elf32.h revision 46656
1/*- 2 * Copyright (c) 1996-1998 John D. Polstra. 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 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $Id: elf32.h,v 1.5 1998/09/14 20:30:13 jdp Exp $ 27 */ 28 29#ifndef _SYS_ELF32_H_ 30#define _SYS_ELF32_H_ 1 31 32#include <sys/elf_common.h> 33 34/* 35 * ELF definitions common to all 32-bit architectures. 36 */ 37 38typedef u_int32_t Elf32_Addr; 39typedef u_int16_t Elf32_Half; 40typedef u_int32_t Elf32_Off; 41typedef int32_t Elf32_Sword; 42typedef u_int32_t Elf32_Word; 43typedef u_int32_t Elf32_Size; 44 45/* 46 * ELF header. 47 */ 48 49typedef struct { 50 unsigned char e_ident[EI_NIDENT]; /* File identification. */ 51 Elf32_Half e_type; /* File type. */ 52 Elf32_Half e_machine; /* Machine architecture. */ 53 Elf32_Word e_version; /* ELF format version. */ 54 Elf32_Addr e_entry; /* Entry point. */ 55 Elf32_Off e_phoff; /* Program header file offset. */ 56 Elf32_Off e_shoff; /* Section header file offset. */ 57 Elf32_Word e_flags; /* Architecture-specific flags. */ 58 Elf32_Half e_ehsize; /* Size of ELF header in bytes. */ 59 Elf32_Half e_phentsize; /* Size of program header entry. */ 60 Elf32_Half e_phnum; /* Number of program header entries. */ 61 Elf32_Half e_shentsize; /* Size of section header entry. */ 62 Elf32_Half e_shnum; /* Number of section header entries. */ 63 Elf32_Half e_shstrndx; /* Section name strings section. */ 64} Elf32_Ehdr; 65 66/* 67 * Section header. 68 */ 69 70typedef struct { 71 Elf32_Word sh_name; /* Section name (index into the 72 section header string table). */ 73 Elf32_Word sh_type; /* Section type. */ 74 Elf32_Word sh_flags; /* Section flags. */ 75 Elf32_Addr sh_addr; /* Address in memory image. */ 76 Elf32_Off sh_offset; /* Offset in file. */ 77 Elf32_Size sh_size; /* Size in bytes. */ 78 Elf32_Word sh_link; /* Index of a related section. */ 79 Elf32_Word sh_info; /* Depends on section type. */ 80 Elf32_Size sh_addralign; /* Alignment in bytes. */ 81 Elf32_Size sh_entsize; /* Size of each entry in section. */ 82} Elf32_Shdr; 83 84/* 85 * Program header. 86 */ 87 88typedef struct { 89 Elf32_Word p_type; /* Entry type. */ 90 Elf32_Off p_offset; /* File offset of contents. */ 91 Elf32_Addr p_vaddr; /* Virtual address in memory image. */ 92 Elf32_Addr p_paddr; /* Physical address (not used). */ 93 Elf32_Size p_filesz; /* Size of contents in file. */ 94 Elf32_Size p_memsz; /* Size of contents in memory. */ 95 Elf32_Word p_flags; /* Access permission flags. */ 96 Elf32_Size p_align; /* Alignment in memory and file. */ 97} Elf32_Phdr; 98 99/* 100 * Dynamic structure. The ".dynamic" section contains an array of them. 101 */ 102 103typedef struct { 104 Elf32_Sword d_tag; /* Entry type. */ 105 union { 106 Elf32_Size d_val; /* Integer value. */ 107 Elf32_Addr d_ptr; /* Address value. */ 108 } d_un; 109} Elf32_Dyn; 110 111/* 112 * Relocation entries. 113 */ 114 115/* Relocations that don't need an addend field. */ 116typedef struct { 117 Elf32_Addr r_offset; /* Location to be relocated. */ 118 Elf32_Word r_info; /* Relocation type and symbol index. */ 119} Elf32_Rel; 120 121/* Relocations that need an addend field. */ 122typedef struct { 123 Elf32_Addr r_offset; /* Location to be relocated. */ 124 Elf32_Word r_info; /* Relocation type and symbol index. */ 125 Elf32_Sword r_addend; /* Addend. */ 126} Elf32_Rela; 127 128/* Macros for accessing the fields of r_info. */ 129#define ELF32_R_SYM(info) ((info) >> 8) 130#define ELF32_R_TYPE(info) ((unsigned char)(info)) 131 132/* Macro for constructing r_info from field values. */ 133#define ELF32_R_INFO(sym, type) (((sym) << 8) + (unsigned char)(type)) 134 135/* 136 * Symbol table entries. 137 */ 138 139typedef struct { 140 Elf32_Word st_name; /* String table index of name. */ 141 Elf32_Addr st_value; /* Symbol value. */ 142 Elf32_Size st_size; /* Size of associated object. */ 143 unsigned char st_info; /* Type and binding information. */ 144 unsigned char st_other; /* Reserved (not used). */ 145 Elf32_Half st_shndx; /* Section index of symbol. */ 146} Elf32_Sym; 147 148/* Macros for accessing the fields of st_info. */ 149#define ELF32_ST_BIND(info) ((info) >> 4) 150#define ELF32_ST_TYPE(info) ((info) & 0xf) 151 152/* Macro for constructing st_info from field values. */ 153#define ELF32_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf)) 154 155#endif /* !_SYS_ELF32_H_ */ 156