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/* ARM ELF support for BFD.
2
   Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2009, 2010
3
   Free Software Foundation, Inc.
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 3 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 Foundation,
19
   Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
20
 
21
#ifndef _ELF_ARM_H
22
#define _ELF_ARM_H
23
 
24
#include "elf/reloc-macros.h"
25
 
26
/* Processor specific flags for the ELF header e_flags field.  */
27
#define EF_ARM_RELEXEC     0x01
28
#define EF_ARM_HASENTRY    0x02
29
#define EF_ARM_INTERWORK   0x04
30
#define EF_ARM_APCS_26     0x08
31
#define EF_ARM_APCS_FLOAT  0x10
32
#define EF_ARM_PIC         0x20
33
#define EF_ARM_ALIGN8      0x40         /* 8-bit structure alignment is in use.  */
34
#define EF_ARM_NEW_ABI     0x80
35
#define EF_ARM_OLD_ABI     0x100
36
#define EF_ARM_SOFT_FLOAT  0x200
37
#define EF_ARM_VFP_FLOAT   0x400
38
#define EF_ARM_MAVERICK_FLOAT 0x800
39
 
40
/* Frame unwind information */
41
#define PT_ARM_EXIDX (PT_LOPROC + 1)
42
 
43
/* Other constants defined in the ARM ELF spec. version B-01.  */
44
#define EF_ARM_SYMSARESORTED 0x04       /* NB conflicts with EF_INTERWORK.  */
45
#define EF_ARM_DYNSYMSUSESEGIDX 0x08    /* NB conflicts with EF_APCS26.  */
46
#define EF_ARM_MAPSYMSFIRST 0x10        /* NB conflicts with EF_APCS_FLOAT.  */
47
#define EF_ARM_EABIMASK      0xFF000000
48
 
49
/* Constants defined in AAELF.  */
50
#define EF_ARM_BE8          0x00800000
51
#define EF_ARM_LE8          0x00400000
52
 
53
#define EF_ARM_EABI_VERSION(flags) ((flags) & EF_ARM_EABIMASK)
54
#define EF_ARM_EABI_UNKNOWN  0x00000000
55
#define EF_ARM_EABI_VER1     0x01000000
56
#define EF_ARM_EABI_VER2     0x02000000
57
#define EF_ARM_EABI_VER3     0x03000000
58
#define EF_ARM_EABI_VER4     0x04000000
59
#define EF_ARM_EABI_VER5     0x05000000
60
 
61
/* Local aliases for some flags to match names used by COFF port.  */
62
#define F_INTERWORK        EF_ARM_INTERWORK
63
#define F_APCS26           EF_ARM_APCS_26
64
#define F_APCS_FLOAT       EF_ARM_APCS_FLOAT
65
#define F_PIC              EF_ARM_PIC
66
#define F_SOFT_FLOAT       EF_ARM_SOFT_FLOAT
67
#define F_VFP_FLOAT        EF_ARM_VFP_FLOAT
68
 
69
/* Additional symbol types for Thumb.  */
70
#define STT_ARM_TFUNC      STT_LOPROC   /* A Thumb function.  */
71
#define STT_ARM_16BIT      STT_HIPROC   /* A Thumb label.  */
72
 
73
/* Additional section types.  */
74
#define SHT_ARM_EXIDX          0x70000001       /* Section holds ARM unwind info.  */
75
#define SHT_ARM_PREEMPTMAP     0x70000002       /* Section pre-emption details.  */
76
#define SHT_ARM_ATTRIBUTES     0x70000003       /* Section holds attributes.  */
77
#define SHT_ARM_DEBUGOVERLAY   0x70000004       /* Section holds overlay debug info.  */
78
#define SHT_ARM_OVERLAYSECTION 0x70000005       /* Section holds GDB and overlay integration info.  */
79
 
80
/* ARM-specific values for sh_flags.  */
81
#define SHF_ENTRYSECT      0x10000000   /* Section contains an entry point.  */
82
#define SHF_COMDEF         0x80000000   /* Section may be multiply defined in the input to a link step.  */
83
 
84
/* ARM-specific program header flags.  */
85
#define PF_ARM_SB          0x10000000   /* Segment contains the location addressed by the static base.  */
86
#define PF_ARM_PI          0x20000000   /* Segment is position-independent.  */
87
#define PF_ARM_ABS         0x40000000   /* Segment must be loaded at its base address.  */
88
 
89
/* Values for the Tag_CPU_arch EABI attribute.  */
90
#define TAG_CPU_ARCH_PRE_V4     0
91
#define TAG_CPU_ARCH_V4         1
92
#define TAG_CPU_ARCH_V4T        2
93
#define TAG_CPU_ARCH_V5T        3
94
#define TAG_CPU_ARCH_V5TE       4
95
#define TAG_CPU_ARCH_V5TEJ      5
96
#define TAG_CPU_ARCH_V6         6
97
#define TAG_CPU_ARCH_V6KZ       7
98
#define TAG_CPU_ARCH_V6T2       8
99
#define TAG_CPU_ARCH_V6K        9
100
#define TAG_CPU_ARCH_V7         10
101
#define TAG_CPU_ARCH_V6_M       11
102
#define TAG_CPU_ARCH_V6S_M      12
103
#define TAG_CPU_ARCH_V7E_M      13
104
#define MAX_TAG_CPU_ARCH        13
105
/* Pseudo-architecture to allow objects to be compatible with the subset of
106
   armv4t and armv6-m.  This value should never be stored in object files.  */
107
#define TAG_CPU_ARCH_V4T_PLUS_V6_M (MAX_TAG_CPU_ARCH + 1)
108
 
109
/* Relocation types.  */
110
 
111
START_RELOC_NUMBERS (elf_arm_reloc_type)
112
/* AAELF official names and numbers.  */
113
  RELOC_NUMBER (R_ARM_NONE,               0)
114
  RELOC_NUMBER (R_ARM_PC24,               1)   /* deprecated */
115
  RELOC_NUMBER (R_ARM_ABS32,              2)
116
  RELOC_NUMBER (R_ARM_REL32,              3)
117
  RELOC_NUMBER (R_ARM_LDR_PC_G0,          4)
118
  RELOC_NUMBER (R_ARM_ABS16,              5)
119
  RELOC_NUMBER (R_ARM_ABS12,              6)
120
  RELOC_NUMBER (R_ARM_THM_ABS5,           7)
121
  RELOC_NUMBER (R_ARM_ABS8,               8)
122
  RELOC_NUMBER (R_ARM_SBREL32,            9)
123
  RELOC_NUMBER (R_ARM_THM_CALL,          10)
124
  RELOC_NUMBER (R_ARM_THM_PC8,           11)
125
  RELOC_NUMBER (R_ARM_BREL_ADJ,          12)
126
  RELOC_NUMBER (R_ARM_TLS_DESC,          13)
127
  RELOC_NUMBER (R_ARM_THM_SWI8,          14)   /* obsolete */
128
  RELOC_NUMBER (R_ARM_XPC25,             15)   /* obsolete */
129
  RELOC_NUMBER (R_ARM_THM_XPC22,         16)   /* obsolete */
130
  RELOC_NUMBER (R_ARM_TLS_DTPMOD32,      17)
131
  RELOC_NUMBER (R_ARM_TLS_DTPOFF32,      18)
132
  RELOC_NUMBER (R_ARM_TLS_TPOFF32,       19)
133
  RELOC_NUMBER (R_ARM_COPY,              20)   /* Copy symbol at runtime.  */
134
  RELOC_NUMBER (R_ARM_GLOB_DAT,          21)   /* Create GOT entry.  */
135
  RELOC_NUMBER (R_ARM_JUMP_SLOT,         22)   /* Create PLT entry.  */
136
  RELOC_NUMBER (R_ARM_RELATIVE,          23)   /* Adjust by program base.  */
137
  RELOC_NUMBER (R_ARM_GOTOFF32,          24)   /* 32 bit offset to GOT.  */
138
  RELOC_NUMBER (R_ARM_BASE_PREL,         25)   /* 32 bit PC relative offset to GOT.  */
139
  RELOC_NUMBER (R_ARM_GOT_BREL,          26)   /* 32 bit GOT entry.  */
140
  RELOC_NUMBER (R_ARM_PLT32,             27)   /* deprecated - 32 bit PLT address.  */
141
  RELOC_NUMBER (R_ARM_CALL,              28)
142
  RELOC_NUMBER (R_ARM_JUMP24,            29)
143
  RELOC_NUMBER (R_ARM_THM_JUMP24,        30)
144
  RELOC_NUMBER (R_ARM_BASE_ABS,          31)
145
  RELOC_NUMBER (R_ARM_ALU_PCREL7_0,      32)   /* obsolete */
146
  RELOC_NUMBER (R_ARM_ALU_PCREL15_8,     33)   /* obsolete */
147
  RELOC_NUMBER (R_ARM_ALU_PCREL23_15,    34)   /* obsolete */
148
  RELOC_NUMBER (R_ARM_LDR_SBREL_11_0,    35)   /* deprecated, should have _NC suffix */
149
  RELOC_NUMBER (R_ARM_ALU_SBREL_19_12,   36)   /* deprecated, should have _NC suffix */
150
  RELOC_NUMBER (R_ARM_ALU_SBREL_27_20,   37)   /* deprecated, should have _CK suffix */
151
  RELOC_NUMBER (R_ARM_TARGET1,           38)
152
  RELOC_NUMBER (R_ARM_SBREL31,           39)   /* deprecated */
153
  RELOC_NUMBER (R_ARM_V4BX,              40)
154
  RELOC_NUMBER (R_ARM_TARGET2,           41)
155
  RELOC_NUMBER (R_ARM_PREL31,            42)
156
  RELOC_NUMBER (R_ARM_MOVW_ABS_NC,       43)
157
  RELOC_NUMBER (R_ARM_MOVT_ABS,          44)
158
  RELOC_NUMBER (R_ARM_MOVW_PREL_NC,      45)
159
  RELOC_NUMBER (R_ARM_MOVT_PREL,         46)
160
  RELOC_NUMBER (R_ARM_THM_MOVW_ABS_NC,   47)
161
  RELOC_NUMBER (R_ARM_THM_MOVT_ABS,      48)
162
  RELOC_NUMBER (R_ARM_THM_MOVW_PREL_NC,  49)
163
  RELOC_NUMBER (R_ARM_THM_MOVT_PREL,     50)
164
  RELOC_NUMBER (R_ARM_THM_JUMP19,        51)
165
  RELOC_NUMBER (R_ARM_THM_JUMP6,         52)
166
  RELOC_NUMBER (R_ARM_THM_ALU_PREL_11_0, 53)
167
  RELOC_NUMBER (R_ARM_THM_PC12,          54)
168
  RELOC_NUMBER (R_ARM_ABS32_NOI,         55)
169
  RELOC_NUMBER (R_ARM_REL32_NOI,         56)
170
  RELOC_NUMBER (R_ARM_ALU_PC_G0_NC,      57)
171
  RELOC_NUMBER (R_ARM_ALU_PC_G0,         58)
172
  RELOC_NUMBER (R_ARM_ALU_PC_G1_NC,      59)
173
  RELOC_NUMBER (R_ARM_ALU_PC_G1,         60)
174
  RELOC_NUMBER (R_ARM_ALU_PC_G2,         61)
175
  RELOC_NUMBER (R_ARM_LDR_PC_G1,         62)
176
  RELOC_NUMBER (R_ARM_LDR_PC_G2,         63)
177
  RELOC_NUMBER (R_ARM_LDRS_PC_G0,        64)
178
  RELOC_NUMBER (R_ARM_LDRS_PC_G1,        65)
179
  RELOC_NUMBER (R_ARM_LDRS_PC_G2,        66)
180
  RELOC_NUMBER (R_ARM_LDC_PC_G0,         67)
181
  RELOC_NUMBER (R_ARM_LDC_PC_G1,         68)
182
  RELOC_NUMBER (R_ARM_LDC_PC_G2,         69)
183
  RELOC_NUMBER (R_ARM_ALU_SB_G0_NC,      70)
184
  RELOC_NUMBER (R_ARM_ALU_SB_G0,         71)
185
  RELOC_NUMBER (R_ARM_ALU_SB_G1_NC,      72)
186
  RELOC_NUMBER (R_ARM_ALU_SB_G1,         73)
187
  RELOC_NUMBER (R_ARM_ALU_SB_G2,         74)
188
  RELOC_NUMBER (R_ARM_LDR_SB_G0,         75)
189
  RELOC_NUMBER (R_ARM_LDR_SB_G1,         76)
190
  RELOC_NUMBER (R_ARM_LDR_SB_G2,         77)
191
  RELOC_NUMBER (R_ARM_LDRS_SB_G0,        78)
192
  RELOC_NUMBER (R_ARM_LDRS_SB_G1,        79)
193
  RELOC_NUMBER (R_ARM_LDRS_SB_G2,        80)
194
  RELOC_NUMBER (R_ARM_LDC_SB_G0,         81)
195
  RELOC_NUMBER (R_ARM_LDC_SB_G1,         82)
196
  RELOC_NUMBER (R_ARM_LDC_SB_G2,         83)
197
  RELOC_NUMBER (R_ARM_MOVW_BREL_NC,      84)
198
  RELOC_NUMBER (R_ARM_MOVT_BREL,         85)
199
  RELOC_NUMBER (R_ARM_MOVW_BREL,         86)
200
  RELOC_NUMBER (R_ARM_THM_MOVW_BREL_NC,  87)
201
  RELOC_NUMBER (R_ARM_THM_MOVT_BREL,     88)
202
  RELOC_NUMBER (R_ARM_THM_MOVW_BREL,     89)
203
  RELOC_NUMBER (R_ARM_TLS_GOTDESC,       90)
204
  RELOC_NUMBER (R_ARM_TLS_CALL,          91)
205
  RELOC_NUMBER (R_ARM_TLS_DESCSEQ,       92)
206
  RELOC_NUMBER (R_ARM_THM_TLS_CALL,      93)
207
  RELOC_NUMBER (R_ARM_PLT32_ABS,         94)
208
  RELOC_NUMBER (R_ARM_GOT_ABS,           95)
209
  RELOC_NUMBER (R_ARM_GOT_PREL,          96)
210
  RELOC_NUMBER (R_ARM_GOT_BREL12,        97)
211
  RELOC_NUMBER (R_ARM_GOTOFF12,          98)
212
  RELOC_NUMBER (R_ARM_GOTRELAX,          99)
213
  RELOC_NUMBER (R_ARM_GNU_VTENTRY,      100)   /* deprecated - old C++ abi */
214
  RELOC_NUMBER (R_ARM_GNU_VTINHERIT,    101)   /* deprecated - old C++ abi */
215
  RELOC_NUMBER (R_ARM_THM_JUMP11,       102)
216
  RELOC_NUMBER (R_ARM_THM_JUMP8,        103)
217
  RELOC_NUMBER (R_ARM_TLS_GD32,         104)
218
  RELOC_NUMBER (R_ARM_TLS_LDM32,        105)
219
  RELOC_NUMBER (R_ARM_TLS_LDO32,        106)
220
  RELOC_NUMBER (R_ARM_TLS_IE32,         107)
221
  RELOC_NUMBER (R_ARM_TLS_LE32,         108)
222
  RELOC_NUMBER (R_ARM_TLS_LDO12,        109)
223
  RELOC_NUMBER (R_ARM_TLS_LE12,         110)
224
  RELOC_NUMBER (R_ARM_TLS_IE12GP,       111)
225
  /* 112 - 127 private range */
226
  RELOC_NUMBER (R_ARM_ME_TOO,           128)   /* obsolete */
227
  RELOC_NUMBER (R_ARM_THM_TLS_DESCSEQ  ,129)
228
 
229
  RELOC_NUMBER (R_ARM_IRELATIVE,        160)
230
 
231
  /* Extensions?  R=read-only?  */
232
  RELOC_NUMBER (R_ARM_RXPC25,           249)
233
  RELOC_NUMBER (R_ARM_RSBREL32,         250)
234
  RELOC_NUMBER (R_ARM_THM_RPC22,        251)
235
  RELOC_NUMBER (R_ARM_RREL32,           252)
236
  RELOC_NUMBER (R_ARM_RABS32,           253)
237
  RELOC_NUMBER (R_ARM_RPC24,            254)
238
  RELOC_NUMBER (R_ARM_RBASE,            255)
239
 
240
  /* Unofficial names for some of the relocs.  */
241
  FAKE_RELOC (R_ARM_GOTOFF,             R_ARM_GOTOFF32)   /* 32 bit offset to GOT.  */
242
  FAKE_RELOC (R_ARM_THM_PC22,           R_ARM_THM_CALL)
243
  FAKE_RELOC (R_ARM_THM_PC11,           R_ARM_THM_JUMP11)
244
  FAKE_RELOC (R_ARM_THM_PC9,            R_ARM_THM_JUMP8)
245
 
246
  /* Relocs with both a different name, and (apparently) different meaning in
247
     GNU usage.  */
248
  FAKE_RELOC (R_ARM_GOTPC,              R_ARM_BASE_PREL)  /* 32 bit PC relative offset to GOT.  */
249
  FAKE_RELOC (R_ARM_GOT32,              R_ARM_GOT_BREL)   /* 32 bit GOT entry.  */
250
  FAKE_RELOC (R_ARM_ROSEGREL32,         R_ARM_SBREL31)    /* ??? */
251
  FAKE_RELOC (R_ARM_AMP_VCALL9,         R_ARM_BREL_ADJ)   /* Thumb-something.  Not used.  */
252
 
253
END_RELOC_NUMBERS (R_ARM_max = 256)
254
 
255
#ifdef BFD_ARCH_SIZE
256
/* EABI object attributes.  */
257
 
258
enum
259
{
260
  /* 0-3 are generic.  */
261
  Tag_CPU_raw_name = 4,
262
  Tag_CPU_name,
263
  Tag_CPU_arch,
264
  Tag_CPU_arch_profile,
265
  Tag_ARM_ISA_use,
266
  Tag_THUMB_ISA_use,
267
  Tag_FP_arch,
268
  Tag_WMMX_arch,
269
  Tag_Advanced_SIMD_arch,
270
  Tag_PCS_config,
271
  Tag_ABI_PCS_R9_use,
272
  Tag_ABI_PCS_RW_data,
273
  Tag_ABI_PCS_RO_data,
274
  Tag_ABI_PCS_GOT_use,
275
  Tag_ABI_PCS_wchar_t,
276
  Tag_ABI_FP_rounding,
277
  Tag_ABI_FP_denormal,
278
  Tag_ABI_FP_exceptions,
279
  Tag_ABI_FP_user_exceptions,
280
  Tag_ABI_FP_number_model,
281
  Tag_ABI_align_needed,
282
  Tag_ABI_align_preserved,
283
  Tag_ABI_enum_size,
284
  Tag_ABI_HardFP_use,
285
  Tag_ABI_VFP_args,
286
  Tag_ABI_WMMX_args,
287
  Tag_ABI_optimization_goals,
288
  Tag_ABI_FP_optimization_goals,
289
  /* 32 is generic (Tag_compatibility).  */
290
  Tag_undefined33 = 33,
291
  Tag_CPU_unaligned_access,
292
  Tag_undefined35,
293
  Tag_FP_HP_extension,
294
  Tag_undefined37,
295
  Tag_ABI_FP_16bit_format,
296
  Tag_undefined39,
297
  Tag_undefined40,
298
  Tag_undefined41,
299
  Tag_MPextension_use,
300
  Tag_undefined_43,
301
  Tag_DIV_use,
302
  Tag_nodefaults = 64,
303
  Tag_also_compatible_with,
304
  Tag_T2EE_use,
305
  Tag_conformance,
306
  Tag_Virtualization_use,
307
  Tag_undefined69,
308
  Tag_MPextension_use_legacy,
309
 
310
  /* The following tags are legacy names for other tags.  */
311
  Tag_VFP_arch = Tag_FP_arch,
312
  Tag_ABI_align8_needed = Tag_ABI_align_needed,
313
  Tag_ABI_align8_preserved = Tag_ABI_align_preserved,
314
  Tag_VFP_HP_extension = Tag_FP_HP_extension
315
};
316
 
317
#endif
318
 
319
/* The name of the note section used to identify arm variants.  */
320
#define ARM_NOTE_SECTION ".note.gnu.arm.ident"
321
 
322
/* Special section names.  */
323
#define ELF_STRING_ARM_unwind           ".ARM.exidx"
324
#define ELF_STRING_ARM_unwind_info      ".ARM.extab"
325
#define ELF_STRING_ARM_unwind_once      ".gnu.linkonce.armexidx."
326
#define ELF_STRING_ARM_unwind_info_once ".gnu.linkonce.armextab."
327
 
328
enum arm_st_branch_type {
329
  ST_BRANCH_TO_ARM,
330
  ST_BRANCH_TO_THUMB,
331
  ST_BRANCH_LONG,
332
  ST_BRANCH_UNKNOWN
333
};
334
 
335
#define ARM_SYM_BRANCH_TYPE(SYM) \
336
  ((enum arm_st_branch_type) (SYM)->st_target_internal)
337
 
338
#endif /* _ELF_ARM_H */

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