NetBSD/lib/csu/vax/crt0.c

127 lines
3.9 KiB
C

/* $NetBSD: crt0.c,v 1.10 1998/10/23 00:52:53 matt Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Paul Kranenburg.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdlib.h>
#include "common.h"
extern void start __P((void)) asm("start");
struct kframe {
int kargc;
char *kargv[1]; /* size depends on kargc */
char kargstr[1]; /* size varies */
char kenvstr[1]; /* size varies */
};
asm(" .text");
asm(" .align 2");
asm(" .globl start");
asm(" .type start,@function");
asm(" start:");
asm(" .word 0x0101"); /* two nops just in case */
asm(" pushl sp"); /* no registers to save */
asm(" calls $1,___start"); /* do the real start */
asm(" halt");
static void
__start(kfp)
struct kframe *kfp;
{
/*
* ALL REGISTER VARIABLES!!!
*/
char **argv, *ap;
argv = &kfp->kargv[0];
environ = argv + kfp->kargc + 1;
if (ap = argv[0])
if ((__progname = _strrchr(ap, '/')) == NULL)
__progname = ap;
else
++__progname;
#ifdef DYNAMIC
/* ld(1) convention: if DYNAMIC = 0 then statically linked */
#ifdef stupid_gcc
if (&_DYNAMIC)
#else
if ( ({volatile caddr_t x = (caddr_t)&_DYNAMIC; x; }) )
#endif
__load_rtld(&_DYNAMIC);
#endif /* DYNAMIC */
asm("eprol:");
#ifdef MCRT0
atexit(_mcleanup);
monstartup((u_long)&eprol, (u_long)&etext);
#endif MCRT0
asm ("__callmain:"); /* Defined for the benefit of debuggers */
exit(main(kfp->kargc, argv, environ));
}
#ifdef DYNAMIC
asm(" ___syscall:");
asm(" .word 0"); /* no registers to save */
asm(" addl2 $4,ap"); /* n-1 args to syscall */
asm(" movl (ap),r0"); /* get syscall number */
asm(" subl3 $1,-4(ap),(ap)"); /* n-1 args to syscall */
asm(" chmk r0"); /* do system call */
asm(" jcc 1f"); /* check error */
asm(" mnegl $1,r0");
asm(" ret");
asm(" 1: movpsl -(sp)"); /* flush the icache */
asm(" pushab 2f"); /* by issueing an REI */
asm(" rei");
asm(" 2: ret");
#endif /* DYNAMIC */
#include "common.c"
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: crt0.c,v 1.10 1998/10/23 00:52:53 matt Exp $");
#endif /* LIBC_SCCS and not lint */
#ifdef MCRT0
asm (" .text");
asm ("_eprol:");
#endif