1 /* ARM ELF support for BFD.
2 Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2009, 2010
3 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
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.
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.
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. */
24 #include "elf/reloc-macros.h"
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
40 /* Frame unwind information */
41 #define PT_ARM_EXIDX (PT_LOPROC + 1)
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
49 /* Constants defined in AAELF. */
50 #define EF_ARM_BE8 0x00800000
51 #define EF_ARM_LE8 0x00400000
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
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
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. */
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. */
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. */
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. */
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)
109 /* Relocation types. */
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)
229 RELOC_NUMBER (R_ARM_IRELATIVE, 160)
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)
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)
246 /* Relocs with both a different name, and (apparently) different meaning in
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. */
253 END_RELOC_NUMBERS (R_ARM_max = 256)
256 /* EABI object attributes. */
260 /* 0-3 are generic. */
261 Tag_CPU_raw_name = 4,
264 Tag_CPU_arch_profile,
269 Tag_Advanced_SIMD_arch,
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,
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,
295 Tag_ABI_FP_16bit_format,
303 Tag_also_compatible_with,
306 Tag_Virtualization_use,
308 Tag_MPextension_use_legacy,
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
319 /* The name of the note section used to identify arm variants. */
320 #define ARM_NOTE_SECTION ".note.gnu.arm.ident"
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."
328 enum arm_st_branch_type {
334 #define ARM_SYM_BRANCH_TYPE(SYM) \
335 ((enum arm_st_branch_type) (SYM)->st_target_internal)
337 #endif /* _ELF_ARM_H */