102 lines
3.1 KiB
C
102 lines
3.1 KiB
C
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/* $NetBSD: crt0.c,v 1.1 1997/03/05 03:45:06 jonathan Exp $ */
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/*
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* Copyright (c) 1993 Paul Kranenburg
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Paul Kranenburg.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char rcsid[] = "$NetBSD: crt0.c,v 1.1 1997/03/05 03:45:06 jonathan Exp $";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/param.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#ifndef CRTN
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extern void start __P((long)) asm("start");
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extern void _mcleanup __P((void));
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extern unsigned char eprol asm ("eprol");
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extern unsigned char etext;
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char **environ;
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static char empty[1];
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char *__progname = empty;
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void
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__start()
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{
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struct kframe {
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int kargc;
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char *kargv[1]; /* size depends on kargc */
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char kargstr[1]; /* size varies */
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char kenvstr[1]; /* size varies */
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};
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register struct kframe *kfp;
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register char **argv, *ap;
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register int argc;
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#ifndef DYNAMIC
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asm(" la $28,_gp");
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asm(" addiu %0,$29,32" : "=r" (kfp));
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#else
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asm(" addiu %0,$29,48" : "=r" (kfp));
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#endif
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/* just above the saved frame pointer
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kfp = (struct kframe *) (¶m-1);*/
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argc = kfp->kargc;
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argv = &kfp->kargv[0];
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environ = argv + kfp->kargc + 1;
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if (ap = argv[0])
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if ((__progname = strrchr(ap, '/')) == NULL)
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__progname = ap;
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else
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++__progname;
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asm("eprol:");
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#ifdef MCRT0
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atexit(_mcleanup);
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monstartup((u_long)&eprol, (u_long)&etext);
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#endif MCRT0
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asm ("_callmain:"); /* Defined for the benefit of debuggers */
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exit(main(argc, argv, environ));
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}
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#ifdef MCRT0
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asm (" .text");
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asm ("_eprol:");
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#endif
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#endif
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