source: trunk/src/binutils/bfd/elfarm-oabi.c@ 108

Last change on this file since 108 was 10, checked in by bird, 23 years ago

Initial revision
  • Property cvs2svn:cvs-rev set to 1.1
  • Property svn:eol-style set to native
  • Property svn:executable set to *
File size: 13.4 KB
Line 
1/* 32-bit ELF support for ARM old abi option.
2 Copyright 1999, 2000, 2001 Free Software Foundation, Inc.
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
20#define OLD_ARM_ABI
21
22#include "elf/arm.h"
23#include "bfd.h"
24#include "sysdep.h"
25#include "libbfd.h"
26#include "elf-bfd.h"
27
28#ifndef NUM_ELEM
29#define NUM_ELEM(a) (sizeof (a) / sizeof (a)[0])
30#endif
31
32#define USE_RELA
33
34#define TARGET_LITTLE_SYM bfd_elf32_littlearm_oabi_vec
35#define TARGET_LITTLE_NAME "elf32-littlearm-oabi"
36#define TARGET_BIG_SYM bfd_elf32_bigarm_oabi_vec
37#define TARGET_BIG_NAME "elf32-bigarm-oabi"
38
39#define elf_info_to_howto elf32_arm_info_to_howto
40#define elf_info_to_howto_rel 0
41
42#define ARM_ELF_ABI_VERSION 0
43#define ARM_ELF_OS_ABI_VERSION 0
44
45static reloc_howto_type elf32_arm_howto_table[] =
46{
47 /* No relocation */
48 HOWTO (R_ARM_NONE, /* type */
49 0, /* rightshift */
50 0, /* size (0 = byte, 1 = short, 2 = long) */
51 0, /* bitsize */
52 false, /* pc_relative */
53 0, /* bitpos */
54 complain_overflow_dont, /* complain_on_overflow */
55 bfd_elf_generic_reloc, /* special_function */
56 "R_ARM_NONE", /* name */
57 false, /* partial_inplace */
58 0, /* src_mask */
59 0, /* dst_mask */
60 false), /* pcrel_offset */
61
62 HOWTO (R_ARM_PC24, /* type */
63 2, /* rightshift */
64 2, /* size (0 = byte, 1 = short, 2 = long) */
65 24, /* bitsize */
66 true, /* pc_relative */
67 0, /* bitpos */
68 complain_overflow_signed, /* complain_on_overflow */
69 bfd_elf_generic_reloc, /* special_function */
70 "R_ARM_PC24", /* name */
71 false, /* partial_inplace */
72 0x00ffffff, /* src_mask */
73 0x00ffffff, /* dst_mask */
74 true), /* pcrel_offset */
75
76 /* 32 bit absolute */
77 HOWTO (R_ARM_ABS32, /* type */
78 0, /* rightshift */
79 2, /* size (0 = byte, 1 = short, 2 = long) */
80 32, /* bitsize */
81 false, /* pc_relative */
82 0, /* bitpos */
83 complain_overflow_bitfield, /* complain_on_overflow */
84 bfd_elf_generic_reloc, /* special_function */
85 "R_ARM_ABS32", /* name */
86 false, /* partial_inplace */
87 0xffffffff, /* src_mask */
88 0xffffffff, /* dst_mask */
89 false), /* pcrel_offset */
90
91 /* standard 32bit pc-relative reloc */
92 HOWTO (R_ARM_REL32, /* type */
93 0, /* rightshift */
94 2, /* size (0 = byte, 1 = short, 2 = long) */
95 32, /* bitsize */
96 true, /* pc_relative */
97 0, /* bitpos */
98 complain_overflow_bitfield, /* complain_on_overflow */
99 bfd_elf_generic_reloc, /* special_function */
100 "R_ARM_REL32", /* name */
101 false, /* partial_inplace */
102 0xffffffff, /* src_mask */
103 0xffffffff, /* dst_mask */
104 true), /* pcrel_offset */
105
106 /* 8 bit absolute */
107 HOWTO (R_ARM_ABS8, /* type */
108 0, /* rightshift */
109 0, /* size (0 = byte, 1 = short, 2 = long) */
110 8, /* bitsize */
111 false, /* pc_relative */
112 0, /* bitpos */
113 complain_overflow_bitfield, /* complain_on_overflow */
114 bfd_elf_generic_reloc, /* special_function */
115 "R_ARM_ABS8", /* name */
116 false, /* partial_inplace */
117 0x000000ff, /* src_mask */
118 0x000000ff, /* dst_mask */
119 false), /* pcrel_offset */
120
121 /* 16 bit absolute */
122 HOWTO (R_ARM_ABS16, /* type */
123 0, /* rightshift */
124 1, /* size (0 = byte, 1 = short, 2 = long) */
125 16, /* bitsize */
126 false, /* pc_relative */
127 0, /* bitpos */
128 complain_overflow_bitfield, /* complain_on_overflow */
129 bfd_elf_generic_reloc, /* special_function */
130 "R_ARM_ABS16", /* name */
131 false, /* partial_inplace */
132 0, /* src_mask */
133 0, /* dst_mask */
134 false), /* pcrel_offset */
135
136 /* 12 bit absolute */
137 HOWTO (R_ARM_ABS12, /* type */
138 0, /* rightshift */
139 2, /* size (0 = byte, 1 = short, 2 = long) */
140 12, /* bitsize */
141 false, /* pc_relative */
142 0, /* bitpos */
143 complain_overflow_bitfield, /* complain_on_overflow */
144 bfd_elf_generic_reloc, /* special_function */
145 "R_ARM_ABS12", /* name */
146 false, /* partial_inplace */
147 0x000008ff, /* src_mask */
148 0x000008ff, /* dst_mask */
149 false), /* pcrel_offset */
150
151 HOWTO (R_ARM_THM_ABS5, /* type */
152 6, /* rightshift */
153 1, /* size (0 = byte, 1 = short, 2 = long) */
154 5, /* bitsize */
155 false, /* pc_relative */
156 0, /* bitpos */
157 complain_overflow_bitfield, /* complain_on_overflow */
158 bfd_elf_generic_reloc, /* special_function */
159 "R_ARM_THM_ABS5", /* name */
160 false, /* partial_inplace */
161 0x000007e0, /* src_mask */
162 0x000007e0, /* dst_mask */
163 false), /* pcrel_offset */
164
165 HOWTO (R_ARM_THM_PC22, /* type */
166 1, /* rightshift */
167 2, /* size (0 = byte, 1 = short, 2 = long) */
168 23, /* bitsize */
169 true, /* pc_relative */
170 0, /* bitpos */
171 complain_overflow_signed, /* complain_on_overflow */
172 bfd_elf_generic_reloc, /* special_function */
173 "R_ARM_THM_PC22", /* name */
174 false, /* partial_inplace */
175 0x07ff07ff, /* src_mask */
176 0x07ff07ff, /* dst_mask */
177 true), /* pcrel_offset */
178
179 HOWTO (R_ARM_SBREL32, /* type */
180 0, /* rightshift */
181 0, /* size (0 = byte, 1 = short, 2 = long) */
182 0, /* bitsize */
183 false, /* pc_relative */
184 0, /* bitpos */
185 complain_overflow_dont,/* complain_on_overflow */
186 bfd_elf_generic_reloc, /* special_function */
187 "R_ARM_SBREL32", /* name */
188 false, /* partial_inplace */
189 0, /* src_mask */
190 0, /* dst_mask */
191 false), /* pcrel_offset */
192
193 HOWTO (R_ARM_AMP_VCALL9, /* type */
194 1, /* rightshift */
195 1, /* size (0 = byte, 1 = short, 2 = long) */
196 8, /* bitsize */
197 true, /* pc_relative */
198 0, /* bitpos */
199 complain_overflow_signed, /* complain_on_overflow */
200 bfd_elf_generic_reloc, /* special_function */
201 "R_ARM_AMP_VCALL9", /* name */
202 false, /* partial_inplace */
203 0x000000ff, /* src_mask */
204 0x000000ff, /* dst_mask */
205 true), /* pcrel_offset */
206
207 /* 12 bit pc relative */
208 HOWTO (R_ARM_THM_PC11, /* type */
209 1, /* rightshift */
210 1, /* size (0 = byte, 1 = short, 2 = long) */
211 11, /* bitsize */
212 true, /* pc_relative */
213 0, /* bitpos */
214 complain_overflow_signed, /* complain_on_overflow */
215 bfd_elf_generic_reloc, /* special_function */
216 "R_ARM_THM_PC11", /* name */
217 false, /* partial_inplace */
218 0x000007ff, /* src_mask */
219 0x000007ff, /* dst_mask */
220 true), /* pcrel_offset */
221
222 /* 12 bit pc relative */
223 HOWTO (R_ARM_THM_PC9, /* type */
224 1, /* rightshift */
225 1, /* size (0 = byte, 1 = short, 2 = long) */
226 8, /* bitsize */
227 true, /* pc_relative */
228 0, /* bitpos */
229 complain_overflow_signed, /* complain_on_overflow */
230 bfd_elf_generic_reloc, /* special_function */
231 "R_ARM_THM_PC9", /* name */
232 false, /* partial_inplace */
233 0x000000ff, /* src_mask */
234 0x000000ff, /* dst_mask */
235 true), /* pcrel_offset */
236
237 /* GNU extension to record C++ vtable hierarchy */
238 HOWTO (R_ARM_GNU_VTINHERIT, /* type */
239 0, /* rightshift */
240 2, /* size (0 = byte, 1 = short, 2 = long) */
241 0, /* bitsize */
242 false, /* pc_relative */
243 0, /* bitpos */
244 complain_overflow_dont, /* complain_on_overflow */
245 NULL, /* special_function */
246 "R_ARM_GNU_VTINHERIT", /* name */
247 false, /* partial_inplace */
248 0, /* src_mask */
249 0, /* dst_mask */
250 false), /* pcrel_offset */
251
252 /* GNU extension to record C++ vtable member usage */
253 HOWTO (R_ARM_GNU_VTENTRY, /* type */
254 0, /* rightshift */
255 2, /* size (0 = byte, 1 = short, 2 = long) */
256 0, /* bitsize */
257 false, /* pc_relative */
258 0, /* bitpos */
259 complain_overflow_dont, /* complain_on_overflow */
260 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
261 "R_ARM_GNU_VTENTRY", /* name */
262 false, /* partial_inplace */
263 0, /* src_mask */
264 0, /* dst_mask */
265 false), /* pcrel_offset */
266
267 /* XXX - gap in index numbering here. */
268
269 HOWTO (R_ARM_PLT32, /* type */
270 2, /* rightshift */
271 2, /* size (0 = byte, 1 = short, 2 = long) */
272 26, /* bitsize */
273 true, /* pc_relative */
274 0, /* bitpos */
275 complain_overflow_bitfield,/* complain_on_overflow */
276 bfd_elf_generic_reloc, /* special_function */
277 "R_ARM_PLT32", /* name */
278 true, /* partial_inplace */
279 0x00ffffff, /* src_mask */
280 0x00ffffff, /* dst_mask */
281 true), /* pcrel_offset */
282
283 /* XXX - gap in index numbering here. */
284
285 HOWTO (R_ARM_RREL32, /* type */
286 0, /* rightshift */
287 0, /* size (0 = byte, 1 = short, 2 = long) */
288 0, /* bitsize */
289 false, /* pc_relative */
290 0, /* bitpos */
291 complain_overflow_dont, /* complain_on_overflow */
292 bfd_elf_generic_reloc, /* special_function */
293 "R_ARM_RREL32", /* name */
294 false, /* partial_inplace */
295 0, /* src_mask */
296 0, /* dst_mask */
297 false), /* pcrel_offset */
298
299 HOWTO (R_ARM_RABS32, /* type */
300 0, /* rightshift */
301 0, /* size (0 = byte, 1 = short, 2 = long) */
302 0, /* bitsize */
303 false, /* pc_relative */
304 0, /* bitpos */
305 complain_overflow_dont, /* complain_on_overflow */
306 bfd_elf_generic_reloc, /* special_function */
307 "R_ARM_RABS32", /* name */
308 false, /* partial_inplace */
309 0, /* src_mask */
310 0, /* dst_mask */
311 false), /* pcrel_offset */
312
313 HOWTO (R_ARM_RPC24, /* type */
314 0, /* rightshift */
315 0, /* size (0 = byte, 1 = short, 2 = long) */
316 0, /* bitsize */
317 false, /* pc_relative */
318 0, /* bitpos */
319 complain_overflow_dont, /* complain_on_overflow */
320 bfd_elf_generic_reloc, /* special_function */
321 "R_ARM_RPC24", /* name */
322 false, /* partial_inplace */
323 0, /* src_mask */
324 0, /* dst_mask */
325 false), /* pcrel_offset */
326
327 HOWTO (R_ARM_RBASE, /* type */
328 0, /* rightshift */
329 0, /* size (0 = byte, 1 = short, 2 = long) */
330 0, /* bitsize */
331 false, /* pc_relative */
332 0, /* bitpos */
333 complain_overflow_dont, /* complain_on_overflow */
334 bfd_elf_generic_reloc, /* special_function */
335 "R_ARM_RBASE", /* name */
336 false, /* partial_inplace */
337 0, /* src_mask */
338 0, /* dst_mask */
339 false) /* pcrel_offset */
340};
341
342/* Locate a reloc in the howto table. This function must be used
343 when the entry number is is > R_ARM_GNU_VTINHERIT. */
344static reloc_howto_type *
345find_howto (r_type)
346 unsigned int r_type;
347{
348 int i;
349
350 for (i = NUM_ELEM (elf32_arm_howto_table); i--;)
351 if (elf32_arm_howto_table [i].type == r_type)
352 return elf32_arm_howto_table + i;
353
354 return NULL;
355}
356
357static void
358elf32_arm_info_to_howto (abfd, bfd_reloc, elf_reloc)
359 bfd *abfd ATTRIBUTE_UNUSED;
360 arelent *bfd_reloc;
361 Elf32_Internal_Rela *elf_reloc;
362{
363 unsigned int r_type;
364
365 r_type = ELF32_R_TYPE (elf_reloc->r_info);
366
367 if (r_type <= R_ARM_GNU_VTINHERIT)
368 bfd_reloc->howto = & elf32_arm_howto_table[r_type];
369 else
370 bfd_reloc->howto = find_howto (r_type);
371}
372
373struct elf32_arm_reloc_map
374 {
375 bfd_reloc_code_real_type bfd_reloc_val;
376 unsigned char elf_reloc_val;
377 };
378
379static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] =
380{
381 {BFD_RELOC_NONE, R_ARM_NONE },
382 {BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24 },
383 {BFD_RELOC_32, R_ARM_ABS32 },
384 {BFD_RELOC_32_PCREL, R_ARM_REL32 },
385 {BFD_RELOC_8, R_ARM_ABS8 },
386 {BFD_RELOC_16, R_ARM_ABS16 },
387 {BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12 },
388 {BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5 },
389 {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_PC22 },
390 {BFD_RELOC_NONE, R_ARM_SBREL32 },
391 {BFD_RELOC_NONE, R_ARM_AMP_VCALL9 },
392 {BFD_RELOC_THUMB_PCREL_BRANCH12, R_ARM_THM_PC11 },
393 {BFD_RELOC_THUMB_PCREL_BRANCH9, R_ARM_THM_PC9 },
394 {BFD_RELOC_VTABLE_INHERIT, R_ARM_GNU_VTINHERIT },
395 {BFD_RELOC_VTABLE_ENTRY, R_ARM_GNU_VTENTRY }
396};
397
398static reloc_howto_type *
399elf32_arm_reloc_type_lookup (abfd, code)
400 bfd * abfd ATTRIBUTE_UNUSED;
401 bfd_reloc_code_real_type code;
402{
403 unsigned int i;
404
405 for (i = NUM_ELEM (elf32_arm_reloc_map); i--;)
406 if (elf32_arm_reloc_map[i].bfd_reloc_val == code)
407 return & elf32_arm_howto_table [elf32_arm_reloc_map[i].elf_reloc_val];
408
409 if (code == BFD_RELOC_ARM_PLT32)
410 return find_howto (R_ARM_PLT32);
411
412 return NULL;
413}
414
415#define bfd_elf32_arm_allocate_interworking_sections \
416 bfd_elf32_arm_oabi_allocate_interworking_sections
417#define bfd_elf32_arm_get_bfd_for_interworking \
418 bfd_elf32_arm_oabi_get_bfd_for_interworking
419#define bfd_elf32_arm_process_before_allocation \
420 bfd_elf32_arm_oabi_process_before_allocation
421
422#include "elf32-arm.h"
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