lib/csu/vax_elf/crt0.c

   1 /* $NetBSD: crt0.c,v 1.10 2004/08/26 21:24:09 thorpej Exp $ */
   2
   3 /*
   4  * Copyright (c) 1999 Matt Thomas
   5  * Copyright (c) 1995 Christopher G. Demetriou
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *          This product includes software developed for the
  19  *          NetBSD Project.  See http://www.NetBSD.org/ for
  20  *          information about NetBSD.
  21  * 4. The name of the author may not be used to endorse or promote products
  22  *    derived from this software without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  25  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  26  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  27  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  28  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  29  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  30  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  31  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  32  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  33  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  34  *
  35  * <<Id: LICENSE,v 1.2 2000/06/14 15:57:33 cgd Exp>>
  36  */
  37
  38 #include "common.h"
  39
  40 void ___start(int, char **, char **, void (*cleanup)(void),
  41     const Obj_Entry *, struct ps_strings *);
  42
  43 __asm(" .text;"
  44 "       .align  2;"
  45 "       .globl  _start;"
  46 "       .globl  __start;"
  47 "__start:;"
  48 "_start:;"
  49 "       .word   0x0101;"
  50 "       pushl   %r9;"           /* ps_strings */
  51 "       pushl   %r8;"           /* obj */
  52 "       pushl   %r7;"           /* cleanup */
  53 "       movl    (%r6),%r0;"     /* argc */
  54 "       pushal  8(%r6)[%r0];"   /* envp = &argv[argc + 1] */
  55 "       pushal  4(%r6);"        /* argv */
  56 "       pushl   %r0;"           /* argc */
  57 "       calls   $6,___start;"
  58         );
  59
  60 void
  61 ___start(int argc, char **argv, char **envp,
  62     void (*cleanup)(void),                      /* from shared loader */
  63     const Obj_Entry *obj,                       /* from shared loader */
  64     struct ps_strings *ps_strings)
  65 {
  66         environ = envp;
  67
  68         if ((__progname = argv[0]) != NULL) {   /* NULL ptr if argc = 0 */
  69                 if ((__progname = _strrchr(__progname, '/')) == NULL)
  70                         __progname = argv[0];
  71                 else
  72                         __progname++;
  73         }
  74
  75         if (ps_strings != (struct ps_strings *)0)
  76                 __ps_strings = ps_strings;
  77
  78 #ifdef DYNAMIC
  79         if (&_DYNAMIC != NULL)
  80                 _rtld_setup(cleanup, obj);
  81 #endif
  82
  83 #ifdef MCRT0
  84         atexit(_mcleanup);
  85         monstartup((u_long)&_eprol, (u_long)&_etext);
  86 #endif
  87
  88         atexit(_fini);
  89         _init();
  90
  91         exit(main(argc, argv, environ));
  92 }
  93
  94 /*
  95  * NOTE: Leave the RCS ID _after_ __start(), in case it gets placed in .text.
  96  */
  97 #if defined(LIBC_SCCS) && !defined(lint)
  98 __RCSID("$NetBSD: crt0.c,v 1.10 2004/08/26 21:24:09 thorpej Exp $");
  99 #endif /* LIBC_SCCS and not lint */
 100
 101 #include "common.c"