mirror of
https://github.com/c64scene-ar/llvm-6502.git
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to compile a working hello world on FreeBSD/PPC32. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136689 91177308-0d34-0410-b5e6-96231b3b80d8
842 lines
30 KiB
C++
842 lines
30 KiB
C++
//===-- llvm/Support/ELF.h - ELF constants and data structures --*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This header contains common, non-processor-specific data structures and
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// constants for the ELF file format.
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//
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// The details of the ELF32 bits in this file are largely based on the Tool
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// Interface Standard (TIS) Executable and Linking Format (ELF) Specification
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// Version 1.2, May 1995. The ELF64 stuff is based on ELF-64 Object File Format
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// Version 1.5, Draft 2, May 1998 as well as OpenBSD header files.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_ELF_H
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#define LLVM_SUPPORT_ELF_H
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#include "llvm/Support/DataTypes.h"
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#include <cstring>
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namespace llvm {
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namespace ELF {
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typedef uint32_t Elf32_Addr; // Program address
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typedef uint16_t Elf32_Half;
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typedef uint32_t Elf32_Off; // File offset
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typedef int32_t Elf32_Sword;
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typedef uint32_t Elf32_Word;
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typedef uint64_t Elf64_Addr;
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typedef uint64_t Elf64_Off;
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typedef int32_t Elf64_Shalf;
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typedef int32_t Elf64_Sword;
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typedef uint32_t Elf64_Word;
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typedef int64_t Elf64_Sxword;
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typedef uint64_t Elf64_Xword;
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typedef uint32_t Elf64_Half;
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typedef uint16_t Elf64_Quarter;
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// Object file magic string.
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static const char ElfMagic[] = { 0x7f, 'E', 'L', 'F', '\0' };
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// e_ident size and indices.
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enum {
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EI_MAG0 = 0, // File identification index.
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EI_MAG1 = 1, // File identification index.
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EI_MAG2 = 2, // File identification index.
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EI_MAG3 = 3, // File identification index.
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EI_CLASS = 4, // File class.
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EI_DATA = 5, // Data encoding.
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EI_VERSION = 6, // File version.
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EI_OSABI = 7, // OS/ABI identification.
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EI_ABIVERSION = 8, // ABI version.
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EI_PAD = 9, // Start of padding bytes.
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EI_NIDENT = 16 // Number of bytes in e_ident.
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};
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struct Elf32_Ehdr {
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unsigned char e_ident[EI_NIDENT]; // ELF Identification bytes
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Elf32_Half e_type; // Type of file (see ET_* below)
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Elf32_Half e_machine; // Required architecture for this file (see EM_*)
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Elf32_Word e_version; // Must be equal to 1
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Elf32_Addr e_entry; // Address to jump to in order to start program
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Elf32_Off e_phoff; // Program header table's file offset, in bytes
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Elf32_Off e_shoff; // Section header table's file offset, in bytes
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Elf32_Word e_flags; // Processor-specific flags
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Elf32_Half e_ehsize; // Size of ELF header, in bytes
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Elf32_Half e_phentsize; // Size of an entry in the program header table
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Elf32_Half e_phnum; // Number of entries in the program header table
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Elf32_Half e_shentsize; // Size of an entry in the section header table
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Elf32_Half e_shnum; // Number of entries in the section header table
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Elf32_Half e_shstrndx; // Sect hdr table index of sect name string table
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bool checkMagic() const {
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return (memcmp(e_ident, ElfMagic, strlen(ElfMagic))) == 0;
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}
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unsigned char getFileClass() const { return e_ident[EI_CLASS]; }
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unsigned char getDataEncoding() const { return e_ident[EI_DATA]; }
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};
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// 64-bit ELF header. Fields are the same as for ELF32, but with different
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// types (see above).
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struct Elf64_Ehdr {
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unsigned char e_ident[EI_NIDENT];
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Elf64_Quarter e_type;
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Elf64_Quarter e_machine;
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Elf64_Half e_version;
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Elf64_Addr e_entry;
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Elf64_Off e_phoff;
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Elf64_Off e_shoff;
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Elf64_Half e_flags;
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Elf64_Quarter e_ehsize;
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Elf64_Quarter e_phentsize;
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Elf64_Quarter e_phnum;
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Elf64_Quarter e_shentsize;
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Elf64_Quarter e_shnum;
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Elf64_Quarter e_shstrndx;
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bool checkMagic() const {
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return (memcmp(e_ident, ElfMagic, strlen(ElfMagic))) == 0;
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}
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unsigned char getFileClass() const { return e_ident[EI_CLASS]; }
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unsigned char getDataEncoding() const { return e_ident[EI_DATA]; }
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};
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// File types
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enum {
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ET_NONE = 0, // No file type
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ET_REL = 1, // Relocatable file
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ET_EXEC = 2, // Executable file
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ET_DYN = 3, // Shared object file
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ET_CORE = 4, // Core file
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ET_LOPROC = 0xff00, // Beginning of processor-specific codes
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ET_HIPROC = 0xffff // Processor-specific
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};
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// Versioning
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enum {
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EV_NONE = 0,
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EV_CURRENT = 1
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};
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// Machine architectures
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enum {
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EM_NONE = 0, // No machine
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EM_M32 = 1, // AT&T WE 32100
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EM_SPARC = 2, // SPARC
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EM_386 = 3, // Intel 386
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EM_68K = 4, // Motorola 68000
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EM_88K = 5, // Motorola 88000
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EM_486 = 6, // Intel 486 (deprecated)
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EM_860 = 7, // Intel 80860
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EM_MIPS = 8, // MIPS R3000
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EM_PPC = 20, // PowerPC
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EM_PPC64 = 21, // PowerPC64
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EM_ARM = 40, // ARM
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EM_ALPHA = 41, // DEC Alpha
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EM_SPARCV9 = 43, // SPARC V9
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EM_X86_64 = 62, // AMD64
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EM_MBLAZE = 47787 // Xilinx MicroBlaze
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};
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// Object file classes.
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enum {
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ELFCLASSNONE = 0,
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ELFCLASS32 = 1, // 32-bit object file
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ELFCLASS64 = 2 // 64-bit object file
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};
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// Object file byte orderings.
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enum {
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ELFDATANONE = 0, // Invalid data encoding.
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ELFDATA2LSB = 1, // Little-endian object file
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ELFDATA2MSB = 2 // Big-endian object file
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};
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// OS ABI identification.
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enum {
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ELFOSABI_NONE = 0, // UNIX System V ABI
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ELFOSABI_HPUX = 1, // HP-UX operating system
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ELFOSABI_NETBSD = 2, // NetBSD
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ELFOSABI_LINUX = 3, // GNU/Linux
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ELFOSABI_HURD = 4, // GNU/Hurd
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ELFOSABI_SOLARIS = 6, // Solaris
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ELFOSABI_AIX = 7, // AIX
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ELFOSABI_IRIX = 8, // IRIX
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ELFOSABI_FREEBSD = 9, // FreeBSD
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ELFOSABI_TRU64 = 10, // TRU64 UNIX
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ELFOSABI_MODESTO = 11, // Novell Modesto
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ELFOSABI_OPENBSD = 12, // OpenBSD
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ELFOSABI_OPENVMS = 13, // OpenVMS
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ELFOSABI_NSK = 14, // Hewlett-Packard Non-Stop Kernel
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ELFOSABI_AROS = 15, // AROS
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ELFOSABI_FENIXOS = 16, // FenixOS
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ELFOSABI_C6000_ELFABI = 64, // Bare-metal TMS320C6000
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ELFOSABI_C6000_LINUX = 65, // Linux TMS320C6000
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ELFOSABI_ARM = 97, // ARM
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ELFOSABI_STANDALONE = 255 // Standalone (embedded) application
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};
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// X86_64 relocations.
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enum {
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R_X86_64_NONE = 0,
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R_X86_64_64 = 1,
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R_X86_64_PC32 = 2,
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R_X86_64_GOT32 = 3,
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R_X86_64_PLT32 = 4,
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R_X86_64_COPY = 5,
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R_X86_64_GLOB_DAT = 6,
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R_X86_64_JUMP_SLOT = 7,
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R_X86_64_RELATIVE = 8,
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R_X86_64_GOTPCREL = 9,
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R_X86_64_32 = 10,
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R_X86_64_32S = 11,
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R_X86_64_16 = 12,
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R_X86_64_PC16 = 13,
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R_X86_64_8 = 14,
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R_X86_64_PC8 = 15,
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R_X86_64_DTPMOD64 = 16,
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R_X86_64_DTPOFF64 = 17,
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R_X86_64_TPOFF64 = 18,
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R_X86_64_TLSGD = 19,
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R_X86_64_TLSLD = 20,
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R_X86_64_DTPOFF32 = 21,
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R_X86_64_GOTTPOFF = 22,
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R_X86_64_TPOFF32 = 23,
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R_X86_64_PC64 = 24,
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R_X86_64_GOTOFF64 = 25,
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R_X86_64_GOTPC32 = 26,
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R_X86_64_SIZE32 = 32,
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R_X86_64_SIZE64 = 33,
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R_X86_64_GOTPC32_TLSDESC = 34,
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R_X86_64_TLSDESC_CALL = 35,
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R_X86_64_TLSDESC = 36
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};
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// i386 relocations.
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// TODO: this is just a subset
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enum {
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R_386_NONE = 0,
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R_386_32 = 1,
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R_386_PC32 = 2,
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R_386_GOT32 = 3,
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R_386_PLT32 = 4,
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R_386_COPY = 5,
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R_386_GLOB_DAT = 6,
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R_386_JUMP_SLOT = 7,
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R_386_RELATIVE = 8,
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R_386_GOTOFF = 9,
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R_386_GOTPC = 10,
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R_386_32PLT = 11,
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R_386_TLS_TPOFF = 14,
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R_386_TLS_IE = 15,
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R_386_TLS_GOTIE = 16,
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R_386_TLS_LE = 17,
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R_386_TLS_GD = 18,
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R_386_TLS_LDM = 19,
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R_386_16 = 20,
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R_386_PC16 = 21,
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R_386_8 = 22,
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R_386_PC8 = 23,
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R_386_TLS_GD_32 = 24,
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R_386_TLS_GD_PUSH = 25,
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R_386_TLS_GD_CALL = 26,
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R_386_TLS_GD_POP = 27,
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R_386_TLS_LDM_32 = 28,
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R_386_TLS_LDM_PUSH = 29,
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R_386_TLS_LDM_CALL = 30,
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R_386_TLS_LDM_POP = 31,
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R_386_TLS_LDO_32 = 32,
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R_386_TLS_IE_32 = 33,
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R_386_TLS_LE_32 = 34,
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R_386_TLS_DTPMOD32 = 35,
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R_386_TLS_DTPOFF32 = 36,
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R_386_TLS_TPOFF32 = 37,
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R_386_TLS_GOTDESC = 39,
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R_386_TLS_DESC_CALL = 40,
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R_386_TLS_DESC = 41,
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R_386_IRELATIVE = 42,
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R_386_NUM = 43
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};
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// MBlaze relocations.
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enum {
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R_MICROBLAZE_NONE = 0,
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R_MICROBLAZE_32 = 1,
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R_MICROBLAZE_32_PCREL = 2,
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R_MICROBLAZE_64_PCREL = 3,
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R_MICROBLAZE_32_PCREL_LO = 4,
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R_MICROBLAZE_64 = 5,
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R_MICROBLAZE_32_LO = 6,
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R_MICROBLAZE_SRO32 = 7,
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R_MICROBLAZE_SRW32 = 8,
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R_MICROBLAZE_64_NONE = 9,
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R_MICROBLAZE_32_SYM_OP_SYM = 10,
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R_MICROBLAZE_GNU_VTINHERIT = 11,
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R_MICROBLAZE_GNU_VTENTRY = 12,
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R_MICROBLAZE_GOTPC_64 = 13,
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R_MICROBLAZE_GOT_64 = 14,
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R_MICROBLAZE_PLT_64 = 15,
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R_MICROBLAZE_REL = 16,
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R_MICROBLAZE_JUMP_SLOT = 17,
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R_MICROBLAZE_GLOB_DAT = 18,
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R_MICROBLAZE_GOTOFF_64 = 19,
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R_MICROBLAZE_GOTOFF_32 = 20,
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R_MICROBLAZE_COPY = 21
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};
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enum {
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R_PPC_NONE = 0, /* No relocation. */
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R_PPC_ADDR32 = 1,
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R_PPC_ADDR24 = 2,
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R_PPC_ADDR16 = 3,
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R_PPC_ADDR16_LO = 4,
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R_PPC_ADDR16_HI = 5,
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R_PPC_ADDR16_HA = 6,
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R_PPC_ADDR14 = 7,
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R_PPC_ADDR14_BRTAKEN = 8,
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R_PPC_ADDR14_BRNTAKEN = 9,
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R_PPC_REL24 = 10,
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R_PPC_REL14 = 11,
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R_PPC_REL14_BRTAKEN = 12,
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R_PPC_REL14_BRNTAKEN = 13,
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R_PPC_REL32 = 26
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};
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// ARM Specific e_flags
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enum { EF_ARM_EABIMASK = 0xFF000000U };
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// ELF Relocation types for ARM
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// Meets 2.08 ABI Specs.
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enum {
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R_ARM_NONE = 0x00,
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R_ARM_PC24 = 0x01,
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R_ARM_ABS32 = 0x02,
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R_ARM_REL32 = 0x03,
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R_ARM_LDR_PC_G0 = 0x04,
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R_ARM_ABS16 = 0x05,
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R_ARM_ABS12 = 0x06,
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R_ARM_THM_ABS5 = 0x07,
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R_ARM_ABS8 = 0x08,
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R_ARM_SBREL32 = 0x09,
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R_ARM_THM_CALL = 0x0a,
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R_ARM_THM_PC8 = 0x0b,
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R_ARM_BREL_ADJ = 0x0c,
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R_ARM_TLS_DESC = 0x0d,
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R_ARM_THM_SWI8 = 0x0e,
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R_ARM_XPC25 = 0x0f,
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R_ARM_THM_XPC22 = 0x10,
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R_ARM_TLS_DTPMOD32 = 0x11,
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R_ARM_TLS_DTPOFF32 = 0x12,
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R_ARM_TLS_TPOFF32 = 0x13,
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R_ARM_COPY = 0x14,
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R_ARM_GLOB_DAT = 0x15,
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R_ARM_JUMP_SLOT = 0x16,
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R_ARM_RELATIVE = 0x17,
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R_ARM_GOTOFF32 = 0x18,
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R_ARM_BASE_PREL = 0x19,
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R_ARM_GOT_BREL = 0x1a,
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R_ARM_PLT32 = 0x1b,
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R_ARM_CALL = 0x1c,
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R_ARM_JUMP24 = 0x1d,
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R_ARM_THM_JUMP24 = 0x1e,
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R_ARM_BASE_ABS = 0x1f,
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R_ARM_ALU_PCREL_7_0 = 0x20,
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R_ARM_ALU_PCREL_15_8 = 0x21,
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R_ARM_ALU_PCREL_23_15 = 0x22,
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R_ARM_LDR_SBREL_11_0_NC = 0x23,
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R_ARM_ALU_SBREL_19_12_NC = 0x24,
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R_ARM_ALU_SBREL_27_20_CK = 0x25,
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R_ARM_TARGET1 = 0x26,
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R_ARM_SBREL31 = 0x27,
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R_ARM_V4BX = 0x28,
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R_ARM_TARGET2 = 0x29,
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R_ARM_PREL31 = 0x2a,
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R_ARM_MOVW_ABS_NC = 0x2b,
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R_ARM_MOVT_ABS = 0x2c,
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R_ARM_MOVW_PREL_NC = 0x2d,
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R_ARM_MOVT_PREL = 0x2e,
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R_ARM_THM_MOVW_ABS_NC = 0x2f,
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R_ARM_THM_MOVT_ABS = 0x30,
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R_ARM_THM_MOVW_PREL_NC = 0x31,
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R_ARM_THM_MOVT_PREL = 0x32,
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R_ARM_THM_JUMP19 = 0x33,
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R_ARM_THM_JUMP6 = 0x34,
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R_ARM_THM_ALU_PREL_11_0 = 0x35,
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R_ARM_THM_PC12 = 0x36,
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R_ARM_ABS32_NOI = 0x37,
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R_ARM_REL32_NOI = 0x38,
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R_ARM_ALU_PC_G0_NC = 0x39,
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R_ARM_ALU_PC_G0 = 0x3a,
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R_ARM_ALU_PC_G1_NC = 0x3b,
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R_ARM_ALU_PC_G1 = 0x3c,
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R_ARM_ALU_PC_G2 = 0x3d,
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R_ARM_LDR_PC_G1 = 0x3e,
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R_ARM_LDR_PC_G2 = 0x3f,
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R_ARM_LDRS_PC_G0 = 0x40,
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R_ARM_LDRS_PC_G1 = 0x41,
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R_ARM_LDRS_PC_G2 = 0x42,
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R_ARM_LDC_PC_G0 = 0x43,
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R_ARM_LDC_PC_G1 = 0x44,
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R_ARM_LDC_PC_G2 = 0x45,
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R_ARM_ALU_SB_G0_NC = 0x46,
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R_ARM_ALU_SB_G0 = 0x47,
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R_ARM_ALU_SB_G1_NC = 0x48,
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R_ARM_ALU_SB_G1 = 0x49,
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R_ARM_ALU_SB_G2 = 0x4a,
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R_ARM_LDR_SB_G0 = 0x4b,
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R_ARM_LDR_SB_G1 = 0x4c,
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R_ARM_LDR_SB_G2 = 0x4d,
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R_ARM_LDRS_SB_G0 = 0x4e,
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R_ARM_LDRS_SB_G1 = 0x4f,
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R_ARM_LDRS_SB_G2 = 0x50,
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R_ARM_LDC_SB_G0 = 0x51,
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R_ARM_LDC_SB_G1 = 0x52,
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R_ARM_LDC_SB_G2 = 0x53,
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R_ARM_MOVW_BREL_NC = 0x54,
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R_ARM_MOVT_BREL = 0x55,
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R_ARM_MOVW_BREL = 0x56,
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R_ARM_THM_MOVW_BREL_NC = 0x57,
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R_ARM_THM_MOVT_BREL = 0x58,
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R_ARM_THM_MOVW_BREL = 0x59,
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R_ARM_TLS_GOTDESC = 0x5a,
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R_ARM_TLS_CALL = 0x5b,
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R_ARM_TLS_DESCSEQ = 0x5c,
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R_ARM_THM_TLS_CALL = 0x5d,
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R_ARM_PLT32_ABS = 0x5e,
|
|
R_ARM_GOT_ABS = 0x5f,
|
|
R_ARM_GOT_PREL = 0x60,
|
|
R_ARM_GOT_BREL12 = 0x61,
|
|
R_ARM_GOTOFF12 = 0x62,
|
|
R_ARM_GOTRELAX = 0x63,
|
|
R_ARM_GNU_VTENTRY = 0x64,
|
|
R_ARM_GNU_VTINHERIT = 0x65,
|
|
R_ARM_THM_JUMP11 = 0x66,
|
|
R_ARM_THM_JUMP8 = 0x67,
|
|
R_ARM_TLS_GD32 = 0x68,
|
|
R_ARM_TLS_LDM32 = 0x69,
|
|
R_ARM_TLS_LDO32 = 0x6a,
|
|
R_ARM_TLS_IE32 = 0x6b,
|
|
R_ARM_TLS_LE32 = 0x6c,
|
|
R_ARM_TLS_LDO12 = 0x6d,
|
|
R_ARM_TLS_LE12 = 0x6e,
|
|
R_ARM_TLS_IE12GP = 0x6f,
|
|
R_ARM_PRIVATE_0 = 0x70,
|
|
R_ARM_PRIVATE_1 = 0x71,
|
|
R_ARM_PRIVATE_2 = 0x72,
|
|
R_ARM_PRIVATE_3 = 0x73,
|
|
R_ARM_PRIVATE_4 = 0x74,
|
|
R_ARM_PRIVATE_5 = 0x75,
|
|
R_ARM_PRIVATE_6 = 0x76,
|
|
R_ARM_PRIVATE_7 = 0x77,
|
|
R_ARM_PRIVATE_8 = 0x78,
|
|
R_ARM_PRIVATE_9 = 0x79,
|
|
R_ARM_PRIVATE_10 = 0x7a,
|
|
R_ARM_PRIVATE_11 = 0x7b,
|
|
R_ARM_PRIVATE_12 = 0x7c,
|
|
R_ARM_PRIVATE_13 = 0x7d,
|
|
R_ARM_PRIVATE_14 = 0x7e,
|
|
R_ARM_PRIVATE_15 = 0x7f,
|
|
R_ARM_ME_TOO = 0x80,
|
|
R_ARM_THM_TLS_DESCSEQ16 = 0x81,
|
|
R_ARM_THM_TLS_DESCSEQ32 = 0x82
|
|
};
|
|
|
|
|
|
|
|
// 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_Half sh_name;
|
|
Elf64_Half sh_type;
|
|
Elf64_Xword sh_flags;
|
|
Elf64_Addr sh_addr;
|
|
Elf64_Off sh_offset;
|
|
Elf64_Xword sh_size;
|
|
Elf64_Half sh_link;
|
|
Elf64_Half 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_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 {
|
|
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_HIOS = 0x6fffffff, // Highest operating system-specific type.
|
|
SHT_LOPROC = 0x70000000, // Lowest processor architecture-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_X86_64_UNWIND = 0x70000001, // Unwind information
|
|
|
|
SHT_HIPROC = 0x7fffffff, // Highest processor architecture-specific type.
|
|
SHT_LOUSER = 0x80000000, // Lowest type reserved for applications.
|
|
SHT_HIUSER = 0xffffffff // Highest type reserved for applications.
|
|
};
|
|
|
|
// Section flags.
|
|
enum {
|
|
// 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,
|
|
|
|
// Start of target-specific flags.
|
|
|
|
/// XCORE_SHF_CP_SECTION - 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 = 0x800U,
|
|
|
|
/// XCORE_SHF_DP_SECTION - 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 = 0x1000U,
|
|
|
|
// Bits indicating processor-specific flags.
|
|
SHF_MASKPROC = 0xf0000000
|
|
};
|
|
|
|
// Section Group Flags
|
|
enum {
|
|
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 table 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_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_LOPROC = 13, // Lowest processor-specific symbol type
|
|
STT_HIPROC = 15 // Highest processor-specific symbol type
|
|
};
|
|
|
|
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
|
|
};
|
|
|
|
// 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_Xword getSymbol() const { return (r_info >> 32); }
|
|
unsigned char getType() const {
|
|
return (unsigned char) (r_info & 0xffffffffL);
|
|
}
|
|
void setSymbol(Elf32_Word s) { setSymbolAndType(s, getType()); }
|
|
void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
|
|
void setSymbolAndType(Elf64_Xword s, unsigned char t) {
|
|
r_info = (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_Xword getSymbol() const { return (r_info >> 32); }
|
|
unsigned char getType() const {
|
|
return (unsigned char) (r_info & 0xffffffffL);
|
|
}
|
|
void setSymbol(Elf64_Xword s) { setSymbolAndType(s, getType()); }
|
|
void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
|
|
void setSymbolAndType(Elf64_Xword s, unsigned char t) {
|
|
r_info = (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 address 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_LOPROC = 0x70000000, // Lowest processor-specific program hdr entry type.
|
|
PT_HIPROC = 0x7fffffff // Highest processor-specific program hdr entry type.
|
|
};
|
|
|
|
// Segment flag bits.
|
|
enum {
|
|
PF_X = 1, // Execute
|
|
PF_W = 2, // Write
|
|
PF_R = 4, // Read
|
|
PF_MASKPROC = 0xf0000000 // Unspecified
|
|
};
|
|
|
|
// 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_LOOS = 0x60000000, // Start of environment specific tags.
|
|
DT_HIOS = 0x6FFFFFFF, // End of environment specific tags.
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DT_LOPROC = 0x70000000, // Start of processor specific tags.
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DT_HIPROC = 0x7FFFFFFF // End of processor specific tags.
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};
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} // end namespace ELF
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} // end namespace llvm
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#endif
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