source: branches/libc-0.6/src/binutils/bfd/elfn32-mips.c

Last change on this file was 607, checked in by bird, 22 years ago

Initial revision
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  • Property svn:eol-style set to native
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File size: 69.7 KB
Line 
1/* MIPS-specific support for 32-bit ELF
2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
3 2003 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
12This file is part of BFD, the Binary File Descriptor library.
13
14This program is free software; you can redistribute it and/or modify
15it under the terms of the GNU General Public License as published by
16the Free Software Foundation; either version 2 of the License, or
17(at your option) any later version.
18
19This program is distributed in the hope that it will be useful,
20but WITHOUT ANY WARRANTY; without even the implied warranty of
21MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22GNU General Public License for more details.
23
24You should have received a copy of the GNU General Public License
25along with this program; if not, write to the Free Software
26Foundation, 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
50static bfd_reloc_status_type mips_elf_generic_reloc
51 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
52static bfd_reloc_status_type mips_elf_hi16_reloc
53 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
54static bfd_reloc_status_type mips_elf_lo16_reloc
55 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
56static bfd_reloc_status_type mips_elf_got16_reloc
57 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
58static bfd_boolean mips_elf_assign_gp
59 PARAMS ((bfd *, bfd_vma *));
60static bfd_reloc_status_type mips_elf_final_gp
61 PARAMS ((bfd *, asymbol *, bfd_boolean, char **, bfd_vma *));
62static bfd_reloc_status_type mips_elf_gprel16_reloc
63 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
64static bfd_reloc_status_type mips_elf_literal_reloc
65 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
66static bfd_reloc_status_type mips_elf_gprel32_reloc
67 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
68static bfd_reloc_status_type gprel32_with_gp
69 PARAMS ((bfd *, asymbol *, arelent *, asection *, bfd_boolean, PTR,
70 bfd_vma));
71static bfd_reloc_status_type mips_elf_shift6_reloc
72 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
73static bfd_reloc_status_type mips16_jump_reloc
74 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
75static bfd_reloc_status_type mips16_gprel_reloc
76 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
77static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
78 PARAMS ((bfd *, bfd_reloc_code_real_type));
79static reloc_howto_type *mips_elf_n32_rtype_to_howto
80 PARAMS ((unsigned int, bfd_boolean));
81static void mips_info_to_howto_rel
82 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
83static void mips_info_to_howto_rela
84 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
85static bfd_boolean mips_elf_sym_is_global
86 PARAMS ((bfd *, asymbol *));
87static bfd_boolean mips_elf_n32_object_p
88 PARAMS ((bfd *));
89static bfd_boolean elf32_mips_grok_prstatus
90 PARAMS ((bfd *, Elf_Internal_Note *));
91static bfd_boolean elf32_mips_grok_psinfo
92 PARAMS ((bfd *, Elf_Internal_Note *));
93static irix_compat_t elf_n32_mips_irix_compat
94 PARAMS ((bfd *));
95
96extern const bfd_target bfd_elf32_nbigmips_vec;
97extern const bfd_target bfd_elf32_nlittlemips_vec;
98
99static asection *prev_reloc_section = NULL;
100static bfd_vma prev_reloc_address = -1;
101static bfd_vma prev_reloc_addend = 0;
102
103/* Nonzero if ABFD is using the N32 ABI. */
104#define ABI_N32_P(abfd) \
105 ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI2) != 0)
106
107/* Whether we are trying to be compatible with IRIX at all. */
108#define SGI_COMPAT(abfd) \
109 (elf_n32_mips_irix_compat (abfd) != ict_none)
110
111/* The number of local .got entries we reserve. */
112#define MIPS_RESERVED_GOTNO (2)
113
114/* In case we're on a 32-bit machine, construct a 64-bit "-1" value
115 from smaller values. Start with zero, widen, *then* decrement. */
116#define MINUS_ONE (((bfd_vma)0) - 1)
117
118/* The relocation table used for SHT_REL sections. */
119
120static reloc_howto_type elf_mips_howto_table_rel[] =
121{
122 /* No relocation. */
123 HOWTO (R_MIPS_NONE, /* type */
124 0, /* rightshift */
125 0, /* size (0 = byte, 1 = short, 2 = long) */
126 0, /* bitsize */
127 FALSE, /* pc_relative */
128 0, /* bitpos */
129 complain_overflow_dont, /* complain_on_overflow */
130 mips_elf_generic_reloc, /* special_function */
131 "R_MIPS_NONE", /* name */
132 FALSE, /* partial_inplace */
133 0, /* src_mask */
134 0, /* dst_mask */
135 FALSE), /* pcrel_offset */
136
137 /* 16 bit relocation. */
138 HOWTO (R_MIPS_16, /* type */
139 0, /* rightshift */
140 2, /* size (0 = byte, 1 = short, 2 = long) */
141 16, /* bitsize */
142 FALSE, /* pc_relative */
143 0, /* bitpos */
144 complain_overflow_signed, /* complain_on_overflow */
145 mips_elf_generic_reloc, /* special_function */
146 "R_MIPS_16", /* name */
147 TRUE, /* partial_inplace */
148 0x0000ffff, /* src_mask */
149 0x0000ffff, /* dst_mask */
150 FALSE), /* pcrel_offset */
151
152 /* 32 bit relocation. */
153 HOWTO (R_MIPS_32, /* type */
154 0, /* rightshift */
155 2, /* size (0 = byte, 1 = short, 2 = long) */
156 32, /* bitsize */
157 FALSE, /* pc_relative */
158 0, /* bitpos */
159 complain_overflow_dont, /* complain_on_overflow */
160 mips_elf_generic_reloc, /* special_function */
161 "R_MIPS_32", /* name */
162 TRUE, /* partial_inplace */
163 0xffffffff, /* src_mask */
164 0xffffffff, /* dst_mask */
165 FALSE), /* pcrel_offset */
166
167 /* 32 bit symbol relative relocation. */
168 HOWTO (R_MIPS_REL32, /* type */
169 0, /* rightshift */
170 2, /* size (0 = byte, 1 = short, 2 = long) */
171 32, /* bitsize */
172 FALSE, /* pc_relative */
173 0, /* bitpos */
174 complain_overflow_dont, /* complain_on_overflow */
175 mips_elf_generic_reloc, /* special_function */
176 "R_MIPS_REL32", /* name */
177 TRUE, /* partial_inplace */
178 0xffffffff, /* src_mask */
179 0xffffffff, /* dst_mask */
180 FALSE), /* pcrel_offset */
181
182 /* 26 bit jump address. */
183 HOWTO (R_MIPS_26, /* type */
184 2, /* rightshift */
185 2, /* size (0 = byte, 1 = short, 2 = long) */
186 26, /* bitsize */
187 FALSE, /* pc_relative */
188 0, /* bitpos */
189 complain_overflow_dont, /* complain_on_overflow */
190 /* This needs complex overflow
191 detection, because the upper four
192 bits must match the PC + 4. */
193 mips_elf_generic_reloc, /* special_function */
194 "R_MIPS_26", /* name */
195 TRUE, /* partial_inplace */
196 0x03ffffff, /* src_mask */
197 0x03ffffff, /* dst_mask */
198 FALSE), /* pcrel_offset */
199
200 /* R_MIPS_HI16 and R_MIPS_LO16 are unsupported for NewABI REL.
201 However, the native IRIX6 tools use them, so we try our best. */
202
203 /* High 16 bits of symbol value. */
204 HOWTO (R_MIPS_HI16, /* type */
205 0, /* rightshift */
206 2, /* size (0 = byte, 1 = short, 2 = long) */
207 16, /* bitsize */
208 FALSE, /* pc_relative */
209 0, /* bitpos */
210 complain_overflow_dont, /* complain_on_overflow */
211 mips_elf_hi16_reloc, /* special_function */
212 "R_MIPS_HI16", /* name */
213 TRUE, /* partial_inplace */
214 0x0000ffff, /* src_mask */
215 0x0000ffff, /* dst_mask */
216 FALSE), /* pcrel_offset */
217
218 /* Low 16 bits of symbol value. */
219 HOWTO (R_MIPS_LO16, /* type */
220 0, /* rightshift */
221 2, /* size (0 = byte, 1 = short, 2 = long) */
222 16, /* bitsize */
223 FALSE, /* pc_relative */
224 0, /* bitpos */
225 complain_overflow_dont, /* complain_on_overflow */
226 mips_elf_lo16_reloc, /* special_function */
227 "R_MIPS_LO16", /* name */
228 TRUE, /* partial_inplace */
229 0x0000ffff, /* src_mask */
230 0x0000ffff, /* dst_mask */
231 FALSE), /* pcrel_offset */
232
233 /* GP relative reference. */
234 HOWTO (R_MIPS_GPREL16, /* type */
235 0, /* rightshift */
236 2, /* size (0 = byte, 1 = short, 2 = long) */
237 16, /* bitsize */
238 FALSE, /* pc_relative */
239 0, /* bitpos */
240 complain_overflow_signed, /* complain_on_overflow */
241 mips_elf_gprel16_reloc, /* special_function */
242 "R_MIPS_GPREL16", /* name */
243 TRUE, /* partial_inplace */
244 0x0000ffff, /* src_mask */
245 0x0000ffff, /* dst_mask */
246 FALSE), /* pcrel_offset */
247
248 /* Reference to literal section. */
249 HOWTO (R_MIPS_LITERAL, /* type */
250 0, /* rightshift */
251 2, /* size (0 = byte, 1 = short, 2 = long) */
252 16, /* bitsize */
253 FALSE, /* pc_relative */
254 0, /* bitpos */
255 complain_overflow_signed, /* complain_on_overflow */
256 mips_elf_literal_reloc, /* special_function */
257 "R_MIPS_LITERAL", /* name */
258 TRUE, /* partial_inplace */
259 0x0000ffff, /* src_mask */
260 0x0000ffff, /* dst_mask */
261 FALSE), /* pcrel_offset */
262
263 /* Reference to global offset table. */
264 HOWTO (R_MIPS_GOT16, /* type */
265 0, /* rightshift */
266 2, /* size (0 = byte, 1 = short, 2 = long) */
267 16, /* bitsize */
268 FALSE, /* pc_relative */
269 0, /* bitpos */
270 complain_overflow_signed, /* complain_on_overflow */
271 mips_elf_got16_reloc, /* special_function */
272 "R_MIPS_GOT16", /* name */
273 TRUE, /* partial_inplace */
274 0x0000ffff, /* src_mask */
275 0x0000ffff, /* dst_mask */
276 FALSE), /* pcrel_offset */
277
278 /* 16 bit PC relative reference. */
279 HOWTO (R_MIPS_PC16, /* type */
280 0, /* rightshift */
281 2, /* size (0 = byte, 1 = short, 2 = long) */
282 16, /* bitsize */
283 TRUE, /* pc_relative */
284 0, /* bitpos */
285 complain_overflow_signed, /* complain_on_overflow */
286 mips_elf_generic_reloc, /* special_function */
287 "R_MIPS_PC16", /* name */
288 TRUE, /* partial_inplace */
289 0x0000ffff, /* src_mask */
290 0x0000ffff, /* dst_mask */
291 TRUE), /* pcrel_offset */
292
293 /* 16 bit call through global offset table. */
294 HOWTO (R_MIPS_CALL16, /* type */
295 0, /* rightshift */
296 2, /* size (0 = byte, 1 = short, 2 = long) */
297 16, /* bitsize */
298 FALSE, /* pc_relative */
299 0, /* bitpos */
300 complain_overflow_signed, /* complain_on_overflow */
301 mips_elf_generic_reloc, /* special_function */
302 "R_MIPS_CALL16", /* name */
303 TRUE, /* partial_inplace */
304 0x0000ffff, /* src_mask */
305 0x0000ffff, /* dst_mask */
306 FALSE), /* pcrel_offset */
307
308 /* 32 bit GP relative reference. */
309 HOWTO (R_MIPS_GPREL32, /* type */
310 0, /* rightshift */
311 2, /* size (0 = byte, 1 = short, 2 = long) */
312 32, /* bitsize */
313 FALSE, /* pc_relative */
314 0, /* bitpos */
315 complain_overflow_dont, /* complain_on_overflow */
316 mips_elf_gprel32_reloc, /* special_function */
317 "R_MIPS_GPREL32", /* name */
318 TRUE, /* partial_inplace */
319 0xffffffff, /* src_mask */
320 0xffffffff, /* dst_mask */
321 FALSE), /* pcrel_offset */
322
323 /* The remaining relocs are defined on Irix 5, although they are
324 not defined by the ABI. */
325 EMPTY_HOWTO (13),
326 EMPTY_HOWTO (14),
327 EMPTY_HOWTO (15),
328
329 /* A 5 bit shift field. */
330 HOWTO (R_MIPS_SHIFT5, /* type */
331 0, /* rightshift */
332 2, /* size (0 = byte, 1 = short, 2 = long) */
333 5, /* bitsize */
334 FALSE, /* pc_relative */
335 6, /* bitpos */
336 complain_overflow_bitfield, /* complain_on_overflow */
337 mips_elf_generic_reloc, /* special_function */
338 "R_MIPS_SHIFT5", /* name */
339 TRUE, /* partial_inplace */
340 0x000007c0, /* src_mask */
341 0x000007c0, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* A 6 bit shift field. */
345 HOWTO (R_MIPS_SHIFT6, /* type */
346 0, /* rightshift */
347 2, /* size (0 = byte, 1 = short, 2 = long) */
348 6, /* bitsize */
349 FALSE, /* pc_relative */
350 6, /* bitpos */
351 complain_overflow_bitfield, /* complain_on_overflow */
352 mips_elf_shift6_reloc, /* special_function */
353 "R_MIPS_SHIFT6", /* name */
354 TRUE, /* partial_inplace */
355 0x000007c4, /* src_mask */
356 0x000007c4, /* dst_mask */
357 FALSE), /* pcrel_offset */
358
359 /* A 64 bit relocation. */
360 HOWTO (R_MIPS_64, /* type */
361 0, /* rightshift */
362 4, /* size (0 = byte, 1 = short, 2 = long) */
363 64, /* bitsize */
364 FALSE, /* pc_relative */
365 0, /* bitpos */
366 complain_overflow_dont, /* complain_on_overflow */
367 mips_elf_generic_reloc, /* special_function */
368 "R_MIPS_64", /* name */
369 TRUE, /* partial_inplace */
370 MINUS_ONE, /* src_mask */
371 MINUS_ONE, /* dst_mask */
372 FALSE), /* pcrel_offset */
373
374 /* Displacement in the global offset table. */
375 HOWTO (R_MIPS_GOT_DISP, /* type */
376 0, /* rightshift */
377 2, /* size (0 = byte, 1 = short, 2 = long) */
378 16, /* bitsize */
379 FALSE, /* pc_relative */
380 0, /* bitpos */
381 complain_overflow_signed, /* complain_on_overflow */
382 mips_elf_generic_reloc, /* special_function */
383 "R_MIPS_GOT_DISP", /* name */
384 TRUE, /* partial_inplace */
385 0x0000ffff, /* src_mask */
386 0x0000ffff, /* dst_mask */
387 FALSE), /* pcrel_offset */
388
389 /* Displacement to page pointer in the global offset table. */
390 HOWTO (R_MIPS_GOT_PAGE, /* type */
391 0, /* rightshift */
392 2, /* size (0 = byte, 1 = short, 2 = long) */
393 16, /* bitsize */
394 FALSE, /* pc_relative */
395 0, /* bitpos */
396 complain_overflow_signed, /* complain_on_overflow */
397 mips_elf_generic_reloc, /* special_function */
398 "R_MIPS_GOT_PAGE", /* name */
399 TRUE, /* partial_inplace */
400 0x0000ffff, /* src_mask */
401 0x0000ffff, /* dst_mask */
402 FALSE), /* pcrel_offset */
403
404 /* Offset from page pointer in the global offset table. */
405 HOWTO (R_MIPS_GOT_OFST, /* type */
406 0, /* rightshift */
407 2, /* size (0 = byte, 1 = short, 2 = long) */
408 16, /* bitsize */
409 FALSE, /* pc_relative */
410 0, /* bitpos */
411 complain_overflow_signed, /* complain_on_overflow */
412 mips_elf_generic_reloc, /* special_function */
413 "R_MIPS_GOT_OFST", /* name */
414 TRUE, /* partial_inplace */
415 0x0000ffff, /* src_mask */
416 0x0000ffff, /* dst_mask */
417 FALSE), /* pcrel_offset */
418
419 /* High 16 bits of displacement in global offset table. */
420 HOWTO (R_MIPS_GOT_HI16, /* type */
421 0, /* rightshift */
422 2, /* size (0 = byte, 1 = short, 2 = long) */
423 16, /* bitsize */
424 FALSE, /* pc_relative */
425 0, /* bitpos */
426 complain_overflow_dont, /* complain_on_overflow */
427 mips_elf_generic_reloc, /* special_function */
428 "R_MIPS_GOT_HI16", /* name */
429 TRUE, /* partial_inplace */
430 0x0000ffff, /* src_mask */
431 0x0000ffff, /* dst_mask */
432 FALSE), /* pcrel_offset */
433
434 /* Low 16 bits of displacement in global offset table. */
435 HOWTO (R_MIPS_GOT_LO16, /* type */
436 0, /* rightshift */
437 2, /* size (0 = byte, 1 = short, 2 = long) */
438 16, /* bitsize */
439 FALSE, /* pc_relative */
440 0, /* bitpos */
441 complain_overflow_dont, /* complain_on_overflow */
442 mips_elf_generic_reloc, /* special_function */
443 "R_MIPS_GOT_LO16", /* name */
444 TRUE, /* partial_inplace */
445 0x0000ffff, /* src_mask */
446 0x0000ffff, /* dst_mask */
447 FALSE), /* pcrel_offset */
448
449 /* 64 bit subtraction. */
450 HOWTO (R_MIPS_SUB, /* type */
451 0, /* rightshift */
452 4, /* size (0 = byte, 1 = short, 2 = long) */
453 64, /* bitsize */
454 FALSE, /* pc_relative */
455 0, /* bitpos */
456 complain_overflow_dont, /* complain_on_overflow */
457 mips_elf_generic_reloc, /* special_function */
458 "R_MIPS_SUB", /* name */
459 TRUE, /* partial_inplace */
460 MINUS_ONE, /* src_mask */
461 MINUS_ONE, /* dst_mask */
462 FALSE), /* pcrel_offset */
463
464 /* Insert the addend as an instruction. */
465 /* FIXME: Not handled correctly. */
466 HOWTO (R_MIPS_INSERT_A, /* type */
467 0, /* rightshift */
468 2, /* size (0 = byte, 1 = short, 2 = long) */
469 32, /* bitsize */
470 FALSE, /* pc_relative */
471 0, /* bitpos */
472 complain_overflow_dont, /* complain_on_overflow */
473 mips_elf_generic_reloc, /* special_function */
474 "R_MIPS_INSERT_A", /* name */
475 TRUE, /* partial_inplace */
476 0xffffffff, /* src_mask */
477 0xffffffff, /* dst_mask */
478 FALSE), /* pcrel_offset */
479
480 /* Insert the addend as an instruction, and change all relocations
481 to refer to the old instruction at the address. */
482 /* FIXME: Not handled correctly. */
483 HOWTO (R_MIPS_INSERT_B, /* type */
484 0, /* rightshift */
485 2, /* size (0 = byte, 1 = short, 2 = long) */
486 32, /* bitsize */
487 FALSE, /* pc_relative */
488 0, /* bitpos */
489 complain_overflow_dont, /* complain_on_overflow */
490 mips_elf_generic_reloc, /* special_function */
491 "R_MIPS_INSERT_B", /* name */
492 TRUE, /* partial_inplace */
493 0xffffffff, /* src_mask */
494 0xffffffff, /* dst_mask */
495 FALSE), /* pcrel_offset */
496
497 /* Delete a 32 bit instruction. */
498 /* FIXME: Not handled correctly. */
499 HOWTO (R_MIPS_DELETE, /* type */
500 0, /* rightshift */
501 2, /* size (0 = byte, 1 = short, 2 = long) */
502 32, /* bitsize */
503 FALSE, /* pc_relative */
504 0, /* bitpos */
505 complain_overflow_dont, /* complain_on_overflow */
506 mips_elf_generic_reloc, /* special_function */
507 "R_MIPS_DELETE", /* name */
508 TRUE, /* partial_inplace */
509 0xffffffff, /* src_mask */
510 0xffffffff, /* dst_mask */
511 FALSE), /* pcrel_offset */
512
513 /* The MIPS ELF64 ABI Draft wants us to support these for REL relocations.
514 We don't, because
515 a) It means building the addend from a R_MIPS_HIGHEST/R_MIPS_HIGHER/
516 R_MIPS_HI16/R_MIPS_LO16 sequence with varying ordering, using
517 fallable heuristics.
518 b) No other NEwABI toolchain actually emits such relocations. */
519 EMPTY_HOWTO (R_MIPS_HIGHER),
520 EMPTY_HOWTO (R_MIPS_HIGHEST),
521
522 /* High 16 bits of displacement in global offset table. */
523 HOWTO (R_MIPS_CALL_HI16, /* type */
524 0, /* rightshift */
525 2, /* size (0 = byte, 1 = short, 2 = long) */
526 16, /* bitsize */
527 FALSE, /* pc_relative */
528 0, /* bitpos */
529 complain_overflow_dont, /* complain_on_overflow */
530 mips_elf_generic_reloc, /* special_function */
531 "R_MIPS_CALL_HI16", /* name */
532 TRUE, /* partial_inplace */
533 0x0000ffff, /* src_mask */
534 0x0000ffff, /* dst_mask */
535 FALSE), /* pcrel_offset */
536
537 /* Low 16 bits of displacement in global offset table. */
538 HOWTO (R_MIPS_CALL_LO16, /* type */
539 0, /* rightshift */
540 2, /* size (0 = byte, 1 = short, 2 = long) */
541 16, /* bitsize */
542 FALSE, /* pc_relative */
543 0, /* bitpos */
544 complain_overflow_dont, /* complain_on_overflow */
545 mips_elf_generic_reloc, /* special_function */
546 "R_MIPS_CALL_LO16", /* name */
547 TRUE, /* partial_inplace */
548 0x0000ffff, /* src_mask */
549 0x0000ffff, /* dst_mask */
550 FALSE), /* pcrel_offset */
551
552 /* Section displacement. */
553 HOWTO (R_MIPS_SCN_DISP, /* type */
554 0, /* rightshift */
555 2, /* size (0 = byte, 1 = short, 2 = long) */
556 32, /* bitsize */
557 FALSE, /* pc_relative */
558 0, /* bitpos */
559 complain_overflow_dont, /* complain_on_overflow */
560 mips_elf_generic_reloc, /* special_function */
561 "R_MIPS_SCN_DISP", /* name */
562 TRUE, /* partial_inplace */
563 0xffffffff, /* src_mask */
564 0xffffffff, /* dst_mask */
565 FALSE), /* pcrel_offset */
566
567 HOWTO (R_MIPS_REL16, /* type */
568 0, /* rightshift */
569 1, /* size (0 = byte, 1 = short, 2 = long) */
570 16, /* bitsize */
571 FALSE, /* pc_relative */
572 0, /* bitpos */
573 complain_overflow_signed, /* complain_on_overflow */
574 mips_elf_generic_reloc, /* special_function */
575 "R_MIPS_REL16", /* name */
576 TRUE, /* partial_inplace */
577 0xffff, /* src_mask */
578 0xffff, /* dst_mask */
579 FALSE), /* pcrel_offset */
580
581 /* These two are obsolete. */
582 EMPTY_HOWTO (R_MIPS_ADD_IMMEDIATE),
583 EMPTY_HOWTO (R_MIPS_PJUMP),
584
585 /* Similiar to R_MIPS_REL32, but used for relocations in a GOT section.
586 It must be used for multigot GOT's (and only there). */
587 HOWTO (R_MIPS_RELGOT, /* type */
588 0, /* rightshift */
589 2, /* size (0 = byte, 1 = short, 2 = long) */
590 32, /* bitsize */
591 FALSE, /* pc_relative */
592 0, /* bitpos */
593 complain_overflow_dont, /* complain_on_overflow */
594 mips_elf_generic_reloc, /* special_function */
595 "R_MIPS_RELGOT", /* name */
596 TRUE, /* partial_inplace */
597 0xffffffff, /* src_mask */
598 0xffffffff, /* dst_mask */
599 FALSE), /* pcrel_offset */
600
601 /* Protected jump conversion. This is an optimization hint. No
602 relocation is required for correctness. */
603 HOWTO (R_MIPS_JALR, /* type */
604 0, /* rightshift */
605 2, /* size (0 = byte, 1 = short, 2 = long) */
606 32, /* bitsize */
607 FALSE, /* pc_relative */
608 0, /* bitpos */
609 complain_overflow_dont, /* complain_on_overflow */
610 mips_elf_generic_reloc, /* special_function */
611 "R_MIPS_JALR", /* name */
612 FALSE, /* partial_inplace */
613 0x00000000, /* src_mask */
614 0x00000000, /* dst_mask */
615 FALSE), /* pcrel_offset */
616};
617
618/* The relocation table used for SHT_RELA sections. */
619
620static reloc_howto_type elf_mips_howto_table_rela[] =
621{
622 /* No relocation. */
623 HOWTO (R_MIPS_NONE, /* type */
624 0, /* rightshift */
625 0, /* size (0 = byte, 1 = short, 2 = long) */
626 0, /* bitsize */
627 FALSE, /* pc_relative */
628 0, /* bitpos */
629 complain_overflow_dont, /* complain_on_overflow */
630 mips_elf_generic_reloc, /* special_function */
631 "R_MIPS_NONE", /* name */
632 FALSE, /* partial_inplace */
633 0, /* src_mask */
634 0, /* dst_mask */
635 FALSE), /* pcrel_offset */
636
637 /* 16 bit relocation. */
638 HOWTO (R_MIPS_16, /* type */
639 0, /* rightshift */
640 2, /* size (0 = byte, 1 = short, 2 = long) */
641 16, /* bitsize */
642 FALSE, /* pc_relative */
643 0, /* bitpos */
644 complain_overflow_signed, /* complain_on_overflow */
645 mips_elf_generic_reloc, /* special_function */
646 "R_MIPS_16", /* name */
647 FALSE, /* partial_inplace */
648 0, /* src_mask */
649 0x0000, /* dst_mask */
650 FALSE), /* pcrel_offset */
651
652 /* 32 bit relocation. */
653 HOWTO (R_MIPS_32, /* type */
654 0, /* rightshift */
655 2, /* size (0 = byte, 1 = short, 2 = long) */
656 32, /* bitsize */
657 FALSE, /* pc_relative */
658 0, /* bitpos */
659 complain_overflow_dont, /* complain_on_overflow */
660 mips_elf_generic_reloc, /* special_function */
661 "R_MIPS_32", /* name */
662 FALSE, /* partial_inplace */
663 0, /* src_mask */
664 0xffffffff, /* dst_mask */
665 FALSE), /* pcrel_offset */
666
667 /* 32 bit symbol relative relocation. */
668 HOWTO (R_MIPS_REL32, /* type */
669 0, /* rightshift */
670 2, /* size (0 = byte, 1 = short, 2 = long) */
671 32, /* bitsize */
672 FALSE, /* pc_relative */
673 0, /* bitpos */
674 complain_overflow_dont, /* complain_on_overflow */
675 mips_elf_generic_reloc, /* special_function */
676 "R_MIPS_REL32", /* name */
677 FALSE, /* partial_inplace */
678 0, /* src_mask */
679 0xffffffff, /* dst_mask */
680 FALSE), /* pcrel_offset */
681
682 /* 26 bit jump address. */
683 HOWTO (R_MIPS_26, /* type */
684 2, /* rightshift */
685 2, /* size (0 = byte, 1 = short, 2 = long) */
686 26, /* bitsize */
687 FALSE, /* pc_relative */
688 0, /* bitpos */
689 complain_overflow_dont, /* complain_on_overflow */
690 /* This needs complex overflow
691 detection, because the upper 36
692 bits must match the PC + 4. */
693 mips_elf_generic_reloc, /* special_function */
694 "R_MIPS_26", /* name */
695 FALSE, /* partial_inplace */
696 0, /* src_mask */
697 0x03ffffff, /* dst_mask */
698 FALSE), /* pcrel_offset */
699
700 /* High 16 bits of symbol value. */
701 HOWTO (R_MIPS_HI16, /* type */
702 0, /* rightshift */
703 2, /* size (0 = byte, 1 = short, 2 = long) */
704 16, /* bitsize */
705 FALSE, /* pc_relative */
706 0, /* bitpos */
707 complain_overflow_dont, /* complain_on_overflow */
708 mips_elf_generic_reloc, /* special_function */
709 "R_MIPS_HI16", /* name */
710 FALSE, /* partial_inplace */
711 0, /* src_mask */
712 0x0000ffff, /* dst_mask */
713 FALSE), /* pcrel_offset */
714
715 /* Low 16 bits of symbol value. */
716 HOWTO (R_MIPS_LO16, /* type */
717 0, /* rightshift */
718 2, /* size (0 = byte, 1 = short, 2 = long) */
719 16, /* bitsize */
720 FALSE, /* pc_relative */
721 0, /* bitpos */
722 complain_overflow_dont, /* complain_on_overflow */
723 mips_elf_generic_reloc, /* special_function */
724 "R_MIPS_LO16", /* name */
725 FALSE, /* partial_inplace */
726 0, /* src_mask */
727 0x0000ffff, /* dst_mask */
728 FALSE), /* pcrel_offset */
729
730 /* GP relative reference. */
731 HOWTO (R_MIPS_GPREL16, /* type */
732 0, /* rightshift */
733 2, /* size (0 = byte, 1 = short, 2 = long) */
734 16, /* bitsize */
735 FALSE, /* pc_relative */
736 0, /* bitpos */
737 complain_overflow_signed, /* complain_on_overflow */
738 mips_elf_gprel16_reloc, /* special_function */
739 "R_MIPS_GPREL16", /* name */
740 FALSE, /* partial_inplace */
741 0, /* src_mask */
742 0x0000ffff, /* dst_mask */
743 FALSE), /* pcrel_offset */
744
745 /* Reference to literal section. */
746 HOWTO (R_MIPS_LITERAL, /* type */
747 0, /* rightshift */
748 2, /* size (0 = byte, 1 = short, 2 = long) */
749 16, /* bitsize */
750 FALSE, /* pc_relative */
751 0, /* bitpos */
752 complain_overflow_signed, /* complain_on_overflow */
753 mips_elf_literal_reloc, /* special_function */
754 "R_MIPS_LITERAL", /* name */
755 FALSE, /* partial_inplace */
756 0, /* src_mask */
757 0x0000ffff, /* dst_mask */
758 FALSE), /* pcrel_offset */
759
760 /* Reference to global offset table. */
761 HOWTO (R_MIPS_GOT16, /* type */
762 0, /* rightshift */
763 2, /* size (0 = byte, 1 = short, 2 = long) */
764 16, /* bitsize */
765 FALSE, /* pc_relative */
766 0, /* bitpos */
767 complain_overflow_signed, /* complain_on_overflow */
768 mips_elf_got16_reloc, /* special_function */
769 "R_MIPS_GOT16", /* name */
770 FALSE, /* partial_inplace */
771 0, /* src_mask */
772 0x0000ffff, /* dst_mask */
773 FALSE), /* pcrel_offset */
774
775 /* 16 bit PC relative reference. */
776 HOWTO (R_MIPS_PC16, /* type */
777 0, /* rightshift */
778 2, /* size (0 = byte, 1 = short, 2 = long) */
779 16, /* bitsize */
780 TRUE, /* pc_relative */
781 0, /* bitpos */
782 complain_overflow_signed, /* complain_on_overflow */
783 mips_elf_generic_reloc, /* special_function */
784 "R_MIPS_PC16", /* name */
785 FALSE, /* partial_inplace */
786 0, /* src_mask */
787 0x0000ffff, /* dst_mask */
788 TRUE), /* pcrel_offset */
789
790 /* 16 bit call through global offset table. */
791 HOWTO (R_MIPS_CALL16, /* type */
792 0, /* rightshift */
793 2, /* size (0 = byte, 1 = short, 2 = long) */
794 16, /* bitsize */
795 FALSE, /* pc_relative */
796 0, /* bitpos */
797 complain_overflow_signed, /* complain_on_overflow */
798 mips_elf_generic_reloc, /* special_function */
799 "R_MIPS_CALL16", /* name */
800 FALSE, /* partial_inplace */
801 0, /* src_mask */
802 0x0000ffff, /* dst_mask */
803 FALSE), /* pcrel_offset */
804
805 /* 32 bit GP relative reference. */
806 HOWTO (R_MIPS_GPREL32, /* type */
807 0, /* rightshift */
808 2, /* size (0 = byte, 1 = short, 2 = long) */
809 32, /* bitsize */
810 FALSE, /* pc_relative */
811 0, /* bitpos */
812 complain_overflow_dont, /* complain_on_overflow */
813 mips_elf_gprel32_reloc, /* special_function */
814 "R_MIPS_GPREL32", /* name */
815 FALSE, /* partial_inplace */
816 0, /* src_mask */
817 0xffffffff, /* dst_mask */
818 FALSE), /* pcrel_offset */
819
820 EMPTY_HOWTO (13),
821 EMPTY_HOWTO (14),
822 EMPTY_HOWTO (15),
823
824 /* A 5 bit shift field. */
825 HOWTO (R_MIPS_SHIFT5, /* type */
826 0, /* rightshift */
827 2, /* size (0 = byte, 1 = short, 2 = long) */
828 5, /* bitsize */
829 FALSE, /* pc_relative */
830 6, /* bitpos */
831 complain_overflow_bitfield, /* complain_on_overflow */
832 mips_elf_generic_reloc, /* special_function */
833 "R_MIPS_SHIFT5", /* name */
834 FALSE, /* partial_inplace */
835 0, /* src_mask */
836 0x000007c0, /* dst_mask */
837 FALSE), /* pcrel_offset */
838
839 /* A 6 bit shift field. */
840 HOWTO (R_MIPS_SHIFT6, /* type */
841 0, /* rightshift */
842 2, /* size (0 = byte, 1 = short, 2 = long) */
843 6, /* bitsize */
844 FALSE, /* pc_relative */
845 6, /* bitpos */
846 complain_overflow_bitfield, /* complain_on_overflow */
847 mips_elf_shift6_reloc, /* special_function */
848 "R_MIPS_SHIFT6", /* name */
849 FALSE, /* partial_inplace */
850 0, /* src_mask */
851 0x000007c4, /* dst_mask */
852 FALSE), /* pcrel_offset */
853
854 /* 64 bit relocation. */
855 HOWTO (R_MIPS_64, /* type */
856 0, /* rightshift */
857 4, /* size (0 = byte, 1 = short, 2 = long) */
858 64, /* bitsize */
859 FALSE, /* pc_relative */
860 0, /* bitpos */
861 complain_overflow_dont, /* complain_on_overflow */
862 mips_elf_generic_reloc, /* special_function */
863 "R_MIPS_64", /* name */
864 FALSE, /* partial_inplace */
865 0, /* src_mask */
866 MINUS_ONE, /* dst_mask */
867 FALSE), /* pcrel_offset */
868
869 /* Displacement in the global offset table. */
870 HOWTO (R_MIPS_GOT_DISP, /* type */
871 0, /* rightshift */
872 2, /* size (0 = byte, 1 = short, 2 = long) */
873 16, /* bitsize */
874 FALSE, /* pc_relative */
875 0, /* bitpos */
876 complain_overflow_signed, /* complain_on_overflow */
877 mips_elf_generic_reloc, /* special_function */
878 "R_MIPS_GOT_DISP", /* name */
879 FALSE, /* partial_inplace */
880 0, /* src_mask */
881 0x0000ffff, /* dst_mask */
882 FALSE), /* pcrel_offset */
883
884 /* Displacement to page pointer in the global offset table. */
885 HOWTO (R_MIPS_GOT_PAGE, /* type */
886 0, /* rightshift */
887 2, /* size (0 = byte, 1 = short, 2 = long) */
888 16, /* bitsize */
889 FALSE, /* pc_relative */
890 0, /* bitpos */
891 complain_overflow_signed, /* complain_on_overflow */
892 mips_elf_generic_reloc, /* special_function */
893 "R_MIPS_GOT_PAGE", /* name */
894 FALSE, /* partial_inplace */
895 0, /* src_mask */
896 0x0000ffff, /* dst_mask */
897 FALSE), /* pcrel_offset */
898
899 /* Offset from page pointer in the global offset table. */
900 HOWTO (R_MIPS_GOT_OFST, /* type */
901 0, /* rightshift */
902 2, /* size (0 = byte, 1 = short, 2 = long) */
903 16, /* bitsize */
904 FALSE, /* pc_relative */
905 0, /* bitpos */
906 complain_overflow_signed, /* complain_on_overflow */
907 mips_elf_generic_reloc, /* special_function */
908 "R_MIPS_GOT_OFST", /* name */
909 FALSE, /* partial_inplace */
910 0, /* src_mask */
911 0x0000ffff, /* dst_mask */
912 FALSE), /* pcrel_offset */
913
914 /* High 16 bits of displacement in global offset table. */
915 HOWTO (R_MIPS_GOT_HI16, /* type */
916 0, /* rightshift */
917 2, /* size (0 = byte, 1 = short, 2 = long) */
918 16, /* bitsize */
919 FALSE, /* pc_relative */
920 0, /* bitpos */
921 complain_overflow_dont, /* complain_on_overflow */
922 mips_elf_generic_reloc, /* special_function */
923 "R_MIPS_GOT_HI16", /* name */
924 FALSE, /* partial_inplace */
925 0, /* src_mask */
926 0x0000ffff, /* dst_mask */
927 FALSE), /* pcrel_offset */
928
929 /* Low 16 bits of displacement in global offset table. */
930 HOWTO (R_MIPS_GOT_LO16, /* type */
931 0, /* rightshift */
932 2, /* size (0 = byte, 1 = short, 2 = long) */
933 16, /* bitsize */
934 FALSE, /* pc_relative */
935 0, /* bitpos */
936 complain_overflow_dont, /* complain_on_overflow */
937 mips_elf_generic_reloc, /* special_function */
938 "R_MIPS_GOT_LO16", /* name */
939 FALSE, /* partial_inplace */
940 0, /* src_mask */
941 0x0000ffff, /* dst_mask */
942 FALSE), /* pcrel_offset */
943
944 /* 64 bit substraction. */
945 HOWTO (R_MIPS_SUB, /* type */
946 0, /* rightshift */
947 4, /* size (0 = byte, 1 = short, 2 = long) */
948 64, /* bitsize */
949 FALSE, /* pc_relative */
950 0, /* bitpos */
951 complain_overflow_dont, /* complain_on_overflow */
952 mips_elf_generic_reloc, /* special_function */
953 "R_MIPS_SUB", /* name */
954 FALSE, /* partial_inplace */
955 0, /* src_mask */
956 MINUS_ONE, /* dst_mask */
957 FALSE), /* pcrel_offset */
958
959 /* Insert the addend as an instruction. */
960 /* FIXME: Not handled correctly. */
961 HOWTO (R_MIPS_INSERT_A, /* type */
962 0, /* rightshift */
963 2, /* size (0 = byte, 1 = short, 2 = long) */
964 32, /* bitsize */
965 FALSE, /* pc_relative */
966 0, /* bitpos */
967 complain_overflow_dont, /* complain_on_overflow */
968 mips_elf_generic_reloc, /* special_function */
969 "R_MIPS_INSERT_A", /* name */
970 FALSE, /* partial_inplace */
971 0, /* src_mask */
972 0xffffffff, /* dst_mask */
973 FALSE), /* pcrel_offset */
974
975 /* Insert the addend as an instruction, and change all relocations
976 to refer to the old instruction at the address. */
977 /* FIXME: Not handled correctly. */
978 HOWTO (R_MIPS_INSERT_B, /* type */
979 0, /* rightshift */
980 2, /* size (0 = byte, 1 = short, 2 = long) */
981 32, /* bitsize */
982 FALSE, /* pc_relative */
983 0, /* bitpos */
984 complain_overflow_dont, /* complain_on_overflow */
985 mips_elf_generic_reloc, /* special_function */
986 "R_MIPS_INSERT_B", /* name */
987 FALSE, /* partial_inplace */
988 0, /* src_mask */
989 0xffffffff, /* dst_mask */
990 FALSE), /* pcrel_offset */
991
992 /* Delete a 32 bit instruction. */
993 /* FIXME: Not handled correctly. */
994 HOWTO (R_MIPS_DELETE, /* type */
995 0, /* rightshift */
996 2, /* size (0 = byte, 1 = short, 2 = long) */
997 32, /* bitsize */
998 FALSE, /* pc_relative */
999 0, /* bitpos */
1000 complain_overflow_dont, /* complain_on_overflow */
1001 mips_elf_generic_reloc, /* special_function */
1002 "R_MIPS_DELETE", /* name */
1003 FALSE, /* partial_inplace */
1004 0, /* src_mask */
1005 0xffffffff, /* dst_mask */
1006 FALSE), /* pcrel_offset */
1007
1008 /* Get the higher value of a 64 bit addend. */
1009 HOWTO (R_MIPS_HIGHER, /* type */
1010 0, /* rightshift */
1011 2, /* size (0 = byte, 1 = short, 2 = long) */
1012 16, /* bitsize */
1013 FALSE, /* pc_relative */
1014 0, /* bitpos */
1015 complain_overflow_dont, /* complain_on_overflow */
1016 mips_elf_generic_reloc, /* special_function */
1017 "R_MIPS_HIGHER", /* name */
1018 FALSE, /* partial_inplace */
1019 0, /* src_mask */
1020 0x0000ffff, /* dst_mask */
1021 FALSE), /* pcrel_offset */
1022
1023 /* Get the highest value of a 64 bit addend. */
1024 HOWTO (R_MIPS_HIGHEST, /* type */
1025 0, /* rightshift */
1026 2, /* size (0 = byte, 1 = short, 2 = long) */
1027 16, /* bitsize */
1028 FALSE, /* pc_relative */
1029 0, /* bitpos */
1030 complain_overflow_dont, /* complain_on_overflow */
1031 mips_elf_generic_reloc, /* special_function */
1032 "R_MIPS_HIGHEST", /* name */
1033 FALSE, /* partial_inplace */
1034 0, /* src_mask */
1035 0x0000ffff, /* dst_mask */
1036 FALSE), /* pcrel_offset */
1037
1038 /* High 16 bits of displacement in global offset table. */
1039 HOWTO (R_MIPS_CALL_HI16, /* type */
1040 0, /* rightshift */
1041 2, /* size (0 = byte, 1 = short, 2 = long) */
1042 16, /* bitsize */
1043 FALSE, /* pc_relative */
1044 0, /* bitpos */
1045 complain_overflow_dont, /* complain_on_overflow */
1046 mips_elf_generic_reloc, /* special_function */
1047 "R_MIPS_CALL_HI16", /* name */
1048 FALSE, /* partial_inplace */
1049 0, /* src_mask */
1050 0x0000ffff, /* dst_mask */
1051 FALSE), /* pcrel_offset */
1052
1053 /* Low 16 bits of displacement in global offset table. */
1054 HOWTO (R_MIPS_CALL_LO16, /* type */
1055 0, /* rightshift */
1056 2, /* size (0 = byte, 1 = short, 2 = long) */
1057 16, /* bitsize */
1058 FALSE, /* pc_relative */
1059 0, /* bitpos */
1060 complain_overflow_dont, /* complain_on_overflow */
1061 mips_elf_generic_reloc, /* special_function */
1062 "R_MIPS_CALL_LO16", /* name */
1063 FALSE, /* partial_inplace */
1064 0, /* src_mask */
1065 0x0000ffff, /* dst_mask */
1066 FALSE), /* pcrel_offset */
1067
1068 /* Section displacement, used by an associated event location section. */
1069 HOWTO (R_MIPS_SCN_DISP, /* type */
1070 0, /* rightshift */
1071 2, /* size (0 = byte, 1 = short, 2 = long) */
1072 32, /* bitsize */
1073 FALSE, /* pc_relative */
1074 0, /* bitpos */
1075 complain_overflow_dont, /* complain_on_overflow */
1076 mips_elf_generic_reloc, /* special_function */
1077 "R_MIPS_SCN_DISP", /* name */
1078 FALSE, /* partial_inplace */
1079 0, /* src_mask */
1080 0xffffffff, /* dst_mask */
1081 FALSE), /* pcrel_offset */
1082
1083 /* 16 bit relocation. */
1084 HOWTO (R_MIPS_REL16, /* type */
1085 0, /* rightshift */
1086 1, /* size (0 = byte, 1 = short, 2 = long) */
1087 16, /* bitsize */
1088 FALSE, /* pc_relative */
1089 0, /* bitpos */
1090 complain_overflow_signed, /* complain_on_overflow */
1091 mips_elf_generic_reloc, /* special_function */
1092 "R_MIPS_REL16", /* name */
1093 FALSE, /* partial_inplace */
1094 0, /* src_mask */
1095 0xffff, /* dst_mask */
1096 FALSE), /* pcrel_offset */
1097
1098 /* These two are obsolete. */
1099 EMPTY_HOWTO (R_MIPS_ADD_IMMEDIATE),
1100 EMPTY_HOWTO (R_MIPS_PJUMP),
1101
1102 /* Similiar to R_MIPS_REL32, but used for relocations in a GOT section.
1103 It must be used for multigot GOT's (and only there). */
1104 HOWTO (R_MIPS_RELGOT, /* type */
1105 0, /* rightshift */
1106 2, /* size (0 = byte, 1 = short, 2 = long) */
1107 32, /* bitsize */
1108 FALSE, /* pc_relative */
1109 0, /* bitpos */
1110 complain_overflow_dont, /* complain_on_overflow */
1111 mips_elf_generic_reloc, /* special_function */
1112 "R_MIPS_RELGOT", /* name */
1113 FALSE, /* partial_inplace */
1114 0, /* src_mask */
1115 0xffffffff, /* dst_mask */
1116 FALSE), /* pcrel_offset */
1117
1118 /* Protected jump conversion. This is an optimization hint. No
1119 relocation is required for correctness. */
1120 HOWTO (R_MIPS_JALR, /* type */
1121 0, /* rightshift */
1122 2, /* size (0 = byte, 1 = short, 2 = long) */
1123 32, /* bitsize */
1124 FALSE, /* pc_relative */
1125 0, /* bitpos */
1126 complain_overflow_dont, /* complain_on_overflow */
1127 mips_elf_generic_reloc, /* special_function */
1128 "R_MIPS_JALR", /* name */
1129 FALSE, /* partial_inplace */
1130 0, /* src_mask */
1131 0xffffffff, /* dst_mask */
1132 FALSE), /* pcrel_offset */
1133};
1134
1135/* The reloc used for the mips16 jump instruction. */
1136static reloc_howto_type elf_mips16_jump_howto =
1137 HOWTO (R_MIPS16_26, /* type */
1138 2, /* rightshift */
1139 2, /* size (0 = byte, 1 = short, 2 = long) */
1140 26, /* bitsize */
1141 FALSE, /* pc_relative */
1142 0, /* bitpos */
1143 complain_overflow_dont, /* complain_on_overflow */
1144 /* This needs complex overflow
1145 detection, because the upper four
1146 bits must match the PC. */
1147 mips16_jump_reloc, /* special_function */
1148 "R_MIPS16_26", /* name */
1149 TRUE, /* partial_inplace */
1150 0x3ffffff, /* src_mask */
1151 0x3ffffff, /* dst_mask */
1152 FALSE); /* pcrel_offset */
1153
1154/* The reloc used for the mips16 gprel instruction. */
1155static reloc_howto_type elf_mips16_gprel_howto =
1156 HOWTO (R_MIPS16_GPREL, /* type */
1157 0, /* rightshift */
1158 2, /* size (0 = byte, 1 = short, 2 = long) */
1159 16, /* bitsize */
1160 FALSE, /* pc_relative */
1161 0, /* bitpos */
1162 complain_overflow_signed, /* complain_on_overflow */
1163 mips16_gprel_reloc, /* special_function */
1164 "R_MIPS16_GPREL", /* name */
1165 TRUE, /* partial_inplace */
1166 0x07ff001f, /* src_mask */
1167 0x07ff001f, /* dst_mask */
1168 FALSE); /* pcrel_offset */
1169
1170/* GNU extension to record C++ vtable hierarchy */
1171static reloc_howto_type elf_mips_gnu_vtinherit_howto =
1172 HOWTO (R_MIPS_GNU_VTINHERIT, /* type */
1173 0, /* rightshift */
1174 2, /* size (0 = byte, 1 = short, 2 = long) */
1175 0, /* bitsize */
1176 FALSE, /* pc_relative */
1177 0, /* bitpos */
1178 complain_overflow_dont, /* complain_on_overflow */
1179 NULL, /* special_function */
1180 "R_MIPS_GNU_VTINHERIT", /* name */
1181 FALSE, /* partial_inplace */
1182 0, /* src_mask */
1183 0, /* dst_mask */
1184 FALSE); /* pcrel_offset */
1185
1186/* GNU extension to record C++ vtable member usage */
1187static reloc_howto_type elf_mips_gnu_vtentry_howto =
1188 HOWTO (R_MIPS_GNU_VTENTRY, /* type */
1189 0, /* rightshift */
1190 2, /* size (0 = byte, 1 = short, 2 = long) */
1191 0, /* bitsize */
1192 FALSE, /* pc_relative */
1193 0, /* bitpos */
1194 complain_overflow_dont, /* complain_on_overflow */
1195 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
1196 "R_MIPS_GNU_VTENTRY", /* name */
1197 FALSE, /* partial_inplace */
1198 0, /* src_mask */
1199 0, /* dst_mask */
1200 FALSE); /* pcrel_offset */
1201
1202
1203/* This is derived from bfd_elf_generic_reloc. NewABI allows us to have
1204 several relocations against the same address. The addend is derived
1205 from the addends of preceding relocations. If we don't need to
1206 do something special, we simply keep track of the addend. */
1207
1208#define GET_RELOC_ADDEND(obfd, sym, entry, sec) \
1209{ \
1210 /* If we're relocating, and this is an external symbol, we don't \
1211 want to change anything. */ \
1212 if ((obfd) != (bfd *) NULL \
1213 && ((sym)->flags & BSF_SECTION_SYM) == 0 \
1214 && (! (entry)->howto->partial_inplace \
1215 || (entry)->addend == 0)) \
1216 { \
1217 (entry)->address += (sec)->output_offset; \
1218 return bfd_reloc_ok; \
1219 } \
1220 \
1221 /* The addend of combined relocs is remembered and left for \
1222 subsequent relocs. */ \
1223 if (prev_reloc_address != (entry)->address \
1224 || prev_reloc_section != (sec)) \
1225 { \
1226 prev_reloc_section = (sec); \
1227 prev_reloc_address = (entry)->address; \
1228 prev_reloc_addend = (entry)->addend; \
1229 } \
1230 else \
1231 (entry)->addend = prev_reloc_addend; \
1232}
1233
1234#define SET_RELOC_ADDEND(entry) \
1235{ \
1236 prev_reloc_addend = (entry)->addend; \
1237}
1238
1239static bfd_reloc_status_type
1240mips_elf_generic_reloc (abfd, reloc_entry, symbol, data, input_section,
1241 output_bfd, error_message)
1242 bfd *abfd ATTRIBUTE_UNUSED;
1243 arelent *reloc_entry;
1244 asymbol *symbol;
1245 PTR data ATTRIBUTE_UNUSED;
1246 asection *input_section;
1247 bfd *output_bfd;
1248 char **error_message ATTRIBUTE_UNUSED;
1249{
1250 GET_RELOC_ADDEND (output_bfd, symbol, reloc_entry, input_section)
1251
1252 return bfd_reloc_continue;
1253}
1254
1255
1256/* Do a R_MIPS_HI16 relocation. This has to be done in combination
1257 with a R_MIPS_LO16 reloc, because there is a carry from the LO16 to
1258 the HI16. Here we just save the information we need; we do the
1259 actual relocation when we see the LO16.
1260
1261 MIPS ELF requires that the LO16 immediately follow the HI16. As a
1262 GNU extension, for non-pc-relative relocations, we permit an
1263 arbitrary number of HI16 relocs to be associated with a single LO16
1264 reloc. This extension permits gcc to output the HI and LO relocs
1265 itself.
1266
1267 This cannot be done for PC-relative relocations because both the HI16
1268 and LO16 parts of the relocations must be done relative to the LO16
1269 part, and there can be carry to or borrow from the HI16 part. */
1270
1271struct mips_hi16
1272{
1273 struct mips_hi16 *next;
1274 bfd_byte *addr;
1275 bfd_vma addend;
1276};
1277
1278/* FIXME: This should not be a static variable. */
1279
1280static struct mips_hi16 *mips_hi16_list;
1281
1282static bfd_reloc_status_type
1283mips_elf_hi16_reloc (abfd, reloc_entry, symbol, data, input_section,
1284 output_bfd, error_message)
1285 bfd *abfd ATTRIBUTE_UNUSED;
1286 arelent *reloc_entry;
1287 asymbol *symbol;
1288 PTR data;
1289 asection *input_section;
1290 bfd *output_bfd;
1291 char **error_message ATTRIBUTE_UNUSED;
1292{
1293 bfd_reloc_status_type ret;
1294 bfd_vma relocation;
1295 struct mips_hi16 *n;
1296
1297 GET_RELOC_ADDEND (output_bfd, symbol, reloc_entry, input_section)
1298
1299 ret = bfd_reloc_ok;
1300
1301 if (bfd_is_und_section (symbol->section) && output_bfd == (bfd *) NULL)
1302 ret = bfd_reloc_undefined;
1303
1304 if (bfd_is_com_section (symbol->section))
1305 relocation = 0;
1306 else
1307 relocation = symbol->value;
1308
1309 relocation += symbol->section->output_section->vma;
1310 relocation += symbol->section->output_offset;
1311 relocation += reloc_entry->addend;
1312
1313 if (reloc_entry->address > input_section->_cooked_size)
1314 return bfd_reloc_outofrange;
1315
1316 /* Save the information, and let LO16 do the actual relocation. */
1317 n = (struct mips_hi16 *) bfd_malloc ((bfd_size_type) sizeof *n);
1318 if (n == NULL)
1319 return bfd_reloc_outofrange;
1320 n->addr = (bfd_byte *) data + reloc_entry->address;
1321 n->addend = relocation;
1322 n->next = mips_hi16_list;
1323 mips_hi16_list = n;
1324
1325 if (output_bfd != (bfd *) NULL)
1326 reloc_entry->address += input_section->output_offset;
1327
1328 return ret;
1329}
1330
1331/* Do a R_MIPS_LO16 relocation. This is a straightforward 16 bit
1332 inplace relocation; this function exists in order to do the
1333 R_MIPS_HI16 relocation described above. */
1334
1335static bfd_reloc_status_type
1336mips_elf_lo16_reloc (abfd, reloc_entry, symbol, data, input_section,
1337 output_bfd, error_message)
1338 bfd *abfd;
1339 arelent *reloc_entry;
1340 asymbol *symbol;
1341 PTR data;
1342 asection *input_section;
1343 bfd *output_bfd;
1344 char **error_message;
1345{
1346 if (mips_hi16_list != NULL)
1347 {
1348 struct mips_hi16 *l;
1349
1350 l = mips_hi16_list;
1351 while (l != NULL)
1352 {
1353 unsigned long insn;
1354 unsigned long val;
1355 unsigned long vallo;
1356 struct mips_hi16 *next;
1357
1358 /* Do the HI16 relocation. Note that we actually don't need
1359 to know anything about the LO16 itself, except where to
1360 find the low 16 bits of the addend needed by the LO16. */
1361 insn = bfd_get_32 (abfd, l->addr);
1362 vallo = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
1363
1364 /* The low order 16 bits are always treated as a signed
1365 value. */
1366 vallo = ((vallo & 0xffff) ^ 0x8000) - 0x8000;
1367 val = ((insn & 0xffff) << 16) + vallo;
1368 val += l->addend;
1369
1370 /* If PC-relative, we need to subtract out the address of the LO
1371 half of the HI/LO. (The actual relocation is relative
1372 to that instruction.) */
1373 if (reloc_entry->howto->pc_relative)
1374 val -= reloc_entry->address;
1375
1376 /* At this point, "val" has the value of the combined HI/LO
1377 pair. If the low order 16 bits (which will be used for
1378 the LO16 insn) are negative, then we will need an
1379 adjustment for the high order 16 bits. */
1380 val += 0x8000;
1381 val = (val >> 16) & 0xffff;
1382
1383 insn &= ~ (bfd_vma) 0xffff;
1384 insn |= val;
1385 bfd_put_32 (abfd, (bfd_vma) insn, l->addr);
1386
1387 next = l->next;
1388 free (l);
1389 l = next;
1390 }
1391
1392 mips_hi16_list = NULL;
1393 }
1394
1395 /* Now do the LO16 reloc in the usual way. */
1396 return mips_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1397 input_section, output_bfd, error_message);
1398}
1399
1400/* Do a R_MIPS_GOT16 reloc. This is a reloc against the global offset
1401 table used for PIC code. If the symbol is an external symbol, the
1402 instruction is modified to contain the offset of the appropriate
1403 entry in the global offset table. If the symbol is a section
1404 symbol, the next reloc is a R_MIPS_LO16 reloc. The two 16 bit
1405 addends are combined to form the real addend against the section
1406 symbol; the GOT16 is modified to contain the offset of an entry in
1407 the global offset table, and the LO16 is modified to offset it
1408 appropriately. Thus an offset larger than 16 bits requires a
1409 modified value in the global offset table.
1410
1411 This implementation suffices for the assembler, but the linker does
1412 not yet know how to create global offset tables. */
1413
1414static bfd_reloc_status_type
1415mips_elf_got16_reloc (abfd, reloc_entry, symbol, data, input_section,
1416 output_bfd, error_message)
1417 bfd *abfd;
1418 arelent *reloc_entry;
1419 asymbol *symbol;
1420 PTR data;
1421 asection *input_section;
1422 bfd *output_bfd;
1423 char **error_message;
1424{
1425 /* If we're relocating, and this is a local symbol, we can handle it
1426 just like HI16. */
1427 if (output_bfd != (bfd *) NULL
1428 && (symbol->flags & BSF_SECTION_SYM) != 0)
1429 return mips_elf_hi16_reloc (abfd, reloc_entry, symbol, data,
1430 input_section, output_bfd, error_message);
1431
1432 /* Otherwise we try to handle it as R_MIPS_GOT_DISP. */
1433 return mips_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1434 input_section, output_bfd, error_message);
1435}
1436
1437/* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a
1438 dangerous relocation. */
1439
1440static bfd_boolean
1441mips_elf_assign_gp (output_bfd, pgp)
1442 bfd *output_bfd;
1443 bfd_vma *pgp;
1444{
1445 unsigned int count;
1446 asymbol **sym;
1447 unsigned int i;
1448
1449 /* If we've already figured out what GP will be, just return it. */
1450 *pgp = _bfd_get_gp_value (output_bfd);
1451 if (*pgp)
1452 return TRUE;
1453
1454 count = bfd_get_symcount (output_bfd);
1455 sym = bfd_get_outsymbols (output_bfd);
1456
1457 /* The linker script will have created a symbol named `_gp' with the
1458 appropriate value. */
1459 if (sym == (asymbol **) NULL)
1460 i = count;
1461 else
1462 {
1463 for (i = 0; i < count; i++, sym++)
1464 {
1465 register const char *name;
1466
1467 name = bfd_asymbol_name (*sym);
1468 if (*name == '_' && strcmp (name, "_gp") == 0)
1469 {
1470 *pgp = bfd_asymbol_value (*sym);
1471 _bfd_set_gp_value (output_bfd, *pgp);
1472 break;
1473 }
1474 }
1475 }
1476
1477 if (i >= count)
1478 {
1479 /* Only get the error once. */
1480 *pgp = 4;
1481 _bfd_set_gp_value (output_bfd, *pgp);
1482 return FALSE;
1483 }
1484
1485 return TRUE;
1486}
1487
1488/* We have to figure out the gp value, so that we can adjust the
1489 symbol value correctly. We look up the symbol _gp in the output
1490 BFD. If we can't find it, we're stuck. We cache it in the ELF
1491 target data. We don't need to adjust the symbol value for an
1492 external symbol if we are producing relocateable output. */
1493
1494static bfd_reloc_status_type
1495mips_elf_final_gp (output_bfd, symbol, relocateable, error_message, pgp)
1496 bfd *output_bfd;
1497 asymbol *symbol;
1498 bfd_boolean relocateable;
1499 char **error_message;
1500 bfd_vma *pgp;
1501{
1502 if (bfd_is_und_section (symbol->section)
1503 && ! relocateable)
1504 {
1505 *pgp = 0;
1506 return bfd_reloc_undefined;
1507 }
1508
1509 *pgp = _bfd_get_gp_value (output_bfd);
1510 if (*pgp == 0
1511 && (! relocateable
1512 || (symbol->flags & BSF_SECTION_SYM) != 0))
1513 {
1514 if (relocateable)
1515 {
1516 /* Make up a value. */
1517 *pgp = symbol->section->output_section->vma /*+ 0x4000*/;
1518 _bfd_set_gp_value (output_bfd, *pgp);
1519 }
1520 else if (!mips_elf_assign_gp (output_bfd, pgp))
1521 {
1522 *error_message =
1523 (char *) _("GP relative relocation when _gp not defined");
1524 return bfd_reloc_dangerous;
1525 }
1526 }
1527
1528 return bfd_reloc_ok;
1529}
1530
1531/* Do a R_MIPS_GPREL16 relocation. This is a 16 bit value which must
1532 become the offset from the gp register. */
1533
1534static bfd_reloc_status_type
1535mips_elf_gprel16_reloc (abfd, reloc_entry, symbol, data, input_section,
1536 output_bfd, error_message)
1537 bfd *abfd ATTRIBUTE_UNUSED;
1538 arelent *reloc_entry;
1539 asymbol *symbol;
1540 PTR data ATTRIBUTE_UNUSED;
1541 asection *input_section;
1542 bfd *output_bfd;
1543 char **error_message ATTRIBUTE_UNUSED;
1544{
1545 bfd_boolean relocateable;
1546 bfd_reloc_status_type ret;
1547 bfd_vma gp;
1548
1549 GET_RELOC_ADDEND (output_bfd, symbol, reloc_entry, input_section)
1550
1551 if (output_bfd != (bfd *) NULL)
1552 relocateable = TRUE;
1553 else
1554 {
1555 relocateable = FALSE;
1556 output_bfd = symbol->section->output_section->owner;
1557 }
1558
1559 ret = mips_elf_final_gp (output_bfd, symbol, relocateable, error_message,
1560 &gp);
1561 if (ret != bfd_reloc_ok)
1562 return ret;
1563
1564 return _bfd_mips_elf_gprel16_with_gp (abfd, symbol, reloc_entry,
1565 input_section, relocateable,
1566 data, gp);
1567}
1568
1569/* Do a R_MIPS_LITERAL relocation. */
1570
1571static bfd_reloc_status_type
1572mips_elf_literal_reloc (abfd, reloc_entry, symbol, data, input_section,
1573 output_bfd, error_message)
1574 bfd *abfd;
1575 arelent *reloc_entry;
1576 asymbol *symbol;
1577 PTR data;
1578 asection *input_section;
1579 bfd *output_bfd;
1580 char **error_message;
1581{
1582 bfd_boolean relocateable;
1583 bfd_reloc_status_type ret;
1584 bfd_vma gp;
1585
1586 GET_RELOC_ADDEND (output_bfd, symbol, reloc_entry, input_section)
1587
1588 /* FIXME: The entries in the .lit8 and .lit4 sections should be merged. */
1589 if (output_bfd != (bfd *) NULL)
1590 relocateable = TRUE;
1591 else
1592 {
1593 relocateable = FALSE;
1594 output_bfd = symbol->section->output_section->owner;
1595 }
1596
1597 ret = mips_elf_final_gp (output_bfd, symbol, relocateable, error_message,
1598 &gp);
1599 if (ret != bfd_reloc_ok)
1600 return ret;
1601
1602 return _bfd_mips_elf_gprel16_with_gp (abfd, symbol, reloc_entry,
1603 input_section, relocateable,
1604 data, gp);
1605}
1606
1607/* Do a R_MIPS_GPREL32 relocation. This is a 32 bit value which must
1608 become the offset from the gp register. */
1609
1610static bfd_reloc_status_type
1611mips_elf_gprel32_reloc (abfd, reloc_entry, symbol, data, input_section,
1612 output_bfd, error_message)
1613 bfd *abfd;
1614 arelent *reloc_entry;
1615 asymbol *symbol;
1616 PTR data;
1617 asection *input_section;
1618 bfd *output_bfd;
1619 char **error_message;
1620{
1621 bfd_boolean relocateable;
1622 bfd_reloc_status_type ret;
1623 bfd_vma gp;
1624
1625 GET_RELOC_ADDEND (output_bfd, symbol, reloc_entry, input_section)
1626
1627 /* R_MIPS_GPREL32 relocations are defined for local symbols only.
1628 We will only have an addend if this is a newly created reloc,
1629 not read from an ELF file. */
1630 if (output_bfd != (bfd *) NULL
1631 && (symbol->flags & BSF_SECTION_SYM) == 0
1632 && reloc_entry->addend == 0)
1633 {
1634 *error_message = (char *)
1635 _("32bits gp relative relocation occurs for an external symbol");
1636 return bfd_reloc_outofrange;
1637 }
1638
1639 if (output_bfd != (bfd *) NULL)
1640 {
1641 relocateable = TRUE;
1642 gp = _bfd_get_gp_value (output_bfd);
1643 }
1644 else
1645 {
1646 relocateable = FALSE;
1647 output_bfd = symbol->section->output_section->owner;
1648
1649 ret = mips_elf_final_gp (output_bfd, symbol, relocateable,
1650 error_message, &gp);
1651 if (ret != bfd_reloc_ok)
1652 return ret;
1653 }
1654
1655 return gprel32_with_gp (abfd, symbol, reloc_entry, input_section,
1656 relocateable, data, gp);
1657}
1658
1659static bfd_reloc_status_type
1660gprel32_with_gp (abfd, symbol, reloc_entry, input_section, relocateable, data,
1661 gp)
1662 bfd *abfd;
1663 asymbol *symbol;
1664 arelent *reloc_entry;
1665 asection *input_section;
1666 bfd_boolean relocateable;
1667 PTR data;
1668 bfd_vma gp;
1669{
1670 bfd_vma relocation;
1671 unsigned long val;
1672
1673 if (bfd_is_com_section (symbol->section))
1674 relocation = 0;
1675 else
1676 relocation = symbol->value;
1677
1678 relocation += symbol->section->output_section->vma;
1679 relocation += symbol->section->output_offset;
1680
1681 if (reloc_entry->address > input_section->_cooked_size)
1682 return bfd_reloc_outofrange;
1683
1684 if (reloc_entry->howto->src_mask == 0)
1685 val = 0;
1686 else
1687 val = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
1688
1689 /* Set val to the offset into the section or symbol. */
1690 val += reloc_entry->addend;
1691
1692 /* Adjust val for the final section location and GP value. If we
1693 are producing relocateable output, we don't want to do this for
1694 an external symbol. */
1695 if (! relocateable
1696 || (symbol->flags & BSF_SECTION_SYM) != 0)
1697 val += relocation - gp;
1698
1699 bfd_put_32 (abfd, (bfd_vma) val, (bfd_byte *) data + reloc_entry->address);
1700
1701 if (relocateable)
1702 reloc_entry->address += input_section->output_offset;
1703
1704 return bfd_reloc_ok;
1705}
1706
1707/* Do a R_MIPS_SHIFT6 relocation. The MSB of the shift is stored at bit 2,
1708 the rest is at bits 6-10. The bitpos already got right by the howto. */
1709
1710static bfd_reloc_status_type
1711mips_elf_shift6_reloc (abfd, reloc_entry, symbol, data, input_section,
1712 output_bfd, error_message)
1713 bfd *abfd ATTRIBUTE_UNUSED;
1714 arelent *reloc_entry;
1715 asymbol *symbol;
1716 PTR data ATTRIBUTE_UNUSED;
1717 asection *input_section;
1718 bfd *output_bfd;
1719 char **error_message ATTRIBUTE_UNUSED;
1720{
1721 GET_RELOC_ADDEND (output_bfd, symbol, reloc_entry, input_section)
1722
1723 reloc_entry->addend = (reloc_entry->addend & 0x00007c0)
1724 | (reloc_entry->addend & 0x00000800) >> 9;
1725
1726 SET_RELOC_ADDEND (reloc_entry)
1727
1728 return bfd_reloc_continue;
1729}
1730
1731
1732/* Handle a mips16 jump. */
1733
1734static bfd_reloc_status_type
1735mips16_jump_reloc (abfd, reloc_entry, symbol, data, input_section,
1736 output_bfd, error_message)
1737 bfd *abfd ATTRIBUTE_UNUSED;
1738 arelent *reloc_entry;
1739 asymbol *symbol;
1740 PTR data ATTRIBUTE_UNUSED;
1741 asection *input_section;
1742 bfd *output_bfd;
1743 char **error_message ATTRIBUTE_UNUSED;
1744{
1745 static bfd_boolean warned = FALSE;
1746
1747 GET_RELOC_ADDEND (output_bfd, symbol, reloc_entry, input_section)
1748
1749 /* FIXME. */
1750 if (! warned)
1751 (*_bfd_error_handler)
1752 (_("Linking mips16 objects into %s format is not supported"),
1753 bfd_get_target (input_section->output_section->owner));
1754 warned = TRUE;
1755
1756 return bfd_reloc_undefined;
1757}
1758
1759/* Handle a mips16 GP relative reloc. */
1760
1761static bfd_reloc_status_type
1762mips16_gprel_reloc (abfd, reloc_entry, symbol, data, input_section,
1763 output_bfd, error_message)
1764 bfd *abfd;
1765 arelent *reloc_entry;
1766 asymbol *symbol;
1767 PTR data;
1768 asection *input_section;
1769 bfd *output_bfd;
1770 char **error_message;
1771{
1772 bfd_boolean relocateable;
1773 bfd_reloc_status_type ret;
1774 bfd_vma gp;
1775 unsigned short extend, insn;
1776 unsigned long final;
1777
1778 GET_RELOC_ADDEND (output_bfd, symbol, reloc_entry, input_section)
1779
1780 if (output_bfd != NULL)
1781 relocateable = TRUE;
1782 else
1783 {
1784 relocateable = FALSE;
1785 output_bfd = symbol->section->output_section->owner;
1786 }
1787
1788 ret = mips_elf_final_gp (output_bfd, symbol, relocateable, error_message,
1789 &gp);
1790 if (ret != bfd_reloc_ok)
1791 return ret;
1792
1793 if (reloc_entry->address > input_section->_cooked_size)
1794 return bfd_reloc_outofrange;
1795
1796 /* Pick up the mips16 extend instruction and the real instruction. */
1797 extend = bfd_get_16 (abfd, (bfd_byte *) data + reloc_entry->address);
1798 insn = bfd_get_16 (abfd, (bfd_byte *) data + reloc_entry->address + 2);
1799
1800 /* Stuff the current addend back as a 32 bit value, do the usual
1801 relocation, and then clean up. */
1802 bfd_put_32 (abfd,
1803 (bfd_vma) (((extend & 0x1f) << 11)
1804 | (extend & 0x7e0)
1805 | (insn & 0x1f)),
1806 (bfd_byte *) data + reloc_entry->address);
1807
1808 ret = _bfd_mips_elf_gprel16_with_gp (abfd, symbol, reloc_entry,
1809 input_section, relocateable, data, gp);
1810
1811 final = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
1812 bfd_put_16 (abfd,
1813 (bfd_vma) ((extend & 0xf800)
1814 | ((final >> 11) & 0x1f)
1815 | (final & 0x7e0)),
1816 (bfd_byte *) data + reloc_entry->address);
1817 bfd_put_16 (abfd,
1818 (bfd_vma) ((insn & 0xffe0)
1819 | (final & 0x1f)),
1820 (bfd_byte *) data + reloc_entry->address + 2);
1821
1822 return ret;
1823}
1824
1825#undef GET_RELOC_ADDEND
1826#undef SET_RELOC_ADDEND
1827
1828
1829/* A mapping from BFD reloc types to MIPS ELF reloc types. */
1830
1831struct elf_reloc_map {
1832 bfd_reloc_code_real_type bfd_val;
1833 enum elf_mips_reloc_type elf_val;
1834};
1835
1836static const struct elf_reloc_map mips_reloc_map[] =
1837{
1838 { BFD_RELOC_NONE, R_MIPS_NONE },
1839 { BFD_RELOC_16, R_MIPS_16 },
1840 { BFD_RELOC_32, R_MIPS_32 },
1841 /* There is no BFD reloc for R_MIPS_REL32. */
1842 { BFD_RELOC_CTOR, R_MIPS_32 },
1843 { BFD_RELOC_64, R_MIPS_64 },
1844 { BFD_RELOC_16_PCREL, R_MIPS_PC16 },
1845 { BFD_RELOC_HI16_S, R_MIPS_HI16 },
1846 { BFD_RELOC_LO16, R_MIPS_LO16 },
1847 { BFD_RELOC_GPREL16, R_MIPS_GPREL16 },
1848 { BFD_RELOC_GPREL32, R_MIPS_GPREL32 },
1849 { BFD_RELOC_MIPS_JMP, R_MIPS_26 },
1850 { BFD_RELOC_MIPS_LITERAL, R_MIPS_LITERAL },
1851 { BFD_RELOC_MIPS_GOT16, R_MIPS_GOT16 },
1852 { BFD_RELOC_MIPS_CALL16, R_MIPS_CALL16 },
1853 { BFD_RELOC_MIPS_SHIFT5, R_MIPS_SHIFT5 },
1854 { BFD_RELOC_MIPS_SHIFT6, R_MIPS_SHIFT6 },
1855 { BFD_RELOC_MIPS_GOT_DISP, R_MIPS_GOT_DISP },
1856 { BFD_RELOC_MIPS_GOT_PAGE, R_MIPS_GOT_PAGE },
1857 { BFD_RELOC_MIPS_GOT_OFST, R_MIPS_GOT_OFST },
1858 { BFD_RELOC_MIPS_GOT_HI16, R_MIPS_GOT_HI16 },
1859 { BFD_RELOC_MIPS_GOT_LO16, R_MIPS_GOT_LO16 },
1860 { BFD_RELOC_MIPS_SUB, R_MIPS_SUB },
1861 { BFD_RELOC_MIPS_INSERT_A, R_MIPS_INSERT_A },
1862 { BFD_RELOC_MIPS_INSERT_B, R_MIPS_INSERT_B },
1863 { BFD_RELOC_MIPS_DELETE, R_MIPS_DELETE },
1864 { BFD_RELOC_MIPS_HIGHEST, R_MIPS_HIGHEST },
1865 { BFD_RELOC_MIPS_HIGHER, R_MIPS_HIGHER },
1866 { BFD_RELOC_MIPS_CALL_HI16, R_MIPS_CALL_HI16 },
1867 { BFD_RELOC_MIPS_CALL_LO16, R_MIPS_CALL_LO16 },
1868 { BFD_RELOC_MIPS_SCN_DISP, R_MIPS_SCN_DISP },
1869 { BFD_RELOC_MIPS_REL16, R_MIPS_REL16 },
1870 /* Use of R_MIPS_ADD_IMMEDIATE and R_MIPS_PJUMP is deprecated. */
1871 { BFD_RELOC_MIPS_RELGOT, R_MIPS_RELGOT },
1872 { BFD_RELOC_MIPS_JALR, R_MIPS_JALR }
1873};
1874
1875/* Given a BFD reloc type, return a howto structure. */
1876
1877static reloc_howto_type *
1878bfd_elf32_bfd_reloc_type_lookup (abfd, code)
1879 bfd *abfd ATTRIBUTE_UNUSED;
1880 bfd_reloc_code_real_type code;
1881{
1882 unsigned int i;
1883 /* FIXME: We default to RELA here instead of choosing the right
1884 relocation variant. */
1885 reloc_howto_type *howto_table = elf_mips_howto_table_rela;
1886
1887 for (i = 0; i < sizeof (mips_reloc_map) / sizeof (struct elf_reloc_map);
1888 i++)
1889 {
1890 if (mips_reloc_map[i].bfd_val == code)
1891 return &howto_table[(int) mips_reloc_map[i].elf_val];
1892 }
1893
1894 switch (code)
1895 {
1896 case BFD_RELOC_MIPS16_JMP:
1897 return &elf_mips16_jump_howto;
1898 case BFD_RELOC_MIPS16_GPREL:
1899 return &elf_mips16_gprel_howto;
1900 case BFD_RELOC_VTABLE_INHERIT:
1901 return &elf_mips_gnu_vtinherit_howto;
1902 case BFD_RELOC_VTABLE_ENTRY:
1903 return &elf_mips_gnu_vtentry_howto;
1904 default:
1905 bfd_set_error (bfd_error_bad_value);
1906 return NULL;
1907 }
1908}
1909
1910/* Given a MIPS Elf_Internal_Rel, fill in an arelent structure. */
1911
1912static reloc_howto_type *
1913mips_elf_n32_rtype_to_howto (r_type, rela_p)
1914 unsigned int r_type;
1915 bfd_boolean rela_p;
1916{
1917 switch (r_type)
1918 {
1919 case R_MIPS16_26:
1920 return &elf_mips16_jump_howto;
1921 case R_MIPS16_GPREL:
1922 return &elf_mips16_gprel_howto;
1923 case R_MIPS_GNU_VTINHERIT:
1924 return &elf_mips_gnu_vtinherit_howto;
1925 case R_MIPS_GNU_VTENTRY:
1926 return &elf_mips_gnu_vtentry_howto;
1927 default:
1928 BFD_ASSERT (r_type < (unsigned int) R_MIPS_max);
1929 if (rela_p)
1930 return &elf_mips_howto_table_rela[r_type];
1931 else
1932 return &elf_mips_howto_table_rel[r_type];
1933 break;
1934 }
1935}
1936
1937/* Given a MIPS Elf_Internal_Rel, fill in an arelent structure. */
1938
1939static void
1940mips_info_to_howto_rel (abfd, cache_ptr, dst)
1941 bfd *abfd;
1942 arelent *cache_ptr;
1943 Elf_Internal_Rela *dst;
1944{
1945 unsigned int r_type;
1946
1947 r_type = ELF32_R_TYPE (dst->r_info);
1948 cache_ptr->howto = mips_elf_n32_rtype_to_howto (r_type, FALSE);
1949
1950 /* The addend for a GPREL16 or LITERAL relocation comes from the GP
1951 value for the object file. We get the addend now, rather than
1952 when we do the relocation, because the symbol manipulations done
1953 by the linker may cause us to lose track of the input BFD. */
1954 if (((*cache_ptr->sym_ptr_ptr)->flags & BSF_SECTION_SYM) != 0
1955 && (r_type == (unsigned int) R_MIPS_GPREL16
1956 || r_type == (unsigned int) R_MIPS_LITERAL))
1957 cache_ptr->addend = elf_gp (abfd);
1958}
1959
1960/* Given a MIPS Elf_Internal_Rela, fill in an arelent structure. */
1961
1962static void
1963mips_info_to_howto_rela (abfd, cache_ptr, dst)
1964 bfd *abfd ATTRIBUTE_UNUSED;
1965 arelent *cache_ptr;
1966 Elf_Internal_Rela *dst;
1967{
1968 unsigned int r_type;
1969
1970 r_type = ELF32_R_TYPE (dst->r_info);
1971 cache_ptr->howto = mips_elf_n32_rtype_to_howto (r_type, TRUE);
1972 cache_ptr->addend = dst->r_addend;
1973}
1974
1975
1976/* Determine whether a symbol is global for the purposes of splitting
1977 the symbol table into global symbols and local symbols. At least
1978 on Irix 5, this split must be between section symbols and all other
1979 symbols. On most ELF targets the split is between static symbols
1980 and externally visible symbols. */
1981
1982static bfd_boolean
1983mips_elf_sym_is_global (abfd, sym)
1984 bfd *abfd ATTRIBUTE_UNUSED;
1985 asymbol *sym;
1986{
1987 if (SGI_COMPAT (abfd))
1988 return (sym->flags & BSF_SECTION_SYM) == 0;
1989 else
1990 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
1991 || bfd_is_und_section (bfd_get_section (sym))
1992 || bfd_is_com_section (bfd_get_section (sym)));
1993}
1994
1995
1996/* Set the right machine number for a MIPS ELF file. */
1997
1998static bfd_boolean
1999mips_elf_n32_object_p (abfd)
2000 bfd *abfd;
2001{
2002 unsigned long mach;
2003
2004 /* Irix 5 and 6 are broken. Object file symbol tables are not always
2005 sorted correctly such that local symbols precede global symbols,
2006 and the sh_info field in the symbol table is not always right. */
2007 if (SGI_COMPAT (abfd))
2008 elf_bad_symtab (abfd) = TRUE;
2009
2010 mach = _bfd_elf_mips_mach (elf_elfheader (abfd)->e_flags);
2011 bfd_default_set_arch_mach (abfd, bfd_arch_mips, mach);
2012
2013 if (! ABI_N32_P(abfd))
2014 return FALSE;
2015
2016 return TRUE;
2017}
2018
2019
2020/* Support for core dump NOTE sections. */
2021static bfd_boolean
2022elf32_mips_grok_prstatus (abfd, note)
2023 bfd *abfd;
2024 Elf_Internal_Note *note;
2025{
2026 int offset;
2027 unsigned int raw_size;
2028
2029 switch (note->descsz)
2030 {
2031 default:
2032 return FALSE;
2033
2034 case 440: /* Linux/MIPS N32 */
2035 /* pr_cursig */
2036 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2037
2038 /* pr_pid */
2039 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
2040
2041 /* pr_reg */
2042 offset = 72;
2043 raw_size = 360;
2044
2045 break;
2046 }
2047
2048 /* Make a ".reg/999" section. */
2049 return _bfd_elfcore_make_pseudosection (abfd, ".reg", raw_size,
2050 note->descpos + offset);
2051}
2052
2053static bfd_boolean
2054elf32_mips_grok_psinfo (abfd, note)
2055 bfd *abfd;
2056 Elf_Internal_Note *note;
2057{
2058 switch (note->descsz)
2059 {
2060 default:
2061 return FALSE;
2062
2063 case 128: /* Linux/MIPS elf_prpsinfo */
2064 elf_tdata (abfd)->core_program
2065 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2066 elf_tdata (abfd)->core_command
2067 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2068 }
2069
2070 /* Note that for some reason, a spurious space is tacked
2071 onto the end of the args in some (at least one anyway)
2072 implementations, so strip it off if it exists. */
2073
2074 {
2075 char *command = elf_tdata (abfd)->core_command;
2076 int n = strlen (command);
2077
2078 if (0 < n && command[n - 1] == ' ')
2079 command[n - 1] = '\0';
2080 }
2081
2082 return TRUE;
2083}
2084
2085
2086/* Depending on the target vector we generate some version of Irix
2087 executables or "normal" MIPS ELF ABI executables. */
2088static irix_compat_t
2089elf_n32_mips_irix_compat (abfd)
2090 bfd *abfd;
2091{
2092 if ((abfd->xvec == &bfd_elf32_nbigmips_vec)
2093 || (abfd->xvec == &bfd_elf32_nlittlemips_vec))
2094 return ict_irix6;
2095 else
2096 return ict_none;
2097}
2098
2099
2100/* ECOFF swapping routines. These are used when dealing with the
2101 .mdebug section, which is in the ECOFF debugging format. */
2102static const struct ecoff_debug_swap mips_elf32_ecoff_debug_swap = {
2103 /* Symbol table magic number. */
2104 magicSym,
2105 /* Alignment of debugging information. E.g., 4. */
2106 4,
2107 /* Sizes of external symbolic information. */
2108 sizeof (struct hdr_ext),
2109 sizeof (struct dnr_ext),
2110 sizeof (struct pdr_ext),
2111 sizeof (struct sym_ext),
2112 sizeof (struct opt_ext),
2113 sizeof (struct fdr_ext),
2114 sizeof (struct rfd_ext),
2115 sizeof (struct ext_ext),
2116 /* Functions to swap in external symbolic data. */
2117 ecoff_swap_hdr_in,
2118 ecoff_swap_dnr_in,
2119 ecoff_swap_pdr_in,
2120 ecoff_swap_sym_in,
2121 ecoff_swap_opt_in,
2122 ecoff_swap_fdr_in,
2123 ecoff_swap_rfd_in,
2124 ecoff_swap_ext_in,
2125 _bfd_ecoff_swap_tir_in,
2126 _bfd_ecoff_swap_rndx_in,
2127 /* Functions to swap out external symbolic data. */
2128 ecoff_swap_hdr_out,
2129 ecoff_swap_dnr_out,
2130 ecoff_swap_pdr_out,
2131 ecoff_swap_sym_out,
2132 ecoff_swap_opt_out,
2133 ecoff_swap_fdr_out,
2134 ecoff_swap_rfd_out,
2135 ecoff_swap_ext_out,
2136 _bfd_ecoff_swap_tir_out,
2137 _bfd_ecoff_swap_rndx_out,
2138 /* Function to read in symbolic data. */
2139 _bfd_mips_elf_read_ecoff_info
2140};
2141
2142
2143#define ELF_ARCH bfd_arch_mips
2144#define ELF_MACHINE_CODE EM_MIPS
2145
2146/* The SVR4 MIPS ABI says that this should be 0x10000, but Irix 5 uses
2147 a value of 0x1000, and we are compatible.
2148 FIXME: How does this affect NewABI? */
2149#define ELF_MAXPAGESIZE 0x1000
2150
2151#define elf_backend_collect TRUE
2152#define elf_backend_type_change_ok TRUE
2153#define elf_backend_can_gc_sections TRUE
2154#define elf_info_to_howto mips_info_to_howto_rela
2155#define elf_info_to_howto_rel mips_info_to_howto_rel
2156#define elf_backend_sym_is_global mips_elf_sym_is_global
2157#define elf_backend_object_p mips_elf_n32_object_p
2158#define elf_backend_symbol_processing _bfd_mips_elf_symbol_processing
2159#define elf_backend_section_processing _bfd_mips_elf_section_processing
2160#define elf_backend_section_from_shdr _bfd_mips_elf_section_from_shdr
2161#define elf_backend_fake_sections _bfd_mips_elf_fake_sections
2162#define elf_backend_section_from_bfd_section \
2163 _bfd_mips_elf_section_from_bfd_section
2164#define elf_backend_add_symbol_hook _bfd_mips_elf_add_symbol_hook
2165#define elf_backend_link_output_symbol_hook \
2166 _bfd_mips_elf_link_output_symbol_hook
2167#define elf_backend_create_dynamic_sections \
2168 _bfd_mips_elf_create_dynamic_sections
2169#define elf_backend_check_relocs _bfd_mips_elf_check_relocs
2170#define elf_backend_adjust_dynamic_symbol \
2171 _bfd_mips_elf_adjust_dynamic_symbol
2172#define elf_backend_always_size_sections \
2173 _bfd_mips_elf_always_size_sections
2174#define elf_backend_size_dynamic_sections \
2175 _bfd_mips_elf_size_dynamic_sections
2176#define elf_backend_relocate_section _bfd_mips_elf_relocate_section
2177#define elf_backend_finish_dynamic_symbol \
2178 _bfd_mips_elf_finish_dynamic_symbol
2179#define elf_backend_finish_dynamic_sections \
2180 _bfd_mips_elf_finish_dynamic_sections
2181#define elf_backend_final_write_processing \
2182 _bfd_mips_elf_final_write_processing
2183#define elf_backend_additional_program_headers \
2184 _bfd_mips_elf_additional_program_headers
2185#define elf_backend_modify_segment_map _bfd_mips_elf_modify_segment_map
2186#define elf_backend_gc_mark_hook _bfd_mips_elf_gc_mark_hook
2187#define elf_backend_gc_sweep_hook _bfd_mips_elf_gc_sweep_hook
2188#define elf_backend_copy_indirect_symbol \
2189 _bfd_mips_elf_copy_indirect_symbol
2190#define elf_backend_hide_symbol _bfd_mips_elf_hide_symbol
2191#define elf_backend_grok_prstatus elf32_mips_grok_prstatus
2192#define elf_backend_grok_psinfo elf32_mips_grok_psinfo
2193#define elf_backend_ecoff_debug_swap &mips_elf32_ecoff_debug_swap
2194
2195#define elf_backend_got_header_size (4 * MIPS_RESERVED_GOTNO)
2196#define elf_backend_plt_header_size 0
2197
2198/* MIPS n32 ELF can use a mixture of REL and RELA, but some Relocations
2199 work better/work only in RELA, so we default to this. */
2200#define elf_backend_may_use_rel_p 1
2201#define elf_backend_may_use_rela_p 1
2202#define elf_backend_default_use_rela_p 1
2203#define elf_backend_sign_extend_vma TRUE
2204
2205#define elf_backend_discard_info _bfd_mips_elf_discard_info
2206#define elf_backend_ignore_discarded_relocs \
2207 _bfd_mips_elf_ignore_discarded_relocs
2208#define elf_backend_write_section _bfd_mips_elf_write_section
2209#define elf_backend_mips_irix_compat elf_n32_mips_irix_compat
2210#define elf_backend_mips_rtype_to_howto mips_elf_n32_rtype_to_howto
2211#define bfd_elf32_find_nearest_line _bfd_mips_elf_find_nearest_line
2212#define bfd_elf32_new_section_hook _bfd_mips_elf_new_section_hook
2213#define bfd_elf32_set_section_contents _bfd_mips_elf_set_section_contents
2214#define bfd_elf32_bfd_get_relocated_section_contents \
2215 _bfd_elf_mips_get_relocated_section_contents
2216#define bfd_elf32_bfd_link_hash_table_create \
2217 _bfd_mips_elf_link_hash_table_create
2218#define bfd_elf32_bfd_final_link _bfd_mips_elf_final_link
2219#define bfd_elf32_bfd_merge_private_bfd_data \
2220 _bfd_mips_elf_merge_private_bfd_data
2221#define bfd_elf32_bfd_set_private_flags _bfd_mips_elf_set_private_flags
2222#define bfd_elf32_bfd_print_private_bfd_data \
2223 _bfd_mips_elf_print_private_bfd_data
2224#define bfd_elf32_bfd_relax_section _bfd_mips_relax_section
2225
2226/* Support for SGI-ish mips targets using n32 ABI. */
2227
2228#define TARGET_LITTLE_SYM bfd_elf32_nlittlemips_vec
2229#define TARGET_LITTLE_NAME "elf32-nlittlemips"
2230#define TARGET_BIG_SYM bfd_elf32_nbigmips_vec
2231#define TARGET_BIG_NAME "elf32-nbigmips"
2232
2233#include "elf32-target.h"
2234
2235/* Support for traditional mips targets using n32 ABI. */
2236#define INCLUDED_TARGET_FILE /* More a type of flag. */
2237
2238#undef TARGET_LITTLE_SYM
2239#undef TARGET_LITTLE_NAME
2240#undef TARGET_BIG_SYM
2241#undef TARGET_BIG_NAME
2242
2243#define TARGET_LITTLE_SYM bfd_elf32_ntradlittlemips_vec
2244#define TARGET_LITTLE_NAME "elf32-ntradlittlemips"
2245#define TARGET_BIG_SYM bfd_elf32_ntradbigmips_vec
2246#define TARGET_BIG_NAME "elf32-ntradbigmips"
2247
2248/* Include the target file again for this target. */
2249#include "elf32-target.h"
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