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* alpha-tdep.c (alpha_register_type): Change from _virtual_type.
[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 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_reloc_status_type mips_elf_generic_reloc
51 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
52 static bfd_reloc_status_type mips_elf_hi16_reloc
53 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
54 static bfd_reloc_status_type mips_elf_lo16_reloc
55 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
56 static bfd_reloc_status_type mips_elf_got16_reloc
57 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
58 static bfd_boolean mips_elf_assign_gp
59 PARAMS ((bfd *, bfd_vma *));
60 static bfd_reloc_status_type mips_elf_final_gp
61 PARAMS ((bfd *, asymbol *, bfd_boolean, char **, bfd_vma *));
62 static bfd_reloc_status_type mips_elf_gprel16_reloc
63 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
64 static bfd_reloc_status_type mips_elf_literal_reloc
65 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
66 static bfd_reloc_status_type mips_elf_gprel32_reloc
67 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
68 static bfd_reloc_status_type gprel32_with_gp
69 PARAMS ((bfd *, asymbol *, arelent *, asection *, bfd_boolean, PTR,
70 bfd_vma));
71 static bfd_reloc_status_type mips_elf_shift6_reloc
72 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
73 static bfd_reloc_status_type mips16_jump_reloc
74 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
75 static bfd_reloc_status_type mips16_gprel_reloc
76 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
77 static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
78 PARAMS ((bfd *, bfd_reloc_code_real_type));
79 static reloc_howto_type *mips_elf_n32_rtype_to_howto
80 PARAMS ((unsigned int, bfd_boolean));
81 static void mips_info_to_howto_rel
82 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
83 static void mips_info_to_howto_rela
84 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
85 static bfd_boolean mips_elf_sym_is_global
86 PARAMS ((bfd *, asymbol *));
87 static bfd_boolean mips_elf_n32_object_p
88 PARAMS ((bfd *));
89 static bfd_boolean elf32_mips_grok_prstatus
90 PARAMS ((bfd *, Elf_Internal_Note *));
91 static bfd_boolean elf32_mips_grok_psinfo
92 PARAMS ((bfd *, Elf_Internal_Note *));
93 static irix_compat_t elf_n32_mips_irix_compat
94 PARAMS ((bfd *));
95
96 extern const bfd_target bfd_elf32_nbigmips_vec;
97 extern const bfd_target bfd_elf32_nlittlemips_vec;
98
99 static asection *prev_reloc_section = NULL;
100 static bfd_vma prev_reloc_address = -1;
101 static 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
120 static 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
620 static 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. */
1136 static 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. */
1155 static 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 */
1171 static 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 */
1187 static 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 \f
1202 /* 16 bit offset for pc-relative branches. */
1203 static reloc_howto_type elf_mips_gnu_rel16_s2 =
1204 HOWTO (R_MIPS_GNU_REL16_S2, /* type */
1205 2, /* rightshift */
1206 2, /* size (0 = byte, 1 = short, 2 = long) */
1207 16, /* bitsize */
1208 TRUE, /* pc_relative */
1209 0, /* bitpos */
1210 complain_overflow_signed, /* complain_on_overflow */
1211 mips_elf_generic_reloc, /* special_function */
1212 "R_MIPS_GNU_REL16_S2", /* name */
1213 TRUE, /* partial_inplace */
1214 0x0000ffff, /* src_mask */
1215 0x0000ffff, /* dst_mask */
1216 TRUE); /* pcrel_offset */
1217
1218 /* 16 bit offset for pc-relative branches. */
1219 static reloc_howto_type elf_mips_gnu_rela16_s2 =
1220 HOWTO (R_MIPS_GNU_REL16_S2, /* type */
1221 2, /* rightshift */
1222 2, /* size (0 = byte, 1 = short, 2 = long) */
1223 16, /* bitsize */
1224 TRUE, /* pc_relative */
1225 0, /* bitpos */
1226 complain_overflow_signed, /* complain_on_overflow */
1227 mips_elf_generic_reloc, /* special_function */
1228 "R_MIPS_GNU_REL16_S2", /* name */
1229 FALSE, /* partial_inplace */
1230 0, /* src_mask */
1231 0x0000ffff, /* dst_mask */
1232 TRUE); /* pcrel_offset */
1233 \f
1234 /* This is derived from bfd_elf_generic_reloc. NewABI allows us to have
1235 several relocations against the same address. The addend is derived
1236 from the addends of preceding relocations. If we don't need to
1237 do something special, we simply keep track of the addend. */
1238
1239 #define GET_RELOC_ADDEND(obfd, sym, entry, sec) \
1240 { \
1241 /* If we're relocating, and this is an external symbol, we don't \
1242 want to change anything. */ \
1243 if ((obfd) != (bfd *) NULL \
1244 && ((sym)->flags & BSF_SECTION_SYM) == 0 \
1245 && (! (entry)->howto->partial_inplace \
1246 || (entry)->addend == 0)) \
1247 { \
1248 (entry)->address += (sec)->output_offset; \
1249 return bfd_reloc_ok; \
1250 } \
1251 \
1252 /* The addend of combined relocs is remembered and left for \
1253 subsequent relocs. */ \
1254 if (prev_reloc_address != (entry)->address \
1255 || prev_reloc_section != (sec)) \
1256 { \
1257 prev_reloc_section = (sec); \
1258 prev_reloc_address = (entry)->address; \
1259 prev_reloc_addend = (entry)->addend; \
1260 } \
1261 else \
1262 (entry)->addend = prev_reloc_addend; \
1263 }
1264
1265 #define SET_RELOC_ADDEND(entry) \
1266 { \
1267 prev_reloc_addend = (entry)->addend; \
1268 }
1269
1270 static bfd_reloc_status_type
1271 mips_elf_generic_reloc (abfd, reloc_entry, symbol, data, input_section,
1272 output_bfd, error_message)
1273 bfd *abfd ATTRIBUTE_UNUSED;
1274 arelent *reloc_entry;
1275 asymbol *symbol;
1276 PTR data ATTRIBUTE_UNUSED;
1277 asection *input_section;
1278 bfd *output_bfd;
1279 char **error_message ATTRIBUTE_UNUSED;
1280 {
1281 GET_RELOC_ADDEND (output_bfd, symbol, reloc_entry, input_section)
1282
1283 return bfd_reloc_continue;
1284 }
1285 \f
1286 /* Do a R_MIPS_HI16 relocation. This has to be done in combination
1287 with a R_MIPS_LO16 reloc, because there is a carry from the LO16 to
1288 the HI16. Here we just save the information we need; we do the
1289 actual relocation when we see the LO16.
1290
1291 MIPS ELF requires that the LO16 immediately follow the HI16. As a
1292 GNU extension, for non-pc-relative relocations, we permit an
1293 arbitrary number of HI16 relocs to be associated with a single LO16
1294 reloc. This extension permits gcc to output the HI and LO relocs
1295 itself.
1296
1297 This cannot be done for PC-relative relocations because both the HI16
1298 and LO16 parts of the relocations must be done relative to the LO16
1299 part, and there can be carry to or borrow from the HI16 part. */
1300
1301 struct mips_hi16
1302 {
1303 struct mips_hi16 *next;
1304 bfd_byte *addr;
1305 bfd_vma addend;
1306 };
1307
1308 /* FIXME: This should not be a static variable. */
1309
1310 static struct mips_hi16 *mips_hi16_list;
1311
1312 static bfd_reloc_status_type
1313 mips_elf_hi16_reloc (abfd, reloc_entry, symbol, data, input_section,
1314 output_bfd, error_message)
1315 bfd *abfd ATTRIBUTE_UNUSED;
1316 arelent *reloc_entry;
1317 asymbol *symbol;
1318 PTR data;
1319 asection *input_section;
1320 bfd *output_bfd;
1321 char **error_message ATTRIBUTE_UNUSED;
1322 {
1323 bfd_reloc_status_type ret;
1324 bfd_vma relocation;
1325 struct mips_hi16 *n;
1326
1327 GET_RELOC_ADDEND (output_bfd, symbol, reloc_entry, input_section)
1328
1329 ret = bfd_reloc_ok;
1330
1331 if (bfd_is_und_section (symbol->section) && output_bfd == (bfd *) NULL)
1332 ret = bfd_reloc_undefined;
1333
1334 if (bfd_is_com_section (symbol->section))
1335 relocation = 0;
1336 else
1337 relocation = symbol->value;
1338
1339 relocation += symbol->section->output_section->vma;
1340 relocation += symbol->section->output_offset;
1341 relocation += reloc_entry->addend;
1342
1343 if (reloc_entry->address > input_section->_cooked_size)
1344 return bfd_reloc_outofrange;
1345
1346 /* Save the information, and let LO16 do the actual relocation. */
1347 n = (struct mips_hi16 *) bfd_malloc ((bfd_size_type) sizeof *n);
1348 if (n == NULL)
1349 return bfd_reloc_outofrange;
1350 n->addr = (bfd_byte *) data + reloc_entry->address;
1351 n->addend = relocation;
1352 n->next = mips_hi16_list;
1353 mips_hi16_list = n;
1354
1355 if (output_bfd != (bfd *) NULL)
1356 reloc_entry->address += input_section->output_offset;
1357
1358 return ret;
1359 }
1360
1361 /* Do a R_MIPS_LO16 relocation. This is a straightforward 16 bit
1362 inplace relocation; this function exists in order to do the
1363 R_MIPS_HI16 relocation described above. */
1364
1365 static bfd_reloc_status_type
1366 mips_elf_lo16_reloc (abfd, reloc_entry, symbol, data, input_section,
1367 output_bfd, error_message)
1368 bfd *abfd;
1369 arelent *reloc_entry;
1370 asymbol *symbol;
1371 PTR data;
1372 asection *input_section;
1373 bfd *output_bfd;
1374 char **error_message;
1375 {
1376 if (mips_hi16_list != NULL)
1377 {
1378 struct mips_hi16 *l;
1379
1380 l = mips_hi16_list;
1381 while (l != NULL)
1382 {
1383 unsigned long insn;
1384 unsigned long val;
1385 unsigned long vallo;
1386 struct mips_hi16 *next;
1387
1388 /* Do the HI16 relocation. Note that we actually don't need
1389 to know anything about the LO16 itself, except where to
1390 find the low 16 bits of the addend needed by the LO16. */
1391 insn = bfd_get_32 (abfd, l->addr);
1392 vallo = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
1393
1394 /* The low order 16 bits are always treated as a signed
1395 value. */
1396 vallo = ((vallo & 0xffff) ^ 0x8000) - 0x8000;
1397 val = ((insn & 0xffff) << 16) + vallo;
1398 val += l->addend;
1399
1400 /* If PC-relative, we need to subtract out the address of the LO
1401 half of the HI/LO. (The actual relocation is relative
1402 to that instruction.) */
1403 if (reloc_entry->howto->pc_relative)
1404 val -= reloc_entry->address;
1405
1406 /* At this point, "val" has the value of the combined HI/LO
1407 pair. If the low order 16 bits (which will be used for
1408 the LO16 insn) are negative, then we will need an
1409 adjustment for the high order 16 bits. */
1410 val += 0x8000;
1411 val = (val >> 16) & 0xffff;
1412
1413 insn &= ~ (bfd_vma) 0xffff;
1414 insn |= val;
1415 bfd_put_32 (abfd, (bfd_vma) insn, l->addr);
1416
1417 next = l->next;
1418 free (l);
1419 l = next;
1420 }
1421
1422 mips_hi16_list = NULL;
1423 }
1424
1425 /* Now do the LO16 reloc in the usual way. */
1426 return mips_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1427 input_section, output_bfd, error_message);
1428 }
1429
1430 /* Do a R_MIPS_GOT16 reloc. This is a reloc against the global offset
1431 table used for PIC code. If the symbol is an external symbol, the
1432 instruction is modified to contain the offset of the appropriate
1433 entry in the global offset table. If the symbol is a section
1434 symbol, the next reloc is a R_MIPS_LO16 reloc. The two 16 bit
1435 addends are combined to form the real addend against the section
1436 symbol; the GOT16 is modified to contain the offset of an entry in
1437 the global offset table, and the LO16 is modified to offset it
1438 appropriately. Thus an offset larger than 16 bits requires a
1439 modified value in the global offset table.
1440
1441 This implementation suffices for the assembler, but the linker does
1442 not yet know how to create global offset tables. */
1443
1444 static bfd_reloc_status_type
1445 mips_elf_got16_reloc (abfd, reloc_entry, symbol, data, input_section,
1446 output_bfd, error_message)
1447 bfd *abfd;
1448 arelent *reloc_entry;
1449 asymbol *symbol;
1450 PTR data;
1451 asection *input_section;
1452 bfd *output_bfd;
1453 char **error_message;
1454 {
1455 /* If we're relocating, and this is a local symbol, we can handle it
1456 just like HI16. */
1457 if (output_bfd != (bfd *) NULL
1458 && (symbol->flags & BSF_SECTION_SYM) != 0)
1459 return mips_elf_hi16_reloc (abfd, reloc_entry, symbol, data,
1460 input_section, output_bfd, error_message);
1461
1462 /* Otherwise we try to handle it as R_MIPS_GOT_DISP. */
1463 return mips_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1464 input_section, output_bfd, error_message);
1465 }
1466
1467 /* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a
1468 dangerous relocation. */
1469
1470 static bfd_boolean
1471 mips_elf_assign_gp (output_bfd, pgp)
1472 bfd *output_bfd;
1473 bfd_vma *pgp;
1474 {
1475 unsigned int count;
1476 asymbol **sym;
1477 unsigned int i;
1478
1479 /* If we've already figured out what GP will be, just return it. */
1480 *pgp = _bfd_get_gp_value (output_bfd);
1481 if (*pgp)
1482 return TRUE;
1483
1484 count = bfd_get_symcount (output_bfd);
1485 sym = bfd_get_outsymbols (output_bfd);
1486
1487 /* The linker script will have created a symbol named `_gp' with the
1488 appropriate value. */
1489 if (sym == (asymbol **) NULL)
1490 i = count;
1491 else
1492 {
1493 for (i = 0; i < count; i++, sym++)
1494 {
1495 register const char *name;
1496
1497 name = bfd_asymbol_name (*sym);
1498 if (*name == '_' && strcmp (name, "_gp") == 0)
1499 {
1500 *pgp = bfd_asymbol_value (*sym);
1501 _bfd_set_gp_value (output_bfd, *pgp);
1502 break;
1503 }
1504 }
1505 }
1506
1507 if (i >= count)
1508 {
1509 /* Only get the error once. */
1510 *pgp = 4;
1511 _bfd_set_gp_value (output_bfd, *pgp);
1512 return FALSE;
1513 }
1514
1515 return TRUE;
1516 }
1517
1518 /* We have to figure out the gp value, so that we can adjust the
1519 symbol value correctly. We look up the symbol _gp in the output
1520 BFD. If we can't find it, we're stuck. We cache it in the ELF
1521 target data. We don't need to adjust the symbol value for an
1522 external symbol if we are producing relocateable output. */
1523
1524 static bfd_reloc_status_type
1525 mips_elf_final_gp (output_bfd, symbol, relocateable, error_message, pgp)
1526 bfd *output_bfd;
1527 asymbol *symbol;
1528 bfd_boolean relocateable;
1529 char **error_message;
1530 bfd_vma *pgp;
1531 {
1532 if (bfd_is_und_section (symbol->section)
1533 && ! relocateable)
1534 {
1535 *pgp = 0;
1536 return bfd_reloc_undefined;
1537 }
1538
1539 *pgp = _bfd_get_gp_value (output_bfd);
1540 if (*pgp == 0
1541 && (! relocateable
1542 || (symbol->flags & BSF_SECTION_SYM) != 0))
1543 {
1544 if (relocateable)
1545 {
1546 /* Make up a value. */
1547 *pgp = symbol->section->output_section->vma /*+ 0x4000*/;
1548 _bfd_set_gp_value (output_bfd, *pgp);
1549 }
1550 else if (!mips_elf_assign_gp (output_bfd, pgp))
1551 {
1552 *error_message =
1553 (char *) _("GP relative relocation when _gp not defined");
1554 return bfd_reloc_dangerous;
1555 }
1556 }
1557
1558 return bfd_reloc_ok;
1559 }
1560
1561 /* Do a R_MIPS_GPREL16 relocation. This is a 16 bit value which must
1562 become the offset from the gp register. */
1563
1564 static bfd_reloc_status_type
1565 mips_elf_gprel16_reloc (abfd, reloc_entry, symbol, data, input_section,
1566 output_bfd, error_message)
1567 bfd *abfd ATTRIBUTE_UNUSED;
1568 arelent *reloc_entry;
1569 asymbol *symbol;
1570 PTR data ATTRIBUTE_UNUSED;
1571 asection *input_section;
1572 bfd *output_bfd;
1573 char **error_message ATTRIBUTE_UNUSED;
1574 {
1575 bfd_boolean relocateable;
1576 bfd_reloc_status_type ret;
1577 bfd_vma gp;
1578
1579 GET_RELOC_ADDEND (output_bfd, symbol, reloc_entry, input_section)
1580
1581 if (output_bfd != (bfd *) NULL)
1582 relocateable = TRUE;
1583 else
1584 {
1585 relocateable = FALSE;
1586 output_bfd = symbol->section->output_section->owner;
1587 }
1588
1589 ret = mips_elf_final_gp (output_bfd, symbol, relocateable, error_message,
1590 &gp);
1591 if (ret != bfd_reloc_ok)
1592 return ret;
1593
1594 return _bfd_mips_elf_gprel16_with_gp (abfd, symbol, reloc_entry,
1595 input_section, relocateable,
1596 data, gp);
1597 }
1598
1599 /* Do a R_MIPS_LITERAL relocation. */
1600
1601 static bfd_reloc_status_type
1602 mips_elf_literal_reloc (abfd, reloc_entry, symbol, data, input_section,
1603 output_bfd, error_message)
1604 bfd *abfd;
1605 arelent *reloc_entry;
1606 asymbol *symbol;
1607 PTR data;
1608 asection *input_section;
1609 bfd *output_bfd;
1610 char **error_message;
1611 {
1612 bfd_boolean relocateable;
1613 bfd_reloc_status_type ret;
1614 bfd_vma gp;
1615
1616 GET_RELOC_ADDEND (output_bfd, symbol, reloc_entry, input_section)
1617
1618 /* FIXME: The entries in the .lit8 and .lit4 sections should be merged. */
1619 if (output_bfd != (bfd *) NULL)
1620 relocateable = TRUE;
1621 else
1622 {
1623 relocateable = FALSE;
1624 output_bfd = symbol->section->output_section->owner;
1625 }
1626
1627 ret = mips_elf_final_gp (output_bfd, symbol, relocateable, error_message,
1628 &gp);
1629 if (ret != bfd_reloc_ok)
1630 return ret;
1631
1632 return _bfd_mips_elf_gprel16_with_gp (abfd, symbol, reloc_entry,
1633 input_section, relocateable,
1634 data, gp);
1635 }
1636
1637 /* Do a R_MIPS_GPREL32 relocation. This is a 32 bit value which must
1638 become the offset from the gp register. */
1639
1640 static bfd_reloc_status_type
1641 mips_elf_gprel32_reloc (abfd, reloc_entry, symbol, data, input_section,
1642 output_bfd, error_message)
1643 bfd *abfd;
1644 arelent *reloc_entry;
1645 asymbol *symbol;
1646 PTR data;
1647 asection *input_section;
1648 bfd *output_bfd;
1649 char **error_message;
1650 {
1651 bfd_boolean relocateable;
1652 bfd_reloc_status_type ret;
1653 bfd_vma gp;
1654
1655 GET_RELOC_ADDEND (output_bfd, symbol, reloc_entry, input_section)
1656
1657 /* R_MIPS_GPREL32 relocations are defined for local symbols only.
1658 We will only have an addend if this is a newly created reloc,
1659 not read from an ELF file. */
1660 if (output_bfd != (bfd *) NULL
1661 && (symbol->flags & BSF_SECTION_SYM) == 0
1662 && reloc_entry->addend == 0)
1663 {
1664 *error_message = (char *)
1665 _("32bits gp relative relocation occurs for an external symbol");
1666 return bfd_reloc_outofrange;
1667 }
1668
1669 if (output_bfd != (bfd *) NULL)
1670 {
1671 relocateable = TRUE;
1672 gp = _bfd_get_gp_value (output_bfd);
1673 }
1674 else
1675 {
1676 relocateable = FALSE;
1677 output_bfd = symbol->section->output_section->owner;
1678
1679 ret = mips_elf_final_gp (output_bfd, symbol, relocateable,
1680 error_message, &gp);
1681 if (ret != bfd_reloc_ok)
1682 return ret;
1683 }
1684
1685 return gprel32_with_gp (abfd, symbol, reloc_entry, input_section,
1686 relocateable, data, gp);
1687 }
1688
1689 static bfd_reloc_status_type
1690 gprel32_with_gp (abfd, symbol, reloc_entry, input_section, relocateable, data,
1691 gp)
1692 bfd *abfd;
1693 asymbol *symbol;
1694 arelent *reloc_entry;
1695 asection *input_section;
1696 bfd_boolean relocateable;
1697 PTR data;
1698 bfd_vma gp;
1699 {
1700 bfd_vma relocation;
1701 unsigned long val;
1702
1703 if (bfd_is_com_section (symbol->section))
1704 relocation = 0;
1705 else
1706 relocation = symbol->value;
1707
1708 relocation += symbol->section->output_section->vma;
1709 relocation += symbol->section->output_offset;
1710
1711 if (reloc_entry->address > input_section->_cooked_size)
1712 return bfd_reloc_outofrange;
1713
1714 if (reloc_entry->howto->src_mask == 0)
1715 val = 0;
1716 else
1717 val = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
1718
1719 /* Set val to the offset into the section or symbol. */
1720 val += reloc_entry->addend;
1721
1722 /* Adjust val for the final section location and GP value. If we
1723 are producing relocateable output, we don't want to do this for
1724 an external symbol. */
1725 if (! relocateable
1726 || (symbol->flags & BSF_SECTION_SYM) != 0)
1727 val += relocation - gp;
1728
1729 bfd_put_32 (abfd, (bfd_vma) val, (bfd_byte *) data + reloc_entry->address);
1730
1731 if (relocateable)
1732 reloc_entry->address += input_section->output_offset;
1733
1734 return bfd_reloc_ok;
1735 }
1736
1737 /* Do a R_MIPS_SHIFT6 relocation. The MSB of the shift is stored at bit 2,
1738 the rest is at bits 6-10. The bitpos already got right by the howto. */
1739
1740 static bfd_reloc_status_type
1741 mips_elf_shift6_reloc (abfd, reloc_entry, symbol, data, input_section,
1742 output_bfd, error_message)
1743 bfd *abfd ATTRIBUTE_UNUSED;
1744 arelent *reloc_entry;
1745 asymbol *symbol;
1746 PTR data ATTRIBUTE_UNUSED;
1747 asection *input_section;
1748 bfd *output_bfd;
1749 char **error_message ATTRIBUTE_UNUSED;
1750 {
1751 GET_RELOC_ADDEND (output_bfd, symbol, reloc_entry, input_section)
1752
1753 reloc_entry->addend = (reloc_entry->addend & 0x00007c0)
1754 | (reloc_entry->addend & 0x00000800) >> 9;
1755
1756 SET_RELOC_ADDEND (reloc_entry)
1757
1758 return bfd_reloc_continue;
1759 }
1760 \f
1761 /* Handle a mips16 jump. */
1762
1763 static bfd_reloc_status_type
1764 mips16_jump_reloc (abfd, reloc_entry, symbol, data, input_section,
1765 output_bfd, error_message)
1766 bfd *abfd ATTRIBUTE_UNUSED;
1767 arelent *reloc_entry;
1768 asymbol *symbol;
1769 PTR data ATTRIBUTE_UNUSED;
1770 asection *input_section;
1771 bfd *output_bfd;
1772 char **error_message ATTRIBUTE_UNUSED;
1773 {
1774 static bfd_boolean warned = FALSE;
1775
1776 GET_RELOC_ADDEND (output_bfd, symbol, reloc_entry, input_section)
1777
1778 /* FIXME. */
1779 if (! warned)
1780 (*_bfd_error_handler)
1781 (_("Linking mips16 objects into %s format is not supported"),
1782 bfd_get_target (input_section->output_section->owner));
1783 warned = TRUE;
1784
1785 return bfd_reloc_undefined;
1786 }
1787
1788 /* Handle a mips16 GP relative reloc. */
1789
1790 static bfd_reloc_status_type
1791 mips16_gprel_reloc (abfd, reloc_entry, symbol, data, input_section,
1792 output_bfd, error_message)
1793 bfd *abfd;
1794 arelent *reloc_entry;
1795 asymbol *symbol;
1796 PTR data;
1797 asection *input_section;
1798 bfd *output_bfd;
1799 char **error_message;
1800 {
1801 bfd_boolean relocateable;
1802 bfd_reloc_status_type ret;
1803 bfd_vma gp;
1804 unsigned short extend, insn;
1805 unsigned long final;
1806
1807 GET_RELOC_ADDEND (output_bfd, symbol, reloc_entry, input_section)
1808
1809 if (output_bfd != NULL)
1810 relocateable = TRUE;
1811 else
1812 {
1813 relocateable = FALSE;
1814 output_bfd = symbol->section->output_section->owner;
1815 }
1816
1817 ret = mips_elf_final_gp (output_bfd, symbol, relocateable, error_message,
1818 &gp);
1819 if (ret != bfd_reloc_ok)
1820 return ret;
1821
1822 if (reloc_entry->address > input_section->_cooked_size)
1823 return bfd_reloc_outofrange;
1824
1825 /* Pick up the mips16 extend instruction and the real instruction. */
1826 extend = bfd_get_16 (abfd, (bfd_byte *) data + reloc_entry->address);
1827 insn = bfd_get_16 (abfd, (bfd_byte *) data + reloc_entry->address + 2);
1828
1829 /* Stuff the current addend back as a 32 bit value, do the usual
1830 relocation, and then clean up. */
1831 bfd_put_32 (abfd,
1832 (bfd_vma) (((extend & 0x1f) << 11)
1833 | (extend & 0x7e0)
1834 | (insn & 0x1f)),
1835 (bfd_byte *) data + reloc_entry->address);
1836
1837 ret = _bfd_mips_elf_gprel16_with_gp (abfd, symbol, reloc_entry,
1838 input_section, relocateable, data, gp);
1839
1840 final = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
1841 bfd_put_16 (abfd,
1842 (bfd_vma) ((extend & 0xf800)
1843 | ((final >> 11) & 0x1f)
1844 | (final & 0x7e0)),
1845 (bfd_byte *) data + reloc_entry->address);
1846 bfd_put_16 (abfd,
1847 (bfd_vma) ((insn & 0xffe0)
1848 | (final & 0x1f)),
1849 (bfd_byte *) data + reloc_entry->address + 2);
1850
1851 return ret;
1852 }
1853
1854 #undef GET_RELOC_ADDEND
1855 #undef SET_RELOC_ADDEND
1856 \f
1857 /* A mapping from BFD reloc types to MIPS ELF reloc types. */
1858
1859 struct elf_reloc_map {
1860 bfd_reloc_code_real_type bfd_val;
1861 enum elf_mips_reloc_type elf_val;
1862 };
1863
1864 static const struct elf_reloc_map mips_reloc_map[] =
1865 {
1866 { BFD_RELOC_NONE, R_MIPS_NONE },
1867 { BFD_RELOC_16, R_MIPS_16 },
1868 { BFD_RELOC_32, R_MIPS_32 },
1869 /* There is no BFD reloc for R_MIPS_REL32. */
1870 { BFD_RELOC_CTOR, R_MIPS_32 },
1871 { BFD_RELOC_64, R_MIPS_64 },
1872 { BFD_RELOC_16_PCREL, R_MIPS_PC16 },
1873 { BFD_RELOC_HI16_S, R_MIPS_HI16 },
1874 { BFD_RELOC_LO16, R_MIPS_LO16 },
1875 { BFD_RELOC_GPREL16, R_MIPS_GPREL16 },
1876 { BFD_RELOC_GPREL32, R_MIPS_GPREL32 },
1877 { BFD_RELOC_MIPS_JMP, R_MIPS_26 },
1878 { BFD_RELOC_MIPS_LITERAL, R_MIPS_LITERAL },
1879 { BFD_RELOC_MIPS_GOT16, R_MIPS_GOT16 },
1880 { BFD_RELOC_MIPS_CALL16, R_MIPS_CALL16 },
1881 { BFD_RELOC_MIPS_SHIFT5, R_MIPS_SHIFT5 },
1882 { BFD_RELOC_MIPS_SHIFT6, R_MIPS_SHIFT6 },
1883 { BFD_RELOC_MIPS_GOT_DISP, R_MIPS_GOT_DISP },
1884 { BFD_RELOC_MIPS_GOT_PAGE, R_MIPS_GOT_PAGE },
1885 { BFD_RELOC_MIPS_GOT_OFST, R_MIPS_GOT_OFST },
1886 { BFD_RELOC_MIPS_GOT_HI16, R_MIPS_GOT_HI16 },
1887 { BFD_RELOC_MIPS_GOT_LO16, R_MIPS_GOT_LO16 },
1888 { BFD_RELOC_MIPS_SUB, R_MIPS_SUB },
1889 { BFD_RELOC_MIPS_INSERT_A, R_MIPS_INSERT_A },
1890 { BFD_RELOC_MIPS_INSERT_B, R_MIPS_INSERT_B },
1891 { BFD_RELOC_MIPS_DELETE, R_MIPS_DELETE },
1892 { BFD_RELOC_MIPS_HIGHEST, R_MIPS_HIGHEST },
1893 { BFD_RELOC_MIPS_HIGHER, R_MIPS_HIGHER },
1894 { BFD_RELOC_MIPS_CALL_HI16, R_MIPS_CALL_HI16 },
1895 { BFD_RELOC_MIPS_CALL_LO16, R_MIPS_CALL_LO16 },
1896 { BFD_RELOC_MIPS_SCN_DISP, R_MIPS_SCN_DISP },
1897 { BFD_RELOC_MIPS_REL16, R_MIPS_REL16 },
1898 /* Use of R_MIPS_ADD_IMMEDIATE and R_MIPS_PJUMP is deprecated. */
1899 { BFD_RELOC_MIPS_RELGOT, R_MIPS_RELGOT },
1900 { BFD_RELOC_MIPS_JALR, R_MIPS_JALR }
1901 };
1902
1903 /* Given a BFD reloc type, return a howto structure. */
1904
1905 static reloc_howto_type *
1906 bfd_elf32_bfd_reloc_type_lookup (abfd, code)
1907 bfd *abfd ATTRIBUTE_UNUSED;
1908 bfd_reloc_code_real_type code;
1909 {
1910 unsigned int i;
1911 /* FIXME: We default to RELA here instead of choosing the right
1912 relocation variant. */
1913 reloc_howto_type *howto_table = elf_mips_howto_table_rela;
1914
1915 for (i = 0; i < sizeof (mips_reloc_map) / sizeof (struct elf_reloc_map);
1916 i++)
1917 {
1918 if (mips_reloc_map[i].bfd_val == code)
1919 return &howto_table[(int) mips_reloc_map[i].elf_val];
1920 }
1921
1922 switch (code)
1923 {
1924 case BFD_RELOC_MIPS16_JMP:
1925 return &elf_mips16_jump_howto;
1926 case BFD_RELOC_MIPS16_GPREL:
1927 return &elf_mips16_gprel_howto;
1928 case BFD_RELOC_VTABLE_INHERIT:
1929 return &elf_mips_gnu_vtinherit_howto;
1930 case BFD_RELOC_VTABLE_ENTRY:
1931 return &elf_mips_gnu_vtentry_howto;
1932 case BFD_RELOC_16_PCREL_S2:
1933 return &elf_mips_gnu_rela16_s2;
1934 default:
1935 bfd_set_error (bfd_error_bad_value);
1936 return NULL;
1937 }
1938 }
1939
1940 /* Given a MIPS Elf_Internal_Rel, fill in an arelent structure. */
1941
1942 static reloc_howto_type *
1943 mips_elf_n32_rtype_to_howto (r_type, rela_p)
1944 unsigned int r_type;
1945 bfd_boolean rela_p;
1946 {
1947 switch (r_type)
1948 {
1949 case R_MIPS16_26:
1950 return &elf_mips16_jump_howto;
1951 case R_MIPS16_GPREL:
1952 return &elf_mips16_gprel_howto;
1953 case R_MIPS_GNU_VTINHERIT:
1954 return &elf_mips_gnu_vtinherit_howto;
1955 case R_MIPS_GNU_VTENTRY:
1956 return &elf_mips_gnu_vtentry_howto;
1957 case R_MIPS_GNU_REL16_S2:
1958 if (rela_p)
1959 return &elf_mips_gnu_rela16_s2;
1960 else
1961 return &elf_mips_gnu_rel16_s2;
1962 default:
1963 BFD_ASSERT (r_type < (unsigned int) R_MIPS_max);
1964 if (rela_p)
1965 return &elf_mips_howto_table_rela[r_type];
1966 else
1967 return &elf_mips_howto_table_rel[r_type];
1968 break;
1969 }
1970 }
1971
1972 /* Given a MIPS Elf_Internal_Rel, fill in an arelent structure. */
1973
1974 static void
1975 mips_info_to_howto_rel (abfd, cache_ptr, dst)
1976 bfd *abfd;
1977 arelent *cache_ptr;
1978 Elf_Internal_Rela *dst;
1979 {
1980 unsigned int r_type;
1981
1982 r_type = ELF32_R_TYPE (dst->r_info);
1983 cache_ptr->howto = mips_elf_n32_rtype_to_howto (r_type, FALSE);
1984
1985 /* The addend for a GPREL16 or LITERAL relocation comes from the GP
1986 value for the object file. We get the addend now, rather than
1987 when we do the relocation, because the symbol manipulations done
1988 by the linker may cause us to lose track of the input BFD. */
1989 if (((*cache_ptr->sym_ptr_ptr)->flags & BSF_SECTION_SYM) != 0
1990 && (r_type == (unsigned int) R_MIPS_GPREL16
1991 || r_type == (unsigned int) R_MIPS_LITERAL))
1992 cache_ptr->addend = elf_gp (abfd);
1993 }
1994
1995 /* Given a MIPS Elf_Internal_Rela, fill in an arelent structure. */
1996
1997 static void
1998 mips_info_to_howto_rela (abfd, cache_ptr, dst)
1999 bfd *abfd ATTRIBUTE_UNUSED;
2000 arelent *cache_ptr;
2001 Elf_Internal_Rela *dst;
2002 {
2003 unsigned int r_type;
2004
2005 r_type = ELF32_R_TYPE (dst->r_info);
2006 cache_ptr->howto = mips_elf_n32_rtype_to_howto (r_type, TRUE);
2007 cache_ptr->addend = dst->r_addend;
2008 }
2009 \f
2010 /* Determine whether a symbol is global for the purposes of splitting
2011 the symbol table into global symbols and local symbols. At least
2012 on Irix 5, this split must be between section symbols and all other
2013 symbols. On most ELF targets the split is between static symbols
2014 and externally visible symbols. */
2015
2016 static bfd_boolean
2017 mips_elf_sym_is_global (abfd, sym)
2018 bfd *abfd ATTRIBUTE_UNUSED;
2019 asymbol *sym;
2020 {
2021 if (SGI_COMPAT (abfd))
2022 return (sym->flags & BSF_SECTION_SYM) == 0;
2023 else
2024 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
2025 || bfd_is_und_section (bfd_get_section (sym))
2026 || bfd_is_com_section (bfd_get_section (sym)));
2027 }
2028 \f
2029 /* Set the right machine number for a MIPS ELF file. */
2030
2031 static bfd_boolean
2032 mips_elf_n32_object_p (abfd)
2033 bfd *abfd;
2034 {
2035 unsigned long mach;
2036
2037 /* Irix 5 and 6 are broken. Object file symbol tables are not always
2038 sorted correctly such that local symbols precede global symbols,
2039 and the sh_info field in the symbol table is not always right. */
2040 if (SGI_COMPAT (abfd))
2041 elf_bad_symtab (abfd) = TRUE;
2042
2043 mach = _bfd_elf_mips_mach (elf_elfheader (abfd)->e_flags);
2044 bfd_default_set_arch_mach (abfd, bfd_arch_mips, mach);
2045
2046 if (! ABI_N32_P(abfd))
2047 return FALSE;
2048
2049 return TRUE;
2050 }
2051 \f
2052 /* Support for core dump NOTE sections. */
2053 static bfd_boolean
2054 elf32_mips_grok_prstatus (abfd, note)
2055 bfd *abfd;
2056 Elf_Internal_Note *note;
2057 {
2058 int offset;
2059 unsigned int raw_size;
2060
2061 switch (note->descsz)
2062 {
2063 default:
2064 return FALSE;
2065
2066 case 440: /* Linux/MIPS N32 */
2067 /* pr_cursig */
2068 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2069
2070 /* pr_pid */
2071 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
2072
2073 /* pr_reg */
2074 offset = 72;
2075 raw_size = 360;
2076
2077 break;
2078 }
2079
2080 /* Make a ".reg/999" section. */
2081 return _bfd_elfcore_make_pseudosection (abfd, ".reg", raw_size,
2082 note->descpos + offset);
2083 }
2084
2085 static bfd_boolean
2086 elf32_mips_grok_psinfo (abfd, note)
2087 bfd *abfd;
2088 Elf_Internal_Note *note;
2089 {
2090 switch (note->descsz)
2091 {
2092 default:
2093 return FALSE;
2094
2095 case 128: /* Linux/MIPS elf_prpsinfo */
2096 elf_tdata (abfd)->core_program
2097 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2098 elf_tdata (abfd)->core_command
2099 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2100 }
2101
2102 /* Note that for some reason, a spurious space is tacked
2103 onto the end of the args in some (at least one anyway)
2104 implementations, so strip it off if it exists. */
2105
2106 {
2107 char *command = elf_tdata (abfd)->core_command;
2108 int n = strlen (command);
2109
2110 if (0 < n && command[n - 1] == ' ')
2111 command[n - 1] = '\0';
2112 }
2113
2114 return TRUE;
2115 }
2116 \f
2117 /* Depending on the target vector we generate some version of Irix
2118 executables or "normal" MIPS ELF ABI executables. */
2119 static irix_compat_t
2120 elf_n32_mips_irix_compat (abfd)
2121 bfd *abfd;
2122 {
2123 if ((abfd->xvec == &bfd_elf32_nbigmips_vec)
2124 || (abfd->xvec == &bfd_elf32_nlittlemips_vec))
2125 return ict_irix6;
2126 else
2127 return ict_none;
2128 }
2129 \f
2130 /* ECOFF swapping routines. These are used when dealing with the
2131 .mdebug section, which is in the ECOFF debugging format. */
2132 static const struct ecoff_debug_swap mips_elf32_ecoff_debug_swap = {
2133 /* Symbol table magic number. */
2134 magicSym,
2135 /* Alignment of debugging information. E.g., 4. */
2136 4,
2137 /* Sizes of external symbolic information. */
2138 sizeof (struct hdr_ext),
2139 sizeof (struct dnr_ext),
2140 sizeof (struct pdr_ext),
2141 sizeof (struct sym_ext),
2142 sizeof (struct opt_ext),
2143 sizeof (struct fdr_ext),
2144 sizeof (struct rfd_ext),
2145 sizeof (struct ext_ext),
2146 /* Functions to swap in external symbolic data. */
2147 ecoff_swap_hdr_in,
2148 ecoff_swap_dnr_in,
2149 ecoff_swap_pdr_in,
2150 ecoff_swap_sym_in,
2151 ecoff_swap_opt_in,
2152 ecoff_swap_fdr_in,
2153 ecoff_swap_rfd_in,
2154 ecoff_swap_ext_in,
2155 _bfd_ecoff_swap_tir_in,
2156 _bfd_ecoff_swap_rndx_in,
2157 /* Functions to swap out external symbolic data. */
2158 ecoff_swap_hdr_out,
2159 ecoff_swap_dnr_out,
2160 ecoff_swap_pdr_out,
2161 ecoff_swap_sym_out,
2162 ecoff_swap_opt_out,
2163 ecoff_swap_fdr_out,
2164 ecoff_swap_rfd_out,
2165 ecoff_swap_ext_out,
2166 _bfd_ecoff_swap_tir_out,
2167 _bfd_ecoff_swap_rndx_out,
2168 /* Function to read in symbolic data. */
2169 _bfd_mips_elf_read_ecoff_info
2170 };
2171 \f
2172 #define ELF_ARCH bfd_arch_mips
2173 #define ELF_MACHINE_CODE EM_MIPS
2174
2175 /* The SVR4 MIPS ABI says that this should be 0x10000, but Irix 5 uses
2176 a value of 0x1000, and we are compatible.
2177 FIXME: How does this affect NewABI? */
2178 #define ELF_MAXPAGESIZE 0x1000
2179
2180 #define elf_backend_collect TRUE
2181 #define elf_backend_type_change_ok TRUE
2182 #define elf_backend_can_gc_sections TRUE
2183 #define elf_info_to_howto mips_info_to_howto_rela
2184 #define elf_info_to_howto_rel mips_info_to_howto_rel
2185 #define elf_backend_sym_is_global mips_elf_sym_is_global
2186 #define elf_backend_object_p mips_elf_n32_object_p
2187 #define elf_backend_symbol_processing _bfd_mips_elf_symbol_processing
2188 #define elf_backend_section_processing _bfd_mips_elf_section_processing
2189 #define elf_backend_section_from_shdr _bfd_mips_elf_section_from_shdr
2190 #define elf_backend_fake_sections _bfd_mips_elf_fake_sections
2191 #define elf_backend_section_from_bfd_section \
2192 _bfd_mips_elf_section_from_bfd_section
2193 #define elf_backend_add_symbol_hook _bfd_mips_elf_add_symbol_hook
2194 #define elf_backend_link_output_symbol_hook \
2195 _bfd_mips_elf_link_output_symbol_hook
2196 #define elf_backend_create_dynamic_sections \
2197 _bfd_mips_elf_create_dynamic_sections
2198 #define elf_backend_check_relocs _bfd_mips_elf_check_relocs
2199 #define elf_backend_adjust_dynamic_symbol \
2200 _bfd_mips_elf_adjust_dynamic_symbol
2201 #define elf_backend_always_size_sections \
2202 _bfd_mips_elf_always_size_sections
2203 #define elf_backend_size_dynamic_sections \
2204 _bfd_mips_elf_size_dynamic_sections
2205 #define elf_backend_relocate_section _bfd_mips_elf_relocate_section
2206 #define elf_backend_finish_dynamic_symbol \
2207 _bfd_mips_elf_finish_dynamic_symbol
2208 #define elf_backend_finish_dynamic_sections \
2209 _bfd_mips_elf_finish_dynamic_sections
2210 #define elf_backend_final_write_processing \
2211 _bfd_mips_elf_final_write_processing
2212 #define elf_backend_additional_program_headers \
2213 _bfd_mips_elf_additional_program_headers
2214 #define elf_backend_modify_segment_map _bfd_mips_elf_modify_segment_map
2215 #define elf_backend_gc_mark_hook _bfd_mips_elf_gc_mark_hook
2216 #define elf_backend_gc_sweep_hook _bfd_mips_elf_gc_sweep_hook
2217 #define elf_backend_copy_indirect_symbol \
2218 _bfd_mips_elf_copy_indirect_symbol
2219 #define elf_backend_hide_symbol _bfd_mips_elf_hide_symbol
2220 #define elf_backend_grok_prstatus elf32_mips_grok_prstatus
2221 #define elf_backend_grok_psinfo elf32_mips_grok_psinfo
2222 #define elf_backend_ecoff_debug_swap &mips_elf32_ecoff_debug_swap
2223
2224 #define elf_backend_got_header_size (4 * MIPS_RESERVED_GOTNO)
2225 #define elf_backend_plt_header_size 0
2226
2227 /* MIPS n32 ELF can use a mixture of REL and RELA, but some Relocations
2228 work better/work only in RELA, so we default to this. */
2229 #define elf_backend_may_use_rel_p 1
2230 #define elf_backend_may_use_rela_p 1
2231 #define elf_backend_default_use_rela_p 1
2232 #define elf_backend_sign_extend_vma TRUE
2233
2234 #define elf_backend_discard_info _bfd_mips_elf_discard_info
2235 #define elf_backend_ignore_discarded_relocs \
2236 _bfd_mips_elf_ignore_discarded_relocs
2237 #define elf_backend_write_section _bfd_mips_elf_write_section
2238 #define elf_backend_mips_irix_compat elf_n32_mips_irix_compat
2239 #define elf_backend_mips_rtype_to_howto mips_elf_n32_rtype_to_howto
2240 #define bfd_elf32_find_nearest_line _bfd_mips_elf_find_nearest_line
2241 #define bfd_elf32_new_section_hook _bfd_mips_elf_new_section_hook
2242 #define bfd_elf32_set_section_contents _bfd_mips_elf_set_section_contents
2243 #define bfd_elf32_bfd_get_relocated_section_contents \
2244 _bfd_elf_mips_get_relocated_section_contents
2245 #define bfd_elf32_bfd_link_hash_table_create \
2246 _bfd_mips_elf_link_hash_table_create
2247 #define bfd_elf32_bfd_final_link _bfd_mips_elf_final_link
2248 #define bfd_elf32_bfd_merge_private_bfd_data \
2249 _bfd_mips_elf_merge_private_bfd_data
2250 #define bfd_elf32_bfd_set_private_flags _bfd_mips_elf_set_private_flags
2251 #define bfd_elf32_bfd_print_private_bfd_data \
2252 _bfd_mips_elf_print_private_bfd_data
2253 #define bfd_elf32_bfd_relax_section _bfd_mips_relax_section
2254
2255 /* Support for SGI-ish mips targets using n32 ABI. */
2256
2257 #define TARGET_LITTLE_SYM bfd_elf32_nlittlemips_vec
2258 #define TARGET_LITTLE_NAME "elf32-nlittlemips"
2259 #define TARGET_BIG_SYM bfd_elf32_nbigmips_vec
2260 #define TARGET_BIG_NAME "elf32-nbigmips"
2261
2262 #include "elf32-target.h"
2263
2264 /* Support for traditional mips targets using n32 ABI. */
2265 #define INCLUDED_TARGET_FILE /* More a type of flag. */
2266
2267 #undef TARGET_LITTLE_SYM
2268 #undef TARGET_LITTLE_NAME
2269 #undef TARGET_BIG_SYM
2270 #undef TARGET_BIG_NAME
2271
2272 #define TARGET_LITTLE_SYM bfd_elf32_ntradlittlemips_vec
2273 #define TARGET_LITTLE_NAME "elf32-ntradlittlemips"
2274 #define TARGET_BIG_SYM bfd_elf32_ntradbigmips_vec
2275 #define TARGET_BIG_NAME "elf32-ntradbigmips"
2276
2277 /* Include the target file again for this target. */
2278 #include "elf32-target.h"