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: src/sys/sys/elf32.h,v 1.7 1999/08/28 00:51:41 peter Exp $
  27  */
  28
  29 #ifndef _SYS_ELF32_H_
  30 #define _SYS_ELF32_H_
  31
  32 #ifndef _SYS_TYPES_H_
  33 #include <sys/types.h>
  34 #endif
  35 #ifndef _SYS_ELF_COMMON_H_
  36 #include <sys/elf_common.h>
  37 #endif
  38
  39 /*
  40  * ELF definitions common to all 32-bit architectures.
  41  */
  42
  43 typedef uint32_t        Elf32_Addr;
  44 typedef uint16_t        Elf32_Half;
  45 typedef uint32_t        Elf32_Off;
  46 typedef int32_t         Elf32_Sword;
  47 typedef uint32_t        Elf32_Word;
  48 typedef uint32_t        Elf32_Size;
  49 typedef Elf32_Off       Elf32_Hashelt;
  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  * Section header.
  74  */
  75
  76 typedef struct {
  77         Elf32_Word      sh_name;        /* Section name (index into the
  78                                            section header string table). */
  79         Elf32_Word      sh_type;        /* Section type. */
  80         Elf32_Word      sh_flags;       /* Section flags. */
  81         Elf32_Addr      sh_addr;        /* Address in memory image. */
  82         Elf32_Off       sh_offset;      /* Offset in file. */
  83         Elf32_Size      sh_size;        /* Size in bytes. */
  84         Elf32_Word      sh_link;        /* Index of a related section. */
  85         Elf32_Word      sh_info;        /* Depends on section type. */
  86         Elf32_Size      sh_addralign;   /* Alignment in bytes. */
  87         Elf32_Size      sh_entsize;     /* Size of each entry in section. */
  88 } Elf32_Shdr;
  89
  90 /*
  91  * Program header.
  92  */
  93
  94 typedef struct {
  95         Elf32_Word      p_type;         /* Entry type. */
  96         Elf32_Off       p_offset;       /* File offset of contents. */
  97         Elf32_Addr      p_vaddr;        /* Virtual address in memory image. */
  98         Elf32_Addr      p_paddr;        /* Physical address (not used). */
  99         Elf32_Size      p_filesz;       /* Size of contents in file. */
 100         Elf32_Size      p_memsz;        /* Size of contents in memory. */
 101         Elf32_Word      p_flags;        /* Access permission flags. */
 102         Elf32_Size      p_align;        /* Alignment in memory and file. */
 103 } Elf32_Phdr;
 104
 105 /*
 106  * Dynamic structure.  The ".dynamic" section contains an array of them.
 107  */
 108
 109 typedef struct {
 110         Elf32_Sword     d_tag;          /* Entry type. */
 111         union {
 112                 Elf32_Size      d_val;  /* Integer value. */
 113                 Elf32_Addr      d_ptr;  /* Address value. */
 114         } d_un;
 115 } Elf32_Dyn;
 116
 117 /*
 118  * Relocation entries.
 119  */
 120
 121 /* Relocations that don't need an addend field. */
 122 typedef struct {
 123         Elf32_Addr      r_offset;       /* Location to be relocated. */
 124         Elf32_Word      r_info;         /* Relocation type and symbol index. */
 125 } Elf32_Rel;
 126
 127 /* Relocations that need an addend field. */
 128 typedef struct {
 129         Elf32_Addr      r_offset;       /* Location to be relocated. */
 130         Elf32_Word      r_info;         /* Relocation type and symbol index. */
 131         Elf32_Sword     r_addend;       /* Addend. */
 132 } Elf32_Rela;
 133
 134 /* Macros for accessing the fields of r_info. */
 135 #define ELF32_R_SYM(info)       ((info) >> 8)
 136 #define ELF32_R_TYPE(info)      ((unsigned char)(info))
 137
 138 /* Macro for constructing r_info from field values. */
 139 #define ELF32_R_INFO(sym, type) (((sym) << 8) + (unsigned char)(type))
 140
 141 /*
 142  * Symbol table entries.
 143  */
 144
 145 typedef struct {
 146         Elf32_Word      st_name;        /* String table index of name. */
 147         Elf32_Addr      st_value;       /* Symbol value. */
 148         Elf32_Size      st_size;        /* Size of associated object. */
 149         unsigned char   st_info;        /* Type and binding information. */
 150         unsigned char   st_other;       /* Reserved (not used). */
 151         Elf32_Half      st_shndx;       /* Section index of symbol. */
 152 } Elf32_Sym;
 153
 154 /* Macros for accessing the fields of st_info. */
 155 #define ELF32_ST_BIND(info)             ((info) >> 4)
 156 #define ELF32_ST_TYPE(info)             ((info) & 0xf)
 157
 158 /* Macro for constructing st_info from field values. */
 159 #define ELF32_ST_INFO(bind, type)       (((bind) << 4) + ((type) & 0xf))
 160
 161 /* Macro for accessing the fields of st_other. */
 162 #define ELF32_ST_VISIBILITY(oth)        ((oth) & 0x3)
 163
 164 /* Structures used by Sun & GNU symbol versioning. */
 165 typedef struct
 166 {
 167         Elf32_Half      vd_version;
 168         Elf32_Half      vd_flags;
 169         Elf32_Half      vd_ndx;
 170         Elf32_Half      vd_cnt;
 171         Elf32_Word      vd_hash;
 172         Elf32_Word      vd_aux;
 173         Elf32_Word      vd_next;
 174 } Elf32_Verdef;
 175
 176 typedef struct
 177 {
 178         Elf32_Word      vda_name;
 179         Elf32_Word      vda_next;
 180 } Elf32_Verdaux;
 181
 182 typedef struct
 183 {
 184         Elf32_Half      vn_version;
 185         Elf32_Half      vn_cnt;
 186         Elf32_Word      vn_file;
 187         Elf32_Word      vn_aux;
 188         Elf32_Word      vn_next;
 189 } Elf32_Verneed;
 190
 191 typedef struct
 192 {
 193         Elf32_Word      vna_hash;
 194         Elf32_Half      vna_flags;
 195         Elf32_Half      vna_other;
 196         Elf32_Word      vna_name;
 197         Elf32_Word      vna_next;
 198 } Elf32_Vernaux;
 199
 200 typedef Elf32_Half Elf32_Versym;
 201
 202 typedef struct {
 203         Elf32_Half      si_boundto;     /* direct bindings - symbol bound to */
 204         Elf32_Half      si_flags;       /* per symbol flags */
 205 } Elf32_Syminfo;
 206
 207 #endif /* !_SYS_ELF32_H_ */