NetBSD/lib/csu/arm32/crt0.c

135 lines
3.5 KiB
C

/* $NetBSD: crt0.c,v 1.5 1998/03/10 22:32:08 mark 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 <stdlib.h>
#include "common.h"
#undef mmap
#define mmap(addr, len, prot, flags, fd, off) \
__syscall(SYS_mmap, (addr), (len), (prot), (flags), \
(fd), 0, (off_t)(off))
extern void start __P((void)) asm("start");
void
start(void)
{
struct kframe {
int kargc;
char *kargv[1]; /* size depends on kargc */
char kargstr[1]; /* size varies */
char kenvstr[1]; /* size varies */
};
/*
* ALL REGISTER VARIABLES!!!
*/
struct kframe *kfp;
char **targv;
char **argv;
int *ptr;
/* just above the saved frame pointer */
__asm("mov %0, ip" : "=r" (kfp) );
for (argv = targv = &kfp->kargv[0]; *targv++; /* void */)
/* void */ ;
if (targv >= (char **)(*argv))
--targv;
environ = targv;
if (argv[0])
if ((__progname = _strrchr(argv[0], '/')) == NULL)
__progname = argv[0];
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(kfp->kargc, argv, environ));
}
#ifndef ntohl
inline in_addr_t
ntohl(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 */
}
#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 */