1 /* $OpenBSD: unixsys.S,v 1.4 2004/01/13 23:54:07 millert Exp $ */
2
3 /*
4 * Copyright (c) 1997 Michael Shalayeff
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 */
29
30 #include <machine/asm.h>
31 #include <sys/syscall.h>
32
33
34 #ifdef __STDC__
35 #define RSYSCALL(x) \
36 ENTRY(u##x); \
37 movl $(SYS_##x), %eax; \
38 jmp 1f
39 #else
40 #define RSYSCALL(x) \
41 ENTRY(u/**/x); \
42 movl $(SYS_/**/x), %eax; \
43 jmp 1f
44 #endif
45
46 .globl _errno
47
48 RSYSCALL(open)
49 RSYSCALL(read)
50 RSYSCALL(write)
51 RSYSCALL(ioctl)
52 RSYSCALL(close)
53 RSYSCALL(exit)
54
55 1:
56 int $0x80
57 2: jnc 3f
58 movl %eax, _errno
59 movl $-1, %eax
60 movl $-1, %edx
61 3: ret
62
63 ENTRY(__syscall)
64 movl $(SYS___syscall), %eax
65 jmp 1b
66
67 ENTRY(syscall)
68 popl %ecx /* rta */
69 popl %eax /* syscall number */
70 pushl %ecx
71 int $0x80
72 pushl %ecx
73 jmp 2b