137 lines
3.3 KiB
C
137 lines
3.3 KiB
C
/* $NetBSD: crt0.c,v 1.9 1996/12/27 08:30:13 matthias 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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#if defined(LIBC_SCCS) && !defined(lint)
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static char rcsid[] = "$NetBSD: crt0.c,v 1.9 1996/12/27 08:30:13 matthias Exp $";
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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((char *)) __asm("start");
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/*
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* Stack layout provided to start:
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*
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* environ[n]
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* ...
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* environ[0]
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* argv[argc-1]
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* ...
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* argv[1]
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* argv[0]
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* argc
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* saved FP
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*
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* The address of PS_STRINGS is passed in r7 by the kernel.
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*/
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register struct ps_strings *kps_strings __asm("r7");
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void
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start(arg0)
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char *arg0;
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{
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int argc;
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char **argv;
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char *ap;
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argv = &arg0;
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argc = ((int *)argv)[-1];
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environ = argv + argc + 1;
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__ps_strings = kps_strings;
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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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#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(argc, argv, environ));
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}
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#ifdef DYNAMIC
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__asm("
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.text
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.align 2
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___syscall:
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movd tos,r1 /* return address */
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movd tos,r0 /* syscall number */
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movd r1,tos
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svc /* do system call */
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bcc 1f /* check error */
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movqd -1,r0
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1: jump 0(0(sp)) /* return */
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");
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#ifndef ntohl
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__asm("
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.text
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.align 2
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_ntohl: movd 4(sp),r0
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rotw 8,r0
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rotd 16,r0
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rotw 8,r0
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ret 0
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");
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#endif
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#endif /* DYNAMIC */
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#include "common.c"
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#ifdef MCRT0
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__asm("
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.text
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.align 2
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eprol:
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");
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#endif
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