Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright Altera Corporation (C) <2014>. All rights reserved
4 */
5
6#ifndef __ASM_NIOS2_SYSCALL_H__
7#define __ASM_NIOS2_SYSCALL_H__
8
9#include <uapi/linux/audit.h>
10#include <linux/err.h>
11#include <linux/sched.h>
12
13static inline int syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
14{
15 return regs->r2;
16}
17
18static inline void syscall_set_nr(struct task_struct *task, struct pt_regs *regs, int nr)
19{
20 regs->r2 = nr;
21}
22
23static inline void syscall_rollback(struct task_struct *task,
24 struct pt_regs *regs)
25{
26 regs->r2 = regs->orig_r2;
27 regs->r7 = regs->orig_r7;
28}
29
30static inline long syscall_get_error(struct task_struct *task,
31 struct pt_regs *regs)
32{
33 return regs->r7 ? regs->r2 : 0;
34}
35
36static inline long syscall_get_return_value(struct task_struct *task,
37 struct pt_regs *regs)
38{
39 return regs->r2;
40}
41
42static inline void syscall_set_return_value(struct task_struct *task,
43 struct pt_regs *regs, int error, long val)
44{
45 if (error) {
46 /* error < 0, but nios2 uses > 0 return value */
47 regs->r2 = -error;
48 regs->r7 = 1;
49 } else {
50 regs->r2 = val;
51 regs->r7 = 0;
52 }
53}
54
55static inline void syscall_get_arguments(struct task_struct *task,
56 struct pt_regs *regs, unsigned long *args)
57{
58 *args++ = regs->r4;
59 *args++ = regs->r5;
60 *args++ = regs->r6;
61 *args++ = regs->r7;
62 *args++ = regs->r8;
63 *args = regs->r9;
64}
65
66static inline void syscall_set_arguments(struct task_struct *task,
67 struct pt_regs *regs, const unsigned long *args)
68{
69 regs->r4 = *args++;
70 regs->r5 = *args++;
71 regs->r6 = *args++;
72 regs->r7 = *args++;
73 regs->r8 = *args++;
74 regs->r9 = *args;
75}
76
77static inline int syscall_get_arch(struct task_struct *task)
78{
79 return AUDIT_ARCH_NIOS2;
80}
81
82#endif