/*
* Copyright (C) 2006 Sergey Bondari
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __ELF32_H__
#define __ELF32_H__
#include <arch/types.h>
#include <mm/as.h>
/**
* current ELF version
*/
#define EV_CURRENT 1
/**
* ELF types
*/
#define ET_NONE 0 // No type
#define ET_REL 1 // Relocatable file
#define ET_EXEC 2 // Executable
#define ET_DYN 3 // Shared object
#define ET_CORE 4 // Core
#define ET_LOPROC 0xff00 // Processor specific
#define ET_HIPROC 0xffff // Processor specific
/**
* ELF machine types
*/
#define EM_NO 0 // No machine
#define EM_M32 1 // AT&T WE 32100
#define EM_SPARC 2 // SPARC
#define EM_386 3 // i386
#define EM_68K 4 // Motorola 68000
#define EM_88K 5 // Motorola 88000
#define EM_860 7 // i80860
#define EM_MIPS 8 // MIPS RS3000
/**
* ELF identification indexes
*/
#define EI_MAG0 0
#define EI_MAG1 1
#define EI_MAG2 2
#define EI_MAG3 3
#define EI_CLASS 4 // File class
#define EI_DATA 5 // Data encoding
#define EI_VERSION 6 // File version
#define EI_PAD 7 // Start of padding bytes
#define EI_NIDENT 16 // ELF identification table size
/**
* ELF magic number
*/
#define ELFMAG0 0x7f
#define ELFMAG1 'E'
#define ELFMAG2 'L'
#define ELFMAG3 'F'
/**
* ELF file classes
*/
#define ELFCLASSNONE 0
#define ELFCLASS32 1
#define ELFCLASS64 2
/**
* ELF data encoding types
*/
#define ELFDATANONE 0
#define ELFDATA2LSB 1 // Least significant byte first (little endian)
#define ELFDATA2MSB 2 // Most signigicant byte first (Big endian)
/**
* ELF error return codes
*/
#define EE_OK 0 // No error
#define EE_INVALID 1 // invalid ELF image
#define EE_MEMORY 2 // cannot allocate address space
#define EE_INCOMPATIBLE 3 // ELF image is not compatible with current architecture
#define EE_UNSUPPORTED 4 // Non-supported ELF (e.g. dynamic ELFs)
/**
* ELF section types
*/
#define SHT_NULL 0
#define SHT_PROGBITS 1
#define SHT_SYMTAB 2
#define SHT_STRTAB 3
#define SHT_RELA 4
#define SHT_HASH 5
#define SHT_DYNAMIC 6
#define SHT_NOTE 7
#define SHT_NOBITS 8
#define SHT_REL 9
#define SHT_SHLIB 10
#define SHT_DYNSYM 11
#define SHT_LOPROC 0x70000000
#define SHT_HIPROC 0x7fffffff
#define SHT_LOUSER 0x80000000
#define SHT_HIUSER 0xffffffff
/**
* ELF section flags
*/
#define SHF_WRITE 0x1
#define SHF_ALLOC 0x2
#define SHF_EXECINSTR 0x4
#define SHF_MASKPROC 0xf0000000
/**
* Symbol binding
*/
#define STB_LOCAL 0
#define STB_GLOBAL 1
#define STB_WEAK 2
#define STB_LOPROC 13
#define STB_HIPROC 15
/**
* Symbol types
*/
#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
/**
* Program segment types
*/
#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_LOPROC 0x70000000
#define PT_HIPROC 0x7fffffff
/**
* 32-bit ELF data types
*/
typedef __u32 elf32_addr;
typedef __u16 elf32_half;
typedef __u32 elf32_off;
typedef int elf32_sword;
typedef __u32 elf32_word;
/**
* 32-bit ELF header
*/
struct elf32_header {
__u8 e_ident[EI_NIDENT];
elf32_half e_type;
elf32_half e_machine;
elf32_word e_version;
elf32_addr e_entry;
elf32_off e_phoff;
elf32_off e_shoff;
elf32_word e_flags;
elf32_half e_ehsize;
elf32_half e_phentsize;
elf32_half e_phnum;
elf32_half e_shentsize;
elf32_half e_shnum;
elf32_half e_shstrndx;
};
/*
* 32-bit ELF section header
*/
struct elf32_section_header {
elf32_word sh_name;
elf32_word sh_type;
elf32_word sh_flags;
elf32_addr sh_addr;
elf32_off sh_offset;
elf32_word sh_size;
elf32_word sh_link;
elf32_word sh_info;
elf32_word sh_addralign;
elf32_word sh_entsize;
};
/*
* 32-bit ELF symbol table entry
*/
struct elf32_symbol {
elf32_word st_name;
elf32_addr st_value;
elf32_word st_size;
__u8 st_info;
__u8 st_other;
elf32_half st_shndx;
};
/*
* 32-bit ELF program header
*/
struct elf32_program_header {
elf32_word p_type;
elf32_off p_offset;
elf32_addr pv_addr;
elf32_addr pp_addr;
elf32_word p_filesz;
elf32_word p_memsz;
elf32_word p_flags;
elf32_word p_align;
};
typedef struct elf32_header elf32_header_t;
typedef struct elf32_section_header elf32_section_header_t;
typedef struct elf32_symbol elf32_symbol_t;
typedef struct elf32_program_header elf32_program_header_t;
extern int elf32_load(__address header, as_t * as);
#endif