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
syscall_get_nr(struct task_struct * task,struct pt_regs * regs)13 static inline int syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
14 {
15 return regs->r2;
16 }
17
syscall_rollback(struct task_struct * task,struct pt_regs * regs)18 static inline void syscall_rollback(struct task_struct *task,
19 struct pt_regs *regs)
20 {
21 regs->r2 = regs->orig_r2;
22 regs->r7 = regs->orig_r7;
23 }
24
syscall_get_error(struct task_struct * task,struct pt_regs * regs)25 static inline long syscall_get_error(struct task_struct *task,
26 struct pt_regs *regs)
27 {
28 return regs->r7 ? regs->r2 : 0;
29 }
30
syscall_get_return_value(struct task_struct * task,struct pt_regs * regs)31 static inline long syscall_get_return_value(struct task_struct *task,
32 struct pt_regs *regs)
33 {
34 return regs->r2;
35 }
36
syscall_set_return_value(struct task_struct * task,struct pt_regs * regs,int error,long val)37 static inline void syscall_set_return_value(struct task_struct *task,
38 struct pt_regs *regs, int error, long val)
39 {
40 if (error) {
41 /* error < 0, but nios2 uses > 0 return value */
42 regs->r2 = -error;
43 regs->r7 = 1;
44 } else {
45 regs->r2 = val;
46 regs->r7 = 0;
47 }
48 }
49
syscall_get_arguments(struct task_struct * task,struct pt_regs * regs,unsigned long * args)50 static inline void syscall_get_arguments(struct task_struct *task,
51 struct pt_regs *regs, unsigned long *args)
52 {
53 *args++ = regs->r4;
54 *args++ = regs->r5;
55 *args++ = regs->r6;
56 *args++ = regs->r7;
57 *args++ = regs->r8;
58 *args = regs->r9;
59 }
60
syscall_set_arguments(struct task_struct * task,struct pt_regs * regs,const unsigned long * args)61 static inline void syscall_set_arguments(struct task_struct *task,
62 struct pt_regs *regs, const unsigned long *args)
63 {
64 regs->r4 = *args++;
65 regs->r5 = *args++;
66 regs->r6 = *args++;
67 regs->r7 = *args++;
68 regs->r8 = *args++;
69 regs->r9 = *args;
70 }
71
syscall_get_arch(struct task_struct * task)72 static inline int syscall_get_arch(struct task_struct *task)
73 {
74 return AUDIT_ARCH_NIOS2;
75 }
76
77 #endif
78
