lib/csu/sh3/crt0.c

   1 /*      $NetBSD: crt0.c,v 1.2 2005/12/24 22:02:10 perry Exp $   */
   2
   3 /*
   4  * Copyright (c) 1996 Charles M. Hannum.  All rights reserved.
   5  * Copyright (c) 1993 Paul Kranenburg
   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 by Paul Kranenburg.
  19  * 4. The name of the author may not be used to endorse or promote products
  20  *    derived from this software without specific prior written permission
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #undef  DYNAMIC
  35
  36 #include <stdlib.h>
  37
  38 #include "common.h"
  39
  40 extern  void            start __P((void)) __asm("start");
  41         void            __start __P((int, char *[], char *[]));
  42
  43 __asm("
  44         .text
  45         .align  2
  46         .globl  start
  47 start:
  48         bra     ___start
  49         nop
  50 ");
  51
  52 #if defined(LIBC_SCCS) && !defined(lint)
  53 __RCSID("$NetBSD: crt0.c,v 1.2 2005/12/24 22:02:10 perry Exp $");
  54 #endif /* LIBC_SCCS and not lint */
  55
  56 void
  57 __start(argc, argv, envp)
  58         int argc;
  59         char *argv[];
  60         char *envp[];
  61 {
  62         char *ap;
  63
  64         environ = envp;
  65
  66         if ((ap = argv[0]))
  67                 if ((__progname = _strrchr(ap, '/')) == NULL)
  68                         __progname = ap;
  69                 else
  70                         ++__progname;
  71
  72 #ifdef DYNAMIC
  73         /* ld(1) convention: if DYNAMIC = 0 then statically linked */
  74         if (&_DYNAMIC)
  75                 __load_rtld(&_DYNAMIC);
  76 #endif /* DYNAMIC */
  77
  78 #ifdef MCRT0
  79         atexit(_mcleanup);
  80         monstartup((u_long)&eprol, (u_long)&etext);
  81 #endif /* MCRT0 */
  82
  83 __asm("__callmain:");           /* Defined for the benefit of debuggers */
  84         exit(main(argc, argv, envp));
  85 }
  86
  87 #ifdef DYNAMIC
  88 __asm("
  89         .text
  90         .align  2
  91 ___syscall:
  92         sts     pr, r1
  93         mov     r4, r0
  94         mov     r1, r0
  95         trapa   #0x80
  96         bf      1f
  97         jmp     @r1
  98         nop
  99 1:
 100         mov     #0xff,r0
 101         jmp     @r1
 102         nop
 103 ");
 104 #endif /* DYNAMIC */
 105
 106 #include "common.c"
 107
 108 #ifdef MCRT0
 109 __asm("
 110         .text
 111         .align  2
 112 eprol:
 113 ");
 114 #endif /* MCRT0 */