#include <stdio.h>
#include <elf.h>
int main()
{
 Elf_Ehdr *ehdr;

 ehdr = (Elf_Ehdr *)0x08048000;

 printf("0x%02x%c%c%c\n",
	 ehdr->e_ident[EI_MAG0],
	 ehdr->e_ident[EI_MAG1],
	 ehdr->e_ident[EI_MAG2],
	 ehdr->e_ident[EI_MAG3]);
 exit (0);
}

//===- 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_C6000_ELFABI = 64, // Bare-metal TMS320C6000
 ELFOSABI_AMDGPU_HSA = 64, // AMD HSA runtime
 ELFOSABI_C6000_LINUX = 65, // Linux TMS320C6000
 ELFOSABI_ARM = 97, // ARM
 ELFOSABI_STANDALONE = 255 // Standalone (embedded) application
};

#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"};

// 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

 // 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
};

// 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"};

// 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"};

// 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.
 SHT_LOOS = 0x60000000, // Lowest operating system-specific type.
 SHT_LLVM_ODRTAB = 0x6fff4c00, // LLVM ODR table.
 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.
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);
 }
};

// 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 {
 DT_NULL = 0, // Marks end of dynamic array.
 DT_NEEDED = 1, // String table offset of needed library.
 DT_PLTRELSZ = 2, // Size of relocation entries in PLT.
 DT_PLTGOT = 3, // Address associated with linkage table.
 DT_HASH = 4, // Address of symbolic hash table.
 DT_STRTAB = 5, // Address of dynamic string table.
 DT_SYMTAB = 6, // Address of dynamic symbol table.
 DT_RELA = 7, // Address of relocation table (Rela entries).
 DT_RELASZ = 8, // Size of Rela relocation table.
 DT_RELAENT = 9, // Size of a Rela relocation entry.
 DT_STRSZ = 10, // Total size of the string table.
 DT_SYMENT = 11, // Size of a symbol table entry.
 DT_INIT = 12, // Address of initialization function.
 DT_FINI = 13, // Address of termination function.
 DT_SONAME = 14, // String table offset of a shared objects name.
 DT_RPATH = 15, // String table offset of library search path.
 DT_SYMBOLIC = 16, // Changes symbol resolution algorithm.
 DT_REL = 17, // Address of relocation table (Rel entries).
 DT_RELSZ = 18, // Size of Rel relocation table.
 DT_RELENT = 19, // Size of a Rel relocation entry.
 DT_PLTREL = 20, // Type of relocation entry used for linking.
 DT_DEBUG = 21, // Reserved for debugger.
 DT_TEXTREL = 22, // Relocations exist for non-writable segments.
 DT_JMPREL = 23, // Address of relocations associated with PLT.
 DT_BIND_NOW = 24, // Process all relocations before execution.
 DT_INIT_ARRAY = 25, // Pointer to array of initialization functions.
 DT_FINI_ARRAY = 26, // Pointer to array of termination functions.
 DT_INIT_ARRAYSZ = 27, // Size of DT_INIT_ARRAY.
 DT_FINI_ARRAYSZ = 28, // Size of DT_FINI_ARRAY.
 DT_RUNPATH = 29, // String table offset of lib search path.
 DT_FLAGS = 30, // Flags.
 DT_ENCODING = 32, // Values from here to DT_LOOS follow the rules
 // for the interpretation of the d_un union.

 DT_PREINIT_ARRAY = 32, // Pointer to array of preinit functions.
 DT_PREINIT_ARRAYSZ = 33, // Size of the DT_PREINIT_ARRAY array.

 DT_LOOS = 0x60000000, // Start of environment specific tags.
 DT_HIOS = 0x6FFFFFFF, // End of environment specific tags.
 DT_LOPROC = 0x70000000, // Start of processor specific tags.
 DT_HIPROC = 0x7FFFFFFF, // End of processor specific tags.

 DT_GNU_HASH = 0x6FFFFEF5, // Reference to the GNU hash table.
 DT_TLSDESC_PLT =
 0x6FFFFEF6, // Location of PLT entry for TLS descriptor resolver calls.
 DT_TLSDESC_GOT = 0x6FFFFEF7, // Location of GOT entry used by TLS descriptor
 // resolver PLT entry.
 DT_RELACOUNT = 0x6FFFFFF9, // ELF32_Rela count.
 DT_RELCOUNT = 0x6FFFFFFA, // ELF32_Rel count.

 DT_FLAGS_1 = 0X6FFFFFFB, // Flags_1.
 DT_VERSYM = 0x6FFFFFF0, // The address of .gnu.version section.
 DT_VERDEF = 0X6FFFFFFC, // The address of the version definition table.
 DT_VERDEFNUM = 0X6FFFFFFD, // The number of entries in DT_VERDEF.
 DT_VERNEED = 0X6FFFFFFE, // The address of the version Dependency table.
 DT_VERNEEDNUM = 0X6FFFFFFF, // The number of entries in DT_VERNEED.

 // Hexagon specific dynamic table entries
 DT_HEXAGON_SYMSZ = 0x70000000,
 DT_HEXAGON_VER = 0x70000001,
 DT_HEXAGON_PLT = 0x70000002,

 // Mips specific dynamic table entry tags.
 DT_MIPS_RLD_VERSION = 0x70000001, // 32 bit version number for runtime
 // linker interface.
 DT_MIPS_TIME_STAMP = 0x70000002, // Time stamp.
 DT_MIPS_ICHECKSUM = 0x70000003, // Checksum of external strings
 // and common sizes.
 DT_MIPS_IVERSION = 0x70000004, // Index of version string
 // in string table.
 DT_MIPS_FLAGS = 0x70000005, // 32 bits of flags.
 DT_MIPS_BASE_ADDRESS = 0x70000006, // Base address of the segment.
 DT_MIPS_MSYM = 0x70000007, // Address of .msym section.
 DT_MIPS_CONFLICT = 0x70000008, // Address of .conflict section.
 DT_MIPS_LIBLIST = 0x70000009, // Address of .liblist section.
 DT_MIPS_LOCAL_GOTNO = 0x7000000a, // Number of local global offset
 // table entries.
 DT_MIPS_CONFLICTNO = 0x7000000b, // Number of entries
 // in the .conflict section.
 DT_MIPS_LIBLISTNO = 0x70000010, // Number of entries
 // in the .liblist section.
 DT_MIPS_SYMTABNO = 0x70000011, // Number of entries
 // in the .dynsym section.
 DT_MIPS_UNREFEXTNO = 0x70000012, // Index of first external dynamic symbol
 // not referenced locally.
 DT_MIPS_GOTSYM = 0x70000013, // Index of first dynamic symbol
 // in global offset table.
 DT_MIPS_HIPAGENO = 0x70000014, // Number of page table entries
 // in global offset table.
 DT_MIPS_RLD_MAP = 0x70000016, // Address of run time loader map,
 // used for debugging.
 DT_MIPS_DELTA_CLASS = 0x70000017, // Delta C++ class definition.
 DT_MIPS_DELTA_CLASS_NO = 0x70000018, // Number of entries
 // in DT_MIPS_DELTA_CLASS.
 DT_MIPS_DELTA_INSTANCE = 0x70000019, // Delta C++ class instances.
 DT_MIPS_DELTA_INSTANCE_NO = 0x7000001A, // Number of entries
 // in DT_MIPS_DELTA_INSTANCE.
 DT_MIPS_DELTA_RELOC = 0x7000001B, // Delta relocations.
 DT_MIPS_DELTA_RELOC_NO = 0x7000001C, // Number of entries
 // in DT_MIPS_DELTA_RELOC.
 DT_MIPS_DELTA_SYM = 0x7000001D, // Delta symbols that Delta
 // relocations refer to.
 DT_MIPS_DELTA_SYM_NO = 0x7000001E, // Number of entries
 // in DT_MIPS_DELTA_SYM.
 DT_MIPS_DELTA_CLASSSYM = 0x70000020, // Delta symbols that hold
 // class declarations.
 DT_MIPS_DELTA_CLASSSYM_NO = 0x70000021, // Number of entries
 // in DT_MIPS_DELTA_CLASSSYM.
 DT_MIPS_CXX_FLAGS = 0x70000022, // Flags indicating information
 // about C++ flavor.
 DT_MIPS_PIXIE_INIT = 0x70000023, // Pixie information.
 DT_MIPS_SYMBOL_LIB = 0x70000024, // Address of .MIPS.symlib
 DT_MIPS_LOCALPAGE_GOTIDX = 0x70000025, // The GOT index of the first PTE
 // for a segment
 DT_MIPS_LOCAL_GOTIDX = 0x70000026, // The GOT index of the first PTE
 // for a local symbol
 DT_MIPS_HIDDEN_GOTIDX = 0x70000027, // The GOT index of the first PTE
 // for a hidden symbol
 DT_MIPS_PROTECTED_GOTIDX = 0x70000028, // The GOT index of the first PTE
 // for a protected symbol
 DT_MIPS_OPTIONS = 0x70000029, // Address of `.MIPS.options'.
 DT_MIPS_INTERFACE = 0x7000002A, // Address of `.interface'.
 DT_MIPS_DYNSTR_ALIGN = 0x7000002B, // Unknown.
 DT_MIPS_INTERFACE_SIZE = 0x7000002C, // Size of the .interface section.
 DT_MIPS_RLD_TEXT_RESOLVE_ADDR = 0x7000002D, // Size of rld_text_resolve
 // function stored in the GOT.
 DT_MIPS_PERF_SUFFIX = 0x7000002E, // Default suffix of DSO to be added
 // by rld on dlopen() calls.
 DT_MIPS_COMPACT_SIZE = 0x7000002F, // Size of compact relocation
 // section (O32).
 DT_MIPS_GP_VALUE = 0x70000030, // GP value for auxiliary GOTs.
 DT_MIPS_AUX_DYNAMIC = 0x70000031, // Address of auxiliary .dynamic.
 DT_MIPS_PLTGOT = 0x70000032, // Address of the base of the PLTGOT.
 DT_MIPS_RWPLT = 0x70000034, // Points to the base
 // of a writable PLT.
 DT_MIPS_RLD_MAP_REL = 0x70000035, // Relative offset of run time loader
 // map, used for debugging.

 // Sun machine-independent extensions.
 DT_AUXILIARY = 0x7FFFFFFD, // Shared object to load before self
 DT_FILTER = 0x7FFFFFFF // Shared object to get values from
};

// 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,
};

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,
};

// 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;
};

// 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