contrib/elftoolchain/libelf/libelf.h

   1 /*-
   2  * Copyright (c) 2006,2008-2010 Joseph Koshy
   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  * $Id: libelf.h 3174 2015-03-27 17:13:41Z emaste $
  27  */
  28
  29 #ifndef _LIBELF_H_
  30 #define _LIBELF_H_
  31
  32 #include <sys/types.h>
  33
  34 #include <elfdefinitions.h>
  35
  36 /* Library private data structures */
  37 typedef struct _Elf Elf;
  38 typedef struct _Elf_Scn Elf_Scn;
  39
  40 /* File types */
  41 typedef enum {
  42         ELF_K_NONE = 0,
  43         ELF_K_AR,       /* `ar' archives */
  44         ELF_K_COFF,     /* COFF files (unsupported) */
  45         ELF_K_ELF,      /* ELF files */
  46         ELF_K_NUM
  47 } Elf_Kind;
  48
  49 #define ELF_K_FIRST     ELF_K_NONE
  50 #define ELF_K_LAST      ELF_K_NUM
  51
  52 /* Data types */
  53 typedef enum {
  54         ELF_T_ADDR,
  55         ELF_T_BYTE,
  56         ELF_T_CAP,
  57         ELF_T_DYN,
  58         ELF_T_EHDR,
  59         ELF_T_HALF,
  60         ELF_T_LWORD,
  61         ELF_T_MOVE,
  62         ELF_T_MOVEP,
  63         ELF_T_NOTE,
  64         ELF_T_OFF,
  65         ELF_T_PHDR,
  66         ELF_T_REL,
  67         ELF_T_RELA,
  68         ELF_T_SHDR,
  69         ELF_T_SWORD,
  70         ELF_T_SXWORD,
  71         ELF_T_SYMINFO,
  72         ELF_T_SYM,
  73         ELF_T_VDEF,
  74         ELF_T_VNEED,
  75         ELF_T_WORD,
  76         ELF_T_XWORD,
  77         ELF_T_GNUHASH,  /* GNU style hash tables. */
  78         ELF_T_NUM
  79 } Elf_Type;
  80
  81 #define ELF_T_FIRST     ELF_T_ADDR
  82 #define ELF_T_LAST      ELF_T_GNUHASH
  83
  84 /* Commands */
  85 typedef enum {
  86         ELF_C_NULL = 0,
  87         ELF_C_CLR,
  88         ELF_C_FDDONE,
  89         ELF_C_FDREAD,
  90         ELF_C_RDWR,
  91         ELF_C_READ,
  92         ELF_C_SET,
  93         ELF_C_WRITE,
  94         ELF_C_NUM
  95 } Elf_Cmd;
  96
  97 #define ELF_C_FIRST     ELF_C_NULL
  98 #define ELF_C_LAST      ELF_C_NUM
  99
 100 /*
 101  * An `Elf_Data' structure describes data in an
 102  * ELF section.
 103  */
 104 typedef struct _Elf_Data {
 105         /*
 106          * `Public' members that are part of the ELF(3) API.
 107          */
 108         uint64_t        d_align;
 109         void            *d_buf;
 110         uint64_t        d_off;
 111         uint64_t        d_size;
 112         Elf_Type        d_type;
 113         unsigned int    d_version;
 114 } Elf_Data;
 115
 116 /*
 117  * An `Elf_Arhdr' structure describes an archive
 118  * header.
 119  */
 120 typedef struct {
 121         time_t          ar_date;
 122         char            *ar_name;       /* archive member name */
 123         gid_t           ar_gid;
 124         mode_t          ar_mode;
 125         char            *ar_rawname;    /* 'raw' member name */
 126         size_t          ar_size;
 127         uid_t           ar_uid;
 128
 129         /*
 130          * Members that are not part of the public API.
 131          */
 132         unsigned int    ar_flags;
 133 } Elf_Arhdr;
 134
 135 /*
 136  * An `Elf_Arsym' describes an entry in the archive
 137  * symbol table.
 138  */
 139 typedef struct {
 140         off_t           as_off;         /* byte offset to member's header */
 141         unsigned long   as_hash;        /* elf_hash() value for name */
 142         char            *as_name;       /* null terminated symbol name */
 143 } Elf_Arsym;
 144
 145 /*
 146  * Error numbers.
 147  */
 148
 149 enum Elf_Error {
 150         ELF_E_NONE,     /* No error */
 151         ELF_E_ARCHIVE,  /* Malformed ar(1) archive */
 152         ELF_E_ARGUMENT, /* Invalid argument */
 153         ELF_E_CLASS,    /* Mismatched ELF class */
 154         ELF_E_DATA,     /* Invalid data descriptor */
 155         ELF_E_HEADER,   /* Missing or malformed ELF header */
 156         ELF_E_IO,       /* I/O error */
 157         ELF_E_LAYOUT,   /* Layout constraint violation */
 158         ELF_E_MODE,     /* Wrong mode for ELF descriptor */
 159         ELF_E_RANGE,    /* Value out of range */
 160         ELF_E_RESOURCE, /* Resource exhaustion */
 161         ELF_E_SECTION,  /* Invalid section descriptor */
 162         ELF_E_SEQUENCE, /* API calls out of sequence */
 163         ELF_E_UNIMPL,   /* Feature is unimplemented */
 164         ELF_E_VERSION,  /* Unknown API version */
 165         ELF_E_NUM       /* Max error number */
 166 };
 167
 168 /*
 169  * Flags defined by the API.
 170  */
 171
 172 #define ELF_F_LAYOUT    0x001U  /* application will layout the file */
 173 #define ELF_F_DIRTY     0x002U  /* a section or ELF file is dirty */
 174
 175 /* ELF(3) API extensions. */
 176 #define ELF_F_ARCHIVE      0x100U /* archive creation */
 177 #define ELF_F_ARCHIVE_SYSV 0x200U /* SYSV style archive */
 178
 179 #ifdef __cplusplus
 180 extern "C" {
 181 #endif
 182 Elf             *elf_begin(int _fd, Elf_Cmd _cmd, Elf *_elf);
 183 int             elf_cntl(Elf *_elf, Elf_Cmd _cmd);
 184 int             elf_end(Elf *_elf);
 185 const char      *elf_errmsg(int _error);
 186 int             elf_errno(void);
 187 void            elf_fill(int _fill);
 188 unsigned int    elf_flagarhdr(Elf_Arhdr *_arh, Elf_Cmd _cmd,
 189                         unsigned int _flags);
 190 unsigned int    elf_flagdata(Elf_Data *_data, Elf_Cmd _cmd,
 191                         unsigned int _flags);
 192 unsigned int    elf_flagehdr(Elf *_elf, Elf_Cmd _cmd, unsigned int _flags);
 193 unsigned int    elf_flagelf(Elf *_elf, Elf_Cmd _cmd, unsigned int _flags);
 194 unsigned int    elf_flagphdr(Elf *_elf, Elf_Cmd _cmd, unsigned int _flags);
 195 unsigned int    elf_flagscn(Elf_Scn *_scn, Elf_Cmd _cmd, unsigned int _flags);
 196 unsigned int    elf_flagshdr(Elf_Scn *_scn, Elf_Cmd _cmd, unsigned int _flags);
 197 Elf_Arhdr       *elf_getarhdr(Elf *_elf);
 198 Elf_Arsym       *elf_getarsym(Elf *_elf, size_t *_ptr);
 199 off_t           elf_getbase(Elf *_elf);
 200 Elf_Data        *elf_getdata(Elf_Scn *, Elf_Data *);
 201 char            *elf_getident(Elf *_elf, size_t *_ptr);
 202 int             elf_getphdrnum(Elf *_elf, size_t *_dst);
 203 int             elf_getphnum(Elf *_elf, size_t *_dst);  /* Deprecated */
 204 Elf_Scn         *elf_getscn(Elf *_elf, size_t _index);
 205 int             elf_getshdrnum(Elf *_elf, size_t *_dst);
 206 int             elf_getshnum(Elf *_elf, size_t *_dst);  /* Deprecated */
 207 int             elf_getshdrstrndx(Elf *_elf, size_t *_dst);
 208 int             elf_getshstrndx(Elf *_elf, size_t *_dst); /* Deprecated */
 209 unsigned long   elf_hash(const char *_name);
 210 Elf_Kind        elf_kind(Elf *_elf);
 211 Elf             *elf_memory(char *_image, size_t _size);
 212 size_t          elf_ndxscn(Elf_Scn *_scn);
 213 Elf_Data        *elf_newdata(Elf_Scn *_scn);
 214 Elf_Scn         *elf_newscn(Elf *_elf);
 215 Elf_Scn         *elf_nextscn(Elf *_elf, Elf_Scn *_scn);
 216 Elf_Cmd         elf_next(Elf *_elf);
 217 Elf             *elf_open(int _fd);
 218 Elf             *elf_openmemory(char *_image, size_t _size);
 219 off_t           elf_rand(Elf *_elf, off_t _off);
 220 Elf_Data        *elf_rawdata(Elf_Scn *_scn, Elf_Data *_data);
 221 char            *elf_rawfile(Elf *_elf, size_t *_size);
 222 int             elf_setshstrndx(Elf *_elf, size_t _shnum);
 223 char            *elf_strptr(Elf *_elf, size_t _section, size_t _offset);
 224 off_t           elf_update(Elf *_elf, Elf_Cmd _cmd);
 225 unsigned int    elf_version(unsigned int _version);
 226
 227 long            elf32_checksum(Elf *_elf);
 228 size_t          elf32_fsize(Elf_Type _type, size_t _count,
 229                         unsigned int _version);
 230 Elf32_Ehdr      *elf32_getehdr(Elf *_elf);
 231 Elf32_Phdr      *elf32_getphdr(Elf *_elf);
 232 Elf32_Shdr      *elf32_getshdr(Elf_Scn *_scn);
 233 Elf32_Ehdr      *elf32_newehdr(Elf *_elf);
 234 Elf32_Phdr      *elf32_newphdr(Elf *_elf, size_t _count);
 235 Elf_Data        *elf32_xlatetof(Elf_Data *_dst, const Elf_Data *_src,
 236                         unsigned int _enc);
 237 Elf_Data        *elf32_xlatetom(Elf_Data *_dst, const Elf_Data *_src,
 238                         unsigned int _enc);
 239
 240 long            elf64_checksum(Elf *_elf);
 241 size_t          elf64_fsize(Elf_Type _type, size_t _count,
 242                         unsigned int _version);
 243 Elf64_Ehdr      *elf64_getehdr(Elf *_elf);
 244 Elf64_Phdr      *elf64_getphdr(Elf *_elf);
 245 Elf64_Shdr      *elf64_getshdr(Elf_Scn *_scn);
 246 Elf64_Ehdr      *elf64_newehdr(Elf *_elf);
 247 Elf64_Phdr      *elf64_newphdr(Elf *_elf, size_t _count);
 248 Elf_Data        *elf64_xlatetof(Elf_Data *_dst, const Elf_Data *_src,
 249                         unsigned int _enc);
 250 Elf_Data        *elf64_xlatetom(Elf_Data *_dst, const Elf_Data *_src,
 251                         unsigned int _enc);
 252 #ifdef __cplusplus
 253 }
 254 #endif
 255
 256 #endif  /* _LIBELF_H_ */