/* Copyright (C) 1999, 2000 Free Software Foundation, Inc. Copyright (C) 2001 Hewlett-Packard Australia 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 Derived in part from the Linux-8086 C library, the GNU C Library, and several other sundry sources. Files within this library are copyright by their respective copyright holders. */ #include <features.h> #define _SYSCALL_H #include <bits/sysnum.h> #define _ERRNO_H 1 #include <bits/errno.h> #include <bits/sysnum.h> /* Clone the calling process, but without copying the whole address space. The calling process is suspended until the new process exits or is replaced by a call to `execve'. Return -1 for errors, 0 to the new process, and the process ID of the new process to the old process. */ .text .globl __vfork .hidden __vfork .type __vfork,@function .align 4 __vfork: mov.w .L2, r3 trapa #__SH_SYSCALL_TRAP_BASE mov r0, r1 #ifdef __CONFIG_SH2__ // 12 arithmetic shifts for the crappy sh2, because shad doesn't exist! shar r1 shar r1 shar r1 shar r1 shar r1 shar r1 shar r1 shar r1 shar r1 shar r1 shar r1 shar r1 #else mov #-12, r2 shad r2, r1 #endif not r1, r1 // r1=0 means r0 = -1 to -4095 tst r1, r1 // i.e. error in linux bf 2f mov.w .L1, r1 cmp/eq r1, r0 bf/s __syscall_error mov r0, r4 /* If we don't have vfork, use fork. */ mov.w .L3, r3 trapa #__SH_SYSCALL_TRAP_BASE mov r0, r1 #ifdef __CONFIG_SH2__ // 12 arithmetic shifts for the crappy sh2, because shad doesn't exist! shar r1 shar r1 shar r1 shar r1 shar r1 shar r1 shar r1 shar r1 shar r1 shar r1 shar r1 shar r1 #else mov #-12, r2 shad r2, r1 #endif not r1, r1 // r1=0 means r0 = -1 to -4095 tst r1, r1 // i.e. error in linux bt/s __syscall_error mov r0, r4 2: rts nop .align 2 .L1: .word -ENOSYS .L2: .word __NR_vfork .L3: .word __NR_fork .size __vfork, .-__vfork weak_alias(__vfork,vfork) libc_hidden_weak(vfork) #include "syscall_error.S"