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/* Copyright (C) 1996 Free Software Foundation, Inc.
Contributed by Miguel de Icaza (miguel@nuclecu.unam.mx)
FIXME: Currently only 6 parameters can be passsed
to the clone function.
based on code written for the Intel 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 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., 675 Mass Ave,
Cambridge, MA 02139, 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 <asm/unistd.h>
/* int clone(int (*fn)(), void *child_stack, int flags, int nargs, ...) */
.text
.align 4
.globl __libc_clone
.type __libc_clone,@function
.weak clone
__clone = __libc_clone
clone = __libc_clone
__libc_clone:
save %sp,-96,%sp
/* sanity check arguments */
tst %i0
be __clone_syscall_error
tst %i1
be __clone_syscall_error
cmp %i3,0
bl __clone_syscall_error
nop
/* Flush the register windows */
ta 3
/* Parameters for system call */
mov %i1,%o1
mov %i2,%o0
/* parameters that are on the stack for routine */
#define P(x) 0x5c+(x*4)
ld [%fp+P(0)],%o2
ld [%fp+P(1)],%o3
ld [%fp+P(2)],%o4
ld [%fp+P(3)],%o5
/* Do the system call */
set __NR_clone,%g1
ta 0x10
bcs __clone_syscall_error
tst %o1
bne __thread_start
nop
mov %o0,%i0
ret
restore
__clone_syscall_error:
call __errno_location
set EINVAL,%i0
st %i0,[%o0]
mov -1,%i0
ret
restore
__thread_start:
mov %i5,%o1
call %i0
mov %i4,%o0
call _exit,0
nop
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