f14fb60209
* Updating common/lib * Updating lib/csu * Updating lib/libc * Updating libexec/ld.elf_so * Corrected test on __minix in featuretest to actually follow the meaning of the comment. * Cleaned up _REENTRANT-related defintions. * Disabled -D_REENTRANT for libfetch * Removing some unneeded __NBSD_LIBC defines and tests Change-Id: Ic1394baef74d11b9f86b312f5ff4bbc3cbf72ce2
139 lines
4.5 KiB
C
139 lines
4.5 KiB
C
/* $NetBSD: crt0.c,v 1.10 2011/03/07 05:09:10 joerg Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 2002 Matt Fredette
|
|
* Copyright (c) 1999 Klaus Klein
|
|
* 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"
|
|
|
|
static void ___start(struct ps_strings *,
|
|
void (*cleanup)(void), const Obj_Entry *, int)
|
|
#ifdef __GNUC__
|
|
__attribute__((__used__))
|
|
#endif
|
|
;
|
|
|
|
__asm("\n"
|
|
" .text \n"
|
|
" .align 4 \n"
|
|
" .globl _start \n"
|
|
" .globl __start \n"
|
|
" .type _start,@function \n"
|
|
" .type __start,@function \n"
|
|
"_start: \n"
|
|
"__start: \n"
|
|
" .import _GLOBAL_OFFSET_TABLE_ \n"
|
|
"\n"
|
|
" bl L$lpc, %r27 \n"
|
|
" depi 0, 31, 2, %r27 \n"
|
|
"L$lpc: addil L'_GLOBAL_OFFSET_TABLE_ - ($PIC_pcrel$0 - 8), %r27 \n"
|
|
" ldo R'_GLOBAL_OFFSET_TABLE_ - ($PIC_pcrel$0 - 12)(%r1),%r27 \n"
|
|
" copy %r27, %r19 \n"
|
|
" b ___start \n"
|
|
" copy %r27, %arg3 \n");
|
|
|
|
static void
|
|
___start(struct ps_strings *ps_strings,
|
|
void (*cleanup)(void), /* from shared loader */
|
|
const Obj_Entry *obj, /* from shared loader */
|
|
int dp)
|
|
{
|
|
int argc;
|
|
char **argv;
|
|
int fini_plabel[2];
|
|
|
|
argc = ps_strings->ps_nargvstr;
|
|
argv = ps_strings->ps_argvstr;
|
|
environ = ps_strings->ps_envstr;
|
|
|
|
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 (&rtld_DYNAMIC != NULL)
|
|
_rtld_setup(cleanup, obj);
|
|
#endif
|
|
|
|
_libc_init();
|
|
|
|
#ifdef MCRT0
|
|
atexit(_mcleanup);
|
|
monstartup((u_long)&_eprol, (u_long)&_etext);
|
|
#endif
|
|
|
|
/*
|
|
* Since crt0.o, crtbegin.o, and crtend.o are always
|
|
* compiled PIC, they must have %r19 set correctly on
|
|
* entry to any function they contain. However, when
|
|
* a program is linked statically, the linker does
|
|
* not fill a PLABEL relocation with a pointer to a
|
|
* true PLABEL, it just fills it with the offset of the
|
|
* function. This shows the linker's assumption that
|
|
* when linking statically, *all* of the code has *not*
|
|
* been compiled PIC. I guess to assume otherwise
|
|
* would be a performance hit, as you would end up
|
|
* with unnecessary PLABELs for function pointers.
|
|
*
|
|
* But here, passing the address of the PIC _fini to
|
|
* atexit, we must make sure that we pass a PLABEL.
|
|
*/
|
|
fini_plabel[0] = (int)_fini;
|
|
if (fini_plabel[0] & 2)
|
|
/* _fini is already a PLABEL. */
|
|
atexit(_fini);
|
|
else {
|
|
fini_plabel[1] = dp;
|
|
atexit((void (*)(void))(((int)fini_plabel) | 2));
|
|
}
|
|
_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 1.10 2011/03/07 05:09:10 joerg Exp $");
|
|
#endif /* LIBC_SCCS and not lint */
|
|
|
|
#include "common.c"
|