mirror of
https://github.com/jart/cosmopolitan.git
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fa20edc44d
- Remove most __ASSEMBLER__ __LINKER__ ifdefs - Rename libc/intrin/bits.h to libc/serialize.h - Block pthread cancelation in fchmodat() polyfill - Remove `clang-format off` statements in third_party
161 lines
3.5 KiB
C
161 lines
3.5 KiB
C
#ifndef COSMOPOLITAN_LIBC_ELF_STRUCT_EHDR_H_
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#define COSMOPOLITAN_LIBC_ELF_STRUCT_EHDR_H_
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#include "libc/elf/scalar.h"
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/*
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* ELF header.
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*/
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typedef struct Elf64_Ehdr {
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/*
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* Leading bytes of ELF header.
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*
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* - `e_ident[0]` is always `127`
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* - `e_ident[1]` is always `'E'`
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* - `e_ident[2]` is always `'L'`
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* - `e_ident[3]` is always `'F'`
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*
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* - `e_ident[EI_CLASS]` is mandatory and should be:
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*
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* - `ELFCLASSNONE64` if it's an Elf64 image
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* - `ELFCLASSNONE32` if it's an Elf32 image
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* - Otherwise we assume it's an Elf64 image
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*
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* - `e_ident[EI_DATA]` is advisory and could be:
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*
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* - `ELFDATANONE` isn't strictly valid
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* - `ELFDATA2LSB` for little-endian
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* - `ELFDATA2MSB` for big-endian
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*
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* - `e_ident[EI_VERSION]` is advisory and should be:
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*
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* - `EV_NONE` if it's zero or unspecified
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* - `EV_CURRENT` for current ELF version (which is 1)
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*
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* - `e_ident[EI_OSABI]` is mandatory and could be:
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*
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* - `ELFOSABI_NONE` is zero
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* - `ELFOSABI_GNU` is for GNU
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* - `ELFOSABI_SYSV` used by GNU
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* - `ELFOSABI_LINUX` doesn't care
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* - `ELFOSABI_FREEBSD` does care (recommended)
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* - `ELFOSABI_NETBSD` doesn't care (see `PT_NOTE`)
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* - `ELFOSABI_OPENBSD` doesn't care (see `PT_NOTE`)
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*
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* - `e_ident[EI_ABIVERSION]` is advisory
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*
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*/
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unsigned char e_ident[16];
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/*
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* ELF image type.
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*
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* This field is mandatory and should be one of:
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*
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* - `ET_REL` for `.o` object files
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* - `ET_DYN` for `.so` files and `-pie` executables
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* - `ET_EXEC` for statically-linked executables
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*
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*/
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Elf64_Half e_type;
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/*
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* ELF machine type.
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*
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* This field is mandatory and could be one of:
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*
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* - `EM_M32` for Bellmac
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* - `EM_X86_64` for Amd64
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* - `EM_AARCH64` for Arm64
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* - `EM_PPC64` for Raptors
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* - `EM_RISCV` for Berkeley
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* - `EM_S390` for System/360
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*
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*/
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Elf64_Half e_machine;
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/*
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* ELF version.
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*
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* This field is advisory and could be:
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*
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* - `EV_NONE` if it's zero or unspecified
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* - `EV_CURRENT` for current ELF version (which is 1)
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*
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* @see `e_ident[EI_VERSION]`
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*/
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Elf64_Word e_version;
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/*
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* ELF executable entrypoint.
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*
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* Static executables should use this field to store the virtual
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* address of the _start() function. This field may be zero, for
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* unspecified.
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*/
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Elf64_Addr e_entry;
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/*
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* `Elf64_Phdr` file offset.
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*
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* This field is mandatory. Object files should set it to zero.
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*/
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Elf64_Off e_phoff;
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/*
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* `Elf64_Shdr` file offset.
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*
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* This field is advisory.
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*/
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Elf64_Off e_shoff;
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/*
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* ELF flags.
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*
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* This field is advisory.
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*/
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Elf64_Word e_flags;
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/*
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* `Elf64_Ehdr` size.
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*
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* This field is advisory and should be 64.
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*/
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Elf64_Half e_ehsize;
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/*
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* `Elf64_Phdr` element size.
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*
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* This field *is* cared about and should be set to 56. Cosmopolitan
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* permits larger values for the pleasure of it.
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*/
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Elf64_Half e_phentsize;
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/*
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* `Elf64_Phdr` array count.
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*/
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Elf64_Half e_phnum;
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/*
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* `Elf64_Shdr` element size.
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*
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* This field is advisory and should be set to 64. Cosmopolitan
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* permits larger values for the pleasure of it.
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*/
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Elf64_Half e_shentsize;
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/*
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* `Elf64_Shdr` count.
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*
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* This field is advisory.
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*/
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Elf64_Half e_shnum;
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/*
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* Section header index of section name string table.
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*/
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Elf64_Half e_shstrndx;
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} Elf64_Ehdr;
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#endif /* COSMOPOLITAN_LIBC_ELF_STRUCT_EHDR_H_ */
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