NetBSD/lib/csu/arm32/crt0.c

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/* $NetBSD: crt0.c,v 1.10 2001/02/18 23:03:34 simonb Exp $ */
1996-10-18 09:36:42 +04:00
/*
* 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 <stdlib.h>
#include "common.h"
#undef mmap
#define mmap(addr, len, prot, flags, fd, off) \
__syscall(SYS_mmap, (addr), (len), (prot), (flags), \
1999-07-02 19:46:05 +04:00
(fd), 0, (off_t)(off))
extern void start(void) asm("start");
void __start(int, char *[], char *[]);
__asm("
.text
.align 0
.global start
start:
/* Get ps_strings pointer from kernel */
teq r10, #0
ldr r3, Lps_strings
movne r0, #0
str r0, [r3]
/* Get argc, argv, and envp from stack */
ldr r0, [sp, #0x0000]
add r1, sp, #0x0004
add r2, r1, r0, lsl #2
add r2, r2, #0x0004
b " ___STRING(_C_LABEL(__start)) "
.align 0
Lps_strings:
.word " ___STRING(_C_LABEL(__ps_strings)) "
");
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: crt0.c,v 1.10 2001/02/18 23:03:34 simonb Exp $");
#endif /* LIBC_SCCS and not lint */
void
__start(int argc, char **argv, char **envp)
{
char *ap;
environ = envp;
if ((ap = argv[0]))
if ((__progname = _strrchr(ap, '/')) == NULL)
__progname = ap;
else
++__progname;
#ifdef DYNAMIC
/* ld(1) convention: if DYNAMIC = 0 then statically linked */
#ifdef stupid_gcc
if (&_DYNAMIC)
#else
if ( ({volatile caddr_t x = (caddr_t)&_DYNAMIC; x; }) )
#endif
__load_rtld(&_DYNAMIC);
#endif /* DYNAMIC */
#ifdef MCRT0
atexit(_mcleanup);
monstartup((u_long)&eprol, (u_long)&etext);
#endif /* MCRT0 */
__asm("__callmain:"); /* Defined for the benefit of debuggers */
exit(main(argc, argv, envp));
}
#ifndef ntohl
inline in_addr_t
__crt0_swap(x)
in_addr_t x;
{
#if BYTE_ORDER == LITTLE_ENDIAN
return( ((x & 0x000000ff) << 24)
| ((x & 0x0000ff00) << 8)
| ((x & 0x00ff0000) >> 8)
| ((x & 0xff000000) >> 24));
#else
return x;
#endif /* BYTE_ORDER */
}
#define ntohl(x) __crt0_swap(x)
#define htonl(x) __crt0_swap(x)
#endif /* ntohl */
#ifdef DYNAMIC
__asm("
.text
.align 0
___syscall:
swi 0
mvncs r0, #0
mov pc, lr
");
#endif /* DYNAMIC */
#include "common.c"
#ifdef MCRT0
__asm("
.text
.align 0
eprol:
");
#endif /* MCRT0 */