NetBSD/lib/csu/ns32k/crt0.c

137 lines
3.3 KiB
C

/* $NetBSD: crt0.c,v 1.9 1996/12/27 08:30:13 matthias Exp $ */
/*
* Copyright (c) 1993 Paul Kranenburg
* All rights reserved.
*
* 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 Paul Kranenburg.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char rcsid[] = "$NetBSD: crt0.c,v 1.9 1996/12/27 08:30:13 matthias Exp $";
#endif /* LIBC_SCCS and not lint */
#include <sys/param.h>
#include <stdlib.h>
#include "common.h"
extern void start __P((char *)) __asm("start");
/*
* Stack layout provided to start:
*
* environ[n]
* ...
* environ[0]
* argv[argc-1]
* ...
* argv[1]
* argv[0]
* argc
* saved FP
*
* The address of PS_STRINGS is passed in r7 by the kernel.
*/
register struct ps_strings *kps_strings __asm("r7");
void
start(arg0)
char *arg0;
{
int argc;
char **argv;
char *ap;
argv = &arg0;
argc = ((int *)argv)[-1];
environ = argv + argc + 1;
__ps_strings = kps_strings;
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 */
#ifdef MCRT0
atexit(_mcleanup);
monstartup((u_long)&eprol, (u_long)&etext);
#endif MCRT0
__asm("__callmain:"); /* Defined for the benefit of debuggers */
exit(main(argc, argv, environ));
}
#ifdef DYNAMIC
__asm("
.text
.align 2
___syscall:
movd tos,r1 /* return address */
movd tos,r0 /* syscall number */
movd r1,tos
svc /* do system call */
bcc 1f /* check error */
movqd -1,r0
1: jump 0(0(sp)) /* return */
");
#ifndef ntohl
__asm("
.text
.align 2
_ntohl: movd 4(sp),r0
rotw 8,r0
rotd 16,r0
rotw 8,r0
ret 0
");
#endif
#endif /* DYNAMIC */
#include "common.c"
#ifdef MCRT0
__asm("
.text
.align 2
eprol:
");
#endif