sys/sys/elf64.h

   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/elf64.h,v 1.9 1999/08/28 00:51:42 peter Exp $
  27  * $DragonFly: src/sys/sys/elf64.h,v 1.9 2008/08/01 23:11:15 dillon Exp $
  28  */
  29
  30 #ifndef _SYS_ELF64_H_
  31 #define _SYS_ELF64_H_
  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 64-bit architectures.
  42  */
  43
  44 typedef uint64_t        Elf64_Addr;
  45 typedef uint16_t        Elf64_Half;
  46 typedef uint64_t        Elf64_Off;
  47 typedef int32_t         Elf64_Sword;
  48 typedef int64_t         Elf64_Sxword;
  49 typedef uint32_t        Elf64_Word;
  50 typedef uint64_t        Elf64_Lword;
  51 typedef uint64_t        Elf64_Xword;
  52
  53 /*
  54  * Types of dynamic symbol hash table bucket and chain elements.
  55  *
  56  * This is inconsistent among 64 bit architectures, so a machine dependent
  57  * typedef is required.
  58  */
  59
  60 typedef Elf64_Word      Elf64_Hashelt;
  61
  62 /* Non-standard class-dependent datatype used for abstraction. */
  63 typedef Elf64_Xword     Elf64_Size;
  64 typedef Elf64_Sxword    Elf64_Ssize;
  65
  66 /*
  67  * ELF header.
  68  */
  69
  70 typedef struct {
  71         unsigned char   e_ident[EI_NIDENT];     /* File identification. */
  72         Elf64_Half      e_type;         /* File type. */
  73         Elf64_Half      e_machine;      /* Machine architecture. */
  74         Elf64_Word      e_version;      /* ELF format version. */
  75         Elf64_Addr      e_entry;        /* Entry point. */
  76         Elf64_Off       e_phoff;        /* Program header file offset. */
  77         Elf64_Off       e_shoff;        /* Section header file offset. */
  78         Elf64_Word      e_flags;        /* Architecture-specific flags. */
  79         Elf64_Half      e_ehsize;       /* Size of ELF header in bytes. */
  80         Elf64_Half      e_phentsize;    /* Size of program header entry. */
  81         Elf64_Half      e_phnum;        /* Number of program header entries. */
  82         Elf64_Half      e_shentsize;    /* Size of section header entry. */
  83         Elf64_Half      e_shnum;        /* Number of section header entries. */
  84         Elf64_Half      e_shstrndx;     /* Section name strings section. */
  85 } Elf64_Ehdr;
  86
  87 /*
  88  * Section header.
  89  */
  90
  91 typedef struct {
  92         Elf64_Word      sh_name;        /* Section name (index into the
  93                                            section header string table). */
  94         Elf64_Word      sh_type;        /* Section type. */
  95         Elf64_Xword     sh_flags;       /* Section flags. */
  96         Elf64_Addr      sh_addr;        /* Address in memory image. */
  97         Elf64_Off       sh_offset;      /* Offset in file. */
  98         Elf64_Xword     sh_size;        /* Size in bytes. */
  99         Elf64_Word      sh_link;        /* Index of a related section. */
 100         Elf64_Word      sh_info;        /* Depends on section type. */
 101         Elf64_Xword     sh_addralign;   /* Alignment in bytes. */
 102         Elf64_Xword     sh_entsize;     /* Size of each entry in section. */
 103 } Elf64_Shdr;
 104
 105 /*
 106  * Program header.
 107  */
 108
 109 typedef struct {
 110         Elf64_Word      p_type;         /* Entry type. */
 111         Elf64_Word      p_flags;        /* Access permission flags. */
 112         Elf64_Off       p_offset;       /* File offset of contents. */
 113         Elf64_Addr      p_vaddr;        /* Virtual address in memory image. */
 114         Elf64_Addr      p_paddr;        /* Physical address (not used). */
 115         Elf64_Xword     p_filesz;       /* Size of contents in file. */
 116         Elf64_Xword     p_memsz;        /* Size of contents in memory. */
 117         Elf64_Xword     p_align;        /* Alignment in memory and file. */
 118 } Elf64_Phdr;
 119
 120 /*
 121  * Dynamic structure.  The ".dynamic" section contains an array of them.
 122  */
 123
 124 typedef struct {
 125         Elf64_Sxword    d_tag;          /* Entry type. */
 126         union {
 127                 Elf64_Xword     d_val;  /* Integer value. */
 128                 Elf64_Addr      d_ptr;  /* Address value. */
 129         } d_un;
 130 } Elf64_Dyn;
 131
 132 /*
 133  * Relocation entries.
 134  */
 135
 136 /* Relocations that don't need an addend field. */
 137 typedef struct {
 138         Elf64_Addr      r_offset;       /* Location to be relocated. */
 139         Elf64_Xword     r_info;         /* Relocation type and symbol index. */
 140 } Elf64_Rel;
 141
 142 /* Relocations that need an addend field. */
 143 typedef struct {
 144         Elf64_Addr      r_offset;       /* Location to be relocated. */
 145         Elf64_Xword     r_info;         /* Relocation type and symbol index. */
 146         Elf64_Sxword    r_addend;       /* Addend. */
 147 } Elf64_Rela;
 148
 149 /* Macros for accessing the fields of r_info. */
 150 #define ELF64_R_SYM(info)       ((info) >> 32)
 151 #define ELF64_R_TYPE(info)      ((info) & 0xffffffffL)
 152
 153 /* Macro for constructing r_info from field values. */
 154 #define ELF64_R_INFO(sym, type) (((sym) << 32) + ((type) & 0xffffffffL))
 155
 156 #define        ELF64_R_TYPE_DATA(info)  (((Elf64_Xword)(info)<<32)>>40)
 157 #define        ELF64_R_TYPE_ID(info)    (((Elf64_Xword)(info)<<56)>>56)
 158 #define        ELF64_R_TYPE_INFO(data, type)   \
 159                 (((Elf64_Xword)(data)<<8)+(Elf64_Xword)(type))
 160
 161 /*
 162  * Note entry header
 163  */
 164 typedef Elf_Note Elf64_Nhdr;
 165
 166 /*
 167  * Move entry
 168  */
 169 typedef struct {
 170         Elf64_Lword     m_value;        /* symbol value */
 171         Elf64_Xword     m_info;         /* size + index */
 172         Elf64_Xword     m_poffset;      /* symbol offset */
 173         Elf64_Half      m_repeat;       /* repeat count */
 174         Elf64_Half      m_stride;       /* stride info */
 175 } Elf64_Move;
 176
 177 #define ELF64_M_SYM(info)       ((info)>>8)
 178 #define ELF64_M_SIZE(info)      ((unsigned char)(info))
 179 #define ELF64_M_INFO(sym, size) (((sym)<<8)+(unsigned char)(size))
 180
 181 /*
 182  * Hardware/Software capabilities entry
 183  */
 184 typedef struct {
 185         Elf64_Xword     c_tag;          /* how to interpret value */
 186         union {
 187                 Elf64_Xword     c_val;
 188                 Elf64_Addr      c_ptr;
 189         } c_un;
 190 } Elf64_Cap;
 191
 192 /*
 193  * Symbol table entries.
 194  */
 195
 196 typedef struct {
 197         Elf64_Word      st_name;        /* String table index of name. */
 198         unsigned char   st_info;        /* Type and binding information. */
 199         unsigned char   st_other;       /* Reserved (not used). */
 200         Elf64_Half      st_shndx;       /* Section index of symbol. */
 201         Elf64_Addr      st_value;       /* Symbol value. */
 202         Elf64_Xword     st_size;        /* Size of associated object. */
 203 } Elf64_Sym;
 204
 205 /* Macros for accessing the fields of st_info. */
 206 #define ELF64_ST_BIND(info)             ((info) >> 4)
 207 #define ELF64_ST_TYPE(info)             ((info) & 0xf)
 208
 209 /* Macro for constructing st_info from field values. */
 210 #define ELF64_ST_INFO(bind, type)       (((bind) << 4) + ((type) & 0xf))
 211
 212 /* Macro for accessing the fields of st_other. */
 213 #define ELF64_ST_VISIBILITY(oth)        ((oth) & 0x3)
 214
 215 /* Structures used by Sun & GNU-style symbol versioning. */
 216 typedef struct {
 217         Elf64_Half      vd_version;
 218         Elf64_Half      vd_flags;
 219         Elf64_Half      vd_ndx;
 220         Elf64_Half      vd_cnt;
 221         Elf64_Word      vd_hash;
 222         Elf64_Word      vd_aux;
 223         Elf64_Word      vd_next;
 224 } Elf64_Verdef;
 225
 226 typedef struct {
 227         Elf64_Word      vda_name;
 228         Elf64_Word      vda_next;
 229 } Elf64_Verdaux;
 230
 231 typedef struct {
 232         Elf64_Half      vn_version;
 233         Elf64_Half      vn_cnt;
 234         Elf64_Word      vn_file;
 235         Elf64_Word      vn_aux;
 236         Elf64_Word      vn_next;
 237 } Elf64_Verneed;
 238
 239 typedef struct {
 240         Elf64_Word      vna_hash;
 241         Elf64_Half      vna_flags;
 242         Elf64_Half      vna_other;
 243         Elf64_Word      vna_name;
 244         Elf64_Word      vna_next;
 245 } Elf64_Vernaux;
 246
 247 typedef Elf64_Half Elf64_Versym;
 248
 249 typedef struct {
 250         Elf64_Half      si_boundto;     /* direct bindings - symbol bound to */
 251         Elf64_Half      si_flags;       /* per symbol flags */
 252 } Elf64_Syminfo;
 253
 254 #endif /* !_SYS_ELF64_H_ */