mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-11 13:50:06 +00:00
83 lines
2.3 KiB
ArmAsm
83 lines
2.3 KiB
ArmAsm
/* Copyright (C) 1996, 1997, 2000 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by David Huggins-Daines <dhd@debian.org>, 2000.
|
|
Based on the Alpha version by Richard Henderson <rth@tamu.edu>, 1996.
|
|
|
|
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/unistd.h>
|
|
#include <sysdep.h>
|
|
#define _ERRNO_H 1
|
|
#include <bits/errno.h>
|
|
|
|
/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg) */
|
|
|
|
.text
|
|
ENTRY(__clone)
|
|
/* FIXME: I have no idea how profiling works on hppa. */
|
|
|
|
/* Sanity check arguments. */
|
|
comib,<> 0,%arg0,.Lerror /* no NULL function pointers */
|
|
ldi EINVAL,%ret0
|
|
comib,<> 0,%arg1,.Lerror /* no NULL stack pointers */
|
|
nop
|
|
|
|
/* Save the fn ptr and arg on the new stack. */
|
|
stwm %arg3,64(%arg1)
|
|
stw %arg3,-60(%arg1)
|
|
|
|
/* Do the system call */
|
|
copy %arg2,%arg0
|
|
ble 0x100(%sr7,%r0)
|
|
ldi __NR_clone,%r20
|
|
|
|
ldi -4096,%r1
|
|
comclr,>>= %r1,%ret0,%r0 /* Note: unsigned compare. */
|
|
b,n .Lerror
|
|
|
|
comib,=,n 0,%ret0,thread_start
|
|
|
|
/* Successful return from the parent */
|
|
bv %r0(%rp)
|
|
nop
|
|
|
|
/* Something bad happened -- no child created */
|
|
.Lerror:
|
|
b __syscall_error
|
|
nop
|
|
|
|
thread_start:
|
|
/* Load up the arguments. */
|
|
ldw -60(%sp),%arg0
|
|
ldwm -64(%sp),%r22
|
|
|
|
/* Call the user's function */
|
|
bl $$dyncall,%r31
|
|
copy %r31,%rp
|
|
|
|
bl _exit,%rp
|
|
copy %ret0,%arg0
|
|
|
|
/* Die horribly. */
|
|
iitlbp %r0,(%r0)
|
|
|
|
PSEUDO_END(__clone)
|
|
|
|
weak_alias(__clone, clone)
|