Commit | Line | Data |
---|---|---|
efcbd82c | 1 | /* MIPS-specific support for 32-bit ELF |
3f0a7f7f | 2 | Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 |
be3ccd9c | 3 | Free Software Foundation, Inc. |
252b5132 RH |
4 | |
5 | Most of the information added by Ian Lance Taylor, Cygnus Support, | |
6 | <ian@cygnus.com>. | |
103186c6 MM |
7 | N32/64 ABI support added by Mark Mitchell, CodeSourcery, LLC. |
8 | <mark@codesourcery.com> | |
f7cb7d68 UC |
9 | Traditional MIPS targets support added by Koundinya.K, Dansk Data |
10 | Elektronik & Operations Research Group. <kk@ddeorg.soft.net> | |
252b5132 RH |
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" | |
c6e90b02 | 38 | #include "elfxx-mips.h" |
252b5132 RH |
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" | |
23e2c83b | 47 | #define ECOFF_SIGNED_32 |
252b5132 RH |
48 | #include "ecoffswap.h" |
49 | ||
c6e90b02 TS |
50 | static bfd_reloc_status_type mips_elf_hi16_reloc |
51 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
52 | static bfd_reloc_status_type mips_elf_lo16_reloc | |
53 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
54 | static bfd_reloc_status_type mips_elf_got16_reloc | |
55 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
56 | static bfd_reloc_status_type mips_elf_gprel32_reloc | |
57 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
252b5132 RH |
58 | static bfd_reloc_status_type mips32_64bit_reloc |
59 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
60 | static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup | |
61 | PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
c6e90b02 TS |
62 | static reloc_howto_type *mips_elf32_rtype_to_howto |
63 | PARAMS ((unsigned int, boolean)); | |
252b5132 RH |
64 | static void mips_info_to_howto_rel |
65 | PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *)); | |
3f830999 MM |
66 | static void mips_info_to_howto_rela |
67 | PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *)); | |
252b5132 | 68 | static boolean mips_elf_sym_is_global PARAMS ((bfd *, asymbol *)); |
c6e90b02 | 69 | static boolean mips_elf32_object_p PARAMS ((bfd *)); |
252b5132 RH |
70 | static boolean mips_elf_is_local_label_name |
71 | PARAMS ((bfd *, const char *)); | |
252b5132 RH |
72 | static bfd_reloc_status_type mips16_jump_reloc |
73 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
74 | static bfd_reloc_status_type mips16_gprel_reloc | |
75 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
252b5132 RH |
76 | static bfd_reloc_status_type mips_elf_final_gp |
77 | PARAMS ((bfd *, asymbol *, boolean, char **, bfd_vma *)); | |
7403cb63 | 78 | static boolean mips_elf_assign_gp PARAMS ((bfd *, bfd_vma *)); |
c6e90b02 | 79 | static boolean elf32_mips_grok_prstatus |
9e80ff3a | 80 | PARAMS ((bfd *, Elf_Internal_Note *)); |
c6e90b02 | 81 | static boolean elf32_mips_grok_psinfo |
9e80ff3a | 82 | PARAMS ((bfd *, Elf_Internal_Note *)); |
c6e90b02 | 83 | static boolean elf32_mips_discard_info |
73d074b4 | 84 | PARAMS ((bfd *, struct elf_reloc_cookie *, struct bfd_link_info *)); |
c6e90b02 | 85 | static boolean elf32_mips_write_section |
73d074b4 | 86 | PARAMS ((bfd *, asection *, bfd_byte *)); |
c6e90b02 TS |
87 | static irix_compat_t elf32_mips_irix_compat |
88 | PARAMS ((bfd *)); | |
252b5132 | 89 | |
cb7394f2 TS |
90 | extern const bfd_target bfd_elf32_bigmips_vec; |
91 | extern const bfd_target bfd_elf32_littlemips_vec; | |
adb76a3e | 92 | |
a94a7c1c | 93 | /* Nonzero if ABFD is using the N32 ABI. */ |
a94a7c1c MM |
94 | #define ABI_N32_P(abfd) \ |
95 | ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI2) != 0) | |
96 | ||
4e8a9624 | 97 | /* Whether we are trying to be compatible with IRIX at all. */ |
a94a7c1c | 98 | #define SGI_COMPAT(abfd) \ |
c6e90b02 | 99 | (elf32_mips_irix_compat (abfd) != ict_none) |
103186c6 | 100 | |
252b5132 RH |
101 | /* The number of local .got entries we reserve. */ |
102 | #define MIPS_RESERVED_GOTNO (2) | |
103 | ||
3f830999 MM |
104 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value |
105 | from smaller values. Start with zero, widen, *then* decrement. */ | |
106 | #define MINUS_ONE (((bfd_vma)0) - 1) | |
107 | ||
d75bc93d TS |
108 | /* The relocation table used for SHT_REL sections. */ |
109 | ||
110 | static reloc_howto_type elf_mips_howto_table_rel[] = | |
111 | { | |
112 | /* No relocation. */ | |
113 | HOWTO (R_MIPS_NONE, /* type */ | |
114 | 0, /* rightshift */ | |
115 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
116 | 0, /* bitsize */ | |
117 | false, /* pc_relative */ | |
118 | 0, /* bitpos */ | |
119 | complain_overflow_dont, /* complain_on_overflow */ | |
120 | bfd_elf_generic_reloc, /* special_function */ | |
121 | "R_MIPS_NONE", /* name */ | |
122 | false, /* partial_inplace */ | |
123 | 0, /* src_mask */ | |
124 | 0, /* dst_mask */ | |
125 | false), /* pcrel_offset */ | |
126 | ||
127 | /* 16 bit relocation. */ | |
128 | HOWTO (R_MIPS_16, /* type */ | |
129 | 0, /* rightshift */ | |
130 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
131 | 16, /* bitsize */ | |
132 | false, /* pc_relative */ | |
133 | 0, /* bitpos */ | |
134 | complain_overflow_signed, /* complain_on_overflow */ | |
135 | bfd_elf_generic_reloc, /* special_function */ | |
136 | "R_MIPS_16", /* name */ | |
137 | true, /* partial_inplace */ | |
138 | 0x0000ffff, /* src_mask */ | |
139 | 0x0000ffff, /* dst_mask */ | |
140 | false), /* pcrel_offset */ | |
141 | ||
142 | /* 32 bit relocation. */ | |
143 | HOWTO (R_MIPS_32, /* type */ | |
144 | 0, /* rightshift */ | |
145 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
146 | 32, /* bitsize */ | |
147 | false, /* pc_relative */ | |
148 | 0, /* bitpos */ | |
149 | complain_overflow_dont, /* complain_on_overflow */ | |
150 | bfd_elf_generic_reloc, /* special_function */ | |
151 | "R_MIPS_32", /* name */ | |
152 | true, /* partial_inplace */ | |
153 | 0xffffffff, /* src_mask */ | |
154 | 0xffffffff, /* dst_mask */ | |
155 | false), /* pcrel_offset */ | |
156 | ||
157 | /* 32 bit symbol relative relocation. */ | |
158 | HOWTO (R_MIPS_REL32, /* type */ | |
159 | 0, /* rightshift */ | |
160 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
161 | 32, /* bitsize */ | |
162 | false, /* pc_relative */ | |
163 | 0, /* bitpos */ | |
164 | complain_overflow_dont, /* complain_on_overflow */ | |
165 | bfd_elf_generic_reloc, /* special_function */ | |
166 | "R_MIPS_REL32", /* name */ | |
167 | true, /* partial_inplace */ | |
168 | 0xffffffff, /* src_mask */ | |
169 | 0xffffffff, /* dst_mask */ | |
170 | false), /* pcrel_offset */ | |
171 | ||
172 | /* 26 bit jump address. */ | |
173 | HOWTO (R_MIPS_26, /* type */ | |
174 | 2, /* rightshift */ | |
175 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
176 | 26, /* bitsize */ | |
177 | false, /* pc_relative */ | |
178 | 0, /* bitpos */ | |
179 | complain_overflow_dont, /* complain_on_overflow */ | |
180 | /* This needs complex overflow | |
181 | detection, because the upper four | |
182 | bits must match the PC + 4. */ | |
183 | bfd_elf_generic_reloc, /* special_function */ | |
184 | "R_MIPS_26", /* name */ | |
185 | true, /* partial_inplace */ | |
186 | 0x03ffffff, /* src_mask */ | |
187 | 0x03ffffff, /* dst_mask */ | |
188 | false), /* pcrel_offset */ | |
189 | ||
190 | /* High 16 bits of symbol value. */ | |
191 | HOWTO (R_MIPS_HI16, /* type */ | |
192 | 0, /* rightshift */ | |
193 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
194 | 16, /* bitsize */ | |
195 | false, /* pc_relative */ | |
196 | 0, /* bitpos */ | |
197 | complain_overflow_dont, /* complain_on_overflow */ | |
c6e90b02 | 198 | mips_elf_hi16_reloc, /* special_function */ |
d75bc93d TS |
199 | "R_MIPS_HI16", /* name */ |
200 | true, /* partial_inplace */ | |
201 | 0x0000ffff, /* src_mask */ | |
202 | 0x0000ffff, /* dst_mask */ | |
203 | false), /* pcrel_offset */ | |
204 | ||
205 | /* Low 16 bits of symbol value. */ | |
206 | HOWTO (R_MIPS_LO16, /* type */ | |
207 | 0, /* rightshift */ | |
208 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
209 | 16, /* bitsize */ | |
210 | false, /* pc_relative */ | |
211 | 0, /* bitpos */ | |
212 | complain_overflow_dont, /* complain_on_overflow */ | |
c6e90b02 | 213 | mips_elf_lo16_reloc, /* special_function */ |
d75bc93d TS |
214 | "R_MIPS_LO16", /* name */ |
215 | true, /* partial_inplace */ | |
216 | 0x0000ffff, /* src_mask */ | |
217 | 0x0000ffff, /* dst_mask */ | |
218 | false), /* pcrel_offset */ | |
219 | ||
220 | /* GP relative reference. */ | |
221 | HOWTO (R_MIPS_GPREL16, /* type */ | |
222 | 0, /* rightshift */ | |
223 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
224 | 16, /* bitsize */ | |
225 | false, /* pc_relative */ | |
226 | 0, /* bitpos */ | |
227 | complain_overflow_signed, /* complain_on_overflow */ | |
c6e90b02 | 228 | _bfd_mips_elf32_gprel16_reloc, /* special_function */ |
d75bc93d TS |
229 | "R_MIPS_GPREL16", /* name */ |
230 | true, /* partial_inplace */ | |
231 | 0x0000ffff, /* src_mask */ | |
232 | 0x0000ffff, /* dst_mask */ | |
233 | false), /* pcrel_offset */ | |
234 | ||
235 | /* Reference to literal section. */ | |
236 | HOWTO (R_MIPS_LITERAL, /* type */ | |
237 | 0, /* rightshift */ | |
238 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
239 | 16, /* bitsize */ | |
240 | false, /* pc_relative */ | |
241 | 0, /* bitpos */ | |
242 | complain_overflow_signed, /* complain_on_overflow */ | |
c6e90b02 | 243 | _bfd_mips_elf32_gprel16_reloc, /* special_function */ |
d75bc93d TS |
244 | "R_MIPS_LITERAL", /* name */ |
245 | true, /* partial_inplace */ | |
246 | 0x0000ffff, /* src_mask */ | |
247 | 0x0000ffff, /* dst_mask */ | |
248 | false), /* pcrel_offset */ | |
249 | ||
250 | /* Reference to global offset table. */ | |
251 | HOWTO (R_MIPS_GOT16, /* type */ | |
252 | 0, /* rightshift */ | |
253 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
254 | 16, /* bitsize */ | |
255 | false, /* pc_relative */ | |
256 | 0, /* bitpos */ | |
257 | complain_overflow_signed, /* complain_on_overflow */ | |
c6e90b02 | 258 | mips_elf_got16_reloc, /* special_function */ |
d75bc93d TS |
259 | "R_MIPS_GOT16", /* name */ |
260 | true, /* partial_inplace */ | |
261 | 0x0000ffff, /* src_mask */ | |
262 | 0x0000ffff, /* dst_mask */ | |
263 | false), /* pcrel_offset */ | |
264 | ||
265 | /* 16 bit PC relative reference. */ | |
266 | HOWTO (R_MIPS_PC16, /* type */ | |
267 | 0, /* rightshift */ | |
268 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
269 | 16, /* bitsize */ | |
270 | true, /* pc_relative */ | |
271 | 0, /* bitpos */ | |
272 | complain_overflow_signed, /* complain_on_overflow */ | |
273 | bfd_elf_generic_reloc, /* special_function */ | |
274 | "R_MIPS_PC16", /* name */ | |
275 | true, /* partial_inplace */ | |
276 | 0x0000ffff, /* src_mask */ | |
277 | 0x0000ffff, /* dst_mask */ | |
278 | true), /* pcrel_offset */ | |
279 | ||
280 | /* 16 bit call through global offset table. */ | |
281 | HOWTO (R_MIPS_CALL16, /* type */ | |
282 | 0, /* rightshift */ | |
283 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
284 | 16, /* bitsize */ | |
285 | false, /* pc_relative */ | |
286 | 0, /* bitpos */ | |
287 | complain_overflow_signed, /* complain_on_overflow */ | |
288 | bfd_elf_generic_reloc, /* special_function */ | |
289 | "R_MIPS_CALL16", /* name */ | |
290 | true, /* partial_inplace */ | |
291 | 0x0000ffff, /* src_mask */ | |
292 | 0x0000ffff, /* dst_mask */ | |
293 | false), /* pcrel_offset */ | |
294 | ||
295 | /* 32 bit GP relative reference. */ | |
296 | HOWTO (R_MIPS_GPREL32, /* type */ | |
297 | 0, /* rightshift */ | |
298 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
299 | 32, /* bitsize */ | |
300 | false, /* pc_relative */ | |
301 | 0, /* bitpos */ | |
302 | complain_overflow_dont, /* complain_on_overflow */ | |
c6e90b02 | 303 | mips_elf_gprel32_reloc, /* special_function */ |
d75bc93d TS |
304 | "R_MIPS_GPREL32", /* name */ |
305 | true, /* partial_inplace */ | |
306 | 0xffffffff, /* src_mask */ | |
307 | 0xffffffff, /* dst_mask */ | |
308 | false), /* pcrel_offset */ | |
309 | ||
310 | /* The remaining relocs are defined on Irix 5, although they are | |
311 | not defined by the ABI. */ | |
312 | EMPTY_HOWTO (13), | |
313 | EMPTY_HOWTO (14), | |
314 | EMPTY_HOWTO (15), | |
315 | ||
316 | /* A 5 bit shift field. */ | |
317 | HOWTO (R_MIPS_SHIFT5, /* type */ | |
318 | 0, /* rightshift */ | |
319 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
320 | 5, /* bitsize */ | |
321 | false, /* pc_relative */ | |
322 | 6, /* bitpos */ | |
323 | complain_overflow_bitfield, /* complain_on_overflow */ | |
324 | bfd_elf_generic_reloc, /* special_function */ | |
325 | "R_MIPS_SHIFT5", /* name */ | |
326 | true, /* partial_inplace */ | |
327 | 0x000007c0, /* src_mask */ | |
328 | 0x000007c0, /* dst_mask */ | |
329 | false), /* pcrel_offset */ | |
330 | ||
331 | /* A 6 bit shift field. */ | |
332 | /* FIXME: This is not handled correctly; a special function is | |
333 | needed to put the most significant bit in the right place. */ | |
334 | HOWTO (R_MIPS_SHIFT6, /* type */ | |
335 | 0, /* rightshift */ | |
336 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
337 | 6, /* bitsize */ | |
338 | false, /* pc_relative */ | |
339 | 6, /* bitpos */ | |
340 | complain_overflow_bitfield, /* complain_on_overflow */ | |
341 | bfd_elf_generic_reloc, /* special_function */ | |
342 | "R_MIPS_SHIFT6", /* name */ | |
343 | true, /* partial_inplace */ | |
344 | 0x000007c4, /* src_mask */ | |
345 | 0x000007c4, /* dst_mask */ | |
346 | false), /* pcrel_offset */ | |
347 | ||
348 | /* A 64 bit relocation. */ | |
349 | HOWTO (R_MIPS_64, /* type */ | |
350 | 0, /* rightshift */ | |
351 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
352 | 64, /* bitsize */ | |
353 | false, /* pc_relative */ | |
354 | 0, /* bitpos */ | |
355 | complain_overflow_dont, /* complain_on_overflow */ | |
356 | mips32_64bit_reloc, /* special_function */ | |
357 | "R_MIPS_64", /* name */ | |
358 | true, /* partial_inplace */ | |
359 | MINUS_ONE, /* src_mask */ | |
360 | MINUS_ONE, /* dst_mask */ | |
361 | false), /* pcrel_offset */ | |
362 | ||
363 | /* Displacement in the global offset table. */ | |
364 | HOWTO (R_MIPS_GOT_DISP, /* type */ | |
365 | 0, /* rightshift */ | |
366 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
367 | 16, /* bitsize */ | |
368 | false, /* pc_relative */ | |
369 | 0, /* bitpos */ | |
370 | complain_overflow_signed, /* complain_on_overflow */ | |
371 | bfd_elf_generic_reloc, /* special_function */ | |
372 | "R_MIPS_GOT_DISP", /* name */ | |
373 | true, /* partial_inplace */ | |
374 | 0x0000ffff, /* src_mask */ | |
375 | 0x0000ffff, /* dst_mask */ | |
376 | false), /* pcrel_offset */ | |
377 | ||
378 | /* Displacement to page pointer in the global offset table. */ | |
379 | HOWTO (R_MIPS_GOT_PAGE, /* type */ | |
380 | 0, /* rightshift */ | |
381 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
382 | 16, /* bitsize */ | |
383 | false, /* pc_relative */ | |
384 | 0, /* bitpos */ | |
385 | complain_overflow_signed, /* complain_on_overflow */ | |
386 | bfd_elf_generic_reloc, /* special_function */ | |
387 | "R_MIPS_GOT_PAGE", /* name */ | |
388 | true, /* partial_inplace */ | |
389 | 0x0000ffff, /* src_mask */ | |
390 | 0x0000ffff, /* dst_mask */ | |
391 | false), /* pcrel_offset */ | |
392 | ||
393 | /* Offset from page pointer in the global offset table. */ | |
394 | HOWTO (R_MIPS_GOT_OFST, /* type */ | |
395 | 0, /* rightshift */ | |
396 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
397 | 16, /* bitsize */ | |
398 | false, /* pc_relative */ | |
399 | 0, /* bitpos */ | |
400 | complain_overflow_signed, /* complain_on_overflow */ | |
401 | bfd_elf_generic_reloc, /* special_function */ | |
402 | "R_MIPS_GOT_OFST", /* name */ | |
403 | true, /* partial_inplace */ | |
404 | 0x0000ffff, /* src_mask */ | |
405 | 0x0000ffff, /* dst_mask */ | |
406 | false), /* pcrel_offset */ | |
407 | ||
408 | /* High 16 bits of displacement in global offset table. */ | |
409 | HOWTO (R_MIPS_GOT_HI16, /* type */ | |
410 | 0, /* rightshift */ | |
411 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
412 | 16, /* bitsize */ | |
413 | false, /* pc_relative */ | |
414 | 0, /* bitpos */ | |
415 | complain_overflow_dont, /* complain_on_overflow */ | |
416 | bfd_elf_generic_reloc, /* special_function */ | |
417 | "R_MIPS_GOT_HI16", /* name */ | |
418 | true, /* partial_inplace */ | |
419 | 0x0000ffff, /* src_mask */ | |
420 | 0x0000ffff, /* dst_mask */ | |
421 | false), /* pcrel_offset */ | |
422 | ||
423 | /* Low 16 bits of displacement in global offset table. */ | |
424 | HOWTO (R_MIPS_GOT_LO16, /* type */ | |
425 | 0, /* rightshift */ | |
426 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
427 | 16, /* bitsize */ | |
428 | false, /* pc_relative */ | |
429 | 0, /* bitpos */ | |
430 | complain_overflow_dont, /* complain_on_overflow */ | |
431 | bfd_elf_generic_reloc, /* special_function */ | |
432 | "R_MIPS_GOT_LO16", /* name */ | |
433 | true, /* partial_inplace */ | |
434 | 0x0000ffff, /* src_mask */ | |
435 | 0x0000ffff, /* dst_mask */ | |
436 | false), /* pcrel_offset */ | |
437 | ||
438 | /* 64 bit subtraction. Used in the N32 ABI. */ | |
439 | HOWTO (R_MIPS_SUB, /* type */ | |
440 | 0, /* rightshift */ | |
441 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
442 | 64, /* bitsize */ | |
443 | false, /* pc_relative */ | |
444 | 0, /* bitpos */ | |
445 | complain_overflow_dont, /* complain_on_overflow */ | |
446 | bfd_elf_generic_reloc, /* special_function */ | |
447 | "R_MIPS_SUB", /* name */ | |
448 | true, /* partial_inplace */ | |
449 | MINUS_ONE, /* src_mask */ | |
450 | MINUS_ONE, /* dst_mask */ | |
451 | false), /* pcrel_offset */ | |
452 | ||
453 | /* Used to cause the linker to insert and delete instructions? */ | |
454 | EMPTY_HOWTO (R_MIPS_INSERT_A), | |
455 | EMPTY_HOWTO (R_MIPS_INSERT_B), | |
456 | EMPTY_HOWTO (R_MIPS_DELETE), | |
457 | ||
458 | /* Get the higher value of a 64 bit addend. */ | |
459 | HOWTO (R_MIPS_HIGHER, /* type */ | |
460 | 0, /* rightshift */ | |
461 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
462 | 16, /* bitsize */ | |
463 | false, /* pc_relative */ | |
464 | 0, /* bitpos */ | |
465 | complain_overflow_dont, /* complain_on_overflow */ | |
466 | bfd_elf_generic_reloc, /* special_function */ | |
467 | "R_MIPS_HIGHER", /* name */ | |
468 | true, /* partial_inplace */ | |
469 | 0x0000ffff, /* src_mask */ | |
470 | 0x0000ffff, /* dst_mask */ | |
471 | false), /* pcrel_offset */ | |
472 | ||
473 | /* Get the highest value of a 64 bit addend. */ | |
474 | HOWTO (R_MIPS_HIGHEST, /* type */ | |
475 | 0, /* rightshift */ | |
476 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
477 | 16, /* bitsize */ | |
478 | false, /* pc_relative */ | |
479 | 0, /* bitpos */ | |
480 | complain_overflow_dont, /* complain_on_overflow */ | |
481 | bfd_elf_generic_reloc, /* special_function */ | |
482 | "R_MIPS_HIGHEST", /* name */ | |
483 | true, /* partial_inplace */ | |
484 | 0x0000ffff, /* src_mask */ | |
485 | 0x0000ffff, /* dst_mask */ | |
486 | false), /* pcrel_offset */ | |
487 | ||
488 | /* High 16 bits of displacement in global offset table. */ | |
489 | HOWTO (R_MIPS_CALL_HI16, /* type */ | |
490 | 0, /* rightshift */ | |
491 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
492 | 16, /* bitsize */ | |
493 | false, /* pc_relative */ | |
494 | 0, /* bitpos */ | |
495 | complain_overflow_dont, /* complain_on_overflow */ | |
496 | bfd_elf_generic_reloc, /* special_function */ | |
497 | "R_MIPS_CALL_HI16", /* name */ | |
498 | true, /* partial_inplace */ | |
499 | 0x0000ffff, /* src_mask */ | |
500 | 0x0000ffff, /* dst_mask */ | |
501 | false), /* pcrel_offset */ | |
502 | ||
503 | /* Low 16 bits of displacement in global offset table. */ | |
504 | HOWTO (R_MIPS_CALL_LO16, /* type */ | |
505 | 0, /* rightshift */ | |
506 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
507 | 16, /* bitsize */ | |
508 | false, /* pc_relative */ | |
509 | 0, /* bitpos */ | |
510 | complain_overflow_dont, /* complain_on_overflow */ | |
511 | bfd_elf_generic_reloc, /* special_function */ | |
512 | "R_MIPS_CALL_LO16", /* name */ | |
513 | true, /* partial_inplace */ | |
514 | 0x0000ffff, /* src_mask */ | |
515 | 0x0000ffff, /* dst_mask */ | |
516 | false), /* pcrel_offset */ | |
517 | ||
518 | /* Section displacement. */ | |
519 | HOWTO (R_MIPS_SCN_DISP, /* type */ | |
520 | 0, /* rightshift */ | |
521 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
522 | 32, /* bitsize */ | |
523 | false, /* pc_relative */ | |
524 | 0, /* bitpos */ | |
525 | complain_overflow_dont, /* complain_on_overflow */ | |
526 | bfd_elf_generic_reloc, /* special_function */ | |
527 | "R_MIPS_SCN_DISP", /* name */ | |
528 | true, /* partial_inplace */ | |
529 | 0xffffffff, /* src_mask */ | |
530 | 0xffffffff, /* dst_mask */ | |
531 | false), /* pcrel_offset */ | |
532 | ||
533 | EMPTY_HOWTO (R_MIPS_REL16), | |
534 | EMPTY_HOWTO (R_MIPS_ADD_IMMEDIATE), | |
535 | EMPTY_HOWTO (R_MIPS_PJUMP), | |
536 | EMPTY_HOWTO (R_MIPS_RELGOT), | |
537 | ||
538 | /* Protected jump conversion. This is an optimization hint. No | |
539 | relocation is required for correctness. */ | |
540 | HOWTO (R_MIPS_JALR, /* type */ | |
541 | 0, /* rightshift */ | |
542 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
543 | 32, /* bitsize */ | |
544 | false, /* pc_relative */ | |
545 | 0, /* bitpos */ | |
546 | complain_overflow_dont, /* complain_on_overflow */ | |
547 | bfd_elf_generic_reloc, /* special_function */ | |
548 | "R_MIPS_JALR", /* name */ | |
549 | false, /* partial_inplace */ | |
550 | 0x00000000, /* src_mask */ | |
551 | 0x00000000, /* dst_mask */ | |
552 | false), /* pcrel_offset */ | |
553 | }; | |
554 | ||
c6e90b02 TS |
555 | /* The reloc used for BFD_RELOC_CTOR when doing a 64 bit link. This |
556 | is a hack to make the linker think that we need 64 bit values. */ | |
557 | static reloc_howto_type elf_mips_ctor64_howto = | |
558 | HOWTO (R_MIPS_64, /* type */ | |
252b5132 | 559 | 0, /* rightshift */ |
c6e90b02 | 560 | 4, /* size (0 = byte, 1 = short, 2 = long) */ |
252b5132 RH |
561 | 32, /* bitsize */ |
562 | false, /* pc_relative */ | |
563 | 0, /* bitpos */ | |
c6e90b02 TS |
564 | complain_overflow_signed, /* complain_on_overflow */ |
565 | mips32_64bit_reloc, /* special_function */ | |
566 | "R_MIPS_64", /* name */ | |
567 | true, /* partial_inplace */ | |
568 | 0xffffffff, /* src_mask */ | |
252b5132 | 569 | 0xffffffff, /* dst_mask */ |
c6e90b02 | 570 | false); /* pcrel_offset */ |
252b5132 | 571 | |
c6e90b02 TS |
572 | /* The reloc used for the mips16 jump instruction. */ |
573 | static reloc_howto_type elf_mips16_jump_howto = | |
574 | HOWTO (R_MIPS16_26, /* type */ | |
252b5132 RH |
575 | 2, /* rightshift */ |
576 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
577 | 26, /* bitsize */ | |
578 | false, /* pc_relative */ | |
579 | 0, /* bitpos */ | |
580 | complain_overflow_dont, /* complain_on_overflow */ | |
c6e90b02 TS |
581 | /* This needs complex overflow |
582 | detection, because the upper four | |
583 | bits must match the PC. */ | |
584 | mips16_jump_reloc, /* special_function */ | |
585 | "R_MIPS16_26", /* name */ | |
586 | true, /* partial_inplace */ | |
587 | 0x3ffffff, /* src_mask */ | |
588 | 0x3ffffff, /* dst_mask */ | |
589 | false); /* pcrel_offset */ | |
252b5132 | 590 | |
c6e90b02 TS |
591 | /* The reloc used for the mips16 gprel instruction. */ |
592 | static reloc_howto_type elf_mips16_gprel_howto = | |
593 | HOWTO (R_MIPS16_GPREL, /* type */ | |
252b5132 RH |
594 | 0, /* rightshift */ |
595 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
596 | 16, /* bitsize */ | |
597 | false, /* pc_relative */ | |
598 | 0, /* bitpos */ | |
c6e90b02 TS |
599 | complain_overflow_signed, /* complain_on_overflow */ |
600 | mips16_gprel_reloc, /* special_function */ | |
601 | "R_MIPS16_GPREL", /* name */ | |
602 | true, /* partial_inplace */ | |
603 | 0x07ff001f, /* src_mask */ | |
604 | 0x07ff001f, /* dst_mask */ | |
605 | false); /* pcrel_offset */ | |
252b5132 | 606 | |
c6e90b02 TS |
607 | /* GNU extensions for embedded-pic. */ |
608 | /* High 16 bits of symbol value, pc-relative. */ | |
609 | static reloc_howto_type elf_mips_gnu_rel_hi16 = | |
610 | HOWTO (R_MIPS_GNU_REL_HI16, /* type */ | |
252b5132 RH |
611 | 0, /* rightshift */ |
612 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
613 | 16, /* bitsize */ | |
c6e90b02 | 614 | true, /* pc_relative */ |
252b5132 RH |
615 | 0, /* bitpos */ |
616 | complain_overflow_dont, /* complain_on_overflow */ | |
c6e90b02 TS |
617 | mips_elf_hi16_reloc, /* special_function */ |
618 | "R_MIPS_GNU_REL_HI16", /* name */ | |
619 | true, /* partial_inplace */ | |
620 | 0xffff, /* src_mask */ | |
621 | 0xffff, /* dst_mask */ | |
622 | true); /* pcrel_offset */ | |
252b5132 | 623 | |
c6e90b02 TS |
624 | /* Low 16 bits of symbol value, pc-relative. */ |
625 | static reloc_howto_type elf_mips_gnu_rel_lo16 = | |
626 | HOWTO (R_MIPS_GNU_REL_LO16, /* type */ | |
252b5132 RH |
627 | 0, /* rightshift */ |
628 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
629 | 16, /* bitsize */ | |
c6e90b02 | 630 | true, /* pc_relative */ |
252b5132 | 631 | 0, /* bitpos */ |
c6e90b02 TS |
632 | complain_overflow_dont, /* complain_on_overflow */ |
633 | mips_elf_lo16_reloc, /* special_function */ | |
634 | "R_MIPS_GNU_REL_LO16", /* name */ | |
635 | true, /* partial_inplace */ | |
636 | 0xffff, /* src_mask */ | |
637 | 0xffff, /* dst_mask */ | |
638 | true); /* pcrel_offset */ | |
252b5132 | 639 | |
c6e90b02 TS |
640 | /* 16 bit offset for pc-relative branches. */ |
641 | static reloc_howto_type elf_mips_gnu_rel16_s2 = | |
642 | HOWTO (R_MIPS_GNU_REL16_S2, /* type */ | |
643 | 2, /* rightshift */ | |
252b5132 RH |
644 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
645 | 16, /* bitsize */ | |
c6e90b02 | 646 | true, /* pc_relative */ |
252b5132 RH |
647 | 0, /* bitpos */ |
648 | complain_overflow_signed, /* complain_on_overflow */ | |
c6e90b02 TS |
649 | bfd_elf_generic_reloc, /* special_function */ |
650 | "R_MIPS_GNU_REL16_S2", /* name */ | |
651 | true, /* partial_inplace */ | |
652 | 0xffff, /* src_mask */ | |
653 | 0xffff, /* dst_mask */ | |
654 | true); /* pcrel_offset */ | |
252b5132 | 655 | |
c6e90b02 TS |
656 | /* 64 bit pc-relative. */ |
657 | static reloc_howto_type elf_mips_gnu_pcrel64 = | |
658 | HOWTO (R_MIPS_PC64, /* type */ | |
252b5132 | 659 | 0, /* rightshift */ |
c6e90b02 TS |
660 | 4, /* size (0 = byte, 1 = short, 2 = long) */ |
661 | 64, /* bitsize */ | |
662 | true, /* pc_relative */ | |
252b5132 RH |
663 | 0, /* bitpos */ |
664 | complain_overflow_signed, /* complain_on_overflow */ | |
c6e90b02 TS |
665 | bfd_elf_generic_reloc, /* special_function */ |
666 | "R_MIPS_PC64", /* name */ | |
667 | true, /* partial_inplace */ | |
668 | MINUS_ONE, /* src_mask */ | |
669 | MINUS_ONE, /* dst_mask */ | |
670 | true); /* pcrel_offset */ | |
252b5132 | 671 | |
c6e90b02 TS |
672 | /* 32 bit pc-relative. */ |
673 | static reloc_howto_type elf_mips_gnu_pcrel32 = | |
674 | HOWTO (R_MIPS_PC32, /* type */ | |
252b5132 RH |
675 | 0, /* rightshift */ |
676 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
c6e90b02 | 677 | 32, /* bitsize */ |
252b5132 RH |
678 | true, /* pc_relative */ |
679 | 0, /* bitpos */ | |
680 | complain_overflow_signed, /* complain_on_overflow */ | |
681 | bfd_elf_generic_reloc, /* special_function */ | |
c6e90b02 TS |
682 | "R_MIPS_PC32", /* name */ |
683 | true, /* partial_inplace */ | |
684 | 0xffffffff, /* src_mask */ | |
685 | 0xffffffff, /* dst_mask */ | |
686 | true); /* pcrel_offset */ | |
252b5132 | 687 | |
c6e90b02 TS |
688 | /* GNU extension to record C++ vtable hierarchy */ |
689 | static reloc_howto_type elf_mips_gnu_vtinherit_howto = | |
690 | HOWTO (R_MIPS_GNU_VTINHERIT, /* type */ | |
252b5132 RH |
691 | 0, /* rightshift */ |
692 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
c6e90b02 | 693 | 0, /* bitsize */ |
252b5132 RH |
694 | false, /* pc_relative */ |
695 | 0, /* bitpos */ | |
c6e90b02 TS |
696 | complain_overflow_dont, /* complain_on_overflow */ |
697 | NULL, /* special_function */ | |
698 | "R_MIPS_GNU_VTINHERIT", /* name */ | |
252b5132 | 699 | false, /* partial_inplace */ |
d75bc93d | 700 | 0, /* src_mask */ |
c6e90b02 TS |
701 | 0, /* dst_mask */ |
702 | false); /* pcrel_offset */ | |
252b5132 | 703 | |
c6e90b02 TS |
704 | /* GNU extension to record C++ vtable member usage */ |
705 | static reloc_howto_type elf_mips_gnu_vtentry_howto = | |
706 | HOWTO (R_MIPS_GNU_VTENTRY, /* type */ | |
252b5132 RH |
707 | 0, /* rightshift */ |
708 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
c6e90b02 | 709 | 0, /* bitsize */ |
252b5132 RH |
710 | false, /* pc_relative */ |
711 | 0, /* bitpos */ | |
712 | complain_overflow_dont, /* complain_on_overflow */ | |
c6e90b02 TS |
713 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ |
714 | "R_MIPS_GNU_VTENTRY", /* name */ | |
d75bc93d TS |
715 | false, /* partial_inplace */ |
716 | 0, /* src_mask */ | |
c6e90b02 TS |
717 | 0, /* dst_mask */ |
718 | false); /* pcrel_offset */ | |
252b5132 RH |
719 | |
720 | /* Do a R_MIPS_HI16 relocation. This has to be done in combination | |
c6e90b02 TS |
721 | with a R_MIPS_LO16 reloc, because there is a carry from the LO16 to |
722 | the HI16. Here we just save the information we need; we do the | |
723 | actual relocation when we see the LO16. | |
c6142e5d | 724 | |
c6e90b02 TS |
725 | MIPS ELF requires that the LO16 immediately follow the HI16. As a |
726 | GNU extension, for non-pc-relative relocations, we permit an | |
727 | arbitrary number of HI16 relocs to be associated with a single LO16 | |
728 | reloc. This extension permits gcc to output the HI and LO relocs | |
729 | itself. | |
c6142e5d | 730 | |
c6e90b02 TS |
731 | This cannot be done for PC-relative relocations because both the HI16 |
732 | and LO16 parts of the relocations must be done relative to the LO16 | |
733 | part, and there can be carry to or borrow from the HI16 part. */ | |
103186c6 | 734 | |
c6e90b02 | 735 | struct mips_hi16 |
103186c6 | 736 | { |
c6e90b02 TS |
737 | struct mips_hi16 *next; |
738 | bfd_byte *addr; | |
739 | bfd_vma addend; | |
740 | }; | |
be3ccd9c | 741 | |
c6e90b02 | 742 | /* FIXME: This should not be a static variable. */ |
103186c6 | 743 | |
c6e90b02 | 744 | static struct mips_hi16 *mips_hi16_list; |
252b5132 | 745 | |
c6e90b02 TS |
746 | static bfd_reloc_status_type |
747 | mips_elf_hi16_reloc (abfd, reloc_entry, symbol, data, input_section, | |
748 | output_bfd, error_message) | |
749 | bfd *abfd ATTRIBUTE_UNUSED; | |
750 | arelent *reloc_entry; | |
751 | asymbol *symbol; | |
752 | PTR data; | |
753 | asection *input_section; | |
754 | bfd *output_bfd; | |
755 | char **error_message; | |
252b5132 | 756 | { |
c6e90b02 TS |
757 | bfd_reloc_status_type ret; |
758 | bfd_vma relocation; | |
759 | struct mips_hi16 *n; | |
252b5132 | 760 | |
cb7394f2 | 761 | /* If we're relocating, and this is an external symbol, we don't want |
c6e90b02 TS |
762 | to change anything. */ |
763 | if (output_bfd != (bfd *) NULL | |
764 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
765 | && reloc_entry->addend == 0) | |
252b5132 | 766 | { |
c6e90b02 TS |
767 | reloc_entry->address += input_section->output_offset; |
768 | return bfd_reloc_ok; | |
252b5132 | 769 | } |
252b5132 | 770 | |
c6e90b02 | 771 | ret = bfd_reloc_ok; |
252b5132 | 772 | |
c6e90b02 TS |
773 | if (strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0) |
774 | { | |
775 | boolean relocateable; | |
776 | bfd_vma gp; | |
252b5132 | 777 | |
c6e90b02 TS |
778 | if (ret == bfd_reloc_undefined) |
779 | abort (); | |
252b5132 | 780 | |
c6e90b02 TS |
781 | if (output_bfd != NULL) |
782 | relocateable = true; | |
252b5132 | 783 | else |
252b5132 | 784 | { |
c6e90b02 TS |
785 | relocateable = false; |
786 | output_bfd = symbol->section->output_section->owner; | |
252b5132 RH |
787 | } |
788 | ||
c6e90b02 TS |
789 | ret = mips_elf_final_gp (output_bfd, symbol, relocateable, |
790 | error_message, &gp); | |
791 | if (ret != bfd_reloc_ok) | |
792 | return ret; | |
252b5132 | 793 | |
c6e90b02 | 794 | relocation = gp - reloc_entry->address; |
252b5132 RH |
795 | } |
796 | else | |
797 | { | |
c6e90b02 TS |
798 | if (bfd_is_und_section (symbol->section) |
799 | && output_bfd == (bfd *) NULL) | |
800 | ret = bfd_reloc_undefined; | |
252b5132 | 801 | |
c6e90b02 TS |
802 | if (bfd_is_com_section (symbol->section)) |
803 | relocation = 0; | |
252b5132 | 804 | else |
c6e90b02 TS |
805 | relocation = symbol->value; |
806 | } | |
252b5132 | 807 | |
c6e90b02 TS |
808 | relocation += symbol->section->output_section->vma; |
809 | relocation += symbol->section->output_offset; | |
810 | relocation += reloc_entry->addend; | |
9117d219 | 811 | |
c6e90b02 TS |
812 | if (reloc_entry->address > input_section->_cooked_size) |
813 | return bfd_reloc_outofrange; | |
9117d219 | 814 | |
c6e90b02 TS |
815 | /* Save the information, and let LO16 do the actual relocation. */ |
816 | n = (struct mips_hi16 *) bfd_malloc ((bfd_size_type) sizeof *n); | |
817 | if (n == NULL) | |
818 | return bfd_reloc_outofrange; | |
819 | n->addr = (bfd_byte *) data + reloc_entry->address; | |
820 | n->addend = relocation; | |
821 | n->next = mips_hi16_list; | |
822 | mips_hi16_list = n; | |
252b5132 | 823 | |
c6e90b02 TS |
824 | if (output_bfd != (bfd *) NULL) |
825 | reloc_entry->address += input_section->output_offset; | |
252b5132 | 826 | |
c6e90b02 | 827 | return ret; |
252b5132 RH |
828 | } |
829 | ||
c6e90b02 TS |
830 | /* Do a R_MIPS_LO16 relocation. This is a straightforward 16 bit |
831 | inplace relocation; this function exists in order to do the | |
832 | R_MIPS_HI16 relocation described above. */ | |
252b5132 | 833 | |
c6e90b02 TS |
834 | static bfd_reloc_status_type |
835 | mips_elf_lo16_reloc (abfd, reloc_entry, symbol, data, input_section, | |
836 | output_bfd, error_message) | |
252b5132 | 837 | bfd *abfd; |
c6e90b02 TS |
838 | arelent *reloc_entry; |
839 | asymbol *symbol; | |
840 | PTR data; | |
841 | asection *input_section; | |
842 | bfd *output_bfd; | |
843 | char **error_message; | |
252b5132 | 844 | { |
c6e90b02 | 845 | arelent gp_disp_relent; |
252b5132 | 846 | |
c6e90b02 | 847 | if (mips_hi16_list != NULL) |
252b5132 | 848 | { |
c6e90b02 | 849 | struct mips_hi16 *l; |
252b5132 | 850 | |
c6e90b02 TS |
851 | l = mips_hi16_list; |
852 | while (l != NULL) | |
853 | { | |
854 | unsigned long insn; | |
855 | unsigned long val; | |
856 | unsigned long vallo; | |
857 | struct mips_hi16 *next; | |
252b5132 | 858 | |
c6e90b02 TS |
859 | /* Do the HI16 relocation. Note that we actually don't need |
860 | to know anything about the LO16 itself, except where to | |
861 | find the low 16 bits of the addend needed by the LO16. */ | |
862 | insn = bfd_get_32 (abfd, l->addr); | |
863 | vallo = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); | |
252b5132 | 864 | |
c6e90b02 TS |
865 | /* The low order 16 bits are always treated as a signed |
866 | value. */ | |
867 | vallo = ((vallo & 0xffff) ^ 0x8000) - 0x8000; | |
868 | val = ((insn & 0xffff) << 16) + vallo; | |
869 | val += l->addend; | |
252b5132 | 870 | |
c6e90b02 TS |
871 | /* If PC-relative, we need to subtract out the address of the LO |
872 | half of the HI/LO. (The actual relocation is relative | |
873 | to that instruction.) */ | |
874 | if (reloc_entry->howto->pc_relative) | |
875 | val -= reloc_entry->address; | |
252b5132 | 876 | |
c6e90b02 TS |
877 | /* At this point, "val" has the value of the combined HI/LO |
878 | pair. If the low order 16 bits (which will be used for | |
879 | the LO16 insn) are negative, then we will need an | |
880 | adjustment for the high order 16 bits. */ | |
881 | val += 0x8000; | |
882 | val = (val >> 16) & 0xffff; | |
252b5132 | 883 | |
c6e90b02 TS |
884 | insn &= ~ (bfd_vma) 0xffff; |
885 | insn |= val; | |
886 | bfd_put_32 (abfd, (bfd_vma) insn, l->addr); | |
8a20f077 | 887 | |
c6e90b02 TS |
888 | if (strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0) |
889 | { | |
890 | gp_disp_relent = *reloc_entry; | |
891 | reloc_entry = &gp_disp_relent; | |
892 | reloc_entry->addend = l->addend; | |
893 | } | |
8a20f077 | 894 | |
c6e90b02 TS |
895 | next = l->next; |
896 | free (l); | |
897 | l = next; | |
898 | } | |
252b5132 | 899 | |
c6e90b02 | 900 | mips_hi16_list = NULL; |
43917054 | 901 | } |
c6e90b02 | 902 | else if (strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0) |
252b5132 | 903 | { |
c6e90b02 TS |
904 | bfd_reloc_status_type ret; |
905 | bfd_vma gp, relocation; | |
252b5132 | 906 | |
c6e90b02 | 907 | /* FIXME: Does this case ever occur? */ |
252b5132 | 908 | |
c6e90b02 TS |
909 | ret = mips_elf_final_gp (output_bfd, symbol, true, error_message, &gp); |
910 | if (ret != bfd_reloc_ok) | |
911 | return ret; | |
252b5132 | 912 | |
c6e90b02 TS |
913 | relocation = gp - reloc_entry->address; |
914 | relocation += symbol->section->output_section->vma; | |
915 | relocation += symbol->section->output_offset; | |
916 | relocation += reloc_entry->addend; | |
252b5132 | 917 | |
c6e90b02 TS |
918 | if (reloc_entry->address > input_section->_cooked_size) |
919 | return bfd_reloc_outofrange; | |
252b5132 | 920 | |
c6e90b02 TS |
921 | gp_disp_relent = *reloc_entry; |
922 | reloc_entry = &gp_disp_relent; | |
923 | reloc_entry->addend = relocation - 4; | |
252b5132 RH |
924 | } |
925 | ||
c6e90b02 TS |
926 | /* Now do the LO16 reloc in the usual way. */ |
927 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, | |
928 | input_section, output_bfd, error_message); | |
252b5132 RH |
929 | } |
930 | ||
c6e90b02 TS |
931 | /* Do a R_MIPS_GOT16 reloc. This is a reloc against the global offset |
932 | table used for PIC code. If the symbol is an external symbol, the | |
933 | instruction is modified to contain the offset of the appropriate | |
934 | entry in the global offset table. If the symbol is a section | |
935 | symbol, the next reloc is a R_MIPS_LO16 reloc. The two 16 bit | |
936 | addends are combined to form the real addend against the section | |
937 | symbol; the GOT16 is modified to contain the offset of an entry in | |
938 | the global offset table, and the LO16 is modified to offset it | |
939 | appropriately. Thus an offset larger than 16 bits requires a | |
940 | modified value in the global offset table. | |
252b5132 | 941 | |
c6e90b02 TS |
942 | This implementation suffices for the assembler, but the linker does |
943 | not yet know how to create global offset tables. */ | |
252b5132 | 944 | |
c6e90b02 TS |
945 | static bfd_reloc_status_type |
946 | mips_elf_got16_reloc (abfd, reloc_entry, symbol, data, input_section, | |
947 | output_bfd, error_message) | |
948 | bfd *abfd; | |
949 | arelent *reloc_entry; | |
950 | asymbol *symbol; | |
951 | PTR data; | |
952 | asection *input_section; | |
252b5132 | 953 | bfd *output_bfd; |
c6e90b02 | 954 | char **error_message; |
252b5132 | 955 | { |
cb7394f2 | 956 | /* If we're relocating, and this is an external symbol, we don't want |
c6e90b02 TS |
957 | to change anything. */ |
958 | if (output_bfd != (bfd *) NULL | |
959 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
960 | && reloc_entry->addend == 0) | |
961 | { | |
962 | reloc_entry->address += input_section->output_offset; | |
963 | return bfd_reloc_ok; | |
964 | } | |
252b5132 | 965 | |
c6e90b02 TS |
966 | /* If we're relocating, and this is a local symbol, we can handle it |
967 | just like HI16. */ | |
968 | if (output_bfd != (bfd *) NULL | |
969 | && (symbol->flags & BSF_SECTION_SYM) != 0) | |
970 | return mips_elf_hi16_reloc (abfd, reloc_entry, symbol, data, | |
971 | input_section, output_bfd, error_message); | |
252b5132 | 972 | |
c6e90b02 | 973 | abort (); |
252b5132 RH |
974 | } |
975 | ||
c6e90b02 TS |
976 | /* Set the GP value for OUTPUT_BFD. Returns false if this is a |
977 | dangerous relocation. */ | |
252b5132 | 978 | |
252b5132 | 979 | static boolean |
c6e90b02 TS |
980 | mips_elf_assign_gp (output_bfd, pgp) |
981 | bfd *output_bfd; | |
982 | bfd_vma *pgp; | |
252b5132 | 983 | { |
c6e90b02 TS |
984 | unsigned int count; |
985 | asymbol **sym; | |
986 | unsigned int i; | |
e92d460e | 987 | |
c6e90b02 TS |
988 | /* If we've already figured out what GP will be, just return it. */ |
989 | *pgp = _bfd_get_gp_value (output_bfd); | |
990 | if (*pgp) | |
991 | return true; | |
992 | ||
993 | count = bfd_get_symcount (output_bfd); | |
994 | sym = bfd_get_outsymbols (output_bfd); | |
252b5132 | 995 | |
c6e90b02 TS |
996 | /* The linker script will have created a symbol named `_gp' with the |
997 | appropriate value. */ | |
998 | if (sym == (asymbol **) NULL) | |
999 | i = count; | |
1000 | else | |
252b5132 | 1001 | { |
c6e90b02 TS |
1002 | for (i = 0; i < count; i++, sym++) |
1003 | { | |
1004 | register const char *name; | |
1005 | ||
1006 | name = bfd_asymbol_name (*sym); | |
1007 | if (*name == '_' && strcmp (name, "_gp") == 0) | |
1008 | { | |
1009 | *pgp = bfd_asymbol_value (*sym); | |
1010 | _bfd_set_gp_value (output_bfd, *pgp); | |
1011 | break; | |
1012 | } | |
1013 | } | |
252b5132 RH |
1014 | } |
1015 | ||
c6e90b02 | 1016 | if (i >= count) |
252b5132 | 1017 | { |
c6e90b02 TS |
1018 | /* Only get the error once. */ |
1019 | *pgp = 4; | |
1020 | _bfd_set_gp_value (output_bfd, *pgp); | |
1021 | return false; | |
252b5132 RH |
1022 | } |
1023 | ||
1024 | return true; | |
1025 | } | |
1026 | ||
c6e90b02 TS |
1027 | /* We have to figure out the gp value, so that we can adjust the |
1028 | symbol value correctly. We look up the symbol _gp in the output | |
1029 | BFD. If we can't find it, we're stuck. We cache it in the ELF | |
1030 | target data. We don't need to adjust the symbol value for an | |
1031 | external symbol if we are producing relocateable output. */ | |
252b5132 | 1032 | |
c6e90b02 TS |
1033 | static bfd_reloc_status_type |
1034 | mips_elf_final_gp (output_bfd, symbol, relocateable, error_message, pgp) | |
252b5132 | 1035 | bfd *output_bfd; |
c6e90b02 TS |
1036 | asymbol *symbol; |
1037 | boolean relocateable; | |
1038 | char **error_message; | |
1039 | bfd_vma *pgp; | |
252b5132 | 1040 | { |
c6e90b02 TS |
1041 | if (bfd_is_und_section (symbol->section) |
1042 | && ! relocateable) | |
252b5132 | 1043 | { |
c6e90b02 TS |
1044 | *pgp = 0; |
1045 | return bfd_reloc_undefined; | |
252b5132 RH |
1046 | } |
1047 | ||
c6e90b02 TS |
1048 | *pgp = _bfd_get_gp_value (output_bfd); |
1049 | if (*pgp == 0 | |
1050 | && (! relocateable | |
1051 | || (symbol->flags & BSF_SECTION_SYM) != 0)) | |
252b5132 | 1052 | { |
c6e90b02 | 1053 | if (relocateable) |
252b5132 | 1054 | { |
c6e90b02 TS |
1055 | /* Make up a value. */ |
1056 | *pgp = symbol->section->output_section->vma + 0x4000; | |
1057 | _bfd_set_gp_value (output_bfd, *pgp); | |
252b5132 | 1058 | } |
c6e90b02 | 1059 | else if (!mips_elf_assign_gp (output_bfd, pgp)) |
252b5132 | 1060 | { |
c6e90b02 TS |
1061 | *error_message = |
1062 | (char *) _("GP relative relocation when _gp not defined"); | |
1063 | return bfd_reloc_dangerous; | |
252b5132 | 1064 | } |
252b5132 RH |
1065 | } |
1066 | ||
c6e90b02 TS |
1067 | return bfd_reloc_ok; |
1068 | } | |
252b5132 | 1069 | |
c6e90b02 TS |
1070 | /* Do a R_MIPS_GPREL16 relocation. This is a 16 bit value which must |
1071 | become the offset from the gp register. This function also handles | |
1072 | R_MIPS_LITERAL relocations, although those can be handled more | |
1073 | cleverly because the entries in the .lit8 and .lit4 sections can be | |
1074 | merged. */ | |
252b5132 | 1075 | |
c6e90b02 TS |
1076 | bfd_reloc_status_type |
1077 | _bfd_mips_elf32_gprel16_reloc (abfd, reloc_entry, symbol, data, input_section, | |
1078 | output_bfd, error_message) | |
1079 | bfd *abfd; | |
1080 | arelent *reloc_entry; | |
1081 | asymbol *symbol; | |
1082 | PTR data; | |
1083 | asection *input_section; | |
1084 | bfd *output_bfd; | |
1085 | char **error_message; | |
1086 | { | |
1087 | boolean relocateable; | |
1088 | bfd_reloc_status_type ret; | |
1089 | bfd_vma gp; | |
252b5132 | 1090 | |
c6e90b02 TS |
1091 | /* If we're relocating, and this is an external symbol with no |
1092 | addend, we don't want to change anything. We will only have an | |
1093 | addend if this is a newly created reloc, not read from an ELF | |
1094 | file. */ | |
1095 | if (output_bfd != (bfd *) NULL | |
1096 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
1097 | && reloc_entry->addend == 0) | |
1098 | { | |
1099 | reloc_entry->address += input_section->output_offset; | |
1100 | return bfd_reloc_ok; | |
1101 | } | |
252b5132 | 1102 | |
c6e90b02 TS |
1103 | if (output_bfd != (bfd *) NULL) |
1104 | relocateable = true; | |
1105 | else | |
1106 | { | |
1107 | relocateable = false; | |
1108 | output_bfd = symbol->section->output_section->owner; | |
1109 | } | |
252b5132 | 1110 | |
c6e90b02 TS |
1111 | ret = mips_elf_final_gp (output_bfd, symbol, relocateable, error_message, |
1112 | &gp); | |
1113 | if (ret != bfd_reloc_ok) | |
1114 | return ret; | |
252b5132 | 1115 | |
c6e90b02 TS |
1116 | return _bfd_mips_elf_gprel16_with_gp (abfd, symbol, reloc_entry, |
1117 | input_section, relocateable, | |
1118 | data, gp); | |
1119 | } | |
252b5132 | 1120 | |
cb7394f2 TS |
1121 | /* Do a R_MIPS_GPREL32 relocation. This is a 32 bit value which must |
1122 | become the offset from the gp register. */ | |
252b5132 | 1123 | |
c6e90b02 TS |
1124 | static bfd_reloc_status_type gprel32_with_gp PARAMS ((bfd *, asymbol *, |
1125 | arelent *, asection *, | |
1126 | boolean, PTR, bfd_vma)); | |
252b5132 | 1127 | |
c6e90b02 TS |
1128 | static bfd_reloc_status_type |
1129 | mips_elf_gprel32_reloc (abfd, reloc_entry, symbol, data, input_section, | |
1130 | output_bfd, error_message) | |
1131 | bfd *abfd; | |
1132 | arelent *reloc_entry; | |
1133 | asymbol *symbol; | |
1134 | PTR data; | |
1135 | asection *input_section; | |
1136 | bfd *output_bfd; | |
1137 | char **error_message; | |
1138 | { | |
1139 | boolean relocateable; | |
1140 | bfd_reloc_status_type ret; | |
1141 | bfd_vma gp; | |
252b5132 | 1142 | |
c6e90b02 TS |
1143 | /* If we're relocating, and this is an external symbol with no |
1144 | addend, we don't want to change anything. We will only have an | |
1145 | addend if this is a newly created reloc, not read from an ELF | |
1146 | file. */ | |
1147 | if (output_bfd != (bfd *) NULL | |
1148 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
1149 | && reloc_entry->addend == 0) | |
1150 | { | |
1151 | *error_message = (char *) | |
1152 | _("32bits gp relative relocation occurs for an external symbol"); | |
1153 | return bfd_reloc_outofrange; | |
1154 | } | |
252b5132 | 1155 | |
c6e90b02 TS |
1156 | if (output_bfd != (bfd *) NULL) |
1157 | { | |
1158 | relocateable = true; | |
1159 | gp = _bfd_get_gp_value (output_bfd); | |
1160 | } | |
1161 | else | |
1162 | { | |
1163 | relocateable = false; | |
1164 | output_bfd = symbol->section->output_section->owner; | |
252b5132 | 1165 | |
c6e90b02 TS |
1166 | ret = mips_elf_final_gp (output_bfd, symbol, relocateable, |
1167 | error_message, &gp); | |
1168 | if (ret != bfd_reloc_ok) | |
1169 | return ret; | |
1170 | } | |
252b5132 | 1171 | |
c6e90b02 TS |
1172 | return gprel32_with_gp (abfd, symbol, reloc_entry, input_section, |
1173 | relocateable, data, gp); | |
1174 | } | |
252b5132 | 1175 | |
c6e90b02 TS |
1176 | static bfd_reloc_status_type |
1177 | gprel32_with_gp (abfd, symbol, reloc_entry, input_section, relocateable, data, | |
1178 | gp) | |
1179 | bfd *abfd; | |
1180 | asymbol *symbol; | |
1181 | arelent *reloc_entry; | |
1182 | asection *input_section; | |
1183 | boolean relocateable; | |
1184 | PTR data; | |
1185 | bfd_vma gp; | |
1186 | { | |
1187 | bfd_vma relocation; | |
1188 | unsigned long val; | |
252b5132 | 1189 | |
c6e90b02 TS |
1190 | if (bfd_is_com_section (symbol->section)) |
1191 | relocation = 0; | |
1192 | else | |
1193 | relocation = symbol->value; | |
252b5132 | 1194 | |
c6e90b02 TS |
1195 | relocation += symbol->section->output_section->vma; |
1196 | relocation += symbol->section->output_offset; | |
252b5132 | 1197 | |
c6e90b02 TS |
1198 | if (reloc_entry->address > input_section->_cooked_size) |
1199 | return bfd_reloc_outofrange; | |
252b5132 | 1200 | |
c6e90b02 TS |
1201 | if (reloc_entry->howto->src_mask == 0) |
1202 | { | |
1203 | /* This case arises with the 64-bit MIPS ELF ABI. */ | |
1204 | val = 0; | |
1205 | } | |
1206 | else | |
1207 | val = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); | |
252b5132 | 1208 | |
c6e90b02 TS |
1209 | /* Set val to the offset into the section or symbol. */ |
1210 | val += reloc_entry->addend; | |
252b5132 | 1211 | |
c6e90b02 TS |
1212 | /* Adjust val for the final section location and GP value. If we |
1213 | are producing relocateable output, we don't want to do this for | |
1214 | an external symbol. */ | |
1215 | if (! relocateable | |
1216 | || (symbol->flags & BSF_SECTION_SYM) != 0) | |
1217 | val += relocation - gp; | |
252b5132 | 1218 | |
c6e90b02 | 1219 | bfd_put_32 (abfd, (bfd_vma) val, (bfd_byte *) data + reloc_entry->address); |
c6142e5d | 1220 | |
c6e90b02 TS |
1221 | if (relocateable) |
1222 | reloc_entry->address += input_section->output_offset; | |
252b5132 | 1223 | |
c6e90b02 | 1224 | return bfd_reloc_ok; |
252b5132 RH |
1225 | } |
1226 | ||
c6e90b02 TS |
1227 | /* Handle a 64 bit reloc in a 32 bit MIPS ELF file. These are |
1228 | generated when addresses are 64 bits. The upper 32 bits are a simple | |
1229 | sign extension. */ | |
7403cb63 | 1230 | |
c6e90b02 TS |
1231 | static bfd_reloc_status_type |
1232 | mips32_64bit_reloc (abfd, reloc_entry, symbol, data, input_section, | |
1233 | output_bfd, error_message) | |
1234 | bfd *abfd; | |
1235 | arelent *reloc_entry; | |
1236 | asymbol *symbol; | |
1237 | PTR data; | |
1238 | asection *input_section; | |
1239 | bfd *output_bfd; | |
1240 | char **error_message; | |
7403cb63 | 1241 | { |
c6e90b02 TS |
1242 | bfd_reloc_status_type r; |
1243 | arelent reloc32; | |
1244 | unsigned long val; | |
1245 | bfd_size_type addr; | |
7403cb63 | 1246 | |
c6e90b02 TS |
1247 | r = bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
1248 | input_section, output_bfd, error_message); | |
1249 | if (r != bfd_reloc_continue) | |
1250 | return r; | |
be3ccd9c | 1251 | |
c6e90b02 TS |
1252 | /* Do a normal 32 bit relocation on the lower 32 bits. */ |
1253 | reloc32 = *reloc_entry; | |
1254 | if (bfd_big_endian (abfd)) | |
1255 | reloc32.address += 4; | |
1256 | reloc32.howto = &elf_mips_howto_table_rel[R_MIPS_32]; | |
1257 | r = bfd_perform_relocation (abfd, &reloc32, data, input_section, | |
1258 | output_bfd, error_message); | |
be3ccd9c | 1259 | |
c6e90b02 TS |
1260 | /* Sign extend into the upper 32 bits. */ |
1261 | val = bfd_get_32 (abfd, (bfd_byte *) data + reloc32.address); | |
1262 | if ((val & 0x80000000) != 0) | |
1263 | val = 0xffffffff; | |
1264 | else | |
1265 | val = 0; | |
1266 | addr = reloc_entry->address; | |
1267 | if (bfd_little_endian (abfd)) | |
1268 | addr += 4; | |
1269 | bfd_put_32 (abfd, (bfd_vma) val, (bfd_byte *) data + addr); | |
1270 | ||
1271 | return r; | |
7403cb63 MM |
1272 | } |
1273 | ||
c6e90b02 | 1274 | /* Handle a mips16 jump. */ |
252b5132 | 1275 | |
c6e90b02 TS |
1276 | static bfd_reloc_status_type |
1277 | mips16_jump_reloc (abfd, reloc_entry, symbol, data, input_section, | |
1278 | output_bfd, error_message) | |
1279 | bfd *abfd ATTRIBUTE_UNUSED; | |
1280 | arelent *reloc_entry; | |
1281 | asymbol *symbol; | |
1282 | PTR data ATTRIBUTE_UNUSED; | |
1283 | asection *input_section; | |
252b5132 | 1284 | bfd *output_bfd; |
c6e90b02 | 1285 | char **error_message ATTRIBUTE_UNUSED; |
252b5132 | 1286 | { |
c6e90b02 TS |
1287 | if (output_bfd != (bfd *) NULL |
1288 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
1289 | && reloc_entry->addend == 0) | |
252b5132 | 1290 | { |
c6e90b02 TS |
1291 | reloc_entry->address += input_section->output_offset; |
1292 | return bfd_reloc_ok; | |
1293 | } | |
252b5132 | 1294 | |
c6e90b02 TS |
1295 | /* FIXME. */ |
1296 | { | |
1297 | static boolean warned; | |
252b5132 | 1298 | |
c6e90b02 TS |
1299 | if (! warned) |
1300 | (*_bfd_error_handler) | |
1301 | (_("Linking mips16 objects into %s format is not supported"), | |
1302 | bfd_get_target (input_section->output_section->owner)); | |
1303 | warned = true; | |
1304 | } | |
252b5132 | 1305 | |
c6e90b02 TS |
1306 | return bfd_reloc_undefined; |
1307 | } | |
252b5132 | 1308 | |
c6e90b02 | 1309 | /* Handle a mips16 GP relative reloc. */ |
252b5132 | 1310 | |
c6e90b02 TS |
1311 | static bfd_reloc_status_type |
1312 | mips16_gprel_reloc (abfd, reloc_entry, symbol, data, input_section, | |
1313 | output_bfd, error_message) | |
1314 | bfd *abfd; | |
1315 | arelent *reloc_entry; | |
1316 | asymbol *symbol; | |
1317 | PTR data; | |
1318 | asection *input_section; | |
1319 | bfd *output_bfd; | |
1320 | char **error_message; | |
1321 | { | |
1322 | boolean relocateable; | |
1323 | bfd_reloc_status_type ret; | |
1324 | bfd_vma gp; | |
1325 | unsigned short extend, insn; | |
1326 | unsigned long final; | |
252b5132 | 1327 | |
c6e90b02 TS |
1328 | /* If we're relocating, and this is an external symbol with no |
1329 | addend, we don't want to change anything. We will only have an | |
1330 | addend if this is a newly created reloc, not read from an ELF | |
1331 | file. */ | |
1332 | if (output_bfd != NULL | |
1333 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
1334 | && reloc_entry->addend == 0) | |
1335 | { | |
1336 | reloc_entry->address += input_section->output_offset; | |
1337 | return bfd_reloc_ok; | |
1338 | } | |
252b5132 | 1339 | |
c6e90b02 TS |
1340 | if (output_bfd != NULL) |
1341 | relocateable = true; | |
1342 | else | |
1343 | { | |
1344 | relocateable = false; | |
1345 | output_bfd = symbol->section->output_section->owner; | |
252b5132 RH |
1346 | } |
1347 | ||
c6e90b02 TS |
1348 | ret = mips_elf_final_gp (output_bfd, symbol, relocateable, error_message, |
1349 | &gp); | |
1350 | if (ret != bfd_reloc_ok) | |
1351 | return ret; | |
252b5132 | 1352 | |
c6e90b02 TS |
1353 | if (reloc_entry->address > input_section->_cooked_size) |
1354 | return bfd_reloc_outofrange; | |
252b5132 | 1355 | |
c6e90b02 TS |
1356 | /* Pick up the mips16 extend instruction and the real instruction. */ |
1357 | extend = bfd_get_16 (abfd, (bfd_byte *) data + reloc_entry->address); | |
1358 | insn = bfd_get_16 (abfd, (bfd_byte *) data + reloc_entry->address + 2); | |
252b5132 | 1359 | |
c6e90b02 TS |
1360 | /* Stuff the current addend back as a 32 bit value, do the usual |
1361 | relocation, and then clean up. */ | |
1362 | bfd_put_32 (abfd, | |
1363 | (bfd_vma) (((extend & 0x1f) << 11) | |
1364 | | (extend & 0x7e0) | |
1365 | | (insn & 0x1f)), | |
1366 | (bfd_byte *) data + reloc_entry->address); | |
252b5132 | 1367 | |
c6e90b02 TS |
1368 | ret = _bfd_mips_elf_gprel16_with_gp (abfd, symbol, reloc_entry, |
1369 | input_section, relocateable, data, gp); | |
c6142e5d | 1370 | |
c6e90b02 TS |
1371 | final = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); |
1372 | bfd_put_16 (abfd, | |
1373 | (bfd_vma) ((extend & 0xf800) | |
1374 | | ((final >> 11) & 0x1f) | |
1375 | | (final & 0x7e0)), | |
1376 | (bfd_byte *) data + reloc_entry->address); | |
1377 | bfd_put_16 (abfd, | |
1378 | (bfd_vma) ((insn & 0xffe0) | |
1379 | | (final & 0x1f)), | |
1380 | (bfd_byte *) data + reloc_entry->address + 2); | |
252b5132 | 1381 | |
c6e90b02 TS |
1382 | return ret; |
1383 | } | |
7403cb63 | 1384 | |
c6e90b02 | 1385 | /* A mapping from BFD reloc types to MIPS ELF reloc types. */ |
252b5132 | 1386 | |
c6e90b02 | 1387 | struct elf_reloc_map { |
cb7394f2 TS |
1388 | bfd_reloc_code_real_type bfd_val; |
1389 | enum elf_mips_reloc_type elf_val; | |
c6e90b02 | 1390 | }; |
252b5132 | 1391 | |
c6e90b02 TS |
1392 | static const struct elf_reloc_map mips_reloc_map[] = |
1393 | { | |
1394 | { BFD_RELOC_NONE, R_MIPS_NONE, }, | |
1395 | { BFD_RELOC_16, R_MIPS_16 }, | |
1396 | { BFD_RELOC_32, R_MIPS_32 }, | |
cb7394f2 | 1397 | /* There is no BFD reloc for R_MIPS_REL32. */ |
c6e90b02 TS |
1398 | { BFD_RELOC_64, R_MIPS_64 }, |
1399 | { BFD_RELOC_MIPS_JMP, R_MIPS_26 }, | |
1400 | { BFD_RELOC_HI16_S, R_MIPS_HI16 }, | |
1401 | { BFD_RELOC_LO16, R_MIPS_LO16 }, | |
1402 | { BFD_RELOC_GPREL16, R_MIPS_GPREL16 }, | |
1403 | { BFD_RELOC_MIPS_LITERAL, R_MIPS_LITERAL }, | |
1404 | { BFD_RELOC_MIPS_GOT16, R_MIPS_GOT16 }, | |
1405 | { BFD_RELOC_16_PCREL, R_MIPS_PC16 }, | |
1406 | { BFD_RELOC_MIPS_CALL16, R_MIPS_CALL16 }, | |
1407 | { BFD_RELOC_GPREL32, R_MIPS_GPREL32 }, | |
1408 | { BFD_RELOC_MIPS_GOT_HI16, R_MIPS_GOT_HI16 }, | |
1409 | { BFD_RELOC_MIPS_GOT_LO16, R_MIPS_GOT_LO16 }, | |
1410 | { BFD_RELOC_MIPS_CALL_HI16, R_MIPS_CALL_HI16 }, | |
1411 | { BFD_RELOC_MIPS_CALL_LO16, R_MIPS_CALL_LO16 }, | |
1412 | { BFD_RELOC_MIPS_SUB, R_MIPS_SUB }, | |
1413 | { BFD_RELOC_MIPS_GOT_PAGE, R_MIPS_GOT_PAGE }, | |
1414 | { BFD_RELOC_MIPS_GOT_OFST, R_MIPS_GOT_OFST }, | |
1415 | { BFD_RELOC_MIPS_GOT_DISP, R_MIPS_GOT_DISP } | |
1416 | }; | |
252b5132 | 1417 | |
c6e90b02 | 1418 | /* Given a BFD reloc type, return a howto structure. */ |
252b5132 | 1419 | |
c6e90b02 TS |
1420 | static reloc_howto_type * |
1421 | bfd_elf32_bfd_reloc_type_lookup (abfd, code) | |
1422 | bfd *abfd; | |
1423 | bfd_reloc_code_real_type code; | |
252b5132 | 1424 | { |
c6e90b02 | 1425 | unsigned int i; |
cb7394f2 | 1426 | reloc_howto_type *howto_table = elf_mips_howto_table_rel; |
252b5132 | 1427 | |
cb7394f2 TS |
1428 | for (i = 0; i < sizeof (mips_reloc_map) / sizeof (struct elf_reloc_map); |
1429 | i++) | |
252b5132 | 1430 | { |
cb7394f2 TS |
1431 | if (mips_reloc_map[i].bfd_val == code) |
1432 | return &howto_table[(int) mips_reloc_map[i].elf_val]; | |
252b5132 RH |
1433 | } |
1434 | ||
c6e90b02 | 1435 | switch (code) |
252b5132 | 1436 | { |
c6e90b02 TS |
1437 | default: |
1438 | bfd_set_error (bfd_error_bad_value); | |
1439 | return NULL; | |
252b5132 | 1440 | |
c6e90b02 TS |
1441 | case BFD_RELOC_CTOR: |
1442 | /* We need to handle BFD_RELOC_CTOR specially. | |
1443 | Select the right relocation (R_MIPS_32 or R_MIPS_64) based on the | |
1444 | size of addresses on this architecture. */ | |
1445 | if (bfd_arch_bits_per_address (abfd) == 32) | |
cb7394f2 | 1446 | return &howto_table[(int) R_MIPS_32]; |
c6e90b02 TS |
1447 | else |
1448 | return &elf_mips_ctor64_howto; | |
252b5132 | 1449 | |
c6e90b02 TS |
1450 | case BFD_RELOC_MIPS16_JMP: |
1451 | return &elf_mips16_jump_howto; | |
1452 | case BFD_RELOC_MIPS16_GPREL: | |
1453 | return &elf_mips16_gprel_howto; | |
1454 | case BFD_RELOC_VTABLE_INHERIT: | |
1455 | return &elf_mips_gnu_vtinherit_howto; | |
1456 | case BFD_RELOC_VTABLE_ENTRY: | |
1457 | return &elf_mips_gnu_vtentry_howto; | |
1458 | case BFD_RELOC_PCREL_HI16_S: | |
1459 | return &elf_mips_gnu_rel_hi16; | |
1460 | case BFD_RELOC_PCREL_LO16: | |
1461 | return &elf_mips_gnu_rel_lo16; | |
1462 | case BFD_RELOC_16_PCREL_S2: | |
1463 | return &elf_mips_gnu_rel16_s2; | |
1464 | case BFD_RELOC_64_PCREL: | |
1465 | return &elf_mips_gnu_pcrel64; | |
1466 | case BFD_RELOC_32_PCREL: | |
1467 | return &elf_mips_gnu_pcrel32; | |
1468 | } | |
1469 | } | |
252b5132 | 1470 | |
c6e90b02 | 1471 | /* Given a MIPS Elf32_Internal_Rel, fill in an arelent structure. */ |
252b5132 | 1472 | |
c6e90b02 TS |
1473 | static reloc_howto_type * |
1474 | mips_elf32_rtype_to_howto (r_type, rela_p) | |
1475 | unsigned int r_type; | |
1476 | boolean rela_p ATTRIBUTE_UNUSED; | |
1477 | { | |
1478 | switch (r_type) | |
1479 | { | |
1480 | case R_MIPS16_26: | |
1481 | return &elf_mips16_jump_howto; | |
c6e90b02 TS |
1482 | case R_MIPS16_GPREL: |
1483 | return &elf_mips16_gprel_howto; | |
c6e90b02 TS |
1484 | case R_MIPS_GNU_VTINHERIT: |
1485 | return &elf_mips_gnu_vtinherit_howto; | |
c6e90b02 TS |
1486 | case R_MIPS_GNU_VTENTRY: |
1487 | return &elf_mips_gnu_vtentry_howto; | |
c6e90b02 TS |
1488 | case R_MIPS_GNU_REL_HI16: |
1489 | return &elf_mips_gnu_rel_hi16; | |
c6e90b02 TS |
1490 | case R_MIPS_GNU_REL_LO16: |
1491 | return &elf_mips_gnu_rel_lo16; | |
c6e90b02 TS |
1492 | case R_MIPS_GNU_REL16_S2: |
1493 | return &elf_mips_gnu_rel16_s2; | |
c6e90b02 TS |
1494 | case R_MIPS_PC64: |
1495 | return &elf_mips_gnu_pcrel64; | |
c6e90b02 TS |
1496 | case R_MIPS_PC32: |
1497 | return &elf_mips_gnu_pcrel32; | |
c6e90b02 TS |
1498 | default: |
1499 | BFD_ASSERT (r_type < (unsigned int) R_MIPS_max); | |
1500 | return &elf_mips_howto_table_rel[r_type]; | |
1501 | } | |
1502 | } | |
252b5132 | 1503 | |
c6e90b02 | 1504 | /* Given a MIPS Elf32_Internal_Rel, fill in an arelent structure. */ |
252b5132 | 1505 | |
c6e90b02 TS |
1506 | static void |
1507 | mips_info_to_howto_rel (abfd, cache_ptr, dst) | |
1508 | bfd *abfd; | |
1509 | arelent *cache_ptr; | |
1510 | Elf32_Internal_Rel *dst; | |
1511 | { | |
1512 | unsigned int r_type; | |
252b5132 | 1513 | |
c6e90b02 TS |
1514 | r_type = ELF32_R_TYPE (dst->r_info); |
1515 | cache_ptr->howto = mips_elf32_rtype_to_howto (r_type, false); | |
252b5132 | 1516 | |
c6e90b02 TS |
1517 | /* The addend for a GPREL16 or LITERAL relocation comes from the GP |
1518 | value for the object file. We get the addend now, rather than | |
1519 | when we do the relocation, because the symbol manipulations done | |
1520 | by the linker may cause us to lose track of the input BFD. */ | |
1521 | if (((*cache_ptr->sym_ptr_ptr)->flags & BSF_SECTION_SYM) != 0 | |
1522 | && (r_type == (unsigned int) R_MIPS_GPREL16 | |
1523 | || r_type == (unsigned int) R_MIPS_LITERAL)) | |
1524 | cache_ptr->addend = elf_gp (abfd); | |
1525 | } | |
5499724a | 1526 | |
c6e90b02 | 1527 | /* Given a MIPS Elf32_Internal_Rela, fill in an arelent structure. */ |
252b5132 | 1528 | |
c6e90b02 TS |
1529 | static void |
1530 | mips_info_to_howto_rela (abfd, cache_ptr, dst) | |
1531 | bfd *abfd; | |
1532 | arelent *cache_ptr; | |
1533 | Elf32_Internal_Rela *dst; | |
1534 | { | |
1535 | /* Since an Elf32_Internal_Rel is an initial prefix of an | |
1536 | Elf32_Internal_Rela, we can just use mips_info_to_howto_rel | |
1537 | above. */ | |
1538 | mips_info_to_howto_rel (abfd, cache_ptr, (Elf32_Internal_Rel *) dst); | |
252b5132 | 1539 | |
c6e90b02 TS |
1540 | /* If we ever need to do any extra processing with dst->r_addend |
1541 | (the field omitted in an Elf32_Internal_Rel) we can do it here. */ | |
1542 | } | |
1543 | \f | |
1544 | /* Determine whether a symbol is global for the purposes of splitting | |
1545 | the symbol table into global symbols and local symbols. At least | |
1546 | on Irix 5, this split must be between section symbols and all other | |
1547 | symbols. On most ELF targets the split is between static symbols | |
1548 | and externally visible symbols. */ | |
252b5132 | 1549 | |
c6e90b02 TS |
1550 | static boolean |
1551 | mips_elf_sym_is_global (abfd, sym) | |
1552 | bfd *abfd ATTRIBUTE_UNUSED; | |
1553 | asymbol *sym; | |
1554 | { | |
1555 | if (SGI_COMPAT (abfd)) | |
1556 | return (sym->flags & BSF_SECTION_SYM) == 0; | |
1557 | else | |
1558 | return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0 | |
1559 | || bfd_is_und_section (bfd_get_section (sym)) | |
1560 | || bfd_is_com_section (bfd_get_section (sym))); | |
1561 | } | |
1562 | \f | |
1563 | /* Set the right machine number for a MIPS ELF file. */ | |
7403cb63 | 1564 | |
c6e90b02 TS |
1565 | static boolean |
1566 | mips_elf32_object_p (abfd) | |
1567 | bfd *abfd; | |
1568 | { | |
1569 | unsigned long mach; | |
103186c6 | 1570 | |
c6e90b02 TS |
1571 | /* Irix 5 and 6 are broken. Object file symbol tables are not always |
1572 | sorted correctly such that local symbols precede global symbols, | |
1573 | and the sh_info field in the symbol table is not always right. */ | |
1574 | if (SGI_COMPAT (abfd)) | |
1575 | elf_bad_symtab (abfd) = true; | |
103186c6 | 1576 | |
c6e90b02 TS |
1577 | mach = _bfd_elf_mips_mach (elf_elfheader (abfd)->e_flags); |
1578 | bfd_default_set_arch_mach (abfd, bfd_arch_mips, mach); | |
252b5132 | 1579 | |
c6e90b02 TS |
1580 | return true; |
1581 | } | |
1582 | \f | |
1583 | /* MIPS ELF local labels start with '$', not 'L'. */ | |
252b5132 | 1584 | |
c6e90b02 TS |
1585 | static boolean |
1586 | mips_elf_is_local_label_name (abfd, name) | |
1587 | bfd *abfd; | |
1588 | const char *name; | |
1589 | { | |
1590 | if (name[0] == '$') | |
1591 | return true; | |
252b5132 | 1592 | |
c6e90b02 TS |
1593 | /* On Irix 6, the labels go back to starting with '.', so we accept |
1594 | the generic ELF local label syntax as well. */ | |
1595 | return _bfd_elf_is_local_label_name (abfd, name); | |
252b5132 RH |
1596 | } |
1597 | \f | |
c6e90b02 | 1598 | /* Support for core dump NOTE sections. */ |
bb0082d6 | 1599 | static boolean |
c6e90b02 | 1600 | elf32_mips_grok_prstatus (abfd, note) |
bb0082d6 AM |
1601 | bfd *abfd; |
1602 | Elf_Internal_Note *note; | |
1603 | { | |
1604 | int offset; | |
dc810e39 | 1605 | unsigned int raw_size; |
bb0082d6 AM |
1606 | |
1607 | switch (note->descsz) | |
1608 | { | |
1609 | default: | |
1610 | return false; | |
1611 | ||
1612 | case 256: /* Linux/MIPS */ | |
1613 | /* pr_cursig */ | |
1614 | elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); | |
1615 | ||
1616 | /* pr_pid */ | |
1617 | elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); | |
1618 | ||
1619 | /* pr_reg */ | |
1620 | offset = 72; | |
1621 | raw_size = 180; | |
1622 | ||
1623 | break; | |
1624 | } | |
1625 | ||
1626 | /* Make a ".reg/999" section. */ | |
936e320b AM |
1627 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", |
1628 | raw_size, note->descpos + offset); | |
bb0082d6 AM |
1629 | } |
1630 | ||
9e80ff3a | 1631 | static boolean |
c6e90b02 | 1632 | elf32_mips_grok_psinfo (abfd, note) |
bb0082d6 AM |
1633 | bfd *abfd; |
1634 | Elf_Internal_Note *note; | |
1635 | { | |
1636 | switch (note->descsz) | |
1637 | { | |
1638 | default: | |
1639 | return false; | |
1640 | ||
1641 | case 128: /* Linux/MIPS elf_prpsinfo */ | |
1642 | elf_tdata (abfd)->core_program | |
1643 | = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16); | |
1644 | elf_tdata (abfd)->core_command | |
1645 | = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80); | |
1646 | } | |
1647 | ||
1648 | /* Note that for some reason, a spurious space is tacked | |
1649 | onto the end of the args in some (at least one anyway) | |
1650 | implementations, so strip it off if it exists. */ | |
1651 | ||
1652 | { | |
1653 | char *command = elf_tdata (abfd)->core_command; | |
1654 | int n = strlen (command); | |
1655 | ||
1656 | if (0 < n && command[n - 1] == ' ') | |
1657 | command[n - 1] = '\0'; | |
1658 | } | |
1659 | ||
1660 | return true; | |
1661 | } | |
1662 | \f | |
73d074b4 DJ |
1663 | #define PDR_SIZE 32 |
1664 | ||
1665 | static boolean | |
c6e90b02 | 1666 | elf32_mips_discard_info (abfd, cookie, info) |
73d074b4 DJ |
1667 | bfd *abfd; |
1668 | struct elf_reloc_cookie *cookie; | |
1669 | struct bfd_link_info *info; | |
1670 | { | |
1671 | asection *o; | |
73d074b4 DJ |
1672 | boolean ret = false; |
1673 | unsigned char *tdata; | |
1674 | size_t i, skip; | |
1675 | ||
1676 | o = bfd_get_section_by_name (abfd, ".pdr"); | |
1677 | if (! o) | |
1678 | return false; | |
1679 | if (o->_raw_size == 0) | |
1680 | return false; | |
1681 | if (o->_raw_size % PDR_SIZE != 0) | |
1682 | return false; | |
1683 | if (o->output_section != NULL | |
1684 | && bfd_is_abs_section (o->output_section)) | |
1685 | return false; | |
1686 | ||
1687 | tdata = bfd_zmalloc (o->_raw_size / PDR_SIZE); | |
1688 | if (! tdata) | |
1689 | return false; | |
1690 | ||
1691 | cookie->rels = _bfd_elf32_link_read_relocs (abfd, o, (PTR) NULL, | |
1692 | (Elf_Internal_Rela *) NULL, | |
1693 | info->keep_memory); | |
1694 | if (!cookie->rels) | |
1695 | { | |
1696 | free (tdata); | |
1697 | return false; | |
1698 | } | |
1699 | ||
1700 | cookie->rel = cookie->rels; | |
cb7394f2 | 1701 | cookie->relend = cookie->rels + o->reloc_count; |
175e9962 | 1702 | |
73d074b4 DJ |
1703 | for (i = 0, skip = 0; i < o->_raw_size; i ++) |
1704 | { | |
1705 | if (_bfd_elf32_reloc_symbol_deleted_p (i * PDR_SIZE, cookie)) | |
1706 | { | |
1707 | tdata[i] = 1; | |
1708 | skip ++; | |
1709 | } | |
1710 | } | |
1711 | ||
1712 | if (skip != 0) | |
1713 | { | |
1714 | elf_section_data (o)->tdata = tdata; | |
1715 | o->_cooked_size = o->_raw_size - skip * PDR_SIZE; | |
1716 | ret = true; | |
1717 | } | |
1718 | else | |
1719 | free (tdata); | |
1720 | ||
1721 | if (! info->keep_memory) | |
1722 | free (cookie->rels); | |
1723 | ||
1724 | return ret; | |
1725 | } | |
1726 | ||
73d074b4 | 1727 | static boolean |
c6e90b02 | 1728 | elf32_mips_write_section (output_bfd, sec, contents) |
73d074b4 DJ |
1729 | bfd *output_bfd; |
1730 | asection *sec; | |
1731 | bfd_byte *contents; | |
1732 | { | |
1733 | bfd_byte *to, *from, *end; | |
1734 | int i; | |
1735 | ||
1736 | if (strcmp (sec->name, ".pdr") != 0) | |
1737 | return false; | |
1738 | ||
1739 | if (elf_section_data (sec)->tdata == NULL) | |
1740 | return false; | |
1741 | ||
1742 | to = contents; | |
1743 | end = contents + sec->_raw_size; | |
1744 | for (from = contents, i = 0; | |
1745 | from < end; | |
1746 | from += PDR_SIZE, i++) | |
1747 | { | |
1748 | if (((unsigned char *)elf_section_data (sec)->tdata)[i] == 1) | |
1749 | continue; | |
1750 | if (to != from) | |
1751 | memcpy (to, from, PDR_SIZE); | |
1752 | to += PDR_SIZE; | |
1753 | } | |
1754 | bfd_set_section_contents (output_bfd, sec->output_section, contents, | |
1755 | (file_ptr) sec->output_offset, | |
1756 | sec->_cooked_size); | |
1757 | return true; | |
1758 | } | |
c6e90b02 TS |
1759 | |
1760 | /* Depending on the target vector we generate some version of Irix | |
1761 | executables or "normal" MIPS ELF ABI executables. */ | |
1762 | static irix_compat_t | |
1763 | elf32_mips_irix_compat (abfd) | |
1764 | bfd *abfd; | |
1765 | { | |
cb7394f2 TS |
1766 | if ((abfd->xvec == &bfd_elf32_bigmips_vec) |
1767 | || (abfd->xvec == &bfd_elf32_littlemips_vec)) | |
c6e90b02 | 1768 | return ict_irix5; |
cb7394f2 TS |
1769 | else |
1770 | return ict_none; | |
c6e90b02 | 1771 | } |
73d074b4 | 1772 | \f |
030d18fb CD |
1773 | /* Given a data section and an in-memory embedded reloc section, store |
1774 | relocation information into the embedded reloc section which can be | |
1775 | used at runtime to relocate the data section. This is called by the | |
1776 | linker when the --embedded-relocs switch is used. This is called | |
1777 | after the add_symbols entry point has been called for all the | |
1778 | objects, and before the final_link entry point is called. */ | |
1779 | ||
1780 | boolean | |
1781 | bfd_mips_elf32_create_embedded_relocs (abfd, info, datasec, relsec, errmsg) | |
1782 | bfd *abfd; | |
1783 | struct bfd_link_info *info; | |
1784 | asection *datasec; | |
1785 | asection *relsec; | |
1786 | char **errmsg; | |
1787 | { | |
1788 | Elf_Internal_Shdr *symtab_hdr; | |
1789 | Elf_Internal_Shdr *shndx_hdr; | |
1790 | Elf32_External_Sym *extsyms; | |
1791 | Elf32_External_Sym *free_extsyms = NULL; | |
1792 | Elf_External_Sym_Shndx *shndx_buf = NULL; | |
1793 | Elf_Internal_Rela *internal_relocs; | |
1794 | Elf_Internal_Rela *free_relocs = NULL; | |
1795 | Elf_Internal_Rela *irel, *irelend; | |
1796 | bfd_byte *p; | |
1797 | bfd_size_type amt; | |
1798 | ||
1799 | BFD_ASSERT (! info->relocateable); | |
1800 | ||
1801 | *errmsg = NULL; | |
1802 | ||
1803 | if (datasec->reloc_count == 0) | |
1804 | return true; | |
1805 | ||
1806 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1807 | /* Read this BFD's symbols if we haven't done so already, or get the cached | |
1808 | copy if it exists. */ | |
1809 | if (symtab_hdr->contents != NULL) | |
1810 | extsyms = (Elf32_External_Sym *) symtab_hdr->contents; | |
1811 | else | |
1812 | { | |
1813 | /* Go get them off disk. */ | |
1814 | if (info->keep_memory) | |
1815 | extsyms = ((Elf32_External_Sym *) | |
1816 | bfd_alloc (abfd, symtab_hdr->sh_size)); | |
1817 | else | |
1818 | extsyms = ((Elf32_External_Sym *) | |
1819 | bfd_malloc (symtab_hdr->sh_size)); | |
1820 | if (extsyms == NULL) | |
1821 | goto error_return; | |
1822 | if (! info->keep_memory) | |
1823 | free_extsyms = extsyms; | |
1824 | if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0 | |
1825 | || (bfd_bread (extsyms, symtab_hdr->sh_size, abfd) | |
1826 | != symtab_hdr->sh_size)) | |
1827 | goto error_return; | |
1828 | if (info->keep_memory) | |
1829 | symtab_hdr->contents = (unsigned char *) extsyms; | |
1830 | } | |
1831 | ||
1832 | shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr; | |
1833 | if (shndx_hdr->sh_size != 0) | |
1834 | { | |
1835 | amt = symtab_hdr->sh_info * sizeof (Elf_External_Sym_Shndx); | |
1836 | shndx_buf = (Elf_External_Sym_Shndx *) bfd_malloc (amt); | |
1837 | if (shndx_buf == NULL) | |
1838 | goto error_return; | |
1839 | if (bfd_seek (abfd, shndx_hdr->sh_offset, SEEK_SET) != 0 | |
1840 | || bfd_bread ((PTR) shndx_buf, amt, abfd) != amt) | |
1841 | goto error_return; | |
1842 | } | |
1843 | ||
1844 | /* Get a copy of the native relocations. */ | |
1845 | internal_relocs = (_bfd_elf32_link_read_relocs | |
1846 | (abfd, datasec, (PTR) NULL, (Elf_Internal_Rela *) NULL, | |
1847 | info->keep_memory)); | |
1848 | if (internal_relocs == NULL) | |
1849 | goto error_return; | |
1850 | if (! info->keep_memory) | |
1851 | free_relocs = internal_relocs; | |
1852 | ||
1853 | relsec->contents = (bfd_byte *) bfd_alloc (abfd, datasec->reloc_count * 12); | |
1854 | if (relsec->contents == NULL) | |
1855 | goto error_return; | |
1856 | ||
1857 | p = relsec->contents; | |
1858 | ||
1859 | irelend = internal_relocs + datasec->reloc_count; | |
1860 | ||
1861 | for (irel = internal_relocs; irel < irelend; irel++, p += 12) | |
1862 | { | |
1863 | asection *targetsec; | |
1864 | ||
1865 | /* We are going to write a four byte longword into the runtime | |
c6e90b02 TS |
1866 | reloc section. The longword will be the address in the data |
1867 | section which must be relocated. It is followed by the name | |
1868 | of the target section NUL-padded or truncated to 8 | |
1869 | characters. */ | |
030d18fb CD |
1870 | |
1871 | /* We can only relocate absolute longword relocs at run time. */ | |
1872 | if ((ELF32_R_TYPE (irel->r_info) != (int) R_MIPS_32) && | |
1873 | (ELF32_R_TYPE (irel->r_info) != (int) R_MIPS_64)) | |
1874 | { | |
1875 | *errmsg = _("unsupported reloc type"); | |
1876 | bfd_set_error (bfd_error_bad_value); | |
1877 | goto error_return; | |
1878 | } | |
1879 | /* Get the target section referred to by the reloc. */ | |
1880 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
1881 | { | |
1882 | Elf32_External_Sym *esym; | |
1883 | Elf_External_Sym_Shndx *shndx; | |
1884 | Elf_Internal_Sym isym; | |
1885 | ||
1886 | /* A local symbol. */ | |
1887 | esym = extsyms + ELF32_R_SYM (irel->r_info); | |
1888 | shndx = shndx_buf + (shndx_buf ? ELF32_R_SYM (irel->r_info) : 0); | |
73ff0d56 AM |
1889 | bfd_elf32_swap_symbol_in (abfd, (const PTR *) esym, |
1890 | (const PTR *) shndx, &isym); | |
030d18fb CD |
1891 | |
1892 | targetsec = bfd_section_from_elf_index (abfd, isym.st_shndx); | |
1893 | } | |
1894 | else | |
1895 | { | |
1896 | unsigned long indx; | |
1897 | struct elf_link_hash_entry *h; | |
1898 | ||
1899 | /* An external symbol. */ | |
1900 | indx = ELF32_R_SYM (irel->r_info); | |
1901 | h = elf_sym_hashes (abfd)[indx]; | |
1902 | targetsec = NULL; | |
1903 | /* | |
c6e90b02 TS |
1904 | For some reason, in certain programs, the symbol will |
1905 | not be in the hash table. It seems to happen when you | |
1906 | declare a static table of pointers to const external structures. | |
1907 | In this case, the relocs are relative to data, not | |
1908 | text, so just treating it like an undefined link | |
1909 | should be sufficient. */ | |
030d18fb CD |
1910 | BFD_ASSERT(h != NULL); |
1911 | if (h->root.type == bfd_link_hash_defined | |
1912 | || h->root.type == bfd_link_hash_defweak) | |
1913 | targetsec = h->root.u.def.section; | |
1914 | } | |
1915 | ||
1916 | ||
1917 | /* | |
c6e90b02 TS |
1918 | Set the low bit of the relocation offset if it's a MIPS64 reloc. |
1919 | Relocations will always be on (at least) 32-bit boundaries. */ | |
030d18fb CD |
1920 | |
1921 | bfd_put_32 (abfd, ((irel->r_offset + datasec->output_offset) + | |
1922 | ((ELF32_R_TYPE (irel->r_info) == (int) R_MIPS_64) ? 1 : 0)), | |
1923 | p); | |
1924 | memset (p + 4, 0, 8); | |
1925 | if (targetsec != NULL) | |
1926 | strncpy (p + 4, targetsec->output_section->name, 8); | |
1927 | } | |
1928 | ||
1929 | if (shndx_buf != NULL) | |
1930 | free (shndx_buf); | |
1931 | if (free_extsyms != NULL) | |
1932 | free (free_extsyms); | |
1933 | if (free_relocs != NULL) | |
1934 | free (free_relocs); | |
1935 | return true; | |
1936 | ||
1937 | error_return: | |
1938 | if (shndx_buf != NULL) | |
1939 | free (shndx_buf); | |
1940 | if (free_extsyms != NULL) | |
1941 | free (free_extsyms); | |
1942 | if (free_relocs != NULL) | |
1943 | free (free_relocs); | |
1944 | return false; | |
1945 | } | |
1946 | \f | |
252b5132 RH |
1947 | /* ECOFF swapping routines. These are used when dealing with the |
1948 | .mdebug section, which is in the ECOFF debugging format. */ | |
be3ccd9c | 1949 | static const struct ecoff_debug_swap mips_elf32_ecoff_debug_swap = { |
252b5132 RH |
1950 | /* Symbol table magic number. */ |
1951 | magicSym, | |
1952 | /* Alignment of debugging information. E.g., 4. */ | |
1953 | 4, | |
1954 | /* Sizes of external symbolic information. */ | |
1955 | sizeof (struct hdr_ext), | |
1956 | sizeof (struct dnr_ext), | |
1957 | sizeof (struct pdr_ext), | |
1958 | sizeof (struct sym_ext), | |
1959 | sizeof (struct opt_ext), | |
1960 | sizeof (struct fdr_ext), | |
1961 | sizeof (struct rfd_ext), | |
1962 | sizeof (struct ext_ext), | |
1963 | /* Functions to swap in external symbolic data. */ | |
1964 | ecoff_swap_hdr_in, | |
1965 | ecoff_swap_dnr_in, | |
1966 | ecoff_swap_pdr_in, | |
1967 | ecoff_swap_sym_in, | |
1968 | ecoff_swap_opt_in, | |
1969 | ecoff_swap_fdr_in, | |
1970 | ecoff_swap_rfd_in, | |
1971 | ecoff_swap_ext_in, | |
1972 | _bfd_ecoff_swap_tir_in, | |
1973 | _bfd_ecoff_swap_rndx_in, | |
1974 | /* Functions to swap out external symbolic data. */ | |
1975 | ecoff_swap_hdr_out, | |
1976 | ecoff_swap_dnr_out, | |
1977 | ecoff_swap_pdr_out, | |
1978 | ecoff_swap_sym_out, | |
1979 | ecoff_swap_opt_out, | |
1980 | ecoff_swap_fdr_out, | |
1981 | ecoff_swap_rfd_out, | |
1982 | ecoff_swap_ext_out, | |
1983 | _bfd_ecoff_swap_tir_out, | |
1984 | _bfd_ecoff_swap_rndx_out, | |
1985 | /* Function to read in symbolic data. */ | |
1986 | _bfd_mips_elf_read_ecoff_info | |
1987 | }; | |
1988 | \f | |
252b5132 RH |
1989 | #define ELF_ARCH bfd_arch_mips |
1990 | #define ELF_MACHINE_CODE EM_MIPS | |
1991 | ||
1992 | /* The SVR4 MIPS ABI says that this should be 0x10000, but Irix 5 uses | |
1993 | a value of 0x1000, and we are compatible. */ | |
1994 | #define ELF_MAXPAGESIZE 0x1000 | |
1995 | ||
1996 | #define elf_backend_collect true | |
1997 | #define elf_backend_type_change_ok true | |
1998 | #define elf_backend_can_gc_sections true | |
3f830999 | 1999 | #define elf_info_to_howto mips_info_to_howto_rela |
252b5132 RH |
2000 | #define elf_info_to_howto_rel mips_info_to_howto_rel |
2001 | #define elf_backend_sym_is_global mips_elf_sym_is_global | |
c6e90b02 | 2002 | #define elf_backend_object_p mips_elf32_object_p |
d75bc93d TS |
2003 | #define elf_backend_symbol_processing _bfd_mips_elf_symbol_processing |
2004 | #define elf_backend_section_processing _bfd_mips_elf_section_processing | |
103186c6 | 2005 | #define elf_backend_section_from_shdr _bfd_mips_elf_section_from_shdr |
252b5132 RH |
2006 | #define elf_backend_fake_sections _bfd_mips_elf_fake_sections |
2007 | #define elf_backend_section_from_bfd_section \ | |
2008 | _bfd_mips_elf_section_from_bfd_section | |
103186c6 | 2009 | #define elf_backend_add_symbol_hook _bfd_mips_elf_add_symbol_hook |
d75bc93d TS |
2010 | #define elf_backend_link_output_symbol_hook \ |
2011 | _bfd_mips_elf_link_output_symbol_hook | |
103186c6 MM |
2012 | #define elf_backend_create_dynamic_sections \ |
2013 | _bfd_mips_elf_create_dynamic_sections | |
2014 | #define elf_backend_check_relocs _bfd_mips_elf_check_relocs | |
2015 | #define elf_backend_adjust_dynamic_symbol \ | |
2016 | _bfd_mips_elf_adjust_dynamic_symbol | |
2017 | #define elf_backend_always_size_sections \ | |
2018 | _bfd_mips_elf_always_size_sections | |
2019 | #define elf_backend_size_dynamic_sections \ | |
2020 | _bfd_mips_elf_size_dynamic_sections | |
2021 | #define elf_backend_relocate_section _bfd_mips_elf_relocate_section | |
103186c6 MM |
2022 | #define elf_backend_finish_dynamic_symbol \ |
2023 | _bfd_mips_elf_finish_dynamic_symbol | |
2024 | #define elf_backend_finish_dynamic_sections \ | |
2025 | _bfd_mips_elf_finish_dynamic_sections | |
d75bc93d TS |
2026 | #define elf_backend_final_write_processing \ |
2027 | _bfd_mips_elf_final_write_processing | |
2028 | #define elf_backend_additional_program_headers \ | |
2029 | _bfd_mips_elf_additional_program_headers | |
2030 | #define elf_backend_modify_segment_map _bfd_mips_elf_modify_segment_map | |
103186c6 MM |
2031 | #define elf_backend_gc_mark_hook _bfd_mips_elf_gc_mark_hook |
2032 | #define elf_backend_gc_sweep_hook _bfd_mips_elf_gc_sweep_hook | |
8a20f077 UC |
2033 | #define elf_backend_copy_indirect_symbol \ |
2034 | _bfd_mips_elf_copy_indirect_symbol | |
b305ef96 | 2035 | #define elf_backend_hide_symbol _bfd_mips_elf_hide_symbol |
c6e90b02 TS |
2036 | #define elf_backend_grok_prstatus elf32_mips_grok_prstatus |
2037 | #define elf_backend_grok_psinfo elf32_mips_grok_psinfo | |
d75bc93d TS |
2038 | #define elf_backend_ecoff_debug_swap &mips_elf32_ecoff_debug_swap |
2039 | ||
2040 | #define elf_backend_got_header_size (4 * MIPS_RESERVED_GOTNO) | |
2041 | #define elf_backend_plt_header_size 0 | |
2042 | #define elf_backend_may_use_rel_p 1 | |
2043 | #define elf_backend_may_use_rela_p 0 | |
2044 | #define elf_backend_default_use_rela_p 0 | |
2045 | #define elf_backend_sign_extend_vma true | |
b305ef96 | 2046 | |
c6e90b02 | 2047 | #define elf_backend_discard_info elf32_mips_discard_info |
73d074b4 | 2048 | #define elf_backend_ignore_discarded_relocs \ |
53bfd6b4 | 2049 | _bfd_mips_elf_ignore_discarded_relocs |
c6e90b02 TS |
2050 | #define elf_backend_write_section elf32_mips_write_section |
2051 | #define elf_backend_mips_irix_compat elf32_mips_irix_compat | |
2052 | #define elf_backend_mips_rtype_to_howto mips_elf32_rtype_to_howto | |
252b5132 RH |
2053 | #define bfd_elf32_bfd_is_local_label_name \ |
2054 | mips_elf_is_local_label_name | |
2055 | #define bfd_elf32_find_nearest_line _bfd_mips_elf_find_nearest_line | |
2056 | #define bfd_elf32_set_section_contents _bfd_mips_elf_set_section_contents | |
c6e90b02 TS |
2057 | #define bfd_elf32_bfd_get_relocated_section_contents \ |
2058 | _bfd_elf_mips_get_relocated_section_contents | |
252b5132 | 2059 | #define bfd_elf32_bfd_link_hash_table_create \ |
103186c6 MM |
2060 | _bfd_mips_elf_link_hash_table_create |
2061 | #define bfd_elf32_bfd_final_link _bfd_mips_elf_final_link | |
252b5132 RH |
2062 | #define bfd_elf32_bfd_merge_private_bfd_data \ |
2063 | _bfd_mips_elf_merge_private_bfd_data | |
2064 | #define bfd_elf32_bfd_set_private_flags _bfd_mips_elf_set_private_flags | |
2065 | #define bfd_elf32_bfd_print_private_bfd_data \ | |
2066 | _bfd_mips_elf_print_private_bfd_data | |
e364195d | 2067 | |
d75bc93d TS |
2068 | /* Support for SGI-ish mips targets. */ |
2069 | #define TARGET_LITTLE_SYM bfd_elf32_littlemips_vec | |
2070 | #define TARGET_LITTLE_NAME "elf32-littlemips" | |
2071 | #define TARGET_BIG_SYM bfd_elf32_bigmips_vec | |
2072 | #define TARGET_BIG_NAME "elf32-bigmips" | |
2073 | ||
2074 | #include "elf32-target.h" | |
e364195d | 2075 | |
d75bc93d TS |
2076 | /* Support for traditional mips targets. */ |
2077 | #define INCLUDED_TARGET_FILE /* More a type of flag. */ | |
e364195d UC |
2078 | |
2079 | #undef TARGET_LITTLE_SYM | |
2080 | #undef TARGET_LITTLE_NAME | |
2081 | #undef TARGET_BIG_SYM | |
2082 | #undef TARGET_BIG_NAME | |
2083 | ||
2084 | #define TARGET_LITTLE_SYM bfd_elf32_tradlittlemips_vec | |
2085 | #define TARGET_LITTLE_NAME "elf32-tradlittlemips" | |
2086 | #define TARGET_BIG_SYM bfd_elf32_tradbigmips_vec | |
2087 | #define TARGET_BIG_NAME "elf32-tradbigmips" | |
2088 | ||
c6e90b02 | 2089 | /* Include the target file again for this target. */ |
e364195d | 2090 | #include "elf32-target.h" |