usr/src/boot/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  * $FreeBSD$
  27  */
  28
  29 #ifndef _SYS_ELF64_H_
  30 #define _SYS_ELF64_H_ 1
  31
  32 #include <sys/elf_common.h>
  33
  34 /*
  35  * ELF definitions common to all 64-bit architectures.
  36  */
  37
  38 typedef uint64_t        Elf64_Addr;
  39 typedef uint16_t        Elf64_Half;
  40 typedef uint64_t        Elf64_Off;
  41 typedef int32_t         Elf64_Sword;
  42 typedef int64_t         Elf64_Sxword;
  43 typedef uint32_t        Elf64_Word;
  44 typedef uint64_t        Elf64_Lword;
  45 typedef uint64_t        Elf64_Xword;
  46
  47 /*
  48  * Types of dynamic symbol hash table bucket and chain elements.
  49  *
  50  * This is inconsistent among 64 bit architectures, so a machine dependent
  51  * typedef is required.
  52  */
  53
  54 typedef Elf64_Word      Elf64_Hashelt;
  55
  56 /* Non-standard class-dependent datatype used for abstraction. */
  57 typedef Elf64_Xword     Elf64_Size;
  58 typedef Elf64_Sxword    Elf64_Ssize;
  59
  60 /*
  61  * ELF header.
  62  */
  63
  64 typedef struct {
  65         unsigned char   e_ident[EI_NIDENT];     /* File identification. */
  66         Elf64_Half      e_type;         /* File type. */
  67         Elf64_Half      e_machine;      /* Machine architecture. */
  68         Elf64_Word      e_version;      /* ELF format version. */
  69         Elf64_Addr      e_entry;        /* Entry point. */
  70         Elf64_Off       e_phoff;        /* Program header file offset. */
  71         Elf64_Off       e_shoff;        /* Section header file offset. */
  72         Elf64_Word      e_flags;        /* Architecture-specific flags. */
  73         Elf64_Half      e_ehsize;       /* Size of ELF header in bytes. */
  74         Elf64_Half      e_phentsize;    /* Size of program header entry. */
  75         Elf64_Half      e_phnum;        /* Number of program header entries. */
  76         Elf64_Half      e_shentsize;    /* Size of section header entry. */
  77         Elf64_Half      e_shnum;        /* Number of section header entries. */
  78         Elf64_Half      e_shstrndx;     /* Section name strings section. */
  79 } Elf64_Ehdr;
  80
  81 /*
  82  * Shared object information, found in SHT_MIPS_LIBLIST.
  83  */
  84
  85 typedef struct {
  86         Elf64_Word l_name;              /* The name of a shared object. */
  87         Elf64_Word l_time_stamp;        /* 64-bit timestamp. */
  88         Elf64_Word l_checksum;          /* Checksum of visible symbols, sizes. */
  89         Elf64_Word l_version;           /* Interface version string index. */
  90         Elf64_Word l_flags;             /* Flags (LL_*). */
  91 } Elf64_Lib;
  92
  93 /*
  94  * Section header.
  95  */
  96
  97 typedef struct {
  98         Elf64_Word      sh_name;        /* Section name (index into the
  99                                            section header string table). */
 100         Elf64_Word      sh_type;        /* Section type. */
 101         Elf64_Xword     sh_flags;       /* Section flags. */
 102         Elf64_Addr      sh_addr;        /* Address in memory image. */
 103         Elf64_Off       sh_offset;      /* Offset in file. */
 104         Elf64_Xword     sh_size;        /* Size in bytes. */
 105         Elf64_Word      sh_link;        /* Index of a related section. */
 106         Elf64_Word      sh_info;        /* Depends on section type. */
 107         Elf64_Xword     sh_addralign;   /* Alignment in bytes. */
 108         Elf64_Xword     sh_entsize;     /* Size of each entry in section. */
 109 } Elf64_Shdr;
 110
 111 /*
 112  * Program header.
 113  */
 114
 115 typedef struct {
 116         Elf64_Word      p_type;         /* Entry type. */
 117         Elf64_Word      p_flags;        /* Access permission flags. */
 118         Elf64_Off       p_offset;       /* File offset of contents. */
 119         Elf64_Addr      p_vaddr;        /* Virtual address in memory image. */
 120         Elf64_Addr      p_paddr;        /* Physical address (not used). */
 121         Elf64_Xword     p_filesz;       /* Size of contents in file. */
 122         Elf64_Xword     p_memsz;        /* Size of contents in memory. */
 123         Elf64_Xword     p_align;        /* Alignment in memory and file. */
 124 } Elf64_Phdr;
 125
 126 /*
 127  * Dynamic structure.  The ".dynamic" section contains an array of them.
 128  */
 129
 130 typedef struct {
 131         Elf64_Sxword    d_tag;          /* Entry type. */
 132         union {
 133                 Elf64_Xword     d_val;  /* Integer value. */
 134                 Elf64_Addr      d_ptr;  /* Address value. */
 135         } d_un;
 136 } Elf64_Dyn;
 137
 138 /*
 139  * Relocation entries.
 140  */
 141
 142 /* Relocations that don't 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_Rel;
 147
 148 /* Relocations that need an addend field. */
 149 typedef struct {
 150         Elf64_Addr      r_offset;       /* Location to be relocated. */
 151         Elf64_Xword     r_info;         /* Relocation type and symbol index. */
 152         Elf64_Sxword    r_addend;       /* Addend. */
 153 } Elf64_Rela;
 154
 155 /* Macros for accessing the fields of r_info. */
 156 #define ELF64_R_SYM(info)       ((info) >> 32)
 157 #define ELF64_R_TYPE(info)      ((info) & 0xffffffffL)
 158
 159 /* Macro for constructing r_info from field values. */
 160 #define ELF64_R_INFO(sym, type) (((sym) << 32) + ((type) & 0xffffffffL))
 161
 162 #define ELF64_R_TYPE_DATA(info) (((Elf64_Xword)(info)<<32)>>40)
 163 #define ELF64_R_TYPE_ID(info)   (((Elf64_Xword)(info)<<56)>>56)
 164 #define ELF64_R_TYPE_INFO(data, type)   \
 165                                 (((Elf64_Xword)(data)<<8)+(Elf64_Xword)(type))
 166
 167 /*
 168  *      Note entry header
 169  */
 170 typedef Elf_Note Elf64_Nhdr;
 171
 172 /*
 173  *      Move entry
 174  */
 175 typedef struct {
 176         Elf64_Lword     m_value;        /* symbol value */
 177         Elf64_Xword     m_info;         /* size + index */
 178         Elf64_Xword     m_poffset;      /* symbol offset */
 179         Elf64_Half      m_repeat;       /* repeat count */
 180         Elf64_Half      m_stride;       /* stride info */
 181 } Elf64_Move;
 182
 183 #define ELF64_M_SYM(info)       ((info)>>8)
 184 #define ELF64_M_SIZE(info)      ((unsigned char)(info))
 185 #define ELF64_M_INFO(sym, size) (((sym)<<8)+(unsigned char)(size))
 186
 187 /*
 188  *      Hardware/Software capabilities entry
 189  */
 190 typedef struct {
 191         Elf64_Xword     c_tag;          /* how to interpret value */
 192         union {
 193                 Elf64_Xword     c_val;
 194                 Elf64_Addr      c_ptr;
 195         } c_un;
 196 } Elf64_Cap;
 197
 198 /*
 199  * Symbol table entries.
 200  */
 201
 202 typedef struct {
 203         Elf64_Word      st_name;        /* String table index of name. */
 204         unsigned char   st_info;        /* Type and binding information. */
 205         unsigned char   st_other;       /* Reserved (not used). */
 206         Elf64_Half      st_shndx;       /* Section index of symbol. */
 207         Elf64_Addr      st_value;       /* Symbol value. */
 208         Elf64_Xword     st_size;        /* Size of associated object. */
 209 } Elf64_Sym;
 210
 211 /* Macros for accessing the fields of st_info. */
 212 #define ELF64_ST_BIND(info)             ((info) >> 4)
 213 #define ELF64_ST_TYPE(info)             ((info) & 0xf)
 214
 215 /* Macro for constructing st_info from field values. */
 216 #define ELF64_ST_INFO(bind, type)       (((bind) << 4) + ((type) & 0xf))
 217
 218 /* Macro for accessing the fields of st_other. */
 219 #define ELF64_ST_VISIBILITY(oth)        ((oth) & 0x3)
 220
 221 /* Structures used by Sun & GNU-style symbol versioning. */
 222 typedef struct {
 223         Elf64_Half      vd_version;
 224         Elf64_Half      vd_flags;
 225         Elf64_Half      vd_ndx;
 226         Elf64_Half      vd_cnt;
 227         Elf64_Word      vd_hash;
 228         Elf64_Word      vd_aux;
 229         Elf64_Word      vd_next;
 230 } Elf64_Verdef;
 231
 232 typedef struct {
 233         Elf64_Word      vda_name;
 234         Elf64_Word      vda_next;
 235 } Elf64_Verdaux;
 236
 237 typedef struct {
 238         Elf64_Half      vn_version;
 239         Elf64_Half      vn_cnt;
 240         Elf64_Word      vn_file;
 241         Elf64_Word      vn_aux;
 242         Elf64_Word      vn_next;
 243 } Elf64_Verneed;
 244
 245 typedef struct {
 246         Elf64_Word      vna_hash;
 247         Elf64_Half      vna_flags;
 248         Elf64_Half      vna_other;
 249         Elf64_Word      vna_name;
 250         Elf64_Word      vna_next;
 251 } Elf64_Vernaux;
 252
 253 typedef Elf64_Half Elf64_Versym;
 254
 255 typedef struct {
 256         Elf64_Half      si_boundto;     /* direct bindings - symbol bound to */
 257         Elf64_Half      si_flags;       /* per symbol flags */
 258 } Elf64_Syminfo;
 259
 260 #endif /* !_SYS_ELF64_H_ */