minix/lib/csu/arm_elf/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

109 lines
3.4 KiB
C

/* $NetBSD: crt0.c,v 1.7 2008/06/21 00:52:52 gmcgarry Exp $ */
/*
* Copyright (C) 1997 Mark Brinicombe
* Copyright (C) 1995 Wolfgang Solfrank.
* Copyright (C) 1995 TooLs GmbH.
* 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 TooLs GmbH.
* 4. The name of TooLs GmbH may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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 <machine/asm.h>
#include <stdlib.h>
#include "common.h"
extern void _start(void);
void ___start(int, char *[], char *[], struct ps_strings *,
const Obj_Entry *, void (*)(void));
__asm(" .text \n"
" .align 0 \n"
" .globl _start \n"
" .globl __start \n"
"_start: \n"
"__start: \n"
" mov r5, r2 /* cleanup */ \n"
" mov r4, r1 /* obj_main */ \n"
" mov r3, r0 /* ps_strings */ \n"
" /* Get argc, argv, and envp from stack */ \n"
" ldr r0, [sp, #0x0000] \n"
" add r1, sp, #0x0004 \n"
" add r2, r1, r0, lsl #2 \n"
" add r2, r2, #0x0004 \n"
"\n"
" /* Ensure the stack is properly aligned before calling C code. */\n"
" bic sp, sp, #" ___STRING(STACKALIGNBYTES) " \n"
" sub sp, sp, #8 \n"
" str r5, [sp, #4] \n"
" str r4, [sp, #0] \n"
"\n"
" b " ___STRING(_C_LABEL(___start)) " ");
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: crt0.c,v 1.7 2008/06/21 00:52:52 gmcgarry Exp $");
#endif /* LIBC_SCCS and not lint */
void
___start(int argc, char **argv, char **envp, struct ps_strings *ps_strings,
const Obj_Entry *obj, void (*cleanup)(void))
{
char *ap;
environ = envp;
__ps_strings = ps_strings;
if ((ap = argv[0])) {
if ((__progname = _strrchr(ap, '/')) == NULL)
__progname = ap;
else
++__progname;
}
#ifdef DYNAMIC
/* ld(1) convention: if DYNAMIC = 0 then statically linked */
if (&_DYNAMIC)
_rtld_setup(cleanup, obj);
#endif /* DYNAMIC */
#ifdef MCRT0
atexit(_mcleanup);
monstartup((u_long)&_eprol, (u_long)&_etext);
#endif /* MCRT0 */
atexit(_fini);
_init();
__asm("__callmain:"); /* Defined for the benefit of debuggers */
exit(main(argc, argv, envp));
}
#include "common.c"