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 #include <string> 26 27 namespace llvm { 28 namespace ELF { 29 30 using Elf32_Addr = uint32_t; // Program address 31 using Elf32_Off = uint32_t; // File offset 32 using Elf32_Half = uint16_t; 33 using Elf32_Word = uint32_t; 34 using Elf32_Sword = int32_t; 35 36 using Elf64_Addr = uint64_t; 37 using Elf64_Off = uint64_t; 38 using Elf64_Half = uint16_t; 39 using Elf64_Word = uint32_t; 40 using Elf64_Sword = int32_t; 41 using Elf64_Xword = uint64_t; 42 using Elf64_Sxword = int64_t; 43 44 // Object file magic string. 45 static const char ElfMagic[] = {0x7f, 'E', 'L', 'F', '\0'}; 46 47 // e_ident size and indices. 48 enum { 49 EI_MAG0 = 0, // File identification index. 50 EI_MAG1 = 1, // File identification index. 51 EI_MAG2 = 2, // File identification index. 52 EI_MAG3 = 3, // File identification index. 53 EI_CLASS = 4, // File class. 54 EI_DATA = 5, // Data encoding. 55 EI_VERSION = 6, // File version. 56 EI_OSABI = 7, // OS/ABI identification. 57 EI_ABIVERSION = 8, // ABI version. 58 EI_PAD = 9, // Start of padding bytes. 59 EI_NIDENT = 16 // Number of bytes in e_ident. 60 }; 61 62 struct Elf32_Ehdr { 63 unsigned char e_ident[EI_NIDENT]; // ELF Identification bytes 64 Elf32_Half e_type; // Type of file (see ET_* below) 65 Elf32_Half e_machine; // Required architecture for this file (see EM_*) 66 Elf32_Word e_version; // Must be equal to 1 67 Elf32_Addr e_entry; // Address to jump to in order to start program 68 Elf32_Off e_phoff; // Program header table's file offset, in bytes 69 Elf32_Off e_shoff; // Section header table's file offset, in bytes 70 Elf32_Word e_flags; // Processor-specific flags 71 Elf32_Half e_ehsize; // Size of ELF header, in bytes 72 Elf32_Half e_phentsize; // Size of an entry in the program header table 73 Elf32_Half e_phnum; // Number of entries in the program header table 74 Elf32_Half e_shentsize; // Size of an entry in the section header table 75 Elf32_Half e_shnum; // Number of entries in the section header table 76 Elf32_Half e_shstrndx; // Sect hdr table index of sect name string table 77 78 bool checkMagic() const { 79 return (memcmp(e_ident, ElfMagic, strlen(ElfMagic))) == 0; 80 } 81 82 unsigned char getFileClass() const { return e_ident[EI_CLASS]; } 83 unsigned char getDataEncoding() const { return e_ident[EI_DATA]; } 84 }; 85 86 // 64-bit ELF header. Fields are the same as for ELF32, but with different 87 // types (see above). 88 struct Elf64_Ehdr { 89 unsigned char e_ident[EI_NIDENT]; 90 Elf64_Half e_type; 91 Elf64_Half e_machine; 92 Elf64_Word e_version; 93 Elf64_Addr e_entry; 94 Elf64_Off e_phoff; 95 Elf64_Off e_shoff; 96 Elf64_Word e_flags; 97 Elf64_Half e_ehsize; 98 Elf64_Half e_phentsize; 99 Elf64_Half e_phnum; 100 Elf64_Half e_shentsize; 101 Elf64_Half e_shnum; 102 Elf64_Half e_shstrndx; 103 104 bool checkMagic() const { 105 return (memcmp(e_ident, ElfMagic, strlen(ElfMagic))) == 0; 106 } 107 108 unsigned char getFileClass() const { return e_ident[EI_CLASS]; } 109 unsigned char getDataEncoding() const { return e_ident[EI_DATA]; } 110 }; 111 112 // File types. 113 // See current registered ELF types at: 114 // http://www.sco.com/developers/gabi/latest/ch4.eheader.html 115 enum { 116 ET_NONE = 0, // No file type 117 ET_REL = 1, // Relocatable file 118 ET_EXEC = 2, // Executable file 119 ET_DYN = 3, // Shared object file 120 ET_CORE = 4, // Core file 121 ET_LOOS = 0xfe00, // Beginning of operating system-specific codes 122 ET_HIOS = 0xfeff, // Operating system-specific 123 ET_LOPROC = 0xff00, // Beginning of processor-specific codes 124 ET_HIPROC = 0xffff // Processor-specific 125 }; 126 127 // Versioning 128 enum { EV_NONE = 0, EV_CURRENT = 1 }; 129 130 // Machine architectures 131 // See current registered ELF machine architectures at: 132 // http://www.uxsglobal.com/developers/gabi/latest/ch4.eheader.html 133 enum { 134 EM_NONE = 0, // No machine 135 EM_M32 = 1, // AT&T WE 32100 136 EM_SPARC = 2, // SPARC 137 EM_386 = 3, // Intel 386 138 EM_68K = 4, // Motorola 68000 139 EM_88K = 5, // Motorola 88000 140 EM_IAMCU = 6, // Intel MCU 141 EM_860 = 7, // Intel 80860 142 EM_MIPS = 8, // MIPS R3000 143 EM_S370 = 9, // IBM System/370 144 EM_MIPS_RS3_LE = 10, // MIPS RS3000 Little-endian 145 EM_PARISC = 15, // Hewlett-Packard PA-RISC 146 EM_VPP500 = 17, // Fujitsu VPP500 147 EM_SPARC32PLUS = 18, // Enhanced instruction set SPARC 148 EM_960 = 19, // Intel 80960 149 EM_PPC = 20, // PowerPC 150 EM_PPC64 = 21, // PowerPC64 151 EM_S390 = 22, // IBM System/390 152 EM_SPU = 23, // IBM SPU/SPC 153 EM_V800 = 36, // NEC V800 154 EM_FR20 = 37, // Fujitsu FR20 155 EM_RH32 = 38, // TRW RH-32 156 EM_RCE = 39, // Motorola RCE 157 EM_ARM = 40, // ARM 158 EM_ALPHA = 41, // DEC Alpha 159 EM_SH = 42, // Hitachi SH 160 EM_SPARCV9 = 43, // SPARC V9 161 EM_TRICORE = 44, // Siemens TriCore 162 EM_ARC = 45, // Argonaut RISC Core 163 EM_H8_300 = 46, // Hitachi H8/300 164 EM_H8_300H = 47, // Hitachi H8/300H 165 EM_H8S = 48, // Hitachi H8S 166 EM_H8_500 = 49, // Hitachi H8/500 167 EM_IA_64 = 50, // Intel IA-64 processor architecture 168 EM_MIPS_X = 51, // Stanford MIPS-X 169 EM_COLDFIRE = 52, // Motorola ColdFire 170 EM_68HC12 = 53, // Motorola M68HC12 171 EM_MMA = 54, // Fujitsu MMA Multimedia Accelerator 172 EM_PCP = 55, // Siemens PCP 173 EM_NCPU = 56, // Sony nCPU embedded RISC processor 174 EM_NDR1 = 57, // Denso NDR1 microprocessor 175 EM_STARCORE = 58, // Motorola Star*Core processor 176 EM_ME16 = 59, // Toyota ME16 processor 177 EM_ST100 = 60, // STMicroelectronics ST100 processor 178 EM_TINYJ = 61, // Advanced Logic Corp. TinyJ embedded processor family 179 EM_X86_64 = 62, // AMD x86-64 architecture 180 EM_PDSP = 63, // Sony DSP Processor 181 EM_PDP10 = 64, // Digital Equipment Corp. PDP-10 182 EM_PDP11 = 65, // Digital Equipment Corp. PDP-11 183 EM_FX66 = 66, // Siemens FX66 microcontroller 184 EM_ST9PLUS = 67, // STMicroelectronics ST9+ 8/16 bit microcontroller 185 EM_ST7 = 68, // STMicroelectronics ST7 8-bit microcontroller 186 EM_68HC16 = 69, // Motorola MC68HC16 Microcontroller 187 EM_68HC11 = 70, // Motorola MC68HC11 Microcontroller 188 EM_68HC08 = 71, // Motorola MC68HC08 Microcontroller 189 EM_68HC05 = 72, // Motorola MC68HC05 Microcontroller 190 EM_SVX = 73, // Silicon Graphics SVx 191 EM_ST19 = 74, // STMicroelectronics ST19 8-bit microcontroller 192 EM_VAX = 75, // Digital VAX 193 EM_CRIS = 76, // Axis Communications 32-bit embedded processor 194 EM_JAVELIN = 77, // Infineon Technologies 32-bit embedded processor 195 EM_FIREPATH = 78, // Element 14 64-bit DSP Processor 196 EM_ZSP = 79, // LSI Logic 16-bit DSP Processor 197 EM_MMIX = 80, // Donald Knuth's educational 64-bit processor 198 EM_HUANY = 81, // Harvard University machine-independent object files 199 EM_PRISM = 82, // SiTera Prism 200 EM_AVR = 83, // Atmel AVR 8-bit microcontroller 201 EM_FR30 = 84, // Fujitsu FR30 202 EM_D10V = 85, // Mitsubishi D10V 203 EM_D30V = 86, // Mitsubishi D30V 204 EM_V850 = 87, // NEC v850 205 EM_M32R = 88, // Mitsubishi M32R 206 EM_MN10300 = 89, // Matsushita MN10300 207 EM_MN10200 = 90, // Matsushita MN10200 208 EM_PJ = 91, // picoJava 209 EM_OPENRISC = 92, // OpenRISC 32-bit embedded processor 210 EM_ARC_COMPACT = 93, // ARC International ARCompact processor (old 211 // spelling/synonym: EM_ARC_A5) 212 EM_XTENSA = 94, // Tensilica Xtensa Architecture 213 EM_VIDEOCORE = 95, // Alphamosaic VideoCore processor 214 EM_TMM_GPP = 96, // Thompson Multimedia General Purpose Processor 215 EM_NS32K = 97, // National Semiconductor 32000 series 216 EM_TPC = 98, // Tenor Network TPC processor 217 EM_SNP1K = 99, // Trebia SNP 1000 processor 218 EM_ST200 = 100, // STMicroelectronics (www.st.com) ST200 219 EM_IP2K = 101, // Ubicom IP2xxx microcontroller family 220 EM_MAX = 102, // MAX Processor 221 EM_CR = 103, // National Semiconductor CompactRISC microprocessor 222 EM_F2MC16 = 104, // Fujitsu F2MC16 223 EM_MSP430 = 105, // Texas Instruments embedded microcontroller msp430 224 EM_BLACKFIN = 106, // Analog Devices Blackfin (DSP) processor 225 EM_SE_C33 = 107, // S1C33 Family of Seiko Epson processors 226 EM_SEP = 108, // Sharp embedded microprocessor 227 EM_ARCA = 109, // Arca RISC Microprocessor 228 EM_UNICORE = 110, // Microprocessor series from PKU-Unity Ltd. and MPRC 229 // of Peking University 230 EM_EXCESS = 111, // eXcess: 16/32/64-bit configurable embedded CPU 231 EM_DXP = 112, // Icera Semiconductor Inc. Deep Execution Processor 232 EM_ALTERA_NIOS2 = 113, // Altera Nios II soft-core processor 233 EM_CRX = 114, // National Semiconductor CompactRISC CRX 234 EM_XGATE = 115, // Motorola XGATE embedded processor 235 EM_C166 = 116, // Infineon C16x/XC16x processor 236 EM_M16C = 117, // Renesas M16C series microprocessors 237 EM_DSPIC30F = 118, // Microchip Technology dsPIC30F Digital Signal 238 // Controller 239 EM_CE = 119, // Freescale Communication Engine RISC core 240 EM_M32C = 120, // Renesas M32C series microprocessors 241 EM_TSK3000 = 131, // Altium TSK3000 core 242 EM_RS08 = 132, // Freescale RS08 embedded processor 243 EM_SHARC = 133, // Analog Devices SHARC family of 32-bit DSP 244 // processors 245 EM_ECOG2 = 134, // Cyan Technology eCOG2 microprocessor 246 EM_SCORE7 = 135, // Sunplus S+core7 RISC processor 247 EM_DSP24 = 136, // New Japan Radio (NJR) 24-bit DSP Processor 248 EM_VIDEOCORE3 = 137, // Broadcom VideoCore III processor 249 EM_LATTICEMICO32 = 138, // RISC processor for Lattice FPGA architecture 250 EM_SE_C17 = 139, // Seiko Epson C17 family 251 EM_TI_C6000 = 140, // The Texas Instruments TMS320C6000 DSP family 252 EM_TI_C2000 = 141, // The Texas Instruments TMS320C2000 DSP family 253 EM_TI_C5500 = 142, // The Texas Instruments TMS320C55x DSP family 254 EM_MMDSP_PLUS = 160, // STMicroelectronics 64bit VLIW Data Signal Processor 255 EM_CYPRESS_M8C = 161, // Cypress M8C microprocessor 256 EM_R32C = 162, // Renesas R32C series microprocessors 257 EM_TRIMEDIA = 163, // NXP Semiconductors TriMedia architecture family 258 EM_HEXAGON = 164, // Qualcomm Hexagon processor 259 EM_8051 = 165, // Intel 8051 and variants 260 EM_STXP7X = 166, // STMicroelectronics STxP7x family of configurable 261 // and extensible RISC processors 262 EM_NDS32 = 167, // Andes Technology compact code size embedded RISC 263 // processor family 264 EM_ECOG1 = 168, // Cyan Technology eCOG1X family 265 EM_ECOG1X = 168, // Cyan Technology eCOG1X family 266 EM_MAXQ30 = 169, // Dallas Semiconductor MAXQ30 Core Micro-controllers 267 EM_XIMO16 = 170, // New Japan Radio (NJR) 16-bit DSP Processor 268 EM_MANIK = 171, // M2000 Reconfigurable RISC Microprocessor 269 EM_CRAYNV2 = 172, // Cray Inc. NV2 vector architecture 270 EM_RX = 173, // Renesas RX family 271 EM_METAG = 174, // Imagination Technologies META processor 272 // architecture 273 EM_MCST_ELBRUS = 175, // MCST Elbrus general purpose hardware architecture 274 EM_ECOG16 = 176, // Cyan Technology eCOG16 family 275 EM_CR16 = 177, // National Semiconductor CompactRISC CR16 16-bit 276 // microprocessor 277 EM_ETPU = 178, // Freescale Extended Time Processing Unit 278 EM_SLE9X = 179, // Infineon Technologies SLE9X core 279 EM_L10M = 180, // Intel L10M 280 EM_K10M = 181, // Intel K10M 281 EM_AARCH64 = 183, // ARM AArch64 282 EM_AVR32 = 185, // Atmel Corporation 32-bit microprocessor family 283 EM_STM8 = 186, // STMicroeletronics STM8 8-bit microcontroller 284 EM_TILE64 = 187, // Tilera TILE64 multicore architecture family 285 EM_TILEPRO = 188, // Tilera TILEPro multicore architecture family 286 EM_MICROBLAZE = 189, // Xilinx MicroBlaze 32-bit RISC soft processor core 287 EM_CUDA = 190, // NVIDIA CUDA architecture 288 EM_TILEGX = 191, // Tilera TILE-Gx multicore architecture family 289 EM_CLOUDSHIELD = 192, // CloudShield architecture family 290 EM_COREA_1ST = 193, // KIPO-KAIST Core-A 1st generation processor family 291 EM_COREA_2ND = 194, // KIPO-KAIST Core-A 2nd generation processor family 292 EM_ARC_COMPACT2 = 195, // Synopsys ARCompact V2 293 EM_OPEN8 = 196, // Open8 8-bit RISC soft processor core 294 EM_RL78 = 197, // Renesas RL78 family 295 EM_VIDEOCORE5 = 198, // Broadcom VideoCore V processor 296 EM_78KOR = 199, // Renesas 78KOR family 297 EM_56800EX = 200, // Freescale 56800EX Digital Signal Controller (DSC) 298 EM_BA1 = 201, // Beyond BA1 CPU architecture 299 EM_BA2 = 202, // Beyond BA2 CPU architecture 300 EM_XCORE = 203, // XMOS xCORE processor family 301 EM_MCHP_PIC = 204, // Microchip 8-bit PIC(r) family 302 EM_INTEL205 = 205, // Reserved by Intel 303 EM_INTEL206 = 206, // Reserved by Intel 304 EM_INTEL207 = 207, // Reserved by Intel 305 EM_INTEL208 = 208, // Reserved by Intel 306 EM_INTEL209 = 209, // Reserved by Intel 307 EM_KM32 = 210, // KM211 KM32 32-bit processor 308 EM_KMX32 = 211, // KM211 KMX32 32-bit processor 309 EM_KMX16 = 212, // KM211 KMX16 16-bit processor 310 EM_KMX8 = 213, // KM211 KMX8 8-bit processor 311 EM_KVARC = 214, // KM211 KVARC processor 312 EM_CDP = 215, // Paneve CDP architecture family 313 EM_COGE = 216, // Cognitive Smart Memory Processor 314 EM_COOL = 217, // iCelero CoolEngine 315 EM_NORC = 218, // Nanoradio Optimized RISC 316 EM_CSR_KALIMBA = 219, // CSR Kalimba architecture family 317 EM_AMDGPU = 224, // AMD GPU architecture 318 EM_RISCV = 243, // RISC-V 319 EM_LANAI = 244, // Lanai 32-bit processor 320 EM_BPF = 247, // Linux kernel bpf virtual machine 321 EM_VE = 251, // NEC SX-Aurora VE 322 EM_CSKY = 252, // C-SKY 32-bit processor 323 }; 324 325 // Object file classes. 326 enum { 327 ELFCLASSNONE = 0, 328 ELFCLASS32 = 1, // 32-bit object file 329 ELFCLASS64 = 2 // 64-bit object file 330 }; 331 332 // Object file byte orderings. 333 enum { 334 ELFDATANONE = 0, // Invalid data encoding. 335 ELFDATA2LSB = 1, // Little-endian object file 336 ELFDATA2MSB = 2 // Big-endian object file 337 }; 338 339 // OS ABI identification. 340 enum { 341 ELFOSABI_NONE = 0, // UNIX System V ABI 342 ELFOSABI_HPUX = 1, // HP-UX operating system 343 ELFOSABI_NETBSD = 2, // NetBSD 344 ELFOSABI_GNU = 3, // GNU/Linux 345 ELFOSABI_LINUX = 3, // Historical alias for ELFOSABI_GNU. 346 ELFOSABI_HURD = 4, // GNU/Hurd 347 ELFOSABI_SOLARIS = 6, // Solaris 348 ELFOSABI_AIX = 7, // AIX 349 ELFOSABI_IRIX = 8, // IRIX 350 ELFOSABI_FREEBSD = 9, // FreeBSD 351 ELFOSABI_TRU64 = 10, // TRU64 UNIX 352 ELFOSABI_MODESTO = 11, // Novell Modesto 353 ELFOSABI_OPENBSD = 12, // OpenBSD 354 ELFOSABI_OPENVMS = 13, // OpenVMS 355 ELFOSABI_NSK = 14, // Hewlett-Packard Non-Stop Kernel 356 ELFOSABI_AROS = 15, // AROS 357 ELFOSABI_FENIXOS = 16, // FenixOS 358 ELFOSABI_CLOUDABI = 17, // Nuxi CloudABI 359 ELFOSABI_FIRST_ARCH = 64, // First architecture-specific OS ABI 360 ELFOSABI_AMDGPU_HSA = 64, // AMD HSA runtime 361 ELFOSABI_AMDGPU_PAL = 65, // AMD PAL runtime 362 ELFOSABI_AMDGPU_MESA3D = 66, // AMD GCN GPUs (GFX6+) for MESA runtime 363 ELFOSABI_ARM = 97, // ARM 364 ELFOSABI_C6000_ELFABI = 64, // Bare-metal TMS320C6000 365 ELFOSABI_C6000_LINUX = 65, // Linux TMS320C6000 366 ELFOSABI_STANDALONE = 255, // Standalone (embedded) application 367 ELFOSABI_LAST_ARCH = 255 // Last Architecture-specific OS ABI 368 }; 369 370 // AMDGPU OS ABI Version identification. 371 enum { 372 // ELFABIVERSION_AMDGPU_HSA_V1 does not exist because OS ABI identification 373 // was never defined for V1. 374 ELFABIVERSION_AMDGPU_HSA_V2 = 0, 375 ELFABIVERSION_AMDGPU_HSA_V3 = 1, 376 ELFABIVERSION_AMDGPU_HSA_V4 = 2 377 }; 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 611 612 // Highest ISA version flags 613 EF_HEXAGON_ISA_MACH = 0x00000000, // Same as specified in bits[11:0] 614 // of e_flags 615 EF_HEXAGON_ISA_V2 = 0x00000010, // Hexagon V2 ISA 616 EF_HEXAGON_ISA_V3 = 0x00000020, // Hexagon V3 ISA 617 EF_HEXAGON_ISA_V4 = 0x00000030, // Hexagon V4 ISA 618 EF_HEXAGON_ISA_V5 = 0x00000040, // Hexagon V5 ISA 619 EF_HEXAGON_ISA_V55 = 0x00000050, // Hexagon V55 ISA 620 EF_HEXAGON_ISA_V60 = 0x00000060, // Hexagon V60 ISA 621 EF_HEXAGON_ISA_V62 = 0x00000062, // Hexagon V62 ISA 622 EF_HEXAGON_ISA_V65 = 0x00000065, // Hexagon V65 ISA 623 EF_HEXAGON_ISA_V66 = 0x00000066, // Hexagon V66 ISA 624 EF_HEXAGON_ISA_V67 = 0x00000067, // Hexagon V67 ISA 625 EF_HEXAGON_ISA_V68 = 0x00000068, // Hexagon V68 ISA 626 }; 627 628 // Hexagon-specific section indexes for common small data 629 enum { 630 SHN_HEXAGON_SCOMMON = 0xff00, // Other access sizes 631 SHN_HEXAGON_SCOMMON_1 = 0xff01, // Byte-sized access 632 SHN_HEXAGON_SCOMMON_2 = 0xff02, // Half-word-sized access 633 SHN_HEXAGON_SCOMMON_4 = 0xff03, // Word-sized access 634 SHN_HEXAGON_SCOMMON_8 = 0xff04 // Double-word-size access 635 }; 636 637 // ELF Relocation types for Hexagon 638 enum { 639 #include "ELFRelocs/Hexagon.def" 640 }; 641 642 // ELF Relocation type for Lanai. 643 enum { 644 #include "ELFRelocs/Lanai.def" 645 }; 646 647 // RISCV Specific e_flags 648 enum : unsigned { 649 EF_RISCV_RVC = 0x0001, 650 EF_RISCV_FLOAT_ABI = 0x0006, 651 EF_RISCV_FLOAT_ABI_SOFT = 0x0000, 652 EF_RISCV_FLOAT_ABI_SINGLE = 0x0002, 653 EF_RISCV_FLOAT_ABI_DOUBLE = 0x0004, 654 EF_RISCV_FLOAT_ABI_QUAD = 0x0006, 655 EF_RISCV_RVE = 0x0008 656 }; 657 658 // ELF Relocation types for RISC-V 659 enum { 660 #include "ELFRelocs/RISCV.def" 661 }; 662 663 // ELF Relocation types for S390/zSeries 664 enum { 665 #include "ELFRelocs/SystemZ.def" 666 }; 667 668 // ELF Relocation type for Sparc. 669 enum { 670 #include "ELFRelocs/Sparc.def" 671 }; 672 673 // AMDGPU specific e_flags. 674 enum : unsigned { 675 // Processor selection mask for EF_AMDGPU_MACH_* values. 676 EF_AMDGPU_MACH = 0x0ff, 677 678 // Not specified processor. 679 EF_AMDGPU_MACH_NONE = 0x000, 680 681 // R600-based processors. 682 683 // Radeon HD 2000/3000 Series (R600). 684 EF_AMDGPU_MACH_R600_R600 = 0x001, 685 EF_AMDGPU_MACH_R600_R630 = 0x002, 686 EF_AMDGPU_MACH_R600_RS880 = 0x003, 687 EF_AMDGPU_MACH_R600_RV670 = 0x004, 688 // Radeon HD 4000 Series (R700). 689 EF_AMDGPU_MACH_R600_RV710 = 0x005, 690 EF_AMDGPU_MACH_R600_RV730 = 0x006, 691 EF_AMDGPU_MACH_R600_RV770 = 0x007, 692 // Radeon HD 5000 Series (Evergreen). 693 EF_AMDGPU_MACH_R600_CEDAR = 0x008, 694 EF_AMDGPU_MACH_R600_CYPRESS = 0x009, 695 EF_AMDGPU_MACH_R600_JUNIPER = 0x00a, 696 EF_AMDGPU_MACH_R600_REDWOOD = 0x00b, 697 EF_AMDGPU_MACH_R600_SUMO = 0x00c, 698 // Radeon HD 6000 Series (Northern Islands). 699 EF_AMDGPU_MACH_R600_BARTS = 0x00d, 700 EF_AMDGPU_MACH_R600_CAICOS = 0x00e, 701 EF_AMDGPU_MACH_R600_CAYMAN = 0x00f, 702 EF_AMDGPU_MACH_R600_TURKS = 0x010, 703 704 // Reserved for R600-based processors. 705 EF_AMDGPU_MACH_R600_RESERVED_FIRST = 0x011, 706 EF_AMDGPU_MACH_R600_RESERVED_LAST = 0x01f, 707 708 // First/last R600-based processors. 709 EF_AMDGPU_MACH_R600_FIRST = EF_AMDGPU_MACH_R600_R600, 710 EF_AMDGPU_MACH_R600_LAST = EF_AMDGPU_MACH_R600_TURKS, 711 712 // AMDGCN-based processors. 713 EF_AMDGPU_MACH_AMDGCN_GFX600 = 0x020, 714 EF_AMDGPU_MACH_AMDGCN_GFX601 = 0x021, 715 EF_AMDGPU_MACH_AMDGCN_GFX700 = 0x022, 716 EF_AMDGPU_MACH_AMDGCN_GFX701 = 0x023, 717 EF_AMDGPU_MACH_AMDGCN_GFX702 = 0x024, 718 EF_AMDGPU_MACH_AMDGCN_GFX703 = 0x025, 719 EF_AMDGPU_MACH_AMDGCN_GFX704 = 0x026, 720 EF_AMDGPU_MACH_AMDGCN_RESERVED_0X27 = 0x027, 721 EF_AMDGPU_MACH_AMDGCN_GFX801 = 0x028, 722 EF_AMDGPU_MACH_AMDGCN_GFX802 = 0x029, 723 EF_AMDGPU_MACH_AMDGCN_GFX803 = 0x02a, 724 EF_AMDGPU_MACH_AMDGCN_GFX810 = 0x02b, 725 EF_AMDGPU_MACH_AMDGCN_GFX900 = 0x02c, 726 EF_AMDGPU_MACH_AMDGCN_GFX902 = 0x02d, 727 EF_AMDGPU_MACH_AMDGCN_GFX904 = 0x02e, 728 EF_AMDGPU_MACH_AMDGCN_GFX906 = 0x02f, 729 EF_AMDGPU_MACH_AMDGCN_GFX908 = 0x030, 730 EF_AMDGPU_MACH_AMDGCN_GFX909 = 0x031, 731 EF_AMDGPU_MACH_AMDGCN_GFX90C = 0x032, 732 EF_AMDGPU_MACH_AMDGCN_GFX1010 = 0x033, 733 EF_AMDGPU_MACH_AMDGCN_GFX1011 = 0x034, 734 EF_AMDGPU_MACH_AMDGCN_GFX1012 = 0x035, 735 EF_AMDGPU_MACH_AMDGCN_GFX1030 = 0x036, 736 EF_AMDGPU_MACH_AMDGCN_GFX1031 = 0x037, 737 EF_AMDGPU_MACH_AMDGCN_GFX1032 = 0x038, 738 EF_AMDGPU_MACH_AMDGCN_GFX1033 = 0x039, 739 EF_AMDGPU_MACH_AMDGCN_GFX602 = 0x03a, 740 EF_AMDGPU_MACH_AMDGCN_GFX705 = 0x03b, 741 EF_AMDGPU_MACH_AMDGCN_GFX805 = 0x03c, 742 EF_AMDGPU_MACH_AMDGCN_GFX1035 = 0x03d, 743 EF_AMDGPU_MACH_AMDGCN_GFX1034 = 0x03e, 744 EF_AMDGPU_MACH_AMDGCN_GFX90A = 0x03f, 745 EF_AMDGPU_MACH_AMDGCN_RESERVED_0X40 = 0x040, 746 EF_AMDGPU_MACH_AMDGCN_RESERVED_0X41 = 0x041, 747 EF_AMDGPU_MACH_AMDGCN_GFX1013 = 0x042, 748 EF_AMDGPU_MACH_AMDGCN_RESERVED_0X43 = 0x043, 749 EF_AMDGPU_MACH_AMDGCN_RESERVED_0X44 = 0x044, 750 EF_AMDGPU_MACH_AMDGCN_RESERVED_0X45 = 0x045, 751 752 // First/last AMDGCN-based processors. 753 EF_AMDGPU_MACH_AMDGCN_FIRST = EF_AMDGPU_MACH_AMDGCN_GFX600, 754 EF_AMDGPU_MACH_AMDGCN_LAST = EF_AMDGPU_MACH_AMDGCN_RESERVED_0X45, 755 756 // Indicates if the "xnack" target feature is enabled for all code contained 757 // in the object. 758 // 759 // Only valid for ELFOSABI_AMDGPU_HSA and ELFABIVERSION_AMDGPU_HSA_V2. 760 EF_AMDGPU_FEATURE_XNACK_V2 = 0x01, 761 // Indicates if the trap handler is enabled for all code contained 762 // in the object. 763 // 764 // Only valid for ELFOSABI_AMDGPU_HSA and ELFABIVERSION_AMDGPU_HSA_V2. 765 EF_AMDGPU_FEATURE_TRAP_HANDLER_V2 = 0x02, 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_V3. 771 EF_AMDGPU_FEATURE_XNACK_V3 = 0x100, 772 // Indicates if the "sramecc" target feature is enabled for all code 773 // contained in the object. 774 // 775 // Only valid for ELFOSABI_AMDGPU_HSA and ELFABIVERSION_AMDGPU_HSA_V3. 776 EF_AMDGPU_FEATURE_SRAMECC_V3 = 0x200, 777 778 // XNACK selection mask for EF_AMDGPU_FEATURE_XNACK_* values. 779 // 780 // Only valid for ELFOSABI_AMDGPU_HSA and ELFABIVERSION_AMDGPU_HSA_V4. 781 EF_AMDGPU_FEATURE_XNACK_V4 = 0x300, 782 // XNACK is not supported. 783 EF_AMDGPU_FEATURE_XNACK_UNSUPPORTED_V4 = 0x000, 784 // XNACK is any/default/unspecified. 785 EF_AMDGPU_FEATURE_XNACK_ANY_V4 = 0x100, 786 // XNACK is off. 787 EF_AMDGPU_FEATURE_XNACK_OFF_V4 = 0x200, 788 // XNACK is on. 789 EF_AMDGPU_FEATURE_XNACK_ON_V4 = 0x300, 790 791 // SRAMECC selection mask for EF_AMDGPU_FEATURE_SRAMECC_* values. 792 // 793 // Only valid for ELFOSABI_AMDGPU_HSA and ELFABIVERSION_AMDGPU_HSA_V4. 794 EF_AMDGPU_FEATURE_SRAMECC_V4 = 0xc00, 795 // SRAMECC is not supported. 796 EF_AMDGPU_FEATURE_SRAMECC_UNSUPPORTED_V4 = 0x000, 797 // SRAMECC is any/default/unspecified. 798 EF_AMDGPU_FEATURE_SRAMECC_ANY_V4 = 0x400, 799 // SRAMECC is off. 800 EF_AMDGPU_FEATURE_SRAMECC_OFF_V4 = 0x800, 801 // SRAMECC is on. 802 EF_AMDGPU_FEATURE_SRAMECC_ON_V4 = 0xc00, 803 }; 804 805 // ELF Relocation types for AMDGPU 806 enum { 807 #include "ELFRelocs/AMDGPU.def" 808 }; 809 810 // ELF Relocation types for BPF 811 enum { 812 #include "ELFRelocs/BPF.def" 813 }; 814 815 // ELF Relocation types for M68k 816 enum { 817 #include "ELFRelocs/M68k.def" 818 }; 819 820 // MSP430 specific e_flags 821 enum : unsigned { 822 EF_MSP430_MACH_MSP430x11 = 11, 823 EF_MSP430_MACH_MSP430x11x1 = 110, 824 EF_MSP430_MACH_MSP430x12 = 12, 825 EF_MSP430_MACH_MSP430x13 = 13, 826 EF_MSP430_MACH_MSP430x14 = 14, 827 EF_MSP430_MACH_MSP430x15 = 15, 828 EF_MSP430_MACH_MSP430x16 = 16, 829 EF_MSP430_MACH_MSP430x20 = 20, 830 EF_MSP430_MACH_MSP430x22 = 22, 831 EF_MSP430_MACH_MSP430x23 = 23, 832 EF_MSP430_MACH_MSP430x24 = 24, 833 EF_MSP430_MACH_MSP430x26 = 26, 834 EF_MSP430_MACH_MSP430x31 = 31, 835 EF_MSP430_MACH_MSP430x32 = 32, 836 EF_MSP430_MACH_MSP430x33 = 33, 837 EF_MSP430_MACH_MSP430x41 = 41, 838 EF_MSP430_MACH_MSP430x42 = 42, 839 EF_MSP430_MACH_MSP430x43 = 43, 840 EF_MSP430_MACH_MSP430x44 = 44, 841 EF_MSP430_MACH_MSP430X = 45, 842 EF_MSP430_MACH_MSP430x46 = 46, 843 EF_MSP430_MACH_MSP430x47 = 47, 844 EF_MSP430_MACH_MSP430x54 = 54, 845 }; 846 847 // ELF Relocation types for MSP430 848 enum { 849 #include "ELFRelocs/MSP430.def" 850 }; 851 852 // ELF Relocation type for VE. 853 enum { 854 #include "ELFRelocs/VE.def" 855 }; 856 857 858 // ELF Relocation types for CSKY 859 enum { 860 #include "ELFRelocs/CSKY.def" 861 }; 862 863 #undef ELF_RELOC 864 865 // Section header. 866 struct Elf32_Shdr { 867 Elf32_Word sh_name; // Section name (index into string table) 868 Elf32_Word sh_type; // Section type (SHT_*) 869 Elf32_Word sh_flags; // Section flags (SHF_*) 870 Elf32_Addr sh_addr; // Address where section is to be loaded 871 Elf32_Off sh_offset; // File offset of section data, in bytes 872 Elf32_Word sh_size; // Size of section, in bytes 873 Elf32_Word sh_link; // Section type-specific header table index link 874 Elf32_Word sh_info; // Section type-specific extra information 875 Elf32_Word sh_addralign; // Section address alignment 876 Elf32_Word sh_entsize; // Size of records contained within the section 877 }; 878 879 // Section header for ELF64 - same fields as ELF32, different types. 880 struct Elf64_Shdr { 881 Elf64_Word sh_name; 882 Elf64_Word sh_type; 883 Elf64_Xword sh_flags; 884 Elf64_Addr sh_addr; 885 Elf64_Off sh_offset; 886 Elf64_Xword sh_size; 887 Elf64_Word sh_link; 888 Elf64_Word sh_info; 889 Elf64_Xword sh_addralign; 890 Elf64_Xword sh_entsize; 891 }; 892 893 // Special section indices. 894 enum { 895 SHN_UNDEF = 0, // Undefined, missing, irrelevant, or meaningless 896 SHN_LORESERVE = 0xff00, // Lowest reserved index 897 SHN_LOPROC = 0xff00, // Lowest processor-specific index 898 SHN_HIPROC = 0xff1f, // Highest processor-specific index 899 SHN_LOOS = 0xff20, // Lowest operating system-specific index 900 SHN_HIOS = 0xff3f, // Highest operating system-specific index 901 SHN_ABS = 0xfff1, // Symbol has absolute value; does not need relocation 902 SHN_COMMON = 0xfff2, // FORTRAN COMMON or C external global variables 903 SHN_XINDEX = 0xffff, // Mark that the index is >= SHN_LORESERVE 904 SHN_HIRESERVE = 0xffff // Highest reserved index 905 }; 906 907 // Section types. 908 enum : unsigned { 909 SHT_NULL = 0, // No associated section (inactive entry). 910 SHT_PROGBITS = 1, // Program-defined contents. 911 SHT_SYMTAB = 2, // Symbol table. 912 SHT_STRTAB = 3, // String table. 913 SHT_RELA = 4, // Relocation entries; explicit addends. 914 SHT_HASH = 5, // Symbol hash table. 915 SHT_DYNAMIC = 6, // Information for dynamic linking. 916 SHT_NOTE = 7, // Information about the file. 917 SHT_NOBITS = 8, // Data occupies no space in the file. 918 SHT_REL = 9, // Relocation entries; no explicit addends. 919 SHT_SHLIB = 10, // Reserved. 920 SHT_DYNSYM = 11, // Symbol table. 921 SHT_INIT_ARRAY = 14, // Pointers to initialization functions. 922 SHT_FINI_ARRAY = 15, // Pointers to termination functions. 923 SHT_PREINIT_ARRAY = 16, // Pointers to pre-init functions. 924 SHT_GROUP = 17, // Section group. 925 SHT_SYMTAB_SHNDX = 18, // Indices for SHN_XINDEX entries. 926 // Experimental support for SHT_RELR sections. For details, see proposal 927 // at https://groups.google.com/forum/#!topic/generic-abi/bX460iggiKg 928 SHT_RELR = 19, // Relocation entries; only offsets. 929 SHT_LOOS = 0x60000000, // Lowest operating system-specific type. 930 // Android packed relocation section types. 931 // https://android.googlesource.com/platform/bionic/+/6f12bfece5dcc01325e0abba56a46b1bcf991c69/tools/relocation_packer/src/elf_file.cc#37 932 SHT_ANDROID_REL = 0x60000001, 933 SHT_ANDROID_RELA = 0x60000002, 934 SHT_LLVM_ODRTAB = 0x6fff4c00, // LLVM ODR table. 935 SHT_LLVM_LINKER_OPTIONS = 0x6fff4c01, // LLVM Linker Options. 936 SHT_LLVM_ADDRSIG = 0x6fff4c03, // List of address-significant symbols 937 // for safe ICF. 938 SHT_LLVM_DEPENDENT_LIBRARIES = 939 0x6fff4c04, // LLVM Dependent Library Specifiers. 940 SHT_LLVM_SYMPART = 0x6fff4c05, // Symbol partition specification. 941 SHT_LLVM_PART_EHDR = 0x6fff4c06, // ELF header for loadable partition. 942 SHT_LLVM_PART_PHDR = 0x6fff4c07, // Phdrs for loadable partition. 943 SHT_LLVM_BB_ADDR_MAP = 0x6fff4c08, // LLVM Basic Block Address Map. 944 SHT_LLVM_CALL_GRAPH_PROFILE = 0x6fff4c09, // LLVM Call Graph Profile. 945 // Android's experimental support for SHT_RELR sections. 946 // https://android.googlesource.com/platform/bionic/+/b7feec74547f84559a1467aca02708ff61346d2a/libc/include/elf.h#512 947 SHT_ANDROID_RELR = 0x6fffff00, // Relocation entries; only offsets. 948 SHT_GNU_ATTRIBUTES = 0x6ffffff5, // Object attributes. 949 SHT_GNU_HASH = 0x6ffffff6, // GNU-style hash table. 950 SHT_GNU_verdef = 0x6ffffffd, // GNU version definitions. 951 SHT_GNU_verneed = 0x6ffffffe, // GNU version references. 952 SHT_GNU_versym = 0x6fffffff, // GNU symbol versions table. 953 SHT_HIOS = 0x6fffffff, // Highest operating system-specific type. 954 SHT_LOPROC = 0x70000000, // Lowest processor arch-specific type. 955 // Fixme: All this is duplicated in MCSectionELF. Why?? 956 // Exception Index table 957 SHT_ARM_EXIDX = 0x70000001U, 958 // BPABI DLL dynamic linking pre-emption map 959 SHT_ARM_PREEMPTMAP = 0x70000002U, 960 // Object file compatibility attributes 961 SHT_ARM_ATTRIBUTES = 0x70000003U, 962 SHT_ARM_DEBUGOVERLAY = 0x70000004U, 963 SHT_ARM_OVERLAYSECTION = 0x70000005U, 964 SHT_HEX_ORDERED = 0x70000000, // Link editor is to sort the entries in 965 // this section based on their sizes 966 SHT_X86_64_UNWIND = 0x70000001, // Unwind information 967 968 SHT_MIPS_REGINFO = 0x70000006, // Register usage information 969 SHT_MIPS_OPTIONS = 0x7000000d, // General options 970 SHT_MIPS_DWARF = 0x7000001e, // DWARF debugging section. 971 SHT_MIPS_ABIFLAGS = 0x7000002a, // ABI information. 972 973 SHT_MSP430_ATTRIBUTES = 0x70000003U, 974 975 SHT_RISCV_ATTRIBUTES = 0x70000003U, 976 977 SHT_HIPROC = 0x7fffffff, // Highest processor arch-specific type. 978 SHT_LOUSER = 0x80000000, // Lowest type reserved for applications. 979 SHT_HIUSER = 0xffffffff // Highest type reserved for applications. 980 }; 981 982 // Section flags. 983 enum : unsigned { 984 // Section data should be writable during execution. 985 SHF_WRITE = 0x1, 986 987 // Section occupies memory during program execution. 988 SHF_ALLOC = 0x2, 989 990 // Section contains executable machine instructions. 991 SHF_EXECINSTR = 0x4, 992 993 // The data in this section may be merged. 994 SHF_MERGE = 0x10, 995 996 // The data in this section is null-terminated strings. 997 SHF_STRINGS = 0x20, 998 999 // A field in this section holds a section header table index. 1000 SHF_INFO_LINK = 0x40U, 1001 1002 // Adds special ordering requirements for link editors. 1003 SHF_LINK_ORDER = 0x80U, 1004 1005 // This section requires special OS-specific processing to avoid incorrect 1006 // behavior. 1007 SHF_OS_NONCONFORMING = 0x100U, 1008 1009 // This section is a member of a section group. 1010 SHF_GROUP = 0x200U, 1011 1012 // This section holds Thread-Local Storage. 1013 SHF_TLS = 0x400U, 1014 1015 // Identifies a section containing compressed data. 1016 SHF_COMPRESSED = 0x800U, 1017 1018 // This section should not be garbage collected by the linker. 1019 SHF_GNU_RETAIN = 0x200000, 1020 1021 // This section is excluded from the final executable or shared library. 1022 SHF_EXCLUDE = 0x80000000U, 1023 1024 // Start of target-specific flags. 1025 1026 SHF_MASKOS = 0x0ff00000, 1027 1028 // Bits indicating processor-specific flags. 1029 SHF_MASKPROC = 0xf0000000, 1030 1031 /// All sections with the "d" flag are grouped together by the linker to form 1032 /// the data section and the dp register is set to the start of the section by 1033 /// the boot code. 1034 XCORE_SHF_DP_SECTION = 0x10000000, 1035 1036 /// All sections with the "c" flag are grouped together by the linker to form 1037 /// the constant pool and the cp register is set to the start of the constant 1038 /// pool by the boot code. 1039 XCORE_SHF_CP_SECTION = 0x20000000, 1040 1041 // If an object file section does not have this flag set, then it may not hold 1042 // more than 2GB and can be freely referred to in objects using smaller code 1043 // models. Otherwise, only objects using larger code models can refer to them. 1044 // For example, a medium code model object can refer to data in a section that 1045 // sets this flag besides being able to refer to data in a section that does 1046 // not set it; likewise, a small code model object can refer only to code in a 1047 // section that does not set this flag. 1048 SHF_X86_64_LARGE = 0x10000000, 1049 1050 // All sections with the GPREL flag are grouped into a global data area 1051 // for faster accesses 1052 SHF_HEX_GPREL = 0x10000000, 1053 1054 // Section contains text/data which may be replicated in other sections. 1055 // Linker must retain only one copy. 1056 SHF_MIPS_NODUPES = 0x01000000, 1057 1058 // Linker must generate implicit hidden weak names. 1059 SHF_MIPS_NAMES = 0x02000000, 1060 1061 // Section data local to process. 1062 SHF_MIPS_LOCAL = 0x04000000, 1063 1064 // Do not strip this section. 1065 SHF_MIPS_NOSTRIP = 0x08000000, 1066 1067 // Section must be part of global data area. 1068 SHF_MIPS_GPREL = 0x10000000, 1069 1070 // This section should be merged. 1071 SHF_MIPS_MERGE = 0x20000000, 1072 1073 // Address size to be inferred from section entry size. 1074 SHF_MIPS_ADDR = 0x40000000, 1075 1076 // Section data is string data by default. 1077 SHF_MIPS_STRING = 0x80000000, 1078 1079 // Make code section unreadable when in execute-only mode 1080 SHF_ARM_PURECODE = 0x20000000 1081 }; 1082 1083 // Section Group Flags 1084 enum : unsigned { 1085 GRP_COMDAT = 0x1, 1086 GRP_MASKOS = 0x0ff00000, 1087 GRP_MASKPROC = 0xf0000000 1088 }; 1089 1090 // Symbol table entries for ELF32. 1091 struct Elf32_Sym { 1092 Elf32_Word st_name; // Symbol name (index into string table) 1093 Elf32_Addr st_value; // Value or address associated with the symbol 1094 Elf32_Word st_size; // Size of the symbol 1095 unsigned char st_info; // Symbol's type and binding attributes 1096 unsigned char st_other; // Must be zero; reserved 1097 Elf32_Half st_shndx; // Which section (header table index) it's defined in 1098 1099 // These accessors and mutators correspond to the ELF32_ST_BIND, 1100 // ELF32_ST_TYPE, and ELF32_ST_INFO macros defined in the ELF specification: 1101 unsigned char getBinding() const { return st_info >> 4; } 1102 unsigned char getType() const { return st_info & 0x0f; } 1103 void setBinding(unsigned char b) { setBindingAndType(b, getType()); } 1104 void setType(unsigned char t) { setBindingAndType(getBinding(), t); } 1105 void setBindingAndType(unsigned char b, unsigned char t) { 1106 st_info = (b << 4) + (t & 0x0f); 1107 } 1108 }; 1109 1110 // Symbol table entries for ELF64. 1111 struct Elf64_Sym { 1112 Elf64_Word st_name; // Symbol name (index into string table) 1113 unsigned char st_info; // Symbol's type and binding attributes 1114 unsigned char st_other; // Must be zero; reserved 1115 Elf64_Half st_shndx; // Which section (header tbl index) it's defined in 1116 Elf64_Addr st_value; // Value or address associated with the symbol 1117 Elf64_Xword st_size; // Size of the symbol 1118 1119 // These accessors and mutators are identical to those defined for ELF32 1120 // symbol table entries. 1121 unsigned char getBinding() const { return st_info >> 4; } 1122 unsigned char getType() const { return st_info & 0x0f; } 1123 void setBinding(unsigned char b) { setBindingAndType(b, getType()); } 1124 void setType(unsigned char t) { setBindingAndType(getBinding(), t); } 1125 void setBindingAndType(unsigned char b, unsigned char t) { 1126 st_info = (b << 4) + (t & 0x0f); 1127 } 1128 }; 1129 1130 // The size (in bytes) of symbol table entries. 1131 enum { 1132 SYMENTRY_SIZE32 = 16, // 32-bit symbol entry size 1133 SYMENTRY_SIZE64 = 24 // 64-bit symbol entry size. 1134 }; 1135 1136 // Symbol bindings. 1137 enum { 1138 STB_LOCAL = 0, // Local symbol, not visible outside obj file containing def 1139 STB_GLOBAL = 1, // Global symbol, visible to all object files being combined 1140 STB_WEAK = 2, // Weak symbol, like global but lower-precedence 1141 STB_GNU_UNIQUE = 10, 1142 STB_LOOS = 10, // Lowest operating system-specific binding type 1143 STB_HIOS = 12, // Highest operating system-specific binding type 1144 STB_LOPROC = 13, // Lowest processor-specific binding type 1145 STB_HIPROC = 15 // Highest processor-specific binding type 1146 }; 1147 1148 // Symbol types. 1149 enum { 1150 STT_NOTYPE = 0, // Symbol's type is not specified 1151 STT_OBJECT = 1, // Symbol is a data object (variable, array, etc.) 1152 STT_FUNC = 2, // Symbol is executable code (function, etc.) 1153 STT_SECTION = 3, // Symbol refers to a section 1154 STT_FILE = 4, // Local, absolute symbol that refers to a file 1155 STT_COMMON = 5, // An uninitialized common block 1156 STT_TLS = 6, // Thread local data object 1157 STT_GNU_IFUNC = 10, // GNU indirect function 1158 STT_LOOS = 10, // Lowest operating system-specific symbol type 1159 STT_HIOS = 12, // Highest operating system-specific symbol type 1160 STT_LOPROC = 13, // Lowest processor-specific symbol type 1161 STT_HIPROC = 15, // Highest processor-specific symbol type 1162 1163 // AMDGPU symbol types 1164 STT_AMDGPU_HSA_KERNEL = 10 1165 }; 1166 1167 enum { 1168 STV_DEFAULT = 0, // Visibility is specified by binding type 1169 STV_INTERNAL = 1, // Defined by processor supplements 1170 STV_HIDDEN = 2, // Not visible to other components 1171 STV_PROTECTED = 3 // Visible in other components but not preemptable 1172 }; 1173 1174 // Symbol number. 1175 enum { STN_UNDEF = 0 }; 1176 1177 // Special relocation symbols used in the MIPS64 ELF relocation entries 1178 enum { 1179 RSS_UNDEF = 0, // None 1180 RSS_GP = 1, // Value of gp 1181 RSS_GP0 = 2, // Value of gp used to create object being relocated 1182 RSS_LOC = 3 // Address of location being relocated 1183 }; 1184 1185 // Relocation entry, without explicit addend. 1186 struct Elf32_Rel { 1187 Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr) 1188 Elf32_Word r_info; // Symbol table index and type of relocation to apply 1189 1190 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE, 1191 // and ELF32_R_INFO macros defined in the ELF specification: 1192 Elf32_Word getSymbol() const { return (r_info >> 8); } 1193 unsigned char getType() const { return (unsigned char)(r_info & 0x0ff); } 1194 void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); } 1195 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); } 1196 void setSymbolAndType(Elf32_Word s, unsigned char t) { 1197 r_info = (s << 8) + t; 1198 } 1199 }; 1200 1201 // Relocation entry with explicit addend. 1202 struct Elf32_Rela { 1203 Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr) 1204 Elf32_Word r_info; // Symbol table index and type of relocation to apply 1205 Elf32_Sword r_addend; // Compute value for relocatable field by adding this 1206 1207 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE, 1208 // and ELF32_R_INFO macros defined in the ELF specification: 1209 Elf32_Word getSymbol() const { return (r_info >> 8); } 1210 unsigned char getType() const { return (unsigned char)(r_info & 0x0ff); } 1211 void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); } 1212 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); } 1213 void setSymbolAndType(Elf32_Word s, unsigned char t) { 1214 r_info = (s << 8) + t; 1215 } 1216 }; 1217 1218 // Relocation entry without explicit addend or info (relative relocations only). 1219 typedef Elf32_Word Elf32_Relr; // offset/bitmap for relative relocations 1220 1221 // Relocation entry, without explicit addend. 1222 struct Elf64_Rel { 1223 Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr). 1224 Elf64_Xword r_info; // Symbol table index and type of relocation to apply. 1225 1226 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE, 1227 // and ELF64_R_INFO macros defined in the ELF specification: 1228 Elf64_Word getSymbol() const { return (r_info >> 32); } 1229 Elf64_Word getType() const { return (Elf64_Word)(r_info & 0xffffffffL); } 1230 void setSymbol(Elf64_Word s) { setSymbolAndType(s, getType()); } 1231 void setType(Elf64_Word t) { setSymbolAndType(getSymbol(), t); } 1232 void setSymbolAndType(Elf64_Word s, Elf64_Word t) { 1233 r_info = ((Elf64_Xword)s << 32) + (t & 0xffffffffL); 1234 } 1235 }; 1236 1237 // Relocation entry with explicit addend. 1238 struct Elf64_Rela { 1239 Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr). 1240 Elf64_Xword r_info; // Symbol table index and type of relocation to apply. 1241 Elf64_Sxword r_addend; // Compute value for relocatable field by adding this. 1242 1243 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE, 1244 // and ELF64_R_INFO macros defined in the ELF specification: 1245 Elf64_Word getSymbol() const { return (r_info >> 32); } 1246 Elf64_Word getType() const { return (Elf64_Word)(r_info & 0xffffffffL); } 1247 void setSymbol(Elf64_Word s) { setSymbolAndType(s, getType()); } 1248 void setType(Elf64_Word t) { setSymbolAndType(getSymbol(), t); } 1249 void setSymbolAndType(Elf64_Word s, Elf64_Word t) { 1250 r_info = ((Elf64_Xword)s << 32) + (t & 0xffffffffL); 1251 } 1252 }; 1253 1254 // Relocation entry without explicit addend or info (relative relocations only). 1255 typedef Elf64_Xword Elf64_Relr; // offset/bitmap for relative relocations 1256 1257 // Program header for ELF32. 1258 struct Elf32_Phdr { 1259 Elf32_Word p_type; // Type of segment 1260 Elf32_Off p_offset; // File offset where segment is located, in bytes 1261 Elf32_Addr p_vaddr; // Virtual address of beginning of segment 1262 Elf32_Addr p_paddr; // Physical address of beginning of segment (OS-specific) 1263 Elf32_Word p_filesz; // Num. of bytes in file image of segment (may be zero) 1264 Elf32_Word p_memsz; // Num. of bytes in mem image of segment (may be zero) 1265 Elf32_Word p_flags; // Segment flags 1266 Elf32_Word p_align; // Segment alignment constraint 1267 }; 1268 1269 // Program header for ELF64. 1270 struct Elf64_Phdr { 1271 Elf64_Word p_type; // Type of segment 1272 Elf64_Word p_flags; // Segment flags 1273 Elf64_Off p_offset; // File offset where segment is located, in bytes 1274 Elf64_Addr p_vaddr; // Virtual address of beginning of segment 1275 Elf64_Addr p_paddr; // Physical addr of beginning of segment (OS-specific) 1276 Elf64_Xword p_filesz; // Num. of bytes in file image of segment (may be zero) 1277 Elf64_Xword p_memsz; // Num. of bytes in mem image of segment (may be zero) 1278 Elf64_Xword p_align; // Segment alignment constraint 1279 }; 1280 1281 // Segment types. 1282 enum { 1283 PT_NULL = 0, // Unused segment. 1284 PT_LOAD = 1, // Loadable segment. 1285 PT_DYNAMIC = 2, // Dynamic linking information. 1286 PT_INTERP = 3, // Interpreter pathname. 1287 PT_NOTE = 4, // Auxiliary information. 1288 PT_SHLIB = 5, // Reserved. 1289 PT_PHDR = 6, // The program header table itself. 1290 PT_TLS = 7, // The thread-local storage template. 1291 PT_LOOS = 0x60000000, // Lowest operating system-specific pt entry type. 1292 PT_HIOS = 0x6fffffff, // Highest operating system-specific pt entry type. 1293 PT_LOPROC = 0x70000000, // Lowest processor-specific program hdr entry type. 1294 PT_HIPROC = 0x7fffffff, // Highest processor-specific program hdr entry type. 1295 1296 // x86-64 program header types. 1297 // These all contain stack unwind tables. 1298 PT_GNU_EH_FRAME = 0x6474e550, 1299 PT_SUNW_EH_FRAME = 0x6474e550, 1300 PT_SUNW_UNWIND = 0x6464e550, 1301 1302 PT_GNU_STACK = 0x6474e551, // Indicates stack executability. 1303 PT_GNU_RELRO = 0x6474e552, // Read-only after relocation. 1304 PT_GNU_PROPERTY = 0x6474e553, // .note.gnu.property notes sections. 1305 1306 PT_OPENBSD_RANDOMIZE = 0x65a3dbe6, // Fill with random data. 1307 PT_OPENBSD_WXNEEDED = 0x65a3dbe7, // Program does W^X violations. 1308 PT_OPENBSD_BOOTDATA = 0x65a41be6, // Section for boot arguments. 1309 1310 // ARM program header types. 1311 PT_ARM_ARCHEXT = 0x70000000, // Platform architecture compatibility info 1312 // These all contain stack unwind tables. 1313 PT_ARM_EXIDX = 0x70000001, 1314 PT_ARM_UNWIND = 0x70000001, 1315 1316 // MIPS program header types. 1317 PT_MIPS_REGINFO = 0x70000000, // Register usage information. 1318 PT_MIPS_RTPROC = 0x70000001, // Runtime procedure table. 1319 PT_MIPS_OPTIONS = 0x70000002, // Options segment. 1320 PT_MIPS_ABIFLAGS = 0x70000003, // Abiflags segment. 1321 }; 1322 1323 // Segment flag bits. 1324 enum : unsigned { 1325 PF_X = 1, // Execute 1326 PF_W = 2, // Write 1327 PF_R = 4, // Read 1328 PF_MASKOS = 0x0ff00000, // Bits for operating system-specific semantics. 1329 PF_MASKPROC = 0xf0000000 // Bits for processor-specific semantics. 1330 }; 1331 1332 // Dynamic table entry for ELF32. 1333 struct Elf32_Dyn { 1334 Elf32_Sword d_tag; // Type of dynamic table entry. 1335 union { 1336 Elf32_Word d_val; // Integer value of entry. 1337 Elf32_Addr d_ptr; // Pointer value of entry. 1338 } d_un; 1339 }; 1340 1341 // Dynamic table entry for ELF64. 1342 struct Elf64_Dyn { 1343 Elf64_Sxword d_tag; // Type of dynamic table entry. 1344 union { 1345 Elf64_Xword d_val; // Integer value of entry. 1346 Elf64_Addr d_ptr; // Pointer value of entry. 1347 } d_un; 1348 }; 1349 1350 // Dynamic table entry tags. 1351 enum { 1352 #define DYNAMIC_TAG(name, value) DT_##name = value, 1353 #include "DynamicTags.def" 1354 #undef DYNAMIC_TAG 1355 }; 1356 1357 // DT_FLAGS values. 1358 enum { 1359 DF_ORIGIN = 0x01, // The object may reference $ORIGIN. 1360 DF_SYMBOLIC = 0x02, // Search the shared lib before searching the exe. 1361 DF_TEXTREL = 0x04, // Relocations may modify a non-writable segment. 1362 DF_BIND_NOW = 0x08, // Process all relocations on load. 1363 DF_STATIC_TLS = 0x10 // Reject attempts to load dynamically. 1364 }; 1365 1366 // State flags selectable in the `d_un.d_val' element of the DT_FLAGS_1 entry. 1367 enum { 1368 DF_1_NOW = 0x00000001, // Set RTLD_NOW for this object. 1369 DF_1_GLOBAL = 0x00000002, // Set RTLD_GLOBAL for this object. 1370 DF_1_GROUP = 0x00000004, // Set RTLD_GROUP for this object. 1371 DF_1_NODELETE = 0x00000008, // Set RTLD_NODELETE for this object. 1372 DF_1_LOADFLTR = 0x00000010, // Trigger filtee loading at runtime. 1373 DF_1_INITFIRST = 0x00000020, // Set RTLD_INITFIRST for this object. 1374 DF_1_NOOPEN = 0x00000040, // Set RTLD_NOOPEN for this object. 1375 DF_1_ORIGIN = 0x00000080, // $ORIGIN must be handled. 1376 DF_1_DIRECT = 0x00000100, // Direct binding enabled. 1377 DF_1_TRANS = 0x00000200, 1378 DF_1_INTERPOSE = 0x00000400, // Object is used to interpose. 1379 DF_1_NODEFLIB = 0x00000800, // Ignore default lib search path. 1380 DF_1_NODUMP = 0x00001000, // Object can't be dldump'ed. 1381 DF_1_CONFALT = 0x00002000, // Configuration alternative created. 1382 DF_1_ENDFILTEE = 0x00004000, // Filtee terminates filters search. 1383 DF_1_DISPRELDNE = 0x00008000, // Disp reloc applied at build time. 1384 DF_1_DISPRELPND = 0x00010000, // Disp reloc applied at run-time. 1385 DF_1_NODIRECT = 0x00020000, // Object has no-direct binding. 1386 DF_1_IGNMULDEF = 0x00040000, 1387 DF_1_NOKSYMS = 0x00080000, 1388 DF_1_NOHDR = 0x00100000, 1389 DF_1_EDITED = 0x00200000, // Object is modified after built. 1390 DF_1_NORELOC = 0x00400000, 1391 DF_1_SYMINTPOSE = 0x00800000, // Object has individual interposers. 1392 DF_1_GLOBAUDIT = 0x01000000, // Global auditing required. 1393 DF_1_SINGLETON = 0x02000000, // Singleton symbols are used. 1394 DF_1_PIE = 0x08000000, // Object is a position-independent executable. 1395 }; 1396 1397 // DT_MIPS_FLAGS values. 1398 enum { 1399 RHF_NONE = 0x00000000, // No flags. 1400 RHF_QUICKSTART = 0x00000001, // Uses shortcut pointers. 1401 RHF_NOTPOT = 0x00000002, // Hash size is not a power of two. 1402 RHS_NO_LIBRARY_REPLACEMENT = 0x00000004, // Ignore LD_LIBRARY_PATH. 1403 RHF_NO_MOVE = 0x00000008, // DSO address may not be relocated. 1404 RHF_SGI_ONLY = 0x00000010, // SGI specific features. 1405 RHF_GUARANTEE_INIT = 0x00000020, // Guarantee that .init will finish 1406 // executing before any non-init 1407 // code in DSO is called. 1408 RHF_DELTA_C_PLUS_PLUS = 0x00000040, // Contains Delta C++ code. 1409 RHF_GUARANTEE_START_INIT = 0x00000080, // Guarantee that .init will start 1410 // executing before any non-init 1411 // code in DSO is called. 1412 RHF_PIXIE = 0x00000100, // Generated by pixie. 1413 RHF_DEFAULT_DELAY_LOAD = 0x00000200, // Delay-load DSO by default. 1414 RHF_REQUICKSTART = 0x00000400, // Object may be requickstarted 1415 RHF_REQUICKSTARTED = 0x00000800, // Object has been requickstarted 1416 RHF_CORD = 0x00001000, // Generated by cord. 1417 RHF_NO_UNRES_UNDEF = 0x00002000, // Object contains no unresolved 1418 // undef symbols. 1419 RHF_RLD_ORDER_SAFE = 0x00004000 // Symbol table is in a safe order. 1420 }; 1421 1422 // ElfXX_VerDef structure version (GNU versioning) 1423 enum { VER_DEF_NONE = 0, VER_DEF_CURRENT = 1 }; 1424 1425 // VerDef Flags (ElfXX_VerDef::vd_flags) 1426 enum { VER_FLG_BASE = 0x1, VER_FLG_WEAK = 0x2, VER_FLG_INFO = 0x4 }; 1427 1428 // Special constants for the version table. (SHT_GNU_versym/.gnu.version) 1429 enum { 1430 VER_NDX_LOCAL = 0, // Unversioned local symbol 1431 VER_NDX_GLOBAL = 1, // Unversioned global symbol 1432 VERSYM_VERSION = 0x7fff, // Version Index mask 1433 VERSYM_HIDDEN = 0x8000 // Hidden bit (non-default version) 1434 }; 1435 1436 // ElfXX_VerNeed structure version (GNU versioning) 1437 enum { VER_NEED_NONE = 0, VER_NEED_CURRENT = 1 }; 1438 1439 // SHT_NOTE section types. 1440 1441 // Generic note types. 1442 enum : unsigned { 1443 NT_VERSION = 1, 1444 NT_ARCH = 2, 1445 NT_GNU_BUILD_ATTRIBUTE_OPEN = 0x100, 1446 NT_GNU_BUILD_ATTRIBUTE_FUNC = 0x101, 1447 }; 1448 1449 // Core note types. 1450 enum : unsigned { 1451 NT_PRSTATUS = 1, 1452 NT_FPREGSET = 2, 1453 NT_PRPSINFO = 3, 1454 NT_TASKSTRUCT = 4, 1455 NT_AUXV = 6, 1456 NT_PSTATUS = 10, 1457 NT_FPREGS = 12, 1458 NT_PSINFO = 13, 1459 NT_LWPSTATUS = 16, 1460 NT_LWPSINFO = 17, 1461 NT_WIN32PSTATUS = 18, 1462 1463 NT_PPC_VMX = 0x100, 1464 NT_PPC_VSX = 0x102, 1465 NT_PPC_TAR = 0x103, 1466 NT_PPC_PPR = 0x104, 1467 NT_PPC_DSCR = 0x105, 1468 NT_PPC_EBB = 0x106, 1469 NT_PPC_PMU = 0x107, 1470 NT_PPC_TM_CGPR = 0x108, 1471 NT_PPC_TM_CFPR = 0x109, 1472 NT_PPC_TM_CVMX = 0x10a, 1473 NT_PPC_TM_CVSX = 0x10b, 1474 NT_PPC_TM_SPR = 0x10c, 1475 NT_PPC_TM_CTAR = 0x10d, 1476 NT_PPC_TM_CPPR = 0x10e, 1477 NT_PPC_TM_CDSCR = 0x10f, 1478 1479 NT_386_TLS = 0x200, 1480 NT_386_IOPERM = 0x201, 1481 NT_X86_XSTATE = 0x202, 1482 1483 NT_S390_HIGH_GPRS = 0x300, 1484 NT_S390_TIMER = 0x301, 1485 NT_S390_TODCMP = 0x302, 1486 NT_S390_TODPREG = 0x303, 1487 NT_S390_CTRS = 0x304, 1488 NT_S390_PREFIX = 0x305, 1489 NT_S390_LAST_BREAK = 0x306, 1490 NT_S390_SYSTEM_CALL = 0x307, 1491 NT_S390_TDB = 0x308, 1492 NT_S390_VXRS_LOW = 0x309, 1493 NT_S390_VXRS_HIGH = 0x30a, 1494 NT_S390_GS_CB = 0x30b, 1495 NT_S390_GS_BC = 0x30c, 1496 1497 NT_ARM_VFP = 0x400, 1498 NT_ARM_TLS = 0x401, 1499 NT_ARM_HW_BREAK = 0x402, 1500 NT_ARM_HW_WATCH = 0x403, 1501 NT_ARM_SVE = 0x405, 1502 NT_ARM_PAC_MASK = 0x406, 1503 1504 NT_FILE = 0x46494c45, 1505 NT_PRXFPREG = 0x46e62b7f, 1506 NT_SIGINFO = 0x53494749, 1507 }; 1508 1509 // LLVM-specific notes. 1510 enum { 1511 NT_LLVM_HWASAN_GLOBALS = 3, 1512 }; 1513 1514 // GNU note types. 1515 enum { 1516 NT_GNU_ABI_TAG = 1, 1517 NT_GNU_HWCAP = 2, 1518 NT_GNU_BUILD_ID = 3, 1519 NT_GNU_GOLD_VERSION = 4, 1520 NT_GNU_PROPERTY_TYPE_0 = 5, 1521 }; 1522 1523 // Property types used in GNU_PROPERTY_TYPE_0 notes. 1524 enum : unsigned { 1525 GNU_PROPERTY_STACK_SIZE = 1, 1526 GNU_PROPERTY_NO_COPY_ON_PROTECTED = 2, 1527 GNU_PROPERTY_AARCH64_FEATURE_1_AND = 0xc0000000, 1528 GNU_PROPERTY_X86_FEATURE_1_AND = 0xc0000002, 1529 1530 GNU_PROPERTY_X86_UINT32_OR_LO = 0xc0008000, 1531 GNU_PROPERTY_X86_FEATURE_2_NEEDED = GNU_PROPERTY_X86_UINT32_OR_LO + 1, 1532 GNU_PROPERTY_X86_ISA_1_NEEDED = GNU_PROPERTY_X86_UINT32_OR_LO + 2, 1533 1534 GNU_PROPERTY_X86_UINT32_OR_AND_LO = 0xc0010000, 1535 GNU_PROPERTY_X86_FEATURE_2_USED = GNU_PROPERTY_X86_UINT32_OR_AND_LO + 1, 1536 GNU_PROPERTY_X86_ISA_1_USED = GNU_PROPERTY_X86_UINT32_OR_AND_LO + 2, 1537 }; 1538 1539 // aarch64 processor feature bits. 1540 enum : unsigned { 1541 GNU_PROPERTY_AARCH64_FEATURE_1_BTI = 1 << 0, 1542 GNU_PROPERTY_AARCH64_FEATURE_1_PAC = 1 << 1, 1543 }; 1544 1545 // x86 processor feature bits. 1546 enum : unsigned { 1547 GNU_PROPERTY_X86_FEATURE_1_IBT = 1 << 0, 1548 GNU_PROPERTY_X86_FEATURE_1_SHSTK = 1 << 1, 1549 1550 GNU_PROPERTY_X86_FEATURE_2_X86 = 1 << 0, 1551 GNU_PROPERTY_X86_FEATURE_2_X87 = 1 << 1, 1552 GNU_PROPERTY_X86_FEATURE_2_MMX = 1 << 2, 1553 GNU_PROPERTY_X86_FEATURE_2_XMM = 1 << 3, 1554 GNU_PROPERTY_X86_FEATURE_2_YMM = 1 << 4, 1555 GNU_PROPERTY_X86_FEATURE_2_ZMM = 1 << 5, 1556 GNU_PROPERTY_X86_FEATURE_2_FXSR = 1 << 6, 1557 GNU_PROPERTY_X86_FEATURE_2_XSAVE = 1 << 7, 1558 GNU_PROPERTY_X86_FEATURE_2_XSAVEOPT = 1 << 8, 1559 GNU_PROPERTY_X86_FEATURE_2_XSAVEC = 1 << 9, 1560 1561 GNU_PROPERTY_X86_ISA_1_BASELINE = 1 << 0, 1562 GNU_PROPERTY_X86_ISA_1_V2 = 1 << 1, 1563 GNU_PROPERTY_X86_ISA_1_V3 = 1 << 2, 1564 GNU_PROPERTY_X86_ISA_1_V4 = 1 << 3, 1565 }; 1566 1567 // FreeBSD note types. 1568 enum { 1569 NT_FREEBSD_ABI_TAG = 1, 1570 NT_FREEBSD_NOINIT_TAG = 2, 1571 NT_FREEBSD_ARCH_TAG = 3, 1572 NT_FREEBSD_FEATURE_CTL = 4, 1573 }; 1574 1575 // NT_FREEBSD_FEATURE_CTL values (see FreeBSD's sys/sys/elf_common.h). 1576 enum { 1577 NT_FREEBSD_FCTL_ASLR_DISABLE = 0x00000001, 1578 NT_FREEBSD_FCTL_PROTMAX_DISABLE = 0x00000002, 1579 NT_FREEBSD_FCTL_STKGAP_DISABLE = 0x00000004, 1580 NT_FREEBSD_FCTL_WXNEEDED = 0x00000008, 1581 NT_FREEBSD_FCTL_LA48 = 0x00000010, 1582 NT_FREEBSD_FCTL_ASG_DISABLE = 0x00000020, 1583 }; 1584 1585 // FreeBSD core note types. 1586 enum { 1587 NT_FREEBSD_THRMISC = 7, 1588 NT_FREEBSD_PROCSTAT_PROC = 8, 1589 NT_FREEBSD_PROCSTAT_FILES = 9, 1590 NT_FREEBSD_PROCSTAT_VMMAP = 10, 1591 NT_FREEBSD_PROCSTAT_GROUPS = 11, 1592 NT_FREEBSD_PROCSTAT_UMASK = 12, 1593 NT_FREEBSD_PROCSTAT_RLIMIT = 13, 1594 NT_FREEBSD_PROCSTAT_OSREL = 14, 1595 NT_FREEBSD_PROCSTAT_PSSTRINGS = 15, 1596 NT_FREEBSD_PROCSTAT_AUXV = 16, 1597 }; 1598 1599 // AMDGPU-specific section indices. 1600 enum { 1601 SHN_AMDGPU_LDS = 0xff00, // Variable in LDS; symbol encoded like SHN_COMMON 1602 }; 1603 1604 // AMD vendor specific notes. (Code Object V2) 1605 enum { 1606 NT_AMD_HSA_CODE_OBJECT_VERSION = 1, 1607 NT_AMD_HSA_HSAIL = 2, 1608 NT_AMD_HSA_ISA_VERSION = 3, 1609 // Note types with values between 4 and 9 (inclusive) are reserved. 1610 NT_AMD_HSA_METADATA = 10, 1611 NT_AMD_HSA_ISA_NAME = 11, 1612 NT_AMD_PAL_METADATA = 12 1613 }; 1614 1615 // AMDGPU vendor specific notes. (Code Object V3) 1616 enum { 1617 // Note types with values between 0 and 31 (inclusive) are reserved. 1618 NT_AMDGPU_METADATA = 32 1619 }; 1620 1621 enum { 1622 GNU_ABI_TAG_LINUX = 0, 1623 GNU_ABI_TAG_HURD = 1, 1624 GNU_ABI_TAG_SOLARIS = 2, 1625 GNU_ABI_TAG_FREEBSD = 3, 1626 GNU_ABI_TAG_NETBSD = 4, 1627 GNU_ABI_TAG_SYLLABLE = 5, 1628 GNU_ABI_TAG_NACL = 6, 1629 }; 1630 1631 constexpr const char *ELF_NOTE_GNU = "GNU"; 1632 1633 // Android packed relocation group flags. 1634 enum { 1635 RELOCATION_GROUPED_BY_INFO_FLAG = 1, 1636 RELOCATION_GROUPED_BY_OFFSET_DELTA_FLAG = 2, 1637 RELOCATION_GROUPED_BY_ADDEND_FLAG = 4, 1638 RELOCATION_GROUP_HAS_ADDEND_FLAG = 8, 1639 }; 1640 1641 // Compressed section header for ELF32. 1642 struct Elf32_Chdr { 1643 Elf32_Word ch_type; 1644 Elf32_Word ch_size; 1645 Elf32_Word ch_addralign; 1646 }; 1647 1648 // Compressed section header for ELF64. 1649 struct Elf64_Chdr { 1650 Elf64_Word ch_type; 1651 Elf64_Word ch_reserved; 1652 Elf64_Xword ch_size; 1653 Elf64_Xword ch_addralign; 1654 }; 1655 1656 // Note header for ELF32. 1657 struct Elf32_Nhdr { 1658 Elf32_Word n_namesz; 1659 Elf32_Word n_descsz; 1660 Elf32_Word n_type; 1661 }; 1662 1663 // Note header for ELF64. 1664 struct Elf64_Nhdr { 1665 Elf64_Word n_namesz; 1666 Elf64_Word n_descsz; 1667 Elf64_Word n_type; 1668 }; 1669 1670 // Legal values for ch_type field of compressed section header. 1671 enum { 1672 ELFCOMPRESS_ZLIB = 1, // ZLIB/DEFLATE algorithm. 1673 ELFCOMPRESS_LOOS = 0x60000000, // Start of OS-specific. 1674 ELFCOMPRESS_HIOS = 0x6fffffff, // End of OS-specific. 1675 ELFCOMPRESS_LOPROC = 0x70000000, // Start of processor-specific. 1676 ELFCOMPRESS_HIPROC = 0x7fffffff // End of processor-specific. 1677 }; 1678 1679 /// Convert an architecture name into ELF's e_machine value. 1680 uint16_t convertArchNameToEMachine(StringRef Arch); 1681 1682 /// Convert an ELF's e_machine value into an architecture name. 1683 StringRef convertEMachineToArchName(uint16_t EMachine); 1684 1685 } // end namespace ELF 1686 } // end namespace llvm 1687 1688 #endif // LLVM_BINARYFORMAT_ELF_H 1689