1 //===- llvm/BinaryFormat/ELF.h - ELF constants and structures ---*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This header contains common, non-processor-specific data structures and 11 // constants for the ELF file format. 12 // 13 // The details of the ELF32 bits in this file are largely based on the Tool 14 // Interface Standard (TIS) Executable and Linking Format (ELF) Specification 15 // Version 1.2, May 1995. The ELF64 stuff is based on ELF-64 Object File Format 16 // Version 1.5, Draft 2, May 1998 as well as OpenBSD header files. 17 // 18 //===----------------------------------------------------------------------===// 19 20 #ifndef LLVM_BINARYFORMAT_ELF_H 21 #define LLVM_BINARYFORMAT_ELF_H 22 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 enum { 113 ET_NONE = 0, // No file type 114 ET_REL = 1, // Relocatable file 115 ET_EXEC = 2, // Executable file 116 ET_DYN = 3, // Shared object file 117 ET_CORE = 4, // Core file 118 ET_LOPROC = 0xff00, // Beginning of processor-specific codes 119 ET_HIPROC = 0xffff // Processor-specific 120 }; 121 122 // Versioning 123 enum { EV_NONE = 0, EV_CURRENT = 1 }; 124 125 // Machine architectures 126 // See current registered ELF machine architectures at: 127 // http://www.uxsglobal.com/developers/gabi/latest/ch4.eheader.html 128 enum { 129 EM_NONE = 0, // No machine 130 EM_M32 = 1, // AT&T WE 32100 131 EM_SPARC = 2, // SPARC 132 EM_386 = 3, // Intel 386 133 EM_68K = 4, // Motorola 68000 134 EM_88K = 5, // Motorola 88000 135 EM_IAMCU = 6, // Intel MCU 136 EM_860 = 7, // Intel 80860 137 EM_MIPS = 8, // MIPS R3000 138 EM_S370 = 9, // IBM System/370 139 EM_MIPS_RS3_LE = 10, // MIPS RS3000 Little-endian 140 EM_PARISC = 15, // Hewlett-Packard PA-RISC 141 EM_VPP500 = 17, // Fujitsu VPP500 142 EM_SPARC32PLUS = 18, // Enhanced instruction set SPARC 143 EM_960 = 19, // Intel 80960 144 EM_PPC = 20, // PowerPC 145 EM_PPC64 = 21, // PowerPC64 146 EM_S390 = 22, // IBM System/390 147 EM_SPU = 23, // IBM SPU/SPC 148 EM_V800 = 36, // NEC V800 149 EM_FR20 = 37, // Fujitsu FR20 150 EM_RH32 = 38, // TRW RH-32 151 EM_RCE = 39, // Motorola RCE 152 EM_ARM = 40, // ARM 153 EM_ALPHA = 41, // DEC Alpha 154 EM_SH = 42, // Hitachi SH 155 EM_SPARCV9 = 43, // SPARC V9 156 EM_TRICORE = 44, // Siemens TriCore 157 EM_ARC = 45, // Argonaut RISC Core 158 EM_H8_300 = 46, // Hitachi H8/300 159 EM_H8_300H = 47, // Hitachi H8/300H 160 EM_H8S = 48, // Hitachi H8S 161 EM_H8_500 = 49, // Hitachi H8/500 162 EM_IA_64 = 50, // Intel IA-64 processor architecture 163 EM_MIPS_X = 51, // Stanford MIPS-X 164 EM_COLDFIRE = 52, // Motorola ColdFire 165 EM_68HC12 = 53, // Motorola M68HC12 166 EM_MMA = 54, // Fujitsu MMA Multimedia Accelerator 167 EM_PCP = 55, // Siemens PCP 168 EM_NCPU = 56, // Sony nCPU embedded RISC processor 169 EM_NDR1 = 57, // Denso NDR1 microprocessor 170 EM_STARCORE = 58, // Motorola Star*Core processor 171 EM_ME16 = 59, // Toyota ME16 processor 172 EM_ST100 = 60, // STMicroelectronics ST100 processor 173 EM_TINYJ = 61, // Advanced Logic Corp. TinyJ embedded processor family 174 EM_X86_64 = 62, // AMD x86-64 architecture 175 EM_PDSP = 63, // Sony DSP Processor 176 EM_PDP10 = 64, // Digital Equipment Corp. PDP-10 177 EM_PDP11 = 65, // Digital Equipment Corp. PDP-11 178 EM_FX66 = 66, // Siemens FX66 microcontroller 179 EM_ST9PLUS = 67, // STMicroelectronics ST9+ 8/16 bit microcontroller 180 EM_ST7 = 68, // STMicroelectronics ST7 8-bit microcontroller 181 EM_68HC16 = 69, // Motorola MC68HC16 Microcontroller 182 EM_68HC11 = 70, // Motorola MC68HC11 Microcontroller 183 EM_68HC08 = 71, // Motorola MC68HC08 Microcontroller 184 EM_68HC05 = 72, // Motorola MC68HC05 Microcontroller 185 EM_SVX = 73, // Silicon Graphics SVx 186 EM_ST19 = 74, // STMicroelectronics ST19 8-bit microcontroller 187 EM_VAX = 75, // Digital VAX 188 EM_CRIS = 76, // Axis Communications 32-bit embedded processor 189 EM_JAVELIN = 77, // Infineon Technologies 32-bit embedded processor 190 EM_FIREPATH = 78, // Element 14 64-bit DSP Processor 191 EM_ZSP = 79, // LSI Logic 16-bit DSP Processor 192 EM_MMIX = 80, // Donald Knuth's educational 64-bit processor 193 EM_HUANY = 81, // Harvard University machine-independent object files 194 EM_PRISM = 82, // SiTera Prism 195 EM_AVR = 83, // Atmel AVR 8-bit microcontroller 196 EM_FR30 = 84, // Fujitsu FR30 197 EM_D10V = 85, // Mitsubishi D10V 198 EM_D30V = 86, // Mitsubishi D30V 199 EM_V850 = 87, // NEC v850 200 EM_M32R = 88, // Mitsubishi M32R 201 EM_MN10300 = 89, // Matsushita MN10300 202 EM_MN10200 = 90, // Matsushita MN10200 203 EM_PJ = 91, // picoJava 204 EM_OPENRISC = 92, // OpenRISC 32-bit embedded processor 205 EM_ARC_COMPACT = 93, // ARC International ARCompact processor (old 206 // spelling/synonym: EM_ARC_A5) 207 EM_XTENSA = 94, // Tensilica Xtensa Architecture 208 EM_VIDEOCORE = 95, // Alphamosaic VideoCore processor 209 EM_TMM_GPP = 96, // Thompson Multimedia General Purpose Processor 210 EM_NS32K = 97, // National Semiconductor 32000 series 211 EM_TPC = 98, // Tenor Network TPC processor 212 EM_SNP1K = 99, // Trebia SNP 1000 processor 213 EM_ST200 = 100, // STMicroelectronics (www.st.com) ST200 214 EM_IP2K = 101, // Ubicom IP2xxx microcontroller family 215 EM_MAX = 102, // MAX Processor 216 EM_CR = 103, // National Semiconductor CompactRISC microprocessor 217 EM_F2MC16 = 104, // Fujitsu F2MC16 218 EM_MSP430 = 105, // Texas Instruments embedded microcontroller msp430 219 EM_BLACKFIN = 106, // Analog Devices Blackfin (DSP) processor 220 EM_SE_C33 = 107, // S1C33 Family of Seiko Epson processors 221 EM_SEP = 108, // Sharp embedded microprocessor 222 EM_ARCA = 109, // Arca RISC Microprocessor 223 EM_UNICORE = 110, // Microprocessor series from PKU-Unity Ltd. and MPRC 224 // of Peking University 225 EM_EXCESS = 111, // eXcess: 16/32/64-bit configurable embedded CPU 226 EM_DXP = 112, // Icera Semiconductor Inc. Deep Execution Processor 227 EM_ALTERA_NIOS2 = 113, // Altera Nios II soft-core processor 228 EM_CRX = 114, // National Semiconductor CompactRISC CRX 229 EM_XGATE = 115, // Motorola XGATE embedded processor 230 EM_C166 = 116, // Infineon C16x/XC16x processor 231 EM_M16C = 117, // Renesas M16C series microprocessors 232 EM_DSPIC30F = 118, // Microchip Technology dsPIC30F Digital Signal 233 // Controller 234 EM_CE = 119, // Freescale Communication Engine RISC core 235 EM_M32C = 120, // Renesas M32C series microprocessors 236 EM_TSK3000 = 131, // Altium TSK3000 core 237 EM_RS08 = 132, // Freescale RS08 embedded processor 238 EM_SHARC = 133, // Analog Devices SHARC family of 32-bit DSP 239 // processors 240 EM_ECOG2 = 134, // Cyan Technology eCOG2 microprocessor 241 EM_SCORE7 = 135, // Sunplus S+core7 RISC processor 242 EM_DSP24 = 136, // New Japan Radio (NJR) 24-bit DSP Processor 243 EM_VIDEOCORE3 = 137, // Broadcom VideoCore III processor 244 EM_LATTICEMICO32 = 138, // RISC processor for Lattice FPGA architecture 245 EM_SE_C17 = 139, // Seiko Epson C17 family 246 EM_TI_C6000 = 140, // The Texas Instruments TMS320C6000 DSP family 247 EM_TI_C2000 = 141, // The Texas Instruments TMS320C2000 DSP family 248 EM_TI_C5500 = 142, // The Texas Instruments TMS320C55x DSP family 249 EM_MMDSP_PLUS = 160, // STMicroelectronics 64bit VLIW Data Signal Processor 250 EM_CYPRESS_M8C = 161, // Cypress M8C microprocessor 251 EM_R32C = 162, // Renesas R32C series microprocessors 252 EM_TRIMEDIA = 163, // NXP Semiconductors TriMedia architecture family 253 EM_HEXAGON = 164, // Qualcomm Hexagon processor 254 EM_8051 = 165, // Intel 8051 and variants 255 EM_STXP7X = 166, // STMicroelectronics STxP7x family of configurable 256 // and extensible RISC processors 257 EM_NDS32 = 167, // Andes Technology compact code size embedded RISC 258 // processor family 259 EM_ECOG1 = 168, // Cyan Technology eCOG1X family 260 EM_ECOG1X = 168, // Cyan Technology eCOG1X family 261 EM_MAXQ30 = 169, // Dallas Semiconductor MAXQ30 Core Micro-controllers 262 EM_XIMO16 = 170, // New Japan Radio (NJR) 16-bit DSP Processor 263 EM_MANIK = 171, // M2000 Reconfigurable RISC Microprocessor 264 EM_CRAYNV2 = 172, // Cray Inc. NV2 vector architecture 265 EM_RX = 173, // Renesas RX family 266 EM_METAG = 174, // Imagination Technologies META processor 267 // architecture 268 EM_MCST_ELBRUS = 175, // MCST Elbrus general purpose hardware architecture 269 EM_ECOG16 = 176, // Cyan Technology eCOG16 family 270 EM_CR16 = 177, // National Semiconductor CompactRISC CR16 16-bit 271 // microprocessor 272 EM_ETPU = 178, // Freescale Extended Time Processing Unit 273 EM_SLE9X = 179, // Infineon Technologies SLE9X core 274 EM_L10M = 180, // Intel L10M 275 EM_K10M = 181, // Intel K10M 276 EM_AARCH64 = 183, // ARM AArch64 277 EM_AVR32 = 185, // Atmel Corporation 32-bit microprocessor family 278 EM_STM8 = 186, // STMicroeletronics STM8 8-bit microcontroller 279 EM_TILE64 = 187, // Tilera TILE64 multicore architecture family 280 EM_TILEPRO = 188, // Tilera TILEPro multicore architecture family 281 EM_CUDA = 190, // NVIDIA CUDA architecture 282 EM_TILEGX = 191, // Tilera TILE-Gx multicore architecture family 283 EM_CLOUDSHIELD = 192, // CloudShield architecture family 284 EM_COREA_1ST = 193, // KIPO-KAIST Core-A 1st generation processor family 285 EM_COREA_2ND = 194, // KIPO-KAIST Core-A 2nd generation processor family 286 EM_ARC_COMPACT2 = 195, // Synopsys ARCompact V2 287 EM_OPEN8 = 196, // Open8 8-bit RISC soft processor core 288 EM_RL78 = 197, // Renesas RL78 family 289 EM_VIDEOCORE5 = 198, // Broadcom VideoCore V processor 290 EM_78KOR = 199, // Renesas 78KOR family 291 EM_56800EX = 200, // Freescale 56800EX Digital Signal Controller (DSC) 292 EM_BA1 = 201, // Beyond BA1 CPU architecture 293 EM_BA2 = 202, // Beyond BA2 CPU architecture 294 EM_XCORE = 203, // XMOS xCORE processor family 295 EM_MCHP_PIC = 204, // Microchip 8-bit PIC(r) family 296 EM_INTEL205 = 205, // Reserved by Intel 297 EM_INTEL206 = 206, // Reserved by Intel 298 EM_INTEL207 = 207, // Reserved by Intel 299 EM_INTEL208 = 208, // Reserved by Intel 300 EM_INTEL209 = 209, // Reserved by Intel 301 EM_KM32 = 210, // KM211 KM32 32-bit processor 302 EM_KMX32 = 211, // KM211 KMX32 32-bit processor 303 EM_KMX16 = 212, // KM211 KMX16 16-bit processor 304 EM_KMX8 = 213, // KM211 KMX8 8-bit processor 305 EM_KVARC = 214, // KM211 KVARC processor 306 EM_CDP = 215, // Paneve CDP architecture family 307 EM_COGE = 216, // Cognitive Smart Memory Processor 308 EM_COOL = 217, // iCelero CoolEngine 309 EM_NORC = 218, // Nanoradio Optimized RISC 310 EM_CSR_KALIMBA = 219, // CSR Kalimba architecture family 311 EM_AMDGPU = 224, // AMD GPU architecture 312 EM_RISCV = 243, // RISC-V 313 EM_LANAI = 244, // Lanai 32-bit processor 314 EM_BPF = 247, // Linux kernel bpf virtual machine 315 316 // A request has been made to the maintainer of the official registry for 317 // such numbers for an official value for WebAssembly. As soon as one is 318 // allocated, this enum will be updated to use it. 319 EM_WEBASSEMBLY = 0x4157, // WebAssembly architecture 320 }; 321 322 // Object file classes. 323 enum { 324 ELFCLASSNONE = 0, 325 ELFCLASS32 = 1, // 32-bit object file 326 ELFCLASS64 = 2 // 64-bit object file 327 }; 328 329 // Object file byte orderings. 330 enum { 331 ELFDATANONE = 0, // Invalid data encoding. 332 ELFDATA2LSB = 1, // Little-endian object file 333 ELFDATA2MSB = 2 // Big-endian object file 334 }; 335 336 // OS ABI identification. 337 enum { 338 ELFOSABI_NONE = 0, // UNIX System V ABI 339 ELFOSABI_HPUX = 1, // HP-UX operating system 340 ELFOSABI_NETBSD = 2, // NetBSD 341 ELFOSABI_GNU = 3, // GNU/Linux 342 ELFOSABI_LINUX = 3, // Historical alias for ELFOSABI_GNU. 343 ELFOSABI_HURD = 4, // GNU/Hurd 344 ELFOSABI_SOLARIS = 6, // Solaris 345 ELFOSABI_AIX = 7, // AIX 346 ELFOSABI_IRIX = 8, // IRIX 347 ELFOSABI_FREEBSD = 9, // FreeBSD 348 ELFOSABI_TRU64 = 10, // TRU64 UNIX 349 ELFOSABI_MODESTO = 11, // Novell Modesto 350 ELFOSABI_OPENBSD = 12, // OpenBSD 351 ELFOSABI_OPENVMS = 13, // OpenVMS 352 ELFOSABI_NSK = 14, // Hewlett-Packard Non-Stop Kernel 353 ELFOSABI_AROS = 15, // AROS 354 ELFOSABI_FENIXOS = 16, // FenixOS 355 ELFOSABI_CLOUDABI = 17, // Nuxi CloudABI 356 ELFOSABI_C6000_ELFABI = 64, // Bare-metal TMS320C6000 357 ELFOSABI_AMDGPU_HSA = 64, // AMD HSA runtime 358 ELFOSABI_C6000_LINUX = 65, // Linux TMS320C6000 359 ELFOSABI_ARM = 97, // ARM 360 ELFOSABI_STANDALONE = 255 // Standalone (embedded) application 361 }; 362 363 #define ELF_RELOC(name, value) name = value, 364 365 // X86_64 relocations. 366 enum { 367 #include "ELFRelocs/x86_64.def" 368 }; 369 370 // i386 relocations. 371 enum { 372 #include "ELFRelocs/i386.def" 373 }; 374 375 // ELF Relocation types for PPC32 376 enum { 377 #include "ELFRelocs/PowerPC.def" 378 }; 379 380 // Specific e_flags for PPC64 381 enum { 382 // e_flags bits specifying ABI: 383 // 1 for original ABI using function descriptors, 384 // 2 for revised ABI without function descriptors, 385 // 0 for unspecified or not using any features affected by the differences. 386 EF_PPC64_ABI = 3 387 }; 388 389 // Special values for the st_other field in the symbol table entry for PPC64. 390 enum { 391 STO_PPC64_LOCAL_BIT = 5, 392 STO_PPC64_LOCAL_MASK = (7 << STO_PPC64_LOCAL_BIT) 393 }; 394 static inline int64_t decodePPC64LocalEntryOffset(unsigned Other) { 395 unsigned Val = (Other & STO_PPC64_LOCAL_MASK) >> STO_PPC64_LOCAL_BIT; 396 return ((1 << Val) >> 2) << 2; 397 } 398 static inline unsigned encodePPC64LocalEntryOffset(int64_t Offset) { 399 unsigned Val = 400 (Offset >= 4 * 4 ? (Offset >= 8 * 4 ? (Offset >= 16 * 4 ? 6 : 5) : 4) 401 : (Offset >= 2 * 4 ? 3 : (Offset >= 1 * 4 ? 2 : 0))); 402 return Val << STO_PPC64_LOCAL_BIT; 403 } 404 405 // ELF Relocation types for PPC64 406 enum { 407 #include "ELFRelocs/PowerPC64.def" 408 }; 409 410 // ELF Relocation types for AArch64 411 enum { 412 #include "ELFRelocs/AArch64.def" 413 }; 414 415 // ARM Specific e_flags 416 enum : unsigned { 417 EF_ARM_SOFT_FLOAT = 0x00000200U, 418 EF_ARM_VFP_FLOAT = 0x00000400U, 419 EF_ARM_EABI_UNKNOWN = 0x00000000U, 420 EF_ARM_EABI_VER1 = 0x01000000U, 421 EF_ARM_EABI_VER2 = 0x02000000U, 422 EF_ARM_EABI_VER3 = 0x03000000U, 423 EF_ARM_EABI_VER4 = 0x04000000U, 424 EF_ARM_EABI_VER5 = 0x05000000U, 425 EF_ARM_EABIMASK = 0xFF000000U 426 }; 427 428 // ELF Relocation types for ARM 429 enum { 430 #include "ELFRelocs/ARM.def" 431 }; 432 433 // AVR specific e_flags 434 enum : unsigned { 435 EF_AVR_ARCH_AVR1 = 1, 436 EF_AVR_ARCH_AVR2 = 2, 437 EF_AVR_ARCH_AVR25 = 25, 438 EF_AVR_ARCH_AVR3 = 3, 439 EF_AVR_ARCH_AVR31 = 31, 440 EF_AVR_ARCH_AVR35 = 35, 441 EF_AVR_ARCH_AVR4 = 4, 442 EF_AVR_ARCH_AVR5 = 5, 443 EF_AVR_ARCH_AVR51 = 51, 444 EF_AVR_ARCH_AVR6 = 6, 445 EF_AVR_ARCH_AVRTINY = 100, 446 EF_AVR_ARCH_XMEGA1 = 101, 447 EF_AVR_ARCH_XMEGA2 = 102, 448 EF_AVR_ARCH_XMEGA3 = 103, 449 EF_AVR_ARCH_XMEGA4 = 104, 450 EF_AVR_ARCH_XMEGA5 = 105, 451 EF_AVR_ARCH_XMEGA6 = 106, 452 EF_AVR_ARCH_XMEGA7 = 107 453 }; 454 455 // ELF Relocation types for AVR 456 enum { 457 #include "ELFRelocs/AVR.def" 458 }; 459 460 // Mips Specific e_flags 461 enum : unsigned { 462 EF_MIPS_NOREORDER = 0x00000001, // Don't reorder instructions 463 EF_MIPS_PIC = 0x00000002, // Position independent code 464 EF_MIPS_CPIC = 0x00000004, // Call object with Position independent code 465 EF_MIPS_ABI2 = 0x00000020, // File uses N32 ABI 466 EF_MIPS_32BITMODE = 0x00000100, // Code compiled for a 64-bit machine 467 // in 32-bit mode 468 EF_MIPS_FP64 = 0x00000200, // Code compiled for a 32-bit machine 469 // but uses 64-bit FP registers 470 EF_MIPS_NAN2008 = 0x00000400, // Uses IEE 754-2008 NaN encoding 471 472 // ABI flags 473 EF_MIPS_ABI_O32 = 0x00001000, // This file follows the first MIPS 32 bit ABI 474 EF_MIPS_ABI_O64 = 0x00002000, // O32 ABI extended for 64-bit architecture. 475 EF_MIPS_ABI_EABI32 = 0x00003000, // EABI in 32 bit mode. 476 EF_MIPS_ABI_EABI64 = 0x00004000, // EABI in 64 bit mode. 477 EF_MIPS_ABI = 0x0000f000, // Mask for selecting EF_MIPS_ABI_ variant. 478 479 // MIPS machine variant 480 EF_MIPS_MACH_NONE = 0x00000000, // A standard MIPS implementation. 481 EF_MIPS_MACH_3900 = 0x00810000, // Toshiba R3900 482 EF_MIPS_MACH_4010 = 0x00820000, // LSI R4010 483 EF_MIPS_MACH_4100 = 0x00830000, // NEC VR4100 484 EF_MIPS_MACH_4650 = 0x00850000, // MIPS R4650 485 EF_MIPS_MACH_4120 = 0x00870000, // NEC VR4120 486 EF_MIPS_MACH_4111 = 0x00880000, // NEC VR4111/VR4181 487 EF_MIPS_MACH_SB1 = 0x008a0000, // Broadcom SB-1 488 EF_MIPS_MACH_OCTEON = 0x008b0000, // Cavium Networks Octeon 489 EF_MIPS_MACH_XLR = 0x008c0000, // RMI Xlr 490 EF_MIPS_MACH_OCTEON2 = 0x008d0000, // Cavium Networks Octeon2 491 EF_MIPS_MACH_OCTEON3 = 0x008e0000, // Cavium Networks Octeon3 492 EF_MIPS_MACH_5400 = 0x00910000, // NEC VR5400 493 EF_MIPS_MACH_5900 = 0x00920000, // MIPS R5900 494 EF_MIPS_MACH_5500 = 0x00980000, // NEC VR5500 495 EF_MIPS_MACH_9000 = 0x00990000, // Unknown 496 EF_MIPS_MACH_LS2E = 0x00a00000, // ST Microelectronics Loongson 2E 497 EF_MIPS_MACH_LS2F = 0x00a10000, // ST Microelectronics Loongson 2F 498 EF_MIPS_MACH_LS3A = 0x00a20000, // Loongson 3A 499 EF_MIPS_MACH = 0x00ff0000, // EF_MIPS_MACH_xxx selection mask 500 501 // ARCH_ASE 502 EF_MIPS_MICROMIPS = 0x02000000, // microMIPS 503 EF_MIPS_ARCH_ASE_M16 = 0x04000000, // Has Mips-16 ISA extensions 504 EF_MIPS_ARCH_ASE_MDMX = 0x08000000, // Has MDMX multimedia extensions 505 EF_MIPS_ARCH_ASE = 0x0f000000, // Mask for EF_MIPS_ARCH_ASE_xxx flags 506 507 // ARCH 508 EF_MIPS_ARCH_1 = 0x00000000, // MIPS1 instruction set 509 EF_MIPS_ARCH_2 = 0x10000000, // MIPS2 instruction set 510 EF_MIPS_ARCH_3 = 0x20000000, // MIPS3 instruction set 511 EF_MIPS_ARCH_4 = 0x30000000, // MIPS4 instruction set 512 EF_MIPS_ARCH_5 = 0x40000000, // MIPS5 instruction set 513 EF_MIPS_ARCH_32 = 0x50000000, // MIPS32 instruction set per linux not elf.h 514 EF_MIPS_ARCH_64 = 0x60000000, // MIPS64 instruction set per linux not elf.h 515 EF_MIPS_ARCH_32R2 = 0x70000000, // mips32r2, mips32r3, mips32r5 516 EF_MIPS_ARCH_64R2 = 0x80000000, // mips64r2, mips64r3, mips64r5 517 EF_MIPS_ARCH_32R6 = 0x90000000, // mips32r6 518 EF_MIPS_ARCH_64R6 = 0xa0000000, // mips64r6 519 EF_MIPS_ARCH = 0xf0000000 // Mask for applying EF_MIPS_ARCH_ variant 520 }; 521 522 // ELF Relocation types for Mips 523 enum { 524 #include "ELFRelocs/Mips.def" 525 }; 526 527 // Special values for the st_other field in the symbol table entry for MIPS. 528 enum { 529 STO_MIPS_OPTIONAL = 0x04, // Symbol whose definition is optional 530 STO_MIPS_PLT = 0x08, // PLT entry related dynamic table record 531 STO_MIPS_PIC = 0x20, // PIC func in an object mixes PIC/non-PIC 532 STO_MIPS_MICROMIPS = 0x80, // MIPS Specific ISA for MicroMips 533 STO_MIPS_MIPS16 = 0xf0 // MIPS Specific ISA for Mips16 534 }; 535 536 // .MIPS.options section descriptor kinds 537 enum { 538 ODK_NULL = 0, // Undefined 539 ODK_REGINFO = 1, // Register usage information 540 ODK_EXCEPTIONS = 2, // Exception processing options 541 ODK_PAD = 3, // Section padding options 542 ODK_HWPATCH = 4, // Hardware patches applied 543 ODK_FILL = 5, // Linker fill value 544 ODK_TAGS = 6, // Space for tool identification 545 ODK_HWAND = 7, // Hardware AND patches applied 546 ODK_HWOR = 8, // Hardware OR patches applied 547 ODK_GP_GROUP = 9, // GP group to use for text/data sections 548 ODK_IDENT = 10, // ID information 549 ODK_PAGESIZE = 11 // Page size information 550 }; 551 552 // Hexagon-specific e_flags 553 enum { 554 // Object processor version flags, bits[11:0] 555 EF_HEXAGON_MACH_V2 = 0x00000001, // Hexagon V2 556 EF_HEXAGON_MACH_V3 = 0x00000002, // Hexagon V3 557 EF_HEXAGON_MACH_V4 = 0x00000003, // Hexagon V4 558 EF_HEXAGON_MACH_V5 = 0x00000004, // Hexagon V5 559 EF_HEXAGON_MACH_V55 = 0x00000005, // Hexagon V55 560 EF_HEXAGON_MACH_V60 = 0x00000060, // Hexagon V60 561 EF_HEXAGON_MACH_V62 = 0x00000062, // Hexagon V62 562 563 // Highest ISA version flags 564 EF_HEXAGON_ISA_MACH = 0x00000000, // Same as specified in bits[11:0] 565 // of e_flags 566 EF_HEXAGON_ISA_V2 = 0x00000010, // Hexagon V2 ISA 567 EF_HEXAGON_ISA_V3 = 0x00000020, // Hexagon V3 ISA 568 EF_HEXAGON_ISA_V4 = 0x00000030, // Hexagon V4 ISA 569 EF_HEXAGON_ISA_V5 = 0x00000040, // Hexagon V5 ISA 570 EF_HEXAGON_ISA_V55 = 0x00000050, // Hexagon V55 ISA 571 EF_HEXAGON_ISA_V60 = 0x00000060, // Hexagon V60 ISA 572 EF_HEXAGON_ISA_V62 = 0x00000062, // Hexagon V62 ISA 573 }; 574 575 // Hexagon-specific section indexes for common small data 576 enum { 577 SHN_HEXAGON_SCOMMON = 0xff00, // Other access sizes 578 SHN_HEXAGON_SCOMMON_1 = 0xff01, // Byte-sized access 579 SHN_HEXAGON_SCOMMON_2 = 0xff02, // Half-word-sized access 580 SHN_HEXAGON_SCOMMON_4 = 0xff03, // Word-sized access 581 SHN_HEXAGON_SCOMMON_8 = 0xff04 // Double-word-size access 582 }; 583 584 // ELF Relocation types for Hexagon 585 enum { 586 #include "ELFRelocs/Hexagon.def" 587 }; 588 589 // ELF Relocation type for Lanai. 590 enum { 591 #include "ELFRelocs/Lanai.def" 592 }; 593 594 // ELF Relocation types for RISC-V 595 enum { 596 #include "ELFRelocs/RISCV.def" 597 }; 598 599 // ELF Relocation types for S390/zSeries 600 enum { 601 #include "ELFRelocs/SystemZ.def" 602 }; 603 604 // ELF Relocation type for Sparc. 605 enum { 606 #include "ELFRelocs/Sparc.def" 607 }; 608 609 // ELF Relocation types for WebAssembly 610 enum { 611 #include "ELFRelocs/WebAssembly.def" 612 }; 613 614 // ELF Relocation types for AMDGPU 615 enum { 616 #include "ELFRelocs/AMDGPU.def" 617 }; 618 619 // ELF Relocation types for BPF 620 enum { 621 #include "ELFRelocs/BPF.def" 622 }; 623 624 #undef ELF_RELOC 625 626 // Section header. 627 struct Elf32_Shdr { 628 Elf32_Word sh_name; // Section name (index into string table) 629 Elf32_Word sh_type; // Section type (SHT_*) 630 Elf32_Word sh_flags; // Section flags (SHF_*) 631 Elf32_Addr sh_addr; // Address where section is to be loaded 632 Elf32_Off sh_offset; // File offset of section data, in bytes 633 Elf32_Word sh_size; // Size of section, in bytes 634 Elf32_Word sh_link; // Section type-specific header table index link 635 Elf32_Word sh_info; // Section type-specific extra information 636 Elf32_Word sh_addralign; // Section address alignment 637 Elf32_Word sh_entsize; // Size of records contained within the section 638 }; 639 640 // Section header for ELF64 - same fields as ELF32, different types. 641 struct Elf64_Shdr { 642 Elf64_Word sh_name; 643 Elf64_Word sh_type; 644 Elf64_Xword sh_flags; 645 Elf64_Addr sh_addr; 646 Elf64_Off sh_offset; 647 Elf64_Xword sh_size; 648 Elf64_Word sh_link; 649 Elf64_Word sh_info; 650 Elf64_Xword sh_addralign; 651 Elf64_Xword sh_entsize; 652 }; 653 654 // Special section indices. 655 enum { 656 SHN_UNDEF = 0, // Undefined, missing, irrelevant, or meaningless 657 SHN_LORESERVE = 0xff00, // Lowest reserved index 658 SHN_LOPROC = 0xff00, // Lowest processor-specific index 659 SHN_HIPROC = 0xff1f, // Highest processor-specific index 660 SHN_LOOS = 0xff20, // Lowest operating system-specific index 661 SHN_HIOS = 0xff3f, // Highest operating system-specific index 662 SHN_ABS = 0xfff1, // Symbol has absolute value; does not need relocation 663 SHN_COMMON = 0xfff2, // FORTRAN COMMON or C external global variables 664 SHN_XINDEX = 0xffff, // Mark that the index is >= SHN_LORESERVE 665 SHN_HIRESERVE = 0xffff // Highest reserved index 666 }; 667 668 // Section types. 669 enum : unsigned { 670 SHT_NULL = 0, // No associated section (inactive entry). 671 SHT_PROGBITS = 1, // Program-defined contents. 672 SHT_SYMTAB = 2, // Symbol table. 673 SHT_STRTAB = 3, // String table. 674 SHT_RELA = 4, // Relocation entries; explicit addends. 675 SHT_HASH = 5, // Symbol hash table. 676 SHT_DYNAMIC = 6, // Information for dynamic linking. 677 SHT_NOTE = 7, // Information about the file. 678 SHT_NOBITS = 8, // Data occupies no space in the file. 679 SHT_REL = 9, // Relocation entries; no explicit addends. 680 SHT_SHLIB = 10, // Reserved. 681 SHT_DYNSYM = 11, // Symbol table. 682 SHT_INIT_ARRAY = 14, // Pointers to initialization functions. 683 SHT_FINI_ARRAY = 15, // Pointers to termination functions. 684 SHT_PREINIT_ARRAY = 16, // Pointers to pre-init functions. 685 SHT_GROUP = 17, // Section group. 686 SHT_SYMTAB_SHNDX = 18, // Indices for SHN_XINDEX entries. 687 SHT_LOOS = 0x60000000, // Lowest operating system-specific type. 688 SHT_LLVM_ODRTAB = 0x6fff4c00, // LLVM ODR table. 689 SHT_GNU_ATTRIBUTES = 0x6ffffff5, // Object attributes. 690 SHT_GNU_HASH = 0x6ffffff6, // GNU-style hash table. 691 SHT_GNU_verdef = 0x6ffffffd, // GNU version definitions. 692 SHT_GNU_verneed = 0x6ffffffe, // GNU version references. 693 SHT_GNU_versym = 0x6fffffff, // GNU symbol versions table. 694 SHT_HIOS = 0x6fffffff, // Highest operating system-specific type. 695 SHT_LOPROC = 0x70000000, // Lowest processor arch-specific type. 696 // Fixme: All this is duplicated in MCSectionELF. Why?? 697 // Exception Index table 698 SHT_ARM_EXIDX = 0x70000001U, 699 // BPABI DLL dynamic linking pre-emption map 700 SHT_ARM_PREEMPTMAP = 0x70000002U, 701 // Object file compatibility attributes 702 SHT_ARM_ATTRIBUTES = 0x70000003U, 703 SHT_ARM_DEBUGOVERLAY = 0x70000004U, 704 SHT_ARM_OVERLAYSECTION = 0x70000005U, 705 SHT_HEX_ORDERED = 0x70000000, // Link editor is to sort the entries in 706 // this section based on their sizes 707 SHT_X86_64_UNWIND = 0x70000001, // Unwind information 708 709 SHT_MIPS_REGINFO = 0x70000006, // Register usage information 710 SHT_MIPS_OPTIONS = 0x7000000d, // General options 711 SHT_MIPS_DWARF = 0x7000001e, // DWARF debugging section. 712 SHT_MIPS_ABIFLAGS = 0x7000002a, // ABI information. 713 714 SHT_HIPROC = 0x7fffffff, // Highest processor arch-specific type. 715 SHT_LOUSER = 0x80000000, // Lowest type reserved for applications. 716 SHT_HIUSER = 0xffffffff // Highest type reserved for applications. 717 }; 718 719 // Section flags. 720 enum : unsigned { 721 // Section data should be writable during execution. 722 SHF_WRITE = 0x1, 723 724 // Section occupies memory during program execution. 725 SHF_ALLOC = 0x2, 726 727 // Section contains executable machine instructions. 728 SHF_EXECINSTR = 0x4, 729 730 // The data in this section may be merged. 731 SHF_MERGE = 0x10, 732 733 // The data in this section is null-terminated strings. 734 SHF_STRINGS = 0x20, 735 736 // A field in this section holds a section header table index. 737 SHF_INFO_LINK = 0x40U, 738 739 // Adds special ordering requirements for link editors. 740 SHF_LINK_ORDER = 0x80U, 741 742 // This section requires special OS-specific processing to avoid incorrect 743 // behavior. 744 SHF_OS_NONCONFORMING = 0x100U, 745 746 // This section is a member of a section group. 747 SHF_GROUP = 0x200U, 748 749 // This section holds Thread-Local Storage. 750 SHF_TLS = 0x400U, 751 752 // Identifies a section containing compressed data. 753 SHF_COMPRESSED = 0x800U, 754 755 // This section is excluded from the final executable or shared library. 756 SHF_EXCLUDE = 0x80000000U, 757 758 // Start of target-specific flags. 759 760 SHF_MASKOS = 0x0ff00000, 761 762 // Bits indicating processor-specific flags. 763 SHF_MASKPROC = 0xf0000000, 764 765 /// All sections with the "d" flag are grouped together by the linker to form 766 /// the data section and the dp register is set to the start of the section by 767 /// the boot code. 768 XCORE_SHF_DP_SECTION = 0x10000000, 769 770 /// All sections with the "c" flag are grouped together by the linker to form 771 /// the constant pool and the cp register is set to the start of the constant 772 /// pool by the boot code. 773 XCORE_SHF_CP_SECTION = 0x20000000, 774 775 // If an object file section does not have this flag set, then it may not hold 776 // more than 2GB and can be freely referred to in objects using smaller code 777 // models. Otherwise, only objects using larger code models can refer to them. 778 // For example, a medium code model object can refer to data in a section that 779 // sets this flag besides being able to refer to data in a section that does 780 // not set it; likewise, a small code model object can refer only to code in a 781 // section that does not set this flag. 782 SHF_X86_64_LARGE = 0x10000000, 783 784 // All sections with the GPREL flag are grouped into a global data area 785 // for faster accesses 786 SHF_HEX_GPREL = 0x10000000, 787 788 // Section contains text/data which may be replicated in other sections. 789 // Linker must retain only one copy. 790 SHF_MIPS_NODUPES = 0x01000000, 791 792 // Linker must generate implicit hidden weak names. 793 SHF_MIPS_NAMES = 0x02000000, 794 795 // Section data local to process. 796 SHF_MIPS_LOCAL = 0x04000000, 797 798 // Do not strip this section. 799 SHF_MIPS_NOSTRIP = 0x08000000, 800 801 // Section must be part of global data area. 802 SHF_MIPS_GPREL = 0x10000000, 803 804 // This section should be merged. 805 SHF_MIPS_MERGE = 0x20000000, 806 807 // Address size to be inferred from section entry size. 808 SHF_MIPS_ADDR = 0x40000000, 809 810 // Section data is string data by default. 811 SHF_MIPS_STRING = 0x80000000, 812 813 // Make code section unreadable when in execute-only mode 814 SHF_ARM_PURECODE = 0x20000000 815 }; 816 817 // Section Group Flags 818 enum : unsigned { 819 GRP_COMDAT = 0x1, 820 GRP_MASKOS = 0x0ff00000, 821 GRP_MASKPROC = 0xf0000000 822 }; 823 824 // Symbol table entries for ELF32. 825 struct Elf32_Sym { 826 Elf32_Word st_name; // Symbol name (index into string table) 827 Elf32_Addr st_value; // Value or address associated with the symbol 828 Elf32_Word st_size; // Size of the symbol 829 unsigned char st_info; // Symbol's type and binding attributes 830 unsigned char st_other; // Must be zero; reserved 831 Elf32_Half st_shndx; // Which section (header table index) it's defined in 832 833 // These accessors and mutators correspond to the ELF32_ST_BIND, 834 // ELF32_ST_TYPE, and ELF32_ST_INFO macros defined in the ELF specification: 835 unsigned char getBinding() const { return st_info >> 4; } 836 unsigned char getType() const { return st_info & 0x0f; } 837 void setBinding(unsigned char b) { setBindingAndType(b, getType()); } 838 void setType(unsigned char t) { setBindingAndType(getBinding(), t); } 839 void setBindingAndType(unsigned char b, unsigned char t) { 840 st_info = (b << 4) + (t & 0x0f); 841 } 842 }; 843 844 // Symbol table entries for ELF64. 845 struct Elf64_Sym { 846 Elf64_Word st_name; // Symbol name (index into string table) 847 unsigned char st_info; // Symbol's type and binding attributes 848 unsigned char st_other; // Must be zero; reserved 849 Elf64_Half st_shndx; // Which section (header tbl index) it's defined in 850 Elf64_Addr st_value; // Value or address associated with the symbol 851 Elf64_Xword st_size; // Size of the symbol 852 853 // These accessors and mutators are identical to those defined for ELF32 854 // symbol table entries. 855 unsigned char getBinding() const { return st_info >> 4; } 856 unsigned char getType() const { return st_info & 0x0f; } 857 void setBinding(unsigned char b) { setBindingAndType(b, getType()); } 858 void setType(unsigned char t) { setBindingAndType(getBinding(), t); } 859 void setBindingAndType(unsigned char b, unsigned char t) { 860 st_info = (b << 4) + (t & 0x0f); 861 } 862 }; 863 864 // The size (in bytes) of symbol table entries. 865 enum { 866 SYMENTRY_SIZE32 = 16, // 32-bit symbol entry size 867 SYMENTRY_SIZE64 = 24 // 64-bit symbol entry size. 868 }; 869 870 // Symbol bindings. 871 enum { 872 STB_LOCAL = 0, // Local symbol, not visible outside obj file containing def 873 STB_GLOBAL = 1, // Global symbol, visible to all object files being combined 874 STB_WEAK = 2, // Weak symbol, like global but lower-precedence 875 STB_GNU_UNIQUE = 10, 876 STB_LOOS = 10, // Lowest operating system-specific binding type 877 STB_HIOS = 12, // Highest operating system-specific binding type 878 STB_LOPROC = 13, // Lowest processor-specific binding type 879 STB_HIPROC = 15 // Highest processor-specific binding type 880 }; 881 882 // Symbol types. 883 enum { 884 STT_NOTYPE = 0, // Symbol's type is not specified 885 STT_OBJECT = 1, // Symbol is a data object (variable, array, etc.) 886 STT_FUNC = 2, // Symbol is executable code (function, etc.) 887 STT_SECTION = 3, // Symbol refers to a section 888 STT_FILE = 4, // Local, absolute symbol that refers to a file 889 STT_COMMON = 5, // An uninitialized common block 890 STT_TLS = 6, // Thread local data object 891 STT_GNU_IFUNC = 10, // GNU indirect function 892 STT_LOOS = 10, // Lowest operating system-specific symbol type 893 STT_HIOS = 12, // Highest operating system-specific symbol type 894 STT_LOPROC = 13, // Lowest processor-specific symbol type 895 STT_HIPROC = 15, // Highest processor-specific symbol type 896 897 // AMDGPU symbol types 898 STT_AMDGPU_HSA_KERNEL = 10 899 }; 900 901 enum { 902 STV_DEFAULT = 0, // Visibility is specified by binding type 903 STV_INTERNAL = 1, // Defined by processor supplements 904 STV_HIDDEN = 2, // Not visible to other components 905 STV_PROTECTED = 3 // Visible in other components but not preemptable 906 }; 907 908 // Symbol number. 909 enum { STN_UNDEF = 0 }; 910 911 // Special relocation symbols used in the MIPS64 ELF relocation entries 912 enum { 913 RSS_UNDEF = 0, // None 914 RSS_GP = 1, // Value of gp 915 RSS_GP0 = 2, // Value of gp used to create object being relocated 916 RSS_LOC = 3 // Address of location being relocated 917 }; 918 919 // Relocation entry, without explicit addend. 920 struct Elf32_Rel { 921 Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr) 922 Elf32_Word r_info; // Symbol table index and type of relocation to apply 923 924 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE, 925 // and ELF32_R_INFO macros defined in the ELF specification: 926 Elf32_Word getSymbol() const { return (r_info >> 8); } 927 unsigned char getType() const { return (unsigned char)(r_info & 0x0ff); } 928 void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); } 929 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); } 930 void setSymbolAndType(Elf32_Word s, unsigned char t) { 931 r_info = (s << 8) + t; 932 } 933 }; 934 935 // Relocation entry with explicit addend. 936 struct Elf32_Rela { 937 Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr) 938 Elf32_Word r_info; // Symbol table index and type of relocation to apply 939 Elf32_Sword r_addend; // Compute value for relocatable field by adding this 940 941 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE, 942 // and ELF32_R_INFO macros defined in the ELF specification: 943 Elf32_Word getSymbol() const { return (r_info >> 8); } 944 unsigned char getType() const { return (unsigned char)(r_info & 0x0ff); } 945 void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); } 946 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); } 947 void setSymbolAndType(Elf32_Word s, unsigned char t) { 948 r_info = (s << 8) + t; 949 } 950 }; 951 952 // Relocation entry, without explicit addend. 953 struct Elf64_Rel { 954 Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr). 955 Elf64_Xword r_info; // Symbol table index and type of relocation to apply. 956 957 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE, 958 // and ELF64_R_INFO macros defined in the ELF specification: 959 Elf64_Word getSymbol() const { return (r_info >> 32); } 960 Elf64_Word getType() const { return (Elf64_Word)(r_info & 0xffffffffL); } 961 void setSymbol(Elf64_Word s) { setSymbolAndType(s, getType()); } 962 void setType(Elf64_Word t) { setSymbolAndType(getSymbol(), t); } 963 void setSymbolAndType(Elf64_Word s, Elf64_Word t) { 964 r_info = ((Elf64_Xword)s << 32) + (t & 0xffffffffL); 965 } 966 }; 967 968 // Relocation entry with explicit addend. 969 struct Elf64_Rela { 970 Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr). 971 Elf64_Xword r_info; // Symbol table index and type of relocation to apply. 972 Elf64_Sxword r_addend; // Compute value for relocatable field by adding this. 973 974 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE, 975 // and ELF64_R_INFO macros defined in the ELF specification: 976 Elf64_Word getSymbol() const { return (r_info >> 32); } 977 Elf64_Word getType() const { return (Elf64_Word)(r_info & 0xffffffffL); } 978 void setSymbol(Elf64_Word s) { setSymbolAndType(s, getType()); } 979 void setType(Elf64_Word t) { setSymbolAndType(getSymbol(), t); } 980 void setSymbolAndType(Elf64_Word s, Elf64_Word t) { 981 r_info = ((Elf64_Xword)s << 32) + (t & 0xffffffffL); 982 } 983 }; 984 985 // Program header for ELF32. 986 struct Elf32_Phdr { 987 Elf32_Word p_type; // Type of segment 988 Elf32_Off p_offset; // File offset where segment is located, in bytes 989 Elf32_Addr p_vaddr; // Virtual address of beginning of segment 990 Elf32_Addr p_paddr; // Physical address of beginning of segment (OS-specific) 991 Elf32_Word p_filesz; // Num. of bytes in file image of segment (may be zero) 992 Elf32_Word p_memsz; // Num. of bytes in mem image of segment (may be zero) 993 Elf32_Word p_flags; // Segment flags 994 Elf32_Word p_align; // Segment alignment constraint 995 }; 996 997 // Program header for ELF64. 998 struct Elf64_Phdr { 999 Elf64_Word p_type; // Type of segment 1000 Elf64_Word p_flags; // Segment flags 1001 Elf64_Off p_offset; // File offset where segment is located, in bytes 1002 Elf64_Addr p_vaddr; // Virtual address of beginning of segment 1003 Elf64_Addr p_paddr; // Physical addr of beginning of segment (OS-specific) 1004 Elf64_Xword p_filesz; // Num. of bytes in file image of segment (may be zero) 1005 Elf64_Xword p_memsz; // Num. of bytes in mem image of segment (may be zero) 1006 Elf64_Xword p_align; // Segment alignment constraint 1007 }; 1008 1009 // Segment types. 1010 enum { 1011 PT_NULL = 0, // Unused segment. 1012 PT_LOAD = 1, // Loadable segment. 1013 PT_DYNAMIC = 2, // Dynamic linking information. 1014 PT_INTERP = 3, // Interpreter pathname. 1015 PT_NOTE = 4, // Auxiliary information. 1016 PT_SHLIB = 5, // Reserved. 1017 PT_PHDR = 6, // The program header table itself. 1018 PT_TLS = 7, // The thread-local storage template. 1019 PT_LOOS = 0x60000000, // Lowest operating system-specific pt entry type. 1020 PT_HIOS = 0x6fffffff, // Highest operating system-specific pt entry type. 1021 PT_LOPROC = 0x70000000, // Lowest processor-specific program hdr entry type. 1022 PT_HIPROC = 0x7fffffff, // Highest processor-specific program hdr entry type. 1023 1024 // x86-64 program header types. 1025 // These all contain stack unwind tables. 1026 PT_GNU_EH_FRAME = 0x6474e550, 1027 PT_SUNW_EH_FRAME = 0x6474e550, 1028 PT_SUNW_UNWIND = 0x6464e550, 1029 1030 PT_GNU_STACK = 0x6474e551, // Indicates stack executability. 1031 PT_GNU_RELRO = 0x6474e552, // Read-only after relocation. 1032 1033 PT_OPENBSD_RANDOMIZE = 0x65a3dbe6, // Fill with random data. 1034 PT_OPENBSD_WXNEEDED = 0x65a3dbe7, // Program does W^X violations. 1035 PT_OPENBSD_BOOTDATA = 0x65a41be6, // Section for boot arguments. 1036 1037 // ARM program header types. 1038 PT_ARM_ARCHEXT = 0x70000000, // Platform architecture compatibility info 1039 // These all contain stack unwind tables. 1040 PT_ARM_EXIDX = 0x70000001, 1041 PT_ARM_UNWIND = 0x70000001, 1042 1043 // MIPS program header types. 1044 PT_MIPS_REGINFO = 0x70000000, // Register usage information. 1045 PT_MIPS_RTPROC = 0x70000001, // Runtime procedure table. 1046 PT_MIPS_OPTIONS = 0x70000002, // Options segment. 1047 PT_MIPS_ABIFLAGS = 0x70000003, // Abiflags segment. 1048 1049 // WebAssembly program header types. 1050 PT_WEBASSEMBLY_FUNCTIONS = PT_LOPROC + 0, // Function definitions. 1051 }; 1052 1053 // Segment flag bits. 1054 enum : unsigned { 1055 PF_X = 1, // Execute 1056 PF_W = 2, // Write 1057 PF_R = 4, // Read 1058 PF_MASKOS = 0x0ff00000, // Bits for operating system-specific semantics. 1059 PF_MASKPROC = 0xf0000000 // Bits for processor-specific semantics. 1060 }; 1061 1062 // Dynamic table entry for ELF32. 1063 struct Elf32_Dyn { 1064 Elf32_Sword d_tag; // Type of dynamic table entry. 1065 union { 1066 Elf32_Word d_val; // Integer value of entry. 1067 Elf32_Addr d_ptr; // Pointer value of entry. 1068 } d_un; 1069 }; 1070 1071 // Dynamic table entry for ELF64. 1072 struct Elf64_Dyn { 1073 Elf64_Sxword d_tag; // Type of dynamic table entry. 1074 union { 1075 Elf64_Xword d_val; // Integer value of entry. 1076 Elf64_Addr d_ptr; // Pointer value of entry. 1077 } d_un; 1078 }; 1079 1080 // Dynamic table entry tags. 1081 enum { 1082 DT_NULL = 0, // Marks end of dynamic array. 1083 DT_NEEDED = 1, // String table offset of needed library. 1084 DT_PLTRELSZ = 2, // Size of relocation entries in PLT. 1085 DT_PLTGOT = 3, // Address associated with linkage table. 1086 DT_HASH = 4, // Address of symbolic hash table. 1087 DT_STRTAB = 5, // Address of dynamic string table. 1088 DT_SYMTAB = 6, // Address of dynamic symbol table. 1089 DT_RELA = 7, // Address of relocation table (Rela entries). 1090 DT_RELASZ = 8, // Size of Rela relocation table. 1091 DT_RELAENT = 9, // Size of a Rela relocation entry. 1092 DT_STRSZ = 10, // Total size of the string table. 1093 DT_SYMENT = 11, // Size of a symbol table entry. 1094 DT_INIT = 12, // Address of initialization function. 1095 DT_FINI = 13, // Address of termination function. 1096 DT_SONAME = 14, // String table offset of a shared objects name. 1097 DT_RPATH = 15, // String table offset of library search path. 1098 DT_SYMBOLIC = 16, // Changes symbol resolution algorithm. 1099 DT_REL = 17, // Address of relocation table (Rel entries). 1100 DT_RELSZ = 18, // Size of Rel relocation table. 1101 DT_RELENT = 19, // Size of a Rel relocation entry. 1102 DT_PLTREL = 20, // Type of relocation entry used for linking. 1103 DT_DEBUG = 21, // Reserved for debugger. 1104 DT_TEXTREL = 22, // Relocations exist for non-writable segments. 1105 DT_JMPREL = 23, // Address of relocations associated with PLT. 1106 DT_BIND_NOW = 24, // Process all relocations before execution. 1107 DT_INIT_ARRAY = 25, // Pointer to array of initialization functions. 1108 DT_FINI_ARRAY = 26, // Pointer to array of termination functions. 1109 DT_INIT_ARRAYSZ = 27, // Size of DT_INIT_ARRAY. 1110 DT_FINI_ARRAYSZ = 28, // Size of DT_FINI_ARRAY. 1111 DT_RUNPATH = 29, // String table offset of lib search path. 1112 DT_FLAGS = 30, // Flags. 1113 DT_ENCODING = 32, // Values from here to DT_LOOS follow the rules 1114 // for the interpretation of the d_un union. 1115 1116 DT_PREINIT_ARRAY = 32, // Pointer to array of preinit functions. 1117 DT_PREINIT_ARRAYSZ = 33, // Size of the DT_PREINIT_ARRAY array. 1118 1119 DT_LOOS = 0x60000000, // Start of environment specific tags. 1120 DT_HIOS = 0x6FFFFFFF, // End of environment specific tags. 1121 DT_LOPROC = 0x70000000, // Start of processor specific tags. 1122 DT_HIPROC = 0x7FFFFFFF, // End of processor specific tags. 1123 1124 DT_GNU_HASH = 0x6FFFFEF5, // Reference to the GNU hash table. 1125 DT_TLSDESC_PLT = 1126 0x6FFFFEF6, // Location of PLT entry for TLS descriptor resolver calls. 1127 DT_TLSDESC_GOT = 0x6FFFFEF7, // Location of GOT entry used by TLS descriptor 1128 // resolver PLT entry. 1129 DT_RELACOUNT = 0x6FFFFFF9, // ELF32_Rela count. 1130 DT_RELCOUNT = 0x6FFFFFFA, // ELF32_Rel count. 1131 1132 DT_FLAGS_1 = 0X6FFFFFFB, // Flags_1. 1133 DT_VERSYM = 0x6FFFFFF0, // The address of .gnu.version section. 1134 DT_VERDEF = 0X6FFFFFFC, // The address of the version definition table. 1135 DT_VERDEFNUM = 0X6FFFFFFD, // The number of entries in DT_VERDEF. 1136 DT_VERNEED = 0X6FFFFFFE, // The address of the version Dependency table. 1137 DT_VERNEEDNUM = 0X6FFFFFFF, // The number of entries in DT_VERNEED. 1138 1139 // Hexagon specific dynamic table entries 1140 DT_HEXAGON_SYMSZ = 0x70000000, 1141 DT_HEXAGON_VER = 0x70000001, 1142 DT_HEXAGON_PLT = 0x70000002, 1143 1144 // Mips specific dynamic table entry tags. 1145 DT_MIPS_RLD_VERSION = 0x70000001, // 32 bit version number for runtime 1146 // linker interface. 1147 DT_MIPS_TIME_STAMP = 0x70000002, // Time stamp. 1148 DT_MIPS_ICHECKSUM = 0x70000003, // Checksum of external strings 1149 // and common sizes. 1150 DT_MIPS_IVERSION = 0x70000004, // Index of version string 1151 // in string table. 1152 DT_MIPS_FLAGS = 0x70000005, // 32 bits of flags. 1153 DT_MIPS_BASE_ADDRESS = 0x70000006, // Base address of the segment. 1154 DT_MIPS_MSYM = 0x70000007, // Address of .msym section. 1155 DT_MIPS_CONFLICT = 0x70000008, // Address of .conflict section. 1156 DT_MIPS_LIBLIST = 0x70000009, // Address of .liblist section. 1157 DT_MIPS_LOCAL_GOTNO = 0x7000000a, // Number of local global offset 1158 // table entries. 1159 DT_MIPS_CONFLICTNO = 0x7000000b, // Number of entries 1160 // in the .conflict section. 1161 DT_MIPS_LIBLISTNO = 0x70000010, // Number of entries 1162 // in the .liblist section. 1163 DT_MIPS_SYMTABNO = 0x70000011, // Number of entries 1164 // in the .dynsym section. 1165 DT_MIPS_UNREFEXTNO = 0x70000012, // Index of first external dynamic symbol 1166 // not referenced locally. 1167 DT_MIPS_GOTSYM = 0x70000013, // Index of first dynamic symbol 1168 // in global offset table. 1169 DT_MIPS_HIPAGENO = 0x70000014, // Number of page table entries 1170 // in global offset table. 1171 DT_MIPS_RLD_MAP = 0x70000016, // Address of run time loader map, 1172 // used for debugging. 1173 DT_MIPS_DELTA_CLASS = 0x70000017, // Delta C++ class definition. 1174 DT_MIPS_DELTA_CLASS_NO = 0x70000018, // Number of entries 1175 // in DT_MIPS_DELTA_CLASS. 1176 DT_MIPS_DELTA_INSTANCE = 0x70000019, // Delta C++ class instances. 1177 DT_MIPS_DELTA_INSTANCE_NO = 0x7000001A, // Number of entries 1178 // in DT_MIPS_DELTA_INSTANCE. 1179 DT_MIPS_DELTA_RELOC = 0x7000001B, // Delta relocations. 1180 DT_MIPS_DELTA_RELOC_NO = 0x7000001C, // Number of entries 1181 // in DT_MIPS_DELTA_RELOC. 1182 DT_MIPS_DELTA_SYM = 0x7000001D, // Delta symbols that Delta 1183 // relocations refer to. 1184 DT_MIPS_DELTA_SYM_NO = 0x7000001E, // Number of entries 1185 // in DT_MIPS_DELTA_SYM. 1186 DT_MIPS_DELTA_CLASSSYM = 0x70000020, // Delta symbols that hold 1187 // class declarations. 1188 DT_MIPS_DELTA_CLASSSYM_NO = 0x70000021, // Number of entries 1189 // in DT_MIPS_DELTA_CLASSSYM. 1190 DT_MIPS_CXX_FLAGS = 0x70000022, // Flags indicating information 1191 // about C++ flavor. 1192 DT_MIPS_PIXIE_INIT = 0x70000023, // Pixie information. 1193 DT_MIPS_SYMBOL_LIB = 0x70000024, // Address of .MIPS.symlib 1194 DT_MIPS_LOCALPAGE_GOTIDX = 0x70000025, // The GOT index of the first PTE 1195 // for a segment 1196 DT_MIPS_LOCAL_GOTIDX = 0x70000026, // The GOT index of the first PTE 1197 // for a local symbol 1198 DT_MIPS_HIDDEN_GOTIDX = 0x70000027, // The GOT index of the first PTE 1199 // for a hidden symbol 1200 DT_MIPS_PROTECTED_GOTIDX = 0x70000028, // The GOT index of the first PTE 1201 // for a protected symbol 1202 DT_MIPS_OPTIONS = 0x70000029, // Address of `.MIPS.options'. 1203 DT_MIPS_INTERFACE = 0x7000002A, // Address of `.interface'. 1204 DT_MIPS_DYNSTR_ALIGN = 0x7000002B, // Unknown. 1205 DT_MIPS_INTERFACE_SIZE = 0x7000002C, // Size of the .interface section. 1206 DT_MIPS_RLD_TEXT_RESOLVE_ADDR = 0x7000002D, // Size of rld_text_resolve 1207 // function stored in the GOT. 1208 DT_MIPS_PERF_SUFFIX = 0x7000002E, // Default suffix of DSO to be added 1209 // by rld on dlopen() calls. 1210 DT_MIPS_COMPACT_SIZE = 0x7000002F, // Size of compact relocation 1211 // section (O32). 1212 DT_MIPS_GP_VALUE = 0x70000030, // GP value for auxiliary GOTs. 1213 DT_MIPS_AUX_DYNAMIC = 0x70000031, // Address of auxiliary .dynamic. 1214 DT_MIPS_PLTGOT = 0x70000032, // Address of the base of the PLTGOT. 1215 DT_MIPS_RWPLT = 0x70000034, // Points to the base 1216 // of a writable PLT. 1217 DT_MIPS_RLD_MAP_REL = 0x70000035, // Relative offset of run time loader 1218 // map, used for debugging. 1219 1220 // Sun machine-independent extensions. 1221 DT_AUXILIARY = 0x7FFFFFFD, // Shared object to load before self 1222 DT_FILTER = 0x7FFFFFFF // Shared object to get values from 1223 }; 1224 1225 // DT_FLAGS values. 1226 enum { 1227 DF_ORIGIN = 0x01, // The object may reference $ORIGIN. 1228 DF_SYMBOLIC = 0x02, // Search the shared lib before searching the exe. 1229 DF_TEXTREL = 0x04, // Relocations may modify a non-writable segment. 1230 DF_BIND_NOW = 0x08, // Process all relocations on load. 1231 DF_STATIC_TLS = 0x10 // Reject attempts to load dynamically. 1232 }; 1233 1234 // State flags selectable in the `d_un.d_val' element of the DT_FLAGS_1 entry. 1235 enum { 1236 DF_1_NOW = 0x00000001, // Set RTLD_NOW for this object. 1237 DF_1_GLOBAL = 0x00000002, // Set RTLD_GLOBAL for this object. 1238 DF_1_GROUP = 0x00000004, // Set RTLD_GROUP for this object. 1239 DF_1_NODELETE = 0x00000008, // Set RTLD_NODELETE for this object. 1240 DF_1_LOADFLTR = 0x00000010, // Trigger filtee loading at runtime. 1241 DF_1_INITFIRST = 0x00000020, // Set RTLD_INITFIRST for this object. 1242 DF_1_NOOPEN = 0x00000040, // Set RTLD_NOOPEN for this object. 1243 DF_1_ORIGIN = 0x00000080, // $ORIGIN must be handled. 1244 DF_1_DIRECT = 0x00000100, // Direct binding enabled. 1245 DF_1_TRANS = 0x00000200, 1246 DF_1_INTERPOSE = 0x00000400, // Object is used to interpose. 1247 DF_1_NODEFLIB = 0x00000800, // Ignore default lib search path. 1248 DF_1_NODUMP = 0x00001000, // Object can't be dldump'ed. 1249 DF_1_CONFALT = 0x00002000, // Configuration alternative created. 1250 DF_1_ENDFILTEE = 0x00004000, // Filtee terminates filters search. 1251 DF_1_DISPRELDNE = 0x00008000, // Disp reloc applied at build time. 1252 DF_1_DISPRELPND = 0x00010000, // Disp reloc applied at run-time. 1253 DF_1_NODIRECT = 0x00020000, // Object has no-direct binding. 1254 DF_1_IGNMULDEF = 0x00040000, 1255 DF_1_NOKSYMS = 0x00080000, 1256 DF_1_NOHDR = 0x00100000, 1257 DF_1_EDITED = 0x00200000, // Object is modified after built. 1258 DF_1_NORELOC = 0x00400000, 1259 DF_1_SYMINTPOSE = 0x00800000, // Object has individual interposers. 1260 DF_1_GLOBAUDIT = 0x01000000, // Global auditing required. 1261 DF_1_SINGLETON = 0x02000000 // Singleton symbols are used. 1262 }; 1263 1264 // DT_MIPS_FLAGS values. 1265 enum { 1266 RHF_NONE = 0x00000000, // No flags. 1267 RHF_QUICKSTART = 0x00000001, // Uses shortcut pointers. 1268 RHF_NOTPOT = 0x00000002, // Hash size is not a power of two. 1269 RHS_NO_LIBRARY_REPLACEMENT = 0x00000004, // Ignore LD_LIBRARY_PATH. 1270 RHF_NO_MOVE = 0x00000008, // DSO address may not be relocated. 1271 RHF_SGI_ONLY = 0x00000010, // SGI specific features. 1272 RHF_GUARANTEE_INIT = 0x00000020, // Guarantee that .init will finish 1273 // executing before any non-init 1274 // code in DSO is called. 1275 RHF_DELTA_C_PLUS_PLUS = 0x00000040, // Contains Delta C++ code. 1276 RHF_GUARANTEE_START_INIT = 0x00000080, // Guarantee that .init will start 1277 // executing before any non-init 1278 // code in DSO is called. 1279 RHF_PIXIE = 0x00000100, // Generated by pixie. 1280 RHF_DEFAULT_DELAY_LOAD = 0x00000200, // Delay-load DSO by default. 1281 RHF_REQUICKSTART = 0x00000400, // Object may be requickstarted 1282 RHF_REQUICKSTARTED = 0x00000800, // Object has been requickstarted 1283 RHF_CORD = 0x00001000, // Generated by cord. 1284 RHF_NO_UNRES_UNDEF = 0x00002000, // Object contains no unresolved 1285 // undef symbols. 1286 RHF_RLD_ORDER_SAFE = 0x00004000 // Symbol table is in a safe order. 1287 }; 1288 1289 // ElfXX_VerDef structure version (GNU versioning) 1290 enum { VER_DEF_NONE = 0, VER_DEF_CURRENT = 1 }; 1291 1292 // VerDef Flags (ElfXX_VerDef::vd_flags) 1293 enum { VER_FLG_BASE = 0x1, VER_FLG_WEAK = 0x2, VER_FLG_INFO = 0x4 }; 1294 1295 // Special constants for the version table. (SHT_GNU_versym/.gnu.version) 1296 enum { 1297 VER_NDX_LOCAL = 0, // Unversioned local symbol 1298 VER_NDX_GLOBAL = 1, // Unversioned global symbol 1299 VERSYM_VERSION = 0x7fff, // Version Index mask 1300 VERSYM_HIDDEN = 0x8000 // Hidden bit (non-default version) 1301 }; 1302 1303 // ElfXX_VerNeed structure version (GNU versioning) 1304 enum { VER_NEED_NONE = 0, VER_NEED_CURRENT = 1 }; 1305 1306 // SHT_NOTE section types 1307 enum { 1308 NT_FREEBSD_THRMISC = 7, 1309 NT_FREEBSD_PROCSTAT_PROC = 8, 1310 NT_FREEBSD_PROCSTAT_FILES = 9, 1311 NT_FREEBSD_PROCSTAT_VMMAP = 10, 1312 NT_FREEBSD_PROCSTAT_GROUPS = 11, 1313 NT_FREEBSD_PROCSTAT_UMASK = 12, 1314 NT_FREEBSD_PROCSTAT_RLIMIT = 13, 1315 NT_FREEBSD_PROCSTAT_OSREL = 14, 1316 NT_FREEBSD_PROCSTAT_PSSTRINGS = 15, 1317 NT_FREEBSD_PROCSTAT_AUXV = 16, 1318 }; 1319 1320 enum { 1321 NT_GNU_ABI_TAG = 1, 1322 NT_GNU_HWCAP = 2, 1323 NT_GNU_BUILD_ID = 3, 1324 NT_GNU_GOLD_VERSION = 4, 1325 }; 1326 1327 enum { 1328 GNU_ABI_TAG_LINUX = 0, 1329 GNU_ABI_TAG_HURD = 1, 1330 GNU_ABI_TAG_SOLARIS = 2, 1331 GNU_ABI_TAG_FREEBSD = 3, 1332 GNU_ABI_TAG_NETBSD = 4, 1333 GNU_ABI_TAG_SYLLABLE = 5, 1334 GNU_ABI_TAG_NACL = 6, 1335 }; 1336 1337 // Compressed section header for ELF32. 1338 struct Elf32_Chdr { 1339 Elf32_Word ch_type; 1340 Elf32_Word ch_size; 1341 Elf32_Word ch_addralign; 1342 }; 1343 1344 // Compressed section header for ELF64. 1345 struct Elf64_Chdr { 1346 Elf64_Word ch_type; 1347 Elf64_Word ch_reserved; 1348 Elf64_Xword ch_size; 1349 Elf64_Xword ch_addralign; 1350 }; 1351 1352 // Legal values for ch_type field of compressed section header. 1353 enum { 1354 ELFCOMPRESS_ZLIB = 1, // ZLIB/DEFLATE algorithm. 1355 ELFCOMPRESS_LOOS = 0x60000000, // Start of OS-specific. 1356 ELFCOMPRESS_HIOS = 0x6fffffff, // End of OS-specific. 1357 ELFCOMPRESS_LOPROC = 0x70000000, // Start of processor-specific. 1358 ELFCOMPRESS_HIPROC = 0x7fffffff // End of processor-specific. 1359 }; 1360 1361 } // end namespace ELF 1362 } // end namespace llvm 1363 1364 #endif // LLVM_BINARYFORMAT_ELF_H 1365
