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 * $FreeBSD: src/sys/sys/elf32.h,v 1.7 1999/08/28 00:51:41 peter Exp $ 27 * $DragonFly: src/sys/sys/elf32.h,v 1.4 2006/05/20 02:42:13 dillon Exp $ 28 */ 29 30 #ifndef _SYS_ELF32_H_ 31 #define _SYS_ELF32_H_ 1 32 33 #ifndef _SYS_TYPES_H_ 34 #include <sys/types.h> 35 #endif 36 #ifndef _SYS_ELF_COMMON_H_ 37 #include <sys/elf_common.h> 38 #endif 39 40 /* 41 * ELF definitions common to all 32-bit architectures. 42 */ 43 44 typedef u_int32_t Elf32_Addr; 45 typedef u_int16_t Elf32_Half; 46 typedef u_int32_t Elf32_Off; 47 typedef int32_t Elf32_Sword; 48 typedef u_int32_t Elf32_Word; 49 typedef u_int32_t Elf32_Size; 50 typedef Elf32_Off Elf32_Hashelt; 51 52 /* 53 * ELF header. 54 */ 55 56 typedef struct { 57 unsigned char e_ident[EI_NIDENT]; /* File identification. */ 58 Elf32_Half e_type; /* File type. */ 59 Elf32_Half e_machine; /* Machine architecture. */ 60 Elf32_Word e_version; /* ELF format version. */ 61 Elf32_Addr e_entry; /* Entry point. */ 62 Elf32_Off e_phoff; /* Program header file offset. */ 63 Elf32_Off e_shoff; /* Section header file offset. */ 64 Elf32_Word e_flags; /* Architecture-specific flags. */ 65 Elf32_Half e_ehsize; /* Size of ELF header in bytes. */ 66 Elf32_Half e_phentsize; /* Size of program header entry. */ 67 Elf32_Half e_phnum; /* Number of program header entries. */ 68 Elf32_Half e_shentsize; /* Size of section header entry. */ 69 Elf32_Half e_shnum; /* Number of section header entries. */ 70 Elf32_Half e_shstrndx; /* Section name strings section. */ 71 } Elf32_Ehdr; 72 73 /* 74 * Section header. 75 */ 76 77 typedef struct { 78 Elf32_Word sh_name; /* Section name (index into the 79 section header string table). */ 80 Elf32_Word sh_type; /* Section type. */ 81 Elf32_Word sh_flags; /* Section flags. */ 82 Elf32_Addr sh_addr; /* Address in memory image. */ 83 Elf32_Off sh_offset; /* Offset in file. */ 84 Elf32_Size sh_size; /* Size in bytes. */ 85 Elf32_Word sh_link; /* Index of a related section. */ 86 Elf32_Word sh_info; /* Depends on section type. */ 87 Elf32_Size sh_addralign; /* Alignment in bytes. */ 88 Elf32_Size sh_entsize; /* Size of each entry in section. */ 89 } Elf32_Shdr; 90 91 /* 92 * Program header. 93 */ 94 95 typedef struct { 96 Elf32_Word p_type; /* Entry type. */ 97 Elf32_Off p_offset; /* File offset of contents. */ 98 Elf32_Addr p_vaddr; /* Virtual address in memory image. */ 99 Elf32_Addr p_paddr; /* Physical address (not used). */ 100 Elf32_Size p_filesz; /* Size of contents in file. */ 101 Elf32_Size p_memsz; /* Size of contents in memory. */ 102 Elf32_Word p_flags; /* Access permission flags. */ 103 Elf32_Size p_align; /* Alignment in memory and file. */ 104 } Elf32_Phdr; 105 106 /* 107 * Dynamic structure. The ".dynamic" section contains an array of them. 108 */ 109 110 typedef struct { 111 Elf32_Sword d_tag; /* Entry type. */ 112 union { 113 Elf32_Size d_val; /* Integer value. */ 114 Elf32_Addr d_ptr; /* Address value. */ 115 } d_un; 116 } Elf32_Dyn; 117 118 /* 119 * Relocation entries. 120 */ 121 122 /* Relocations that don't need an addend field. */ 123 typedef struct { 124 Elf32_Addr r_offset; /* Location to be relocated. */ 125 Elf32_Word r_info; /* Relocation type and symbol index. */ 126 } Elf32_Rel; 127 128 /* Relocations that need an addend field. */ 129 typedef struct { 130 Elf32_Addr r_offset; /* Location to be relocated. */ 131 Elf32_Word r_info; /* Relocation type and symbol index. */ 132 Elf32_Sword r_addend; /* Addend. */ 133 } Elf32_Rela; 134 135 /* Macros for accessing the fields of r_info. */ 136 #define ELF32_R_SYM(info) ((info) >> 8) 137 #define ELF32_R_TYPE(info) ((unsigned char)(info)) 138 139 /* Macro for constructing r_info from field values. */ 140 #define ELF32_R_INFO(sym, type) (((sym) << 8) + (unsigned char)(type)) 141 142 /* 143 * Symbol table entries. 144 */ 145 146 typedef struct { 147 Elf32_Word st_name; /* String table index of name. */ 148 Elf32_Addr st_value; /* Symbol value. */ 149 Elf32_Size st_size; /* Size of associated object. */ 150 unsigned char st_info; /* Type and binding information. */ 151 unsigned char st_other; /* Reserved (not used). */ 152 Elf32_Half st_shndx; /* Section index of symbol. */ 153 } Elf32_Sym; 154 155 /* Macros for accessing the fields of st_info. */ 156 #define ELF32_ST_BIND(info) ((info) >> 4) 157 #define ELF32_ST_TYPE(info) ((info) & 0xf) 158 159 /* Macro for constructing st_info from field values. */ 160 #define ELF32_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf)) 161 162 #endif /* !_SYS_ELF32_H_ */ 163