| 1 | // arm.h -- ELF definitions specific to EM_ARM -*- C++ -*- |
| 2 | |
| 3 | // Copyright (C) 2009-2019 Free Software Foundation, Inc. |
| 4 | // Written by Doug Kwan <dougkwan@google.com>. |
| 5 | |
| 6 | // This file is part of elfcpp. |
| 7 | |
| 8 | // This program is free software; you can redistribute it and/or |
| 9 | // modify it under the terms of the GNU Library General Public License |
| 10 | // as published by the Free Software Foundation; either version 2, or |
| 11 | // (at your option) any later version. |
| 12 | |
| 13 | // In addition to the permissions in the GNU Library General Public |
| 14 | // License, the Free Software Foundation gives you unlimited |
| 15 | // permission to link the compiled version of this file into |
| 16 | // combinations with other programs, and to distribute those |
| 17 | // combinations without any restriction coming from the use of this |
| 18 | // file. (The Library Public License restrictions do apply in other |
| 19 | // respects; for example, they cover modification of the file, and |
| 20 | // distribution when not linked into a combined executable.) |
| 21 | |
| 22 | // This program is distributed in the hope that it will be useful, but |
| 23 | // WITHOUT ANY WARRANTY; without even the implied warranty of |
| 24 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 25 | // Library General Public License for more details. |
| 26 | |
| 27 | // You should have received a copy of the GNU Library General Public |
| 28 | // License along with this program; if not, write to the Free Software |
| 29 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA |
| 30 | // 02110-1301, USA. |
| 31 | |
| 32 | #ifndef ELFCPP_ARM_H |
| 33 | #define ELFCPP_ARM_H |
| 34 | |
| 35 | // The relocation type information is taken from: |
| 36 | // |
| 37 | // ELF for the ARM Architecture |
| 38 | // Document number: ARM IHI 0044C, current through ABI release 2.07 |
| 39 | // Date of Issue: 10th October, 2008 |
| 40 | // |
| 41 | |
| 42 | namespace elfcpp |
| 43 | { |
| 44 | |
| 45 | // |
| 46 | // ARM Relocations Codes |
| 47 | // |
| 48 | |
| 49 | // Operation notes: |
| 50 | // S: Address of the symbol. |
| 51 | // A: Addend for relocation. |
| 52 | // P: Address of the place being relocated. |
| 53 | // Pa: Adjusted address of the place being relocated (P & 0xfffffffc) |
| 54 | // T: is 1 if S has type STT_FUNC and the symbol addresses a Thumb |
| 55 | // instruction.Thumb-bit; it is 0 otherwise. |
| 56 | // B(S): Addressing origin of the output segment defining S. |
| 57 | // GOT_ORG: Addressing origin of the Global Offset Table. |
| 58 | // GOT(S): Address of the GOT entry for S. |
| 59 | // |
| 60 | |
| 61 | enum |
| 62 | { |
| 63 | // Type Class Operation |
| 64 | // ------------------------------ |
| 65 | R_ARM_NONE = 0, // Static Misc |
| 66 | R_ARM_PC24 = 1, // Deprecated ARM ((S + A) | T) - P |
| 67 | R_ARM_ABS32 = 2, // Static Data (S + A) | T |
| 68 | R_ARM_REL32 = 3, // Static Data ((S + A) | T) - P |
| 69 | R_ARM_LDR_PC_G0 = 4, // Static ARM S + A - P |
| 70 | R_ARM_ABS16 = 5, // Static Data S + A |
| 71 | R_ARM_ABS12 = 6, // Static ARM S + A |
| 72 | R_ARM_THM_ABS5 = 7, // Static Thumb16 S + A |
| 73 | R_ARM_ABS8 = 8, // Static Data S + A |
| 74 | R_ARM_SBREL32 = 9, // Static Data ((S + A) | T) - B(S) |
| 75 | R_ARM_THM_CALL = 10, // Static Thumb32 ((S + A) | T) - P |
| 76 | R_ARM_THM_PC8 = 11, // Static Thumb16 |
| 77 | R_ARM_BREL_ADJ = 12, // Dynamic Data DeltaB(S) + A |
| 78 | R_ARM_TLS_DESC = 13, // Dynamic Data |
| 79 | R_ARM_THM_SWI8 = 14, // Obsolete |
| 80 | R_ARM_XPC25 = 15, // Obsolete |
| 81 | R_ARM_THM_XPC22 = 16, // Obsolete |
| 82 | R_ARM_TLS_DTPMOD32 = 17, // Dynamic Data Module(S) |
| 83 | R_ARM_TLS_DTPOFF32 = 18, // Dynamic Data S + A - TLS |
| 84 | R_ARM_TLS_TPOFF32 = 19, // Dynamic Data S + A - tp |
| 85 | R_ARM_COPY = 20, // Dynamic Misc |
| 86 | R_ARM_GLOB_DAT = 21, // Dynamic Data (S + A) | T |
| 87 | R_ARM_JUMP_SLOT = 22, // Dynamic Data (S + A) | T |
| 88 | R_ARM_RELATIVE = 23, // Dynamic Data B(S) + A |
| 89 | R_ARM_GOTOFF32 = 24, // Static Data (((S + A) | T) - GOT_ORG |
| 90 | R_ARM_BASE_PREL = 25, // Static Data B(S) + A - P |
| 91 | R_ARM_GOT_BREL = 26, // Static Data GOT(S) + A - GOT_ORG |
| 92 | R_ARM_PLT32 = 27, // Deprecated ARM ((S + A) | T) - P |
| 93 | R_ARM_CALL = 28, // Static ARM ((S + A) | T) - P |
| 94 | R_ARM_JUMP24 = 29, // Static ARM ((S + A) | T) - P |
| 95 | R_ARM_THM_JUMP24 = 30, // Static Thumb32 ((S + A) | T) - P |
| 96 | R_ARM_BASE_ABS = 31, // Static Data B(S) + A |
| 97 | R_ARM_ALU_PCREL_7_0 = 32, // Obsolete |
| 98 | R_ARM_ALU_PCREL_15_8 = 33, // Obsolete |
| 99 | R_ARM_ALU_PCREL_23_15 = 34, // Obsolete |
| 100 | R_ARM_LDR_SBREL_11_0_NC = 35, // Deprecated ARM S + A - B(S) |
| 101 | R_ARM_ALU_SBREL_19_12_NC = 36,// Deprecated ARM S + A - B(S) |
| 102 | R_ARM_ALU_SBREL_27_20_CK = 37,// Deprecated ARM S + A - B(S) |
| 103 | R_ARM_TARGET1 = 38, // Data Misc (S + A) | T or |
| 104 | // ((S + A) | T) - P |
| 105 | R_ARM_SBREL31 = 39, // Deprecated Data ((S + A) | T) - B(S) |
| 106 | R_ARM_V4BX = 40, // Static Misc |
| 107 | R_ARM_TARGET2 = 41, // Static Misc |
| 108 | R_ARM_PREL31 = 42, // Static Data ((S + A) | T) - P |
| 109 | R_ARM_MOVW_ABS_NC = 43, // Static ARM (S + A) | T |
| 110 | R_ARM_MOVT_ABS = 44, // Static ARM S + A |
| 111 | R_ARM_MOVW_PREL_NC = 45, // Static ARM ((S + A) | T) - P |
| 112 | R_ARM_MOVT_PREL = 46, // Static ARM S + A - P |
| 113 | R_ARM_THM_MOVW_ABS_NC = 47, // Static Thumb32 (S + A) | T |
| 114 | R_ARM_THM_MOVT_ABS = 48, // Static Thumb32 S + A - P |
| 115 | R_ARM_THM_MOVW_PREL_NC = 49, // Static Thumb32 ((S + A) | T) - P |
| 116 | R_ARM_THM_MOVT_PREL = 50, // Static Thumb32 S + A - P |
| 117 | R_ARM_THM_JUMP19 = 51, // Static Thumb32 ((S + A) | T) - P |
| 118 | R_ARM_THM_JUMP6 = 52, // Static Thumb16 S + A - P |
| 119 | R_ARM_THM_ALU_PREL_11_0 = 53, // Static Thumb32 ((S + A) | T) - Pa |
| 120 | R_ARM_THM_PC12 = 54, // Static Thumb32 S + A - Pa |
| 121 | R_ARM_ABS32_NOI = 55, // Static Data S + A |
| 122 | R_ARM_REL32_NOI = 56, // Static Data S + A - P |
| 123 | R_ARM_ALU_PC_G0_NC = 57, // Static ARM ((S + A) | T) - P |
| 124 | R_ARM_ALU_PC_G0 = 58, // Static ARM ((S + A) | T) - P |
| 125 | R_ARM_ALU_PC_G1_NC = 59, // Static ARM ((S + A) | T) - P |
| 126 | R_ARM_ALU_PC_G1 = 60, // Static ARM ((S + A) | T) - P |
| 127 | R_ARM_ALU_PC_G2 = 61, // Static ARM ((S + A) | T) - P |
| 128 | R_ARM_LDR_PC_G1 = 62, // Static ARM S + A - P |
| 129 | R_ARM_LDR_PC_G2 = 63, // Static ARM S + A - P |
| 130 | R_ARM_LDRS_PC_G0 = 64, // Static ARM S + A - P |
| 131 | R_ARM_LDRS_PC_G1 = 65, // Static ARM S + A - P |
| 132 | R_ARM_LDRS_PC_G2 = 66, // Static ARM S + A - P |
| 133 | R_ARM_LDC_PC_G0 = 67, // Static ARM S + A - P |
| 134 | R_ARM_LDC_PC_G1 = 68, // Static ARM S + A - P |
| 135 | R_ARM_LDC_PC_G2 = 69, // Static ARM S + A - P |
| 136 | R_ARM_ALU_SB_G0_NC = 70, // Static ARM ((S + A) | T) - B(S) |
| 137 | R_ARM_ALU_SB_G0 = 71, // Static ARM ((S + A) | T) - B(S) |
| 138 | R_ARM_ALU_SB_G1_NC = 72, // Static ARM ((S + A) | T) - B(S) |
| 139 | R_ARM_ALU_SB_G1 = 73, // Static ARM ((S + A) | T) - B(S) |
| 140 | R_ARM_ALU_SB_G2 = 74, // Static ARM ((S + A) | T) - B(S) |
| 141 | R_ARM_LDR_SB_G0 = 75, // Static ARM S + A - B(S) |
| 142 | R_ARM_LDR_SB_G1 = 76, // Static ARM S + A - B(S) |
| 143 | R_ARM_LDR_SB_G2 = 77, // Static ARM S + A - B(S) |
| 144 | R_ARM_LDRS_SB_G0 = 78, // Static ARM S + A - B(S) |
| 145 | R_ARM_LDRS_SB_G1 = 79, // Static ARM S + A - B(S) |
| 146 | R_ARM_LDRS_SB_G2 = 80, // Static ARM S + A - B(S) |
| 147 | R_ARM_LDC_SB_G0 = 81, // Static ARM S + A - B(S) |
| 148 | R_ARM_LDC_SB_G1 = 82, // Static ARM S + A - B(S) |
| 149 | R_ARM_LDC_SB_G2 = 83, // Static ARM S + A - B(S) |
| 150 | R_ARM_MOVW_BREL_NC = 84, // Static ARM ((S + A) | T) - B(S) |
| 151 | R_ARM_MOVT_BREL = 85, // Static ARM S + A - B(S) |
| 152 | R_ARM_MOVW_BREL = 86, // Static ARM ((S + A) | T) - B(S) |
| 153 | R_ARM_THM_MOVW_BREL_NC = 87, // Static Thumb32 ((S + A) | T) - B(S) |
| 154 | R_ARM_THM_MOVT_BREL = 88, // Static Thumb32 S + A - B(S) |
| 155 | R_ARM_THM_MOVW_BREL = 89, // Static Thumb32 ((S + A) | T) - B(S) |
| 156 | R_ARM_TLS_GOTDESC = 90, // Static Data |
| 157 | R_ARM_TLS_CALL = 91, // Static ARM |
| 158 | R_ARM_TLS_DESCSEQ = 92, // Static ARM TLS relaxation |
| 159 | R_ARM_THM_TLS_CALL = 93, // Static Thumb32 |
| 160 | R_ARM_PLT32_ABS = 94, // Static Data PLT(S) + A |
| 161 | R_ARM_GOT_ABS = 95, // Static Data GOT(S) + A |
| 162 | R_ARM_GOT_PREL = 96, // Static Data GOT(S) + A - P |
| 163 | R_ARM_GOT_BREL12 = 97, // Static ARM GOT(S) + A - GOT_ORG |
| 164 | R_ARM_GOTOFF12 = 98, // Static ARM S + A - GOT_ROG |
| 165 | R_ARM_GOTRELAX = 99, // Static Misc |
| 166 | R_ARM_GNU_VTENTRY = 100, // Deprecated Data |
| 167 | R_ARM_GNU_VTINHERIT = 101, // Deprecated Data |
| 168 | R_ARM_THM_JUMP11 = 102, // Static Thumb16 S + A - P |
| 169 | R_ARM_THM_JUMP8 = 103, // Static Thumb16 S + A - P |
| 170 | R_ARM_TLS_GD32 = 104, // Static Data GOT(S) + A - P |
| 171 | R_ARM_TLS_LDM32 = 105, // Static Data GOT(S) + A - P |
| 172 | R_ARM_TLS_LDO32 = 106, // Static Data S + A - TLS |
| 173 | R_ARM_TLS_IE32 = 107, // Static Data GOT(S) + A - P |
| 174 | R_ARM_TLS_LE32 = 108, // Static Data S + A - tp |
| 175 | R_ARM_TLS_LDO12 = 109, // Static ARM S + A - TLS |
| 176 | R_ARM_TLS_LE12 = 110, // Static ARM S + A - tp |
| 177 | R_ARM_TLS_IE12GP = 111, // Static ARM GOT(S) + A - GOT_ORG |
| 178 | R_ARM_PRIVATE_0 = 112, // Private (n = 0, 1, ... 15) |
| 179 | R_ARM_PRIVATE_1 = 113, |
| 180 | R_ARM_PRIVATE_2 = 114, |
| 181 | R_ARM_PRIVATE_3 = 115, |
| 182 | R_ARM_PRIVATE_4 = 116, |
| 183 | R_ARM_PRIVATE_5 = 117, |
| 184 | R_ARM_PRIVATE_6 = 118, |
| 185 | R_ARM_PRIVATE_7 = 119, |
| 186 | R_ARM_PRIVATE_8 = 120, |
| 187 | R_ARM_PRIVATE_9 = 121, |
| 188 | R_ARM_PRIVATE_10 = 122, |
| 189 | R_ARM_PRIVATE_11 = 123, |
| 190 | R_ARM_PRIVATE_12 = 124, |
| 191 | R_ARM_PRIVATE_13 = 125, |
| 192 | R_ARM_PRIVATE_14 = 126, |
| 193 | R_ARM_PRIVATE_15 = 127, |
| 194 | R_ARM_ME_TOO = 128, // Obsolete |
| 195 | R_ARM_THM_TLS_DESCSEQ16 = 129,// Static Thumb16 |
| 196 | R_ARM_THM_TLS_DESCSEQ32 = 130,// Static Thumb32 |
| 197 | // 131 - 135 Unallocated |
| 198 | // Relocations for Armv8.1-M Mainline (BF/BFL) |
| 199 | R_ARM_THM_BF16 = 136, // Static Thumb32 ((S + A) | T) – P |
| 200 | R_ARM_THM_BF12 = 137, // Static Thumb32 ((S + A) | T) – P |
| 201 | R_ARM_THM_BF18 = 138, // Static Thumb32 ((S + A) | T) – P |
| 202 | // 139 Unallocated |
| 203 | // 140 - 159 Dynamic Reserved for future allocation |
| 204 | R_ARM_IRELATIVE = 160, // Dynamic |
| 205 | // 161 - 255 Unallocated |
| 206 | }; |
| 207 | |
| 208 | // e_flags values used for ARM. We only support flags defined in AAELF. |
| 209 | |
| 210 | enum |
| 211 | { |
| 212 | EF_ARM_BE8 = 0x00800000, |
| 213 | |
| 214 | // Mask to extract EABI version, not really a flag value. |
| 215 | EF_ARM_EABIMASK = 0xFF000000, |
| 216 | |
| 217 | EF_ARM_EABI_UNKNOWN = 0x00000000, |
| 218 | EF_ARM_EABI_VER1 = 0x01000000, |
| 219 | EF_ARM_EABI_VER2 = 0x02000000, |
| 220 | EF_ARM_EABI_VER3 = 0x03000000, |
| 221 | EF_ARM_EABI_VER4 = 0x04000000, |
| 222 | EF_ARM_EABI_VER5 = 0x05000000, |
| 223 | }; |
| 224 | |
| 225 | // Extract EABI version from flags. |
| 226 | |
| 227 | inline Elf_Word |
| 228 | arm_eabi_version(Elf_Word flags) |
| 229 | { return flags & EF_ARM_EABIMASK; } |
| 230 | |
| 231 | // EABI_VER5 e_flags values for identifying soft- and hard-float ABI |
| 232 | // choice. |
| 233 | enum |
| 234 | { |
| 235 | EF_ARM_ABI_FLOAT_SOFT = 0x200, |
| 236 | EF_ARM_ABI_FLOAT_HARD = 0x400, |
| 237 | }; |
| 238 | |
| 239 | // Values for the Tag_CPU_arch EABI attribute. |
| 240 | enum |
| 241 | { |
| 242 | TAG_CPU_ARCH_PRE_V4, |
| 243 | TAG_CPU_ARCH_V4, |
| 244 | TAG_CPU_ARCH_V4T, |
| 245 | TAG_CPU_ARCH_V5T, |
| 246 | TAG_CPU_ARCH_V5TE, |
| 247 | TAG_CPU_ARCH_V5TEJ, |
| 248 | TAG_CPU_ARCH_V6, |
| 249 | TAG_CPU_ARCH_V6KZ, |
| 250 | TAG_CPU_ARCH_V6T2, |
| 251 | TAG_CPU_ARCH_V6K, |
| 252 | TAG_CPU_ARCH_V7, |
| 253 | TAG_CPU_ARCH_V6_M, |
| 254 | TAG_CPU_ARCH_V6S_M, |
| 255 | TAG_CPU_ARCH_V7E_M, |
| 256 | TAG_CPU_ARCH_V8, |
| 257 | MAX_TAG_CPU_ARCH = TAG_CPU_ARCH_V8, |
| 258 | // Pseudo-architecture to allow objects to be compatible with the subset of |
| 259 | // armv4t and armv6-m. This value should never be stored in object files. |
| 260 | TAG_CPU_ARCH_V4T_PLUS_V6_M = (MAX_TAG_CPU_ARCH + 1) |
| 261 | }; |
| 262 | |
| 263 | // EABI object attributes. |
| 264 | enum |
| 265 | { |
| 266 | // 0-3 are generic. |
| 267 | Tag_CPU_raw_name = 4, |
| 268 | Tag_CPU_name = 5, |
| 269 | Tag_CPU_arch = 6, |
| 270 | Tag_CPU_arch_profile = 7, |
| 271 | Tag_ARM_ISA_use = 8, |
| 272 | Tag_THUMB_ISA_use = 9, |
| 273 | Tag_FP_arch = 10, |
| 274 | Tag_WMMX_arch = 11, |
| 275 | Tag_Advanced_SIMD_arch = 12, |
| 276 | Tag_PCS_config = 13, |
| 277 | Tag_ABI_PCS_R9_use = 14, |
| 278 | Tag_ABI_PCS_RW_data = 15, |
| 279 | Tag_ABI_PCS_RO_data = 16, |
| 280 | Tag_ABI_PCS_GOT_use = 17, |
| 281 | Tag_ABI_PCS_wchar_t = 18, |
| 282 | Tag_ABI_FP_rounding = 19, |
| 283 | Tag_ABI_FP_denormal = 20, |
| 284 | Tag_ABI_FP_exceptions = 21, |
| 285 | Tag_ABI_FP_user_exceptions = 22, |
| 286 | Tag_ABI_FP_number_model = 23, |
| 287 | Tag_ABI_align_needed = 24, |
| 288 | Tag_ABI_align_preserved = 25, |
| 289 | Tag_ABI_enum_size = 26, |
| 290 | Tag_ABI_HardFP_use = 27, |
| 291 | Tag_ABI_VFP_args = 28, |
| 292 | Tag_ABI_WMMX_args = 29, |
| 293 | Tag_ABI_optimization_goals = 30, |
| 294 | Tag_ABI_FP_optimization_goals = 31, |
| 295 | // 32 is generic (Tag_compatibility). |
| 296 | Tag_undefined33 = 33, |
| 297 | Tag_CPU_unaligned_access = 34, |
| 298 | Tag_undefined35 = 35, |
| 299 | Tag_FP_HP_extension = 36, |
| 300 | Tag_undefined37 = 37, |
| 301 | Tag_ABI_FP_16bit_format = 38, |
| 302 | Tag_undefined39 = 39, |
| 303 | Tag_undefined40 = 40, |
| 304 | Tag_undefined41 = 41, |
| 305 | Tag_MPextension_use = 42, |
| 306 | Tag_undefined43 = 43, |
| 307 | Tag_DIV_use = 44, |
| 308 | Tag_MVE_arch = 48, |
| 309 | Tag_nodefaults = 64, |
| 310 | Tag_also_compatible_with = 65, |
| 311 | Tag_T2EE_use = 66, |
| 312 | Tag_conformance = 67, |
| 313 | Tag_Virtualization_use = 68, |
| 314 | Tag_undefined69 = 69, |
| 315 | Tag_MPextension_use_legacy = 70, |
| 316 | |
| 317 | // The following tags are legacy names for other tags. |
| 318 | Tag_VFP_arch = Tag_FP_arch, |
| 319 | Tag_ABI_align8_needed = Tag_ABI_align_needed, |
| 320 | Tag_ABI_align8_preserved = Tag_ABI_align_preserved, |
| 321 | Tag_VFP_HP_extension = Tag_FP_HP_extension |
| 322 | }; |
| 323 | |
| 324 | // Values for Tag_ABI_PCS_R9_use. |
| 325 | enum |
| 326 | { |
| 327 | AEABI_R9_V6 = 0, |
| 328 | AEABI_R9_SB = 1, |
| 329 | AEABI_R9_TLS = 2, |
| 330 | AEABI_R9_unused = 3 |
| 331 | }; |
| 332 | |
| 333 | // Values for Tag_ABI_PCS_RW_data. |
| 334 | enum |
| 335 | { |
| 336 | AEABI_PCS_RW_data_absolute = 0, |
| 337 | AEABI_PCS_RW_data_PCrel = 1, |
| 338 | AEABI_PCS_RW_data_SBrel = 2, |
| 339 | AEABI_PCS_RW_data_unused = 3 |
| 340 | }; |
| 341 | |
| 342 | // Values for Tag_ABI_enum_size. |
| 343 | enum |
| 344 | { |
| 345 | AEABI_enum_unused = 0, |
| 346 | AEABI_enum_short = 1, |
| 347 | AEABI_enum_wide = 2, |
| 348 | AEABI_enum_forced_wide = 3 |
| 349 | }; |
| 350 | |
| 351 | // Values for Tag_ABI_FP_number_model. |
| 352 | enum |
| 353 | { |
| 354 | AEABI_FP_number_model_none = 0, |
| 355 | AEABI_FP_number_model_ieee754_number = 1, |
| 356 | AEABI_FP_number_model_rtabi = 2, |
| 357 | AEABI_FP_number_model_ieee754_all = 3 |
| 358 | }; |
| 359 | |
| 360 | // Values for Tag_ABI_VFP_args. |
| 361 | enum |
| 362 | { |
| 363 | AEABI_VFP_args_base = 0, |
| 364 | AEABI_VFP_args_vfp = 1, |
| 365 | AEABI_VFP_args_toolchain = 2, |
| 366 | AEABI_VFP_args_compatible = 3 |
| 367 | }; |
| 368 | |
| 369 | // For Exception Index Table. (Exception handling ABI for the ARM |
| 370 | // architectue, Section 5) |
| 371 | enum |
| 372 | { |
| 373 | EXIDX_CANTUNWIND = 1, |
| 374 | }; |
| 375 | |
| 376 | } // End namespace elfcpp. |
| 377 | |
| 378 | #endif // !defined(ELFCPP_ARM_H) |