/* 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, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ /* vfork() is just a special case of clone(). */ #include <sys/syscall.h> #include <sys/asm.h> #include <sysdep.h> #ifndef SAVE_PID #define SAVE_PID #endif #ifndef RESTORE_PID #define RESTORE_PID #endif #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 #ifdef PROF # if (_MIPS_SIM != _ABIO32) PTR_S a5, GPOFF(sp) # endif .set noat move $1, ra # if (_MIPS_SIM == _ABIO32) subu sp,sp,8 # endif jal _mcount .set at # if (_MIPS_SIM != _ABIO32) PTR_L a5, GPOFF(sp) # endif #endif PTR_ADDU sp, FRAMESZ SAVE_PID li a0, 0x4112 /* CLONE_VM | CLONE_VFORK | SIGCHLD */ move a1, sp /* Do the system call */ li v0,__NR_clone syscall RESTORE_PID 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