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/* $OpenBSD: crt0.c,v 1.4 2013/11/10 19:44:17 guenther Exp $ */
/* $NetBSD: crt0.c,v 1.6 2002/01/01 01:31:06 thorpej 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/param.h>
#include <machine/asm.h>
#include <stdlib.h>
static char *_strrchr(const char *, char);
char **environ;
char * __progname = "";
char __progname_storage[NAME_MAX+1];
#ifdef MCRT0
extern void monstartup(u_long, u_long);
extern void _mcleanup(void);
extern unsigned char _etext, _eprol;
#endif /* MCRT0 */
extern void _start(void);
void ___start(int, char *[], char *[], void (*)(void));
__asm(" .text \n"
" .align 0 \n"
" .globl _start \n"
" .globl __start \n"
"_start: \n"
"__start: \n"
" mov r3, r0 /* cleanup */ \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"
#if 1
" bic sp, sp, #7" /*__STRING(STACKALIGNBYTES)*/ " \n"
#endif
" sub sp, sp, #8 \n"
" str r5, [sp, #4] \n"
" str r4, [sp, #0] \n"
"\n"
" b " __STRING(___start) " ");
/*
" b " __STRING(_C_LABEL(___start)) " ");
*/
void
___start(int argc, char **argv, char **envp, void (*cleanup)(void))
{
char *s;
environ = envp;
if ((__progname = argv[0]) != NULL) { /* NULL ptr if argc = 0 */
if ((__progname = _strrchr(__progname, '/')) == NULL)
__progname = argv[0];
else
__progname++;
for (s = __progname_storage; *__progname &&
s < &__progname_storage[sizeof __progname_storage - 1]; )
*s++ = *__progname++;
*s = '\0';
__progname = __progname_storage;
}
if (cleanup)
atexit(cleanup);
#ifdef MCRT0
atexit(_mcleanup);
monstartup((u_long)&_eprol, (u_long)&_etext);
#endif /* MCRT0 */
#ifndef SCRT0
__init();
#endif
__asm("__callmain:"); /* Defined for the benefit of debuggers */
exit(main(argc, argv, envp));
}
static char *
_strrchr(const char *p, char ch)
{
char *save;
for (save = NULL;; ++p) {
if (*p == ch)
save = (char *)p;
if (!*p)
return(save);
}
/* NOTREACHED */
}
asm (" .section \".text\" \n_eprol:");
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