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 * $FreeBSD$ 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 38 typedef uint32_t Elf32_Addr; 39 typedef uint16_t Elf32_Half; 40 typedef uint32_t Elf32_Off; 41 typedef int32_t Elf32_Sword; 42 typedef uint32_t Elf32_Word; 43 typedef uint64_t Elf32_Lword; 44 45 typedef Elf32_Word Elf32_Hashelt; 46 47 /* Non-standard class-dependent datatype used for abstraction. */ 48 typedef Elf32_Word Elf32_Size; 49 typedef Elf32_Sword Elf32_Ssize; 50 51 /* 52 * ELF header. 53 */ 54 55 typedef struct { 56 unsigned char e_ident[EI_NIDENT]; /* File identification. */ 57 Elf32_Half e_type; /* File type. */ 58 Elf32_Half e_machine; /* Machine architecture. */ 59 Elf32_Word e_version; /* ELF format version. */ 60 Elf32_Addr e_entry; /* Entry point. */ 61 Elf32_Off e_phoff; /* Program header file offset. */ 62 Elf32_Off e_shoff; /* Section header file offset. */ 63 Elf32_Word e_flags; /* Architecture-specific flags. */ 64 Elf32_Half e_ehsize; /* Size of ELF header in bytes. */ 65 Elf32_Half e_phentsize; /* Size of program header entry. */ 66 Elf32_Half e_phnum; /* Number of program header entries. */ 67 Elf32_Half e_shentsize; /* Size of section header entry. */ 68 Elf32_Half e_shnum; /* Number of section header entries. */ 69 Elf32_Half e_shstrndx; /* Section name strings section. */ 70 } Elf32_Ehdr; 71 72 /* 73 * Shared object information, found in SHT_MIPS_LIBLIST. 74 */ 75 76 typedef struct { 77 Elf32_Word l_name; /* The name of a shared object. */ 78 Elf32_Word l_time_stamp; /* 32-bit timestamp. */ 79 Elf32_Word l_checksum; /* Checksum of visible symbols, sizes. */ 80 Elf32_Word l_version; /* Interface version string index. */ 81 Elf32_Word l_flags; /* Flags (LL_*). */ 82 } Elf32_Lib; 83 84 /* 85 * Section header. 86 */ 87 88 typedef struct { 89 Elf32_Word sh_name; /* Section name (index into the 90 section header string table). */ 91 Elf32_Word sh_type; /* Section type. */ 92 Elf32_Word sh_flags; /* Section flags. */ 93 Elf32_Addr sh_addr; /* Address in memory image. */ 94 Elf32_Off sh_offset; /* Offset in file. */ 95 Elf32_Word sh_size; /* Size in bytes. */ 96 Elf32_Word sh_link; /* Index of a related section. */ 97 Elf32_Word sh_info; /* Depends on section type. */ 98 Elf32_Word sh_addralign; /* Alignment in bytes. */ 99 Elf32_Word sh_entsize; /* Size of each entry in section. */ 100 } Elf32_Shdr; 101 102 /* 103 * Program header. 104 */ 105 106 typedef struct { 107 Elf32_Word p_type; /* Entry type. */ 108 Elf32_Off p_offset; /* File offset of contents. */ 109 Elf32_Addr p_vaddr; /* Virtual address in memory image. */ 110 Elf32_Addr p_paddr; /* Physical address (not used). */ 111 Elf32_Word p_filesz; /* Size of contents in file. */ 112 Elf32_Word p_memsz; /* Size of contents in memory. */ 113 Elf32_Word p_flags; /* Access permission flags. */ 114 Elf32_Word p_align; /* Alignment in memory and file. */ 115 } Elf32_Phdr; 116 117 /* 118 * Dynamic structure. The ".dynamic" section contains an array of them. 119 */ 120 121 typedef struct { 122 Elf32_Sword d_tag; /* Entry type. */ 123 union { 124 Elf32_Word d_val; /* Integer value. */ 125 Elf32_Addr d_ptr; /* Address value. */ 126 } d_un; 127 } Elf32_Dyn; 128 129 /* 130 * Relocation entries. 131 */ 132 133 /* Relocations that don't need an addend field. */ 134 typedef struct { 135 Elf32_Addr r_offset; /* Location to be relocated. */ 136 Elf32_Word r_info; /* Relocation type and symbol index. */ 137 } Elf32_Rel; 138 139 /* Relocations that need an addend field. */ 140 typedef struct { 141 Elf32_Addr r_offset; /* Location to be relocated. */ 142 Elf32_Word r_info; /* Relocation type and symbol index. */ 143 Elf32_Sword r_addend; /* Addend. */ 144 } Elf32_Rela; 145 146 /* Macros for accessing the fields of r_info. */ 147 #define ELF32_R_SYM(info) ((info) >> 8) 148 #define ELF32_R_TYPE(info) ((unsigned char)(info)) 149 150 /* Macro for constructing r_info from field values. */ 151 #define ELF32_R_INFO(sym, type) (((sym) << 8) + (unsigned char)(type)) 152 153 /* 154 * Note entry header 155 */ 156 typedef Elf_Note Elf32_Nhdr; 157 158 /* 159 * Move entry 160 */ 161 typedef struct { 162 Elf32_Lword m_value; /* symbol value */ 163 Elf32_Word m_info; /* size + index */ 164 Elf32_Word m_poffset; /* symbol offset */ 165 Elf32_Half m_repeat; /* repeat count */ 166 Elf32_Half m_stride; /* stride info */ 167 } Elf32_Move; 168 169 /* 170 * The macros compose and decompose values for Move.r_info 171 * 172 * sym = ELF32_M_SYM(M.m_info) 173 * size = ELF32_M_SIZE(M.m_info) 174 * M.m_info = ELF32_M_INFO(sym, size) 175 */ 176 #define ELF32_M_SYM(info) ((info)>>8) 177 #define ELF32_M_SIZE(info) ((unsigned char)(info)) 178 #define ELF32_M_INFO(sym, size) (((sym)<<8)+(unsigned char)(size)) 179 180 /* 181 * Hardware/Software capabilities entry 182 */ 183 typedef struct { 184 Elf32_Word c_tag; /* how to interpret value */ 185 union { 186 Elf32_Word c_val; 187 Elf32_Addr c_ptr; 188 } c_un; 189 } Elf32_Cap; 190 191 /* 192 * Symbol table entries. 193 */ 194 195 typedef struct { 196 Elf32_Word st_name; /* String table index of name. */ 197 Elf32_Addr st_value; /* Symbol value. */ 198 Elf32_Word st_size; /* Size of associated object. */ 199 unsigned char st_info; /* Type and binding information. */ 200 unsigned char st_other; /* Reserved (not used). */ 201 Elf32_Half st_shndx; /* Section index of symbol. */ 202 } Elf32_Sym; 203 204 /* Macros for accessing the fields of st_info. */ 205 #define ELF32_ST_BIND(info) ((info) >> 4) 206 #define ELF32_ST_TYPE(info) ((info) & 0xf) 207 208 /* Macro for constructing st_info from field values. */ 209 #define ELF32_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf)) 210 211 /* Macro for accessing the fields of st_other. */ 212 #define ELF32_ST_VISIBILITY(oth) ((oth) & 0x3) 213 214 /* Structures used by Sun & GNU symbol versioning. */ 215 typedef struct 216 { 217 Elf32_Half vd_version; 218 Elf32_Half vd_flags; 219 Elf32_Half vd_ndx; 220 Elf32_Half vd_cnt; 221 Elf32_Word vd_hash; 222 Elf32_Word vd_aux; 223 Elf32_Word vd_next; 224 } Elf32_Verdef; 225 226 typedef struct 227 { 228 Elf32_Word vda_name; 229 Elf32_Word vda_next; 230 } Elf32_Verdaux; 231 232 typedef struct 233 { 234 Elf32_Half vn_version; 235 Elf32_Half vn_cnt; 236 Elf32_Word vn_file; 237 Elf32_Word vn_aux; 238 Elf32_Word vn_next; 239 } Elf32_Verneed; 240 241 typedef struct 242 { 243 Elf32_Word vna_hash; 244 Elf32_Half vna_flags; 245 Elf32_Half vna_other; 246 Elf32_Word vna_name; 247 Elf32_Word vna_next; 248 } Elf32_Vernaux; 249 250 typedef Elf32_Half Elf32_Versym; 251 252 typedef struct { 253 Elf32_Half si_boundto; /* direct bindings - symbol bound to */ 254 Elf32_Half si_flags; /* per symbol flags */ 255 } Elf32_Syminfo; 256 257 #endif /* !_SYS_ELF32_H_ */ 258