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 *)); | |
87 | static struct bfd_hash_entry *mips_elf_link_hash_newfunc | |
88 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); | |
89 | static struct bfd_link_hash_table *mips_elf_link_hash_table_create | |
90 | PARAMS ((bfd *)); | |
91 | static int gptab_compare PARAMS ((const void *, const void *)); | |
92 | static boolean mips_elf_final_link | |
93 | PARAMS ((bfd *, struct bfd_link_info *)); | |
94 | static void mips_elf_relocate_hi16 | |
95 | PARAMS ((bfd *, Elf_Internal_Rela *, Elf_Internal_Rela *, bfd_byte *, | |
96 | bfd_vma)); | |
97 | static boolean mips_elf_relocate_section | |
98 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, | |
82b1edf7 | 99 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); |
aac6b32f ILT |
100 | static boolean mips_elf_add_symbol_hook |
101 | PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *, | |
102 | const char **, flagword *, asection **, bfd_vma *)); | |
b3c0fc57 ILT |
103 | |
104 | #define USE_REL 1 /* MIPS uses REL relocations instead of RELA */ | |
105 | ||
106 | enum reloc_type | |
107 | { | |
108 | R_MIPS_NONE = 0, | |
109 | R_MIPS_16, R_MIPS_32, | |
110 | R_MIPS_REL32, R_MIPS_26, | |
111 | R_MIPS_HI16, R_MIPS_LO16, | |
112 | R_MIPS_GPREL16, R_MIPS_LITERAL, | |
113 | R_MIPS_GOT16, R_MIPS_PC16, | |
114 | R_MIPS_CALL16, R_MIPS_GPREL32, | |
6a5848cd ILT |
115 | /* The remaining relocs are defined on Irix, although they are not |
116 | in the MIPS ELF ABI. */ | |
117 | R_MIPS_UNUSED1, R_MIPS_UNUSED2, | |
118 | R_MIPS_UNUSED3, | |
119 | R_MIPS_SHIFT5, R_MIPS_SHIFT6, | |
120 | R_MIPS_64, R_MIPS_GOT_DISP, | |
121 | R_MIPS_GOT_PAGE, R_MIPS_GOT_OFST, | |
122 | R_MIPS_GOT_HI16, R_MIPS_GOT_LO16, | |
123 | R_MIPS_SUB, R_MIPS_INSERT_A, | |
124 | R_MIPS_INSERT_B, R_MIPS_DELETE, | |
125 | R_MIPS_HIGHER, R_MIPS_HIGHEST, | |
126 | R_MIPS_CALL_HI16, R_MIPS_CALL_LO16, | |
b3c0fc57 ILT |
127 | R_MIPS_max |
128 | }; | |
129 | ||
130 | static reloc_howto_type elf_mips_howto_table[] = | |
131 | { | |
132 | /* No relocation. */ | |
133 | HOWTO (R_MIPS_NONE, /* type */ | |
134 | 0, /* rightshift */ | |
135 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
136 | 0, /* bitsize */ | |
137 | false, /* pc_relative */ | |
138 | 0, /* bitpos */ | |
139 | complain_overflow_dont, /* complain_on_overflow */ | |
140 | bfd_elf_generic_reloc, /* special_function */ | |
141 | "R_MIPS_NONE", /* name */ | |
142 | false, /* partial_inplace */ | |
143 | 0, /* src_mask */ | |
144 | 0, /* dst_mask */ | |
145 | false), /* pcrel_offset */ | |
146 | ||
147 | /* 16 bit relocation. */ | |
148 | HOWTO (R_MIPS_16, /* type */ | |
149 | 0, /* rightshift */ | |
150 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
151 | 16, /* bitsize */ | |
152 | false, /* pc_relative */ | |
153 | 0, /* bitpos */ | |
154 | complain_overflow_bitfield, /* complain_on_overflow */ | |
155 | bfd_elf_generic_reloc, /* special_function */ | |
156 | "R_MIPS_16", /* name */ | |
157 | true, /* partial_inplace */ | |
158 | 0xffff, /* src_mask */ | |
159 | 0xffff, /* dst_mask */ | |
160 | false), /* pcrel_offset */ | |
161 | ||
162 | /* 32 bit relocation. */ | |
163 | HOWTO (R_MIPS_32, /* type */ | |
164 | 0, /* rightshift */ | |
165 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
166 | 32, /* bitsize */ | |
167 | false, /* pc_relative */ | |
168 | 0, /* bitpos */ | |
169 | complain_overflow_bitfield, /* complain_on_overflow */ | |
170 | bfd_elf_generic_reloc, /* special_function */ | |
171 | "R_MIPS_32", /* name */ | |
172 | true, /* partial_inplace */ | |
173 | 0xffffffff, /* src_mask */ | |
174 | 0xffffffff, /* dst_mask */ | |
175 | false), /* pcrel_offset */ | |
176 | ||
177 | /* 32 bit symbol relative relocation. */ | |
178 | HOWTO (R_MIPS_REL32, /* type */ | |
179 | 0, /* rightshift */ | |
180 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
181 | 32, /* bitsize */ | |
182 | false, /* pc_relative */ | |
183 | 0, /* bitpos */ | |
184 | complain_overflow_bitfield, /* complain_on_overflow */ | |
185 | bfd_elf_generic_reloc, /* special_function */ | |
186 | "R_MIPS_REL32", /* name */ | |
187 | true, /* partial_inplace */ | |
188 | 0xffffffff, /* src_mask */ | |
189 | 0xffffffff, /* dst_mask */ | |
190 | false), /* pcrel_offset */ | |
191 | ||
192 | /* 26 bit branch address. */ | |
193 | HOWTO (R_MIPS_26, /* type */ | |
194 | 2, /* rightshift */ | |
195 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
196 | 26, /* bitsize */ | |
197 | false, /* pc_relative */ | |
198 | 0, /* bitpos */ | |
6e07e54f ILT |
199 | complain_overflow_dont, /* complain_on_overflow */ |
200 | /* This needs complex overflow | |
201 | detection, because the upper four | |
202 | bits must match the PC. */ | |
b3c0fc57 ILT |
203 | bfd_elf_generic_reloc, /* special_function */ |
204 | "R_MIPS_26", /* name */ | |
205 | true, /* partial_inplace */ | |
206 | 0x3ffffff, /* src_mask */ | |
207 | 0x3ffffff, /* dst_mask */ | |
208 | false), /* pcrel_offset */ | |
209 | ||
210 | /* High 16 bits of symbol value. */ | |
211 | HOWTO (R_MIPS_HI16, /* type */ | |
212 | 0, /* rightshift */ | |
213 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
214 | 16, /* bitsize */ | |
215 | false, /* pc_relative */ | |
216 | 0, /* bitpos */ | |
217 | complain_overflow_dont, /* complain_on_overflow */ | |
218 | mips_elf_hi16_reloc, /* special_function */ | |
219 | "R_MIPS_HI16", /* name */ | |
220 | true, /* partial_inplace */ | |
221 | 0xffff, /* src_mask */ | |
222 | 0xffff, /* dst_mask */ | |
223 | false), /* pcrel_offset */ | |
224 | ||
225 | /* Low 16 bits of symbol value. */ | |
226 | HOWTO (R_MIPS_LO16, /* type */ | |
227 | 0, /* rightshift */ | |
228 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
229 | 16, /* bitsize */ | |
230 | false, /* pc_relative */ | |
231 | 0, /* bitpos */ | |
232 | complain_overflow_dont, /* complain_on_overflow */ | |
233 | mips_elf_lo16_reloc, /* special_function */ | |
234 | "R_MIPS_LO16", /* name */ | |
235 | true, /* partial_inplace */ | |
236 | 0xffff, /* src_mask */ | |
237 | 0xffff, /* dst_mask */ | |
238 | false), /* pcrel_offset */ | |
239 | ||
240 | /* GP relative reference. */ | |
241 | HOWTO (R_MIPS_GPREL16, /* type */ | |
242 | 0, /* rightshift */ | |
243 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
244 | 16, /* bitsize */ | |
245 | false, /* pc_relative */ | |
246 | 0, /* bitpos */ | |
247 | complain_overflow_signed, /* complain_on_overflow */ | |
248 | mips_elf_gprel16_reloc, /* special_function */ | |
249 | "R_MIPS_GPREL16", /* name */ | |
250 | true, /* partial_inplace */ | |
251 | 0xffff, /* src_mask */ | |
252 | 0xffff, /* dst_mask */ | |
253 | false), /* pcrel_offset */ | |
254 | ||
255 | /* Reference to literal section. */ | |
256 | HOWTO (R_MIPS_LITERAL, /* type */ | |
257 | 0, /* rightshift */ | |
258 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
259 | 16, /* bitsize */ | |
260 | false, /* pc_relative */ | |
261 | 0, /* bitpos */ | |
262 | complain_overflow_signed, /* complain_on_overflow */ | |
263 | mips_elf_gprel16_reloc, /* special_function */ | |
264 | "R_MIPS_LITERAL", /* name */ | |
265 | true, /* partial_inplace */ | |
266 | 0xffff, /* src_mask */ | |
267 | 0xffff, /* dst_mask */ | |
268 | false), /* pcrel_offset */ | |
269 | ||
270 | /* Reference to global offset table. */ | |
271 | /* FIXME: This is not handled correctly. */ | |
272 | HOWTO (R_MIPS_GOT16, /* type */ | |
273 | 0, /* rightshift */ | |
274 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
275 | 16, /* bitsize */ | |
276 | false, /* pc_relative */ | |
277 | 0, /* bitpos */ | |
278 | complain_overflow_signed, /* complain_on_overflow */ | |
6e07e54f | 279 | mips_elf_got16_reloc, /* special_function */ |
b3c0fc57 ILT |
280 | "R_MIPS_GOT16", /* name */ |
281 | false, /* partial_inplace */ | |
282 | 0, /* src_mask */ | |
283 | 0xffff, /* dst_mask */ | |
284 | false), /* pcrel_offset */ | |
285 | ||
286 | /* 16 bit PC relative reference. */ | |
287 | HOWTO (R_MIPS_PC16, /* type */ | |
288 | 0, /* rightshift */ | |
289 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
290 | 16, /* bitsize */ | |
291 | true, /* pc_relative */ | |
292 | 0, /* bitpos */ | |
293 | complain_overflow_signed, /* complain_on_overflow */ | |
294 | bfd_elf_generic_reloc, /* special_function */ | |
295 | "R_MIPS_PC16", /* name */ | |
296 | true, /* partial_inplace */ | |
297 | 0xffff, /* src_mask */ | |
298 | 0xffff, /* dst_mask */ | |
299 | false), /* pcrel_offset */ | |
300 | ||
301 | /* 16 bit call through global offset table. */ | |
302 | /* FIXME: This is not handled correctly. */ | |
303 | HOWTO (R_MIPS_CALL16, /* type */ | |
304 | 0, /* rightshift */ | |
305 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
306 | 16, /* bitsize */ | |
307 | false, /* pc_relative */ | |
308 | 0, /* bitpos */ | |
309 | complain_overflow_signed, /* complain_on_overflow */ | |
310 | bfd_elf_generic_reloc, /* special_function */ | |
311 | "R_MIPS_CALL16", /* name */ | |
312 | false, /* partial_inplace */ | |
313 | 0, /* src_mask */ | |
314 | 0xffff, /* dst_mask */ | |
315 | false), /* pcrel_offset */ | |
316 | ||
317 | /* 32 bit GP relative reference. */ | |
318 | /* FIXME: This is not handled correctly. */ | |
319 | HOWTO (R_MIPS_GPREL32, /* type */ | |
320 | 0, /* rightshift */ | |
321 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
322 | 32, /* bitsize */ | |
323 | false, /* pc_relative */ | |
324 | 0, /* bitpos */ | |
325 | complain_overflow_bitfield, /* complain_on_overflow */ | |
326 | bfd_elf_generic_reloc, /* special_function */ | |
327 | "R_MIPS_GPREL32", /* name */ | |
328 | true, /* partial_inplace */ | |
329 | 0xffffffff, /* src_mask */ | |
330 | 0xffffffff, /* dst_mask */ | |
6a5848cd ILT |
331 | false), /* pcrel_offset */ |
332 | ||
333 | /* The remaining relocs are defined on Irix 5, although they are | |
334 | not defined by the ABI. */ | |
335 | { 13 }, | |
336 | { 14 }, | |
337 | { 15 }, | |
338 | ||
339 | /* A 5 bit shift field. */ | |
340 | HOWTO (R_MIPS_SHIFT5, /* type */ | |
341 | 0, /* rightshift */ | |
342 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
343 | 5, /* bitsize */ | |
344 | false, /* pc_relative */ | |
345 | 6, /* bitpos */ | |
346 | complain_overflow_bitfield, /* complain_on_overflow */ | |
347 | bfd_elf_generic_reloc, /* special_function */ | |
348 | "R_MIPS_SHIFT5", /* name */ | |
349 | true, /* partial_inplace */ | |
350 | 0x000007c0, /* src_mask */ | |
351 | 0x000007c0, /* dst_mask */ | |
352 | false), /* pcrel_offset */ | |
353 | ||
354 | /* A 6 bit shift field. */ | |
355 | /* FIXME: This is not handled correctly; a special function is | |
356 | needed to put the most significant bit in the right place. */ | |
357 | HOWTO (R_MIPS_SHIFT6, /* type */ | |
358 | 0, /* rightshift */ | |
359 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
360 | 6, /* bitsize */ | |
361 | false, /* pc_relative */ | |
362 | 6, /* bitpos */ | |
363 | complain_overflow_bitfield, /* complain_on_overflow */ | |
364 | bfd_elf_generic_reloc, /* special_function */ | |
365 | "R_MIPS_SHIFT6", /* name */ | |
366 | true, /* partial_inplace */ | |
367 | 0x000007c4, /* src_mask */ | |
368 | 0x000007c4, /* dst_mask */ | |
369 | false), /* pcrel_offset */ | |
370 | ||
371 | /* A 64 bit relocation. Presumably not used in 32 bit ELF. */ | |
372 | { R_MIPS_64 }, | |
373 | ||
374 | /* Displacement in the global offset table. */ | |
375 | /* FIXME: Not handled correctly. */ | |
376 | HOWTO (R_MIPS_GOT_DISP, /* type */ | |
377 | 0, /* rightshift */ | |
378 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
379 | 16, /* bitsize */ | |
380 | false, /* pc_relative */ | |
381 | 0, /* bitpos */ | |
382 | complain_overflow_bitfield, /* complain_on_overflow */ | |
383 | bfd_elf_generic_reloc, /* special_function */ | |
384 | "R_MIPS_GOT_DISP", /* name */ | |
385 | true, /* partial_inplace */ | |
386 | 0x0000ffff, /* src_mask */ | |
387 | 0x0000ffff, /* dst_mask */ | |
388 | false), /* pcrel_offset */ | |
389 | ||
390 | /* Displacement to page pointer in the global offset table. */ | |
391 | /* FIXME: Not handled correctly. */ | |
392 | HOWTO (R_MIPS_GOT_PAGE, /* type */ | |
393 | 0, /* rightshift */ | |
394 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
395 | 16, /* bitsize */ | |
396 | false, /* pc_relative */ | |
397 | 0, /* bitpos */ | |
398 | complain_overflow_bitfield, /* complain_on_overflow */ | |
399 | bfd_elf_generic_reloc, /* special_function */ | |
400 | "R_MIPS_GOT_PAGE", /* name */ | |
401 | true, /* partial_inplace */ | |
402 | 0x0000ffff, /* src_mask */ | |
403 | 0x0000ffff, /* dst_mask */ | |
404 | false), /* pcrel_offset */ | |
405 | ||
406 | /* Offset from page pointer in the global offset table. */ | |
407 | /* FIXME: Not handled correctly. */ | |
408 | HOWTO (R_MIPS_GOT_OFST, /* type */ | |
409 | 0, /* rightshift */ | |
410 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
411 | 16, /* bitsize */ | |
412 | false, /* pc_relative */ | |
413 | 0, /* bitpos */ | |
414 | complain_overflow_bitfield, /* complain_on_overflow */ | |
415 | bfd_elf_generic_reloc, /* special_function */ | |
416 | "R_MIPS_GOT_OFST", /* name */ | |
417 | true, /* partial_inplace */ | |
418 | 0x0000ffff, /* src_mask */ | |
419 | 0x0000ffff, /* dst_mask */ | |
420 | false), /* pcrel_offset */ | |
421 | ||
422 | /* High 16 bits of displacement in global offset table. */ | |
423 | /* FIXME: Not handled correctly. */ | |
424 | HOWTO (R_MIPS_GOT_HI16, /* type */ | |
425 | 0, /* rightshift */ | |
426 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
427 | 16, /* bitsize */ | |
428 | false, /* pc_relative */ | |
429 | 0, /* bitpos */ | |
430 | complain_overflow_dont, /* complain_on_overflow */ | |
431 | bfd_elf_generic_reloc, /* special_function */ | |
432 | "R_MIPS_GOT_HI16", /* name */ | |
433 | true, /* partial_inplace */ | |
434 | 0x0000ffff, /* src_mask */ | |
435 | 0x0000ffff, /* dst_mask */ | |
436 | false), /* pcrel_offset */ | |
437 | ||
438 | /* Low 16 bits of displacement in global offset table. */ | |
439 | /* FIXME: Not handled correctly. */ | |
440 | HOWTO (R_MIPS_GOT_LO16, /* type */ | |
441 | 0, /* rightshift */ | |
442 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
443 | 16, /* bitsize */ | |
444 | false, /* pc_relative */ | |
445 | 0, /* bitpos */ | |
446 | complain_overflow_dont, /* complain_on_overflow */ | |
447 | bfd_elf_generic_reloc, /* special_function */ | |
448 | "R_MIPS_GOT_LO16", /* name */ | |
449 | true, /* partial_inplace */ | |
450 | 0x0000ffff, /* src_mask */ | |
451 | 0x0000ffff, /* dst_mask */ | |
452 | false), /* pcrel_offset */ | |
453 | ||
454 | /* 64 bit subtraction. Presumably not used in 32 bit ELF. */ | |
455 | { R_MIPS_SUB }, | |
456 | ||
457 | /* Used to cause the linker to insert and delete instructions? */ | |
458 | { R_MIPS_INSERT_A }, | |
459 | { R_MIPS_INSERT_B }, | |
460 | { R_MIPS_DELETE }, | |
461 | ||
462 | /* Get the higher values of a 64 bit addend. Presumably not used in | |
463 | 32 bit ELF. */ | |
464 | { R_MIPS_HIGHER }, | |
465 | { R_MIPS_HIGHEST }, | |
466 | ||
467 | /* High 16 bits of displacement in global offset table. */ | |
468 | /* FIXME: Not handled correctly. */ | |
469 | HOWTO (R_MIPS_CALL_HI16, /* type */ | |
470 | 0, /* rightshift */ | |
471 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
472 | 16, /* bitsize */ | |
473 | false, /* pc_relative */ | |
474 | 0, /* bitpos */ | |
475 | complain_overflow_dont, /* complain_on_overflow */ | |
476 | bfd_elf_generic_reloc, /* special_function */ | |
477 | "R_MIPS_CALL_HI16", /* name */ | |
478 | true, /* partial_inplace */ | |
479 | 0x0000ffff, /* src_mask */ | |
480 | 0x0000ffff, /* dst_mask */ | |
481 | false), /* pcrel_offset */ | |
482 | ||
483 | /* Low 16 bits of displacement in global offset table. */ | |
484 | /* FIXME: Not handled correctly. */ | |
485 | HOWTO (R_MIPS_CALL_LO16, /* type */ | |
486 | 0, /* rightshift */ | |
487 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
488 | 16, /* bitsize */ | |
489 | false, /* pc_relative */ | |
490 | 0, /* bitpos */ | |
491 | complain_overflow_dont, /* complain_on_overflow */ | |
492 | bfd_elf_generic_reloc, /* special_function */ | |
493 | "R_MIPS_CALL_LO16", /* name */ | |
494 | true, /* partial_inplace */ | |
495 | 0x0000ffff, /* src_mask */ | |
496 | 0x0000ffff, /* dst_mask */ | |
b3c0fc57 ILT |
497 | false) /* pcrel_offset */ |
498 | }; | |
499 | ||
500 | /* Do a R_MIPS_HI16 relocation. This has to be done in combination | |
501 | with a R_MIPS_LO16 reloc, because there is a carry from the LO16 to | |
502 | the HI16. Here we just save the information we need; we do the | |
503 | actual relocation when we see the LO16. MIPS ELF requires that the | |
504 | LO16 immediately follow the HI16, so this ought to work. */ | |
505 | ||
506 | static bfd_byte *mips_hi16_addr; | |
507 | static bfd_vma mips_hi16_addend; | |
508 | ||
509 | static bfd_reloc_status_type | |
510 | mips_elf_hi16_reloc (abfd, | |
511 | reloc_entry, | |
512 | symbol, | |
513 | data, | |
514 | input_section, | |
6e07e54f ILT |
515 | output_bfd, |
516 | error_message) | |
b3c0fc57 ILT |
517 | bfd *abfd; |
518 | arelent *reloc_entry; | |
519 | asymbol *symbol; | |
520 | PTR data; | |
521 | asection *input_section; | |
522 | bfd *output_bfd; | |
6e07e54f | 523 | char **error_message; |
b3c0fc57 ILT |
524 | { |
525 | bfd_reloc_status_type ret; | |
526 | bfd_vma relocation; | |
527 | ||
b3c0fc57 ILT |
528 | /* If we're relocating, and this an external symbol, we don't want |
529 | to change anything. */ | |
530 | if (output_bfd != (bfd *) NULL | |
531 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
532 | && reloc_entry->addend == 0) | |
533 | { | |
534 | reloc_entry->address += input_section->output_offset; | |
535 | return bfd_reloc_ok; | |
536 | } | |
537 | ||
6e07e54f ILT |
538 | /* FIXME: The symbol _gp_disp requires special handling, which we do |
539 | not do. */ | |
540 | if (strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0) | |
541 | abort (); | |
542 | ||
b3c0fc57 | 543 | ret = bfd_reloc_ok; |
24f13b03 | 544 | if (bfd_is_und_section (symbol->section) |
b3c0fc57 ILT |
545 | && output_bfd == (bfd *) NULL) |
546 | ret = bfd_reloc_undefined; | |
547 | ||
548 | if (bfd_is_com_section (symbol->section)) | |
549 | relocation = 0; | |
550 | else | |
551 | relocation = symbol->value; | |
552 | ||
553 | relocation += symbol->section->output_section->vma; | |
554 | relocation += symbol->section->output_offset; | |
555 | relocation += reloc_entry->addend; | |
556 | ||
557 | if (reloc_entry->address > input_section->_cooked_size) | |
558 | return bfd_reloc_outofrange; | |
559 | ||
560 | /* Save the information, and let LO16 do the actual relocation. */ | |
561 | mips_hi16_addr = (bfd_byte *) data + reloc_entry->address; | |
562 | mips_hi16_addend = relocation; | |
563 | ||
564 | if (output_bfd != (bfd *) NULL) | |
565 | reloc_entry->address += input_section->output_offset; | |
566 | ||
567 | return ret; | |
568 | } | |
569 | ||
570 | /* Do a R_MIPS_LO16 relocation. This is a straightforward 16 bit | |
571 | inplace relocation; this function exists in order to do the | |
572 | R_MIPS_HI16 relocation described above. */ | |
573 | ||
574 | static bfd_reloc_status_type | |
575 | mips_elf_lo16_reloc (abfd, | |
576 | reloc_entry, | |
577 | symbol, | |
578 | data, | |
579 | input_section, | |
6e07e54f ILT |
580 | output_bfd, |
581 | error_message) | |
b3c0fc57 ILT |
582 | bfd *abfd; |
583 | arelent *reloc_entry; | |
584 | asymbol *symbol; | |
585 | PTR data; | |
586 | asection *input_section; | |
587 | bfd *output_bfd; | |
6e07e54f | 588 | char **error_message; |
b3c0fc57 ILT |
589 | { |
590 | /* FIXME: The symbol _gp_disp requires special handling, which we do | |
591 | not do. */ | |
6e07e54f ILT |
592 | if (output_bfd == (bfd *) NULL |
593 | && strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0) | |
b3c0fc57 ILT |
594 | abort (); |
595 | ||
596 | if (mips_hi16_addr != (bfd_byte *) NULL) | |
597 | { | |
598 | unsigned long insn; | |
599 | unsigned long val; | |
600 | unsigned long vallo; | |
601 | ||
602 | /* Do the HI16 relocation. Note that we actually don't need to | |
603 | know anything about the LO16 itself, except where to find the | |
604 | low 16 bits of the addend needed by the LO16. */ | |
605 | insn = bfd_get_32 (abfd, mips_hi16_addr); | |
606 | vallo = (bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address) | |
607 | & 0xffff); | |
608 | val = ((insn & 0xffff) << 16) + vallo; | |
609 | val += mips_hi16_addend; | |
610 | ||
611 | /* The low order 16 bits are always treated as a signed value. | |
612 | Therefore, a negative value in the low order bits requires an | |
613 | adjustment in the high order bits. We need to make this | |
614 | adjustment in two ways: once for the bits we took from the | |
615 | data, and once for the bits we are putting back in to the | |
616 | data. */ | |
617 | if ((vallo & 0x8000) != 0) | |
618 | val -= 0x10000; | |
619 | if ((val & 0x8000) != 0) | |
620 | val += 0x10000; | |
621 | ||
622 | insn = (insn &~ 0xffff) | ((val >> 16) & 0xffff); | |
623 | bfd_put_32 (abfd, insn, mips_hi16_addr); | |
624 | ||
625 | mips_hi16_addr = (bfd_byte *) NULL; | |
626 | } | |
627 | ||
628 | /* Now do the LO16 reloc in the usual way. */ | |
629 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, | |
6e07e54f ILT |
630 | input_section, output_bfd, error_message); |
631 | } | |
632 | ||
633 | /* Do a R_MIPS_GOT16 reloc. This is a reloc against the global offset | |
634 | table used for PIC code. If the symbol is an external symbol, the | |
635 | instruction is modified to contain the offset of the appropriate | |
636 | entry in the global offset table. If the symbol is a section | |
637 | symbol, the next reloc is a R_MIPS_LO16 reloc. The two 16 bit | |
638 | addends are combined to form the real addend against the section | |
639 | symbol; the GOT16 is modified to contain the offset of an entry in | |
640 | the global offset table, and the LO16 is modified to offset it | |
641 | appropriately. Thus an offset larger than 16 bits requires a | |
642 | modified value in the global offset table. | |
643 | ||
644 | This implementation suffices for the assembler, but the linker does | |
645 | not yet know how to create global offset tables. */ | |
646 | ||
647 | static bfd_reloc_status_type | |
648 | mips_elf_got16_reloc (abfd, | |
649 | reloc_entry, | |
650 | symbol, | |
651 | data, | |
652 | input_section, | |
653 | output_bfd, | |
654 | error_message) | |
655 | bfd *abfd; | |
656 | arelent *reloc_entry; | |
657 | asymbol *symbol; | |
658 | PTR data; | |
659 | asection *input_section; | |
660 | bfd *output_bfd; | |
661 | char **error_message; | |
662 | { | |
663 | /* If we're relocating, and this an external symbol, we don't want | |
664 | to change anything. */ | |
665 | if (output_bfd != (bfd *) NULL | |
666 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
667 | && reloc_entry->addend == 0) | |
668 | { | |
669 | reloc_entry->address += input_section->output_offset; | |
670 | return bfd_reloc_ok; | |
671 | } | |
672 | ||
673 | /* If we're relocating, and this is a local symbol, we can handle it | |
674 | just like HI16. */ | |
675 | if (output_bfd != (bfd *) NULL | |
676 | && (symbol->flags & BSF_SECTION_SYM) != 0) | |
677 | return mips_elf_hi16_reloc (abfd, reloc_entry, symbol, data, | |
678 | input_section, output_bfd, error_message); | |
679 | ||
680 | abort (); | |
b3c0fc57 ILT |
681 | } |
682 | ||
683 | /* Do a R_MIPS_GPREL16 relocation. This is a 16 bit value which must | |
684 | become the offset from the gp register. This function also handles | |
685 | R_MIPS_LITERAL relocations, although those can be handled more | |
686 | cleverly because the entries in the .lit8 and .lit4 sections can be | |
687 | merged. */ | |
688 | ||
689 | static bfd_reloc_status_type | |
690 | mips_elf_gprel16_reloc (abfd, | |
691 | reloc_entry, | |
692 | symbol, | |
693 | data, | |
694 | input_section, | |
6e07e54f ILT |
695 | output_bfd, |
696 | error_message) | |
b3c0fc57 ILT |
697 | bfd *abfd; |
698 | arelent *reloc_entry; | |
699 | asymbol *symbol; | |
700 | PTR data; | |
701 | asection *input_section; | |
702 | bfd *output_bfd; | |
6e07e54f | 703 | char **error_message; |
b3c0fc57 ILT |
704 | { |
705 | boolean relocateable; | |
706 | bfd_vma relocation; | |
707 | unsigned long val; | |
708 | unsigned long insn; | |
709 | ||
710 | /* If we're relocating, and this is an external symbol with no | |
711 | addend, we don't want to change anything. We will only have an | |
712 | addend if this is a newly created reloc, not read from an ELF | |
713 | file. */ | |
714 | if (output_bfd != (bfd *) NULL | |
715 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
716 | && reloc_entry->addend == 0) | |
717 | { | |
718 | reloc_entry->address += input_section->output_offset; | |
719 | return bfd_reloc_ok; | |
720 | } | |
721 | ||
722 | if (output_bfd != (bfd *) NULL) | |
723 | relocateable = true; | |
724 | else | |
725 | { | |
726 | relocateable = false; | |
727 | output_bfd = symbol->section->output_section->owner; | |
728 | } | |
729 | ||
24f13b03 | 730 | if (bfd_is_und_section (symbol->section) |
b3c0fc57 ILT |
731 | && relocateable == false) |
732 | return bfd_reloc_undefined; | |
733 | ||
734 | /* We have to figure out the gp value, so that we can adjust the | |
735 | symbol value correctly. We look up the symbol _gp in the output | |
736 | BFD. If we can't find it, we're stuck. We cache it in the ELF | |
737 | target data. We don't need to adjust the symbol value for an | |
738 | external symbol if we are producing relocateable output. */ | |
739 | if (elf_gp (output_bfd) == 0 | |
740 | && (relocateable == false | |
741 | || (symbol->flags & BSF_SECTION_SYM) != 0)) | |
742 | { | |
743 | if (relocateable != false) | |
744 | { | |
745 | /* Make up a value. */ | |
746 | elf_gp (output_bfd) = | |
747 | symbol->section->output_section->vma + 0x4000; | |
748 | } | |
749 | else | |
750 | { | |
751 | unsigned int count; | |
752 | asymbol **sym; | |
753 | unsigned int i; | |
754 | ||
755 | count = bfd_get_symcount (output_bfd); | |
756 | sym = bfd_get_outsymbols (output_bfd); | |
757 | ||
758 | if (sym == (asymbol **) NULL) | |
759 | i = count; | |
760 | else | |
761 | { | |
762 | for (i = 0; i < count; i++, sym++) | |
763 | { | |
764 | register CONST char *name; | |
765 | ||
766 | name = bfd_asymbol_name (*sym); | |
767 | if (*name == '_' && strcmp (name, "_gp") == 0) | |
768 | { | |
769 | elf_gp (output_bfd) = bfd_asymbol_value (*sym); | |
770 | break; | |
771 | } | |
772 | } | |
773 | } | |
774 | ||
775 | if (i >= count) | |
776 | { | |
777 | /* Only get the error once. */ | |
778 | elf_gp (output_bfd) = 4; | |
6e07e54f ILT |
779 | *error_message = |
780 | (char *) "GP relative relocation when _gp not defined"; | |
b3c0fc57 ILT |
781 | return bfd_reloc_dangerous; |
782 | } | |
783 | } | |
784 | } | |
785 | ||
786 | if (bfd_is_com_section (symbol->section)) | |
787 | relocation = 0; | |
788 | else | |
789 | relocation = symbol->value; | |
790 | ||
791 | relocation += symbol->section->output_section->vma; | |
792 | relocation += symbol->section->output_offset; | |
793 | ||
794 | if (reloc_entry->address > input_section->_cooked_size) | |
795 | return bfd_reloc_outofrange; | |
796 | ||
797 | insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); | |
798 | ||
799 | /* Set val to the offset into the section or symbol. */ | |
800 | val = ((insn & 0xffff) + reloc_entry->addend) & 0xffff; | |
801 | if (val & 0x8000) | |
802 | val -= 0x10000; | |
803 | ||
804 | /* Adjust val for the final section location and GP value. If we | |
805 | are producing relocateable output, we don't want to do this for | |
806 | an external symbol. */ | |
807 | if (relocateable == false | |
808 | || (symbol->flags & BSF_SECTION_SYM) != 0) | |
809 | val += relocation - elf_gp (output_bfd); | |
810 | ||
811 | insn = (insn &~ 0xffff) | (val & 0xffff); | |
812 | bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); | |
813 | ||
814 | if (relocateable != false) | |
815 | reloc_entry->address += input_section->output_offset; | |
816 | ||
817 | /* Make sure it fit in 16 bits. */ | |
818 | if (val >= 0x8000 && val < 0xffff8000) | |
6e07e54f | 819 | return bfd_reloc_overflow; |
b3c0fc57 ILT |
820 | |
821 | return bfd_reloc_ok; | |
822 | } | |
6b4b4d17 | 823 | |
b3c0fc57 | 824 | /* A mapping from BFD reloc types to MIPS ELF reloc types. */ |
6b4b4d17 | 825 | |
b3c0fc57 ILT |
826 | struct elf_reloc_map { |
827 | bfd_reloc_code_real_type bfd_reloc_val; | |
828 | enum reloc_type elf_reloc_val; | |
829 | }; | |
830 | ||
831 | static CONST struct elf_reloc_map mips_reloc_map[] = | |
832 | { | |
833 | { BFD_RELOC_NONE, R_MIPS_NONE, }, | |
834 | { BFD_RELOC_16, R_MIPS_16 }, | |
835 | { BFD_RELOC_32, R_MIPS_32 }, | |
836 | { BFD_RELOC_CTOR, R_MIPS_32 }, | |
837 | { BFD_RELOC_32_PCREL, R_MIPS_REL32 }, | |
838 | { BFD_RELOC_MIPS_JMP, R_MIPS_26 }, | |
839 | { BFD_RELOC_HI16_S, R_MIPS_HI16 }, | |
840 | { BFD_RELOC_LO16, R_MIPS_LO16 }, | |
841 | { BFD_RELOC_MIPS_GPREL, R_MIPS_GPREL16 }, | |
842 | { BFD_RELOC_MIPS_LITERAL, R_MIPS_LITERAL }, | |
843 | { BFD_RELOC_MIPS_GOT16, R_MIPS_GOT16 }, | |
844 | { BFD_RELOC_16_PCREL, R_MIPS_PC16 }, | |
845 | { BFD_RELOC_MIPS_CALL16, R_MIPS_CALL16 }, | |
846 | { BFD_RELOC_MIPS_GPREL32, R_MIPS_GPREL32 } | |
847 | }; | |
848 | ||
849 | /* Given a BFD reloc type, return a howto structure. */ | |
850 | ||
16fe8950 | 851 | static reloc_howto_type * |
b3c0fc57 ILT |
852 | bfd_elf32_bfd_reloc_type_lookup (abfd, code) |
853 | bfd *abfd; | |
854 | bfd_reloc_code_real_type code; | |
855 | { | |
856 | int i; | |
857 | ||
858 | for (i = 0; i < sizeof (mips_reloc_map) / sizeof (struct elf_reloc_map); i++) | |
859 | { | |
860 | if (mips_reloc_map[i].bfd_reloc_val == code) | |
861 | return &elf_mips_howto_table[(int) mips_reloc_map[i].elf_reloc_val]; | |
862 | } | |
863 | return NULL; | |
864 | } | |
865 | ||
866 | /* Given a MIPS reloc type, fill in an arelent structure. */ | |
867 | ||
868 | static void | |
869 | mips_info_to_howto_rel (abfd, cache_ptr, dst) | |
870 | bfd *abfd; | |
871 | arelent *cache_ptr; | |
872 | Elf32_Internal_Rel *dst; | |
873 | { | |
874 | unsigned int r_type; | |
875 | ||
876 | r_type = ELF32_R_TYPE (dst->r_info); | |
877 | BFD_ASSERT (r_type < (unsigned int) R_MIPS_max); | |
878 | cache_ptr->howto = &elf_mips_howto_table[r_type]; | |
879 | ||
880 | /* The addend for a GPREL16 or LITERAL relocation comes from the GP | |
881 | value for the object file. We get the addend now, rather than | |
882 | when we do the relocation, because the symbol manipulations done | |
883 | by the linker may cause us to lose track of the input BFD. */ | |
884 | if (((*cache_ptr->sym_ptr_ptr)->flags & BSF_SECTION_SYM) != 0 | |
885 | && (r_type == (unsigned int) R_MIPS_GPREL16 | |
886 | || r_type == (unsigned int) R_MIPS_LITERAL)) | |
887 | cache_ptr->addend = elf_gp (abfd); | |
888 | } | |
889 | \f | |
890 | /* A .reginfo section holds a single Elf32_RegInfo structure. These | |
891 | routines swap this structure in and out. They are used outside of | |
892 | BFD, so they are globally visible. */ | |
893 | ||
894 | void | |
895 | bfd_mips_elf32_swap_reginfo_in (abfd, ex, in) | |
896 | bfd *abfd; | |
897 | const Elf32_External_RegInfo *ex; | |
898 | Elf32_RegInfo *in; | |
899 | { | |
900 | in->ri_gprmask = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_gprmask); | |
901 | in->ri_cprmask[0] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[0]); | |
902 | in->ri_cprmask[1] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[1]); | |
903 | in->ri_cprmask[2] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[2]); | |
904 | in->ri_cprmask[3] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[3]); | |
905 | in->ri_gp_value = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_gp_value); | |
906 | } | |
907 | ||
908 | void | |
909 | bfd_mips_elf32_swap_reginfo_out (abfd, in, ex) | |
910 | bfd *abfd; | |
911 | const Elf32_RegInfo *in; | |
912 | Elf32_External_RegInfo *ex; | |
913 | { | |
914 | bfd_h_put_32 (abfd, (bfd_vma) in->ri_gprmask, | |
915 | (bfd_byte *) ex->ri_gprmask); | |
916 | bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[0], | |
917 | (bfd_byte *) ex->ri_cprmask[0]); | |
918 | bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[1], | |
919 | (bfd_byte *) ex->ri_cprmask[1]); | |
920 | bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[2], | |
921 | (bfd_byte *) ex->ri_cprmask[2]); | |
922 | bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[3], | |
923 | (bfd_byte *) ex->ri_cprmask[3]); | |
924 | bfd_h_put_32 (abfd, (bfd_vma) in->ri_gp_value, | |
925 | (bfd_byte *) ex->ri_gp_value); | |
926 | } | |
aac6b32f ILT |
927 | |
928 | /* Swap an entry in a .gptab section. Note that these routines rely | |
929 | on the equivalence of the two elements of the union. */ | |
930 | ||
931 | static void | |
932 | bfd_mips_elf32_swap_gptab_in (abfd, ex, in) | |
933 | bfd *abfd; | |
934 | const Elf32_External_gptab *ex; | |
935 | Elf32_gptab *in; | |
936 | { | |
937 | in->gt_entry.gt_g_value = bfd_h_get_32 (abfd, ex->gt_entry.gt_g_value); | |
938 | in->gt_entry.gt_bytes = bfd_h_get_32 (abfd, ex->gt_entry.gt_bytes); | |
939 | } | |
940 | ||
941 | static void | |
942 | bfd_mips_elf32_swap_gptab_out (abfd, in, ex) | |
943 | bfd *abfd; | |
944 | const Elf32_gptab *in; | |
945 | Elf32_External_gptab *ex; | |
946 | { | |
947 | bfd_h_put_32 (abfd, (bfd_vma) in->gt_entry.gt_g_value, | |
948 | ex->gt_entry.gt_g_value); | |
949 | bfd_h_put_32 (abfd, (bfd_vma) in->gt_entry.gt_bytes, | |
950 | ex->gt_entry.gt_bytes); | |
951 | } | |
b3c0fc57 | 952 | \f |
6e07e54f ILT |
953 | /* Determine whether a symbol is global for the purposes of splitting |
954 | the symbol table into global symbols and local symbols. At least | |
955 | on Irix 5, this split must be between section symbols and all other | |
956 | symbols. On most ELF targets the split is between static symbols | |
957 | and externally visible symbols. */ | |
958 | ||
959 | /*ARGSUSED*/ | |
960 | static boolean | |
961 | mips_elf_sym_is_global (abfd, sym) | |
962 | bfd *abfd; | |
963 | asymbol *sym; | |
964 | { | |
965 | return (sym->flags & BSF_SECTION_SYM) == 0 ? true : false; | |
966 | } | |
967 | \f | |
968 | /* Set the right machine number for a MIPS ELF file. */ | |
969 | ||
970 | static boolean | |
971 | mips_elf_object_p (abfd) | |
972 | bfd *abfd; | |
973 | { | |
974 | switch (elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH) | |
975 | { | |
976 | default: | |
977 | case E_MIPS_ARCH_1: | |
978 | /* Just use the default, which was set in elfcode.h. */ | |
979 | break; | |
980 | ||
981 | case E_MIPS_ARCH_2: | |
982 | (void) bfd_default_set_arch_mach (abfd, bfd_arch_mips, 6000); | |
983 | break; | |
984 | ||
985 | case E_MIPS_ARCH_3: | |
986 | (void) bfd_default_set_arch_mach (abfd, bfd_arch_mips, 4000); | |
987 | break; | |
988 | } | |
989 | ||
aac6b32f ILT |
990 | /* Irix 5 is broken. Object file symbol tables are not always |
991 | sorted correctly such that local symbols precede global symbols, | |
992 | and the sh_info field in the symbol table is not always right. | |
993 | We try to quickly check whether the symbol table is broken for | |
994 | this BFD, and, if it is, we set elf_bad_symtab in tdata. */ | |
995 | if (elf_onesymtab (abfd) != 0) | |
996 | { | |
997 | Elf_Internal_Shdr *symtab_hdr; | |
998 | Elf32_External_Sym esym; | |
999 | ||
1000 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1001 | if (bfd_seek (abfd, | |
1002 | (symtab_hdr->sh_offset | |
1003 | + symtab_hdr->sh_size | |
1004 | - sizeof (Elf32_External_Sym)), | |
1005 | SEEK_SET) != 0 | |
1006 | || (bfd_read ((PTR) &esym, 1, sizeof (Elf32_External_Sym), abfd) | |
1007 | != sizeof (Elf32_External_Sym))) | |
1008 | return false; | |
1009 | if (ELF_ST_BIND (bfd_h_get_8 (abfd, (bfd_byte *) esym.st_info)) | |
1010 | == STB_LOCAL) | |
1011 | elf_bad_symtab (abfd) = true; | |
1012 | } | |
1013 | ||
6e07e54f ILT |
1014 | return true; |
1015 | } | |
1016 | ||
1017 | /* The final processing done just before writing out a MIPS ELF object | |
1018 | file. This gets the MIPS architecture right based on the machine | |
1019 | number. */ | |
1020 | ||
24f13b03 | 1021 | /*ARGSUSED*/ |
6e07e54f | 1022 | static void |
24f13b03 | 1023 | mips_elf_final_write_processing (abfd, linker) |
6e07e54f | 1024 | bfd *abfd; |
24f13b03 | 1025 | boolean linker; |
6e07e54f ILT |
1026 | { |
1027 | unsigned long val; | |
aac6b32f ILT |
1028 | unsigned int i; |
1029 | Elf_Internal_Shdr **hdrpp; | |
6e07e54f ILT |
1030 | |
1031 | switch (bfd_get_mach (abfd)) | |
1032 | { | |
1033 | case 3000: | |
1034 | val = E_MIPS_ARCH_1; | |
1035 | break; | |
1036 | ||
1037 | case 6000: | |
1038 | val = E_MIPS_ARCH_2; | |
1039 | break; | |
1040 | ||
1041 | case 4000: | |
1042 | val = E_MIPS_ARCH_3; | |
1043 | break; | |
1044 | ||
1045 | default: | |
1046 | return; | |
1047 | } | |
1048 | ||
1049 | elf_elfheader (abfd)->e_flags &=~ EF_MIPS_ARCH; | |
1050 | elf_elfheader (abfd)->e_flags |= val; | |
aac6b32f ILT |
1051 | |
1052 | /* Set the sh_info field for .gptab sections. */ | |
1053 | for (i = 1, hdrpp = elf_elfsections (abfd) + 1; | |
1054 | i < elf_elfheader (abfd)->e_shnum; | |
1055 | i++, hdrpp++) | |
1056 | { | |
1057 | if ((*hdrpp)->sh_type == SHT_MIPS_GPTAB) | |
1058 | { | |
1059 | const char *name; | |
1060 | asection *sec; | |
1061 | ||
24f13b03 ILT |
1062 | BFD_ASSERT ((*hdrpp)->bfd_section != NULL); |
1063 | name = bfd_get_section_name (abfd, (*hdrpp)->bfd_section); | |
aac6b32f ILT |
1064 | BFD_ASSERT (name != NULL |
1065 | && strncmp (name, ".gptab.", sizeof ".gptab." - 1) == 0); | |
1066 | sec = bfd_get_section_by_name (abfd, name + sizeof ".gptab" - 1); | |
1067 | BFD_ASSERT (sec != NULL); | |
1068 | (*hdrpp)->sh_info = elf_section_data (sec)->this_idx; | |
1069 | } | |
1070 | } | |
6e07e54f ILT |
1071 | } |
1072 | \f | |
b3c0fc57 ILT |
1073 | /* Handle a MIPS specific section when reading an object file. This |
1074 | is called when elfcode.h finds a section with an unknown type. | |
1075 | FIXME: We need to handle the SHF_MIPS_GPREL flag, but I'm not sure | |
1076 | how to. */ | |
1077 | ||
1078 | static boolean | |
1079 | mips_elf_section_from_shdr (abfd, hdr, name) | |
1080 | bfd *abfd; | |
1081 | Elf32_Internal_Shdr *hdr; | |
1082 | char *name; | |
1083 | { | |
497c5434 ILT |
1084 | asection *newsect; |
1085 | ||
b3c0fc57 ILT |
1086 | /* There ought to be a place to keep ELF backend specific flags, but |
1087 | at the moment there isn't one. We just keep track of the | |
1088 | sections by their name, instead. Fortunately, the ABI gives | |
1089 | suggested names for all the MIPS specific sections, so we will | |
1090 | probably get away with this. */ | |
1091 | switch (hdr->sh_type) | |
1092 | { | |
1093 | case SHT_MIPS_LIBLIST: | |
1094 | if (strcmp (name, ".liblist") != 0) | |
1095 | return false; | |
1096 | break; | |
6a5848cd ILT |
1097 | case SHT_MIPS_MSYM: |
1098 | if (strcmp (name, ".msym") != 0) | |
1099 | return false; | |
1100 | break; | |
b3c0fc57 ILT |
1101 | case SHT_MIPS_CONFLICT: |
1102 | if (strcmp (name, ".conflict") != 0) | |
1103 | return false; | |
1104 | break; | |
1105 | case SHT_MIPS_GPTAB: | |
1106 | if (strncmp (name, ".gptab.", sizeof ".gptab." - 1) != 0) | |
1107 | return false; | |
1108 | break; | |
1109 | case SHT_MIPS_UCODE: | |
1110 | if (strcmp (name, ".ucode") != 0) | |
1111 | return false; | |
1112 | break; | |
1113 | case SHT_MIPS_DEBUG: | |
1114 | if (strcmp (name, ".mdebug") != 0) | |
1115 | return false; | |
1116 | break; | |
1117 | case SHT_MIPS_REGINFO: | |
1118 | if (strcmp (name, ".reginfo") != 0 | |
1119 | || hdr->sh_size != sizeof (Elf32_External_RegInfo)) | |
1120 | return false; | |
1121 | break; | |
6e07e54f ILT |
1122 | case SHT_MIPS_OPTIONS: |
1123 | if (strcmp (name, ".options") != 0) | |
1124 | return false; | |
1125 | break; | |
6a5848cd ILT |
1126 | case SHT_MIPS_DWARF: |
1127 | if (strncmp (name, ".debug_", sizeof ".debug_" - 1) != 0) | |
1128 | return false; | |
1129 | break; | |
1130 | case SHT_MIPS_EVENTS: | |
1131 | if (strncmp (name, ".MIPS.events.", sizeof ".MIPS.events." - 1) != 0) | |
1132 | return false; | |
1133 | break; | |
b3c0fc57 ILT |
1134 | default: |
1135 | return false; | |
1136 | } | |
1137 | ||
497c5434 ILT |
1138 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name)) |
1139 | return false; | |
24f13b03 | 1140 | newsect = hdr->bfd_section; |
b3c0fc57 | 1141 | |
497c5434 ILT |
1142 | if (hdr->sh_type == SHT_MIPS_DEBUG) |
1143 | { | |
1144 | if (! bfd_set_section_flags (abfd, newsect, | |
1145 | (bfd_get_section_flags (abfd, newsect) | |
1146 | | SEC_DEBUGGING))) | |
1147 | return false; | |
1148 | } | |
b3c0fc57 | 1149 | |
497c5434 | 1150 | /* FIXME: We should record sh_info for a .gptab section. */ |
b3c0fc57 | 1151 | |
497c5434 ILT |
1152 | /* For a .reginfo section, set the gp value in the tdata information |
1153 | from the contents of this section. We need the gp value while | |
1154 | processing relocs, so we just get it now. */ | |
1155 | if (hdr->sh_type == SHT_MIPS_REGINFO) | |
1156 | { | |
1157 | Elf32_External_RegInfo ext; | |
1158 | Elf32_RegInfo s; | |
b3c0fc57 | 1159 | |
497c5434 ILT |
1160 | if (! bfd_get_section_contents (abfd, newsect, (PTR) &ext, |
1161 | (file_ptr) 0, sizeof ext)) | |
1162 | return false; | |
1163 | bfd_mips_elf32_swap_reginfo_in (abfd, &ext, &s); | |
1164 | elf_gp (abfd) = s.ri_gp_value; | |
b3c0fc57 ILT |
1165 | } |
1166 | ||
1167 | return true; | |
1168 | } | |
1169 | ||
1170 | /* Set the correct type for a MIPS ELF section. We do this by the | |
1171 | section name, which is a hack, but ought to work. */ | |
1172 | ||
1173 | static boolean | |
1174 | mips_elf_fake_sections (abfd, hdr, sec) | |
1175 | bfd *abfd; | |
1176 | Elf32_Internal_Shdr *hdr; | |
1177 | asection *sec; | |
1178 | { | |
1179 | register const char *name; | |
1180 | ||
1181 | name = bfd_get_section_name (abfd, sec); | |
1182 | ||
1183 | if (strcmp (name, ".liblist") == 0) | |
1184 | { | |
1185 | hdr->sh_type = SHT_MIPS_LIBLIST; | |
1186 | hdr->sh_info = sec->_raw_size / sizeof (Elf32_Lib); | |
1187 | /* FIXME: Set the sh_link field. */ | |
1188 | } | |
6a5848cd ILT |
1189 | else if (strcmp (name, ".msym") == 0) |
1190 | { | |
1191 | hdr->sh_type = SHT_MIPS_MSYM; | |
1192 | hdr->sh_entsize = 8; | |
1193 | /* FIXME: Set the sh_info field. */ | |
1194 | } | |
b3c0fc57 ILT |
1195 | else if (strcmp (name, ".conflict") == 0) |
1196 | hdr->sh_type = SHT_MIPS_CONFLICT; | |
1197 | else if (strncmp (name, ".gptab.", sizeof ".gptab." - 1) == 0) | |
1198 | { | |
1199 | hdr->sh_type = SHT_MIPS_GPTAB; | |
aac6b32f ILT |
1200 | hdr->sh_entsize = sizeof (Elf32_External_gptab); |
1201 | /* The sh_info field is set in mips_elf_final_write_processing. */ | |
b3c0fc57 ILT |
1202 | } |
1203 | else if (strcmp (name, ".ucode") == 0) | |
1204 | hdr->sh_type = SHT_MIPS_UCODE; | |
1205 | else if (strcmp (name, ".mdebug") == 0) | |
6e07e54f ILT |
1206 | { |
1207 | hdr->sh_type = SHT_MIPS_DEBUG; | |
1208 | hdr->sh_entsize = 1; | |
1209 | } | |
b3c0fc57 ILT |
1210 | else if (strcmp (name, ".reginfo") == 0) |
1211 | { | |
1212 | hdr->sh_type = SHT_MIPS_REGINFO; | |
6e07e54f | 1213 | hdr->sh_entsize = 1; |
b3c0fc57 ILT |
1214 | |
1215 | /* Force the section size to the correct value, even if the | |
1216 | linker thinks it is larger. The link routine below will only | |
1217 | write out this much data for .reginfo. */ | |
1218 | hdr->sh_size = sec->_raw_size = sizeof (Elf32_External_RegInfo); | |
1219 | } | |
6e07e54f ILT |
1220 | else if (strcmp (name, ".options") == 0) |
1221 | { | |
1222 | hdr->sh_type = SHT_MIPS_OPTIONS; | |
1223 | hdr->sh_entsize = 1; | |
1224 | } | |
6a5848cd ILT |
1225 | else if (strncmp (name, ".debug_", sizeof ".debug_" - 1) == 0) |
1226 | hdr->sh_type = SHT_MIPS_DWARF; | |
1227 | else if (strncmp (name, ".MIPS.events.", sizeof ".MIPS.events." - 1) == 0) | |
1228 | hdr->sh_type = SHT_MIPS_EVENTS; | |
b3c0fc57 ILT |
1229 | |
1230 | return true; | |
1231 | } | |
1232 | ||
1233 | /* Given a BFD section, try to locate the corresponding ELF section | |
1234 | index. */ | |
1235 | ||
1236 | static boolean | |
1237 | mips_elf_section_from_bfd_section (abfd, hdr, sec, retval) | |
1238 | bfd *abfd; | |
1239 | Elf32_Internal_Shdr *hdr; | |
1240 | asection *sec; | |
1241 | int *retval; | |
1242 | { | |
1243 | if (strcmp (bfd_get_section_name (abfd, sec), ".scommon") == 0) | |
1244 | { | |
1245 | *retval = SHN_MIPS_SCOMMON; | |
1246 | return true; | |
1247 | } | |
82b1edf7 KR |
1248 | if (strcmp (bfd_get_section_name (abfd, sec), ".acommon") == 0) |
1249 | { | |
1250 | *retval = SHN_MIPS_ACOMMON; | |
1251 | return true; | |
1252 | } | |
b3c0fc57 ILT |
1253 | return false; |
1254 | } | |
1255 | ||
1256 | /* Work over a section just before writing it out. We update the GP | |
1257 | value in the .reginfo section based on the value we are using. | |
1258 | FIXME: We recognize sections that need the SHF_MIPS_GPREL flag by | |
1259 | name; there has to be a better way. */ | |
1260 | ||
1261 | static boolean | |
1262 | mips_elf_section_processing (abfd, hdr) | |
1263 | bfd *abfd; | |
1264 | Elf32_Internal_Shdr *hdr; | |
1265 | { | |
1266 | if (hdr->sh_type == SHT_MIPS_REGINFO) | |
1267 | { | |
1268 | bfd_byte buf[4]; | |
1269 | ||
1270 | BFD_ASSERT (hdr->sh_size == sizeof (Elf32_External_RegInfo)); | |
1271 | BFD_ASSERT (hdr->contents == NULL); | |
1272 | ||
1273 | if (bfd_seek (abfd, | |
1274 | hdr->sh_offset + sizeof (Elf32_External_RegInfo) - 4, | |
1275 | SEEK_SET) == -1) | |
1276 | return false; | |
1277 | bfd_h_put_32 (abfd, (bfd_vma) elf_gp (abfd), buf); | |
1278 | if (bfd_write (buf, (bfd_size_type) 1, (bfd_size_type) 4, abfd) != 4) | |
1279 | return false; | |
1280 | } | |
1281 | ||
24f13b03 | 1282 | if (hdr->bfd_section != NULL) |
b3c0fc57 | 1283 | { |
24f13b03 | 1284 | const char *name = bfd_get_section_name (abfd, hdr->bfd_section); |
b3c0fc57 ILT |
1285 | |
1286 | if (strcmp (name, ".sdata") == 0) | |
1287 | { | |
1288 | hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL; | |
1289 | hdr->sh_type = SHT_PROGBITS; | |
1290 | } | |
1291 | else if (strcmp (name, ".sbss") == 0) | |
1292 | { | |
1293 | hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL; | |
1294 | hdr->sh_type = SHT_NOBITS; | |
1295 | } | |
1296 | else if (strcmp (name, ".lit8") == 0 | |
1297 | || strcmp (name, ".lit4") == 0) | |
1298 | { | |
1299 | hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL; | |
1300 | hdr->sh_type = SHT_PROGBITS; | |
1301 | } | |
1302 | } | |
1303 | ||
1304 | return true; | |
1305 | } | |
1306 | \f | |
aac6b32f ILT |
1307 | /* MIPS ELF uses two common sections. One is the usual one, and the |
1308 | other is for small objects. All the small objects are kept | |
1309 | together, and then referenced via the gp pointer, which yields | |
1310 | faster assembler code. This is what we use for the small common | |
1311 | section. This approach is copied from ecoff.c. */ | |
1312 | static asection mips_elf_scom_section; | |
1313 | static asymbol mips_elf_scom_symbol; | |
1314 | static asymbol *mips_elf_scom_symbol_ptr; | |
1315 | ||
1316 | /* MIPS ELF also uses an acommon section, which represents an | |
1317 | allocated common symbol which may be overridden by a | |
1318 | definition in a shared library. */ | |
1319 | static asection mips_elf_acom_section; | |
1320 | static asymbol mips_elf_acom_symbol; | |
1321 | static asymbol *mips_elf_acom_symbol_ptr; | |
1322 | ||
1323 | /* Handle the special MIPS section numbers that a symbol may use. */ | |
1324 | ||
1325 | static void | |
1326 | mips_elf_symbol_processing (abfd, asym) | |
1327 | bfd *abfd; | |
1328 | asymbol *asym; | |
1329 | { | |
1330 | elf_symbol_type *elfsym; | |
1331 | ||
1332 | elfsym = (elf_symbol_type *) asym; | |
1333 | switch (elfsym->internal_elf_sym.st_shndx) | |
1334 | { | |
1335 | case SHN_MIPS_ACOMMON: | |
1336 | /* This section is used in a dynamically linked executable file. | |
1337 | It is an allocated common section. The dynamic linker can | |
1338 | either resolve these symbols to something in a shared | |
1339 | library, or it can just leave them here. For our purposes, | |
1340 | we can consider these symbols to be in a new section. */ | |
1341 | if (mips_elf_acom_section.name == NULL) | |
1342 | { | |
1343 | /* Initialize the acommon section. */ | |
1344 | mips_elf_acom_section.name = ".acommon"; | |
1345 | mips_elf_acom_section.flags = SEC_NO_FLAGS; | |
1346 | mips_elf_acom_section.output_section = &mips_elf_acom_section; | |
1347 | mips_elf_acom_section.symbol = &mips_elf_acom_symbol; | |
1348 | mips_elf_acom_section.symbol_ptr_ptr = &mips_elf_acom_symbol_ptr; | |
1349 | mips_elf_acom_symbol.name = ".acommon"; | |
1350 | mips_elf_acom_symbol.flags = BSF_SECTION_SYM; | |
1351 | mips_elf_acom_symbol.section = &mips_elf_acom_section; | |
1352 | mips_elf_acom_symbol_ptr = &mips_elf_acom_symbol; | |
1353 | } | |
1354 | asym->section = &mips_elf_acom_section; | |
1355 | break; | |
1356 | ||
1357 | case SHN_COMMON: | |
1358 | /* Common symbols less than the GP size are automatically | |
1359 | treated as SHN_MIPS_SCOMMON symbols. */ | |
1360 | if (asym->value > elf_gp_size (abfd)) | |
1361 | break; | |
1362 | /* Fall through. */ | |
1363 | case SHN_MIPS_SCOMMON: | |
1364 | if (mips_elf_scom_section.name == NULL) | |
1365 | { | |
1366 | /* Initialize the small common section. */ | |
1367 | mips_elf_scom_section.name = ".scommon"; | |
1368 | mips_elf_scom_section.flags = SEC_IS_COMMON; | |
1369 | mips_elf_scom_section.output_section = &mips_elf_scom_section; | |
1370 | mips_elf_scom_section.symbol = &mips_elf_scom_symbol; | |
1371 | mips_elf_scom_section.symbol_ptr_ptr = &mips_elf_scom_symbol_ptr; | |
1372 | mips_elf_scom_symbol.name = ".scommon"; | |
1373 | mips_elf_scom_symbol.flags = BSF_SECTION_SYM; | |
1374 | mips_elf_scom_symbol.section = &mips_elf_scom_section; | |
1375 | mips_elf_scom_symbol_ptr = &mips_elf_scom_symbol; | |
1376 | } | |
1377 | asym->section = &mips_elf_scom_section; | |
1378 | asym->value = elfsym->internal_elf_sym.st_size; | |
1379 | break; | |
1380 | ||
1381 | case SHN_MIPS_SUNDEFINED: | |
24f13b03 | 1382 | asym->section = bfd_und_section_ptr; |
aac6b32f ILT |
1383 | break; |
1384 | } | |
1385 | } | |
1386 | \f | |
6e07e54f ILT |
1387 | /* Read ECOFF debugging information from a .mdebug section into a |
1388 | ecoff_debug_info structure. */ | |
b3c0fc57 ILT |
1389 | |
1390 | static boolean | |
6e07e54f | 1391 | mips_elf_read_ecoff_info (abfd, section, debug) |
b3c0fc57 | 1392 | bfd *abfd; |
6e07e54f ILT |
1393 | asection *section; |
1394 | struct ecoff_debug_info *debug; | |
b3c0fc57 | 1395 | { |
6e07e54f ILT |
1396 | HDRR *symhdr; |
1397 | const struct ecoff_debug_swap *swap; | |
a3a33af3 | 1398 | char *ext_hdr = NULL; |
6e07e54f ILT |
1399 | |
1400 | swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; | |
1401 | ||
a3a33af3 ILT |
1402 | ext_hdr = (char *) malloc (swap->external_hdr_size); |
1403 | if (ext_hdr == NULL && swap->external_hdr_size != 0) | |
1404 | { | |
1405 | bfd_set_error (bfd_error_no_memory); | |
1406 | goto error_return; | |
1407 | } | |
6e07e54f ILT |
1408 | |
1409 | if (bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0, | |
1410 | swap->external_hdr_size) | |
1411 | == false) | |
a3a33af3 | 1412 | goto error_return; |
6e07e54f ILT |
1413 | |
1414 | symhdr = &debug->symbolic_header; | |
1415 | (*swap->swap_hdr_in) (abfd, ext_hdr, symhdr); | |
1416 | ||
1417 | /* The symbolic header contains absolute file offsets and sizes to | |
1418 | read. */ | |
1419 | #define READ(ptr, offset, count, size, type) \ | |
1420 | if (symhdr->count == 0) \ | |
1421 | debug->ptr = NULL; \ | |
1422 | else \ | |
1423 | { \ | |
1424 | debug->ptr = (type) malloc (size * symhdr->count); \ | |
1425 | if (debug->ptr == NULL) \ | |
1426 | { \ | |
a3a33af3 ILT |
1427 | bfd_set_error (bfd_error_no_memory); \ |
1428 | goto error_return; \ | |
6e07e54f ILT |
1429 | } \ |
1430 | if (bfd_seek (abfd, (file_ptr) symhdr->offset, SEEK_SET) != 0 \ | |
1431 | || (bfd_read (debug->ptr, size, symhdr->count, \ | |
1432 | abfd) != size * symhdr->count)) \ | |
a3a33af3 | 1433 | goto error_return; \ |
6e07e54f ILT |
1434 | } |
1435 | ||
1436 | READ (line, cbLineOffset, cbLine, sizeof (unsigned char), unsigned char *); | |
1437 | READ (external_dnr, cbDnOffset, idnMax, swap->external_dnr_size, PTR); | |
1438 | READ (external_pdr, cbPdOffset, ipdMax, swap->external_pdr_size, PTR); | |
1439 | READ (external_sym, cbSymOffset, isymMax, swap->external_sym_size, PTR); | |
1440 | READ (external_opt, cbOptOffset, ioptMax, swap->external_opt_size, PTR); | |
1441 | READ (external_aux, cbAuxOffset, iauxMax, sizeof (union aux_ext), | |
1442 | union aux_ext *); | |
1443 | READ (ss, cbSsOffset, issMax, sizeof (char), char *); | |
1444 | READ (ssext, cbSsExtOffset, issExtMax, sizeof (char), char *); | |
1445 | READ (external_fdr, cbFdOffset, ifdMax, swap->external_fdr_size, PTR); | |
1446 | READ (external_rfd, cbRfdOffset, crfd, swap->external_rfd_size, PTR); | |
aac6b32f ILT |
1447 | READ (external_ext, cbExtOffset, iextMax, swap->external_ext_size, PTR); |
1448 | #undef READ | |
9783e04a DM |
1449 | |
1450 | debug->fdr = NULL; | |
a3a33af3 | 1451 | debug->adjust = NULL; |
6e07e54f ILT |
1452 | |
1453 | return true; | |
a3a33af3 ILT |
1454 | |
1455 | error_return: | |
1456 | if (ext_hdr != NULL) | |
1457 | free (ext_hdr); | |
a3a33af3 ILT |
1458 | if (debug->line != NULL) |
1459 | free (debug->line); | |
1460 | if (debug->external_dnr != NULL) | |
1461 | free (debug->external_dnr); | |
1462 | if (debug->external_pdr != NULL) | |
1463 | free (debug->external_pdr); | |
1464 | if (debug->external_sym != NULL) | |
1465 | free (debug->external_sym); | |
1466 | if (debug->external_opt != NULL) | |
1467 | free (debug->external_opt); | |
1468 | if (debug->external_aux != NULL) | |
1469 | free (debug->external_aux); | |
1470 | if (debug->ss != NULL) | |
1471 | free (debug->ss); | |
1472 | if (debug->ssext != NULL) | |
1473 | free (debug->ssext); | |
1474 | if (debug->external_fdr != NULL) | |
1475 | free (debug->external_fdr); | |
1476 | if (debug->external_rfd != NULL) | |
1477 | free (debug->external_rfd); | |
aac6b32f ILT |
1478 | if (debug->external_ext != NULL) |
1479 | free (debug->external_ext); | |
a3a33af3 | 1480 | return false; |
6e07e54f ILT |
1481 | } |
1482 | ||
aac6b32f ILT |
1483 | /* The MIPS ELF linker needs additional information for each symbol in |
1484 | the global hash table. */ | |
1485 | ||
1486 | struct mips_elf_link_hash_entry | |
1487 | { | |
1488 | struct elf_link_hash_entry root; | |
6e07e54f | 1489 | |
aac6b32f ILT |
1490 | /* External symbol information. */ |
1491 | EXTR esym; | |
1492 | }; | |
1493 | ||
1494 | /* MIPS ELF linker hash table. */ | |
1495 | ||
1496 | struct mips_elf_link_hash_table | |
1497 | { | |
1498 | struct elf_link_hash_table root; | |
1499 | }; | |
1500 | ||
1501 | /* Look up an entry in a MIPS ELF linker hash table. */ | |
1502 | ||
1503 | #define mips_elf_link_hash_lookup(table, string, create, copy, follow) \ | |
1504 | ((struct mips_elf_link_hash_entry *) \ | |
1505 | elf_link_hash_lookup (&(table)->root, (string), (create), \ | |
1506 | (copy), (follow))) | |
1507 | ||
1508 | /* Traverse a MIPS ELF linker hash table. */ | |
1509 | ||
1510 | #define mips_elf_link_hash_traverse(table, func, info) \ | |
1511 | (elf_link_hash_traverse \ | |
1512 | (&(table)->root, \ | |
1513 | (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \ | |
1514 | (info))) | |
1515 | ||
1516 | /* Get the MIPS ELF linker hash table from a link_info structure. */ | |
1517 | ||
1518 | #define mips_elf_hash_table(p) \ | |
1519 | ((struct mips_elf_link_hash_table *) ((p)->hash)) | |
1520 | ||
1521 | static boolean mips_elf_output_extsym | |
1522 | PARAMS ((struct mips_elf_link_hash_entry *, PTR)); | |
1523 | ||
1524 | /* Create an entry in a MIPS ELF linker hash table. */ | |
1525 | ||
1526 | static struct bfd_hash_entry * | |
1527 | mips_elf_link_hash_newfunc (entry, table, string) | |
1528 | struct bfd_hash_entry *entry; | |
1529 | struct bfd_hash_table *table; | |
1530 | const char *string; | |
1531 | { | |
1532 | struct mips_elf_link_hash_entry *ret = | |
1533 | (struct mips_elf_link_hash_entry *) entry; | |
1534 | ||
1535 | /* Allocate the structure if it has not already been allocated by a | |
1536 | subclass. */ | |
1537 | if (ret == (struct mips_elf_link_hash_entry *) NULL) | |
1538 | ret = ((struct mips_elf_link_hash_entry *) | |
1539 | bfd_hash_allocate (table, | |
1540 | sizeof (struct mips_elf_link_hash_entry))); | |
1541 | if (ret == (struct mips_elf_link_hash_entry *) NULL) | |
1542 | { | |
1543 | bfd_set_error (bfd_error_no_memory); | |
1544 | return (struct bfd_hash_entry *) ret; | |
1545 | } | |
1546 | ||
1547 | /* Call the allocation method of the superclass. */ | |
1548 | ret = ((struct mips_elf_link_hash_entry *) | |
1549 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, | |
1550 | table, string)); | |
1551 | if (ret != (struct mips_elf_link_hash_entry *) NULL) | |
1552 | { | |
1553 | /* Set local fields. */ | |
1554 | memset (&ret->esym, 0, sizeof (EXTR)); | |
1555 | /* We use -2 as a marker to indicate that the information has | |
1556 | not been set. -1 means there is no associated ifd. */ | |
1557 | ret->esym.ifd = -2; | |
1558 | } | |
1559 | ||
1560 | return (struct bfd_hash_entry *) ret; | |
1561 | } | |
1562 | ||
1563 | /* Create a MIPS ELF linker hash table. */ | |
1564 | ||
1565 | static struct bfd_link_hash_table * | |
1566 | mips_elf_link_hash_table_create (abfd) | |
1567 | bfd *abfd; | |
1568 | { | |
1569 | struct mips_elf_link_hash_table *ret; | |
1570 | ||
1571 | ret = ((struct mips_elf_link_hash_table *) | |
1572 | bfd_alloc (abfd, sizeof (struct mips_elf_link_hash_table))); | |
1573 | if (ret == (struct mips_elf_link_hash_table *) NULL) | |
1574 | { | |
1575 | bfd_set_error (bfd_error_no_memory); | |
1576 | return NULL; | |
1577 | } | |
1578 | ||
1579 | if (! _bfd_elf_link_hash_table_init (&ret->root, abfd, | |
1580 | mips_elf_link_hash_newfunc)) | |
1581 | { | |
1582 | bfd_release (abfd, ret); | |
1583 | return NULL; | |
1584 | } | |
1585 | ||
1586 | return &ret->root.root; | |
1587 | } | |
1588 | ||
1589 | /* Hook called by the linker routine which adds symbols from an object | |
1590 | file. We must handle the special MIPS section numbers here. */ | |
1591 | ||
1592 | /*ARGSUSED*/ | |
6e07e54f | 1593 | static boolean |
aac6b32f ILT |
1594 | mips_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp) |
1595 | bfd *abfd; | |
1596 | struct bfd_link_info *info; | |
1597 | const Elf_Internal_Sym *sym; | |
1598 | const char **namep; | |
1599 | flagword *flagsp; | |
1600 | asection **secp; | |
1601 | bfd_vma *valp; | |
1602 | { | |
1603 | switch (sym->st_shndx) | |
1604 | { | |
1605 | case SHN_COMMON: | |
1606 | /* Common symbols less than the GP size are automatically | |
1607 | treated as SHN_MIPS_SCOMMON symbols. */ | |
1608 | if (sym->st_size > elf_gp_size (abfd)) | |
1609 | break; | |
1610 | /* Fall through. */ | |
1611 | case SHN_MIPS_SCOMMON: | |
1612 | *secp = bfd_make_section_old_way (abfd, ".scommon"); | |
1613 | (*secp)->flags |= SEC_IS_COMMON; | |
1614 | *valp = sym->st_size; | |
1615 | break; | |
1616 | ||
1617 | case SHN_MIPS_SUNDEFINED: | |
24f13b03 | 1618 | *secp = bfd_und_section_ptr; |
aac6b32f ILT |
1619 | break; |
1620 | } | |
1621 | ||
1622 | return true; | |
1623 | } | |
1624 | ||
1625 | /* Structure used to pass information to mips_elf_output_extsym. */ | |
1626 | ||
1627 | struct extsym_info | |
6e07e54f | 1628 | { |
aac6b32f ILT |
1629 | bfd *abfd; |
1630 | struct bfd_link_info *info; | |
1631 | struct ecoff_debug_info *debug; | |
9783e04a | 1632 | const struct ecoff_debug_swap *swap; |
aac6b32f ILT |
1633 | boolean failed; |
1634 | }; | |
9783e04a | 1635 | |
aac6b32f ILT |
1636 | /* This routine is used to write out ECOFF debugging external symbol |
1637 | information. It is called via mips_elf_link_hash_traverse. The | |
1638 | ECOFF external symbol information must match the ELF external | |
1639 | symbol information. Unfortunately, at this point we don't know | |
1640 | whether a symbol is required by reloc information, so the two | |
1641 | tables may wind up being different. We must sort out the external | |
1642 | symbol information before we can set the final size of the .mdebug | |
1643 | section, and we must set the size of the .mdebug section before we | |
1644 | can relocate any sections, and we can't know which symbols are | |
1645 | required by relocation until we relocate the sections. | |
1646 | Fortunately, it is relatively unlikely that any symbol will be | |
1647 | stripped but required by a reloc. In particular, it can not happen | |
1648 | when generating a final executable. */ | |
1649 | ||
1650 | static boolean | |
1651 | mips_elf_output_extsym (h, data) | |
1652 | struct mips_elf_link_hash_entry *h; | |
1653 | PTR data; | |
1654 | { | |
1655 | struct extsym_info *einfo = (struct extsym_info *) data; | |
1656 | boolean strip; | |
1657 | ||
1658 | if (h->root.indx == -2) | |
1659 | strip = false; | |
1660 | else if (((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
1661 | || (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0) | |
1662 | && (h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 | |
1663 | && (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) | |
1664 | strip = true; | |
1665 | else if (einfo->info->strip == strip_all | |
1666 | || (einfo->info->strip == strip_some | |
1667 | && bfd_hash_lookup (einfo->info->keep_hash, | |
1668 | h->root.root.root.string, | |
1669 | false, false) == NULL)) | |
1670 | strip = true; | |
1671 | else | |
1672 | strip = false; | |
1673 | ||
1674 | if (strip) | |
1675 | return true; | |
6e07e54f | 1676 | |
aac6b32f | 1677 | if (h->esym.ifd == -2) |
6e07e54f | 1678 | { |
aac6b32f ILT |
1679 | h->esym.jmptbl = 0; |
1680 | h->esym.cobol_main = 0; | |
1681 | h->esym.weakext = 0; | |
1682 | h->esym.reserved = 0; | |
1683 | h->esym.ifd = ifdNil; | |
1684 | h->esym.asym.value = 0; | |
1685 | h->esym.asym.st = stGlobal; | |
1686 | ||
1687 | if (h->root.root.type != bfd_link_hash_defined) | |
1688 | h->esym.asym.sc = scAbs; | |
1689 | else | |
1690 | { | |
1691 | asection *output_section; | |
1692 | const char *name; | |
1693 | ||
1694 | output_section = h->root.root.u.def.section->output_section; | |
1695 | name = bfd_section_name (output_section->owner, output_section); | |
1696 | ||
1697 | if (strcmp (name, ".text") == 0) | |
1698 | h->esym.asym.sc = scText; | |
1699 | else if (strcmp (name, ".data") == 0) | |
1700 | h->esym.asym.sc = scData; | |
1701 | else if (strcmp (name, ".sdata") == 0) | |
1702 | h->esym.asym.sc = scSData; | |
1703 | else if (strcmp (name, ".rodata") == 0 | |
1704 | || strcmp (name, ".rdata") == 0) | |
1705 | h->esym.asym.sc = scRData; | |
1706 | else if (strcmp (name, ".bss") == 0) | |
1707 | h->esym.asym.sc = scBss; | |
1708 | else if (strcmp (name, ".sbss") == 0) | |
1709 | h->esym.asym.sc = scSBss; | |
1710 | else if (strcmp (name, ".init") == 0) | |
1711 | h->esym.asym.sc = scInit; | |
1712 | else if (strcmp (name, ".fini") == 0) | |
1713 | h->esym.asym.sc = scFini; | |
1714 | else | |
1715 | h->esym.asym.sc = scAbs; | |
1716 | } | |
1717 | ||
1718 | h->esym.asym.reserved = 0; | |
1719 | h->esym.asym.index = indexNil; | |
6e07e54f ILT |
1720 | } |
1721 | ||
16fe8950 ILT |
1722 | if (h->root.root.type == bfd_link_hash_common) |
1723 | h->esym.asym.value = h->root.root.u.c.size; | |
1724 | else if (h->root.root.type == bfd_link_hash_defined) | |
1725 | { | |
1726 | asection *sec; | |
1727 | ||
1728 | if (h->esym.asym.sc == scCommon) | |
1729 | h->esym.asym.sc = scBss; | |
1730 | else if (h->esym.asym.sc == scSCommon) | |
1731 | h->esym.asym.sc = scSBss; | |
1732 | ||
1733 | sec = h->root.root.u.def.section; | |
1734 | h->esym.asym.value = (h->root.root.u.def.value | |
1735 | + sec->output_offset | |
1736 | + sec->output_section->vma); | |
1737 | } | |
aac6b32f ILT |
1738 | |
1739 | if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap, | |
1740 | h->root.root.root.string, | |
1741 | &h->esym)) | |
1742 | { | |
1743 | einfo->failed = true; | |
1744 | return false; | |
1745 | } | |
6e07e54f ILT |
1746 | |
1747 | return true; | |
1748 | } | |
1749 | ||
aac6b32f | 1750 | /* A comparison routine used to sort .gptab entries. */ |
6e07e54f | 1751 | |
aac6b32f ILT |
1752 | static int |
1753 | gptab_compare (p1, p2) | |
1754 | const PTR p1; | |
1755 | const PTR p2; | |
6e07e54f | 1756 | { |
aac6b32f ILT |
1757 | const Elf32_gptab *a1 = (const Elf32_gptab *) p1; |
1758 | const Elf32_gptab *a2 = (const Elf32_gptab *) p2; | |
1759 | ||
1760 | return a1->gt_entry.gt_g_value - a2->gt_entry.gt_g_value; | |
6e07e54f ILT |
1761 | } |
1762 | ||
1763 | /* We need to use a special link routine to handle the .reginfo and | |
1764 | the .mdebug sections. We need to merge all instances of these | |
1765 | sections together, not write them all out sequentially. */ | |
1766 | ||
1767 | static boolean | |
1768 | mips_elf_final_link (abfd, info) | |
1769 | bfd *abfd; | |
1770 | struct bfd_link_info *info; | |
1771 | { | |
6e07e54f ILT |
1772 | asection **secpp; |
1773 | asection *o; | |
1774 | struct bfd_link_order *p; | |
aac6b32f | 1775 | asection *reginfo_sec, *mdebug_sec, *gptab_data_sec, *gptab_bss_sec; |
b3c0fc57 | 1776 | Elf32_RegInfo reginfo; |
6e07e54f ILT |
1777 | struct ecoff_debug_info debug; |
1778 | const struct ecoff_debug_swap *swap | |
1779 | = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; | |
1780 | HDRR *symhdr = &debug.symbolic_header; | |
9783e04a | 1781 | PTR mdebug_handle = NULL; |
6e07e54f | 1782 | |
497c5434 | 1783 | /* Drop the .options section, since it has special semantics which I |
aac6b32f ILT |
1784 | haven't bothered to figure out. */ |
1785 | for (secpp = &abfd->sections; *secpp != NULL; secpp = &(*secpp)->next) | |
6e07e54f | 1786 | { |
aac6b32f | 1787 | if (strcmp ((*secpp)->name, ".options") == 0) |
6e07e54f | 1788 | { |
aac6b32f ILT |
1789 | for (p = (*secpp)->link_order_head; p != NULL; p = p->next) |
1790 | if (p->type == bfd_indirect_link_order) | |
1791 | p->u.indirect.section->flags &=~ SEC_HAS_CONTENTS; | |
1792 | (*secpp)->link_order_head = NULL; | |
6e07e54f ILT |
1793 | *secpp = (*secpp)->next; |
1794 | --abfd->section_count; | |
aac6b32f | 1795 | break; |
6e07e54f | 1796 | } |
6e07e54f | 1797 | } |
b3c0fc57 | 1798 | |
6e07e54f | 1799 | /* Go through the sections and collect the .reginfo and .mdebug |
aac6b32f | 1800 | information. */ |
9783e04a DM |
1801 | reginfo_sec = NULL; |
1802 | mdebug_sec = NULL; | |
aac6b32f ILT |
1803 | gptab_data_sec = NULL; |
1804 | gptab_bss_sec = NULL; | |
6e07e54f | 1805 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) |
b3c0fc57 | 1806 | { |
6e07e54f | 1807 | if (strcmp (o->name, ".reginfo") == 0) |
b3c0fc57 | 1808 | { |
6e07e54f | 1809 | memset (®info, 0, sizeof reginfo); |
b3c0fc57 ILT |
1810 | |
1811 | /* We have found the .reginfo section in the output file. | |
6e07e54f ILT |
1812 | Look through all the link_orders comprising it and merge |
1813 | the information together. */ | |
1814 | for (p = o->link_order_head; | |
1815 | p != (struct bfd_link_order *) NULL; | |
b3c0fc57 ILT |
1816 | p = p->next) |
1817 | { | |
6e07e54f ILT |
1818 | asection *input_section; |
1819 | bfd *input_bfd; | |
1820 | Elf32_External_RegInfo ext; | |
1821 | Elf32_RegInfo sub; | |
1822 | ||
1823 | if (p->type != bfd_indirect_link_order) | |
aac6b32f ILT |
1824 | { |
1825 | if (p->type == bfd_fill_link_order) | |
1826 | continue; | |
1827 | abort (); | |
1828 | } | |
6e07e54f ILT |
1829 | |
1830 | input_section = p->u.indirect.section; | |
1831 | input_bfd = input_section->owner; | |
1832 | BFD_ASSERT (input_section->_raw_size | |
1833 | == sizeof (Elf32_External_RegInfo)); | |
1834 | if (! bfd_get_section_contents (input_bfd, input_section, | |
1835 | (PTR) &ext, | |
1836 | (file_ptr) 0, | |
1837 | sizeof ext)) | |
1838 | return false; | |
1839 | ||
1840 | bfd_mips_elf32_swap_reginfo_in (input_bfd, &ext, &sub); | |
1841 | ||
1842 | reginfo.ri_gprmask |= sub.ri_gprmask; | |
1843 | reginfo.ri_cprmask[0] |= sub.ri_cprmask[0]; | |
1844 | reginfo.ri_cprmask[1] |= sub.ri_cprmask[1]; | |
1845 | reginfo.ri_cprmask[2] |= sub.ri_cprmask[2]; | |
1846 | reginfo.ri_cprmask[3] |= sub.ri_cprmask[3]; | |
1847 | ||
1848 | /* ri_gp_value is set by the function | |
1849 | mips_elf_section_processing when the section is | |
1850 | finally written out. */ | |
aac6b32f ILT |
1851 | |
1852 | /* Hack: reset the SEC_HAS_CONTENTS flag so that | |
1853 | elf_link_input_bfd ignores this section. */ | |
1854 | input_section->flags &=~ SEC_HAS_CONTENTS; | |
6e07e54f ILT |
1855 | } |
1856 | ||
1857 | /* Force the section size to the value we want. */ | |
1858 | o->_raw_size = sizeof (Elf32_External_RegInfo); | |
1859 | ||
aac6b32f ILT |
1860 | /* Skip this section later on (I don't think this currently |
1861 | matters, but someday it might). */ | |
6e07e54f ILT |
1862 | o->link_order_head = (struct bfd_link_order *) NULL; |
1863 | ||
1864 | reginfo_sec = o; | |
1865 | } | |
1866 | ||
1867 | if (strcmp (o->name, ".mdebug") == 0) | |
1868 | { | |
aac6b32f ILT |
1869 | struct extsym_info einfo; |
1870 | ||
6e07e54f ILT |
1871 | /* We have found the .mdebug section in the output file. |
1872 | Look through all the link_orders comprising it and merge | |
1873 | the information together. */ | |
1874 | symhdr->magic = swap->sym_magic; | |
1875 | /* FIXME: What should the version stamp be? */ | |
1876 | symhdr->vstamp = 0; | |
1877 | symhdr->ilineMax = 0; | |
1878 | symhdr->cbLine = 0; | |
1879 | symhdr->idnMax = 0; | |
1880 | symhdr->ipdMax = 0; | |
1881 | symhdr->isymMax = 0; | |
1882 | symhdr->ioptMax = 0; | |
1883 | symhdr->iauxMax = 0; | |
1884 | symhdr->issMax = 0; | |
1885 | symhdr->issExtMax = 0; | |
1886 | symhdr->ifdMax = 0; | |
1887 | symhdr->crfd = 0; | |
1888 | symhdr->iextMax = 0; | |
1889 | ||
1890 | /* We accumulate the debugging information itself in the | |
1891 | debug_info structure. */ | |
9783e04a DM |
1892 | debug.line = NULL; |
1893 | debug.external_dnr = NULL; | |
1894 | debug.external_pdr = NULL; | |
1895 | debug.external_sym = NULL; | |
1896 | debug.external_opt = NULL; | |
1897 | debug.external_aux = NULL; | |
1898 | debug.ss = NULL; | |
6e07e54f | 1899 | debug.ssext = debug.ssext_end = NULL; |
9783e04a DM |
1900 | debug.external_fdr = NULL; |
1901 | debug.external_rfd = NULL; | |
6e07e54f ILT |
1902 | debug.external_ext = debug.external_ext_end = NULL; |
1903 | ||
9783e04a DM |
1904 | mdebug_handle = bfd_ecoff_debug_init (abfd, &debug, swap, info); |
1905 | if (mdebug_handle == (PTR) NULL) | |
1906 | return false; | |
1907 | ||
6e07e54f ILT |
1908 | for (p = o->link_order_head; |
1909 | p != (struct bfd_link_order *) NULL; | |
1910 | p = p->next) | |
1911 | { | |
1912 | asection *input_section; | |
1913 | bfd *input_bfd; | |
1914 | const struct ecoff_debug_swap *input_swap; | |
1915 | struct ecoff_debug_info input_debug; | |
aac6b32f ILT |
1916 | char *eraw_src; |
1917 | char *eraw_end; | |
6e07e54f ILT |
1918 | |
1919 | if (p->type != bfd_indirect_link_order) | |
aac6b32f ILT |
1920 | { |
1921 | if (p->type == bfd_fill_link_order) | |
1922 | continue; | |
1923 | abort (); | |
1924 | } | |
6e07e54f ILT |
1925 | |
1926 | input_section = p->u.indirect.section; | |
1927 | input_bfd = input_section->owner; | |
1928 | ||
1929 | if (bfd_get_flavour (input_bfd) != bfd_target_elf_flavour | |
1930 | || (get_elf_backend_data (input_bfd) | |
1931 | ->elf_backend_ecoff_debug_swap) == NULL) | |
b3c0fc57 | 1932 | { |
6e07e54f ILT |
1933 | /* I don't know what a non MIPS ELF bfd would be |
1934 | doing with a .mdebug section, but I don't really | |
1935 | want to deal with it. */ | |
1936 | continue; | |
b3c0fc57 | 1937 | } |
6e07e54f ILT |
1938 | |
1939 | input_swap = (get_elf_backend_data (input_bfd) | |
1940 | ->elf_backend_ecoff_debug_swap); | |
1941 | ||
1942 | BFD_ASSERT (p->size == input_section->_raw_size); | |
1943 | ||
1944 | /* The ECOFF linking code expects that we have already | |
1945 | read in the debugging information and set up an | |
1946 | ecoff_debug_info structure, so we do that now. */ | |
1947 | if (! mips_elf_read_ecoff_info (input_bfd, input_section, | |
1948 | &input_debug)) | |
1949 | return false; | |
1950 | ||
1951 | if (! (bfd_ecoff_debug_accumulate | |
9783e04a DM |
1952 | (mdebug_handle, abfd, &debug, swap, input_bfd, |
1953 | &input_debug, input_swap, info))) | |
6e07e54f ILT |
1954 | return false; |
1955 | ||
1956 | /* Loop through the external symbols. For each one with | |
aac6b32f ILT |
1957 | interesting information, try to find the symbol in |
1958 | the linker global hash table and save the information | |
1959 | for the output external symbols. */ | |
1960 | eraw_src = input_debug.external_ext; | |
1961 | eraw_end = (eraw_src | |
1962 | + (input_debug.symbolic_header.iextMax | |
1963 | * input_swap->external_ext_size)); | |
1964 | for (; | |
1965 | eraw_src < eraw_end; | |
1966 | eraw_src += input_swap->external_ext_size) | |
6e07e54f | 1967 | { |
aac6b32f ILT |
1968 | EXTR ext; |
1969 | const char *name; | |
1970 | struct mips_elf_link_hash_entry *h; | |
1971 | ||
1972 | (*input_swap->swap_ext_in) (input_bfd, (PTR) eraw_src, &ext); | |
1973 | if (ext.asym.sc == scNil | |
1974 | || ext.asym.sc == scUndefined | |
1975 | || ext.asym.sc == scSUndefined) | |
1976 | continue; | |
1977 | ||
1978 | name = input_debug.ssext + ext.asym.iss; | |
1979 | h = mips_elf_link_hash_lookup (mips_elf_hash_table (info), | |
1980 | name, false, false, true); | |
1981 | if (h == NULL || h->esym.ifd != -2) | |
1982 | continue; | |
1983 | ||
1984 | if (ext.ifd != -1) | |
6e07e54f | 1985 | { |
aac6b32f ILT |
1986 | BFD_ASSERT (ext.ifd |
1987 | < input_debug.symbolic_header.ifdMax); | |
1988 | ext.ifd = input_debug.ifdmap[ext.ifd]; | |
6e07e54f | 1989 | } |
aac6b32f ILT |
1990 | |
1991 | h->esym = ext; | |
6e07e54f ILT |
1992 | } |
1993 | ||
aac6b32f | 1994 | /* Free up the information we just read. */ |
6e07e54f ILT |
1995 | free (input_debug.line); |
1996 | free (input_debug.external_dnr); | |
1997 | free (input_debug.external_pdr); | |
1998 | free (input_debug.external_sym); | |
1999 | free (input_debug.external_opt); | |
2000 | free (input_debug.external_aux); | |
2001 | free (input_debug.ss); | |
2002 | free (input_debug.ssext); | |
2003 | free (input_debug.external_fdr); | |
2004 | free (input_debug.external_rfd); | |
aac6b32f ILT |
2005 | free (input_debug.external_ext); |
2006 | ||
2007 | /* Hack: reset the SEC_HAS_CONTENTS flag so that | |
2008 | elf_link_input_bfd ignores this section. */ | |
2009 | input_section->flags &=~ SEC_HAS_CONTENTS; | |
b3c0fc57 ILT |
2010 | } |
2011 | ||
6e07e54f | 2012 | /* Build the external symbol information. */ |
aac6b32f ILT |
2013 | einfo.abfd = abfd; |
2014 | einfo.info = info; | |
2015 | einfo.debug = &debug; | |
2016 | einfo.swap = swap; | |
2017 | einfo.failed = false; | |
2018 | mips_elf_link_hash_traverse (mips_elf_hash_table (info), | |
2019 | mips_elf_output_extsym, | |
2020 | (PTR) &einfo); | |
2021 | if (einfo.failed) | |
b3c0fc57 ILT |
2022 | return false; |
2023 | ||
aac6b32f | 2024 | /* Set the size of the .mdebug section. */ |
6e07e54f ILT |
2025 | o->_raw_size = bfd_ecoff_debug_size (abfd, &debug, swap); |
2026 | ||
aac6b32f ILT |
2027 | /* Skip this section later on (I don't think this currently |
2028 | matters, but someday it might). */ | |
6e07e54f ILT |
2029 | o->link_order_head = (struct bfd_link_order *) NULL; |
2030 | ||
2031 | mdebug_sec = o; | |
2032 | } | |
6e07e54f | 2033 | |
aac6b32f | 2034 | if (strncmp (o->name, ".gptab.", sizeof ".gptab." - 1) == 0) |
6e07e54f | 2035 | { |
aac6b32f ILT |
2036 | const char *subname; |
2037 | unsigned int c; | |
2038 | Elf32_gptab *tab; | |
2039 | Elf32_External_gptab *ext_tab; | |
2040 | unsigned int i; | |
2041 | ||
2042 | /* The .gptab.sdata and .gptab.sbss sections hold | |
2043 | information describing how the small data area would | |
2044 | change depending upon the -G switch. These sections | |
2045 | not used in executables files. */ | |
2046 | if (! info->relocateable) | |
2047 | { | |
2048 | asection **secpp; | |
2049 | ||
2050 | for (p = o->link_order_head; | |
2051 | p != (struct bfd_link_order *) NULL; | |
2052 | p = p->next) | |
2053 | { | |
2054 | asection *input_section; | |
2055 | ||
2056 | if (p->type != bfd_indirect_link_order) | |
2057 | { | |
2058 | if (p->type == bfd_fill_link_order) | |
2059 | continue; | |
2060 | abort (); | |
2061 | } | |
2062 | ||
2063 | input_section = p->u.indirect.section; | |
2064 | ||
2065 | /* Hack: reset the SEC_HAS_CONTENTS flag so that | |
2066 | elf_link_input_bfd ignores this section. */ | |
2067 | input_section->flags &=~ SEC_HAS_CONTENTS; | |
2068 | } | |
2069 | ||
2070 | /* Skip this section later on (I don't think this | |
2071 | currently matters, but someday it might). */ | |
2072 | o->link_order_head = (struct bfd_link_order *) NULL; | |
2073 | ||
2074 | /* Really remove the section. */ | |
2075 | for (secpp = &abfd->sections; | |
2076 | *secpp != o; | |
2077 | secpp = &(*secpp)->next) | |
2078 | ; | |
2079 | *secpp = (*secpp)->next; | |
2080 | --abfd->section_count; | |
2081 | ||
2082 | continue; | |
2083 | } | |
2084 | ||
2085 | /* There is one gptab for initialized data, and one for | |
2086 | uninitialized data. */ | |
2087 | if (strcmp (o->name, ".gptab.sdata") == 0) | |
2088 | gptab_data_sec = o; | |
2089 | else if (strcmp (o->name, ".gptab.sbss") == 0) | |
2090 | gptab_bss_sec = o; | |
2091 | else | |
2092 | { | |
2093 | bfd_set_error (bfd_error_nonrepresentable_section); | |
2094 | return false; | |
2095 | } | |
2096 | ||
2097 | /* The linker script always combines .gptab.data and | |
2098 | .gptab.sdata into .gptab.sdata, and likewise for | |
2099 | .gptab.bss and .gptab.sbss. It is possible that there is | |
2100 | no .sdata or .sbss section in the output file, in which | |
2101 | case we must change the name of the output section. */ | |
2102 | subname = o->name + sizeof ".gptab" - 1; | |
2103 | if (bfd_get_section_by_name (abfd, subname) == NULL) | |
2104 | { | |
2105 | if (o == gptab_data_sec) | |
2106 | o->name = ".gptab.data"; | |
2107 | else | |
2108 | o->name = ".gptab.bss"; | |
2109 | subname = o->name + sizeof ".gptab" - 1; | |
2110 | BFD_ASSERT (bfd_get_section_by_name (abfd, subname) != NULL); | |
2111 | } | |
2112 | ||
2113 | /* Set up the first entry. */ | |
2114 | c = 1; | |
2115 | tab = (Elf32_gptab *) malloc (c * sizeof (Elf32_gptab)); | |
2116 | if (tab == NULL) | |
2117 | { | |
2118 | bfd_set_error (bfd_error_no_memory); | |
2119 | return false; | |
2120 | } | |
2121 | tab[0].gt_header.gt_current_g_value = elf_gp_size (abfd); | |
2122 | tab[0].gt_header.gt_unused = 0; | |
2123 | ||
2124 | /* Combine the input sections. */ | |
6e07e54f ILT |
2125 | for (p = o->link_order_head; |
2126 | p != (struct bfd_link_order *) NULL; | |
2127 | p = p->next) | |
2128 | { | |
aac6b32f ILT |
2129 | asection *input_section; |
2130 | bfd *input_bfd; | |
2131 | bfd_size_type size; | |
2132 | unsigned long last; | |
2133 | bfd_size_type gpentry; | |
2134 | ||
2135 | if (p->type != bfd_indirect_link_order) | |
6e07e54f | 2136 | { |
aac6b32f ILT |
2137 | if (p->type == bfd_fill_link_order) |
2138 | continue; | |
2139 | abort (); | |
2140 | } | |
6e07e54f | 2141 | |
aac6b32f ILT |
2142 | input_section = p->u.indirect.section; |
2143 | input_bfd = input_section->owner; | |
2144 | ||
2145 | /* Combine the gptab entries for this input section one | |
2146 | by one. We know that the input gptab entries are | |
2147 | sorted by ascending -G value. */ | |
2148 | size = bfd_section_size (input_bfd, input_section); | |
2149 | last = 0; | |
2150 | for (gpentry = sizeof (Elf32_External_gptab); | |
2151 | gpentry < size; | |
2152 | gpentry += sizeof (Elf32_External_gptab)) | |
2153 | { | |
2154 | Elf32_External_gptab ext_gptab; | |
2155 | Elf32_gptab int_gptab; | |
2156 | unsigned long val; | |
2157 | unsigned long add; | |
2158 | boolean exact; | |
2159 | unsigned int look; | |
2160 | ||
2161 | if (! (bfd_get_section_contents | |
2162 | (input_bfd, input_section, (PTR) &ext_gptab, | |
2163 | gpentry, sizeof (Elf32_External_gptab)))) | |
9783e04a | 2164 | { |
aac6b32f | 2165 | free (tab); |
9783e04a DM |
2166 | return false; |
2167 | } | |
aac6b32f ILT |
2168 | |
2169 | bfd_mips_elf32_swap_gptab_in (input_bfd, &ext_gptab, | |
2170 | &int_gptab); | |
2171 | val = int_gptab.gt_entry.gt_g_value; | |
2172 | add = int_gptab.gt_entry.gt_bytes - last; | |
2173 | ||
2174 | exact = false; | |
2175 | for (look = 1; look < c; look++) | |
2176 | { | |
2177 | if (tab[look].gt_entry.gt_g_value >= val) | |
2178 | tab[look].gt_entry.gt_bytes += add; | |
2179 | ||
2180 | if (tab[look].gt_entry.gt_g_value == val) | |
2181 | exact = true; | |
2182 | } | |
2183 | ||
2184 | if (! exact) | |
2185 | { | |
2186 | Elf32_gptab *new_tab; | |
2187 | unsigned int max; | |
2188 | ||
2189 | /* We need a new table entry. */ | |
2190 | new_tab = ((Elf32_gptab *) | |
2191 | realloc ((PTR) tab, | |
2192 | (c + 1) * sizeof (Elf32_gptab))); | |
2193 | if (new_tab == NULL) | |
2194 | { | |
2195 | bfd_set_error (bfd_error_no_memory); | |
2196 | free (tab); | |
2197 | return false; | |
2198 | } | |
2199 | tab = new_tab; | |
2200 | tab[c].gt_entry.gt_g_value = val; | |
2201 | tab[c].gt_entry.gt_bytes = add; | |
2202 | ||
2203 | /* Merge in the size for the next smallest -G | |
2204 | value, since that will be implied by this new | |
2205 | value. */ | |
2206 | max = 0; | |
2207 | for (look = 1; look < c; look++) | |
2208 | { | |
2209 | if (tab[look].gt_entry.gt_g_value < val | |
2210 | && (max == 0 | |
2211 | || (tab[look].gt_entry.gt_g_value | |
2212 | > tab[max].gt_entry.gt_g_value))) | |
2213 | max = look; | |
2214 | } | |
2215 | if (max != 0) | |
2216 | tab[c].gt_entry.gt_bytes += | |
2217 | tab[max].gt_entry.gt_bytes; | |
2218 | ||
2219 | ++c; | |
2220 | } | |
2221 | ||
2222 | last = int_gptab.gt_entry.gt_bytes; | |
6e07e54f | 2223 | } |
aac6b32f ILT |
2224 | |
2225 | /* Hack: reset the SEC_HAS_CONTENTS flag so that | |
2226 | elf_link_input_bfd ignores this section. */ | |
2227 | input_section->flags &=~ SEC_HAS_CONTENTS; | |
6e07e54f | 2228 | } |
aac6b32f ILT |
2229 | |
2230 | /* The table must be sorted by -G value. */ | |
2231 | if (c > 2) | |
2232 | qsort (tab + 1, c - 1, sizeof (tab[0]), gptab_compare); | |
2233 | ||
2234 | /* Swap out the table. */ | |
2235 | ext_tab = ((Elf32_External_gptab *) | |
2236 | bfd_alloc (abfd, c * sizeof (Elf32_External_gptab))); | |
2237 | if (ext_tab == NULL) | |
6e07e54f | 2238 | { |
aac6b32f ILT |
2239 | bfd_set_error (bfd_error_no_memory); |
2240 | free (tab); | |
2241 | return false; | |
2242 | } | |
2243 | ||
2244 | for (i = 0; i < c; i++) | |
2245 | bfd_mips_elf32_swap_gptab_out (abfd, tab + i, ext_tab + i); | |
2246 | free (tab); | |
2247 | ||
2248 | o->_raw_size = c * sizeof (Elf32_External_gptab); | |
2249 | o->contents = (bfd_byte *) ext_tab; | |
2250 | ||
2251 | /* Skip this section later on (I don't think this currently | |
2252 | matters, but someday it might). */ | |
2253 | o->link_order_head = (struct bfd_link_order *) NULL; | |
2254 | } | |
2255 | } | |
2256 | ||
2257 | /* Get a value for the GP register. */ | |
2258 | if (elf_gp (abfd) == 0) | |
2259 | { | |
2260 | struct bfd_link_hash_entry *h; | |
2261 | ||
2262 | h = bfd_link_hash_lookup (info->hash, "_gp", false, false, true); | |
2263 | if (h != (struct bfd_link_hash_entry *) NULL | |
2264 | && h->type == bfd_link_hash_defined) | |
2265 | elf_gp (abfd) = (h->u.def.value | |
2266 | + h->u.def.section->output_section->vma | |
2267 | + h->u.def.section->output_offset); | |
2268 | else if (info->relocateable) | |
2269 | { | |
2270 | bfd_vma lo; | |
2271 | ||
2272 | /* Make up a value. */ | |
2273 | lo = (bfd_vma) -1; | |
2274 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) | |
2275 | { | |
2276 | if (o->vma < lo | |
2277 | && (strcmp (o->name, ".sbss") == 0 | |
2278 | || strcmp (o->name, ".sdata") == 0 | |
2279 | || strcmp (o->name, ".lit4") == 0 | |
2280 | || strcmp (o->name, ".lit8") == 0)) | |
2281 | lo = o->vma; | |
6e07e54f | 2282 | } |
aac6b32f ILT |
2283 | elf_gp (abfd) = lo + 0x8000; |
2284 | } | |
2285 | else | |
2286 | { | |
2287 | /* If the relocate_section function needs to do a reloc | |
2288 | involving the GP value, it should make a reloc_dangerous | |
2289 | callback to warn that GP is not defined. */ | |
6e07e54f ILT |
2290 | } |
2291 | } | |
b3c0fc57 | 2292 | |
aac6b32f ILT |
2293 | /* Invoke the regular ELF backend linker to do all the work. */ |
2294 | if (! bfd_elf32_bfd_final_link (abfd, info)) | |
2295 | return false; | |
2296 | ||
2297 | /* Now write out the computed sections. */ | |
2298 | ||
6e07e54f ILT |
2299 | if (reginfo_sec != (asection *) NULL) |
2300 | { | |
2301 | Elf32_External_RegInfo ext; | |
2302 | ||
2303 | bfd_mips_elf32_swap_reginfo_out (abfd, ®info, &ext); | |
2304 | if (! bfd_set_section_contents (abfd, reginfo_sec, (PTR) &ext, | |
2305 | (file_ptr) 0, sizeof ext)) | |
2306 | return false; | |
2307 | } | |
b3c0fc57 | 2308 | |
6e07e54f ILT |
2309 | if (mdebug_sec != (asection *) NULL) |
2310 | { | |
aac6b32f | 2311 | BFD_ASSERT (abfd->output_has_begun); |
9783e04a DM |
2312 | if (! bfd_ecoff_write_accumulated_debug (mdebug_handle, abfd, &debug, |
2313 | swap, info, | |
2314 | mdebug_sec->filepos)) | |
6e07e54f | 2315 | return false; |
9783e04a DM |
2316 | |
2317 | bfd_ecoff_debug_free (mdebug_handle, abfd, &debug, swap, info); | |
b3c0fc57 ILT |
2318 | } |
2319 | ||
aac6b32f | 2320 | if (gptab_data_sec != (asection *) NULL) |
6e07e54f | 2321 | { |
aac6b32f ILT |
2322 | if (! bfd_set_section_contents (abfd, gptab_data_sec, |
2323 | gptab_data_sec->contents, | |
2324 | (file_ptr) 0, | |
2325 | gptab_data_sec->_raw_size)) | |
2326 | return false; | |
2327 | } | |
2328 | ||
2329 | if (gptab_bss_sec != (asection *) NULL) | |
2330 | { | |
2331 | if (! bfd_set_section_contents (abfd, gptab_bss_sec, | |
2332 | gptab_bss_sec->contents, | |
2333 | (file_ptr) 0, | |
2334 | gptab_bss_sec->_raw_size)) | |
2335 | return false; | |
6e07e54f ILT |
2336 | } |
2337 | ||
2338 | return true; | |
b3c0fc57 | 2339 | } |
6e07e54f | 2340 | |
aac6b32f | 2341 | /* Handle a MIPS ELF HI16 reloc. */ |
b3c0fc57 ILT |
2342 | |
2343 | static void | |
aac6b32f ILT |
2344 | mips_elf_relocate_hi16 (input_bfd, relhi, rello, contents, addend) |
2345 | bfd *input_bfd; | |
2346 | Elf_Internal_Rela *relhi; | |
2347 | Elf_Internal_Rela *rello; | |
2348 | bfd_byte *contents; | |
2349 | bfd_vma addend; | |
b3c0fc57 | 2350 | { |
aac6b32f ILT |
2351 | bfd_vma insn; |
2352 | bfd_vma addlo; | |
b3c0fc57 | 2353 | |
aac6b32f ILT |
2354 | insn = bfd_get_32 (input_bfd, contents + relhi->r_offset); |
2355 | ||
2356 | addlo = bfd_get_32 (input_bfd, contents + rello->r_offset); | |
2357 | addlo &= 0xffff; | |
2358 | ||
2359 | addend += ((insn & 0xffff) << 16) + addlo; | |
2360 | ||
2361 | if ((addlo & 0x8000) != 0) | |
2362 | addend -= 0x10000; | |
2363 | if ((addend & 0x8000) != 0) | |
2364 | addend += 0x10000; | |
2365 | ||
2366 | bfd_put_32 (input_bfd, | |
2367 | (insn & 0xffff0000) | ((addend >> 16) & 0xffff), | |
2368 | contents + relhi->r_offset); | |
2369 | } | |
2370 | ||
2371 | /* Relocate a MIPS ELF section. */ | |
2372 | ||
2373 | static boolean | |
2374 | mips_elf_relocate_section (output_bfd, info, input_bfd, input_section, | |
82b1edf7 | 2375 | contents, relocs, local_syms, local_sections) |
aac6b32f ILT |
2376 | bfd *output_bfd; |
2377 | struct bfd_link_info *info; | |
2378 | bfd *input_bfd; | |
2379 | asection *input_section; | |
2380 | bfd_byte *contents; | |
2381 | Elf_Internal_Rela *relocs; | |
2382 | Elf_Internal_Sym *local_syms; | |
2383 | asection **local_sections; | |
2384 | { | |
2385 | Elf_Internal_Shdr *symtab_hdr; | |
2386 | size_t locsymcount; | |
2387 | size_t extsymoff; | |
2388 | Elf_Internal_Rela *rel; | |
2389 | Elf_Internal_Rela *relend; | |
2390 | ||
2391 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
2392 | ||
2393 | if (elf_bad_symtab (input_bfd)) | |
b3c0fc57 | 2394 | { |
aac6b32f ILT |
2395 | locsymcount = symtab_hdr->sh_size / sizeof (Elf32_External_Sym); |
2396 | extsymoff = 0; | |
2397 | } | |
2398 | else | |
2399 | { | |
2400 | locsymcount = symtab_hdr->sh_info; | |
2401 | extsymoff = symtab_hdr->sh_info; | |
2402 | } | |
2403 | ||
2404 | rel = relocs; | |
2405 | relend = relocs + input_section->reloc_count; | |
2406 | for (; rel < relend; rel++) | |
2407 | { | |
2408 | int r_type; | |
82b1edf7 | 2409 | reloc_howto_type *howto; |
aac6b32f ILT |
2410 | long r_symndx; |
2411 | bfd_vma addend; | |
2412 | struct elf_link_hash_entry *h; | |
2413 | asection *sec; | |
2414 | Elf_Internal_Sym *sym; | |
2415 | bfd_reloc_status_type r; | |
2416 | ||
2417 | r_type = ELF32_R_TYPE (rel->r_info); | |
2418 | if (r_type < 0 || r_type >= (int) R_MIPS_max) | |
6e07e54f | 2419 | { |
aac6b32f ILT |
2420 | bfd_set_error (bfd_error_bad_value); |
2421 | return false; | |
6e07e54f | 2422 | } |
aac6b32f | 2423 | howto = elf_mips_howto_table + r_type; |
b3c0fc57 | 2424 | |
aac6b32f ILT |
2425 | r_symndx = ELF32_R_SYM (rel->r_info); |
2426 | ||
2427 | /* Mix in the change in GP address for a GP relative reloc. */ | |
2428 | if (r_type != R_MIPS_GPREL16 | |
2429 | && r_type != R_MIPS_LITERAL | |
2430 | && r_type != R_MIPS_GPREL32) | |
2431 | addend = 0; | |
2432 | else | |
b3c0fc57 | 2433 | { |
aac6b32f ILT |
2434 | if (elf_gp (output_bfd) == 0) |
2435 | { | |
2436 | if (! ((*info->callbacks->reloc_dangerous) | |
2437 | (info, | |
2438 | "GP relative relocation when GP not defined", | |
2439 | input_bfd, input_section, | |
2440 | rel->r_offset))) | |
2441 | return false; | |
2442 | /* Only give the error once per link. */ | |
2443 | elf_gp (output_bfd) = 4; | |
2444 | } | |
2445 | ||
2446 | if (r_symndx < extsymoff | |
2447 | || (elf_bad_symtab (input_bfd) | |
2448 | && local_sections[r_symndx] != NULL)) | |
2449 | { | |
2450 | /* This is a relocation against a section. The current | |
2451 | addend in the instruction is the difference between | |
2452 | INPUT_SECTION->vma and the GP value of INPUT_BFD. We | |
2453 | must change this to be the difference between the | |
2454 | final definition (which will end up in RELOCATION) | |
2455 | and the GP value of OUTPUT_BFD (which is in GP). */ | |
2456 | addend = elf_gp (input_bfd) - elf_gp (output_bfd); | |
2457 | } | |
2458 | else if (! info->relocateable) | |
2459 | { | |
2460 | /* We are doing a final link. The current addend in the | |
2461 | instruction is simply the desired offset into the | |
2462 | symbol (normally zero). We want the instruction to | |
2463 | hold the difference between the final definition of | |
2464 | the symbol (which will end up in RELOCATION) and the | |
2465 | GP value of OUTPUT_BFD (which is in GP). */ | |
2466 | addend = - elf_gp (output_bfd); | |
2467 | } | |
2468 | else | |
2469 | { | |
2470 | /* We are generating relocateable output, and we aren't | |
2471 | going to define this symbol, so we just leave the | |
2472 | instruction alone. */ | |
2473 | addend = 0; | |
2474 | } | |
b3c0fc57 | 2475 | } |
b3c0fc57 | 2476 | |
aac6b32f ILT |
2477 | h = NULL; |
2478 | sym = NULL; | |
2479 | sec = NULL; | |
2480 | if (info->relocateable) | |
2481 | { | |
2482 | /* This is a relocateable link. We don't have to change | |
2483 | anything, unless the reloc is against a section symbol, | |
2484 | in which case we have to adjust according to where the | |
2485 | section symbol winds up in the output section. */ | |
2486 | if (r_symndx >= locsymcount | |
2487 | || (elf_bad_symtab (input_bfd) | |
2488 | && local_sections[r_symndx] == NULL)) | |
2489 | r = bfd_reloc_ok; | |
2490 | else | |
2491 | { | |
2492 | sym = local_syms + r_symndx; | |
2493 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) | |
2494 | r = bfd_reloc_ok; | |
2495 | else | |
2496 | { | |
2497 | sec = local_sections[r_symndx]; | |
2498 | ||
2499 | /* It would be logical to add sym->st_value here, | |
2500 | but Irix 5 sometimes generates a garbage symbol | |
2501 | value. */ | |
2502 | addend += sec->output_offset; | |
2503 | ||
2504 | /* If this is HI16 with an associated LO16, adjust | |
2505 | the addend accordingly. Otherwise, just | |
2506 | relocate. */ | |
2507 | if (r_type != R_MIPS_HI16 | |
2508 | || (rel + 1) >= relend | |
2509 | || ELF32_R_TYPE ((rel + 1)->r_info) != R_MIPS_LO16) | |
2510 | r = _bfd_relocate_contents (howto, input_bfd, | |
2511 | addend, | |
2512 | contents + rel->r_offset); | |
2513 | else | |
2514 | { | |
2515 | mips_elf_relocate_hi16 (input_bfd, rel, rel + 1, | |
2516 | contents, addend); | |
2517 | r = bfd_reloc_ok; | |
2518 | } | |
2519 | } | |
2520 | } | |
2521 | } | |
2522 | else | |
2523 | { | |
2524 | bfd_vma relocation; | |
2525 | ||
2526 | /* This is a final link. */ | |
2527 | sym = NULL; | |
2528 | if (r_symndx < extsymoff | |
2529 | || (elf_bad_symtab (input_bfd) | |
2530 | && local_sections[r_symndx] != NULL)) | |
2531 | { | |
2532 | sym = local_syms + r_symndx; | |
2533 | sec = local_sections[r_symndx]; | |
2534 | relocation = (sec->output_section->vma | |
2535 | + sec->output_offset); | |
2536 | ||
2537 | /* It would be logical to always add sym->st_value here, | |
2538 | but Irix 5 sometimes generates a garbage symbol | |
2539 | value. */ | |
2540 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) | |
2541 | relocation += sym->st_value; | |
2542 | } | |
2543 | else | |
2544 | { | |
2545 | long indx; | |
2546 | ||
2547 | indx = r_symndx - extsymoff; | |
2548 | h = elf_sym_hashes (input_bfd)[indx]; | |
2549 | if (h->root.type == bfd_link_hash_defined) | |
2550 | { | |
2551 | sec = h->root.u.def.section; | |
2552 | relocation = (h->root.u.def.value | |
2553 | + sec->output_section->vma | |
2554 | + sec->output_offset); | |
2555 | } | |
2556 | else if (h->root.type == bfd_link_hash_weak) | |
2557 | relocation = 0; | |
2558 | else | |
2559 | { | |
2560 | if (! ((*info->callbacks->undefined_symbol) | |
2561 | (info, h->root.root.string, input_bfd, | |
2562 | input_section, rel->r_offset))) | |
2563 | return false; | |
2564 | relocation = 0; | |
2565 | } | |
2566 | } | |
2567 | ||
2568 | if (r_type != R_MIPS_HI16 | |
2569 | || (rel + 1) >= relend | |
2570 | || ELF32_R_TYPE ((rel + 1)->r_info) != R_MIPS_LO16) | |
2571 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
2572 | contents, rel->r_offset, | |
2573 | relocation, addend); | |
2574 | else | |
2575 | { | |
2576 | mips_elf_relocate_hi16 (input_bfd, rel, rel + 1, | |
2577 | contents, relocation + addend); | |
2578 | r = bfd_reloc_ok; | |
2579 | } | |
2580 | } | |
2581 | ||
2582 | if (r != bfd_reloc_ok) | |
2583 | { | |
2584 | switch (r) | |
2585 | { | |
2586 | default: | |
2587 | case bfd_reloc_outofrange: | |
2588 | abort (); | |
2589 | case bfd_reloc_overflow: | |
2590 | { | |
2591 | const char *name; | |
2592 | ||
2593 | if (h != NULL) | |
2594 | name = h->root.root.string; | |
2595 | else | |
2596 | { | |
82b1edf7 KR |
2597 | name = elf_string_from_elf_section (input_bfd, |
2598 | symtab_hdr->sh_link, | |
2599 | sym->st_name); | |
aac6b32f ILT |
2600 | if (name == NULL) |
2601 | return false; | |
2602 | if (*name == '\0') | |
2603 | name = bfd_section_name (input_bfd, sec); | |
2604 | } | |
2605 | if (! ((*info->callbacks->reloc_overflow) | |
2606 | (info, name, howto->name, (bfd_vma) 0, | |
2607 | input_bfd, input_section, rel->r_offset))) | |
2608 | return false; | |
2609 | } | |
2610 | break; | |
2611 | } | |
2612 | } | |
b3c0fc57 | 2613 | } |
aac6b32f ILT |
2614 | |
2615 | return true; | |
b3c0fc57 ILT |
2616 | } |
2617 | \f | |
6e07e54f ILT |
2618 | /* ECOFF swapping routines. These are used when dealing with the |
2619 | .mdebug section, which is in the ECOFF debugging format. */ | |
2620 | static const struct ecoff_debug_swap mips_elf_ecoff_debug_swap = | |
2621 | { | |
2622 | /* Symbol table magic number. */ | |
2623 | magicSym, | |
2624 | /* Alignment of debugging information. E.g., 4. */ | |
2625 | 4, | |
2626 | /* Sizes of external symbolic information. */ | |
2627 | sizeof (struct hdr_ext), | |
2628 | sizeof (struct dnr_ext), | |
2629 | sizeof (struct pdr_ext), | |
2630 | sizeof (struct sym_ext), | |
2631 | sizeof (struct opt_ext), | |
2632 | sizeof (struct fdr_ext), | |
2633 | sizeof (struct rfd_ext), | |
2634 | sizeof (struct ext_ext), | |
2635 | /* Functions to swap in external symbolic data. */ | |
2636 | ecoff_swap_hdr_in, | |
2637 | ecoff_swap_dnr_in, | |
2638 | ecoff_swap_pdr_in, | |
2639 | ecoff_swap_sym_in, | |
2640 | ecoff_swap_opt_in, | |
2641 | ecoff_swap_fdr_in, | |
2642 | ecoff_swap_rfd_in, | |
2643 | ecoff_swap_ext_in, | |
75f3ef7a ILT |
2644 | _bfd_ecoff_swap_tir_in, |
2645 | _bfd_ecoff_swap_rndx_in, | |
6e07e54f ILT |
2646 | /* Functions to swap out external symbolic data. */ |
2647 | ecoff_swap_hdr_out, | |
2648 | ecoff_swap_dnr_out, | |
2649 | ecoff_swap_pdr_out, | |
2650 | ecoff_swap_sym_out, | |
2651 | ecoff_swap_opt_out, | |
2652 | ecoff_swap_fdr_out, | |
2653 | ecoff_swap_rfd_out, | |
aac6b32f | 2654 | ecoff_swap_ext_out, |
75f3ef7a ILT |
2655 | _bfd_ecoff_swap_tir_out, |
2656 | _bfd_ecoff_swap_rndx_out, | |
aac6b32f ILT |
2657 | /* Function to read in symbolic data. */ |
2658 | mips_elf_read_ecoff_info | |
6e07e54f ILT |
2659 | }; |
2660 | \f | |
6b4b4d17 JK |
2661 | #define TARGET_LITTLE_SYM bfd_elf32_littlemips_vec |
2662 | #define TARGET_LITTLE_NAME "elf32-littlemips" | |
2663 | #define TARGET_BIG_SYM bfd_elf32_bigmips_vec | |
2664 | #define TARGET_BIG_NAME "elf32-bigmips" | |
2665 | #define ELF_ARCH bfd_arch_mips | |
6e07e54f | 2666 | #define ELF_MACHINE_CODE EM_MIPS |
b3c0fc57 | 2667 | #define ELF_MAXPAGESIZE 0x10000 |
497c5434 | 2668 | #define elf_backend_collect true |
b3c0fc57 ILT |
2669 | #define elf_info_to_howto 0 |
2670 | #define elf_info_to_howto_rel mips_info_to_howto_rel | |
6e07e54f ILT |
2671 | #define elf_backend_sym_is_global mips_elf_sym_is_global |
2672 | #define elf_backend_object_p mips_elf_object_p | |
b3c0fc57 ILT |
2673 | #define elf_backend_section_from_shdr mips_elf_section_from_shdr |
2674 | #define elf_backend_fake_sections mips_elf_fake_sections | |
2675 | #define elf_backend_section_from_bfd_section \ | |
2676 | mips_elf_section_from_bfd_section | |
2677 | #define elf_backend_section_processing mips_elf_section_processing | |
2678 | #define elf_backend_symbol_processing mips_elf_symbol_processing | |
6e07e54f ILT |
2679 | #define elf_backend_final_write_processing \ |
2680 | mips_elf_final_write_processing | |
2681 | #define elf_backend_ecoff_debug_swap &mips_elf_ecoff_debug_swap | |
b3c0fc57 | 2682 | |
aac6b32f ILT |
2683 | #define bfd_elf32_bfd_link_hash_table_create \ |
2684 | mips_elf_link_hash_table_create | |
6e07e54f | 2685 | #define bfd_elf32_bfd_final_link mips_elf_final_link |
aac6b32f ILT |
2686 | #define elf_backend_relocate_section mips_elf_relocate_section |
2687 | #define elf_backend_add_symbol_hook mips_elf_add_symbol_hook | |
6b4b4d17 JK |
2688 | |
2689 | #include "elf32-target.h" |