b6cbf7203b
This patch imports the unmodified current version of NetBSD libc. The NetBSD includes are in /nbsd_include, while the libc code itself is split between lib/nbsd_libc and common/lib/libc.
93 lines
2.6 KiB
ArmAsm
93 lines
2.6 KiB
ArmAsm
/* $NetBSD: __clone.S,v 1.6 2006/04/24 19:00:30 snj Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 2001 Christopher Gilbert
|
|
* All rights reserved.
|
|
*
|
|
* 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. The name of the company nor the name of the author may 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 OR CONTRIBUTORS 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 <machine/asm.h>
|
|
#include <sys/errno.h>
|
|
#include "SYS.h"
|
|
|
|
#ifdef WEAK_ALIAS
|
|
WEAK_ALIAS(clone, __clone)
|
|
#endif
|
|
|
|
/*
|
|
* int __clone(int (*fn)(void *), void *stack, int flags, void *arg);
|
|
*/
|
|
ENTRY(__clone)
|
|
|
|
/* test stack and function are not null */
|
|
teq r0, #0x00
|
|
teqne r1, #0x00
|
|
beq .Leinval
|
|
|
|
/* place the func and its arg onto the child's stack */
|
|
stmfd r1!, {r0, r3}
|
|
|
|
/* syscall expects (flags, stack) */
|
|
mov r0, r2
|
|
|
|
SYSTRAP(__clone)
|
|
bcs PIC_SYM(CERROR, PLT)
|
|
|
|
/*
|
|
* r1 and r0 are the same as from fork:
|
|
* r1 == 0 in parent process, r1 == 1 in child process.
|
|
* r0 == pid of child in parent, r0 == pid of parent in child.
|
|
*/
|
|
teq r1, #0x00
|
|
|
|
/* if this is the parent then just return the pid */
|
|
RETc(eq)
|
|
/*
|
|
* This is the child
|
|
* load the function and arg off the stack
|
|
*/
|
|
ldmfd sp!, {r1, r2}
|
|
|
|
/* setup return address */
|
|
add lr, pc, #.Lreturnhere - . - 8
|
|
|
|
/* place arg in r0 */
|
|
mov r0, r2
|
|
|
|
/* call the function */
|
|
#ifdef _ARM_ARCH_4T
|
|
bx r1
|
|
#else
|
|
mov pc, r1
|
|
#endif
|
|
|
|
.Lreturnhere:
|
|
/* call _exit with the returned value */
|
|
b PIC_SYM(_C_LABEL(_exit), PLT)
|
|
|
|
/* NOTREACHED */
|
|
|
|
/* error handler if func or stack is NULL */
|
|
.Leinval:
|
|
mov R0, #EINVAL
|
|
b PIC_SYM(CERROR, PLT)
|