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/* Copyright (C) 1996, 1997, 1998, 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Richard Henderson (rth@tamu.edu).
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
/* clone() is even more special than fork() as it mucks with stacks
and invokes a function in the right context after its all over. */
#include <asm/errno.h>
#include <sys/syscall.h>
#include "NM_Macros.S"
/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */
.text
.align 2
.globl __clone
.type __clone,@function
__clone:
save %sp,-16
MOVIP %l0, -EINVAL
/* sanity check arguments */
skprnz %i0 /* no NULL function pointers */
br CLONE_ERROR_LABEL
mov %o0, %i2
skprnz %i1 /* no NULL stack pointers */
br CLONE_ERROR_LABEL
mov %o1, %i1
/* Do the system call */
MOVIP %g1, __NR_clone
trap 63
/* if ret >=0? */
cmpi %o0, 0
skps cc_pl
br CLONE_ERROR_LABEL
mov %l0, %o0
/* Start thread */
skprz %o1
br __thread_start
nop
mov %i0, %o0
ret
restore
CLONE_ERROR_LABEL:
neg %l0
MOVIA %g1, __errno_location@h
call %g1
nop
st [%o0], %l0 /* store errno */
xor %i0, %i0
dec %i0 /* retval=-1 */
ret
restore
.size __clone, .-__clone
.type __thread_start,@function
__thread_start:
call %i0
mov %o0, %i3
MOVIA %g1, _exit@h
call %g1
nop
.size __thread_start, .-__thread_start
.weak clone
clone = __clone
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