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252b5132 | 1 | /* 32-bit ELF support for ARM |
d1f161ea NC |
2 | Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004 |
3 | Free Software Foundation, Inc. | |
252b5132 RH |
4 | |
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
20 | ||
7f266840 DJ |
21 | #include "elf/arm.h" |
22 | #include "bfd.h" | |
23 | #include "sysdep.h" | |
24 | #include "libbfd.h" | |
25 | #include "elf-bfd.h" | |
26 | ||
27 | #ifndef NUM_ELEM | |
28 | #define NUM_ELEM(a) (sizeof (a) / (sizeof (a)[0])) | |
29 | #endif | |
30 | ||
31 | #define USE_REL 1 | |
32 | ||
33 | #define elf_info_to_howto 0 | |
34 | #define elf_info_to_howto_rel elf32_arm_info_to_howto | |
35 | ||
36 | #define ARM_ELF_ABI_VERSION 0 | |
37 | #define ARM_ELF_OS_ABI_VERSION ELFOSABI_ARM | |
38 | ||
39 | static reloc_howto_type * elf32_arm_reloc_type_lookup | |
40 | PARAMS ((bfd * abfd, bfd_reloc_code_real_type code)); | |
41 | static bfd_boolean elf32_arm_nabi_grok_prstatus | |
42 | PARAMS ((bfd *abfd, Elf_Internal_Note *note)); | |
43 | static bfd_boolean elf32_arm_nabi_grok_psinfo | |
44 | PARAMS ((bfd *abfd, Elf_Internal_Note *note)); | |
45 | ||
46 | /* Note: code such as elf32_arm_reloc_type_lookup expect to use e.g. | |
47 | R_ARM_PC24 as an index into this, and find the R_ARM_PC24 HOWTO | |
48 | in that slot. */ | |
49 | ||
50 | static reloc_howto_type elf32_arm_howto_table[] = | |
51 | { | |
52 | /* No relocation */ | |
53 | HOWTO (R_ARM_NONE, /* type */ | |
54 | 0, /* rightshift */ | |
55 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
56 | 0, /* bitsize */ | |
57 | FALSE, /* pc_relative */ | |
58 | 0, /* bitpos */ | |
59 | complain_overflow_dont,/* complain_on_overflow */ | |
60 | bfd_elf_generic_reloc, /* special_function */ | |
61 | "R_ARM_NONE", /* name */ | |
62 | FALSE, /* partial_inplace */ | |
63 | 0, /* src_mask */ | |
64 | 0, /* dst_mask */ | |
65 | FALSE), /* pcrel_offset */ | |
66 | ||
67 | HOWTO (R_ARM_PC24, /* type */ | |
68 | 2, /* rightshift */ | |
69 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
70 | 24, /* bitsize */ | |
71 | TRUE, /* pc_relative */ | |
72 | 0, /* bitpos */ | |
73 | complain_overflow_signed,/* complain_on_overflow */ | |
74 | bfd_elf_generic_reloc, /* special_function */ | |
75 | "R_ARM_PC24", /* name */ | |
76 | FALSE, /* partial_inplace */ | |
77 | 0x00ffffff, /* src_mask */ | |
78 | 0x00ffffff, /* dst_mask */ | |
79 | TRUE), /* pcrel_offset */ | |
80 | ||
81 | /* 32 bit absolute */ | |
82 | HOWTO (R_ARM_ABS32, /* type */ | |
83 | 0, /* rightshift */ | |
84 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
85 | 32, /* bitsize */ | |
86 | FALSE, /* pc_relative */ | |
87 | 0, /* bitpos */ | |
88 | complain_overflow_bitfield,/* complain_on_overflow */ | |
89 | bfd_elf_generic_reloc, /* special_function */ | |
90 | "R_ARM_ABS32", /* name */ | |
91 | FALSE, /* partial_inplace */ | |
92 | 0xffffffff, /* src_mask */ | |
93 | 0xffffffff, /* dst_mask */ | |
94 | FALSE), /* pcrel_offset */ | |
95 | ||
96 | /* standard 32bit pc-relative reloc */ | |
97 | HOWTO (R_ARM_REL32, /* type */ | |
98 | 0, /* rightshift */ | |
99 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
100 | 32, /* bitsize */ | |
101 | TRUE, /* pc_relative */ | |
102 | 0, /* bitpos */ | |
103 | complain_overflow_bitfield,/* complain_on_overflow */ | |
104 | bfd_elf_generic_reloc, /* special_function */ | |
105 | "R_ARM_REL32", /* name */ | |
106 | FALSE, /* partial_inplace */ | |
107 | 0xffffffff, /* src_mask */ | |
108 | 0xffffffff, /* dst_mask */ | |
109 | TRUE), /* pcrel_offset */ | |
110 | ||
111 | /* 8 bit absolute */ | |
112 | HOWTO (R_ARM_PC13, /* type */ | |
113 | 0, /* rightshift */ | |
114 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
115 | 8, /* bitsize */ | |
116 | FALSE, /* pc_relative */ | |
117 | 0, /* bitpos */ | |
118 | complain_overflow_bitfield,/* complain_on_overflow */ | |
119 | bfd_elf_generic_reloc, /* special_function */ | |
120 | "R_ARM_PC13", /* name */ | |
121 | FALSE, /* partial_inplace */ | |
122 | 0x000000ff, /* src_mask */ | |
123 | 0x000000ff, /* dst_mask */ | |
124 | FALSE), /* pcrel_offset */ | |
125 | ||
126 | /* 16 bit absolute */ | |
127 | HOWTO (R_ARM_ABS16, /* type */ | |
128 | 0, /* rightshift */ | |
129 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
130 | 16, /* bitsize */ | |
131 | FALSE, /* pc_relative */ | |
132 | 0, /* bitpos */ | |
133 | complain_overflow_bitfield,/* complain_on_overflow */ | |
134 | bfd_elf_generic_reloc, /* special_function */ | |
135 | "R_ARM_ABS16", /* name */ | |
136 | FALSE, /* partial_inplace */ | |
137 | 0x0000ffff, /* src_mask */ | |
138 | 0x0000ffff, /* dst_mask */ | |
139 | FALSE), /* pcrel_offset */ | |
140 | ||
141 | /* 12 bit absolute */ | |
142 | HOWTO (R_ARM_ABS12, /* type */ | |
143 | 0, /* rightshift */ | |
144 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
145 | 12, /* bitsize */ | |
146 | FALSE, /* pc_relative */ | |
147 | 0, /* bitpos */ | |
148 | complain_overflow_bitfield,/* complain_on_overflow */ | |
149 | bfd_elf_generic_reloc, /* special_function */ | |
150 | "R_ARM_ABS12", /* name */ | |
151 | FALSE, /* partial_inplace */ | |
152 | 0x000008ff, /* src_mask */ | |
153 | 0x000008ff, /* dst_mask */ | |
154 | FALSE), /* pcrel_offset */ | |
155 | ||
156 | HOWTO (R_ARM_THM_ABS5, /* type */ | |
157 | 6, /* rightshift */ | |
158 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
159 | 5, /* bitsize */ | |
160 | FALSE, /* pc_relative */ | |
161 | 0, /* bitpos */ | |
162 | complain_overflow_bitfield,/* complain_on_overflow */ | |
163 | bfd_elf_generic_reloc, /* special_function */ | |
164 | "R_ARM_THM_ABS5", /* name */ | |
165 | FALSE, /* partial_inplace */ | |
166 | 0x000007e0, /* src_mask */ | |
167 | 0x000007e0, /* dst_mask */ | |
168 | FALSE), /* pcrel_offset */ | |
169 | ||
170 | /* 8 bit absolute */ | |
171 | HOWTO (R_ARM_ABS8, /* type */ | |
172 | 0, /* rightshift */ | |
173 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
174 | 8, /* bitsize */ | |
175 | FALSE, /* pc_relative */ | |
176 | 0, /* bitpos */ | |
177 | complain_overflow_bitfield,/* complain_on_overflow */ | |
178 | bfd_elf_generic_reloc, /* special_function */ | |
179 | "R_ARM_ABS8", /* name */ | |
180 | FALSE, /* partial_inplace */ | |
181 | 0x000000ff, /* src_mask */ | |
182 | 0x000000ff, /* dst_mask */ | |
183 | FALSE), /* pcrel_offset */ | |
184 | ||
185 | HOWTO (R_ARM_SBREL32, /* type */ | |
186 | 0, /* rightshift */ | |
187 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
188 | 32, /* bitsize */ | |
189 | FALSE, /* pc_relative */ | |
190 | 0, /* bitpos */ | |
191 | complain_overflow_dont,/* complain_on_overflow */ | |
192 | bfd_elf_generic_reloc, /* special_function */ | |
193 | "R_ARM_SBREL32", /* name */ | |
194 | FALSE, /* partial_inplace */ | |
195 | 0xffffffff, /* src_mask */ | |
196 | 0xffffffff, /* dst_mask */ | |
197 | FALSE), /* pcrel_offset */ | |
198 | ||
199 | HOWTO (R_ARM_THM_PC22, /* type */ | |
200 | 1, /* rightshift */ | |
201 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
202 | 23, /* bitsize */ | |
203 | TRUE, /* pc_relative */ | |
204 | 0, /* bitpos */ | |
205 | complain_overflow_signed,/* complain_on_overflow */ | |
206 | bfd_elf_generic_reloc, /* special_function */ | |
207 | "R_ARM_THM_PC22", /* name */ | |
208 | FALSE, /* partial_inplace */ | |
209 | 0x07ff07ff, /* src_mask */ | |
210 | 0x07ff07ff, /* dst_mask */ | |
211 | TRUE), /* pcrel_offset */ | |
212 | ||
213 | HOWTO (R_ARM_THM_PC8, /* type */ | |
214 | 1, /* rightshift */ | |
215 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
216 | 8, /* bitsize */ | |
217 | TRUE, /* pc_relative */ | |
218 | 0, /* bitpos */ | |
219 | complain_overflow_signed,/* complain_on_overflow */ | |
220 | bfd_elf_generic_reloc, /* special_function */ | |
221 | "R_ARM_THM_PC8", /* name */ | |
222 | FALSE, /* partial_inplace */ | |
223 | 0x000000ff, /* src_mask */ | |
224 | 0x000000ff, /* dst_mask */ | |
225 | TRUE), /* pcrel_offset */ | |
226 | ||
227 | HOWTO (R_ARM_AMP_VCALL9, /* type */ | |
228 | 1, /* rightshift */ | |
229 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
230 | 8, /* bitsize */ | |
231 | TRUE, /* pc_relative */ | |
232 | 0, /* bitpos */ | |
233 | complain_overflow_signed,/* complain_on_overflow */ | |
234 | bfd_elf_generic_reloc, /* special_function */ | |
235 | "R_ARM_AMP_VCALL9", /* name */ | |
236 | FALSE, /* partial_inplace */ | |
237 | 0x000000ff, /* src_mask */ | |
238 | 0x000000ff, /* dst_mask */ | |
239 | TRUE), /* pcrel_offset */ | |
240 | ||
241 | HOWTO (R_ARM_SWI24, /* type */ | |
242 | 0, /* rightshift */ | |
243 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
244 | 0, /* bitsize */ | |
245 | FALSE, /* pc_relative */ | |
246 | 0, /* bitpos */ | |
247 | complain_overflow_signed,/* complain_on_overflow */ | |
248 | bfd_elf_generic_reloc, /* special_function */ | |
249 | "R_ARM_SWI24", /* name */ | |
250 | FALSE, /* partial_inplace */ | |
251 | 0x00000000, /* src_mask */ | |
252 | 0x00000000, /* dst_mask */ | |
253 | FALSE), /* pcrel_offset */ | |
254 | ||
255 | HOWTO (R_ARM_THM_SWI8, /* type */ | |
256 | 0, /* rightshift */ | |
257 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
258 | 0, /* bitsize */ | |
259 | FALSE, /* pc_relative */ | |
260 | 0, /* bitpos */ | |
261 | complain_overflow_signed,/* complain_on_overflow */ | |
262 | bfd_elf_generic_reloc, /* special_function */ | |
263 | "R_ARM_SWI8", /* name */ | |
264 | FALSE, /* partial_inplace */ | |
265 | 0x00000000, /* src_mask */ | |
266 | 0x00000000, /* dst_mask */ | |
267 | FALSE), /* pcrel_offset */ | |
268 | ||
269 | /* BLX instruction for the ARM. */ | |
270 | HOWTO (R_ARM_XPC25, /* type */ | |
271 | 2, /* rightshift */ | |
272 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
273 | 25, /* bitsize */ | |
274 | TRUE, /* pc_relative */ | |
275 | 0, /* bitpos */ | |
276 | complain_overflow_signed,/* complain_on_overflow */ | |
277 | bfd_elf_generic_reloc, /* special_function */ | |
278 | "R_ARM_XPC25", /* name */ | |
279 | FALSE, /* partial_inplace */ | |
280 | 0x00ffffff, /* src_mask */ | |
281 | 0x00ffffff, /* dst_mask */ | |
282 | TRUE), /* pcrel_offset */ | |
283 | ||
284 | /* BLX instruction for the Thumb. */ | |
285 | HOWTO (R_ARM_THM_XPC22, /* type */ | |
286 | 2, /* rightshift */ | |
287 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
288 | 22, /* bitsize */ | |
289 | TRUE, /* pc_relative */ | |
290 | 0, /* bitpos */ | |
291 | complain_overflow_signed,/* complain_on_overflow */ | |
292 | bfd_elf_generic_reloc, /* special_function */ | |
293 | "R_ARM_THM_XPC22", /* name */ | |
294 | FALSE, /* partial_inplace */ | |
295 | 0x07ff07ff, /* src_mask */ | |
296 | 0x07ff07ff, /* dst_mask */ | |
297 | TRUE), /* pcrel_offset */ | |
298 | ||
299 | /* These next three relocs are not defined, but we need to fill the space. */ | |
300 | ||
301 | HOWTO (R_ARM_NONE, /* type */ | |
302 | 0, /* rightshift */ | |
303 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
304 | 0, /* bitsize */ | |
305 | FALSE, /* pc_relative */ | |
306 | 0, /* bitpos */ | |
307 | complain_overflow_dont,/* complain_on_overflow */ | |
308 | bfd_elf_generic_reloc, /* special_function */ | |
309 | "R_ARM_unknown_17", /* name */ | |
310 | FALSE, /* partial_inplace */ | |
311 | 0, /* src_mask */ | |
312 | 0, /* dst_mask */ | |
313 | FALSE), /* pcrel_offset */ | |
314 | ||
315 | HOWTO (R_ARM_NONE, /* type */ | |
316 | 0, /* rightshift */ | |
317 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
318 | 0, /* bitsize */ | |
319 | FALSE, /* pc_relative */ | |
320 | 0, /* bitpos */ | |
321 | complain_overflow_dont,/* complain_on_overflow */ | |
322 | bfd_elf_generic_reloc, /* special_function */ | |
323 | "R_ARM_unknown_18", /* name */ | |
324 | FALSE, /* partial_inplace */ | |
325 | 0, /* src_mask */ | |
326 | 0, /* dst_mask */ | |
327 | FALSE), /* pcrel_offset */ | |
328 | ||
329 | HOWTO (R_ARM_NONE, /* type */ | |
330 | 0, /* rightshift */ | |
331 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
332 | 0, /* bitsize */ | |
333 | FALSE, /* pc_relative */ | |
334 | 0, /* bitpos */ | |
335 | complain_overflow_dont,/* complain_on_overflow */ | |
336 | bfd_elf_generic_reloc, /* special_function */ | |
337 | "R_ARM_unknown_19", /* name */ | |
338 | FALSE, /* partial_inplace */ | |
339 | 0, /* src_mask */ | |
340 | 0, /* dst_mask */ | |
341 | FALSE), /* pcrel_offset */ | |
342 | ||
343 | /* Relocs used in ARM Linux */ | |
344 | ||
345 | HOWTO (R_ARM_COPY, /* type */ | |
346 | 0, /* rightshift */ | |
347 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
348 | 32, /* bitsize */ | |
349 | FALSE, /* pc_relative */ | |
350 | 0, /* bitpos */ | |
351 | complain_overflow_bitfield,/* complain_on_overflow */ | |
352 | bfd_elf_generic_reloc, /* special_function */ | |
353 | "R_ARM_COPY", /* name */ | |
354 | TRUE, /* partial_inplace */ | |
355 | 0xffffffff, /* src_mask */ | |
356 | 0xffffffff, /* dst_mask */ | |
357 | FALSE), /* pcrel_offset */ | |
358 | ||
359 | HOWTO (R_ARM_GLOB_DAT, /* type */ | |
360 | 0, /* rightshift */ | |
361 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
362 | 32, /* bitsize */ | |
363 | FALSE, /* pc_relative */ | |
364 | 0, /* bitpos */ | |
365 | complain_overflow_bitfield,/* complain_on_overflow */ | |
366 | bfd_elf_generic_reloc, /* special_function */ | |
367 | "R_ARM_GLOB_DAT", /* name */ | |
368 | TRUE, /* partial_inplace */ | |
369 | 0xffffffff, /* src_mask */ | |
370 | 0xffffffff, /* dst_mask */ | |
371 | FALSE), /* pcrel_offset */ | |
372 | ||
373 | HOWTO (R_ARM_JUMP_SLOT, /* type */ | |
374 | 0, /* rightshift */ | |
375 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
376 | 32, /* bitsize */ | |
377 | FALSE, /* pc_relative */ | |
378 | 0, /* bitpos */ | |
379 | complain_overflow_bitfield,/* complain_on_overflow */ | |
380 | bfd_elf_generic_reloc, /* special_function */ | |
381 | "R_ARM_JUMP_SLOT", /* name */ | |
382 | TRUE, /* partial_inplace */ | |
383 | 0xffffffff, /* src_mask */ | |
384 | 0xffffffff, /* dst_mask */ | |
385 | FALSE), /* pcrel_offset */ | |
386 | ||
387 | HOWTO (R_ARM_RELATIVE, /* type */ | |
388 | 0, /* rightshift */ | |
389 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
390 | 32, /* bitsize */ | |
391 | FALSE, /* pc_relative */ | |
392 | 0, /* bitpos */ | |
393 | complain_overflow_bitfield,/* complain_on_overflow */ | |
394 | bfd_elf_generic_reloc, /* special_function */ | |
395 | "R_ARM_RELATIVE", /* name */ | |
396 | TRUE, /* partial_inplace */ | |
397 | 0xffffffff, /* src_mask */ | |
398 | 0xffffffff, /* dst_mask */ | |
399 | FALSE), /* pcrel_offset */ | |
400 | ||
401 | HOWTO (R_ARM_GOTOFF, /* type */ | |
402 | 0, /* rightshift */ | |
403 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
404 | 32, /* bitsize */ | |
405 | FALSE, /* pc_relative */ | |
406 | 0, /* bitpos */ | |
407 | complain_overflow_bitfield,/* complain_on_overflow */ | |
408 | bfd_elf_generic_reloc, /* special_function */ | |
409 | "R_ARM_GOTOFF", /* name */ | |
410 | TRUE, /* partial_inplace */ | |
411 | 0xffffffff, /* src_mask */ | |
412 | 0xffffffff, /* dst_mask */ | |
413 | FALSE), /* pcrel_offset */ | |
414 | ||
415 | HOWTO (R_ARM_GOTPC, /* type */ | |
416 | 0, /* rightshift */ | |
417 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
418 | 32, /* bitsize */ | |
419 | TRUE, /* pc_relative */ | |
420 | 0, /* bitpos */ | |
421 | complain_overflow_bitfield,/* complain_on_overflow */ | |
422 | bfd_elf_generic_reloc, /* special_function */ | |
423 | "R_ARM_GOTPC", /* name */ | |
424 | TRUE, /* partial_inplace */ | |
425 | 0xffffffff, /* src_mask */ | |
426 | 0xffffffff, /* dst_mask */ | |
427 | TRUE), /* pcrel_offset */ | |
428 | ||
429 | HOWTO (R_ARM_GOT32, /* type */ | |
430 | 0, /* rightshift */ | |
431 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
432 | 32, /* bitsize */ | |
433 | FALSE, /* pc_relative */ | |
434 | 0, /* bitpos */ | |
435 | complain_overflow_bitfield,/* complain_on_overflow */ | |
436 | bfd_elf_generic_reloc, /* special_function */ | |
437 | "R_ARM_GOT32", /* name */ | |
438 | TRUE, /* partial_inplace */ | |
439 | 0xffffffff, /* src_mask */ | |
440 | 0xffffffff, /* dst_mask */ | |
441 | FALSE), /* pcrel_offset */ | |
442 | ||
443 | HOWTO (R_ARM_PLT32, /* type */ | |
444 | 2, /* rightshift */ | |
445 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
446 | 26, /* bitsize */ | |
447 | TRUE, /* pc_relative */ | |
448 | 0, /* bitpos */ | |
449 | complain_overflow_bitfield,/* complain_on_overflow */ | |
450 | bfd_elf_generic_reloc, /* special_function */ | |
451 | "R_ARM_PLT32", /* name */ | |
452 | TRUE, /* partial_inplace */ | |
453 | 0x00ffffff, /* src_mask */ | |
454 | 0x00ffffff, /* dst_mask */ | |
455 | TRUE), /* pcrel_offset */ | |
456 | ||
457 | HOWTO (R_ARM_CALL, /* type */ | |
458 | 2, /* rightshift */ | |
459 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
460 | 24, /* bitsize */ | |
461 | TRUE, /* pc_relative */ | |
462 | 0, /* bitpos */ | |
463 | complain_overflow_signed,/* complain_on_overflow */ | |
464 | bfd_elf_generic_reloc, /* special_function */ | |
465 | "R_ARM_CALL", /* name */ | |
466 | FALSE, /* partial_inplace */ | |
467 | 0x00ffffff, /* src_mask */ | |
468 | 0x00ffffff, /* dst_mask */ | |
469 | TRUE), /* pcrel_offset */ | |
470 | ||
471 | HOWTO (R_ARM_JUMP24, /* type */ | |
472 | 2, /* rightshift */ | |
473 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
474 | 24, /* bitsize */ | |
475 | TRUE, /* pc_relative */ | |
476 | 0, /* bitpos */ | |
477 | complain_overflow_signed,/* complain_on_overflow */ | |
478 | bfd_elf_generic_reloc, /* special_function */ | |
479 | "R_ARM_JUMP24", /* name */ | |
480 | FALSE, /* partial_inplace */ | |
481 | 0x00ffffff, /* src_mask */ | |
482 | 0x00ffffff, /* dst_mask */ | |
483 | TRUE), /* pcrel_offset */ | |
484 | ||
485 | HOWTO (R_ARM_NONE, /* type */ | |
486 | 0, /* rightshift */ | |
487 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
488 | 0, /* bitsize */ | |
489 | FALSE, /* pc_relative */ | |
490 | 0, /* bitpos */ | |
491 | complain_overflow_dont,/* complain_on_overflow */ | |
492 | bfd_elf_generic_reloc, /* special_function */ | |
493 | "R_ARM_unknown_30", /* name */ | |
494 | FALSE, /* partial_inplace */ | |
495 | 0, /* src_mask */ | |
496 | 0, /* dst_mask */ | |
497 | FALSE), /* pcrel_offset */ | |
498 | ||
499 | HOWTO (R_ARM_NONE, /* type */ | |
500 | 0, /* rightshift */ | |
501 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
502 | 0, /* bitsize */ | |
503 | FALSE, /* pc_relative */ | |
504 | 0, /* bitpos */ | |
505 | complain_overflow_dont,/* complain_on_overflow */ | |
506 | bfd_elf_generic_reloc, /* special_function */ | |
507 | "R_ARM_unknown_31", /* name */ | |
508 | FALSE, /* partial_inplace */ | |
509 | 0, /* src_mask */ | |
510 | 0, /* dst_mask */ | |
511 | FALSE), /* pcrel_offset */ | |
512 | ||
513 | HOWTO (R_ARM_ALU_PCREL7_0, /* type */ | |
514 | 0, /* rightshift */ | |
515 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
516 | 12, /* bitsize */ | |
517 | TRUE, /* pc_relative */ | |
518 | 0, /* bitpos */ | |
519 | complain_overflow_dont,/* complain_on_overflow */ | |
520 | bfd_elf_generic_reloc, /* special_function */ | |
521 | "R_ARM_ALU_PCREL_7_0", /* name */ | |
522 | FALSE, /* partial_inplace */ | |
523 | 0x00000fff, /* src_mask */ | |
524 | 0x00000fff, /* dst_mask */ | |
525 | TRUE), /* pcrel_offset */ | |
526 | ||
527 | HOWTO (R_ARM_ALU_PCREL15_8, /* type */ | |
528 | 0, /* rightshift */ | |
529 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
530 | 12, /* bitsize */ | |
531 | TRUE, /* pc_relative */ | |
532 | 8, /* bitpos */ | |
533 | complain_overflow_dont,/* complain_on_overflow */ | |
534 | bfd_elf_generic_reloc, /* special_function */ | |
535 | "R_ARM_ALU_PCREL_15_8",/* name */ | |
536 | FALSE, /* partial_inplace */ | |
537 | 0x00000fff, /* src_mask */ | |
538 | 0x00000fff, /* dst_mask */ | |
539 | TRUE), /* pcrel_offset */ | |
540 | ||
541 | HOWTO (R_ARM_ALU_PCREL23_15, /* type */ | |
542 | 0, /* rightshift */ | |
543 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
544 | 12, /* bitsize */ | |
545 | TRUE, /* pc_relative */ | |
546 | 16, /* bitpos */ | |
547 | complain_overflow_dont,/* complain_on_overflow */ | |
548 | bfd_elf_generic_reloc, /* special_function */ | |
549 | "R_ARM_ALU_PCREL_23_15",/* name */ | |
550 | FALSE, /* partial_inplace */ | |
551 | 0x00000fff, /* src_mask */ | |
552 | 0x00000fff, /* dst_mask */ | |
553 | TRUE), /* pcrel_offset */ | |
554 | ||
555 | HOWTO (R_ARM_LDR_SBREL_11_0, /* type */ | |
556 | 0, /* rightshift */ | |
557 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
558 | 12, /* bitsize */ | |
559 | FALSE, /* pc_relative */ | |
560 | 0, /* bitpos */ | |
561 | complain_overflow_dont,/* complain_on_overflow */ | |
562 | bfd_elf_generic_reloc, /* special_function */ | |
563 | "R_ARM_LDR_SBREL_11_0",/* name */ | |
564 | FALSE, /* partial_inplace */ | |
565 | 0x00000fff, /* src_mask */ | |
566 | 0x00000fff, /* dst_mask */ | |
567 | FALSE), /* pcrel_offset */ | |
568 | ||
569 | HOWTO (R_ARM_ALU_SBREL_19_12, /* type */ | |
570 | 0, /* rightshift */ | |
571 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
572 | 8, /* bitsize */ | |
573 | FALSE, /* pc_relative */ | |
574 | 12, /* bitpos */ | |
575 | complain_overflow_dont,/* complain_on_overflow */ | |
576 | bfd_elf_generic_reloc, /* special_function */ | |
577 | "R_ARM_ALU_SBREL_19_12",/* name */ | |
578 | FALSE, /* partial_inplace */ | |
579 | 0x000ff000, /* src_mask */ | |
580 | 0x000ff000, /* dst_mask */ | |
581 | FALSE), /* pcrel_offset */ | |
582 | ||
583 | HOWTO (R_ARM_ALU_SBREL_27_20, /* type */ | |
584 | 0, /* rightshift */ | |
585 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
586 | 8, /* bitsize */ | |
587 | FALSE, /* pc_relative */ | |
588 | 20, /* bitpos */ | |
589 | complain_overflow_dont,/* complain_on_overflow */ | |
590 | bfd_elf_generic_reloc, /* special_function */ | |
591 | "R_ARM_ALU_SBREL_27_20",/* name */ | |
592 | FALSE, /* partial_inplace */ | |
593 | 0x0ff00000, /* src_mask */ | |
594 | 0x0ff00000, /* dst_mask */ | |
595 | FALSE), /* pcrel_offset */ | |
596 | ||
597 | HOWTO (R_ARM_TARGET1, /* type */ | |
598 | 0, /* rightshift */ | |
599 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
600 | 32, /* bitsize */ | |
601 | FALSE, /* pc_relative */ | |
602 | 0, /* bitpos */ | |
603 | complain_overflow_dont,/* complain_on_overflow */ | |
604 | bfd_elf_generic_reloc, /* special_function */ | |
605 | "R_ARM_TARGET1", /* name */ | |
606 | FALSE, /* partial_inplace */ | |
607 | 0xffffffff, /* src_mask */ | |
608 | 0xffffffff, /* dst_mask */ | |
609 | FALSE), /* pcrel_offset */ | |
610 | ||
611 | HOWTO (R_ARM_ROSEGREL32, /* type */ | |
612 | 0, /* rightshift */ | |
613 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
614 | 32, /* bitsize */ | |
615 | FALSE, /* pc_relative */ | |
616 | 0, /* bitpos */ | |
617 | complain_overflow_dont,/* complain_on_overflow */ | |
618 | bfd_elf_generic_reloc, /* special_function */ | |
619 | "R_ARM_ROSEGREL32", /* name */ | |
620 | FALSE, /* partial_inplace */ | |
621 | 0xffffffff, /* src_mask */ | |
622 | 0xffffffff, /* dst_mask */ | |
623 | FALSE), /* pcrel_offset */ | |
624 | ||
625 | HOWTO (R_ARM_V4BX, /* type */ | |
626 | 0, /* rightshift */ | |
627 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
628 | 32, /* bitsize */ | |
629 | FALSE, /* pc_relative */ | |
630 | 0, /* bitpos */ | |
631 | complain_overflow_dont,/* complain_on_overflow */ | |
632 | bfd_elf_generic_reloc, /* special_function */ | |
633 | "R_ARM_V4BX", /* name */ | |
634 | FALSE, /* partial_inplace */ | |
635 | 0xffffffff, /* src_mask */ | |
636 | 0xffffffff, /* dst_mask */ | |
637 | FALSE), /* pcrel_offset */ | |
638 | ||
639 | HOWTO (R_ARM_TARGET2, /* type */ | |
640 | 0, /* rightshift */ | |
641 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
642 | 32, /* bitsize */ | |
643 | FALSE, /* pc_relative */ | |
644 | 0, /* bitpos */ | |
645 | complain_overflow_signed,/* complain_on_overflow */ | |
646 | bfd_elf_generic_reloc, /* special_function */ | |
647 | "R_ARM_TARGET2", /* name */ | |
648 | FALSE, /* partial_inplace */ | |
649 | 0xffffffff, /* src_mask */ | |
650 | 0xffffffff, /* dst_mask */ | |
651 | TRUE), /* pcrel_offset */ | |
652 | ||
653 | HOWTO (R_ARM_PREL31, /* type */ | |
654 | 0, /* rightshift */ | |
655 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
656 | 31, /* bitsize */ | |
657 | TRUE, /* pc_relative */ | |
658 | 0, /* bitpos */ | |
659 | complain_overflow_signed,/* complain_on_overflow */ | |
660 | bfd_elf_generic_reloc, /* special_function */ | |
661 | "R_ARM_PREL31", /* name */ | |
662 | FALSE, /* partial_inplace */ | |
663 | 0x7fffffff, /* src_mask */ | |
664 | 0x7fffffff, /* dst_mask */ | |
665 | TRUE), /* pcrel_offset */ | |
666 | }; | |
667 | ||
668 | /* GNU extension to record C++ vtable hierarchy */ | |
669 | static reloc_howto_type elf32_arm_vtinherit_howto = | |
670 | HOWTO (R_ARM_GNU_VTINHERIT, /* type */ | |
671 | 0, /* rightshift */ | |
672 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
673 | 0, /* bitsize */ | |
674 | FALSE, /* pc_relative */ | |
675 | 0, /* bitpos */ | |
676 | complain_overflow_dont, /* complain_on_overflow */ | |
677 | NULL, /* special_function */ | |
678 | "R_ARM_GNU_VTINHERIT", /* name */ | |
679 | FALSE, /* partial_inplace */ | |
680 | 0, /* src_mask */ | |
681 | 0, /* dst_mask */ | |
682 | FALSE); /* pcrel_offset */ | |
683 | ||
684 | /* GNU extension to record C++ vtable member usage */ | |
685 | static reloc_howto_type elf32_arm_vtentry_howto = | |
686 | HOWTO (R_ARM_GNU_VTENTRY, /* type */ | |
687 | 0, /* rightshift */ | |
688 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
689 | 0, /* bitsize */ | |
690 | FALSE, /* pc_relative */ | |
691 | 0, /* bitpos */ | |
692 | complain_overflow_dont, /* complain_on_overflow */ | |
693 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
694 | "R_ARM_GNU_VTENTRY", /* name */ | |
695 | FALSE, /* partial_inplace */ | |
696 | 0, /* src_mask */ | |
697 | 0, /* dst_mask */ | |
698 | FALSE); /* pcrel_offset */ | |
699 | ||
700 | /* 12 bit pc relative */ | |
701 | static reloc_howto_type elf32_arm_thm_pc11_howto = | |
702 | HOWTO (R_ARM_THM_PC11, /* type */ | |
703 | 1, /* rightshift */ | |
704 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
705 | 11, /* bitsize */ | |
706 | TRUE, /* pc_relative */ | |
707 | 0, /* bitpos */ | |
708 | complain_overflow_signed, /* complain_on_overflow */ | |
709 | bfd_elf_generic_reloc, /* special_function */ | |
710 | "R_ARM_THM_PC11", /* name */ | |
711 | FALSE, /* partial_inplace */ | |
712 | 0x000007ff, /* src_mask */ | |
713 | 0x000007ff, /* dst_mask */ | |
714 | TRUE); /* pcrel_offset */ | |
715 | ||
716 | /* 12 bit pc relative */ | |
717 | static reloc_howto_type elf32_arm_thm_pc9_howto = | |
718 | HOWTO (R_ARM_THM_PC9, /* type */ | |
719 | 1, /* rightshift */ | |
720 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
721 | 8, /* bitsize */ | |
722 | TRUE, /* pc_relative */ | |
723 | 0, /* bitpos */ | |
724 | complain_overflow_signed, /* complain_on_overflow */ | |
725 | bfd_elf_generic_reloc, /* special_function */ | |
726 | "R_ARM_THM_PC9", /* name */ | |
727 | FALSE, /* partial_inplace */ | |
728 | 0x000000ff, /* src_mask */ | |
729 | 0x000000ff, /* dst_mask */ | |
730 | TRUE); /* pcrel_offset */ | |
731 | ||
732 | /* Place relative GOT-indirect. */ | |
733 | static reloc_howto_type elf32_arm_got_prel = | |
734 | HOWTO (R_ARM_GOT_PREL, /* type */ | |
735 | 0, /* rightshift */ | |
736 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
737 | 32, /* bitsize */ | |
738 | TRUE, /* pc_relative */ | |
739 | 0, /* bitpos */ | |
740 | complain_overflow_dont, /* complain_on_overflow */ | |
741 | bfd_elf_generic_reloc, /* special_function */ | |
742 | "R_ARM_GOT_PREL", /* name */ | |
743 | FALSE, /* partial_inplace */ | |
744 | 0xffffffff, /* src_mask */ | |
745 | 0xffffffff, /* dst_mask */ | |
746 | TRUE); /* pcrel_offset */ | |
747 | ||
748 | /* Currently unused relocations. */ | |
749 | static reloc_howto_type elf32_arm_r_howto[4] = | |
750 | { | |
751 | HOWTO (R_ARM_RREL32, /* type */ | |
752 | 0, /* rightshift */ | |
753 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
754 | 0, /* bitsize */ | |
755 | FALSE, /* pc_relative */ | |
756 | 0, /* bitpos */ | |
757 | complain_overflow_dont,/* complain_on_overflow */ | |
758 | bfd_elf_generic_reloc, /* special_function */ | |
759 | "R_ARM_RREL32", /* name */ | |
760 | FALSE, /* partial_inplace */ | |
761 | 0, /* src_mask */ | |
762 | 0, /* dst_mask */ | |
763 | FALSE), /* pcrel_offset */ | |
764 | ||
765 | HOWTO (R_ARM_RABS32, /* type */ | |
766 | 0, /* rightshift */ | |
767 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
768 | 0, /* bitsize */ | |
769 | FALSE, /* pc_relative */ | |
770 | 0, /* bitpos */ | |
771 | complain_overflow_dont,/* complain_on_overflow */ | |
772 | bfd_elf_generic_reloc, /* special_function */ | |
773 | "R_ARM_RABS32", /* name */ | |
774 | FALSE, /* partial_inplace */ | |
775 | 0, /* src_mask */ | |
776 | 0, /* dst_mask */ | |
777 | FALSE), /* pcrel_offset */ | |
778 | ||
779 | HOWTO (R_ARM_RPC24, /* type */ | |
780 | 0, /* rightshift */ | |
781 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
782 | 0, /* bitsize */ | |
783 | FALSE, /* pc_relative */ | |
784 | 0, /* bitpos */ | |
785 | complain_overflow_dont,/* complain_on_overflow */ | |
786 | bfd_elf_generic_reloc, /* special_function */ | |
787 | "R_ARM_RPC24", /* name */ | |
788 | FALSE, /* partial_inplace */ | |
789 | 0, /* src_mask */ | |
790 | 0, /* dst_mask */ | |
791 | FALSE), /* pcrel_offset */ | |
792 | ||
793 | HOWTO (R_ARM_RBASE, /* type */ | |
794 | 0, /* rightshift */ | |
795 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
796 | 0, /* bitsize */ | |
797 | FALSE, /* pc_relative */ | |
798 | 0, /* bitpos */ | |
799 | complain_overflow_dont,/* complain_on_overflow */ | |
800 | bfd_elf_generic_reloc, /* special_function */ | |
801 | "R_ARM_RBASE", /* name */ | |
802 | FALSE, /* partial_inplace */ | |
803 | 0, /* src_mask */ | |
804 | 0, /* dst_mask */ | |
805 | FALSE) /* pcrel_offset */ | |
806 | }; | |
807 | ||
808 | static reloc_howto_type * | |
809 | elf32_arm_howto_from_type (unsigned int r_type) | |
810 | { | |
811 | if (r_type < NUM_ELEM (elf32_arm_howto_table)) | |
812 | return &elf32_arm_howto_table[r_type]; | |
813 | ||
814 | switch (r_type) | |
815 | { | |
816 | case R_ARM_GOT_PREL: | |
817 | return &elf32_arm_got_prel; | |
818 | ||
819 | case R_ARM_GNU_VTINHERIT: | |
820 | return &elf32_arm_vtinherit_howto; | |
821 | ||
822 | case R_ARM_GNU_VTENTRY: | |
823 | return &elf32_arm_vtentry_howto; | |
824 | ||
825 | case R_ARM_THM_PC11: | |
826 | return &elf32_arm_thm_pc11_howto; | |
827 | ||
828 | case R_ARM_THM_PC9: | |
829 | return &elf32_arm_thm_pc9_howto; | |
830 | ||
831 | case R_ARM_RREL32: | |
832 | case R_ARM_RABS32: | |
833 | case R_ARM_RPC24: | |
834 | case R_ARM_RBASE: | |
835 | return &elf32_arm_r_howto[r_type - R_ARM_RREL32]; | |
836 | ||
837 | default: | |
838 | return NULL; | |
839 | } | |
840 | } | |
841 | ||
842 | static void | |
843 | elf32_arm_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED, arelent * bfd_reloc, | |
844 | Elf_Internal_Rela * elf_reloc) | |
845 | { | |
846 | unsigned int r_type; | |
847 | ||
848 | r_type = ELF32_R_TYPE (elf_reloc->r_info); | |
849 | bfd_reloc->howto = elf32_arm_howto_from_type (r_type); | |
850 | } | |
851 | ||
852 | struct elf32_arm_reloc_map | |
853 | { | |
854 | bfd_reloc_code_real_type bfd_reloc_val; | |
855 | unsigned char elf_reloc_val; | |
856 | }; | |
857 | ||
858 | /* All entries in this list must also be present in elf32_arm_howto_table. */ | |
859 | static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] = | |
860 | { | |
861 | {BFD_RELOC_NONE, R_ARM_NONE}, | |
862 | {BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24}, | |
863 | {BFD_RELOC_ARM_PCREL_BLX, R_ARM_XPC25}, | |
864 | {BFD_RELOC_THUMB_PCREL_BLX, R_ARM_THM_XPC22}, | |
865 | {BFD_RELOC_32, R_ARM_ABS32}, | |
866 | {BFD_RELOC_32_PCREL, R_ARM_REL32}, | |
867 | {BFD_RELOC_8, R_ARM_ABS8}, | |
868 | {BFD_RELOC_16, R_ARM_ABS16}, | |
869 | {BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12}, | |
870 | {BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5}, | |
871 | {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_PC22}, | |
872 | {BFD_RELOC_ARM_COPY, R_ARM_COPY}, | |
873 | {BFD_RELOC_ARM_GLOB_DAT, R_ARM_GLOB_DAT}, | |
874 | {BFD_RELOC_ARM_JUMP_SLOT, R_ARM_JUMP_SLOT}, | |
875 | {BFD_RELOC_ARM_RELATIVE, R_ARM_RELATIVE}, | |
876 | {BFD_RELOC_ARM_GOTOFF, R_ARM_GOTOFF}, | |
877 | {BFD_RELOC_ARM_GOTPC, R_ARM_GOTPC}, | |
878 | {BFD_RELOC_ARM_GOT32, R_ARM_GOT32}, | |
879 | {BFD_RELOC_ARM_PLT32, R_ARM_PLT32}, | |
880 | {BFD_RELOC_ARM_TARGET1, R_ARM_TARGET1}, | |
881 | {BFD_RELOC_ARM_ROSEGREL32, R_ARM_ROSEGREL32}, | |
882 | {BFD_RELOC_ARM_SBREL32, R_ARM_SBREL32}, | |
883 | {BFD_RELOC_ARM_PREL31, R_ARM_PREL31}, | |
884 | {BFD_RELOC_ARM_TARGET2, R_ARM_TARGET2} | |
885 | }; | |
886 | ||
887 | static reloc_howto_type * | |
888 | elf32_arm_reloc_type_lookup (abfd, code) | |
889 | bfd *abfd ATTRIBUTE_UNUSED; | |
890 | bfd_reloc_code_real_type code; | |
891 | { | |
892 | unsigned int i; | |
893 | ||
894 | switch (code) | |
895 | { | |
896 | case BFD_RELOC_VTABLE_INHERIT: | |
897 | return & elf32_arm_vtinherit_howto; | |
898 | ||
899 | case BFD_RELOC_VTABLE_ENTRY: | |
900 | return & elf32_arm_vtentry_howto; | |
901 | ||
902 | case BFD_RELOC_THUMB_PCREL_BRANCH12: | |
903 | return & elf32_arm_thm_pc11_howto; | |
904 | ||
905 | case BFD_RELOC_THUMB_PCREL_BRANCH9: | |
906 | return & elf32_arm_thm_pc9_howto; | |
907 | ||
908 | default: | |
909 | for (i = 0; i < NUM_ELEM (elf32_arm_reloc_map); i ++) | |
910 | if (elf32_arm_reloc_map[i].bfd_reloc_val == code) | |
911 | return & elf32_arm_howto_table[elf32_arm_reloc_map[i].elf_reloc_val]; | |
912 | ||
913 | return NULL; | |
914 | } | |
915 | } | |
916 | ||
917 | /* Support for core dump NOTE sections */ | |
918 | static bfd_boolean | |
919 | elf32_arm_nabi_grok_prstatus (abfd, note) | |
920 | bfd *abfd; | |
921 | Elf_Internal_Note *note; | |
922 | { | |
923 | int offset; | |
924 | size_t size; | |
925 | ||
926 | switch (note->descsz) | |
927 | { | |
928 | default: | |
929 | return FALSE; | |
930 | ||
931 | case 148: /* Linux/ARM 32-bit*/ | |
932 | /* pr_cursig */ | |
933 | elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); | |
934 | ||
935 | /* pr_pid */ | |
936 | elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); | |
937 | ||
938 | /* pr_reg */ | |
939 | offset = 72; | |
940 | size = 72; | |
941 | ||
942 | break; | |
943 | } | |
944 | ||
945 | /* Make a ".reg/999" section. */ | |
946 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
947 | size, note->descpos + offset); | |
948 | } | |
949 | ||
950 | static bfd_boolean | |
951 | elf32_arm_nabi_grok_psinfo (abfd, note) | |
952 | bfd *abfd; | |
953 | Elf_Internal_Note *note; | |
954 | { | |
955 | switch (note->descsz) | |
956 | { | |
957 | default: | |
958 | return FALSE; | |
959 | ||
960 | case 124: /* Linux/ARM elf_prpsinfo */ | |
961 | elf_tdata (abfd)->core_program | |
962 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); | |
963 | elf_tdata (abfd)->core_command | |
964 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); | |
965 | } | |
966 | ||
967 | /* Note that for some reason, a spurious space is tacked | |
968 | onto the end of the args in some (at least one anyway) | |
969 | implementations, so strip it off if it exists. */ | |
970 | ||
971 | { | |
972 | char *command = elf_tdata (abfd)->core_command; | |
973 | int n = strlen (command); | |
974 | ||
975 | if (0 < n && command[n - 1] == ' ') | |
976 | command[n - 1] = '\0'; | |
977 | } | |
978 | ||
979 | return TRUE; | |
980 | } | |
981 | ||
982 | #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vec | |
983 | #define TARGET_LITTLE_NAME "elf32-littlearm" | |
984 | #define TARGET_BIG_SYM bfd_elf32_bigarm_vec | |
985 | #define TARGET_BIG_NAME "elf32-bigarm" | |
986 | ||
987 | #define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus | |
988 | #define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo | |
989 | ||
acf8aed4 AM |
990 | #ifndef USE_REL |
991 | #define USE_REL 0 | |
992 | #endif | |
993 | ||
252b5132 RH |
994 | typedef unsigned long int insn32; |
995 | typedef unsigned short int insn16; | |
996 | ||
8cb51566 | 997 | /* In lieu of proper flags, assume all EABIv4 objects are interworkable. */ |
57e8b36a | 998 | #define INTERWORK_FLAG(abfd) \ |
8cb51566 | 999 | (EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) == EF_ARM_EABI_VER4 \ |
85a84e7a | 1000 | || (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK)) |
9b485d32 | 1001 | |
252b5132 RH |
1002 | /* The linker script knows the section names for placement. |
1003 | The entry_names are used to do simple name mangling on the stubs. | |
1004 | Given a function name, and its type, the stub can be found. The | |
9b485d32 | 1005 | name can be changed. The only requirement is the %s be present. */ |
252b5132 RH |
1006 | #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t" |
1007 | #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb" | |
1008 | ||
1009 | #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7" | |
1010 | #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm" | |
1011 | ||
1012 | /* The name of the dynamic interpreter. This is put in the .interp | |
1013 | section. */ | |
1014 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" | |
1015 | ||
5e681ec4 PB |
1016 | #ifdef FOUR_WORD_PLT |
1017 | ||
252b5132 RH |
1018 | /* The first entry in a procedure linkage table looks like |
1019 | this. It is set up so that any shared library function that is | |
59f2c4e7 | 1020 | called before the relocation has been set up calls the dynamic |
9b485d32 | 1021 | linker first. */ |
e5a52504 | 1022 | static const bfd_vma elf32_arm_plt0_entry [] = |
5e681ec4 PB |
1023 | { |
1024 | 0xe52de004, /* str lr, [sp, #-4]! */ | |
1025 | 0xe59fe010, /* ldr lr, [pc, #16] */ | |
1026 | 0xe08fe00e, /* add lr, pc, lr */ | |
1027 | 0xe5bef008, /* ldr pc, [lr, #8]! */ | |
1028 | }; | |
1029 | ||
1030 | /* Subsequent entries in a procedure linkage table look like | |
1031 | this. */ | |
e5a52504 | 1032 | static const bfd_vma elf32_arm_plt_entry [] = |
5e681ec4 PB |
1033 | { |
1034 | 0xe28fc600, /* add ip, pc, #NN */ | |
1035 | 0xe28cca00, /* add ip, ip, #NN */ | |
1036 | 0xe5bcf000, /* ldr pc, [ip, #NN]! */ | |
1037 | 0x00000000, /* unused */ | |
1038 | }; | |
1039 | ||
1040 | #else | |
1041 | ||
5e681ec4 PB |
1042 | /* The first entry in a procedure linkage table looks like |
1043 | this. It is set up so that any shared library function that is | |
1044 | called before the relocation has been set up calls the dynamic | |
1045 | linker first. */ | |
e5a52504 | 1046 | static const bfd_vma elf32_arm_plt0_entry [] = |
917583ad | 1047 | { |
5e681ec4 PB |
1048 | 0xe52de004, /* str lr, [sp, #-4]! */ |
1049 | 0xe59fe004, /* ldr lr, [pc, #4] */ | |
1050 | 0xe08fe00e, /* add lr, pc, lr */ | |
1051 | 0xe5bef008, /* ldr pc, [lr, #8]! */ | |
1052 | 0x00000000, /* &GOT[0] - . */ | |
917583ad | 1053 | }; |
252b5132 RH |
1054 | |
1055 | /* Subsequent entries in a procedure linkage table look like | |
1056 | this. */ | |
e5a52504 | 1057 | static const bfd_vma elf32_arm_plt_entry [] = |
5e681ec4 PB |
1058 | { |
1059 | 0xe28fc600, /* add ip, pc, #0xNN00000 */ | |
1060 | 0xe28cca00, /* add ip, ip, #0xNN000 */ | |
1061 | 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */ | |
1062 | }; | |
1063 | ||
1064 | #endif | |
252b5132 | 1065 | |
b7693d02 DJ |
1066 | /* An initial stub used if the PLT entry is referenced from Thumb code. */ |
1067 | #define PLT_THUMB_STUB_SIZE 4 | |
1068 | static const bfd_vma elf32_arm_plt_thumb_stub [] = | |
1069 | { | |
1070 | 0x4778, /* bx pc */ | |
1071 | 0x46c0 /* nop */ | |
1072 | }; | |
1073 | ||
e5a52504 MM |
1074 | /* The entries in a PLT when using a DLL-based target with multiple |
1075 | address spaces. */ | |
1076 | static const bfd_vma elf32_arm_symbian_plt_entry [] = | |
1077 | { | |
1078 | 0xe51ff004, /* ldr pr, [pc, #-4] */ | |
1079 | 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */ | |
1080 | }; | |
1081 | ||
e489d0ae PB |
1082 | /* Used to build a map of a section. This is required for mixed-endian |
1083 | code/data. */ | |
1084 | ||
1085 | typedef struct elf32_elf_section_map | |
1086 | { | |
1087 | bfd_vma vma; | |
1088 | char type; | |
1089 | } | |
1090 | elf32_arm_section_map; | |
1091 | ||
1092 | struct _arm_elf_section_data | |
1093 | { | |
1094 | struct bfd_elf_section_data elf; | |
1095 | int mapcount; | |
1096 | elf32_arm_section_map *map; | |
1097 | }; | |
1098 | ||
1099 | #define elf32_arm_section_data(sec) \ | |
1100 | ((struct _arm_elf_section_data *) elf_section_data (sec)) | |
1101 | ||
252b5132 RH |
1102 | /* The ARM linker needs to keep track of the number of relocs that it |
1103 | decides to copy in check_relocs for each symbol. This is so that | |
1104 | it can discard PC relative relocs if it doesn't need them when | |
1105 | linking with -Bsymbolic. We store the information in a field | |
1106 | extending the regular ELF linker hash table. */ | |
1107 | ||
1108 | /* This structure keeps track of the number of PC relative relocs we | |
1109 | have copied for a given symbol. */ | |
5e681ec4 | 1110 | struct elf32_arm_relocs_copied |
917583ad NC |
1111 | { |
1112 | /* Next section. */ | |
5e681ec4 | 1113 | struct elf32_arm_relocs_copied * next; |
917583ad NC |
1114 | /* A section in dynobj. */ |
1115 | asection * section; | |
1116 | /* Number of relocs copied in this section. */ | |
1117 | bfd_size_type count; | |
1118 | }; | |
252b5132 | 1119 | |
ba96a88f | 1120 | /* Arm ELF linker hash entry. */ |
252b5132 | 1121 | struct elf32_arm_link_hash_entry |
917583ad NC |
1122 | { |
1123 | struct elf_link_hash_entry root; | |
252b5132 | 1124 | |
917583ad | 1125 | /* Number of PC relative relocs copied for this symbol. */ |
5e681ec4 | 1126 | struct elf32_arm_relocs_copied * relocs_copied; |
b7693d02 DJ |
1127 | |
1128 | /* We reference count Thumb references to a PLT entry separately, | |
1129 | so that we can emit the Thumb trampoline only if needed. */ | |
1130 | bfd_signed_vma plt_thumb_refcount; | |
1131 | ||
1132 | /* Since PLT entries have variable size if the Thumb prologue is | |
1133 | used, we need to record the index into .got.plt instead of | |
1134 | recomputing it from the PLT offset. */ | |
1135 | bfd_signed_vma plt_got_offset; | |
917583ad | 1136 | }; |
252b5132 | 1137 | |
252b5132 | 1138 | /* Traverse an arm ELF linker hash table. */ |
252b5132 RH |
1139 | #define elf32_arm_link_hash_traverse(table, func, info) \ |
1140 | (elf_link_hash_traverse \ | |
1141 | (&(table)->root, \ | |
b7693d02 | 1142 | (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \ |
252b5132 RH |
1143 | (info))) |
1144 | ||
1145 | /* Get the ARM elf linker hash table from a link_info structure. */ | |
1146 | #define elf32_arm_hash_table(info) \ | |
1147 | ((struct elf32_arm_link_hash_table *) ((info)->hash)) | |
1148 | ||
9b485d32 | 1149 | /* ARM ELF linker hash table. */ |
252b5132 | 1150 | struct elf32_arm_link_hash_table |
917583ad NC |
1151 | { |
1152 | /* The main hash table. */ | |
1153 | struct elf_link_hash_table root; | |
252b5132 | 1154 | |
4cc11e76 | 1155 | /* The size in bytes of the section containing the Thumb-to-ARM glue. */ |
dc810e39 | 1156 | bfd_size_type thumb_glue_size; |
252b5132 | 1157 | |
4cc11e76 | 1158 | /* The size in bytes of the section containing the ARM-to-Thumb glue. */ |
dc810e39 | 1159 | bfd_size_type arm_glue_size; |
252b5132 | 1160 | |
4cc11e76 | 1161 | /* An arbitrary input BFD chosen to hold the glue sections. */ |
917583ad | 1162 | bfd * bfd_of_glue_owner; |
ba96a88f | 1163 | |
e489d0ae PB |
1164 | /* Nonzero to output a BE8 image. */ |
1165 | int byteswap_code; | |
1166 | ||
9c504268 PB |
1167 | /* Zero if R_ARM_TARGET1 means R_ARM_ABS32. |
1168 | Nonzero if R_ARM_TARGET1 means R_ARM_ABS32. */ | |
1169 | int target1_is_rel; | |
1170 | ||
eb043451 PB |
1171 | /* The relocation to use for R_ARM_TARGET2 relocations. */ |
1172 | int target2_reloc; | |
1173 | ||
e5a52504 MM |
1174 | /* The number of bytes in the initial entry in the PLT. */ |
1175 | bfd_size_type plt_header_size; | |
1176 | ||
1177 | /* The number of bytes in the subsequent PLT etries. */ | |
1178 | bfd_size_type plt_entry_size; | |
1179 | ||
1180 | /* True if the target system is Symbian OS. */ | |
1181 | int symbian_p; | |
1182 | ||
5e681ec4 PB |
1183 | /* Short-cuts to get to dynamic linker sections. */ |
1184 | asection *sgot; | |
1185 | asection *sgotplt; | |
1186 | asection *srelgot; | |
1187 | asection *splt; | |
1188 | asection *srelplt; | |
1189 | asection *sdynbss; | |
1190 | asection *srelbss; | |
1191 | ||
1192 | /* Small local sym to section mapping cache. */ | |
1193 | struct sym_sec_cache sym_sec; | |
b7693d02 DJ |
1194 | |
1195 | /* For convenience in allocate_dynrelocs. */ | |
1196 | bfd * obfd; | |
917583ad | 1197 | }; |
252b5132 | 1198 | |
780a67af NC |
1199 | /* Create an entry in an ARM ELF linker hash table. */ |
1200 | ||
1201 | static struct bfd_hash_entry * | |
57e8b36a NC |
1202 | elf32_arm_link_hash_newfunc (struct bfd_hash_entry * entry, |
1203 | struct bfd_hash_table * table, | |
1204 | const char * string) | |
780a67af NC |
1205 | { |
1206 | struct elf32_arm_link_hash_entry * ret = | |
1207 | (struct elf32_arm_link_hash_entry *) entry; | |
1208 | ||
1209 | /* Allocate the structure if it has not already been allocated by a | |
1210 | subclass. */ | |
1211 | if (ret == (struct elf32_arm_link_hash_entry *) NULL) | |
57e8b36a NC |
1212 | ret = bfd_hash_allocate (table, sizeof (struct elf32_arm_link_hash_entry)); |
1213 | if (ret == NULL) | |
780a67af NC |
1214 | return (struct bfd_hash_entry *) ret; |
1215 | ||
1216 | /* Call the allocation method of the superclass. */ | |
1217 | ret = ((struct elf32_arm_link_hash_entry *) | |
1218 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, | |
1219 | table, string)); | |
57e8b36a | 1220 | if (ret != NULL) |
b7693d02 DJ |
1221 | { |
1222 | ret->relocs_copied = NULL; | |
1223 | ret->plt_thumb_refcount = 0; | |
1224 | ret->plt_got_offset = -1; | |
1225 | } | |
780a67af NC |
1226 | |
1227 | return (struct bfd_hash_entry *) ret; | |
1228 | } | |
1229 | ||
5e681ec4 PB |
1230 | /* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up |
1231 | shortcuts to them in our hash table. */ | |
1232 | ||
1233 | static bfd_boolean | |
57e8b36a | 1234 | create_got_section (bfd *dynobj, struct bfd_link_info *info) |
5e681ec4 PB |
1235 | { |
1236 | struct elf32_arm_link_hash_table *htab; | |
1237 | ||
e5a52504 MM |
1238 | htab = elf32_arm_hash_table (info); |
1239 | /* BPABI objects never have a GOT, or associated sections. */ | |
1240 | if (htab->symbian_p) | |
1241 | return TRUE; | |
1242 | ||
5e681ec4 PB |
1243 | if (! _bfd_elf_create_got_section (dynobj, info)) |
1244 | return FALSE; | |
1245 | ||
5e681ec4 PB |
1246 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); |
1247 | htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); | |
1248 | if (!htab->sgot || !htab->sgotplt) | |
1249 | abort (); | |
1250 | ||
1251 | htab->srelgot = bfd_make_section (dynobj, ".rel.got"); | |
1252 | if (htab->srelgot == NULL | |
1253 | || ! bfd_set_section_flags (dynobj, htab->srelgot, | |
1254 | (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | |
1255 | | SEC_IN_MEMORY | SEC_LINKER_CREATED | |
1256 | | SEC_READONLY)) | |
1257 | || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2)) | |
1258 | return FALSE; | |
1259 | return TRUE; | |
1260 | } | |
1261 | ||
1262 | /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and | |
1263 | .rel.bss sections in DYNOBJ, and set up shortcuts to them in our | |
1264 | hash table. */ | |
1265 | ||
1266 | static bfd_boolean | |
57e8b36a | 1267 | elf32_arm_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) |
5e681ec4 PB |
1268 | { |
1269 | struct elf32_arm_link_hash_table *htab; | |
1270 | ||
1271 | htab = elf32_arm_hash_table (info); | |
1272 | if (!htab->sgot && !create_got_section (dynobj, info)) | |
1273 | return FALSE; | |
1274 | ||
1275 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) | |
1276 | return FALSE; | |
1277 | ||
1278 | htab->splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1279 | htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt"); | |
1280 | htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); | |
1281 | if (!info->shared) | |
1282 | htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss"); | |
1283 | ||
e5a52504 MM |
1284 | if (!htab->splt |
1285 | || !htab->srelplt | |
1286 | || !htab->sdynbss | |
5e681ec4 PB |
1287 | || (!info->shared && !htab->srelbss)) |
1288 | abort (); | |
1289 | ||
1290 | return TRUE; | |
1291 | } | |
1292 | ||
1293 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
1294 | ||
1295 | static void | |
1296 | elf32_arm_copy_indirect_symbol (const struct elf_backend_data *bed, | |
1297 | struct elf_link_hash_entry *dir, | |
1298 | struct elf_link_hash_entry *ind) | |
1299 | { | |
1300 | struct elf32_arm_link_hash_entry *edir, *eind; | |
1301 | ||
1302 | edir = (struct elf32_arm_link_hash_entry *) dir; | |
1303 | eind = (struct elf32_arm_link_hash_entry *) ind; | |
1304 | ||
1305 | if (eind->relocs_copied != NULL) | |
1306 | { | |
1307 | if (edir->relocs_copied != NULL) | |
1308 | { | |
1309 | struct elf32_arm_relocs_copied **pp; | |
1310 | struct elf32_arm_relocs_copied *p; | |
1311 | ||
1312 | if (ind->root.type == bfd_link_hash_indirect) | |
1313 | abort (); | |
1314 | ||
1315 | /* Add reloc counts against the weak sym to the strong sym | |
1316 | list. Merge any entries against the same section. */ | |
1317 | for (pp = &eind->relocs_copied; (p = *pp) != NULL; ) | |
1318 | { | |
1319 | struct elf32_arm_relocs_copied *q; | |
1320 | ||
1321 | for (q = edir->relocs_copied; q != NULL; q = q->next) | |
1322 | if (q->section == p->section) | |
1323 | { | |
5e681ec4 PB |
1324 | q->count += p->count; |
1325 | *pp = p->next; | |
1326 | break; | |
1327 | } | |
1328 | if (q == NULL) | |
1329 | pp = &p->next; | |
1330 | } | |
1331 | *pp = edir->relocs_copied; | |
1332 | } | |
1333 | ||
1334 | edir->relocs_copied = eind->relocs_copied; | |
1335 | eind->relocs_copied = NULL; | |
1336 | } | |
1337 | ||
b7693d02 DJ |
1338 | /* If the direct symbol already has an associated PLT entry, the |
1339 | indirect symbol should not. If it doesn't, swap refcount information | |
1340 | from the indirect symbol. */ | |
1341 | if (edir->plt_thumb_refcount == 0) | |
1342 | { | |
1343 | edir->plt_thumb_refcount = eind->plt_thumb_refcount; | |
1344 | eind->plt_thumb_refcount = 0; | |
1345 | } | |
1346 | else | |
1347 | BFD_ASSERT (eind->plt_thumb_refcount == 0); | |
1348 | ||
5e681ec4 PB |
1349 | _bfd_elf_link_hash_copy_indirect (bed, dir, ind); |
1350 | } | |
1351 | ||
9b485d32 | 1352 | /* Create an ARM elf linker hash table. */ |
252b5132 RH |
1353 | |
1354 | static struct bfd_link_hash_table * | |
57e8b36a | 1355 | elf32_arm_link_hash_table_create (bfd *abfd) |
252b5132 RH |
1356 | { |
1357 | struct elf32_arm_link_hash_table *ret; | |
dc810e39 | 1358 | bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table); |
252b5132 | 1359 | |
57e8b36a NC |
1360 | ret = bfd_malloc (amt); |
1361 | if (ret == NULL) | |
252b5132 RH |
1362 | return NULL; |
1363 | ||
57e8b36a | 1364 | if (!_bfd_elf_link_hash_table_init (& ret->root, abfd, |
780a67af | 1365 | elf32_arm_link_hash_newfunc)) |
252b5132 | 1366 | { |
e2d34d7d | 1367 | free (ret); |
252b5132 RH |
1368 | return NULL; |
1369 | } | |
1370 | ||
5e681ec4 PB |
1371 | ret->sgot = NULL; |
1372 | ret->sgotplt = NULL; | |
1373 | ret->srelgot = NULL; | |
1374 | ret->splt = NULL; | |
1375 | ret->srelplt = NULL; | |
1376 | ret->sdynbss = NULL; | |
1377 | ret->srelbss = NULL; | |
252b5132 RH |
1378 | ret->thumb_glue_size = 0; |
1379 | ret->arm_glue_size = 0; | |
1380 | ret->bfd_of_glue_owner = NULL; | |
e489d0ae | 1381 | ret->byteswap_code = 0; |
9c504268 | 1382 | ret->target1_is_rel = 0; |
eb043451 | 1383 | ret->target2_reloc = R_ARM_NONE; |
e5a52504 MM |
1384 | #ifdef FOUR_WORD_PLT |
1385 | ret->plt_header_size = 16; | |
1386 | ret->plt_entry_size = 16; | |
1387 | #else | |
1388 | ret->plt_header_size = 20; | |
1389 | ret->plt_entry_size = 12; | |
1390 | #endif | |
1391 | ret->symbian_p = 0; | |
5e681ec4 | 1392 | ret->sym_sec.abfd = NULL; |
b7693d02 | 1393 | ret->obfd = abfd; |
252b5132 RH |
1394 | |
1395 | return &ret->root.root; | |
1396 | } | |
1397 | ||
9b485d32 NC |
1398 | /* Locate the Thumb encoded calling stub for NAME. */ |
1399 | ||
252b5132 | 1400 | static struct elf_link_hash_entry * |
57e8b36a NC |
1401 | find_thumb_glue (struct bfd_link_info *link_info, |
1402 | const char *name, | |
1403 | bfd *input_bfd) | |
252b5132 RH |
1404 | { |
1405 | char *tmp_name; | |
1406 | struct elf_link_hash_entry *hash; | |
1407 | struct elf32_arm_link_hash_table *hash_table; | |
1408 | ||
1409 | /* We need a pointer to the armelf specific hash table. */ | |
1410 | hash_table = elf32_arm_hash_table (link_info); | |
1411 | ||
57e8b36a NC |
1412 | tmp_name = bfd_malloc ((bfd_size_type) strlen (name) |
1413 | + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1); | |
252b5132 RH |
1414 | |
1415 | BFD_ASSERT (tmp_name); | |
1416 | ||
1417 | sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name); | |
1418 | ||
1419 | hash = elf_link_hash_lookup | |
b34976b6 | 1420 | (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE); |
252b5132 RH |
1421 | |
1422 | if (hash == NULL) | |
1423 | /* xgettext:c-format */ | |
d003868e AM |
1424 | (*_bfd_error_handler) (_("%B: unable to find THUMB glue '%s' for `%s'"), |
1425 | input_bfd, tmp_name, name); | |
252b5132 RH |
1426 | |
1427 | free (tmp_name); | |
1428 | ||
1429 | return hash; | |
1430 | } | |
1431 | ||
9b485d32 NC |
1432 | /* Locate the ARM encoded calling stub for NAME. */ |
1433 | ||
252b5132 | 1434 | static struct elf_link_hash_entry * |
57e8b36a NC |
1435 | find_arm_glue (struct bfd_link_info *link_info, |
1436 | const char *name, | |
1437 | bfd *input_bfd) | |
252b5132 RH |
1438 | { |
1439 | char *tmp_name; | |
1440 | struct elf_link_hash_entry *myh; | |
1441 | struct elf32_arm_link_hash_table *hash_table; | |
1442 | ||
1443 | /* We need a pointer to the elfarm specific hash table. */ | |
1444 | hash_table = elf32_arm_hash_table (link_info); | |
1445 | ||
57e8b36a NC |
1446 | tmp_name = bfd_malloc ((bfd_size_type) strlen (name) |
1447 | + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1); | |
252b5132 RH |
1448 | |
1449 | BFD_ASSERT (tmp_name); | |
1450 | ||
1451 | sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name); | |
1452 | ||
1453 | myh = elf_link_hash_lookup | |
b34976b6 | 1454 | (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE); |
252b5132 RH |
1455 | |
1456 | if (myh == NULL) | |
1457 | /* xgettext:c-format */ | |
d003868e AM |
1458 | (*_bfd_error_handler) (_("%B: unable to find ARM glue '%s' for `%s'"), |
1459 | input_bfd, tmp_name, name); | |
252b5132 RH |
1460 | |
1461 | free (tmp_name); | |
1462 | ||
1463 | return myh; | |
1464 | } | |
1465 | ||
9b485d32 | 1466 | /* ARM->Thumb glue: |
252b5132 RH |
1467 | |
1468 | .arm | |
1469 | __func_from_arm: | |
1470 | ldr r12, __func_addr | |
1471 | bx r12 | |
1472 | __func_addr: | |
9b485d32 | 1473 | .word func @ behave as if you saw a ARM_32 reloc. */ |
252b5132 RH |
1474 | |
1475 | #define ARM2THUMB_GLUE_SIZE 12 | |
1476 | static const insn32 a2t1_ldr_insn = 0xe59fc000; | |
1477 | static const insn32 a2t2_bx_r12_insn = 0xe12fff1c; | |
1478 | static const insn32 a2t3_func_addr_insn = 0x00000001; | |
1479 | ||
9b485d32 | 1480 | /* Thumb->ARM: Thumb->(non-interworking aware) ARM |
252b5132 RH |
1481 | |
1482 | .thumb .thumb | |
1483 | .align 2 .align 2 | |
1484 | __func_from_thumb: __func_from_thumb: | |
1485 | bx pc push {r6, lr} | |
1486 | nop ldr r6, __func_addr | |
1487 | .arm mov lr, pc | |
1488 | __func_change_to_arm: bx r6 | |
1489 | b func .arm | |
1490 | __func_back_to_thumb: | |
1491 | ldmia r13! {r6, lr} | |
1492 | bx lr | |
1493 | __func_addr: | |
9b485d32 | 1494 | .word func */ |
252b5132 RH |
1495 | |
1496 | #define THUMB2ARM_GLUE_SIZE 8 | |
1497 | static const insn16 t2a1_bx_pc_insn = 0x4778; | |
1498 | static const insn16 t2a2_noop_insn = 0x46c0; | |
1499 | static const insn32 t2a3_b_insn = 0xea000000; | |
1500 | ||
7e392df6 | 1501 | #ifndef ELFARM_NABI_C_INCLUDED |
b34976b6 | 1502 | bfd_boolean |
57e8b36a | 1503 | bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info * info) |
252b5132 RH |
1504 | { |
1505 | asection * s; | |
1506 | bfd_byte * foo; | |
1507 | struct elf32_arm_link_hash_table * globals; | |
1508 | ||
1509 | globals = elf32_arm_hash_table (info); | |
1510 | ||
1511 | BFD_ASSERT (globals != NULL); | |
1512 | ||
1513 | if (globals->arm_glue_size != 0) | |
1514 | { | |
1515 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
1516 | ||
dc810e39 AM |
1517 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, |
1518 | ARM2THUMB_GLUE_SECTION_NAME); | |
252b5132 RH |
1519 | |
1520 | BFD_ASSERT (s != NULL); | |
1521 | ||
57e8b36a | 1522 | foo = bfd_alloc (globals->bfd_of_glue_owner, globals->arm_glue_size); |
252b5132 | 1523 | |
eea6121a | 1524 | s->size = globals->arm_glue_size; |
252b5132 RH |
1525 | s->contents = foo; |
1526 | } | |
1527 | ||
1528 | if (globals->thumb_glue_size != 0) | |
1529 | { | |
1530 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
1531 | ||
1532 | s = bfd_get_section_by_name | |
1533 | (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME); | |
1534 | ||
1535 | BFD_ASSERT (s != NULL); | |
1536 | ||
57e8b36a | 1537 | foo = bfd_alloc (globals->bfd_of_glue_owner, globals->thumb_glue_size); |
252b5132 | 1538 | |
eea6121a | 1539 | s->size = globals->thumb_glue_size; |
252b5132 RH |
1540 | s->contents = foo; |
1541 | } | |
1542 | ||
b34976b6 | 1543 | return TRUE; |
252b5132 RH |
1544 | } |
1545 | ||
1546 | static void | |
57e8b36a NC |
1547 | record_arm_to_thumb_glue (struct bfd_link_info * link_info, |
1548 | struct elf_link_hash_entry * h) | |
252b5132 RH |
1549 | { |
1550 | const char * name = h->root.root.string; | |
63b0f745 | 1551 | asection * s; |
252b5132 RH |
1552 | char * tmp_name; |
1553 | struct elf_link_hash_entry * myh; | |
14a793b2 | 1554 | struct bfd_link_hash_entry * bh; |
252b5132 | 1555 | struct elf32_arm_link_hash_table * globals; |
dc810e39 | 1556 | bfd_vma val; |
252b5132 RH |
1557 | |
1558 | globals = elf32_arm_hash_table (link_info); | |
1559 | ||
1560 | BFD_ASSERT (globals != NULL); | |
1561 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
1562 | ||
1563 | s = bfd_get_section_by_name | |
1564 | (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME); | |
1565 | ||
252b5132 RH |
1566 | BFD_ASSERT (s != NULL); |
1567 | ||
57e8b36a | 1568 | tmp_name = bfd_malloc ((bfd_size_type) strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1); |
252b5132 RH |
1569 | |
1570 | BFD_ASSERT (tmp_name); | |
1571 | ||
1572 | sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name); | |
1573 | ||
1574 | myh = elf_link_hash_lookup | |
b34976b6 | 1575 | (&(globals)->root, tmp_name, FALSE, FALSE, TRUE); |
252b5132 RH |
1576 | |
1577 | if (myh != NULL) | |
1578 | { | |
9b485d32 | 1579 | /* We've already seen this guy. */ |
252b5132 | 1580 | free (tmp_name); |
9b485d32 | 1581 | return; |
252b5132 RH |
1582 | } |
1583 | ||
57e8b36a NC |
1584 | /* The only trick here is using hash_table->arm_glue_size as the value. |
1585 | Even though the section isn't allocated yet, this is where we will be | |
1586 | putting it. */ | |
14a793b2 | 1587 | bh = NULL; |
dc810e39 AM |
1588 | val = globals->arm_glue_size + 1; |
1589 | _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner, | |
1590 | tmp_name, BSF_GLOBAL, s, val, | |
b34976b6 | 1591 | NULL, TRUE, FALSE, &bh); |
252b5132 | 1592 | |
b7693d02 DJ |
1593 | myh = (struct elf_link_hash_entry *) bh; |
1594 | myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC); | |
1595 | myh->forced_local = 1; | |
1596 | ||
252b5132 RH |
1597 | free (tmp_name); |
1598 | ||
1599 | globals->arm_glue_size += ARM2THUMB_GLUE_SIZE; | |
1600 | ||
1601 | return; | |
1602 | } | |
1603 | ||
1604 | static void | |
57e8b36a NC |
1605 | record_thumb_to_arm_glue (struct bfd_link_info *link_info, |
1606 | struct elf_link_hash_entry *h) | |
252b5132 RH |
1607 | { |
1608 | const char *name = h->root.root.string; | |
63b0f745 | 1609 | asection *s; |
252b5132 RH |
1610 | char *tmp_name; |
1611 | struct elf_link_hash_entry *myh; | |
14a793b2 | 1612 | struct bfd_link_hash_entry *bh; |
252b5132 | 1613 | struct elf32_arm_link_hash_table *hash_table; |
dc810e39 | 1614 | bfd_vma val; |
252b5132 RH |
1615 | |
1616 | hash_table = elf32_arm_hash_table (link_info); | |
1617 | ||
1618 | BFD_ASSERT (hash_table != NULL); | |
1619 | BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL); | |
1620 | ||
1621 | s = bfd_get_section_by_name | |
1622 | (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME); | |
1623 | ||
1624 | BFD_ASSERT (s != NULL); | |
1625 | ||
57e8b36a NC |
1626 | tmp_name = bfd_malloc ((bfd_size_type) strlen (name) |
1627 | + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1); | |
252b5132 RH |
1628 | |
1629 | BFD_ASSERT (tmp_name); | |
1630 | ||
1631 | sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name); | |
1632 | ||
1633 | myh = elf_link_hash_lookup | |
b34976b6 | 1634 | (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE); |
252b5132 RH |
1635 | |
1636 | if (myh != NULL) | |
1637 | { | |
9b485d32 | 1638 | /* We've already seen this guy. */ |
252b5132 | 1639 | free (tmp_name); |
9b485d32 | 1640 | return; |
252b5132 RH |
1641 | } |
1642 | ||
14a793b2 | 1643 | bh = NULL; |
dc810e39 AM |
1644 | val = hash_table->thumb_glue_size + 1; |
1645 | _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner, | |
1646 | tmp_name, BSF_GLOBAL, s, val, | |
b34976b6 | 1647 | NULL, TRUE, FALSE, &bh); |
252b5132 | 1648 | |
9b485d32 | 1649 | /* If we mark it 'Thumb', the disassembler will do a better job. */ |
14a793b2 | 1650 | myh = (struct elf_link_hash_entry *) bh; |
b7693d02 DJ |
1651 | myh->type = ELF_ST_INFO (STB_LOCAL, STT_ARM_TFUNC); |
1652 | myh->forced_local = 1; | |
252b5132 RH |
1653 | |
1654 | free (tmp_name); | |
1655 | ||
252b5132 RH |
1656 | #define CHANGE_TO_ARM "__%s_change_to_arm" |
1657 | #define BACK_FROM_ARM "__%s_back_from_arm" | |
1658 | ||
9b485d32 | 1659 | /* Allocate another symbol to mark where we switch to Arm mode. */ |
57e8b36a NC |
1660 | tmp_name = bfd_malloc ((bfd_size_type) strlen (name) |
1661 | + strlen (CHANGE_TO_ARM) + 1); | |
252b5132 RH |
1662 | |
1663 | BFD_ASSERT (tmp_name); | |
1664 | ||
1665 | sprintf (tmp_name, CHANGE_TO_ARM, name); | |
1666 | ||
14a793b2 | 1667 | bh = NULL; |
dc810e39 AM |
1668 | val = hash_table->thumb_glue_size + 4, |
1669 | _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner, | |
1670 | tmp_name, BSF_LOCAL, s, val, | |
b34976b6 | 1671 | NULL, TRUE, FALSE, &bh); |
252b5132 RH |
1672 | |
1673 | free (tmp_name); | |
1674 | ||
1675 | hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE; | |
1676 | ||
1677 | return; | |
1678 | } | |
1679 | ||
8afb0e02 NC |
1680 | /* Add the glue sections to ABFD. This function is called from the |
1681 | linker scripts in ld/emultempl/{armelf}.em. */ | |
9b485d32 | 1682 | |
b34976b6 | 1683 | bfd_boolean |
57e8b36a NC |
1684 | bfd_elf32_arm_add_glue_sections_to_bfd (bfd *abfd, |
1685 | struct bfd_link_info *info) | |
252b5132 | 1686 | { |
252b5132 RH |
1687 | flagword flags; |
1688 | asection *sec; | |
1689 | ||
8afb0e02 NC |
1690 | /* If we are only performing a partial |
1691 | link do not bother adding the glue. */ | |
1049f94e | 1692 | if (info->relocatable) |
b34976b6 | 1693 | return TRUE; |
252b5132 | 1694 | |
252b5132 RH |
1695 | sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME); |
1696 | ||
1697 | if (sec == NULL) | |
1698 | { | |
57db232e NC |
1699 | /* Note: we do not include the flag SEC_LINKER_CREATED, as this |
1700 | will prevent elf_link_input_bfd() from processing the contents | |
1701 | of this section. */ | |
811b4bf6 | 1702 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY; |
252b5132 RH |
1703 | |
1704 | sec = bfd_make_section (abfd, ARM2THUMB_GLUE_SECTION_NAME); | |
1705 | ||
1706 | if (sec == NULL | |
1707 | || !bfd_set_section_flags (abfd, sec, flags) | |
1708 | || !bfd_set_section_alignment (abfd, sec, 2)) | |
b34976b6 | 1709 | return FALSE; |
9a5aca8c | 1710 | |
57db232e NC |
1711 | /* Set the gc mark to prevent the section from being removed by garbage |
1712 | collection, despite the fact that no relocs refer to this section. */ | |
1713 | sec->gc_mark = 1; | |
252b5132 RH |
1714 | } |
1715 | ||
1716 | sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME); | |
1717 | ||
1718 | if (sec == NULL) | |
1719 | { | |
57e8b36a NC |
1720 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
1721 | | SEC_CODE | SEC_READONLY; | |
252b5132 RH |
1722 | |
1723 | sec = bfd_make_section (abfd, THUMB2ARM_GLUE_SECTION_NAME); | |
1724 | ||
1725 | if (sec == NULL | |
1726 | || !bfd_set_section_flags (abfd, sec, flags) | |
1727 | || !bfd_set_section_alignment (abfd, sec, 2)) | |
b34976b6 | 1728 | return FALSE; |
9a5aca8c | 1729 | |
57db232e | 1730 | sec->gc_mark = 1; |
252b5132 RH |
1731 | } |
1732 | ||
b34976b6 | 1733 | return TRUE; |
8afb0e02 NC |
1734 | } |
1735 | ||
1736 | /* Select a BFD to be used to hold the sections used by the glue code. | |
1737 | This function is called from the linker scripts in ld/emultempl/ | |
1738 | {armelf/pe}.em */ | |
1739 | ||
b34976b6 | 1740 | bfd_boolean |
57e8b36a | 1741 | bfd_elf32_arm_get_bfd_for_interworking (bfd *abfd, struct bfd_link_info *info) |
8afb0e02 NC |
1742 | { |
1743 | struct elf32_arm_link_hash_table *globals; | |
1744 | ||
1745 | /* If we are only performing a partial link | |
1746 | do not bother getting a bfd to hold the glue. */ | |
1049f94e | 1747 | if (info->relocatable) |
b34976b6 | 1748 | return TRUE; |
8afb0e02 | 1749 | |
b7693d02 DJ |
1750 | /* Make sure we don't attach the glue sections to a dynamic object. */ |
1751 | BFD_ASSERT (!(abfd->flags & DYNAMIC)); | |
1752 | ||
8afb0e02 NC |
1753 | globals = elf32_arm_hash_table (info); |
1754 | ||
1755 | BFD_ASSERT (globals != NULL); | |
1756 | ||
1757 | if (globals->bfd_of_glue_owner != NULL) | |
b34976b6 | 1758 | return TRUE; |
8afb0e02 | 1759 | |
252b5132 RH |
1760 | /* Save the bfd for later use. */ |
1761 | globals->bfd_of_glue_owner = abfd; | |
cedb70c5 | 1762 | |
b34976b6 | 1763 | return TRUE; |
252b5132 RH |
1764 | } |
1765 | ||
b34976b6 | 1766 | bfd_boolean |
57e8b36a NC |
1767 | bfd_elf32_arm_process_before_allocation (bfd *abfd, |
1768 | struct bfd_link_info *link_info, | |
eb043451 | 1769 | int byteswap_code) |
252b5132 RH |
1770 | { |
1771 | Elf_Internal_Shdr *symtab_hdr; | |
6cdc0ccc | 1772 | Elf_Internal_Rela *internal_relocs = NULL; |
252b5132 RH |
1773 | Elf_Internal_Rela *irel, *irelend; |
1774 | bfd_byte *contents = NULL; | |
252b5132 RH |
1775 | |
1776 | asection *sec; | |
1777 | struct elf32_arm_link_hash_table *globals; | |
1778 | ||
1779 | /* If we are only performing a partial link do not bother | |
1780 | to construct any glue. */ | |
1049f94e | 1781 | if (link_info->relocatable) |
b34976b6 | 1782 | return TRUE; |
252b5132 RH |
1783 | |
1784 | /* Here we have a bfd that is to be included on the link. We have a hook | |
1785 | to do reloc rummaging, before section sizes are nailed down. */ | |
252b5132 RH |
1786 | globals = elf32_arm_hash_table (link_info); |
1787 | ||
1788 | BFD_ASSERT (globals != NULL); | |
1789 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
1790 | ||
e489d0ae PB |
1791 | if (byteswap_code && !bfd_big_endian (abfd)) |
1792 | { | |
d003868e AM |
1793 | _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."), |
1794 | abfd); | |
e489d0ae PB |
1795 | return FALSE; |
1796 | } | |
1797 | globals->byteswap_code = byteswap_code; | |
f21f3fe0 | 1798 | |
252b5132 RH |
1799 | /* Rummage around all the relocs and map the glue vectors. */ |
1800 | sec = abfd->sections; | |
1801 | ||
1802 | if (sec == NULL) | |
b34976b6 | 1803 | return TRUE; |
252b5132 RH |
1804 | |
1805 | for (; sec != NULL; sec = sec->next) | |
1806 | { | |
1807 | if (sec->reloc_count == 0) | |
1808 | continue; | |
1809 | ||
1810 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
252b5132 | 1811 | |
9b485d32 | 1812 | /* Load the relocs. */ |
6cdc0ccc | 1813 | internal_relocs |
57e8b36a | 1814 | = _bfd_elf_link_read_relocs (abfd, sec, (void *) NULL, |
45d6a902 | 1815 | (Elf_Internal_Rela *) NULL, FALSE); |
252b5132 | 1816 | |
6cdc0ccc AM |
1817 | if (internal_relocs == NULL) |
1818 | goto error_return; | |
252b5132 | 1819 | |
6cdc0ccc AM |
1820 | irelend = internal_relocs + sec->reloc_count; |
1821 | for (irel = internal_relocs; irel < irelend; irel++) | |
252b5132 RH |
1822 | { |
1823 | long r_type; | |
1824 | unsigned long r_index; | |
252b5132 RH |
1825 | |
1826 | struct elf_link_hash_entry *h; | |
1827 | ||
1828 | r_type = ELF32_R_TYPE (irel->r_info); | |
1829 | r_index = ELF32_R_SYM (irel->r_info); | |
1830 | ||
9b485d32 | 1831 | /* These are the only relocation types we care about. */ |
ba96a88f | 1832 | if ( r_type != R_ARM_PC24 |
b7693d02 | 1833 | && r_type != R_ARM_PLT32 |
5b5bb741 PB |
1834 | #ifndef OLD_ARM_ABI |
1835 | && r_type != R_ARM_CALL | |
1836 | && r_type != R_ARM_JUMP24 | |
1837 | #endif | |
252b5132 RH |
1838 | && r_type != R_ARM_THM_PC22) |
1839 | continue; | |
1840 | ||
1841 | /* Get the section contents if we haven't done so already. */ | |
1842 | if (contents == NULL) | |
1843 | { | |
1844 | /* Get cached copy if it exists. */ | |
1845 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1846 | contents = elf_section_data (sec)->this_hdr.contents; | |
1847 | else | |
1848 | { | |
1849 | /* Go get them off disk. */ | |
57e8b36a | 1850 | if (! bfd_malloc_and_get_section (abfd, sec, &contents)) |
252b5132 RH |
1851 | goto error_return; |
1852 | } | |
1853 | } | |
1854 | ||
a7c10850 | 1855 | /* If the relocation is not against a symbol it cannot concern us. */ |
252b5132 RH |
1856 | h = NULL; |
1857 | ||
9b485d32 | 1858 | /* We don't care about local symbols. */ |
252b5132 RH |
1859 | if (r_index < symtab_hdr->sh_info) |
1860 | continue; | |
1861 | ||
9b485d32 | 1862 | /* This is an external symbol. */ |
252b5132 RH |
1863 | r_index -= symtab_hdr->sh_info; |
1864 | h = (struct elf_link_hash_entry *) | |
1865 | elf_sym_hashes (abfd)[r_index]; | |
1866 | ||
1867 | /* If the relocation is against a static symbol it must be within | |
1868 | the current section and so cannot be a cross ARM/Thumb relocation. */ | |
1869 | if (h == NULL) | |
1870 | continue; | |
1871 | ||
b7693d02 DJ |
1872 | /* If the call will go through a PLT entry then we do not need |
1873 | glue. */ | |
1874 | if (globals->splt != NULL && h->plt.offset != (bfd_vma) -1) | |
1875 | continue; | |
1876 | ||
252b5132 RH |
1877 | switch (r_type) |
1878 | { | |
1879 | case R_ARM_PC24: | |
5b5bb741 PB |
1880 | #ifndef OLD_ARM_ABI |
1881 | case R_ARM_CALL: | |
1882 | case R_ARM_JUMP24: | |
1883 | #endif | |
252b5132 | 1884 | /* This one is a call from arm code. We need to look up |
2f0ca46a | 1885 | the target of the call. If it is a thumb target, we |
252b5132 | 1886 | insert glue. */ |
252b5132 RH |
1887 | if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC) |
1888 | record_arm_to_thumb_glue (link_info, h); | |
1889 | break; | |
1890 | ||
1891 | case R_ARM_THM_PC22: | |
f21f3fe0 | 1892 | /* This one is a call from thumb code. We look |
2f0ca46a | 1893 | up the target of the call. If it is not a thumb |
bcbdc74c | 1894 | target, we insert glue. */ |
252b5132 RH |
1895 | if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC) |
1896 | record_thumb_to_arm_glue (link_info, h); | |
1897 | break; | |
1898 | ||
1899 | default: | |
1900 | break; | |
1901 | } | |
1902 | } | |
6cdc0ccc AM |
1903 | |
1904 | if (contents != NULL | |
1905 | && elf_section_data (sec)->this_hdr.contents != contents) | |
1906 | free (contents); | |
1907 | contents = NULL; | |
1908 | ||
1909 | if (internal_relocs != NULL | |
1910 | && elf_section_data (sec)->relocs != internal_relocs) | |
1911 | free (internal_relocs); | |
1912 | internal_relocs = NULL; | |
252b5132 RH |
1913 | } |
1914 | ||
b34976b6 | 1915 | return TRUE; |
9a5aca8c | 1916 | |
252b5132 | 1917 | error_return: |
6cdc0ccc AM |
1918 | if (contents != NULL |
1919 | && elf_section_data (sec)->this_hdr.contents != contents) | |
1920 | free (contents); | |
1921 | if (internal_relocs != NULL | |
1922 | && elf_section_data (sec)->relocs != internal_relocs) | |
1923 | free (internal_relocs); | |
9a5aca8c | 1924 | |
b34976b6 | 1925 | return FALSE; |
252b5132 | 1926 | } |
7e392df6 | 1927 | #endif |
252b5132 | 1928 | |
eb043451 PB |
1929 | |
1930 | #ifndef OLD_ARM_ABI | |
1931 | /* Set target relocation values needed during linking. */ | |
1932 | ||
1933 | void | |
1934 | bfd_elf32_arm_set_target_relocs (struct bfd_link_info *link_info, | |
1935 | int target1_is_rel, | |
1936 | char * target2_type) | |
1937 | { | |
1938 | struct elf32_arm_link_hash_table *globals; | |
1939 | ||
1940 | globals = elf32_arm_hash_table (link_info); | |
1941 | ||
1942 | globals->target1_is_rel = target1_is_rel; | |
1943 | if (strcmp (target2_type, "rel") == 0) | |
1944 | globals->target2_reloc = R_ARM_REL32; | |
eeac373a PB |
1945 | else if (strcmp (target2_type, "abs") == 0) |
1946 | globals->target2_reloc = R_ARM_ABS32; | |
eb043451 PB |
1947 | else if (strcmp (target2_type, "got-rel") == 0) |
1948 | globals->target2_reloc = R_ARM_GOT_PREL; | |
1949 | else | |
1950 | { | |
1951 | _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."), | |
1952 | target2_type); | |
1953 | } | |
1954 | } | |
1955 | #endif | |
1956 | ||
252b5132 RH |
1957 | /* The thumb form of a long branch is a bit finicky, because the offset |
1958 | encoding is split over two fields, each in it's own instruction. They | |
f21f3fe0 | 1959 | can occur in any order. So given a thumb form of long branch, and an |
252b5132 | 1960 | offset, insert the offset into the thumb branch and return finished |
f21f3fe0 | 1961 | instruction. |
252b5132 | 1962 | |
f21f3fe0 | 1963 | It takes two thumb instructions to encode the target address. Each has |
4cc11e76 | 1964 | 11 bits to invest. The upper 11 bits are stored in one (identified by |
f21f3fe0 UD |
1965 | H-0.. see below), the lower 11 bits are stored in the other (identified |
1966 | by H-1). | |
252b5132 | 1967 | |
f21f3fe0 | 1968 | Combine together and shifted left by 1 (it's a half word address) and |
252b5132 RH |
1969 | there you have it. |
1970 | ||
1971 | Op: 1111 = F, | |
1972 | H-0, upper address-0 = 000 | |
1973 | Op: 1111 = F, | |
1974 | H-1, lower address-0 = 800 | |
1975 | ||
f21f3fe0 | 1976 | They can be ordered either way, but the arm tools I've seen always put |
252b5132 RH |
1977 | the lower one first. It probably doesn't matter. krk@cygnus.com |
1978 | ||
1979 | XXX: Actually the order does matter. The second instruction (H-1) | |
1980 | moves the computed address into the PC, so it must be the second one | |
1981 | in the sequence. The problem, however is that whilst little endian code | |
1982 | stores the instructions in HI then LOW order, big endian code does the | |
dfc5f959 | 1983 | reverse. nickc@cygnus.com. */ |
252b5132 | 1984 | |
dfc5f959 NC |
1985 | #define LOW_HI_ORDER 0xF800F000 |
1986 | #define HI_LOW_ORDER 0xF000F800 | |
252b5132 RH |
1987 | |
1988 | static insn32 | |
57e8b36a | 1989 | insert_thumb_branch (insn32 br_insn, int rel_off) |
252b5132 RH |
1990 | { |
1991 | unsigned int low_bits; | |
1992 | unsigned int high_bits; | |
1993 | ||
252b5132 RH |
1994 | BFD_ASSERT ((rel_off & 1) != 1); |
1995 | ||
dfc5f959 NC |
1996 | rel_off >>= 1; /* Half word aligned address. */ |
1997 | low_bits = rel_off & 0x000007FF; /* The bottom 11 bits. */ | |
1998 | high_bits = (rel_off >> 11) & 0x000007FF; /* The top 11 bits. */ | |
252b5132 RH |
1999 | |
2000 | if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER) | |
2001 | br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits; | |
2002 | else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER) | |
2003 | br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits; | |
2004 | else | |
9b485d32 | 2005 | /* FIXME: abort is probably not the right call. krk@cygnus.com */ |
57e8b36a | 2006 | abort (); /* Error - not a valid branch instruction form. */ |
252b5132 | 2007 | |
252b5132 RH |
2008 | return br_insn; |
2009 | } | |
2010 | ||
9b485d32 NC |
2011 | /* Thumb code calling an ARM function. */ |
2012 | ||
252b5132 | 2013 | static int |
57e8b36a NC |
2014 | elf32_thumb_to_arm_stub (struct bfd_link_info * info, |
2015 | const char * name, | |
2016 | bfd * input_bfd, | |
2017 | bfd * output_bfd, | |
2018 | asection * input_section, | |
2019 | bfd_byte * hit_data, | |
2020 | asection * sym_sec, | |
2021 | bfd_vma offset, | |
2022 | bfd_signed_vma addend, | |
2023 | bfd_vma val) | |
252b5132 | 2024 | { |
bcbdc74c | 2025 | asection * s = 0; |
dc810e39 | 2026 | bfd_vma my_offset; |
252b5132 RH |
2027 | unsigned long int tmp; |
2028 | long int ret_offset; | |
bcbdc74c NC |
2029 | struct elf_link_hash_entry * myh; |
2030 | struct elf32_arm_link_hash_table * globals; | |
252b5132 RH |
2031 | |
2032 | myh = find_thumb_glue (info, name, input_bfd); | |
2033 | if (myh == NULL) | |
b34976b6 | 2034 | return FALSE; |
252b5132 RH |
2035 | |
2036 | globals = elf32_arm_hash_table (info); | |
2037 | ||
2038 | BFD_ASSERT (globals != NULL); | |
2039 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
2040 | ||
2041 | my_offset = myh->root.u.def.value; | |
2042 | ||
2043 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, | |
2044 | THUMB2ARM_GLUE_SECTION_NAME); | |
2045 | ||
2046 | BFD_ASSERT (s != NULL); | |
2047 | BFD_ASSERT (s->contents != NULL); | |
2048 | BFD_ASSERT (s->output_section != NULL); | |
2049 | ||
2050 | if ((my_offset & 0x01) == 0x01) | |
2051 | { | |
2052 | if (sym_sec != NULL | |
2053 | && sym_sec->owner != NULL | |
2054 | && !INTERWORK_FLAG (sym_sec->owner)) | |
2055 | { | |
8f615d07 | 2056 | (*_bfd_error_handler) |
d003868e AM |
2057 | (_("%B(%s): warning: interworking not enabled.\n" |
2058 | " first occurrence: %B: thumb call to arm"), | |
2059 | sym_sec->owner, input_bfd, name); | |
252b5132 | 2060 | |
b34976b6 | 2061 | return FALSE; |
252b5132 RH |
2062 | } |
2063 | ||
2064 | --my_offset; | |
2065 | myh->root.u.def.value = my_offset; | |
2066 | ||
dc810e39 | 2067 | bfd_put_16 (output_bfd, (bfd_vma) t2a1_bx_pc_insn, |
252b5132 RH |
2068 | s->contents + my_offset); |
2069 | ||
dc810e39 | 2070 | bfd_put_16 (output_bfd, (bfd_vma) t2a2_noop_insn, |
252b5132 RH |
2071 | s->contents + my_offset + 2); |
2072 | ||
2073 | ret_offset = | |
9b485d32 NC |
2074 | /* Address of destination of the stub. */ |
2075 | ((bfd_signed_vma) val) | |
252b5132 | 2076 | - ((bfd_signed_vma) |
57e8b36a NC |
2077 | /* Offset from the start of the current section |
2078 | to the start of the stubs. */ | |
9b485d32 NC |
2079 | (s->output_offset |
2080 | /* Offset of the start of this stub from the start of the stubs. */ | |
2081 | + my_offset | |
2082 | /* Address of the start of the current section. */ | |
2083 | + s->output_section->vma) | |
2084 | /* The branch instruction is 4 bytes into the stub. */ | |
2085 | + 4 | |
2086 | /* ARM branches work from the pc of the instruction + 8. */ | |
2087 | + 8); | |
252b5132 RH |
2088 | |
2089 | bfd_put_32 (output_bfd, | |
dc810e39 | 2090 | (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF), |
252b5132 RH |
2091 | s->contents + my_offset + 4); |
2092 | } | |
2093 | ||
2094 | BFD_ASSERT (my_offset <= globals->thumb_glue_size); | |
2095 | ||
427bfd90 NC |
2096 | /* Now go back and fix up the original BL insn to point to here. */ |
2097 | ret_offset = | |
2098 | /* Address of where the stub is located. */ | |
2099 | (s->output_section->vma + s->output_offset + my_offset) | |
2100 | /* Address of where the BL is located. */ | |
57e8b36a NC |
2101 | - (input_section->output_section->vma + input_section->output_offset |
2102 | + offset) | |
427bfd90 NC |
2103 | /* Addend in the relocation. */ |
2104 | - addend | |
2105 | /* Biassing for PC-relative addressing. */ | |
2106 | - 8; | |
252b5132 RH |
2107 | |
2108 | tmp = bfd_get_32 (input_bfd, hit_data | |
2109 | - input_section->vma); | |
2110 | ||
2111 | bfd_put_32 (output_bfd, | |
dc810e39 | 2112 | (bfd_vma) insert_thumb_branch (tmp, ret_offset), |
252b5132 RH |
2113 | hit_data - input_section->vma); |
2114 | ||
b34976b6 | 2115 | return TRUE; |
252b5132 RH |
2116 | } |
2117 | ||
9b485d32 NC |
2118 | /* Arm code calling a Thumb function. */ |
2119 | ||
252b5132 | 2120 | static int |
57e8b36a NC |
2121 | elf32_arm_to_thumb_stub (struct bfd_link_info * info, |
2122 | const char * name, | |
2123 | bfd * input_bfd, | |
2124 | bfd * output_bfd, | |
2125 | asection * input_section, | |
2126 | bfd_byte * hit_data, | |
2127 | asection * sym_sec, | |
2128 | bfd_vma offset, | |
2129 | bfd_signed_vma addend, | |
2130 | bfd_vma val) | |
252b5132 RH |
2131 | { |
2132 | unsigned long int tmp; | |
dc810e39 | 2133 | bfd_vma my_offset; |
bcbdc74c | 2134 | asection * s; |
252b5132 | 2135 | long int ret_offset; |
bcbdc74c NC |
2136 | struct elf_link_hash_entry * myh; |
2137 | struct elf32_arm_link_hash_table * globals; | |
252b5132 RH |
2138 | |
2139 | myh = find_arm_glue (info, name, input_bfd); | |
2140 | if (myh == NULL) | |
b34976b6 | 2141 | return FALSE; |
252b5132 RH |
2142 | |
2143 | globals = elf32_arm_hash_table (info); | |
2144 | ||
2145 | BFD_ASSERT (globals != NULL); | |
2146 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
2147 | ||
2148 | my_offset = myh->root.u.def.value; | |
2149 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, | |
2150 | ARM2THUMB_GLUE_SECTION_NAME); | |
2151 | BFD_ASSERT (s != NULL); | |
2152 | BFD_ASSERT (s->contents != NULL); | |
2153 | BFD_ASSERT (s->output_section != NULL); | |
2154 | ||
2155 | if ((my_offset & 0x01) == 0x01) | |
2156 | { | |
2157 | if (sym_sec != NULL | |
2158 | && sym_sec->owner != NULL | |
2159 | && !INTERWORK_FLAG (sym_sec->owner)) | |
2160 | { | |
8f615d07 | 2161 | (*_bfd_error_handler) |
d003868e AM |
2162 | (_("%B(%s): warning: interworking not enabled.\n" |
2163 | " first occurrence: %B: arm call to thumb"), | |
2164 | sym_sec->owner, input_bfd, name); | |
252b5132 | 2165 | } |
9b485d32 | 2166 | |
252b5132 RH |
2167 | --my_offset; |
2168 | myh->root.u.def.value = my_offset; | |
2169 | ||
dc810e39 | 2170 | bfd_put_32 (output_bfd, (bfd_vma) a2t1_ldr_insn, |
252b5132 RH |
2171 | s->contents + my_offset); |
2172 | ||
dc810e39 | 2173 | bfd_put_32 (output_bfd, (bfd_vma) a2t2_bx_r12_insn, |
252b5132 RH |
2174 | s->contents + my_offset + 4); |
2175 | ||
2176 | /* It's a thumb address. Add the low order bit. */ | |
2177 | bfd_put_32 (output_bfd, val | a2t3_func_addr_insn, | |
2178 | s->contents + my_offset + 8); | |
2179 | } | |
2180 | ||
2181 | BFD_ASSERT (my_offset <= globals->arm_glue_size); | |
2182 | ||
2183 | tmp = bfd_get_32 (input_bfd, hit_data); | |
2184 | tmp = tmp & 0xFF000000; | |
2185 | ||
9b485d32 | 2186 | /* Somehow these are both 4 too far, so subtract 8. */ |
dc810e39 AM |
2187 | ret_offset = (s->output_offset |
2188 | + my_offset | |
2189 | + s->output_section->vma | |
2190 | - (input_section->output_offset | |
2191 | + input_section->output_section->vma | |
2192 | + offset + addend) | |
2193 | - 8); | |
9a5aca8c | 2194 | |
252b5132 RH |
2195 | tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF); |
2196 | ||
dc810e39 | 2197 | bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma); |
252b5132 | 2198 | |
b34976b6 | 2199 | return TRUE; |
252b5132 RH |
2200 | } |
2201 | ||
eb043451 PB |
2202 | |
2203 | #ifndef OLD_ARM_ABI | |
2204 | /* Some relocations map to different relocations depending on the | |
2205 | target. Return the real relocation. */ | |
2206 | static int | |
2207 | arm_real_reloc_type (struct elf32_arm_link_hash_table * globals, | |
2208 | int r_type) | |
2209 | { | |
2210 | switch (r_type) | |
2211 | { | |
2212 | case R_ARM_TARGET1: | |
2213 | if (globals->target1_is_rel) | |
2214 | return R_ARM_REL32; | |
2215 | else | |
2216 | return R_ARM_ABS32; | |
2217 | ||
2218 | case R_ARM_TARGET2: | |
2219 | return globals->target2_reloc; | |
2220 | ||
2221 | default: | |
2222 | return r_type; | |
2223 | } | |
2224 | } | |
2225 | #endif /* OLD_ARM_ABI */ | |
2226 | ||
2227 | ||
252b5132 | 2228 | /* Perform a relocation as part of a final link. */ |
9b485d32 | 2229 | |
252b5132 | 2230 | static bfd_reloc_status_type |
57e8b36a NC |
2231 | elf32_arm_final_link_relocate (reloc_howto_type * howto, |
2232 | bfd * input_bfd, | |
2233 | bfd * output_bfd, | |
2234 | asection * input_section, | |
2235 | bfd_byte * contents, | |
2236 | Elf_Internal_Rela * rel, | |
2237 | bfd_vma value, | |
2238 | struct bfd_link_info * info, | |
2239 | asection * sym_sec, | |
2240 | const char * sym_name, | |
2241 | int sym_flags, | |
2242 | struct elf_link_hash_entry * h) | |
252b5132 RH |
2243 | { |
2244 | unsigned long r_type = howto->type; | |
2245 | unsigned long r_symndx; | |
2246 | bfd_byte * hit_data = contents + rel->r_offset; | |
2247 | bfd * dynobj = NULL; | |
2248 | Elf_Internal_Shdr * symtab_hdr; | |
2249 | struct elf_link_hash_entry ** sym_hashes; | |
2250 | bfd_vma * local_got_offsets; | |
2251 | asection * sgot = NULL; | |
2252 | asection * splt = NULL; | |
2253 | asection * sreloc = NULL; | |
252b5132 | 2254 | bfd_vma addend; |
ba96a88f NC |
2255 | bfd_signed_vma signed_addend; |
2256 | struct elf32_arm_link_hash_table * globals; | |
f21f3fe0 | 2257 | |
9c504268 PB |
2258 | globals = elf32_arm_hash_table (info); |
2259 | ||
2260 | #ifndef OLD_ARM_ABI | |
2261 | /* Some relocation type map to different relocations depending on the | |
2262 | target. We pick the right one here. */ | |
eb043451 PB |
2263 | r_type = arm_real_reloc_type (globals, r_type); |
2264 | if (r_type != howto->type) | |
2265 | howto = elf32_arm_howto_from_type (r_type); | |
9c504268 PB |
2266 | #endif /* OLD_ARM_ABI */ |
2267 | ||
cac15327 NC |
2268 | /* If the start address has been set, then set the EF_ARM_HASENTRY |
2269 | flag. Setting this more than once is redundant, but the cost is | |
2270 | not too high, and it keeps the code simple. | |
99e4ae17 | 2271 | |
cac15327 NC |
2272 | The test is done here, rather than somewhere else, because the |
2273 | start address is only set just before the final link commences. | |
2274 | ||
2275 | Note - if the user deliberately sets a start address of 0, the | |
2276 | flag will not be set. */ | |
2277 | if (bfd_get_start_address (output_bfd) != 0) | |
2278 | elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY; | |
99e4ae17 | 2279 | |
252b5132 RH |
2280 | dynobj = elf_hash_table (info)->dynobj; |
2281 | if (dynobj) | |
2282 | { | |
2283 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
2284 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
2285 | } | |
2286 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; | |
2287 | sym_hashes = elf_sym_hashes (input_bfd); | |
2288 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
2289 | r_symndx = ELF32_R_SYM (rel->r_info); | |
2290 | ||
acf8aed4 | 2291 | #if USE_REL |
ba96a88f NC |
2292 | addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask; |
2293 | ||
2294 | if (addend & ((howto->src_mask + 1) >> 1)) | |
2295 | { | |
2296 | signed_addend = -1; | |
2297 | signed_addend &= ~ howto->src_mask; | |
2298 | signed_addend |= addend; | |
2299 | } | |
2300 | else | |
2301 | signed_addend = addend; | |
252b5132 | 2302 | #else |
ba96a88f | 2303 | addend = signed_addend = rel->r_addend; |
252b5132 | 2304 | #endif |
f21f3fe0 | 2305 | |
252b5132 RH |
2306 | switch (r_type) |
2307 | { | |
2308 | case R_ARM_NONE: | |
2309 | return bfd_reloc_ok; | |
2310 | ||
2311 | case R_ARM_PC24: | |
2312 | case R_ARM_ABS32: | |
2313 | case R_ARM_REL32: | |
dfc5f959 | 2314 | #ifndef OLD_ARM_ABI |
5b5bb741 PB |
2315 | case R_ARM_CALL: |
2316 | case R_ARM_JUMP24: | |
dfc5f959 | 2317 | case R_ARM_XPC25: |
eb043451 | 2318 | case R_ARM_PREL31: |
dfc5f959 | 2319 | #endif |
7359ea65 | 2320 | case R_ARM_PLT32: |
5e681ec4 PB |
2321 | /* r_symndx will be zero only for relocs against symbols |
2322 | from removed linkonce sections, or sections discarded by | |
2323 | a linker script. */ | |
2324 | if (r_symndx == 0) | |
2325 | return bfd_reloc_ok; | |
2326 | ||
7359ea65 DJ |
2327 | /* Handle relocations which should use the PLT entry. ABS32/REL32 |
2328 | will use the symbol's value, which may point to a PLT entry, but we | |
2329 | don't need to handle that here. If we created a PLT entry, all | |
2330 | branches in this object should go to it. */ | |
ee06dc07 | 2331 | if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32) |
7359ea65 | 2332 | && h != NULL |
c84cd8ee | 2333 | && splt != NULL |
7359ea65 DJ |
2334 | && h->plt.offset != (bfd_vma) -1) |
2335 | { | |
c84cd8ee DJ |
2336 | /* If we've created a .plt section, and assigned a PLT entry to |
2337 | this function, it should not be known to bind locally. If | |
2338 | it were, we would have cleared the PLT entry. */ | |
7359ea65 DJ |
2339 | BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h)); |
2340 | ||
2341 | value = (splt->output_section->vma | |
2342 | + splt->output_offset | |
2343 | + h->plt.offset); | |
2344 | return _bfd_final_link_relocate (howto, input_bfd, input_section, | |
2345 | contents, rel->r_offset, value, | |
2346 | (bfd_vma) 0); | |
2347 | } | |
2348 | ||
252b5132 | 2349 | /* When generating a shared object, these relocations are copied |
9b485d32 | 2350 | into the output file to be resolved at run time. */ |
7359ea65 DJ |
2351 | if (info->shared |
2352 | && (input_section->flags & SEC_ALLOC) | |
ee06dc07 PB |
2353 | && (r_type != R_ARM_REL32 |
2354 | || !SYMBOL_CALLS_LOCAL (info, h)) | |
7359ea65 DJ |
2355 | && (h == NULL |
2356 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
2357 | || h->root.type != bfd_link_hash_undefweak) | |
2358 | && r_type != R_ARM_PC24 | |
5b5bb741 PB |
2359 | #ifndef OLD_ARM_ABI |
2360 | && r_type != R_ARM_CALL | |
2361 | && r_type != R_ARM_JUMP24 | |
ee06dc07 | 2362 | && r_type != R_ARM_PREL31 |
5b5bb741 | 2363 | #endif |
7359ea65 | 2364 | && r_type != R_ARM_PLT32) |
252b5132 | 2365 | { |
947216bf AM |
2366 | Elf_Internal_Rela outrel; |
2367 | bfd_byte *loc; | |
b34976b6 | 2368 | bfd_boolean skip, relocate; |
f21f3fe0 | 2369 | |
252b5132 RH |
2370 | if (sreloc == NULL) |
2371 | { | |
2372 | const char * name; | |
f21f3fe0 | 2373 | |
252b5132 RH |
2374 | name = (bfd_elf_string_from_elf_section |
2375 | (input_bfd, | |
2376 | elf_elfheader (input_bfd)->e_shstrndx, | |
2377 | elf_section_data (input_section)->rel_hdr.sh_name)); | |
2378 | if (name == NULL) | |
2379 | return bfd_reloc_notsupported; | |
f21f3fe0 | 2380 | |
252b5132 RH |
2381 | BFD_ASSERT (strncmp (name, ".rel", 4) == 0 |
2382 | && strcmp (bfd_get_section_name (input_bfd, | |
2383 | input_section), | |
2384 | name + 4) == 0); | |
f21f3fe0 | 2385 | |
252b5132 RH |
2386 | sreloc = bfd_get_section_by_name (dynobj, name); |
2387 | BFD_ASSERT (sreloc != NULL); | |
2388 | } | |
f21f3fe0 | 2389 | |
b34976b6 AM |
2390 | skip = FALSE; |
2391 | relocate = FALSE; | |
f21f3fe0 | 2392 | |
c629eae0 JJ |
2393 | outrel.r_offset = |
2394 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
2395 | rel->r_offset); | |
2396 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 2397 | skip = TRUE; |
0bb2d96a | 2398 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 2399 | skip = TRUE, relocate = TRUE; |
252b5132 RH |
2400 | outrel.r_offset += (input_section->output_section->vma |
2401 | + input_section->output_offset); | |
f21f3fe0 | 2402 | |
252b5132 | 2403 | if (skip) |
0bb2d96a | 2404 | memset (&outrel, 0, sizeof outrel); |
5e681ec4 PB |
2405 | else if (h != NULL |
2406 | && h->dynindx != -1 | |
7359ea65 | 2407 | && (!info->shared |
5e681ec4 | 2408 | || !info->symbolic |
f5385ebf | 2409 | || !h->def_regular)) |
5e681ec4 | 2410 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
252b5132 RH |
2411 | else |
2412 | { | |
a16385dc MM |
2413 | int symbol; |
2414 | ||
5e681ec4 PB |
2415 | /* This symbol is local, or marked to become local. */ |
2416 | relocate = TRUE; | |
b7693d02 DJ |
2417 | if (sym_flags == STT_ARM_TFUNC) |
2418 | value |= 1; | |
a16385dc | 2419 | if (globals->symbian_p) |
6366ff1e MM |
2420 | { |
2421 | /* On Symbian OS, the data segment and text segement | |
2422 | can be relocated independently. Therefore, we | |
2423 | must indicate the segment to which this | |
2424 | relocation is relative. The BPABI allows us to | |
2425 | use any symbol in the right segment; we just use | |
2426 | the section symbol as it is convenient. (We | |
2427 | cannot use the symbol given by "h" directly as it | |
2428 | will not appear in the dynamic symbol table.) */ | |
2429 | symbol = elf_section_data (sym_sec->output_section)->dynindx; | |
2430 | BFD_ASSERT (symbol != 0); | |
2431 | } | |
a16385dc MM |
2432 | else |
2433 | /* On SVR4-ish systems, the dynamic loader cannot | |
2434 | relocate the text and data segments independently, | |
2435 | so the symbol does not matter. */ | |
2436 | symbol = 0; | |
2437 | outrel.r_info = ELF32_R_INFO (symbol, R_ARM_RELATIVE); | |
252b5132 | 2438 | } |
f21f3fe0 | 2439 | |
947216bf AM |
2440 | loc = sreloc->contents; |
2441 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel); | |
2442 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); | |
9a5aca8c | 2443 | |
f21f3fe0 | 2444 | /* If this reloc is against an external symbol, we do not want to |
252b5132 | 2445 | fiddle with the addend. Otherwise, we need to include the symbol |
9b485d32 | 2446 | value so that it becomes an addend for the dynamic reloc. */ |
252b5132 RH |
2447 | if (! relocate) |
2448 | return bfd_reloc_ok; | |
9a5aca8c | 2449 | |
f21f3fe0 | 2450 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
252b5132 RH |
2451 | contents, rel->r_offset, value, |
2452 | (bfd_vma) 0); | |
2453 | } | |
2454 | else switch (r_type) | |
2455 | { | |
dfc5f959 NC |
2456 | #ifndef OLD_ARM_ABI |
2457 | case R_ARM_XPC25: /* Arm BLX instruction. */ | |
5b5bb741 PB |
2458 | case R_ARM_CALL: |
2459 | case R_ARM_JUMP24: | |
dfc5f959 NC |
2460 | #endif |
2461 | case R_ARM_PC24: /* Arm B/BL instruction */ | |
7359ea65 | 2462 | case R_ARM_PLT32: |
dfc5f959 NC |
2463 | #ifndef OLD_ARM_ABI |
2464 | if (r_type == R_ARM_XPC25) | |
252b5132 | 2465 | { |
dfc5f959 NC |
2466 | /* Check for Arm calling Arm function. */ |
2467 | /* FIXME: Should we translate the instruction into a BL | |
2468 | instruction instead ? */ | |
2469 | if (sym_flags != STT_ARM_TFUNC) | |
d003868e AM |
2470 | (*_bfd_error_handler) |
2471 | (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."), | |
2472 | input_bfd, | |
2473 | h ? h->root.root.string : "(local)"); | |
dfc5f959 NC |
2474 | } |
2475 | else | |
2476 | #endif | |
2477 | { | |
2478 | /* Check for Arm calling Thumb function. */ | |
2479 | if (sym_flags == STT_ARM_TFUNC) | |
2480 | { | |
57e8b36a NC |
2481 | elf32_arm_to_thumb_stub (info, sym_name, input_bfd, |
2482 | output_bfd, input_section, | |
2483 | hit_data, sym_sec, rel->r_offset, | |
dfc5f959 NC |
2484 | signed_addend, value); |
2485 | return bfd_reloc_ok; | |
2486 | } | |
252b5132 | 2487 | } |
ba96a88f | 2488 | |
dea514f5 PB |
2489 | /* The ARM ELF ABI says that this reloc is computed as: S - P + A |
2490 | where: | |
2491 | S is the address of the symbol in the relocation. | |
2492 | P is address of the instruction being relocated. | |
2493 | A is the addend (extracted from the instruction) in bytes. | |
2494 | ||
2495 | S is held in 'value'. | |
2496 | P is the base address of the section containing the | |
2497 | instruction plus the offset of the reloc into that | |
2498 | section, ie: | |
2499 | (input_section->output_section->vma + | |
2500 | input_section->output_offset + | |
2501 | rel->r_offset). | |
2502 | A is the addend, converted into bytes, ie: | |
2503 | (signed_addend * 4) | |
2504 | ||
2505 | Note: None of these operations have knowledge of the pipeline | |
2506 | size of the processor, thus it is up to the assembler to | |
2507 | encode this information into the addend. */ | |
2508 | value -= (input_section->output_section->vma | |
2509 | + input_section->output_offset); | |
2510 | value -= rel->r_offset; | |
2511 | value += (signed_addend << howto->size); | |
23080146 | 2512 | |
dcb5e6e6 NC |
2513 | signed_addend = value; |
2514 | signed_addend >>= howto->rightshift; | |
9a5aca8c | 2515 | |
59f2c4e7 NC |
2516 | /* It is not an error for an undefined weak reference to be |
2517 | out of range. Any program that branches to such a symbol | |
9a5aca8c AM |
2518 | is going to crash anyway, so there is no point worrying |
2519 | about getting the destination exactly right. */ | |
59f2c4e7 NC |
2520 | if (! h || h->root.type != bfd_link_hash_undefweak) |
2521 | { | |
9b485d32 | 2522 | /* Perform a signed range check. */ |
dcb5e6e6 | 2523 | if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1)) |
59f2c4e7 NC |
2524 | || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1))) |
2525 | return bfd_reloc_overflow; | |
2526 | } | |
9a5aca8c | 2527 | |
dcb5e6e6 NC |
2528 | #ifndef OLD_ARM_ABI |
2529 | /* If necessary set the H bit in the BLX instruction. */ | |
2530 | if (r_type == R_ARM_XPC25 && ((value & 2) == 2)) | |
2531 | value = (signed_addend & howto->dst_mask) | |
2532 | | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask)) | |
2533 | | (1 << 24); | |
2534 | else | |
2535 | #endif | |
2536 | value = (signed_addend & howto->dst_mask) | |
2537 | | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask)); | |
252b5132 | 2538 | break; |
f21f3fe0 | 2539 | |
252b5132 RH |
2540 | case R_ARM_ABS32: |
2541 | value += addend; | |
2542 | if (sym_flags == STT_ARM_TFUNC) | |
2543 | value |= 1; | |
2544 | break; | |
f21f3fe0 | 2545 | |
252b5132 RH |
2546 | case R_ARM_REL32: |
2547 | value -= (input_section->output_section->vma | |
62efb346 | 2548 | + input_section->output_offset + rel->r_offset); |
252b5132 RH |
2549 | value += addend; |
2550 | break; | |
eb043451 PB |
2551 | |
2552 | #ifndef OLD_ARM_ABI | |
2553 | case R_ARM_PREL31: | |
2554 | value -= (input_section->output_section->vma | |
2555 | + input_section->output_offset + rel->r_offset); | |
2556 | value += signed_addend; | |
2557 | if (! h || h->root.type != bfd_link_hash_undefweak) | |
2558 | { | |
2559 | /* Check for overflow */ | |
2560 | if ((value ^ (value >> 1)) & (1 << 30)) | |
2561 | return bfd_reloc_overflow; | |
2562 | } | |
2563 | value &= 0x7fffffff; | |
2564 | value |= (bfd_get_32 (input_bfd, hit_data) & 0x80000000); | |
2565 | if (sym_flags == STT_ARM_TFUNC) | |
2566 | value |= 1; | |
2567 | break; | |
2568 | #endif | |
252b5132 | 2569 | } |
f21f3fe0 | 2570 | |
252b5132 RH |
2571 | bfd_put_32 (input_bfd, value, hit_data); |
2572 | return bfd_reloc_ok; | |
2573 | ||
2574 | case R_ARM_ABS8: | |
2575 | value += addend; | |
2576 | if ((long) value > 0x7f || (long) value < -0x80) | |
2577 | return bfd_reloc_overflow; | |
2578 | ||
2579 | bfd_put_8 (input_bfd, value, hit_data); | |
2580 | return bfd_reloc_ok; | |
2581 | ||
2582 | case R_ARM_ABS16: | |
2583 | value += addend; | |
2584 | ||
2585 | if ((long) value > 0x7fff || (long) value < -0x8000) | |
2586 | return bfd_reloc_overflow; | |
2587 | ||
2588 | bfd_put_16 (input_bfd, value, hit_data); | |
2589 | return bfd_reloc_ok; | |
2590 | ||
2591 | case R_ARM_ABS12: | |
2592 | /* Support ldr and str instruction for the arm */ | |
2593 | /* Also thumb b (unconditional branch). ??? Really? */ | |
2594 | value += addend; | |
2595 | ||
2596 | if ((long) value > 0x7ff || (long) value < -0x800) | |
2597 | return bfd_reloc_overflow; | |
2598 | ||
2599 | value |= (bfd_get_32 (input_bfd, hit_data) & 0xfffff000); | |
2600 | bfd_put_32 (input_bfd, value, hit_data); | |
2601 | return bfd_reloc_ok; | |
2602 | ||
2603 | case R_ARM_THM_ABS5: | |
9b485d32 | 2604 | /* Support ldr and str instructions for the thumb. */ |
acf8aed4 | 2605 | #if USE_REL |
252b5132 RH |
2606 | /* Need to refetch addend. */ |
2607 | addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask; | |
2608 | /* ??? Need to determine shift amount from operand size. */ | |
2609 | addend >>= howto->rightshift; | |
2610 | #endif | |
2611 | value += addend; | |
2612 | ||
2613 | /* ??? Isn't value unsigned? */ | |
2614 | if ((long) value > 0x1f || (long) value < -0x10) | |
2615 | return bfd_reloc_overflow; | |
2616 | ||
2617 | /* ??? Value needs to be properly shifted into place first. */ | |
2618 | value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f; | |
2619 | bfd_put_16 (input_bfd, value, hit_data); | |
2620 | return bfd_reloc_ok; | |
2621 | ||
dfc5f959 NC |
2622 | #ifndef OLD_ARM_ABI |
2623 | case R_ARM_THM_XPC22: | |
2624 | #endif | |
252b5132 | 2625 | case R_ARM_THM_PC22: |
dfc5f959 | 2626 | /* Thumb BL (branch long instruction). */ |
252b5132 | 2627 | { |
b34976b6 AM |
2628 | bfd_vma relocation; |
2629 | bfd_boolean overflow = FALSE; | |
2630 | bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data); | |
2631 | bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2); | |
df212a7e | 2632 | bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift; |
ba96a88f | 2633 | bfd_signed_vma reloc_signed_min = ~ reloc_signed_max; |
b34976b6 | 2634 | bfd_vma check; |
252b5132 | 2635 | bfd_signed_vma signed_check; |
252b5132 | 2636 | |
acf8aed4 | 2637 | #if USE_REL |
252b5132 RH |
2638 | /* Need to refetch the addend and squish the two 11 bit pieces |
2639 | together. */ | |
2640 | { | |
ba96a88f NC |
2641 | bfd_vma upper = upper_insn & 0x7ff; |
2642 | bfd_vma lower = lower_insn & 0x7ff; | |
9b485d32 | 2643 | upper = (upper ^ 0x400) - 0x400; /* Sign extend. */ |
252b5132 | 2644 | addend = (upper << 12) | (lower << 1); |
ba96a88f | 2645 | signed_addend = addend; |
252b5132 RH |
2646 | } |
2647 | #endif | |
dfc5f959 NC |
2648 | #ifndef OLD_ARM_ABI |
2649 | if (r_type == R_ARM_THM_XPC22) | |
2650 | { | |
2651 | /* Check for Thumb to Thumb call. */ | |
2652 | /* FIXME: Should we translate the instruction into a BL | |
2653 | instruction instead ? */ | |
2654 | if (sym_flags == STT_ARM_TFUNC) | |
d003868e AM |
2655 | (*_bfd_error_handler) |
2656 | (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."), | |
2657 | input_bfd, | |
2658 | h ? h->root.root.string : "(local)"); | |
dfc5f959 NC |
2659 | } |
2660 | else | |
2661 | #endif | |
252b5132 | 2662 | { |
dfc5f959 NC |
2663 | /* If it is not a call to Thumb, assume call to Arm. |
2664 | If it is a call relative to a section name, then it is not a | |
b7693d02 DJ |
2665 | function call at all, but rather a long jump. Calls through |
2666 | the PLT do not require stubs. */ | |
2667 | if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION | |
2668 | && (h == NULL || splt == NULL | |
2669 | || h->plt.offset == (bfd_vma) -1)) | |
dfc5f959 NC |
2670 | { |
2671 | if (elf32_thumb_to_arm_stub | |
2672 | (info, sym_name, input_bfd, output_bfd, input_section, | |
2673 | hit_data, sym_sec, rel->r_offset, signed_addend, value)) | |
2674 | return bfd_reloc_ok; | |
2675 | else | |
2676 | return bfd_reloc_dangerous; | |
2677 | } | |
252b5132 | 2678 | } |
f21f3fe0 | 2679 | |
b7693d02 DJ |
2680 | /* Handle calls via the PLT. */ |
2681 | if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1) | |
2682 | { | |
2683 | value = (splt->output_section->vma | |
2684 | + splt->output_offset | |
2685 | + h->plt.offset); | |
2686 | /* Target the Thumb stub before the ARM PLT entry. */ | |
2687 | value -= 4; | |
2688 | } | |
2689 | ||
ba96a88f | 2690 | relocation = value + signed_addend; |
f21f3fe0 | 2691 | |
252b5132 | 2692 | relocation -= (input_section->output_section->vma |
ba96a88f NC |
2693 | + input_section->output_offset |
2694 | + rel->r_offset); | |
9a5aca8c | 2695 | |
252b5132 RH |
2696 | check = relocation >> howto->rightshift; |
2697 | ||
2698 | /* If this is a signed value, the rightshift just dropped | |
2699 | leading 1 bits (assuming twos complement). */ | |
2700 | if ((bfd_signed_vma) relocation >= 0) | |
2701 | signed_check = check; | |
2702 | else | |
2703 | signed_check = check | ~((bfd_vma) -1 >> howto->rightshift); | |
2704 | ||
252b5132 | 2705 | /* Assumes two's complement. */ |
ba96a88f | 2706 | if (signed_check > reloc_signed_max || signed_check < reloc_signed_min) |
b34976b6 | 2707 | overflow = TRUE; |
252b5132 | 2708 | |
df425bc0 | 2709 | #ifndef OLD_ARM_ABI |
4f3c3dbb NC |
2710 | if (r_type == R_ARM_THM_XPC22 |
2711 | && ((lower_insn & 0x1800) == 0x0800)) | |
c62e1cc3 NC |
2712 | /* For a BLX instruction, make sure that the relocation is rounded up |
2713 | to a word boundary. This follows the semantics of the instruction | |
2714 | which specifies that bit 1 of the target address will come from bit | |
2715 | 1 of the base address. */ | |
2716 | relocation = (relocation + 2) & ~ 3; | |
99e4ae17 | 2717 | #endif |
c62e1cc3 NC |
2718 | /* Put RELOCATION back into the insn. */ |
2719 | upper_insn = (upper_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 12) & 0x7ff); | |
2720 | lower_insn = (lower_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 1) & 0x7ff); | |
2721 | ||
252b5132 RH |
2722 | /* Put the relocated value back in the object file: */ |
2723 | bfd_put_16 (input_bfd, upper_insn, hit_data); | |
2724 | bfd_put_16 (input_bfd, lower_insn, hit_data + 2); | |
2725 | ||
2726 | return (overflow ? bfd_reloc_overflow : bfd_reloc_ok); | |
2727 | } | |
2728 | break; | |
2729 | ||
51c5503b NC |
2730 | case R_ARM_THM_PC11: |
2731 | /* Thumb B (branch) instruction). */ | |
2732 | { | |
6cf9e9fe | 2733 | bfd_signed_vma relocation; |
51c5503b NC |
2734 | bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1; |
2735 | bfd_signed_vma reloc_signed_min = ~ reloc_signed_max; | |
51c5503b NC |
2736 | bfd_signed_vma signed_check; |
2737 | ||
acf8aed4 | 2738 | #if USE_REL |
51c5503b NC |
2739 | /* Need to refetch addend. */ |
2740 | addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask; | |
6cf9e9fe NC |
2741 | if (addend & ((howto->src_mask + 1) >> 1)) |
2742 | { | |
2743 | signed_addend = -1; | |
2744 | signed_addend &= ~ howto->src_mask; | |
2745 | signed_addend |= addend; | |
2746 | } | |
2747 | else | |
2748 | signed_addend = addend; | |
2749 | /* The value in the insn has been right shifted. We need to | |
2750 | undo this, so that we can perform the address calculation | |
2751 | in terms of bytes. */ | |
2752 | signed_addend <<= howto->rightshift; | |
51c5503b | 2753 | #endif |
6cf9e9fe | 2754 | relocation = value + signed_addend; |
51c5503b NC |
2755 | |
2756 | relocation -= (input_section->output_section->vma | |
2757 | + input_section->output_offset | |
2758 | + rel->r_offset); | |
2759 | ||
6cf9e9fe NC |
2760 | relocation >>= howto->rightshift; |
2761 | signed_check = relocation; | |
2762 | relocation &= howto->dst_mask; | |
51c5503b | 2763 | relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask)); |
cedb70c5 | 2764 | |
51c5503b NC |
2765 | bfd_put_16 (input_bfd, relocation, hit_data); |
2766 | ||
2767 | /* Assumes two's complement. */ | |
2768 | if (signed_check > reloc_signed_max || signed_check < reloc_signed_min) | |
2769 | return bfd_reloc_overflow; | |
2770 | ||
2771 | return bfd_reloc_ok; | |
2772 | } | |
cedb70c5 | 2773 | |
1f433d93 | 2774 | #ifndef OLD_ARM_ABI |
8375c36b PB |
2775 | case R_ARM_ALU_PCREL7_0: |
2776 | case R_ARM_ALU_PCREL15_8: | |
2777 | case R_ARM_ALU_PCREL23_15: | |
2778 | { | |
2779 | bfd_vma insn; | |
2780 | bfd_vma relocation; | |
2781 | ||
2782 | insn = bfd_get_32 (input_bfd, hit_data); | |
2783 | #if USE_REL | |
2784 | /* Extract the addend. */ | |
2785 | addend = (insn & 0xff) << ((insn & 0xf00) >> 7); | |
2786 | signed_addend = addend; | |
2787 | #endif | |
2788 | relocation = value + signed_addend; | |
2789 | ||
2790 | relocation -= (input_section->output_section->vma | |
2791 | + input_section->output_offset | |
2792 | + rel->r_offset); | |
2793 | insn = (insn & ~0xfff) | |
2794 | | ((howto->bitpos << 7) & 0xf00) | |
2795 | | ((relocation >> howto->bitpos) & 0xff); | |
2796 | bfd_put_32 (input_bfd, value, hit_data); | |
2797 | } | |
2798 | return bfd_reloc_ok; | |
1f433d93 | 2799 | #endif |
8375c36b | 2800 | |
252b5132 RH |
2801 | case R_ARM_GNU_VTINHERIT: |
2802 | case R_ARM_GNU_VTENTRY: | |
2803 | return bfd_reloc_ok; | |
2804 | ||
2805 | case R_ARM_COPY: | |
2806 | return bfd_reloc_notsupported; | |
2807 | ||
2808 | case R_ARM_GLOB_DAT: | |
2809 | return bfd_reloc_notsupported; | |
2810 | ||
2811 | case R_ARM_JUMP_SLOT: | |
2812 | return bfd_reloc_notsupported; | |
2813 | ||
2814 | case R_ARM_RELATIVE: | |
2815 | return bfd_reloc_notsupported; | |
2816 | ||
2817 | case R_ARM_GOTOFF: | |
2818 | /* Relocation is relative to the start of the | |
2819 | global offset table. */ | |
2820 | ||
2821 | BFD_ASSERT (sgot != NULL); | |
2822 | if (sgot == NULL) | |
2823 | return bfd_reloc_notsupported; | |
9a5aca8c | 2824 | |
cedb70c5 | 2825 | /* If we are addressing a Thumb function, we need to adjust the |
ee29b9fb RE |
2826 | address by one, so that attempts to call the function pointer will |
2827 | correctly interpret it as Thumb code. */ | |
2828 | if (sym_flags == STT_ARM_TFUNC) | |
2829 | value += 1; | |
2830 | ||
252b5132 RH |
2831 | /* Note that sgot->output_offset is not involved in this |
2832 | calculation. We always want the start of .got. If we | |
2833 | define _GLOBAL_OFFSET_TABLE in a different way, as is | |
2834 | permitted by the ABI, we might have to change this | |
9b485d32 | 2835 | calculation. */ |
252b5132 | 2836 | value -= sgot->output_section->vma; |
f21f3fe0 | 2837 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
99e4ae17 AJ |
2838 | contents, rel->r_offset, value, |
2839 | (bfd_vma) 0); | |
252b5132 RH |
2840 | |
2841 | case R_ARM_GOTPC: | |
a7c10850 | 2842 | /* Use global offset table as symbol value. */ |
252b5132 | 2843 | BFD_ASSERT (sgot != NULL); |
f21f3fe0 | 2844 | |
252b5132 RH |
2845 | if (sgot == NULL) |
2846 | return bfd_reloc_notsupported; | |
2847 | ||
2848 | value = sgot->output_section->vma; | |
f21f3fe0 | 2849 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
99e4ae17 AJ |
2850 | contents, rel->r_offset, value, |
2851 | (bfd_vma) 0); | |
f21f3fe0 | 2852 | |
252b5132 | 2853 | case R_ARM_GOT32: |
eb043451 PB |
2854 | #ifndef OLD_ARM_ABI |
2855 | case R_ARM_GOT_PREL: | |
2856 | #endif | |
252b5132 | 2857 | /* Relocation is to the entry for this symbol in the |
9b485d32 | 2858 | global offset table. */ |
252b5132 RH |
2859 | if (sgot == NULL) |
2860 | return bfd_reloc_notsupported; | |
f21f3fe0 | 2861 | |
252b5132 RH |
2862 | if (h != NULL) |
2863 | { | |
2864 | bfd_vma off; | |
5e681ec4 | 2865 | bfd_boolean dyn; |
f21f3fe0 | 2866 | |
252b5132 RH |
2867 | off = h->got.offset; |
2868 | BFD_ASSERT (off != (bfd_vma) -1); | |
5e681ec4 | 2869 | dyn = globals->root.dynamic_sections_created; |
f21f3fe0 | 2870 | |
5e681ec4 | 2871 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
50d6c878 | 2872 | || (info->shared |
5e681ec4 PB |
2873 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
2874 | || (ELF_ST_VISIBILITY (h->other) | |
2875 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
2876 | { |
2877 | /* This is actually a static link, or it is a -Bsymbolic link | |
2878 | and the symbol is defined locally. We must initialize this | |
2879 | entry in the global offset table. Since the offset must | |
2880 | always be a multiple of 4, we use the least significant bit | |
2881 | to record whether we have initialized it already. | |
f21f3fe0 | 2882 | |
252b5132 | 2883 | When doing a dynamic link, we create a .rel.got relocation |
f21f3fe0 | 2884 | entry to initialize the value. This is done in the |
9b485d32 | 2885 | finish_dynamic_symbol routine. */ |
252b5132 RH |
2886 | if ((off & 1) != 0) |
2887 | off &= ~1; | |
2888 | else | |
2889 | { | |
ee29b9fb RE |
2890 | /* If we are addressing a Thumb function, we need to |
2891 | adjust the address by one, so that attempts to | |
2892 | call the function pointer will correctly | |
2893 | interpret it as Thumb code. */ | |
2894 | if (sym_flags == STT_ARM_TFUNC) | |
2895 | value |= 1; | |
2896 | ||
252b5132 RH |
2897 | bfd_put_32 (output_bfd, value, sgot->contents + off); |
2898 | h->got.offset |= 1; | |
2899 | } | |
2900 | } | |
f21f3fe0 | 2901 | |
252b5132 RH |
2902 | value = sgot->output_offset + off; |
2903 | } | |
2904 | else | |
2905 | { | |
2906 | bfd_vma off; | |
f21f3fe0 | 2907 | |
252b5132 RH |
2908 | BFD_ASSERT (local_got_offsets != NULL && |
2909 | local_got_offsets[r_symndx] != (bfd_vma) -1); | |
f21f3fe0 | 2910 | |
252b5132 | 2911 | off = local_got_offsets[r_symndx]; |
f21f3fe0 | 2912 | |
252b5132 RH |
2913 | /* The offset must always be a multiple of 4. We use the |
2914 | least significant bit to record whether we have already | |
9b485d32 | 2915 | generated the necessary reloc. */ |
252b5132 RH |
2916 | if ((off & 1) != 0) |
2917 | off &= ~1; | |
2918 | else | |
2919 | { | |
b7693d02 DJ |
2920 | /* If we are addressing a Thumb function, we need to |
2921 | adjust the address by one, so that attempts to | |
2922 | call the function pointer will correctly | |
2923 | interpret it as Thumb code. */ | |
2924 | if (sym_flags == STT_ARM_TFUNC) | |
2925 | value |= 1; | |
2926 | ||
252b5132 | 2927 | bfd_put_32 (output_bfd, value, sgot->contents + off); |
f21f3fe0 | 2928 | |
252b5132 RH |
2929 | if (info->shared) |
2930 | { | |
2931 | asection * srelgot; | |
947216bf AM |
2932 | Elf_Internal_Rela outrel; |
2933 | bfd_byte *loc; | |
f21f3fe0 | 2934 | |
252b5132 RH |
2935 | srelgot = bfd_get_section_by_name (dynobj, ".rel.got"); |
2936 | BFD_ASSERT (srelgot != NULL); | |
f21f3fe0 | 2937 | |
252b5132 | 2938 | outrel.r_offset = (sgot->output_section->vma |
f21f3fe0 | 2939 | + sgot->output_offset |
252b5132 RH |
2940 | + off); |
2941 | outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE); | |
947216bf AM |
2942 | loc = srelgot->contents; |
2943 | loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rel); | |
2944 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); | |
252b5132 | 2945 | } |
f21f3fe0 | 2946 | |
252b5132 RH |
2947 | local_got_offsets[r_symndx] |= 1; |
2948 | } | |
f21f3fe0 | 2949 | |
252b5132 RH |
2950 | value = sgot->output_offset + off; |
2951 | } | |
eb043451 PB |
2952 | if (r_type != R_ARM_GOT32) |
2953 | value += sgot->output_section->vma; | |
9a5aca8c | 2954 | |
f21f3fe0 | 2955 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
99e4ae17 AJ |
2956 | contents, rel->r_offset, value, |
2957 | (bfd_vma) 0); | |
f21f3fe0 | 2958 | |
252b5132 RH |
2959 | case R_ARM_SBREL32: |
2960 | return bfd_reloc_notsupported; | |
2961 | ||
2962 | case R_ARM_AMP_VCALL9: | |
2963 | return bfd_reloc_notsupported; | |
2964 | ||
2965 | case R_ARM_RSBREL32: | |
2966 | return bfd_reloc_notsupported; | |
2967 | ||
2968 | case R_ARM_THM_RPC22: | |
2969 | return bfd_reloc_notsupported; | |
2970 | ||
2971 | case R_ARM_RREL32: | |
2972 | return bfd_reloc_notsupported; | |
2973 | ||
2974 | case R_ARM_RABS32: | |
2975 | return bfd_reloc_notsupported; | |
2976 | ||
2977 | case R_ARM_RPC24: | |
2978 | return bfd_reloc_notsupported; | |
2979 | ||
2980 | case R_ARM_RBASE: | |
2981 | return bfd_reloc_notsupported; | |
2982 | ||
2983 | default: | |
2984 | return bfd_reloc_notsupported; | |
2985 | } | |
2986 | } | |
2987 | ||
acf8aed4 | 2988 | #if USE_REL |
98c1d4aa NC |
2989 | /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */ |
2990 | static void | |
57e8b36a NC |
2991 | arm_add_to_rel (bfd * abfd, |
2992 | bfd_byte * address, | |
2993 | reloc_howto_type * howto, | |
2994 | bfd_signed_vma increment) | |
98c1d4aa | 2995 | { |
98c1d4aa NC |
2996 | bfd_signed_vma addend; |
2997 | ||
9a5aca8c | 2998 | if (howto->type == R_ARM_THM_PC22) |
98c1d4aa | 2999 | { |
9a5aca8c AM |
3000 | int upper_insn, lower_insn; |
3001 | int upper, lower; | |
98c1d4aa | 3002 | |
9a5aca8c AM |
3003 | upper_insn = bfd_get_16 (abfd, address); |
3004 | lower_insn = bfd_get_16 (abfd, address + 2); | |
3005 | upper = upper_insn & 0x7ff; | |
3006 | lower = lower_insn & 0x7ff; | |
3007 | ||
3008 | addend = (upper << 12) | (lower << 1); | |
ddda4409 | 3009 | addend += increment; |
9a5aca8c | 3010 | addend >>= 1; |
98c1d4aa | 3011 | |
9a5aca8c AM |
3012 | upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff); |
3013 | lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff); | |
3014 | ||
dc810e39 AM |
3015 | bfd_put_16 (abfd, (bfd_vma) upper_insn, address); |
3016 | bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2); | |
9a5aca8c AM |
3017 | } |
3018 | else | |
3019 | { | |
3020 | bfd_vma contents; | |
3021 | ||
3022 | contents = bfd_get_32 (abfd, address); | |
3023 | ||
3024 | /* Get the (signed) value from the instruction. */ | |
3025 | addend = contents & howto->src_mask; | |
3026 | if (addend & ((howto->src_mask + 1) >> 1)) | |
3027 | { | |
3028 | bfd_signed_vma mask; | |
3029 | ||
3030 | mask = -1; | |
3031 | mask &= ~ howto->src_mask; | |
3032 | addend |= mask; | |
3033 | } | |
3034 | ||
3035 | /* Add in the increment, (which is a byte value). */ | |
3036 | switch (howto->type) | |
3037 | { | |
3038 | default: | |
3039 | addend += increment; | |
3040 | break; | |
3041 | ||
3042 | case R_ARM_PC24: | |
5b5bb741 PB |
3043 | #ifndef OLD_ARM_ABI |
3044 | case R_ARM_CALL: | |
3045 | case R_ARM_JUMP24: | |
3046 | #endif | |
9a5aca8c | 3047 | addend <<= howto->size; |
dc810e39 | 3048 | addend += increment; |
9a5aca8c AM |
3049 | |
3050 | /* Should we check for overflow here ? */ | |
3051 | ||
3052 | /* Drop any undesired bits. */ | |
3053 | addend >>= howto->rightshift; | |
3054 | break; | |
3055 | } | |
3056 | ||
3057 | contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask); | |
3058 | ||
3059 | bfd_put_32 (abfd, contents, address); | |
ddda4409 | 3060 | } |
98c1d4aa NC |
3061 | } |
3062 | #endif /* USE_REL */ | |
252b5132 RH |
3063 | |
3064 | /* Relocate an ARM ELF section. */ | |
b34976b6 | 3065 | static bfd_boolean |
57e8b36a NC |
3066 | elf32_arm_relocate_section (bfd * output_bfd, |
3067 | struct bfd_link_info * info, | |
3068 | bfd * input_bfd, | |
3069 | asection * input_section, | |
3070 | bfd_byte * contents, | |
3071 | Elf_Internal_Rela * relocs, | |
3072 | Elf_Internal_Sym * local_syms, | |
3073 | asection ** local_sections) | |
252b5132 | 3074 | { |
b34976b6 AM |
3075 | Elf_Internal_Shdr *symtab_hdr; |
3076 | struct elf_link_hash_entry **sym_hashes; | |
3077 | Elf_Internal_Rela *rel; | |
3078 | Elf_Internal_Rela *relend; | |
3079 | const char *name; | |
b32d3aa2 | 3080 | struct elf32_arm_link_hash_table * globals; |
252b5132 | 3081 | |
acf8aed4 | 3082 | #if !USE_REL |
1049f94e | 3083 | if (info->relocatable) |
b34976b6 | 3084 | return TRUE; |
b491616a AM |
3085 | #endif |
3086 | ||
b32d3aa2 | 3087 | globals = elf32_arm_hash_table (info); |
252b5132 RH |
3088 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
3089 | sym_hashes = elf_sym_hashes (input_bfd); | |
3090 | ||
3091 | rel = relocs; | |
3092 | relend = relocs + input_section->reloc_count; | |
3093 | for (; rel < relend; rel++) | |
3094 | { | |
ba96a88f NC |
3095 | int r_type; |
3096 | reloc_howto_type * howto; | |
3097 | unsigned long r_symndx; | |
3098 | Elf_Internal_Sym * sym; | |
3099 | asection * sec; | |
252b5132 | 3100 | struct elf_link_hash_entry * h; |
ba96a88f NC |
3101 | bfd_vma relocation; |
3102 | bfd_reloc_status_type r; | |
3103 | arelent bfd_reloc; | |
f21f3fe0 | 3104 | |
252b5132 | 3105 | r_symndx = ELF32_R_SYM (rel->r_info); |
ba96a88f | 3106 | r_type = ELF32_R_TYPE (rel->r_info); |
b32d3aa2 | 3107 | r_type = arm_real_reloc_type (globals, r_type); |
252b5132 | 3108 | |
ba96a88f NC |
3109 | if ( r_type == R_ARM_GNU_VTENTRY |
3110 | || r_type == R_ARM_GNU_VTINHERIT) | |
252b5132 RH |
3111 | continue; |
3112 | ||
b32d3aa2 | 3113 | bfd_reloc.howto = elf32_arm_howto_from_type (r_type); |
ba96a88f | 3114 | howto = bfd_reloc.howto; |
252b5132 | 3115 | |
acf8aed4 | 3116 | #if USE_REL |
1049f94e | 3117 | if (info->relocatable) |
252b5132 | 3118 | { |
1049f94e | 3119 | /* This is a relocatable link. We don't have to change |
252b5132 RH |
3120 | anything, unless the reloc is against a section symbol, |
3121 | in which case we have to adjust according to where the | |
3122 | section symbol winds up in the output section. */ | |
3123 | if (r_symndx < symtab_hdr->sh_info) | |
3124 | { | |
3125 | sym = local_syms + r_symndx; | |
3126 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
3127 | { | |
3128 | sec = local_sections[r_symndx]; | |
98c1d4aa | 3129 | arm_add_to_rel (input_bfd, contents + rel->r_offset, |
dc810e39 AM |
3130 | howto, |
3131 | (bfd_signed_vma) (sec->output_offset | |
3132 | + sym->st_value)); | |
252b5132 RH |
3133 | } |
3134 | } | |
3135 | ||
3136 | continue; | |
3137 | } | |
b491616a | 3138 | #endif |
252b5132 RH |
3139 | |
3140 | /* This is a final link. */ | |
3141 | h = NULL; | |
3142 | sym = NULL; | |
3143 | sec = NULL; | |
9b485d32 | 3144 | |
252b5132 RH |
3145 | if (r_symndx < symtab_hdr->sh_info) |
3146 | { | |
3147 | sym = local_syms + r_symndx; | |
3148 | sec = local_sections[r_symndx]; | |
acf8aed4 | 3149 | #if USE_REL |
252b5132 RH |
3150 | relocation = (sec->output_section->vma |
3151 | + sec->output_offset | |
3152 | + sym->st_value); | |
f8df10f4 JJ |
3153 | if ((sec->flags & SEC_MERGE) |
3154 | && ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
3155 | { | |
3156 | asection *msec; | |
3157 | bfd_vma addend, value; | |
3158 | ||
3159 | if (howto->rightshift) | |
3160 | { | |
3161 | (*_bfd_error_handler) | |
d003868e AM |
3162 | (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"), |
3163 | input_bfd, input_section, | |
f8df10f4 | 3164 | (long) rel->r_offset, howto->name); |
b34976b6 | 3165 | return FALSE; |
f8df10f4 JJ |
3166 | } |
3167 | ||
3168 | value = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
3169 | ||
3170 | /* Get the (signed) value from the instruction. */ | |
3171 | addend = value & howto->src_mask; | |
3172 | if (addend & ((howto->src_mask + 1) >> 1)) | |
3173 | { | |
3174 | bfd_signed_vma mask; | |
3175 | ||
3176 | mask = -1; | |
3177 | mask &= ~ howto->src_mask; | |
3178 | addend |= mask; | |
3179 | } | |
3180 | msec = sec; | |
3181 | addend = | |
c629eae0 | 3182 | _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend) |
f8df10f4 JJ |
3183 | - relocation; |
3184 | addend += msec->output_section->vma + msec->output_offset; | |
3185 | value = (value & ~ howto->dst_mask) | (addend & howto->dst_mask); | |
3186 | bfd_put_32 (input_bfd, value, contents + rel->r_offset); | |
3187 | } | |
3188 | #else | |
8517fae7 | 3189 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
f8df10f4 | 3190 | #endif |
252b5132 RH |
3191 | } |
3192 | else | |
3193 | { | |
560e09e9 NC |
3194 | bfd_boolean warned; |
3195 | bfd_boolean unresolved_reloc; | |
3196 | ||
b2a8e766 AM |
3197 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
3198 | r_symndx, symtab_hdr, sym_hashes, | |
3199 | h, sec, relocation, | |
3200 | unresolved_reloc, warned); | |
57e8b36a | 3201 | |
560e09e9 | 3202 | if (unresolved_reloc || relocation != 0) |
252b5132 | 3203 | { |
252b5132 | 3204 | /* In these cases, we don't need the relocation value. |
f21f3fe0 | 3205 | We check specially because in some obscure cases |
9b485d32 | 3206 | sec->output_section will be NULL. */ |
252b5132 RH |
3207 | switch (r_type) |
3208 | { | |
3209 | case R_ARM_PC24: | |
5b5bb741 PB |
3210 | #ifndef OLD_ARM_ABI |
3211 | case R_ARM_CALL: | |
3212 | case R_ARM_JUMP24: | |
ee06dc07 | 3213 | case R_ARM_PREL31: |
5b5bb741 | 3214 | #endif |
252b5132 | 3215 | case R_ARM_ABS32: |
6a360bf4 | 3216 | case R_ARM_THM_PC22: |
ecb2d096 DJ |
3217 | case R_ARM_PLT32: |
3218 | ||
252b5132 | 3219 | if (info->shared |
f5385ebf AM |
3220 | && ((!info->symbolic && h->dynindx != -1) |
3221 | || !h->def_regular) | |
5e681ec4 | 3222 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
05924f36 PB |
3223 | && ((input_section->flags & SEC_ALLOC) != 0 |
3224 | /* DWARF will emit R_ARM_ABS32 relocations in its | |
3225 | sections against symbols defined externally | |
3226 | in shared libraries. We can't do anything | |
3227 | with them here. */ | |
3228 | || ((input_section->flags & SEC_DEBUGGING) != 0 | |
f5385ebf | 3229 | && h->def_dynamic)) |
252b5132 | 3230 | ) |
560e09e9 | 3231 | relocation = 0; |
252b5132 | 3232 | break; |
f21f3fe0 | 3233 | |
252b5132 | 3234 | case R_ARM_GOTPC: |
560e09e9 | 3235 | relocation = 0; |
252b5132 | 3236 | break; |
f21f3fe0 | 3237 | |
252b5132 | 3238 | case R_ARM_GOT32: |
eb043451 PB |
3239 | #ifndef OLD_ARM_ABI |
3240 | case R_ARM_GOT_PREL: | |
3241 | #endif | |
50d6c878 | 3242 | if ((WILL_CALL_FINISH_DYNAMIC_SYMBOL |
560e09e9 | 3243 | (elf_hash_table (info)->dynamic_sections_created, |
50d6c878 DJ |
3244 | info->shared, h)) |
3245 | && (!info->shared | |
252b5132 | 3246 | || (!info->symbolic && h->dynindx != -1) |
f5385ebf | 3247 | || !h->def_regular)) |
560e09e9 | 3248 | relocation = 0; |
252b5132 | 3249 | break; |
f21f3fe0 | 3250 | |
252b5132 | 3251 | default: |
560e09e9 NC |
3252 | if (unresolved_reloc) |
3253 | _bfd_error_handler | |
d003868e AM |
3254 | (_("%B(%A): warning: unresolvable relocation %d against symbol `%s'"), |
3255 | input_bfd, input_section, | |
560e09e9 | 3256 | r_type, |
d003868e | 3257 | h->root.root.string); |
560e09e9 | 3258 | break; |
252b5132 | 3259 | } |
252b5132 RH |
3260 | } |
3261 | } | |
3262 | ||
3263 | if (h != NULL) | |
3264 | name = h->root.root.string; | |
3265 | else | |
3266 | { | |
3267 | name = (bfd_elf_string_from_elf_section | |
3268 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); | |
3269 | if (name == NULL || *name == '\0') | |
3270 | name = bfd_section_name (input_bfd, sec); | |
3271 | } | |
f21f3fe0 | 3272 | |
252b5132 RH |
3273 | r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd, |
3274 | input_section, contents, rel, | |
3275 | relocation, info, sec, name, | |
3276 | (h ? ELF_ST_TYPE (h->type) : | |
780a67af | 3277 | ELF_ST_TYPE (sym->st_info)), h); |
252b5132 RH |
3278 | |
3279 | if (r != bfd_reloc_ok) | |
3280 | { | |
3281 | const char * msg = (const char *) 0; | |
3282 | ||
3283 | switch (r) | |
3284 | { | |
3285 | case bfd_reloc_overflow: | |
cf919dfd PB |
3286 | /* If the overflowing reloc was to an undefined symbol, |
3287 | we have already printed one error message and there | |
3288 | is no point complaining again. */ | |
3289 | if ((! h || | |
3290 | h->root.type != bfd_link_hash_undefined) | |
3291 | && (!((*info->callbacks->reloc_overflow) | |
dfeffb9f L |
3292 | (info, (h ? &h->root : NULL), name, howto->name, |
3293 | (bfd_vma) 0, input_bfd, input_section, | |
3294 | rel->r_offset)))) | |
b34976b6 | 3295 | return FALSE; |
252b5132 RH |
3296 | break; |
3297 | ||
3298 | case bfd_reloc_undefined: | |
3299 | if (!((*info->callbacks->undefined_symbol) | |
3300 | (info, name, input_bfd, input_section, | |
b34976b6 AM |
3301 | rel->r_offset, TRUE))) |
3302 | return FALSE; | |
252b5132 RH |
3303 | break; |
3304 | ||
3305 | case bfd_reloc_outofrange: | |
9b485d32 | 3306 | msg = _("internal error: out of range error"); |
252b5132 RH |
3307 | goto common_error; |
3308 | ||
3309 | case bfd_reloc_notsupported: | |
9b485d32 | 3310 | msg = _("internal error: unsupported relocation error"); |
252b5132 RH |
3311 | goto common_error; |
3312 | ||
3313 | case bfd_reloc_dangerous: | |
9b485d32 | 3314 | msg = _("internal error: dangerous error"); |
252b5132 RH |
3315 | goto common_error; |
3316 | ||
3317 | default: | |
9b485d32 | 3318 | msg = _("internal error: unknown error"); |
252b5132 RH |
3319 | /* fall through */ |
3320 | ||
3321 | common_error: | |
3322 | if (!((*info->callbacks->warning) | |
3323 | (info, msg, name, input_bfd, input_section, | |
3324 | rel->r_offset))) | |
b34976b6 | 3325 | return FALSE; |
252b5132 RH |
3326 | break; |
3327 | } | |
3328 | } | |
3329 | } | |
3330 | ||
b34976b6 | 3331 | return TRUE; |
252b5132 RH |
3332 | } |
3333 | ||
c178919b NC |
3334 | /* Set the right machine number. */ |
3335 | ||
3336 | static bfd_boolean | |
57e8b36a | 3337 | elf32_arm_object_p (bfd *abfd) |
c178919b | 3338 | { |
5a6c6817 | 3339 | unsigned int mach; |
57e8b36a | 3340 | |
5a6c6817 | 3341 | mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION); |
c178919b | 3342 | |
5a6c6817 NC |
3343 | if (mach != bfd_mach_arm_unknown) |
3344 | bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach); | |
3345 | ||
3346 | else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT) | |
3347 | bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312); | |
e16bb312 | 3348 | |
e16bb312 | 3349 | else |
5a6c6817 | 3350 | bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach); |
c178919b NC |
3351 | |
3352 | return TRUE; | |
3353 | } | |
3354 | ||
fc830a83 | 3355 | /* Function to keep ARM specific flags in the ELF header. */ |
3c9458e9 | 3356 | |
b34976b6 | 3357 | static bfd_boolean |
57e8b36a | 3358 | elf32_arm_set_private_flags (bfd *abfd, flagword flags) |
252b5132 RH |
3359 | { |
3360 | if (elf_flags_init (abfd) | |
3361 | && elf_elfheader (abfd)->e_flags != flags) | |
3362 | { | |
fc830a83 NC |
3363 | if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN) |
3364 | { | |
fd2ec330 | 3365 | if (flags & EF_ARM_INTERWORK) |
d003868e AM |
3366 | (*_bfd_error_handler) |
3367 | (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"), | |
3368 | abfd); | |
fc830a83 | 3369 | else |
d003868e AM |
3370 | _bfd_error_handler |
3371 | (_("Warning: Clearing the interworking flag of %B due to outside request"), | |
3372 | abfd); | |
fc830a83 | 3373 | } |
252b5132 RH |
3374 | } |
3375 | else | |
3376 | { | |
3377 | elf_elfheader (abfd)->e_flags = flags; | |
b34976b6 | 3378 | elf_flags_init (abfd) = TRUE; |
252b5132 RH |
3379 | } |
3380 | ||
b34976b6 | 3381 | return TRUE; |
252b5132 RH |
3382 | } |
3383 | ||
fc830a83 | 3384 | /* Copy backend specific data from one object module to another. */ |
9b485d32 | 3385 | |
b34976b6 | 3386 | static bfd_boolean |
57e8b36a | 3387 | elf32_arm_copy_private_bfd_data (bfd *ibfd, bfd *obfd) |
252b5132 RH |
3388 | { |
3389 | flagword in_flags; | |
3390 | flagword out_flags; | |
3391 | ||
fc830a83 | 3392 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
252b5132 | 3393 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
b34976b6 | 3394 | return TRUE; |
252b5132 | 3395 | |
fc830a83 | 3396 | in_flags = elf_elfheader (ibfd)->e_flags; |
252b5132 RH |
3397 | out_flags = elf_elfheader (obfd)->e_flags; |
3398 | ||
fc830a83 NC |
3399 | if (elf_flags_init (obfd) |
3400 | && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN | |
3401 | && in_flags != out_flags) | |
252b5132 | 3402 | { |
252b5132 | 3403 | /* Cannot mix APCS26 and APCS32 code. */ |
fd2ec330 | 3404 | if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26)) |
b34976b6 | 3405 | return FALSE; |
252b5132 RH |
3406 | |
3407 | /* Cannot mix float APCS and non-float APCS code. */ | |
fd2ec330 | 3408 | if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT)) |
b34976b6 | 3409 | return FALSE; |
252b5132 RH |
3410 | |
3411 | /* If the src and dest have different interworking flags | |
3412 | then turn off the interworking bit. */ | |
fd2ec330 | 3413 | if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK)) |
252b5132 | 3414 | { |
fd2ec330 | 3415 | if (out_flags & EF_ARM_INTERWORK) |
d003868e AM |
3416 | _bfd_error_handler |
3417 | (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"), | |
3418 | obfd, ibfd); | |
252b5132 | 3419 | |
fd2ec330 | 3420 | in_flags &= ~EF_ARM_INTERWORK; |
252b5132 | 3421 | } |
1006ba19 PB |
3422 | |
3423 | /* Likewise for PIC, though don't warn for this case. */ | |
fd2ec330 PB |
3424 | if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC)) |
3425 | in_flags &= ~EF_ARM_PIC; | |
252b5132 RH |
3426 | } |
3427 | ||
3428 | elf_elfheader (obfd)->e_flags = in_flags; | |
b34976b6 | 3429 | elf_flags_init (obfd) = TRUE; |
252b5132 | 3430 | |
94a3258f PB |
3431 | /* Also copy the EI_OSABI field. */ |
3432 | elf_elfheader (obfd)->e_ident[EI_OSABI] = | |
3433 | elf_elfheader (ibfd)->e_ident[EI_OSABI]; | |
3434 | ||
b34976b6 | 3435 | return TRUE; |
252b5132 RH |
3436 | } |
3437 | ||
3438 | /* Merge backend specific data from an object file to the output | |
3439 | object file when linking. */ | |
9b485d32 | 3440 | |
b34976b6 | 3441 | static bfd_boolean |
57e8b36a | 3442 | elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd) |
252b5132 RH |
3443 | { |
3444 | flagword out_flags; | |
3445 | flagword in_flags; | |
b34976b6 | 3446 | bfd_boolean flags_compatible = TRUE; |
cf919dfd | 3447 | asection *sec; |
252b5132 | 3448 | |
9b485d32 | 3449 | /* Check if we have the same endianess. */ |
82e51918 | 3450 | if (! _bfd_generic_verify_endian_match (ibfd, obfd)) |
b34976b6 | 3451 | return FALSE; |
1fe494a5 | 3452 | |
252b5132 RH |
3453 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
3454 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
b34976b6 | 3455 | return TRUE; |
252b5132 | 3456 | |
252b5132 RH |
3457 | /* The input BFD must have had its flags initialised. */ |
3458 | /* The following seems bogus to me -- The flags are initialized in | |
3459 | the assembler but I don't think an elf_flags_init field is | |
9b485d32 | 3460 | written into the object. */ |
252b5132 RH |
3461 | /* BFD_ASSERT (elf_flags_init (ibfd)); */ |
3462 | ||
3463 | in_flags = elf_elfheader (ibfd)->e_flags; | |
3464 | out_flags = elf_elfheader (obfd)->e_flags; | |
3465 | ||
3466 | if (!elf_flags_init (obfd)) | |
3467 | { | |
fe077fa6 NC |
3468 | /* If the input is the default architecture and had the default |
3469 | flags then do not bother setting the flags for the output | |
3470 | architecture, instead allow future merges to do this. If no | |
3471 | future merges ever set these flags then they will retain their | |
3472 | uninitialised values, which surprise surprise, correspond | |
252b5132 | 3473 | to the default values. */ |
fe077fa6 NC |
3474 | if (bfd_get_arch_info (ibfd)->the_default |
3475 | && elf_elfheader (ibfd)->e_flags == 0) | |
b34976b6 | 3476 | return TRUE; |
252b5132 | 3477 | |
b34976b6 | 3478 | elf_flags_init (obfd) = TRUE; |
252b5132 RH |
3479 | elf_elfheader (obfd)->e_flags = in_flags; |
3480 | ||
3481 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) | |
3482 | && bfd_get_arch_info (obfd)->the_default) | |
3483 | return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd)); | |
3484 | ||
b34976b6 | 3485 | return TRUE; |
252b5132 RH |
3486 | } |
3487 | ||
5a6c6817 NC |
3488 | /* Determine what should happen if the input ARM architecture |
3489 | does not match the output ARM architecture. */ | |
3490 | if (! bfd_arm_merge_machines (ibfd, obfd)) | |
3491 | return FALSE; | |
e16bb312 | 3492 | |
1006ba19 | 3493 | /* Identical flags must be compatible. */ |
252b5132 | 3494 | if (in_flags == out_flags) |
b34976b6 | 3495 | return TRUE; |
252b5132 | 3496 | |
35a0f415 DJ |
3497 | /* Check to see if the input BFD actually contains any sections. If |
3498 | not, its flags may not have been initialised either, but it | |
3499 | cannot actually cause any incompatibility. Do not short-circuit | |
3500 | dynamic objects; their section list may be emptied by | |
d1f161ea | 3501 | elf_link_add_object_symbols. |
35a0f415 | 3502 | |
d1f161ea NC |
3503 | Also check to see if there are no code sections in the input. |
3504 | In this case there is no need to check for code specific flags. | |
3505 | XXX - do we need to worry about floating-point format compatability | |
3506 | in data sections ? */ | |
35a0f415 | 3507 | if (!(ibfd->flags & DYNAMIC)) |
cf919dfd | 3508 | { |
35a0f415 | 3509 | bfd_boolean null_input_bfd = TRUE; |
d1f161ea | 3510 | bfd_boolean only_data_sections = TRUE; |
35a0f415 DJ |
3511 | |
3512 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) | |
cf919dfd | 3513 | { |
35a0f415 DJ |
3514 | /* Ignore synthetic glue sections. */ |
3515 | if (strcmp (sec->name, ".glue_7") | |
3516 | && strcmp (sec->name, ".glue_7t")) | |
3517 | { | |
d1f161ea NC |
3518 | if ((bfd_get_section_flags (ibfd, sec) |
3519 | & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) | |
3520 | == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) | |
3521 | only_data_sections = FALSE; | |
3522 | ||
35a0f415 DJ |
3523 | null_input_bfd = FALSE; |
3524 | break; | |
3525 | } | |
cf919dfd | 3526 | } |
d1f161ea NC |
3527 | |
3528 | if (null_input_bfd || only_data_sections) | |
35a0f415 | 3529 | return TRUE; |
cf919dfd | 3530 | } |
cf919dfd | 3531 | |
252b5132 | 3532 | /* Complain about various flag mismatches. */ |
fc830a83 NC |
3533 | if (EF_ARM_EABI_VERSION (in_flags) != EF_ARM_EABI_VERSION (out_flags)) |
3534 | { | |
d003868e | 3535 | _bfd_error_handler |
3656d5e3 | 3536 | (_("ERROR: Source object %B has EABI version %d, but target %B has EABI version %d"), |
d003868e AM |
3537 | ibfd, obfd, |
3538 | (in_flags & EF_ARM_EABIMASK) >> 24, | |
3539 | (out_flags & EF_ARM_EABIMASK) >> 24); | |
b34976b6 | 3540 | return FALSE; |
fc830a83 | 3541 | } |
252b5132 | 3542 | |
1006ba19 PB |
3543 | /* Not sure what needs to be checked for EABI versions >= 1. */ |
3544 | if (EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN) | |
3545 | { | |
fd2ec330 | 3546 | if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26)) |
1006ba19 | 3547 | { |
d003868e AM |
3548 | _bfd_error_handler |
3549 | (_("ERROR: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"), | |
3550 | ibfd, obfd, | |
3551 | in_flags & EF_ARM_APCS_26 ? 26 : 32, | |
3552 | out_flags & EF_ARM_APCS_26 ? 26 : 32); | |
b34976b6 | 3553 | flags_compatible = FALSE; |
1006ba19 | 3554 | } |
252b5132 | 3555 | |
fd2ec330 | 3556 | if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT)) |
1006ba19 | 3557 | { |
5eefb65f | 3558 | if (in_flags & EF_ARM_APCS_FLOAT) |
d003868e AM |
3559 | _bfd_error_handler |
3560 | (_("ERROR: %B passes floats in float registers, whereas %B passes them in integer registers"), | |
3561 | ibfd, obfd); | |
5eefb65f | 3562 | else |
d003868e AM |
3563 | _bfd_error_handler |
3564 | (_("ERROR: %B passes floats in integer registers, whereas %B passes them in float registers"), | |
3565 | ibfd, obfd); | |
63b0f745 | 3566 | |
b34976b6 | 3567 | flags_compatible = FALSE; |
1006ba19 | 3568 | } |
252b5132 | 3569 | |
96a846ea | 3570 | if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT)) |
1006ba19 | 3571 | { |
96a846ea | 3572 | if (in_flags & EF_ARM_VFP_FLOAT) |
d003868e AM |
3573 | _bfd_error_handler |
3574 | (_("ERROR: %B uses VFP instructions, whereas %B does not"), | |
3575 | ibfd, obfd); | |
5eefb65f | 3576 | else |
d003868e AM |
3577 | _bfd_error_handler |
3578 | (_("ERROR: %B uses FPA instructions, whereas %B does not"), | |
3579 | ibfd, obfd); | |
fde78edd NC |
3580 | |
3581 | flags_compatible = FALSE; | |
3582 | } | |
3583 | ||
3584 | if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT)) | |
3585 | { | |
3586 | if (in_flags & EF_ARM_MAVERICK_FLOAT) | |
d003868e AM |
3587 | _bfd_error_handler |
3588 | (_("ERROR: %B uses Maverick instructions, whereas %B does not"), | |
3589 | ibfd, obfd); | |
fde78edd | 3590 | else |
d003868e AM |
3591 | _bfd_error_handler |
3592 | (_("ERROR: %B does not use Maverick instructions, whereas %B does"), | |
3593 | ibfd, obfd); | |
63b0f745 | 3594 | |
b34976b6 | 3595 | flags_compatible = FALSE; |
1006ba19 | 3596 | } |
96a846ea RE |
3597 | |
3598 | #ifdef EF_ARM_SOFT_FLOAT | |
3599 | if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT)) | |
3600 | { | |
3601 | /* We can allow interworking between code that is VFP format | |
3602 | layout, and uses either soft float or integer regs for | |
3603 | passing floating point arguments and results. We already | |
3604 | know that the APCS_FLOAT flags match; similarly for VFP | |
3605 | flags. */ | |
3606 | if ((in_flags & EF_ARM_APCS_FLOAT) != 0 | |
3607 | || (in_flags & EF_ARM_VFP_FLOAT) == 0) | |
3608 | { | |
3609 | if (in_flags & EF_ARM_SOFT_FLOAT) | |
d003868e AM |
3610 | _bfd_error_handler |
3611 | (_("ERROR: %B uses software FP, whereas %B uses hardware FP"), | |
3612 | ibfd, obfd); | |
96a846ea | 3613 | else |
d003868e AM |
3614 | _bfd_error_handler |
3615 | (_("ERROR: %B uses hardware FP, whereas %B uses software FP"), | |
3616 | ibfd, obfd); | |
96a846ea | 3617 | |
b34976b6 | 3618 | flags_compatible = FALSE; |
96a846ea RE |
3619 | } |
3620 | } | |
ee43f35e | 3621 | #endif |
252b5132 | 3622 | |
1006ba19 | 3623 | /* Interworking mismatch is only a warning. */ |
fd2ec330 | 3624 | if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK)) |
8f615d07 | 3625 | { |
e3c8793a NC |
3626 | if (in_flags & EF_ARM_INTERWORK) |
3627 | { | |
d003868e AM |
3628 | _bfd_error_handler |
3629 | (_("Warning: %B supports interworking, whereas %B does not"), | |
3630 | ibfd, obfd); | |
e3c8793a NC |
3631 | } |
3632 | else | |
3633 | { | |
d003868e AM |
3634 | _bfd_error_handler |
3635 | (_("Warning: %B does not support interworking, whereas %B does"), | |
3636 | ibfd, obfd); | |
e3c8793a | 3637 | } |
8f615d07 | 3638 | } |
252b5132 | 3639 | } |
63b0f745 | 3640 | |
1006ba19 | 3641 | return flags_compatible; |
252b5132 RH |
3642 | } |
3643 | ||
9b485d32 NC |
3644 | /* Display the flags field. */ |
3645 | ||
b34976b6 | 3646 | static bfd_boolean |
57e8b36a | 3647 | elf32_arm_print_private_bfd_data (bfd *abfd, void * ptr) |
252b5132 | 3648 | { |
fc830a83 NC |
3649 | FILE * file = (FILE *) ptr; |
3650 | unsigned long flags; | |
252b5132 RH |
3651 | |
3652 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
3653 | ||
3654 | /* Print normal ELF private data. */ | |
3655 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
3656 | ||
fc830a83 | 3657 | flags = elf_elfheader (abfd)->e_flags; |
9b485d32 NC |
3658 | /* Ignore init flag - it may not be set, despite the flags field |
3659 | containing valid data. */ | |
252b5132 RH |
3660 | |
3661 | /* xgettext:c-format */ | |
9b485d32 | 3662 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); |
252b5132 | 3663 | |
fc830a83 NC |
3664 | switch (EF_ARM_EABI_VERSION (flags)) |
3665 | { | |
3666 | case EF_ARM_EABI_UNKNOWN: | |
4cc11e76 | 3667 | /* The following flag bits are GNU extensions and not part of the |
fc830a83 NC |
3668 | official ARM ELF extended ABI. Hence they are only decoded if |
3669 | the EABI version is not set. */ | |
fd2ec330 | 3670 | if (flags & EF_ARM_INTERWORK) |
9b485d32 | 3671 | fprintf (file, _(" [interworking enabled]")); |
9a5aca8c | 3672 | |
fd2ec330 | 3673 | if (flags & EF_ARM_APCS_26) |
6c571f00 | 3674 | fprintf (file, " [APCS-26]"); |
fc830a83 | 3675 | else |
6c571f00 | 3676 | fprintf (file, " [APCS-32]"); |
9a5aca8c | 3677 | |
96a846ea RE |
3678 | if (flags & EF_ARM_VFP_FLOAT) |
3679 | fprintf (file, _(" [VFP float format]")); | |
fde78edd NC |
3680 | else if (flags & EF_ARM_MAVERICK_FLOAT) |
3681 | fprintf (file, _(" [Maverick float format]")); | |
96a846ea RE |
3682 | else |
3683 | fprintf (file, _(" [FPA float format]")); | |
3684 | ||
fd2ec330 | 3685 | if (flags & EF_ARM_APCS_FLOAT) |
9b485d32 | 3686 | fprintf (file, _(" [floats passed in float registers]")); |
9a5aca8c | 3687 | |
fd2ec330 | 3688 | if (flags & EF_ARM_PIC) |
9b485d32 | 3689 | fprintf (file, _(" [position independent]")); |
fc830a83 | 3690 | |
fd2ec330 | 3691 | if (flags & EF_ARM_NEW_ABI) |
9b485d32 | 3692 | fprintf (file, _(" [new ABI]")); |
9a5aca8c | 3693 | |
fd2ec330 | 3694 | if (flags & EF_ARM_OLD_ABI) |
9b485d32 | 3695 | fprintf (file, _(" [old ABI]")); |
9a5aca8c | 3696 | |
fd2ec330 | 3697 | if (flags & EF_ARM_SOFT_FLOAT) |
9b485d32 | 3698 | fprintf (file, _(" [software FP]")); |
9a5aca8c | 3699 | |
96a846ea RE |
3700 | flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT |
3701 | | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI | |
fde78edd NC |
3702 | | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT |
3703 | | EF_ARM_MAVERICK_FLOAT); | |
fc830a83 | 3704 | break; |
9a5aca8c | 3705 | |
fc830a83 | 3706 | case EF_ARM_EABI_VER1: |
9b485d32 | 3707 | fprintf (file, _(" [Version1 EABI]")); |
9a5aca8c | 3708 | |
fc830a83 | 3709 | if (flags & EF_ARM_SYMSARESORTED) |
9b485d32 | 3710 | fprintf (file, _(" [sorted symbol table]")); |
fc830a83 | 3711 | else |
9b485d32 | 3712 | fprintf (file, _(" [unsorted symbol table]")); |
9a5aca8c | 3713 | |
fc830a83 NC |
3714 | flags &= ~ EF_ARM_SYMSARESORTED; |
3715 | break; | |
9a5aca8c | 3716 | |
fd2ec330 PB |
3717 | case EF_ARM_EABI_VER2: |
3718 | fprintf (file, _(" [Version2 EABI]")); | |
3719 | ||
3720 | if (flags & EF_ARM_SYMSARESORTED) | |
3721 | fprintf (file, _(" [sorted symbol table]")); | |
3722 | else | |
3723 | fprintf (file, _(" [unsorted symbol table]")); | |
3724 | ||
3725 | if (flags & EF_ARM_DYNSYMSUSESEGIDX) | |
3726 | fprintf (file, _(" [dynamic symbols use segment index]")); | |
3727 | ||
3728 | if (flags & EF_ARM_MAPSYMSFIRST) | |
3729 | fprintf (file, _(" [mapping symbols precede others]")); | |
3730 | ||
99e4ae17 | 3731 | flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX |
fd2ec330 PB |
3732 | | EF_ARM_MAPSYMSFIRST); |
3733 | break; | |
3734 | ||
d507cf36 PB |
3735 | case EF_ARM_EABI_VER3: |
3736 | fprintf (file, _(" [Version3 EABI]")); | |
8cb51566 PB |
3737 | break; |
3738 | ||
3739 | case EF_ARM_EABI_VER4: | |
3740 | fprintf (file, _(" [Version4 EABI]")); | |
d507cf36 PB |
3741 | |
3742 | if (flags & EF_ARM_BE8) | |
3743 | fprintf (file, _(" [BE8]")); | |
3744 | ||
3745 | if (flags & EF_ARM_LE8) | |
3746 | fprintf (file, _(" [LE8]")); | |
3747 | ||
3748 | flags &= ~(EF_ARM_LE8 | EF_ARM_BE8); | |
3749 | break; | |
3750 | ||
fc830a83 | 3751 | default: |
9b485d32 | 3752 | fprintf (file, _(" <EABI version unrecognised>")); |
fc830a83 NC |
3753 | break; |
3754 | } | |
252b5132 | 3755 | |
fc830a83 | 3756 | flags &= ~ EF_ARM_EABIMASK; |
252b5132 | 3757 | |
fc830a83 | 3758 | if (flags & EF_ARM_RELEXEC) |
9b485d32 | 3759 | fprintf (file, _(" [relocatable executable]")); |
252b5132 | 3760 | |
fc830a83 | 3761 | if (flags & EF_ARM_HASENTRY) |
9b485d32 | 3762 | fprintf (file, _(" [has entry point]")); |
252b5132 | 3763 | |
fc830a83 NC |
3764 | flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY); |
3765 | ||
3766 | if (flags) | |
9b485d32 | 3767 | fprintf (file, _("<Unrecognised flag bits set>")); |
9a5aca8c | 3768 | |
252b5132 RH |
3769 | fputc ('\n', file); |
3770 | ||
b34976b6 | 3771 | return TRUE; |
252b5132 RH |
3772 | } |
3773 | ||
3774 | static int | |
57e8b36a | 3775 | elf32_arm_get_symbol_type (Elf_Internal_Sym * elf_sym, int type) |
252b5132 | 3776 | { |
2f0ca46a NC |
3777 | switch (ELF_ST_TYPE (elf_sym->st_info)) |
3778 | { | |
3779 | case STT_ARM_TFUNC: | |
3780 | return ELF_ST_TYPE (elf_sym->st_info); | |
ce855c42 | 3781 | |
2f0ca46a NC |
3782 | case STT_ARM_16BIT: |
3783 | /* If the symbol is not an object, return the STT_ARM_16BIT flag. | |
3784 | This allows us to distinguish between data used by Thumb instructions | |
3785 | and non-data (which is probably code) inside Thumb regions of an | |
3786 | executable. */ | |
3787 | if (type != STT_OBJECT) | |
3788 | return ELF_ST_TYPE (elf_sym->st_info); | |
3789 | break; | |
9a5aca8c | 3790 | |
ce855c42 NC |
3791 | default: |
3792 | break; | |
2f0ca46a NC |
3793 | } |
3794 | ||
3795 | return type; | |
252b5132 | 3796 | } |
f21f3fe0 | 3797 | |
252b5132 | 3798 | static asection * |
57e8b36a NC |
3799 | elf32_arm_gc_mark_hook (asection * sec, |
3800 | struct bfd_link_info * info ATTRIBUTE_UNUSED, | |
3801 | Elf_Internal_Rela * rel, | |
3802 | struct elf_link_hash_entry * h, | |
3803 | Elf_Internal_Sym * sym) | |
252b5132 RH |
3804 | { |
3805 | if (h != NULL) | |
3806 | { | |
3807 | switch (ELF32_R_TYPE (rel->r_info)) | |
3808 | { | |
3809 | case R_ARM_GNU_VTINHERIT: | |
3810 | case R_ARM_GNU_VTENTRY: | |
3811 | break; | |
3812 | ||
3813 | default: | |
3814 | switch (h->root.type) | |
3815 | { | |
3816 | case bfd_link_hash_defined: | |
3817 | case bfd_link_hash_defweak: | |
3818 | return h->root.u.def.section; | |
3819 | ||
3820 | case bfd_link_hash_common: | |
3821 | return h->root.u.c.p->section; | |
e049a0de ILT |
3822 | |
3823 | default: | |
3824 | break; | |
252b5132 RH |
3825 | } |
3826 | } | |
3827 | } | |
3828 | else | |
1e2f5b6e | 3829 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
9ad5cbcf | 3830 | |
252b5132 RH |
3831 | return NULL; |
3832 | } | |
3833 | ||
780a67af NC |
3834 | /* Update the got entry reference counts for the section being removed. */ |
3835 | ||
b34976b6 | 3836 | static bfd_boolean |
57e8b36a NC |
3837 | elf32_arm_gc_sweep_hook (bfd * abfd ATTRIBUTE_UNUSED, |
3838 | struct bfd_link_info * info ATTRIBUTE_UNUSED, | |
3839 | asection * sec ATTRIBUTE_UNUSED, | |
3840 | const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED) | |
252b5132 | 3841 | { |
5e681ec4 PB |
3842 | Elf_Internal_Shdr *symtab_hdr; |
3843 | struct elf_link_hash_entry **sym_hashes; | |
3844 | bfd_signed_vma *local_got_refcounts; | |
3845 | const Elf_Internal_Rela *rel, *relend; | |
3846 | unsigned long r_symndx; | |
3847 | struct elf_link_hash_entry *h; | |
eb043451 PB |
3848 | struct elf32_arm_link_hash_table * globals; |
3849 | ||
3850 | globals = elf32_arm_hash_table (info); | |
5e681ec4 PB |
3851 | |
3852 | elf_section_data (sec)->local_dynrel = NULL; | |
3853 | ||
3854 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
3855 | sym_hashes = elf_sym_hashes (abfd); | |
3856 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
3857 | ||
3858 | relend = relocs + sec->reloc_count; | |
3859 | for (rel = relocs; rel < relend; rel++) | |
eb043451 PB |
3860 | { |
3861 | int r_type; | |
5e681ec4 | 3862 | |
eb043451 | 3863 | r_type = ELF32_R_TYPE (rel->r_info); |
b6ee372a | 3864 | #ifndef OLD_ARM_ABI |
eb043451 | 3865 | r_type = arm_real_reloc_type (globals, r_type); |
b6ee372a | 3866 | #endif |
eb043451 PB |
3867 | switch (r_type) |
3868 | { | |
3869 | case R_ARM_GOT32: | |
3870 | #ifndef OLD_ARM_ABI | |
3871 | case R_ARM_GOT_PREL: | |
3872 | #endif | |
3873 | r_symndx = ELF32_R_SYM (rel->r_info); | |
3874 | if (r_symndx >= symtab_hdr->sh_info) | |
3875 | { | |
3876 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
3877 | if (h->got.refcount > 0) | |
3878 | h->got.refcount -= 1; | |
3879 | } | |
3880 | else if (local_got_refcounts != NULL) | |
3881 | { | |
3882 | if (local_got_refcounts[r_symndx] > 0) | |
3883 | local_got_refcounts[r_symndx] -= 1; | |
3884 | } | |
3885 | break; | |
3886 | ||
3887 | case R_ARM_ABS32: | |
3888 | case R_ARM_REL32: | |
3889 | case R_ARM_PC24: | |
3890 | case R_ARM_PLT32: | |
3891 | #ifndef OLD_ARM_ABI | |
5b5bb741 PB |
3892 | case R_ARM_CALL: |
3893 | case R_ARM_JUMP24: | |
eb043451 PB |
3894 | case R_ARM_PREL31: |
3895 | #endif | |
b7693d02 DJ |
3896 | case R_ARM_THM_PC22: |
3897 | /* Should the interworking branches be here also? */ | |
3898 | ||
eb043451 PB |
3899 | r_symndx = ELF32_R_SYM (rel->r_info); |
3900 | if (r_symndx >= symtab_hdr->sh_info) | |
3901 | { | |
3902 | struct elf32_arm_link_hash_entry *eh; | |
3903 | struct elf32_arm_relocs_copied **pp; | |
3904 | struct elf32_arm_relocs_copied *p; | |
5e681ec4 | 3905 | |
eb043451 | 3906 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
b7693d02 | 3907 | eh = (struct elf32_arm_link_hash_entry *) h; |
5e681ec4 | 3908 | |
eb043451 | 3909 | if (h->plt.refcount > 0) |
b7693d02 DJ |
3910 | { |
3911 | h->plt.refcount -= 1; | |
3912 | if (ELF32_R_TYPE (rel->r_info) == R_ARM_THM_PC22) | |
3913 | eh->plt_thumb_refcount--; | |
3914 | } | |
5e681ec4 | 3915 | |
eb043451 | 3916 | if (r_type == R_ARM_ABS32 |
eb043451 PB |
3917 | || r_type == R_ARM_REL32) |
3918 | { | |
eb043451 PB |
3919 | for (pp = &eh->relocs_copied; (p = *pp) != NULL; |
3920 | pp = &p->next) | |
3921 | if (p->section == sec) | |
3922 | { | |
3923 | p->count -= 1; | |
3924 | if (p->count == 0) | |
3925 | *pp = p->next; | |
3926 | break; | |
3927 | } | |
3928 | } | |
3929 | } | |
3930 | break; | |
5e681ec4 | 3931 | |
eb043451 PB |
3932 | default: |
3933 | break; | |
3934 | } | |
3935 | } | |
5e681ec4 | 3936 | |
b34976b6 | 3937 | return TRUE; |
252b5132 RH |
3938 | } |
3939 | ||
780a67af NC |
3940 | /* Look through the relocs for a section during the first phase. */ |
3941 | ||
b34976b6 | 3942 | static bfd_boolean |
57e8b36a NC |
3943 | elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info, |
3944 | asection *sec, const Elf_Internal_Rela *relocs) | |
252b5132 | 3945 | { |
b34976b6 AM |
3946 | Elf_Internal_Shdr *symtab_hdr; |
3947 | struct elf_link_hash_entry **sym_hashes; | |
3948 | struct elf_link_hash_entry **sym_hashes_end; | |
3949 | const Elf_Internal_Rela *rel; | |
3950 | const Elf_Internal_Rela *rel_end; | |
3951 | bfd *dynobj; | |
5e681ec4 | 3952 | asection *sreloc; |
b34976b6 | 3953 | bfd_vma *local_got_offsets; |
5e681ec4 | 3954 | struct elf32_arm_link_hash_table *htab; |
9a5aca8c | 3955 | |
1049f94e | 3956 | if (info->relocatable) |
b34976b6 | 3957 | return TRUE; |
9a5aca8c | 3958 | |
5e681ec4 PB |
3959 | htab = elf32_arm_hash_table (info); |
3960 | sreloc = NULL; | |
9a5aca8c | 3961 | |
252b5132 RH |
3962 | dynobj = elf_hash_table (info)->dynobj; |
3963 | local_got_offsets = elf_local_got_offsets (abfd); | |
f21f3fe0 | 3964 | |
252b5132 RH |
3965 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
3966 | sym_hashes = elf_sym_hashes (abfd); | |
9b485d32 NC |
3967 | sym_hashes_end = sym_hashes |
3968 | + symtab_hdr->sh_size / sizeof (Elf32_External_Sym); | |
3969 | ||
252b5132 RH |
3970 | if (!elf_bad_symtab (abfd)) |
3971 | sym_hashes_end -= symtab_hdr->sh_info; | |
9b485d32 | 3972 | |
252b5132 RH |
3973 | rel_end = relocs + sec->reloc_count; |
3974 | for (rel = relocs; rel < rel_end; rel++) | |
3975 | { | |
3976 | struct elf_link_hash_entry *h; | |
b7693d02 | 3977 | struct elf32_arm_link_hash_entry *eh; |
252b5132 | 3978 | unsigned long r_symndx; |
eb043451 | 3979 | int r_type; |
9a5aca8c | 3980 | |
252b5132 | 3981 | r_symndx = ELF32_R_SYM (rel->r_info); |
eb043451 PB |
3982 | r_type = ELF32_R_TYPE (rel->r_info); |
3983 | #ifndef OLD_ARM_ABI | |
3984 | r_type = arm_real_reloc_type (htab, r_type); | |
3985 | #endif | |
252b5132 RH |
3986 | if (r_symndx < symtab_hdr->sh_info) |
3987 | h = NULL; | |
3988 | else | |
3989 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
9a5aca8c | 3990 | |
b7693d02 DJ |
3991 | eh = (struct elf32_arm_link_hash_entry *) h; |
3992 | ||
eb043451 | 3993 | switch (r_type) |
252b5132 | 3994 | { |
5e681ec4 | 3995 | case R_ARM_GOT32: |
eb043451 PB |
3996 | #ifndef OLD_ARM_ABI |
3997 | case R_ARM_GOT_PREL: | |
3998 | #endif | |
5e681ec4 | 3999 | /* This symbol requires a global offset table entry. */ |
252b5132 RH |
4000 | if (h != NULL) |
4001 | { | |
5e681ec4 | 4002 | h->got.refcount++; |
252b5132 RH |
4003 | } |
4004 | else | |
4005 | { | |
5e681ec4 PB |
4006 | bfd_signed_vma *local_got_refcounts; |
4007 | ||
4008 | /* This is a global offset table entry for a local symbol. */ | |
4009 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
4010 | if (local_got_refcounts == NULL) | |
252b5132 | 4011 | { |
dc810e39 | 4012 | bfd_size_type size; |
252b5132 | 4013 | |
dc810e39 | 4014 | size = symtab_hdr->sh_info; |
57e8b36a NC |
4015 | size *= (sizeof (bfd_signed_vma) + sizeof (char)); |
4016 | local_got_refcounts = bfd_zalloc (abfd, size); | |
5e681ec4 | 4017 | if (local_got_refcounts == NULL) |
b34976b6 | 4018 | return FALSE; |
5e681ec4 | 4019 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
252b5132 | 4020 | } |
5e681ec4 | 4021 | local_got_refcounts[r_symndx] += 1; |
252b5132 | 4022 | } |
eb043451 PB |
4023 | if (r_type == R_ARM_GOT32) |
4024 | break; | |
4025 | /* Fall through. */ | |
252b5132 | 4026 | |
5e681ec4 PB |
4027 | case R_ARM_GOTOFF: |
4028 | case R_ARM_GOTPC: | |
4029 | if (htab->sgot == NULL) | |
4030 | { | |
4031 | if (htab->root.dynobj == NULL) | |
4032 | htab->root.dynobj = abfd; | |
4033 | if (!create_got_section (htab->root.dynobj, info)) | |
4034 | return FALSE; | |
4035 | } | |
252b5132 RH |
4036 | break; |
4037 | ||
4038 | case R_ARM_ABS32: | |
4039 | case R_ARM_REL32: | |
4040 | case R_ARM_PC24: | |
7359ea65 | 4041 | case R_ARM_PLT32: |
eb043451 | 4042 | #ifndef OLD_ARM_ABI |
5b5bb741 PB |
4043 | case R_ARM_CALL: |
4044 | case R_ARM_JUMP24: | |
eb043451 PB |
4045 | case R_ARM_PREL31: |
4046 | #endif | |
b7693d02 DJ |
4047 | case R_ARM_THM_PC22: |
4048 | /* Should the interworking branches be listed here? */ | |
7359ea65 | 4049 | if (h != NULL) |
5e681ec4 PB |
4050 | { |
4051 | /* If this reloc is in a read-only section, we might | |
4052 | need a copy reloc. We can't check reliably at this | |
4053 | stage whether the section is read-only, as input | |
4054 | sections have not yet been mapped to output sections. | |
4055 | Tentatively set the flag for now, and correct in | |
4056 | adjust_dynamic_symbol. */ | |
7359ea65 | 4057 | if (!info->shared) |
f5385ebf | 4058 | h->non_got_ref = 1; |
7359ea65 | 4059 | |
5e681ec4 | 4060 | /* We may need a .plt entry if the function this reloc |
c84cd8ee DJ |
4061 | refers to is in a different object. We can't tell for |
4062 | sure yet, because something later might force the | |
4063 | symbol local. */ | |
eb043451 | 4064 | if (r_type == R_ARM_PC24 |
5b5bb741 PB |
4065 | #ifndef OLD_ARM_ABI |
4066 | || r_type == R_ARM_CALL | |
4067 | || r_type == R_ARM_JUMP24 | |
ee06dc07 | 4068 | || r_type == R_ARM_PREL31 |
5b5bb741 | 4069 | #endif |
b7693d02 DJ |
4070 | || r_type == R_ARM_PLT32 |
4071 | || r_type == R_ARM_THM_PC22) | |
f5385ebf | 4072 | h->needs_plt = 1; |
4f199be3 DJ |
4073 | |
4074 | /* If we create a PLT entry, this relocation will reference | |
4075 | it, even if it's an ABS32 relocation. */ | |
4076 | h->plt.refcount += 1; | |
b7693d02 DJ |
4077 | |
4078 | if (r_type == R_ARM_THM_PC22) | |
4079 | eh->plt_thumb_refcount += 1; | |
5e681ec4 PB |
4080 | } |
4081 | ||
252b5132 RH |
4082 | /* If we are creating a shared library, and this is a reloc |
4083 | against a global symbol, or a non PC relative reloc | |
4084 | against a local symbol, then we need to copy the reloc | |
4085 | into the shared library. However, if we are linking with | |
4086 | -Bsymbolic, we do not need to copy a reloc against a | |
4087 | global symbol which is defined in an object we are | |
4088 | including in the link (i.e., DEF_REGULAR is set). At | |
4089 | this point we have not seen all the input files, so it is | |
4090 | possible that DEF_REGULAR is not set now but will be set | |
4091 | later (it is never cleared). We account for that | |
4092 | possibility below by storing information in the | |
5e681ec4 | 4093 | relocs_copied field of the hash table entry. */ |
252b5132 | 4094 | if (info->shared |
5e681ec4 | 4095 | && (sec->flags & SEC_ALLOC) != 0 |
eb043451 PB |
4096 | && ((r_type != R_ARM_PC24 |
4097 | && r_type != R_ARM_PLT32 | |
b6ee372a | 4098 | #ifndef OLD_ARM_ABI |
5b5bb741 PB |
4099 | && r_type != R_ARM_CALL |
4100 | && r_type != R_ARM_JUMP24 | |
eb043451 | 4101 | && r_type != R_ARM_PREL31 |
b6ee372a | 4102 | #endif |
b7693d02 DJ |
4103 | && r_type != R_ARM_REL32 |
4104 | && r_type != R_ARM_THM_PC22) | |
5e681ec4 PB |
4105 | || (h != NULL |
4106 | && (! info->symbolic | |
f5385ebf | 4107 | || !h->def_regular)))) |
252b5132 | 4108 | { |
5e681ec4 PB |
4109 | struct elf32_arm_relocs_copied *p, **head; |
4110 | ||
252b5132 RH |
4111 | /* When creating a shared object, we must copy these |
4112 | reloc types into the output file. We create a reloc | |
4113 | section in dynobj and make room for this reloc. */ | |
4114 | if (sreloc == NULL) | |
4115 | { | |
4116 | const char * name; | |
4117 | ||
4118 | name = (bfd_elf_string_from_elf_section | |
4119 | (abfd, | |
4120 | elf_elfheader (abfd)->e_shstrndx, | |
4121 | elf_section_data (sec)->rel_hdr.sh_name)); | |
4122 | if (name == NULL) | |
b34976b6 | 4123 | return FALSE; |
252b5132 RH |
4124 | |
4125 | BFD_ASSERT (strncmp (name, ".rel", 4) == 0 | |
99e4ae17 | 4126 | && strcmp (bfd_get_section_name (abfd, sec), |
252b5132 RH |
4127 | name + 4) == 0); |
4128 | ||
4129 | sreloc = bfd_get_section_by_name (dynobj, name); | |
4130 | if (sreloc == NULL) | |
4131 | { | |
4132 | flagword flags; | |
4133 | ||
4134 | sreloc = bfd_make_section (dynobj, name); | |
4135 | flags = (SEC_HAS_CONTENTS | SEC_READONLY | |
4136 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
e5a52504 MM |
4137 | if ((sec->flags & SEC_ALLOC) != 0 |
4138 | /* BPABI objects never have dynamic | |
4139 | relocations mapped. */ | |
4140 | && !htab->symbian_p) | |
252b5132 RH |
4141 | flags |= SEC_ALLOC | SEC_LOAD; |
4142 | if (sreloc == NULL | |
4143 | || ! bfd_set_section_flags (dynobj, sreloc, flags) | |
4144 | || ! bfd_set_section_alignment (dynobj, sreloc, 2)) | |
b34976b6 | 4145 | return FALSE; |
252b5132 | 4146 | } |
5e681ec4 PB |
4147 | |
4148 | elf_section_data (sec)->sreloc = sreloc; | |
252b5132 RH |
4149 | } |
4150 | ||
5e681ec4 PB |
4151 | /* If this is a global symbol, we count the number of |
4152 | relocations we need for this symbol. */ | |
4153 | if (h != NULL) | |
252b5132 | 4154 | { |
5e681ec4 PB |
4155 | head = &((struct elf32_arm_link_hash_entry *) h)->relocs_copied; |
4156 | } | |
4157 | else | |
4158 | { | |
4159 | /* Track dynamic relocs needed for local syms too. | |
4160 | We really need local syms available to do this | |
4161 | easily. Oh well. */ | |
57e8b36a | 4162 | |
5e681ec4 PB |
4163 | asection *s; |
4164 | s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, | |
4165 | sec, r_symndx); | |
4166 | if (s == NULL) | |
4167 | return FALSE; | |
57e8b36a | 4168 | |
5e681ec4 PB |
4169 | head = ((struct elf32_arm_relocs_copied **) |
4170 | &elf_section_data (s)->local_dynrel); | |
4171 | } | |
57e8b36a | 4172 | |
5e681ec4 PB |
4173 | p = *head; |
4174 | if (p == NULL || p->section != sec) | |
4175 | { | |
4176 | bfd_size_type amt = sizeof *p; | |
57e8b36a | 4177 | |
5e681ec4 | 4178 | p = bfd_alloc (htab->root.dynobj, amt); |
252b5132 | 4179 | if (p == NULL) |
5e681ec4 PB |
4180 | return FALSE; |
4181 | p->next = *head; | |
4182 | *head = p; | |
4183 | p->section = sec; | |
4184 | p->count = 0; | |
252b5132 | 4185 | } |
57e8b36a | 4186 | |
eb043451 | 4187 | if (r_type == R_ARM_ABS32 |
eb043451 | 4188 | || r_type == R_ARM_REL32) |
7359ea65 | 4189 | p->count += 1; |
252b5132 RH |
4190 | } |
4191 | break; | |
4192 | ||
4193 | /* This relocation describes the C++ object vtable hierarchy. | |
4194 | Reconstruct it for later use during GC. */ | |
4195 | case R_ARM_GNU_VTINHERIT: | |
c152c796 | 4196 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
b34976b6 | 4197 | return FALSE; |
252b5132 | 4198 | break; |
9a5aca8c | 4199 | |
252b5132 RH |
4200 | /* This relocation describes which C++ vtable entries are actually |
4201 | used. Record for later use during GC. */ | |
4202 | case R_ARM_GNU_VTENTRY: | |
c152c796 | 4203 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) |
b34976b6 | 4204 | return FALSE; |
252b5132 RH |
4205 | break; |
4206 | } | |
4207 | } | |
f21f3fe0 | 4208 | |
b34976b6 | 4209 | return TRUE; |
252b5132 RH |
4210 | } |
4211 | ||
b34976b6 | 4212 | static bfd_boolean |
0367ecfb | 4213 | is_arm_mapping_symbol_name (const char * name) |
252b5132 | 4214 | { |
0367ecfb NC |
4215 | return (name != NULL) |
4216 | && (name[0] == '$') | |
4217 | && ((name[1] == 'a') || (name[1] == 't') || (name[1] == 'd')) | |
4218 | && (name[2] == 0); | |
4219 | } | |
f21f3fe0 | 4220 | |
3c9458e9 NC |
4221 | /* Treat mapping symbols as special target symbols. */ |
4222 | ||
4223 | static bfd_boolean | |
4224 | elf32_arm_is_target_special_symbol (bfd * abfd ATTRIBUTE_UNUSED, asymbol * sym) | |
4225 | { | |
4226 | return is_arm_mapping_symbol_name (sym->name); | |
4227 | } | |
4228 | ||
0367ecfb NC |
4229 | /* This is a copy of elf_find_function() from elf.c except that |
4230 | ARM mapping symbols are ignored when looking for function names | |
4231 | and STT_ARM_TFUNC is considered to a function type. */ | |
252b5132 | 4232 | |
0367ecfb NC |
4233 | static bfd_boolean |
4234 | arm_elf_find_function (bfd * abfd ATTRIBUTE_UNUSED, | |
4235 | asection * section, | |
4236 | asymbol ** symbols, | |
4237 | bfd_vma offset, | |
4238 | const char ** filename_ptr, | |
4239 | const char ** functionname_ptr) | |
4240 | { | |
4241 | const char * filename = NULL; | |
4242 | asymbol * func = NULL; | |
4243 | bfd_vma low_func = 0; | |
4244 | asymbol ** p; | |
252b5132 RH |
4245 | |
4246 | for (p = symbols; *p != NULL; p++) | |
4247 | { | |
4248 | elf_symbol_type *q; | |
4249 | ||
4250 | q = (elf_symbol_type *) *p; | |
4251 | ||
252b5132 RH |
4252 | switch (ELF_ST_TYPE (q->internal_elf_sym.st_info)) |
4253 | { | |
4254 | default: | |
4255 | break; | |
4256 | case STT_FILE: | |
4257 | filename = bfd_asymbol_name (&q->symbol); | |
4258 | break; | |
252b5132 RH |
4259 | case STT_FUNC: |
4260 | case STT_ARM_TFUNC: | |
0367ecfb NC |
4261 | /* Skip $a and $t symbols. */ |
4262 | if ((q->symbol.flags & BSF_LOCAL) | |
4263 | && is_arm_mapping_symbol_name (q->symbol.name)) | |
4264 | continue; | |
4265 | /* Fall through. */ | |
4266 | case STT_NOTYPE: | |
6b40fcba | 4267 | if (bfd_get_section (&q->symbol) == section |
252b5132 RH |
4268 | && q->symbol.value >= low_func |
4269 | && q->symbol.value <= offset) | |
4270 | { | |
4271 | func = (asymbol *) q; | |
4272 | low_func = q->symbol.value; | |
4273 | } | |
4274 | break; | |
4275 | } | |
4276 | } | |
4277 | ||
4278 | if (func == NULL) | |
b34976b6 | 4279 | return FALSE; |
252b5132 | 4280 | |
0367ecfb NC |
4281 | if (filename_ptr) |
4282 | *filename_ptr = filename; | |
4283 | if (functionname_ptr) | |
4284 | *functionname_ptr = bfd_asymbol_name (func); | |
4285 | ||
4286 | return TRUE; | |
4287 | } | |
4288 | ||
4289 | ||
4290 | /* Find the nearest line to a particular section and offset, for error | |
4291 | reporting. This code is a duplicate of the code in elf.c, except | |
4292 | that it uses arm_elf_find_function. */ | |
4293 | ||
4294 | static bfd_boolean | |
4295 | elf32_arm_find_nearest_line (bfd * abfd, | |
4296 | asection * section, | |
4297 | asymbol ** symbols, | |
4298 | bfd_vma offset, | |
4299 | const char ** filename_ptr, | |
4300 | const char ** functionname_ptr, | |
4301 | unsigned int * line_ptr) | |
4302 | { | |
4303 | bfd_boolean found = FALSE; | |
4304 | ||
4305 | /* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */ | |
4306 | ||
4307 | if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset, | |
4308 | filename_ptr, functionname_ptr, | |
4309 | line_ptr, 0, | |
4310 | & elf_tdata (abfd)->dwarf2_find_line_info)) | |
4311 | { | |
4312 | if (!*functionname_ptr) | |
4313 | arm_elf_find_function (abfd, section, symbols, offset, | |
4314 | *filename_ptr ? NULL : filename_ptr, | |
4315 | functionname_ptr); | |
f21f3fe0 | 4316 | |
0367ecfb NC |
4317 | return TRUE; |
4318 | } | |
4319 | ||
4320 | if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset, | |
4321 | & found, filename_ptr, | |
4322 | functionname_ptr, line_ptr, | |
4323 | & elf_tdata (abfd)->line_info)) | |
4324 | return FALSE; | |
4325 | ||
4326 | if (found && (*functionname_ptr || *line_ptr)) | |
4327 | return TRUE; | |
4328 | ||
4329 | if (symbols == NULL) | |
4330 | return FALSE; | |
4331 | ||
4332 | if (! arm_elf_find_function (abfd, section, symbols, offset, | |
4333 | filename_ptr, functionname_ptr)) | |
4334 | return FALSE; | |
4335 | ||
4336 | *line_ptr = 0; | |
b34976b6 | 4337 | return TRUE; |
252b5132 RH |
4338 | } |
4339 | ||
4340 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
4341 | regular object. The current definition is in some section of the | |
4342 | dynamic object, but we're not including those sections. We have to | |
4343 | change the definition to something the rest of the link can | |
4344 | understand. */ | |
4345 | ||
b34976b6 | 4346 | static bfd_boolean |
57e8b36a NC |
4347 | elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info, |
4348 | struct elf_link_hash_entry * h) | |
252b5132 RH |
4349 | { |
4350 | bfd * dynobj; | |
4351 | asection * s; | |
4352 | unsigned int power_of_two; | |
b7693d02 | 4353 | struct elf32_arm_link_hash_entry * eh; |
252b5132 RH |
4354 | |
4355 | dynobj = elf_hash_table (info)->dynobj; | |
4356 | ||
4357 | /* Make sure we know what is going on here. */ | |
4358 | BFD_ASSERT (dynobj != NULL | |
f5385ebf | 4359 | && (h->needs_plt |
f6e332e6 | 4360 | || h->u.weakdef != NULL |
f5385ebf AM |
4361 | || (h->def_dynamic |
4362 | && h->ref_regular | |
4363 | && !h->def_regular))); | |
252b5132 | 4364 | |
b7693d02 DJ |
4365 | eh = (struct elf32_arm_link_hash_entry *) h; |
4366 | ||
252b5132 RH |
4367 | /* If this is a function, put it in the procedure linkage table. We |
4368 | will fill in the contents of the procedure linkage table later, | |
4369 | when we know the address of the .got section. */ | |
b7693d02 | 4370 | if (h->type == STT_FUNC || h->type == STT_ARM_TFUNC |
f5385ebf | 4371 | || h->needs_plt) |
252b5132 | 4372 | { |
5e681ec4 PB |
4373 | if (h->plt.refcount <= 0 |
4374 | || SYMBOL_CALLS_LOCAL (info, h) | |
4375 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
4376 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
4377 | { |
4378 | /* This case can occur if we saw a PLT32 reloc in an input | |
5e681ec4 PB |
4379 | file, but the symbol was never referred to by a dynamic |
4380 | object, or if all references were garbage collected. In | |
4381 | such a case, we don't actually need to build a procedure | |
4382 | linkage table, and we can just do a PC24 reloc instead. */ | |
4383 | h->plt.offset = (bfd_vma) -1; | |
b7693d02 | 4384 | eh->plt_thumb_refcount = 0; |
f5385ebf | 4385 | h->needs_plt = 0; |
252b5132 RH |
4386 | } |
4387 | ||
b34976b6 | 4388 | return TRUE; |
252b5132 | 4389 | } |
5e681ec4 | 4390 | else |
b7693d02 DJ |
4391 | { |
4392 | /* It's possible that we incorrectly decided a .plt reloc was | |
4393 | needed for an R_ARM_PC24 or similar reloc to a non-function sym | |
4394 | in check_relocs. We can't decide accurately between function | |
4395 | and non-function syms in check-relocs; Objects loaded later in | |
4396 | the link may change h->type. So fix it now. */ | |
4397 | h->plt.offset = (bfd_vma) -1; | |
4398 | eh->plt_thumb_refcount = 0; | |
4399 | } | |
252b5132 RH |
4400 | |
4401 | /* If this is a weak symbol, and there is a real definition, the | |
4402 | processor independent code will have arranged for us to see the | |
4403 | real definition first, and we can just use the same value. */ | |
f6e332e6 | 4404 | if (h->u.weakdef != NULL) |
252b5132 | 4405 | { |
f6e332e6 AM |
4406 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
4407 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
4408 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
4409 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
b34976b6 | 4410 | return TRUE; |
252b5132 RH |
4411 | } |
4412 | ||
4413 | /* This is a reference to a symbol defined by a dynamic object which | |
4414 | is not a function. */ | |
4415 | ||
4416 | /* If we are creating a shared library, we must presume that the | |
4417 | only references to the symbol are via the global offset table. | |
4418 | For such cases we need not do anything here; the relocations will | |
4419 | be handled correctly by relocate_section. */ | |
4420 | if (info->shared) | |
b34976b6 | 4421 | return TRUE; |
252b5132 RH |
4422 | |
4423 | /* We must allocate the symbol in our .dynbss section, which will | |
4424 | become part of the .bss section of the executable. There will be | |
4425 | an entry for this symbol in the .dynsym section. The dynamic | |
4426 | object will contain position independent code, so all references | |
4427 | from the dynamic object to this symbol will go through the global | |
4428 | offset table. The dynamic linker will use the .dynsym entry to | |
4429 | determine the address it must put in the global offset table, so | |
4430 | both the dynamic object and the regular object will refer to the | |
4431 | same memory location for the variable. */ | |
252b5132 RH |
4432 | s = bfd_get_section_by_name (dynobj, ".dynbss"); |
4433 | BFD_ASSERT (s != NULL); | |
4434 | ||
4435 | /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to | |
4436 | copy the initial value out of the dynamic object and into the | |
4437 | runtime process image. We need to remember the offset into the | |
4438 | .rel.bss section we are going to use. */ | |
4439 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
4440 | { | |
4441 | asection *srel; | |
4442 | ||
4443 | srel = bfd_get_section_by_name (dynobj, ".rel.bss"); | |
4444 | BFD_ASSERT (srel != NULL); | |
eea6121a | 4445 | srel->size += sizeof (Elf32_External_Rel); |
f5385ebf | 4446 | h->needs_copy = 1; |
252b5132 RH |
4447 | } |
4448 | ||
4449 | /* We need to figure out the alignment required for this symbol. I | |
4450 | have no idea how ELF linkers handle this. */ | |
4451 | power_of_two = bfd_log2 (h->size); | |
4452 | if (power_of_two > 3) | |
4453 | power_of_two = 3; | |
4454 | ||
4455 | /* Apply the required alignment. */ | |
eea6121a | 4456 | s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two)); |
252b5132 RH |
4457 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) |
4458 | { | |
4459 | if (! bfd_set_section_alignment (dynobj, s, power_of_two)) | |
b34976b6 | 4460 | return FALSE; |
252b5132 RH |
4461 | } |
4462 | ||
4463 | /* Define the symbol as being at this point in the section. */ | |
4464 | h->root.u.def.section = s; | |
eea6121a | 4465 | h->root.u.def.value = s->size; |
252b5132 RH |
4466 | |
4467 | /* Increment the section size to make room for the symbol. */ | |
eea6121a | 4468 | s->size += h->size; |
252b5132 | 4469 | |
b34976b6 | 4470 | return TRUE; |
252b5132 RH |
4471 | } |
4472 | ||
5e681ec4 PB |
4473 | /* Allocate space in .plt, .got and associated reloc sections for |
4474 | dynamic relocs. */ | |
4475 | ||
4476 | static bfd_boolean | |
57e8b36a | 4477 | allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
5e681ec4 PB |
4478 | { |
4479 | struct bfd_link_info *info; | |
4480 | struct elf32_arm_link_hash_table *htab; | |
4481 | struct elf32_arm_link_hash_entry *eh; | |
4482 | struct elf32_arm_relocs_copied *p; | |
4483 | ||
b7693d02 DJ |
4484 | eh = (struct elf32_arm_link_hash_entry *) h; |
4485 | ||
5e681ec4 PB |
4486 | if (h->root.type == bfd_link_hash_indirect) |
4487 | return TRUE; | |
4488 | ||
4489 | if (h->root.type == bfd_link_hash_warning) | |
4490 | /* When warning symbols are created, they **replace** the "real" | |
4491 | entry in the hash table, thus we never get to see the real | |
4492 | symbol in a hash traversal. So look at it now. */ | |
4493 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4494 | ||
4495 | info = (struct bfd_link_info *) inf; | |
4496 | htab = elf32_arm_hash_table (info); | |
4497 | ||
4498 | if (htab->root.dynamic_sections_created | |
4499 | && h->plt.refcount > 0) | |
4500 | { | |
4501 | /* Make sure this symbol is output as a dynamic symbol. | |
4502 | Undefined weak syms won't yet be marked as dynamic. */ | |
4503 | if (h->dynindx == -1 | |
f5385ebf | 4504 | && !h->forced_local) |
5e681ec4 | 4505 | { |
c152c796 | 4506 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
5e681ec4 PB |
4507 | return FALSE; |
4508 | } | |
4509 | ||
4510 | if (info->shared | |
7359ea65 | 4511 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
5e681ec4 PB |
4512 | { |
4513 | asection *s = htab->splt; | |
4514 | ||
4515 | /* If this is the first .plt entry, make room for the special | |
4516 | first entry. */ | |
eea6121a | 4517 | if (s->size == 0) |
e5a52504 | 4518 | s->size += htab->plt_header_size; |
5e681ec4 | 4519 | |
eea6121a | 4520 | h->plt.offset = s->size; |
5e681ec4 | 4521 | |
b7693d02 DJ |
4522 | /* If we will insert a Thumb trampoline before this PLT, leave room |
4523 | for it. */ | |
4524 | if (!htab->symbian_p && eh->plt_thumb_refcount > 0) | |
4525 | { | |
4526 | h->plt.offset += PLT_THUMB_STUB_SIZE; | |
4527 | s->size += PLT_THUMB_STUB_SIZE; | |
4528 | } | |
4529 | ||
5e681ec4 PB |
4530 | /* If this symbol is not defined in a regular file, and we are |
4531 | not generating a shared library, then set the symbol to this | |
4532 | location in the .plt. This is required to make function | |
4533 | pointers compare as equal between the normal executable and | |
4534 | the shared library. */ | |
4535 | if (! info->shared | |
f5385ebf | 4536 | && !h->def_regular) |
5e681ec4 PB |
4537 | { |
4538 | h->root.u.def.section = s; | |
4539 | h->root.u.def.value = h->plt.offset; | |
b7693d02 DJ |
4540 | |
4541 | /* Make sure the function is not marked as Thumb, in case | |
4542 | it is the target of an ABS32 relocation, which will | |
4543 | point to the PLT entry. */ | |
4544 | if (ELF_ST_TYPE (h->type) == STT_ARM_TFUNC) | |
4545 | h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC); | |
5e681ec4 PB |
4546 | } |
4547 | ||
4548 | /* Make room for this entry. */ | |
e5a52504 | 4549 | s->size += htab->plt_entry_size; |
5e681ec4 | 4550 | |
e5a52504 | 4551 | if (!htab->symbian_p) |
b7693d02 DJ |
4552 | { |
4553 | /* We also need to make an entry in the .got.plt section, which | |
4554 | will be placed in the .got section by the linker script. */ | |
4555 | eh->plt_got_offset = htab->sgotplt->size; | |
4556 | htab->sgotplt->size += 4; | |
4557 | } | |
5e681ec4 PB |
4558 | |
4559 | /* We also need to make an entry in the .rel.plt section. */ | |
eea6121a | 4560 | htab->srelplt->size += sizeof (Elf32_External_Rel); |
5e681ec4 PB |
4561 | } |
4562 | else | |
4563 | { | |
4564 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 4565 | h->needs_plt = 0; |
5e681ec4 PB |
4566 | } |
4567 | } | |
4568 | else | |
4569 | { | |
4570 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 4571 | h->needs_plt = 0; |
5e681ec4 PB |
4572 | } |
4573 | ||
4574 | if (h->got.refcount > 0) | |
4575 | { | |
4576 | asection *s; | |
4577 | bfd_boolean dyn; | |
4578 | ||
4579 | /* Make sure this symbol is output as a dynamic symbol. | |
4580 | Undefined weak syms won't yet be marked as dynamic. */ | |
4581 | if (h->dynindx == -1 | |
f5385ebf | 4582 | && !h->forced_local) |
5e681ec4 | 4583 | { |
c152c796 | 4584 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
5e681ec4 PB |
4585 | return FALSE; |
4586 | } | |
4587 | ||
e5a52504 MM |
4588 | if (!htab->symbian_p) |
4589 | { | |
4590 | s = htab->sgot; | |
4591 | h->got.offset = s->size; | |
4592 | s->size += 4; | |
4593 | dyn = htab->root.dynamic_sections_created; | |
4594 | if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
4595 | || h->root.type != bfd_link_hash_undefweak) | |
4596 | && (info->shared | |
4597 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
4598 | htab->srelgot->size += sizeof (Elf32_External_Rel); | |
4599 | } | |
5e681ec4 PB |
4600 | } |
4601 | else | |
4602 | h->got.offset = (bfd_vma) -1; | |
4603 | ||
5e681ec4 PB |
4604 | if (eh->relocs_copied == NULL) |
4605 | return TRUE; | |
4606 | ||
4607 | /* In the shared -Bsymbolic case, discard space allocated for | |
4608 | dynamic pc-relative relocs against symbols which turn out to be | |
4609 | defined in regular objects. For the normal shared case, discard | |
4610 | space for pc-relative relocs that have become local due to symbol | |
4611 | visibility changes. */ | |
4612 | ||
4613 | if (info->shared) | |
4614 | { | |
7359ea65 DJ |
4615 | /* Discard relocs on undefined weak syms with non-default |
4616 | visibility. */ | |
5e681ec4 PB |
4617 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
4618 | && h->root.type == bfd_link_hash_undefweak) | |
4619 | eh->relocs_copied = NULL; | |
4620 | } | |
4621 | else | |
4622 | { | |
4623 | /* For the non-shared case, discard space for relocs against | |
4624 | symbols which turn out to need copy relocs or are not | |
4625 | dynamic. */ | |
4626 | ||
f5385ebf AM |
4627 | if (!h->non_got_ref |
4628 | && ((h->def_dynamic | |
4629 | && !h->def_regular) | |
5e681ec4 PB |
4630 | || (htab->root.dynamic_sections_created |
4631 | && (h->root.type == bfd_link_hash_undefweak | |
4632 | || h->root.type == bfd_link_hash_undefined)))) | |
4633 | { | |
4634 | /* Make sure this symbol is output as a dynamic symbol. | |
4635 | Undefined weak syms won't yet be marked as dynamic. */ | |
4636 | if (h->dynindx == -1 | |
f5385ebf | 4637 | && !h->forced_local) |
5e681ec4 | 4638 | { |
c152c796 | 4639 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
5e681ec4 PB |
4640 | return FALSE; |
4641 | } | |
4642 | ||
4643 | /* If that succeeded, we know we'll be keeping all the | |
4644 | relocs. */ | |
4645 | if (h->dynindx != -1) | |
4646 | goto keep; | |
4647 | } | |
4648 | ||
4649 | eh->relocs_copied = NULL; | |
4650 | ||
4651 | keep: ; | |
4652 | } | |
4653 | ||
4654 | /* Finally, allocate space. */ | |
4655 | for (p = eh->relocs_copied; p != NULL; p = p->next) | |
4656 | { | |
4657 | asection *sreloc = elf_section_data (p->section)->sreloc; | |
eea6121a | 4658 | sreloc->size += p->count * sizeof (Elf32_External_Rel); |
5e681ec4 PB |
4659 | } |
4660 | ||
4661 | return TRUE; | |
4662 | } | |
4663 | ||
08d1f311 DJ |
4664 | /* Find any dynamic relocs that apply to read-only sections. */ |
4665 | ||
4666 | static bfd_boolean | |
4667 | elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry *h, PTR inf) | |
4668 | { | |
4669 | struct elf32_arm_link_hash_entry *eh; | |
4670 | struct elf32_arm_relocs_copied *p; | |
4671 | ||
4672 | if (h->root.type == bfd_link_hash_warning) | |
4673 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4674 | ||
4675 | eh = (struct elf32_arm_link_hash_entry *) h; | |
4676 | for (p = eh->relocs_copied; p != NULL; p = p->next) | |
4677 | { | |
4678 | asection *s = p->section; | |
4679 | ||
4680 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
4681 | { | |
4682 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
4683 | ||
4684 | info->flags |= DF_TEXTREL; | |
4685 | ||
4686 | /* Not an error, just cut short the traversal. */ | |
4687 | return FALSE; | |
4688 | } | |
4689 | } | |
4690 | return TRUE; | |
4691 | } | |
4692 | ||
252b5132 RH |
4693 | /* Set the sizes of the dynamic sections. */ |
4694 | ||
b34976b6 | 4695 | static bfd_boolean |
57e8b36a NC |
4696 | elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED, |
4697 | struct bfd_link_info * info) | |
252b5132 RH |
4698 | { |
4699 | bfd * dynobj; | |
4700 | asection * s; | |
b34976b6 AM |
4701 | bfd_boolean plt; |
4702 | bfd_boolean relocs; | |
5e681ec4 PB |
4703 | bfd *ibfd; |
4704 | struct elf32_arm_link_hash_table *htab; | |
252b5132 | 4705 | |
5e681ec4 | 4706 | htab = elf32_arm_hash_table (info); |
252b5132 RH |
4707 | dynobj = elf_hash_table (info)->dynobj; |
4708 | BFD_ASSERT (dynobj != NULL); | |
4709 | ||
4710 | if (elf_hash_table (info)->dynamic_sections_created) | |
4711 | { | |
4712 | /* Set the contents of the .interp section to the interpreter. */ | |
893c4fe2 | 4713 | if (info->executable) |
252b5132 RH |
4714 | { |
4715 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
4716 | BFD_ASSERT (s != NULL); | |
eea6121a | 4717 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
252b5132 RH |
4718 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
4719 | } | |
4720 | } | |
5e681ec4 PB |
4721 | |
4722 | /* Set up .got offsets for local syms, and space for local dynamic | |
4723 | relocs. */ | |
4724 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
252b5132 | 4725 | { |
5e681ec4 PB |
4726 | bfd_signed_vma *local_got; |
4727 | bfd_signed_vma *end_local_got; | |
4728 | char *local_tls_type; | |
4729 | bfd_size_type locsymcount; | |
4730 | Elf_Internal_Shdr *symtab_hdr; | |
4731 | asection *srel; | |
4732 | ||
4733 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) | |
4734 | continue; | |
4735 | ||
4736 | for (s = ibfd->sections; s != NULL; s = s->next) | |
4737 | { | |
4738 | struct elf32_arm_relocs_copied *p; | |
4739 | ||
4740 | for (p = *((struct elf32_arm_relocs_copied **) | |
4741 | &elf_section_data (s)->local_dynrel); | |
4742 | p != NULL; | |
4743 | p = p->next) | |
4744 | { | |
4745 | if (!bfd_is_abs_section (p->section) | |
4746 | && bfd_is_abs_section (p->section->output_section)) | |
4747 | { | |
4748 | /* Input section has been discarded, either because | |
4749 | it is a copy of a linkonce section or due to | |
4750 | linker script /DISCARD/, so we'll be discarding | |
4751 | the relocs too. */ | |
4752 | } | |
4753 | else if (p->count != 0) | |
4754 | { | |
4755 | srel = elf_section_data (p->section)->sreloc; | |
eea6121a | 4756 | srel->size += p->count * sizeof (Elf32_External_Rel); |
5e681ec4 PB |
4757 | if ((p->section->output_section->flags & SEC_READONLY) != 0) |
4758 | info->flags |= DF_TEXTREL; | |
4759 | } | |
4760 | } | |
4761 | } | |
4762 | ||
4763 | local_got = elf_local_got_refcounts (ibfd); | |
4764 | if (!local_got) | |
4765 | continue; | |
4766 | ||
4767 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
4768 | locsymcount = symtab_hdr->sh_info; | |
4769 | end_local_got = local_got + locsymcount; | |
4770 | s = htab->sgot; | |
4771 | srel = htab->srelgot; | |
4772 | for (; local_got < end_local_got; ++local_got, ++local_tls_type) | |
4773 | { | |
4774 | if (*local_got > 0) | |
4775 | { | |
eea6121a AM |
4776 | *local_got = s->size; |
4777 | s->size += 4; | |
5e681ec4 | 4778 | if (info->shared) |
eea6121a | 4779 | srel->size += sizeof (Elf32_External_Rel); |
5e681ec4 PB |
4780 | } |
4781 | else | |
4782 | *local_got = (bfd_vma) -1; | |
4783 | } | |
252b5132 RH |
4784 | } |
4785 | ||
5e681ec4 PB |
4786 | /* Allocate global sym .plt and .got entries, and space for global |
4787 | sym dynamic relocs. */ | |
57e8b36a | 4788 | elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info); |
252b5132 RH |
4789 | |
4790 | /* The check_relocs and adjust_dynamic_symbol entry points have | |
4791 | determined the sizes of the various dynamic sections. Allocate | |
4792 | memory for them. */ | |
b34976b6 AM |
4793 | plt = FALSE; |
4794 | relocs = FALSE; | |
252b5132 RH |
4795 | for (s = dynobj->sections; s != NULL; s = s->next) |
4796 | { | |
4797 | const char * name; | |
b34976b6 | 4798 | bfd_boolean strip; |
252b5132 RH |
4799 | |
4800 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
4801 | continue; | |
4802 | ||
4803 | /* It's OK to base decisions on the section name, because none | |
4804 | of the dynobj section names depend upon the input files. */ | |
4805 | name = bfd_get_section_name (dynobj, s); | |
4806 | ||
b34976b6 | 4807 | strip = FALSE; |
252b5132 | 4808 | |
24a1ba0f | 4809 | if (strcmp (name, ".plt") == 0) |
252b5132 | 4810 | { |
eea6121a | 4811 | if (s->size == 0) |
252b5132 RH |
4812 | { |
4813 | /* Strip this section if we don't need it; see the | |
4814 | comment below. */ | |
b34976b6 | 4815 | strip = TRUE; |
252b5132 RH |
4816 | } |
4817 | else | |
4818 | { | |
4819 | /* Remember whether there is a PLT. */ | |
b34976b6 | 4820 | plt = TRUE; |
252b5132 RH |
4821 | } |
4822 | } | |
4823 | else if (strncmp (name, ".rel", 4) == 0) | |
4824 | { | |
eea6121a | 4825 | if (s->size == 0) |
252b5132 RH |
4826 | { |
4827 | /* If we don't need this section, strip it from the | |
4828 | output file. This is mostly to handle .rel.bss and | |
4829 | .rel.plt. We must create both sections in | |
4830 | create_dynamic_sections, because they must be created | |
4831 | before the linker maps input sections to output | |
4832 | sections. The linker does that before | |
4833 | adjust_dynamic_symbol is called, and it is that | |
4834 | function which decides whether anything needs to go | |
4835 | into these sections. */ | |
b34976b6 | 4836 | strip = TRUE; |
252b5132 RH |
4837 | } |
4838 | else | |
4839 | { | |
252b5132 RH |
4840 | /* Remember whether there are any reloc sections other |
4841 | than .rel.plt. */ | |
4842 | if (strcmp (name, ".rel.plt") != 0) | |
b34976b6 | 4843 | relocs = TRUE; |
252b5132 RH |
4844 | |
4845 | /* We use the reloc_count field as a counter if we need | |
4846 | to copy relocs into the output file. */ | |
4847 | s->reloc_count = 0; | |
4848 | } | |
4849 | } | |
4850 | else if (strncmp (name, ".got", 4) != 0) | |
4851 | { | |
4852 | /* It's not one of our sections, so don't allocate space. */ | |
4853 | continue; | |
4854 | } | |
4855 | ||
4856 | if (strip) | |
4857 | { | |
52585bb8 | 4858 | _bfd_strip_section_from_output (info, s); |
252b5132 RH |
4859 | continue; |
4860 | } | |
4861 | ||
4862 | /* Allocate memory for the section contents. */ | |
eea6121a AM |
4863 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
4864 | if (s->contents == NULL && s->size != 0) | |
b34976b6 | 4865 | return FALSE; |
252b5132 RH |
4866 | } |
4867 | ||
4868 | if (elf_hash_table (info)->dynamic_sections_created) | |
4869 | { | |
4870 | /* Add some entries to the .dynamic section. We fill in the | |
4871 | values later, in elf32_arm_finish_dynamic_sections, but we | |
4872 | must add the entries now so that we get the correct size for | |
4873 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
4874 | dynamic linker and used by the debugger. */ | |
dc810e39 | 4875 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 4876 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 AM |
4877 | |
4878 | if (!info->shared) | |
252b5132 | 4879 | { |
dc810e39 | 4880 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 4881 | return FALSE; |
252b5132 RH |
4882 | } |
4883 | ||
4884 | if (plt) | |
4885 | { | |
dc810e39 AM |
4886 | if ( !add_dynamic_entry (DT_PLTGOT, 0) |
4887 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
4888 | || !add_dynamic_entry (DT_PLTREL, DT_REL) | |
4889 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 4890 | return FALSE; |
252b5132 RH |
4891 | } |
4892 | ||
4893 | if (relocs) | |
4894 | { | |
dc810e39 AM |
4895 | if ( !add_dynamic_entry (DT_REL, 0) |
4896 | || !add_dynamic_entry (DT_RELSZ, 0) | |
4897 | || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel))) | |
b34976b6 | 4898 | return FALSE; |
252b5132 RH |
4899 | } |
4900 | ||
08d1f311 DJ |
4901 | /* If any dynamic relocs apply to a read-only section, |
4902 | then we need a DT_TEXTREL entry. */ | |
4903 | if ((info->flags & DF_TEXTREL) == 0) | |
4904 | elf_link_hash_traverse (&htab->root, elf32_arm_readonly_dynrelocs, | |
4905 | (PTR) info); | |
4906 | ||
99e4ae17 | 4907 | if ((info->flags & DF_TEXTREL) != 0) |
252b5132 | 4908 | { |
dc810e39 | 4909 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
b34976b6 | 4910 | return FALSE; |
d6cf2879 | 4911 | info->flags |= DF_TEXTREL; |
252b5132 RH |
4912 | } |
4913 | } | |
dc810e39 | 4914 | #undef add_synamic_entry |
252b5132 | 4915 | |
b34976b6 | 4916 | return TRUE; |
252b5132 RH |
4917 | } |
4918 | ||
252b5132 RH |
4919 | /* Finish up dynamic symbol handling. We set the contents of various |
4920 | dynamic sections here. */ | |
4921 | ||
b34976b6 | 4922 | static bfd_boolean |
57e8b36a NC |
4923 | elf32_arm_finish_dynamic_symbol (bfd * output_bfd, struct bfd_link_info * info, |
4924 | struct elf_link_hash_entry * h, Elf_Internal_Sym * sym) | |
252b5132 RH |
4925 | { |
4926 | bfd * dynobj; | |
e5a52504 | 4927 | struct elf32_arm_link_hash_table *htab; |
b7693d02 | 4928 | struct elf32_arm_link_hash_entry *eh; |
252b5132 RH |
4929 | |
4930 | dynobj = elf_hash_table (info)->dynobj; | |
e5a52504 | 4931 | htab = elf32_arm_hash_table (info); |
b7693d02 | 4932 | eh = (struct elf32_arm_link_hash_entry *) h; |
252b5132 RH |
4933 | |
4934 | if (h->plt.offset != (bfd_vma) -1) | |
4935 | { | |
4936 | asection * splt; | |
252b5132 | 4937 | asection * srel; |
e5a52504 | 4938 | bfd_byte *loc; |
24a1ba0f | 4939 | bfd_vma plt_index; |
947216bf | 4940 | Elf_Internal_Rela rel; |
252b5132 RH |
4941 | |
4942 | /* This symbol has an entry in the procedure linkage table. Set | |
4943 | it up. */ | |
4944 | ||
4945 | BFD_ASSERT (h->dynindx != -1); | |
4946 | ||
4947 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
252b5132 | 4948 | srel = bfd_get_section_by_name (dynobj, ".rel.plt"); |
e5a52504 | 4949 | BFD_ASSERT (splt != NULL && srel != NULL); |
252b5132 | 4950 | |
e5a52504 MM |
4951 | /* Fill in the entry in the procedure linkage table. */ |
4952 | if (htab->symbian_p) | |
4953 | { | |
4954 | unsigned i; | |
4955 | for (i = 0; i < htab->plt_entry_size / 4; ++i) | |
4956 | bfd_put_32 (output_bfd, | |
4957 | elf32_arm_symbian_plt_entry[i], | |
4958 | splt->contents + h->plt.offset + 4 * i); | |
4959 | ||
4960 | /* Fill in the entry in the .rel.plt section. */ | |
2a1b9a48 MM |
4961 | rel.r_offset = (splt->output_section->vma |
4962 | + splt->output_offset | |
e5a52504 MM |
4963 | + h->plt.offset + 4 * (i - 1)); |
4964 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT); | |
b7693d02 DJ |
4965 | |
4966 | /* Get the index in the procedure linkage table which | |
4967 | corresponds to this symbol. This is the index of this symbol | |
4968 | in all the symbols for which we are making plt entries. The | |
4969 | first entry in the procedure linkage table is reserved. */ | |
4970 | plt_index = ((h->plt.offset - htab->plt_header_size) | |
4971 | / htab->plt_entry_size); | |
e5a52504 MM |
4972 | } |
4973 | else | |
4974 | { | |
4975 | bfd_vma got_offset; | |
4976 | bfd_vma got_displacement; | |
4977 | asection * sgot; | |
4978 | ||
4979 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
4980 | BFD_ASSERT (sgot != NULL); | |
4981 | ||
b7693d02 DJ |
4982 | /* Get the offset into the .got.plt table of the entry that |
4983 | corresponds to this function. */ | |
4984 | got_offset = eh->plt_got_offset; | |
4985 | ||
4986 | /* Get the index in the procedure linkage table which | |
4987 | corresponds to this symbol. This is the index of this symbol | |
4988 | in all the symbols for which we are making plt entries. The | |
4989 | first three entries in .got.plt are reserved; after that | |
4990 | symbols appear in the same order as in .plt. */ | |
4991 | plt_index = (got_offset - 12) / 4; | |
e5a52504 MM |
4992 | |
4993 | /* Calculate the displacement between the PLT slot and the | |
b7693d02 DJ |
4994 | entry in the GOT. The eight-byte offset accounts for the |
4995 | value produced by adding to pc in the first instruction | |
4996 | of the PLT stub. */ | |
e5a52504 MM |
4997 | got_displacement = (sgot->output_section->vma |
4998 | + sgot->output_offset | |
4999 | + got_offset | |
5000 | - splt->output_section->vma | |
5001 | - splt->output_offset | |
5002 | - h->plt.offset | |
5003 | - 8); | |
5e681ec4 | 5004 | |
e5a52504 | 5005 | BFD_ASSERT ((got_displacement & 0xf0000000) == 0); |
5e681ec4 | 5006 | |
b7693d02 DJ |
5007 | if (eh->plt_thumb_refcount > 0) |
5008 | { | |
5009 | bfd_put_16 (output_bfd, elf32_arm_plt_thumb_stub[0], | |
5010 | splt->contents + h->plt.offset - 4); | |
5011 | bfd_put_16 (output_bfd, elf32_arm_plt_thumb_stub[1], | |
5012 | splt->contents + h->plt.offset - 2); | |
5013 | } | |
5014 | ||
e5a52504 MM |
5015 | bfd_put_32 (output_bfd, elf32_arm_plt_entry[0] | ((got_displacement & 0x0ff00000) >> 20), |
5016 | splt->contents + h->plt.offset + 0); | |
5017 | bfd_put_32 (output_bfd, elf32_arm_plt_entry[1] | ((got_displacement & 0x000ff000) >> 12), | |
5018 | splt->contents + h->plt.offset + 4); | |
5019 | bfd_put_32 (output_bfd, elf32_arm_plt_entry[2] | (got_displacement & 0x00000fff), | |
5020 | splt->contents + h->plt.offset + 8); | |
5e681ec4 | 5021 | #ifdef FOUR_WORD_PLT |
e5a52504 MM |
5022 | bfd_put_32 (output_bfd, elf32_arm_plt_entry[3], |
5023 | splt->contents + h->plt.offset + 12); | |
5e681ec4 | 5024 | #endif |
252b5132 | 5025 | |
e5a52504 MM |
5026 | /* Fill in the entry in the global offset table. */ |
5027 | bfd_put_32 (output_bfd, | |
5028 | (splt->output_section->vma | |
5029 | + splt->output_offset), | |
5030 | sgot->contents + got_offset); | |
5031 | ||
5032 | /* Fill in the entry in the .rel.plt section. */ | |
5033 | rel.r_offset = (sgot->output_section->vma | |
5034 | + sgot->output_offset | |
5035 | + got_offset); | |
5036 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT); | |
5037 | } | |
57e8b36a | 5038 | |
947216bf AM |
5039 | loc = srel->contents + plt_index * sizeof (Elf32_External_Rel); |
5040 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); | |
252b5132 | 5041 | |
f5385ebf | 5042 | if (!h->def_regular) |
252b5132 RH |
5043 | { |
5044 | /* Mark the symbol as undefined, rather than as defined in | |
5045 | the .plt section. Leave the value alone. */ | |
5046 | sym->st_shndx = SHN_UNDEF; | |
d982ba73 PB |
5047 | /* If the symbol is weak, we do need to clear the value. |
5048 | Otherwise, the PLT entry would provide a definition for | |
5049 | the symbol even if the symbol wasn't defined anywhere, | |
5050 | and so the symbol would never be NULL. */ | |
f5385ebf | 5051 | if (!h->ref_regular_nonweak) |
d982ba73 | 5052 | sym->st_value = 0; |
252b5132 RH |
5053 | } |
5054 | } | |
5055 | ||
5056 | if (h->got.offset != (bfd_vma) -1) | |
5057 | { | |
5058 | asection * sgot; | |
5059 | asection * srel; | |
947216bf AM |
5060 | Elf_Internal_Rela rel; |
5061 | bfd_byte *loc; | |
252b5132 RH |
5062 | |
5063 | /* This symbol has an entry in the global offset table. Set it | |
5064 | up. */ | |
252b5132 RH |
5065 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
5066 | srel = bfd_get_section_by_name (dynobj, ".rel.got"); | |
5067 | BFD_ASSERT (sgot != NULL && srel != NULL); | |
5068 | ||
5069 | rel.r_offset = (sgot->output_section->vma | |
5070 | + sgot->output_offset | |
dc810e39 | 5071 | + (h->got.offset &~ (bfd_vma) 1)); |
252b5132 | 5072 | |
5e681ec4 PB |
5073 | /* If this is a static link, or it is a -Bsymbolic link and the |
5074 | symbol is defined locally or was forced to be local because | |
5075 | of a version file, we just want to emit a RELATIVE reloc. | |
5076 | The entry in the global offset table will already have been | |
5077 | initialized in the relocate_section function. */ | |
252b5132 | 5078 | if (info->shared |
5e681ec4 PB |
5079 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
5080 | { | |
5081 | BFD_ASSERT((h->got.offset & 1) != 0); | |
5082 | rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE); | |
5083 | } | |
252b5132 RH |
5084 | else |
5085 | { | |
5e681ec4 | 5086 | BFD_ASSERT((h->got.offset & 1) == 0); |
252b5132 RH |
5087 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); |
5088 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT); | |
5089 | } | |
5090 | ||
947216bf AM |
5091 | loc = srel->contents + srel->reloc_count++ * sizeof (Elf32_External_Rel); |
5092 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); | |
252b5132 RH |
5093 | } |
5094 | ||
f5385ebf | 5095 | if (h->needs_copy) |
252b5132 RH |
5096 | { |
5097 | asection * s; | |
947216bf AM |
5098 | Elf_Internal_Rela rel; |
5099 | bfd_byte *loc; | |
252b5132 RH |
5100 | |
5101 | /* This symbol needs a copy reloc. Set it up. */ | |
252b5132 RH |
5102 | BFD_ASSERT (h->dynindx != -1 |
5103 | && (h->root.type == bfd_link_hash_defined | |
5104 | || h->root.type == bfd_link_hash_defweak)); | |
5105 | ||
5106 | s = bfd_get_section_by_name (h->root.u.def.section->owner, | |
5107 | ".rel.bss"); | |
5108 | BFD_ASSERT (s != NULL); | |
5109 | ||
5110 | rel.r_offset = (h->root.u.def.value | |
5111 | + h->root.u.def.section->output_section->vma | |
5112 | + h->root.u.def.section->output_offset); | |
5113 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY); | |
947216bf AM |
5114 | loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rel); |
5115 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); | |
252b5132 RH |
5116 | } |
5117 | ||
5118 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
5119 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
5120 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
5121 | sym->st_shndx = SHN_ABS; | |
5122 | ||
b34976b6 | 5123 | return TRUE; |
252b5132 RH |
5124 | } |
5125 | ||
5126 | /* Finish up the dynamic sections. */ | |
5127 | ||
b34976b6 | 5128 | static bfd_boolean |
57e8b36a | 5129 | elf32_arm_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info * info) |
252b5132 RH |
5130 | { |
5131 | bfd * dynobj; | |
5132 | asection * sgot; | |
5133 | asection * sdyn; | |
5134 | ||
5135 | dynobj = elf_hash_table (info)->dynobj; | |
5136 | ||
5137 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
229fcec5 | 5138 | BFD_ASSERT (elf32_arm_hash_table (info)->symbian_p || sgot != NULL); |
252b5132 RH |
5139 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
5140 | ||
5141 | if (elf_hash_table (info)->dynamic_sections_created) | |
5142 | { | |
5143 | asection *splt; | |
5144 | Elf32_External_Dyn *dyncon, *dynconend; | |
229fcec5 | 5145 | struct elf32_arm_link_hash_table *htab; |
252b5132 | 5146 | |
229fcec5 | 5147 | htab = elf32_arm_hash_table (info); |
252b5132 | 5148 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
24a1ba0f | 5149 | BFD_ASSERT (splt != NULL && sdyn != NULL); |
252b5132 RH |
5150 | |
5151 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
eea6121a | 5152 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
9b485d32 | 5153 | |
252b5132 RH |
5154 | for (; dyncon < dynconend; dyncon++) |
5155 | { | |
5156 | Elf_Internal_Dyn dyn; | |
5157 | const char * name; | |
5158 | asection * s; | |
5159 | ||
5160 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
5161 | ||
5162 | switch (dyn.d_tag) | |
5163 | { | |
229fcec5 MM |
5164 | unsigned int type; |
5165 | ||
252b5132 RH |
5166 | default: |
5167 | break; | |
5168 | ||
229fcec5 MM |
5169 | case DT_HASH: |
5170 | name = ".hash"; | |
5171 | goto get_vma_if_bpabi; | |
5172 | case DT_STRTAB: | |
5173 | name = ".dynstr"; | |
5174 | goto get_vma_if_bpabi; | |
5175 | case DT_SYMTAB: | |
5176 | name = ".dynsym"; | |
5177 | goto get_vma_if_bpabi; | |
c0042f5d MM |
5178 | case DT_VERSYM: |
5179 | name = ".gnu.version"; | |
5180 | goto get_vma_if_bpabi; | |
5181 | case DT_VERDEF: | |
5182 | name = ".gnu.version_d"; | |
5183 | goto get_vma_if_bpabi; | |
5184 | case DT_VERNEED: | |
5185 | name = ".gnu.version_r"; | |
5186 | goto get_vma_if_bpabi; | |
5187 | ||
252b5132 RH |
5188 | case DT_PLTGOT: |
5189 | name = ".got"; | |
5190 | goto get_vma; | |
5191 | case DT_JMPREL: | |
5192 | name = ".rel.plt"; | |
5193 | get_vma: | |
5194 | s = bfd_get_section_by_name (output_bfd, name); | |
5195 | BFD_ASSERT (s != NULL); | |
229fcec5 MM |
5196 | if (!htab->symbian_p) |
5197 | dyn.d_un.d_ptr = s->vma; | |
5198 | else | |
5199 | /* In the BPABI, tags in the PT_DYNAMIC section point | |
5200 | at the file offset, not the memory address, for the | |
5201 | convenience of the post linker. */ | |
5202 | dyn.d_un.d_ptr = s->filepos; | |
252b5132 RH |
5203 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
5204 | break; | |
5205 | ||
229fcec5 MM |
5206 | get_vma_if_bpabi: |
5207 | if (htab->symbian_p) | |
5208 | goto get_vma; | |
5209 | break; | |
5210 | ||
252b5132 RH |
5211 | case DT_PLTRELSZ: |
5212 | s = bfd_get_section_by_name (output_bfd, ".rel.plt"); | |
5213 | BFD_ASSERT (s != NULL); | |
eea6121a | 5214 | dyn.d_un.d_val = s->size; |
252b5132 RH |
5215 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
5216 | break; | |
229fcec5 | 5217 | |
252b5132 | 5218 | case DT_RELSZ: |
229fcec5 MM |
5219 | if (!htab->symbian_p) |
5220 | { | |
5221 | /* My reading of the SVR4 ABI indicates that the | |
5222 | procedure linkage table relocs (DT_JMPREL) should be | |
5223 | included in the overall relocs (DT_REL). This is | |
5224 | what Solaris does. However, UnixWare can not handle | |
5225 | that case. Therefore, we override the DT_RELSZ entry | |
5226 | here to make it not include the JMPREL relocs. Since | |
5227 | the linker script arranges for .rel.plt to follow all | |
5228 | other relocation sections, we don't have to worry | |
5229 | about changing the DT_REL entry. */ | |
5230 | s = bfd_get_section_by_name (output_bfd, ".rel.plt"); | |
5231 | if (s != NULL) | |
5232 | dyn.d_un.d_val -= s->size; | |
5233 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
5234 | break; | |
5235 | } | |
5236 | /* Fall through */ | |
5237 | ||
5238 | case DT_REL: | |
5239 | case DT_RELA: | |
5240 | case DT_RELASZ: | |
5241 | /* In the BPABI, the DT_REL tag must point at the file | |
5242 | offset, not the VMA, of the first relocation | |
5243 | section. So, we use code similar to that in | |
5244 | elflink.c, but do not check for SHF_ALLOC on the | |
5245 | relcoation section, since relocations sections are | |
5246 | never allocated under the BPABI. The comments above | |
5247 | about Unixware notwithstanding, we include all of the | |
5248 | relocations here. */ | |
5249 | if (htab->symbian_p) | |
5250 | { | |
5251 | unsigned int i; | |
5252 | type = ((dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ) | |
5253 | ? SHT_REL : SHT_RELA); | |
5254 | dyn.d_un.d_val = 0; | |
5255 | for (i = 1; i < elf_numsections (output_bfd); i++) | |
5256 | { | |
5257 | Elf_Internal_Shdr *hdr | |
5258 | = elf_elfsections (output_bfd)[i]; | |
5259 | if (hdr->sh_type == type) | |
5260 | { | |
5261 | if (dyn.d_tag == DT_RELSZ | |
5262 | || dyn.d_tag == DT_RELASZ) | |
5263 | dyn.d_un.d_val += hdr->sh_size; | |
de52dba4 AM |
5264 | else if ((ufile_ptr) hdr->sh_offset |
5265 | <= dyn.d_un.d_val - 1) | |
229fcec5 MM |
5266 | dyn.d_un.d_val = hdr->sh_offset; |
5267 | } | |
5268 | } | |
5269 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
5270 | } | |
252b5132 | 5271 | break; |
88f7bcd5 NC |
5272 | |
5273 | /* Set the bottom bit of DT_INIT/FINI if the | |
5274 | corresponding function is Thumb. */ | |
5275 | case DT_INIT: | |
5276 | name = info->init_function; | |
5277 | goto get_sym; | |
5278 | case DT_FINI: | |
5279 | name = info->fini_function; | |
5280 | get_sym: | |
5281 | /* If it wasn't set by elf_bfd_final_link | |
4cc11e76 | 5282 | then there is nothing to adjust. */ |
88f7bcd5 NC |
5283 | if (dyn.d_un.d_val != 0) |
5284 | { | |
5285 | struct elf_link_hash_entry * eh; | |
5286 | ||
5287 | eh = elf_link_hash_lookup (elf_hash_table (info), name, | |
b34976b6 | 5288 | FALSE, FALSE, TRUE); |
88f7bcd5 NC |
5289 | if (eh != (struct elf_link_hash_entry *) NULL |
5290 | && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC) | |
5291 | { | |
5292 | dyn.d_un.d_val |= 1; | |
b34976b6 | 5293 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
88f7bcd5 NC |
5294 | } |
5295 | } | |
5296 | break; | |
252b5132 RH |
5297 | } |
5298 | } | |
5299 | ||
24a1ba0f | 5300 | /* Fill in the first entry in the procedure linkage table. */ |
e5a52504 | 5301 | if (splt->size > 0 && elf32_arm_hash_table (info)->plt_header_size) |
f7a74f8c | 5302 | { |
5e681ec4 PB |
5303 | bfd_vma got_displacement; |
5304 | ||
5305 | /* Calculate the displacement between the PLT slot and &GOT[0]. */ | |
5306 | got_displacement = (sgot->output_section->vma | |
5307 | + sgot->output_offset | |
5308 | - splt->output_section->vma | |
5309 | - splt->output_offset | |
5310 | - 16); | |
5311 | ||
f7a74f8c NC |
5312 | bfd_put_32 (output_bfd, elf32_arm_plt0_entry[0], splt->contents + 0); |
5313 | bfd_put_32 (output_bfd, elf32_arm_plt0_entry[1], splt->contents + 4); | |
5314 | bfd_put_32 (output_bfd, elf32_arm_plt0_entry[2], splt->contents + 8); | |
5315 | bfd_put_32 (output_bfd, elf32_arm_plt0_entry[3], splt->contents + 12); | |
5e681ec4 PB |
5316 | #ifdef FOUR_WORD_PLT |
5317 | /* The displacement value goes in the otherwise-unused last word of | |
5318 | the second entry. */ | |
5319 | bfd_put_32 (output_bfd, got_displacement, splt->contents + 28); | |
5320 | #else | |
5321 | bfd_put_32 (output_bfd, got_displacement, splt->contents + 16); | |
5322 | #endif | |
f7a74f8c | 5323 | } |
252b5132 RH |
5324 | |
5325 | /* UnixWare sets the entsize of .plt to 4, although that doesn't | |
5326 | really seem like the right value. */ | |
5327 | elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4; | |
5328 | } | |
5329 | ||
5330 | /* Fill in the first three entries in the global offset table. */ | |
229fcec5 | 5331 | if (sgot) |
252b5132 | 5332 | { |
229fcec5 MM |
5333 | if (sgot->size > 0) |
5334 | { | |
5335 | if (sdyn == NULL) | |
5336 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); | |
5337 | else | |
5338 | bfd_put_32 (output_bfd, | |
5339 | sdyn->output_section->vma + sdyn->output_offset, | |
5340 | sgot->contents); | |
5341 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); | |
5342 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); | |
5343 | } | |
252b5132 | 5344 | |
229fcec5 MM |
5345 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; |
5346 | } | |
252b5132 | 5347 | |
b34976b6 | 5348 | return TRUE; |
252b5132 RH |
5349 | } |
5350 | ||
ba96a88f | 5351 | static void |
57e8b36a | 5352 | elf32_arm_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED) |
ba96a88f | 5353 | { |
9b485d32 | 5354 | Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */ |
e489d0ae | 5355 | struct elf32_arm_link_hash_table *globals; |
ba96a88f NC |
5356 | |
5357 | i_ehdrp = elf_elfheader (abfd); | |
5358 | ||
94a3258f PB |
5359 | if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_UNKNOWN) |
5360 | i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_ARM; | |
5361 | else | |
5362 | i_ehdrp->e_ident[EI_OSABI] = 0; | |
ba96a88f | 5363 | i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION; |
e489d0ae | 5364 | |
93204d3a PB |
5365 | if (link_info) |
5366 | { | |
5367 | globals = elf32_arm_hash_table (link_info); | |
5368 | if (globals->byteswap_code) | |
5369 | i_ehdrp->e_flags |= EF_ARM_BE8; | |
5370 | } | |
ba96a88f NC |
5371 | } |
5372 | ||
99e4ae17 | 5373 | static enum elf_reloc_type_class |
57e8b36a | 5374 | elf32_arm_reloc_type_class (const Elf_Internal_Rela *rela) |
99e4ae17 | 5375 | { |
f51e552e | 5376 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
99e4ae17 AJ |
5377 | { |
5378 | case R_ARM_RELATIVE: | |
5379 | return reloc_class_relative; | |
5380 | case R_ARM_JUMP_SLOT: | |
5381 | return reloc_class_plt; | |
5382 | case R_ARM_COPY: | |
5383 | return reloc_class_copy; | |
5384 | default: | |
5385 | return reloc_class_normal; | |
5386 | } | |
5387 | } | |
5388 | ||
e16bb312 NC |
5389 | /* Set the right machine number for an Arm ELF file. */ |
5390 | ||
5391 | static bfd_boolean | |
57e8b36a | 5392 | elf32_arm_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr) |
e16bb312 NC |
5393 | { |
5394 | if (hdr->sh_type == SHT_NOTE) | |
5395 | *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS; | |
5396 | ||
5397 | return TRUE; | |
5398 | } | |
5399 | ||
e489d0ae | 5400 | static void |
57e8b36a | 5401 | elf32_arm_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED) |
e16bb312 | 5402 | { |
5a6c6817 | 5403 | bfd_arm_update_notes (abfd, ARM_NOTE_SECTION); |
e16bb312 NC |
5404 | } |
5405 | ||
40a18ebd NC |
5406 | /* Return TRUE if this is an unwinding table entry. */ |
5407 | ||
5408 | static bfd_boolean | |
5409 | is_arm_elf_unwind_section_name (bfd * abfd ATTRIBUTE_UNUSED, const char * name) | |
5410 | { | |
5411 | size_t len1, len2; | |
5412 | ||
5413 | len1 = sizeof (ELF_STRING_ARM_unwind) - 1; | |
5414 | len2 = sizeof (ELF_STRING_ARM_unwind_once) - 1; | |
5415 | return (strncmp (name, ELF_STRING_ARM_unwind, len1) == 0 | |
5416 | || strncmp (name, ELF_STRING_ARM_unwind_once, len2) == 0); | |
5417 | } | |
5418 | ||
5419 | ||
5420 | /* Set the type and flags for an ARM section. We do this by | |
5421 | the section name, which is a hack, but ought to work. */ | |
5422 | ||
5423 | static bfd_boolean | |
5424 | elf32_arm_fake_sections (bfd * abfd, Elf_Internal_Shdr * hdr, asection * sec) | |
5425 | { | |
5426 | const char * name; | |
5427 | ||
5428 | name = bfd_get_section_name (abfd, sec); | |
5429 | ||
5430 | if (is_arm_elf_unwind_section_name (abfd, name)) | |
5431 | { | |
5432 | hdr->sh_type = SHT_ARM_EXIDX; | |
5433 | hdr->sh_flags |= SHF_LINK_ORDER; | |
5434 | } | |
5435 | return TRUE; | |
5436 | } | |
5437 | ||
5438 | /* Handle an ARM specific section when reading an object file. | |
5439 | This is called when elf.c finds a section with an unknown type. */ | |
5440 | ||
5441 | static bfd_boolean | |
5442 | elf32_arm_section_from_shdr (bfd *abfd, | |
5443 | Elf_Internal_Shdr * hdr, | |
5444 | const char *name) | |
5445 | { | |
5446 | /* There ought to be a place to keep ELF backend specific flags, but | |
5447 | at the moment there isn't one. We just keep track of the | |
5448 | sections by their name, instead. Fortunately, the ABI gives | |
5449 | names for all the ARM specific sections, so we will probably get | |
5450 | away with this. */ | |
5451 | switch (hdr->sh_type) | |
5452 | { | |
5453 | case SHT_ARM_EXIDX: | |
5454 | break; | |
5455 | ||
5456 | default: | |
5457 | return FALSE; | |
5458 | } | |
5459 | ||
5460 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name)) | |
5461 | return FALSE; | |
5462 | ||
5463 | return TRUE; | |
5464 | } | |
e489d0ae PB |
5465 | |
5466 | /* Called for each symbol. Builds a section map based on mapping symbols. | |
5467 | Does not alter any of the symbols. */ | |
5468 | ||
5469 | static bfd_boolean | |
5470 | elf32_arm_output_symbol_hook (struct bfd_link_info *info, | |
5471 | const char *name, | |
5472 | Elf_Internal_Sym *elfsym, | |
5473 | asection *input_sec, | |
5474 | struct elf_link_hash_entry *h ATTRIBUTE_UNUSED) | |
5475 | { | |
5476 | int mapcount; | |
5477 | elf32_arm_section_map *map; | |
5478 | struct elf32_arm_link_hash_table *globals; | |
5479 | ||
5480 | /* Only do this on final link. */ | |
5481 | if (info->relocatable) | |
5482 | return TRUE; | |
5483 | ||
5484 | /* Only build a map if we need to byteswap code. */ | |
5485 | globals = elf32_arm_hash_table (info); | |
5486 | if (!globals->byteswap_code) | |
5487 | return TRUE; | |
5488 | ||
5489 | /* We only want mapping symbols. */ | |
0367ecfb | 5490 | if (! is_arm_mapping_symbol_name (name)) |
e489d0ae PB |
5491 | return TRUE; |
5492 | ||
5493 | mapcount = ++(elf32_arm_section_data (input_sec)->mapcount); | |
5494 | map = elf32_arm_section_data (input_sec)->map; | |
5495 | /* TODO: This may be inefficient, but we probably don't usually have many | |
5496 | mapping symbols per section. */ | |
5497 | map = bfd_realloc (map, mapcount * sizeof (elf32_arm_section_map)); | |
5498 | elf32_arm_section_data (input_sec)->map = map; | |
57e8b36a | 5499 | |
e489d0ae PB |
5500 | map[mapcount - 1].vma = elfsym->st_value; |
5501 | map[mapcount - 1].type = name[1]; | |
5502 | return TRUE; | |
5503 | } | |
5504 | ||
5505 | ||
5506 | /* Allocate target specific section data. */ | |
5507 | ||
5508 | static bfd_boolean | |
5509 | elf32_arm_new_section_hook (bfd *abfd, asection *sec) | |
5510 | { | |
5511 | struct _arm_elf_section_data *sdata; | |
5512 | bfd_size_type amt = sizeof (*sdata); | |
5513 | ||
5514 | sdata = bfd_zalloc (abfd, amt); | |
5515 | if (sdata == NULL) | |
5516 | return FALSE; | |
5517 | sec->used_by_bfd = sdata; | |
5518 | ||
5519 | return _bfd_elf_new_section_hook (abfd, sec); | |
5520 | } | |
5521 | ||
5522 | ||
5523 | /* Used to order a list of mapping symbols by address. */ | |
5524 | ||
5525 | static int | |
5526 | elf32_arm_compare_mapping (const void * a, const void * b) | |
5527 | { | |
5528 | return ((const elf32_arm_section_map *) a)->vma | |
5529 | > ((const elf32_arm_section_map *) b)->vma; | |
5530 | } | |
5531 | ||
5532 | ||
5533 | /* Do code byteswapping. Return FALSE afterwards so that the section is | |
5534 | written out as normal. */ | |
5535 | ||
5536 | static bfd_boolean | |
5537 | elf32_arm_write_section (bfd *output_bfd ATTRIBUTE_UNUSED, asection *sec, | |
5538 | bfd_byte *contents) | |
5539 | { | |
5540 | int mapcount; | |
5541 | elf32_arm_section_map *map; | |
5542 | bfd_vma ptr; | |
5543 | bfd_vma end; | |
5544 | bfd_vma offset; | |
5545 | bfd_byte tmp; | |
5546 | int i; | |
57e8b36a | 5547 | |
e489d0ae PB |
5548 | mapcount = elf32_arm_section_data (sec)->mapcount; |
5549 | map = elf32_arm_section_data (sec)->map; | |
5550 | ||
5551 | if (mapcount == 0) | |
5552 | return FALSE; | |
5553 | ||
5554 | qsort (map, mapcount, sizeof (elf32_arm_section_map), | |
5555 | elf32_arm_compare_mapping); | |
5556 | ||
5557 | offset = sec->output_section->vma + sec->output_offset; | |
5558 | ptr = map[0].vma - offset; | |
5559 | for (i = 0; i < mapcount; i++) | |
5560 | { | |
5561 | if (i == mapcount - 1) | |
eea6121a | 5562 | end = sec->size; |
e489d0ae PB |
5563 | else |
5564 | end = map[i + 1].vma - offset; | |
57e8b36a | 5565 | |
e489d0ae PB |
5566 | switch (map[i].type) |
5567 | { | |
5568 | case 'a': | |
5569 | /* Byte swap code words. */ | |
5570 | while (ptr + 3 < end) | |
5571 | { | |
5572 | tmp = contents[ptr]; | |
5573 | contents[ptr] = contents[ptr + 3]; | |
5574 | contents[ptr + 3] = tmp; | |
5575 | tmp = contents[ptr + 1]; | |
5576 | contents[ptr + 1] = contents[ptr + 2]; | |
5577 | contents[ptr + 2] = tmp; | |
5578 | ptr += 4; | |
5579 | } | |
5580 | break; | |
5581 | ||
5582 | case 't': | |
5583 | /* Byte swap code halfwords. */ | |
5584 | while (ptr + 1 < end) | |
5585 | { | |
5586 | tmp = contents[ptr]; | |
5587 | contents[ptr] = contents[ptr + 1]; | |
5588 | contents[ptr + 1] = tmp; | |
5589 | ptr += 2; | |
5590 | } | |
5591 | break; | |
5592 | ||
5593 | case 'd': | |
5594 | /* Leave data alone. */ | |
5595 | break; | |
5596 | } | |
5597 | ptr = end; | |
5598 | } | |
93204d3a | 5599 | free (map); |
e489d0ae PB |
5600 | return FALSE; |
5601 | } | |
5602 | ||
b7693d02 DJ |
5603 | /* Display STT_ARM_TFUNC symbols as functions. */ |
5604 | ||
5605 | static void | |
5606 | elf32_arm_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, | |
5607 | asymbol *asym) | |
5608 | { | |
5609 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; | |
5610 | ||
5611 | if (ELF_ST_TYPE (elfsym->internal_elf_sym.st_info) == STT_ARM_TFUNC) | |
5612 | elfsym->symbol.flags |= BSF_FUNCTION; | |
5613 | } | |
5614 | ||
0beaef2b PB |
5615 | |
5616 | /* Mangle thumb function symbols as we read them in. */ | |
5617 | ||
5618 | static void | |
5619 | elf32_arm_swap_symbol_in (bfd * abfd, | |
5620 | const void *psrc, | |
5621 | const void *pshn, | |
5622 | Elf_Internal_Sym *dst) | |
5623 | { | |
5624 | bfd_elf32_swap_symbol_in (abfd, psrc, pshn, dst); | |
5625 | ||
5626 | /* New EABI objects mark thumb function symbols by setting the low bit of | |
5627 | the address. Turn these into STT_ARM_TFUNC. */ | |
5628 | if (ELF_ST_TYPE (dst->st_info) == STT_FUNC | |
5629 | && (dst->st_value & 1)) | |
5630 | { | |
5631 | dst->st_info = ELF_ST_INFO (ELF_ST_BIND (dst->st_info), STT_ARM_TFUNC); | |
5632 | dst->st_value &= ~(bfd_vma) 1; | |
5633 | } | |
5634 | } | |
5635 | ||
5636 | ||
5637 | /* Mangle thumb function symbols as we write them out. */ | |
5638 | ||
5639 | static void | |
5640 | elf32_arm_swap_symbol_out (bfd *abfd, | |
5641 | const Elf_Internal_Sym *src, | |
5642 | void *cdst, | |
5643 | void *shndx) | |
5644 | { | |
5645 | Elf_Internal_Sym newsym; | |
5646 | ||
5647 | /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit | |
5648 | of the address set, as per the new EABI. We do this unconditionally | |
5649 | because objcopy does not set the elf header flags until after | |
5650 | it writes out the symbol table. */ | |
5651 | if (ELF_ST_TYPE (src->st_info) == STT_ARM_TFUNC) | |
5652 | { | |
5653 | newsym = *src; | |
5654 | newsym.st_info = ELF_ST_INFO (ELF_ST_BIND (src->st_info), STT_FUNC); | |
5655 | newsym.st_value |= 1; | |
5656 | ||
5657 | src = &newsym; | |
5658 | } | |
5659 | bfd_elf32_swap_symbol_out (abfd, src, cdst, shndx); | |
5660 | } | |
5661 | ||
5662 | /* We use this to override swap_symbol_in and swap_symbol_out. */ | |
5663 | const struct elf_size_info elf32_arm_size_info = { | |
5664 | sizeof (Elf32_External_Ehdr), | |
5665 | sizeof (Elf32_External_Phdr), | |
5666 | sizeof (Elf32_External_Shdr), | |
5667 | sizeof (Elf32_External_Rel), | |
5668 | sizeof (Elf32_External_Rela), | |
5669 | sizeof (Elf32_External_Sym), | |
5670 | sizeof (Elf32_External_Dyn), | |
5671 | sizeof (Elf_External_Note), | |
5672 | 4, | |
5673 | 1, | |
5674 | 32, 2, | |
5675 | ELFCLASS32, EV_CURRENT, | |
5676 | bfd_elf32_write_out_phdrs, | |
5677 | bfd_elf32_write_shdrs_and_ehdr, | |
5678 | bfd_elf32_write_relocs, | |
5679 | elf32_arm_swap_symbol_in, | |
5680 | elf32_arm_swap_symbol_out, | |
5681 | bfd_elf32_slurp_reloc_table, | |
5682 | bfd_elf32_slurp_symbol_table, | |
5683 | bfd_elf32_swap_dyn_in, | |
5684 | bfd_elf32_swap_dyn_out, | |
5685 | bfd_elf32_swap_reloc_in, | |
5686 | bfd_elf32_swap_reloc_out, | |
5687 | bfd_elf32_swap_reloca_in, | |
5688 | bfd_elf32_swap_reloca_out | |
5689 | }; | |
5690 | ||
252b5132 RH |
5691 | #define ELF_ARCH bfd_arch_arm |
5692 | #define ELF_MACHINE_CODE EM_ARM | |
d0facd1b NC |
5693 | #ifdef __QNXTARGET__ |
5694 | #define ELF_MAXPAGESIZE 0x1000 | |
5695 | #else | |
f21f3fe0 | 5696 | #define ELF_MAXPAGESIZE 0x8000 |
d0facd1b | 5697 | #endif |
252b5132 | 5698 | |
99e4ae17 AJ |
5699 | #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data |
5700 | #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data | |
252b5132 RH |
5701 | #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags |
5702 | #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data | |
5703 | #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create | |
dc810e39 | 5704 | #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup |
252b5132 | 5705 | #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line |
e489d0ae | 5706 | #define bfd_elf32_new_section_hook elf32_arm_new_section_hook |
3c9458e9 | 5707 | #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol |
252b5132 RH |
5708 | |
5709 | #define elf_backend_get_symbol_type elf32_arm_get_symbol_type | |
5710 | #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook | |
5711 | #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook | |
5712 | #define elf_backend_check_relocs elf32_arm_check_relocs | |
dc810e39 | 5713 | #define elf_backend_relocate_section elf32_arm_relocate_section |
e489d0ae | 5714 | #define elf_backend_write_section elf32_arm_write_section |
252b5132 | 5715 | #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol |
5e681ec4 | 5716 | #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections |
252b5132 RH |
5717 | #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol |
5718 | #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections | |
e489d0ae | 5719 | #define elf_backend_link_output_symbol_hook elf32_arm_output_symbol_hook |
252b5132 | 5720 | #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections |
ba96a88f | 5721 | #define elf_backend_post_process_headers elf32_arm_post_process_headers |
99e4ae17 | 5722 | #define elf_backend_reloc_type_class elf32_arm_reloc_type_class |
c178919b | 5723 | #define elf_backend_object_p elf32_arm_object_p |
e16bb312 | 5724 | #define elf_backend_section_flags elf32_arm_section_flags |
40a18ebd NC |
5725 | #define elf_backend_fake_sections elf32_arm_fake_sections |
5726 | #define elf_backend_section_from_shdr elf32_arm_section_from_shdr | |
e16bb312 | 5727 | #define elf_backend_final_write_processing elf32_arm_final_write_processing |
5e681ec4 | 5728 | #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol |
b7693d02 | 5729 | #define elf_backend_symbol_processing elf32_arm_symbol_processing |
0beaef2b | 5730 | #define elf_backend_size_info elf32_arm_size_info |
252b5132 | 5731 | |
5e681ec4 | 5732 | #define elf_backend_can_refcount 1 |
252b5132 RH |
5733 | #define elf_backend_can_gc_sections 1 |
5734 | #define elf_backend_plt_readonly 1 | |
5735 | #define elf_backend_want_got_plt 1 | |
5736 | #define elf_backend_want_plt_sym 0 | |
acf8aed4 | 5737 | #if !USE_REL |
b491616a AM |
5738 | #define elf_backend_rela_normal 1 |
5739 | #endif | |
252b5132 | 5740 | |
04f7c78d | 5741 | #define elf_backend_got_header_size 12 |
04f7c78d | 5742 | |
252b5132 | 5743 | #include "elf32-target.h" |
7f266840 DJ |
5744 | |
5745 | /* Symbian OS Targets */ | |
5746 | ||
5747 | #undef TARGET_LITTLE_SYM | |
5748 | #define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec | |
5749 | #undef TARGET_LITTLE_NAME | |
5750 | #define TARGET_LITTLE_NAME "elf32-littlearm-symbian" | |
5751 | #undef TARGET_BIG_SYM | |
5752 | #define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec | |
5753 | #undef TARGET_BIG_NAME | |
5754 | #define TARGET_BIG_NAME "elf32-bigarm-symbian" | |
5755 | ||
5756 | /* Like elf32_arm_link_hash_table_create -- but overrides | |
5757 | appropriately for Symbian OS. */ | |
5758 | static struct bfd_link_hash_table * | |
5759 | elf32_arm_symbian_link_hash_table_create (bfd *abfd) | |
5760 | { | |
5761 | struct bfd_link_hash_table *ret; | |
5762 | ||
5763 | ret = elf32_arm_link_hash_table_create (abfd); | |
5764 | if (ret) | |
5765 | { | |
5766 | struct elf32_arm_link_hash_table *htab | |
5767 | = (struct elf32_arm_link_hash_table *)ret; | |
5768 | /* There is no PLT header for Symbian OS. */ | |
5769 | htab->plt_header_size = 0; | |
5770 | /* The PLT entries are each three instructions. */ | |
5771 | htab->plt_entry_size = 4 * NUM_ELEM (elf32_arm_symbian_plt_entry); | |
5772 | htab->symbian_p = 1; | |
5773 | } | |
5774 | return ret; | |
5775 | } | |
5776 | ||
5777 | /* In a BPABI executable, the dynamic linking sections do not go in | |
5778 | the loadable read-only segment. The post-linker may wish to refer | |
5779 | to these sections, but they are not part of the final program | |
5780 | image. */ | |
5781 | static struct bfd_elf_special_section const | |
5782 | elf32_arm_symbian_special_sections[]= | |
5783 | { | |
5784 | { ".dynamic", 8, 0, SHT_DYNAMIC, 0 }, | |
5785 | { ".dynstr", 7, 0, SHT_STRTAB, 0 }, | |
5786 | { ".dynsym", 7, 0, SHT_DYNSYM, 0 }, | |
5787 | { ".got", 4, 0, SHT_PROGBITS, 0 }, | |
5788 | { ".hash", 5, 0, SHT_HASH, 0 }, | |
5789 | { NULL, 0, 0, 0, 0 } | |
5790 | }; | |
5791 | ||
c3c76620 | 5792 | static void |
b34af79c MM |
5793 | elf32_arm_symbian_begin_write_processing (bfd *abfd, |
5794 | struct bfd_link_info *link_info | |
5795 | ATTRIBUTE_UNUSED) | |
c3c76620 MM |
5796 | { |
5797 | /* BPABI objects are never loaded directly by an OS kernel; they are | |
5798 | processed by a postlinker first, into an OS-specific format. If | |
5799 | the D_PAGED bit is set on the file, BFD will align segments on | |
5800 | page boundaries, so that an OS can directly map the file. With | |
5801 | BPABI objects, that just results in wasted space. In addition, | |
5802 | because we clear the D_PAGED bit, map_sections_to_segments will | |
5803 | recognize that the program headers should not be mapped into any | |
5804 | loadable segment. */ | |
5805 | abfd->flags &= ~D_PAGED; | |
5806 | } | |
7f266840 DJ |
5807 | |
5808 | static bfd_boolean | |
b34af79c MM |
5809 | elf32_arm_symbian_modify_segment_map (bfd *abfd, |
5810 | struct bfd_link_info *info | |
5811 | ATTRIBUTE_UNUSED) | |
7f266840 DJ |
5812 | { |
5813 | struct elf_segment_map *m; | |
5814 | asection *dynsec; | |
5815 | ||
7f266840 DJ |
5816 | /* BPABI shared libraries and executables should have a PT_DYNAMIC |
5817 | segment. However, because the .dynamic section is not marked | |
5818 | with SEC_LOAD, the generic ELF code will not create such a | |
5819 | segment. */ | |
5820 | dynsec = bfd_get_section_by_name (abfd, ".dynamic"); | |
5821 | if (dynsec) | |
5822 | { | |
5823 | m = _bfd_elf_make_dynamic_segment (abfd, dynsec); | |
5824 | m->next = elf_tdata (abfd)->segment_map; | |
5825 | elf_tdata (abfd)->segment_map = m; | |
5826 | } | |
5827 | ||
5828 | return TRUE; | |
5829 | } | |
5830 | ||
5831 | #undef elf32_bed | |
5832 | #define elf32_bed elf32_arm_symbian_bed | |
5833 | ||
5834 | /* The dynamic sections are not allocated on SymbianOS; the postlinker | |
5835 | will process them and then discard them. */ | |
5836 | #undef ELF_DYNAMIC_SEC_FLAGS | |
5837 | #define ELF_DYNAMIC_SEC_FLAGS \ | |
5838 | (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED) | |
5839 | ||
5840 | #undef bfd_elf32_bfd_link_hash_table_create | |
5841 | #define bfd_elf32_bfd_link_hash_table_create \ | |
5842 | elf32_arm_symbian_link_hash_table_create | |
5843 | ||
5844 | #undef elf_backend_special_sections | |
5845 | #define elf_backend_special_sections elf32_arm_symbian_special_sections | |
5846 | ||
c3c76620 MM |
5847 | #undef elf_backend_begin_write_processing |
5848 | #define elf_backend_begin_write_processing \ | |
5849 | elf32_arm_symbian_begin_write_processing | |
5850 | ||
7f266840 DJ |
5851 | #undef elf_backend_modify_segment_map |
5852 | #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map | |
5853 | ||
5854 | /* There is no .got section for BPABI objects, and hence no header. */ | |
5855 | #undef elf_backend_got_header_size | |
5856 | #define elf_backend_got_header_size 0 | |
5857 | ||
5858 | /* Similarly, there is no .got.plt section. */ | |
5859 | #undef elf_backend_want_got_plt | |
5860 | #define elf_backend_want_got_plt 0 | |
5861 | ||
5862 | #include "elf32-target.h" |