lib/csu/common_elf/common.h

   1 /* $NetBSD: common.h,v 1.16 2012/03/21 10:09:20 matt Exp $ */
   2
   3 /*
   4  * Copyright (c) 1995 Christopher G. Demetriou
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *          This product includes software developed for the
  18  *          NetBSD Project.  See http://www.NetBSD.org/ for
  19  *          information about NetBSD.
  20  * 4. The name of the author may not be used to endorse or promote products
  21  *    derived from this software without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  24  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  25  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  26  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  27  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  28  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  29  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  30  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  31  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  32  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  33  *
  34  * <<Id: LICENSE,v 1.2 2000/06/14 15:57:33 cgd Exp>>
  35  */
  36
  37 #include <sys/types.h>
  38 #include <sys/exec.h>
  39 #if !defined(__minix)
  40 #include <sys/syscall.h>
  41 #endif /* !defined(__minix) */
  42
  43 #include <stdlib.h>
  44 #ifdef DYNAMIC
  45 #ifdef __weak_alias
  46 #define dlopen  _dlopen
  47 #define dlclose _dlclose
  48 #define dlsym   _dlsym
  49 #define dlerror _dlerror
  50 #define dladdr  _dladdr
  51 #endif
  52 #include <dlfcn.h>
  53 #include "rtld.h"
  54 #else
  55 typedef void Obj_Entry;
  56 #endif
  57
  58 extern quad_t   __syscall(quad_t, ...);
  59 #define _exit(v)        __syscall(SYS_exit, (v))
  60 #define write(fd, s, n) __syscall(SYS_write, (fd), (s), (n))
  61
  62 #define _FATAL(str)                             \
  63 do {                                            \
  64         write(2, str, sizeof(str)-1);           \
  65         _exit(1);                               \
  66 } while (0)
  67
  68 static char     *_strrchr(char *, int);
  69
  70 char    **environ;
  71 char    *__progname = __UNCONST("");
  72 struct ps_strings *__ps_strings = 0;
  73
  74 extern void     _init(void);
  75 extern void     _fini(void);
  76 extern void     _libc_init(void);
  77
  78 #ifdef DYNAMIC
  79 void    _rtld_setup(void (*)(void), const Obj_Entry *obj);
  80
  81 /*
  82  * Arrange for _DYNAMIC to be weak and undefined (and therefore to show up
  83  * as being at address zero, unless something else defines it).  That way,
  84  * if we happen to be compiling without -static but with without any
  85  * shared libs present, things will still work.
  86  */
  87 __weakref_visible int rtld_DYNAMIC __weak_reference(_DYNAMIC);
  88 #endif /* DYNAMIC */
  89
  90 #ifdef MCRT0
  91 extern void     monstartup(u_long, u_long);
  92 extern void     _mcleanup(void);
  93 extern unsigned char _etext, _eprol;
  94 #endif /* MCRT0 */
  95
  96 int main(int, char **, char **);