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/* Copyright (C) 1997, 2000 Free Software Foundation, Inc.
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 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. */
/* 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 *arg), void *child_stack, int flags, void *arg); */
.text
.align 4
.globl __clone
.type __clone,@function
__clone:
save %sp, -192, %sp
/* sanity check arguments */
brz,pn %i0, 99f
mov %i0, %l0 /* save fn */
brz,pn %i1, 99f
mov %i3, %l3 /* save arg */
/* Do the system call */
mov %i1, %o1
mov %i2, %o0
set __NR_clone, %g1
ta 0x6d
bcs,pn %xcc, 99f
nop
brnz,pn %o1, __thread_start
mov %o0, %i0
ret
restore
99:
#ifndef _LIBC_REENTRANT
#ifdef PIC
call 1f
sethi %hi(_GLOBAL_OFFSET_TABLE_-(99b-.)), %l7
1: or %l7, %lo(_GLOBAL_OFFSET_TABLE_-(99b-.)), %l7
add %l7, %o7, %l7
set EINVAL, %i0
sethi %hi(errno), %g2
or %g2, %lo(errno), %g2
st %i0, [%l7+%g2]
#else
sethi %hi(errno), %g2
set EINVAL, %i0
st %i0, [%g2+%lo(errno)]
#endif
#else
call __errno_location
nop
st %i0, [%o0]
#endif
ret
restore %g0,-1,%o0
.size __clone, .-__clone
.type __thread_start,@function
__thread_start:
mov %g0, %fp /* terminate backtrace */
sub %sp, 6*8, %sp /* provide arg storage */
call %l0
mov %l3,%o0
call _exit,0
nop
.size __thread_start, .-__thread_start
weak_alias(__clone, clone)
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