NetBSD/lib/csu/ns32k/crt0.c

146 lines
3.7 KiB
C
Raw Normal View History

1998-09-05 17:20:07 +04:00
/* $NetBSD: crt0.c,v 1.15 1998/09/05 13:20:08 pk Exp $ */
1996-10-18 09:36:42 +04:00
1998-09-05 17:20:07 +04:00
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
1993-09-17 22:42:11 +04:00
* All rights reserved.
*
1998-09-05 17:20:07 +04:00
* This code is derived from software contributed to The NetBSD Foundation
* by Paul Kranenburg.
*
1993-09-17 22:42:11 +04:00
* 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:
1998-09-05 17:20:07 +04:00
* 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.
1994-05-03 11:35:28 +04:00
*
1998-09-05 17:20:07 +04:00
* 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.
1993-09-17 22:42:11 +04:00
*/
#include <stdlib.h>
1995-06-03 17:16:03 +04:00
#include "common.h"
1994-05-03 11:35:28 +04:00
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");
1994-05-03 11:35:28 +04:00
void
start(arg0)
char *arg0;
1993-09-17 22:42:11 +04:00
{
int argc;
char **argv;
char *ap;
argv = &arg0;
argc = ((int *)argv)[-1];
environ = argv + argc + 1;
__ps_strings = kps_strings;
1994-05-03 11:35:28 +04:00
1995-05-17 19:55:26 +04:00
if (ap = argv[0])
if ((__progname = _strrchr(ap, '/')) == NULL)
__progname = ap;
1994-05-03 11:35:28 +04:00
else
++__progname;
#ifdef DYNAMIC
/* ld(1) convention: if DYNAMIC = 0 then statically linked */
#ifdef stupid_gcc
if (&_DYNAMIC)
#else
1995-06-03 17:16:03 +04:00
if ( ({volatile caddr_t x = (caddr_t)&_DYNAMIC; x; }) )
1994-05-03 11:35:28 +04:00
#endif
1995-06-03 17:16:03 +04:00
__load_rtld(&_DYNAMIC);
1994-05-03 11:35:28 +04:00
#endif /* DYNAMIC */
1993-09-17 22:42:11 +04:00
#ifdef MCRT0
atexit(_mcleanup);
monstartup((u_long)&eprol, (u_long)&etext);
1993-09-17 22:42:11 +04:00
#endif MCRT0
1994-05-03 11:35:28 +04:00
__asm("__callmain:"); /* Defined for the benefit of debuggers */
exit(main(argc, argv, environ));
1993-09-17 22:42:11 +04:00
}
/*
* RCSid. Place after __start for programs that assume start of text
* is the entrypoint. (Not really necessary, just to avoid confusion).
*/
#if defined(LIBC_SCCS) && !defined(lint)
1998-09-05 17:20:07 +04:00
__RCSID("$NetBSD: crt0.c,v 1.15 1998/09/05 13:20:08 pk Exp $");
#endif /* LIBC_SCCS and not lint */
1994-05-03 11:35:28 +04:00
#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 */
");
1994-05-03 11:35:28 +04:00
#ifndef ntohl
__asm("
.text
.align 2
_ntohl: movd 4(sp),r0
rotw 8,r0
rotd 16,r0
rotw 8,r0
ret 0
");
1994-05-03 11:35:28 +04:00
#endif
#endif /* DYNAMIC */
1995-06-03 17:16:03 +04:00
#include "common.c"
1994-05-03 11:35:28 +04:00
#ifdef MCRT0
__asm("
.text
.align 2
eprol:
");
1994-05-03 11:35:28 +04:00
#endif