Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
MN10300: Implement asm/syscall.h
Implement asm/syscall.h for the MN10300 arch.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
authored by David Howells and committed by Linus Torvalds a9df42e1 59e57c62
+117
arch/mn10300/include/asm/syscall.h
+117
arch/mn10300/include/asm/syscall.h
···
···
1
+
/* Access to user system call parameters and results
2
+
*
3
+
* See asm-generic/syscall.h for function descriptions.
4
+
*
5
+
* Copyright (C) 2010 Red Hat, Inc. All Rights Reserved.
6
+
* Written by David Howells (dhowells@redhat.com)
7
+
*
8
+
* This program is free software; you can redistribute it and/or
9
+
* modify it under the terms of the GNU General Public Licence
10
+
* as published by the Free Software Foundation; either version
11
+
* 2 of the Licence, or (at your option) any later version.
12
+
*/
13
+
14
+
#ifndef _ASM_SYSCALL_H
15
+
#define _ASM_SYSCALL_H
16
+
17
+
#include <linux/sched.h>
18
+
#include <linux/err.h>
19
+
20
+
extern const unsigned long sys_call_table[];
21
+
22
+
static inline int syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
23
+
{
24
+
return regs->orig_d0;
25
+
}
26
+
27
+
static inline void syscall_rollback(struct task_struct *task,
28
+
struct pt_regs *regs)
29
+
{
30
+
regs->d0 = regs->orig_d0;
31
+
}
32
+
33
+
static inline long syscall_get_error(struct task_struct *task,
34
+
struct pt_regs *regs)
35
+
{
36
+
unsigned long error = regs->d0;
37
+
return IS_ERR_VALUE(error) ? error : 0;
38
+
}
39
+
40
+
static inline long syscall_get_return_value(struct task_struct *task,
41
+
struct pt_regs *regs)
42
+
{
43
+
return regs->d0;
44
+
}
45
+
46
+
static inline void syscall_set_return_value(struct task_struct *task,
47
+
struct pt_regs *regs,
48
+
int error, long val)
49
+
{
50
+
regs->d0 = (long) error ?: val;
51
+
}
52
+
53
+
static inline void syscall_get_arguments(struct task_struct *task,
54
+
struct pt_regs *regs,
55
+
unsigned int i, unsigned int n,
56
+
unsigned long *args)
57
+
{
58
+
switch (i) {
59
+
case 0:
60
+
if (!n--) break;
61
+
*args++ = regs->a0;
62
+
case 1:
63
+
if (!n--) break;
64
+
*args++ = regs->d1;
65
+
case 2:
66
+
if (!n--) break;
67
+
*args++ = regs->a3;
68
+
case 3:
69
+
if (!n--) break;
70
+
*args++ = regs->a2;
71
+
case 4:
72
+
if (!n--) break;
73
+
*args++ = regs->d3;
74
+
case 5:
75
+
if (!n--) break;
76
+
*args++ = regs->d2;
77
+
case 6:
78
+
if (!n--) break;
79
+
default:
80
+
BUG();
81
+
break;
82
+
}
83
+
}
84
+
85
+
static inline void syscall_set_arguments(struct task_struct *task,
86
+
struct pt_regs *regs,
87
+
unsigned int i, unsigned int n,
88
+
const unsigned long *args)
89
+
{
90
+
switch (i) {
91
+
case 0:
92
+
if (!n--) break;
93
+
regs->a0 = *args++;
94
+
case 1:
95
+
if (!n--) break;
96
+
regs->d1 = *args++;
97
+
case 2:
98
+
if (!n--) break;
99
+
regs->a3 = *args++;
100
+
case 3:
101
+
if (!n--) break;
102
+
regs->a2 = *args++;
103
+
case 4:
104
+
if (!n--) break;
105
+
regs->d3 = *args++;
106
+
case 5:
107
+
if (!n--) break;
108
+
regs->d2 = *args++;
109
+
case 6:
110
+
if (!n--) break;
111
+
default:
112
+
BUG();
113
+
break;
114
+
}
115
+
}
116
+
117
+
#endif /* _ASM_SYSCALL_H */