/* vi: set sw=4 ts=4: */ /* vfork for uClibc * * Copyright (C) 2000 by Lineo, inc. and Erik Andersen * Copyright (C) 2000,2001 by Erik Andersen <andersen@uclibc.org> * Written by Erik Andersen <andersen@uclibc.org> * * This program 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. * * This program 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 this program; if not, write to the Free Software Foundation, * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <asm/errno.h> #include <sys/syscall.h> .global errno; .text .global vfork; .type vfork,#function .align 4; \ vfork: #ifdef __NR_vfork swi __NR_vfork cmn r0, #4096 movcc pc, lr /* Check if vfork even exists. */ ldr r1, =-ENOSYS teq r0, r1 bne __syscall_error #endif /* If we don't have vfork, use fork. */ swi __NR_fork cmn r0, #4096 /* Syscal worked. Return to child/parent */ movcc pc, lr __syscall_error: /* Looks like the syscall choked -- set errno */ ldr r3, .L4 /* Calculate the - of the syscall result, in case we need it */ rsb r2, r0, $0 /* errno = -result */ str r2, [r9,r3] /* return -1 */ mvn r0, $0 mov pc, lr .L4: .word errno