lib/libelf/_elftc.h

   1 /*-
   2  * Copyright (c) 2009 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  * $Id$
  27  */
  28
  29 /**
  30  ** Miscellanous definitions needed by multiple components.
  31  **/
  32
  33 #ifndef _ELFTC_H
  34 #define _ELFTC_H
  35
  36 #ifndef NULL
  37 #define NULL    ((void *) 0)
  38 #endif
  39
  40 #ifndef offsetof
  41 #define offsetof(T, M)          ((int) &((T*) 0) -> M)
  42 #endif
  43
  44 /*
  45  * Supply macros missing from <sys/queue.h>
  46  */
  47
  48 #ifndef STAILQ_FOREACH_SAFE
  49 #define STAILQ_FOREACH_SAFE(var, head, field, tvar)            \
  50        for ((var) = STAILQ_FIRST((head));                      \
  51             (var) && ((tvar) = STAILQ_NEXT((var), field), 1);  \
  52             (var) = (tvar))
  53 #endif
  54
  55 #ifndef STAILQ_LAST
  56 #define STAILQ_LAST(head, type, field)                                  \
  57         (STAILQ_EMPTY((head)) ?                                         \
  58                 NULL :                                                  \
  59                 ((struct type *)(void *)                                \
  60                 ((char *)((head)->stqh_last) - offsetof(struct type, field))))
  61 #endif
  62
  63 #ifndef TAILQ_FOREACH_SAFE
  64 #define TAILQ_FOREACH_SAFE(var, head, field, tvar)                      \
  65         for ((var) = TAILQ_FIRST((head));                               \
  66             (var) && ((tvar) = TAILQ_NEXT((var), field), 1);            \
  67             (var) = (tvar))
  68 #endif
  69
  70 /*
  71  * VCS Ids.
  72  */
  73
  74 #ifndef ELFTC_VCSID
  75
  76 #if defined(__FreeBSD__)
  77 #define ELFTC_VCSID(ID)         __FBSDID(ID)
  78 #endif
  79
  80 #if defined(__linux__) || defined(__GNU__) || defined(__GLIBC__)
  81 #define ELFTC_VCSID(ID)         /**/
  82 #endif
  83
  84 #if defined(__NetBSD__)
  85 #define ELFTC_VCSID(ID)         __RCSID(ID)
  86 #endif
  87
  88 #endif  /* ELFTC_VCSID */
  89
  90 /*
  91  * Provide an equivalent for getprogname(3).
  92  */
  93
  94 #ifndef ELFTC_GETPROGNAME
  95
  96 #if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__minix)
  97
  98 #include <stdlib.h>
  99
 100 #define ELFTC_GETPROGNAME()     getprogname()
 101
 102 #endif  /* defined(__FreeBSD__) || defined(__NetBSD__) || defined(__minix) */
 103
 104
 105 #if defined(__linux__)
 106
 107 /*
 108  * GLIBC based systems have a global 'char *' pointer referencing
 109  * the executable's name.
 110  */
 111 extern const char *program_invocation_short_name;
 112
 113 #define ELFTC_GETPROGNAME()     program_invocation_short_name
 114
 115 #endif  /* __linux__ */
 116
 117 #endif  /* ELFTC_GETPROGNAME */
 118
 119 /**
 120  ** Per-OS configuration.
 121  **/
 122
 123 #if defined(__linux__)
 124
 125 #include <endian.h>
 126
 127 #define ELFTC_BYTE_ORDER                        __BYTE_ORDER
 128 #define ELFTC_BYTE_ORDER_LITTLE_ENDIAN          __LITTLE_ENDIAN
 129 #define ELFTC_BYTE_ORDER_BIG_ENDIAN             __BIG_ENDIAN
 130
 131 /*
 132  * Debian GNU/Linux is missing strmode(3).
 133  */
 134 #define ELFTC_HAVE_STRMODE                      0
 135
 136 /* Whether we need to supply {be,le}32dec. */
 137 #define ELFTC_NEED_BYTEORDER_EXTENSIONS         1
 138
 139 #define roundup2        roundup
 140
 141 #endif  /* __linux__ */
 142
 143
 144 #if defined(__FreeBSD__)
 145
 146 #include <sys/endian.h>
 147
 148 #define ELFTC_BYTE_ORDER                        _BYTE_ORDER
 149 #define ELFTC_BYTE_ORDER_LITTLE_ENDIAN          _LITTLE_ENDIAN
 150 #define ELFTC_BYTE_ORDER_BIG_ENDIAN             _BIG_ENDIAN
 151
 152 #define ELFTC_HAVE_STRMODE      1
 153 #endif  /* __FreeBSD__ */
 154
 155
 156 #if defined(__NetBSD__) || defined(__minix)
 157
 158 #include <sys/endian.h>
 159
 160 #define ELFTC_BYTE_ORDER                        _BYTE_ORDER
 161 #define ELFTC_BYTE_ORDER_LITTLE_ENDIAN          _LITTLE_ENDIAN
 162 #define ELFTC_BYTE_ORDER_BIG_ENDIAN             _BIG_ENDIAN
 163
 164 #define ELFTC_HAVE_STRMODE      1
 165 #endif  /* __NetBSD __ || __minix */
 166
 167 #endif  /* _ELFTC_H */