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8a397dad TS |
1 | /* MIPS-specific support for 32-bit ELF |
2 | Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 | |
3 | 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 boolean mips_elf_assign_gp PARAMS ((bfd *, bfd_vma *)); | |
59 | static bfd_reloc_status_type mips_elf_final_gp | |
60 | PARAMS ((bfd *, asymbol *, boolean, char **, bfd_vma *)); | |
61 | static bfd_reloc_status_type mips_elf_gprel16_reloc | |
62 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
63 | static bfd_reloc_status_type mips_elf_literal_reloc | |
64 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
65 | static bfd_reloc_status_type mips_elf_gprel32_reloc | |
66 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
67 | static bfd_reloc_status_type gprel32_with_gp | |
68 | PARAMS ((bfd *, asymbol *, arelent *, asection *, boolean, PTR, bfd_vma)); | |
69 | static bfd_reloc_status_type mips_elf_shift6_reloc | |
70 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
71 | static bfd_reloc_status_type mips16_jump_reloc | |
72 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
73 | static bfd_reloc_status_type mips16_gprel_reloc | |
74 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
75 | static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup | |
76 | PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
77 | static reloc_howto_type *mips_elf_n32_rtype_to_howto | |
78 | PARAMS ((unsigned int, boolean)); | |
79 | static void mips_info_to_howto_rel | |
80 | PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *)); | |
81 | static void mips_info_to_howto_rela | |
82 | PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *)); | |
83 | static boolean mips_elf_sym_is_global PARAMS ((bfd *, asymbol *)); | |
84 | static boolean mips_elf_n32_object_p PARAMS ((bfd *)); | |
85 | static boolean elf32_mips_grok_prstatus | |
86 | PARAMS ((bfd *, Elf_Internal_Note *)); | |
87 | static boolean elf32_mips_grok_psinfo | |
88 | PARAMS ((bfd *, Elf_Internal_Note *)); | |
89 | static irix_compat_t elf_n32_mips_irix_compat | |
90 | PARAMS ((bfd *)); | |
91 | ||
92 | extern const bfd_target bfd_elf32_nbigmips_vec; | |
93 | extern const bfd_target bfd_elf32_nlittlemips_vec; | |
94 | ||
95 | static bfd_vma prev_reloc_address = -1; | |
96 | static bfd_vma prev_reloc_addend = 0; | |
97 | ||
98 | /* Nonzero if ABFD is using the N32 ABI. */ | |
99 | #define ABI_N32_P(abfd) \ | |
100 | ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI2) != 0) | |
101 | ||
102 | /* Whether we are trying to be compatible with IRIX at all. */ | |
103 | #define SGI_COMPAT(abfd) \ | |
104 | (elf_n32_mips_irix_compat (abfd) != ict_none) | |
105 | ||
106 | /* The number of local .got entries we reserve. */ | |
107 | #define MIPS_RESERVED_GOTNO (2) | |
108 | ||
109 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value | |
110 | from smaller values. Start with zero, widen, *then* decrement. */ | |
111 | #define MINUS_ONE (((bfd_vma)0) - 1) | |
112 | ||
113 | /* The relocation table used for SHT_REL sections. */ | |
114 | ||
115 | static reloc_howto_type elf_mips_howto_table_rel[] = | |
116 | { | |
117 | /* No relocation. */ | |
118 | HOWTO (R_MIPS_NONE, /* type */ | |
119 | 0, /* rightshift */ | |
120 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
121 | 0, /* bitsize */ | |
122 | false, /* pc_relative */ | |
123 | 0, /* bitpos */ | |
124 | complain_overflow_dont, /* complain_on_overflow */ | |
125 | mips_elf_generic_reloc, /* special_function */ | |
126 | "R_MIPS_NONE", /* name */ | |
127 | false, /* partial_inplace */ | |
128 | 0, /* src_mask */ | |
129 | 0, /* dst_mask */ | |
130 | false), /* pcrel_offset */ | |
131 | ||
132 | /* 16 bit relocation. */ | |
133 | HOWTO (R_MIPS_16, /* type */ | |
134 | 0, /* rightshift */ | |
135 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
136 | 16, /* bitsize */ | |
137 | false, /* pc_relative */ | |
138 | 0, /* bitpos */ | |
139 | complain_overflow_signed, /* complain_on_overflow */ | |
140 | mips_elf_generic_reloc, /* special_function */ | |
141 | "R_MIPS_16", /* name */ | |
142 | true, /* partial_inplace */ | |
143 | 0x0000ffff, /* src_mask */ | |
144 | 0x0000ffff, /* dst_mask */ | |
145 | false), /* pcrel_offset */ | |
146 | ||
147 | /* 32 bit relocation. */ | |
148 | HOWTO (R_MIPS_32, /* type */ | |
149 | 0, /* rightshift */ | |
150 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
151 | 32, /* bitsize */ | |
152 | false, /* pc_relative */ | |
153 | 0, /* bitpos */ | |
154 | complain_overflow_dont, /* complain_on_overflow */ | |
155 | mips_elf_generic_reloc, /* special_function */ | |
156 | "R_MIPS_32", /* name */ | |
157 | true, /* partial_inplace */ | |
158 | 0xffffffff, /* src_mask */ | |
159 | 0xffffffff, /* dst_mask */ | |
160 | false), /* pcrel_offset */ | |
161 | ||
162 | /* 32 bit symbol relative relocation. */ | |
163 | HOWTO (R_MIPS_REL32, /* type */ | |
164 | 0, /* rightshift */ | |
165 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
166 | 32, /* bitsize */ | |
167 | false, /* pc_relative */ | |
168 | 0, /* bitpos */ | |
169 | complain_overflow_dont, /* complain_on_overflow */ | |
170 | mips_elf_generic_reloc, /* special_function */ | |
171 | "R_MIPS_REL32", /* name */ | |
172 | true, /* partial_inplace */ | |
173 | 0xffffffff, /* src_mask */ | |
174 | 0xffffffff, /* dst_mask */ | |
175 | false), /* pcrel_offset */ | |
176 | ||
177 | /* 26 bit jump address. */ | |
178 | HOWTO (R_MIPS_26, /* type */ | |
179 | 2, /* rightshift */ | |
180 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
181 | 26, /* bitsize */ | |
182 | false, /* pc_relative */ | |
183 | 0, /* bitpos */ | |
184 | complain_overflow_dont, /* complain_on_overflow */ | |
185 | /* This needs complex overflow | |
186 | detection, because the upper four | |
187 | bits must match the PC + 4. */ | |
188 | mips_elf_generic_reloc, /* special_function */ | |
189 | "R_MIPS_26", /* name */ | |
190 | true, /* partial_inplace */ | |
191 | 0x03ffffff, /* src_mask */ | |
192 | 0x03ffffff, /* dst_mask */ | |
193 | false), /* pcrel_offset */ | |
194 | ||
195 | /* R_MIPS_HI16 and R_MIPS_LO16 are unsupported for NewABI REL. | |
196 | However, the native IRIX6 tools use them, so we try our best. */ | |
197 | ||
198 | /* High 16 bits of symbol value. */ | |
199 | HOWTO (R_MIPS_HI16, /* type */ | |
200 | 0, /* rightshift */ | |
201 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
202 | 16, /* bitsize */ | |
203 | false, /* pc_relative */ | |
204 | 0, /* bitpos */ | |
205 | complain_overflow_dont, /* complain_on_overflow */ | |
206 | mips_elf_hi16_reloc, /* special_function */ | |
207 | "R_MIPS_HI16", /* name */ | |
208 | true, /* partial_inplace */ | |
209 | 0x0000ffff, /* src_mask */ | |
210 | 0x0000ffff, /* dst_mask */ | |
211 | false), /* pcrel_offset */ | |
212 | ||
213 | /* Low 16 bits of symbol value. */ | |
214 | HOWTO (R_MIPS_LO16, /* type */ | |
215 | 0, /* rightshift */ | |
216 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
217 | 16, /* bitsize */ | |
218 | false, /* pc_relative */ | |
219 | 0, /* bitpos */ | |
220 | complain_overflow_dont, /* complain_on_overflow */ | |
221 | mips_elf_lo16_reloc, /* special_function */ | |
222 | "R_MIPS_LO16", /* name */ | |
223 | true, /* partial_inplace */ | |
224 | 0x0000ffff, /* src_mask */ | |
225 | 0x0000ffff, /* dst_mask */ | |
226 | false), /* pcrel_offset */ | |
227 | ||
228 | /* GP relative reference. */ | |
229 | HOWTO (R_MIPS_GPREL16, /* type */ | |
230 | 0, /* rightshift */ | |
231 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
232 | 16, /* bitsize */ | |
233 | false, /* pc_relative */ | |
234 | 0, /* bitpos */ | |
235 | complain_overflow_signed, /* complain_on_overflow */ | |
236 | mips_elf_gprel16_reloc, /* special_function */ | |
237 | "R_MIPS_GPREL16", /* name */ | |
238 | true, /* partial_inplace */ | |
239 | 0x0000ffff, /* src_mask */ | |
240 | 0x0000ffff, /* dst_mask */ | |
241 | false), /* pcrel_offset */ | |
242 | ||
243 | /* Reference to literal section. */ | |
244 | HOWTO (R_MIPS_LITERAL, /* type */ | |
245 | 0, /* rightshift */ | |
246 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
247 | 16, /* bitsize */ | |
248 | false, /* pc_relative */ | |
249 | 0, /* bitpos */ | |
250 | complain_overflow_signed, /* complain_on_overflow */ | |
251 | mips_elf_literal_reloc, /* special_function */ | |
252 | "R_MIPS_LITERAL", /* name */ | |
253 | true, /* partial_inplace */ | |
254 | 0x0000ffff, /* src_mask */ | |
255 | 0x0000ffff, /* dst_mask */ | |
256 | false), /* pcrel_offset */ | |
257 | ||
258 | /* Reference to global offset table. */ | |
259 | HOWTO (R_MIPS_GOT16, /* type */ | |
260 | 0, /* rightshift */ | |
261 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
262 | 16, /* bitsize */ | |
263 | false, /* pc_relative */ | |
264 | 0, /* bitpos */ | |
265 | complain_overflow_signed, /* complain_on_overflow */ | |
266 | mips_elf_got16_reloc, /* special_function */ | |
267 | "R_MIPS_GOT16", /* name */ | |
268 | true, /* partial_inplace */ | |
269 | 0x0000ffff, /* src_mask */ | |
270 | 0x0000ffff, /* dst_mask */ | |
271 | false), /* pcrel_offset */ | |
272 | ||
273 | /* 16 bit PC relative reference. */ | |
274 | HOWTO (R_MIPS_PC16, /* type */ | |
275 | 0, /* rightshift */ | |
276 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
277 | 16, /* bitsize */ | |
278 | true, /* pc_relative */ | |
279 | 0, /* bitpos */ | |
280 | complain_overflow_signed, /* complain_on_overflow */ | |
281 | mips_elf_generic_reloc, /* special_function */ | |
282 | "R_MIPS_PC16", /* name */ | |
283 | true, /* partial_inplace */ | |
284 | 0x0000ffff, /* src_mask */ | |
285 | 0x0000ffff, /* dst_mask */ | |
286 | true), /* pcrel_offset */ | |
287 | ||
288 | /* 16 bit call through global offset table. */ | |
289 | HOWTO (R_MIPS_CALL16, /* type */ | |
290 | 0, /* rightshift */ | |
291 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
292 | 16, /* bitsize */ | |
293 | false, /* pc_relative */ | |
294 | 0, /* bitpos */ | |
295 | complain_overflow_signed, /* complain_on_overflow */ | |
296 | mips_elf_generic_reloc, /* special_function */ | |
297 | "R_MIPS_CALL16", /* name */ | |
298 | true, /* partial_inplace */ | |
299 | 0x0000ffff, /* src_mask */ | |
300 | 0x0000ffff, /* dst_mask */ | |
301 | false), /* pcrel_offset */ | |
302 | ||
303 | /* 32 bit GP relative reference. */ | |
304 | HOWTO (R_MIPS_GPREL32, /* type */ | |
305 | 0, /* rightshift */ | |
306 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
307 | 32, /* bitsize */ | |
308 | false, /* pc_relative */ | |
309 | 0, /* bitpos */ | |
310 | complain_overflow_dont, /* complain_on_overflow */ | |
311 | mips_elf_gprel32_reloc, /* special_function */ | |
312 | "R_MIPS_GPREL32", /* name */ | |
313 | true, /* partial_inplace */ | |
314 | 0xffffffff, /* src_mask */ | |
315 | 0xffffffff, /* dst_mask */ | |
316 | false), /* pcrel_offset */ | |
317 | ||
318 | /* The remaining relocs are defined on Irix 5, although they are | |
319 | not defined by the ABI. */ | |
320 | EMPTY_HOWTO (13), | |
321 | EMPTY_HOWTO (14), | |
322 | EMPTY_HOWTO (15), | |
323 | ||
324 | /* A 5 bit shift field. */ | |
325 | HOWTO (R_MIPS_SHIFT5, /* type */ | |
326 | 0, /* rightshift */ | |
327 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
328 | 5, /* bitsize */ | |
329 | false, /* pc_relative */ | |
330 | 6, /* bitpos */ | |
331 | complain_overflow_bitfield, /* complain_on_overflow */ | |
332 | mips_elf_generic_reloc, /* special_function */ | |
333 | "R_MIPS_SHIFT5", /* name */ | |
334 | true, /* partial_inplace */ | |
335 | 0x000007c0, /* src_mask */ | |
336 | 0x000007c0, /* dst_mask */ | |
337 | false), /* pcrel_offset */ | |
338 | ||
339 | /* A 6 bit shift field. */ | |
340 | HOWTO (R_MIPS_SHIFT6, /* type */ | |
341 | 0, /* rightshift */ | |
342 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
343 | 6, /* bitsize */ | |
344 | false, /* pc_relative */ | |
345 | 6, /* bitpos */ | |
346 | complain_overflow_bitfield, /* complain_on_overflow */ | |
347 | mips_elf_shift6_reloc, /* special_function */ | |
348 | "R_MIPS_SHIFT6", /* name */ | |
349 | true, /* partial_inplace */ | |
350 | 0x000007c4, /* src_mask */ | |
351 | 0x000007c4, /* dst_mask */ | |
352 | false), /* pcrel_offset */ | |
353 | ||
354 | /* A 64 bit relocation. */ | |
355 | HOWTO (R_MIPS_64, /* type */ | |
356 | 0, /* rightshift */ | |
357 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
358 | 64, /* bitsize */ | |
359 | false, /* pc_relative */ | |
360 | 0, /* bitpos */ | |
361 | complain_overflow_dont, /* complain_on_overflow */ | |
362 | mips_elf_generic_reloc, /* special_function */ | |
363 | "R_MIPS_64", /* name */ | |
364 | true, /* partial_inplace */ | |
365 | MINUS_ONE, /* src_mask */ | |
366 | MINUS_ONE, /* dst_mask */ | |
367 | false), /* pcrel_offset */ | |
368 | ||
369 | /* Displacement in the global offset table. */ | |
370 | HOWTO (R_MIPS_GOT_DISP, /* type */ | |
371 | 0, /* rightshift */ | |
372 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
373 | 16, /* bitsize */ | |
374 | false, /* pc_relative */ | |
375 | 0, /* bitpos */ | |
376 | complain_overflow_signed, /* complain_on_overflow */ | |
377 | mips_elf_generic_reloc, /* special_function */ | |
378 | "R_MIPS_GOT_DISP", /* name */ | |
379 | true, /* partial_inplace */ | |
380 | 0x0000ffff, /* src_mask */ | |
381 | 0x0000ffff, /* dst_mask */ | |
382 | false), /* pcrel_offset */ | |
383 | ||
384 | /* Displacement to page pointer in the global offset table. */ | |
385 | HOWTO (R_MIPS_GOT_PAGE, /* type */ | |
386 | 0, /* rightshift */ | |
387 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
388 | 16, /* bitsize */ | |
389 | false, /* pc_relative */ | |
390 | 0, /* bitpos */ | |
391 | complain_overflow_signed, /* complain_on_overflow */ | |
392 | mips_elf_generic_reloc, /* special_function */ | |
393 | "R_MIPS_GOT_PAGE", /* name */ | |
394 | true, /* partial_inplace */ | |
395 | 0x0000ffff, /* src_mask */ | |
396 | 0x0000ffff, /* dst_mask */ | |
397 | false), /* pcrel_offset */ | |
398 | ||
399 | /* Offset from page pointer in the global offset table. */ | |
400 | HOWTO (R_MIPS_GOT_OFST, /* type */ | |
401 | 0, /* rightshift */ | |
402 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
403 | 16, /* bitsize */ | |
404 | false, /* pc_relative */ | |
405 | 0, /* bitpos */ | |
406 | complain_overflow_signed, /* complain_on_overflow */ | |
407 | mips_elf_generic_reloc, /* special_function */ | |
408 | "R_MIPS_GOT_OFST", /* name */ | |
409 | true, /* partial_inplace */ | |
410 | 0x0000ffff, /* src_mask */ | |
411 | 0x0000ffff, /* dst_mask */ | |
412 | false), /* pcrel_offset */ | |
413 | ||
414 | /* High 16 bits of displacement in global offset table. */ | |
415 | HOWTO (R_MIPS_GOT_HI16, /* type */ | |
416 | 0, /* rightshift */ | |
417 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
418 | 16, /* bitsize */ | |
419 | false, /* pc_relative */ | |
420 | 0, /* bitpos */ | |
421 | complain_overflow_dont, /* complain_on_overflow */ | |
422 | mips_elf_generic_reloc, /* special_function */ | |
423 | "R_MIPS_GOT_HI16", /* name */ | |
424 | true, /* partial_inplace */ | |
425 | 0x0000ffff, /* src_mask */ | |
426 | 0x0000ffff, /* dst_mask */ | |
427 | false), /* pcrel_offset */ | |
428 | ||
429 | /* Low 16 bits of displacement in global offset table. */ | |
430 | HOWTO (R_MIPS_GOT_LO16, /* type */ | |
431 | 0, /* rightshift */ | |
432 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
433 | 16, /* bitsize */ | |
434 | false, /* pc_relative */ | |
435 | 0, /* bitpos */ | |
436 | complain_overflow_dont, /* complain_on_overflow */ | |
437 | mips_elf_generic_reloc, /* special_function */ | |
438 | "R_MIPS_GOT_LO16", /* name */ | |
439 | true, /* partial_inplace */ | |
440 | 0x0000ffff, /* src_mask */ | |
441 | 0x0000ffff, /* dst_mask */ | |
442 | false), /* pcrel_offset */ | |
443 | ||
444 | /* 64 bit subtraction. */ | |
445 | HOWTO (R_MIPS_SUB, /* type */ | |
446 | 0, /* rightshift */ | |
447 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
448 | 64, /* bitsize */ | |
449 | false, /* pc_relative */ | |
450 | 0, /* bitpos */ | |
451 | complain_overflow_dont, /* complain_on_overflow */ | |
452 | mips_elf_generic_reloc, /* special_function */ | |
453 | "R_MIPS_SUB", /* name */ | |
454 | true, /* partial_inplace */ | |
455 | MINUS_ONE, /* src_mask */ | |
456 | MINUS_ONE, /* dst_mask */ | |
457 | false), /* pcrel_offset */ | |
458 | ||
459 | /* Insert the addend as an instruction. */ | |
460 | /* FIXME: Not handled correctly. */ | |
461 | HOWTO (R_MIPS_INSERT_A, /* type */ | |
462 | 0, /* rightshift */ | |
463 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
464 | 32, /* bitsize */ | |
465 | false, /* pc_relative */ | |
466 | 0, /* bitpos */ | |
467 | complain_overflow_dont, /* complain_on_overflow */ | |
468 | mips_elf_generic_reloc, /* special_function */ | |
469 | "R_MIPS_INSERT_A", /* name */ | |
470 | true, /* partial_inplace */ | |
471 | 0xffffffff, /* src_mask */ | |
472 | 0xffffffff, /* dst_mask */ | |
473 | false), /* pcrel_offset */ | |
474 | ||
475 | /* Insert the addend as an instruction, and change all relocations | |
476 | to refer to the old instruction at the address. */ | |
477 | /* FIXME: Not handled correctly. */ | |
478 | HOWTO (R_MIPS_INSERT_B, /* type */ | |
479 | 0, /* rightshift */ | |
480 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
481 | 32, /* bitsize */ | |
482 | false, /* pc_relative */ | |
483 | 0, /* bitpos */ | |
484 | complain_overflow_dont, /* complain_on_overflow */ | |
485 | mips_elf_generic_reloc, /* special_function */ | |
486 | "R_MIPS_INSERT_B", /* name */ | |
487 | true, /* partial_inplace */ | |
488 | 0xffffffff, /* src_mask */ | |
489 | 0xffffffff, /* dst_mask */ | |
490 | false), /* pcrel_offset */ | |
491 | ||
492 | /* Delete a 32 bit instruction. */ | |
493 | /* FIXME: Not handled correctly. */ | |
494 | HOWTO (R_MIPS_DELETE, /* type */ | |
495 | 0, /* rightshift */ | |
496 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
497 | 32, /* bitsize */ | |
498 | false, /* pc_relative */ | |
499 | 0, /* bitpos */ | |
500 | complain_overflow_dont, /* complain_on_overflow */ | |
501 | mips_elf_generic_reloc, /* special_function */ | |
502 | "R_MIPS_DELETE", /* name */ | |
503 | true, /* partial_inplace */ | |
504 | 0xffffffff, /* src_mask */ | |
505 | 0xffffffff, /* dst_mask */ | |
506 | false), /* pcrel_offset */ | |
507 | ||
508 | /* The MIPS ELF64 ABI Draft wants us to support these for REL relocations. | |
509 | We don't, because | |
510 | a) It means building the addend from a R_MIPS_HIGHEST/R_MIPS_HIGHER/ | |
511 | R_MIPS_HI16/R_MIPS_LO16 sequence with varying ordering, using | |
512 | fallable heuristics. | |
513 | b) No other NEwABI toolchain actually emits such relocations. */ | |
514 | EMPTY_HOWTO (R_MIPS_HIGHER), | |
515 | EMPTY_HOWTO (R_MIPS_HIGHEST), | |
516 | ||
517 | /* High 16 bits of displacement in global offset table. */ | |
518 | HOWTO (R_MIPS_CALL_HI16, /* type */ | |
519 | 0, /* rightshift */ | |
520 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
521 | 16, /* bitsize */ | |
522 | false, /* pc_relative */ | |
523 | 0, /* bitpos */ | |
524 | complain_overflow_dont, /* complain_on_overflow */ | |
525 | mips_elf_generic_reloc, /* special_function */ | |
526 | "R_MIPS_CALL_HI16", /* name */ | |
527 | true, /* partial_inplace */ | |
528 | 0x0000ffff, /* src_mask */ | |
529 | 0x0000ffff, /* dst_mask */ | |
530 | false), /* pcrel_offset */ | |
531 | ||
532 | /* Low 16 bits of displacement in global offset table. */ | |
533 | HOWTO (R_MIPS_CALL_LO16, /* type */ | |
534 | 0, /* rightshift */ | |
535 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
536 | 16, /* bitsize */ | |
537 | false, /* pc_relative */ | |
538 | 0, /* bitpos */ | |
539 | complain_overflow_dont, /* complain_on_overflow */ | |
540 | mips_elf_generic_reloc, /* special_function */ | |
541 | "R_MIPS_CALL_LO16", /* name */ | |
542 | true, /* partial_inplace */ | |
543 | 0x0000ffff, /* src_mask */ | |
544 | 0x0000ffff, /* dst_mask */ | |
545 | false), /* pcrel_offset */ | |
546 | ||
547 | /* Section displacement. */ | |
548 | HOWTO (R_MIPS_SCN_DISP, /* type */ | |
549 | 0, /* rightshift */ | |
550 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
551 | 32, /* bitsize */ | |
552 | false, /* pc_relative */ | |
553 | 0, /* bitpos */ | |
554 | complain_overflow_dont, /* complain_on_overflow */ | |
555 | mips_elf_generic_reloc, /* special_function */ | |
556 | "R_MIPS_SCN_DISP", /* name */ | |
557 | true, /* partial_inplace */ | |
558 | 0xffffffff, /* src_mask */ | |
559 | 0xffffffff, /* dst_mask */ | |
560 | false), /* pcrel_offset */ | |
561 | ||
562 | HOWTO (R_MIPS_REL16, /* type */ | |
563 | 0, /* rightshift */ | |
564 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
565 | 16, /* bitsize */ | |
566 | false, /* pc_relative */ | |
567 | 0, /* bitpos */ | |
568 | complain_overflow_signed, /* complain_on_overflow */ | |
569 | mips_elf_generic_reloc, /* special_function */ | |
570 | "R_MIPS_REL16", /* name */ | |
571 | true, /* partial_inplace */ | |
572 | 0xffff, /* src_mask */ | |
573 | 0xffff, /* dst_mask */ | |
574 | false), /* pcrel_offset */ | |
575 | ||
576 | /* These two are obsolete. */ | |
577 | EMPTY_HOWTO (R_MIPS_ADD_IMMEDIATE), | |
578 | EMPTY_HOWTO (R_MIPS_PJUMP), | |
579 | ||
580 | /* Similiar to R_MIPS_REL32, but used for relocations in a GOT section. | |
581 | It must be used for multigot GOT's (and only there). */ | |
582 | HOWTO (R_MIPS_RELGOT, /* type */ | |
583 | 0, /* rightshift */ | |
584 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
585 | 32, /* bitsize */ | |
586 | false, /* pc_relative */ | |
587 | 0, /* bitpos */ | |
588 | complain_overflow_dont, /* complain_on_overflow */ | |
589 | mips_elf_generic_reloc, /* special_function */ | |
590 | "R_MIPS_RELGOT", /* name */ | |
591 | true, /* partial_inplace */ | |
592 | 0xffffffff, /* src_mask */ | |
593 | 0xffffffff, /* dst_mask */ | |
594 | false), /* pcrel_offset */ | |
595 | ||
596 | /* Protected jump conversion. This is an optimization hint. No | |
597 | relocation is required for correctness. */ | |
598 | HOWTO (R_MIPS_JALR, /* type */ | |
599 | 0, /* rightshift */ | |
600 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
601 | 32, /* bitsize */ | |
602 | false, /* pc_relative */ | |
603 | 0, /* bitpos */ | |
604 | complain_overflow_dont, /* complain_on_overflow */ | |
605 | mips_elf_generic_reloc, /* special_function */ | |
606 | "R_MIPS_JALR", /* name */ | |
607 | false, /* partial_inplace */ | |
608 | 0x00000000, /* src_mask */ | |
609 | 0x00000000, /* dst_mask */ | |
610 | false), /* pcrel_offset */ | |
611 | }; | |
612 | ||
613 | /* The relocation table used for SHT_RELA sections. */ | |
614 | ||
615 | static reloc_howto_type elf_mips_howto_table_rela[] = | |
616 | { | |
617 | /* No relocation. */ | |
618 | HOWTO (R_MIPS_NONE, /* type */ | |
619 | 0, /* rightshift */ | |
620 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
621 | 0, /* bitsize */ | |
622 | false, /* pc_relative */ | |
623 | 0, /* bitpos */ | |
624 | complain_overflow_dont, /* complain_on_overflow */ | |
625 | mips_elf_generic_reloc, /* special_function */ | |
626 | "R_MIPS_NONE", /* name */ | |
627 | false, /* partial_inplace */ | |
628 | 0, /* src_mask */ | |
629 | 0, /* dst_mask */ | |
630 | false), /* pcrel_offset */ | |
631 | ||
632 | /* 16 bit relocation. */ | |
633 | HOWTO (R_MIPS_16, /* type */ | |
634 | 0, /* rightshift */ | |
635 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
636 | 16, /* bitsize */ | |
637 | false, /* pc_relative */ | |
638 | 0, /* bitpos */ | |
639 | complain_overflow_signed, /* complain_on_overflow */ | |
640 | mips_elf_generic_reloc, /* special_function */ | |
641 | "R_MIPS_16", /* name */ | |
642 | false, /* partial_inplace */ | |
643 | 0, /* src_mask */ | |
644 | 0x0000, /* dst_mask */ | |
645 | false), /* pcrel_offset */ | |
646 | ||
647 | /* 32 bit relocation. */ | |
648 | HOWTO (R_MIPS_32, /* type */ | |
649 | 0, /* rightshift */ | |
650 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
651 | 32, /* bitsize */ | |
652 | false, /* pc_relative */ | |
653 | 0, /* bitpos */ | |
654 | complain_overflow_dont, /* complain_on_overflow */ | |
655 | mips_elf_generic_reloc, /* special_function */ | |
656 | "R_MIPS_32", /* name */ | |
657 | false, /* partial_inplace */ | |
658 | 0, /* src_mask */ | |
659 | 0xffffffff, /* dst_mask */ | |
660 | false), /* pcrel_offset */ | |
661 | ||
662 | /* 32 bit symbol relative relocation. */ | |
663 | HOWTO (R_MIPS_REL32, /* type */ | |
664 | 0, /* rightshift */ | |
665 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
666 | 32, /* bitsize */ | |
667 | false, /* pc_relative */ | |
668 | 0, /* bitpos */ | |
669 | complain_overflow_dont, /* complain_on_overflow */ | |
670 | mips_elf_generic_reloc, /* special_function */ | |
671 | "R_MIPS_REL32", /* name */ | |
672 | false, /* partial_inplace */ | |
673 | 0, /* src_mask */ | |
674 | 0xffffffff, /* dst_mask */ | |
675 | false), /* pcrel_offset */ | |
676 | ||
677 | /* 26 bit jump address. */ | |
678 | HOWTO (R_MIPS_26, /* type */ | |
679 | 2, /* rightshift */ | |
680 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
681 | 26, /* bitsize */ | |
682 | false, /* pc_relative */ | |
683 | 0, /* bitpos */ | |
684 | complain_overflow_dont, /* complain_on_overflow */ | |
685 | /* This needs complex overflow | |
686 | detection, because the upper 36 | |
687 | bits must match the PC + 4. */ | |
688 | mips_elf_generic_reloc, /* special_function */ | |
689 | "R_MIPS_26", /* name */ | |
690 | false, /* partial_inplace */ | |
691 | 0, /* src_mask */ | |
692 | 0x03ffffff, /* dst_mask */ | |
693 | false), /* pcrel_offset */ | |
694 | ||
695 | /* High 16 bits of symbol value. */ | |
696 | HOWTO (R_MIPS_HI16, /* type */ | |
697 | 0, /* rightshift */ | |
698 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
699 | 16, /* bitsize */ | |
700 | false, /* pc_relative */ | |
701 | 0, /* bitpos */ | |
702 | complain_overflow_dont, /* complain_on_overflow */ | |
703 | mips_elf_generic_reloc, /* special_function */ | |
704 | "R_MIPS_HI16", /* name */ | |
705 | false, /* partial_inplace */ | |
706 | 0, /* src_mask */ | |
707 | 0x0000ffff, /* dst_mask */ | |
708 | false), /* pcrel_offset */ | |
709 | ||
710 | /* Low 16 bits of symbol value. */ | |
711 | HOWTO (R_MIPS_LO16, /* type */ | |
712 | 0, /* rightshift */ | |
713 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
714 | 16, /* bitsize */ | |
715 | false, /* pc_relative */ | |
716 | 0, /* bitpos */ | |
717 | complain_overflow_dont, /* complain_on_overflow */ | |
718 | mips_elf_generic_reloc, /* special_function */ | |
719 | "R_MIPS_LO16", /* name */ | |
720 | false, /* partial_inplace */ | |
721 | 0, /* src_mask */ | |
722 | 0x0000ffff, /* dst_mask */ | |
723 | false), /* pcrel_offset */ | |
724 | ||
725 | /* GP relative reference. */ | |
726 | HOWTO (R_MIPS_GPREL16, /* type */ | |
727 | 0, /* rightshift */ | |
728 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
729 | 16, /* bitsize */ | |
730 | false, /* pc_relative */ | |
731 | 0, /* bitpos */ | |
732 | complain_overflow_signed, /* complain_on_overflow */ | |
733 | mips_elf_gprel16_reloc, /* special_function */ | |
734 | "R_MIPS_GPREL16", /* name */ | |
735 | false, /* partial_inplace */ | |
736 | 0, /* src_mask */ | |
737 | 0x0000ffff, /* dst_mask */ | |
738 | false), /* pcrel_offset */ | |
739 | ||
740 | /* Reference to literal section. */ | |
741 | HOWTO (R_MIPS_LITERAL, /* type */ | |
742 | 0, /* rightshift */ | |
743 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
744 | 16, /* bitsize */ | |
745 | false, /* pc_relative */ | |
746 | 0, /* bitpos */ | |
747 | complain_overflow_signed, /* complain_on_overflow */ | |
748 | mips_elf_literal_reloc, /* special_function */ | |
749 | "R_MIPS_LITERAL", /* name */ | |
750 | false, /* partial_inplace */ | |
751 | 0, /* src_mask */ | |
752 | 0x0000ffff, /* dst_mask */ | |
753 | false), /* pcrel_offset */ | |
754 | ||
755 | /* Reference to global offset table. */ | |
756 | HOWTO (R_MIPS_GOT16, /* type */ | |
757 | 0, /* rightshift */ | |
758 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
759 | 16, /* bitsize */ | |
760 | false, /* pc_relative */ | |
761 | 0, /* bitpos */ | |
762 | complain_overflow_signed, /* complain_on_overflow */ | |
763 | mips_elf_got16_reloc, /* special_function */ | |
764 | "R_MIPS_GOT16", /* name */ | |
765 | false, /* partial_inplace */ | |
766 | 0, /* src_mask */ | |
767 | 0x0000ffff, /* dst_mask */ | |
768 | false), /* pcrel_offset */ | |
769 | ||
770 | /* 16 bit PC relative reference. */ | |
771 | HOWTO (R_MIPS_PC16, /* type */ | |
772 | 0, /* rightshift */ | |
773 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
774 | 16, /* bitsize */ | |
775 | true, /* pc_relative */ | |
776 | 0, /* bitpos */ | |
777 | complain_overflow_signed, /* complain_on_overflow */ | |
778 | mips_elf_generic_reloc, /* special_function */ | |
779 | "R_MIPS_PC16", /* name */ | |
780 | false, /* partial_inplace */ | |
781 | 0, /* src_mask */ | |
782 | 0x0000ffff, /* dst_mask */ | |
783 | true), /* pcrel_offset */ | |
784 | ||
785 | /* 16 bit call through global offset table. */ | |
786 | HOWTO (R_MIPS_CALL16, /* type */ | |
787 | 0, /* rightshift */ | |
788 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
789 | 16, /* bitsize */ | |
790 | false, /* pc_relative */ | |
791 | 0, /* bitpos */ | |
792 | complain_overflow_signed, /* complain_on_overflow */ | |
793 | mips_elf_generic_reloc, /* special_function */ | |
794 | "R_MIPS_CALL16", /* name */ | |
795 | false, /* partial_inplace */ | |
796 | 0, /* src_mask */ | |
797 | 0x0000ffff, /* dst_mask */ | |
798 | false), /* pcrel_offset */ | |
799 | ||
800 | /* 32 bit GP relative reference. */ | |
801 | HOWTO (R_MIPS_GPREL32, /* type */ | |
802 | 0, /* rightshift */ | |
803 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
804 | 32, /* bitsize */ | |
805 | false, /* pc_relative */ | |
806 | 0, /* bitpos */ | |
807 | complain_overflow_dont, /* complain_on_overflow */ | |
808 | mips_elf_gprel32_reloc, /* special_function */ | |
809 | "R_MIPS_GPREL32", /* name */ | |
810 | false, /* partial_inplace */ | |
811 | 0, /* src_mask */ | |
812 | 0xffffffff, /* dst_mask */ | |
813 | false), /* pcrel_offset */ | |
814 | ||
815 | EMPTY_HOWTO (13), | |
816 | EMPTY_HOWTO (14), | |
817 | EMPTY_HOWTO (15), | |
818 | ||
819 | /* A 5 bit shift field. */ | |
820 | HOWTO (R_MIPS_SHIFT5, /* type */ | |
821 | 0, /* rightshift */ | |
822 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
823 | 5, /* bitsize */ | |
824 | false, /* pc_relative */ | |
825 | 6, /* bitpos */ | |
826 | complain_overflow_bitfield, /* complain_on_overflow */ | |
827 | mips_elf_generic_reloc, /* special_function */ | |
828 | "R_MIPS_SHIFT5", /* name */ | |
829 | false, /* partial_inplace */ | |
830 | 0, /* src_mask */ | |
831 | 0x000007c0, /* dst_mask */ | |
832 | false), /* pcrel_offset */ | |
833 | ||
834 | /* A 6 bit shift field. */ | |
835 | HOWTO (R_MIPS_SHIFT6, /* type */ | |
836 | 0, /* rightshift */ | |
837 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
838 | 6, /* bitsize */ | |
839 | false, /* pc_relative */ | |
840 | 6, /* bitpos */ | |
841 | complain_overflow_bitfield, /* complain_on_overflow */ | |
842 | mips_elf_shift6_reloc, /* special_function */ | |
843 | "R_MIPS_SHIFT6", /* name */ | |
844 | false, /* partial_inplace */ | |
845 | 0, /* src_mask */ | |
846 | 0x000007c4, /* dst_mask */ | |
847 | false), /* pcrel_offset */ | |
848 | ||
849 | /* 64 bit relocation. */ | |
850 | HOWTO (R_MIPS_64, /* type */ | |
851 | 0, /* rightshift */ | |
852 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
853 | 64, /* bitsize */ | |
854 | false, /* pc_relative */ | |
855 | 0, /* bitpos */ | |
856 | complain_overflow_dont, /* complain_on_overflow */ | |
857 | mips_elf_generic_reloc, /* special_function */ | |
858 | "R_MIPS_64", /* name */ | |
859 | false, /* partial_inplace */ | |
860 | 0, /* src_mask */ | |
861 | MINUS_ONE, /* dst_mask */ | |
862 | false), /* pcrel_offset */ | |
863 | ||
864 | /* Displacement in the global offset table. */ | |
865 | HOWTO (R_MIPS_GOT_DISP, /* type */ | |
866 | 0, /* rightshift */ | |
867 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
868 | 16, /* bitsize */ | |
869 | false, /* pc_relative */ | |
870 | 0, /* bitpos */ | |
871 | complain_overflow_signed, /* complain_on_overflow */ | |
872 | mips_elf_generic_reloc, /* special_function */ | |
873 | "R_MIPS_GOT_DISP", /* name */ | |
874 | false, /* partial_inplace */ | |
875 | 0, /* src_mask */ | |
876 | 0x0000ffff, /* dst_mask */ | |
877 | false), /* pcrel_offset */ | |
878 | ||
879 | /* Displacement to page pointer in the global offset table. */ | |
880 | HOWTO (R_MIPS_GOT_PAGE, /* type */ | |
881 | 0, /* rightshift */ | |
882 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
883 | 16, /* bitsize */ | |
884 | false, /* pc_relative */ | |
885 | 0, /* bitpos */ | |
886 | complain_overflow_signed, /* complain_on_overflow */ | |
887 | mips_elf_generic_reloc, /* special_function */ | |
888 | "R_MIPS_GOT_PAGE", /* name */ | |
889 | false, /* partial_inplace */ | |
890 | 0, /* src_mask */ | |
891 | 0x0000ffff, /* dst_mask */ | |
892 | false), /* pcrel_offset */ | |
893 | ||
894 | /* Offset from page pointer in the global offset table. */ | |
895 | HOWTO (R_MIPS_GOT_OFST, /* type */ | |
896 | 0, /* rightshift */ | |
897 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
898 | 16, /* bitsize */ | |
899 | false, /* pc_relative */ | |
900 | 0, /* bitpos */ | |
901 | complain_overflow_signed, /* complain_on_overflow */ | |
902 | mips_elf_generic_reloc, /* special_function */ | |
903 | "R_MIPS_GOT_OFST", /* name */ | |
904 | false, /* partial_inplace */ | |
905 | 0, /* src_mask */ | |
906 | 0x0000ffff, /* dst_mask */ | |
907 | false), /* pcrel_offset */ | |
908 | ||
909 | /* High 16 bits of displacement in global offset table. */ | |
910 | HOWTO (R_MIPS_GOT_HI16, /* type */ | |
911 | 0, /* rightshift */ | |
912 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
913 | 16, /* bitsize */ | |
914 | false, /* pc_relative */ | |
915 | 0, /* bitpos */ | |
916 | complain_overflow_dont, /* complain_on_overflow */ | |
917 | mips_elf_generic_reloc, /* special_function */ | |
918 | "R_MIPS_GOT_HI16", /* name */ | |
919 | false, /* partial_inplace */ | |
920 | 0, /* src_mask */ | |
921 | 0x0000ffff, /* dst_mask */ | |
922 | false), /* pcrel_offset */ | |
923 | ||
924 | /* Low 16 bits of displacement in global offset table. */ | |
925 | HOWTO (R_MIPS_GOT_LO16, /* type */ | |
926 | 0, /* rightshift */ | |
927 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
928 | 16, /* bitsize */ | |
929 | false, /* pc_relative */ | |
930 | 0, /* bitpos */ | |
931 | complain_overflow_dont, /* complain_on_overflow */ | |
932 | mips_elf_generic_reloc, /* special_function */ | |
933 | "R_MIPS_GOT_LO16", /* name */ | |
934 | false, /* partial_inplace */ | |
935 | 0, /* src_mask */ | |
936 | 0x0000ffff, /* dst_mask */ | |
937 | false), /* pcrel_offset */ | |
938 | ||
939 | /* 64 bit substraction. */ | |
940 | HOWTO (R_MIPS_SUB, /* type */ | |
941 | 0, /* rightshift */ | |
942 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
943 | 64, /* bitsize */ | |
944 | false, /* pc_relative */ | |
945 | 0, /* bitpos */ | |
946 | complain_overflow_dont, /* complain_on_overflow */ | |
947 | mips_elf_generic_reloc, /* special_function */ | |
948 | "R_MIPS_SUB", /* name */ | |
949 | false, /* partial_inplace */ | |
950 | 0, /* src_mask */ | |
951 | MINUS_ONE, /* dst_mask */ | |
952 | false), /* pcrel_offset */ | |
953 | ||
954 | /* Insert the addend as an instruction. */ | |
955 | /* FIXME: Not handled correctly. */ | |
956 | HOWTO (R_MIPS_INSERT_A, /* type */ | |
957 | 0, /* rightshift */ | |
958 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
959 | 32, /* bitsize */ | |
960 | false, /* pc_relative */ | |
961 | 0, /* bitpos */ | |
962 | complain_overflow_dont, /* complain_on_overflow */ | |
963 | mips_elf_generic_reloc, /* special_function */ | |
964 | "R_MIPS_INSERT_A", /* name */ | |
965 | false, /* partial_inplace */ | |
966 | 0, /* src_mask */ | |
967 | 0xffffffff, /* dst_mask */ | |
968 | false), /* pcrel_offset */ | |
969 | ||
970 | /* Insert the addend as an instruction, and change all relocations | |
971 | to refer to the old instruction at the address. */ | |
972 | /* FIXME: Not handled correctly. */ | |
973 | HOWTO (R_MIPS_INSERT_B, /* type */ | |
974 | 0, /* rightshift */ | |
975 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
976 | 32, /* bitsize */ | |
977 | false, /* pc_relative */ | |
978 | 0, /* bitpos */ | |
979 | complain_overflow_dont, /* complain_on_overflow */ | |
980 | mips_elf_generic_reloc, /* special_function */ | |
981 | "R_MIPS_INSERT_B", /* name */ | |
982 | false, /* partial_inplace */ | |
983 | 0, /* src_mask */ | |
984 | 0xffffffff, /* dst_mask */ | |
985 | false), /* pcrel_offset */ | |
986 | ||
987 | /* Delete a 32 bit instruction. */ | |
988 | /* FIXME: Not handled correctly. */ | |
989 | HOWTO (R_MIPS_DELETE, /* type */ | |
990 | 0, /* rightshift */ | |
991 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
992 | 32, /* bitsize */ | |
993 | false, /* pc_relative */ | |
994 | 0, /* bitpos */ | |
995 | complain_overflow_dont, /* complain_on_overflow */ | |
996 | mips_elf_generic_reloc, /* special_function */ | |
997 | "R_MIPS_DELETE", /* name */ | |
998 | false, /* partial_inplace */ | |
999 | 0, /* src_mask */ | |
1000 | 0xffffffff, /* dst_mask */ | |
1001 | false), /* pcrel_offset */ | |
1002 | ||
1003 | /* Get the higher value of a 64 bit addend. */ | |
1004 | HOWTO (R_MIPS_HIGHER, /* type */ | |
1005 | 0, /* rightshift */ | |
1006 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1007 | 16, /* bitsize */ | |
1008 | false, /* pc_relative */ | |
1009 | 0, /* bitpos */ | |
1010 | complain_overflow_dont, /* complain_on_overflow */ | |
1011 | mips_elf_generic_reloc, /* special_function */ | |
1012 | "R_MIPS_HIGHER", /* name */ | |
1013 | false, /* partial_inplace */ | |
1014 | 0, /* src_mask */ | |
1015 | 0x0000ffff, /* dst_mask */ | |
1016 | false), /* pcrel_offset */ | |
1017 | ||
1018 | /* Get the highest value of a 64 bit addend. */ | |
1019 | HOWTO (R_MIPS_HIGHEST, /* type */ | |
1020 | 0, /* rightshift */ | |
1021 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1022 | 16, /* bitsize */ | |
1023 | false, /* pc_relative */ | |
1024 | 0, /* bitpos */ | |
1025 | complain_overflow_dont, /* complain_on_overflow */ | |
1026 | mips_elf_generic_reloc, /* special_function */ | |
1027 | "R_MIPS_HIGHEST", /* name */ | |
1028 | false, /* partial_inplace */ | |
1029 | 0, /* src_mask */ | |
1030 | 0x0000ffff, /* dst_mask */ | |
1031 | false), /* pcrel_offset */ | |
1032 | ||
1033 | /* High 16 bits of displacement in global offset table. */ | |
1034 | HOWTO (R_MIPS_CALL_HI16, /* type */ | |
1035 | 0, /* rightshift */ | |
1036 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1037 | 16, /* bitsize */ | |
1038 | false, /* pc_relative */ | |
1039 | 0, /* bitpos */ | |
1040 | complain_overflow_dont, /* complain_on_overflow */ | |
1041 | mips_elf_generic_reloc, /* special_function */ | |
1042 | "R_MIPS_CALL_HI16", /* name */ | |
1043 | false, /* partial_inplace */ | |
1044 | 0, /* src_mask */ | |
1045 | 0x0000ffff, /* dst_mask */ | |
1046 | false), /* pcrel_offset */ | |
1047 | ||
1048 | /* Low 16 bits of displacement in global offset table. */ | |
1049 | HOWTO (R_MIPS_CALL_LO16, /* type */ | |
1050 | 0, /* rightshift */ | |
1051 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1052 | 16, /* bitsize */ | |
1053 | false, /* pc_relative */ | |
1054 | 0, /* bitpos */ | |
1055 | complain_overflow_dont, /* complain_on_overflow */ | |
1056 | mips_elf_generic_reloc, /* special_function */ | |
1057 | "R_MIPS_CALL_LO16", /* name */ | |
1058 | false, /* partial_inplace */ | |
1059 | 0, /* src_mask */ | |
1060 | 0x0000ffff, /* dst_mask */ | |
1061 | false), /* pcrel_offset */ | |
1062 | ||
1063 | /* Section displacement, used by an associated event location section. */ | |
1064 | HOWTO (R_MIPS_SCN_DISP, /* type */ | |
1065 | 0, /* rightshift */ | |
1066 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1067 | 32, /* bitsize */ | |
1068 | false, /* pc_relative */ | |
1069 | 0, /* bitpos */ | |
1070 | complain_overflow_dont, /* complain_on_overflow */ | |
1071 | mips_elf_generic_reloc, /* special_function */ | |
1072 | "R_MIPS_SCN_DISP", /* name */ | |
1073 | false, /* partial_inplace */ | |
1074 | 0, /* src_mask */ | |
1075 | 0xffffffff, /* dst_mask */ | |
1076 | false), /* pcrel_offset */ | |
1077 | ||
1078 | /* 16 bit relocation. */ | |
1079 | HOWTO (R_MIPS_REL16, /* type */ | |
1080 | 0, /* rightshift */ | |
1081 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
1082 | 16, /* bitsize */ | |
1083 | false, /* pc_relative */ | |
1084 | 0, /* bitpos */ | |
1085 | complain_overflow_signed, /* complain_on_overflow */ | |
1086 | mips_elf_generic_reloc, /* special_function */ | |
1087 | "R_MIPS_REL16", /* name */ | |
1088 | false, /* partial_inplace */ | |
1089 | 0, /* src_mask */ | |
1090 | 0xffff, /* dst_mask */ | |
1091 | false), /* pcrel_offset */ | |
1092 | ||
1093 | /* These two are obsolete. */ | |
1094 | EMPTY_HOWTO (R_MIPS_ADD_IMMEDIATE), | |
1095 | EMPTY_HOWTO (R_MIPS_PJUMP), | |
1096 | ||
1097 | /* Similiar to R_MIPS_REL32, but used for relocations in a GOT section. | |
1098 | It must be used for multigot GOT's (and only there). */ | |
1099 | HOWTO (R_MIPS_RELGOT, /* type */ | |
1100 | 0, /* rightshift */ | |
1101 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1102 | 32, /* bitsize */ | |
1103 | false, /* pc_relative */ | |
1104 | 0, /* bitpos */ | |
1105 | complain_overflow_dont, /* complain_on_overflow */ | |
1106 | mips_elf_generic_reloc, /* special_function */ | |
1107 | "R_MIPS_RELGOT", /* name */ | |
1108 | false, /* partial_inplace */ | |
1109 | 0, /* src_mask */ | |
1110 | 0xffffffff, /* dst_mask */ | |
1111 | false), /* pcrel_offset */ | |
1112 | ||
1113 | /* Protected jump conversion. This is an optimization hint. No | |
1114 | relocation is required for correctness. */ | |
1115 | HOWTO (R_MIPS_JALR, /* type */ | |
1116 | 0, /* rightshift */ | |
1117 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1118 | 32, /* bitsize */ | |
1119 | false, /* pc_relative */ | |
1120 | 0, /* bitpos */ | |
1121 | complain_overflow_dont, /* complain_on_overflow */ | |
1122 | mips_elf_generic_reloc, /* special_function */ | |
1123 | "R_MIPS_JALR", /* name */ | |
1124 | false, /* partial_inplace */ | |
1125 | 0, /* src_mask */ | |
1126 | 0xffffffff, /* dst_mask */ | |
1127 | false), /* pcrel_offset */ | |
1128 | }; | |
1129 | ||
1130 | /* The reloc used for the mips16 jump instruction. */ | |
1131 | static reloc_howto_type elf_mips16_jump_howto = | |
1132 | HOWTO (R_MIPS16_26, /* type */ | |
1133 | 2, /* rightshift */ | |
1134 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1135 | 26, /* bitsize */ | |
1136 | false, /* pc_relative */ | |
1137 | 0, /* bitpos */ | |
1138 | complain_overflow_dont, /* complain_on_overflow */ | |
1139 | /* This needs complex overflow | |
1140 | detection, because the upper four | |
1141 | bits must match the PC. */ | |
1142 | mips16_jump_reloc, /* special_function */ | |
1143 | "R_MIPS16_26", /* name */ | |
1144 | true, /* partial_inplace */ | |
1145 | 0x3ffffff, /* src_mask */ | |
1146 | 0x3ffffff, /* dst_mask */ | |
1147 | false); /* pcrel_offset */ | |
1148 | ||
1149 | /* The reloc used for the mips16 gprel instruction. */ | |
1150 | static reloc_howto_type elf_mips16_gprel_howto = | |
1151 | HOWTO (R_MIPS16_GPREL, /* type */ | |
1152 | 0, /* rightshift */ | |
1153 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1154 | 16, /* bitsize */ | |
1155 | false, /* pc_relative */ | |
1156 | 0, /* bitpos */ | |
1157 | complain_overflow_signed, /* complain_on_overflow */ | |
1158 | mips16_gprel_reloc, /* special_function */ | |
1159 | "R_MIPS16_GPREL", /* name */ | |
1160 | true, /* partial_inplace */ | |
1161 | 0x07ff001f, /* src_mask */ | |
1162 | 0x07ff001f, /* dst_mask */ | |
1163 | false); /* pcrel_offset */ | |
1164 | ||
1165 | /* GNU extension to record C++ vtable hierarchy */ | |
1166 | static reloc_howto_type elf_mips_gnu_vtinherit_howto = | |
1167 | HOWTO (R_MIPS_GNU_VTINHERIT, /* type */ | |
1168 | 0, /* rightshift */ | |
1169 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1170 | 0, /* bitsize */ | |
1171 | false, /* pc_relative */ | |
1172 | 0, /* bitpos */ | |
1173 | complain_overflow_dont, /* complain_on_overflow */ | |
1174 | NULL, /* special_function */ | |
1175 | "R_MIPS_GNU_VTINHERIT", /* name */ | |
1176 | false, /* partial_inplace */ | |
1177 | 0, /* src_mask */ | |
1178 | 0, /* dst_mask */ | |
1179 | false); /* pcrel_offset */ | |
1180 | ||
1181 | /* GNU extension to record C++ vtable member usage */ | |
1182 | static reloc_howto_type elf_mips_gnu_vtentry_howto = | |
1183 | HOWTO (R_MIPS_GNU_VTENTRY, /* type */ | |
1184 | 0, /* rightshift */ | |
1185 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
1186 | 0, /* bitsize */ | |
1187 | false, /* pc_relative */ | |
1188 | 0, /* bitpos */ | |
1189 | complain_overflow_dont, /* complain_on_overflow */ | |
1190 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
1191 | "R_MIPS_GNU_VTENTRY", /* name */ | |
1192 | false, /* partial_inplace */ | |
1193 | 0, /* src_mask */ | |
1194 | 0, /* dst_mask */ | |
1195 | false); /* pcrel_offset */ | |
1196 | \f | |
1197 | /* This is derived from bfd_elf_generic_reloc. NewABI allows us to have | |
1198 | several relocations against the same address. The addend is derived | |
1199 | from the addends of preceding relocations. If we don't need to | |
1200 | do something special, we simply keep track of the addend. */ | |
1201 | ||
1202 | #define GET_RELOC_ADDEND(obfd, sym, entry, sec) \ | |
1203 | { \ | |
1204 | /* If we're relocating, and this is an external symbol, we don't \ | |
1205 | want to change anything. */ \ | |
1206 | if (obfd != (bfd *) NULL \ | |
1207 | && (sym->flags & BSF_SECTION_SYM) == 0 \ | |
1208 | && (! entry->howto->partial_inplace \ | |
1209 | || entry->addend == 0)) \ | |
1210 | { \ | |
1211 | entry->address += sec->output_offset; \ | |
1212 | return bfd_reloc_ok; \ | |
1213 | } \ | |
1214 | \ | |
1215 | /* The addend of combined relocs is remembered and left for \ | |
1216 | subsequent relocs. */ \ | |
1217 | if (prev_reloc_address != reloc_entry->address) \ | |
1218 | { \ | |
1219 | prev_reloc_address = reloc_entry->address; \ | |
1220 | prev_reloc_addend = reloc_entry->addend; \ | |
1221 | } \ | |
1222 | else \ | |
1223 | reloc_entry->addend = prev_reloc_addend; \ | |
1224 | } | |
1225 | ||
1226 | #define SET_RELOC_ADDEND(entry) \ | |
1227 | { \ | |
1228 | prev_reloc_addend = entry->addend; \ | |
1229 | } | |
1230 | ||
1231 | static bfd_reloc_status_type | |
1232 | mips_elf_generic_reloc (abfd, reloc_entry, symbol, data, input_section, | |
1233 | output_bfd, error_message) | |
1234 | bfd *abfd ATTRIBUTE_UNUSED; | |
1235 | arelent *reloc_entry; | |
1236 | asymbol *symbol; | |
1237 | PTR data ATTRIBUTE_UNUSED; | |
1238 | asection *input_section; | |
1239 | bfd *output_bfd; | |
1240 | char **error_message ATTRIBUTE_UNUSED; | |
1241 | { | |
1242 | GET_RELOC_ADDEND (output_bfd, symbol, reloc_entry, input_section) | |
1243 | ||
1244 | return bfd_reloc_continue; | |
1245 | } | |
1246 | \f | |
1247 | /* Do a R_MIPS_HI16 relocation. This has to be done in combination | |
1248 | with a R_MIPS_LO16 reloc, because there is a carry from the LO16 to | |
1249 | the HI16. Here we just save the information we need; we do the | |
1250 | actual relocation when we see the LO16. | |
1251 | ||
1252 | MIPS ELF requires that the LO16 immediately follow the HI16. As a | |
1253 | GNU extension, for non-pc-relative relocations, we permit an | |
1254 | arbitrary number of HI16 relocs to be associated with a single LO16 | |
1255 | reloc. This extension permits gcc to output the HI and LO relocs | |
1256 | itself. | |
1257 | ||
1258 | This cannot be done for PC-relative relocations because both the HI16 | |
1259 | and LO16 parts of the relocations must be done relative to the LO16 | |
1260 | part, and there can be carry to or borrow from the HI16 part. */ | |
1261 | ||
1262 | struct mips_hi16 | |
1263 | { | |
1264 | struct mips_hi16 *next; | |
1265 | bfd_byte *addr; | |
1266 | bfd_vma addend; | |
1267 | }; | |
1268 | ||
1269 | /* FIXME: This should not be a static variable. */ | |
1270 | ||
1271 | static struct mips_hi16 *mips_hi16_list; | |
1272 | ||
1273 | static bfd_reloc_status_type | |
1274 | mips_elf_hi16_reloc (abfd, reloc_entry, symbol, data, input_section, | |
1275 | output_bfd, error_message) | |
1276 | bfd *abfd ATTRIBUTE_UNUSED; | |
1277 | arelent *reloc_entry; | |
1278 | asymbol *symbol; | |
1279 | PTR data; | |
1280 | asection *input_section; | |
1281 | bfd *output_bfd; | |
1282 | char **error_message ATTRIBUTE_UNUSED; | |
1283 | { | |
1284 | bfd_reloc_status_type ret; | |
1285 | bfd_vma relocation; | |
1286 | struct mips_hi16 *n; | |
1287 | ||
1288 | GET_RELOC_ADDEND (output_bfd, symbol, reloc_entry, input_section) | |
1289 | ||
1290 | ret = bfd_reloc_ok; | |
1291 | ||
1292 | if (bfd_is_und_section (symbol->section) && output_bfd == (bfd *) NULL) | |
1293 | ret = bfd_reloc_undefined; | |
1294 | ||
1295 | if (bfd_is_com_section (symbol->section)) | |
1296 | relocation = 0; | |
1297 | else | |
1298 | relocation = symbol->value; | |
1299 | ||
1300 | relocation += symbol->section->output_section->vma; | |
1301 | relocation += symbol->section->output_offset; | |
1302 | relocation += reloc_entry->addend; | |
1303 | ||
1304 | if (reloc_entry->address > input_section->_cooked_size) | |
1305 | return bfd_reloc_outofrange; | |
1306 | ||
1307 | /* Save the information, and let LO16 do the actual relocation. */ | |
1308 | n = (struct mips_hi16 *) bfd_malloc ((bfd_size_type) sizeof *n); | |
1309 | if (n == NULL) | |
1310 | return bfd_reloc_outofrange; | |
1311 | n->addr = (bfd_byte *) data + reloc_entry->address; | |
1312 | n->addend = relocation; | |
1313 | n->next = mips_hi16_list; | |
1314 | mips_hi16_list = n; | |
1315 | ||
1316 | if (output_bfd != (bfd *) NULL) | |
1317 | reloc_entry->address += input_section->output_offset; | |
1318 | ||
1319 | return ret; | |
1320 | } | |
1321 | ||
1322 | /* Do a R_MIPS_LO16 relocation. This is a straightforward 16 bit | |
1323 | inplace relocation; this function exists in order to do the | |
1324 | R_MIPS_HI16 relocation described above. */ | |
1325 | ||
1326 | static bfd_reloc_status_type | |
1327 | mips_elf_lo16_reloc (abfd, reloc_entry, symbol, data, input_section, | |
1328 | output_bfd, error_message) | |
1329 | bfd *abfd; | |
1330 | arelent *reloc_entry; | |
1331 | asymbol *symbol; | |
1332 | PTR data; | |
1333 | asection *input_section; | |
1334 | bfd *output_bfd; | |
1335 | char **error_message; | |
1336 | { | |
1337 | if (mips_hi16_list != NULL) | |
1338 | { | |
1339 | struct mips_hi16 *l; | |
1340 | ||
1341 | l = mips_hi16_list; | |
1342 | while (l != NULL) | |
1343 | { | |
1344 | unsigned long insn; | |
1345 | unsigned long val; | |
1346 | unsigned long vallo; | |
1347 | struct mips_hi16 *next; | |
1348 | ||
1349 | /* Do the HI16 relocation. Note that we actually don't need | |
1350 | to know anything about the LO16 itself, except where to | |
1351 | find the low 16 bits of the addend needed by the LO16. */ | |
1352 | insn = bfd_get_32 (abfd, l->addr); | |
1353 | vallo = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); | |
1354 | ||
1355 | /* The low order 16 bits are always treated as a signed | |
1356 | value. */ | |
1357 | vallo = ((vallo & 0xffff) ^ 0x8000) - 0x8000; | |
1358 | val = ((insn & 0xffff) << 16) + vallo; | |
1359 | val += l->addend; | |
1360 | ||
1361 | /* If PC-relative, we need to subtract out the address of the LO | |
1362 | half of the HI/LO. (The actual relocation is relative | |
1363 | to that instruction.) */ | |
1364 | if (reloc_entry->howto->pc_relative) | |
1365 | val -= reloc_entry->address; | |
1366 | ||
1367 | /* At this point, "val" has the value of the combined HI/LO | |
1368 | pair. If the low order 16 bits (which will be used for | |
1369 | the LO16 insn) are negative, then we will need an | |
1370 | adjustment for the high order 16 bits. */ | |
1371 | val += 0x8000; | |
1372 | val = (val >> 16) & 0xffff; | |
1373 | ||
1374 | insn &= ~ (bfd_vma) 0xffff; | |
1375 | insn |= val; | |
1376 | bfd_put_32 (abfd, (bfd_vma) insn, l->addr); | |
1377 | ||
1378 | next = l->next; | |
1379 | free (l); | |
1380 | l = next; | |
1381 | } | |
1382 | ||
1383 | mips_hi16_list = NULL; | |
1384 | } | |
1385 | ||
1386 | /* Now do the LO16 reloc in the usual way. */ | |
1387 | return mips_elf_generic_reloc (abfd, reloc_entry, symbol, data, | |
1388 | input_section, output_bfd, error_message); | |
1389 | } | |
1390 | ||
1391 | /* Do a R_MIPS_GOT16 reloc. This is a reloc against the global offset | |
1392 | table used for PIC code. If the symbol is an external symbol, the | |
1393 | instruction is modified to contain the offset of the appropriate | |
1394 | entry in the global offset table. If the symbol is a section | |
1395 | symbol, the next reloc is a R_MIPS_LO16 reloc. The two 16 bit | |
1396 | addends are combined to form the real addend against the section | |
1397 | symbol; the GOT16 is modified to contain the offset of an entry in | |
1398 | the global offset table, and the LO16 is modified to offset it | |
1399 | appropriately. Thus an offset larger than 16 bits requires a | |
1400 | modified value in the global offset table. | |
1401 | ||
1402 | This implementation suffices for the assembler, but the linker does | |
1403 | not yet know how to create global offset tables. */ | |
1404 | ||
1405 | static bfd_reloc_status_type | |
1406 | mips_elf_got16_reloc (abfd, reloc_entry, symbol, data, input_section, | |
1407 | output_bfd, error_message) | |
1408 | bfd *abfd; | |
1409 | arelent *reloc_entry; | |
1410 | asymbol *symbol; | |
1411 | PTR data; | |
1412 | asection *input_section; | |
1413 | bfd *output_bfd; | |
1414 | char **error_message; | |
1415 | { | |
1416 | /* If we're relocating, and this is a local symbol, we can handle it | |
1417 | just like HI16. */ | |
1418 | if (output_bfd != (bfd *) NULL | |
1419 | && (symbol->flags & BSF_SECTION_SYM) != 0) | |
1420 | return mips_elf_hi16_reloc (abfd, reloc_entry, symbol, data, | |
1421 | input_section, output_bfd, error_message); | |
1422 | ||
1423 | /* Otherwise we try to handle it as R_MIPS_GOT_DISP. */ | |
1424 | return mips_elf_generic_reloc (abfd, reloc_entry, symbol, data, | |
1425 | input_section, output_bfd, error_message); | |
1426 | } | |
1427 | ||
1428 | /* Set the GP value for OUTPUT_BFD. Returns false if this is a | |
1429 | dangerous relocation. */ | |
1430 | ||
1431 | static boolean | |
1432 | mips_elf_assign_gp (output_bfd, pgp) | |
1433 | bfd *output_bfd; | |
1434 | bfd_vma *pgp; | |
1435 | { | |
1436 | unsigned int count; | |
1437 | asymbol **sym; | |
1438 | unsigned int i; | |
1439 | ||
1440 | /* If we've already figured out what GP will be, just return it. */ | |
1441 | *pgp = _bfd_get_gp_value (output_bfd); | |
1442 | if (*pgp) | |
1443 | return true; | |
1444 | ||
1445 | count = bfd_get_symcount (output_bfd); | |
1446 | sym = bfd_get_outsymbols (output_bfd); | |
1447 | ||
1448 | /* The linker script will have created a symbol named `_gp' with the | |
1449 | appropriate value. */ | |
1450 | if (sym == (asymbol **) NULL) | |
1451 | i = count; | |
1452 | else | |
1453 | { | |
1454 | for (i = 0; i < count; i++, sym++) | |
1455 | { | |
1456 | register const char *name; | |
1457 | ||
1458 | name = bfd_asymbol_name (*sym); | |
1459 | if (*name == '_' && strcmp (name, "_gp") == 0) | |
1460 | { | |
1461 | *pgp = bfd_asymbol_value (*sym); | |
1462 | _bfd_set_gp_value (output_bfd, *pgp); | |
1463 | break; | |
1464 | } | |
1465 | } | |
1466 | } | |
1467 | ||
1468 | if (i >= count) | |
1469 | { | |
1470 | /* Only get the error once. */ | |
1471 | *pgp = 4; | |
1472 | _bfd_set_gp_value (output_bfd, *pgp); | |
1473 | return false; | |
1474 | } | |
1475 | ||
1476 | return true; | |
1477 | } | |
1478 | ||
1479 | /* We have to figure out the gp value, so that we can adjust the | |
1480 | symbol value correctly. We look up the symbol _gp in the output | |
1481 | BFD. If we can't find it, we're stuck. We cache it in the ELF | |
1482 | target data. We don't need to adjust the symbol value for an | |
1483 | external symbol if we are producing relocateable output. */ | |
1484 | ||
1485 | static bfd_reloc_status_type | |
1486 | mips_elf_final_gp (output_bfd, symbol, relocateable, error_message, pgp) | |
1487 | bfd *output_bfd; | |
1488 | asymbol *symbol; | |
1489 | boolean relocateable; | |
1490 | char **error_message; | |
1491 | bfd_vma *pgp; | |
1492 | { | |
1493 | if (bfd_is_und_section (symbol->section) | |
1494 | && ! relocateable) | |
1495 | { | |
1496 | *pgp = 0; | |
1497 | return bfd_reloc_undefined; | |
1498 | } | |
1499 | ||
1500 | *pgp = _bfd_get_gp_value (output_bfd); | |
1501 | if (*pgp == 0 | |
1502 | && (! relocateable | |
1503 | || (symbol->flags & BSF_SECTION_SYM) != 0)) | |
1504 | { | |
1505 | if (relocateable) | |
1506 | { | |
1507 | /* Make up a value. */ | |
1508 | *pgp = symbol->section->output_section->vma + 0x4000; | |
1509 | _bfd_set_gp_value (output_bfd, *pgp); | |
1510 | } | |
1511 | else if (!mips_elf_assign_gp (output_bfd, pgp)) | |
1512 | { | |
1513 | *error_message = | |
1514 | (char *) _("GP relative relocation when _gp not defined"); | |
1515 | return bfd_reloc_dangerous; | |
1516 | } | |
1517 | } | |
1518 | ||
1519 | return bfd_reloc_ok; | |
1520 | } | |
1521 | ||
1522 | /* Do a R_MIPS_GPREL16 relocation. This is a 16 bit value which must | |
1523 | become the offset from the gp register. */ | |
1524 | ||
1525 | static bfd_reloc_status_type | |
1526 | mips_elf_gprel16_reloc (abfd, reloc_entry, symbol, data, input_section, | |
1527 | output_bfd, error_message) | |
1528 | bfd *abfd ATTRIBUTE_UNUSED; | |
1529 | arelent *reloc_entry; | |
1530 | asymbol *symbol; | |
1531 | PTR data ATTRIBUTE_UNUSED; | |
1532 | asection *input_section; | |
1533 | bfd *output_bfd; | |
1534 | char **error_message ATTRIBUTE_UNUSED; | |
1535 | { | |
1536 | boolean relocateable; | |
1537 | bfd_reloc_status_type ret; | |
1538 | bfd_vma gp; | |
1539 | ||
1540 | GET_RELOC_ADDEND (output_bfd, symbol, reloc_entry, input_section) | |
1541 | ||
1542 | if (output_bfd != (bfd *) NULL) | |
1543 | relocateable = true; | |
1544 | else | |
1545 | { | |
1546 | relocateable = false; | |
1547 | output_bfd = symbol->section->output_section->owner; | |
1548 | } | |
1549 | ||
1550 | ret = mips_elf_final_gp (output_bfd, symbol, relocateable, error_message, | |
1551 | &gp); | |
1552 | if (ret != bfd_reloc_ok) | |
1553 | return ret; | |
1554 | ||
1555 | return _bfd_mips_elf_gprel16_with_gp (abfd, symbol, reloc_entry, | |
1556 | input_section, relocateable, | |
1557 | data, gp); | |
1558 | } | |
1559 | ||
1560 | /* Do a R_MIPS_LITERAL relocation. */ | |
1561 | ||
1562 | static bfd_reloc_status_type | |
1563 | mips_elf_literal_reloc (abfd, reloc_entry, symbol, data, input_section, | |
1564 | output_bfd, error_message) | |
1565 | bfd *abfd; | |
1566 | arelent *reloc_entry; | |
1567 | asymbol *symbol; | |
1568 | PTR data; | |
1569 | asection *input_section; | |
1570 | bfd *output_bfd; | |
1571 | char **error_message; | |
1572 | { | |
1573 | boolean relocateable; | |
1574 | bfd_reloc_status_type ret; | |
1575 | bfd_vma gp; | |
1576 | ||
1577 | GET_RELOC_ADDEND (output_bfd, symbol, reloc_entry, input_section) | |
1578 | ||
1579 | /* FIXME: The entries in the .lit8 and .lit4 sections should be merged. */ | |
1580 | if (output_bfd != (bfd *) NULL) | |
1581 | relocateable = true; | |
1582 | else | |
1583 | { | |
1584 | relocateable = false; | |
1585 | output_bfd = symbol->section->output_section->owner; | |
1586 | } | |
1587 | ||
1588 | ret = mips_elf_final_gp (output_bfd, symbol, relocateable, error_message, | |
1589 | &gp); | |
1590 | if (ret != bfd_reloc_ok) | |
1591 | return ret; | |
1592 | ||
1593 | return _bfd_mips_elf_gprel16_with_gp (abfd, symbol, reloc_entry, | |
1594 | input_section, relocateable, | |
1595 | data, gp); | |
1596 | } | |
1597 | ||
1598 | /* Do a R_MIPS_GPREL32 relocation. This is a 32 bit value which must | |
1599 | become the offset from the gp register. */ | |
1600 | ||
1601 | static bfd_reloc_status_type | |
1602 | mips_elf_gprel32_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 | 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 | /* R_MIPS_GPREL32 relocations are defined for local symbols only. | |
1619 | We will only have an addend if this is a newly created reloc, | |
1620 | not read from an ELF file. */ | |
1621 | if (output_bfd != (bfd *) NULL | |
1622 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
1623 | && reloc_entry->addend == 0) | |
1624 | { | |
1625 | *error_message = (char *) | |
1626 | _("32bits gp relative relocation occurs for an external symbol"); | |
1627 | return bfd_reloc_outofrange; | |
1628 | } | |
1629 | ||
1630 | if (output_bfd != (bfd *) NULL) | |
1631 | { | |
1632 | relocateable = true; | |
1633 | gp = _bfd_get_gp_value (output_bfd); | |
1634 | } | |
1635 | else | |
1636 | { | |
1637 | relocateable = false; | |
1638 | output_bfd = symbol->section->output_section->owner; | |
1639 | ||
1640 | ret = mips_elf_final_gp (output_bfd, symbol, relocateable, | |
1641 | error_message, &gp); | |
1642 | if (ret != bfd_reloc_ok) | |
1643 | return ret; | |
1644 | } | |
1645 | ||
1646 | return gprel32_with_gp (abfd, symbol, reloc_entry, input_section, | |
1647 | relocateable, data, gp); | |
1648 | } | |
1649 | ||
1650 | static bfd_reloc_status_type | |
1651 | gprel32_with_gp (abfd, symbol, reloc_entry, input_section, relocateable, data, | |
1652 | gp) | |
1653 | bfd *abfd; | |
1654 | asymbol *symbol; | |
1655 | arelent *reloc_entry; | |
1656 | asection *input_section; | |
1657 | boolean relocateable; | |
1658 | PTR data; | |
1659 | bfd_vma gp; | |
1660 | { | |
1661 | bfd_vma relocation; | |
1662 | unsigned long val; | |
1663 | ||
1664 | if (bfd_is_com_section (symbol->section)) | |
1665 | relocation = 0; | |
1666 | else | |
1667 | relocation = symbol->value; | |
1668 | ||
1669 | relocation += symbol->section->output_section->vma; | |
1670 | relocation += symbol->section->output_offset; | |
1671 | ||
1672 | if (reloc_entry->address > input_section->_cooked_size) | |
1673 | return bfd_reloc_outofrange; | |
1674 | ||
1675 | if (reloc_entry->howto->src_mask == 0) | |
1676 | val = 0; | |
1677 | else | |
1678 | val = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); | |
1679 | ||
1680 | /* Set val to the offset into the section or symbol. */ | |
1681 | val += reloc_entry->addend; | |
1682 | ||
1683 | /* Adjust val for the final section location and GP value. If we | |
1684 | are producing relocateable output, we don't want to do this for | |
1685 | an external symbol. */ | |
1686 | if (! relocateable | |
1687 | || (symbol->flags & BSF_SECTION_SYM) != 0) | |
1688 | val += relocation - gp; | |
1689 | ||
1690 | bfd_put_32 (abfd, (bfd_vma) val, (bfd_byte *) data + reloc_entry->address); | |
1691 | ||
1692 | if (relocateable) | |
1693 | reloc_entry->address += input_section->output_offset; | |
1694 | ||
1695 | return bfd_reloc_ok; | |
1696 | } | |
1697 | ||
1698 | /* Do a R_MIPS_SHIFT6 relocation. The MSB of the shift is stored at bit 2, | |
1699 | the rest is at bits 6-10. The bitpos already got right by the howto. */ | |
1700 | ||
1701 | static bfd_reloc_status_type | |
1702 | mips_elf_shift6_reloc (abfd, reloc_entry, symbol, data, input_section, | |
1703 | output_bfd, error_message) | |
1704 | bfd *abfd ATTRIBUTE_UNUSED; | |
1705 | arelent *reloc_entry; | |
1706 | asymbol *symbol; | |
1707 | PTR data ATTRIBUTE_UNUSED; | |
1708 | asection *input_section; | |
1709 | bfd *output_bfd; | |
1710 | char **error_message ATTRIBUTE_UNUSED; | |
1711 | { | |
1712 | GET_RELOC_ADDEND (output_bfd, symbol, reloc_entry, input_section) | |
1713 | ||
1714 | reloc_entry->addend = (reloc_entry->addend & 0x00007c0) | |
1715 | | (reloc_entry->addend & 0x00000800) >> 9; | |
1716 | ||
1717 | SET_RELOC_ADDEND (reloc_entry) | |
1718 | ||
1719 | return bfd_reloc_continue; | |
1720 | } | |
1721 | \f | |
1722 | /* Handle a mips16 jump. */ | |
1723 | ||
1724 | static bfd_reloc_status_type | |
1725 | mips16_jump_reloc (abfd, reloc_entry, symbol, data, input_section, | |
1726 | output_bfd, error_message) | |
1727 | bfd *abfd ATTRIBUTE_UNUSED; | |
1728 | arelent *reloc_entry; | |
1729 | asymbol *symbol; | |
1730 | PTR data ATTRIBUTE_UNUSED; | |
1731 | asection *input_section; | |
1732 | bfd *output_bfd; | |
1733 | char **error_message ATTRIBUTE_UNUSED; | |
1734 | { | |
1735 | static boolean warned = false; | |
1736 | ||
1737 | GET_RELOC_ADDEND (output_bfd, symbol, reloc_entry, input_section) | |
1738 | ||
1739 | /* FIXME. */ | |
1740 | if (! warned) | |
1741 | (*_bfd_error_handler) | |
1742 | (_("Linking mips16 objects into %s format is not supported"), | |
1743 | bfd_get_target (input_section->output_section->owner)); | |
1744 | warned = true; | |
1745 | ||
1746 | return bfd_reloc_undefined; | |
1747 | } | |
1748 | ||
1749 | /* Handle a mips16 GP relative reloc. */ | |
1750 | ||
1751 | static bfd_reloc_status_type | |
1752 | mips16_gprel_reloc (abfd, reloc_entry, symbol, data, input_section, | |
1753 | output_bfd, error_message) | |
1754 | bfd *abfd; | |
1755 | arelent *reloc_entry; | |
1756 | asymbol *symbol; | |
1757 | PTR data; | |
1758 | asection *input_section; | |
1759 | bfd *output_bfd; | |
1760 | char **error_message; | |
1761 | { | |
1762 | boolean relocateable; | |
1763 | bfd_reloc_status_type ret; | |
1764 | bfd_vma gp; | |
1765 | unsigned short extend, insn; | |
1766 | unsigned long final; | |
1767 | ||
1768 | GET_RELOC_ADDEND (output_bfd, symbol, reloc_entry, input_section) | |
1769 | ||
1770 | if (output_bfd != NULL) | |
1771 | relocateable = true; | |
1772 | else | |
1773 | { | |
1774 | relocateable = false; | |
1775 | output_bfd = symbol->section->output_section->owner; | |
1776 | } | |
1777 | ||
1778 | ret = mips_elf_final_gp (output_bfd, symbol, relocateable, error_message, | |
1779 | &gp); | |
1780 | if (ret != bfd_reloc_ok) | |
1781 | return ret; | |
1782 | ||
1783 | if (reloc_entry->address > input_section->_cooked_size) | |
1784 | return bfd_reloc_outofrange; | |
1785 | ||
1786 | /* Pick up the mips16 extend instruction and the real instruction. */ | |
1787 | extend = bfd_get_16 (abfd, (bfd_byte *) data + reloc_entry->address); | |
1788 | insn = bfd_get_16 (abfd, (bfd_byte *) data + reloc_entry->address + 2); | |
1789 | ||
1790 | /* Stuff the current addend back as a 32 bit value, do the usual | |
1791 | relocation, and then clean up. */ | |
1792 | bfd_put_32 (abfd, | |
1793 | (bfd_vma) (((extend & 0x1f) << 11) | |
1794 | | (extend & 0x7e0) | |
1795 | | (insn & 0x1f)), | |
1796 | (bfd_byte *) data + reloc_entry->address); | |
1797 | ||
1798 | ret = _bfd_mips_elf_gprel16_with_gp (abfd, symbol, reloc_entry, | |
1799 | input_section, relocateable, data, gp); | |
1800 | ||
1801 | final = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); | |
1802 | bfd_put_16 (abfd, | |
1803 | (bfd_vma) ((extend & 0xf800) | |
1804 | | ((final >> 11) & 0x1f) | |
1805 | | (final & 0x7e0)), | |
1806 | (bfd_byte *) data + reloc_entry->address); | |
1807 | bfd_put_16 (abfd, | |
1808 | (bfd_vma) ((insn & 0xffe0) | |
1809 | | (final & 0x1f)), | |
1810 | (bfd_byte *) data + reloc_entry->address + 2); | |
1811 | ||
1812 | return ret; | |
1813 | } | |
1814 | ||
1815 | #undef GET_RELOC_ADDEND | |
1816 | #undef SET_RELOC_ADDEND | |
1817 | \f | |
1818 | /* A mapping from BFD reloc types to MIPS ELF reloc types. */ | |
1819 | ||
1820 | struct elf_reloc_map { | |
1821 | bfd_reloc_code_real_type bfd_val; | |
1822 | enum elf_mips_reloc_type elf_val; | |
1823 | }; | |
1824 | ||
1825 | static const struct elf_reloc_map mips_reloc_map[] = | |
1826 | { | |
1827 | { BFD_RELOC_NONE, R_MIPS_NONE }, | |
1828 | { BFD_RELOC_16, R_MIPS_16 }, | |
1829 | { BFD_RELOC_32, R_MIPS_32 }, | |
1830 | /* There is no BFD reloc for R_MIPS_REL32. */ | |
1831 | { BFD_RELOC_CTOR, R_MIPS_32 }, | |
1832 | { BFD_RELOC_64, R_MIPS_64 }, | |
1833 | { BFD_RELOC_16_PCREL, R_MIPS_PC16 }, | |
1834 | { BFD_RELOC_HI16_S, R_MIPS_HI16 }, | |
1835 | { BFD_RELOC_LO16, R_MIPS_LO16 }, | |
1836 | { BFD_RELOC_GPREL16, R_MIPS_GPREL16 }, | |
1837 | { BFD_RELOC_GPREL32, R_MIPS_GPREL32 }, | |
1838 | { BFD_RELOC_MIPS_JMP, R_MIPS_26 }, | |
1839 | { BFD_RELOC_MIPS_LITERAL, R_MIPS_LITERAL }, | |
1840 | { BFD_RELOC_MIPS_GOT16, R_MIPS_GOT16 }, | |
1841 | { BFD_RELOC_MIPS_CALL16, R_MIPS_CALL16 }, | |
1842 | { BFD_RELOC_MIPS_SHIFT5, R_MIPS_SHIFT5 }, | |
1843 | { BFD_RELOC_MIPS_SHIFT6, R_MIPS_SHIFT6 }, | |
1844 | { BFD_RELOC_MIPS_GOT_DISP, R_MIPS_GOT_DISP }, | |
1845 | { BFD_RELOC_MIPS_GOT_PAGE, R_MIPS_GOT_PAGE }, | |
1846 | { BFD_RELOC_MIPS_GOT_OFST, R_MIPS_GOT_OFST }, | |
1847 | { BFD_RELOC_MIPS_GOT_HI16, R_MIPS_GOT_HI16 }, | |
1848 | { BFD_RELOC_MIPS_GOT_LO16, R_MIPS_GOT_LO16 }, | |
1849 | { BFD_RELOC_MIPS_SUB, R_MIPS_SUB }, | |
1850 | { BFD_RELOC_MIPS_INSERT_A, R_MIPS_INSERT_A }, | |
1851 | { BFD_RELOC_MIPS_INSERT_B, R_MIPS_INSERT_B }, | |
1852 | { BFD_RELOC_MIPS_DELETE, R_MIPS_DELETE }, | |
1853 | { BFD_RELOC_MIPS_HIGHEST, R_MIPS_HIGHEST }, | |
1854 | { BFD_RELOC_MIPS_HIGHER, R_MIPS_HIGHER }, | |
1855 | { BFD_RELOC_MIPS_CALL_HI16, R_MIPS_CALL_HI16 }, | |
1856 | { BFD_RELOC_MIPS_CALL_LO16, R_MIPS_CALL_LO16 }, | |
1857 | { BFD_RELOC_MIPS_SCN_DISP, R_MIPS_SCN_DISP }, | |
1858 | { BFD_RELOC_MIPS_REL16, R_MIPS_REL16 }, | |
1859 | /* Use of R_MIPS_ADD_IMMEDIATE and R_MIPS_PJUMP is deprecated. */ | |
1860 | { BFD_RELOC_MIPS_RELGOT, R_MIPS_RELGOT }, | |
1861 | { BFD_RELOC_MIPS_JALR, R_MIPS_JALR } | |
1862 | }; | |
1863 | ||
1864 | /* Given a BFD reloc type, return a howto structure. */ | |
1865 | ||
1866 | static reloc_howto_type * | |
1867 | bfd_elf32_bfd_reloc_type_lookup (abfd, code) | |
1868 | bfd *abfd ATTRIBUTE_UNUSED; | |
1869 | bfd_reloc_code_real_type code; | |
1870 | { | |
1871 | unsigned int i; | |
1872 | /* FIXME: We default to RELA here instead of choosing the right | |
1873 | relocation variant. */ | |
1874 | reloc_howto_type *howto_table = elf_mips_howto_table_rela; | |
1875 | ||
1876 | for (i = 0; i < sizeof (mips_reloc_map) / sizeof (struct elf_reloc_map); | |
1877 | i++) | |
1878 | { | |
1879 | if (mips_reloc_map[i].bfd_val == code) | |
1880 | return &howto_table[(int) mips_reloc_map[i].elf_val]; | |
1881 | } | |
1882 | ||
1883 | switch (code) | |
1884 | { | |
1885 | case BFD_RELOC_MIPS16_JMP: | |
1886 | return &elf_mips16_jump_howto; | |
1887 | case BFD_RELOC_MIPS16_GPREL: | |
1888 | return &elf_mips16_gprel_howto; | |
1889 | case BFD_RELOC_VTABLE_INHERIT: | |
1890 | return &elf_mips_gnu_vtinherit_howto; | |
1891 | case BFD_RELOC_VTABLE_ENTRY: | |
1892 | return &elf_mips_gnu_vtentry_howto; | |
1893 | default: | |
1894 | bfd_set_error (bfd_error_bad_value); | |
1895 | return NULL; | |
1896 | } | |
1897 | } | |
1898 | ||
1899 | /* Given a MIPS Elf32_Internal_Rel, fill in an arelent structure. */ | |
1900 | ||
1901 | static reloc_howto_type * | |
1902 | mips_elf_n32_rtype_to_howto (r_type, rela_p) | |
1903 | unsigned int r_type; | |
1904 | boolean rela_p; | |
1905 | { | |
1906 | switch (r_type) | |
1907 | { | |
1908 | case R_MIPS16_26: | |
1909 | return &elf_mips16_jump_howto; | |
1910 | case R_MIPS16_GPREL: | |
1911 | return &elf_mips16_gprel_howto; | |
1912 | case R_MIPS_GNU_VTINHERIT: | |
1913 | return &elf_mips_gnu_vtinherit_howto; | |
1914 | case R_MIPS_GNU_VTENTRY: | |
1915 | return &elf_mips_gnu_vtentry_howto; | |
1916 | default: | |
1917 | BFD_ASSERT (r_type < (unsigned int) R_MIPS_max); | |
1918 | if (rela_p) | |
1919 | return &elf_mips_howto_table_rela[r_type]; | |
1920 | else | |
1921 | return &elf_mips_howto_table_rel[r_type]; | |
1922 | break; | |
1923 | } | |
1924 | } | |
1925 | ||
1926 | /* Given a MIPS Elf32_Internal_Rel, fill in an arelent structure. */ | |
1927 | ||
1928 | static void | |
1929 | mips_info_to_howto_rel (abfd, cache_ptr, dst) | |
1930 | bfd *abfd; | |
1931 | arelent *cache_ptr; | |
1932 | Elf32_Internal_Rel *dst; | |
1933 | { | |
1934 | unsigned int r_type; | |
1935 | ||
1936 | r_type = ELF32_R_TYPE (dst->r_info); | |
1937 | cache_ptr->howto = mips_elf_n32_rtype_to_howto (r_type, false); | |
1938 | ||
1939 | /* The addend for a GPREL16 or LITERAL relocation comes from the GP | |
1940 | value for the object file. We get the addend now, rather than | |
1941 | when we do the relocation, because the symbol manipulations done | |
1942 | by the linker may cause us to lose track of the input BFD. */ | |
1943 | if (((*cache_ptr->sym_ptr_ptr)->flags & BSF_SECTION_SYM) != 0 | |
1944 | && (r_type == (unsigned int) R_MIPS_GPREL16 | |
1945 | || r_type == (unsigned int) R_MIPS_LITERAL)) | |
1946 | cache_ptr->addend = elf_gp (abfd); | |
1947 | } | |
1948 | ||
1949 | /* Given a MIPS Elf32_Internal_Rela, fill in an arelent structure. */ | |
1950 | ||
1951 | static void | |
1952 | mips_info_to_howto_rela (abfd, cache_ptr, dst) | |
1953 | bfd *abfd ATTRIBUTE_UNUSED; | |
1954 | arelent *cache_ptr; | |
1955 | Elf32_Internal_Rela *dst; | |
1956 | { | |
1957 | unsigned int r_type; | |
1958 | ||
1959 | r_type = ELF32_R_TYPE (dst->r_info); | |
1960 | cache_ptr->howto = mips_elf_n32_rtype_to_howto (r_type, true); | |
1961 | cache_ptr->addend = dst->r_addend; | |
1962 | } | |
1963 | \f | |
1964 | /* Determine whether a symbol is global for the purposes of splitting | |
1965 | the symbol table into global symbols and local symbols. At least | |
1966 | on Irix 5, this split must be between section symbols and all other | |
1967 | symbols. On most ELF targets the split is between static symbols | |
1968 | and externally visible symbols. */ | |
1969 | ||
1970 | static boolean | |
1971 | mips_elf_sym_is_global (abfd, sym) | |
1972 | bfd *abfd ATTRIBUTE_UNUSED; | |
1973 | asymbol *sym; | |
1974 | { | |
1975 | if (SGI_COMPAT (abfd)) | |
1976 | return (sym->flags & BSF_SECTION_SYM) == 0; | |
1977 | else | |
1978 | return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0 | |
1979 | || bfd_is_und_section (bfd_get_section (sym)) | |
1980 | || bfd_is_com_section (bfd_get_section (sym))); | |
1981 | } | |
1982 | \f | |
1983 | /* Set the right machine number for a MIPS ELF file. */ | |
1984 | ||
1985 | static boolean | |
1986 | mips_elf_n32_object_p (abfd) | |
1987 | bfd *abfd; | |
1988 | { | |
1989 | unsigned long mach; | |
1990 | ||
1991 | /* Irix 5 and 6 are broken. Object file symbol tables are not always | |
1992 | sorted correctly such that local symbols precede global symbols, | |
1993 | and the sh_info field in the symbol table is not always right. */ | |
1994 | if (SGI_COMPAT (abfd)) | |
1995 | elf_bad_symtab (abfd) = true; | |
1996 | ||
1997 | mach = _bfd_elf_mips_mach (elf_elfheader (abfd)->e_flags); | |
1998 | bfd_default_set_arch_mach (abfd, bfd_arch_mips, mach); | |
1999 | ||
2000 | if (! ABI_N32_P(abfd)) | |
2001 | return false; | |
2002 | ||
2003 | return true; | |
2004 | } | |
2005 | \f | |
2006 | /* Support for core dump NOTE sections. */ | |
2007 | static boolean | |
2008 | elf32_mips_grok_prstatus (abfd, note) | |
2009 | bfd *abfd; | |
2010 | Elf_Internal_Note *note; | |
2011 | { | |
2012 | int offset; | |
2013 | unsigned int raw_size; | |
2014 | ||
2015 | switch (note->descsz) | |
2016 | { | |
2017 | default: | |
2018 | return false; | |
2019 | ||
2020 | case 256: /* Linux/MIPS */ | |
2021 | /* pr_cursig */ | |
2022 | elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); | |
2023 | ||
2024 | /* pr_pid */ | |
2025 | elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); | |
2026 | ||
2027 | /* pr_reg */ | |
2028 | offset = 72; | |
2029 | raw_size = 180; | |
2030 | ||
2031 | break; | |
2032 | } | |
2033 | ||
2034 | /* Make a ".reg/999" section. */ | |
2035 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", raw_size, | |
2036 | note->descpos + offset); | |
2037 | } | |
2038 | ||
2039 | static boolean | |
2040 | elf32_mips_grok_psinfo (abfd, note) | |
2041 | bfd *abfd; | |
2042 | Elf_Internal_Note *note; | |
2043 | { | |
2044 | switch (note->descsz) | |
2045 | { | |
2046 | default: | |
2047 | return false; | |
2048 | ||
2049 | case 128: /* Linux/MIPS elf_prpsinfo */ | |
2050 | elf_tdata (abfd)->core_program | |
2051 | = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16); | |
2052 | elf_tdata (abfd)->core_command | |
2053 | = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80); | |
2054 | } | |
2055 | ||
2056 | /* Note that for some reason, a spurious space is tacked | |
2057 | onto the end of the args in some (at least one anyway) | |
2058 | implementations, so strip it off if it exists. */ | |
2059 | ||
2060 | { | |
2061 | char *command = elf_tdata (abfd)->core_command; | |
2062 | int n = strlen (command); | |
2063 | ||
2064 | if (0 < n && command[n - 1] == ' ') | |
2065 | command[n - 1] = '\0'; | |
2066 | } | |
2067 | ||
2068 | return true; | |
2069 | } | |
2070 | \f | |
2071 | /* Depending on the target vector we generate some version of Irix | |
2072 | executables or "normal" MIPS ELF ABI executables. */ | |
2073 | static irix_compat_t | |
2074 | elf_n32_mips_irix_compat (abfd) | |
2075 | bfd *abfd; | |
2076 | { | |
2077 | if ((abfd->xvec == &bfd_elf32_nbigmips_vec) | |
2078 | || (abfd->xvec == &bfd_elf32_nlittlemips_vec)) | |
2079 | return ict_irix6; | |
2080 | else | |
2081 | return ict_none; | |
2082 | } | |
2083 | \f | |
2084 | /* ECOFF swapping routines. These are used when dealing with the | |
2085 | .mdebug section, which is in the ECOFF debugging format. */ | |
2086 | static const struct ecoff_debug_swap mips_elf32_ecoff_debug_swap = { | |
2087 | /* Symbol table magic number. */ | |
2088 | magicSym, | |
2089 | /* Alignment of debugging information. E.g., 4. */ | |
2090 | 4, | |
2091 | /* Sizes of external symbolic information. */ | |
2092 | sizeof (struct hdr_ext), | |
2093 | sizeof (struct dnr_ext), | |
2094 | sizeof (struct pdr_ext), | |
2095 | sizeof (struct sym_ext), | |
2096 | sizeof (struct opt_ext), | |
2097 | sizeof (struct fdr_ext), | |
2098 | sizeof (struct rfd_ext), | |
2099 | sizeof (struct ext_ext), | |
2100 | /* Functions to swap in external symbolic data. */ | |
2101 | ecoff_swap_hdr_in, | |
2102 | ecoff_swap_dnr_in, | |
2103 | ecoff_swap_pdr_in, | |
2104 | ecoff_swap_sym_in, | |
2105 | ecoff_swap_opt_in, | |
2106 | ecoff_swap_fdr_in, | |
2107 | ecoff_swap_rfd_in, | |
2108 | ecoff_swap_ext_in, | |
2109 | _bfd_ecoff_swap_tir_in, | |
2110 | _bfd_ecoff_swap_rndx_in, | |
2111 | /* Functions to swap out external symbolic data. */ | |
2112 | ecoff_swap_hdr_out, | |
2113 | ecoff_swap_dnr_out, | |
2114 | ecoff_swap_pdr_out, | |
2115 | ecoff_swap_sym_out, | |
2116 | ecoff_swap_opt_out, | |
2117 | ecoff_swap_fdr_out, | |
2118 | ecoff_swap_rfd_out, | |
2119 | ecoff_swap_ext_out, | |
2120 | _bfd_ecoff_swap_tir_out, | |
2121 | _bfd_ecoff_swap_rndx_out, | |
2122 | /* Function to read in symbolic data. */ | |
2123 | _bfd_mips_elf_read_ecoff_info | |
2124 | }; | |
2125 | \f | |
2126 | #define ELF_ARCH bfd_arch_mips | |
2127 | #define ELF_MACHINE_CODE EM_MIPS | |
2128 | ||
2129 | /* The SVR4 MIPS ABI says that this should be 0x10000, but Irix 5 uses | |
2130 | a value of 0x1000, and we are compatible. | |
2131 | FIXME: How does this affect NewABI? */ | |
2132 | #define ELF_MAXPAGESIZE 0x1000 | |
2133 | ||
2134 | #define elf_backend_collect true | |
2135 | #define elf_backend_type_change_ok true | |
2136 | #define elf_backend_can_gc_sections true | |
2137 | #define elf_info_to_howto mips_info_to_howto_rela | |
2138 | #define elf_info_to_howto_rel mips_info_to_howto_rel | |
2139 | #define elf_backend_sym_is_global mips_elf_sym_is_global | |
2140 | #define elf_backend_object_p mips_elf_n32_object_p | |
2141 | #define elf_backend_symbol_processing _bfd_mips_elf_symbol_processing | |
2142 | #define elf_backend_section_processing _bfd_mips_elf_section_processing | |
2143 | #define elf_backend_section_from_shdr _bfd_mips_elf_section_from_shdr | |
2144 | #define elf_backend_fake_sections _bfd_mips_elf_fake_sections | |
2145 | #define elf_backend_section_from_bfd_section \ | |
2146 | _bfd_mips_elf_section_from_bfd_section | |
2147 | #define elf_backend_add_symbol_hook _bfd_mips_elf_add_symbol_hook | |
2148 | #define elf_backend_link_output_symbol_hook \ | |
2149 | _bfd_mips_elf_link_output_symbol_hook | |
2150 | #define elf_backend_create_dynamic_sections \ | |
2151 | _bfd_mips_elf_create_dynamic_sections | |
2152 | #define elf_backend_check_relocs _bfd_mips_elf_check_relocs | |
2153 | #define elf_backend_adjust_dynamic_symbol \ | |
2154 | _bfd_mips_elf_adjust_dynamic_symbol | |
2155 | #define elf_backend_always_size_sections \ | |
2156 | _bfd_mips_elf_always_size_sections | |
2157 | #define elf_backend_size_dynamic_sections \ | |
2158 | _bfd_mips_elf_size_dynamic_sections | |
2159 | #define elf_backend_relocate_section _bfd_mips_elf_relocate_section | |
2160 | #define elf_backend_finish_dynamic_symbol \ | |
2161 | _bfd_mips_elf_finish_dynamic_symbol | |
2162 | #define elf_backend_finish_dynamic_sections \ | |
2163 | _bfd_mips_elf_finish_dynamic_sections | |
2164 | #define elf_backend_final_write_processing \ | |
2165 | _bfd_mips_elf_final_write_processing | |
2166 | #define elf_backend_additional_program_headers \ | |
2167 | _bfd_mips_elf_additional_program_headers | |
2168 | #define elf_backend_modify_segment_map _bfd_mips_elf_modify_segment_map | |
2169 | #define elf_backend_gc_mark_hook _bfd_mips_elf_gc_mark_hook | |
2170 | #define elf_backend_gc_sweep_hook _bfd_mips_elf_gc_sweep_hook | |
2171 | #define elf_backend_copy_indirect_symbol \ | |
2172 | _bfd_mips_elf_copy_indirect_symbol | |
2173 | #define elf_backend_hide_symbol _bfd_mips_elf_hide_symbol | |
2174 | #define elf_backend_grok_prstatus elf32_mips_grok_prstatus | |
2175 | #define elf_backend_grok_psinfo elf32_mips_grok_psinfo | |
2176 | #define elf_backend_ecoff_debug_swap &mips_elf32_ecoff_debug_swap | |
2177 | ||
2178 | #define elf_backend_got_header_size (4 * MIPS_RESERVED_GOTNO) | |
2179 | #define elf_backend_plt_header_size 0 | |
2180 | ||
2181 | /* MIPS n32 ELF can use a mixture of REL and RELA, but some Relocations | |
2182 | work better/work only in RELA, so we default to this. */ | |
2183 | #define elf_backend_may_use_rel_p 1 | |
2184 | #define elf_backend_may_use_rela_p 1 | |
2185 | #define elf_backend_default_use_rela_p 1 | |
2186 | #define elf_backend_sign_extend_vma true | |
2187 | ||
2188 | #define elf_backend_discard_info _bfd_mips_elf_discard_info | |
2189 | #define elf_backend_ignore_discarded_relocs \ | |
2190 | _bfd_mips_elf_ignore_discarded_relocs | |
2191 | #define elf_backend_write_section _bfd_mips_elf_write_section | |
2192 | #define elf_backend_mips_irix_compat elf_n32_mips_irix_compat | |
2193 | #define elf_backend_mips_rtype_to_howto mips_elf_n32_rtype_to_howto | |
2194 | #define bfd_elf32_find_nearest_line _bfd_mips_elf_find_nearest_line | |
2195 | #define bfd_elf32_set_section_contents _bfd_mips_elf_set_section_contents | |
2196 | #define bfd_elf32_bfd_get_relocated_section_contents \ | |
2197 | _bfd_elf_mips_get_relocated_section_contents | |
2198 | #define bfd_elf32_bfd_link_hash_table_create \ | |
2199 | _bfd_mips_elf_link_hash_table_create | |
2200 | #define bfd_elf32_bfd_final_link _bfd_mips_elf_final_link | |
2201 | #define bfd_elf32_bfd_merge_private_bfd_data \ | |
2202 | _bfd_mips_elf_merge_private_bfd_data | |
2203 | #define bfd_elf32_bfd_set_private_flags _bfd_mips_elf_set_private_flags | |
2204 | #define bfd_elf32_bfd_print_private_bfd_data \ | |
2205 | _bfd_mips_elf_print_private_bfd_data | |
2206 | ||
2207 | /* Support for SGI-ish mips targets using n32 ABI. */ | |
2208 | ||
2209 | #define TARGET_LITTLE_SYM bfd_elf32_nlittlemips_vec | |
2210 | #define TARGET_LITTLE_NAME "elf32-nlittlemips" | |
2211 | #define TARGET_BIG_SYM bfd_elf32_nbigmips_vec | |
2212 | #define TARGET_BIG_NAME "elf32-nbigmips" | |
2213 | ||
2214 | #include "elf32-target.h" | |
2215 | ||
2216 | /* Support for traditional mips targets using n32 ABI. */ | |
2217 | #define INCLUDED_TARGET_FILE /* More a type of flag. */ | |
2218 | ||
2219 | #undef TARGET_LITTLE_SYM | |
2220 | #undef TARGET_LITTLE_NAME | |
2221 | #undef TARGET_BIG_SYM | |
2222 | #undef TARGET_BIG_NAME | |
2223 | ||
2224 | #define TARGET_LITTLE_SYM bfd_elf32_ntradlittlemips_vec | |
2225 | #define TARGET_LITTLE_NAME "elf32-ntradlittlemips" | |
2226 | #define TARGET_BIG_SYM bfd_elf32_ntradbigmips_vec | |
2227 | #define TARGET_BIG_NAME "elf32-ntradbigmips" | |
2228 | ||
2229 | /* Include the target file again for this target. */ | |
2230 | #include "elf32-target.h" |