mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-21 04:31:04 +08:00
60 lines
1.8 KiB
ArmAsm
60 lines
1.8 KiB
ArmAsm
/* Copyright (C) 2000-2014 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 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, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
|
|
#include <sysdep.h>
|
|
#define _SIGNAL_H
|
|
#include <bits/signum.h>
|
|
#include <tcb-offsets.h>
|
|
|
|
/* The following are defined in linux/sched.h, which unfortunately */
|
|
/* is not safe for inclusion in an assembly file. */
|
|
#define CLONE_VM 0x00000100 /* set if VM shared between processes */
|
|
#define CLONE_VFORK 0x00004000 /* set if the parent wants the child to wake it up on mm_release */
|
|
|
|
/* pid_t vfork(void); */
|
|
/* Implemented as __clone_syscall(CLONE_VFORK | CLONE_VM | SIGCHLD, 0) */
|
|
|
|
ENTRY(__vfork)
|
|
.prologue // work around a GAS bug which triggers if
|
|
.body // first .prologue is not at the beginning of proc.
|
|
alloc r2=ar.pfs,0,0,2,0
|
|
adds r14=PID,r13
|
|
;;
|
|
ld4 r16=[r14]
|
|
;;
|
|
sub r15=0,r16
|
|
mov out0=CLONE_VM+CLONE_VFORK+SIGCHLD
|
|
mov out1=0 /* Standard sp value. */
|
|
;;
|
|
st4 [r14]=r15
|
|
DO_CALL (SYS_ify (clone))
|
|
cmp.eq p0,p7=0,r8
|
|
adds r14=PID,r13
|
|
;;
|
|
(p7) ld4 r16=[r14]
|
|
cmp.eq p6,p0=-1,r10
|
|
;;
|
|
(p7) sub r15=0,r16
|
|
;;
|
|
(p7) st4 [r14]=r15
|
|
(p6) br.cond.spnt.few __syscall_error
|
|
ret
|
|
PSEUDO_END(__vfork)
|
|
|
|
weak_alias (__vfork, vfork)
|