elf_abi.h

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/*
 * Copyright (c) 1995, 1996, 2001, 2002
 * Erik Theisen.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 * 3. 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.
 */
 
#include <stdint.h>
 
#ifndef _ELF_ABI_H
#define _ELF_ABI_H
 
typedef uint32_t    Elf32_Addr; /* Unsigned program address */
typedef uint32_t    Elf32_Off;  /* Unsigned file offset */
typedef uint32_t    Elf32_Word; /* Unsigned large integer */
typedef uint16_t    Elf32_Half; /* Unsigned medium integer */
 
#define EI_MAG0     0       /* file ID */
#define EI_MAG1     1       /* file ID */
#define EI_MAG2     2       /* file ID */
#define EI_MAG3     3       /* file ID */
#define EI_CLASS    4       /* ELF type */
#define EI_NIDENT   16      /* Size of e_ident[] */
 
#define ELFMAG0     0x7f        /* e_ident[EI_MAG0] */
#define ELFMAG1     'E'     /* e_ident[EI_MAG1] */
#define ELFMAG2     'L'     /* e_ident[EI_MAG2] */
#define ELFMAG3     'F'     /* e_ident[EI_MAG3] */
 
#define ELFCLASSNONE 0
#define ELFCLASS32  1
#define ELFCLASS64  2
 
#define IS_ELF(ehdr) ((ehdr).e_ident[EI_MAG0] == ELFMAG0 && \
                      (ehdr).e_ident[EI_MAG1] == ELFMAG1 && \
                      (ehdr).e_ident[EI_MAG2] == ELFMAG2 && \
                      (ehdr).e_ident[EI_MAG3] == ELFMAG3)
 
typedef struct elfhdr{
    unsigned char   e_ident[EI_NIDENT]; /* ELF Identification */
    Elf32_Half  e_type;     /* object file type */
    Elf32_Half  e_machine;  /* machine */
    Elf32_Word  e_version;  /* object file version */
    Elf32_Addr  e_entry;    /* virtual entry point */
    Elf32_Off   e_phoff;    /* program header table offset */
    Elf32_Off   e_shoff;    /* section header table offset */
    Elf32_Word  e_flags;    /* processor-specific flags */
    Elf32_Half  e_ehsize;   /* ELF header size */
    Elf32_Half  e_phentsize;    /* program header entry size */
    Elf32_Half  e_phnum;    /* number of program header entries */
    Elf32_Half  e_shentsize;    /* section header entry size */
    Elf32_Half  e_shnum;    /* number of section header entries */
    Elf32_Half  e_shstrndx; /* section header table's "section
                       header string table" entry offset */
} Elf32_Ehdr;
 
#define ET_EXEC     2       /* executable file */
 
typedef struct {
    Elf32_Word  sh_name;    /* name - index into section header
                       string table section */
    Elf32_Word  sh_type;    /* type */
    Elf32_Word  sh_flags;   /* flags */
    Elf32_Addr  sh_addr;    /* address */
    Elf32_Off   sh_offset;  /* file offset */
    Elf32_Word  sh_size;    /* section size */
    Elf32_Word  sh_link;    /* section header table index link */
    Elf32_Word  sh_info;    /* extra information */
    Elf32_Word  sh_addralign;   /* address alignment */
    Elf32_Word  sh_entsize; /* section entry size */
} Elf32_Shdr;
 
typedef struct {
    Elf32_Word p_type;
    Elf32_Word p_offset;
    Elf32_Word p_vaddr;
    Elf32_Word p_paddr;
    Elf32_Word p_filesz;
    Elf32_Word p_memsz;
    Elf32_Word p_flags;
    Elf32_Word p_align;
} Elf32_Phdr;
 
#define SHT_NULL    0
#define SHT_PROGBITS 1
#define SHT_SYMTAB  2
#define SHT_STRTAB  3       /* string table section */
#define SHT_RELA    4
#define SHT_HASH    5
#define SHT_DYNAMIC 6
#define SHT_NOTE    7
#define SHT_NOBITS  8       /* no space section */
#define SHT_REL     9
#define SHT_SHLIB   10
#define SHT_DYNSYM  11
 
#define PT_LOAD     1
#define PT_DYNAMIC  2
#define PT_NOTE     4
 
#define SHF_ALLOC   0x2     /* occupies memory */
 
#endif /* _ELF_H */