/* $OpenBSD: unixsys.S,v 1.3 2003/06/03 20:22:12 mickey Exp $ */ /* * Copyright (c) 1997 Michael Shalayeff * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * */ #include #include #define RSYSCALL(x) \ ENTRY(u/**/x); \ movl $(SYS_/**/x), %eax; \ jmp 1f .globl _errno RSYSCALL(open) RSYSCALL(read) RSYSCALL(write) RSYSCALL(ioctl) RSYSCALL(close) RSYSCALL(exit) 1: int $0x80 2: jnc 3f movl %eax, _errno movl $-1, %eax movl $-1, %edx 3: ret ENTRY(__syscall) movl $(SYS___syscall), %eax jmp 1b ENTRY(syscall) popl %ecx /* rta */ popl %eax /* syscall number */ pushl %ecx int $0x80 pushl %ecx jmp 2b