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/* Copyright (C) 2001 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <asm/errno.h>
#include <sys/syscall.h>
#include <sysdep.h>
/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */
.syntax no_register_prefix
.text
ENTRY (__clone)
/* Sanity check arguments: No NULL function pointers. Allow a NULL
stack pointer though; it makes the kernel allocate stack. */
test.d r10
beq 1f
nop
/* We need to muck with a few registers. */
movem r1,[sp=sp-8]
/* Save the function pointer and argument. We can't save them
onto the new stack since it can be NULL. */
move.d r10,r0
move.d r13,r1
/* Move the other arguments into place for the system call. */
move.d r11,r10
move.d r12,r11
/* Do the system call. */
movu.w SYS_ify (clone),r9
break 13
test.d r10
beq .Lthread_start
nop
/* Jump to error handler if we get (unsigned) -4096 .. 0xffffffff. */
cmps.w -4096,r10
bhs 0f
movem [sp+],r1
/* In parent, successful return. (Avoid using "ret" - it's a macro.) */
Ret
nop
.Lthread_start:
/* Terminate frame pointers here. */
moveq 0,r8
/* I've told you once. */
move.d r1,r10
jsr r0
SETUP_PIC
PLTCALL (_exit)
/* Die horribly. */
test.d [6809]
/* Stop the unstoppable. */
9:
ba 9b
nop
/* Local error handler. */
1:
movs.w -EINVAL,r10
/* Drop through into the ordinary error handler. */
PSEUDO_END (__clone)
.globl clone
clone = __clone
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