NetBSD/lib/csu/x86_64/crt0.c

105 lines
3.3 KiB
C

/* $NetBSD: crt0.c,v 1.2 2003/07/26 19:24:31 salo Exp $ */
/*
* Copyright (c) 1998 Christos Zoulas
* Copyright (c) 1995 Christopher G. Demetriou
* 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 for the
* NetBSD Project. See http://www.NetBSD.org/ for
* information about NetBSD.
* 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.
*
* <<Id: LICENSE,v 1.2 2000/06/14 15:57:33 cgd Exp>>
*/
#include "common.h"
void ___start __P((int, char **, char **, void (*cleanup) __P((void)),
const Obj_Entry *, struct ps_strings *));
__asm(" .text ; \
.align 8 ; \
.globl __start ; \
.globl _start ; \
_start: ; \
__start: ; \
movq %rbx,%r9 ; \
movq %rcx,%r8 ; \
movq %rdx,%rcx ; \
movq (%rsp),%rdi ; \
leaq 16(%rsp,%rdi,8),%rdx ; \
leaq 8(%rsp),%rsi ; \
subq $8,%rsp ; \
andq $~15,%rsp ; \
addq $8,%rsp ; \
jmp ___start ; ");
void
___start(argc, argv, envp, cleanup, obj, ps_strings)
int argc;
char **argv;
char **envp;
void (*cleanup) __P((void)); /* from shared loader */
const Obj_Entry *obj; /* from shared loader */
struct ps_strings *ps_strings;
{
environ = envp;
if ((__progname = argv[0]) != NULL) { /* NULL ptr if argc = 0 */
if ((__progname = _strrchr(__progname, '/')) == NULL)
__progname = argv[0];
else
__progname++;
}
if (ps_strings != (struct ps_strings *)0)
__ps_strings = ps_strings;
#ifdef DYNAMIC
if (&_DYNAMIC != NULL)
_rtld_setup(cleanup, obj);
#endif
#ifdef MCRT0
atexit(_mcleanup);
monstartup((u_long)&_eprol, (u_long)&_etext);
#endif
atexit(_fini);
_init();
exit(main(argc, argv, environ));
}
/*
* NOTE: Leave the RCS ID _after_ __start(), in case it gets placed in .text.
*/
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: crt0.c,v 1.2 2003/07/26 19:24:31 salo Exp $");
#endif /* LIBC_SCCS and not lint */
#include "common.c"