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llvm-mirror/include/llvm/BinaryFormat/ELF.h
Jake Ehrlich 5a896e10ed [llvm-readobj] Add experimental support for SHT_RELR sections 
This change adds experimental support for SHT_RELR sections, proposed
here: https://groups.google.com/forum/#!topic/generic-abi/bX460iggiKg

Definitions for the new ELF section type and dynamic array tags, as well
as the encoding used in the new section are all under discussion and are
subject to change. Use with caution!

Author: rahulchaudhry

Differential Revision: https://reviews.llvm.org/D47919

llvm-svn: 335922
2018-06-28 21:07:34 +00:00

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//===- llvm/BinaryFormat/ELF.h - ELF constants and structures ---*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This header contains common, non-processor-specific data structures and
// constants for the ELF file format.
//
// The details of the ELF32 bits in this file are largely based on the Tool
// Interface Standard (TIS) Executable and Linking Format (ELF) Specification
// Version 1.2, May 1995. The ELF64 stuff is based on ELF-64 Object File Format
// Version 1.5, Draft 2, May 1998 as well as OpenBSD header files.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_BINARYFORMAT_ELF_H
#define LLVM_BINARYFORMAT_ELF_H
#include <cstdint>
#include <cstring>
namespace llvm {
namespace ELF {
using Elf32_Addr = uint32_t; // Program address
using Elf32_Off = uint32_t; // File offset
using Elf32_Half = uint16_t;
using Elf32_Word = uint32_t;
using Elf32_Sword = int32_t;
using Elf64_Addr = uint64_t;
using Elf64_Off = uint64_t;
using Elf64_Half = uint16_t;
using Elf64_Word = uint32_t;
using Elf64_Sword = int32_t;
using Elf64_Xword = uint64_t;
using Elf64_Sxword = int64_t;
// Object file magic string.
static const char ElfMagic[] = {0x7f, 'E', 'L', 'F', '\0'};
// e_ident size and indices.
enum {
EI_MAG0 = 0, // File identification index.
EI_MAG1 = 1, // File identification index.
EI_MAG2 = 2, // File identification index.
EI_MAG3 = 3, // File identification index.
EI_CLASS = 4, // File class.
EI_DATA = 5, // Data encoding.
EI_VERSION = 6, // File version.
EI_OSABI = 7, // OS/ABI identification.
EI_ABIVERSION = 8, // ABI version.
EI_PAD = 9, // Start of padding bytes.
EI_NIDENT = 16 // Number of bytes in e_ident.
};
struct Elf32_Ehdr {
unsigned char e_ident[EI_NIDENT]; // ELF Identification bytes
Elf32_Half e_type; // Type of file (see ET_* below)
Elf32_Half e_machine; // Required architecture for this file (see EM_*)
Elf32_Word e_version; // Must be equal to 1
Elf32_Addr e_entry; // Address to jump to in order to start program
Elf32_Off e_phoff; // Program header table's file offset, in bytes
Elf32_Off e_shoff; // Section header table's file offset, in bytes
Elf32_Word e_flags; // Processor-specific flags
Elf32_Half e_ehsize; // Size of ELF header, in bytes
Elf32_Half e_phentsize; // Size of an entry in the program header table
Elf32_Half e_phnum; // Number of entries in the program header table
Elf32_Half e_shentsize; // Size of an entry in the section header table
Elf32_Half e_shnum; // Number of entries in the section header table
Elf32_Half e_shstrndx; // Sect hdr table index of sect name string table
bool checkMagic() const {
return (memcmp(e_ident, ElfMagic, strlen(ElfMagic))) == 0;
}
unsigned char getFileClass() const { return e_ident[EI_CLASS]; }
unsigned char getDataEncoding() const { return e_ident[EI_DATA]; }
};
// 64-bit ELF header. Fields are the same as for ELF32, but with different
// types (see above).
struct Elf64_Ehdr {
unsigned char e_ident[EI_NIDENT];
Elf64_Half e_type;
Elf64_Half e_machine;
Elf64_Word e_version;
Elf64_Addr e_entry;
Elf64_Off e_phoff;
Elf64_Off e_shoff;
Elf64_Word e_flags;
Elf64_Half e_ehsize;
Elf64_Half e_phentsize;
Elf64_Half e_phnum;
Elf64_Half e_shentsize;
Elf64_Half e_shnum;
Elf64_Half e_shstrndx;
bool checkMagic() const {
return (memcmp(e_ident, ElfMagic, strlen(ElfMagic))) == 0;
}
unsigned char getFileClass() const { return e_ident[EI_CLASS]; }
unsigned char getDataEncoding() const { return e_ident[EI_DATA]; }
};
// File types
enum {
ET_NONE = 0, // No file type
ET_REL = 1, // Relocatable file
ET_EXEC = 2, // Executable file
ET_DYN = 3, // Shared object file
ET_CORE = 4, // Core file
ET_LOPROC = 0xff00, // Beginning of processor-specific codes
ET_HIPROC = 0xffff // Processor-specific
};
// Versioning
enum { EV_NONE = 0, EV_CURRENT = 1 };
// Machine architectures
// See current registered ELF machine architectures at:
// http://www.uxsglobal.com/developers/gabi/latest/ch4.eheader.html
enum {
EM_NONE = 0, // No machine
EM_M32 = 1, // AT&T WE 32100
EM_SPARC = 2, // SPARC
EM_386 = 3, // Intel 386
EM_68K = 4, // Motorola 68000
EM_88K = 5, // Motorola 88000
EM_IAMCU = 6, // Intel MCU
EM_860 = 7, // Intel 80860
EM_MIPS = 8, // MIPS R3000
EM_S370 = 9, // IBM System/370
EM_MIPS_RS3_LE = 10, // MIPS RS3000 Little-endian
EM_PARISC = 15, // Hewlett-Packard PA-RISC
EM_VPP500 = 17, // Fujitsu VPP500
EM_SPARC32PLUS = 18, // Enhanced instruction set SPARC
EM_960 = 19, // Intel 80960
EM_PPC = 20, // PowerPC
EM_PPC64 = 21, // PowerPC64
EM_S390 = 22, // IBM System/390
EM_SPU = 23, // IBM SPU/SPC
EM_V800 = 36, // NEC V800
EM_FR20 = 37, // Fujitsu FR20
EM_RH32 = 38, // TRW RH-32
EM_RCE = 39, // Motorola RCE
EM_ARM = 40, // ARM
EM_ALPHA = 41, // DEC Alpha
EM_SH = 42, // Hitachi SH
EM_SPARCV9 = 43, // SPARC V9
EM_TRICORE = 44, // Siemens TriCore
EM_ARC = 45, // Argonaut RISC Core
EM_H8_300 = 46, // Hitachi H8/300
EM_H8_300H = 47, // Hitachi H8/300H
EM_H8S = 48, // Hitachi H8S
EM_H8_500 = 49, // Hitachi H8/500
EM_IA_64 = 50, // Intel IA-64 processor architecture
EM_MIPS_X = 51, // Stanford MIPS-X
EM_COLDFIRE = 52, // Motorola ColdFire
EM_68HC12 = 53, // Motorola M68HC12
EM_MMA = 54, // Fujitsu MMA Multimedia Accelerator
EM_PCP = 55, // Siemens PCP
EM_NCPU = 56, // Sony nCPU embedded RISC processor
EM_NDR1 = 57, // Denso NDR1 microprocessor
EM_STARCORE = 58, // Motorola Star*Core processor
EM_ME16 = 59, // Toyota ME16 processor
EM_ST100 = 60, // STMicroelectronics ST100 processor
EM_TINYJ = 61, // Advanced Logic Corp. TinyJ embedded processor family
EM_X86_64 = 62, // AMD x86-64 architecture
EM_PDSP = 63, // Sony DSP Processor
EM_PDP10 = 64, // Digital Equipment Corp. PDP-10
EM_PDP11 = 65, // Digital Equipment Corp. PDP-11
EM_FX66 = 66, // Siemens FX66 microcontroller
EM_ST9PLUS = 67, // STMicroelectronics ST9+ 8/16 bit microcontroller
EM_ST7 = 68, // STMicroelectronics ST7 8-bit microcontroller
EM_68HC16 = 69, // Motorola MC68HC16 Microcontroller
EM_68HC11 = 70, // Motorola MC68HC11 Microcontroller
EM_68HC08 = 71, // Motorola MC68HC08 Microcontroller
EM_68HC05 = 72, // Motorola MC68HC05 Microcontroller
EM_SVX = 73, // Silicon Graphics SVx
EM_ST19 = 74, // STMicroelectronics ST19 8-bit microcontroller
EM_VAX = 75, // Digital VAX
EM_CRIS = 76, // Axis Communications 32-bit embedded processor
EM_JAVELIN = 77, // Infineon Technologies 32-bit embedded processor
EM_FIREPATH = 78, // Element 14 64-bit DSP Processor
EM_ZSP = 79, // LSI Logic 16-bit DSP Processor
EM_MMIX = 80, // Donald Knuth's educational 64-bit processor
EM_HUANY = 81, // Harvard University machine-independent object files
EM_PRISM = 82, // SiTera Prism
EM_AVR = 83, // Atmel AVR 8-bit microcontroller
EM_FR30 = 84, // Fujitsu FR30
EM_D10V = 85, // Mitsubishi D10V
EM_D30V = 86, // Mitsubishi D30V
EM_V850 = 87, // NEC v850
EM_M32R = 88, // Mitsubishi M32R
EM_MN10300 = 89, // Matsushita MN10300
EM_MN10200 = 90, // Matsushita MN10200
EM_PJ = 91, // picoJava
EM_OPENRISC = 92, // OpenRISC 32-bit embedded processor
EM_ARC_COMPACT = 93, // ARC International ARCompact processor (old
// spelling/synonym: EM_ARC_A5)
EM_XTENSA = 94, // Tensilica Xtensa Architecture
EM_VIDEOCORE = 95, // Alphamosaic VideoCore processor
EM_TMM_GPP = 96, // Thompson Multimedia General Purpose Processor
EM_NS32K = 97, // National Semiconductor 32000 series
EM_TPC = 98, // Tenor Network TPC processor
EM_SNP1K = 99, // Trebia SNP 1000 processor
EM_ST200 = 100, // STMicroelectronics (www.st.com) ST200
EM_IP2K = 101, // Ubicom IP2xxx microcontroller family
EM_MAX = 102, // MAX Processor
EM_CR = 103, // National Semiconductor CompactRISC microprocessor
EM_F2MC16 = 104, // Fujitsu F2MC16
EM_MSP430 = 105, // Texas Instruments embedded microcontroller msp430
EM_BLACKFIN = 106, // Analog Devices Blackfin (DSP) processor
EM_SE_C33 = 107, // S1C33 Family of Seiko Epson processors
EM_SEP = 108, // Sharp embedded microprocessor
EM_ARCA = 109, // Arca RISC Microprocessor
EM_UNICORE = 110, // Microprocessor series from PKU-Unity Ltd. and MPRC
// of Peking University
EM_EXCESS = 111, // eXcess: 16/32/64-bit configurable embedded CPU
EM_DXP = 112, // Icera Semiconductor Inc. Deep Execution Processor
EM_ALTERA_NIOS2 = 113, // Altera Nios II soft-core processor
EM_CRX = 114, // National Semiconductor CompactRISC CRX
EM_XGATE = 115, // Motorola XGATE embedded processor
EM_C166 = 116, // Infineon C16x/XC16x processor
EM_M16C = 117, // Renesas M16C series microprocessors
EM_DSPIC30F = 118, // Microchip Technology dsPIC30F Digital Signal
// Controller
EM_CE = 119, // Freescale Communication Engine RISC core
EM_M32C = 120, // Renesas M32C series microprocessors
EM_TSK3000 = 131, // Altium TSK3000 core
EM_RS08 = 132, // Freescale RS08 embedded processor
EM_SHARC = 133, // Analog Devices SHARC family of 32-bit DSP
// processors
EM_ECOG2 = 134, // Cyan Technology eCOG2 microprocessor
EM_SCORE7 = 135, // Sunplus S+core7 RISC processor
EM_DSP24 = 136, // New Japan Radio (NJR) 24-bit DSP Processor
EM_VIDEOCORE3 = 137, // Broadcom VideoCore III processor
EM_LATTICEMICO32 = 138, // RISC processor for Lattice FPGA architecture
EM_SE_C17 = 139, // Seiko Epson C17 family
EM_TI_C6000 = 140, // The Texas Instruments TMS320C6000 DSP family
EM_TI_C2000 = 141, // The Texas Instruments TMS320C2000 DSP family
EM_TI_C5500 = 142, // The Texas Instruments TMS320C55x DSP family
EM_MMDSP_PLUS = 160, // STMicroelectronics 64bit VLIW Data Signal Processor
EM_CYPRESS_M8C = 161, // Cypress M8C microprocessor
EM_R32C = 162, // Renesas R32C series microprocessors
EM_TRIMEDIA = 163, // NXP Semiconductors TriMedia architecture family
EM_HEXAGON = 164, // Qualcomm Hexagon processor
EM_8051 = 165, // Intel 8051 and variants
EM_STXP7X = 166, // STMicroelectronics STxP7x family of configurable
// and extensible RISC processors
EM_NDS32 = 167, // Andes Technology compact code size embedded RISC
// processor family
EM_ECOG1 = 168, // Cyan Technology eCOG1X family
EM_ECOG1X = 168, // Cyan Technology eCOG1X family
EM_MAXQ30 = 169, // Dallas Semiconductor MAXQ30 Core Micro-controllers
EM_XIMO16 = 170, // New Japan Radio (NJR) 16-bit DSP Processor
EM_MANIK = 171, // M2000 Reconfigurable RISC Microprocessor
EM_CRAYNV2 = 172, // Cray Inc. NV2 vector architecture
EM_RX = 173, // Renesas RX family
EM_METAG = 174, // Imagination Technologies META processor
// architecture
EM_MCST_ELBRUS = 175, // MCST Elbrus general purpose hardware architecture
EM_ECOG16 = 176, // Cyan Technology eCOG16 family
EM_CR16 = 177, // National Semiconductor CompactRISC CR16 16-bit
// microprocessor
EM_ETPU = 178, // Freescale Extended Time Processing Unit
EM_SLE9X = 179, // Infineon Technologies SLE9X core
EM_L10M = 180, // Intel L10M
EM_K10M = 181, // Intel K10M
EM_AARCH64 = 183, // ARM AArch64
EM_AVR32 = 185, // Atmel Corporation 32-bit microprocessor family
EM_STM8 = 186, // STMicroeletronics STM8 8-bit microcontroller
EM_TILE64 = 187, // Tilera TILE64 multicore architecture family
EM_TILEPRO = 188, // Tilera TILEPro multicore architecture family
EM_CUDA = 190, // NVIDIA CUDA architecture
EM_TILEGX = 191, // Tilera TILE-Gx multicore architecture family
EM_CLOUDSHIELD = 192, // CloudShield architecture family
EM_COREA_1ST = 193, // KIPO-KAIST Core-A 1st generation processor family
EM_COREA_2ND = 194, // KIPO-KAIST Core-A 2nd generation processor family
EM_ARC_COMPACT2 = 195, // Synopsys ARCompact V2
EM_OPEN8 = 196, // Open8 8-bit RISC soft processor core
EM_RL78 = 197, // Renesas RL78 family
EM_VIDEOCORE5 = 198, // Broadcom VideoCore V processor
EM_78KOR = 199, // Renesas 78KOR family
EM_56800EX = 200, // Freescale 56800EX Digital Signal Controller (DSC)
EM_BA1 = 201, // Beyond BA1 CPU architecture
EM_BA2 = 202, // Beyond BA2 CPU architecture
EM_XCORE = 203, // XMOS xCORE processor family
EM_MCHP_PIC = 204, // Microchip 8-bit PIC(r) family
EM_INTEL205 = 205, // Reserved by Intel
EM_INTEL206 = 206, // Reserved by Intel
EM_INTEL207 = 207, // Reserved by Intel
EM_INTEL208 = 208, // Reserved by Intel
EM_INTEL209 = 209, // Reserved by Intel
EM_KM32 = 210, // KM211 KM32 32-bit processor
EM_KMX32 = 211, // KM211 KMX32 32-bit processor
EM_KMX16 = 212, // KM211 KMX16 16-bit processor
EM_KMX8 = 213, // KM211 KMX8 8-bit processor
EM_KVARC = 214, // KM211 KVARC processor
EM_CDP = 215, // Paneve CDP architecture family
EM_COGE = 216, // Cognitive Smart Memory Processor
EM_COOL = 217, // iCelero CoolEngine
EM_NORC = 218, // Nanoradio Optimized RISC
EM_CSR_KALIMBA = 219, // CSR Kalimba architecture family
EM_AMDGPU = 224, // AMD GPU architecture
EM_RISCV = 243, // RISC-V
EM_LANAI = 244, // Lanai 32-bit processor
EM_BPF = 247, // Linux kernel bpf virtual machine
// A request has been made to the maintainer of the official registry for
// such numbers for an official value for WebAssembly. As soon as one is
// allocated, this enum will be updated to use it.
EM_WEBASSEMBLY = 0x4157, // WebAssembly architecture
};
// Object file classes.
enum {
ELFCLASSNONE = 0,
ELFCLASS32 = 1, // 32-bit object file
ELFCLASS64 = 2 // 64-bit object file
};
// Object file byte orderings.
enum {
ELFDATANONE = 0, // Invalid data encoding.
ELFDATA2LSB = 1, // Little-endian object file
ELFDATA2MSB = 2 // Big-endian object file
};
// OS ABI identification.
enum {
ELFOSABI_NONE = 0, // UNIX System V ABI
ELFOSABI_HPUX = 1, // HP-UX operating system
ELFOSABI_NETBSD = 2, // NetBSD
ELFOSABI_GNU = 3, // GNU/Linux
ELFOSABI_LINUX = 3, // Historical alias for ELFOSABI_GNU.
ELFOSABI_HURD = 4, // GNU/Hurd
ELFOSABI_SOLARIS = 6, // Solaris
ELFOSABI_AIX = 7, // AIX
ELFOSABI_IRIX = 8, // IRIX
ELFOSABI_FREEBSD = 9, // FreeBSD
ELFOSABI_TRU64 = 10, // TRU64 UNIX
ELFOSABI_MODESTO = 11, // Novell Modesto
ELFOSABI_OPENBSD = 12, // OpenBSD
ELFOSABI_OPENVMS = 13, // OpenVMS
ELFOSABI_NSK = 14, // Hewlett-Packard Non-Stop Kernel
ELFOSABI_AROS = 15, // AROS
ELFOSABI_FENIXOS = 16, // FenixOS
ELFOSABI_CLOUDABI = 17, // Nuxi CloudABI
ELFOSABI_FIRST_ARCH = 64, // First architecture-specific OS ABI
ELFOSABI_AMDGPU_HSA = 64, // AMD HSA runtime
ELFOSABI_AMDGPU_PAL = 65, // AMD PAL runtime
ELFOSABI_AMDGPU_MESA3D = 66, // AMD GCN GPUs (GFX6+) for MESA runtime
ELFOSABI_ARM = 97, // ARM
ELFOSABI_C6000_ELFABI = 64, // Bare-metal TMS320C6000
ELFOSABI_C6000_LINUX = 65, // Linux TMS320C6000
ELFOSABI_STANDALONE = 255, // Standalone (embedded) application
ELFOSABI_LAST_ARCH = 255 // Last Architecture-specific OS ABI
};
#define ELF_RELOC(name, value) name = value,
// X86_64 relocations.
enum {
#include "ELFRelocs/x86_64.def"
};
// i386 relocations.
enum {
#include "ELFRelocs/i386.def"
};
// ELF Relocation types for PPC32
enum {
#include "ELFRelocs/PowerPC.def"
};
// Specific e_flags for PPC64
enum {
// e_flags bits specifying ABI:
// 1 for original ABI using function descriptors,
// 2 for revised ABI without function descriptors,
// 0 for unspecified or not using any features affected by the differences.
EF_PPC64_ABI = 3
};
// Special values for the st_other field in the symbol table entry for PPC64.
enum {
STO_PPC64_LOCAL_BIT = 5,
STO_PPC64_LOCAL_MASK = (7 << STO_PPC64_LOCAL_BIT)
};
static inline int64_t decodePPC64LocalEntryOffset(unsigned Other) {
unsigned Val = (Other & STO_PPC64_LOCAL_MASK) >> STO_PPC64_LOCAL_BIT;
return ((1 << Val) >> 2) << 2;
}
static inline unsigned encodePPC64LocalEntryOffset(int64_t Offset) {
unsigned Val =
(Offset >= 4 * 4 ? (Offset >= 8 * 4 ? (Offset >= 16 * 4 ? 6 : 5) : 4)
: (Offset >= 2 * 4 ? 3 : (Offset >= 1 * 4 ? 2 : 0)));
return Val << STO_PPC64_LOCAL_BIT;
}
// ELF Relocation types for PPC64
enum {
#include "ELFRelocs/PowerPC64.def"
};
// ELF Relocation types for AArch64
enum {
#include "ELFRelocs/AArch64.def"
};
// ARM Specific e_flags
enum : unsigned {
EF_ARM_SOFT_FLOAT = 0x00000200U,
EF_ARM_VFP_FLOAT = 0x00000400U,
EF_ARM_EABI_UNKNOWN = 0x00000000U,
EF_ARM_EABI_VER1 = 0x01000000U,
EF_ARM_EABI_VER2 = 0x02000000U,
EF_ARM_EABI_VER3 = 0x03000000U,
EF_ARM_EABI_VER4 = 0x04000000U,
EF_ARM_EABI_VER5 = 0x05000000U,
EF_ARM_EABIMASK = 0xFF000000U
};
// ELF Relocation types for ARM
enum {
#include "ELFRelocs/ARM.def"
};
// ARC Specific e_flags
enum : unsigned {
EF_ARC_MACH_MSK = 0x000000ff,
EF_ARC_OSABI_MSK = 0x00000f00,
E_ARC_MACH_ARC600 = 0x00000002,
E_ARC_MACH_ARC601 = 0x00000004,
E_ARC_MACH_ARC700 = 0x00000003,
EF_ARC_CPU_ARCV2EM = 0x00000005,
EF_ARC_CPU_ARCV2HS = 0x00000006,
E_ARC_OSABI_ORIG = 0x00000000,
E_ARC_OSABI_V2 = 0x00000200,
E_ARC_OSABI_V3 = 0x00000300,
E_ARC_OSABI_V4 = 0x00000400,
EF_ARC_PIC = 0x00000100
};
// ELF Relocation types for ARC
enum {
#include "ELFRelocs/ARC.def"
};
// AVR specific e_flags
enum : unsigned {
EF_AVR_ARCH_AVR1 = 1,
EF_AVR_ARCH_AVR2 = 2,
EF_AVR_ARCH_AVR25 = 25,
EF_AVR_ARCH_AVR3 = 3,
EF_AVR_ARCH_AVR31 = 31,
EF_AVR_ARCH_AVR35 = 35,
EF_AVR_ARCH_AVR4 = 4,
EF_AVR_ARCH_AVR5 = 5,
EF_AVR_ARCH_AVR51 = 51,
EF_AVR_ARCH_AVR6 = 6,
EF_AVR_ARCH_AVRTINY = 100,
EF_AVR_ARCH_XMEGA1 = 101,
EF_AVR_ARCH_XMEGA2 = 102,
EF_AVR_ARCH_XMEGA3 = 103,
EF_AVR_ARCH_XMEGA4 = 104,
EF_AVR_ARCH_XMEGA5 = 105,
EF_AVR_ARCH_XMEGA6 = 106,
EF_AVR_ARCH_XMEGA7 = 107
};
// ELF Relocation types for AVR
enum {
#include "ELFRelocs/AVR.def"
};
// Mips Specific e_flags
enum : unsigned {
EF_MIPS_NOREORDER = 0x00000001, // Don't reorder instructions
EF_MIPS_PIC = 0x00000002, // Position independent code
EF_MIPS_CPIC = 0x00000004, // Call object with Position independent code
EF_MIPS_ABI2 = 0x00000020, // File uses N32 ABI
EF_MIPS_32BITMODE = 0x00000100, // Code compiled for a 64-bit machine
// in 32-bit mode
EF_MIPS_FP64 = 0x00000200, // Code compiled for a 32-bit machine
// but uses 64-bit FP registers
EF_MIPS_NAN2008 = 0x00000400, // Uses IEE 754-2008 NaN encoding
// ABI flags
EF_MIPS_ABI_O32 = 0x00001000, // This file follows the first MIPS 32 bit ABI
EF_MIPS_ABI_O64 = 0x00002000, // O32 ABI extended for 64-bit architecture.
EF_MIPS_ABI_EABI32 = 0x00003000, // EABI in 32 bit mode.
EF_MIPS_ABI_EABI64 = 0x00004000, // EABI in 64 bit mode.
EF_MIPS_ABI = 0x0000f000, // Mask for selecting EF_MIPS_ABI_ variant.
// MIPS machine variant
EF_MIPS_MACH_NONE = 0x00000000, // A standard MIPS implementation.
EF_MIPS_MACH_3900 = 0x00810000, // Toshiba R3900
EF_MIPS_MACH_4010 = 0x00820000, // LSI R4010
EF_MIPS_MACH_4100 = 0x00830000, // NEC VR4100
EF_MIPS_MACH_4650 = 0x00850000, // MIPS R4650
EF_MIPS_MACH_4120 = 0x00870000, // NEC VR4120
EF_MIPS_MACH_4111 = 0x00880000, // NEC VR4111/VR4181
EF_MIPS_MACH_SB1 = 0x008a0000, // Broadcom SB-1
EF_MIPS_MACH_OCTEON = 0x008b0000, // Cavium Networks Octeon
EF_MIPS_MACH_XLR = 0x008c0000, // RMI Xlr
EF_MIPS_MACH_OCTEON2 = 0x008d0000, // Cavium Networks Octeon2
EF_MIPS_MACH_OCTEON3 = 0x008e0000, // Cavium Networks Octeon3
EF_MIPS_MACH_5400 = 0x00910000, // NEC VR5400
EF_MIPS_MACH_5900 = 0x00920000, // MIPS R5900
EF_MIPS_MACH_5500 = 0x00980000, // NEC VR5500
EF_MIPS_MACH_9000 = 0x00990000, // Unknown
EF_MIPS_MACH_LS2E = 0x00a00000, // ST Microelectronics Loongson 2E
EF_MIPS_MACH_LS2F = 0x00a10000, // ST Microelectronics Loongson 2F
EF_MIPS_MACH_LS3A = 0x00a20000, // Loongson 3A
EF_MIPS_MACH = 0x00ff0000, // EF_MIPS_MACH_xxx selection mask
// ARCH_ASE
EF_MIPS_MICROMIPS = 0x02000000, // microMIPS
EF_MIPS_ARCH_ASE_M16 = 0x04000000, // Has Mips-16 ISA extensions
EF_MIPS_ARCH_ASE_MDMX = 0x08000000, // Has MDMX multimedia extensions
EF_MIPS_ARCH_ASE = 0x0f000000, // Mask for EF_MIPS_ARCH_ASE_xxx flags
// ARCH
EF_MIPS_ARCH_1 = 0x00000000, // MIPS1 instruction set
EF_MIPS_ARCH_2 = 0x10000000, // MIPS2 instruction set
EF_MIPS_ARCH_3 = 0x20000000, // MIPS3 instruction set
EF_MIPS_ARCH_4 = 0x30000000, // MIPS4 instruction set
EF_MIPS_ARCH_5 = 0x40000000, // MIPS5 instruction set
EF_MIPS_ARCH_32 = 0x50000000, // MIPS32 instruction set per linux not elf.h
EF_MIPS_ARCH_64 = 0x60000000, // MIPS64 instruction set per linux not elf.h
EF_MIPS_ARCH_32R2 = 0x70000000, // mips32r2, mips32r3, mips32r5
EF_MIPS_ARCH_64R2 = 0x80000000, // mips64r2, mips64r3, mips64r5
EF_MIPS_ARCH_32R6 = 0x90000000, // mips32r6
EF_MIPS_ARCH_64R6 = 0xa0000000, // mips64r6
EF_MIPS_ARCH = 0xf0000000 // Mask for applying EF_MIPS_ARCH_ variant
};
// ELF Relocation types for Mips
enum {
#include "ELFRelocs/Mips.def"
};
// Special values for the st_other field in the symbol table entry for MIPS.
enum {
STO_MIPS_OPTIONAL = 0x04, // Symbol whose definition is optional
STO_MIPS_PLT = 0x08, // PLT entry related dynamic table record
STO_MIPS_PIC = 0x20, // PIC func in an object mixes PIC/non-PIC
STO_MIPS_MICROMIPS = 0x80, // MIPS Specific ISA for MicroMips
STO_MIPS_MIPS16 = 0xf0 // MIPS Specific ISA for Mips16
};
// .MIPS.options section descriptor kinds
enum {
ODK_NULL = 0, // Undefined
ODK_REGINFO = 1, // Register usage information
ODK_EXCEPTIONS = 2, // Exception processing options
ODK_PAD = 3, // Section padding options
ODK_HWPATCH = 4, // Hardware patches applied
ODK_FILL = 5, // Linker fill value
ODK_TAGS = 6, // Space for tool identification
ODK_HWAND = 7, // Hardware AND patches applied
ODK_HWOR = 8, // Hardware OR patches applied
ODK_GP_GROUP = 9, // GP group to use for text/data sections
ODK_IDENT = 10, // ID information
ODK_PAGESIZE = 11 // Page size information
};
// Hexagon-specific e_flags
enum {
// Object processor version flags, bits[11:0]
EF_HEXAGON_MACH_V2 = 0x00000001, // Hexagon V2
EF_HEXAGON_MACH_V3 = 0x00000002, // Hexagon V3
EF_HEXAGON_MACH_V4 = 0x00000003, // Hexagon V4
EF_HEXAGON_MACH_V5 = 0x00000004, // Hexagon V5
EF_HEXAGON_MACH_V55 = 0x00000005, // Hexagon V55
EF_HEXAGON_MACH_V60 = 0x00000060, // Hexagon V60
EF_HEXAGON_MACH_V62 = 0x00000062, // Hexagon V62
EF_HEXAGON_MACH_V65 = 0x00000065, // Hexagon V65
// Highest ISA version flags
EF_HEXAGON_ISA_MACH = 0x00000000, // Same as specified in bits[11:0]
// of e_flags
EF_HEXAGON_ISA_V2 = 0x00000010, // Hexagon V2 ISA
EF_HEXAGON_ISA_V3 = 0x00000020, // Hexagon V3 ISA
EF_HEXAGON_ISA_V4 = 0x00000030, // Hexagon V4 ISA
EF_HEXAGON_ISA_V5 = 0x00000040, // Hexagon V5 ISA
EF_HEXAGON_ISA_V55 = 0x00000050, // Hexagon V55 ISA
EF_HEXAGON_ISA_V60 = 0x00000060, // Hexagon V60 ISA
EF_HEXAGON_ISA_V62 = 0x00000062, // Hexagon V62 ISA
EF_HEXAGON_ISA_V65 = 0x00000065, // Hexagon V65 ISA
};
// Hexagon-specific section indexes for common small data
enum {
SHN_HEXAGON_SCOMMON = 0xff00, // Other access sizes
SHN_HEXAGON_SCOMMON_1 = 0xff01, // Byte-sized access
SHN_HEXAGON_SCOMMON_2 = 0xff02, // Half-word-sized access
SHN_HEXAGON_SCOMMON_4 = 0xff03, // Word-sized access
SHN_HEXAGON_SCOMMON_8 = 0xff04 // Double-word-size access
};
// ELF Relocation types for Hexagon
enum {
#include "ELFRelocs/Hexagon.def"
};
// ELF Relocation type for Lanai.
enum {
#include "ELFRelocs/Lanai.def"
};
// RISCV Specific e_flags
enum : unsigned {
EF_RISCV_RVC = 0x0001,
EF_RISCV_FLOAT_ABI = 0x0006,
EF_RISCV_FLOAT_ABI_SOFT = 0x0000,
EF_RISCV_FLOAT_ABI_SINGLE = 0x0002,
EF_RISCV_FLOAT_ABI_DOUBLE = 0x0004,
EF_RISCV_FLOAT_ABI_QUAD = 0x0006,
EF_RISCV_RVE = 0x0008
};
// ELF Relocation types for RISC-V
enum {
#include "ELFRelocs/RISCV.def"
};
// ELF Relocation types for S390/zSeries
enum {
#include "ELFRelocs/SystemZ.def"
};
// ELF Relocation type for Sparc.
enum {
#include "ELFRelocs/Sparc.def"
};
// ELF Relocation types for WebAssembly
enum {
#include "ELFRelocs/WebAssembly.def"
};
// AMDGPU specific e_flags.
enum : unsigned {
// Processor selection mask for EF_AMDGPU_MACH_* values.
EF_AMDGPU_MACH = 0x0ff,
// Not specified processor.
EF_AMDGPU_MACH_NONE = 0x000,
// R600-based processors.
// Radeon HD 2000/3000 Series (R600).
EF_AMDGPU_MACH_R600_R600 = 0x001,
EF_AMDGPU_MACH_R600_R630 = 0x002,
EF_AMDGPU_MACH_R600_RS880 = 0x003,
EF_AMDGPU_MACH_R600_RV670 = 0x004,
// Radeon HD 4000 Series (R700).
EF_AMDGPU_MACH_R600_RV710 = 0x005,
EF_AMDGPU_MACH_R600_RV730 = 0x006,
EF_AMDGPU_MACH_R600_RV770 = 0x007,
// Radeon HD 5000 Series (Evergreen).
EF_AMDGPU_MACH_R600_CEDAR = 0x008,
EF_AMDGPU_MACH_R600_CYPRESS = 0x009,
EF_AMDGPU_MACH_R600_JUNIPER = 0x00a,
EF_AMDGPU_MACH_R600_REDWOOD = 0x00b,
EF_AMDGPU_MACH_R600_SUMO = 0x00c,
// Radeon HD 6000 Series (Northern Islands).
EF_AMDGPU_MACH_R600_BARTS = 0x00d,
EF_AMDGPU_MACH_R600_CAICOS = 0x00e,
EF_AMDGPU_MACH_R600_CAYMAN = 0x00f,
EF_AMDGPU_MACH_R600_TURKS = 0x010,
// Reserved for R600-based processors.
EF_AMDGPU_MACH_R600_RESERVED_FIRST = 0x011,
EF_AMDGPU_MACH_R600_RESERVED_LAST = 0x01f,
// First/last R600-based processors.
EF_AMDGPU_MACH_R600_FIRST = EF_AMDGPU_MACH_R600_R600,
EF_AMDGPU_MACH_R600_LAST = EF_AMDGPU_MACH_R600_TURKS,
// AMDGCN-based processors.
// AMDGCN GFX6.
EF_AMDGPU_MACH_AMDGCN_GFX600 = 0x020,
EF_AMDGPU_MACH_AMDGCN_GFX601 = 0x021,
// AMDGCN GFX7.
EF_AMDGPU_MACH_AMDGCN_GFX700 = 0x022,
EF_AMDGPU_MACH_AMDGCN_GFX701 = 0x023,
EF_AMDGPU_MACH_AMDGCN_GFX702 = 0x024,
EF_AMDGPU_MACH_AMDGCN_GFX703 = 0x025,
EF_AMDGPU_MACH_AMDGCN_GFX704 = 0x026,
// AMDGCN GFX8.
EF_AMDGPU_MACH_AMDGCN_GFX801 = 0x028,
EF_AMDGPU_MACH_AMDGCN_GFX802 = 0x029,
EF_AMDGPU_MACH_AMDGCN_GFX803 = 0x02a,
EF_AMDGPU_MACH_AMDGCN_GFX810 = 0x02b,
// AMDGCN GFX9.
EF_AMDGPU_MACH_AMDGCN_GFX900 = 0x02c,
EF_AMDGPU_MACH_AMDGCN_GFX902 = 0x02d,
EF_AMDGPU_MACH_AMDGCN_GFX904 = 0x02e,
EF_AMDGPU_MACH_AMDGCN_GFX906 = 0x02f,
// Reserved for AMDGCN-based processors.
EF_AMDGPU_MACH_AMDGCN_RESERVED0 = 0x027,
EF_AMDGPU_MACH_AMDGCN_RESERVED1 = 0x030,
// First/last AMDGCN-based processors.
EF_AMDGPU_MACH_AMDGCN_FIRST = EF_AMDGPU_MACH_AMDGCN_GFX600,
EF_AMDGPU_MACH_AMDGCN_LAST = EF_AMDGPU_MACH_AMDGCN_GFX906,
// Indicates if the xnack target feature is enabled for all code contained in
// the object.
EF_AMDGPU_XNACK = 0x100,
};
// ELF Relocation types for AMDGPU
enum {
#include "ELFRelocs/AMDGPU.def"
};
// ELF Relocation types for BPF
enum {
#include "ELFRelocs/BPF.def"
};
#undef ELF_RELOC
// Section header.
struct Elf32_Shdr {
Elf32_Word sh_name; // Section name (index into string table)
Elf32_Word sh_type; // Section type (SHT_*)
Elf32_Word sh_flags; // Section flags (SHF_*)
Elf32_Addr sh_addr; // Address where section is to be loaded
Elf32_Off sh_offset; // File offset of section data, in bytes
Elf32_Word sh_size; // Size of section, in bytes
Elf32_Word sh_link; // Section type-specific header table index link
Elf32_Word sh_info; // Section type-specific extra information
Elf32_Word sh_addralign; // Section address alignment
Elf32_Word sh_entsize; // Size of records contained within the section
};
// Section header for ELF64 - same fields as ELF32, different types.
struct Elf64_Shdr {
Elf64_Word sh_name;
Elf64_Word sh_type;
Elf64_Xword sh_flags;
Elf64_Addr sh_addr;
Elf64_Off sh_offset;
Elf64_Xword sh_size;
Elf64_Word sh_link;
Elf64_Word sh_info;
Elf64_Xword sh_addralign;
Elf64_Xword sh_entsize;
};
// Special section indices.
enum {
SHN_UNDEF = 0, // Undefined, missing, irrelevant, or meaningless
SHN_LORESERVE = 0xff00, // Lowest reserved index
SHN_LOPROC = 0xff00, // Lowest processor-specific index
SHN_HIPROC = 0xff1f, // Highest processor-specific index
SHN_LOOS = 0xff20, // Lowest operating system-specific index
SHN_HIOS = 0xff3f, // Highest operating system-specific index
SHN_ABS = 0xfff1, // Symbol has absolute value; does not need relocation
SHN_COMMON = 0xfff2, // FORTRAN COMMON or C external global variables
SHN_XINDEX = 0xffff, // Mark that the index is >= SHN_LORESERVE
SHN_HIRESERVE = 0xffff // Highest reserved index
};
// Section types.
enum : unsigned {
SHT_NULL = 0, // No associated section (inactive entry).
SHT_PROGBITS = 1, // Program-defined contents.
SHT_SYMTAB = 2, // Symbol table.
SHT_STRTAB = 3, // String table.
SHT_RELA = 4, // Relocation entries; explicit addends.
SHT_HASH = 5, // Symbol hash table.
SHT_DYNAMIC = 6, // Information for dynamic linking.
SHT_NOTE = 7, // Information about the file.
SHT_NOBITS = 8, // Data occupies no space in the file.
SHT_REL = 9, // Relocation entries; no explicit addends.
SHT_SHLIB = 10, // Reserved.
SHT_DYNSYM = 11, // Symbol table.
SHT_INIT_ARRAY = 14, // Pointers to initialization functions.
SHT_FINI_ARRAY = 15, // Pointers to termination functions.
SHT_PREINIT_ARRAY = 16, // Pointers to pre-init functions.
SHT_GROUP = 17, // Section group.
SHT_SYMTAB_SHNDX = 18, // Indices for SHN_XINDEX entries.
// Experimental support for SHT_RELR sections. For details, see proposal
// at https://groups.google.com/forum/#!topic/generic-abi/bX460iggiKg
SHT_RELR = 19, // Relocation entries; only offsets.
SHT_LOOS = 0x60000000, // Lowest operating system-specific type.
// Android packed relocation section types.
// https://android.googlesource.com/platform/bionic/+/6f12bfece5dcc01325e0abba56a46b1bcf991c69/tools/relocation_packer/src/elf_file.cc#37
SHT_ANDROID_REL = 0x60000001,
SHT_ANDROID_RELA = 0x60000002,
SHT_LLVM_ODRTAB = 0x6fff4c00, // LLVM ODR table.
SHT_LLVM_LINKER_OPTIONS = 0x6fff4c01, // LLVM Linker Options.
SHT_LLVM_CALL_GRAPH_PROFILE = 0x6fff4c02, // LLVM Call Graph Profile.
// Android's experimental support for SHT_RELR sections.
// https://android.googlesource.com/platform/bionic/+/b7feec74547f84559a1467aca02708ff61346d2a/libc/include/elf.h#512
SHT_ANDROID_RELR = 0x6fffff00, // Relocation entries; only offsets.
SHT_GNU_ATTRIBUTES = 0x6ffffff5, // Object attributes.
SHT_GNU_HASH = 0x6ffffff6, // GNU-style hash table.
SHT_GNU_verdef = 0x6ffffffd, // GNU version definitions.
SHT_GNU_verneed = 0x6ffffffe, // GNU version references.
SHT_GNU_versym = 0x6fffffff, // GNU symbol versions table.
SHT_HIOS = 0x6fffffff, // Highest operating system-specific type.
SHT_LOPROC = 0x70000000, // Lowest processor arch-specific type.
// Fixme: All this is duplicated in MCSectionELF. Why??
// Exception Index table
SHT_ARM_EXIDX = 0x70000001U,
// BPABI DLL dynamic linking pre-emption map
SHT_ARM_PREEMPTMAP = 0x70000002U,
// Object file compatibility attributes
SHT_ARM_ATTRIBUTES = 0x70000003U,
SHT_ARM_DEBUGOVERLAY = 0x70000004U,
SHT_ARM_OVERLAYSECTION = 0x70000005U,
SHT_HEX_ORDERED = 0x70000000, // Link editor is to sort the entries in
// this section based on their sizes
SHT_X86_64_UNWIND = 0x70000001, // Unwind information
SHT_MIPS_REGINFO = 0x70000006, // Register usage information
SHT_MIPS_OPTIONS = 0x7000000d, // General options
SHT_MIPS_DWARF = 0x7000001e, // DWARF debugging section.
SHT_MIPS_ABIFLAGS = 0x7000002a, // ABI information.
SHT_HIPROC = 0x7fffffff, // Highest processor arch-specific type.
SHT_LOUSER = 0x80000000, // Lowest type reserved for applications.
SHT_HIUSER = 0xffffffff // Highest type reserved for applications.
};
// Section flags.
enum : unsigned {
// Section data should be writable during execution.
SHF_WRITE = 0x1,
// Section occupies memory during program execution.
SHF_ALLOC = 0x2,
// Section contains executable machine instructions.
SHF_EXECINSTR = 0x4,
// The data in this section may be merged.
SHF_MERGE = 0x10,
// The data in this section is null-terminated strings.
SHF_STRINGS = 0x20,
// A field in this section holds a section header table index.
SHF_INFO_LINK = 0x40U,
// Adds special ordering requirements for link editors.
SHF_LINK_ORDER = 0x80U,
// This section requires special OS-specific processing to avoid incorrect
// behavior.
SHF_OS_NONCONFORMING = 0x100U,
// This section is a member of a section group.
SHF_GROUP = 0x200U,
// This section holds Thread-Local Storage.
SHF_TLS = 0x400U,
// Identifies a section containing compressed data.
SHF_COMPRESSED = 0x800U,
// This section is excluded from the final executable or shared library.
SHF_EXCLUDE = 0x80000000U,
// Start of target-specific flags.
SHF_MASKOS = 0x0ff00000,
// Bits indicating processor-specific flags.
SHF_MASKPROC = 0xf0000000,
/// All sections with the "d" flag are grouped together by the linker to form
/// the data section and the dp register is set to the start of the section by
/// the boot code.
XCORE_SHF_DP_SECTION = 0x10000000,
/// All sections with the "c" flag are grouped together by the linker to form
/// the constant pool and the cp register is set to the start of the constant
/// pool by the boot code.
XCORE_SHF_CP_SECTION = 0x20000000,
// If an object file section does not have this flag set, then it may not hold
// more than 2GB and can be freely referred to in objects using smaller code
// models. Otherwise, only objects using larger code models can refer to them.
// For example, a medium code model object can refer to data in a section that
// sets this flag besides being able to refer to data in a section that does
// not set it; likewise, a small code model object can refer only to code in a
// section that does not set this flag.
SHF_X86_64_LARGE = 0x10000000,
// All sections with the GPREL flag are grouped into a global data area
// for faster accesses
SHF_HEX_GPREL = 0x10000000,
// Section contains text/data which may be replicated in other sections.
// Linker must retain only one copy.
SHF_MIPS_NODUPES = 0x01000000,
// Linker must generate implicit hidden weak names.
SHF_MIPS_NAMES = 0x02000000,
// Section data local to process.
SHF_MIPS_LOCAL = 0x04000000,
// Do not strip this section.
SHF_MIPS_NOSTRIP = 0x08000000,
// Section must be part of global data area.
SHF_MIPS_GPREL = 0x10000000,
// This section should be merged.
SHF_MIPS_MERGE = 0x20000000,
// Address size to be inferred from section entry size.
SHF_MIPS_ADDR = 0x40000000,
// Section data is string data by default.
SHF_MIPS_STRING = 0x80000000,
// Make code section unreadable when in execute-only mode
SHF_ARM_PURECODE = 0x20000000
};
// Section Group Flags
enum : unsigned {
GRP_COMDAT = 0x1,
GRP_MASKOS = 0x0ff00000,
GRP_MASKPROC = 0xf0000000
};
// Symbol table entries for ELF32.
struct Elf32_Sym {
Elf32_Word st_name; // Symbol name (index into string table)
Elf32_Addr st_value; // Value or address associated with the symbol
Elf32_Word st_size; // Size of the symbol
unsigned char st_info; // Symbol's type and binding attributes
unsigned char st_other; // Must be zero; reserved
Elf32_Half st_shndx; // Which section (header table index) it's defined in
// These accessors and mutators correspond to the ELF32_ST_BIND,
// ELF32_ST_TYPE, and ELF32_ST_INFO macros defined in the ELF specification:
unsigned char getBinding() const { return st_info >> 4; }
unsigned char getType() const { return st_info & 0x0f; }
void setBinding(unsigned char b) { setBindingAndType(b, getType()); }
void setType(unsigned char t) { setBindingAndType(getBinding(), t); }
void setBindingAndType(unsigned char b, unsigned char t) {
st_info = (b << 4) + (t & 0x0f);
}
};
// Symbol table entries for ELF64.
struct Elf64_Sym {
Elf64_Word st_name; // Symbol name (index into string table)
unsigned char st_info; // Symbol's type and binding attributes
unsigned char st_other; // Must be zero; reserved
Elf64_Half st_shndx; // Which section (header tbl index) it's defined in
Elf64_Addr st_value; // Value or address associated with the symbol
Elf64_Xword st_size; // Size of the symbol
// These accessors and mutators are identical to those defined for ELF32
// symbol table entries.
unsigned char getBinding() const { return st_info >> 4; }
unsigned char getType() const { return st_info & 0x0f; }
void setBinding(unsigned char b) { setBindingAndType(b, getType()); }
void setType(unsigned char t) { setBindingAndType(getBinding(), t); }
void setBindingAndType(unsigned char b, unsigned char t) {
st_info = (b << 4) + (t & 0x0f);
}
};
// The size (in bytes) of symbol table entries.
enum {
SYMENTRY_SIZE32 = 16, // 32-bit symbol entry size
SYMENTRY_SIZE64 = 24 // 64-bit symbol entry size.
};
// Symbol bindings.
enum {
STB_LOCAL = 0, // Local symbol, not visible outside obj file containing def
STB_GLOBAL = 1, // Global symbol, visible to all object files being combined
STB_WEAK = 2, // Weak symbol, like global but lower-precedence
STB_GNU_UNIQUE = 10,
STB_LOOS = 10, // Lowest operating system-specific binding type
STB_HIOS = 12, // Highest operating system-specific binding type
STB_LOPROC = 13, // Lowest processor-specific binding type
STB_HIPROC = 15 // Highest processor-specific binding type
};
// Symbol types.
enum {
STT_NOTYPE = 0, // Symbol's type is not specified
STT_OBJECT = 1, // Symbol is a data object (variable, array, etc.)
STT_FUNC = 2, // Symbol is executable code (function, etc.)
STT_SECTION = 3, // Symbol refers to a section
STT_FILE = 4, // Local, absolute symbol that refers to a file
STT_COMMON = 5, // An uninitialized common block
STT_TLS = 6, // Thread local data object
STT_GNU_IFUNC = 10, // GNU indirect function
STT_LOOS = 10, // Lowest operating system-specific symbol type
STT_HIOS = 12, // Highest operating system-specific symbol type
STT_LOPROC = 13, // Lowest processor-specific symbol type
STT_HIPROC = 15, // Highest processor-specific symbol type
// AMDGPU symbol types
STT_AMDGPU_HSA_KERNEL = 10
};
enum {
STV_DEFAULT = 0, // Visibility is specified by binding type
STV_INTERNAL = 1, // Defined by processor supplements
STV_HIDDEN = 2, // Not visible to other components
STV_PROTECTED = 3 // Visible in other components but not preemptable
};
// Symbol number.
enum { STN_UNDEF = 0 };
// Special relocation symbols used in the MIPS64 ELF relocation entries
enum {
RSS_UNDEF = 0, // None
RSS_GP = 1, // Value of gp
RSS_GP0 = 2, // Value of gp used to create object being relocated
RSS_LOC = 3 // Address of location being relocated
};
// Relocation entry, without explicit addend.
struct Elf32_Rel {
Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr)
Elf32_Word r_info; // Symbol table index and type of relocation to apply
// These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
// and ELF32_R_INFO macros defined in the ELF specification:
Elf32_Word getSymbol() const { return (r_info >> 8); }
unsigned char getType() const { return (unsigned char)(r_info & 0x0ff); }
void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); }
void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
void setSymbolAndType(Elf32_Word s, unsigned char t) {
r_info = (s << 8) + t;
}
};
// Relocation entry with explicit addend.
struct Elf32_Rela {
Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr)
Elf32_Word r_info; // Symbol table index and type of relocation to apply
Elf32_Sword r_addend; // Compute value for relocatable field by adding this
// These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE,
// and ELF32_R_INFO macros defined in the ELF specification:
Elf32_Word getSymbol() const { return (r_info >> 8); }
unsigned char getType() const { return (unsigned char)(r_info & 0x0ff); }
void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); }
void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
void setSymbolAndType(Elf32_Word s, unsigned char t) {
r_info = (s << 8) + t;
}
};
// Relocation entry without explicit addend or info (relative relocations only).
typedef Elf32_Word Elf32_Relr; // offset/bitmap for relative relocations
// Relocation entry, without explicit addend.
struct Elf64_Rel {
Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr).
Elf64_Xword r_info; // Symbol table index and type of relocation to apply.
// These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE,
// and ELF64_R_INFO macros defined in the ELF specification:
Elf64_Word getSymbol() const { return (r_info >> 32); }
Elf64_Word getType() const { return (Elf64_Word)(r_info & 0xffffffffL); }
void setSymbol(Elf64_Word s) { setSymbolAndType(s, getType()); }
void setType(Elf64_Word t) { setSymbolAndType(getSymbol(), t); }
void setSymbolAndType(Elf64_Word s, Elf64_Word t) {
r_info = ((Elf64_Xword)s << 32) + (t & 0xffffffffL);
}
};
// Relocation entry with explicit addend.
struct Elf64_Rela {
Elf64_Addr r_offset; // Location (file byte offset, or program virtual addr).
Elf64_Xword r_info; // Symbol table index and type of relocation to apply.
Elf64_Sxword r_addend; // Compute value for relocatable field by adding this.
// These accessors and mutators correspond to the ELF64_R_SYM, ELF64_R_TYPE,
// and ELF64_R_INFO macros defined in the ELF specification:
Elf64_Word getSymbol() const { return (r_info >> 32); }
Elf64_Word getType() const { return (Elf64_Word)(r_info & 0xffffffffL); }
void setSymbol(Elf64_Word s) { setSymbolAndType(s, getType()); }
void setType(Elf64_Word t) { setSymbolAndType(getSymbol(), t); }
void setSymbolAndType(Elf64_Word s, Elf64_Word t) {
r_info = ((Elf64_Xword)s << 32) + (t & 0xffffffffL);
}
};
// Relocation entry without explicit addend or info (relative relocations only).
typedef Elf64_Xword Elf64_Relr; // offset/bitmap for relative relocations
// Program header for ELF32.
struct Elf32_Phdr {
Elf32_Word p_type; // Type of segment
Elf32_Off p_offset; // File offset where segment is located, in bytes
Elf32_Addr p_vaddr; // Virtual address of beginning of segment
Elf32_Addr p_paddr; // Physical address of beginning of segment (OS-specific)
Elf32_Word p_filesz; // Num. of bytes in file image of segment (may be zero)
Elf32_Word p_memsz; // Num. of bytes in mem image of segment (may be zero)
Elf32_Word p_flags; // Segment flags
Elf32_Word p_align; // Segment alignment constraint
};
// Program header for ELF64.
struct Elf64_Phdr {
Elf64_Word p_type; // Type of segment
Elf64_Word p_flags; // Segment flags
Elf64_Off p_offset; // File offset where segment is located, in bytes
Elf64_Addr p_vaddr; // Virtual address of beginning of segment
Elf64_Addr p_paddr; // Physical addr of beginning of segment (OS-specific)
Elf64_Xword p_filesz; // Num. of bytes in file image of segment (may be zero)
Elf64_Xword p_memsz; // Num. of bytes in mem image of segment (may be zero)
Elf64_Xword p_align; // Segment alignment constraint
};
// Segment types.
enum {
PT_NULL = 0, // Unused segment.
PT_LOAD = 1, // Loadable segment.
PT_DYNAMIC = 2, // Dynamic linking information.
PT_INTERP = 3, // Interpreter pathname.
PT_NOTE = 4, // Auxiliary information.
PT_SHLIB = 5, // Reserved.
PT_PHDR = 6, // The program header table itself.
PT_TLS = 7, // The thread-local storage template.
PT_LOOS = 0x60000000, // Lowest operating system-specific pt entry type.
PT_HIOS = 0x6fffffff, // Highest operating system-specific pt entry type.
PT_LOPROC = 0x70000000, // Lowest processor-specific program hdr entry type.
PT_HIPROC = 0x7fffffff, // Highest processor-specific program hdr entry type.
// x86-64 program header types.
// These all contain stack unwind tables.
PT_GNU_EH_FRAME = 0x6474e550,
PT_SUNW_EH_FRAME = 0x6474e550,
PT_SUNW_UNWIND = 0x6464e550,
PT_GNU_STACK = 0x6474e551, // Indicates stack executability.
PT_GNU_RELRO = 0x6474e552, // Read-only after relocation.
PT_OPENBSD_RANDOMIZE = 0x65a3dbe6, // Fill with random data.
PT_OPENBSD_WXNEEDED = 0x65a3dbe7, // Program does W^X violations.
PT_OPENBSD_BOOTDATA = 0x65a41be6, // Section for boot arguments.
// ARM program header types.
PT_ARM_ARCHEXT = 0x70000000, // Platform architecture compatibility info
// These all contain stack unwind tables.
PT_ARM_EXIDX = 0x70000001,
PT_ARM_UNWIND = 0x70000001,
// MIPS program header types.
PT_MIPS_REGINFO = 0x70000000, // Register usage information.
PT_MIPS_RTPROC = 0x70000001, // Runtime procedure table.
PT_MIPS_OPTIONS = 0x70000002, // Options segment.
PT_MIPS_ABIFLAGS = 0x70000003, // Abiflags segment.
// WebAssembly program header types.
PT_WEBASSEMBLY_FUNCTIONS = PT_LOPROC + 0, // Function definitions.
};
// Segment flag bits.
enum : unsigned {
PF_X = 1, // Execute
PF_W = 2, // Write
PF_R = 4, // Read
PF_MASKOS = 0x0ff00000, // Bits for operating system-specific semantics.
PF_MASKPROC = 0xf0000000 // Bits for processor-specific semantics.
};
// Dynamic table entry for ELF32.
struct Elf32_Dyn {
Elf32_Sword d_tag; // Type of dynamic table entry.
union {
Elf32_Word d_val; // Integer value of entry.
Elf32_Addr d_ptr; // Pointer value of entry.
} d_un;
};
// Dynamic table entry for ELF64.
struct Elf64_Dyn {
Elf64_Sxword d_tag; // Type of dynamic table entry.
union {
Elf64_Xword d_val; // Integer value of entry.
Elf64_Addr d_ptr; // Pointer value of entry.
} d_un;
};
// Dynamic table entry tags.
enum {
#define DYNAMIC_TAG(name, value) DT_##name = value,
#include "DynamicTags.def"
#undef DYNAMIC_TAG
};
// DT_FLAGS values.
enum {
DF_ORIGIN = 0x01, // The object may reference $ORIGIN.
DF_SYMBOLIC = 0x02, // Search the shared lib before searching the exe.
DF_TEXTREL = 0x04, // Relocations may modify a non-writable segment.
DF_BIND_NOW = 0x08, // Process all relocations on load.
DF_STATIC_TLS = 0x10 // Reject attempts to load dynamically.
};
// State flags selectable in the `d_un.d_val' element of the DT_FLAGS_1 entry.
enum {
DF_1_NOW = 0x00000001, // Set RTLD_NOW for this object.
DF_1_GLOBAL = 0x00000002, // Set RTLD_GLOBAL for this object.
DF_1_GROUP = 0x00000004, // Set RTLD_GROUP for this object.
DF_1_NODELETE = 0x00000008, // Set RTLD_NODELETE for this object.
DF_1_LOADFLTR = 0x00000010, // Trigger filtee loading at runtime.
DF_1_INITFIRST = 0x00000020, // Set RTLD_INITFIRST for this object.
DF_1_NOOPEN = 0x00000040, // Set RTLD_NOOPEN for this object.
DF_1_ORIGIN = 0x00000080, // $ORIGIN must be handled.
DF_1_DIRECT = 0x00000100, // Direct binding enabled.
DF_1_TRANS = 0x00000200,
DF_1_INTERPOSE = 0x00000400, // Object is used to interpose.
DF_1_NODEFLIB = 0x00000800, // Ignore default lib search path.
DF_1_NODUMP = 0x00001000, // Object can't be dldump'ed.
DF_1_CONFALT = 0x00002000, // Configuration alternative created.
DF_1_ENDFILTEE = 0x00004000, // Filtee terminates filters search.
DF_1_DISPRELDNE = 0x00008000, // Disp reloc applied at build time.
DF_1_DISPRELPND = 0x00010000, // Disp reloc applied at run-time.
DF_1_NODIRECT = 0x00020000, // Object has no-direct binding.
DF_1_IGNMULDEF = 0x00040000,
DF_1_NOKSYMS = 0x00080000,
DF_1_NOHDR = 0x00100000,
DF_1_EDITED = 0x00200000, // Object is modified after built.
DF_1_NORELOC = 0x00400000,
DF_1_SYMINTPOSE = 0x00800000, // Object has individual interposers.
DF_1_GLOBAUDIT = 0x01000000, // Global auditing required.
DF_1_SINGLETON = 0x02000000 // Singleton symbols are used.
};
// DT_MIPS_FLAGS values.
enum {
RHF_NONE = 0x00000000, // No flags.
RHF_QUICKSTART = 0x00000001, // Uses shortcut pointers.
RHF_NOTPOT = 0x00000002, // Hash size is not a power of two.
RHS_NO_LIBRARY_REPLACEMENT = 0x00000004, // Ignore LD_LIBRARY_PATH.
RHF_NO_MOVE = 0x00000008, // DSO address may not be relocated.
RHF_SGI_ONLY = 0x00000010, // SGI specific features.
RHF_GUARANTEE_INIT = 0x00000020, // Guarantee that .init will finish
// executing before any non-init
// code in DSO is called.
RHF_DELTA_C_PLUS_PLUS = 0x00000040, // Contains Delta C++ code.
RHF_GUARANTEE_START_INIT = 0x00000080, // Guarantee that .init will start
// executing before any non-init
// code in DSO is called.
RHF_PIXIE = 0x00000100, // Generated by pixie.
RHF_DEFAULT_DELAY_LOAD = 0x00000200, // Delay-load DSO by default.
RHF_REQUICKSTART = 0x00000400, // Object may be requickstarted
RHF_REQUICKSTARTED = 0x00000800, // Object has been requickstarted
RHF_CORD = 0x00001000, // Generated by cord.
RHF_NO_UNRES_UNDEF = 0x00002000, // Object contains no unresolved
// undef symbols.
RHF_RLD_ORDER_SAFE = 0x00004000 // Symbol table is in a safe order.
};
// ElfXX_VerDef structure version (GNU versioning)
enum { VER_DEF_NONE = 0, VER_DEF_CURRENT = 1 };
// VerDef Flags (ElfXX_VerDef::vd_flags)
enum { VER_FLG_BASE = 0x1, VER_FLG_WEAK = 0x2, VER_FLG_INFO = 0x4 };
// Special constants for the version table. (SHT_GNU_versym/.gnu.version)
enum {
VER_NDX_LOCAL = 0, // Unversioned local symbol
VER_NDX_GLOBAL = 1, // Unversioned global symbol
VERSYM_VERSION = 0x7fff, // Version Index mask
VERSYM_HIDDEN = 0x8000 // Hidden bit (non-default version)
};
// ElfXX_VerNeed structure version (GNU versioning)
enum { VER_NEED_NONE = 0, VER_NEED_CURRENT = 1 };
// SHT_NOTE section types
enum {
NT_FREEBSD_THRMISC = 7,
NT_FREEBSD_PROCSTAT_PROC = 8,
NT_FREEBSD_PROCSTAT_FILES = 9,
NT_FREEBSD_PROCSTAT_VMMAP = 10,
NT_FREEBSD_PROCSTAT_GROUPS = 11,
NT_FREEBSD_PROCSTAT_UMASK = 12,
NT_FREEBSD_PROCSTAT_RLIMIT = 13,
NT_FREEBSD_PROCSTAT_OSREL = 14,
NT_FREEBSD_PROCSTAT_PSSTRINGS = 15,
NT_FREEBSD_PROCSTAT_AUXV = 16,
};
enum {
NT_GNU_ABI_TAG = 1,
NT_GNU_HWCAP = 2,
NT_GNU_BUILD_ID = 3,
NT_GNU_GOLD_VERSION = 4,
NT_GNU_PROPERTY_TYPE_0 = 5,
};
// Property types used in GNU_PROPERTY_TYPE_0 notes.
enum : unsigned {
GNU_PROPERTY_STACK_SIZE = 1,
GNU_PROPERTY_NO_COPY_ON_PROTECTED = 2,
GNU_PROPERTY_X86_FEATURE_1_AND = 0xc0000002
};
// CET properties
enum {
GNU_PROPERTY_X86_FEATURE_1_IBT = 1 << 0,
GNU_PROPERTY_X86_FEATURE_1_SHSTK = 1 << 1
};
// AMDGPU specific notes.
enum {
// Note types with values between 0 and 9 (inclusive) are reserved.
NT_AMD_AMDGPU_HSA_METADATA = 10,
NT_AMD_AMDGPU_ISA = 11,
NT_AMD_AMDGPU_PAL_METADATA = 12
};
enum {
GNU_ABI_TAG_LINUX = 0,
GNU_ABI_TAG_HURD = 1,
GNU_ABI_TAG_SOLARIS = 2,
GNU_ABI_TAG_FREEBSD = 3,
GNU_ABI_TAG_NETBSD = 4,
GNU_ABI_TAG_SYLLABLE = 5,
GNU_ABI_TAG_NACL = 6,
};
// Android packed relocation group flags.
enum {
RELOCATION_GROUPED_BY_INFO_FLAG = 1,
RELOCATION_GROUPED_BY_OFFSET_DELTA_FLAG = 2,
RELOCATION_GROUPED_BY_ADDEND_FLAG = 4,
RELOCATION_GROUP_HAS_ADDEND_FLAG = 8,
};
// Compressed section header for ELF32.
struct Elf32_Chdr {
Elf32_Word ch_type;
Elf32_Word ch_size;
Elf32_Word ch_addralign;
};
// Compressed section header for ELF64.
struct Elf64_Chdr {
Elf64_Word ch_type;
Elf64_Word ch_reserved;
Elf64_Xword ch_size;
Elf64_Xword ch_addralign;
};
// Node header for ELF32.
struct Elf32_Nhdr {
Elf32_Word n_namesz;
Elf32_Word n_descsz;
Elf32_Word n_type;
};
// Node header for ELF64.
struct Elf64_Nhdr {
Elf64_Word n_namesz;
Elf64_Word n_descsz;
Elf64_Word n_type;
};
// Legal values for ch_type field of compressed section header.
enum {
ELFCOMPRESS_ZLIB = 1, // ZLIB/DEFLATE algorithm.
ELFCOMPRESS_LOOS = 0x60000000, // Start of OS-specific.
ELFCOMPRESS_HIOS = 0x6fffffff, // End of OS-specific.
ELFCOMPRESS_LOPROC = 0x70000000, // Start of processor-specific.
ELFCOMPRESS_HIPROC = 0x7fffffff // End of processor-specific.
};
} // end namespace ELF
} // end namespace llvm
#endif // LLVM_BINARYFORMAT_ELF_H
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