1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-only */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright Altera Corporation (C) <2014>. All rights reserved
4*4882a593Smuzhiyun */
5*4882a593Smuzhiyun
6*4882a593Smuzhiyun #ifndef __ASM_NIOS2_SYSCALL_H__
7*4882a593Smuzhiyun #define __ASM_NIOS2_SYSCALL_H__
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun #include <uapi/linux/audit.h>
10*4882a593Smuzhiyun #include <linux/err.h>
11*4882a593Smuzhiyun #include <linux/sched.h>
12*4882a593Smuzhiyun
syscall_get_nr(struct task_struct * task,struct pt_regs * regs)13*4882a593Smuzhiyun static inline int syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
14*4882a593Smuzhiyun {
15*4882a593Smuzhiyun return regs->r2;
16*4882a593Smuzhiyun }
17*4882a593Smuzhiyun
syscall_rollback(struct task_struct * task,struct pt_regs * regs)18*4882a593Smuzhiyun static inline void syscall_rollback(struct task_struct *task,
19*4882a593Smuzhiyun struct pt_regs *regs)
20*4882a593Smuzhiyun {
21*4882a593Smuzhiyun regs->r2 = regs->orig_r2;
22*4882a593Smuzhiyun regs->r7 = regs->orig_r7;
23*4882a593Smuzhiyun }
24*4882a593Smuzhiyun
syscall_get_error(struct task_struct * task,struct pt_regs * regs)25*4882a593Smuzhiyun static inline long syscall_get_error(struct task_struct *task,
26*4882a593Smuzhiyun struct pt_regs *regs)
27*4882a593Smuzhiyun {
28*4882a593Smuzhiyun return regs->r7 ? regs->r2 : 0;
29*4882a593Smuzhiyun }
30*4882a593Smuzhiyun
syscall_get_return_value(struct task_struct * task,struct pt_regs * regs)31*4882a593Smuzhiyun static inline long syscall_get_return_value(struct task_struct *task,
32*4882a593Smuzhiyun struct pt_regs *regs)
33*4882a593Smuzhiyun {
34*4882a593Smuzhiyun return regs->r2;
35*4882a593Smuzhiyun }
36*4882a593Smuzhiyun
syscall_set_return_value(struct task_struct * task,struct pt_regs * regs,int error,long val)37*4882a593Smuzhiyun static inline void syscall_set_return_value(struct task_struct *task,
38*4882a593Smuzhiyun struct pt_regs *regs, int error, long val)
39*4882a593Smuzhiyun {
40*4882a593Smuzhiyun if (error) {
41*4882a593Smuzhiyun /* error < 0, but nios2 uses > 0 return value */
42*4882a593Smuzhiyun regs->r2 = -error;
43*4882a593Smuzhiyun regs->r7 = 1;
44*4882a593Smuzhiyun } else {
45*4882a593Smuzhiyun regs->r2 = val;
46*4882a593Smuzhiyun regs->r7 = 0;
47*4882a593Smuzhiyun }
48*4882a593Smuzhiyun }
49*4882a593Smuzhiyun
syscall_get_arguments(struct task_struct * task,struct pt_regs * regs,unsigned long * args)50*4882a593Smuzhiyun static inline void syscall_get_arguments(struct task_struct *task,
51*4882a593Smuzhiyun struct pt_regs *regs, unsigned long *args)
52*4882a593Smuzhiyun {
53*4882a593Smuzhiyun *args++ = regs->r4;
54*4882a593Smuzhiyun *args++ = regs->r5;
55*4882a593Smuzhiyun *args++ = regs->r6;
56*4882a593Smuzhiyun *args++ = regs->r7;
57*4882a593Smuzhiyun *args++ = regs->r8;
58*4882a593Smuzhiyun *args = regs->r9;
59*4882a593Smuzhiyun }
60*4882a593Smuzhiyun
syscall_set_arguments(struct task_struct * task,struct pt_regs * regs,const unsigned long * args)61*4882a593Smuzhiyun static inline void syscall_set_arguments(struct task_struct *task,
62*4882a593Smuzhiyun struct pt_regs *regs, const unsigned long *args)
63*4882a593Smuzhiyun {
64*4882a593Smuzhiyun regs->r4 = *args++;
65*4882a593Smuzhiyun regs->r5 = *args++;
66*4882a593Smuzhiyun regs->r6 = *args++;
67*4882a593Smuzhiyun regs->r7 = *args++;
68*4882a593Smuzhiyun regs->r8 = *args++;
69*4882a593Smuzhiyun regs->r9 = *args;
70*4882a593Smuzhiyun }
71*4882a593Smuzhiyun
syscall_get_arch(struct task_struct * task)72*4882a593Smuzhiyun static inline int syscall_get_arch(struct task_struct *task)
73*4882a593Smuzhiyun {
74*4882a593Smuzhiyun return AUDIT_ARCH_NIOS2;
75*4882a593Smuzhiyun }
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun #endif
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