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211 lines
11 KiB
211 lines
11 KiB
#ifndef ELF_H_INCLUDED
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#define ELF_H_INCLUDED
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#include <stdint.h>
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/* Type for a 16-bit quantity. */
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typedef uint16_t Elf32_Half;
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typedef uint16_t Elf64_Half;
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/* Types for signed and unsigned 32-bit quantities. */
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typedef uint32_t Elf32_Word;
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typedef int32_t Elf32_Sword;
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typedef uint32_t Elf64_Word;
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typedef int32_t Elf64_Sword;
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/* Types for signed and unsigned 64-bit quantities. */
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typedef uint64_t Elf32_Xword;
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typedef int64_t Elf32_Sxword;
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typedef uint64_t Elf64_Xword;
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typedef int64_t Elf64_Sxword;
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/* Type of addresses. */
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typedef uint32_t Elf32_Addr;
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typedef uint64_t Elf64_Addr;
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/* Type of file offsets. */
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typedef uint32_t Elf32_Off;
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typedef uint64_t Elf64_Off;
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/* Type for section indices, which are 16-bit quantities. */
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typedef uint16_t Elf32_Section;
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typedef uint16_t Elf64_Section;
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/* Type for version symbol information. */
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typedef Elf32_Half Elf32_Versym;
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typedef Elf64_Half Elf64_Versym;
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/* The ELF file header. This appears at the start of every ELF file. */
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typedef struct {
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unsigned char e_ident[16]; /* Magic number and other info */
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Elf32_Half e_type; /* Object file type */
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Elf32_Half e_machine; /* Architecture */
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Elf32_Word e_version; /* Object file version */
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Elf32_Addr e_entry; /* Entry point virtual address */
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Elf32_Off e_phoff; /* Program header table (usually follows elf header directly) file offset */
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Elf32_Off e_shoff; /* Section header table (at end of file) file offset */
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Elf32_Word e_flags; /* Processor-specific flags */
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Elf32_Half e_ehsize; /* ELF header size in bytes */
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Elf32_Half e_phentsize; /* Program header table entry size */
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Elf32_Half e_phnum; /* Program header table entry count */
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Elf32_Half e_shentsize; /* Section header table entry size */
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Elf32_Half e_shnum; /* Section header table entry count */
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Elf32_Half e_shstrndx; /* Section header string table index */
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} Elf32_Ehdr;
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typedef struct {
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unsigned char e_ident[16]; /* Magic number and other info */
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Elf64_Half e_type; /* Object file type */
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Elf64_Half e_machine; /* Architecture */
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Elf64_Word e_version; /* Object file version */
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Elf64_Addr e_entry; /* Entry point virtual address */
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Elf64_Off e_phoff; /* Program header table file offset */
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Elf64_Off e_shoff; /* Section header table file offset */
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Elf64_Word e_flags; /* Processor-specific flags */
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Elf64_Half e_ehsize; /* ELF header size in bytes */
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Elf64_Half e_phentsize; /* Program header table entry size */
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Elf64_Half e_phnum; /* Program header table entry count */
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Elf64_Half e_shentsize; /* Section header table entry size */
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Elf64_Half e_shnum; /* Section header table entry count */
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Elf64_Half e_shstrndx; /* Section header string table index */
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} Elf64_Ehdr;
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/* Section header entry. The number of section entries in the file are determined by the "e_shnum" field of the ELF header.*/
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typedef struct {
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Elf32_Word sh_name; /* Section name (string tbl index) */
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Elf32_Word sh_type; /* Section type */
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Elf32_Word sh_flags; /* Section flags */
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Elf32_Addr sh_addr; /* Section virtual addr at execution */
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Elf32_Off sh_offset; /* Section file offset */
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Elf32_Word sh_size; /* Section size in bytes */
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Elf32_Word sh_link; /* Link to another section */
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Elf32_Word sh_info; /* Additional section information */
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Elf32_Word sh_addralign; /* Section alignment */
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Elf32_Word sh_entsize; /* Entry size if section holds table */
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} Elf32_Shdr;
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typedef struct {
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Elf64_Word sh_name; /* Section name (string tbl index) */
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Elf64_Word sh_type; /* Section type */
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Elf64_Xword sh_flags; /* Section flags */
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Elf64_Addr sh_addr; /* Section virtual addr at execution */
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Elf64_Off sh_offset; /* Section file offset */
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Elf64_Xword sh_size; /* Section size in bytes */
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Elf64_Word sh_link; /* Link to another section */
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Elf64_Word sh_info; /* Additional section information */
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Elf64_Xword sh_addralign; /* Section alignment */
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Elf64_Xword sh_entsize; /* Entry size if section holds table */
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} Elf64_Shdr;
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/* Legal values for sh_type (section type). */
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#define SHT_NULL 0 /* Section header table entry unused */
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#define SHT_PROGBITS 1 /* Program data */
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#define SHT_SYMTAB 2 /* Symbol table */
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#define SHT_STRTAB 3 /* String table */
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#define SHT_RELA 4 /* Relocation entries with addends */
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#define SHT_HASH 5 /* Symbol hash table */
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#define SHT_DYNAMIC 6 /* Dynamic linking information. Contains Elf32_Dyn/Elf64_Dyn entries. */
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#define SHT_NOTE 7 /* Notes */
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#define SHT_NOBITS 8 /* Program space with no data (bss) */
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#define SHT_REL 9 /* Relocation entries, no addends */
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#define SHT_SHLIB 10 /* Reserved */
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#define SHT_DYNSYM 11 /* Dynamic linker symbol table */
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#define SHT_INIT_ARRAY 14 /* Array of constructors */
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#define SHT_FINI_ARRAY 15 /* Array of destructors */
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#define SHT_PREINIT_ARRAY 16 /* Array of pre-constructors */
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#define SHT_GROUP 17 /* Section group */
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#define SHT_SYMTAB_SHNDX 18 /* Extended section indeces */
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#define SHT_NUM 19 /* Number of defined types. */
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#define SHT_LOOS 0x60000000 /* Start OS-specific. */
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#define SHT_GNU_ATTRIBUTES 0x6ffffff5 /* Object attributes. */
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#define SHT_GNU_HASH 0x6ffffff6 /* GNU-style hash table. */
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#define SHT_GNU_LIBLIST 0x6ffffff7 /* Prelink library list */
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#define SHT_CHECKSUM 0x6ffffff8 /* Checksum for DSO content. */
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#define SHT_LOSUNW 0x6ffffffa /* Sun-specific low bound. */
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#define SHT_SUNW_move 0x6ffffffa
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#define SHT_SUNW_COMDAT 0x6ffffffb
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#define SHT_SUNW_syminfo 0x6ffffffc
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#define SHT_GNU_verdef 0x6ffffffd /* Version definition section. */
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#define SHT_GNU_verneed 0x6ffffffe /* Version needs section. */
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#define SHT_GNU_versym 0x6fffffff /* Version symbol table. */
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#define SHT_HISUNW 0x6fffffff /* Sun-specific high bound. */
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#define SHT_HIOS 0x6fffffff /* End OS-specific type */
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#define SHT_LOPROC 0x70000000 /* Start of processor-specific */
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#define SHT_HIPROC 0x7fffffff /* End of processor-specific */
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#define SHT_LOUSER 0x80000000 /* Start of application-specific */
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#define SHT_HIUSER 0x8fffffff /* End of application-specific */
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/* Dynamic section entry. */
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typedef struct {
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Elf32_Sword d_tag; /* Dynamic entry type */
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union { Elf32_Word d_val; Elf32_Addr d_ptr; } d_un; /* Integer or address value */
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} Elf32_Dyn;
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typedef struct {
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Elf64_Sxword d_tag; /* Dynamic entry type */
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union { Elf64_Xword d_val; Elf64_Addr d_ptr; } d_un; /* Integer or address value */
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} Elf64_Dyn;
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/* Legal values for d_tag (dynamic entry type). */
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#define DT_NULL 0 /* Marks end of dynamic section */
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#define DT_NEEDED 1 /* Name of needed library */
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#define DT_PLTRELSZ 2 /* Size in bytes of PLT relocs */
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#define DT_PLTGOT 3 /* Processor defined value */
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#define DT_HASH 4 /* Address of symbol hash table */
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#define DT_STRTAB 5 /* Address of string table */
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#define DT_SYMTAB 6 /* Address of symbol table */
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#define DT_RELA 7 /* Address of Rela relocs */
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#define DT_RELASZ 8 /* Total size of Rela relocs */
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#define DT_RELAENT 9 /* Size of one Rela reloc */
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#define DT_STRSZ 10 /* Size of string table */
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#define DT_SYMENT 11 /* Size of one symbol table entry */
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#define DT_INIT 12 /* Address of init function */
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#define DT_FINI 13 /* Address of termination function */
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#define DT_SONAME 14 /* Name of shared object */
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#define DT_RPATH 15 /* Library search path (deprecated) */
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#define DT_SYMBOLIC 16 /* Start symbol search here */
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#define DT_REL 17 /* Address of Rel relocs */
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#define DT_RELSZ 18 /* Total size of Rel relocs */
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#define DT_RELENT 19 /* Size of one Rel reloc */
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#define DT_PLTREL 20 /* Type of reloc in PLT */
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#define DT_DEBUG 21 /* For debugging; unspecified */
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#define DT_TEXTREL 22 /* Reloc might modify .text */
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#define DT_JMPREL 23 /* Address of PLT relocs */
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#define DT_BIND_NOW 24 /* Process relocations of object */
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#define DT_INIT_ARRAY 25 /* Array with addresses of init fct */
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#define DT_FINI_ARRAY 26 /* Array with addresses of fini fct */
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#define DT_INIT_ARRAYSZ 27 /* Size in bytes of DT_INIT_ARRAY */
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#define DT_FINI_ARRAYSZ 28 /* Size in bytes of DT_FINI_ARRAY */
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#define DT_RUNPATH 29 /* Library search path */
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#define DT_FLAGS 30 /* Flags for the object being loaded */
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#define DT_ENCODING 32 /* Start of encoded range */
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#define DT_PREINIT_ARRAY 32 /* Array with addresses of preinit fct*/
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#define DT_PREINIT_ARRAYSZ 33 /* size in bytes of DT_PREINIT_ARRAY */
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#define DT_NUM 34 /* Number used */
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#define DT_LOOS 0x6000000d /* Start of OS-specific */
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#define DT_HIOS 0x6ffff000 /* End of OS-specific */
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#define DT_VERDEF 0x6ffffffc
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#define DT_VERDEFNUM 0x6ffffffd
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#define DT_LOPROC 0x70000000 /* Start of processor-specific */
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#define DT_HIPROC 0x7fffffff /* End of processor-specific */
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/* Symbol table entry. */
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typedef struct {
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Elf32_Word st_name; /* Symbol name (string tbl index) */
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Elf32_Addr st_value; /* Symbol value */
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Elf32_Word st_size; /* Symbol size */
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unsigned char st_info; /* Symbol type and binding */
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unsigned char st_other; /* Symbol visibility */
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Elf32_Section st_shndx; /* Section index */
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} Elf32_Sym;
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typedef struct {
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Elf64_Word st_name; /* Symbol name (string tbl index) */
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unsigned char st_info; /* Symbol type and binding */
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unsigned char st_other; /* Symbol visibility */
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Elf64_Section st_shndx; /* Section index */
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Elf64_Addr st_value; /* Symbol value */
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Elf64_Xword st_size; /* Symbol size */
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} Elf64_Sym;
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#endif
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