Commit | Line | Data |
---|---|---|
b3c0fc57 | 1 | /* MIPS-specific support for 32-bit ELF |
51fbf454 | 2 | Copyright 1993, 1994, 1995 Free Software Foundation, Inc. |
6b4b4d17 | 3 | |
b3c0fc57 ILT |
4 | Most of the information added by Ian Lance Taylor, Cygnus Support, |
5 | <ian@cygnus.com>. | |
6 | ||
6b4b4d17 JK |
7 | This file is part of BFD, the Binary File Descriptor library. |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
22 | ||
23 | #include "bfd.h" | |
24 | #include "sysdep.h" | |
25 | #include "libbfd.h" | |
6e07e54f ILT |
26 | #include "bfdlink.h" |
27 | #include "genlink.h" | |
6b4b4d17 | 28 | #include "libelf.h" |
b3c0fc57 ILT |
29 | #include "elf/mips.h" |
30 | ||
6e07e54f ILT |
31 | /* Get the ECOFF swapping routines. */ |
32 | #include "coff/sym.h" | |
33 | #include "coff/symconst.h" | |
34 | #include "coff/internal.h" | |
35 | #include "coff/ecoff.h" | |
36 | #include "coff/mips.h" | |
37 | #define ECOFF_32 | |
38 | #include "ecoffswap.h" | |
39 | ||
b3c0fc57 ILT |
40 | static bfd_reloc_status_type mips_elf_hi16_reloc PARAMS ((bfd *abfd, |
41 | arelent *reloc, | |
42 | asymbol *symbol, | |
43 | PTR data, | |
44 | asection *section, | |
6e07e54f ILT |
45 | bfd *output_bfd, |
46 | char **error)); | |
47 | static bfd_reloc_status_type mips_elf_got16_reloc PARAMS ((bfd *abfd, | |
48 | arelent *reloc, | |
49 | asymbol *symbol, | |
50 | PTR data, | |
51 | asection *section, | |
52 | bfd *output_bfd, | |
53 | char **error)); | |
b3c0fc57 ILT |
54 | static bfd_reloc_status_type mips_elf_lo16_reloc PARAMS ((bfd *abfd, |
55 | arelent *reloc, | |
56 | asymbol *symbol, | |
57 | PTR data, | |
58 | asection *section, | |
6e07e54f ILT |
59 | bfd *output_bfd, |
60 | char **error)); | |
b3c0fc57 ILT |
61 | static bfd_reloc_status_type mips_elf_gprel16_reloc PARAMS ((bfd *abfd, |
62 | arelent *reloc, | |
63 | asymbol *symbol, | |
64 | PTR data, | |
65 | asection *section, | |
6e07e54f ILT |
66 | bfd *output_bfd, |
67 | char **error)); | |
16fe8950 | 68 | static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup |
aac6b32f ILT |
69 | PARAMS ((bfd *, bfd_reloc_code_real_type)); |
70 | static void mips_info_to_howto_rel | |
71 | PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *)); | |
72 | static boolean mips_elf_sym_is_global PARAMS ((bfd *, asymbol *)); | |
73 | static boolean mips_elf_object_p PARAMS ((bfd *)); | |
24f13b03 ILT |
74 | static void mips_elf_final_write_processing |
75 | PARAMS ((bfd *, boolean)); | |
aac6b32f ILT |
76 | static boolean mips_elf_section_from_shdr |
77 | PARAMS ((bfd *, Elf32_Internal_Shdr *, char *)); | |
78 | static boolean mips_elf_fake_sections | |
79 | PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *)); | |
80 | static boolean mips_elf_section_from_bfd_section | |
81 | PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *, int *)); | |
82 | static boolean mips_elf_section_processing | |
83 | PARAMS ((bfd *, Elf32_Internal_Shdr *)); | |
84 | static void mips_elf_symbol_processing PARAMS ((bfd *, asymbol *)); | |
85 | static boolean mips_elf_read_ecoff_info | |
86 | PARAMS ((bfd *, asection *, struct ecoff_debug_info *)); | |
a16fcab3 KR |
87 | static boolean mips_elf_find_nearest_line |
88 | PARAMS ((bfd *, asection *, asymbol **, bfd_vma, const char **, | |
89 | const char **, unsigned int *)); | |
aac6b32f ILT |
90 | static struct bfd_hash_entry *mips_elf_link_hash_newfunc |
91 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); | |
92 | static struct bfd_link_hash_table *mips_elf_link_hash_table_create | |
93 | PARAMS ((bfd *)); | |
94 | static int gptab_compare PARAMS ((const void *, const void *)); | |
95 | static boolean mips_elf_final_link | |
96 | PARAMS ((bfd *, struct bfd_link_info *)); | |
97 | static void mips_elf_relocate_hi16 | |
98 | PARAMS ((bfd *, Elf_Internal_Rela *, Elf_Internal_Rela *, bfd_byte *, | |
99 | bfd_vma)); | |
100 | static boolean mips_elf_relocate_section | |
101 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, | |
82b1edf7 | 102 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); |
aac6b32f ILT |
103 | static boolean mips_elf_add_symbol_hook |
104 | PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *, | |
105 | const char **, flagword *, asection **, bfd_vma *)); | |
b3c0fc57 ILT |
106 | |
107 | #define USE_REL 1 /* MIPS uses REL relocations instead of RELA */ | |
108 | ||
109 | enum reloc_type | |
110 | { | |
111 | R_MIPS_NONE = 0, | |
112 | R_MIPS_16, R_MIPS_32, | |
113 | R_MIPS_REL32, R_MIPS_26, | |
114 | R_MIPS_HI16, R_MIPS_LO16, | |
115 | R_MIPS_GPREL16, R_MIPS_LITERAL, | |
116 | R_MIPS_GOT16, R_MIPS_PC16, | |
117 | R_MIPS_CALL16, R_MIPS_GPREL32, | |
6a5848cd ILT |
118 | /* The remaining relocs are defined on Irix, although they are not |
119 | in the MIPS ELF ABI. */ | |
120 | R_MIPS_UNUSED1, R_MIPS_UNUSED2, | |
121 | R_MIPS_UNUSED3, | |
122 | R_MIPS_SHIFT5, R_MIPS_SHIFT6, | |
123 | R_MIPS_64, R_MIPS_GOT_DISP, | |
124 | R_MIPS_GOT_PAGE, R_MIPS_GOT_OFST, | |
125 | R_MIPS_GOT_HI16, R_MIPS_GOT_LO16, | |
126 | R_MIPS_SUB, R_MIPS_INSERT_A, | |
127 | R_MIPS_INSERT_B, R_MIPS_DELETE, | |
128 | R_MIPS_HIGHER, R_MIPS_HIGHEST, | |
129 | R_MIPS_CALL_HI16, R_MIPS_CALL_LO16, | |
b3c0fc57 ILT |
130 | R_MIPS_max |
131 | }; | |
132 | ||
133 | static reloc_howto_type elf_mips_howto_table[] = | |
134 | { | |
135 | /* No relocation. */ | |
136 | HOWTO (R_MIPS_NONE, /* type */ | |
137 | 0, /* rightshift */ | |
138 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
139 | 0, /* bitsize */ | |
140 | false, /* pc_relative */ | |
141 | 0, /* bitpos */ | |
142 | complain_overflow_dont, /* complain_on_overflow */ | |
143 | bfd_elf_generic_reloc, /* special_function */ | |
144 | "R_MIPS_NONE", /* name */ | |
145 | false, /* partial_inplace */ | |
146 | 0, /* src_mask */ | |
147 | 0, /* dst_mask */ | |
148 | false), /* pcrel_offset */ | |
149 | ||
150 | /* 16 bit relocation. */ | |
151 | HOWTO (R_MIPS_16, /* type */ | |
152 | 0, /* rightshift */ | |
153 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
154 | 16, /* bitsize */ | |
155 | false, /* pc_relative */ | |
156 | 0, /* bitpos */ | |
157 | complain_overflow_bitfield, /* complain_on_overflow */ | |
158 | bfd_elf_generic_reloc, /* special_function */ | |
159 | "R_MIPS_16", /* name */ | |
160 | true, /* partial_inplace */ | |
161 | 0xffff, /* src_mask */ | |
162 | 0xffff, /* dst_mask */ | |
163 | false), /* pcrel_offset */ | |
164 | ||
165 | /* 32 bit relocation. */ | |
166 | HOWTO (R_MIPS_32, /* type */ | |
167 | 0, /* rightshift */ | |
168 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
169 | 32, /* bitsize */ | |
170 | false, /* pc_relative */ | |
171 | 0, /* bitpos */ | |
172 | complain_overflow_bitfield, /* complain_on_overflow */ | |
173 | bfd_elf_generic_reloc, /* special_function */ | |
174 | "R_MIPS_32", /* name */ | |
175 | true, /* partial_inplace */ | |
176 | 0xffffffff, /* src_mask */ | |
177 | 0xffffffff, /* dst_mask */ | |
178 | false), /* pcrel_offset */ | |
179 | ||
180 | /* 32 bit symbol relative relocation. */ | |
181 | HOWTO (R_MIPS_REL32, /* type */ | |
182 | 0, /* rightshift */ | |
183 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
184 | 32, /* bitsize */ | |
185 | false, /* pc_relative */ | |
186 | 0, /* bitpos */ | |
187 | complain_overflow_bitfield, /* complain_on_overflow */ | |
188 | bfd_elf_generic_reloc, /* special_function */ | |
189 | "R_MIPS_REL32", /* name */ | |
190 | true, /* partial_inplace */ | |
191 | 0xffffffff, /* src_mask */ | |
192 | 0xffffffff, /* dst_mask */ | |
193 | false), /* pcrel_offset */ | |
194 | ||
195 | /* 26 bit branch address. */ | |
196 | HOWTO (R_MIPS_26, /* type */ | |
197 | 2, /* rightshift */ | |
198 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
199 | 26, /* bitsize */ | |
200 | false, /* pc_relative */ | |
201 | 0, /* bitpos */ | |
6e07e54f ILT |
202 | complain_overflow_dont, /* complain_on_overflow */ |
203 | /* This needs complex overflow | |
204 | detection, because the upper four | |
205 | bits must match the PC. */ | |
b3c0fc57 ILT |
206 | bfd_elf_generic_reloc, /* special_function */ |
207 | "R_MIPS_26", /* name */ | |
208 | true, /* partial_inplace */ | |
209 | 0x3ffffff, /* src_mask */ | |
210 | 0x3ffffff, /* dst_mask */ | |
211 | false), /* pcrel_offset */ | |
212 | ||
213 | /* High 16 bits of symbol value. */ | |
214 | HOWTO (R_MIPS_HI16, /* 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_hi16_reloc, /* special_function */ | |
222 | "R_MIPS_HI16", /* name */ | |
223 | true, /* partial_inplace */ | |
224 | 0xffff, /* src_mask */ | |
225 | 0xffff, /* dst_mask */ | |
226 | false), /* pcrel_offset */ | |
227 | ||
228 | /* Low 16 bits of symbol value. */ | |
229 | HOWTO (R_MIPS_LO16, /* 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_dont, /* complain_on_overflow */ | |
236 | mips_elf_lo16_reloc, /* special_function */ | |
237 | "R_MIPS_LO16", /* name */ | |
238 | true, /* partial_inplace */ | |
239 | 0xffff, /* src_mask */ | |
240 | 0xffff, /* dst_mask */ | |
241 | false), /* pcrel_offset */ | |
242 | ||
243 | /* GP relative reference. */ | |
244 | HOWTO (R_MIPS_GPREL16, /* 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_gprel16_reloc, /* special_function */ | |
252 | "R_MIPS_GPREL16", /* name */ | |
253 | true, /* partial_inplace */ | |
254 | 0xffff, /* src_mask */ | |
255 | 0xffff, /* dst_mask */ | |
256 | false), /* pcrel_offset */ | |
257 | ||
258 | /* Reference to literal section. */ | |
259 | HOWTO (R_MIPS_LITERAL, /* 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_gprel16_reloc, /* special_function */ | |
267 | "R_MIPS_LITERAL", /* name */ | |
268 | true, /* partial_inplace */ | |
269 | 0xffff, /* src_mask */ | |
270 | 0xffff, /* dst_mask */ | |
271 | false), /* pcrel_offset */ | |
272 | ||
273 | /* Reference to global offset table. */ | |
274 | /* FIXME: This is not handled correctly. */ | |
275 | HOWTO (R_MIPS_GOT16, /* type */ | |
276 | 0, /* rightshift */ | |
277 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
278 | 16, /* bitsize */ | |
279 | false, /* pc_relative */ | |
280 | 0, /* bitpos */ | |
281 | complain_overflow_signed, /* complain_on_overflow */ | |
6e07e54f | 282 | mips_elf_got16_reloc, /* special_function */ |
b3c0fc57 ILT |
283 | "R_MIPS_GOT16", /* name */ |
284 | false, /* partial_inplace */ | |
285 | 0, /* src_mask */ | |
286 | 0xffff, /* dst_mask */ | |
287 | false), /* pcrel_offset */ | |
288 | ||
289 | /* 16 bit PC relative reference. */ | |
290 | HOWTO (R_MIPS_PC16, /* type */ | |
291 | 0, /* rightshift */ | |
292 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
293 | 16, /* bitsize */ | |
294 | true, /* pc_relative */ | |
295 | 0, /* bitpos */ | |
296 | complain_overflow_signed, /* complain_on_overflow */ | |
297 | bfd_elf_generic_reloc, /* special_function */ | |
298 | "R_MIPS_PC16", /* name */ | |
299 | true, /* partial_inplace */ | |
300 | 0xffff, /* src_mask */ | |
301 | 0xffff, /* dst_mask */ | |
302 | false), /* pcrel_offset */ | |
303 | ||
304 | /* 16 bit call through global offset table. */ | |
305 | /* FIXME: This is not handled correctly. */ | |
306 | HOWTO (R_MIPS_CALL16, /* type */ | |
307 | 0, /* rightshift */ | |
308 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
309 | 16, /* bitsize */ | |
310 | false, /* pc_relative */ | |
311 | 0, /* bitpos */ | |
312 | complain_overflow_signed, /* complain_on_overflow */ | |
313 | bfd_elf_generic_reloc, /* special_function */ | |
314 | "R_MIPS_CALL16", /* name */ | |
315 | false, /* partial_inplace */ | |
316 | 0, /* src_mask */ | |
317 | 0xffff, /* dst_mask */ | |
318 | false), /* pcrel_offset */ | |
319 | ||
320 | /* 32 bit GP relative reference. */ | |
321 | /* FIXME: This is not handled correctly. */ | |
322 | HOWTO (R_MIPS_GPREL32, /* type */ | |
323 | 0, /* rightshift */ | |
324 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
325 | 32, /* bitsize */ | |
326 | false, /* pc_relative */ | |
327 | 0, /* bitpos */ | |
328 | complain_overflow_bitfield, /* complain_on_overflow */ | |
329 | bfd_elf_generic_reloc, /* special_function */ | |
330 | "R_MIPS_GPREL32", /* name */ | |
331 | true, /* partial_inplace */ | |
332 | 0xffffffff, /* src_mask */ | |
333 | 0xffffffff, /* dst_mask */ | |
6a5848cd ILT |
334 | false), /* pcrel_offset */ |
335 | ||
336 | /* The remaining relocs are defined on Irix 5, although they are | |
337 | not defined by the ABI. */ | |
338 | { 13 }, | |
339 | { 14 }, | |
340 | { 15 }, | |
341 | ||
342 | /* A 5 bit shift field. */ | |
343 | HOWTO (R_MIPS_SHIFT5, /* type */ | |
344 | 0, /* rightshift */ | |
345 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
346 | 5, /* bitsize */ | |
347 | false, /* pc_relative */ | |
348 | 6, /* bitpos */ | |
349 | complain_overflow_bitfield, /* complain_on_overflow */ | |
350 | bfd_elf_generic_reloc, /* special_function */ | |
351 | "R_MIPS_SHIFT5", /* name */ | |
352 | true, /* partial_inplace */ | |
353 | 0x000007c0, /* src_mask */ | |
354 | 0x000007c0, /* dst_mask */ | |
355 | false), /* pcrel_offset */ | |
356 | ||
357 | /* A 6 bit shift field. */ | |
358 | /* FIXME: This is not handled correctly; a special function is | |
359 | needed to put the most significant bit in the right place. */ | |
360 | HOWTO (R_MIPS_SHIFT6, /* type */ | |
361 | 0, /* rightshift */ | |
362 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
363 | 6, /* bitsize */ | |
364 | false, /* pc_relative */ | |
365 | 6, /* bitpos */ | |
366 | complain_overflow_bitfield, /* complain_on_overflow */ | |
367 | bfd_elf_generic_reloc, /* special_function */ | |
368 | "R_MIPS_SHIFT6", /* name */ | |
369 | true, /* partial_inplace */ | |
370 | 0x000007c4, /* src_mask */ | |
371 | 0x000007c4, /* dst_mask */ | |
372 | false), /* pcrel_offset */ | |
373 | ||
374 | /* A 64 bit relocation. Presumably not used in 32 bit ELF. */ | |
375 | { R_MIPS_64 }, | |
376 | ||
377 | /* Displacement in the global offset table. */ | |
378 | /* FIXME: Not handled correctly. */ | |
379 | HOWTO (R_MIPS_GOT_DISP, /* 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_bitfield, /* complain_on_overflow */ | |
386 | bfd_elf_generic_reloc, /* special_function */ | |
387 | "R_MIPS_GOT_DISP", /* name */ | |
388 | true, /* partial_inplace */ | |
389 | 0x0000ffff, /* src_mask */ | |
390 | 0x0000ffff, /* dst_mask */ | |
391 | false), /* pcrel_offset */ | |
392 | ||
393 | /* Displacement to page pointer in the global offset table. */ | |
394 | /* FIXME: Not handled correctly. */ | |
395 | HOWTO (R_MIPS_GOT_PAGE, /* type */ | |
396 | 0, /* rightshift */ | |
397 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
398 | 16, /* bitsize */ | |
399 | false, /* pc_relative */ | |
400 | 0, /* bitpos */ | |
401 | complain_overflow_bitfield, /* complain_on_overflow */ | |
402 | bfd_elf_generic_reloc, /* special_function */ | |
403 | "R_MIPS_GOT_PAGE", /* name */ | |
404 | true, /* partial_inplace */ | |
405 | 0x0000ffff, /* src_mask */ | |
406 | 0x0000ffff, /* dst_mask */ | |
407 | false), /* pcrel_offset */ | |
408 | ||
409 | /* Offset from page pointer in the global offset table. */ | |
410 | /* FIXME: Not handled correctly. */ | |
411 | HOWTO (R_MIPS_GOT_OFST, /* type */ | |
412 | 0, /* rightshift */ | |
413 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
414 | 16, /* bitsize */ | |
415 | false, /* pc_relative */ | |
416 | 0, /* bitpos */ | |
417 | complain_overflow_bitfield, /* complain_on_overflow */ | |
418 | bfd_elf_generic_reloc, /* special_function */ | |
419 | "R_MIPS_GOT_OFST", /* name */ | |
420 | true, /* partial_inplace */ | |
421 | 0x0000ffff, /* src_mask */ | |
422 | 0x0000ffff, /* dst_mask */ | |
423 | false), /* pcrel_offset */ | |
424 | ||
425 | /* High 16 bits of displacement in global offset table. */ | |
426 | /* FIXME: Not handled correctly. */ | |
427 | HOWTO (R_MIPS_GOT_HI16, /* type */ | |
428 | 0, /* rightshift */ | |
429 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
430 | 16, /* bitsize */ | |
431 | false, /* pc_relative */ | |
432 | 0, /* bitpos */ | |
433 | complain_overflow_dont, /* complain_on_overflow */ | |
434 | bfd_elf_generic_reloc, /* special_function */ | |
435 | "R_MIPS_GOT_HI16", /* name */ | |
436 | true, /* partial_inplace */ | |
437 | 0x0000ffff, /* src_mask */ | |
438 | 0x0000ffff, /* dst_mask */ | |
439 | false), /* pcrel_offset */ | |
440 | ||
441 | /* Low 16 bits of displacement in global offset table. */ | |
442 | /* FIXME: Not handled correctly. */ | |
443 | HOWTO (R_MIPS_GOT_LO16, /* type */ | |
444 | 0, /* rightshift */ | |
445 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
446 | 16, /* bitsize */ | |
447 | false, /* pc_relative */ | |
448 | 0, /* bitpos */ | |
449 | complain_overflow_dont, /* complain_on_overflow */ | |
450 | bfd_elf_generic_reloc, /* special_function */ | |
451 | "R_MIPS_GOT_LO16", /* name */ | |
452 | true, /* partial_inplace */ | |
453 | 0x0000ffff, /* src_mask */ | |
454 | 0x0000ffff, /* dst_mask */ | |
455 | false), /* pcrel_offset */ | |
456 | ||
457 | /* 64 bit subtraction. Presumably not used in 32 bit ELF. */ | |
458 | { R_MIPS_SUB }, | |
459 | ||
460 | /* Used to cause the linker to insert and delete instructions? */ | |
461 | { R_MIPS_INSERT_A }, | |
462 | { R_MIPS_INSERT_B }, | |
463 | { R_MIPS_DELETE }, | |
464 | ||
465 | /* Get the higher values of a 64 bit addend. Presumably not used in | |
466 | 32 bit ELF. */ | |
467 | { R_MIPS_HIGHER }, | |
468 | { R_MIPS_HIGHEST }, | |
469 | ||
470 | /* High 16 bits of displacement in global offset table. */ | |
471 | /* FIXME: Not handled correctly. */ | |
472 | HOWTO (R_MIPS_CALL_HI16, /* type */ | |
473 | 0, /* rightshift */ | |
474 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
475 | 16, /* bitsize */ | |
476 | false, /* pc_relative */ | |
477 | 0, /* bitpos */ | |
478 | complain_overflow_dont, /* complain_on_overflow */ | |
479 | bfd_elf_generic_reloc, /* special_function */ | |
480 | "R_MIPS_CALL_HI16", /* name */ | |
481 | true, /* partial_inplace */ | |
482 | 0x0000ffff, /* src_mask */ | |
483 | 0x0000ffff, /* dst_mask */ | |
484 | false), /* pcrel_offset */ | |
485 | ||
486 | /* Low 16 bits of displacement in global offset table. */ | |
487 | /* FIXME: Not handled correctly. */ | |
488 | HOWTO (R_MIPS_CALL_LO16, /* type */ | |
489 | 0, /* rightshift */ | |
490 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
491 | 16, /* bitsize */ | |
492 | false, /* pc_relative */ | |
493 | 0, /* bitpos */ | |
494 | complain_overflow_dont, /* complain_on_overflow */ | |
495 | bfd_elf_generic_reloc, /* special_function */ | |
496 | "R_MIPS_CALL_LO16", /* name */ | |
497 | true, /* partial_inplace */ | |
498 | 0x0000ffff, /* src_mask */ | |
499 | 0x0000ffff, /* dst_mask */ | |
b3c0fc57 ILT |
500 | false) /* pcrel_offset */ |
501 | }; | |
502 | ||
503 | /* Do a R_MIPS_HI16 relocation. This has to be done in combination | |
504 | with a R_MIPS_LO16 reloc, because there is a carry from the LO16 to | |
505 | the HI16. Here we just save the information we need; we do the | |
506 | actual relocation when we see the LO16. MIPS ELF requires that the | |
507 | LO16 immediately follow the HI16, so this ought to work. */ | |
508 | ||
509 | static bfd_byte *mips_hi16_addr; | |
510 | static bfd_vma mips_hi16_addend; | |
511 | ||
512 | static bfd_reloc_status_type | |
513 | mips_elf_hi16_reloc (abfd, | |
514 | reloc_entry, | |
515 | symbol, | |
516 | data, | |
517 | input_section, | |
6e07e54f ILT |
518 | output_bfd, |
519 | error_message) | |
b3c0fc57 ILT |
520 | bfd *abfd; |
521 | arelent *reloc_entry; | |
522 | asymbol *symbol; | |
523 | PTR data; | |
524 | asection *input_section; | |
525 | bfd *output_bfd; | |
6e07e54f | 526 | char **error_message; |
b3c0fc57 ILT |
527 | { |
528 | bfd_reloc_status_type ret; | |
529 | bfd_vma relocation; | |
530 | ||
b3c0fc57 ILT |
531 | /* If we're relocating, and this an external symbol, we don't want |
532 | to change anything. */ | |
533 | if (output_bfd != (bfd *) NULL | |
534 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
535 | && reloc_entry->addend == 0) | |
536 | { | |
537 | reloc_entry->address += input_section->output_offset; | |
538 | return bfd_reloc_ok; | |
539 | } | |
540 | ||
6e07e54f ILT |
541 | /* FIXME: The symbol _gp_disp requires special handling, which we do |
542 | not do. */ | |
543 | if (strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0) | |
544 | abort (); | |
545 | ||
b3c0fc57 | 546 | ret = bfd_reloc_ok; |
24f13b03 | 547 | if (bfd_is_und_section (symbol->section) |
b3c0fc57 ILT |
548 | && output_bfd == (bfd *) NULL) |
549 | ret = bfd_reloc_undefined; | |
550 | ||
551 | if (bfd_is_com_section (symbol->section)) | |
552 | relocation = 0; | |
553 | else | |
554 | relocation = symbol->value; | |
555 | ||
556 | relocation += symbol->section->output_section->vma; | |
557 | relocation += symbol->section->output_offset; | |
558 | relocation += reloc_entry->addend; | |
559 | ||
560 | if (reloc_entry->address > input_section->_cooked_size) | |
561 | return bfd_reloc_outofrange; | |
562 | ||
563 | /* Save the information, and let LO16 do the actual relocation. */ | |
564 | mips_hi16_addr = (bfd_byte *) data + reloc_entry->address; | |
565 | mips_hi16_addend = relocation; | |
566 | ||
567 | if (output_bfd != (bfd *) NULL) | |
568 | reloc_entry->address += input_section->output_offset; | |
569 | ||
570 | return ret; | |
571 | } | |
572 | ||
573 | /* Do a R_MIPS_LO16 relocation. This is a straightforward 16 bit | |
574 | inplace relocation; this function exists in order to do the | |
575 | R_MIPS_HI16 relocation described above. */ | |
576 | ||
577 | static bfd_reloc_status_type | |
578 | mips_elf_lo16_reloc (abfd, | |
579 | reloc_entry, | |
580 | symbol, | |
581 | data, | |
582 | input_section, | |
6e07e54f ILT |
583 | output_bfd, |
584 | error_message) | |
b3c0fc57 ILT |
585 | bfd *abfd; |
586 | arelent *reloc_entry; | |
587 | asymbol *symbol; | |
588 | PTR data; | |
589 | asection *input_section; | |
590 | bfd *output_bfd; | |
6e07e54f | 591 | char **error_message; |
b3c0fc57 ILT |
592 | { |
593 | /* FIXME: The symbol _gp_disp requires special handling, which we do | |
594 | not do. */ | |
6e07e54f ILT |
595 | if (output_bfd == (bfd *) NULL |
596 | && strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0) | |
b3c0fc57 ILT |
597 | abort (); |
598 | ||
599 | if (mips_hi16_addr != (bfd_byte *) NULL) | |
600 | { | |
601 | unsigned long insn; | |
602 | unsigned long val; | |
603 | unsigned long vallo; | |
604 | ||
605 | /* Do the HI16 relocation. Note that we actually don't need to | |
606 | know anything about the LO16 itself, except where to find the | |
607 | low 16 bits of the addend needed by the LO16. */ | |
608 | insn = bfd_get_32 (abfd, mips_hi16_addr); | |
609 | vallo = (bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address) | |
610 | & 0xffff); | |
611 | val = ((insn & 0xffff) << 16) + vallo; | |
612 | val += mips_hi16_addend; | |
613 | ||
614 | /* The low order 16 bits are always treated as a signed value. | |
615 | Therefore, a negative value in the low order bits requires an | |
616 | adjustment in the high order bits. We need to make this | |
617 | adjustment in two ways: once for the bits we took from the | |
618 | data, and once for the bits we are putting back in to the | |
619 | data. */ | |
620 | if ((vallo & 0x8000) != 0) | |
621 | val -= 0x10000; | |
622 | if ((val & 0x8000) != 0) | |
623 | val += 0x10000; | |
624 | ||
625 | insn = (insn &~ 0xffff) | ((val >> 16) & 0xffff); | |
626 | bfd_put_32 (abfd, insn, mips_hi16_addr); | |
627 | ||
628 | mips_hi16_addr = (bfd_byte *) NULL; | |
629 | } | |
630 | ||
631 | /* Now do the LO16 reloc in the usual way. */ | |
632 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, | |
6e07e54f ILT |
633 | input_section, output_bfd, error_message); |
634 | } | |
635 | ||
636 | /* Do a R_MIPS_GOT16 reloc. This is a reloc against the global offset | |
637 | table used for PIC code. If the symbol is an external symbol, the | |
638 | instruction is modified to contain the offset of the appropriate | |
639 | entry in the global offset table. If the symbol is a section | |
640 | symbol, the next reloc is a R_MIPS_LO16 reloc. The two 16 bit | |
641 | addends are combined to form the real addend against the section | |
642 | symbol; the GOT16 is modified to contain the offset of an entry in | |
643 | the global offset table, and the LO16 is modified to offset it | |
644 | appropriately. Thus an offset larger than 16 bits requires a | |
645 | modified value in the global offset table. | |
646 | ||
647 | This implementation suffices for the assembler, but the linker does | |
648 | not yet know how to create global offset tables. */ | |
649 | ||
650 | static bfd_reloc_status_type | |
651 | mips_elf_got16_reloc (abfd, | |
652 | reloc_entry, | |
653 | symbol, | |
654 | data, | |
655 | input_section, | |
656 | output_bfd, | |
657 | error_message) | |
658 | bfd *abfd; | |
659 | arelent *reloc_entry; | |
660 | asymbol *symbol; | |
661 | PTR data; | |
662 | asection *input_section; | |
663 | bfd *output_bfd; | |
664 | char **error_message; | |
665 | { | |
666 | /* If we're relocating, and this an external symbol, we don't want | |
667 | to change anything. */ | |
668 | if (output_bfd != (bfd *) NULL | |
669 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
670 | && reloc_entry->addend == 0) | |
671 | { | |
672 | reloc_entry->address += input_section->output_offset; | |
673 | return bfd_reloc_ok; | |
674 | } | |
675 | ||
676 | /* If we're relocating, and this is a local symbol, we can handle it | |
677 | just like HI16. */ | |
678 | if (output_bfd != (bfd *) NULL | |
679 | && (symbol->flags & BSF_SECTION_SYM) != 0) | |
680 | return mips_elf_hi16_reloc (abfd, reloc_entry, symbol, data, | |
681 | input_section, output_bfd, error_message); | |
682 | ||
683 | abort (); | |
b3c0fc57 ILT |
684 | } |
685 | ||
686 | /* Do a R_MIPS_GPREL16 relocation. This is a 16 bit value which must | |
687 | become the offset from the gp register. This function also handles | |
688 | R_MIPS_LITERAL relocations, although those can be handled more | |
689 | cleverly because the entries in the .lit8 and .lit4 sections can be | |
690 | merged. */ | |
691 | ||
a16fcab3 KR |
692 | static bfd_reloc_status_type gprel16_with_gp PARAMS ((bfd *, asymbol *, |
693 | arelent *, asection *, | |
694 | boolean, PTR, bfd_vma)); | |
695 | ||
b3c0fc57 ILT |
696 | static bfd_reloc_status_type |
697 | mips_elf_gprel16_reloc (abfd, | |
698 | reloc_entry, | |
699 | symbol, | |
700 | data, | |
701 | input_section, | |
6e07e54f ILT |
702 | output_bfd, |
703 | error_message) | |
b3c0fc57 ILT |
704 | bfd *abfd; |
705 | arelent *reloc_entry; | |
706 | asymbol *symbol; | |
707 | PTR data; | |
708 | asection *input_section; | |
709 | bfd *output_bfd; | |
6e07e54f | 710 | char **error_message; |
b3c0fc57 ILT |
711 | { |
712 | boolean relocateable; | |
b3c0fc57 ILT |
713 | |
714 | /* If we're relocating, and this is an external symbol with no | |
715 | addend, we don't want to change anything. We will only have an | |
716 | addend if this is a newly created reloc, not read from an ELF | |
717 | file. */ | |
718 | if (output_bfd != (bfd *) NULL | |
719 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
720 | && reloc_entry->addend == 0) | |
721 | { | |
722 | reloc_entry->address += input_section->output_offset; | |
723 | return bfd_reloc_ok; | |
724 | } | |
725 | ||
726 | if (output_bfd != (bfd *) NULL) | |
727 | relocateable = true; | |
728 | else | |
729 | { | |
730 | relocateable = false; | |
731 | output_bfd = symbol->section->output_section->owner; | |
732 | } | |
733 | ||
24f13b03 | 734 | if (bfd_is_und_section (symbol->section) |
b3c0fc57 ILT |
735 | && relocateable == false) |
736 | return bfd_reloc_undefined; | |
737 | ||
a16fcab3 KR |
738 | /* Some of the code below assumes the output bfd is ELF too. */ |
739 | if (output_bfd->xvec->flavour != bfd_target_elf_flavour) | |
740 | abort (); | |
741 | ||
b3c0fc57 ILT |
742 | /* We have to figure out the gp value, so that we can adjust the |
743 | symbol value correctly. We look up the symbol _gp in the output | |
744 | BFD. If we can't find it, we're stuck. We cache it in the ELF | |
745 | target data. We don't need to adjust the symbol value for an | |
746 | external symbol if we are producing relocateable output. */ | |
747 | if (elf_gp (output_bfd) == 0 | |
748 | && (relocateable == false | |
749 | || (symbol->flags & BSF_SECTION_SYM) != 0)) | |
750 | { | |
751 | if (relocateable != false) | |
752 | { | |
753 | /* Make up a value. */ | |
754 | elf_gp (output_bfd) = | |
755 | symbol->section->output_section->vma + 0x4000; | |
756 | } | |
757 | else | |
758 | { | |
759 | unsigned int count; | |
760 | asymbol **sym; | |
761 | unsigned int i; | |
762 | ||
763 | count = bfd_get_symcount (output_bfd); | |
764 | sym = bfd_get_outsymbols (output_bfd); | |
765 | ||
766 | if (sym == (asymbol **) NULL) | |
767 | i = count; | |
768 | else | |
769 | { | |
770 | for (i = 0; i < count; i++, sym++) | |
771 | { | |
772 | register CONST char *name; | |
773 | ||
774 | name = bfd_asymbol_name (*sym); | |
775 | if (*name == '_' && strcmp (name, "_gp") == 0) | |
776 | { | |
777 | elf_gp (output_bfd) = bfd_asymbol_value (*sym); | |
778 | break; | |
779 | } | |
780 | } | |
781 | } | |
782 | ||
783 | if (i >= count) | |
784 | { | |
785 | /* Only get the error once. */ | |
786 | elf_gp (output_bfd) = 4; | |
6e07e54f ILT |
787 | *error_message = |
788 | (char *) "GP relative relocation when _gp not defined"; | |
b3c0fc57 ILT |
789 | return bfd_reloc_dangerous; |
790 | } | |
791 | } | |
792 | } | |
793 | ||
a16fcab3 KR |
794 | return gprel16_with_gp (symbol, reloc_entry, input_section, relocateable, |
795 | data, elf_gp (output_bfd)); | |
796 | } | |
797 | ||
798 | static bfd_reloc_status_type | |
799 | gprel16_with_gp (abfd, symbol, reloc_entry, input_section, relocateable, data, | |
800 | gp) | |
801 | bfd *abfd; | |
802 | asymbol *symbol; | |
803 | arelent *reloc_entry; | |
804 | asection *input_section; | |
805 | boolean relocateable; | |
806 | PTR data; | |
807 | bfd_vma gp; | |
808 | { | |
809 | bfd_vma relocation; | |
810 | unsigned long insn; | |
811 | unsigned long val; | |
812 | ||
b3c0fc57 ILT |
813 | if (bfd_is_com_section (symbol->section)) |
814 | relocation = 0; | |
815 | else | |
816 | relocation = symbol->value; | |
817 | ||
818 | relocation += symbol->section->output_section->vma; | |
819 | relocation += symbol->section->output_offset; | |
820 | ||
821 | if (reloc_entry->address > input_section->_cooked_size) | |
822 | return bfd_reloc_outofrange; | |
823 | ||
824 | insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); | |
825 | ||
826 | /* Set val to the offset into the section or symbol. */ | |
827 | val = ((insn & 0xffff) + reloc_entry->addend) & 0xffff; | |
828 | if (val & 0x8000) | |
829 | val -= 0x10000; | |
830 | ||
831 | /* Adjust val for the final section location and GP value. If we | |
832 | are producing relocateable output, we don't want to do this for | |
833 | an external symbol. */ | |
834 | if (relocateable == false | |
835 | || (symbol->flags & BSF_SECTION_SYM) != 0) | |
a16fcab3 | 836 | val += relocation - gp; |
b3c0fc57 ILT |
837 | |
838 | insn = (insn &~ 0xffff) | (val & 0xffff); | |
839 | bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); | |
840 | ||
841 | if (relocateable != false) | |
842 | reloc_entry->address += input_section->output_offset; | |
843 | ||
844 | /* Make sure it fit in 16 bits. */ | |
845 | if (val >= 0x8000 && val < 0xffff8000) | |
6e07e54f | 846 | return bfd_reloc_overflow; |
b3c0fc57 ILT |
847 | |
848 | return bfd_reloc_ok; | |
849 | } | |
6b4b4d17 | 850 | |
b3c0fc57 | 851 | /* A mapping from BFD reloc types to MIPS ELF reloc types. */ |
6b4b4d17 | 852 | |
b3c0fc57 ILT |
853 | struct elf_reloc_map { |
854 | bfd_reloc_code_real_type bfd_reloc_val; | |
855 | enum reloc_type elf_reloc_val; | |
856 | }; | |
857 | ||
858 | static CONST struct elf_reloc_map mips_reloc_map[] = | |
859 | { | |
860 | { BFD_RELOC_NONE, R_MIPS_NONE, }, | |
861 | { BFD_RELOC_16, R_MIPS_16 }, | |
862 | { BFD_RELOC_32, R_MIPS_32 }, | |
863 | { BFD_RELOC_CTOR, R_MIPS_32 }, | |
864 | { BFD_RELOC_32_PCREL, R_MIPS_REL32 }, | |
865 | { BFD_RELOC_MIPS_JMP, R_MIPS_26 }, | |
866 | { BFD_RELOC_HI16_S, R_MIPS_HI16 }, | |
867 | { BFD_RELOC_LO16, R_MIPS_LO16 }, | |
868 | { BFD_RELOC_MIPS_GPREL, R_MIPS_GPREL16 }, | |
869 | { BFD_RELOC_MIPS_LITERAL, R_MIPS_LITERAL }, | |
870 | { BFD_RELOC_MIPS_GOT16, R_MIPS_GOT16 }, | |
871 | { BFD_RELOC_16_PCREL, R_MIPS_PC16 }, | |
872 | { BFD_RELOC_MIPS_CALL16, R_MIPS_CALL16 }, | |
873 | { BFD_RELOC_MIPS_GPREL32, R_MIPS_GPREL32 } | |
874 | }; | |
875 | ||
876 | /* Given a BFD reloc type, return a howto structure. */ | |
877 | ||
16fe8950 | 878 | static reloc_howto_type * |
b3c0fc57 ILT |
879 | bfd_elf32_bfd_reloc_type_lookup (abfd, code) |
880 | bfd *abfd; | |
881 | bfd_reloc_code_real_type code; | |
882 | { | |
883 | int i; | |
884 | ||
885 | for (i = 0; i < sizeof (mips_reloc_map) / sizeof (struct elf_reloc_map); i++) | |
886 | { | |
887 | if (mips_reloc_map[i].bfd_reloc_val == code) | |
888 | return &elf_mips_howto_table[(int) mips_reloc_map[i].elf_reloc_val]; | |
889 | } | |
890 | return NULL; | |
891 | } | |
892 | ||
893 | /* Given a MIPS reloc type, fill in an arelent structure. */ | |
894 | ||
895 | static void | |
896 | mips_info_to_howto_rel (abfd, cache_ptr, dst) | |
897 | bfd *abfd; | |
898 | arelent *cache_ptr; | |
899 | Elf32_Internal_Rel *dst; | |
900 | { | |
901 | unsigned int r_type; | |
902 | ||
903 | r_type = ELF32_R_TYPE (dst->r_info); | |
904 | BFD_ASSERT (r_type < (unsigned int) R_MIPS_max); | |
905 | cache_ptr->howto = &elf_mips_howto_table[r_type]; | |
906 | ||
907 | /* The addend for a GPREL16 or LITERAL relocation comes from the GP | |
908 | value for the object file. We get the addend now, rather than | |
909 | when we do the relocation, because the symbol manipulations done | |
910 | by the linker may cause us to lose track of the input BFD. */ | |
911 | if (((*cache_ptr->sym_ptr_ptr)->flags & BSF_SECTION_SYM) != 0 | |
912 | && (r_type == (unsigned int) R_MIPS_GPREL16 | |
913 | || r_type == (unsigned int) R_MIPS_LITERAL)) | |
914 | cache_ptr->addend = elf_gp (abfd); | |
915 | } | |
916 | \f | |
917 | /* A .reginfo section holds a single Elf32_RegInfo structure. These | |
918 | routines swap this structure in and out. They are used outside of | |
919 | BFD, so they are globally visible. */ | |
920 | ||
921 | void | |
922 | bfd_mips_elf32_swap_reginfo_in (abfd, ex, in) | |
923 | bfd *abfd; | |
924 | const Elf32_External_RegInfo *ex; | |
925 | Elf32_RegInfo *in; | |
926 | { | |
927 | in->ri_gprmask = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_gprmask); | |
928 | in->ri_cprmask[0] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[0]); | |
929 | in->ri_cprmask[1] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[1]); | |
930 | in->ri_cprmask[2] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[2]); | |
931 | in->ri_cprmask[3] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[3]); | |
932 | in->ri_gp_value = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_gp_value); | |
933 | } | |
934 | ||
935 | void | |
936 | bfd_mips_elf32_swap_reginfo_out (abfd, in, ex) | |
937 | bfd *abfd; | |
938 | const Elf32_RegInfo *in; | |
939 | Elf32_External_RegInfo *ex; | |
940 | { | |
941 | bfd_h_put_32 (abfd, (bfd_vma) in->ri_gprmask, | |
942 | (bfd_byte *) ex->ri_gprmask); | |
943 | bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[0], | |
944 | (bfd_byte *) ex->ri_cprmask[0]); | |
945 | bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[1], | |
946 | (bfd_byte *) ex->ri_cprmask[1]); | |
947 | bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[2], | |
948 | (bfd_byte *) ex->ri_cprmask[2]); | |
949 | bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[3], | |
950 | (bfd_byte *) ex->ri_cprmask[3]); | |
951 | bfd_h_put_32 (abfd, (bfd_vma) in->ri_gp_value, | |
952 | (bfd_byte *) ex->ri_gp_value); | |
953 | } | |
aac6b32f ILT |
954 | |
955 | /* Swap an entry in a .gptab section. Note that these routines rely | |
956 | on the equivalence of the two elements of the union. */ | |
957 | ||
958 | static void | |
959 | bfd_mips_elf32_swap_gptab_in (abfd, ex, in) | |
960 | bfd *abfd; | |
961 | const Elf32_External_gptab *ex; | |
962 | Elf32_gptab *in; | |
963 | { | |
964 | in->gt_entry.gt_g_value = bfd_h_get_32 (abfd, ex->gt_entry.gt_g_value); | |
965 | in->gt_entry.gt_bytes = bfd_h_get_32 (abfd, ex->gt_entry.gt_bytes); | |
966 | } | |
967 | ||
968 | static void | |
969 | bfd_mips_elf32_swap_gptab_out (abfd, in, ex) | |
970 | bfd *abfd; | |
971 | const Elf32_gptab *in; | |
972 | Elf32_External_gptab *ex; | |
973 | { | |
974 | bfd_h_put_32 (abfd, (bfd_vma) in->gt_entry.gt_g_value, | |
975 | ex->gt_entry.gt_g_value); | |
976 | bfd_h_put_32 (abfd, (bfd_vma) in->gt_entry.gt_bytes, | |
977 | ex->gt_entry.gt_bytes); | |
978 | } | |
b3c0fc57 | 979 | \f |
6e07e54f ILT |
980 | /* Determine whether a symbol is global for the purposes of splitting |
981 | the symbol table into global symbols and local symbols. At least | |
982 | on Irix 5, this split must be between section symbols and all other | |
983 | symbols. On most ELF targets the split is between static symbols | |
984 | and externally visible symbols. */ | |
985 | ||
986 | /*ARGSUSED*/ | |
987 | static boolean | |
988 | mips_elf_sym_is_global (abfd, sym) | |
989 | bfd *abfd; | |
990 | asymbol *sym; | |
991 | { | |
992 | return (sym->flags & BSF_SECTION_SYM) == 0 ? true : false; | |
993 | } | |
994 | \f | |
995 | /* Set the right machine number for a MIPS ELF file. */ | |
996 | ||
997 | static boolean | |
998 | mips_elf_object_p (abfd) | |
999 | bfd *abfd; | |
1000 | { | |
1001 | switch (elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) | |
1002 | { | |
1003 | default: | |
1004 | case E_MIPS_ARCH_1: | |
1005 | /* Just use the default, which was set in elfcode.h. */ | |
1006 | break; | |
1007 | ||
1008 | case E_MIPS_ARCH_2: | |
1009 | (void) bfd_default_set_arch_mach (abfd, bfd_arch_mips, 6000); | |
1010 | break; | |
1011 | ||
1012 | case E_MIPS_ARCH_3: | |
1013 | (void) bfd_default_set_arch_mach (abfd, bfd_arch_mips, 4000); | |
1014 | break; | |
1015 | } | |
1016 | ||
aac6b32f ILT |
1017 | /* Irix 5 is broken. Object file symbol tables are not always |
1018 | sorted correctly such that local symbols precede global symbols, | |
1019 | and the sh_info field in the symbol table is not always right. | |
1020 | We try to quickly check whether the symbol table is broken for | |
1021 | this BFD, and, if it is, we set elf_bad_symtab in tdata. */ | |
1022 | if (elf_onesymtab (abfd) != 0) | |
1023 | { | |
1024 | Elf_Internal_Shdr *symtab_hdr; | |
1025 | Elf32_External_Sym esym; | |
1026 | ||
1027 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1028 | if (bfd_seek (abfd, | |
1029 | (symtab_hdr->sh_offset | |
1030 | + symtab_hdr->sh_size | |
1031 | - sizeof (Elf32_External_Sym)), | |
1032 | SEEK_SET) != 0 | |
1033 | || (bfd_read ((PTR) &esym, 1, sizeof (Elf32_External_Sym), abfd) | |
1034 | != sizeof (Elf32_External_Sym))) | |
1035 | return false; | |
1036 | if (ELF_ST_BIND (bfd_h_get_8 (abfd, (bfd_byte *) esym.st_info)) | |
1037 | == STB_LOCAL) | |
1038 | elf_bad_symtab (abfd) = true; | |
1039 | } | |
1040 | ||
6e07e54f ILT |
1041 | return true; |
1042 | } | |
1043 | ||
1044 | /* The final processing done just before writing out a MIPS ELF object | |
1045 | file. This gets the MIPS architecture right based on the machine | |
1046 | number. */ | |
1047 | ||
24f13b03 | 1048 | /*ARGSUSED*/ |
6e07e54f | 1049 | static void |
24f13b03 | 1050 | mips_elf_final_write_processing (abfd, linker) |
6e07e54f | 1051 | bfd *abfd; |
24f13b03 | 1052 | boolean linker; |
6e07e54f ILT |
1053 | { |
1054 | unsigned long val; | |
aac6b32f ILT |
1055 | unsigned int i; |
1056 | Elf_Internal_Shdr **hdrpp; | |
6e07e54f ILT |
1057 | |
1058 | switch (bfd_get_mach (abfd)) | |
1059 | { | |
1060 | case 3000: | |
1061 | val = E_MIPS_ARCH_1; | |
1062 | break; | |
1063 | ||
1064 | case 6000: | |
1065 | val = E_MIPS_ARCH_2; | |
1066 | break; | |
1067 | ||
1068 | case 4000: | |
1069 | val = E_MIPS_ARCH_3; | |
1070 | break; | |
1071 | ||
1072 | default: | |
1073 | return; | |
1074 | } | |
1075 | ||
1076 | elf_elfheader (abfd)->e_flags &=~ EF_MIPS_ARCH; | |
1077 | elf_elfheader (abfd)->e_flags |= val; | |
aac6b32f ILT |
1078 | |
1079 | /* Set the sh_info field for .gptab sections. */ | |
1080 | for (i = 1, hdrpp = elf_elfsections (abfd) + 1; | |
1081 | i < elf_elfheader (abfd)->e_shnum; | |
1082 | i++, hdrpp++) | |
1083 | { | |
1084 | if ((*hdrpp)->sh_type == SHT_MIPS_GPTAB) | |
1085 | { | |
1086 | const char *name; | |
1087 | asection *sec; | |
1088 | ||
24f13b03 ILT |
1089 | BFD_ASSERT ((*hdrpp)->bfd_section != NULL); |
1090 | name = bfd_get_section_name (abfd, (*hdrpp)->bfd_section); | |
aac6b32f ILT |
1091 | BFD_ASSERT (name != NULL |
1092 | && strncmp (name, ".gptab.", sizeof ".gptab." - 1) == 0); | |
1093 | sec = bfd_get_section_by_name (abfd, name + sizeof ".gptab" - 1); | |
1094 | BFD_ASSERT (sec != NULL); | |
1095 | (*hdrpp)->sh_info = elf_section_data (sec)->this_idx; | |
1096 | } | |
1097 | } | |
6e07e54f ILT |
1098 | } |
1099 | \f | |
b3c0fc57 ILT |
1100 | /* Handle a MIPS specific section when reading an object file. This |
1101 | is called when elfcode.h finds a section with an unknown type. | |
1102 | FIXME: We need to handle the SHF_MIPS_GPREL flag, but I'm not sure | |
1103 | how to. */ | |
1104 | ||
1105 | static boolean | |
1106 | mips_elf_section_from_shdr (abfd, hdr, name) | |
1107 | bfd *abfd; | |
1108 | Elf32_Internal_Shdr *hdr; | |
1109 | char *name; | |
1110 | { | |
497c5434 ILT |
1111 | asection *newsect; |
1112 | ||
b3c0fc57 ILT |
1113 | /* There ought to be a place to keep ELF backend specific flags, but |
1114 | at the moment there isn't one. We just keep track of the | |
1115 | sections by their name, instead. Fortunately, the ABI gives | |
1116 | suggested names for all the MIPS specific sections, so we will | |
1117 | probably get away with this. */ | |
1118 | switch (hdr->sh_type) | |
1119 | { | |
1120 | case SHT_MIPS_LIBLIST: | |
1121 | if (strcmp (name, ".liblist") != 0) | |
1122 | return false; | |
1123 | break; | |
6a5848cd ILT |
1124 | case SHT_MIPS_MSYM: |
1125 | if (strcmp (name, ".msym") != 0) | |
1126 | return false; | |
1127 | break; | |
b3c0fc57 ILT |
1128 | case SHT_MIPS_CONFLICT: |
1129 | if (strcmp (name, ".conflict") != 0) | |
1130 | return false; | |
1131 | break; | |
1132 | case SHT_MIPS_GPTAB: | |
1133 | if (strncmp (name, ".gptab.", sizeof ".gptab." - 1) != 0) | |
1134 | return false; | |
1135 | break; | |
1136 | case SHT_MIPS_UCODE: | |
1137 | if (strcmp (name, ".ucode") != 0) | |
1138 | return false; | |
1139 | break; | |
1140 | case SHT_MIPS_DEBUG: | |
1141 | if (strcmp (name, ".mdebug") != 0) | |
1142 | return false; | |
1143 | break; | |
1144 | case SHT_MIPS_REGINFO: | |
1145 | if (strcmp (name, ".reginfo") != 0 | |
1146 | || hdr->sh_size != sizeof (Elf32_External_RegInfo)) | |
1147 | return false; | |
1148 | break; | |
6e07e54f ILT |
1149 | case SHT_MIPS_OPTIONS: |
1150 | if (strcmp (name, ".options") != 0) | |
1151 | return false; | |
1152 | break; | |
6a5848cd ILT |
1153 | case SHT_MIPS_DWARF: |
1154 | if (strncmp (name, ".debug_", sizeof ".debug_" - 1) != 0) | |
1155 | return false; | |
1156 | break; | |
1157 | case SHT_MIPS_EVENTS: | |
1158 | if (strncmp (name, ".MIPS.events.", sizeof ".MIPS.events." - 1) != 0) | |
1159 | return false; | |
1160 | break; | |
b3c0fc57 ILT |
1161 | default: |
1162 | return false; | |
1163 | } | |
1164 | ||
497c5434 ILT |
1165 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name)) |
1166 | return false; | |
24f13b03 | 1167 | newsect = hdr->bfd_section; |
b3c0fc57 | 1168 | |
497c5434 ILT |
1169 | if (hdr->sh_type == SHT_MIPS_DEBUG) |
1170 | { | |
1171 | if (! bfd_set_section_flags (abfd, newsect, | |
1172 | (bfd_get_section_flags (abfd, newsect) | |
1173 | | SEC_DEBUGGING))) | |
1174 | return false; | |
1175 | } | |
b3c0fc57 | 1176 | |
497c5434 | 1177 | /* FIXME: We should record sh_info for a .gptab section. */ |
b3c0fc57 | 1178 | |
497c5434 ILT |
1179 | /* For a .reginfo section, set the gp value in the tdata information |
1180 | from the contents of this section. We need the gp value while | |
1181 | processing relocs, so we just get it now. */ | |
1182 | if (hdr->sh_type == SHT_MIPS_REGINFO) | |
1183 | { | |
1184 | Elf32_External_RegInfo ext; | |
1185 | Elf32_RegInfo s; | |
b3c0fc57 | 1186 | |
497c5434 ILT |
1187 | if (! bfd_get_section_contents (abfd, newsect, (PTR) &ext, |
1188 | (file_ptr) 0, sizeof ext)) | |
1189 | return false; | |
1190 | bfd_mips_elf32_swap_reginfo_in (abfd, &ext, &s); | |
1191 | elf_gp (abfd) = s.ri_gp_value; | |
b3c0fc57 ILT |
1192 | } |
1193 | ||
1194 | return true; | |
1195 | } | |
1196 | ||
1197 | /* Set the correct type for a MIPS ELF section. We do this by the | |
1198 | section name, which is a hack, but ought to work. */ | |
1199 | ||
1200 | static boolean | |
1201 | mips_elf_fake_sections (abfd, hdr, sec) | |
1202 | bfd *abfd; | |
1203 | Elf32_Internal_Shdr *hdr; | |
1204 | asection *sec; | |
1205 | { | |
1206 | register const char *name; | |
1207 | ||
1208 | name = bfd_get_section_name (abfd, sec); | |
1209 | ||
1210 | if (strcmp (name, ".liblist") == 0) | |
1211 | { | |
1212 | hdr->sh_type = SHT_MIPS_LIBLIST; | |
1213 | hdr->sh_info = sec->_raw_size / sizeof (Elf32_Lib); | |
1214 | /* FIXME: Set the sh_link field. */ | |
1215 | } | |
6a5848cd ILT |
1216 | else if (strcmp (name, ".msym") == 0) |
1217 | { | |
1218 | hdr->sh_type = SHT_MIPS_MSYM; | |
1219 | hdr->sh_entsize = 8; | |
1220 | /* FIXME: Set the sh_info field. */ | |
1221 | } | |
b3c0fc57 ILT |
1222 | else if (strcmp (name, ".conflict") == 0) |
1223 | hdr->sh_type = SHT_MIPS_CONFLICT; | |
1224 | else if (strncmp (name, ".gptab.", sizeof ".gptab." - 1) == 0) | |
1225 | { | |
1226 | hdr->sh_type = SHT_MIPS_GPTAB; | |
aac6b32f ILT |
1227 | hdr->sh_entsize = sizeof (Elf32_External_gptab); |
1228 | /* The sh_info field is set in mips_elf_final_write_processing. */ | |
b3c0fc57 ILT |
1229 | } |
1230 | else if (strcmp (name, ".ucode") == 0) | |
1231 | hdr->sh_type = SHT_MIPS_UCODE; | |
1232 | else if (strcmp (name, ".mdebug") == 0) | |
6e07e54f ILT |
1233 | { |
1234 | hdr->sh_type = SHT_MIPS_DEBUG; | |
1235 | hdr->sh_entsize = 1; | |
1236 | } | |
b3c0fc57 ILT |
1237 | else if (strcmp (name, ".reginfo") == 0) |
1238 | { | |
1239 | hdr->sh_type = SHT_MIPS_REGINFO; | |
6e07e54f | 1240 | hdr->sh_entsize = 1; |
b3c0fc57 ILT |
1241 | |
1242 | /* Force the section size to the correct value, even if the | |
1243 | linker thinks it is larger. The link routine below will only | |
1244 | write out this much data for .reginfo. */ | |
1245 | hdr->sh_size = sec->_raw_size = sizeof (Elf32_External_RegInfo); | |
1246 | } | |
6e07e54f ILT |
1247 | else if (strcmp (name, ".options") == 0) |
1248 | { | |
1249 | hdr->sh_type = SHT_MIPS_OPTIONS; | |
1250 | hdr->sh_entsize = 1; | |
1251 | } | |
6a5848cd ILT |
1252 | else if (strncmp (name, ".debug_", sizeof ".debug_" - 1) == 0) |
1253 | hdr->sh_type = SHT_MIPS_DWARF; | |
1254 | else if (strncmp (name, ".MIPS.events.", sizeof ".MIPS.events." - 1) == 0) | |
1255 | hdr->sh_type = SHT_MIPS_EVENTS; | |
b3c0fc57 ILT |
1256 | |
1257 | return true; | |
1258 | } | |
1259 | ||
1260 | /* Given a BFD section, try to locate the corresponding ELF section | |
1261 | index. */ | |
1262 | ||
1263 | static boolean | |
1264 | mips_elf_section_from_bfd_section (abfd, hdr, sec, retval) | |
1265 | bfd *abfd; | |
1266 | Elf32_Internal_Shdr *hdr; | |
1267 | asection *sec; | |
1268 | int *retval; | |
1269 | { | |
1270 | if (strcmp (bfd_get_section_name (abfd, sec), ".scommon") == 0) | |
1271 | { | |
1272 | *retval = SHN_MIPS_SCOMMON; | |
1273 | return true; | |
1274 | } | |
82b1edf7 KR |
1275 | if (strcmp (bfd_get_section_name (abfd, sec), ".acommon") == 0) |
1276 | { | |
1277 | *retval = SHN_MIPS_ACOMMON; | |
1278 | return true; | |
1279 | } | |
b3c0fc57 ILT |
1280 | return false; |
1281 | } | |
1282 | ||
1283 | /* Work over a section just before writing it out. We update the GP | |
1284 | value in the .reginfo section based on the value we are using. | |
1285 | FIXME: We recognize sections that need the SHF_MIPS_GPREL flag by | |
1286 | name; there has to be a better way. */ | |
1287 | ||
1288 | static boolean | |
1289 | mips_elf_section_processing (abfd, hdr) | |
1290 | bfd *abfd; | |
1291 | Elf32_Internal_Shdr *hdr; | |
1292 | { | |
1293 | if (hdr->sh_type == SHT_MIPS_REGINFO) | |
1294 | { | |
1295 | bfd_byte buf[4]; | |
1296 | ||
1297 | BFD_ASSERT (hdr->sh_size == sizeof (Elf32_External_RegInfo)); | |
1298 | BFD_ASSERT (hdr->contents == NULL); | |
1299 | ||
1300 | if (bfd_seek (abfd, | |
1301 | hdr->sh_offset + sizeof (Elf32_External_RegInfo) - 4, | |
1302 | SEEK_SET) == -1) | |
1303 | return false; | |
1304 | bfd_h_put_32 (abfd, (bfd_vma) elf_gp (abfd), buf); | |
1305 | if (bfd_write (buf, (bfd_size_type) 1, (bfd_size_type) 4, abfd) != 4) | |
1306 | return false; | |
1307 | } | |
1308 | ||
24f13b03 | 1309 | if (hdr->bfd_section != NULL) |
b3c0fc57 | 1310 | { |
24f13b03 | 1311 | const char *name = bfd_get_section_name (abfd, hdr->bfd_section); |
b3c0fc57 ILT |
1312 | |
1313 | if (strcmp (name, ".sdata") == 0) | |
1314 | { | |
1315 | hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL; | |
1316 | hdr->sh_type = SHT_PROGBITS; | |
1317 | } | |
1318 | else if (strcmp (name, ".sbss") == 0) | |
1319 | { | |
1320 | hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL; | |
1321 | hdr->sh_type = SHT_NOBITS; | |
1322 | } | |
1323 | else if (strcmp (name, ".lit8") == 0 | |
1324 | || strcmp (name, ".lit4") == 0) | |
1325 | { | |
1326 | hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL; | |
1327 | hdr->sh_type = SHT_PROGBITS; | |
1328 | } | |
1329 | } | |
1330 | ||
1331 | return true; | |
1332 | } | |
1333 | \f | |
aac6b32f ILT |
1334 | /* MIPS ELF uses two common sections. One is the usual one, and the |
1335 | other is for small objects. All the small objects are kept | |
1336 | together, and then referenced via the gp pointer, which yields | |
1337 | faster assembler code. This is what we use for the small common | |
1338 | section. This approach is copied from ecoff.c. */ | |
1339 | static asection mips_elf_scom_section; | |
1340 | static asymbol mips_elf_scom_symbol; | |
1341 | static asymbol *mips_elf_scom_symbol_ptr; | |
1342 | ||
1343 | /* MIPS ELF also uses an acommon section, which represents an | |
1344 | allocated common symbol which may be overridden by a | |
1345 | definition in a shared library. */ | |
1346 | static asection mips_elf_acom_section; | |
1347 | static asymbol mips_elf_acom_symbol; | |
1348 | static asymbol *mips_elf_acom_symbol_ptr; | |
1349 | ||
1350 | /* Handle the special MIPS section numbers that a symbol may use. */ | |
1351 | ||
1352 | static void | |
1353 | mips_elf_symbol_processing (abfd, asym) | |
1354 | bfd *abfd; | |
1355 | asymbol *asym; | |
1356 | { | |
1357 | elf_symbol_type *elfsym; | |
1358 | ||
1359 | elfsym = (elf_symbol_type *) asym; | |
1360 | switch (elfsym->internal_elf_sym.st_shndx) | |
1361 | { | |
1362 | case SHN_MIPS_ACOMMON: | |
1363 | /* This section is used in a dynamically linked executable file. | |
1364 | It is an allocated common section. The dynamic linker can | |
1365 | either resolve these symbols to something in a shared | |
1366 | library, or it can just leave them here. For our purposes, | |
1367 | we can consider these symbols to be in a new section. */ | |
1368 | if (mips_elf_acom_section.name == NULL) | |
1369 | { | |
1370 | /* Initialize the acommon section. */ | |
1371 | mips_elf_acom_section.name = ".acommon"; | |
1372 | mips_elf_acom_section.flags = SEC_NO_FLAGS; | |
1373 | mips_elf_acom_section.output_section = &mips_elf_acom_section; | |
1374 | mips_elf_acom_section.symbol = &mips_elf_acom_symbol; | |
1375 | mips_elf_acom_section.symbol_ptr_ptr = &mips_elf_acom_symbol_ptr; | |
1376 | mips_elf_acom_symbol.name = ".acommon"; | |
1377 | mips_elf_acom_symbol.flags = BSF_SECTION_SYM; | |
1378 | mips_elf_acom_symbol.section = &mips_elf_acom_section; | |
1379 | mips_elf_acom_symbol_ptr = &mips_elf_acom_symbol; | |
1380 | } | |
1381 | asym->section = &mips_elf_acom_section; | |
1382 | break; | |
1383 | ||
1384 | case SHN_COMMON: | |
1385 | /* Common symbols less than the GP size are automatically | |
1386 | treated as SHN_MIPS_SCOMMON symbols. */ | |
1387 | if (asym->value > elf_gp_size (abfd)) | |
1388 | break; | |
1389 | /* Fall through. */ | |
1390 | case SHN_MIPS_SCOMMON: | |
1391 | if (mips_elf_scom_section.name == NULL) | |
1392 | { | |
1393 | /* Initialize the small common section. */ | |
1394 | mips_elf_scom_section.name = ".scommon"; | |
1395 | mips_elf_scom_section.flags = SEC_IS_COMMON; | |
1396 | mips_elf_scom_section.output_section = &mips_elf_scom_section; | |
1397 | mips_elf_scom_section.symbol = &mips_elf_scom_symbol; | |
1398 | mips_elf_scom_section.symbol_ptr_ptr = &mips_elf_scom_symbol_ptr; | |
1399 | mips_elf_scom_symbol.name = ".scommon"; | |
1400 | mips_elf_scom_symbol.flags = BSF_SECTION_SYM; | |
1401 | mips_elf_scom_symbol.section = &mips_elf_scom_section; | |
1402 | mips_elf_scom_symbol_ptr = &mips_elf_scom_symbol; | |
1403 | } | |
1404 | asym->section = &mips_elf_scom_section; | |
1405 | asym->value = elfsym->internal_elf_sym.st_size; | |
1406 | break; | |
1407 | ||
1408 | case SHN_MIPS_SUNDEFINED: | |
24f13b03 | 1409 | asym->section = bfd_und_section_ptr; |
aac6b32f ILT |
1410 | break; |
1411 | } | |
1412 | } | |
1413 | \f | |
6e07e54f ILT |
1414 | /* Read ECOFF debugging information from a .mdebug section into a |
1415 | ecoff_debug_info structure. */ | |
b3c0fc57 ILT |
1416 | |
1417 | static boolean | |
6e07e54f | 1418 | mips_elf_read_ecoff_info (abfd, section, debug) |
b3c0fc57 | 1419 | bfd *abfd; |
6e07e54f ILT |
1420 | asection *section; |
1421 | struct ecoff_debug_info *debug; | |
b3c0fc57 | 1422 | { |
6e07e54f ILT |
1423 | HDRR *symhdr; |
1424 | const struct ecoff_debug_swap *swap; | |
a3a33af3 | 1425 | char *ext_hdr = NULL; |
6e07e54f ILT |
1426 | |
1427 | swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; | |
1428 | ||
a3a33af3 ILT |
1429 | ext_hdr = (char *) malloc (swap->external_hdr_size); |
1430 | if (ext_hdr == NULL && swap->external_hdr_size != 0) | |
1431 | { | |
1432 | bfd_set_error (bfd_error_no_memory); | |
1433 | goto error_return; | |
1434 | } | |
6e07e54f ILT |
1435 | |
1436 | if (bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0, | |
1437 | swap->external_hdr_size) | |
1438 | == false) | |
a3a33af3 | 1439 | goto error_return; |
6e07e54f ILT |
1440 | |
1441 | symhdr = &debug->symbolic_header; | |
1442 | (*swap->swap_hdr_in) (abfd, ext_hdr, symhdr); | |
1443 | ||
1444 | /* The symbolic header contains absolute file offsets and sizes to | |
1445 | read. */ | |
1446 | #define READ(ptr, offset, count, size, type) \ | |
1447 | if (symhdr->count == 0) \ | |
1448 | debug->ptr = NULL; \ | |
1449 | else \ | |
1450 | { \ | |
1451 | debug->ptr = (type) malloc (size * symhdr->count); \ | |
1452 | if (debug->ptr == NULL) \ | |
1453 | { \ | |
a3a33af3 ILT |
1454 | bfd_set_error (bfd_error_no_memory); \ |
1455 | goto error_return; \ | |
6e07e54f ILT |
1456 | } \ |
1457 | if (bfd_seek (abfd, (file_ptr) symhdr->offset, SEEK_SET) != 0 \ | |
1458 | || (bfd_read (debug->ptr, size, symhdr->count, \ | |
1459 | abfd) != size * symhdr->count)) \ | |
a3a33af3 | 1460 | goto error_return; \ |
6e07e54f ILT |
1461 | } |
1462 | ||
1463 | READ (line, cbLineOffset, cbLine, sizeof (unsigned char), unsigned char *); | |
1464 | READ (external_dnr, cbDnOffset, idnMax, swap->external_dnr_size, PTR); | |
1465 | READ (external_pdr, cbPdOffset, ipdMax, swap->external_pdr_size, PTR); | |
1466 | READ (external_sym, cbSymOffset, isymMax, swap->external_sym_size, PTR); | |
1467 | READ (external_opt, cbOptOffset, ioptMax, swap->external_opt_size, PTR); | |
1468 | READ (external_aux, cbAuxOffset, iauxMax, sizeof (union aux_ext), | |
1469 | union aux_ext *); | |
1470 | READ (ss, cbSsOffset, issMax, sizeof (char), char *); | |
1471 | READ (ssext, cbSsExtOffset, issExtMax, sizeof (char), char *); | |
1472 | READ (external_fdr, cbFdOffset, ifdMax, swap->external_fdr_size, PTR); | |
1473 | READ (external_rfd, cbRfdOffset, crfd, swap->external_rfd_size, PTR); | |
aac6b32f ILT |
1474 | READ (external_ext, cbExtOffset, iextMax, swap->external_ext_size, PTR); |
1475 | #undef READ | |
9783e04a DM |
1476 | |
1477 | debug->fdr = NULL; | |
a3a33af3 | 1478 | debug->adjust = NULL; |
6e07e54f ILT |
1479 | |
1480 | return true; | |
a3a33af3 ILT |
1481 | |
1482 | error_return: | |
1483 | if (ext_hdr != NULL) | |
1484 | free (ext_hdr); | |
a3a33af3 ILT |
1485 | if (debug->line != NULL) |
1486 | free (debug->line); | |
1487 | if (debug->external_dnr != NULL) | |
1488 | free (debug->external_dnr); | |
1489 | if (debug->external_pdr != NULL) | |
1490 | free (debug->external_pdr); | |
1491 | if (debug->external_sym != NULL) | |
1492 | free (debug->external_sym); | |
1493 | if (debug->external_opt != NULL) | |
1494 | free (debug->external_opt); | |
1495 | if (debug->external_aux != NULL) | |
1496 | free (debug->external_aux); | |
1497 | if (debug->ss != NULL) | |
1498 | free (debug->ss); | |
1499 | if (debug->ssext != NULL) | |
1500 | free (debug->ssext); | |
1501 | if (debug->external_fdr != NULL) | |
1502 | free (debug->external_fdr); | |
1503 | if (debug->external_rfd != NULL) | |
1504 | free (debug->external_rfd); | |
aac6b32f ILT |
1505 | if (debug->external_ext != NULL) |
1506 | free (debug->external_ext); | |
a3a33af3 | 1507 | return false; |
6e07e54f | 1508 | } |
a16fcab3 KR |
1509 | \f |
1510 | /* MIPS ELF uses a special find_nearest_line routine in order the | |
1511 | handle the ECOFF debugging information. */ | |
1512 | ||
1513 | struct mips_elf_find_line | |
1514 | { | |
1515 | struct ecoff_debug_info d; | |
1516 | struct ecoff_find_line i; | |
1517 | }; | |
6e07e54f | 1518 | |
a16fcab3 KR |
1519 | static boolean |
1520 | mips_elf_find_nearest_line (abfd, section, symbols, offset, filename_ptr, | |
1521 | functionname_ptr, line_ptr) | |
1522 | bfd *abfd; | |
1523 | asection *section; | |
1524 | asymbol **symbols; | |
1525 | bfd_vma offset; | |
1526 | const char **filename_ptr; | |
1527 | const char **functionname_ptr; | |
1528 | unsigned int *line_ptr; | |
1529 | { | |
1530 | asection *msec; | |
1531 | ||
1532 | msec = bfd_get_section_by_name (abfd, ".mdebug"); | |
1533 | if (msec != NULL) | |
1534 | { | |
1535 | struct mips_elf_find_line *fi; | |
1536 | const struct ecoff_debug_swap * const swap = | |
1537 | get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; | |
1538 | ||
1539 | fi = elf_tdata (abfd)->find_line_info; | |
1540 | if (fi == NULL) | |
1541 | { | |
1542 | bfd_size_type external_fdr_size; | |
1543 | char *fraw_src; | |
1544 | char *fraw_end; | |
1545 | struct fdr *fdr_ptr; | |
1546 | ||
1547 | fi = ((struct mips_elf_find_line *) | |
1548 | bfd_alloc (abfd, sizeof (struct mips_elf_find_line))); | |
1549 | if (fi == NULL) | |
1550 | { | |
1551 | bfd_set_error (bfd_error_no_memory); | |
1552 | return false; | |
1553 | } | |
1554 | ||
1555 | memset (fi, 0, sizeof (struct mips_elf_find_line)); | |
1556 | ||
1557 | if (! mips_elf_read_ecoff_info (abfd, msec, &fi->d)) | |
1558 | return false; | |
1559 | ||
1560 | /* Swap in the FDR information. */ | |
1561 | fi->d.fdr = ((struct fdr *) | |
1562 | bfd_alloc (abfd, | |
1563 | (fi->d.symbolic_header.ifdMax * | |
1564 | sizeof (struct fdr)))); | |
1565 | if (fi->d.fdr == NULL) | |
1566 | { | |
1567 | bfd_set_error (bfd_error_no_memory); | |
1568 | return false; | |
1569 | } | |
1570 | external_fdr_size = swap->external_fdr_size; | |
1571 | fdr_ptr = fi->d.fdr; | |
1572 | fraw_src = (char *) fi->d.external_fdr; | |
1573 | fraw_end = (fraw_src | |
1574 | + fi->d.symbolic_header.ifdMax * external_fdr_size); | |
1575 | for (; fraw_src < fraw_end; fraw_src += external_fdr_size, fdr_ptr++) | |
1576 | (*swap->swap_fdr_in) (abfd, (PTR) fraw_src, fdr_ptr); | |
1577 | ||
1578 | elf_tdata (abfd)->find_line_info = fi; | |
1579 | ||
1580 | /* Note that we don't bother to ever free this information. | |
1581 | find_nearest_line is either called all the time, as in | |
1582 | objdump -l, so the information should be saved, or it is | |
1583 | rarely called, as in ld error messages, so the memory | |
1584 | wasted is unimportant. Still, it would probably be a | |
1585 | good idea for free_cached_info to throw it away. */ | |
1586 | } | |
1587 | ||
1588 | if (_bfd_ecoff_locate_line (abfd, section, offset, &fi->d, swap, | |
1589 | &fi->i, filename_ptr, functionname_ptr, | |
1590 | line_ptr)) | |
1591 | return true; | |
1592 | } | |
1593 | ||
1594 | /* Fall back on the generic ELF find_nearest_line routine. */ | |
1595 | ||
1596 | return bfd_elf32_find_nearest_line (abfd, section, symbols, offset, | |
1597 | filename_ptr, functionname_ptr, | |
1598 | line_ptr); | |
1599 | } | |
1600 | \f | |
aac6b32f ILT |
1601 | /* The MIPS ELF linker needs additional information for each symbol in |
1602 | the global hash table. */ | |
1603 | ||
1604 | struct mips_elf_link_hash_entry | |
1605 | { | |
1606 | struct elf_link_hash_entry root; | |
6e07e54f | 1607 | |
aac6b32f ILT |
1608 | /* External symbol information. */ |
1609 | EXTR esym; | |
1610 | }; | |
1611 | ||
1612 | /* MIPS ELF linker hash table. */ | |
1613 | ||
1614 | struct mips_elf_link_hash_table | |
1615 | { | |
1616 | struct elf_link_hash_table root; | |
1617 | }; | |
1618 | ||
1619 | /* Look up an entry in a MIPS ELF linker hash table. */ | |
1620 | ||
1621 | #define mips_elf_link_hash_lookup(table, string, create, copy, follow) \ | |
1622 | ((struct mips_elf_link_hash_entry *) \ | |
1623 | elf_link_hash_lookup (&(table)->root, (string), (create), \ | |
1624 | (copy), (follow))) | |
1625 | ||
1626 | /* Traverse a MIPS ELF linker hash table. */ | |
1627 | ||
1628 | #define mips_elf_link_hash_traverse(table, func, info) \ | |
1629 | (elf_link_hash_traverse \ | |
1630 | (&(table)->root, \ | |
1631 | (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \ | |
1632 | (info))) | |
1633 | ||
1634 | /* Get the MIPS ELF linker hash table from a link_info structure. */ | |
1635 | ||
1636 | #define mips_elf_hash_table(p) \ | |
1637 | ((struct mips_elf_link_hash_table *) ((p)->hash)) | |
1638 | ||
1639 | static boolean mips_elf_output_extsym | |
1640 | PARAMS ((struct mips_elf_link_hash_entry *, PTR)); | |
1641 | ||
1642 | /* Create an entry in a MIPS ELF linker hash table. */ | |
1643 | ||
1644 | static struct bfd_hash_entry * | |
1645 | mips_elf_link_hash_newfunc (entry, table, string) | |
1646 | struct bfd_hash_entry *entry; | |
1647 | struct bfd_hash_table *table; | |
1648 | const char *string; | |
1649 | { | |
1650 | struct mips_elf_link_hash_entry *ret = | |
1651 | (struct mips_elf_link_hash_entry *) entry; | |
1652 | ||
1653 | /* Allocate the structure if it has not already been allocated by a | |
1654 | subclass. */ | |
1655 | if (ret == (struct mips_elf_link_hash_entry *) NULL) | |
1656 | ret = ((struct mips_elf_link_hash_entry *) | |
1657 | bfd_hash_allocate (table, | |
1658 | sizeof (struct mips_elf_link_hash_entry))); | |
1659 | if (ret == (struct mips_elf_link_hash_entry *) NULL) | |
1660 | { | |
1661 | bfd_set_error (bfd_error_no_memory); | |
1662 | return (struct bfd_hash_entry *) ret; | |
1663 | } | |
1664 | ||
1665 | /* Call the allocation method of the superclass. */ | |
1666 | ret = ((struct mips_elf_link_hash_entry *) | |
1667 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, | |
1668 | table, string)); | |
1669 | if (ret != (struct mips_elf_link_hash_entry *) NULL) | |
1670 | { | |
1671 | /* Set local fields. */ | |
1672 | memset (&ret->esym, 0, sizeof (EXTR)); | |
1673 | /* We use -2 as a marker to indicate that the information has | |
1674 | not been set. -1 means there is no associated ifd. */ | |
1675 | ret->esym.ifd = -2; | |
1676 | } | |
1677 | ||
1678 | return (struct bfd_hash_entry *) ret; | |
1679 | } | |
1680 | ||
1681 | /* Create a MIPS ELF linker hash table. */ | |
1682 | ||
1683 | static struct bfd_link_hash_table * | |
1684 | mips_elf_link_hash_table_create (abfd) | |
1685 | bfd *abfd; | |
1686 | { | |
1687 | struct mips_elf_link_hash_table *ret; | |
1688 | ||
1689 | ret = ((struct mips_elf_link_hash_table *) | |
1690 | bfd_alloc (abfd, sizeof (struct mips_elf_link_hash_table))); | |
1691 | if (ret == (struct mips_elf_link_hash_table *) NULL) | |
1692 | { | |
1693 | bfd_set_error (bfd_error_no_memory); | |
1694 | return NULL; | |
1695 | } | |
1696 | ||
1697 | if (! _bfd_elf_link_hash_table_init (&ret->root, abfd, | |
1698 | mips_elf_link_hash_newfunc)) | |
1699 | { | |
1700 | bfd_release (abfd, ret); | |
1701 | return NULL; | |
1702 | } | |
1703 | ||
1704 | return &ret->root.root; | |
1705 | } | |
1706 | ||
1707 | /* Hook called by the linker routine which adds symbols from an object | |
1708 | file. We must handle the special MIPS section numbers here. */ | |
1709 | ||
1710 | /*ARGSUSED*/ | |
6e07e54f | 1711 | static boolean |
aac6b32f ILT |
1712 | mips_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp) |
1713 | bfd *abfd; | |
1714 | struct bfd_link_info *info; | |
1715 | const Elf_Internal_Sym *sym; | |
1716 | const char **namep; | |
1717 | flagword *flagsp; | |
1718 | asection **secp; | |
1719 | bfd_vma *valp; | |
1720 | { | |
1721 | switch (sym->st_shndx) | |
1722 | { | |
1723 | case SHN_COMMON: | |
1724 | /* Common symbols less than the GP size are automatically | |
1725 | treated as SHN_MIPS_SCOMMON symbols. */ | |
1726 | if (sym->st_size > elf_gp_size (abfd)) | |
1727 | break; | |
1728 | /* Fall through. */ | |
1729 | case SHN_MIPS_SCOMMON: | |
1730 | *secp = bfd_make_section_old_way (abfd, ".scommon"); | |
1731 | (*secp)->flags |= SEC_IS_COMMON; | |
1732 | *valp = sym->st_size; | |
1733 | break; | |
1734 | ||
1735 | case SHN_MIPS_SUNDEFINED: | |
24f13b03 | 1736 | *secp = bfd_und_section_ptr; |
aac6b32f ILT |
1737 | break; |
1738 | } | |
1739 | ||
1740 | return true; | |
1741 | } | |
1742 | ||
1743 | /* Structure used to pass information to mips_elf_output_extsym. */ | |
1744 | ||
1745 | struct extsym_info | |
6e07e54f | 1746 | { |
aac6b32f ILT |
1747 | bfd *abfd; |
1748 | struct bfd_link_info *info; | |
1749 | struct ecoff_debug_info *debug; | |
9783e04a | 1750 | const struct ecoff_debug_swap *swap; |
aac6b32f ILT |
1751 | boolean failed; |
1752 | }; | |
9783e04a | 1753 | |
aac6b32f ILT |
1754 | /* This routine is used to write out ECOFF debugging external symbol |
1755 | information. It is called via mips_elf_link_hash_traverse. The | |
1756 | ECOFF external symbol information must match the ELF external | |
1757 | symbol information. Unfortunately, at this point we don't know | |
1758 | whether a symbol is required by reloc information, so the two | |
1759 | tables may wind up being different. We must sort out the external | |
1760 | symbol information before we can set the final size of the .mdebug | |
1761 | section, and we must set the size of the .mdebug section before we | |
1762 | can relocate any sections, and we can't know which symbols are | |
1763 | required by relocation until we relocate the sections. | |
1764 | Fortunately, it is relatively unlikely that any symbol will be | |
1765 | stripped but required by a reloc. In particular, it can not happen | |
1766 | when generating a final executable. */ | |
1767 | ||
1768 | static boolean | |
1769 | mips_elf_output_extsym (h, data) | |
1770 | struct mips_elf_link_hash_entry *h; | |
1771 | PTR data; | |
1772 | { | |
1773 | struct extsym_info *einfo = (struct extsym_info *) data; | |
1774 | boolean strip; | |
1775 | ||
1776 | if (h->root.indx == -2) | |
1777 | strip = false; | |
1778 | else if (((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
1779 | || (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0) | |
1780 | && (h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 | |
1781 | && (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) | |
1782 | strip = true; | |
1783 | else if (einfo->info->strip == strip_all | |
1784 | || (einfo->info->strip == strip_some | |
1785 | && bfd_hash_lookup (einfo->info->keep_hash, | |
1786 | h->root.root.root.string, | |
1787 | false, false) == NULL)) | |
1788 | strip = true; | |
1789 | else | |
1790 | strip = false; | |
1791 | ||
1792 | if (strip) | |
1793 | return true; | |
6e07e54f | 1794 | |
aac6b32f | 1795 | if (h->esym.ifd == -2) |
6e07e54f | 1796 | { |
aac6b32f ILT |
1797 | h->esym.jmptbl = 0; |
1798 | h->esym.cobol_main = 0; | |
1799 | h->esym.weakext = 0; | |
1800 | h->esym.reserved = 0; | |
1801 | h->esym.ifd = ifdNil; | |
1802 | h->esym.asym.value = 0; | |
1803 | h->esym.asym.st = stGlobal; | |
1804 | ||
a16fcab3 KR |
1805 | if (h->root.root.type != bfd_link_hash_defined |
1806 | && h->root.root.type != bfd_link_hash_defweak) | |
aac6b32f ILT |
1807 | h->esym.asym.sc = scAbs; |
1808 | else | |
1809 | { | |
1810 | asection *output_section; | |
1811 | const char *name; | |
1812 | ||
1813 | output_section = h->root.root.u.def.section->output_section; | |
1814 | name = bfd_section_name (output_section->owner, output_section); | |
1815 | ||
1816 | if (strcmp (name, ".text") == 0) | |
1817 | h->esym.asym.sc = scText; | |
1818 | else if (strcmp (name, ".data") == 0) | |
1819 | h->esym.asym.sc = scData; | |
1820 | else if (strcmp (name, ".sdata") == 0) | |
1821 | h->esym.asym.sc = scSData; | |
1822 | else if (strcmp (name, ".rodata") == 0 | |
1823 | || strcmp (name, ".rdata") == 0) | |
1824 | h->esym.asym.sc = scRData; | |
1825 | else if (strcmp (name, ".bss") == 0) | |
1826 | h->esym.asym.sc = scBss; | |
1827 | else if (strcmp (name, ".sbss") == 0) | |
1828 | h->esym.asym.sc = scSBss; | |
1829 | else if (strcmp (name, ".init") == 0) | |
1830 | h->esym.asym.sc = scInit; | |
1831 | else if (strcmp (name, ".fini") == 0) | |
1832 | h->esym.asym.sc = scFini; | |
1833 | else | |
1834 | h->esym.asym.sc = scAbs; | |
1835 | } | |
1836 | ||
1837 | h->esym.asym.reserved = 0; | |
1838 | h->esym.asym.index = indexNil; | |
6e07e54f ILT |
1839 | } |
1840 | ||
16fe8950 ILT |
1841 | if (h->root.root.type == bfd_link_hash_common) |
1842 | h->esym.asym.value = h->root.root.u.c.size; | |
a16fcab3 KR |
1843 | else if (h->root.root.type == bfd_link_hash_defined |
1844 | || h->root.root.type == bfd_link_hash_defweak) | |
16fe8950 ILT |
1845 | { |
1846 | asection *sec; | |
1847 | ||
1848 | if (h->esym.asym.sc == scCommon) | |
1849 | h->esym.asym.sc = scBss; | |
1850 | else if (h->esym.asym.sc == scSCommon) | |
1851 | h->esym.asym.sc = scSBss; | |
1852 | ||
1853 | sec = h->root.root.u.def.section; | |
1854 | h->esym.asym.value = (h->root.root.u.def.value | |
1855 | + sec->output_offset | |
1856 | + sec->output_section->vma); | |
1857 | } | |
aac6b32f ILT |
1858 | |
1859 | if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap, | |
1860 | h->root.root.root.string, | |
1861 | &h->esym)) | |
1862 | { | |
1863 | einfo->failed = true; | |
1864 | return false; | |
1865 | } | |
6e07e54f ILT |
1866 | |
1867 | return true; | |
1868 | } | |
1869 | ||
aac6b32f | 1870 | /* A comparison routine used to sort .gptab entries. */ |
6e07e54f | 1871 | |
aac6b32f ILT |
1872 | static int |
1873 | gptab_compare (p1, p2) | |
1874 | const PTR p1; | |
1875 | const PTR p2; | |
6e07e54f | 1876 | { |
aac6b32f ILT |
1877 | const Elf32_gptab *a1 = (const Elf32_gptab *) p1; |
1878 | const Elf32_gptab *a2 = (const Elf32_gptab *) p2; | |
1879 | ||
1880 | return a1->gt_entry.gt_g_value - a2->gt_entry.gt_g_value; | |
6e07e54f ILT |
1881 | } |
1882 | ||
1883 | /* We need to use a special link routine to handle the .reginfo and | |
1884 | the .mdebug sections. We need to merge all instances of these | |
1885 | sections together, not write them all out sequentially. */ | |
1886 | ||
1887 | static boolean | |
1888 | mips_elf_final_link (abfd, info) | |
1889 | bfd *abfd; | |
1890 | struct bfd_link_info *info; | |
1891 | { | |
6e07e54f ILT |
1892 | asection **secpp; |
1893 | asection *o; | |
1894 | struct bfd_link_order *p; | |
aac6b32f | 1895 | asection *reginfo_sec, *mdebug_sec, *gptab_data_sec, *gptab_bss_sec; |
b3c0fc57 | 1896 | Elf32_RegInfo reginfo; |
6e07e54f ILT |
1897 | struct ecoff_debug_info debug; |
1898 | const struct ecoff_debug_swap *swap | |
1899 | = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; | |
1900 | HDRR *symhdr = &debug.symbolic_header; | |
9783e04a | 1901 | PTR mdebug_handle = NULL; |
6e07e54f | 1902 | |
497c5434 | 1903 | /* Drop the .options section, since it has special semantics which I |
aac6b32f ILT |
1904 | haven't bothered to figure out. */ |
1905 | for (secpp = &abfd->sections; *secpp != NULL; secpp = &(*secpp)->next) | |
6e07e54f | 1906 | { |
aac6b32f | 1907 | if (strcmp ((*secpp)->name, ".options") == 0) |
6e07e54f | 1908 | { |
aac6b32f ILT |
1909 | for (p = (*secpp)->link_order_head; p != NULL; p = p->next) |
1910 | if (p->type == bfd_indirect_link_order) | |
1911 | p->u.indirect.section->flags &=~ SEC_HAS_CONTENTS; | |
1912 | (*secpp)->link_order_head = NULL; | |
6e07e54f ILT |
1913 | *secpp = (*secpp)->next; |
1914 | --abfd->section_count; | |
aac6b32f | 1915 | break; |
6e07e54f | 1916 | } |
6e07e54f | 1917 | } |
b3c0fc57 | 1918 | |
6e07e54f | 1919 | /* Go through the sections and collect the .reginfo and .mdebug |
aac6b32f | 1920 | information. */ |
9783e04a DM |
1921 | reginfo_sec = NULL; |
1922 | mdebug_sec = NULL; | |
aac6b32f ILT |
1923 | gptab_data_sec = NULL; |
1924 | gptab_bss_sec = NULL; | |
6e07e54f | 1925 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) |
b3c0fc57 | 1926 | { |
6e07e54f | 1927 | if (strcmp (o->name, ".reginfo") == 0) |
b3c0fc57 | 1928 | { |
6e07e54f | 1929 | memset (®info, 0, sizeof reginfo); |
b3c0fc57 ILT |
1930 | |
1931 | /* We have found the .reginfo section in the output file. | |
6e07e54f ILT |
1932 | Look through all the link_orders comprising it and merge |
1933 | the information together. */ | |
1934 | for (p = o->link_order_head; | |
1935 | p != (struct bfd_link_order *) NULL; | |
b3c0fc57 ILT |
1936 | p = p->next) |
1937 | { | |
6e07e54f ILT |
1938 | asection *input_section; |
1939 | bfd *input_bfd; | |
1940 | Elf32_External_RegInfo ext; | |
1941 | Elf32_RegInfo sub; | |
1942 | ||
1943 | if (p->type != bfd_indirect_link_order) | |
aac6b32f ILT |
1944 | { |
1945 | if (p->type == bfd_fill_link_order) | |
1946 | continue; | |
1947 | abort (); | |
1948 | } | |
6e07e54f ILT |
1949 | |
1950 | input_section = p->u.indirect.section; | |
1951 | input_bfd = input_section->owner; | |
a16fcab3 KR |
1952 | |
1953 | /* The linker emulation code has probably clobbered the | |
1954 | size to be zero bytes. */ | |
1955 | if (input_section->_raw_size == 0) | |
1956 | input_section->_raw_size = sizeof (Elf32_External_RegInfo); | |
1957 | ||
6e07e54f ILT |
1958 | if (! bfd_get_section_contents (input_bfd, input_section, |
1959 | (PTR) &ext, | |
1960 | (file_ptr) 0, | |
1961 | sizeof ext)) | |
1962 | return false; | |
1963 | ||
1964 | bfd_mips_elf32_swap_reginfo_in (input_bfd, &ext, &sub); | |
1965 | ||
1966 | reginfo.ri_gprmask |= sub.ri_gprmask; | |
1967 | reginfo.ri_cprmask[0] |= sub.ri_cprmask[0]; | |
1968 | reginfo.ri_cprmask[1] |= sub.ri_cprmask[1]; | |
1969 | reginfo.ri_cprmask[2] |= sub.ri_cprmask[2]; | |
1970 | reginfo.ri_cprmask[3] |= sub.ri_cprmask[3]; | |
1971 | ||
1972 | /* ri_gp_value is set by the function | |
1973 | mips_elf_section_processing when the section is | |
1974 | finally written out. */ | |
aac6b32f ILT |
1975 | |
1976 | /* Hack: reset the SEC_HAS_CONTENTS flag so that | |
1977 | elf_link_input_bfd ignores this section. */ | |
1978 | input_section->flags &=~ SEC_HAS_CONTENTS; | |
6e07e54f ILT |
1979 | } |
1980 | ||
1981 | /* Force the section size to the value we want. */ | |
1982 | o->_raw_size = sizeof (Elf32_External_RegInfo); | |
1983 | ||
aac6b32f ILT |
1984 | /* Skip this section later on (I don't think this currently |
1985 | matters, but someday it might). */ | |
6e07e54f ILT |
1986 | o->link_order_head = (struct bfd_link_order *) NULL; |
1987 | ||
1988 | reginfo_sec = o; | |
1989 | } | |
1990 | ||
1991 | if (strcmp (o->name, ".mdebug") == 0) | |
1992 | { | |
aac6b32f ILT |
1993 | struct extsym_info einfo; |
1994 | ||
6e07e54f ILT |
1995 | /* We have found the .mdebug section in the output file. |
1996 | Look through all the link_orders comprising it and merge | |
1997 | the information together. */ | |
1998 | symhdr->magic = swap->sym_magic; | |
1999 | /* FIXME: What should the version stamp be? */ | |
2000 | symhdr->vstamp = 0; | |
2001 | symhdr->ilineMax = 0; | |
2002 | symhdr->cbLine = 0; | |
2003 | symhdr->idnMax = 0; | |
2004 | symhdr->ipdMax = 0; | |
2005 | symhdr->isymMax = 0; | |
2006 | symhdr->ioptMax = 0; | |
2007 | symhdr->iauxMax = 0; | |
2008 | symhdr->issMax = 0; | |
2009 | symhdr->issExtMax = 0; | |
2010 | symhdr->ifdMax = 0; | |
2011 | symhdr->crfd = 0; | |
2012 | symhdr->iextMax = 0; | |
2013 | ||
2014 | /* We accumulate the debugging information itself in the | |
2015 | debug_info structure. */ | |
9783e04a DM |
2016 | debug.line = NULL; |
2017 | debug.external_dnr = NULL; | |
2018 | debug.external_pdr = NULL; | |
2019 | debug.external_sym = NULL; | |
2020 | debug.external_opt = NULL; | |
2021 | debug.external_aux = NULL; | |
2022 | debug.ss = NULL; | |
6e07e54f | 2023 | debug.ssext = debug.ssext_end = NULL; |
9783e04a DM |
2024 | debug.external_fdr = NULL; |
2025 | debug.external_rfd = NULL; | |
6e07e54f ILT |
2026 | debug.external_ext = debug.external_ext_end = NULL; |
2027 | ||
9783e04a DM |
2028 | mdebug_handle = bfd_ecoff_debug_init (abfd, &debug, swap, info); |
2029 | if (mdebug_handle == (PTR) NULL) | |
2030 | return false; | |
2031 | ||
6e07e54f ILT |
2032 | for (p = o->link_order_head; |
2033 | p != (struct bfd_link_order *) NULL; | |
2034 | p = p->next) | |
2035 | { | |
2036 | asection *input_section; | |
2037 | bfd *input_bfd; | |
2038 | const struct ecoff_debug_swap *input_swap; | |
2039 | struct ecoff_debug_info input_debug; | |
aac6b32f ILT |
2040 | char *eraw_src; |
2041 | char *eraw_end; | |
6e07e54f ILT |
2042 | |
2043 | if (p->type != bfd_indirect_link_order) | |
aac6b32f ILT |
2044 | { |
2045 | if (p->type == bfd_fill_link_order) | |
2046 | continue; | |
2047 | abort (); | |
2048 | } | |
6e07e54f ILT |
2049 | |
2050 | input_section = p->u.indirect.section; | |
2051 | input_bfd = input_section->owner; | |
2052 | ||
2053 | if (bfd_get_flavour (input_bfd) != bfd_target_elf_flavour | |
2054 | || (get_elf_backend_data (input_bfd) | |
2055 | ->elf_backend_ecoff_debug_swap) == NULL) | |
b3c0fc57 | 2056 | { |
6e07e54f ILT |
2057 | /* I don't know what a non MIPS ELF bfd would be |
2058 | doing with a .mdebug section, but I don't really | |
2059 | want to deal with it. */ | |
2060 | continue; | |
b3c0fc57 | 2061 | } |
6e07e54f ILT |
2062 | |
2063 | input_swap = (get_elf_backend_data (input_bfd) | |
2064 | ->elf_backend_ecoff_debug_swap); | |
2065 | ||
2066 | BFD_ASSERT (p->size == input_section->_raw_size); | |
2067 | ||
2068 | /* The ECOFF linking code expects that we have already | |
2069 | read in the debugging information and set up an | |
2070 | ecoff_debug_info structure, so we do that now. */ | |
2071 | if (! mips_elf_read_ecoff_info (input_bfd, input_section, | |
2072 | &input_debug)) | |
2073 | return false; | |
2074 | ||
2075 | if (! (bfd_ecoff_debug_accumulate | |
9783e04a DM |
2076 | (mdebug_handle, abfd, &debug, swap, input_bfd, |
2077 | &input_debug, input_swap, info))) | |
6e07e54f ILT |
2078 | return false; |
2079 | ||
2080 | /* Loop through the external symbols. For each one with | |
aac6b32f ILT |
2081 | interesting information, try to find the symbol in |
2082 | the linker global hash table and save the information | |
2083 | for the output external symbols. */ | |
2084 | eraw_src = input_debug.external_ext; | |
2085 | eraw_end = (eraw_src | |
2086 | + (input_debug.symbolic_header.iextMax | |
2087 | * input_swap->external_ext_size)); | |
2088 | for (; | |
2089 | eraw_src < eraw_end; | |
2090 | eraw_src += input_swap->external_ext_size) | |
6e07e54f | 2091 | { |
aac6b32f ILT |
2092 | EXTR ext; |
2093 | const char *name; | |
2094 | struct mips_elf_link_hash_entry *h; | |
2095 | ||
2096 | (*input_swap->swap_ext_in) (input_bfd, (PTR) eraw_src, &ext); | |
2097 | if (ext.asym.sc == scNil | |
2098 | || ext.asym.sc == scUndefined | |
2099 | || ext.asym.sc == scSUndefined) | |
2100 | continue; | |
2101 | ||
2102 | name = input_debug.ssext + ext.asym.iss; | |
2103 | h = mips_elf_link_hash_lookup (mips_elf_hash_table (info), | |
2104 | name, false, false, true); | |
2105 | if (h == NULL || h->esym.ifd != -2) | |
2106 | continue; | |
2107 | ||
2108 | if (ext.ifd != -1) | |
6e07e54f | 2109 | { |
aac6b32f ILT |
2110 | BFD_ASSERT (ext.ifd |
2111 | < input_debug.symbolic_header.ifdMax); | |
2112 | ext.ifd = input_debug.ifdmap[ext.ifd]; | |
6e07e54f | 2113 | } |
aac6b32f ILT |
2114 | |
2115 | h->esym = ext; | |
6e07e54f ILT |
2116 | } |
2117 | ||
aac6b32f | 2118 | /* Free up the information we just read. */ |
6e07e54f ILT |
2119 | free (input_debug.line); |
2120 | free (input_debug.external_dnr); | |
2121 | free (input_debug.external_pdr); | |
2122 | free (input_debug.external_sym); | |
2123 | free (input_debug.external_opt); | |
2124 | free (input_debug.external_aux); | |
2125 | free (input_debug.ss); | |
2126 | free (input_debug.ssext); | |
2127 | free (input_debug.external_fdr); | |
2128 | free (input_debug.external_rfd); | |
aac6b32f ILT |
2129 | free (input_debug.external_ext); |
2130 | ||
2131 | /* Hack: reset the SEC_HAS_CONTENTS flag so that | |
2132 | elf_link_input_bfd ignores this section. */ | |
2133 | input_section->flags &=~ SEC_HAS_CONTENTS; | |
b3c0fc57 ILT |
2134 | } |
2135 | ||
6e07e54f | 2136 | /* Build the external symbol information. */ |
aac6b32f ILT |
2137 | einfo.abfd = abfd; |
2138 | einfo.info = info; | |
2139 | einfo.debug = &debug; | |
2140 | einfo.swap = swap; | |
2141 | einfo.failed = false; | |
2142 | mips_elf_link_hash_traverse (mips_elf_hash_table (info), | |
2143 | mips_elf_output_extsym, | |
2144 | (PTR) &einfo); | |
2145 | if (einfo.failed) | |
b3c0fc57 ILT |
2146 | return false; |
2147 | ||
aac6b32f | 2148 | /* Set the size of the .mdebug section. */ |
6e07e54f ILT |
2149 | o->_raw_size = bfd_ecoff_debug_size (abfd, &debug, swap); |
2150 | ||
aac6b32f ILT |
2151 | /* Skip this section later on (I don't think this currently |
2152 | matters, but someday it might). */ | |
6e07e54f ILT |
2153 | o->link_order_head = (struct bfd_link_order *) NULL; |
2154 | ||
2155 | mdebug_sec = o; | |
2156 | } | |
6e07e54f | 2157 | |
aac6b32f | 2158 | if (strncmp (o->name, ".gptab.", sizeof ".gptab." - 1) == 0) |
6e07e54f | 2159 | { |
aac6b32f ILT |
2160 | const char *subname; |
2161 | unsigned int c; | |
2162 | Elf32_gptab *tab; | |
2163 | Elf32_External_gptab *ext_tab; | |
2164 | unsigned int i; | |
2165 | ||
2166 | /* The .gptab.sdata and .gptab.sbss sections hold | |
2167 | information describing how the small data area would | |
2168 | change depending upon the -G switch. These sections | |
2169 | not used in executables files. */ | |
2170 | if (! info->relocateable) | |
2171 | { | |
2172 | asection **secpp; | |
2173 | ||
2174 | for (p = o->link_order_head; | |
2175 | p != (struct bfd_link_order *) NULL; | |
2176 | p = p->next) | |
2177 | { | |
2178 | asection *input_section; | |
2179 | ||
2180 | if (p->type != bfd_indirect_link_order) | |
2181 | { | |
2182 | if (p->type == bfd_fill_link_order) | |
2183 | continue; | |
2184 | abort (); | |
2185 | } | |
2186 | ||
2187 | input_section = p->u.indirect.section; | |
2188 | ||
2189 | /* Hack: reset the SEC_HAS_CONTENTS flag so that | |
2190 | elf_link_input_bfd ignores this section. */ | |
2191 | input_section->flags &=~ SEC_HAS_CONTENTS; | |
2192 | } | |
2193 | ||
2194 | /* Skip this section later on (I don't think this | |
2195 | currently matters, but someday it might). */ | |
2196 | o->link_order_head = (struct bfd_link_order *) NULL; | |
2197 | ||
2198 | /* Really remove the section. */ | |
2199 | for (secpp = &abfd->sections; | |
2200 | *secpp != o; | |
2201 | secpp = &(*secpp)->next) | |
2202 | ; | |
2203 | *secpp = (*secpp)->next; | |
2204 | --abfd->section_count; | |
2205 | ||
2206 | continue; | |
2207 | } | |
2208 | ||
2209 | /* There is one gptab for initialized data, and one for | |
2210 | uninitialized data. */ | |
2211 | if (strcmp (o->name, ".gptab.sdata") == 0) | |
2212 | gptab_data_sec = o; | |
2213 | else if (strcmp (o->name, ".gptab.sbss") == 0) | |
2214 | gptab_bss_sec = o; | |
2215 | else | |
2216 | { | |
2217 | bfd_set_error (bfd_error_nonrepresentable_section); | |
2218 | return false; | |
2219 | } | |
2220 | ||
2221 | /* The linker script always combines .gptab.data and | |
2222 | .gptab.sdata into .gptab.sdata, and likewise for | |
2223 | .gptab.bss and .gptab.sbss. It is possible that there is | |
2224 | no .sdata or .sbss section in the output file, in which | |
2225 | case we must change the name of the output section. */ | |
2226 | subname = o->name + sizeof ".gptab" - 1; | |
2227 | if (bfd_get_section_by_name (abfd, subname) == NULL) | |
2228 | { | |
2229 | if (o == gptab_data_sec) | |
2230 | o->name = ".gptab.data"; | |
2231 | else | |
2232 | o->name = ".gptab.bss"; | |
2233 | subname = o->name + sizeof ".gptab" - 1; | |
2234 | BFD_ASSERT (bfd_get_section_by_name (abfd, subname) != NULL); | |
2235 | } | |
2236 | ||
2237 | /* Set up the first entry. */ | |
2238 | c = 1; | |
2239 | tab = (Elf32_gptab *) malloc (c * sizeof (Elf32_gptab)); | |
2240 | if (tab == NULL) | |
2241 | { | |
2242 | bfd_set_error (bfd_error_no_memory); | |
2243 | return false; | |
2244 | } | |
2245 | tab[0].gt_header.gt_current_g_value = elf_gp_size (abfd); | |
2246 | tab[0].gt_header.gt_unused = 0; | |
2247 | ||
2248 | /* Combine the input sections. */ | |
6e07e54f ILT |
2249 | for (p = o->link_order_head; |
2250 | p != (struct bfd_link_order *) NULL; | |
2251 | p = p->next) | |
2252 | { | |
aac6b32f ILT |
2253 | asection *input_section; |
2254 | bfd *input_bfd; | |
2255 | bfd_size_type size; | |
2256 | unsigned long last; | |
2257 | bfd_size_type gpentry; | |
2258 | ||
2259 | if (p->type != bfd_indirect_link_order) | |
6e07e54f | 2260 | { |
aac6b32f ILT |
2261 | if (p->type == bfd_fill_link_order) |
2262 | continue; | |
2263 | abort (); | |
2264 | } | |
6e07e54f | 2265 | |
aac6b32f ILT |
2266 | input_section = p->u.indirect.section; |
2267 | input_bfd = input_section->owner; | |
2268 | ||
2269 | /* Combine the gptab entries for this input section one | |
2270 | by one. We know that the input gptab entries are | |
2271 | sorted by ascending -G value. */ | |
2272 | size = bfd_section_size (input_bfd, input_section); | |
2273 | last = 0; | |
2274 | for (gpentry = sizeof (Elf32_External_gptab); | |
2275 | gpentry < size; | |
2276 | gpentry += sizeof (Elf32_External_gptab)) | |
2277 | { | |
2278 | Elf32_External_gptab ext_gptab; | |
2279 | Elf32_gptab int_gptab; | |
2280 | unsigned long val; | |
2281 | unsigned long add; | |
2282 | boolean exact; | |
2283 | unsigned int look; | |
2284 | ||
2285 | if (! (bfd_get_section_contents | |
2286 | (input_bfd, input_section, (PTR) &ext_gptab, | |
2287 | gpentry, sizeof (Elf32_External_gptab)))) | |
9783e04a | 2288 | { |
aac6b32f | 2289 | free (tab); |
9783e04a DM |
2290 | return false; |
2291 | } | |
aac6b32f ILT |
2292 | |
2293 | bfd_mips_elf32_swap_gptab_in (input_bfd, &ext_gptab, | |
2294 | &int_gptab); | |
2295 | val = int_gptab.gt_entry.gt_g_value; | |
2296 | add = int_gptab.gt_entry.gt_bytes - last; | |
2297 | ||
2298 | exact = false; | |
2299 | for (look = 1; look < c; look++) | |
2300 | { | |
2301 | if (tab[look].gt_entry.gt_g_value >= val) | |
2302 | tab[look].gt_entry.gt_bytes += add; | |
2303 | ||
2304 | if (tab[look].gt_entry.gt_g_value == val) | |
2305 | exact = true; | |
2306 | } | |
2307 | ||
2308 | if (! exact) | |
2309 | { | |
2310 | Elf32_gptab *new_tab; | |
2311 | unsigned int max; | |
2312 | ||
2313 | /* We need a new table entry. */ | |
2314 | new_tab = ((Elf32_gptab *) | |
2315 | realloc ((PTR) tab, | |
2316 | (c + 1) * sizeof (Elf32_gptab))); | |
2317 | if (new_tab == NULL) | |
2318 | { | |
2319 | bfd_set_error (bfd_error_no_memory); | |
2320 | free (tab); | |
2321 | return false; | |
2322 | } | |
2323 | tab = new_tab; | |
2324 | tab[c].gt_entry.gt_g_value = val; | |
2325 | tab[c].gt_entry.gt_bytes = add; | |
2326 | ||
2327 | /* Merge in the size for the next smallest -G | |
2328 | value, since that will be implied by this new | |
2329 | value. */ | |
2330 | max = 0; | |
2331 | for (look = 1; look < c; look++) | |
2332 | { | |
2333 | if (tab[look].gt_entry.gt_g_value < val | |
2334 | && (max == 0 | |
2335 | || (tab[look].gt_entry.gt_g_value | |
2336 | > tab[max].gt_entry.gt_g_value))) | |
2337 | max = look; | |
2338 | } | |
2339 | if (max != 0) | |
2340 | tab[c].gt_entry.gt_bytes += | |
2341 | tab[max].gt_entry.gt_bytes; | |
2342 | ||
2343 | ++c; | |
2344 | } | |
2345 | ||
2346 | last = int_gptab.gt_entry.gt_bytes; | |
6e07e54f | 2347 | } |
aac6b32f ILT |
2348 | |
2349 | /* Hack: reset the SEC_HAS_CONTENTS flag so that | |
2350 | elf_link_input_bfd ignores this section. */ | |
2351 | input_section->flags &=~ SEC_HAS_CONTENTS; | |
6e07e54f | 2352 | } |
aac6b32f ILT |
2353 | |
2354 | /* The table must be sorted by -G value. */ | |
2355 | if (c > 2) | |
2356 | qsort (tab + 1, c - 1, sizeof (tab[0]), gptab_compare); | |
2357 | ||
2358 | /* Swap out the table. */ | |
2359 | ext_tab = ((Elf32_External_gptab *) | |
2360 | bfd_alloc (abfd, c * sizeof (Elf32_External_gptab))); | |
2361 | if (ext_tab == NULL) | |
6e07e54f | 2362 | { |
aac6b32f ILT |
2363 | bfd_set_error (bfd_error_no_memory); |
2364 | free (tab); | |
2365 | return false; | |
2366 | } | |
2367 | ||
2368 | for (i = 0; i < c; i++) | |
2369 | bfd_mips_elf32_swap_gptab_out (abfd, tab + i, ext_tab + i); | |
2370 | free (tab); | |
2371 | ||
2372 | o->_raw_size = c * sizeof (Elf32_External_gptab); | |
2373 | o->contents = (bfd_byte *) ext_tab; | |
2374 | ||
2375 | /* Skip this section later on (I don't think this currently | |
2376 | matters, but someday it might). */ | |
2377 | o->link_order_head = (struct bfd_link_order *) NULL; | |
2378 | } | |
2379 | } | |
2380 | ||
2381 | /* Get a value for the GP register. */ | |
2382 | if (elf_gp (abfd) == 0) | |
2383 | { | |
2384 | struct bfd_link_hash_entry *h; | |
2385 | ||
2386 | h = bfd_link_hash_lookup (info->hash, "_gp", false, false, true); | |
2387 | if (h != (struct bfd_link_hash_entry *) NULL | |
2388 | && h->type == bfd_link_hash_defined) | |
2389 | elf_gp (abfd) = (h->u.def.value | |
2390 | + h->u.def.section->output_section->vma | |
2391 | + h->u.def.section->output_offset); | |
2392 | else if (info->relocateable) | |
2393 | { | |
2394 | bfd_vma lo; | |
2395 | ||
2396 | /* Make up a value. */ | |
2397 | lo = (bfd_vma) -1; | |
2398 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) | |
2399 | { | |
2400 | if (o->vma < lo | |
2401 | && (strcmp (o->name, ".sbss") == 0 | |
2402 | || strcmp (o->name, ".sdata") == 0 | |
2403 | || strcmp (o->name, ".lit4") == 0 | |
2404 | || strcmp (o->name, ".lit8") == 0)) | |
2405 | lo = o->vma; | |
6e07e54f | 2406 | } |
aac6b32f ILT |
2407 | elf_gp (abfd) = lo + 0x8000; |
2408 | } | |
2409 | else | |
2410 | { | |
2411 | /* If the relocate_section function needs to do a reloc | |
2412 | involving the GP value, it should make a reloc_dangerous | |
2413 | callback to warn that GP is not defined. */ | |
6e07e54f ILT |
2414 | } |
2415 | } | |
b3c0fc57 | 2416 | |
aac6b32f ILT |
2417 | /* Invoke the regular ELF backend linker to do all the work. */ |
2418 | if (! bfd_elf32_bfd_final_link (abfd, info)) | |
2419 | return false; | |
2420 | ||
2421 | /* Now write out the computed sections. */ | |
2422 | ||
6e07e54f ILT |
2423 | if (reginfo_sec != (asection *) NULL) |
2424 | { | |
2425 | Elf32_External_RegInfo ext; | |
2426 | ||
2427 | bfd_mips_elf32_swap_reginfo_out (abfd, ®info, &ext); | |
2428 | if (! bfd_set_section_contents (abfd, reginfo_sec, (PTR) &ext, | |
2429 | (file_ptr) 0, sizeof ext)) | |
2430 | return false; | |
2431 | } | |
b3c0fc57 | 2432 | |
6e07e54f ILT |
2433 | if (mdebug_sec != (asection *) NULL) |
2434 | { | |
aac6b32f | 2435 | BFD_ASSERT (abfd->output_has_begun); |
9783e04a DM |
2436 | if (! bfd_ecoff_write_accumulated_debug (mdebug_handle, abfd, &debug, |
2437 | swap, info, | |
2438 | mdebug_sec->filepos)) | |
6e07e54f | 2439 | return false; |
9783e04a DM |
2440 | |
2441 | bfd_ecoff_debug_free (mdebug_handle, abfd, &debug, swap, info); | |
b3c0fc57 ILT |
2442 | } |
2443 | ||
aac6b32f | 2444 | if (gptab_data_sec != (asection *) NULL) |
6e07e54f | 2445 | { |
aac6b32f ILT |
2446 | if (! bfd_set_section_contents (abfd, gptab_data_sec, |
2447 | gptab_data_sec->contents, | |
2448 | (file_ptr) 0, | |
2449 | gptab_data_sec->_raw_size)) | |
2450 | return false; | |
2451 | } | |
2452 | ||
2453 | if (gptab_bss_sec != (asection *) NULL) | |
2454 | { | |
2455 | if (! bfd_set_section_contents (abfd, gptab_bss_sec, | |
2456 | gptab_bss_sec->contents, | |
2457 | (file_ptr) 0, | |
2458 | gptab_bss_sec->_raw_size)) | |
2459 | return false; | |
6e07e54f ILT |
2460 | } |
2461 | ||
2462 | return true; | |
b3c0fc57 | 2463 | } |
6e07e54f | 2464 | |
aac6b32f | 2465 | /* Handle a MIPS ELF HI16 reloc. */ |
b3c0fc57 ILT |
2466 | |
2467 | static void | |
aac6b32f ILT |
2468 | mips_elf_relocate_hi16 (input_bfd, relhi, rello, contents, addend) |
2469 | bfd *input_bfd; | |
2470 | Elf_Internal_Rela *relhi; | |
2471 | Elf_Internal_Rela *rello; | |
2472 | bfd_byte *contents; | |
2473 | bfd_vma addend; | |
b3c0fc57 | 2474 | { |
aac6b32f ILT |
2475 | bfd_vma insn; |
2476 | bfd_vma addlo; | |
b3c0fc57 | 2477 | |
aac6b32f ILT |
2478 | insn = bfd_get_32 (input_bfd, contents + relhi->r_offset); |
2479 | ||
2480 | addlo = bfd_get_32 (input_bfd, contents + rello->r_offset); | |
2481 | addlo &= 0xffff; | |
2482 | ||
2483 | addend += ((insn & 0xffff) << 16) + addlo; | |
2484 | ||
2485 | if ((addlo & 0x8000) != 0) | |
2486 | addend -= 0x10000; | |
2487 | if ((addend & 0x8000) != 0) | |
2488 | addend += 0x10000; | |
2489 | ||
2490 | bfd_put_32 (input_bfd, | |
2491 | (insn & 0xffff0000) | ((addend >> 16) & 0xffff), | |
2492 | contents + relhi->r_offset); | |
2493 | } | |
2494 | ||
2495 | /* Relocate a MIPS ELF section. */ | |
2496 | ||
2497 | static boolean | |
2498 | mips_elf_relocate_section (output_bfd, info, input_bfd, input_section, | |
82b1edf7 | 2499 | contents, relocs, local_syms, local_sections) |
aac6b32f ILT |
2500 | bfd *output_bfd; |
2501 | struct bfd_link_info *info; | |
2502 | bfd *input_bfd; | |
2503 | asection *input_section; | |
2504 | bfd_byte *contents; | |
2505 | Elf_Internal_Rela *relocs; | |
2506 | Elf_Internal_Sym *local_syms; | |
2507 | asection **local_sections; | |
2508 | { | |
2509 | Elf_Internal_Shdr *symtab_hdr; | |
2510 | size_t locsymcount; | |
2511 | size_t extsymoff; | |
2512 | Elf_Internal_Rela *rel; | |
2513 | Elf_Internal_Rela *relend; | |
2514 | ||
2515 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
2516 | ||
2517 | if (elf_bad_symtab (input_bfd)) | |
b3c0fc57 | 2518 | { |
aac6b32f ILT |
2519 | locsymcount = symtab_hdr->sh_size / sizeof (Elf32_External_Sym); |
2520 | extsymoff = 0; | |
2521 | } | |
2522 | else | |
2523 | { | |
2524 | locsymcount = symtab_hdr->sh_info; | |
2525 | extsymoff = symtab_hdr->sh_info; | |
2526 | } | |
2527 | ||
2528 | rel = relocs; | |
2529 | relend = relocs + input_section->reloc_count; | |
2530 | for (; rel < relend; rel++) | |
2531 | { | |
2532 | int r_type; | |
82b1edf7 | 2533 | reloc_howto_type *howto; |
aac6b32f ILT |
2534 | long r_symndx; |
2535 | bfd_vma addend; | |
2536 | struct elf_link_hash_entry *h; | |
2537 | asection *sec; | |
2538 | Elf_Internal_Sym *sym; | |
2539 | bfd_reloc_status_type r; | |
2540 | ||
2541 | r_type = ELF32_R_TYPE (rel->r_info); | |
2542 | if (r_type < 0 || r_type >= (int) R_MIPS_max) | |
6e07e54f | 2543 | { |
aac6b32f ILT |
2544 | bfd_set_error (bfd_error_bad_value); |
2545 | return false; | |
6e07e54f | 2546 | } |
aac6b32f | 2547 | howto = elf_mips_howto_table + r_type; |
b3c0fc57 | 2548 | |
aac6b32f ILT |
2549 | r_symndx = ELF32_R_SYM (rel->r_info); |
2550 | ||
2551 | /* Mix in the change in GP address for a GP relative reloc. */ | |
2552 | if (r_type != R_MIPS_GPREL16 | |
2553 | && r_type != R_MIPS_LITERAL | |
2554 | && r_type != R_MIPS_GPREL32) | |
2555 | addend = 0; | |
2556 | else | |
b3c0fc57 | 2557 | { |
aac6b32f ILT |
2558 | if (elf_gp (output_bfd) == 0) |
2559 | { | |
2560 | if (! ((*info->callbacks->reloc_dangerous) | |
2561 | (info, | |
2562 | "GP relative relocation when GP not defined", | |
2563 | input_bfd, input_section, | |
2564 | rel->r_offset))) | |
2565 | return false; | |
2566 | /* Only give the error once per link. */ | |
2567 | elf_gp (output_bfd) = 4; | |
2568 | } | |
2569 | ||
2570 | if (r_symndx < extsymoff | |
2571 | || (elf_bad_symtab (input_bfd) | |
2572 | && local_sections[r_symndx] != NULL)) | |
2573 | { | |
2574 | /* This is a relocation against a section. The current | |
2575 | addend in the instruction is the difference between | |
2576 | INPUT_SECTION->vma and the GP value of INPUT_BFD. We | |
2577 | must change this to be the difference between the | |
2578 | final definition (which will end up in RELOCATION) | |
2579 | and the GP value of OUTPUT_BFD (which is in GP). */ | |
2580 | addend = elf_gp (input_bfd) - elf_gp (output_bfd); | |
2581 | } | |
2582 | else if (! info->relocateable) | |
2583 | { | |
2584 | /* We are doing a final link. The current addend in the | |
2585 | instruction is simply the desired offset into the | |
2586 | symbol (normally zero). We want the instruction to | |
2587 | hold the difference between the final definition of | |
2588 | the symbol (which will end up in RELOCATION) and the | |
2589 | GP value of OUTPUT_BFD (which is in GP). */ | |
2590 | addend = - elf_gp (output_bfd); | |
2591 | } | |
2592 | else | |
2593 | { | |
2594 | /* We are generating relocateable output, and we aren't | |
2595 | going to define this symbol, so we just leave the | |
2596 | instruction alone. */ | |
2597 | addend = 0; | |
2598 | } | |
b3c0fc57 | 2599 | } |
b3c0fc57 | 2600 | |
aac6b32f ILT |
2601 | h = NULL; |
2602 | sym = NULL; | |
2603 | sec = NULL; | |
2604 | if (info->relocateable) | |
2605 | { | |
2606 | /* This is a relocateable link. We don't have to change | |
2607 | anything, unless the reloc is against a section symbol, | |
2608 | in which case we have to adjust according to where the | |
2609 | section symbol winds up in the output section. */ | |
2610 | if (r_symndx >= locsymcount | |
2611 | || (elf_bad_symtab (input_bfd) | |
2612 | && local_sections[r_symndx] == NULL)) | |
2613 | r = bfd_reloc_ok; | |
2614 | else | |
2615 | { | |
2616 | sym = local_syms + r_symndx; | |
2617 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) | |
2618 | r = bfd_reloc_ok; | |
2619 | else | |
2620 | { | |
2621 | sec = local_sections[r_symndx]; | |
2622 | ||
2623 | /* It would be logical to add sym->st_value here, | |
2624 | but Irix 5 sometimes generates a garbage symbol | |
2625 | value. */ | |
2626 | addend += sec->output_offset; | |
2627 | ||
2628 | /* If this is HI16 with an associated LO16, adjust | |
2629 | the addend accordingly. Otherwise, just | |
2630 | relocate. */ | |
2631 | if (r_type != R_MIPS_HI16 | |
2632 | || (rel + 1) >= relend | |
2633 | || ELF32_R_TYPE ((rel + 1)->r_info) != R_MIPS_LO16) | |
2634 | r = _bfd_relocate_contents (howto, input_bfd, | |
2635 | addend, | |
2636 | contents + rel->r_offset); | |
2637 | else | |
2638 | { | |
2639 | mips_elf_relocate_hi16 (input_bfd, rel, rel + 1, | |
2640 | contents, addend); | |
2641 | r = bfd_reloc_ok; | |
2642 | } | |
2643 | } | |
2644 | } | |
2645 | } | |
2646 | else | |
2647 | { | |
2648 | bfd_vma relocation; | |
2649 | ||
2650 | /* This is a final link. */ | |
2651 | sym = NULL; | |
2652 | if (r_symndx < extsymoff | |
2653 | || (elf_bad_symtab (input_bfd) | |
2654 | && local_sections[r_symndx] != NULL)) | |
2655 | { | |
2656 | sym = local_syms + r_symndx; | |
2657 | sec = local_sections[r_symndx]; | |
2658 | relocation = (sec->output_section->vma | |
2659 | + sec->output_offset); | |
2660 | ||
2661 | /* It would be logical to always add sym->st_value here, | |
2662 | but Irix 5 sometimes generates a garbage symbol | |
2663 | value. */ | |
2664 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) | |
2665 | relocation += sym->st_value; | |
2666 | } | |
2667 | else | |
2668 | { | |
2669 | long indx; | |
2670 | ||
2671 | indx = r_symndx - extsymoff; | |
2672 | h = elf_sym_hashes (input_bfd)[indx]; | |
a16fcab3 KR |
2673 | if (h->root.type == bfd_link_hash_defined |
2674 | || h->root.type == bfd_link_hash_defweak) | |
aac6b32f ILT |
2675 | { |
2676 | sec = h->root.u.def.section; | |
2677 | relocation = (h->root.u.def.value | |
2678 | + sec->output_section->vma | |
2679 | + sec->output_offset); | |
2680 | } | |
a16fcab3 | 2681 | else if (h->root.type == bfd_link_hash_undefweak) |
aac6b32f ILT |
2682 | relocation = 0; |
2683 | else | |
2684 | { | |
2685 | if (! ((*info->callbacks->undefined_symbol) | |
2686 | (info, h->root.root.string, input_bfd, | |
2687 | input_section, rel->r_offset))) | |
2688 | return false; | |
2689 | relocation = 0; | |
2690 | } | |
2691 | } | |
2692 | ||
2693 | if (r_type != R_MIPS_HI16 | |
2694 | || (rel + 1) >= relend | |
2695 | || ELF32_R_TYPE ((rel + 1)->r_info) != R_MIPS_LO16) | |
2696 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
2697 | contents, rel->r_offset, | |
2698 | relocation, addend); | |
2699 | else | |
2700 | { | |
2701 | mips_elf_relocate_hi16 (input_bfd, rel, rel + 1, | |
2702 | contents, relocation + addend); | |
2703 | r = bfd_reloc_ok; | |
2704 | } | |
2705 | } | |
2706 | ||
2707 | if (r != bfd_reloc_ok) | |
2708 | { | |
2709 | switch (r) | |
2710 | { | |
2711 | default: | |
2712 | case bfd_reloc_outofrange: | |
2713 | abort (); | |
2714 | case bfd_reloc_overflow: | |
2715 | { | |
2716 | const char *name; | |
2717 | ||
2718 | if (h != NULL) | |
2719 | name = h->root.root.string; | |
2720 | else | |
2721 | { | |
82b1edf7 KR |
2722 | name = elf_string_from_elf_section (input_bfd, |
2723 | symtab_hdr->sh_link, | |
2724 | sym->st_name); | |
aac6b32f ILT |
2725 | if (name == NULL) |
2726 | return false; | |
2727 | if (*name == '\0') | |
2728 | name = bfd_section_name (input_bfd, sec); | |
2729 | } | |
2730 | if (! ((*info->callbacks->reloc_overflow) | |
2731 | (info, name, howto->name, (bfd_vma) 0, | |
2732 | input_bfd, input_section, rel->r_offset))) | |
2733 | return false; | |
2734 | } | |
2735 | break; | |
2736 | } | |
2737 | } | |
b3c0fc57 | 2738 | } |
aac6b32f ILT |
2739 | |
2740 | return true; | |
b3c0fc57 ILT |
2741 | } |
2742 | \f | |
a16fcab3 KR |
2743 | /* This is almost identical to bfd_generic_get_... except that some |
2744 | MIPS relocations need to be handled specially. Sigh. */ | |
2745 | static bfd_byte * | |
2746 | elf32_mips_get_relocated_section_contents (abfd, link_info, link_order, data, | |
2747 | relocateable, symbols) | |
2748 | bfd *abfd; | |
2749 | struct bfd_link_info *link_info; | |
2750 | struct bfd_link_order *link_order; | |
2751 | bfd_byte *data; | |
2752 | boolean relocateable; | |
2753 | asymbol **symbols; | |
2754 | { | |
2755 | /* Get enough memory to hold the stuff */ | |
2756 | bfd *input_bfd = link_order->u.indirect.section->owner; | |
2757 | asection *input_section = link_order->u.indirect.section; | |
2758 | ||
2759 | long reloc_size = bfd_get_reloc_upper_bound (input_bfd, input_section); | |
2760 | arelent **reloc_vector = NULL; | |
2761 | long reloc_count; | |
2762 | ||
2763 | if (reloc_size < 0) | |
2764 | goto error_return; | |
2765 | ||
2766 | reloc_vector = (arelent **) malloc (reloc_size); | |
2767 | if (reloc_vector == NULL && reloc_size != 0) | |
2768 | { | |
2769 | bfd_set_error (bfd_error_no_memory); | |
2770 | goto error_return; | |
2771 | } | |
2772 | ||
2773 | /* read in the section */ | |
2774 | if (!bfd_get_section_contents (input_bfd, | |
2775 | input_section, | |
2776 | (PTR) data, | |
2777 | 0, | |
2778 | input_section->_raw_size)) | |
2779 | goto error_return; | |
2780 | ||
2781 | /* We're not relaxing the section, so just copy the size info */ | |
2782 | input_section->_cooked_size = input_section->_raw_size; | |
2783 | input_section->reloc_done = true; | |
2784 | ||
2785 | reloc_count = bfd_canonicalize_reloc (input_bfd, | |
2786 | input_section, | |
2787 | reloc_vector, | |
2788 | symbols); | |
2789 | if (reloc_count < 0) | |
2790 | goto error_return; | |
2791 | ||
2792 | if (reloc_count > 0) | |
2793 | { | |
2794 | arelent **parent; | |
2795 | /* for mips */ | |
2796 | int gp_found; | |
2797 | bfd_vma gp; | |
2798 | ||
2799 | { | |
2800 | struct bfd_hash_entry *h; | |
2801 | struct bfd_link_hash_entry *lh; | |
2802 | /* Skip all this stuff if we aren't mixing formats. */ | |
2803 | if (abfd && input_bfd | |
2804 | && abfd->xvec == input_bfd->xvec) | |
2805 | lh = 0; | |
2806 | else | |
2807 | { | |
2808 | h = bfd_hash_lookup (link_info->hash, "_gp", false, false); | |
2809 | lh = (struct bfd_link_hash_entry *) h; | |
2810 | } | |
2811 | lookup: | |
2812 | if (lh) | |
2813 | { | |
2814 | switch (lh->type) | |
2815 | { | |
2816 | case bfd_link_hash_undefined: | |
2817 | case bfd_link_hash_undefweak: | |
2818 | case bfd_link_hash_common: | |
2819 | gp_found = 0; | |
2820 | break; | |
2821 | case bfd_link_hash_defined: | |
2822 | case bfd_link_hash_defweak: | |
2823 | gp_found = 1; | |
2824 | gp = lh->u.def.value; | |
2825 | break; | |
2826 | case bfd_link_hash_indirect: | |
2827 | case bfd_link_hash_warning: | |
2828 | lh = lh->u.i.link; | |
2829 | /* @@FIXME ignoring warning for now */ | |
2830 | goto lookup; | |
2831 | case bfd_link_hash_new: | |
2832 | default: | |
2833 | abort (); | |
2834 | } | |
2835 | } | |
2836 | else | |
2837 | gp_found = 0; | |
2838 | } | |
2839 | /* end mips */ | |
2840 | for (parent = reloc_vector; *parent != (arelent *) NULL; | |
2841 | parent++) | |
2842 | { | |
2843 | char *error_message = (char *) NULL; | |
2844 | bfd_reloc_status_type r; | |
2845 | ||
2846 | /* Specific to MIPS: Deal with relocation types that require | |
2847 | knowing the gp of the output bfd. */ | |
2848 | asymbol *sym = *(*parent)->sym_ptr_ptr; | |
2849 | if (bfd_is_abs_section (sym->section) && abfd) | |
2850 | { | |
2851 | /* The special_function wouldn't get called anyways. */ | |
2852 | } | |
2853 | else if (!gp_found) | |
2854 | { | |
2855 | /* The gp isn't there; let the special function code | |
2856 | fall over on its own. */ | |
2857 | } | |
2858 | else if ((*parent)->howto->special_function == mips_elf_gprel16_reloc) | |
2859 | { | |
2860 | /* bypass special_function call */ | |
2861 | r = gprel16_with_gp (input_bfd, sym, *parent, input_section, | |
2862 | relocateable, (PTR) data, gp); | |
2863 | goto skip_bfd_perform_relocation; | |
2864 | } | |
2865 | /* end mips specific stuff */ | |
2866 | ||
2867 | r = bfd_perform_relocation (input_bfd, | |
2868 | *parent, | |
2869 | (PTR) data, | |
2870 | input_section, | |
2871 | relocateable ? abfd : (bfd *) NULL, | |
2872 | &error_message); | |
2873 | skip_bfd_perform_relocation: | |
2874 | ||
2875 | if (relocateable) | |
2876 | { | |
2877 | asection *os = input_section->output_section; | |
2878 | ||
2879 | /* A partial link, so keep the relocs */ | |
2880 | os->orelocation[os->reloc_count] = *parent; | |
2881 | os->reloc_count++; | |
2882 | } | |
2883 | ||
2884 | if (r != bfd_reloc_ok) | |
2885 | { | |
2886 | switch (r) | |
2887 | { | |
2888 | case bfd_reloc_undefined: | |
2889 | if (!((*link_info->callbacks->undefined_symbol) | |
2890 | (link_info, bfd_asymbol_name (*(*parent)->sym_ptr_ptr), | |
2891 | input_bfd, input_section, (*parent)->address))) | |
2892 | goto error_return; | |
2893 | break; | |
2894 | case bfd_reloc_dangerous: | |
2895 | BFD_ASSERT (error_message != (char *) NULL); | |
2896 | if (!((*link_info->callbacks->reloc_dangerous) | |
2897 | (link_info, error_message, input_bfd, input_section, | |
2898 | (*parent)->address))) | |
2899 | goto error_return; | |
2900 | break; | |
2901 | case bfd_reloc_overflow: | |
2902 | if (!((*link_info->callbacks->reloc_overflow) | |
2903 | (link_info, bfd_asymbol_name (*(*parent)->sym_ptr_ptr), | |
2904 | (*parent)->howto->name, (*parent)->addend, | |
2905 | input_bfd, input_section, (*parent)->address))) | |
2906 | goto error_return; | |
2907 | break; | |
2908 | case bfd_reloc_outofrange: | |
2909 | default: | |
2910 | abort (); | |
2911 | break; | |
2912 | } | |
2913 | ||
2914 | } | |
2915 | } | |
2916 | } | |
2917 | if (reloc_vector != NULL) | |
2918 | free (reloc_vector); | |
2919 | return data; | |
2920 | ||
2921 | error_return: | |
2922 | if (reloc_vector != NULL) | |
2923 | free (reloc_vector); | |
2924 | return NULL; | |
2925 | } | |
2926 | #define bfd_elf32_bfd_get_relocated_section_contents elf32_mips_get_relocated_section_contents | |
2927 | \f | |
6e07e54f ILT |
2928 | /* ECOFF swapping routines. These are used when dealing with the |
2929 | .mdebug section, which is in the ECOFF debugging format. */ | |
2930 | static const struct ecoff_debug_swap mips_elf_ecoff_debug_swap = | |
2931 | { | |
2932 | /* Symbol table magic number. */ | |
2933 | magicSym, | |
2934 | /* Alignment of debugging information. E.g., 4. */ | |
2935 | 4, | |
2936 | /* Sizes of external symbolic information. */ | |
2937 | sizeof (struct hdr_ext), | |
2938 | sizeof (struct dnr_ext), | |
2939 | sizeof (struct pdr_ext), | |
2940 | sizeof (struct sym_ext), | |
2941 | sizeof (struct opt_ext), | |
2942 | sizeof (struct fdr_ext), | |
2943 | sizeof (struct rfd_ext), | |
2944 | sizeof (struct ext_ext), | |
2945 | /* Functions to swap in external symbolic data. */ | |
2946 | ecoff_swap_hdr_in, | |
2947 | ecoff_swap_dnr_in, | |
2948 | ecoff_swap_pdr_in, | |
2949 | ecoff_swap_sym_in, | |
2950 | ecoff_swap_opt_in, | |
2951 | ecoff_swap_fdr_in, | |
2952 | ecoff_swap_rfd_in, | |
2953 | ecoff_swap_ext_in, | |
75f3ef7a ILT |
2954 | _bfd_ecoff_swap_tir_in, |
2955 | _bfd_ecoff_swap_rndx_in, | |
6e07e54f ILT |
2956 | /* Functions to swap out external symbolic data. */ |
2957 | ecoff_swap_hdr_out, | |
2958 | ecoff_swap_dnr_out, | |
2959 | ecoff_swap_pdr_out, | |
2960 | ecoff_swap_sym_out, | |
2961 | ecoff_swap_opt_out, | |
2962 | ecoff_swap_fdr_out, | |
2963 | ecoff_swap_rfd_out, | |
aac6b32f | 2964 | ecoff_swap_ext_out, |
75f3ef7a ILT |
2965 | _bfd_ecoff_swap_tir_out, |
2966 | _bfd_ecoff_swap_rndx_out, | |
aac6b32f ILT |
2967 | /* Function to read in symbolic data. */ |
2968 | mips_elf_read_ecoff_info | |
6e07e54f ILT |
2969 | }; |
2970 | \f | |
6b4b4d17 JK |
2971 | #define TARGET_LITTLE_SYM bfd_elf32_littlemips_vec |
2972 | #define TARGET_LITTLE_NAME "elf32-littlemips" | |
2973 | #define TARGET_BIG_SYM bfd_elf32_bigmips_vec | |
2974 | #define TARGET_BIG_NAME "elf32-bigmips" | |
2975 | #define ELF_ARCH bfd_arch_mips | |
6e07e54f | 2976 | #define ELF_MACHINE_CODE EM_MIPS |
b3c0fc57 | 2977 | #define ELF_MAXPAGESIZE 0x10000 |
497c5434 | 2978 | #define elf_backend_collect true |
b3c0fc57 ILT |
2979 | #define elf_info_to_howto 0 |
2980 | #define elf_info_to_howto_rel mips_info_to_howto_rel | |
6e07e54f ILT |
2981 | #define elf_backend_sym_is_global mips_elf_sym_is_global |
2982 | #define elf_backend_object_p mips_elf_object_p | |
b3c0fc57 ILT |
2983 | #define elf_backend_section_from_shdr mips_elf_section_from_shdr |
2984 | #define elf_backend_fake_sections mips_elf_fake_sections | |
2985 | #define elf_backend_section_from_bfd_section \ | |
2986 | mips_elf_section_from_bfd_section | |
2987 | #define elf_backend_section_processing mips_elf_section_processing | |
2988 | #define elf_backend_symbol_processing mips_elf_symbol_processing | |
6e07e54f ILT |
2989 | #define elf_backend_final_write_processing \ |
2990 | mips_elf_final_write_processing | |
2991 | #define elf_backend_ecoff_debug_swap &mips_elf_ecoff_debug_swap | |
b3c0fc57 | 2992 | |
a16fcab3 KR |
2993 | #define bfd_elf32_find_nearest_line mips_elf_find_nearest_line |
2994 | ||
aac6b32f ILT |
2995 | #define bfd_elf32_bfd_link_hash_table_create \ |
2996 | mips_elf_link_hash_table_create | |
6e07e54f | 2997 | #define bfd_elf32_bfd_final_link mips_elf_final_link |
aac6b32f ILT |
2998 | #define elf_backend_relocate_section mips_elf_relocate_section |
2999 | #define elf_backend_add_symbol_hook mips_elf_add_symbol_hook | |
6b4b4d17 JK |
3000 | |
3001 | #include "elf32-target.h" |