127 lines
3.9 KiB
C
127 lines
3.9 KiB
C
/* $NetBSD: crt0.c,v 1.10 1998/10/23 00:52:53 matt Exp $ */
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/*-
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Paul Kranenburg.
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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 the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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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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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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asm(" .text");
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asm(" .align 2");
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asm(" .globl start");
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asm(" .type start,@function");
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asm(" start:");
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asm(" .word 0x0101"); /* two nops just in case */
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asm(" pushl sp"); /* no registers to save */
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asm(" calls $1,___start"); /* do the real start */
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asm(" halt");
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static void
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__start(kfp)
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struct kframe *kfp;
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{
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/*
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* ALL REGISTER VARIABLES!!!
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*/
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char **argv, *ap;
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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(" addl2 $4,ap"); /* n-1 args to syscall */
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asm(" movl (ap),r0"); /* get syscall number */
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asm(" subl3 $1,-4(ap),(ap)"); /* n-1 args to syscall */
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asm(" chmk r0"); /* do system call */
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asm(" jcc 1f"); /* check error */
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asm(" mnegl $1,r0");
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asm(" ret");
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asm(" 1: movpsl -(sp)"); /* flush the icache */
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asm(" pushab 2f"); /* by issueing an REI */
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asm(" rei");
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asm(" 2: ret");
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#endif /* DYNAMIC */
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#include "common.c"
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: crt0.c,v 1.10 1998/10/23 00:52:53 matt Exp $");
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#endif /* LIBC_SCCS and not lint */
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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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