NetBSD/lib/csu/sparc64/crt0.c

150 lines
4.3 KiB
C

/* $NetBSD: crt0.c,v 1.16 2000/07/26 15:40:07 mycroft Exp $ */
/*
* 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"
/*
* __start needs to gather up argc, argv, env_p, ps_strings, the termination
* routine passed in %g1 and call ___start to finish up the startup processing.
*
* NB: We are violating the ELF spec by passing a pointer to the ps strings in
* %g1 instead of a termination routine.
*/
__asm__("
.data
__data_start: ! Start of data section
.text
.align 4
.global start
.global _start
.global __start
start:
_start:
__start:
setx __data_start, %o0, %g4 ! Point %g4 to start of data section
clr %g4 ! egcs thinks this is zero. XXX
clr %fp
add %sp, 8*16 + 0x7ff, %o0 ! start of stack
mov %g1, %o1 ! Cleanup routine
mov %g3, %o1 ! XXXX our rtld uses %g3
mov %g2, %o2 ! XXXX obj from rtld.
ba,pt %icc, ___start ! XXXX jump over the retl egcs 2.96 inserts
mov %g1, %o3 ! ps_strings XXXX
");
void ___start __P((char **, void (*cleanup) __P((void)), const Obj_Entry *,
struct ps_strings *));
void
___start(sp, cleanup, obj, ps_strings)
char **sp;
void (*cleanup) __P((void)); /* from shared loader */
const Obj_Entry *obj; /* from shared loader */
struct ps_strings *ps_strings;
{
long argc;
char **argv, *namep;
argc = *(long *)sp;
#ifdef __sparc_v9__
/* XXX Temporary hack for argc format conversion. */
argc = (argc >> 32) | (argc & 0xffffffff);
#endif
argv = sp + 1;
environ = sp + 2 + argc; /* 2: argc + NULL ending argv */
if ((namep = argv[0]) != NULL) { /* NULL ptr if argc = 0 */
if ((__progname = _strrchr(namep, '/')) == NULL)
__progname = namep;
else
__progname++;
}
if (ps_strings != (struct ps_strings *)0 &&
ps_strings != (struct ps_strings *)0xbabefacedeadbeef)
__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 1.16 2000/07/26 15:40:07 mycroft Exp $");
#endif /* LIBC_SCCS and not lint */
/* XXX XXX XXX THIS SHOULD GO AWAY XXX XXX XXX
* The following allows linking w/o crtbegin.o and crtend.o
*/
extern void __init __P((void));
extern void __fini __P((void));
#ifdef __weak_alias
__weak_alias(_init, __init);
__weak_alias(_fini, __fini);
#else
asm (" .weak _init; _init = __init");
asm (" .weak _fini; _fini = __fini");
#endif
void
__init()
{
}
void
__fini()
{
}
#include "common.c"