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/******************************************************************************
* Copyright (c) 2004, 2011 IBM Corporation
* All rights reserved.
* This program and the accompanying materials
* are made available under the terms of the BSD License
* which accompanies this distribution, and is available at
* http://www.opensource.org/licenses/bsd-license.php
*
* Contributors:
* IBM Corporation - initial implementation
*****************************************************************************/
/*
* ELF loader library
*/
#ifndef __LIBELF_H
#define __LIBELF_H
#include <stdint.h>
/* ELF object file types */
#define ET_NONE 0 /* No file type */
#define ET_REL 1 /* Relocatable file */
#define ET_EXEC 2 /* Executable file */
#define ET_DYN 3 /* Shared object file */
#define ET_CORE 4 /* Core file */
/* ELF object endian */
#define ELFDATA2LSB 1 /* 2's complement, little endian */
#define ELFDATA2MSB 2 /* 2's complement, big endian */
/* Generic ELF header */
struct ehdr {
uint32_t ei_ident;
uint8_t ei_class;
uint8_t ei_data;
uint8_t ei_version;
uint8_t ei_pad[9];
uint16_t e_type;
uint16_t e_machine;
uint32_t e_version;
};
/* Section types (sh_type) */
#define SHT_NULL 0 /* Unused section header */
#define SHT_PROGBITS 1 /* Information defined by the program */
#define SHT_SYMTAB 2 /* Linker symbol table */
#define SHT_STRTAB 3 /* String table */
#define SHT_RELA 4 /* "Rela" type relocation entries */
#define SHT_HASH 5 /* Symbol hash table */
#define SHT_DYNAMIC 6 /* Dynamic linking tables */
#define SHT_NOTE 7 /* Note information */
#define SHT_NOBITS 8 /* Uninitialized space */
#define SHT_REL 9 /* "Rel" type relocation entries */
#define SHT_SHLIB 10 /* Reserved */
#define SHT_DYNSYM 11 /* Dynamic loader symbol table */
/* Section attributs (sh_flags) */
#define SHF_WRITE 0x1
#define SHF_ALLOC 0x2
#define SHF_EXECINSTR 0x4
/* Segment types (p_type) */
#define PT_NULL 0 /* Unused entry */
#define PT_LOAD 1 /* Loadable segment */
#define PT_DYNAMIC 2 /* Dynamic linking tables */
#define PT_INTERP 3 /* Program interpreter path name */
#define PT_NOTE 4 /* Note sections */
int elf_load_file(void *file_addr, unsigned long *entry,
int (*pre_load)(void*, long),
void (*post_load)(void*, long));
int elf_load_file_to_addr(void *file_addr, void *addr, unsigned long *entry,
int (*pre_load)(void*, long),
void (*post_load)(void*, long));
void elf_byteswap_header32(void *file_addr);
void elf_byteswap_header64(void *file_addr);
unsigned int elf_load_segments32(void *file_addr, signed long offset,
int (*pre_load)(void*, long),
void (*post_load)(void*, long));
unsigned long elf_load_segments64(void *file_addr, signed long offset,
int (*pre_load)(void*, long),
void (*post_load)(void*, long));
long elf_get_base_addr(void *file_addr);
long elf_get_base_addr32(void *file_addr);
long elf_get_base_addr64(void *file_addr);
uint32_t elf_get_eflags_32(void *file_addr);
uint32_t elf_get_eflags_64(void *file_addr);
void elf_relocate64(void *file_addr, signed long offset);
int elf_forth_claim(void *addr, long size);
long elf_get_file_size(const void *buffer, const unsigned long buffer_size);
long elf_get_file_size32(const void *buffer, const unsigned long buffer_size);
long elf_get_file_size64(const void *buffer, const unsigned long buffer_size);
#ifdef __BIG_ENDIAN__
#define elf64_to_cpu(x, ehdr) ((ehdr)->ei_data == ELFDATA2MSB ? (x) : bswap_64(x))
#define elf32_to_cpu(x, ehdr) ((ehdr)->ei_data == ELFDATA2MSB ? (x) : bswap_32(x))
#define elf16_to_cpu(x, ehdr) ((ehdr)->ei_data == ELFDATA2MSB ? (x) : bswap_16(x))
#else
#define elf64_to_cpu(x, ehdr) ((ehdr)->ei_data == ELFDATA2LSB ? (x) : bswap_64(x))
#define elf32_to_cpu(x, ehdr) ((ehdr)->ei_data == ELFDATA2LSB ? (x) : bswap_32(x))
#define elf16_to_cpu(x, ehdr) ((ehdr)->ei_data == ELFDATA2LSB ? (x) : bswap_16(x))
#endif
#endif /* __LIBELF_H */
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