157 lines
2.5 KiB
C
157 lines
2.5 KiB
C
#pragma once
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#include <errno.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <stdbool.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* ELF format according to
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* https://en.wikipedia.org/wiki/Executable_and_Linkable_Format
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*/
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#define EI_MAG_SIZE 4
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#define PT_NULL 0x00000000
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#define PT_LOAD 0x00000001
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#define PT_DYNAMIC 0x00000002
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#define PT_INTERP 0x00000003
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#define PT_NOTE 0x00000004
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#define PT_SHLIB 0x00000005
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#define PT_PHDR 0x00000006
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#define PT_LOOS 0x60000000
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#define PT_HIOS 0x6fffffff
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#define PT_LOPROC 0x70000000
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#define PT_HIRPOC 0x7fffffff
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#define PF_ALL 0x7
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#define PF_X 0x1
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#define PF_W 0x2
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#define PF_R 0x4
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typedef uint64_t u64;
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typedef uint32_t u32;
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typedef uint16_t u16;
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typedef uint8_t u8;
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typedef int64_t s64;
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typedef int32_t s32;
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typedef int16_t s16;
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typedef int8_t s8;
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/*
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* This part of ELF header is endianness-independent.
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*/
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struct elf_indent {
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u8 ei_magic[4];
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u8 ei_class;
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u8 ei_data;
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u8 ei_version;
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u8 ei_osabi;
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u8 ei_abiversion;
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u8 ei_pad[7];
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};
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/*
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* ELF header format. One should check the `e_indent` to decide the endianness.
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*/
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struct elf_header {
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struct elf_indent e_indent;
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u16 e_type;
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u16 e_machine;
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u32 e_version;
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u64 e_entry;
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u64 e_phoff;
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u64 e_shoff;
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u32 e_flags;
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u16 e_ehsize;
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u16 e_phentsize;
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u16 e_phnum;
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u16 e_shentsize;
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u16 e_shnum;
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u16 e_shstrndx;
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};
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/*
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* 32-Bit of the elf_header. Check the `e_indent` first to decide.
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*/
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struct elf_header_32 {
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struct elf_indent e_indent;
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u16 e_type;
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u16 e_machine;
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u32 e_version;
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u32 e_entry;
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u32 e_phoff;
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u32 e_shoff;
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u32 e_flags;
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u16 e_ehsize;
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u16 e_phentsize;
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u16 e_phnum;
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u16 e_shentsize;
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u16 e_shnum;
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u16 e_shstrndx;
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};
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struct elf_program_header {
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u32 p_type;
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u32 p_flags;
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u64 p_offset;
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u64 p_vaddr;
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u64 p_paddr;
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u64 p_filesz;
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u64 p_memsz;
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u64 p_align;
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};
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struct elf_program_header_32 {
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u32 p_type;
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u32 p_offset;
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u32 p_vaddr;
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u32 p_paddr;
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u32 p_filesz;
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u32 p_memsz;
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u32 p_flags;
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u32 p_align;
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};
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struct elf_section_header {
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u32 sh_name;
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u32 sh_type;
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u64 sh_flags;
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u64 sh_addr;
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u64 sh_offset;
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u64 sh_size;
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u32 sh_link;
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u32 sh_info;
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u64 sh_addralign;
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u64 sh_entsize;
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};
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struct elf_section_header_32 {
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u32 sh_name;
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u32 sh_type;
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u32 sh_flags;
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u32 sh_addr;
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u32 sh_offset;
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u32 sh_size;
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u32 sh_link;
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u32 sh_info;
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u32 sh_addralign;
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u32 sh_entsize;
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};
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struct elf_file {
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struct elf_header header;
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struct elf_program_header *p_headers;
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struct elf_section_header *s_headers;
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};
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struct elf_file *elf_parse_file(const char *code);
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void elf_free(struct elf_file *elf);
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#ifdef __cplusplus
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}
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#endif
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