->output_section->owner;
1477 }
1478
1479 ret = mips_elf_final_gp (output_bfd, symbol, relocatable, error_message,
1480 &gp);
1481 if (ret != bfd_reloc_ok)
1482 return ret;
1483
1484 return _bfd_mips_elf_gprel16_with_gp (abfd, symbol, reloc_entry,
1485 input_section, relocatable,
1486 data, gp);
1487 }
1488
1489 /* Do a R_MIPS_GPREL32 relocation. This is a 32 bit value which must
1490 become the offset from the gp register. */
1491
1492 static bfd_reloc_status_type
1493 mips_elf_gprel32_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1494 void *data, asection *input_section, bfd *output_bfd,
1495 char **error_message)
1496 {
1497 bfd_boolean relocatable;
1498 bfd_reloc_status_type ret;
1499 bfd_vma gp;
1500
1501 /* R_MIPS_GPREL32 relocations are defined for local symbols only. */
1502 if (output_bfd != NULL
1503 && (symbol->flags & BSF_SECTION_SYM) == 0
1504 && (symbol->flags & BSF_LOCAL) != 0)
1505 {
1506 *error_message = (char *)
1507 _("32bits gp relative relocation occurs for an external symbol");
1508 return bfd_reloc_outofrange;
1509 }
1510
1511 if (output_bfd != NULL)
1512 {
1513 relocatable = TRUE;
1514 gp = _bfd_get_gp_value (output_bfd);
1515 }
1516 else
1517 {
1518 relocatable = FALSE;
1519 output_bfd = symbol->section->output_section->owner;
1520
1521 ret = mips_elf_final_gp (output_bfd, symbol, relocatable,
1522 error_message, &gp);
1523 if (ret != bfd_reloc_ok)
1524 return ret;
1525 }
1526
1527 return gprel32_with_gp (abfd, symbol, reloc_entry, input_section,
1528 relocatable, data, gp);
1529 }
1530
1531 static bfd_reloc_status_type
1532 gprel32_with_gp (bfd *abfd, asymbol *symbol, arelent *reloc_entry,
1533 asection *input_section, bfd_boolean relocatable,
1534 void *data, bfd_vma gp)
1535 {
1536 bfd_vma relocation;
1537 unsigned long val;
1538
1539 if (bfd_is_com_section (symbol->section))
1540 relocation = 0;
1541 else
1542 relocation = symbol->value;
1543
1544 relocation += symbol->section->output_section->vma;
1545 relocation += symbol->section->output_offset;
1546
1547 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
1548 return bfd_reloc_outofrange;
1549
1550 if (reloc_entry->howto->src_mask == 0)
1551 val = 0;
1552 else
1553 val = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
1554
1555 /* Set val to the offset into the section or symbol. */
1556 val += reloc_entry->addend;
1557
1558 /* Adjust val for the final section location and GP value. If we
1559 are producing relocatable output, we don't want to do this for
1560 an external symbol. */
1561 if (! relocatable
1562 || (symbol->flags & BSF_SECTION_SYM) != 0)
1563 val += relocation - gp;
1564
1565 bfd_put_32 (abfd, val, (bfd_byte *) data + reloc_entry->address);
1566
1567 if (relocatable)
1568 reloc_entry->address += input_section->output_offset;
1569
1570 return bfd_reloc_ok;
1571 }
1572
1573 /* Do a R_MIPS_SHIFT6 relocation. The MSB of the shift is stored at bit 2,
1574 the rest is at bits 6-10. The bitpos already got right by the howto. */
1575
1576 static bfd_reloc_status_type
1577 mips_elf_shift6_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1578 void *data, asection *input_section, bfd *output_bfd,
1579 char **error_message)
1580 {
1581 if (reloc_entry->howto->partial_inplace)
1582 {
1583 reloc_entry->addend = ((reloc_entry->addend & 0x00007c0)
1584 | (reloc_entry->addend & 0x00000800) >> 9);
1585 }
1586
1587 return _bfd_mips_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1588 input_section, output_bfd,
1589 error_message);
1590 }
1591 \f
1592 /* Handle a mips16 jump. */
1593
1594 static bfd_reloc_status_type
1595 mips16_jump_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1596 arelent *reloc_entry ATTRIBUTE_UNUSED,
1597 asymbol *symbol ATTRIBUTE_UNUSED,
1598 void *data ATTRIBUTE_UNUSED,
1599 asection *input_section, bfd *output_bfd ATTRIBUTE_UNUSED,
1600 char **error_message ATTRIBUTE_UNUSED)
1601 {
1602 static bfd_boolean warned = FALSE;
1603
1604 /* FIXME. */
1605 if (! warned)
1606 (*_bfd_error_handler)
1607 (_("Linking mips16 objects into %s format is not supported"),
1608 bfd_get_target (input_section->output_section->owner));
1609 warned = TRUE;
1610
1611 return bfd_reloc_undefined;
1612 }
1613
1614 /* Handle a mips16 GP relative reloc. */
1615
1616 static bfd_reloc_status_type
1617 mips16_gprel_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1618 void *data, asection *input_section, bfd *output_bfd,
1619 char **error_message)
1620 {
1621 bfd_boolean relocatable;
1622 bfd_reloc_status_type ret;
1623 bfd_byte *location;
1624 bfd_vma gp;
1625
1626 /* If we're relocating, and this is an external symbol, we don't want
1627 to change anything. */
1628 if (output_bfd != NULL
1629 && (symbol->flags & BSF_SECTION_SYM) == 0
1630 && (symbol->flags & BSF_LOCAL) != 0)
1631 {
1632 reloc_entry->address += input_section->output_offset;
1633 return bfd_reloc_ok;
1634 }
1635
1636 if (output_bfd != NULL)
1637 relocatable = TRUE;
1638 else
1639 {
1640 relocatable = FALSE;
1641 output_bfd = symbol->section->output_section->owner;
1642 }
1643
1644 ret = mips_elf_final_gp (output_bfd, symbol, relocatable, error_message,
1645 &gp);
1646 if (ret != bfd_reloc_ok)
1647 return ret;
1648
1649 location = (bfd_byte *) data + reloc_entry->address;
1650 _bfd_mips16_elf_reloc_unshuffle (abfd, reloc_entry->howto->type, FALSE,
1651 location);
1652 ret = _bfd_mips_elf_gprel16_with_gp (abfd, symbol, reloc_entry,
1653 input_section, relocatable,
1654 data, gp);
1655 _bfd_mips16_elf_reloc_shuffle (abfd, reloc_entry->howto->type, !relocatable,
1656 location);
1657
1658 return ret;
1659 }
1660 \f
1661 /* A mapping from BFD reloc types to MIPS ELF reloc types. */
1662
1663 struct elf_reloc_map {
1664 bfd_reloc_code_real_type bfd_val;
1665 enum elf_mips_reloc_type elf_val;
1666 };
1667
1668 static const struct elf_reloc_map mips_reloc_map[] =
1669 {
1670 { BFD_RELOC_NONE, R_MIPS_NONE },
1671 { BFD_RELOC_16, R_MIPS_16 },
1672 { BFD_RELOC_32, R_MIPS_32 },
1673 /* There is no BFD reloc for R_MIPS_REL32. */
1674 { BFD_RELOC_CTOR, R_MIPS_32 },
1675 { BFD_RELOC_64, R_MIPS_64 },
1676 { BFD_RELOC_16_PCREL, R_MIPS_PC16 },
1677 { BFD_RELOC_HI16_S, R_MIPS_HI16 },
1678 { BFD_RELOC_LO16, R_MIPS_LO16 },
1679 { BFD_RELOC_GPREL16, R_MIPS_GPREL16 },
1680 { BFD_RELOC_GPREL32, R_MIPS_GPREL32 },
1681 { BFD_RELOC_MIPS_JMP, R_MIPS_26 },
1682 { BFD_RELOC_MIPS_LITERAL, R_MIPS_LITERAL },
1683 { BFD_RELOC_MIPS_GOT16, R_MIPS_GOT16 },
1684 { BFD_RELOC_MIPS_CALL16, R_MIPS_CALL16 },
1685 { BFD_RELOC_MIPS_SHIFT5, R_MIPS_SHIFT5 },
1686 { BFD_RELOC_MIPS_SHIFT6, R_MIPS_SHIFT6 },
1687 { BFD_RELOC_MIPS_GOT_DISP, R_MIPS_GOT_DISP },
1688 { BFD_RELOC_MIPS_GOT_PAGE, R_MIPS_GOT_PAGE },
1689 { BFD_RELOC_MIPS_GOT_OFST, R_MIPS_GOT_OFST },
1690 { BFD_RELOC_MIPS_GOT_HI16, R_MIPS_GOT_HI16 },
1691 { BFD_RELOC_MIPS_GOT_LO16, R_MIPS_GOT_LO16 },
1692 { BFD_RELOC_MIPS_SUB, R_MIPS_SUB },
1693 { BFD_RELOC_MIPS_INSERT_A, R_MIPS_INSERT_A },
1694 { BFD_RELOC_MIPS_INSERT_B, R_MIPS_INSERT_B },
1695 { BFD_RELOC_MIPS_DELETE, R_MIPS_DELETE },
1696 { BFD_RELOC_MIPS_HIGHEST, R_MIPS_HIGHEST },
1697 { BFD_RELOC_MIPS_HIGHER, R_MIPS_HIGHER },
1698 { BFD_RELOC_MIPS_CALL_HI16, R_MIPS_CALL_HI16 },
1699 { BFD_RELOC_MIPS_CALL_LO16, R_MIPS_CALL_LO16 },
1700 { BFD_RELOC_MIPS_SCN_DISP, R_MIPS_SCN_DISP },
1701 { BFD_RELOC_MIPS_REL16, R_MIPS_REL16 },
1702 /* Use of R_MIPS_ADD_IMMEDIATE and R_MIPS_PJUMP is deprecated. */
1703 { BFD_RELOC_MIPS_RELGOT, R_MIPS_RELGOT },
1704 { BFD_RELOC_MIPS_JALR, R_MIPS_JALR }
1705 };
1706
1707 static const struct elf_reloc_map mips16_reloc_map[] =
1708 {
1709 { BFD_RELOC_MIPS16_JMP, R_MIPS16_26 - R_MIPS16_min },
1710 { BFD_RELOC_MIPS16_GPREL, R_MIPS16_GPREL - R_MIPS16_min },
1711 { BFD_RELOC_MIPS16_HI16_S, R_MIPS16_HI16 - R_MIPS16_min },
1712 { BFD_RELOC_MIPS16_LO16, R_MIPS16_LO16 - R_MIPS16_min },
1713 };
1714
1715 /* Given a BFD reloc type, return a howto structure. */
1716
1717 static reloc_howto_type *
1718 bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1719 bfd_reloc_code_real_type code)
1720 {
1721 unsigned int i;
1722 /* FIXME: We default to RELA here instead of choosing the right
1723 relocation variant. */
1724 reloc_howto_type *howto_table = elf_mips_howto_table_rela;
1725 reloc_howto_type *howto16_table = elf_mips16_howto_table_rela;
1726
1727 for (i = 0; i < sizeof (mips_reloc_map) / sizeof (struct elf_reloc_map);
1728 i++)
1729 {
1730 if (mips_reloc_map[i].bfd_val == code)
1731 return &howto_table[(int) mips_reloc_map[i].elf_val];
1732 }
1733
1734 for (i = 0; i < sizeof (mips16_reloc_map) / sizeof (struct elf_reloc_map);
1735 i++)
1736 {
1737 if (mips16_reloc_map[i].bfd_val == code)
1738 return &howto16_table[(int) mips16_reloc_map[i].elf_val];
1739 }
1740
1741 switch (code)
1742 {
1743 case BFD_RELOC_VTABLE_INHERIT:
1744 return &elf_mips_gnu_vtinherit_howto;
1745 case BFD_RELOC_VTABLE_ENTRY:
1746 return &elf_mips_gnu_vtentry_howto;
1747 case BFD_RELOC_16_PCREL_S2:
1748 return &elf_mips_gnu_rela16_s2;
1749 default:
1750 bfd_set_error (bfd_error_bad_value);
1751 return NULL;
1752 }
1753 }
1754
1755 /* Given a MIPS Elf_Internal_Rel, fill in an arelent structure. */
1756
1757 static reloc_howto_type *
1758 mips_elf_n32_rtype_to_howto (unsigned int r_type, bfd_boolean rela_p)
1759 {
1760 switch (r_type)
1761 {
1762 case R_MIPS_GNU_VTINHERIT:
1763 return &elf_mips_gnu_vtinherit_howto;
1764 case R_MIPS_GNU_VTENTRY:
1765 return &elf_mips_gnu_vtentry_howto;
1766 case R_MIPS_GNU_REL16_S2:
1767 if (rela_p)
1768 return &elf_mips_gnu_rela16_s2;
1769 else
1770 return &elf_mips_gnu_rel16_s2;
1771 default:
1772 if (r_type >= R_MIPS16_min && r_type < R_MIPS16_max)
1773 {
1774 if (rela_p)
1775 return &elf_mips16_howto_table_rela[r_type - R_MIPS16_min];
1776 else
1777 return &elf_mips16_howto_table_rel[r_type - R_MIPS16_min];
1778 }
1779 BFD_ASSERT (r_type < (unsigned int) R_MIPS_max);
1780 if (rela_p)
1781 return &elf_mips_howto_table_rela[r_type];
1782 else
1783 return &elf_mips_howto_table_rel[r_type];
1784 break;
1785 }
1786 }
1787
1788 /* Given a MIPS Elf_Internal_Rel, fill in an arelent structure. */
1789
1790 static void
1791 mips_info_to_howto_rel (bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst)
1792 {
1793 unsigned int r_type;
1794
1795 r_type = ELF32_R_TYPE (dst->r_info);
1796 cache_ptr->howto = mips_elf_n32_rtype_to_howto (r_type, FALSE);
1797
1798 /* The addend for a GPREL16 or LITERAL relocation comes from the GP
1799 value for the object file. We get the addend now, rather than
1800 when we do the relocation, because the symbol manipulations done
1801 by the linker may cause us to lose track of the input BFD. */
1802 if (((*cache_ptr->sym_ptr_ptr)->flags & BSF_SECTION_SYM) != 0
1803 && (r_type == (unsigned int) R_MIPS_GPREL16
1804 || r_type == (unsigned int) R_MIPS_LITERAL))
1805 cache_ptr->addend = elf_gp (abfd);
1806 }
1807
1808 /* Given a MIPS Elf_Internal_Rela, fill in an arelent structure. */
1809
1810 static void
1811 mips_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED,
1812 arelent *cache_ptr, Elf_Internal_Rela *dst)
1813 {
1814 unsigned int r_type;
1815
1816 r_type = ELF32_R_TYPE (dst->r_info);
1817 cache_ptr->howto = mips_elf_n32_rtype_to_howto (r_type, TRUE);
1818 cache_ptr->addend = dst->r_addend;
1819 }
1820 \f
1821 /* Determine whether a symbol is global for the purposes of splitting
1822 the symbol table into global symbols and local symbols. At least
1823 on Irix 5, this split must be between section symbols and all other
1824 symbols. On most ELF targets the split is between static symbols
1825 and externally visible symbols. */
1826
1827 static bfd_boolean
1828 mips_elf_sym_is_global (bfd *abfd ATTRIBUTE_UNUSED, asymbol *sym)
1829 {
1830 if (SGI_COMPAT (abfd))
1831 return (sym->flags & BSF_SECTION_SYM) == 0;
1832 else
1833 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
1834 || bfd_is_und_section (bfd_get_section (sym))
1835 || bfd_is_com_section (bfd_get_section (sym)));
1836 }
1837 \f
1838 /* Set the right machine number for a MIPS ELF file. */
1839
1840 static bfd_boolean
1841 mips_elf_n32_object_p (bfd *abfd)
1842 {
1843 unsigned long mach;
1844
1845 /* Irix 5 and 6 are broken. Object file symbol tables are not always
1846 sorted correctly such that local symbols precede global symbols,
1847 and the sh_info field in the symbol table is not always right. */
1848 if (SGI_COMPAT (abfd))
1849 elf_bad_symtab (abfd) = TRUE;
1850
1851 mach = _bfd_elf_mips_mach (elf_elfheader (abfd)->e_flags);
1852 bfd_default_set_arch_mach (abfd, bfd_arch_mips, mach);
1853
1854 if (! ABI_N32_P(abfd))
1855 return FALSE;
1856
1857 return TRUE;
1858 }
1859 \f
1860 /* Support for core dump NOTE sections. */
1861 static bfd_boolean
1862 elf32_mips_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1863 {
1864 int offset;
1865 unsigned int size;
1866
1867 switch (note->descsz)
1868 {
1869 default:
1870 return FALSE;
1871
1872 case 440: /* Linux/MIPS N32 */
1873 /* pr_cursig */
1874 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1875
1876 /* pr_pid */
1877 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1878
1879 /* pr_reg */
1880 offset = 72;
1881 size = 360;
1882
1883 break;
1884 }
1885
1886 /* Make a ".reg/999" section. */
1887 return _bfd_elfcore_make_pseudosection (abfd, ".reg", size,
1888 note->descpos + offset);
1889 }
1890
1891 static bfd_boolean
1892 elf32_mips_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1893 {
1894 switch (note->descsz)
1895 {
1896 default:
1897 return FALSE;
1898
1899 case 128: /* Linux/MIPS elf_prpsinfo */
1900 elf_tdata (abfd)->core_program
1901 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1902 elf_tdata (abfd)->core_command
1903 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1904 }
1905
1906 /* Note that for some reason, a spurious space is tacked
1907 onto the end of the args in some (at least one anyway)
1908 implementations, so strip it off if it exists. */
1909
1910 {
1911 char *command = elf_tdata (abfd)->core_command;
1912 int n = strlen (command);
1913
1914 if (0 < n && command[n - 1] == ' ')
1915 command[n - 1] = '\0';
1916 }
1917
1918 return TRUE;
1919 }
1920 \f
1921 /* Depending on the target vector we generate some version of Irix
1922 executables or "normal" MIPS ELF ABI executables. */
1923 static irix_compat_t
1924 elf_n32_mips_irix_compat (bfd *abfd)
1925 {
1926 if ((abfd->xvec == &bfd_elf32_nbigmips_vec)
1927 || (abfd->xvec == &bfd_elf32_nlittlemips_vec))
1928 return ict_irix6;
1929 else
1930 return ict_none;
1931 }
1932 \f
1933 /* ECOFF swapping routines. These are used when dealing with the
1934 .mdebug section, which is in the ECOFF debugging format. */
1935 static const struct ecoff_debug_swap mips_elf32_ecoff_debug_swap = {
1936 /* Symbol table magic number. */
1937 magicSym,
1938 /* Alignment of debugging information. E.g., 4. */
1939 4,
1940 /* Sizes of external symbolic information. */
1941 sizeof (struct hdr_ext),
1942 sizeof (struct dnr_ext),
1943 sizeof (struct pdr_ext),
1944 sizeof (struct sym_ext),
1945 sizeof (struct opt_ext),
1946 sizeof (struct fdr_ext),
1947 sizeof (struct rfd_ext),
1948 sizeof (struct ext_ext),
1949 /* Functions to swap in external symbolic data. */
1950 ecoff_swap_hdr_in,
1951 ecoff_swap_dnr_in,
1952 ecoff_swap_pdr_in,
1953 ecoff_swap_sym_in,
1954 ecoff_swap_opt_in,
1955 ecoff_swap_fdr_in,
1956 ecoff_swap_rfd_in,
1957 ecoff_swap_ext_in,
1958 _bfd_ecoff_swap_tir_in,
1959 _bfd_ecoff_swap_rndx_in,
1960 /* Functions to swap out external symbolic data. */
1961 ecoff_swap_hdr_out,
1962 ecoff_swap_dnr_out,
1963 ecoff_swap_pdr_out,
1964 ecoff_swap_sym_out,
1965 ecoff_swap_opt_out,
1966 ecoff_swap_fdr_out,
1967 ecoff_swap_rfd_out,
1968 ecoff_swap_ext_out,
1969 _bfd_ecoff_swap_tir_out,
1970 _bfd_ecoff_swap_rndx_out,
1971 /* Function to read in symbolic data. */
1972 _bfd_mips_elf_read_ecoff_info
1973 };
1974 \f
1975 #define ELF_ARCH bfd_arch_mips
1976 #define ELF_MACHINE_CODE EM_MIPS
1977
1978 #define elf_backend_collect TRUE
1979 #define elf_backend_type_change_ok TRUE
1980 #define elf_backend_can_gc_sections TRUE
1981 #define elf_info_to_howto mips_info_to_howto_rela
1982 #define elf_info_to_howto_rel mips_info_to_howto_rel
1983 #define elf_backend_sym_is_global mips_elf_sym_is_global
1984 #define elf_backend_object_p mips_elf_n32_object_p
1985 #define elf_backend_symbol_processing _bfd_mips_elf_symbol_processing
1986 #define elf_backend_section_processing _bfd_mips_elf_section_processing
1987 #define elf_backend_section_from_shdr _bfd_mips_elf_section_from_shdr
1988 #define elf_backend_fake_sections _bfd_mips_elf_fake_sections
1989 #define elf_backend_section_from_bfd_section \
1990 _bfd_mips_elf_section_from_bfd_section
1991 #define elf_backend_add_symbol_hook _bfd_mips_elf_add_symbol_hook
1992 #define elf_backend_link_output_symbol_hook \
1993 _bfd_mips_elf_link_output_symbol_hook
1994 #define elf_backend_create_dynamic_sections \
1995 _bfd_mips_elf_create_dynamic_sections
1996 #define elf_backend_check_relocs _bfd_mips_elf_check_relocs
1997 #define elf_backend_adjust_dynamic_symbol \
1998 _bfd_mips_elf_adjust_dynamic_symbol
1999 #define elf_backend_always_size_sections \
2000 _bfd_mips_elf_always_size_sections
2001 #define elf_backend_size_dynamic_sections \
2002 _bfd_mips_elf_size_dynamic_sections
2003 #define elf_backend_relocate_section _bfd_mips_elf_relocate_section
2004 #define elf_backend_finish_dynamic_symbol \
2005 _bfd_mips_elf_finish_dynamic_symbol
2006 #define elf_backend_finish_dynamic_sections \
2007 _bfd_mips_elf_finish_dynamic_sections
2008 #define elf_backend_final_write_processing \
2009 _bfd_mips_elf_final_write_processing
2010 #define elf_backend_additional_program_headers \
2011 _bfd_mips_elf_additional_program_headers
2012 #define elf_backend_modify_segment_map _bfd_mips_elf_modify_segment_map
2013 #define elf_backend_gc_mark_hook _bfd_mips_elf_gc_mark_hook
2014 #define elf_backend_gc_sweep_hook _bfd_mips_elf_gc_sweep_hook
2015 #define elf_backend_copy_indirect_symbol \
2016 _bfd_mips_elf_copy_indirect_symbol
2017 #define elf_backend_hide_symbol _bfd_mips_elf_hide_symbol
2018 #define elf_backend_grok_prstatus elf32_mips_grok_prstatus
2019 #define elf_backend_grok_psinfo elf32_mips_grok_psinfo
2020 #define elf_backend_ecoff_debug_swap &mips_elf32_ecoff_debug_swap
2021
2022 #define elf_backend_got_header_size (4 * MIPS_RESERVED_GOTNO)
2023
2024 /* MIPS n32 ELF can use a mixture of REL and RELA, but some Relocations
2025 work better/work only in RELA, so we default to this. */
2026 #define elf_backend_may_use_rel_p 1
2027 #define elf_backend_may_use_rela_p 1
2028 #define elf_backend_default_use_rela_p 1
2029 #define elf_backend_sign_extend_vma TRUE
2030
2031 #define elf_backend_discard_info _bfd_mips_elf_discard_info
2032 #define elf_backend_ignore_discarded_relocs \
2033 _bfd_mips_elf_ignore_discarded_relocs
2034 #define elf_backend_write_section _bfd_mips_elf_write_section
2035 #define elf_backend_mips_irix_compat elf_n32_mips_irix_compat
2036 #define elf_backend_mips_rtype_to_howto mips_elf_n32_rtype_to_howto
2037 #define bfd_elf32_find_nearest_line _bfd_mips_elf_find_nearest_line
2038 #define bfd_elf32_new_section_hook _bfd_mips_elf_new_section_hook
2039 #define bfd_elf32_set_section_contents _bfd_mips_elf_set_section_contents
2040 #define bfd_elf32_bfd_get_relocated_section_contents \
2041 _bfd_elf_mips_get_relocated_section_contents
2042 #define bfd_elf32_bfd_link_hash_table_create \
2043 _bfd_mips_elf_link_hash_table_create
2044 #define bfd_elf32_bfd_final_link _bfd_mips_elf_final_link
2045 #define bfd_elf32_bfd_merge_private_bfd_data \
2046 _bfd_mips_elf_merge_private_bfd_data
2047 #define bfd_elf32_bfd_set_private_flags _bfd_mips_elf_set_private_flags
2048 #define bfd_elf32_bfd_print_private_bfd_data \
2049 _bfd_mips_elf_print_private_bfd_data
2050 #define bfd_elf32_bfd_relax_section _bfd_mips_relax_section
2051
2052 /* Support for SGI-ish mips targets using n32 ABI. */
2053
2054 #define TARGET_LITTLE_SYM bfd_elf32_nlittlemips_vec
2055 #define TARGET_LITTLE_NAME "elf32-nlittlemips"
2056 #define TARGET_BIG_SYM bfd_elf32_nbigmips_vec
2057 #define TARGET_BIG_NAME "elf32-nbigmips"
2058
2059 /* The SVR4 MIPS ABI says that this should be 0x10000, but Irix 5 uses
2060 a value of 0x1000, and we are compatible.
2061 FIXME: How does this affect NewABI? */
2062 #define ELF_MAXPAGESIZE 0x1000
2063
2064 #include "elf32-target.h"
2065
2066 /* Support for traditional mips targets using n32 ABI. */
2067 #undef TARGET_LITTLE_SYM
2068 #undef TARGET_LITTLE_NAME
2069 #undef TARGET_BIG_SYM
2070 #undef TARGET_BIG_NAME
2071
2072 #undef ELF_MAXPAGESIZE
2073
2074 #define TARGET_LITTLE_SYM bfd_elf32_ntradlittlemips_vec
2075 #define TARGET_LITTLE_NAME "elf32-ntradlittlemips"
2076 #define TARGET_BIG_SYM bfd_elf32_ntradbigmips_vec
2077 #define TARGET_BIG_NAME "elf32-ntradbigmips"
2078
2079 /* The SVR4 MIPS ABI says that this should be 0x10000, and Linux uses
2080 page sizes of up to that limit, so we need to respect it. */
2081 #define ELF_MAXPAGESIZE 0x10000
2082 #define elf32_bed elf32_tradbed
2083
2084 /* Include the target file again for this target. */
2085 #include "elf32-target.h"
GDB Binutils - Deliverables
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