elf.h

Go to the documentation of this file.

 
#pragma once
 
#include "process/process.h"
#include "stdint.h"
 
 
#define PT_NULL 0
#define PT_LOAD 1
#define PT_DYNAMIC 2
#define PT_INTERP 3
#define PT_NOTE 4
#define PT_SHLIB 5
#define PT_PHDR 6
#define PT_EH_FRAME 0x6474E550
#define PT_GNU_STACK 0x6474E551
#define PT_GNU_RELRO 0x6474E552
#define PT_LOPROC 0x70000000
#define PT_HIPROC 0x7FFFFFFF
 
 
#define EI_NIDENT 16
 
typedef struct elf_header {
    uint8_t ident[EI_NIDENT];
    uint16_t type;
    uint16_t machine;
    uint32_t version;
    uint32_t entry;
    uint32_t phoff;
    uint32_t shoff;
    uint32_t flags;
    uint16_t ehsize;
    uint16_t phentsize;
    uint16_t phnum;
    uint16_t shentsize;
    uint16_t shnum;
    uint16_t shstrndx;
} elf_header_t;
 
typedef struct elf_program_header {
    uint32_t type;
    uint32_t offset;
    uint32_t vaddr;
    uint32_t paddr;
    uint32_t filesz;
    uint32_t memsz;
    uint32_t flags;
    uint32_t align;
} elf_program_header_t;
 
typedef struct elf_section_header {
    uint32_t name;
    uint32_t type;
    uint32_t flags;
    uint32_t addr;
    uint32_t offset;
    uint32_t size;
    uint32_t link;
    uint32_t info;
    uint32_t addralign;
    uint32_t entsize;
} elf_section_header_t;
 
typedef struct elf_symbol {
    uint32_t name;
    uint32_t value;
    uint32_t size;
    uint8_t info;
    uint8_t other;
    uint16_t ndx;
} elf_symbol_t;
 
typedef struct elf_rel_t {
    uint32_t r_offset;
    uint32_t r_info;
} elf_rel_t;
 
typedef struct elf_rela_t {
    uint32_t r_offset;
    uint32_t r_info;
    int32_t r_addend;
} elf_rela_t;
 
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  
};
 
#define ELFMAG0 0x7F 
#define ELFMAG1 'E' 
#define ELFMAG2 'L' 
#define ELFMAG3 'F' 
 
#define ELFDATA2LSB 1 
#define ELFCLASS32  1 
 
typedef enum Elf_Type {
    ET_NONE = 0, 
    ET_REL  = 1, 
    ET_EXEC = 2  
} Elf_Type;
 
#define EM_386     3 
#define EV_CURRENT 1 
 
typedef enum ShT_Types {
    SHT_NULL     = 0, 
    SHT_PROGBITS = 1, 
    SHT_SYMTAB   = 2, 
    SHT_STRTAB   = 3, 
    SHT_RELA     = 4, 
    SHT_NOBITS   = 8, 
    SHT_REL      = 9, 
} ShT_Types;
 
enum ShT_Attributes {
    SHF_WRITE = 0x01, 
    SHF_ALLOC = 0x02  
};
 
#define ELF32_ST_BIND(INFO) ((INFO) >> 4)
#define ELF32_ST_TYPE(INFO) ((INFO)&0x0F)
 
enum StT_Bindings {
    STB_LOCAL  = 0, 
    STB_GLOBAL = 1, 
    STB_WEAK   = 2  
};
 
enum StT_Types {
    STT_NOTYPE = 0, 
    STT_OBJECT = 1, 
    STT_FUNC   = 2  
};
 
int elf_load_file(task_struct *task, vfs_file_t *file, uint32_t *entry);
 
int elf_check_file_type(vfs_file_t *file, Elf_Type type);
 
int elf_check_file_header(elf_header_t *hdr);
 
int elf_check_magic_number(elf_header_t *hdr);
 
const char *elf_type_to_string(int type);
 
const char *elf_section_header_type_to_string(int type);
 
const char *elf_symbol_type_to_string(int type);
 
const char *elf_symbol_bind_to_string(int bind);