lib/csu/ia64/crt0.c

   1 /* $NetBSD: crt0.c,v 1.2 2006/09/15 05:29:44 skrll 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 "common.h"
  38
  39 void    __start(char **, void (*cleanup)(void), const Obj_Entry *,
  40     struct ps_strings *);
  41
  42 void
  43 __start(char **sp,
  44     void (*cleanup)(void),      /* from shared loader */
  45     const Obj_Entry *obj,       /* from shared loader */
  46     struct ps_strings *ps_strings)
  47 {
  48         long argc;
  49         char **argv, *namep;
  50
  51         __asm __volatile__ ("1:                                         \
  52                                 { .mii                                  \
  53                                   mov           r15=@gprel(1b)  \n      \
  54                                   mov           r16=ip  ;;      \n      \
  55                                   sub           gp=r16,r15      \n      \
  56                                 ;;                                      \
  57                                 } ");
  58
  59         argc = *(long *)sp;
  60         argv = sp + 1;
  61         environ = sp + 2 + argc;                /* 2: argc + NULL ending argv */
  62
  63         if ((namep = argv[0]) != NULL) {        /* NULL ptr if argc = 0 */
  64                 if ((__progname = _strrchr(namep, '/')) == NULL)
  65                         __progname = namep;
  66                 else
  67                         __progname++;
  68         }
  69
  70         if (ps_strings != (struct ps_strings *)0 &&
  71             ps_strings != (struct ps_strings *)0xbabefacedeadbeef) /* XXX: Debug: see machdep.c:setregs() */
  72                 __ps_strings = ps_strings;
  73
  74 #ifdef DYNAMIC
  75         if (&_DYNAMIC != NULL)
  76                 _rtld_setup(cleanup, obj);
  77 #endif
  78
  79 #ifdef MCRT0
  80         atexit(_mcleanup);
  81         monstartup((u_long)&_eprol, (u_long)&_etext);
  82 #endif
  83
  84         atexit(_fini);
  85         _init();
  86
  87         exit(main(argc, argv, environ));        /* XXX: ia64 ABI says 4 parameters. */
  88 }
  89
  90 /*
  91  * NOTE: Leave the RCS ID _after_ __start(), in case it gets placed in .text.
  92  */
  93 #if defined(LIBC_SCCS) && !defined(lint)
  94 __RCSID("$NetBSD: crt0.c,v 1.2 2006/09/15 05:29:44 skrll Exp $");
  95 #endif /* LIBC_SCCS and not lint */
  96
  97 #include "common.c"