core/loader/elf32.h

   1 /*
   2  * Copyright (c) 2006, Swedish Institute of Computer Science
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the Institute nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#)$Id: elf32.h,v 1.1 2006/12/01 15:12:27 bg- Exp $
  30  */
  31
  32 /* @(#)$Id: elf32.h,v 1.1 2006/12/01 15:12:27 bg- Exp $ */
  33
  34 #ifndef ELF32_H
  35 #define ELF32_H
  36
  37 /*
  38  * ELF definitions common to all 32-bit architectures.
  39  */
  40
  41 #define EI_NIDENT 16
  42
  43 typedef unsigned long  elf32_word;
  44 typedef   signed long  elf32_sword;
  45 typedef unsigned short elf32_half;
  46 typedef unsigned long  elf32_off;
  47 typedef unsigned long  elf32_addr;
  48
  49 struct elf32_ehdr {
  50   unsigned char e_ident[EI_NIDENT];    /* ident bytes */
  51   elf32_half e_type;                   /* file type */
  52   elf32_half e_machine;                /* target machine */
  53   elf32_word e_version;                /* file version */
  54   elf32_addr e_entry;                  /* start address */
  55   elf32_off e_phoff;                   /* phdr file offset */
  56   elf32_off e_shoff;                   /* shdr file offset */
  57   elf32_word e_flags;                  /* file flags */
  58   elf32_half e_ehsize;                 /* sizeof ehdr */
  59   elf32_half e_phentsize;              /* sizeof phdr */
  60   elf32_half e_phnum;                  /* number phdrs */
  61   elf32_half e_shentsize;              /* sizeof shdr */
  62   elf32_half e_shnum;                  /* number shdrs */
  63   elf32_half e_shstrndx;               /* shdr string index */
  64 };
  65
  66 /* Values for e_type. */
  67 #define ET_NONE         0       /* Unknown type. */
  68 #define ET_REL          1       /* Relocatable. */
  69 #define ET_EXEC         2       /* Executable. */
  70 #define ET_DYN          3       /* Shared object. */
  71 #define ET_CORE         4       /* Core file. */
  72
  73 struct elf32_shdr {
  74   elf32_word sh_name;           /* section name */
  75   elf32_word sh_type;           /* SHT_... */
  76   elf32_word sh_flags;          /* SHF_... */
  77   elf32_addr sh_addr;           /* virtual address */
  78   elf32_off sh_offset;          /* file offset */
  79   elf32_word sh_size;           /* section size */
  80   elf32_word sh_link;           /* misc info */
  81   elf32_word sh_info;           /* misc info */
  82   elf32_word sh_addralign;      /* memory alignment */
  83   elf32_word sh_entsize;        /* entry size if table */
  84 };
  85
  86 /* sh_type */
  87 #define SHT_NULL        0               /* inactive */
  88 #define SHT_PROGBITS    1               /* program defined information */
  89 #define SHT_SYMTAB      2               /* symbol table section */
  90 #define SHT_STRTAB      3               /* string table section */
  91 #define SHT_RELA        4               /* relocation section with addends*/
  92 #define SHT_HASH        5               /* symbol hash table section */
  93 #define SHT_DYNAMIC     6               /* dynamic section */
  94 #define SHT_NOTE        7               /* note section */
  95 #define SHT_NOBITS      8               /* no space section */
  96 #define SHT_REL         9               /* relation section without addends */
  97 #define SHT_SHLIB       10              /* reserved - purpose unknown */
  98 #define SHT_DYNSYM      11              /* dynamic symbol table section */
  99 #define SHT_LOPROC      0x70000000      /* reserved range for processor */
 100 #define SHT_HIPROC      0x7fffffff      /* specific section header types */
 101 #define SHT_LOUSER      0x80000000      /* reserved range for application */
 102 #define SHT_HIUSER      0xffffffff      /* specific indexes */
 103
 104 struct elf32_rel {
 105   elf32_addr      r_offset;       /* Location to be relocated. */
 106   elf32_word      r_info;         /* Relocation type and symbol index. */
 107 };
 108
 109 struct elf32_rela {
 110   elf32_addr      r_offset;       /* Location to be relocated. */
 111   elf32_word      r_info;         /* Relocation type and symbol index. */
 112   elf32_sword     r_addend;       /* Addend. */
 113 };
 114
 115 struct elf32_sym {
 116   elf32_word      st_name;        /* String table index of name. */
 117   elf32_addr      st_value;       /* Symbol value. */
 118   elf32_word      st_size;        /* Size of associated object. */
 119   unsigned char   st_info;        /* Type and binding information. */
 120   unsigned char   st_other;       /* Reserved (not used). */
 121   elf32_half      st_shndx;       /* Section index of symbol. */
 122 };
 123
 124 #define ELF32_R_SYM(info)       ((info) >> 8)
 125 #define ELF32_R_TYPE(info)      ((unsigned char)(info))
 126
 127 #define ELF_MAGIC_HEADER         "\177ELF\001\001\001"
 128 #define ELF_MAGIC_HEADER_SIZE    7
 129
 130 #endif /* ELF32_H */