NetBSD/lib/csu/i386/crt0.c

126 lines
3.2 KiB
C

/* $NetBSD: crt0.c,v 1.28 1997/10/20 13:49:45 mycroft Exp $ */
/*
* Copyright (c) 1996 Charles M. Hannum. All rights reserved.
* 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.
*/
#include <sys/cdefs.h>
#include <sys/param.h>
#include <stdlib.h>
#include "common.h"
extern unsigned char etext;
extern unsigned char eprol asm("eprol");
extern void start __P((void)) asm("start");
void __start __P((int, char *[], char *[]));
__asm("
.text
.align 2
.globl start
start:
movl %ebx,___ps_strings
movl (%esp),%eax
leal 8(%esp,%eax,4),%ecx
leal 4(%esp),%edx
pushl %ecx
pushl %edx
pushl %eax
call ___start
");
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: crt0.c,v 1.28 1997/10/20 13:49:45 mycroft Exp $");
#endif /* LIBC_SCCS and not lint */
void
__start(argc, argv, envp)
int argc;
char *argv[];
char *envp[];
{
char *ap;
environ = envp;
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, envp));
}
#ifdef DYNAMIC
asm("
.text
.align 2
___syscall:
popl %ecx
popl %eax
pushl %ecx
int $0x80
jc 1f
jmp %ecx
1:
movl $-1,%eax
jmp %ecx
");
#endif /* DYNAMIC */
#include "common.c"
#ifdef MCRT0
__asm("
.text
.align 2
eprol:
");
#endif /* MCRT0 */