mango/tools/e64patch/elf.h

#ifndef USERBOOT_ELF_H_
#define USERBOOT_ELF_H_

#include <stdint.h>
#include <stddef.h>

#define ELF_MAG0 0x7f
#define ELF_MAG1 'E'
#define ELF_MAG2 'L'
#define ELF_MAG3 'F'
#define ELF_NIDENT 16

#define SHT_NONE 0
#define SHT_PROGBITS 1
#define SHT_SYMTAB 2
#define SHT_STRTAB 3
#define SHT_RELA 4
#define SHT_DYNAMIC 6
#define SHT_NOBITS 8
#define SHT_REL 9
#define SHT_DYNSYM 11

/** Little endian. */
#define ELFDATA2LSB (1)

/** 64-bit. */
#define ELFCLASS64 (2)

#define EM_386 (3)
#define EM_X86_64 (62)

/** ELF current version. */
#define EV_CURRENT (1)

/** Dynamic section tags. */
#define DT_NULL 0
#define DT_NEEDED 1
#define DT_PLTRELSZ 2
#define DT_PLTGOT 3
#define DT_HASH 4
#define DT_STRTAB 5
#define DT_SYMTAB 6
#define DT_RELA 7
#define DT_RELASZ 8
#define DT_RELAENT 9
#define DT_STRSZ 10
#define DT_SYMENT 11
#define DT_INIT 12
#define DT_FINI 13
#define DT_REL 17
#define DT_RELSZ 18
#define DT_RELENT 19
#define DT_PLTREL 20
#define DT_JMPREL 23
#define DT_GNU_HASH 0x6ffffef5
#define DT_AUXILIARY 0x7ffffffd

#define R_386_32 1
#define R_386_PC32 2
#define R_386_GOT32 3
#define R_386_PLT32 4
#define R_386_GOTOFF 9
#define R_386_GOTPC 10
#define R_386_GOT32X 43

#define R_X86_64_64 1
#define R_X86_64_PC32 2
#define R_X86_64_GOT32 3
#define R_X86_64_PLT32 4
#define R_X86_64_COPY 5
#define R_X86_64_GLOB_DAT 6
#define R_X86_64_JUMP_SLOT 7
#define R_X86_64_RELATIVE 8
#define R_X86_64_GOTPCREL 9
#define R_X86_64_32 10

#define STT_NOTYPE 0
#define STT_OBJECT 1
#define STT_FUNC 2
#define STT_SECTION 3
#define STT_FILE 4
#define STT_LOPROC 13
#define STT_HIPROC 15

/* Section flags */
#define SHF_WRITE 0x1
#define SHF_ALLOC 0x2
#define SHF_EXECINSTR 0x4

#define SHN_UNDEF 0

#define ELF64_R_SYM(i) ((i) >> 32)
#define ELF64_R_TYPE(i) ((elf_word_t)(i))
#define ELF64_ST_BIND(i) ((i) >> 4)
#define ELF64_ST_TYPE(i) ((i)&0xf)

#define STB_LOCAL 0
#define STB_GLOBAL 1
#define STB_WEAK 2
#define STB_NUM 3

typedef uint64_t elf_addr_t;
typedef uint64_t elf_off_t;
typedef uint16_t elf_half_t;
typedef uint32_t elf_word_t;
typedef int32_t elf_sword_t;
typedef uint64_t elf_xword_t;
typedef int64_t elf_sxword_t;

/**
 * ELF file header.
 */
typedef struct {
    uint8_t e_ident[ELF_NIDENT];
    elf_half_t e_type;
    elf_half_t e_machine;
    elf_word_t e_version;
    elf_addr_t e_entry;
    elf_off_t e_phoff;
    elf_off_t e_shoff;
    elf_word_t e_flags;
    elf_half_t e_ehsize;
    elf_half_t e_phentsize;
    elf_half_t e_phnum;
    elf_half_t e_shentsize;
    elf_half_t e_shnum;
    elf_half_t e_shstrndx;
} elf_ehdr_t;

/**
 * ELF section header.
 */
typedef struct {
    elf_word_t sh_name;
    elf_word_t sh_type;
    elf_xword_t sh_flags;
    elf_addr_t sh_addr;
    elf_off_t sh_offset;
    elf_xword_t sh_size;
    elf_word_t sh_link;
    elf_word_t sh_info;
    elf_xword_t sh_addralign;
    elf_xword_t sh_entsize;
} elf_shdr_t;

/**
 * ELF symbol.
 */
typedef struct {
    elf_word_t st_name;
    unsigned char st_info;
    unsigned char st_other;
    elf_half_t st_shndx;
    elf_addr_t st_value;
    elf_xword_t st_size;
} elf_sym_t;

/**
 * ELF program header.
 */
typedef struct {
    elf_word_t p_type;
    elf_word_t p_flags;
    elf_off_t p_offset;
    elf_addr_t p_vaddr;
    elf_addr_t p_paddr;
    elf_xword_t p_filesz;
    elf_xword_t p_memsz;
    elf_xword_t p_align;
} elf_phdr_t;

/**
 * Extended ELF relocation information.
 */
typedef struct {
    elf_addr_t r_offset;
    elf_xword_t r_info;
    elf_sxword_t r_addend;
} elf_rela_t;

/**
 * Dynamic section entries
 */
typedef struct {
    elf_sxword_t d_tag;
    union {
        elf_xword_t d_val;
        elf_addr_t d_ptr;
    } d_un;
} elf_dyn_t;

/**
 * Section header types.
 */
enum elf_stype {
    ST_NONE = 0,
    ST_PROGBITS = 1,
    ST_SYMTAB = 2,
    ST_STRTAB = 3,
    ST_NOBITS = 8,
    ST_REL = 9
};

/**
 * Program header types.
 */
enum elf_ptype {
    PT_NULL = 0,
    PT_LOAD = 1,
    PT_DYNAMIC = 2,
    PT_INTERP = 3,
    PT_NOTE = 4,
    PT_SHLIB = 5,
    PT_PHDR = 6,
    PT_TLS = 7,
};

#define PF_X 0x1
#define PF_W 0x2
#define PF_R 0x4

#define PT_LOPROC 0x70000000
#define PT_HIPROC 0x7FFFFFFF

/**
 * ELF identification byte locations.
 */
enum elf_ident {
    EI_MAG0 = 0,
    EI_MAG1 = 1,
    EI_MAG2 = 2,
    EI_MAG3 = 3,
    EI_CLASS = 4,
    EI_DATA = 5,
    EI_VERSION = 6,
    EI_OSABI = 7,
    EI_ABIVERSION = 8,
    EI_PAD = 9
};

enum elf_type {
    ET_NONE = 0,
    ET_REL = 1,
    ET_EXEC = 2,
    ET_DYN = 3,
};

#define AT_NULL 0
#define AT_IGNORE 1
#define AT_EXECFD 2
#define AT_PHDR 3
#define AT_PHENT 4
#define AT_PHNUM 5
#define AT_PAGESZ 6
#define AT_BASE 7
#define AT_FLAGS 8
#define AT_ENTRY 9
#define AT_NOTELF 10
#define AT_UID 11
#define AT_EUID 12
#define AT_GID 13
#define AT_EGID 14
#define AT_CLKTCK 17
#define AT_PLATFORM 15
#define AT_HWCAP 16
#define AT_FPUCW 18
#define AT_DCACHEBSIZE 19
#define AT_ICACHEBSIZE 20
#define AT_UCACHEBSIZE 21
#define AT_IGNOREPPC 22
#define AT_SECURE 23
#define AT_BASE_PLATFORM 24
#define AT_RANDOM 25
#define AT_HWCAP2 26
#define AT_EXECFN 31
#define AT_SYSINFO 32
#define AT_SYSINFO_EHDR 33
#define AT_L1I_CACHESHAPE 34
#define AT_L1D_CACHESHAPE 35
#define AT_L2_CACHESHAPE 36
#define AT_L3_CACHESHAPE 37
#define AT_ENTRY_COUNT 38

#endif