| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475 |
- /* Copyright (C) 2005 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/>. */
- /* vfork() is just a special case of clone(). */
- #include <sys/syscall.h>
- #include <sys/asm.h>
- #include <sysdep.h>
- #ifdef __NR_fork
- /* int vfork() */
- .text
- .hidden __vfork
- LOCALSZ= 1
- FRAMESZ= (((NARGSAVE+LOCALSZ)*SZREG)+ALSZ)&ALMASK
- GPOFF= FRAMESZ-(1*SZREG)
- NESTED(__vfork,FRAMESZ,sp)
- #ifdef __PIC__
- SETUP_GP
- #endif
- PTR_SUBU sp, FRAMESZ
- SETUP_GP64 (a5, __vfork)
- #ifdef __PIC__
- SAVE_GP (GPOFF)
- #endif
- PTR_ADDU sp, FRAMESZ
- li a0, 0x4112 /* CLONE_VM | CLONE_VFORK | SIGCHLD */
- move a1, sp
- /* Do the system call */
- li v0,__NR_clone
- syscall
- bnez a3,L(error)
- /* Successful return from the parent or child. */
- RESTORE_GP64
- j ra
- nop
- /* Something bad happened -- no child created. */
- L(error):
- move a0, v0
- #ifdef __PIC__
- PTR_LA t9, __syscall_error
- RESTORE_GP64
- jr t9
- #else
- RESTORE_GP64
- j __syscall_error
- #endif
- END(__vfork)
- weak_alias(__vfork,vfork)
- libc_hidden_def(vfork)
- #endif
|
