| /* Copyright (C) 2000, 2002, 2004 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, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| |
| #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 |
| cmp.eq p6,p0=0,r16 |
| ;; |
| (p6) movl r15=0x80000000 |
| mov out0=CLONE_VM+CLONE_VFORK+SIGCHLD |
| mov out1=0 /* Standard sp value. */ |
| ;; |
| st4 [r14]=r15 |
| DO_CALL (SYS_ify (clone)) |
| cmp.eq p6,p0=0,r8 |
| adds r14=PID,r13 |
| (p6) br.cond.dptk 1f |
| ;; |
| ld4 r15=[r14] |
| ;; |
| extr.u r16=r15,0,31 |
| ;; |
| cmp.eq p0,p6=0,r16 |
| ;; |
| (p6) sub r16=0,r15 |
| ;; |
| st4 [r14]=r16 |
| 1: |
| cmp.eq p6,p0=-1,r10 |
| (p6) br.cond.spnt.few __syscall_error |
| ret |
| PSEUDO_END(__vfork) |
| libc_hidden_def (__vfork) |
| weak_alias (__vfork, vfork) |
