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 #define ARM_ELF_ABI_VERSION 0
41 #define ARM_ELF_OS_ABI_VERSION 0
43 static reloc_howto_type elf32_arm_howto_table
[] =
46 HOWTO (R_ARM_NONE
, /* type */
48 0, /* size (0 = byte, 1 = short, 2 = long) */
50 false, /* pc_relative */
52 complain_overflow_dont
, /* complain_on_overflow */
53 bfd_elf_generic_reloc
, /* special_function */
54 "R_ARM_NONE", /* name */
55 false, /* partial_inplace */
58 false), /* pcrel_offset */
60 HOWTO (R_ARM_PC24
, /* type */
62 2, /* size (0 = byte, 1 = short, 2 = long) */
64 true, /* pc_relative */
66 complain_overflow_signed
, /* complain_on_overflow */
67 bfd_elf_generic_reloc
, /* special_function */
68 "R_ARM_PC24", /* name */
69 false, /* partial_inplace */
70 0x00ffffff, /* src_mask */
71 0x00ffffff, /* dst_mask */
72 true), /* pcrel_offset */
75 HOWTO (R_ARM_ABS32
, /* type */
77 2, /* size (0 = byte, 1 = short, 2 = long) */
79 false, /* pc_relative */
81 complain_overflow_bitfield
, /* complain_on_overflow */
82 bfd_elf_generic_reloc
, /* special_function */
83 "R_ARM_ABS32", /* name */
84 false, /* partial_inplace */
85 0xffffffff, /* src_mask */
86 0xffffffff, /* dst_mask */
87 false), /* pcrel_offset */
89 /* standard 32bit pc-relative reloc */
90 HOWTO (R_ARM_REL32
, /* type */
92 2, /* size (0 = byte, 1 = short, 2 = long) */
94 true, /* pc_relative */
96 complain_overflow_bitfield
, /* complain_on_overflow */
97 bfd_elf_generic_reloc
, /* special_function */
98 "R_ARM_REL32", /* name */
99 false, /* partial_inplace */
100 0xffffffff, /* src_mask */
101 0xffffffff, /* dst_mask */
102 true), /* pcrel_offset */
105 HOWTO (R_ARM_ABS8
, /* type */
107 0, /* size (0 = byte, 1 = short, 2 = long) */
109 false, /* pc_relative */
111 complain_overflow_bitfield
, /* complain_on_overflow */
112 bfd_elf_generic_reloc
, /* special_function */
113 "R_ARM_ABS8", /* name */
114 false, /* partial_inplace */
115 0x000000ff, /* src_mask */
116 0x000000ff, /* dst_mask */
117 false), /* pcrel_offset */
119 /* 16 bit absolute */
120 HOWTO (R_ARM_ABS16
, /* type */
122 1, /* size (0 = byte, 1 = short, 2 = long) */
124 false, /* pc_relative */
126 complain_overflow_bitfield
, /* complain_on_overflow */
127 bfd_elf_generic_reloc
, /* special_function */
128 "R_ARM_ABS16", /* name */
129 false, /* partial_inplace */
132 false), /* pcrel_offset */
134 /* 12 bit absolute */
135 HOWTO (R_ARM_ABS12
, /* type */
137 2, /* size (0 = byte, 1 = short, 2 = long) */
139 false, /* pc_relative */
141 complain_overflow_bitfield
, /* complain_on_overflow */
142 bfd_elf_generic_reloc
, /* special_function */
143 "R_ARM_ABS12", /* name */
144 false, /* partial_inplace */
145 0x000008ff, /* src_mask */
146 0x000008ff, /* dst_mask */
147 false), /* pcrel_offset */
149 HOWTO (R_ARM_THM_ABS5
, /* type */
151 1, /* size (0 = byte, 1 = short, 2 = long) */
153 false, /* pc_relative */
155 complain_overflow_bitfield
, /* complain_on_overflow */
156 bfd_elf_generic_reloc
, /* special_function */
157 "R_ARM_THM_ABS5", /* name */
158 false, /* partial_inplace */
159 0x000007e0, /* src_mask */
160 0x000007e0, /* dst_mask */
161 false), /* pcrel_offset */
163 HOWTO (R_ARM_THM_PC22
, /* type */
165 2, /* size (0 = byte, 1 = short, 2 = long) */
167 true, /* pc_relative */
169 complain_overflow_signed
, /* complain_on_overflow */
170 bfd_elf_generic_reloc
, /* special_function */
171 "R_ARM_THM_PC22", /* name */
172 false, /* partial_inplace */
173 0x07ff07ff, /* src_mask */
174 0x07ff07ff, /* dst_mask */
175 true), /* pcrel_offset */
177 HOWTO (R_ARM_SBREL32
, /* type */
179 0, /* size (0 = byte, 1 = short, 2 = long) */
181 false, /* pc_relative */
183 complain_overflow_dont
,/* complain_on_overflow */
184 bfd_elf_generic_reloc
, /* special_function */
185 "R_ARM_SBREL32", /* name */
186 false, /* partial_inplace */
189 false), /* pcrel_offset */
191 HOWTO (R_ARM_AMP_VCALL9
, /* type */
193 1, /* size (0 = byte, 1 = short, 2 = long) */
195 true, /* pc_relative */
197 complain_overflow_signed
, /* complain_on_overflow */
198 bfd_elf_generic_reloc
, /* special_function */
199 "R_ARM_AMP_VCALL9", /* name */
200 false, /* partial_inplace */
201 0x000000ff, /* src_mask */
202 0x000000ff, /* dst_mask */
203 true), /* pcrel_offset */
205 /* 12 bit pc relative */
206 HOWTO (R_ARM_THM_PC11
, /* type */
208 1, /* size (0 = byte, 1 = short, 2 = long) */
210 true, /* pc_relative */
212 complain_overflow_signed
, /* complain_on_overflow */
213 bfd_elf_generic_reloc
, /* special_function */
214 "R_ARM_THM_PC11", /* name */
215 false, /* partial_inplace */
216 0x000007ff, /* src_mask */
217 0x000007ff, /* dst_mask */
218 true), /* pcrel_offset */
220 /* 12 bit pc relative */
221 HOWTO (R_ARM_THM_PC9
, /* type */
223 1, /* size (0 = byte, 1 = short, 2 = long) */
225 true, /* pc_relative */
227 complain_overflow_signed
, /* complain_on_overflow */
228 bfd_elf_generic_reloc
, /* special_function */
229 "R_ARM_THM_PC9", /* name */
230 false, /* partial_inplace */
231 0x000000ff, /* src_mask */
232 0x000000ff, /* dst_mask */
233 true), /* pcrel_offset */
235 /* GNU extension to record C++ vtable hierarchy */
236 HOWTO (R_ARM_GNU_VTINHERIT
, /* type */
238 2, /* size (0 = byte, 1 = short, 2 = long) */
240 false, /* pc_relative */
242 complain_overflow_dont
, /* complain_on_overflow */
243 NULL
, /* special_function */
244 "R_ARM_GNU_VTINHERIT", /* name */
245 false, /* partial_inplace */
248 false), /* pcrel_offset */
250 /* GNU extension to record C++ vtable member usage */
251 HOWTO (R_ARM_GNU_VTENTRY
, /* type */
253 2, /* size (0 = byte, 1 = short, 2 = long) */
255 false, /* pc_relative */
257 complain_overflow_dont
, /* complain_on_overflow */
258 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
259 "R_ARM_GNU_VTENTRY", /* name */
260 false, /* partial_inplace */
263 false), /* pcrel_offset */
265 /* XXX - gap in index numbering here. */
267 HOWTO (R_ARM_PLT32
, /* type */
269 2, /* size (0 = byte, 1 = short, 2 = long) */
271 true, /* pc_relative */
273 complain_overflow_bitfield
,/* complain_on_overflow */
274 bfd_elf_generic_reloc
, /* special_function */
275 "R_ARM_PLT32", /* name */
276 true, /* partial_inplace */
277 0x00ffffff, /* src_mask */
278 0x00ffffff, /* dst_mask */
279 true), /* pcrel_offset */
281 /* XXX - gap in index numbering here. */
283 HOWTO (R_ARM_RREL32
, /* type */
285 0, /* size (0 = byte, 1 = short, 2 = long) */
287 false, /* pc_relative */
289 complain_overflow_dont
, /* complain_on_overflow */
290 bfd_elf_generic_reloc
, /* special_function */
291 "R_ARM_RREL32", /* name */
292 false, /* partial_inplace */
295 false), /* pcrel_offset */
297 HOWTO (R_ARM_RABS32
, /* type */
299 0, /* size (0 = byte, 1 = short, 2 = long) */
301 false, /* pc_relative */
303 complain_overflow_dont
, /* complain_on_overflow */
304 bfd_elf_generic_reloc
, /* special_function */
305 "R_ARM_RABS32", /* name */
306 false, /* partial_inplace */
309 false), /* pcrel_offset */
311 HOWTO (R_ARM_RPC24
, /* type */
313 0, /* size (0 = byte, 1 = short, 2 = long) */
315 false, /* pc_relative */
317 complain_overflow_dont
, /* complain_on_overflow */
318 bfd_elf_generic_reloc
, /* special_function */
319 "R_ARM_RPC24", /* name */
320 false, /* partial_inplace */
323 false), /* pcrel_offset */
325 HOWTO (R_ARM_RBASE
, /* type */
327 0, /* size (0 = byte, 1 = short, 2 = long) */
329 false, /* pc_relative */
331 complain_overflow_dont
, /* complain_on_overflow */
332 bfd_elf_generic_reloc
, /* special_function */
333 "R_ARM_RBASE", /* name */
334 false, /* partial_inplace */
337 false) /* pcrel_offset */
340 /* Locate a reloc in the howto table. This function must be used
341 when the entry number is is > R_ARM_GNU_VTINHERIT. */
342 static reloc_howto_type
*
348 for (i
= NUM_ELEM (elf32_arm_howto_table
); i
--;)
349 if (elf32_arm_howto_table
[i
].type
== r_type
)
350 return elf32_arm_howto_table
+ i
;
356 elf32_arm_info_to_howto (abfd
, bfd_reloc
, elf_reloc
)
357 bfd
*abfd ATTRIBUTE_UNUSED
;
359 Elf32_Internal_Rela
*elf_reloc
;
363 r_type
= ELF32_R_TYPE (elf_reloc
->r_info
);
365 if (r_type
<= R_ARM_GNU_VTINHERIT
)
366 bfd_reloc
->howto
= & elf32_arm_howto_table
[r_type
];
368 bfd_reloc
->howto
= find_howto (r_type
);
371 struct elf32_arm_reloc_map
373 bfd_reloc_code_real_type bfd_reloc_val
;
374 unsigned char elf_reloc_val
;
377 static const struct elf32_arm_reloc_map elf32_arm_reloc_map
[] =
379 {BFD_RELOC_NONE
, R_ARM_NONE
},
380 {BFD_RELOC_ARM_PCREL_BRANCH
, R_ARM_PC24
},
381 {BFD_RELOC_32
, R_ARM_ABS32
},
382 {BFD_RELOC_32_PCREL
, R_ARM_REL32
},
383 {BFD_RELOC_8
, R_ARM_ABS8
},
384 {BFD_RELOC_16
, R_ARM_ABS16
},
385 {BFD_RELOC_ARM_OFFSET_IMM
, R_ARM_ABS12
},
386 {BFD_RELOC_ARM_THUMB_OFFSET
, R_ARM_THM_ABS5
},
387 {BFD_RELOC_THUMB_PCREL_BRANCH23
, R_ARM_THM_PC22
},
388 {BFD_RELOC_NONE
, R_ARM_SBREL32
},
389 {BFD_RELOC_NONE
, R_ARM_AMP_VCALL9
},
390 {BFD_RELOC_THUMB_PCREL_BRANCH12
, R_ARM_THM_PC11
},
391 {BFD_RELOC_THUMB_PCREL_BRANCH9
, R_ARM_THM_PC9
},
392 {BFD_RELOC_VTABLE_INHERIT
, R_ARM_GNU_VTINHERIT
},
393 {BFD_RELOC_VTABLE_ENTRY
, R_ARM_GNU_VTENTRY
}
396 static reloc_howto_type
*
397 elf32_arm_reloc_type_lookup (abfd
, code
)
398 bfd
* abfd ATTRIBUTE_UNUSED
;
399 bfd_reloc_code_real_type code
;
403 for (i
= NUM_ELEM (elf32_arm_reloc_map
); i
--;)
404 if (elf32_arm_reloc_map
[i
].bfd_reloc_val
== code
)
405 return & elf32_arm_howto_table
[elf32_arm_reloc_map
[i
].elf_reloc_val
];
407 if (code
== BFD_RELOC_ARM_PLT32
)
408 return find_howto (R_ARM_PLT32
);
413 #define bfd_elf32_arm_allocate_interworking_sections \
414 bfd_elf32_arm_oabi_allocate_interworking_sections
415 #define bfd_elf32_arm_get_bfd_for_interworking \
416 bfd_elf32_arm_oabi_get_bfd_for_interworking
417 #define bfd_elf32_arm_process_before_allocation \
418 bfd_elf32_arm_oabi_process_before_allocation
420 #include "elf32-arm.h"