lib/csu/m68k_elf/crt0.c

   1 /* $NetBSD: crt0.c,v 1.10 2003/07/26 19:24:28 salo Exp $ */
   2
   3 /*
   4  * Copyright (c) 1999 Klaus Klein
   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("\n"
  44 "       .text                           \n"
  45 "       .align  4                       \n"
  46 "       .globl  _start                  \n"
  47 "_start:                                \n"
  48 "       movl    (%sp),%d0               \n"
  49 "       movl    %a2,-(%sp)              | ps_strings    \n"
  50 "       movl    %a0,-(%sp)              | obj           \n"
  51 "       movl    %a1,-(%sp)              | cleanup       \n"
  52 "       movl    %d0,%d1                 \n"
  53 "       lsll    #2,%d1                  \n"
  54 "       pea     (16+4)(%sp,%d1.l)       | envp = &argv[argc + 1]        \n"
  55 "       pea     20(%sp)                 | argv          \n"
  56 "       movl    %d0,-(%sp)              | argc          \n"
  57 "       jsr     __start");
  58
  59 void
  60 __start(int argc, char **argv, char **envp,
  61     void (*cleanup)(void),                      /* from shared loader */
  62     const Obj_Entry *obj,                       /* from shared loader */
  63     struct ps_strings *ps_strings)
  64 {
  65         environ = envp;
  66
  67         if ((__progname = argv[0]) != NULL) {   /* NULL ptr if argc = 0 */
  68                 if ((__progname = _strrchr(__progname, '/')) == NULL)
  69                         __progname = argv[0];
  70                 else
  71                         __progname++;
  72         }
  73
  74         if (ps_strings != (struct ps_strings *)0)
  75                 __ps_strings = ps_strings;
  76
  77 #ifdef DYNAMIC
  78         if (&_DYNAMIC != NULL)
  79                 _rtld_setup(cleanup, obj);
  80 #endif
  81
  82 #ifdef MCRT0
  83         atexit(_mcleanup);
  84         monstartup((u_long)&_eprol, (u_long)&_etext);
  85 #endif
  86
  87         atexit(_fini);
  88         _init();
  89
  90         exit(main(argc, argv, environ));
  91 }
  92
  93 /*
  94  * NOTE: Leave the RCS ID _after_ __start(), in case it gets placed in .text.
  95  */
  96 #if defined(LIBC_SCCS) && !defined(lint)
  97 __RCSID("$NetBSD: crt0.c,v 1.10 2003/07/26 19:24:28 salo Exp $");
  98 #endif /* LIBC_SCCS and not lint */
  99
 100 #include "common.c"