1 //===- llvm/BinaryFormat/ELF.h - ELF constants and structures ---*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This header contains common, non-processor-specific data structures and 10 // constants for the ELF file format. 11 // 12 // The details of the ELF32 bits in this file are largely based on the Tool 13 // Interface Standard (TIS) Executable and Linking Format (ELF) Specification 14 // Version 1.2, May 1995. The ELF64 stuff is based on ELF-64 Object File Format 15 // Version 1.5, Draft 2, May 1998 as well as OpenBSD header files. 16 // 17 //===----------------------------------------------------------------------===// 18 19 #ifndef LLVM_BINARYFORMAT_ELF_H 20 #define LLVM_BINARYFORMAT_ELF_H 21 22 #include "llvm/ADT/StringRef.h" 23 #include <cstdint> 24 #include <cstring> 25 26 namespace llvm { 27 namespace ELF { 28 29 using Elf32_Addr = uint32_t; // Program address 30 using Elf32_Off = uint32_t; // File offset 31 using Elf32_Half = uint16_t; 32 using Elf32_Word = uint32_t; 33 using Elf32_Sword = int32_t; 34 35 using Elf64_Addr = uint64_t; 36 using Elf64_Off = uint64_t; 37 using Elf64_Half = uint16_t; 38 using Elf64_Word = uint32_t; 39 using Elf64_Sword = int32_t; 40 using Elf64_Xword = uint64_t; 41 using Elf64_Sxword = int64_t; 42 43 // Object file magic string. 44 static const char ElfMagic[] = {0x7f, 'E', 'L', 'F', '\0'}; 45 46 // e_ident size and indices. 47 enum { 48 EI_MAG0 = 0, // File identification index. 49 EI_MAG1 = 1, // File identification index. 50 EI_MAG2 = 2, // File identification index. 51 EI_MAG3 = 3, // File identification index. 52 EI_CLASS = 4, // File class. 53 EI_DATA = 5, // Data encoding. 54 EI_VERSION = 6, // File version. 55 EI_OSABI = 7, // OS/ABI identification. 56 EI_ABIVERSION = 8, // ABI version. 57 EI_PAD = 9, // Start of padding bytes. 58 EI_NIDENT = 16 // Number of bytes in e_ident. 59 }; 60 61 struct Elf32_Ehdr { 62 unsigned char e_ident[EI_NIDENT]; // ELF Identification bytes 63 Elf32_Half e_type; // Type of file (see ET_* below) 64 Elf32_Half e_machine; // Required architecture for this file (see EM_*) 65 Elf32_Word e_version; // Must be equal to 1 66 Elf32_Addr e_entry; // Address to jump to in order to start program 67 Elf32_Off e_phoff; // Program header table's file offset, in bytes 68 Elf32_Off e_shoff; // Section header table's file offset, in bytes 69 Elf32_Word e_flags; // Processor-specific flags 70 Elf32_Half e_ehsize; // Size of ELF header, in bytes 71 Elf32_Half e_phentsize; // Size of an entry in the program header table 72 Elf32_Half e_phnum; // Number of entries in the program header table 73 Elf32_Half e_shentsize; // Size of an entry in the section header table 74 Elf32_Half e_shnum; // Number of entries in the section header table 75 Elf32_Half e_shstrndx; // Sect hdr table index of sect name string table 76 77 bool checkMagic() const { 78 return (memcmp(e_ident, ElfMagic, strlen(ElfMagic))) == 0; 79 } 80 81 unsigned char getFileClass() const { return e_ident[EI_CLASS]; } 82 unsigned char getDataEncoding() const { return e_ident[EI_DATA]; } 83 }; 84 85 // 64-bit ELF header. Fields are the same as for ELF32, but with different 86 // types (see above). 87 struct Elf64_Ehdr { 88 unsigned char e_ident[EI_NIDENT]; 89 Elf64_Half e_type; 90 Elf64_Half e_machine; 91 Elf64_Word e_version; 92 Elf64_Addr e_entry; 93 Elf64_Off e_phoff; 94 Elf64_Off e_shoff; 95 Elf64_Word e_flags; 96 Elf64_Half e_ehsize; 97 Elf64_Half e_phentsize; 98 Elf64_Half e_phnum; 99 Elf64_Half e_shentsize; 100 Elf64_Half e_shnum; 101 Elf64_Half e_shstrndx; 102 103 bool checkMagic() const { 104 return (memcmp(e_ident, ElfMagic, strlen(ElfMagic))) == 0; 105 } 106 107 unsigned char getFileClass() const { return e_ident[EI_CLASS]; } 108 unsigned char getDataEncoding() const { return e_ident[EI_DATA]; } 109 }; 110 111 // File types. 112 // See current registered ELF types at: 113 // http://www.sco.com/developers/gabi/latest/ch4.eheader.html 114 enum { 115 ET_NONE = 0, // No file type 116 ET_REL = 1, // Relocatable file 117 ET_EXEC = 2, // Executable file 118 ET_DYN = 3, // Shared object file 119 ET_CORE = 4, // Core file 120 ET_LOOS = 0xfe00, // Beginning of operating system-specific codes 121 ET_HIOS = 0xfeff, // Operating system-specific 122 ET_LOPROC = 0xff00, // Beginning of processor-specific codes 123 ET_HIPROC = 0xffff // Processor-specific 124 }; 125 126 // Versioning 127 enum { EV_NONE = 0, EV_CURRENT = 1 }; 128 129 // Machine architectures 130 // See current registered ELF machine architectures at: 131 // http://www.uxsglobal.com/developers/gabi/latest/ch4.eheader.html 132 enum { 133 EM_NONE = 0, // No machine 134 EM_M32 = 1, // AT&T WE 32100 135 EM_SPARC = 2, // SPARC 136 EM_386 = 3, // Intel 386 137 EM_68K = 4, // Motorola 68000 138 EM_88K = 5, // Motorola 88000 139 EM_IAMCU = 6, // Intel MCU 140 EM_860 = 7, // Intel 80860 141 EM_MIPS = 8, // MIPS R3000 142 EM_S370 = 9, // IBM System/370 143 EM_MIPS_RS3_LE = 10, // MIPS RS3000 Little-endian 144 EM_PARISC = 15, // Hewlett-Packard PA-RISC 145 EM_VPP500 = 17, // Fujitsu VPP500 146 EM_SPARC32PLUS = 18, // Enhanced instruction set SPARC 147 EM_960 = 19, // Intel 80960 148 EM_PPC = 20, // PowerPC 149 EM_PPC64 = 21, // PowerPC64 150 EM_S390 = 22, // IBM System/390 151 EM_SPU = 23, // IBM SPU/SPC 152 EM_V800 = 36, // NEC V800 153 EM_FR20 = 37, // Fujitsu FR20 154 EM_RH32 = 38, // TRW RH-32 155 EM_RCE = 39, // Motorola RCE 156 EM_ARM = 40, // ARM 157 EM_ALPHA = 41, // DEC Alpha 158 EM_SH = 42, // Hitachi SH 159 EM_SPARCV9 = 43, // SPARC V9 160 EM_TRICORE = 44, // Siemens TriCore 161 EM_ARC = 45, // Argonaut RISC Core 162 EM_H8_300 = 46, // Hitachi H8/300 163 EM_H8_300H = 47, // Hitachi H8/300H 164 EM_H8S = 48, // Hitachi H8S 165 EM_H8_500 = 49, // Hitachi H8/500 166 EM_IA_64 = 50, // Intel IA-64 processor architecture 167 EM_MIPS_X = 51, // Stanford MIPS-X 168 EM_COLDFIRE = 52, // Motorola ColdFire 169 EM_68HC12 = 53, // Motorola M68HC12 170 EM_MMA = 54, // Fujitsu MMA Multimedia Accelerator 171 EM_PCP = 55, // Siemens PCP 172 EM_NCPU = 56, // Sony nCPU embedded RISC processor 173 EM_NDR1 = 57, // Denso NDR1 microprocessor 174 EM_STARCORE = 58, // Motorola Star*Core processor 175 EM_ME16 = 59, // Toyota ME16 processor 176 EM_ST100 = 60, // STMicroelectronics ST100 processor 177 EM_TINYJ = 61, // Advanced Logic Corp. TinyJ embedded processor family 178 EM_X86_64 = 62, // AMD x86-64 architecture 179 EM_PDSP = 63, // Sony DSP Processor 180 EM_PDP10 = 64, // Digital Equipment Corp. PDP-10 181 EM_PDP11 = 65, // Digital Equipment Corp. PDP-11 182 EM_FX66 = 66, // Siemens FX66 microcontroller 183 EM_ST9PLUS = 67, // STMicroelectronics ST9+ 8/16 bit microcontroller 184 EM_ST7 = 68, // STMicroelectronics ST7 8-bit microcontroller 185 EM_68HC16 = 69, // Motorola MC68HC16 Microcontroller 186 EM_68HC11 = 70, // Motorola MC68HC11 Microcontroller 187 EM_68HC08 = 71, // Motorola MC68HC08 Microcontroller 188 EM_68HC05 = 72, // Motorola MC68HC05 Microcontroller 189 EM_SVX = 73, // Silicon Graphics SVx 190 EM_ST19 = 74, // STMicroelectronics ST19 8-bit microcontroller 191 EM_VAX = 75, // Digital VAX 192 EM_CRIS = 76, // Axis Communications 32-bit embedded processor 193 EM_JAVELIN = 77, // Infineon Technologies 32-bit embedded processor 194 EM_FIREPATH = 78, // Element 14 64-bit DSP Processor 195 EM_ZSP = 79, // LSI Logic 16-bit DSP Processor 196 EM_MMIX = 80, // Donald Knuth's educational 64-bit processor 197 EM_HUANY = 81, // Harvard University machine-independent object files 198 EM_PRISM = 82, // SiTera Prism 199 EM_AVR = 83, // Atmel AVR 8-bit microcontroller 200 EM_FR30 = 84, // Fujitsu FR30 201 EM_D10V = 85, // Mitsubishi D10V 202 EM_D30V = 86, // Mitsubishi D30V 203 EM_V850 = 87, // NEC v850 204 EM_M32R = 88, // Mitsubishi M32R 205 EM_MN10300 = 89, // Matsushita MN10300 206 EM_MN10200 = 90, // Matsushita MN10200 207 EM_PJ = 91, // picoJava 208 EM_OPENRISC = 92, // OpenRISC 32-bit embedded processor 209 EM_ARC_COMPACT = 93, // ARC International ARCompact processor (old 210 // spelling/synonym: EM_ARC_A5) 211 EM_XTENSA = 94, // Tensilica Xtensa Architecture 212 EM_VIDEOCORE = 95, // Alphamosaic VideoCore processor 213 EM_TMM_GPP = 96, // Thompson Multimedia General Purpose Processor 214 EM_NS32K = 97, // National Semiconductor 32000 series 215 EM_TPC = 98, // Tenor Network TPC processor 216 EM_SNP1K = 99, // Trebia SNP 1000 processor 217 EM_ST200 = 100, // STMicroelectronics (www.st.com) ST200 218 EM_IP2K = 101, // Ubicom IP2xxx microcontroller family 219 EM_MAX = 102, // MAX Processor 220 EM_CR = 103, // National Semiconductor CompactRISC microprocessor 221 EM_F2MC16 = 104, // Fujitsu F2MC16 222 EM_MSP430 = 105, // Texas Instruments embedded microcontroller msp430 223 EM_BLACKFIN = 106, // Analog Devices Blackfin (DSP) processor 224 EM_SE_C33 = 107, // S1C33 Family of Seiko Epson processors 225 EM_SEP = 108, // Sharp embedded microprocessor 226 EM_ARCA = 109, // Arca RISC Microprocessor 227 EM_UNICORE = 110, // Microprocessor series from PKU-Unity Ltd. and MPRC 228 // of Peking University 229 EM_EXCESS = 111, // eXcess: 16/32/64-bit configurable embedded CPU 230 EM_DXP = 112, // Icera Semiconductor Inc. Deep Execution Processor 231 EM_ALTERA_NIOS2 = 113, // Altera Nios II soft-core processor 232 EM_CRX = 114, // National Semiconductor CompactRISC CRX 233 EM_XGATE = 115, // Motorola XGATE embedded processor 234 EM_C166 = 116, // Infineon C16x/XC16x processor 235 EM_M16C = 117, // Renesas M16C series microprocessors 236 EM_DSPIC30F = 118, // Microchip Technology dsPIC30F Digital Signal 237 // Controller 238 EM_CE = 119, // Freescale Communication Engine RISC core 239 EM_M32C = 120, // Renesas M32C series microprocessors 240 EM_TSK3000 = 131, // Altium TSK3000 core 241 EM_RS08 = 132, // Freescale RS08 embedded processor 242 EM_SHARC = 133, // Analog Devices SHARC family of 32-bit DSP 243 // processors 244 EM_ECOG2 = 134, // Cyan Technology eCOG2 microprocessor 245 EM_SCORE7 = 135, // Sunplus S+core7 RISC processor 246 EM_DSP24 = 136, // New Japan Radio (NJR) 24-bit DSP Processor 247 EM_VIDEOCORE3 = 137, // Broadcom VideoCore III processor 248 EM_LATTICEMICO32 = 138, // RISC processor for Lattice FPGA architecture 249 EM_SE_C17 = 139, // Seiko Epson C17 family 250 EM_TI_C6000 = 140, // The Texas Instruments TMS320C6000 DSP family 251 EM_TI_C2000 = 141, // The Texas Instruments TMS320C2000 DSP family 252 EM_TI_C5500 = 142, // The Texas Instruments TMS320C55x DSP family 253 EM_MMDSP_PLUS = 160, // STMicroelectronics 64bit VLIW Data Signal Processor 254 EM_CYPRESS_M8C = 161, // Cypress M8C microprocessor 255 EM_R32C = 162, // Renesas R32C series microprocessors 256 EM_TRIMEDIA = 163, // NXP Semiconductors TriMedia architecture family 257 EM_HEXAGON = 164, // Qualcomm Hexagon processor 258 EM_8051 = 165, // Intel 8051 and variants 259 EM_STXP7X = 166, // STMicroelectronics STxP7x family of configurable 260 // and extensible RISC processors 261 EM_NDS32 = 167, // Andes Technology compact code size embedded RISC 262 // processor family 263 EM_ECOG1 = 168, // Cyan Technology eCOG1X family 264 EM_ECOG1X = 168, // Cyan Technology eCOG1X family 265 EM_MAXQ30 = 169, // Dallas Semiconductor MAXQ30 Core Micro-controllers 266 EM_XIMO16 = 170, // New Japan Radio (NJR) 16-bit DSP Processor 267 EM_MANIK = 171, // M2000 Reconfigurable RISC Microprocessor 268 EM_CRAYNV2 = 172, // Cray Inc. NV2 vector architecture 269 EM_RX = 173, // Renesas RX family 270 EM_METAG = 174, // Imagination Technologies META processor 271 // architecture 272 EM_MCST_ELBRUS = 175, // MCST Elbrus general purpose hardware architecture 273 EM_ECOG16 = 176, // Cyan Technology eCOG16 family 274 EM_CR16 = 177, // National Semiconductor CompactRISC CR16 16-bit 275 // microprocessor 276 EM_ETPU = 178, // Freescale Extended Time Processing Unit 277 EM_SLE9X = 179, // Infineon Technologies SLE9X core 278 EM_L10M = 180, // Intel L10M 279 EM_K10M = 181, // Intel K10M 280 EM_AARCH64 = 183, // ARM AArch64 281 EM_AVR32 = 185, // Atmel Corporation 32-bit microprocessor family 282 EM_STM8 = 186, // STMicroeletronics STM8 8-bit microcontroller 283 EM_TILE64 = 187, // Tilera TILE64 multicore architecture family 284 EM_TILEPRO = 188, // Tilera TILEPro multicore architecture family 285 EM_MICROBLAZE = 189, // Xilinx MicroBlaze 32-bit RISC soft processor core 286 EM_CUDA = 190, // NVIDIA CUDA architecture 287 EM_TILEGX = 191, // Tilera TILE-Gx multicore architecture family 288 EM_CLOUDSHIELD = 192, // CloudShield architecture family 289 EM_COREA_1ST = 193, // KIPO-KAIST Core-A 1st generation processor family 290 EM_COREA_2ND = 194, // KIPO-KAIST Core-A 2nd generation processor family 291 EM_ARC_COMPACT2 = 195, // Synopsys ARCompact V2 292 EM_OPEN8 = 196, // Open8 8-bit RISC soft processor core 293 EM_RL78 = 197, // Renesas RL78 family 294 EM_VIDEOCORE5 = 198, // Broadcom VideoCore V processor 295 EM_78KOR = 199, // Renesas 78KOR family 296 EM_56800EX = 200, // Freescale 56800EX Digital Signal Controller (DSC) 297 EM_BA1 = 201, // Beyond BA1 CPU architecture 298 EM_BA2 = 202, // Beyond BA2 CPU architecture 299 EM_XCORE = 203, // XMOS xCORE processor family 300 EM_MCHP_PIC = 204, // Microchip 8-bit PIC(r) family 301 EM_INTEL205 = 205, // Reserved by Intel 302 EM_INTEL206 = 206, // Reserved by Intel 303 EM_INTEL207 = 207, // Reserved by Intel 304 EM_INTEL208 = 208, // Reserved by Intel 305 EM_INTEL209 = 209, // Reserved by Intel 306 EM_KM32 = 210, // KM211 KM32 32-bit processor 307 EM_KMX32 = 211, // KM211 KMX32 32-bit processor 308 EM_KMX16 = 212, // KM211 KMX16 16-bit processor 309 EM_KMX8 = 213, // KM211 KMX8 8-bit processor 310 EM_KVARC = 214, // KM211 KVARC processor 311 EM_CDP = 215, // Paneve CDP architecture family 312 EM_COGE = 216, // Cognitive Smart Memory Processor 313 EM_COOL = 217, // iCelero CoolEngine 314 EM_NORC = 218, // Nanoradio Optimized RISC 315 EM_CSR_KALIMBA = 219, // CSR Kalimba architecture family 316 EM_AMDGPU = 224, // AMD GPU architecture 317 EM_RISCV = 243, // RISC-V 318 EM_LANAI = 244, // Lanai 32-bit processor 319 EM_BPF = 247, // Linux kernel bpf virtual machine 320 EM_VE = 251, // NEC SX-Aurora VE 321 EM_CSKY = 252, // C-SKY 32-bit processor 322 }; 323 324 // Object file classes. 325 enum { 326 ELFCLASSNONE = 0, 327 ELFCLASS32 = 1, // 32-bit object file 328 ELFCLASS64 = 2 // 64-bit object file 329 }; 330 331 // Object file byte orderings. 332 enum { 333 ELFDATANONE = 0, // Invalid data encoding. 334 ELFDATA2LSB = 1, // Little-endian object file 335 ELFDATA2MSB = 2 // Big-endian object file 336 }; 337 338 // OS ABI identification. 339 enum { 340 ELFOSABI_NONE = 0, // UNIX System V ABI 341 ELFOSABI_HPUX = 1, // HP-UX operating system 342 ELFOSABI_NETBSD = 2, // NetBSD 343 ELFOSABI_GNU = 3, // GNU/Linux 344 ELFOSABI_LINUX = 3, // Historical alias for ELFOSABI_GNU. 345 ELFOSABI_HURD = 4, // GNU/Hurd 346 ELFOSABI_SOLARIS = 6, // Solaris 347 ELFOSABI_AIX = 7, // AIX 348 ELFOSABI_IRIX = 8, // IRIX 349 ELFOSABI_FREEBSD = 9, // FreeBSD 350 ELFOSABI_TRU64 = 10, // TRU64 UNIX 351 ELFOSABI_MODESTO = 11, // Novell Modesto 352 ELFOSABI_OPENBSD = 12, // OpenBSD 353 ELFOSABI_OPENVMS = 13, // OpenVMS 354 ELFOSABI_NSK = 14, // Hewlett-Packard Non-Stop Kernel 355 ELFOSABI_AROS = 15, // AROS 356 ELFOSABI_FENIXOS = 16, // FenixOS 357 ELFOSABI_CLOUDABI = 17, // Nuxi CloudABI 358 ELFOSABI_FIRST_ARCH = 64, // First architecture-specific OS ABI 359 ELFOSABI_AMDGPU_HSA = 64, // AMD HSA runtime 360 ELFOSABI_AMDGPU_PAL = 65, // AMD PAL runtime 361 ELFOSABI_AMDGPU_MESA3D = 66, // AMD GCN GPUs (GFX6+) for MESA runtime 362 ELFOSABI_ARM = 97, // ARM 363 ELFOSABI_C6000_ELFABI = 64, // Bare-metal TMS320C6000 364 ELFOSABI_C6000_LINUX = 65, // Linux TMS320C6000 365 ELFOSABI_STANDALONE = 255, // Standalone (embedded) application 366 ELFOSABI_LAST_ARCH = 255 // Last Architecture-specific OS ABI 367 }; 368 369 // AMDGPU OS ABI Version identification. 370 enum { 371 // ELFABIVERSION_AMDGPU_HSA_V1 does not exist because OS ABI identification 372 // was never defined for V1. 373 ELFABIVERSION_AMDGPU_HSA_V2 = 0, 374 ELFABIVERSION_AMDGPU_HSA_V3 = 1, 375 ELFABIVERSION_AMDGPU_HSA_V4 = 2, 376 ELFABIVERSION_AMDGPU_HSA_V5 = 3 377 }; 378 379 #define ELF_RELOC(name, value) name = value, 380 381 // X86_64 relocations. 382 enum { 383 #include "ELFRelocs/x86_64.def" 384 }; 385 386 // i386 relocations. 387 enum { 388 #include "ELFRelocs/i386.def" 389 }; 390 391 // ELF Relocation types for PPC32 392 enum { 393 #include "ELFRelocs/PowerPC.def" 394 }; 395 396 // Specific e_flags for PPC64 397 enum { 398 // e_flags bits specifying ABI: 399 // 1 for original ABI using function descriptors, 400 // 2 for revised ABI without function descriptors, 401 // 0 for unspecified or not using any features affected by the differences. 402 EF_PPC64_ABI = 3 403 }; 404 405 // Special values for the st_other field in the symbol table entry for PPC64. 406 enum { 407 STO_PPC64_LOCAL_BIT = 5, 408 STO_PPC64_LOCAL_MASK = (7 << STO_PPC64_LOCAL_BIT) 409 }; 410 static inline int64_t decodePPC64LocalEntryOffset(unsigned Other) { 411 unsigned Val = (Other & STO_PPC64_LOCAL_MASK) >> STO_PPC64_LOCAL_BIT; 412 return ((1 << Val) >> 2) << 2; 413 } 414 415 // ELF Relocation types for PPC64 416 enum { 417 #include "ELFRelocs/PowerPC64.def" 418 }; 419 420 // ELF Relocation types for AArch64 421 enum { 422 #include "ELFRelocs/AArch64.def" 423 }; 424 425 // Special values for the st_other field in the symbol table entry for AArch64. 426 enum { 427 // Symbol may follow different calling convention than base PCS. 428 STO_AARCH64_VARIANT_PCS = 0x80 429 }; 430 431 // ARM Specific e_flags 432 enum : unsigned { 433 EF_ARM_SOFT_FLOAT = 0x00000200U, // Legacy pre EABI_VER5 434 EF_ARM_ABI_FLOAT_SOFT = 0x00000200U, // EABI_VER5 435 EF_ARM_VFP_FLOAT = 0x00000400U, // Legacy pre EABI_VER5 436 EF_ARM_ABI_FLOAT_HARD = 0x00000400U, // EABI_VER5 437 EF_ARM_EABI_UNKNOWN = 0x00000000U, 438 EF_ARM_EABI_VER1 = 0x01000000U, 439 EF_ARM_EABI_VER2 = 0x02000000U, 440 EF_ARM_EABI_VER3 = 0x03000000U, 441 EF_ARM_EABI_VER4 = 0x04000000U, 442 EF_ARM_EABI_VER5 = 0x05000000U, 443 EF_ARM_EABIMASK = 0xFF000000U 444 }; 445 446 // ELF Relocation types for ARM 447 enum { 448 #include "ELFRelocs/ARM.def" 449 }; 450 451 // ARC Specific e_flags 452 enum : unsigned { 453 EF_ARC_MACH_MSK = 0x000000ff, 454 EF_ARC_OSABI_MSK = 0x00000f00, 455 E_ARC_MACH_ARC600 = 0x00000002, 456 E_ARC_MACH_ARC601 = 0x00000004, 457 E_ARC_MACH_ARC700 = 0x00000003, 458 EF_ARC_CPU_ARCV2EM = 0x00000005, 459 EF_ARC_CPU_ARCV2HS = 0x00000006, 460 E_ARC_OSABI_ORIG = 0x00000000, 461 E_ARC_OSABI_V2 = 0x00000200, 462 E_ARC_OSABI_V3 = 0x00000300, 463 E_ARC_OSABI_V4 = 0x00000400, 464 EF_ARC_PIC = 0x00000100 465 }; 466 467 // ELF Relocation types for ARC 468 enum { 469 #include "ELFRelocs/ARC.def" 470 }; 471 472 // AVR specific e_flags 473 enum : unsigned { 474 EF_AVR_ARCH_AVR1 = 1, 475 EF_AVR_ARCH_AVR2 = 2, 476 EF_AVR_ARCH_AVR25 = 25, 477 EF_AVR_ARCH_AVR3 = 3, 478 EF_AVR_ARCH_AVR31 = 31, 479 EF_AVR_ARCH_AVR35 = 35, 480 EF_AVR_ARCH_AVR4 = 4, 481 EF_AVR_ARCH_AVR5 = 5, 482 EF_AVR_ARCH_AVR51 = 51, 483 EF_AVR_ARCH_AVR6 = 6, 484 EF_AVR_ARCH_AVRTINY = 100, 485 EF_AVR_ARCH_XMEGA1 = 101, 486 EF_AVR_ARCH_XMEGA2 = 102, 487 EF_AVR_ARCH_XMEGA3 = 103, 488 EF_AVR_ARCH_XMEGA4 = 104, 489 EF_AVR_ARCH_XMEGA5 = 105, 490 EF_AVR_ARCH_XMEGA6 = 106, 491 EF_AVR_ARCH_XMEGA7 = 107, 492 493 EF_AVR_ARCH_MASK = 0x7f, // EF_AVR_ARCH_xxx selection mask 494 495 EF_AVR_LINKRELAX_PREPARED = 0x80, // The file is prepared for linker 496 // relaxation to be applied 497 }; 498 499 // ELF Relocation types for AVR 500 enum { 501 #include "ELFRelocs/AVR.def" 502 }; 503 504 // Mips Specific e_flags 505 enum : unsigned { 506 EF_MIPS_NOREORDER = 0x00000001, // Don't reorder instructions 507 EF_MIPS_PIC = 0x00000002, // Position independent code 508 EF_MIPS_CPIC = 0x00000004, // Call object with Position independent code 509 EF_MIPS_ABI2 = 0x00000020, // File uses N32 ABI 510 EF_MIPS_32BITMODE = 0x00000100, // Code compiled for a 64-bit machine 511 // in 32-bit mode 512 EF_MIPS_FP64 = 0x00000200, // Code compiled for a 32-bit machine 513 // but uses 64-bit FP registers 514 EF_MIPS_NAN2008 = 0x00000400, // Uses IEE 754-2008 NaN encoding 515 516 // ABI flags 517 EF_MIPS_ABI_O32 = 0x00001000, // This file follows the first MIPS 32 bit ABI 518 EF_MIPS_ABI_O64 = 0x00002000, // O32 ABI extended for 64-bit architecture. 519 EF_MIPS_ABI_EABI32 = 0x00003000, // EABI in 32 bit mode. 520 EF_MIPS_ABI_EABI64 = 0x00004000, // EABI in 64 bit mode. 521 EF_MIPS_ABI = 0x0000f000, // Mask for selecting EF_MIPS_ABI_ variant. 522 523 // MIPS machine variant 524 EF_MIPS_MACH_NONE = 0x00000000, // A standard MIPS implementation. 525 EF_MIPS_MACH_3900 = 0x00810000, // Toshiba R3900 526 EF_MIPS_MACH_4010 = 0x00820000, // LSI R4010 527 EF_MIPS_MACH_4100 = 0x00830000, // NEC VR4100 528 EF_MIPS_MACH_4650 = 0x00850000, // MIPS R4650 529 EF_MIPS_MACH_4120 = 0x00870000, // NEC VR4120 530 EF_MIPS_MACH_4111 = 0x00880000, // NEC VR4111/VR4181 531 EF_MIPS_MACH_SB1 = 0x008a0000, // Broadcom SB-1 532 EF_MIPS_MACH_OCTEON = 0x008b0000, // Cavium Networks Octeon 533 EF_MIPS_MACH_XLR = 0x008c0000, // RMI Xlr 534 EF_MIPS_MACH_OCTEON2 = 0x008d0000, // Cavium Networks Octeon2 535 EF_MIPS_MACH_OCTEON3 = 0x008e0000, // Cavium Networks Octeon3 536 EF_MIPS_MACH_5400 = 0x00910000, // NEC VR5400 537 EF_MIPS_MACH_5900 = 0x00920000, // MIPS R5900 538 EF_MIPS_MACH_5500 = 0x00980000, // NEC VR5500 539 EF_MIPS_MACH_9000 = 0x00990000, // Unknown 540 EF_MIPS_MACH_LS2E = 0x00a00000, // ST Microelectronics Loongson 2E 541 EF_MIPS_MACH_LS2F = 0x00a10000, // ST Microelectronics Loongson 2F 542 EF_MIPS_MACH_LS3A = 0x00a20000, // Loongson 3A 543 EF_MIPS_MACH = 0x00ff0000, // EF_MIPS_MACH_xxx selection mask 544 545 // ARCH_ASE 546 EF_MIPS_MICROMIPS = 0x02000000, // microMIPS 547 EF_MIPS_ARCH_ASE_M16 = 0x04000000, // Has Mips-16 ISA extensions 548 EF_MIPS_ARCH_ASE_MDMX = 0x08000000, // Has MDMX multimedia extensions 549 EF_MIPS_ARCH_ASE = 0x0f000000, // Mask for EF_MIPS_ARCH_ASE_xxx flags 550 551 // ARCH 552 EF_MIPS_ARCH_1 = 0x00000000, // MIPS1 instruction set 553 EF_MIPS_ARCH_2 = 0x10000000, // MIPS2 instruction set 554 EF_MIPS_ARCH_3 = 0x20000000, // MIPS3 instruction set 555 EF_MIPS_ARCH_4 = 0x30000000, // MIPS4 instruction set 556 EF_MIPS_ARCH_5 = 0x40000000, // MIPS5 instruction set 557 EF_MIPS_ARCH_32 = 0x50000000, // MIPS32 instruction set per linux not elf.h 558 EF_MIPS_ARCH_64 = 0x60000000, // MIPS64 instruction set per linux not elf.h 559 EF_MIPS_ARCH_32R2 = 0x70000000, // mips32r2, mips32r3, mips32r5 560 EF_MIPS_ARCH_64R2 = 0x80000000, // mips64r2, mips64r3, mips64r5 561 EF_MIPS_ARCH_32R6 = 0x90000000, // mips32r6 562 EF_MIPS_ARCH_64R6 = 0xa0000000, // mips64r6 563 EF_MIPS_ARCH = 0xf0000000 // Mask for applying EF_MIPS_ARCH_ variant 564 }; 565 566 // ELF Relocation types for Mips 567 enum { 568 #include "ELFRelocs/Mips.def" 569 }; 570 571 // Special values for the st_other field in the symbol table entry for MIPS. 572 enum { 573 STO_MIPS_OPTIONAL = 0x04, // Symbol whose definition is optional 574 STO_MIPS_PLT = 0x08, // PLT entry related dynamic table record 575 STO_MIPS_PIC = 0x20, // PIC func in an object mixes PIC/non-PIC 576 STO_MIPS_MICROMIPS = 0x80, // MIPS Specific ISA for MicroMips 577 STO_MIPS_MIPS16 = 0xf0 // MIPS Specific ISA for Mips16 578 }; 579 580 // .MIPS.options section descriptor kinds 581 enum { 582 ODK_NULL = 0, // Undefined 583 ODK_REGINFO = 1, // Register usage information 584 ODK_EXCEPTIONS = 2, // Exception processing options 585 ODK_PAD = 3, // Section padding options 586 ODK_HWPATCH = 4, // Hardware patches applied 587 ODK_FILL = 5, // Linker fill value 588 ODK_TAGS = 6, // Space for tool identification 589 ODK_HWAND = 7, // Hardware AND patches applied 590 ODK_HWOR = 8, // Hardware OR patches applied 591 ODK_GP_GROUP = 9, // GP group to use for text/data sections 592 ODK_IDENT = 10, // ID information 593 ODK_PAGESIZE = 11 // Page size information 594 }; 595 596 // Hexagon-specific e_flags 597 enum { 598 // Object processor version flags, bits[11:0] 599 EF_HEXAGON_MACH_V2 = 0x00000001, // Hexagon V2 600 EF_HEXAGON_MACH_V3 = 0x00000002, // Hexagon V3 601 EF_HEXAGON_MACH_V4 = 0x00000003, // Hexagon V4 602 EF_HEXAGON_MACH_V5 = 0x00000004, // Hexagon V5 603 EF_HEXAGON_MACH_V55 = 0x00000005, // Hexagon V55 604 EF_HEXAGON_MACH_V60 = 0x00000060, // Hexagon V60 605 EF_HEXAGON_MACH_V62 = 0x00000062, // Hexagon V62 606 EF_HEXAGON_MACH_V65 = 0x00000065, // Hexagon V65 607 EF_HEXAGON_MACH_V66 = 0x00000066, // Hexagon V66 608 EF_HEXAGON_MACH_V67 = 0x00000067, // Hexagon V67 609 EF_HEXAGON_MACH_V67T = 0x00008067, // Hexagon V67T 610 EF_HEXAGON_MACH_V68 = 0x00000068, // Hexagon V68 611 EF_HEXAGON_MACH_V69 = 0x00000069, // Hexagon V69 612 EF_HEXAGON_MACH = 0x000003ff, // Hexagon V.. 613 614 // Highest ISA version flags 615 EF_HEXAGON_ISA_MACH = 0x00000000, // Same as specified in bits[11:0] 616 // of e_flags 617 EF_HEXAGON_ISA_V2 = 0x00000010, // Hexagon V2 ISA 618 EF_HEXAGON_ISA_V3 = 0x00000020, // Hexagon V3 ISA 619 EF_HEXAGON_ISA_V4 = 0x00000030, // Hexagon V4 ISA 620 EF_HEXAGON_ISA_V5 = 0x00000040, // Hexagon V5 ISA 621 EF_HEXAGON_ISA_V55 = 0x00000050, // Hexagon V55 ISA 622 EF_HEXAGON_ISA_V60 = 0x00000060, // Hexagon V60 ISA 623 EF_HEXAGON_ISA_V62 = 0x00000062, // Hexagon V62 ISA 624 EF_HEXAGON_ISA_V65 = 0x00000065, // Hexagon V65 ISA 625 EF_HEXAGON_ISA_V66 = 0x00000066, // Hexagon V66 ISA 626 EF_HEXAGON_ISA_V67 = 0x00000067, // Hexagon V67 ISA 627 EF_HEXAGON_ISA_V68 = 0x00000068, // Hexagon V68 ISA 628 EF_HEXAGON_ISA_V69 = 0x00000069, // Hexagon V69 ISA 629 EF_HEXAGON_ISA = 0x000003ff, // Hexagon V.. ISA 630 }; 631 632 // Hexagon-specific section indexes for common small data 633 enum { 634 SHN_HEXAGON_SCOMMON = 0xff00, // Other access sizes 635 SHN_HEXAGON_SCOMMON_1 = 0xff01, // Byte-sized access 636 SHN_HEXAGON_SCOMMON_2 = 0xff02, // Half-word-sized access 637 SHN_HEXAGON_SCOMMON_4 = 0xff03, // Word-sized access 638 SHN_HEXAGON_SCOMMON_8 = 0xff04 // Double-word-size access 639 }; 640 641 // ELF Relocation types for Hexagon 642 enum { 643 #include "ELFRelocs/Hexagon.def" 644 }; 645 646 // ELF Relocation type for Lanai. 647 enum { 648 #include "ELFRelocs/Lanai.def" 649 }; 650 651 // RISCV Specific e_flags 652 enum : unsigned { 653 EF_RISCV_RVC = 0x0001, 654 EF_RISCV_FLOAT_ABI = 0x0006, 655 EF_RISCV_FLOAT_ABI_SOFT = 0x0000, 656 EF_RISCV_FLOAT_ABI_SINGLE = 0x0002, 657 EF_RISCV_FLOAT_ABI_DOUBLE = 0x0004, 658 EF_RISCV_FLOAT_ABI_QUAD = 0x0006, 659 EF_RISCV_RVE = 0x0008, 660 EF_RISCV_TSO = 0x0010, 661 }; 662 663 // ELF Relocation types for RISC-V 664 enum { 665 #include "ELFRelocs/RISCV.def" 666 }; 667 668 enum { 669 // Symbol may follow different calling convention than the standard calling 670 // convention. 671 STO_RISCV_VARIANT_CC = 0x80 672 }; 673 674 // ELF Relocation types for S390/zSeries 675 enum { 676 #include "ELFRelocs/SystemZ.def" 677 }; 678 679 // ELF Relocation type for Sparc. 680 enum { 681 #include "ELFRelocs/Sparc.def" 682 }; 683 684 // AMDGPU specific e_flags. 685 enum : unsigned { 686 // Processor selection mask for EF_AMDGPU_MACH_* values. 687 EF_AMDGPU_MACH = 0x0ff, 688 689 // Not specified processor. 690 EF_AMDGPU_MACH_NONE = 0x000, 691 692 // R600-based processors. 693 694 // Radeon HD 2000/3000 Series (R600). 695 EF_AMDGPU_MACH_R600_R600 = 0x001, 696 EF_AMDGPU_MACH_R600_R630 = 0x002, 697 EF_AMDGPU_MACH_R600_RS880 = 0x003, 698 EF_AMDGPU_MACH_R600_RV670 = 0x004, 699 // Radeon HD 4000 Series (R700). 700 EF_AMDGPU_MACH_R600_RV710 = 0x005, 701 EF_AMDGPU_MACH_R600_RV730 = 0x006, 702 EF_AMDGPU_MACH_R600_RV770 = 0x007, 703 // Radeon HD 5000 Series (Evergreen). 704 EF_AMDGPU_MACH_R600_CEDAR = 0x008, 705 EF_AMDGPU_MACH_R600_CYPRESS = 0x009, 706 EF_AMDGPU_MACH_R600_JUNIPER = 0x00a, 707 EF_AMDGPU_MACH_R600_REDWOOD = 0x00b, 708 EF_AMDGPU_MACH_R600_SUMO = 0x00c, 709 // Radeon HD 6000 Series (Northern Islands). 710 EF_AMDGPU_MACH_R600_BARTS = 0x00d, 711 EF_AMDGPU_MACH_R600_CAICOS = 0x00e, 712 EF_AMDGPU_MACH_R600_CAYMAN = 0x00f, 713 EF_AMDGPU_MACH_R600_TURKS = 0x010, 714 715 // Reserved for R600-based processors. 716 EF_AMDGPU_MACH_R600_RESERVED_FIRST = 0x011, 717 EF_AMDGPU_MACH_R600_RESERVED_LAST = 0x01f, 718 719 // First/last R600-based processors. 720 EF_AMDGPU_MACH_R600_FIRST = EF_AMDGPU_MACH_R600_R600, 721 EF_AMDGPU_MACH_R600_LAST = EF_AMDGPU_MACH_R600_TURKS, 722 723 // AMDGCN-based processors. 724 EF_AMDGPU_MACH_AMDGCN_GFX600 = 0x020, 725 EF_AMDGPU_MACH_AMDGCN_GFX601 = 0x021, 726 EF_AMDGPU_MACH_AMDGCN_GFX700 = 0x022, 727 EF_AMDGPU_MACH_AMDGCN_GFX701 = 0x023, 728 EF_AMDGPU_MACH_AMDGCN_GFX702 = 0x024, 729 EF_AMDGPU_MACH_AMDGCN_GFX703 = 0x025, 730 EF_AMDGPU_MACH_AMDGCN_GFX704 = 0x026, 731 EF_AMDGPU_MACH_AMDGCN_RESERVED_0X27 = 0x027, 732 EF_AMDGPU_MACH_AMDGCN_GFX801 = 0x028, 733 EF_AMDGPU_MACH_AMDGCN_GFX802 = 0x029, 734 EF_AMDGPU_MACH_AMDGCN_GFX803 = 0x02a, 735 EF_AMDGPU_MACH_AMDGCN_GFX810 = 0x02b, 736 EF_AMDGPU_MACH_AMDGCN_GFX900 = 0x02c, 737 EF_AMDGPU_MACH_AMDGCN_GFX902 = 0x02d, 738 EF_AMDGPU_MACH_AMDGCN_GFX904 = 0x02e, 739 EF_AMDGPU_MACH_AMDGCN_GFX906 = 0x02f, 740 EF_AMDGPU_MACH_AMDGCN_GFX908 = 0x030, 741 EF_AMDGPU_MACH_AMDGCN_GFX909 = 0x031, 742 EF_AMDGPU_MACH_AMDGCN_GFX90C = 0x032, 743 EF_AMDGPU_MACH_AMDGCN_GFX1010 = 0x033, 744 EF_AMDGPU_MACH_AMDGCN_GFX1011 = 0x034, 745 EF_AMDGPU_MACH_AMDGCN_GFX1012 = 0x035, 746 EF_AMDGPU_MACH_AMDGCN_GFX1030 = 0x036, 747 EF_AMDGPU_MACH_AMDGCN_GFX1031 = 0x037, 748 EF_AMDGPU_MACH_AMDGCN_GFX1032 = 0x038, 749 EF_AMDGPU_MACH_AMDGCN_GFX1033 = 0x039, 750 EF_AMDGPU_MACH_AMDGCN_GFX602 = 0x03a, 751 EF_AMDGPU_MACH_AMDGCN_GFX705 = 0x03b, 752 EF_AMDGPU_MACH_AMDGCN_GFX805 = 0x03c, 753 EF_AMDGPU_MACH_AMDGCN_GFX1035 = 0x03d, 754 EF_AMDGPU_MACH_AMDGCN_GFX1034 = 0x03e, 755 EF_AMDGPU_MACH_AMDGCN_GFX90A = 0x03f, 756 EF_AMDGPU_MACH_AMDGCN_RESERVED_0X40 = 0x040, 757 EF_AMDGPU_MACH_AMDGCN_RESERVED_0X41 = 0x041, 758 EF_AMDGPU_MACH_AMDGCN_GFX1013 = 0x042, 759 EF_AMDGPU_MACH_AMDGCN_RESERVED_0X43 = 0x043, 760 EF_AMDGPU_MACH_AMDGCN_RESERVED_0X44 = 0x044, 761 EF_AMDGPU_MACH_AMDGCN_RESERVED_0X45 = 0x045, 762 763 // First/last AMDGCN-based processors. 764 EF_AMDGPU_MACH_AMDGCN_FIRST = EF_AMDGPU_MACH_AMDGCN_GFX600, 765 EF_AMDGPU_MACH_AMDGCN_LAST = EF_AMDGPU_MACH_AMDGCN_RESERVED_0X45, 766 767 // Indicates if the "xnack" target feature is enabled for all code contained 768 // in the object. 769 // 770 // Only valid for ELFOSABI_AMDGPU_HSA and ELFABIVERSION_AMDGPU_HSA_V2. 771 EF_AMDGPU_FEATURE_XNACK_V2 = 0x01, 772 // Indicates if the trap handler is enabled for all code contained 773 // in the object. 774 // 775 // Only valid for ELFOSABI_AMDGPU_HSA and ELFABIVERSION_AMDGPU_HSA_V2. 776 EF_AMDGPU_FEATURE_TRAP_HANDLER_V2 = 0x02, 777 778 // Indicates if the "xnack" target feature is enabled for all code contained 779 // in the object. 780 // 781 // Only valid for ELFOSABI_AMDGPU_HSA and ELFABIVERSION_AMDGPU_HSA_V3. 782 EF_AMDGPU_FEATURE_XNACK_V3 = 0x100, 783 // Indicates if the "sramecc" target feature is enabled for all code 784 // contained in the object. 785 // 786 // Only valid for ELFOSABI_AMDGPU_HSA and ELFABIVERSION_AMDGPU_HSA_V3. 787 EF_AMDGPU_FEATURE_SRAMECC_V3 = 0x200, 788 789 // XNACK selection mask for EF_AMDGPU_FEATURE_XNACK_* values. 790 // 791 // Only valid for ELFOSABI_AMDGPU_HSA and ELFABIVERSION_AMDGPU_HSA_V4. 792 EF_AMDGPU_FEATURE_XNACK_V4 = 0x300, 793 // XNACK is not supported. 794 EF_AMDGPU_FEATURE_XNACK_UNSUPPORTED_V4 = 0x000, 795 // XNACK is any/default/unspecified. 796 EF_AMDGPU_FEATURE_XNACK_ANY_V4 = 0x100, 797 // XNACK is off. 798 EF_AMDGPU_FEATURE_XNACK_OFF_V4 = 0x200, 799 // XNACK is on. 800 EF_AMDGPU_FEATURE_XNACK_ON_V4 = 0x300, 801 802 // SRAMECC selection mask for EF_AMDGPU_FEATURE_SRAMECC_* values. 803 // 804 // Only valid for ELFOSABI_AMDGPU_HSA and ELFABIVERSION_AMDGPU_HSA_V4. 805 EF_AMDGPU_FEATURE_SRAMECC_V4 = 0xc00, 806 // SRAMECC is not supported. 807 EF_AMDGPU_FEATURE_SRAMECC_UNSUPPORTED_V4 = 0x000, 808 // SRAMECC is any/default/unspecified. 809 EF_AMDGPU_FEATURE_SRAMECC_ANY_V4 = 0x400, 810 // SRAMECC is off. 811 EF_AMDGPU_FEATURE_SRAMECC_OFF_V4 = 0x800, 812 // SRAMECC is on. 813 EF_AMDGPU_FEATURE_SRAMECC_ON_V4 = 0xc00, 814 }; 815 816 // ELF Relocation types for AMDGPU 817 enum { 818 #include "ELFRelocs/AMDGPU.def" 819 }; 820 821 // ELF Relocation types for BPF 822 enum { 823 #include "ELFRelocs/BPF.def" 824 }; 825 826 // ELF Relocation types for M68k 827 enum { 828 #include "ELFRelocs/M68k.def" 829 }; 830 831 // MSP430 specific e_flags 832 enum : unsigned { 833 EF_MSP430_MACH_MSP430x11 = 11, 834 EF_MSP430_MACH_MSP430x11x1 = 110, 835 EF_MSP430_MACH_MSP430x12 = 12, 836 EF_MSP430_MACH_MSP430x13 = 13, 837 EF_MSP430_MACH_MSP430x14 = 14, 838 EF_MSP430_MACH_MSP430x15 = 15, 839 EF_MSP430_MACH_MSP430x16 = 16, 840 EF_MSP430_MACH_MSP430x20 = 20, 841 EF_MSP430_MACH_MSP430x22 = 22, 842 EF_MSP430_MACH_MSP430x23 = 23, 843 EF_MSP430_MACH_MSP430x24 = 24, 844 EF_MSP430_MACH_MSP430x26 = 26, 845 EF_MSP430_MACH_MSP430x31 = 31, 846 EF_MSP430_MACH_MSP430x32 = 32, 847 EF_MSP430_MACH_MSP430x33 = 33, 848 EF_MSP430_MACH_MSP430x41 = 41, 849 EF_MSP430_MACH_MSP430x42 = 42, 850 EF_MSP430_MACH_MSP430x43 = 43, 851 EF_MSP430_MACH_MSP430x44 = 44, 852 EF_MSP430_MACH_MSP430X = 45, 853 EF_MSP430_MACH_MSP430x46 = 46, 854 EF_MSP430_MACH_MSP430x47 = 47, 855 EF_MSP430_MACH_MSP430x54 = 54, 856 }; 857 858 // ELF Relocation types for MSP430 859 enum { 860 #include "ELFRelocs/MSP430.def" 861 }; 862 863 // ELF Relocation type for VE. 864 enum { 865 #include "ELFRelocs/VE.def" 866 }; 867 868 869 // ELF Relocation types for CSKY 870 enum { 871 #include "ELFRelocs/CSKY.def" 872 }; 873 874 #undef ELF_RELOC 875 876 // Section header. 877 struct Elf32_Shdr { 878 Elf32_Word sh_name; // Section name (index into string table) 879 Elf32_Word sh_type; // Section type (SHT_*) 880 Elf32_Word sh_flags; // Section flags (SHF_*) 881 Elf32_Addr sh_addr; // Address where section is to be loaded 882 Elf32_Off sh_offset; // File offset of section data, in bytes 883 Elf32_Word sh_size; // Size of section, in bytes 884 Elf32_Word sh_link; // Section type-specific header table index link 885 Elf32_Word sh_info; // Section type-specific extra information 886 Elf32_Word sh_addralign; // Section address alignment 887 Elf32_Word sh_entsize; // Size of records contained within the section 888 }; 889 890 // Section header for ELF64 - same fields as ELF32, different types. 891 struct Elf64_Shdr { 892 Elf64_Word sh_name; 893 Elf64_Word sh_type; 894 Elf64_Xword sh_flags; 895 Elf64_Addr sh_addr; 896 Elf64_Off sh_offset; 897 Elf64_Xword sh_size; 898 Elf64_Word sh_link; 899 Elf64_Word sh_info; 900 Elf64_Xword sh_addralign; 901 Elf64_Xword sh_entsize; 902 }; 903 904 // Special section indices. 905 enum { 906 SHN_UNDEF = 0, // Undefined, missing, irrelevant, or meaningless 907 SHN_LORESERVE = 0xff00, // Lowest reserved index 908 SHN_LOPROC = 0xff00, // Lowest processor-specific index 909 SHN_HIPROC = 0xff1f, // Highest processor-specific index 910 SHN_LOOS = 0xff20, // Lowest operating system-specific index 911 SHN_HIOS = 0xff3f, // Highest operating system-specific index 912 SHN_ABS = 0xfff1, // Symbol has absolute value; does not need relocation 913 SHN_COMMON = 0xfff2, // FORTRAN COMMON or C external global variables 914 SHN_XINDEX = 0xffff, // Mark that the index is >= SHN_LORESERVE 915 SHN_HIRESERVE = 0xffff // Highest reserved index 916 }; 917 918 // Section types. 919 enum : unsigned { 920 SHT_NULL = 0, // No associated section (inactive entry). 921 SHT_PROGBITS = 1, // Program-defined contents. 922 SHT_SYMTAB = 2, // Symbol table. 923 SHT_STRTAB = 3, // String table. 924 SHT_RELA = 4, // Relocation entries; explicit addends. 925 SHT_HASH = 5, // Symbol hash table. 926 SHT_DYNAMIC = 6, // Information for dynamic linking. 927 SHT_NOTE = 7, // Information about the file. 928 SHT_NOBITS = 8, // Data occupies no space in the file. 929 SHT_REL = 9, // Relocation entries; no explicit addends. 930 SHT_SHLIB = 10, // Reserved. 931 SHT_DYNSYM = 11, // Symbol table. 932 SHT_INIT_ARRAY = 14, // Pointers to initialization functions. 933 SHT_FINI_ARRAY = 15, // Pointers to termination functions. 934 SHT_PREINIT_ARRAY = 16, // Pointers to pre-init functions. 935 SHT_GROUP = 17, // Section group. 936 SHT_SYMTAB_SHNDX = 18, // Indices for SHN_XINDEX entries. 937 // Experimental support for SHT_RELR sections. For details, see proposal 938 // at https://groups.google.com/forum/#!topic/generic-abi/bX460iggiKg 939 SHT_RELR = 19, // Relocation entries; only offsets. 940 SHT_LOOS = 0x60000000, // Lowest operating system-specific type. 941 // Android packed relocation section types. 942 // https://android.googlesource.com/platform/bionic/+/6f12bfece5dcc01325e0abba56a46b1bcf991c69/tools/relocation_packer/src/elf_file.cc#37 943 SHT_ANDROID_REL = 0x60000001, 944 SHT_ANDROID_RELA = 0x60000002, 945 SHT_LLVM_ODRTAB = 0x6fff4c00, // LLVM ODR table. 946 SHT_LLVM_LINKER_OPTIONS = 0x6fff4c01, // LLVM Linker Options. 947 SHT_LLVM_ADDRSIG = 0x6fff4c03, // List of address-significant symbols 948 // for safe ICF. 949 SHT_LLVM_DEPENDENT_LIBRARIES = 950 0x6fff4c04, // LLVM Dependent Library Specifiers. 951 SHT_LLVM_SYMPART = 0x6fff4c05, // Symbol partition specification. 952 SHT_LLVM_PART_EHDR = 0x6fff4c06, // ELF header for loadable partition. 953 SHT_LLVM_PART_PHDR = 0x6fff4c07, // Phdrs for loadable partition. 954 SHT_LLVM_BB_ADDR_MAP = 0x6fff4c08, // LLVM Basic Block Address Map. 955 SHT_LLVM_CALL_GRAPH_PROFILE = 0x6fff4c09, // LLVM Call Graph Profile. 956 // Android's experimental support for SHT_RELR sections. 957 // https://android.googlesource.com/platform/bionic/+/b7feec74547f84559a1467aca02708ff61346d2a/libc/include/elf.h#512 958 SHT_ANDROID_RELR = 0x6fffff00, // Relocation entries; only offsets. 959 SHT_GNU_ATTRIBUTES = 0x6ffffff5, // Object attributes. 960 SHT_GNU_HASH = 0x6ffffff6, // GNU-style hash table. 961 SHT_GNU_verdef = 0x6ffffffd, // GNU version definitions. 962 SHT_GNU_verneed = 0x6ffffffe, // GNU version references. 963 SHT_GNU_versym = 0x6fffffff, // GNU symbol versions table. 964 SHT_HIOS = 0x6fffffff, // Highest operating system-specific type. 965 SHT_LOPROC = 0x70000000, // Lowest processor arch-specific type. 966 // Fixme: All this is duplicated in MCSectionELF. Why?? 967 // Exception Index table 968 SHT_ARM_EXIDX = 0x70000001U, 969 // BPABI DLL dynamic linking pre-emption map 970 SHT_ARM_PREEMPTMAP = 0x70000002U, 971 // Object file compatibility attributes 972 SHT_ARM_ATTRIBUTES = 0x70000003U, 973 SHT_ARM_DEBUGOVERLAY = 0x70000004U, 974 SHT_ARM_OVERLAYSECTION = 0x70000005U, 975 SHT_HEX_ORDERED = 0x70000000, // Link editor is to sort the entries in 976 // this section based on their sizes 977 SHT_X86_64_UNWIND = 0x70000001, // Unwind information 978 979 SHT_MIPS_REGINFO = 0x70000006, // Register usage information 980 SHT_MIPS_OPTIONS = 0x7000000d, // General options 981 SHT_MIPS_DWARF = 0x7000001e, // DWARF debugging section. 982 SHT_MIPS_ABIFLAGS = 0x7000002a, // ABI information. 983 984 SHT_MSP430_ATTRIBUTES = 0x70000003U, 985 986 SHT_RISCV_ATTRIBUTES = 0x70000003U, 987 988 SHT_HIPROC = 0x7fffffff, // Highest processor arch-specific type. 989 SHT_LOUSER = 0x80000000, // Lowest type reserved for applications. 990 SHT_HIUSER = 0xffffffff // Highest type reserved for applications. 991 }; 992 993 // Section flags. 994 enum : unsigned { 995 // Section data should be writable during execution. 996 SHF_WRITE = 0x1, 997 998 // Section occupies memory during program execution. 999 SHF_ALLOC = 0x2, 1000 1001 // Section contains executable machine instructions. 1002 SHF_EXECINSTR = 0x4, 1003 1004 // The data in this section may be merged. 1005 SHF_MERGE = 0x10, 1006 1007 // The data in this section is null-terminated strings. 1008 SHF_STRINGS = 0x20, 1009 1010 // A field in this section holds a section header table index. 1011 SHF_INFO_LINK = 0x40U, 1012 1013 // Adds special ordering requirements for link editors. 1014 SHF_LINK_ORDER = 0x80U, 1015 1016 // This section requires special OS-specific processing to avoid incorrect 1017 // behavior. 1018 SHF_OS_NONCONFORMING = 0x100U, 1019 1020 // This section is a member of a section group. 1021 SHF_GROUP = 0x200U, 1022 1023 // This section holds Thread-Local Storage. 1024 SHF_TLS = 0x400U, 1025 1026 // Identifies a section containing compressed data. 1027 SHF_COMPRESSED = 0x800U, 1028 1029 // This section should not be garbage collected by the linker. 1030 SHF_GNU_RETAIN = 0x200000, 1031 1032 // This section is excluded from the final executable or shared library. 1033 SHF_EXCLUDE = 0x80000000U, 1034 1035 // Start of target-specific flags. 1036 1037 SHF_MASKOS = 0x0ff00000, 1038 1039 // Bits indicating processor-specific flags. 1040 SHF_MASKPROC = 0xf0000000, 1041 1042 /// All sections with the "d" flag are grouped together by the linker to form 1043 /// the data section and the dp register is set to the start of the section by 1044 /// the boot code. 1045 XCORE_SHF_DP_SECTION = 0x10000000, 1046 1047 /// All sections with the "c" flag are grouped together by the linker to form 1048 /// the constant pool and the cp register is set to the start of the constant 1049 /// pool by the boot code. 1050 XCORE_SHF_CP_SECTION = 0x20000000, 1051 1052 // If an object file section does not have this flag set, then it may not hold 1053 // more than 2GB and can be freely referred to in objects using smaller code 1054 // models. Otherwise, only objects using larger code models can refer to them. 1055 // For example, a medium code model object can refer to data in a section that 1056 // sets this flag besides being able to refer to data in a section that does 1057 // not set it; likewise, a small code model object can refer only to code in a 1058 // section that does not set this flag. 1059 SHF_X86_64_LARGE = 0x10000000, 1060 1061 // All sections with the GPREL flag are grouped into a global data area 1062 // for faster accesses 1063 SHF_HEX_GPREL = 0x10000000, 1064 1065 // Section contains text/data which may be replicated in other sections. 1066 // Linker must retain only one copy. 1067 SHF_MIPS_NODUPES = 0x01000000, 1068 1069 // Linker must generate implicit hidden weak names. 1070 SHF_MIPS_NAMES = 0x02000000, 1071 1072 // Section data local to process. 1073 SHF_MIPS_LOCAL = 0x04000000, 1074 1075 // Do not strip this section. 1076 SHF_MIPS_NOSTRIP = 0x08000000, 1077 1078 // Section must be part of global data area. 1079 SHF_MIPS_GPREL = 0x10000000, 1080 1081 // This section should be merged. 1082 SHF_MIPS_MERGE = 0x20000000, 1083 1084 // Address size to be inferred from section entry size. 1085 SHF_MIPS_ADDR = 0x40000000, 1086 1087 // Section data is string data by default. 1088 SHF_MIPS_STRING = 0x80000000, 1089 1090 // Make code section unreadable when in execute-only mode 1091 SHF_ARM_PURECODE = 0x20000000 1092 }; 1093 1094 // Section Group Flags 1095 enum : unsigned { 1096 GRP_COMDAT = 0x1, 1097 GRP_MASKOS = 0x0ff00000, 1098 GRP_MASKPROC = 0xf0000000 1099 }; 1100 1101 // Symbol table entries for ELF32. 1102 struct Elf32_Sym { 1103 Elf32_Word st_name; // Symbol name (index into string table) 1104 Elf32_Addr st_value; // Value or address associated with the symbol 1105 Elf32_Word st_size; // Size of the symbol 1106 unsigned char st_info; // Symbol's type and binding attributes 1107 unsigned char st_other; // Must be zero; reserved 1108 Elf32_Half st_shndx; // Which section (header table index) it's defined in 1109 1110 // These accessors and mutators correspond to the ELF32_ST_BIND, 1111 // ELF32_ST_TYPE, and ELF32_ST_INFO macros defined in the ELF specification: 1112 unsigned char getBinding() const { return st_info >> 4; } 1113 unsigned char getType() const { return st_info & 0x0f; } 1114 void setBinding(unsigned char b) { setBindingAndType(b, getType()); } 1115 void setType(unsigned char t) { setBindingAndType(getBinding(), t); } 1116 void setBindingAndType(unsigned char b, unsigned char t) { 1117 st_info = (b << 4) + (t & 0x0f); 1118 } 1119 }; 1120 1121 // Symbol table entries for ELF64. 1122 struct Elf64_Sym { 1123 Elf64_Word st_name; // Symbol name (index into string table) 1124 unsigned char st_info; // Symbol's type and binding attributes 1125 unsigned char st_other; // Must be zero; reserved 1126 Elf64_Half st_shndx; // Which section (header tbl index) it's defined in 1127 Elf64_Addr st_value; // Value or address associated with the symbol 1128 Elf64_Xword st_size; // Size of the symbol 1129 1130 // These accessors and mutators are identical to those defined for ELF32 1131 // symbol table entries. 1132 unsigned char getBinding() const { return st_info >> 4; } 1133 unsigned char getType() const { return st_info & 0x0f; } 1134 void setBinding(unsigned char b) { setBindingAndType(b, getType()); } 1135 void setType(unsigned char t) { setBindingAndType(getBinding(), t); } 1136 void setBindingAndType(unsigned char b, unsigned char t) { 1137 st_info = (b << 4) + (t & 0x0f); 1138 } 1139 }; 1140 1141 // The size (in bytes) of symbol table entries. 1142 enum { 1143 SYMENTRY_SIZE32 = 16, // 32-bit symbol entry size 1144 SYMENTRY_SIZE64 = 24 // 64-bit symbol entry size. 1145 }; 1146 1147 // Symbol bindings. 1148 enum { 1149 STB_LOCAL = 0, // Local symbol, not visible outside obj file containing def 1150 STB_GLOBAL = 1, // Global symbol, visible to all object files being combined 1151 STB_WEAK = 2, // Weak symbol, like global but lower-precedence 1152 STB_GNU_UNIQUE = 10, 1153 STB_LOOS = 10, // Lowest operating system-specific binding type 1154 STB_HIOS = 12, // Highest operating system-specific binding type 1155 STB_LOPROC = 13, // Lowest processor-specific binding type 1156 STB_HIPROC = 15 // Highest processor-specific binding type 1157 }; 1158 1159 // Symbol types. 1160 enum { 1161 STT_NOTYPE = 0, // Symbol's type is not specified 1162 STT_OBJECT = 1, // Symbol is a data object (variable, array, etc.) 1163 STT_FUNC = 2, // Symbol is executable code (function, etc.) 1164 STT_SECTION = 3, // Symbol refers to a section 1165 STT_FILE = 4, // Local, absolute symbol that refers to a file 1166 STT_COMMON = 5, // An uninitialized common block 1167 STT_TLS = 6, // Thread local data object 1168 STT_GNU_IFUNC = 10, // GNU indirect function 1169 STT_LOOS = 10, // Lowest operating system-specific symbol type 1170 STT_HIOS = 12, // Highest operating system-specific symbol type 1171 STT_LOPROC = 13, // Lowest processor-specific symbol type 1172 STT_HIPROC = 15, // Highest processor-specific symbol type 1173 1174 // AMDGPU symbol types 1175 STT_AMDGPU_HSA_KERNEL = 10 1176 }; 1177 1178 enum { 1179 STV_DEFAULT = 0, // Visibility is specified by binding type 1180 STV_INTERNAL = 1, // Defined by processor supplements 1181 STV_HIDDEN = 2, // Not visible to other components 1182 STV_PROTECTED = 3 // Visible in other components but not preemptable 1183 }; 1184 1185 // Symbol number. 1186 enum { STN_UNDEF = 0 }; 1187 1188 // Special relocation symbols used in the MIPS64 ELF relocation entries 1189 enum { 1190 RSS_UNDEF = 0, // None 1191 RSS_GP = 1, // Value of gp 1192 RSS_GP0 = 2, // Value of gp used to create object being relocated 1193 RSS_LOC = 3 // Address of location being relocated 1194 }; 1195 1196 // Relocation entry, without explicit addend. 1197 struct Elf32_Rel { 1198 Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr) 1199 Elf32_Word r_info; // Symbol table index and type of relocation to apply 1200 1201 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE, 1202 // and ELF32_R_INFO macros defined in the ELF specification: 1203 Elf32_Word getSymbol() const { return (r_info >> 8); } 1204 unsigned char getType() const { return (unsigned char)(r_info & 0x0ff); } 1205 void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); } 1206 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); } 1207 void setSymbolAndType(Elf32_Word s, unsigned char t) { 1208 r_info = (s << 8) + t; 1209 } 1210 }; 1211 1212 // Relocation entry with explicit addend. 1213 struct Elf32_Rela { 1214 Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr) 1215 Elf32_Word r_info; // Symbol table index and type of relocation to apply 1216 Elf32_Sword r_addend; // Compute value for relocatable field by adding this 1217 1218 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE, 1219 // and ELF32_R_INFO macros defined in the ELF specification: 1220 Elf32_Word getSymbol() const { return (r_info >> 8); } 1221 unsigned char getType() const { return (unsigned char)(r_info & 0x0ff); } 1222 void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); } 1223 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); } 1224 void setSymbolAndType(Elf32_Word s, unsigned char t) { 1225 r_info = (s << 8) + t; 1226 } 1227 }; 1228 1229 // Relocation entry without explicit addend or info (relative relocations only). 1230 typedef Elf32_Word Elf32_Relr; // offset/bitmap for relative relocations 1231 1232 // Relocation entry, without explicit addend. 1233 struct Elf64_Rel { 1234 Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr). 1235 Elf64_Xword r_info; // Symbol table index and type of relocation to apply. 1236 1237 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE, 1238 // and ELF64_R_INFO macros defined in the ELF specification: 1239 Elf64_Word getSymbol() const { return (r_info >> 32); } 1240 Elf64_Word getType() const { return (Elf64_Word)(r_info & 0xffffffffL); } 1241 void setSymbol(Elf64_Word s) { setSymbolAndType(s, getType()); } 1242 void setType(Elf64_Word t) { setSymbolAndType(getSymbol(), t); } 1243 void setSymbolAndType(Elf64_Word s, Elf64_Word t) { 1244 r_info = ((Elf64_Xword)s << 32) + (t & 0xffffffffL); 1245 } 1246 }; 1247 1248 // Relocation entry with explicit addend. 1249 struct Elf64_Rela { 1250 Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr). 1251 Elf64_Xword r_info; // Symbol table index and type of relocation to apply. 1252 Elf64_Sxword r_addend; // Compute value for relocatable field by adding this. 1253 1254 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE, 1255 // and ELF64_R_INFO macros defined in the ELF specification: 1256 Elf64_Word getSymbol() const { return (r_info >> 32); } 1257 Elf64_Word getType() const { return (Elf64_Word)(r_info & 0xffffffffL); } 1258 void setSymbol(Elf64_Word s) { setSymbolAndType(s, getType()); } 1259 void setType(Elf64_Word t) { setSymbolAndType(getSymbol(), t); } 1260 void setSymbolAndType(Elf64_Word s, Elf64_Word t) { 1261 r_info = ((Elf64_Xword)s << 32) + (t & 0xffffffffL); 1262 } 1263 }; 1264 1265 // Relocation entry without explicit addend or info (relative relocations only). 1266 typedef Elf64_Xword Elf64_Relr; // offset/bitmap for relative relocations 1267 1268 // Program header for ELF32. 1269 struct Elf32_Phdr { 1270 Elf32_Word p_type; // Type of segment 1271 Elf32_Off p_offset; // File offset where segment is located, in bytes 1272 Elf32_Addr p_vaddr; // Virtual address of beginning of segment 1273 Elf32_Addr p_paddr; // Physical address of beginning of segment (OS-specific) 1274 Elf32_Word p_filesz; // Num. of bytes in file image of segment (may be zero) 1275 Elf32_Word p_memsz; // Num. of bytes in mem image of segment (may be zero) 1276 Elf32_Word p_flags; // Segment flags 1277 Elf32_Word p_align; // Segment alignment constraint 1278 }; 1279 1280 // Program header for ELF64. 1281 struct Elf64_Phdr { 1282 Elf64_Word p_type; // Type of segment 1283 Elf64_Word p_flags; // Segment flags 1284 Elf64_Off p_offset; // File offset where segment is located, in bytes 1285 Elf64_Addr p_vaddr; // Virtual address of beginning of segment 1286 Elf64_Addr p_paddr; // Physical addr of beginning of segment (OS-specific) 1287 Elf64_Xword p_filesz; // Num. of bytes in file image of segment (may be zero) 1288 Elf64_Xword p_memsz; // Num. of bytes in mem image of segment (may be zero) 1289 Elf64_Xword p_align; // Segment alignment constraint 1290 }; 1291 1292 // Segment types. 1293 enum { 1294 PT_NULL = 0, // Unused segment. 1295 PT_LOAD = 1, // Loadable segment. 1296 PT_DYNAMIC = 2, // Dynamic linking information. 1297 PT_INTERP = 3, // Interpreter pathname. 1298 PT_NOTE = 4, // Auxiliary information. 1299 PT_SHLIB = 5, // Reserved. 1300 PT_PHDR = 6, // The program header table itself. 1301 PT_TLS = 7, // The thread-local storage template. 1302 PT_LOOS = 0x60000000, // Lowest operating system-specific pt entry type. 1303 PT_HIOS = 0x6fffffff, // Highest operating system-specific pt entry type. 1304 PT_LOPROC = 0x70000000, // Lowest processor-specific program hdr entry type. 1305 PT_HIPROC = 0x7fffffff, // Highest processor-specific program hdr entry type. 1306 1307 // x86-64 program header types. 1308 // These all contain stack unwind tables. 1309 PT_GNU_EH_FRAME = 0x6474e550, 1310 PT_SUNW_EH_FRAME = 0x6474e550, 1311 PT_SUNW_UNWIND = 0x6464e550, 1312 1313 PT_GNU_STACK = 0x6474e551, // Indicates stack executability. 1314 PT_GNU_RELRO = 0x6474e552, // Read-only after relocation. 1315 PT_GNU_PROPERTY = 0x6474e553, // .note.gnu.property notes sections. 1316 1317 PT_OPENBSD_RANDOMIZE = 0x65a3dbe6, // Fill with random data. 1318 PT_OPENBSD_WXNEEDED = 0x65a3dbe7, // Program does W^X violations. 1319 PT_OPENBSD_BOOTDATA = 0x65a41be6, // Section for boot arguments. 1320 1321 // ARM program header types. 1322 PT_ARM_ARCHEXT = 0x70000000, // Platform architecture compatibility info 1323 // These all contain stack unwind tables. 1324 PT_ARM_EXIDX = 0x70000001, 1325 PT_ARM_UNWIND = 0x70000001, 1326 1327 // MIPS program header types. 1328 PT_MIPS_REGINFO = 0x70000000, // Register usage information. 1329 PT_MIPS_RTPROC = 0x70000001, // Runtime procedure table. 1330 PT_MIPS_OPTIONS = 0x70000002, // Options segment. 1331 PT_MIPS_ABIFLAGS = 0x70000003, // Abiflags segment. 1332 }; 1333 1334 // Segment flag bits. 1335 enum : unsigned { 1336 PF_X = 1, // Execute 1337 PF_W = 2, // Write 1338 PF_R = 4, // Read 1339 PF_MASKOS = 0x0ff00000, // Bits for operating system-specific semantics. 1340 PF_MASKPROC = 0xf0000000 // Bits for processor-specific semantics. 1341 }; 1342 1343 // Dynamic table entry for ELF32. 1344 struct Elf32_Dyn { 1345 Elf32_Sword d_tag; // Type of dynamic table entry. 1346 union { 1347 Elf32_Word d_val; // Integer value of entry. 1348 Elf32_Addr d_ptr; // Pointer value of entry. 1349 } d_un; 1350 }; 1351 1352 // Dynamic table entry for ELF64. 1353 struct Elf64_Dyn { 1354 Elf64_Sxword d_tag; // Type of dynamic table entry. 1355 union { 1356 Elf64_Xword d_val; // Integer value of entry. 1357 Elf64_Addr d_ptr; // Pointer value of entry. 1358 } d_un; 1359 }; 1360 1361 // Dynamic table entry tags. 1362 enum { 1363 #define DYNAMIC_TAG(name, value) DT_##name = value, 1364 #include "DynamicTags.def" 1365 #undef DYNAMIC_TAG 1366 }; 1367 1368 // DT_FLAGS values. 1369 enum { 1370 DF_ORIGIN = 0x01, // The object may reference $ORIGIN. 1371 DF_SYMBOLIC = 0x02, // Search the shared lib before searching the exe. 1372 DF_TEXTREL = 0x04, // Relocations may modify a non-writable segment. 1373 DF_BIND_NOW = 0x08, // Process all relocations on load. 1374 DF_STATIC_TLS = 0x10 // Reject attempts to load dynamically. 1375 }; 1376 1377 // State flags selectable in the `d_un.d_val' element of the DT_FLAGS_1 entry. 1378 enum { 1379 DF_1_NOW = 0x00000001, // Set RTLD_NOW for this object. 1380 DF_1_GLOBAL = 0x00000002, // Set RTLD_GLOBAL for this object. 1381 DF_1_GROUP = 0x00000004, // Set RTLD_GROUP for this object. 1382 DF_1_NODELETE = 0x00000008, // Set RTLD_NODELETE for this object. 1383 DF_1_LOADFLTR = 0x00000010, // Trigger filtee loading at runtime. 1384 DF_1_INITFIRST = 0x00000020, // Set RTLD_INITFIRST for this object. 1385 DF_1_NOOPEN = 0x00000040, // Set RTLD_NOOPEN for this object. 1386 DF_1_ORIGIN = 0x00000080, // $ORIGIN must be handled. 1387 DF_1_DIRECT = 0x00000100, // Direct binding enabled. 1388 DF_1_TRANS = 0x00000200, 1389 DF_1_INTERPOSE = 0x00000400, // Object is used to interpose. 1390 DF_1_NODEFLIB = 0x00000800, // Ignore default lib search path. 1391 DF_1_NODUMP = 0x00001000, // Object can't be dldump'ed. 1392 DF_1_CONFALT = 0x00002000, // Configuration alternative created. 1393 DF_1_ENDFILTEE = 0x00004000, // Filtee terminates filters search. 1394 DF_1_DISPRELDNE = 0x00008000, // Disp reloc applied at build time. 1395 DF_1_DISPRELPND = 0x00010000, // Disp reloc applied at run-time. 1396 DF_1_NODIRECT = 0x00020000, // Object has no-direct binding. 1397 DF_1_IGNMULDEF = 0x00040000, 1398 DF_1_NOKSYMS = 0x00080000, 1399 DF_1_NOHDR = 0x00100000, 1400 DF_1_EDITED = 0x00200000, // Object is modified after built. 1401 DF_1_NORELOC = 0x00400000, 1402 DF_1_SYMINTPOSE = 0x00800000, // Object has individual interposers. 1403 DF_1_GLOBAUDIT = 0x01000000, // Global auditing required. 1404 DF_1_SINGLETON = 0x02000000, // Singleton symbols are used. 1405 DF_1_PIE = 0x08000000, // Object is a position-independent executable. 1406 }; 1407 1408 // DT_MIPS_FLAGS values. 1409 enum { 1410 RHF_NONE = 0x00000000, // No flags. 1411 RHF_QUICKSTART = 0x00000001, // Uses shortcut pointers. 1412 RHF_NOTPOT = 0x00000002, // Hash size is not a power of two. 1413 RHS_NO_LIBRARY_REPLACEMENT = 0x00000004, // Ignore LD_LIBRARY_PATH. 1414 RHF_NO_MOVE = 0x00000008, // DSO address may not be relocated. 1415 RHF_SGI_ONLY = 0x00000010, // SGI specific features. 1416 RHF_GUARANTEE_INIT = 0x00000020, // Guarantee that .init will finish 1417 // executing before any non-init 1418 // code in DSO is called. 1419 RHF_DELTA_C_PLUS_PLUS = 0x00000040, // Contains Delta C++ code. 1420 RHF_GUARANTEE_START_INIT = 0x00000080, // Guarantee that .init will start 1421 // executing before any non-init 1422 // code in DSO is called. 1423 RHF_PIXIE = 0x00000100, // Generated by pixie. 1424 RHF_DEFAULT_DELAY_LOAD = 0x00000200, // Delay-load DSO by default. 1425 RHF_REQUICKSTART = 0x00000400, // Object may be requickstarted 1426 RHF_REQUICKSTARTED = 0x00000800, // Object has been requickstarted 1427 RHF_CORD = 0x00001000, // Generated by cord. 1428 RHF_NO_UNRES_UNDEF = 0x00002000, // Object contains no unresolved 1429 // undef symbols. 1430 RHF_RLD_ORDER_SAFE = 0x00004000 // Symbol table is in a safe order. 1431 }; 1432 1433 // ElfXX_VerDef structure version (GNU versioning) 1434 enum { VER_DEF_NONE = 0, VER_DEF_CURRENT = 1 }; 1435 1436 // VerDef Flags (ElfXX_VerDef::vd_flags) 1437 enum { VER_FLG_BASE = 0x1, VER_FLG_WEAK = 0x2, VER_FLG_INFO = 0x4 }; 1438 1439 // Special constants for the version table. (SHT_GNU_versym/.gnu.version) 1440 enum { 1441 VER_NDX_LOCAL = 0, // Unversioned local symbol 1442 VER_NDX_GLOBAL = 1, // Unversioned global symbol 1443 VERSYM_VERSION = 0x7fff, // Version Index mask 1444 VERSYM_HIDDEN = 0x8000 // Hidden bit (non-default version) 1445 }; 1446 1447 // ElfXX_VerNeed structure version (GNU versioning) 1448 enum { VER_NEED_NONE = 0, VER_NEED_CURRENT = 1 }; 1449 1450 // SHT_NOTE section types. 1451 1452 // Generic note types. 1453 enum : unsigned { 1454 NT_VERSION = 1, 1455 NT_ARCH = 2, 1456 NT_GNU_BUILD_ATTRIBUTE_OPEN = 0x100, 1457 NT_GNU_BUILD_ATTRIBUTE_FUNC = 0x101, 1458 }; 1459 1460 // Core note types. 1461 enum : unsigned { 1462 NT_PRSTATUS = 1, 1463 NT_FPREGSET = 2, 1464 NT_PRPSINFO = 3, 1465 NT_TASKSTRUCT = 4, 1466 NT_AUXV = 6, 1467 NT_PSTATUS = 10, 1468 NT_FPREGS = 12, 1469 NT_PSINFO = 13, 1470 NT_LWPSTATUS = 16, 1471 NT_LWPSINFO = 17, 1472 NT_WIN32PSTATUS = 18, 1473 1474 NT_PPC_VMX = 0x100, 1475 NT_PPC_VSX = 0x102, 1476 NT_PPC_TAR = 0x103, 1477 NT_PPC_PPR = 0x104, 1478 NT_PPC_DSCR = 0x105, 1479 NT_PPC_EBB = 0x106, 1480 NT_PPC_PMU = 0x107, 1481 NT_PPC_TM_CGPR = 0x108, 1482 NT_PPC_TM_CFPR = 0x109, 1483 NT_PPC_TM_CVMX = 0x10a, 1484 NT_PPC_TM_CVSX = 0x10b, 1485 NT_PPC_TM_SPR = 0x10c, 1486 NT_PPC_TM_CTAR = 0x10d, 1487 NT_PPC_TM_CPPR = 0x10e, 1488 NT_PPC_TM_CDSCR = 0x10f, 1489 1490 NT_386_TLS = 0x200, 1491 NT_386_IOPERM = 0x201, 1492 NT_X86_XSTATE = 0x202, 1493 1494 NT_S390_HIGH_GPRS = 0x300, 1495 NT_S390_TIMER = 0x301, 1496 NT_S390_TODCMP = 0x302, 1497 NT_S390_TODPREG = 0x303, 1498 NT_S390_CTRS = 0x304, 1499 NT_S390_PREFIX = 0x305, 1500 NT_S390_LAST_BREAK = 0x306, 1501 NT_S390_SYSTEM_CALL = 0x307, 1502 NT_S390_TDB = 0x308, 1503 NT_S390_VXRS_LOW = 0x309, 1504 NT_S390_VXRS_HIGH = 0x30a, 1505 NT_S390_GS_CB = 0x30b, 1506 NT_S390_GS_BC = 0x30c, 1507 1508 NT_ARM_VFP = 0x400, 1509 NT_ARM_TLS = 0x401, 1510 NT_ARM_HW_BREAK = 0x402, 1511 NT_ARM_HW_WATCH = 0x403, 1512 NT_ARM_SVE = 0x405, 1513 NT_ARM_PAC_MASK = 0x406, 1514 1515 NT_FILE = 0x46494c45, 1516 NT_PRXFPREG = 0x46e62b7f, 1517 NT_SIGINFO = 0x53494749, 1518 }; 1519 1520 // LLVM-specific notes. 1521 enum { 1522 NT_LLVM_HWASAN_GLOBALS = 3, 1523 }; 1524 1525 // GNU note types. 1526 enum { 1527 NT_GNU_ABI_TAG = 1, 1528 NT_GNU_HWCAP = 2, 1529 NT_GNU_BUILD_ID = 3, 1530 NT_GNU_GOLD_VERSION = 4, 1531 NT_GNU_PROPERTY_TYPE_0 = 5, 1532 }; 1533 1534 // Property types used in GNU_PROPERTY_TYPE_0 notes. 1535 enum : unsigned { 1536 GNU_PROPERTY_STACK_SIZE = 1, 1537 GNU_PROPERTY_NO_COPY_ON_PROTECTED = 2, 1538 GNU_PROPERTY_AARCH64_FEATURE_1_AND = 0xc0000000, 1539 GNU_PROPERTY_X86_FEATURE_1_AND = 0xc0000002, 1540 1541 GNU_PROPERTY_X86_UINT32_OR_LO = 0xc0008000, 1542 GNU_PROPERTY_X86_FEATURE_2_NEEDED = GNU_PROPERTY_X86_UINT32_OR_LO + 1, 1543 GNU_PROPERTY_X86_ISA_1_NEEDED = GNU_PROPERTY_X86_UINT32_OR_LO + 2, 1544 1545 GNU_PROPERTY_X86_UINT32_OR_AND_LO = 0xc0010000, 1546 GNU_PROPERTY_X86_FEATURE_2_USED = GNU_PROPERTY_X86_UINT32_OR_AND_LO + 1, 1547 GNU_PROPERTY_X86_ISA_1_USED = GNU_PROPERTY_X86_UINT32_OR_AND_LO + 2, 1548 }; 1549 1550 // aarch64 processor feature bits. 1551 enum : unsigned { 1552 GNU_PROPERTY_AARCH64_FEATURE_1_BTI = 1 << 0, 1553 GNU_PROPERTY_AARCH64_FEATURE_1_PAC = 1 << 1, 1554 }; 1555 1556 // x86 processor feature bits. 1557 enum : unsigned { 1558 GNU_PROPERTY_X86_FEATURE_1_IBT = 1 << 0, 1559 GNU_PROPERTY_X86_FEATURE_1_SHSTK = 1 << 1, 1560 1561 GNU_PROPERTY_X86_FEATURE_2_X86 = 1 << 0, 1562 GNU_PROPERTY_X86_FEATURE_2_X87 = 1 << 1, 1563 GNU_PROPERTY_X86_FEATURE_2_MMX = 1 << 2, 1564 GNU_PROPERTY_X86_FEATURE_2_XMM = 1 << 3, 1565 GNU_PROPERTY_X86_FEATURE_2_YMM = 1 << 4, 1566 GNU_PROPERTY_X86_FEATURE_2_ZMM = 1 << 5, 1567 GNU_PROPERTY_X86_FEATURE_2_FXSR = 1 << 6, 1568 GNU_PROPERTY_X86_FEATURE_2_XSAVE = 1 << 7, 1569 GNU_PROPERTY_X86_FEATURE_2_XSAVEOPT = 1 << 8, 1570 GNU_PROPERTY_X86_FEATURE_2_XSAVEC = 1 << 9, 1571 1572 GNU_PROPERTY_X86_ISA_1_BASELINE = 1 << 0, 1573 GNU_PROPERTY_X86_ISA_1_V2 = 1 << 1, 1574 GNU_PROPERTY_X86_ISA_1_V3 = 1 << 2, 1575 GNU_PROPERTY_X86_ISA_1_V4 = 1 << 3, 1576 }; 1577 1578 // FreeBSD note types. 1579 enum { 1580 NT_FREEBSD_ABI_TAG = 1, 1581 NT_FREEBSD_NOINIT_TAG = 2, 1582 NT_FREEBSD_ARCH_TAG = 3, 1583 NT_FREEBSD_FEATURE_CTL = 4, 1584 }; 1585 1586 // NT_FREEBSD_FEATURE_CTL values (see FreeBSD's sys/sys/elf_common.h). 1587 enum { 1588 NT_FREEBSD_FCTL_ASLR_DISABLE = 0x00000001, 1589 NT_FREEBSD_FCTL_PROTMAX_DISABLE = 0x00000002, 1590 NT_FREEBSD_FCTL_STKGAP_DISABLE = 0x00000004, 1591 NT_FREEBSD_FCTL_WXNEEDED = 0x00000008, 1592 NT_FREEBSD_FCTL_LA48 = 0x00000010, 1593 NT_FREEBSD_FCTL_ASG_DISABLE = 0x00000020, 1594 }; 1595 1596 // FreeBSD core note types. 1597 enum { 1598 NT_FREEBSD_THRMISC = 7, 1599 NT_FREEBSD_PROCSTAT_PROC = 8, 1600 NT_FREEBSD_PROCSTAT_FILES = 9, 1601 NT_FREEBSD_PROCSTAT_VMMAP = 10, 1602 NT_FREEBSD_PROCSTAT_GROUPS = 11, 1603 NT_FREEBSD_PROCSTAT_UMASK = 12, 1604 NT_FREEBSD_PROCSTAT_RLIMIT = 13, 1605 NT_FREEBSD_PROCSTAT_OSREL = 14, 1606 NT_FREEBSD_PROCSTAT_PSSTRINGS = 15, 1607 NT_FREEBSD_PROCSTAT_AUXV = 16, 1608 }; 1609 1610 // NetBSD core note types. 1611 enum { 1612 NT_NETBSDCORE_PROCINFO = 1, 1613 NT_NETBSDCORE_AUXV = 2, 1614 NT_NETBSDCORE_LWPSTATUS = 24, 1615 }; 1616 1617 // OpenBSD core note types. 1618 enum { 1619 NT_OPENBSD_PROCINFO = 10, 1620 NT_OPENBSD_AUXV = 11, 1621 NT_OPENBSD_REGS = 20, 1622 NT_OPENBSD_FPREGS = 21, 1623 NT_OPENBSD_XFPREGS = 22, 1624 NT_OPENBSD_WCOOKIE = 23, 1625 }; 1626 1627 // AMDGPU-specific section indices. 1628 enum { 1629 SHN_AMDGPU_LDS = 0xff00, // Variable in LDS; symbol encoded like SHN_COMMON 1630 }; 1631 1632 // AMD vendor specific notes. (Code Object V2) 1633 enum { 1634 NT_AMD_HSA_CODE_OBJECT_VERSION = 1, 1635 NT_AMD_HSA_HSAIL = 2, 1636 NT_AMD_HSA_ISA_VERSION = 3, 1637 // Note types with values between 4 and 9 (inclusive) are reserved. 1638 NT_AMD_HSA_METADATA = 10, 1639 NT_AMD_HSA_ISA_NAME = 11, 1640 NT_AMD_PAL_METADATA = 12 1641 }; 1642 1643 // AMDGPU vendor specific notes. (Code Object V3) 1644 enum { 1645 // Note types with values between 0 and 31 (inclusive) are reserved. 1646 NT_AMDGPU_METADATA = 32 1647 }; 1648 1649 // LLVMOMPOFFLOAD specific notes. 1650 enum : unsigned { 1651 NT_LLVM_OPENMP_OFFLOAD_VERSION = 1, 1652 NT_LLVM_OPENMP_OFFLOAD_PRODUCER = 2, 1653 NT_LLVM_OPENMP_OFFLOAD_PRODUCER_VERSION = 3 1654 }; 1655 1656 enum { 1657 GNU_ABI_TAG_LINUX = 0, 1658 GNU_ABI_TAG_HURD = 1, 1659 GNU_ABI_TAG_SOLARIS = 2, 1660 GNU_ABI_TAG_FREEBSD = 3, 1661 GNU_ABI_TAG_NETBSD = 4, 1662 GNU_ABI_TAG_SYLLABLE = 5, 1663 GNU_ABI_TAG_NACL = 6, 1664 }; 1665 1666 constexpr const char *ELF_NOTE_GNU = "GNU"; 1667 1668 // Android packed relocation group flags. 1669 enum { 1670 RELOCATION_GROUPED_BY_INFO_FLAG = 1, 1671 RELOCATION_GROUPED_BY_OFFSET_DELTA_FLAG = 2, 1672 RELOCATION_GROUPED_BY_ADDEND_FLAG = 4, 1673 RELOCATION_GROUP_HAS_ADDEND_FLAG = 8, 1674 }; 1675 1676 // Compressed section header for ELF32. 1677 struct Elf32_Chdr { 1678 Elf32_Word ch_type; 1679 Elf32_Word ch_size; 1680 Elf32_Word ch_addralign; 1681 }; 1682 1683 // Compressed section header for ELF64. 1684 struct Elf64_Chdr { 1685 Elf64_Word ch_type; 1686 Elf64_Word ch_reserved; 1687 Elf64_Xword ch_size; 1688 Elf64_Xword ch_addralign; 1689 }; 1690 1691 // Note header for ELF32. 1692 struct Elf32_Nhdr { 1693 Elf32_Word n_namesz; 1694 Elf32_Word n_descsz; 1695 Elf32_Word n_type; 1696 }; 1697 1698 // Note header for ELF64. 1699 struct Elf64_Nhdr { 1700 Elf64_Word n_namesz; 1701 Elf64_Word n_descsz; 1702 Elf64_Word n_type; 1703 }; 1704 1705 // Legal values for ch_type field of compressed section header. 1706 enum { 1707 ELFCOMPRESS_ZLIB = 1, // ZLIB/DEFLATE algorithm. 1708 ELFCOMPRESS_LOOS = 0x60000000, // Start of OS-specific. 1709 ELFCOMPRESS_HIOS = 0x6fffffff, // End of OS-specific. 1710 ELFCOMPRESS_LOPROC = 0x70000000, // Start of processor-specific. 1711 ELFCOMPRESS_HIPROC = 0x7fffffff // End of processor-specific. 1712 }; 1713 1714 /// Convert an architecture name into ELF's e_machine value. 1715 uint16_t convertArchNameToEMachine(StringRef Arch); 1716 1717 /// Convert an ELF's e_machine value into an architecture name. 1718 StringRef convertEMachineToArchName(uint16_t EMachine); 1719 1720 } // end namespace ELF 1721 } // end namespace llvm 1722 1723 #endif // LLVM_BINARYFORMAT_ELF_H 1724