116 lines
3.4 KiB
C
116 lines
3.4 KiB
C
/* $NetBSD: crt0.c,v 1.2 1995/12/12 08:04:47 ragge 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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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "%W% (Erasmus) %G%";
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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 "common.h"
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extern void start __P((void)) asm("start");
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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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/*
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* ALL REGISTER VARIABLES!!!
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*/
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register struct kframe *kfp;
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register char **argv, *ap;
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#ifdef lint
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kfp = 0;
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initcode = initcode = 0;
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#else /* not lint */
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/* make kfp point to the arguments on stack */
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asm ("movl sp, %0" : "=r" (kfp));
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#endif /* not lint */
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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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#ifdef DYNAMIC
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/* ld(1) convention: if DYNAMIC = 0 then statically linked */
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#ifdef stupid_gcc
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if (&_DYNAMIC)
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#else
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if ( ({volatile caddr_t x = (caddr_t)&_DYNAMIC; x; }) )
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#endif
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__load_rtld(&_DYNAMIC);
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#endif /* DYNAMIC */
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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(kfp->kargc, argv, environ));
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}
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#ifdef DYNAMIC
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asm(" ___syscall:");
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asm(" .word 0"); /* no registers to save */
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asm(" movl 4(ap), r0"); /* get syscall number */
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asm(" subl3 $1,(ap)+,(ap)"); /* n-1 args to syscall */
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asm(" chmk r0"); /* do system call */
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asm(" jcs 1f"); /* check error */
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asm(" ret"); /* return */
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asm(" 1: movl $-1, r0");
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asm(" ret");
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#endif /* DYNAMIC */
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#include "common.c"
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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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