1 /* 32-bit ELF support for ARM old abi option.
2 Copyright 1999 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
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.
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.
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. */
20 #include "elf/arm-oabi.h"
27 #define NUM_ELEM(a) (sizeof (a) / sizeof (a)[0])
32 #define TARGET_LITTLE_SYM bfd_elf32_littlearm_oabi_vec
33 #define TARGET_LITTLE_NAME "elf32-littlearm-oabi"
34 #define TARGET_BIG_SYM bfd_elf32_bigarm_oabi_vec
35 #define TARGET_BIG_NAME "elf32-bigarm-oabi"
37 #define elf_info_to_howto elf32_arm_info_to_howto
38 #define elf_info_to_howto_rel 0
40 static reloc_howto_type elf32_arm_howto_table
[] =
43 HOWTO (R_ARM_NONE
, /* type */
45 0, /* size (0 = byte, 1 = short, 2 = long) */
47 false, /* pc_relative */
49 complain_overflow_dont
, /* complain_on_overflow */
50 bfd_elf_generic_reloc
, /* special_function */
51 "R_ARM_NONE", /* name */
52 false, /* partial_inplace */
55 false), /* pcrel_offset */
57 HOWTO (R_ARM_PC24
, /* type */
59 2, /* size (0 = byte, 1 = short, 2 = long) */
61 true, /* pc_relative */
63 complain_overflow_signed
, /* complain_on_overflow */
64 bfd_elf_generic_reloc
, /* special_function */
65 "R_ARM_PC24", /* name */
66 false, /* partial_inplace */
67 0x00ffffff, /* src_mask */
68 0x00ffffff, /* dst_mask */
69 true), /* pcrel_offset */
72 HOWTO (R_ARM_ABS32
, /* type */
74 2, /* size (0 = byte, 1 = short, 2 = long) */
76 false, /* pc_relative */
78 complain_overflow_bitfield
, /* complain_on_overflow */
79 bfd_elf_generic_reloc
, /* special_function */
80 "R_ARM_ABS32", /* name */
81 false, /* partial_inplace */
82 0xffffffff, /* src_mask */
83 0xffffffff, /* dst_mask */
84 false), /* pcrel_offset */
86 /* standard 32bit pc-relative reloc */
87 HOWTO (R_ARM_REL32
, /* type */
89 2, /* size (0 = byte, 1 = short, 2 = long) */
91 true, /* pc_relative */
93 complain_overflow_bitfield
, /* complain_on_overflow */
94 bfd_elf_generic_reloc
, /* special_function */
95 "R_ARM_REL32", /* name */
96 false, /* partial_inplace */
97 0xffffffff, /* src_mask */
98 0xffffffff, /* dst_mask */
99 true), /* pcrel_offset */
102 HOWTO (R_ARM_ABS8
, /* type */
104 0, /* size (0 = byte, 1 = short, 2 = long) */
106 false, /* pc_relative */
108 complain_overflow_bitfield
, /* complain_on_overflow */
109 bfd_elf_generic_reloc
, /* special_function */
110 "R_ARM_ABS8", /* name */
111 false, /* partial_inplace */
112 0x000000ff, /* src_mask */
113 0x000000ff, /* dst_mask */
114 false), /* pcrel_offset */
116 /* 16 bit absolute */
117 HOWTO (R_ARM_ABS16
, /* type */
119 1, /* size (0 = byte, 1 = short, 2 = long) */
121 false, /* pc_relative */
123 complain_overflow_bitfield
, /* complain_on_overflow */
124 bfd_elf_generic_reloc
, /* special_function */
125 "R_ARM_ABS16", /* name */
126 false, /* partial_inplace */
129 false), /* pcrel_offset */
131 /* 12 bit absolute */
132 HOWTO (R_ARM_ABS12
, /* type */
134 2, /* size (0 = byte, 1 = short, 2 = long) */
136 false, /* pc_relative */
138 complain_overflow_bitfield
, /* complain_on_overflow */
139 bfd_elf_generic_reloc
, /* special_function */
140 "R_ARM_ABS12", /* name */
141 false, /* partial_inplace */
142 0x000008ff, /* src_mask */
143 0x000008ff, /* dst_mask */
144 false), /* pcrel_offset */
146 HOWTO (R_ARM_THM_ABS5
, /* type */
148 1, /* size (0 = byte, 1 = short, 2 = long) */
150 false, /* pc_relative */
152 complain_overflow_bitfield
, /* complain_on_overflow */
153 bfd_elf_generic_reloc
, /* special_function */
154 "R_ARM_THM_ABS5", /* name */
155 false, /* partial_inplace */
156 0x000007e0, /* src_mask */
157 0x000007e0, /* dst_mask */
158 false), /* pcrel_offset */
160 HOWTO (R_ARM_THM_PC22
, /* type */
162 2, /* size (0 = byte, 1 = short, 2 = long) */
164 true, /* pc_relative */
166 complain_overflow_signed
, /* complain_on_overflow */
167 bfd_elf_generic_reloc
, /* special_function */
168 "R_ARM_THM_PC22", /* name */
169 false, /* partial_inplace */
170 0x07ff07ff, /* src_mask */
171 0x07ff07ff, /* dst_mask */
172 true), /* pcrel_offset */
174 HOWTO (R_ARM_SBREL32
, /* type */
176 0, /* size (0 = byte, 1 = short, 2 = long) */
178 false, /* pc_relative */
180 complain_overflow_dont
, /* complain_on_overflow */
181 bfd_elf_generic_reloc
, /* special_function */
182 "R_ARM_SBREL32", /* name */
183 false, /* partial_inplace */
186 false), /* pcrel_offset */
188 HOWTO (R_ARM_AMP_VCALL9
, /* type */
190 1, /* size (0 = byte, 1 = short, 2 = long) */
192 true, /* pc_relative */
194 complain_overflow_signed
, /* complain_on_overflow */
195 bfd_elf_generic_reloc
, /* special_function */
196 "R_ARM_AMP_VCALL9", /* name */
197 false, /* partial_inplace */
198 0x000000ff, /* src_mask */
199 0x000000ff, /* dst_mask */
200 true), /* pcrel_offset */
202 /* 12 bit pc relative */
203 HOWTO (R_ARM_THM_PC11
, /* type */
205 1, /* size (0 = byte, 1 = short, 2 = long) */
207 true, /* pc_relative */
209 complain_overflow_signed
, /* complain_on_overflow */
210 bfd_elf_generic_reloc
, /* special_function */
211 "R_ARM_THM_PC11", /* name */
212 false, /* partial_inplace */
213 0x000007ff, /* src_mask */
214 0x000007ff, /* dst_mask */
215 true), /* pcrel_offset */
217 /* 12 bit pc relative */
218 HOWTO (R_ARM_THM_PC9
, /* type */
220 1, /* size (0 = byte, 1 = short, 2 = long) */
222 true, /* pc_relative */
224 complain_overflow_signed
, /* complain_on_overflow */
225 bfd_elf_generic_reloc
, /* special_function */
226 "R_ARM_THM_PC9", /* name */
227 false, /* partial_inplace */
228 0x000000ff, /* src_mask */
229 0x000000ff, /* dst_mask */
230 true), /* pcrel_offset */
232 /* GNU extension to record C++ vtable hierarchy */
233 HOWTO (R_ARM_GNU_VTINHERIT
, /* type */
235 2, /* size (0 = byte, 1 = short, 2 = long) */
237 false, /* pc_relative */
239 complain_overflow_dont
, /* complain_on_overflow */
240 NULL
, /* special_function */
241 "R_ARM_GNU_VTINHERIT", /* name */
242 false, /* partial_inplace */
245 false), /* pcrel_offset */
247 /* GNU extension to record C++ vtable member usage */
248 HOWTO (R_ARM_GNU_VTENTRY
, /* type */
250 2, /* size (0 = byte, 1 = short, 2 = long) */
252 false, /* pc_relative */
254 complain_overflow_dont
, /* complain_on_overflow */
255 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
256 "R_ARM_GNU_VTENTRY", /* name */
257 false, /* partial_inplace */
260 false), /* pcrel_offset */
262 /* XXX - gap in index numbering here. */
264 HOWTO (R_ARM_PLT32
, /* type */
266 2, /* size (0 = byte, 1 = short, 2 = long) */
268 true, /* pc_relative */
270 complain_overflow_bitfield
,/* complain_on_overflow */
271 bfd_elf_generic_reloc
, /* special_function */
272 "R_ARM_PLT32", /* name */
273 true, /* partial_inplace */
274 0x00ffffff, /* src_mask */
275 0x00ffffff, /* dst_mask */
276 true), /* pcrel_offset */
278 /* XXX - gap in index numbering here. */
280 HOWTO (R_ARM_RREL32
, /* type */
282 0, /* size (0 = byte, 1 = short, 2 = long) */
284 false, /* pc_relative */
286 complain_overflow_dont
, /* complain_on_overflow */
287 bfd_elf_generic_reloc
, /* special_function */
288 "R_ARM_RREL32", /* name */
289 false, /* partial_inplace */
292 false), /* pcrel_offset */
294 HOWTO (R_ARM_RABS32
, /* type */
296 0, /* size (0 = byte, 1 = short, 2 = long) */
298 false, /* pc_relative */
300 complain_overflow_dont
, /* complain_on_overflow */
301 bfd_elf_generic_reloc
, /* special_function */
302 "R_ARM_RABS32", /* name */
303 false, /* partial_inplace */
306 false), /* pcrel_offset */
308 HOWTO (R_ARM_RPC24
, /* type */
310 0, /* size (0 = byte, 1 = short, 2 = long) */
312 false, /* pc_relative */
314 complain_overflow_dont
, /* complain_on_overflow */
315 bfd_elf_generic_reloc
, /* special_function */
316 "R_ARM_RPC24", /* name */
317 false, /* partial_inplace */
320 false), /* pcrel_offset */
322 HOWTO (R_ARM_RBASE
, /* type */
324 0, /* size (0 = byte, 1 = short, 2 = long) */
326 false, /* pc_relative */
328 complain_overflow_dont
, /* complain_on_overflow */
329 bfd_elf_generic_reloc
, /* special_function */
330 "R_ARM_RBASE", /* name */
331 false, /* partial_inplace */
334 false) /* pcrel_offset */
337 /* Locate a reloc in the howto table. This function must be used
338 when the entry number is is > R_ARM_GNU_VTINHERIT. */
339 static reloc_howto_type
*
345 for (i
= NUM_ELEM (elf32_arm_howto_table
); i
--;)
346 if (elf32_arm_howto_table
[i
].type
== r_type
)
347 return elf32_arm_howto_table
+ i
;
353 elf32_arm_info_to_howto (abfd
, bfd_reloc
, elf_reloc
)
356 Elf32_Internal_Rela
*elf_reloc
;
360 r_type
= ELF32_R_TYPE (elf_reloc
->r_info
);
362 if (r_type
<= R_ARM_GNU_VTINHERIT
)
363 bfd_reloc
->howto
= & elf32_arm_howto_table
[r_type
];
365 bfd_reloc
->howto
= find_howto (r_type
);
368 struct elf32_arm_reloc_map
370 bfd_reloc_code_real_type bfd_reloc_val
;
371 unsigned char elf_reloc_val
;
374 static const struct elf32_arm_reloc_map elf32_arm_reloc_map
[] =
376 {BFD_RELOC_NONE
, R_ARM_NONE
,},
377 {BFD_RELOC_ARM_PCREL_BRANCH
, R_ARM_PC24
,},
378 {BFD_RELOC_32
, R_ARM_ABS32
,},
379 {BFD_RELOC_32_PCREL
, R_ARM_REL32
,},
380 {BFD_RELOC_8
, R_ARM_ABS8
,},
381 {BFD_RELOC_16
, R_ARM_ABS16
,},
382 {BFD_RELOC_ARM_OFFSET_IMM
, R_ARM_ABS12
,},
383 {BFD_RELOC_ARM_THUMB_OFFSET
, R_ARM_THM_ABS5
,},
384 {BFD_RELOC_THUMB_PCREL_BRANCH23
, R_ARM_THM_PC22
,},
385 {BFD_RELOC_NONE
, R_ARM_SBREL32
,},
386 {BFD_RELOC_NONE
, R_ARM_AMP_VCALL9
,},
387 {BFD_RELOC_THUMB_PCREL_BRANCH12
, R_ARM_THM_PC11
,},
388 {BFD_RELOC_THUMB_PCREL_BRANCH9
, R_ARM_THM_PC9
,},
389 {BFD_RELOC_VTABLE_INHERIT
, R_ARM_GNU_VTINHERIT
},
390 {BFD_RELOC_VTABLE_ENTRY
, R_ARM_GNU_VTENTRY
}
393 static reloc_howto_type
*
394 elf32_arm_reloc_type_lookup (abfd
, code
)
396 bfd_reloc_code_real_type code
;
400 for (i
= NUM_ELEM (elf32_arm_reloc_map
); i
--;)
401 if (elf32_arm_reloc_map
[i
].bfd_reloc_val
== code
)
402 return & elf32_arm_howto_table
[elf32_arm_reloc_map
[i
].elf_reloc_val
];
404 if (code
== BFD_RELOC_ARM_PLT32
)
405 return find_howto (R_ARM_PLT32
);
410 #define bfd_elf32_arm_allocate_interworking_sections \
411 bfd_elf32_arm_oabi_allocate_interworking_sections
412 #define bfd_elf32_arm_get_bfd_for_interworking \
413 bfd_elf32_arm_oabi_get_bfd_for_interworking
414 #define bfd_elf32_arm_process_before_allocation \
415 bfd_elf32_arm_oabi_process_before_allocation
417 #include "elf32-arm.h"