minix/lib/csu/powerpc/crt0.c
Ben Gras e83f7ba2c9 switch to netbsd csu
. file- and functionality-compatible with previous situation
          (FreeBSD csu) (with a crt1.o -> crt0.o symlink in /usr/lib)
        . harmonizes source with netbsd
        . harmonizes linker invocation (e.g. clang) with netbsd
        . helpful to get some arm code in there for the arm port project
2012-04-12 13:26:24 +02:00

107 lines
3.6 KiB
C

/* $NetBSD: crt0.c,v 1.26 2006/05/18 17:54:19 christos Exp $ */
/*
* Copyright (c) 1997 Jason R. Thorpe.
* 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"
/*
* Small Data Area designators. If not defined, will show up as being
* at address zero.
*/
extern int _SDA_BASE_[] __weak_reference(_SDA_BASE_);
extern int _SDA2_BASE_[] __weak_reference(_SDA2_BASE_);
/*
* First 5 arguments are specified by the PowerPC SVR4 ABI. The
* last argument, ps_strings, is a NetBSD extension.
*/
void _start(int, char **, char **, const Obj_Entry *,
void (*)(void), struct ps_strings *);
void
_start(int argc, char **argv, char **envp,
const Obj_Entry *obj, /* from shared loader */
void (*cleanup)(void), /* from shared loader */
struct ps_strings *ps_strings) /* NetBSD extension */
{
char *namep;
/*
* Initialize the Small Data Area registers.
* _SDA_BASE is defined in the SVR4 ABI for PPC.
* _SDA2_BASE is defined in the E[mbedded] ABI for PPC.
*/
__asm( "lis %r13,_SDA_BASE_@ha;"
"addi %r13,%r13,_SDA_BASE_@l;"
"lis %r2,_SDA2_BASE_@ha;"
"addi %r2,%r2,_SDA2_BASE_@l" );
if ((namep = argv[0]) != NULL) { /* NULL ptr if argc = 0 */
if ((__progname = _strrchr(namep, '/')) == NULL)
__progname = namep;
else
__progname++;
}
environ = envp;
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 1.26 2006/05/18 17:54:19 christos Exp $");
#endif /* LIBC_SCCS and not lint */
#include "common.c"