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authorDavid Howells <dhowells@redhat.com>2010-12-03 10:59:50 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2010-12-03 12:18:53 -0500
commita9df42e1175d30545ffa1e17a3df1b39c107d33a (patch)
treef6cdb338413ef047a78e7c8aa9f68d18eb47f2f7 /arch/mn10300/include
parent59e57c622c3502346e8f930421ebc482d639520c (diff)
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>
Diffstat (limited to 'arch/mn10300/include')
-rw-r--r--arch/mn10300/include/asm/syscall.h117
1 files changed, 117 insertions, 0 deletions
diff --git a/arch/mn10300/include/asm/syscall.h b/arch/mn10300/include/asm/syscall.h
new file mode 100644
index 000000000000..b44b0bb75a01
--- /dev/null
+++ b/arch/mn10300/include/asm/syscall.h
@@ -0,0 +1,117 @@
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
20extern const unsigned long sys_call_table[];
21
22static inline int syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
23{
24 return regs->orig_d0;
25}
26
27static inline void syscall_rollback(struct task_struct *task,
28 struct pt_regs *regs)
29{
30 regs->d0 = regs->orig_d0;
31}
32
33static 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
40static inline long syscall_get_return_value(struct task_struct *task,
41 struct pt_regs *regs)
42{
43 return regs->d0;
44}
45
46static 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
53static 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
85static 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 */