1 //===-- llvm/Support/ELF.h - ELF constants and data 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_SUPPORT_ELF_H 21 #define LLVM_SUPPORT_ELF_H 22 23 #include "llvm/Support/Compiler.h" 24 #include "llvm/Support/DataTypes.h" 25 #include <cstring> 26 27 namespace llvm { 28 29 namespace ELF { 30 31 typedef uint32_t Elf32_Addr; // Program address 32 typedef uint32_t Elf32_Off; // File offset 33 typedef uint16_t Elf32_Half; 34 typedef uint32_t Elf32_Word; 35 typedef int32_t Elf32_Sword; 36 37 typedef uint64_t Elf64_Addr; 38 typedef uint64_t Elf64_Off; 39 typedef uint16_t Elf64_Half; 40 typedef uint32_t Elf64_Word; 41 typedef int32_t Elf64_Sword; 42 typedef uint64_t Elf64_Xword; 43 typedef int64_t Elf64_Sxword; 44 45 // Object file magic string. 46 static const char ElfMagic[] = { 0x7f, 'E', 'L', 'F', '\0' }; 47 48 // e_ident size and indices. 49 enum { 50 EI_MAG0 = 0, // File identification index. 51 EI_MAG1 = 1, // File identification index. 52 EI_MAG2 = 2, // File identification index. 53 EI_MAG3 = 3, // File identification index. 54 EI_CLASS = 4, // File class. 55 EI_DATA = 5, // Data encoding. 56 EI_VERSION = 6, // File version. 57 EI_OSABI = 7, // OS/ABI identification. 58 EI_ABIVERSION = 8, // ABI version. 59 EI_PAD = 9, // Start of padding bytes. 60 EI_NIDENT = 16 // Number of bytes in e_ident. 61 }; 62 63 struct Elf32_Ehdr { 64 unsigned char e_ident[EI_NIDENT]; // ELF Identification bytes 65 Elf32_Half e_type; // Type of file (see ET_* below) 66 Elf32_Half e_machine; // Required architecture for this file (see EM_*) 67 Elf32_Word e_version; // Must be equal to 1 68 Elf32_Addr e_entry; // Address to jump to in order to start program 69 Elf32_Off e_phoff; // Program header table's file offset, in bytes 70 Elf32_Off e_shoff; // Section header table's file offset, in bytes 71 Elf32_Word e_flags; // Processor-specific flags 72 Elf32_Half e_ehsize; // Size of ELF header, in bytes 73 Elf32_Half e_phentsize; // Size of an entry in the program header table 74 Elf32_Half e_phnum; // Number of entries in the program header table 75 Elf32_Half e_shentsize; // Size of an entry in the section header table 76 Elf32_Half e_shnum; // Number of entries in the section header table 77 Elf32_Half e_shstrndx; // Sect hdr table index of sect name string table 78 bool checkMagic() const { 79 return (memcmp(e_ident, ElfMagic, strlen(ElfMagic))) == 0; 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 bool checkMagic() const { 103 return (memcmp(e_ident, ElfMagic, strlen(ElfMagic))) == 0; 104 } 105 unsigned char getFileClass() const { return e_ident[EI_CLASS]; } 106 unsigned char getDataEncoding() const { return e_ident[EI_DATA]; } 107 }; 108 109 // File types 110 enum { 111 ET_NONE = 0, // No file type 112 ET_REL = 1, // Relocatable file 113 ET_EXEC = 2, // Executable file 114 ET_DYN = 3, // Shared object file 115 ET_CORE = 4, // Core file 116 ET_LOPROC = 0xff00, // Beginning of processor-specific codes 117 ET_HIPROC = 0xffff // Processor-specific 118 }; 119 120 // Versioning 121 enum { 122 EV_NONE = 0, 123 EV_CURRENT = 1 124 }; 125 126 // Machine architectures 127 // See current registered ELF machine architectures at: 128 // http://www.uxsglobal.com/developers/gabi/latest/ch4.eheader.html 129 enum { 130 EM_NONE = 0, // No machine 131 EM_M32 = 1, // AT&T WE 32100 132 EM_SPARC = 2, // SPARC 133 EM_386 = 3, // Intel 386 134 EM_68K = 4, // Motorola 68000 135 EM_88K = 5, // Motorola 88000 136 EM_IAMCU = 6, // Intel MCU 137 EM_860 = 7, // Intel 80860 138 EM_MIPS = 8, // MIPS R3000 139 EM_S370 = 9, // IBM System/370 140 EM_MIPS_RS3_LE = 10, // MIPS RS3000 Little-endian 141 EM_PARISC = 15, // Hewlett-Packard PA-RISC 142 EM_VPP500 = 17, // Fujitsu VPP500 143 EM_SPARC32PLUS = 18, // Enhanced instruction set SPARC 144 EM_960 = 19, // Intel 80960 145 EM_PPC = 20, // PowerPC 146 EM_PPC64 = 21, // PowerPC64 147 EM_S390 = 22, // IBM System/390 148 EM_SPU = 23, // IBM SPU/SPC 149 EM_V800 = 36, // NEC V800 150 EM_FR20 = 37, // Fujitsu FR20 151 EM_RH32 = 38, // TRW RH-32 152 EM_RCE = 39, // Motorola RCE 153 EM_ARM = 40, // ARM 154 EM_ALPHA = 41, // DEC Alpha 155 EM_SH = 42, // Hitachi SH 156 EM_SPARCV9 = 43, // SPARC V9 157 EM_TRICORE = 44, // Siemens TriCore 158 EM_ARC = 45, // Argonaut RISC Core 159 EM_H8_300 = 46, // Hitachi H8/300 160 EM_H8_300H = 47, // Hitachi H8/300H 161 EM_H8S = 48, // Hitachi H8S 162 EM_H8_500 = 49, // Hitachi H8/500 163 EM_IA_64 = 50, // Intel IA-64 processor architecture 164 EM_MIPS_X = 51, // Stanford MIPS-X 165 EM_COLDFIRE = 52, // Motorola ColdFire 166 EM_68HC12 = 53, // Motorola M68HC12 167 EM_MMA = 54, // Fujitsu MMA Multimedia Accelerator 168 EM_PCP = 55, // Siemens PCP 169 EM_NCPU = 56, // Sony nCPU embedded RISC processor 170 EM_NDR1 = 57, // Denso NDR1 microprocessor 171 EM_STARCORE = 58, // Motorola Star*Core processor 172 EM_ME16 = 59, // Toyota ME16 processor 173 EM_ST100 = 60, // STMicroelectronics ST100 processor 174 EM_TINYJ = 61, // Advanced Logic Corp. TinyJ embedded processor family 175 EM_X86_64 = 62, // AMD x86-64 architecture 176 EM_PDSP = 63, // Sony DSP Processor 177 EM_PDP10 = 64, // Digital Equipment Corp. PDP-10 178 EM_PDP11 = 65, // Digital Equipment Corp. PDP-11 179 EM_FX66 = 66, // Siemens FX66 microcontroller 180 EM_ST9PLUS = 67, // STMicroelectronics ST9+ 8/16 bit microcontroller 181 EM_ST7 = 68, // STMicroelectronics ST7 8-bit microcontroller 182 EM_68HC16 = 69, // Motorola MC68HC16 Microcontroller 183 EM_68HC11 = 70, // Motorola MC68HC11 Microcontroller 184 EM_68HC08 = 71, // Motorola MC68HC08 Microcontroller 185 EM_68HC05 = 72, // Motorola MC68HC05 Microcontroller 186 EM_SVX = 73, // Silicon Graphics SVx 187 EM_ST19 = 74, // STMicroelectronics ST19 8-bit microcontroller 188 EM_VAX = 75, // Digital VAX 189 EM_CRIS = 76, // Axis Communications 32-bit embedded processor 190 EM_JAVELIN = 77, // Infineon Technologies 32-bit embedded processor 191 EM_FIREPATH = 78, // Element 14 64-bit DSP Processor 192 EM_ZSP = 79, // LSI Logic 16-bit DSP Processor 193 EM_MMIX = 80, // Donald Knuth's educational 64-bit processor 194 EM_HUANY = 81, // Harvard University machine-independent object files 195 EM_PRISM = 82, // SiTera Prism 196 EM_AVR = 83, // Atmel AVR 8-bit microcontroller 197 EM_FR30 = 84, // Fujitsu FR30 198 EM_D10V = 85, // Mitsubishi D10V 199 EM_D30V = 86, // Mitsubishi D30V 200 EM_V850 = 87, // NEC v850 201 EM_M32R = 88, // Mitsubishi M32R 202 EM_MN10300 = 89, // Matsushita MN10300 203 EM_MN10200 = 90, // Matsushita MN10200 204 EM_PJ = 91, // picoJava 205 EM_OPENRISC = 92, // OpenRISC 32-bit embedded processor 206 EM_ARC_COMPACT = 93, // ARC International ARCompact processor (old 207 // spelling/synonym: EM_ARC_A5) 208 EM_XTENSA = 94, // Tensilica Xtensa Architecture 209 EM_VIDEOCORE = 95, // Alphamosaic VideoCore processor 210 EM_TMM_GPP = 96, // Thompson Multimedia General Purpose Processor 211 EM_NS32K = 97, // National Semiconductor 32000 series 212 EM_TPC = 98, // Tenor Network TPC processor 213 EM_SNP1K = 99, // Trebia SNP 1000 processor 214 EM_ST200 = 100, // STMicroelectronics (www.st.com) ST200 215 EM_IP2K = 101, // Ubicom IP2xxx microcontroller family 216 EM_MAX = 102, // MAX Processor 217 EM_CR = 103, // National Semiconductor CompactRISC microprocessor 218 EM_F2MC16 = 104, // Fujitsu F2MC16 219 EM_MSP430 = 105, // Texas Instruments embedded microcontroller msp430 220 EM_BLACKFIN = 106, // Analog Devices Blackfin (DSP) processor 221 EM_SE_C33 = 107, // S1C33 Family of Seiko Epson processors 222 EM_SEP = 108, // Sharp embedded microprocessor 223 EM_ARCA = 109, // Arca RISC Microprocessor 224 EM_UNICORE = 110, // Microprocessor series from PKU-Unity Ltd. and MPRC 225 // of Peking University 226 EM_EXCESS = 111, // eXcess: 16/32/64-bit configurable embedded CPU 227 EM_DXP = 112, // Icera Semiconductor Inc. Deep Execution Processor 228 EM_ALTERA_NIOS2 = 113, // Altera Nios II soft-core processor 229 EM_CRX = 114, // National Semiconductor CompactRISC CRX 230 EM_XGATE = 115, // Motorola XGATE embedded processor 231 EM_C166 = 116, // Infineon C16x/XC16x processor 232 EM_M16C = 117, // Renesas M16C series microprocessors 233 EM_DSPIC30F = 118, // Microchip Technology dsPIC30F Digital Signal 234 // Controller 235 EM_CE = 119, // Freescale Communication Engine RISC core 236 EM_M32C = 120, // Renesas M32C series microprocessors 237 EM_TSK3000 = 131, // Altium TSK3000 core 238 EM_RS08 = 132, // Freescale RS08 embedded processor 239 EM_SHARC = 133, // Analog Devices SHARC family of 32-bit DSP 240 // processors 241 EM_ECOG2 = 134, // Cyan Technology eCOG2 microprocessor 242 EM_SCORE7 = 135, // Sunplus S+core7 RISC processor 243 EM_DSP24 = 136, // New Japan Radio (NJR) 24-bit DSP Processor 244 EM_VIDEOCORE3 = 137, // Broadcom VideoCore III processor 245 EM_LATTICEMICO32 = 138, // RISC processor for Lattice FPGA architecture 246 EM_SE_C17 = 139, // Seiko Epson C17 family 247 EM_TI_C6000 = 140, // The Texas Instruments TMS320C6000 DSP family 248 EM_TI_C2000 = 141, // The Texas Instruments TMS320C2000 DSP family 249 EM_TI_C5500 = 142, // The Texas Instruments TMS320C55x DSP family 250 EM_MMDSP_PLUS = 160, // STMicroelectronics 64bit VLIW Data Signal Processor 251 EM_CYPRESS_M8C = 161, // Cypress M8C microprocessor 252 EM_R32C = 162, // Renesas R32C series microprocessors 253 EM_TRIMEDIA = 163, // NXP Semiconductors TriMedia architecture family 254 EM_HEXAGON = 164, // Qualcomm Hexagon processor 255 EM_8051 = 165, // Intel 8051 and variants 256 EM_STXP7X = 166, // STMicroelectronics STxP7x family of configurable 257 // and extensible RISC processors 258 EM_NDS32 = 167, // Andes Technology compact code size embedded RISC 259 // processor family 260 EM_ECOG1 = 168, // Cyan Technology eCOG1X family 261 EM_ECOG1X = 168, // Cyan Technology eCOG1X family 262 EM_MAXQ30 = 169, // Dallas Semiconductor MAXQ30 Core Micro-controllers 263 EM_XIMO16 = 170, // New Japan Radio (NJR) 16-bit DSP Processor 264 EM_MANIK = 171, // M2000 Reconfigurable RISC Microprocessor 265 EM_CRAYNV2 = 172, // Cray Inc. NV2 vector architecture 266 EM_RX = 173, // Renesas RX family 267 EM_METAG = 174, // Imagination Technologies META processor 268 // architecture 269 EM_MCST_ELBRUS = 175, // MCST Elbrus general purpose hardware architecture 270 EM_ECOG16 = 176, // Cyan Technology eCOG16 family 271 EM_CR16 = 177, // National Semiconductor CompactRISC CR16 16-bit 272 // microprocessor 273 EM_ETPU = 178, // Freescale Extended Time Processing Unit 274 EM_SLE9X = 179, // Infineon Technologies SLE9X core 275 EM_L10M = 180, // Intel L10M 276 EM_K10M = 181, // Intel K10M 277 EM_AARCH64 = 183, // ARM AArch64 278 EM_AVR32 = 185, // Atmel Corporation 32-bit microprocessor family 279 EM_STM8 = 186, // STMicroeletronics STM8 8-bit microcontroller 280 EM_TILE64 = 187, // Tilera TILE64 multicore architecture family 281 EM_TILEPRO = 188, // Tilera TILEPro multicore architecture family 282 EM_CUDA = 190, // NVIDIA CUDA architecture 283 EM_TILEGX = 191, // Tilera TILE-Gx multicore architecture family 284 EM_CLOUDSHIELD = 192, // CloudShield architecture family 285 EM_COREA_1ST = 193, // KIPO-KAIST Core-A 1st generation processor family 286 EM_COREA_2ND = 194, // KIPO-KAIST Core-A 2nd generation processor family 287 EM_ARC_COMPACT2 = 195, // Synopsys ARCompact V2 288 EM_OPEN8 = 196, // Open8 8-bit RISC soft processor core 289 EM_RL78 = 197, // Renesas RL78 family 290 EM_VIDEOCORE5 = 198, // Broadcom VideoCore V processor 291 EM_78KOR = 199, // Renesas 78KOR family 292 EM_56800EX = 200, // Freescale 56800EX Digital Signal Controller (DSC) 293 EM_BA1 = 201, // Beyond BA1 CPU architecture 294 EM_BA2 = 202, // Beyond BA2 CPU architecture 295 EM_XCORE = 203, // XMOS xCORE processor family 296 EM_MCHP_PIC = 204, // Microchip 8-bit PIC(r) family 297 EM_INTEL205 = 205, // Reserved by Intel 298 EM_INTEL206 = 206, // Reserved by Intel 299 EM_INTEL207 = 207, // Reserved by Intel 300 EM_INTEL208 = 208, // Reserved by Intel 301 EM_INTEL209 = 209, // Reserved by Intel 302 EM_KM32 = 210, // KM211 KM32 32-bit processor 303 EM_KMX32 = 211, // KM211 KMX32 32-bit processor 304 EM_KMX16 = 212, // KM211 KMX16 16-bit processor 305 EM_KMX8 = 213, // KM211 KMX8 8-bit processor 306 EM_KVARC = 214, // KM211 KVARC processor 307 EM_CDP = 215, // Paneve CDP architecture family 308 EM_COGE = 216, // Cognitive Smart Memory Processor 309 EM_COOL = 217, // iCelero CoolEngine 310 EM_NORC = 218, // Nanoradio Optimized RISC 311 EM_CSR_KALIMBA = 219, // CSR Kalimba architecture family 312 EM_AMDGPU = 224, // AMD GPU architecture 313 EM_LANAI = 244, // Lanai 32-bit processor 314 315 // A request has been made to the maintainer of the official registry for 316 // such numbers for an official value for WebAssembly. As soon as one is 317 // allocated, this enum will be updated to use it. 318 EM_WEBASSEMBLY = 0x4157, // WebAssembly architecture 319 }; 320 321 // Object file classes. 322 enum { 323 ELFCLASSNONE = 0, 324 ELFCLASS32 = 1, // 32-bit object file 325 ELFCLASS64 = 2 // 64-bit object file 326 }; 327 328 // Object file byte orderings. 329 enum { 330 ELFDATANONE = 0, // Invalid data encoding. 331 ELFDATA2LSB = 1, // Little-endian object file 332 ELFDATA2MSB = 2 // Big-endian object file 333 }; 334 335 // OS ABI identification. 336 enum { 337 ELFOSABI_NONE = 0, // UNIX System V ABI 338 ELFOSABI_HPUX = 1, // HP-UX operating system 339 ELFOSABI_NETBSD = 2, // NetBSD 340 ELFOSABI_GNU = 3, // GNU/Linux 341 ELFOSABI_LINUX = 3, // Historical alias for ELFOSABI_GNU. 342 ELFOSABI_HURD = 4, // GNU/Hurd 343 ELFOSABI_SOLARIS = 6, // Solaris 344 ELFOSABI_AIX = 7, // AIX 345 ELFOSABI_IRIX = 8, // IRIX 346 ELFOSABI_FREEBSD = 9, // FreeBSD 347 ELFOSABI_TRU64 = 10, // TRU64 UNIX 348 ELFOSABI_MODESTO = 11, // Novell Modesto 349 ELFOSABI_OPENBSD = 12, // OpenBSD 350 ELFOSABI_OPENVMS = 13, // OpenVMS 351 ELFOSABI_NSK = 14, // Hewlett-Packard Non-Stop Kernel 352 ELFOSABI_AROS = 15, // AROS 353 ELFOSABI_FENIXOS = 16, // FenixOS 354 ELFOSABI_CLOUDABI = 17, // Nuxi CloudABI 355 ELFOSABI_C6000_ELFABI = 64, // Bare-metal TMS320C6000 356 ELFOSABI_AMDGPU_HSA = 64, // AMD HSA runtime 357 ELFOSABI_C6000_LINUX = 65, // Linux TMS320C6000 358 ELFOSABI_ARM = 97, // ARM 359 ELFOSABI_STANDALONE = 255 // Standalone (embedded) application 360 }; 361 362 #define ELF_RELOC(name, value) name = value, 363 364 // X86_64 relocations. 365 enum { 366 #include "ELFRelocs/x86_64.def" 367 }; 368 369 // i386 relocations. 370 enum { 371 #include "ELFRelocs/i386.def" 372 }; 373 374 // ELF Relocation types for PPC32 375 enum { 376 #include "ELFRelocs/PowerPC.def" 377 }; 378 379 // Specific e_flags for PPC64 380 enum { 381 // e_flags bits specifying ABI: 382 // 1 for original ABI using function descriptors, 383 // 2 for revised ABI without function descriptors, 384 // 0 for unspecified or not using any features affected by the differences. 385 EF_PPC64_ABI = 3 386 }; 387 388 // Special values for the st_other field in the symbol table entry for PPC64. 389 enum { 390 STO_PPC64_LOCAL_BIT = 5, 391 STO_PPC64_LOCAL_MASK = (7 << STO_PPC64_LOCAL_BIT) 392 }; 393 static inline int64_t 394 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 399 encodePPC64LocalEntryOffset(int64_t Offset) { 400 unsigned Val = (Offset >= 4 * 4 401 ? (Offset >= 8 * 4 402 ? (Offset >= 16 * 4 ? 6 : 5) 403 : 4) 404 : (Offset >= 2 * 4 405 ? 3 406 : (Offset >= 1 * 4 ? 2 : 0))); 407 return Val << STO_PPC64_LOCAL_BIT; 408 } 409 410 // ELF Relocation types for PPC64 411 enum { 412 #include "ELFRelocs/PowerPC64.def" 413 }; 414 415 // ELF Relocation types for AArch64 416 enum { 417 #include "ELFRelocs/AArch64.def" 418 }; 419 420 // ARM Specific e_flags 421 enum : unsigned { 422 EF_ARM_SOFT_FLOAT = 0x00000200U, 423 EF_ARM_VFP_FLOAT = 0x00000400U, 424 EF_ARM_EABI_UNKNOWN = 0x00000000U, 425 EF_ARM_EABI_VER1 = 0x01000000U, 426 EF_ARM_EABI_VER2 = 0x02000000U, 427 EF_ARM_EABI_VER3 = 0x03000000U, 428 EF_ARM_EABI_VER4 = 0x04000000U, 429 EF_ARM_EABI_VER5 = 0x05000000U, 430 EF_ARM_EABIMASK = 0xFF000000U 431 }; 432 433 // ELF Relocation types for ARM 434 enum { 435 #include "ELFRelocs/ARM.def" 436 }; 437 438 // AVR specific e_flags 439 enum : unsigned { 440 EF_AVR_ARCH_AVR1 = 1, 441 EF_AVR_ARCH_AVR2 = 2, 442 EF_AVR_ARCH_AVR25 = 25, 443 EF_AVR_ARCH_AVR3 = 3, 444 EF_AVR_ARCH_AVR31 = 31, 445 EF_AVR_ARCH_AVR35 = 35, 446 EF_AVR_ARCH_AVR4 = 4, 447 EF_AVR_ARCH_AVR5 = 5, 448 EF_AVR_ARCH_AVR51 = 51, 449 EF_AVR_ARCH_AVR6 = 6, 450 EF_AVR_ARCH_AVRTINY = 100, 451 EF_AVR_ARCH_XMEGA1 = 101, 452 EF_AVR_ARCH_XMEGA2 = 102, 453 EF_AVR_ARCH_XMEGA3 = 103, 454 EF_AVR_ARCH_XMEGA4 = 104, 455 EF_AVR_ARCH_XMEGA5 = 105, 456 EF_AVR_ARCH_XMEGA6 = 106, 457 EF_AVR_ARCH_XMEGA7 = 107 458 }; 459 460 // ELF Relocation types for AVR 461 enum { 462 #include "ELFRelocs/AVR.def" 463 }; 464 465 // Mips Specific e_flags 466 enum : unsigned { 467 EF_MIPS_NOREORDER = 0x00000001, // Don't reorder instructions 468 EF_MIPS_PIC = 0x00000002, // Position independent code 469 EF_MIPS_CPIC = 0x00000004, // Call object with Position independent code 470 EF_MIPS_ABI2 = 0x00000020, // File uses N32 ABI 471 EF_MIPS_32BITMODE = 0x00000100, // Code compiled for a 64-bit machine 472 // in 32-bit mode 473 EF_MIPS_FP64 = 0x00000200, // Code compiled for a 32-bit machine 474 // but uses 64-bit FP registers 475 EF_MIPS_NAN2008 = 0x00000400, // Uses IEE 754-2008 NaN encoding 476 477 // ABI flags 478 EF_MIPS_ABI_O32 = 0x00001000, // This file follows the first MIPS 32 bit ABI 479 EF_MIPS_ABI_O64 = 0x00002000, // O32 ABI extended for 64-bit architecture. 480 EF_MIPS_ABI_EABI32 = 0x00003000, // EABI in 32 bit mode. 481 EF_MIPS_ABI_EABI64 = 0x00004000, // EABI in 64 bit mode. 482 EF_MIPS_ABI = 0x0000f000, // Mask for selecting EF_MIPS_ABI_ variant. 483 484 // MIPS machine variant 485 EF_MIPS_MACH_NONE = 0x00000000, // A standard MIPS implementation. 486 EF_MIPS_MACH_3900 = 0x00810000, // Toshiba R3900 487 EF_MIPS_MACH_4010 = 0x00820000, // LSI R4010 488 EF_MIPS_MACH_4100 = 0x00830000, // NEC VR4100 489 EF_MIPS_MACH_4650 = 0x00850000, // MIPS R4650 490 EF_MIPS_MACH_4120 = 0x00870000, // NEC VR4120 491 EF_MIPS_MACH_4111 = 0x00880000, // NEC VR4111/VR4181 492 EF_MIPS_MACH_SB1 = 0x008a0000, // Broadcom SB-1 493 EF_MIPS_MACH_OCTEON = 0x008b0000, // Cavium Networks Octeon 494 EF_MIPS_MACH_XLR = 0x008c0000, // RMI Xlr 495 EF_MIPS_MACH_OCTEON2 = 0x008d0000, // Cavium Networks Octeon2 496 EF_MIPS_MACH_OCTEON3 = 0x008e0000, // Cavium Networks Octeon3 497 EF_MIPS_MACH_5400 = 0x00910000, // NEC VR5400 498 EF_MIPS_MACH_5900 = 0x00920000, // MIPS R5900 499 EF_MIPS_MACH_5500 = 0x00980000, // NEC VR5500 500 EF_MIPS_MACH_9000 = 0x00990000, // Unknown 501 EF_MIPS_MACH_LS2E = 0x00a00000, // ST Microelectronics Loongson 2E 502 EF_MIPS_MACH_LS2F = 0x00a10000, // ST Microelectronics Loongson 2F 503 EF_MIPS_MACH_LS3A = 0x00a20000, // Loongson 3A 504 EF_MIPS_MACH = 0x00ff0000, // EF_MIPS_MACH_xxx selection mask 505 506 // ARCH_ASE 507 EF_MIPS_MICROMIPS = 0x02000000, // microMIPS 508 EF_MIPS_ARCH_ASE_M16 = 509 0x04000000, // Has Mips-16 ISA extensions 510 EF_MIPS_ARCH_ASE_MDMX = 511 0x08000000, // Has MDMX multimedia extensions 512 EF_MIPS_ARCH_ASE = 0x0f000000, // Mask for EF_MIPS_ARCH_ASE_xxx flags 513 514 // ARCH 515 EF_MIPS_ARCH_1 = 0x00000000, // MIPS1 instruction set 516 EF_MIPS_ARCH_2 = 0x10000000, // MIPS2 instruction set 517 EF_MIPS_ARCH_3 = 0x20000000, // MIPS3 instruction set 518 EF_MIPS_ARCH_4 = 0x30000000, // MIPS4 instruction set 519 EF_MIPS_ARCH_5 = 0x40000000, // MIPS5 instruction set 520 EF_MIPS_ARCH_32 = 0x50000000, // MIPS32 instruction set per linux not elf.h 521 EF_MIPS_ARCH_64 = 0x60000000, // MIPS64 instruction set per linux not elf.h 522 EF_MIPS_ARCH_32R2 = 0x70000000, // mips32r2, mips32r3, mips32r5 523 EF_MIPS_ARCH_64R2 = 0x80000000, // mips64r2, mips64r3, mips64r5 524 EF_MIPS_ARCH_32R6 = 0x90000000, // mips32r6 525 EF_MIPS_ARCH_64R6 = 0xa0000000, // mips64r6 526 EF_MIPS_ARCH = 0xf0000000 // Mask for applying EF_MIPS_ARCH_ variant 527 }; 528 529 // ELF Relocation types for Mips 530 enum { 531 #include "ELFRelocs/Mips.def" 532 }; 533 534 // Special values for the st_other field in the symbol table entry for MIPS. 535 enum { 536 STO_MIPS_OPTIONAL = 0x04, // Symbol whose definition is optional 537 STO_MIPS_PLT = 0x08, // PLT entry related dynamic table record 538 STO_MIPS_PIC = 0x20, // PIC func in an object mixes PIC/non-PIC 539 STO_MIPS_MICROMIPS = 0x80, // MIPS Specific ISA for MicroMips 540 STO_MIPS_MIPS16 = 0xf0 // MIPS Specific ISA for Mips16 541 }; 542 543 // .MIPS.options section descriptor kinds 544 enum { 545 ODK_NULL = 0, // Undefined 546 ODK_REGINFO = 1, // Register usage information 547 ODK_EXCEPTIONS = 2, // Exception processing options 548 ODK_PAD = 3, // Section padding options 549 ODK_HWPATCH = 4, // Hardware patches applied 550 ODK_FILL = 5, // Linker fill value 551 ODK_TAGS = 6, // Space for tool identification 552 ODK_HWAND = 7, // Hardware AND patches applied 553 ODK_HWOR = 8, // Hardware OR patches applied 554 ODK_GP_GROUP = 9, // GP group to use for text/data sections 555 ODK_IDENT = 10, // ID information 556 ODK_PAGESIZE = 11 // Page size information 557 }; 558 559 // Hexagon-specific e_flags 560 enum { 561 // Object processor version flags, bits[11:0] 562 EF_HEXAGON_MACH_V2 = 0x00000001, // Hexagon V2 563 EF_HEXAGON_MACH_V3 = 0x00000002, // Hexagon V3 564 EF_HEXAGON_MACH_V4 = 0x00000003, // Hexagon V4 565 EF_HEXAGON_MACH_V5 = 0x00000004, // Hexagon V5 566 EF_HEXAGON_MACH_V55 = 0x00000005, // Hexagon V55 567 EF_HEXAGON_MACH_V60 = 0x00000060, // Hexagon V60 568 569 // Highest ISA version flags 570 EF_HEXAGON_ISA_MACH = 0x00000000, // Same as specified in bits[11:0] 571 // of e_flags 572 EF_HEXAGON_ISA_V2 = 0x00000010, // Hexagon V2 ISA 573 EF_HEXAGON_ISA_V3 = 0x00000020, // Hexagon V3 ISA 574 EF_HEXAGON_ISA_V4 = 0x00000030, // Hexagon V4 ISA 575 EF_HEXAGON_ISA_V5 = 0x00000040, // Hexagon V5 ISA 576 EF_HEXAGON_ISA_V55 = 0x00000050, // Hexagon V55 ISA 577 EF_HEXAGON_ISA_V60 = 0x00000060, // Hexagon V60 ISA 578 }; 579 580 // Hexagon-specific section indexes for common small data 581 enum { 582 SHN_HEXAGON_SCOMMON = 0xff00, // Other access sizes 583 SHN_HEXAGON_SCOMMON_1 = 0xff01, // Byte-sized access 584 SHN_HEXAGON_SCOMMON_2 = 0xff02, // Half-word-sized access 585 SHN_HEXAGON_SCOMMON_4 = 0xff03, // Word-sized access 586 SHN_HEXAGON_SCOMMON_8 = 0xff04 // Double-word-size access 587 }; 588 589 // ELF Relocation types for Hexagon 590 enum { 591 #include "ELFRelocs/Hexagon.def" 592 }; 593 594 // ELF Relocation type for Lanai. 595 enum { 596 #include "ELFRelocs/Lanai.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 #undef ELF_RELOC 620 621 // Section header. 622 struct Elf32_Shdr { 623 Elf32_Word sh_name; // Section name (index into string table) 624 Elf32_Word sh_type; // Section type (SHT_*) 625 Elf32_Word sh_flags; // Section flags (SHF_*) 626 Elf32_Addr sh_addr; // Address where section is to be loaded 627 Elf32_Off sh_offset; // File offset of section data, in bytes 628 Elf32_Word sh_size; // Size of section, in bytes 629 Elf32_Word sh_link; // Section type-specific header table index link 630 Elf32_Word sh_info; // Section type-specific extra information 631 Elf32_Word sh_addralign; // Section address alignment 632 Elf32_Word sh_entsize; // Size of records contained within the section 633 }; 634 635 // Section header for ELF64 - same fields as ELF32, different types. 636 struct Elf64_Shdr { 637 Elf64_Word sh_name; 638 Elf64_Word sh_type; 639 Elf64_Xword sh_flags; 640 Elf64_Addr sh_addr; 641 Elf64_Off sh_offset; 642 Elf64_Xword sh_size; 643 Elf64_Word sh_link; 644 Elf64_Word sh_info; 645 Elf64_Xword sh_addralign; 646 Elf64_Xword sh_entsize; 647 }; 648 649 // Special section indices. 650 enum { 651 SHN_UNDEF = 0, // Undefined, missing, irrelevant, or meaningless 652 SHN_LORESERVE = 0xff00, // Lowest reserved index 653 SHN_LOPROC = 0xff00, // Lowest processor-specific index 654 SHN_HIPROC = 0xff1f, // Highest processor-specific index 655 SHN_LOOS = 0xff20, // Lowest operating system-specific index 656 SHN_HIOS = 0xff3f, // Highest operating system-specific index 657 SHN_ABS = 0xfff1, // Symbol has absolute value; does not need relocation 658 SHN_COMMON = 0xfff2, // FORTRAN COMMON or C external global variables 659 SHN_XINDEX = 0xffff, // Mark that the index is >= SHN_LORESERVE 660 SHN_HIRESERVE = 0xffff // Highest reserved index 661 }; 662 663 // Section types. 664 enum : unsigned { 665 SHT_NULL = 0, // No associated section (inactive entry). 666 SHT_PROGBITS = 1, // Program-defined contents. 667 SHT_SYMTAB = 2, // Symbol table. 668 SHT_STRTAB = 3, // String table. 669 SHT_RELA = 4, // Relocation entries; explicit addends. 670 SHT_HASH = 5, // Symbol hash table. 671 SHT_DYNAMIC = 6, // Information for dynamic linking. 672 SHT_NOTE = 7, // Information about the file. 673 SHT_NOBITS = 8, // Data occupies no space in the file. 674 SHT_REL = 9, // Relocation entries; no explicit addends. 675 SHT_SHLIB = 10, // Reserved. 676 SHT_DYNSYM = 11, // Symbol table. 677 SHT_INIT_ARRAY = 14, // Pointers to initialization functions. 678 SHT_FINI_ARRAY = 15, // Pointers to termination functions. 679 SHT_PREINIT_ARRAY = 16, // Pointers to pre-init functions. 680 SHT_GROUP = 17, // Section group. 681 SHT_SYMTAB_SHNDX = 18, // Indices for SHN_XINDEX entries. 682 SHT_LOOS = 0x60000000, // Lowest operating system-specific type. 683 SHT_GNU_ATTRIBUTES= 0x6ffffff5, // Object attributes. 684 SHT_GNU_HASH = 0x6ffffff6, // GNU-style hash table. 685 SHT_GNU_verdef = 0x6ffffffd, // GNU version definitions. 686 SHT_GNU_verneed = 0x6ffffffe, // GNU version references. 687 SHT_GNU_versym = 0x6fffffff, // GNU symbol versions table. 688 SHT_HIOS = 0x6fffffff, // Highest operating system-specific type. 689 SHT_LOPROC = 0x70000000, // Lowest processor arch-specific type. 690 // Fixme: All this is duplicated in MCSectionELF. Why?? 691 // Exception Index table 692 SHT_ARM_EXIDX = 0x70000001U, 693 // BPABI DLL dynamic linking pre-emption map 694 SHT_ARM_PREEMPTMAP = 0x70000002U, 695 // Object file compatibility attributes 696 SHT_ARM_ATTRIBUTES = 0x70000003U, 697 SHT_ARM_DEBUGOVERLAY = 0x70000004U, 698 SHT_ARM_OVERLAYSECTION = 0x70000005U, 699 SHT_HEX_ORDERED = 0x70000000, // Link editor is to sort the entries in 700 // this section based on their sizes 701 SHT_X86_64_UNWIND = 0x70000001, // Unwind information 702 703 SHT_MIPS_REGINFO = 0x70000006, // Register usage information 704 SHT_MIPS_OPTIONS = 0x7000000d, // General options 705 SHT_MIPS_ABIFLAGS = 0x7000002a, // ABI information. 706 707 SHT_HIPROC = 0x7fffffff, // Highest processor arch-specific type. 708 SHT_LOUSER = 0x80000000, // Lowest type reserved for applications. 709 SHT_HIUSER = 0xffffffff // Highest type reserved for applications. 710 }; 711 712 // Section flags. 713 enum : unsigned { 714 // Section data should be writable during execution. 715 SHF_WRITE = 0x1, 716 717 // Section occupies memory during program execution. 718 SHF_ALLOC = 0x2, 719 720 // Section contains executable machine instructions. 721 SHF_EXECINSTR = 0x4, 722 723 // The data in this section may be merged. 724 SHF_MERGE = 0x10, 725 726 // The data in this section is null-terminated strings. 727 SHF_STRINGS = 0x20, 728 729 // A field in this section holds a section header table index. 730 SHF_INFO_LINK = 0x40U, 731 732 // Adds special ordering requirements for link editors. 733 SHF_LINK_ORDER = 0x80U, 734 735 // This section requires special OS-specific processing to avoid incorrect 736 // behavior. 737 SHF_OS_NONCONFORMING = 0x100U, 738 739 // This section is a member of a section group. 740 SHF_GROUP = 0x200U, 741 742 // This section holds Thread-Local Storage. 743 SHF_TLS = 0x400U, 744 745 // Identifies a section containing compressed data. 746 SHF_COMPRESSED = 0x800U, 747 748 // This section is excluded from the final executable or shared library. 749 SHF_EXCLUDE = 0x80000000U, 750 751 // Start of target-specific flags. 752 753 /// XCORE_SHF_CP_SECTION - All sections with the "c" flag are grouped 754 /// together by the linker to form the constant pool and the cp register is 755 /// set to the start of the constant pool by the boot code. 756 XCORE_SHF_CP_SECTION = 0x800U, 757 758 /// XCORE_SHF_DP_SECTION - All sections with the "d" flag are grouped 759 /// together by the linker to form the data section and the dp register is 760 /// set to the start of the section by the boot code. 761 XCORE_SHF_DP_SECTION = 0x1000U, 762 763 SHF_MASKOS = 0x0ff00000, 764 765 // Bits indicating processor-specific flags. 766 SHF_MASKPROC = 0xf0000000, 767 768 // If an object file section does not have this flag set, then it may not hold 769 // more than 2GB and can be freely referred to in objects using smaller code 770 // models. Otherwise, only objects using larger code models can refer to them. 771 // For example, a medium code model object can refer to data in a section that 772 // sets this flag besides being able to refer to data in a section that does 773 // not set it; likewise, a small code model object can refer only to code in a 774 // section that does not set this flag. 775 SHF_X86_64_LARGE = 0x10000000, 776 777 // All sections with the GPREL flag are grouped into a global data area 778 // for faster accesses 779 SHF_HEX_GPREL = 0x10000000, 780 781 // Section contains text/data which may be replicated in other sections. 782 // Linker must retain only one copy. 783 SHF_MIPS_NODUPES = 0x01000000, 784 785 // Linker must generate implicit hidden weak names. 786 SHF_MIPS_NAMES = 0x02000000, 787 788 // Section data local to process. 789 SHF_MIPS_LOCAL = 0x04000000, 790 791 // Do not strip this section. 792 SHF_MIPS_NOSTRIP = 0x08000000, 793 794 // Section must be part of global data area. 795 SHF_MIPS_GPREL = 0x10000000, 796 797 // This section should be merged. 798 SHF_MIPS_MERGE = 0x20000000, 799 800 // Address size to be inferred from section entry size. 801 SHF_MIPS_ADDR = 0x40000000, 802 803 // Section data is string data by default. 804 SHF_MIPS_STRING = 0x80000000, 805 806 SHF_AMDGPU_HSA_GLOBAL = 0x00100000, 807 SHF_AMDGPU_HSA_READONLY = 0x00200000, 808 SHF_AMDGPU_HSA_CODE = 0x00400000, 809 SHF_AMDGPU_HSA_AGENT = 0x00800000 810 }; 811 812 // Section Group Flags 813 enum : unsigned { 814 GRP_COMDAT = 0x1, 815 GRP_MASKOS = 0x0ff00000, 816 GRP_MASKPROC = 0xf0000000 817 }; 818 819 // Symbol table entries for ELF32. 820 struct Elf32_Sym { 821 Elf32_Word st_name; // Symbol name (index into string table) 822 Elf32_Addr st_value; // Value or address associated with the symbol 823 Elf32_Word st_size; // Size of the symbol 824 unsigned char st_info; // Symbol's type and binding attributes 825 unsigned char st_other; // Must be zero; reserved 826 Elf32_Half st_shndx; // Which section (header table index) it's defined in 827 828 // These accessors and mutators correspond to the ELF32_ST_BIND, 829 // ELF32_ST_TYPE, and ELF32_ST_INFO macros defined in the ELF specification: 830 unsigned char getBinding() const { return st_info >> 4; } 831 unsigned char getType() const { return st_info & 0x0f; } 832 void setBinding(unsigned char b) { setBindingAndType(b, getType()); } 833 void setType(unsigned char t) { setBindingAndType(getBinding(), t); } 834 void setBindingAndType(unsigned char b, unsigned char t) { 835 st_info = (b << 4) + (t & 0x0f); 836 } 837 }; 838 839 // Symbol table entries for ELF64. 840 struct Elf64_Sym { 841 Elf64_Word st_name; // Symbol name (index into string table) 842 unsigned char st_info; // Symbol's type and binding attributes 843 unsigned char st_other; // Must be zero; reserved 844 Elf64_Half st_shndx; // Which section (header tbl index) it's defined in 845 Elf64_Addr st_value; // Value or address associated with the symbol 846 Elf64_Xword st_size; // Size of the symbol 847 848 // These accessors and mutators are identical to those defined for ELF32 849 // symbol table entries. 850 unsigned char getBinding() const { return st_info >> 4; } 851 unsigned char getType() const { return st_info & 0x0f; } 852 void setBinding(unsigned char b) { setBindingAndType(b, getType()); } 853 void setType(unsigned char t) { setBindingAndType(getBinding(), t); } 854 void setBindingAndType(unsigned char b, unsigned char t) { 855 st_info = (b << 4) + (t & 0x0f); 856 } 857 }; 858 859 // The size (in bytes) of symbol table entries. 860 enum { 861 SYMENTRY_SIZE32 = 16, // 32-bit symbol entry size 862 SYMENTRY_SIZE64 = 24 // 64-bit symbol entry size. 863 }; 864 865 // Symbol bindings. 866 enum { 867 STB_LOCAL = 0, // Local symbol, not visible outside obj file containing def 868 STB_GLOBAL = 1, // Global symbol, visible to all object files being combined 869 STB_WEAK = 2, // Weak symbol, like global but lower-precedence 870 STB_GNU_UNIQUE = 10, 871 STB_LOOS = 10, // Lowest operating system-specific binding type 872 STB_HIOS = 12, // Highest operating system-specific binding type 873 STB_LOPROC = 13, // Lowest processor-specific binding type 874 STB_HIPROC = 15 // Highest processor-specific binding type 875 }; 876 877 // Symbol types. 878 enum { 879 STT_NOTYPE = 0, // Symbol's type is not specified 880 STT_OBJECT = 1, // Symbol is a data object (variable, array, etc.) 881 STT_FUNC = 2, // Symbol is executable code (function, etc.) 882 STT_SECTION = 3, // Symbol refers to a section 883 STT_FILE = 4, // Local, absolute symbol that refers to a file 884 STT_COMMON = 5, // An uninitialized common block 885 STT_TLS = 6, // Thread local data object 886 STT_GNU_IFUNC = 10, // GNU indirect function 887 STT_LOOS = 10, // Lowest operating system-specific symbol type 888 STT_HIOS = 12, // Highest operating system-specific symbol type 889 STT_LOPROC = 13, // Lowest processor-specific symbol type 890 STT_HIPROC = 15, // Highest processor-specific symbol type 891 892 // AMDGPU symbol types 893 STT_AMDGPU_HSA_KERNEL = 10, 894 STT_AMDGPU_HSA_INDIRECT_FUNCTION = 11, 895 STT_AMDGPU_HSA_METADATA = 12 896 }; 897 898 enum { 899 STV_DEFAULT = 0, // Visibility is specified by binding type 900 STV_INTERNAL = 1, // Defined by processor supplements 901 STV_HIDDEN = 2, // Not visible to other components 902 STV_PROTECTED = 3 // Visible in other components but not preemptable 903 }; 904 905 // Symbol number. 906 enum { 907 STN_UNDEF = 0 908 }; 909 910 // Special relocation symbols used in the MIPS64 ELF relocation entries 911 enum { 912 RSS_UNDEF = 0, // None 913 RSS_GP = 1, // Value of gp 914 RSS_GP0 = 2, // Value of gp used to create object being relocated 915 RSS_LOC = 3 // Address of location being relocated 916 }; 917 918 // Relocation entry, without explicit addend. 919 struct Elf32_Rel { 920 Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr) 921 Elf32_Word r_info; // Symbol table index and type of relocation to apply 922 923 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE, 924 // and ELF32_R_INFO macros defined in the ELF specification: 925 Elf32_Word getSymbol() const { return (r_info >> 8); } 926 unsigned char getType() const { return (unsigned char) (r_info & 0x0ff); } 927 void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); } 928 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); } 929 void setSymbolAndType(Elf32_Word s, unsigned char t) { 930 r_info = (s << 8) + t; 931 } 932 }; 933 934 // Relocation entry with explicit addend. 935 struct Elf32_Rela { 936 Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr) 937 Elf32_Word r_info; // Symbol table index and type of relocation to apply 938 Elf32_Sword r_addend; // Compute value for relocatable field by adding this 939 940 // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE, 941 // and ELF32_R_INFO macros defined in the ELF specification: 942 Elf32_Word getSymbol() const { return (r_info >> 8); } 943 unsigned char getType() const { return (unsigned char) (r_info & 0x0ff); } 944 void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); } 945 void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); } 946 void setSymbolAndType(Elf32_Word s, unsigned char t) { 947 r_info = (s << 8) + t; 948 } 949 }; 950 951 // Relocation entry, without explicit addend. 952 struct Elf64_Rel { 953 Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr). 954 Elf64_Xword r_info; // Symbol table index and type of relocation to apply. 955 956 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE, 957 // and ELF64_R_INFO macros defined in the ELF specification: 958 Elf64_Word getSymbol() const { return (r_info >> 32); } 959 Elf64_Word getType() const { 960 return (Elf64_Word) (r_info & 0xffffffffL); 961 } 962 void setSymbol(Elf64_Word s) { setSymbolAndType(s, getType()); } 963 void setType(Elf64_Word t) { setSymbolAndType(getSymbol(), t); } 964 void setSymbolAndType(Elf64_Word s, Elf64_Word t) { 965 r_info = ((Elf64_Xword)s << 32) + (t&0xffffffffL); 966 } 967 }; 968 969 // Relocation entry with explicit addend. 970 struct Elf64_Rela { 971 Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr). 972 Elf64_Xword r_info; // Symbol table index and type of relocation to apply. 973 Elf64_Sxword r_addend; // Compute value for relocatable field by adding this. 974 975 // These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE, 976 // and ELF64_R_INFO macros defined in the ELF specification: 977 Elf64_Word getSymbol() const { return (r_info >> 32); } 978 Elf64_Word getType() const { 979 return (Elf64_Word) (r_info & 0xffffffffL); 980 } 981 void setSymbol(Elf64_Word s) { setSymbolAndType(s, getType()); } 982 void setType(Elf64_Word t) { setSymbolAndType(getSymbol(), t); } 983 void setSymbolAndType(Elf64_Word s, Elf64_Word t) { 984 r_info = ((Elf64_Xword)s << 32) + (t&0xffffffffL); 985 } 986 }; 987 988 // Program header for ELF32. 989 struct Elf32_Phdr { 990 Elf32_Word p_type; // Type of segment 991 Elf32_Off p_offset; // File offset where segment is located, in bytes 992 Elf32_Addr p_vaddr; // Virtual address of beginning of segment 993 Elf32_Addr p_paddr; // Physical address of beginning of segment (OS-specific) 994 Elf32_Word p_filesz; // Num. of bytes in file image of segment (may be zero) 995 Elf32_Word p_memsz; // Num. of bytes in mem image of segment (may be zero) 996 Elf32_Word p_flags; // Segment flags 997 Elf32_Word p_align; // Segment alignment constraint 998 }; 999 1000 // Program header for ELF64. 1001 struct Elf64_Phdr { 1002 Elf64_Word p_type; // Type of segment 1003 Elf64_Word p_flags; // Segment flags 1004 Elf64_Off p_offset; // File offset where segment is located, in bytes 1005 Elf64_Addr p_vaddr; // Virtual address of beginning of segment 1006 Elf64_Addr p_paddr; // Physical addr of beginning of segment (OS-specific) 1007 Elf64_Xword p_filesz; // Num. of bytes in file image of segment (may be zero) 1008 Elf64_Xword p_memsz; // Num. of bytes in mem image of segment (may be zero) 1009 Elf64_Xword p_align; // Segment alignment constraint 1010 }; 1011 1012 // Segment types. 1013 enum { 1014 PT_NULL = 0, // Unused segment. 1015 PT_LOAD = 1, // Loadable segment. 1016 PT_DYNAMIC = 2, // Dynamic linking information. 1017 PT_INTERP = 3, // Interpreter pathname. 1018 PT_NOTE = 4, // Auxiliary information. 1019 PT_SHLIB = 5, // Reserved. 1020 PT_PHDR = 6, // The program header table itself. 1021 PT_TLS = 7, // The thread-local storage template. 1022 PT_LOOS = 0x60000000, // Lowest operating system-specific pt entry type. 1023 PT_HIOS = 0x6fffffff, // Highest operating system-specific pt entry type. 1024 PT_LOPROC = 0x70000000, // Lowest processor-specific program hdr entry type. 1025 PT_HIPROC = 0x7fffffff, // Highest processor-specific program hdr entry type. 1026 1027 // x86-64 program header types. 1028 // These all contain stack unwind tables. 1029 PT_GNU_EH_FRAME = 0x6474e550, 1030 PT_SUNW_EH_FRAME = 0x6474e550, 1031 PT_SUNW_UNWIND = 0x6464e550, 1032 1033 PT_GNU_STACK = 0x6474e551, // Indicates stack executability. 1034 PT_GNU_RELRO = 0x6474e552, // Read-only after relocation. 1035 1036 // ARM program header types. 1037 PT_ARM_ARCHEXT = 0x70000000, // Platform architecture compatibility info 1038 // These all contain stack unwind tables. 1039 PT_ARM_EXIDX = 0x70000001, 1040 PT_ARM_UNWIND = 0x70000001, 1041 1042 // MIPS program header types. 1043 PT_MIPS_REGINFO = 0x70000000, // Register usage information. 1044 PT_MIPS_RTPROC = 0x70000001, // Runtime procedure table. 1045 PT_MIPS_OPTIONS = 0x70000002, // Options segment. 1046 PT_MIPS_ABIFLAGS = 0x70000003, // Abiflags segment. 1047 1048 // AMDGPU program header types. 1049 PT_AMDGPU_HSA_LOAD_GLOBAL_PROGRAM = 0x60000000, 1050 PT_AMDGPU_HSA_LOAD_GLOBAL_AGENT = 0x60000001, 1051 PT_AMDGPU_HSA_LOAD_READONLY_AGENT = 0x60000002, 1052 PT_AMDGPU_HSA_LOAD_CODE_AGENT = 0x60000003, 1053 1054 // WebAssembly program header types. 1055 PT_WEBASSEMBLY_FUNCTIONS = PT_LOPROC + 0, // Function definitions. 1056 }; 1057 1058 // Segment flag bits. 1059 enum : unsigned { 1060 PF_X = 1, // Execute 1061 PF_W = 2, // Write 1062 PF_R = 4, // Read 1063 PF_MASKOS = 0x0ff00000,// Bits for operating system-specific semantics. 1064 PF_MASKPROC = 0xf0000000 // Bits for processor-specific semantics. 1065 }; 1066 1067 // Dynamic table entry for ELF32. 1068 struct Elf32_Dyn 1069 { 1070 Elf32_Sword d_tag; // Type of dynamic table entry. 1071 union 1072 { 1073 Elf32_Word d_val; // Integer value of entry. 1074 Elf32_Addr d_ptr; // Pointer value of entry. 1075 } d_un; 1076 }; 1077 1078 // Dynamic table entry for ELF64. 1079 struct Elf64_Dyn 1080 { 1081 Elf64_Sxword d_tag; // Type of dynamic table entry. 1082 union 1083 { 1084 Elf64_Xword d_val; // Integer value of entry. 1085 Elf64_Addr d_ptr; // Pointer value of entry. 1086 } d_un; 1087 }; 1088 1089 // Dynamic table entry tags. 1090 enum { 1091 DT_NULL = 0, // Marks end of dynamic array. 1092 DT_NEEDED = 1, // String table offset of needed library. 1093 DT_PLTRELSZ = 2, // Size of relocation entries in PLT. 1094 DT_PLTGOT = 3, // Address associated with linkage table. 1095 DT_HASH = 4, // Address of symbolic hash table. 1096 DT_STRTAB = 5, // Address of dynamic string table. 1097 DT_SYMTAB = 6, // Address of dynamic symbol table. 1098 DT_RELA = 7, // Address of relocation table (Rela entries). 1099 DT_RELASZ = 8, // Size of Rela relocation table. 1100 DT_RELAENT = 9, // Size of a Rela relocation entry. 1101 DT_STRSZ = 10, // Total size of the string table. 1102 DT_SYMENT = 11, // Size of a symbol table entry. 1103 DT_INIT = 12, // Address of initialization function. 1104 DT_FINI = 13, // Address of termination function. 1105 DT_SONAME = 14, // String table offset of a shared objects name. 1106 DT_RPATH = 15, // String table offset of library search path. 1107 DT_SYMBOLIC = 16, // Changes symbol resolution algorithm. 1108 DT_REL = 17, // Address of relocation table (Rel entries). 1109 DT_RELSZ = 18, // Size of Rel relocation table. 1110 DT_RELENT = 19, // Size of a Rel relocation entry. 1111 DT_PLTREL = 20, // Type of relocation entry used for linking. 1112 DT_DEBUG = 21, // Reserved for debugger. 1113 DT_TEXTREL = 22, // Relocations exist for non-writable segments. 1114 DT_JMPREL = 23, // Address of relocations associated with PLT. 1115 DT_BIND_NOW = 24, // Process all relocations before execution. 1116 DT_INIT_ARRAY = 25, // Pointer to array of initialization functions. 1117 DT_FINI_ARRAY = 26, // Pointer to array of termination functions. 1118 DT_INIT_ARRAYSZ = 27, // Size of DT_INIT_ARRAY. 1119 DT_FINI_ARRAYSZ = 28, // Size of DT_FINI_ARRAY. 1120 DT_RUNPATH = 29, // String table offset of lib search path. 1121 DT_FLAGS = 30, // Flags. 1122 DT_ENCODING = 32, // Values from here to DT_LOOS follow the rules 1123 // for the interpretation of the d_un union. 1124 1125 DT_PREINIT_ARRAY = 32, // Pointer to array of preinit functions. 1126 DT_PREINIT_ARRAYSZ = 33, // Size of the DT_PREINIT_ARRAY array. 1127 1128 DT_LOOS = 0x60000000, // Start of environment specific tags. 1129 DT_HIOS = 0x6FFFFFFF, // End of environment specific tags. 1130 DT_LOPROC = 0x70000000, // Start of processor specific tags. 1131 DT_HIPROC = 0x7FFFFFFF, // End of processor specific tags. 1132 1133 DT_GNU_HASH = 0x6FFFFEF5, // Reference to the GNU hash table. 1134 DT_TLSDESC_PLT = 0x6FFFFEF6, // Location of PLT entry for TLS descriptor resolver calls. 1135 DT_TLSDESC_GOT = 0x6FFFFEF7, // Location of GOT entry used by TLS descriptor resolver PLT entry. 1136 DT_RELACOUNT = 0x6FFFFFF9, // ELF32_Rela count. 1137 DT_RELCOUNT = 0x6FFFFFFA, // ELF32_Rel count. 1138 1139 DT_FLAGS_1 = 0X6FFFFFFB, // Flags_1. 1140 DT_VERSYM = 0x6FFFFFF0, // The address of .gnu.version section. 1141 DT_VERDEF = 0X6FFFFFFC, // The address of the version definition table. 1142 DT_VERDEFNUM = 0X6FFFFFFD, // The number of entries in DT_VERDEF. 1143 DT_VERNEED = 0X6FFFFFFE, // The address of the version Dependency table. 1144 DT_VERNEEDNUM = 0X6FFFFFFF, // The number of entries in DT_VERNEED. 1145 1146 // Mips specific dynamic table entry tags. 1147 DT_MIPS_RLD_VERSION = 0x70000001, // 32 bit version number for runtime 1148 // linker interface. 1149 DT_MIPS_TIME_STAMP = 0x70000002, // Time stamp. 1150 DT_MIPS_ICHECKSUM = 0x70000003, // Checksum of external strings 1151 // and common sizes. 1152 DT_MIPS_IVERSION = 0x70000004, // Index of version string 1153 // in string table. 1154 DT_MIPS_FLAGS = 0x70000005, // 32 bits of flags. 1155 DT_MIPS_BASE_ADDRESS = 0x70000006, // Base address of the segment. 1156 DT_MIPS_MSYM = 0x70000007, // Address of .msym section. 1157 DT_MIPS_CONFLICT = 0x70000008, // Address of .conflict section. 1158 DT_MIPS_LIBLIST = 0x70000009, // Address of .liblist section. 1159 DT_MIPS_LOCAL_GOTNO = 0x7000000a, // Number of local global offset 1160 // table entries. 1161 DT_MIPS_CONFLICTNO = 0x7000000b, // Number of entries 1162 // in the .conflict section. 1163 DT_MIPS_LIBLISTNO = 0x70000010, // Number of entries 1164 // in the .liblist section. 1165 DT_MIPS_SYMTABNO = 0x70000011, // Number of entries 1166 // in the .dynsym section. 1167 DT_MIPS_UNREFEXTNO = 0x70000012, // Index of first external dynamic symbol 1168 // not referenced locally. 1169 DT_MIPS_GOTSYM = 0x70000013, // Index of first dynamic symbol 1170 // in global offset table. 1171 DT_MIPS_HIPAGENO = 0x70000014, // Number of page table entries 1172 // in global offset table. 1173 DT_MIPS_RLD_MAP = 0x70000016, // Address of run time loader map, 1174 // used for debugging. 1175 DT_MIPS_DELTA_CLASS = 0x70000017, // Delta C++ class definition. 1176 DT_MIPS_DELTA_CLASS_NO = 0x70000018, // Number of entries 1177 // in DT_MIPS_DELTA_CLASS. 1178 DT_MIPS_DELTA_INSTANCE = 0x70000019, // Delta C++ class instances. 1179 DT_MIPS_DELTA_INSTANCE_NO = 0x7000001A, // Number of entries 1180 // in DT_MIPS_DELTA_INSTANCE. 1181 DT_MIPS_DELTA_RELOC = 0x7000001B, // Delta relocations. 1182 DT_MIPS_DELTA_RELOC_NO = 0x7000001C, // Number of entries 1183 // in DT_MIPS_DELTA_RELOC. 1184 DT_MIPS_DELTA_SYM = 0x7000001D, // Delta symbols that Delta 1185 // relocations refer to. 1186 DT_MIPS_DELTA_SYM_NO = 0x7000001E, // Number of entries 1187 // in DT_MIPS_DELTA_SYM. 1188 DT_MIPS_DELTA_CLASSSYM = 0x70000020, // Delta symbols that hold 1189 // class declarations. 1190 DT_MIPS_DELTA_CLASSSYM_NO = 0x70000021, // Number of entries 1191 // in DT_MIPS_DELTA_CLASSSYM. 1192 DT_MIPS_CXX_FLAGS = 0x70000022, // Flags indicating information 1193 // about C++ flavor. 1194 DT_MIPS_PIXIE_INIT = 0x70000023, // Pixie information. 1195 DT_MIPS_SYMBOL_LIB = 0x70000024, // Address of .MIPS.symlib 1196 DT_MIPS_LOCALPAGE_GOTIDX = 0x70000025, // The GOT index of the first PTE 1197 // for a segment 1198 DT_MIPS_LOCAL_GOTIDX = 0x70000026, // The GOT index of the first PTE 1199 // for a local symbol 1200 DT_MIPS_HIDDEN_GOTIDX = 0x70000027, // The GOT index of the first PTE 1201 // for a hidden symbol 1202 DT_MIPS_PROTECTED_GOTIDX = 0x70000028, // The GOT index of the first PTE 1203 // for a protected symbol 1204 DT_MIPS_OPTIONS = 0x70000029, // Address of `.MIPS.options'. 1205 DT_MIPS_INTERFACE = 0x7000002A, // Address of `.interface'. 1206 DT_MIPS_DYNSTR_ALIGN = 0x7000002B, // Unknown. 1207 DT_MIPS_INTERFACE_SIZE = 0x7000002C, // Size of the .interface section. 1208 DT_MIPS_RLD_TEXT_RESOLVE_ADDR = 0x7000002D, // Size of rld_text_resolve 1209 // function stored in the GOT. 1210 DT_MIPS_PERF_SUFFIX = 0x7000002E, // Default suffix of DSO to be added 1211 // by rld on dlopen() calls. 1212 DT_MIPS_COMPACT_SIZE = 0x7000002F, // Size of compact relocation 1213 // section (O32). 1214 DT_MIPS_GP_VALUE = 0x70000030, // GP value for auxiliary GOTs. 1215 DT_MIPS_AUX_DYNAMIC = 0x70000031, // Address of auxiliary .dynamic. 1216 DT_MIPS_PLTGOT = 0x70000032, // Address of the base of the PLTGOT. 1217 DT_MIPS_RWPLT = 0x70000034, // Points to the base 1218 // of a writable PLT. 1219 DT_MIPS_RLD_MAP_REL = 0x70000035, // Relative offset of run time loader 1220 // map, used for debugging. 1221 1222 // Sun machine-independent extensions. 1223 DT_AUXILIARY = 0x7FFFFFFD, // Shared object to load before self 1224 DT_FILTER = 0x7FFFFFFF // Shared object to get values from 1225 }; 1226 1227 // DT_FLAGS values. 1228 enum { 1229 DF_ORIGIN = 0x01, // The object may reference $ORIGIN. 1230 DF_SYMBOLIC = 0x02, // Search the shared lib before searching the exe. 1231 DF_TEXTREL = 0x04, // Relocations may modify a non-writable segment. 1232 DF_BIND_NOW = 0x08, // Process all relocations on load. 1233 DF_STATIC_TLS = 0x10 // Reject attempts to load dynamically. 1234 }; 1235 1236 // State flags selectable in the `d_un.d_val' element of the DT_FLAGS_1 entry. 1237 enum { 1238 DF_1_NOW = 0x00000001, // Set RTLD_NOW for this object. 1239 DF_1_GLOBAL = 0x00000002, // Set RTLD_GLOBAL for this object. 1240 DF_1_GROUP = 0x00000004, // Set RTLD_GROUP for this object. 1241 DF_1_NODELETE = 0x00000008, // Set RTLD_NODELETE for this object. 1242 DF_1_LOADFLTR = 0x00000010, // Trigger filtee loading at runtime. 1243 DF_1_INITFIRST = 0x00000020, // Set RTLD_INITFIRST for this object. 1244 DF_1_NOOPEN = 0x00000040, // Set RTLD_NOOPEN for this object. 1245 DF_1_ORIGIN = 0x00000080, // $ORIGIN must be handled. 1246 DF_1_DIRECT = 0x00000100, // Direct binding enabled. 1247 DF_1_TRANS = 0x00000200, 1248 DF_1_INTERPOSE = 0x00000400, // Object is used to interpose. 1249 DF_1_NODEFLIB = 0x00000800, // Ignore default lib search path. 1250 DF_1_NODUMP = 0x00001000, // Object can't be dldump'ed. 1251 DF_1_CONFALT = 0x00002000, // Configuration alternative created. 1252 DF_1_ENDFILTEE = 0x00004000, // Filtee terminates filters search. 1253 DF_1_DISPRELDNE = 0x00008000, // Disp reloc applied at build time. 1254 DF_1_DISPRELPND = 0x00010000, // Disp reloc applied at run-time. 1255 DF_1_NODIRECT = 0x00020000, // Object has no-direct binding. 1256 DF_1_IGNMULDEF = 0x00040000, 1257 DF_1_NOKSYMS = 0x00080000, 1258 DF_1_NOHDR = 0x00100000, 1259 DF_1_EDITED = 0x00200000, // Object is modified after built. 1260 DF_1_NORELOC = 0x00400000, 1261 DF_1_SYMINTPOSE = 0x00800000, // Object has individual interposers. 1262 DF_1_GLOBAUDIT = 0x01000000, // Global auditing required. 1263 DF_1_SINGLETON = 0x02000000 // Singleton symbols are used. 1264 }; 1265 1266 // DT_MIPS_FLAGS values. 1267 enum { 1268 RHF_NONE = 0x00000000, // No flags. 1269 RHF_QUICKSTART = 0x00000001, // Uses shortcut pointers. 1270 RHF_NOTPOT = 0x00000002, // Hash size is not a power of two. 1271 RHS_NO_LIBRARY_REPLACEMENT = 0x00000004, // Ignore LD_LIBRARY_PATH. 1272 RHF_NO_MOVE = 0x00000008, // DSO address may not be relocated. 1273 RHF_SGI_ONLY = 0x00000010, // SGI specific features. 1274 RHF_GUARANTEE_INIT = 0x00000020, // Guarantee that .init will finish 1275 // executing before any non-init 1276 // code in DSO is called. 1277 RHF_DELTA_C_PLUS_PLUS = 0x00000040, // Contains Delta C++ code. 1278 RHF_GUARANTEE_START_INIT = 0x00000080, // Guarantee that .init will start 1279 // executing before any non-init 1280 // code in DSO is called. 1281 RHF_PIXIE = 0x00000100, // Generated by pixie. 1282 RHF_DEFAULT_DELAY_LOAD = 0x00000200, // Delay-load DSO by default. 1283 RHF_REQUICKSTART = 0x00000400, // Object may be requickstarted 1284 RHF_REQUICKSTARTED = 0x00000800, // Object has been requickstarted 1285 RHF_CORD = 0x00001000, // Generated by cord. 1286 RHF_NO_UNRES_UNDEF = 0x00002000, // Object contains no unresolved 1287 // undef symbols. 1288 RHF_RLD_ORDER_SAFE = 0x00004000 // Symbol table is in a safe order. 1289 }; 1290 1291 // ElfXX_VerDef structure version (GNU versioning) 1292 enum { 1293 VER_DEF_NONE = 0, 1294 VER_DEF_CURRENT = 1 1295 }; 1296 1297 // VerDef Flags (ElfXX_VerDef::vd_flags) 1298 enum { 1299 VER_FLG_BASE = 0x1, 1300 VER_FLG_WEAK = 0x2, 1301 VER_FLG_INFO = 0x4 1302 }; 1303 1304 // Special constants for the version table. (SHT_GNU_versym/.gnu.version) 1305 enum { 1306 VER_NDX_LOCAL = 0, // Unversioned local symbol 1307 VER_NDX_GLOBAL = 1, // Unversioned global symbol 1308 VERSYM_VERSION = 0x7fff, // Version Index mask 1309 VERSYM_HIDDEN = 0x8000 // Hidden bit (non-default version) 1310 }; 1311 1312 // ElfXX_VerNeed structure version (GNU versioning) 1313 enum { 1314 VER_NEED_NONE = 0, 1315 VER_NEED_CURRENT = 1 1316 }; 1317 1318 // SHT_NOTE section types 1319 enum { 1320 NT_GNU_BUILD_ID = 3 1321 }; 1322 1323 // Compressed section header for ELF32. 1324 struct Elf32_Chdr { 1325 Elf32_Word ch_type; 1326 Elf32_Word ch_size; 1327 Elf32_Word ch_addralign; 1328 }; 1329 1330 // Compressed section header for ELF64. 1331 struct Elf64_Chdr { 1332 Elf64_Word ch_type; 1333 Elf64_Word ch_reserved; 1334 Elf64_Xword ch_size; 1335 Elf64_Xword ch_addralign; 1336 }; 1337 1338 // Legal values for ch_type field of compressed section header. 1339 enum { 1340 ELFCOMPRESS_ZLIB = 1, // ZLIB/DEFLATE algorithm. 1341 ELFCOMPRESS_LOOS = 0x60000000, // Start of OS-specific. 1342 ELFCOMPRESS_HIOS = 0x6fffffff, // End of OS-specific. 1343 ELFCOMPRESS_LOPROC = 0x70000000, // Start of processor-specific. 1344 ELFCOMPRESS_HIPROC = 0x7fffffff // End of processor-specific. 1345 }; 1346 1347 } // end namespace ELF 1348 1349 } // end namespace llvm 1350 1351 #endif 1352
