147 lines
3.5 KiB
C
147 lines
3.5 KiB
C
#ifndef _ELF_H_
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#define _ELF_H_
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// elf documentation: http://www.sco.com/developers/devspecs/gabi41.pdf
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// ELF HEADER
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// identification indexes
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#define EI_MAG0 0 // file identification
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#define EI_MAG1 1 // file identification
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#define EI_MAG2 2 // file identification
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#define EI_MAG3 3 // file identification
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#define EI_CLASS 4 // file class
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#define EI_DATA 5 // data encoding
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#define EI_VERSION 6 // file version
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#define EI_PAD 7 // start of padding bytes
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#define EI_NIDENT 16
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// magic numbers
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#define ELFMAG0 0x7f
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#define ELFMAG1 'E'
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#define ELFMAG2 'L'
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#define ELFMAG3 'F'
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// file class
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#define ELFCLASSNONE 0 // invalid class
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#define ELFCLASS32 1 // 32-bit objects
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#define ELFCLASS64 2 // 64-bit objects
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// data encoding
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#define ELFDATANONE 0 // invalid data encoding
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#define ELFDATA2LSB 1 // little endian
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#define ELFDATA2MSB 2 // big endian
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// object file type
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#define ET_NONE 0 // no file type
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#define ET_ELF 1 // Relocatable file
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#define ET_EXEC 2 // Executable file
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#define ET_DYN 3 // Shared object file
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#define ET_CORE 4 // Core file
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#define ET_LOPROC 0xff00 // Processor-specfic
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#define ET_HIPROC 0xffff // Processor-specfic
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// machine architecture
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#define EM_NONE 0 // No machine
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#define EM_M32 1 // AT&T WE 32100
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#define EM_SPARC 2 // SPARC
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#define EM_386 3 // Intel 80386
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#define EM_68K 4 // Motorola 68000
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#define EM_88K 5 // Motorola 88000
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#define EM_860 7 // Intel 80860
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#define EM_MIPS 8 // MIPS RS3000
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// object file version
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#define EV_NONE 0 // Invalid version
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#define EV_CURRENT 1 // Current version
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typedef unsigned int Elf32_Addr;
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typedef unsigned short Elf32_Half;
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typedef unsigned int Elf32_Off;
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typedef unsigned int Elf32_Sword;
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typedef unsigned int Elf32_Word;
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typedef struct {
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unsigned char e_ident[EI_NIDENT]; // elf identification
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Elf32_Half e_type; // object file type
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Elf32_Half e_machine; // required architecture
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Elf32_Word e_version; // object file version
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Elf32_Addr e_entry; // first transfer control virtual address
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Elf32_Off e_phoff; // program header table offset
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Elf32_Off e_shoff; // section header table offset
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Elf32_Word e_flags; // processor-specific flags
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Elf32_Half e_ehsize; // elf header size
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Elf32_Half e_phentsize;
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Elf32_Half e_phnum;
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Elf32_Half e_shentsize;
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Elf32_Half e_shnum;
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Elf32_Half e_shstrndx;
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} Elf32_Ehdr;
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// SECTION HEADER
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// section type
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#define SHT_NULL 0
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#define SHT_PROGBITS 1
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#define SHT_SYMTAB 2
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#define SHT_STRTAB 3
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#define SHT_RELA 4
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#define SHT_HASH 5
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#define SHT_DYNAMIC 6
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#define SHT_NOTE 7
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#define SHT_NOBITS 8
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#define SHT_REL 9
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#define SHT_SHLIB 10
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#define SHT_DYNSYM 11
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#define SHT_LOPROC 0x70000000
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#define SHT_HIPROP 0x7fffffff
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#define SHT_LOUSER 0x80000000
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#define SHT_HIUSER 0xffffffff
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// section attribute flags
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#define SHF_WRITE 0x01
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#define SHF_ALLOC 0x02
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#define SHF_EXECINSTR 0x04
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#define SHF_MASKPROC 0xf0000000
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typedef struct {
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Elf32_Word sh_name;
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Elf32_Word sh_type;
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Elf32_Word sh_flags;
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Elf32_Addr sh_addr;
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Elf32_Off sh_offset;
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Elf32_Word sh_size;
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Elf32_Word sh_link;
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Elf32_Word sh_info;
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Elf32_Word sh_addralign;
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Elf32_Word sh_entsize;
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} Elf32_Shdr;
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// PROGRAM HEADER
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// segment type
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#define PT_NULL 0
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#define PT_LOAD 1
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#define PT_DYNAMIC 2
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#define PT_INTERP 3
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#define PT_NOTE 4
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#define PT_SHLIB 5
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#define PT_PHDR 6
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#define LOPROC 0x70000000
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#define HIPROC 0x7fffffff
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typedef struct {
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Elf32_Word p_type;
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Elf32_Off p_offset;
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Elf32_Addr p_vaddr;
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Elf32_Addr p_paddr;
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Elf32_Word p_filesz;
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Elf32_Word p_memsz;
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Elf32_Word p_flags;
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Elf32_Word p_align;
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} Elf32_Phdr;
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int elf32_validate(Elf32_Ehdr *hdr);
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#endif // _ELF_H_
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