Annotation of sys/arch/i386/stand/libsa/unixsys.S, Revision 1.1.1.1
1.1 nbrk 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
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