1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
/* ==== syscall.S ============================================================
* Copyright (c) 1993 by Chris Provenzano, proven@mit.edu
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Chris Provenzano.
* 4. The name of Chris Provenzano may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY CHRIS PROVENZANO ``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 CHRIS PROVENZANO 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.
*
* Description : Machine dependent syscalls for decstation with r2000/r3000
*
* 1.00 93/08/14 proven
* -Started coding this file.
*/
.text
.ascii "$Id$";
#include <syscall.h>
#include <machine/regdef.h>
#define SYSCALL(x) \
\
.globl machdep_sys_##x; \
.ent machdep_sys_##x; \
\
machdep_sys_##x:; \
\
.frame sp,0,ra; /* No frame, return address in ra */ \
\
li v0,SYS_##x; /* Load syscall # into v0 */ \
syscall; \
bne a3,zero,machdep_error; /* Error if a3 != 0 */ \
j ra; \
\
.end machdep_sys_##x
/*
* Initial asm stuff for all functions.
*/
.text
.align 2
/* ==========================================================================
* error code for all syscalls. The error value is returned as the negative
* of the errno value. Eventually I want to load the errno value directly
* into pthread_run->error but until then ...
*/
machdep_error:
negu v0, v0 /* Return negative of errno value. */
j ra
#define XSYSCALL(NAME) SYSCALL(NAME)
XSYSCALL(SYSCALL_NAME)
|
