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252b5132 | 1 | /* 32-bit ELF support for ARM old abi option. |
5bc56484 | 2 | Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc. |
252b5132 RH |
3 | |
4 | This file is part of BFD, the Binary File Descriptor library. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
19 | ||
dfc5f959 | 20 | #define OLD_ARM_ABI |
5bc56484 AM |
21 | #define bfd_elf32_arm_allocate_interworking_sections \ |
22 | bfd_elf32_arm_oabi_allocate_interworking_sections | |
23 | #define bfd_elf32_arm_get_bfd_for_interworking \ | |
24 | bfd_elf32_arm_oabi_get_bfd_for_interworking | |
25 | #define bfd_elf32_arm_process_before_allocation \ | |
26 | bfd_elf32_arm_oabi_process_before_allocation | |
27 | #define bfd_elf32_arm_add_glue_sections_to_bfd \ | |
28 | bfd_elf32_arm_oabi_add_glue_sections_to_bfd | |
dfc5f959 NC |
29 | |
30 | #include "elf/arm.h" | |
252b5132 RH |
31 | #include "bfd.h" |
32 | #include "sysdep.h" | |
33 | #include "libbfd.h" | |
34 | #include "elf-bfd.h" | |
35 | ||
5f97aa0c NC |
36 | #ifndef NUM_ELEM |
37 | #define NUM_ELEM(a) (sizeof (a) / sizeof (a)[0]) | |
38 | #endif | |
39 | ||
252b5132 RH |
40 | #define TARGET_LITTLE_SYM bfd_elf32_littlearm_oabi_vec |
41 | #define TARGET_LITTLE_NAME "elf32-littlearm-oabi" | |
42 | #define TARGET_BIG_SYM bfd_elf32_bigarm_oabi_vec | |
43 | #define TARGET_BIG_NAME "elf32-bigarm-oabi" | |
44 | ||
45 | #define elf_info_to_howto elf32_arm_info_to_howto | |
46 | #define elf_info_to_howto_rel 0 | |
47 | ||
ba96a88f NC |
48 | #define ARM_ELF_ABI_VERSION 0 |
49 | #define ARM_ELF_OS_ABI_VERSION 0 | |
50 | ||
917583ad NC |
51 | static reloc_howto_type * find_howto PARAMS ((unsigned int)); |
52 | static void elf32_arm_info_to_howto PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *)); | |
53 | static reloc_howto_type * elf32_arm_reloc_type_lookup PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
54 | ||
252b5132 | 55 | static reloc_howto_type elf32_arm_howto_table[] = |
917583ad NC |
56 | { |
57 | /* No relocation. */ | |
58 | HOWTO (R_ARM_NONE, /* type */ | |
59 | 0, /* rightshift */ | |
60 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
61 | 0, /* bitsize */ | |
62 | false, /* pc_relative */ | |
63 | 0, /* bitpos */ | |
64 | complain_overflow_dont, /* complain_on_overflow */ | |
65 | bfd_elf_generic_reloc, /* special_function */ | |
66 | "R_ARM_NONE", /* name */ | |
67 | false, /* partial_inplace */ | |
68 | 0, /* src_mask */ | |
69 | 0, /* dst_mask */ | |
70 | false), /* pcrel_offset */ | |
71 | ||
72 | HOWTO (R_ARM_PC24, /* type */ | |
73 | 2, /* rightshift */ | |
74 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
75 | 24, /* bitsize */ | |
76 | true, /* pc_relative */ | |
77 | 0, /* bitpos */ | |
78 | complain_overflow_signed, /* complain_on_overflow */ | |
79 | bfd_elf_generic_reloc, /* special_function */ | |
80 | "R_ARM_PC24", /* name */ | |
81 | false, /* partial_inplace */ | |
82 | 0x00ffffff, /* src_mask */ | |
83 | 0x00ffffff, /* dst_mask */ | |
84 | true), /* pcrel_offset */ | |
85 | ||
86 | /* 32 bit absolute. */ | |
87 | HOWTO (R_ARM_ABS32, /* type */ | |
88 | 0, /* rightshift */ | |
89 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
90 | 32, /* bitsize */ | |
91 | false, /* pc_relative */ | |
92 | 0, /* bitpos */ | |
93 | complain_overflow_bitfield, /* complain_on_overflow */ | |
94 | bfd_elf_generic_reloc, /* special_function */ | |
95 | "R_ARM_ABS32", /* name */ | |
96 | false, /* partial_inplace */ | |
97 | 0xffffffff, /* src_mask */ | |
98 | 0xffffffff, /* dst_mask */ | |
99 | false), /* pcrel_offset */ | |
100 | ||
101 | /* Standard 32bit pc-relative reloc. */ | |
102 | HOWTO (R_ARM_REL32, /* type */ | |
103 | 0, /* rightshift */ | |
104 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
105 | 32, /* bitsize */ | |
106 | true, /* pc_relative */ | |
107 | 0, /* bitpos */ | |
108 | complain_overflow_bitfield, /* complain_on_overflow */ | |
109 | bfd_elf_generic_reloc, /* special_function */ | |
110 | "R_ARM_REL32", /* name */ | |
111 | false, /* partial_inplace */ | |
112 | 0xffffffff, /* src_mask */ | |
113 | 0xffffffff, /* dst_mask */ | |
114 | true), /* pcrel_offset */ | |
115 | ||
116 | /* 8 bit absolute. */ | |
117 | HOWTO (R_ARM_ABS8, /* type */ | |
118 | 0, /* rightshift */ | |
119 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
120 | 8, /* bitsize */ | |
121 | false, /* pc_relative */ | |
122 | 0, /* bitpos */ | |
123 | complain_overflow_bitfield, /* complain_on_overflow */ | |
124 | bfd_elf_generic_reloc, /* special_function */ | |
125 | "R_ARM_ABS8", /* name */ | |
126 | false, /* partial_inplace */ | |
127 | 0x000000ff, /* src_mask */ | |
128 | 0x000000ff, /* dst_mask */ | |
129 | false), /* pcrel_offset */ | |
130 | ||
131 | /* 16 bit absolute. */ | |
132 | HOWTO (R_ARM_ABS16, /* type */ | |
133 | 0, /* rightshift */ | |
134 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
135 | 16, /* bitsize */ | |
136 | false, /* pc_relative */ | |
137 | 0, /* bitpos */ | |
138 | complain_overflow_bitfield, /* complain_on_overflow */ | |
139 | bfd_elf_generic_reloc, /* special_function */ | |
140 | "R_ARM_ABS16", /* name */ | |
141 | false, /* partial_inplace */ | |
142 | 0, /* src_mask */ | |
143 | 0, /* dst_mask */ | |
144 | false), /* pcrel_offset */ | |
145 | ||
146 | /* 12 bit absolute. */ | |
147 | HOWTO (R_ARM_ABS12, /* type */ | |
148 | 0, /* rightshift */ | |
149 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
150 | 12, /* bitsize */ | |
151 | false, /* pc_relative */ | |
152 | 0, /* bitpos */ | |
153 | complain_overflow_bitfield, /* complain_on_overflow */ | |
154 | bfd_elf_generic_reloc, /* special_function */ | |
155 | "R_ARM_ABS12", /* name */ | |
156 | false, /* partial_inplace */ | |
157 | 0x000008ff, /* src_mask */ | |
158 | 0x000008ff, /* dst_mask */ | |
159 | false), /* pcrel_offset */ | |
160 | ||
161 | HOWTO (R_ARM_THM_ABS5, /* type */ | |
162 | 6, /* rightshift */ | |
163 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
164 | 5, /* bitsize */ | |
165 | false, /* pc_relative */ | |
166 | 0, /* bitpos */ | |
167 | complain_overflow_bitfield, /* complain_on_overflow */ | |
168 | bfd_elf_generic_reloc, /* special_function */ | |
169 | "R_ARM_THM_ABS5", /* name */ | |
170 | false, /* partial_inplace */ | |
171 | 0x000007e0, /* src_mask */ | |
172 | 0x000007e0, /* dst_mask */ | |
173 | false), /* pcrel_offset */ | |
174 | ||
175 | HOWTO (R_ARM_THM_PC22, /* type */ | |
176 | 1, /* rightshift */ | |
177 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
178 | 23, /* bitsize */ | |
179 | true, /* pc_relative */ | |
180 | 0, /* bitpos */ | |
181 | complain_overflow_signed, /* complain_on_overflow */ | |
182 | bfd_elf_generic_reloc, /* special_function */ | |
183 | "R_ARM_THM_PC22", /* name */ | |
184 | false, /* partial_inplace */ | |
185 | 0x07ff07ff, /* src_mask */ | |
186 | 0x07ff07ff, /* dst_mask */ | |
187 | true), /* pcrel_offset */ | |
188 | ||
189 | HOWTO (R_ARM_SBREL32, /* type */ | |
190 | 0, /* rightshift */ | |
191 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
192 | 0, /* bitsize */ | |
193 | false, /* pc_relative */ | |
194 | 0, /* bitpos */ | |
195 | complain_overflow_dont,/* complain_on_overflow */ | |
196 | bfd_elf_generic_reloc, /* special_function */ | |
197 | "R_ARM_SBREL32", /* name */ | |
198 | false, /* partial_inplace */ | |
199 | 0, /* src_mask */ | |
200 | 0, /* dst_mask */ | |
201 | false), /* pcrel_offset */ | |
202 | ||
203 | HOWTO (R_ARM_AMP_VCALL9, /* type */ | |
204 | 1, /* rightshift */ | |
205 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
206 | 8, /* bitsize */ | |
207 | true, /* pc_relative */ | |
208 | 0, /* bitpos */ | |
209 | complain_overflow_signed, /* complain_on_overflow */ | |
210 | bfd_elf_generic_reloc, /* special_function */ | |
211 | "R_ARM_AMP_VCALL9", /* name */ | |
212 | false, /* partial_inplace */ | |
213 | 0x000000ff, /* src_mask */ | |
214 | 0x000000ff, /* dst_mask */ | |
215 | true), /* pcrel_offset */ | |
216 | ||
217 | /* 12 bit pc relative. */ | |
218 | HOWTO (R_ARM_THM_PC11, /* type */ | |
219 | 1, /* rightshift */ | |
220 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
221 | 11, /* bitsize */ | |
222 | true, /* pc_relative */ | |
223 | 0, /* bitpos */ | |
224 | complain_overflow_signed, /* complain_on_overflow */ | |
225 | bfd_elf_generic_reloc, /* special_function */ | |
226 | "R_ARM_THM_PC11", /* name */ | |
227 | false, /* partial_inplace */ | |
228 | 0x000007ff, /* src_mask */ | |
229 | 0x000007ff, /* dst_mask */ | |
230 | true), /* pcrel_offset */ | |
231 | ||
232 | /* 12 bit pc relative. */ | |
233 | HOWTO (R_ARM_THM_PC9, /* type */ | |
234 | 1, /* rightshift */ | |
235 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
236 | 8, /* bitsize */ | |
237 | true, /* pc_relative */ | |
238 | 0, /* bitpos */ | |
239 | complain_overflow_signed, /* complain_on_overflow */ | |
240 | bfd_elf_generic_reloc, /* special_function */ | |
241 | "R_ARM_THM_PC9", /* name */ | |
242 | false, /* partial_inplace */ | |
243 | 0x000000ff, /* src_mask */ | |
244 | 0x000000ff, /* dst_mask */ | |
245 | true), /* pcrel_offset */ | |
246 | ||
247 | /* GNU extension to record C++ vtable hierarchy. */ | |
248 | HOWTO (R_ARM_GNU_VTINHERIT, /* type */ | |
249 | 0, /* rightshift */ | |
250 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
251 | 0, /* bitsize */ | |
252 | false, /* pc_relative */ | |
253 | 0, /* bitpos */ | |
254 | complain_overflow_dont, /* complain_on_overflow */ | |
255 | NULL, /* special_function */ | |
256 | "R_ARM_GNU_VTINHERIT", /* name */ | |
257 | false, /* partial_inplace */ | |
258 | 0, /* src_mask */ | |
259 | 0, /* dst_mask */ | |
260 | false), /* pcrel_offset */ | |
261 | ||
262 | /* GNU extension to record C++ vtable member usage. */ | |
263 | HOWTO (R_ARM_GNU_VTENTRY, /* type */ | |
264 | 0, /* rightshift */ | |
265 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
266 | 0, /* bitsize */ | |
267 | false, /* pc_relative */ | |
268 | 0, /* bitpos */ | |
269 | complain_overflow_dont, /* complain_on_overflow */ | |
270 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
271 | "R_ARM_GNU_VTENTRY", /* name */ | |
272 | false, /* partial_inplace */ | |
273 | 0, /* src_mask */ | |
274 | 0, /* dst_mask */ | |
275 | false), /* pcrel_offset */ | |
276 | ||
277 | /* XXX - gap in index numbering here. */ | |
278 | ||
279 | HOWTO (R_ARM_PLT32, /* type */ | |
280 | 2, /* rightshift */ | |
281 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
282 | 26, /* bitsize */ | |
283 | true, /* pc_relative */ | |
284 | 0, /* bitpos */ | |
285 | complain_overflow_bitfield,/* complain_on_overflow */ | |
286 | bfd_elf_generic_reloc, /* special_function */ | |
287 | "R_ARM_PLT32", /* name */ | |
288 | true, /* partial_inplace */ | |
289 | 0x00ffffff, /* src_mask */ | |
290 | 0x00ffffff, /* dst_mask */ | |
291 | true), /* pcrel_offset */ | |
292 | ||
293 | /* XXX - gap in index numbering here. */ | |
294 | ||
295 | HOWTO (R_ARM_RREL32, /* type */ | |
296 | 0, /* rightshift */ | |
297 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
298 | 0, /* bitsize */ | |
299 | false, /* pc_relative */ | |
300 | 0, /* bitpos */ | |
301 | complain_overflow_dont, /* complain_on_overflow */ | |
302 | bfd_elf_generic_reloc, /* special_function */ | |
303 | "R_ARM_RREL32", /* name */ | |
304 | false, /* partial_inplace */ | |
305 | 0, /* src_mask */ | |
306 | 0, /* dst_mask */ | |
307 | false), /* pcrel_offset */ | |
308 | ||
309 | HOWTO (R_ARM_RABS32, /* type */ | |
310 | 0, /* rightshift */ | |
311 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
312 | 0, /* bitsize */ | |
313 | false, /* pc_relative */ | |
314 | 0, /* bitpos */ | |
315 | complain_overflow_dont, /* complain_on_overflow */ | |
316 | bfd_elf_generic_reloc, /* special_function */ | |
317 | "R_ARM_RABS32", /* name */ | |
318 | false, /* partial_inplace */ | |
319 | 0, /* src_mask */ | |
320 | 0, /* dst_mask */ | |
321 | false), /* pcrel_offset */ | |
322 | ||
323 | HOWTO (R_ARM_RPC24, /* type */ | |
324 | 0, /* rightshift */ | |
325 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
326 | 0, /* bitsize */ | |
327 | false, /* pc_relative */ | |
328 | 0, /* bitpos */ | |
329 | complain_overflow_dont, /* complain_on_overflow */ | |
330 | bfd_elf_generic_reloc, /* special_function */ | |
331 | "R_ARM_RPC24", /* name */ | |
332 | false, /* partial_inplace */ | |
333 | 0, /* src_mask */ | |
334 | 0, /* dst_mask */ | |
335 | false), /* pcrel_offset */ | |
336 | ||
337 | HOWTO (R_ARM_RBASE, /* type */ | |
338 | 0, /* rightshift */ | |
339 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
340 | 0, /* bitsize */ | |
341 | false, /* pc_relative */ | |
342 | 0, /* bitpos */ | |
343 | complain_overflow_dont, /* complain_on_overflow */ | |
344 | bfd_elf_generic_reloc, /* special_function */ | |
345 | "R_ARM_RBASE", /* name */ | |
346 | false, /* partial_inplace */ | |
347 | 0, /* src_mask */ | |
348 | 0, /* dst_mask */ | |
349 | false) /* pcrel_offset */ | |
350 | }; | |
252b5132 | 351 | |
5f97aa0c NC |
352 | /* Locate a reloc in the howto table. This function must be used |
353 | when the entry number is is > R_ARM_GNU_VTINHERIT. */ | |
917583ad | 354 | |
5f97aa0c NC |
355 | static reloc_howto_type * |
356 | find_howto (r_type) | |
357 | unsigned int r_type; | |
358 | { | |
359 | int i; | |
3e932841 | 360 | |
5f97aa0c NC |
361 | for (i = NUM_ELEM (elf32_arm_howto_table); i--;) |
362 | if (elf32_arm_howto_table [i].type == r_type) | |
363 | return elf32_arm_howto_table + i; | |
364 | ||
365 | return NULL; | |
366 | } | |
367 | ||
252b5132 RH |
368 | static void |
369 | elf32_arm_info_to_howto (abfd, bfd_reloc, elf_reloc) | |
5f771d47 | 370 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
371 | arelent *bfd_reloc; |
372 | Elf32_Internal_Rela *elf_reloc; | |
373 | { | |
374 | unsigned int r_type; | |
375 | ||
376 | r_type = ELF32_R_TYPE (elf_reloc->r_info); | |
5f97aa0c NC |
377 | |
378 | if (r_type <= R_ARM_GNU_VTINHERIT) | |
379 | bfd_reloc->howto = & elf32_arm_howto_table[r_type]; | |
380 | else | |
381 | bfd_reloc->howto = find_howto (r_type); | |
252b5132 RH |
382 | } |
383 | ||
384 | struct elf32_arm_reloc_map | |
385 | { | |
386 | bfd_reloc_code_real_type bfd_reloc_val; | |
387 | unsigned char elf_reloc_val; | |
388 | }; | |
389 | ||
390 | static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] = | |
917583ad NC |
391 | { |
392 | {BFD_RELOC_NONE, R_ARM_NONE }, | |
393 | {BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24 }, | |
394 | {BFD_RELOC_32, R_ARM_ABS32 }, | |
395 | {BFD_RELOC_32_PCREL, R_ARM_REL32 }, | |
396 | {BFD_RELOC_8, R_ARM_ABS8 }, | |
397 | {BFD_RELOC_16, R_ARM_ABS16 }, | |
398 | {BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12 }, | |
399 | {BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5 }, | |
400 | {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_PC22 }, | |
401 | {BFD_RELOC_NONE, R_ARM_SBREL32 }, | |
402 | {BFD_RELOC_NONE, R_ARM_AMP_VCALL9 }, | |
403 | {BFD_RELOC_THUMB_PCREL_BRANCH12, R_ARM_THM_PC11 }, | |
404 | {BFD_RELOC_THUMB_PCREL_BRANCH9, R_ARM_THM_PC9 }, | |
405 | {BFD_RELOC_VTABLE_INHERIT, R_ARM_GNU_VTINHERIT }, | |
406 | {BFD_RELOC_VTABLE_ENTRY, R_ARM_GNU_VTENTRY } | |
407 | }; | |
252b5132 RH |
408 | |
409 | static reloc_howto_type * | |
410 | elf32_arm_reloc_type_lookup (abfd, code) | |
5f771d47 | 411 | bfd * abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
412 | bfd_reloc_code_real_type code; |
413 | { | |
414 | unsigned int i; | |
415 | ||
5f97aa0c NC |
416 | for (i = NUM_ELEM (elf32_arm_reloc_map); i--;) |
417 | if (elf32_arm_reloc_map[i].bfd_reloc_val == code) | |
418 | return & elf32_arm_howto_table [elf32_arm_reloc_map[i].elf_reloc_val]; | |
252b5132 | 419 | |
5f97aa0c NC |
420 | if (code == BFD_RELOC_ARM_PLT32) |
421 | return find_howto (R_ARM_PLT32); | |
3e932841 | 422 | |
252b5132 RH |
423 | return NULL; |
424 | } | |
425 | ||
252b5132 | 426 | #include "elf32-arm.h" |