usr/src/boot/sys/sys/elf32.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_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_ */