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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright Altera Corporation (C) <2014>. All rights reserved
*/
#ifndef __ASM_NIOS2_SYSCALL_H__
#define __ASM_NIOS2_SYSCALL_H__
#include <uapi/linux/audit.h>
#include <linux/err.h>
#include <linux/sched.h>
static inline int syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
{
return regs->r2;
}
static inline void syscall_rollback(struct task_struct *task,
struct pt_regs *regs)
{
regs->r2 = regs->orig_r2;
regs->r7 = regs->orig_r7;
}
static inline long syscall_get_error(struct task_struct *task,
struct pt_regs *regs)
{
return regs->r7 ? regs->r2 : 0;
}
static inline long syscall_get_return_value(struct task_struct *task,
struct pt_regs *regs)
{
return regs->r2;
}
static inline void syscall_set_return_value(struct task_struct *task,
struct pt_regs *regs, int error, long val)
{
if (error) {
/* error < 0, but nios2 uses > 0 return value */
regs->r2 = -error;
regs->r7 = 1;
} else {
regs->r2 = val;
regs->r7 = 0;
}
}
static inline void syscall_get_arguments(struct task_struct *task,
struct pt_regs *regs, unsigned long *args)
{
*args++ = regs->r4;
*args++ = regs->r5;
*args++ = regs->r6;
*args++ = regs->r7;
*args++ = regs->r8;
*args = regs->r9;
}
static inline void syscall_set_arguments(struct task_struct *task,
struct pt_regs *regs, const unsigned long *args)
{
regs->r4 = *args++;
regs->r5 = *args++;
regs->r6 = *args++;
regs->r7 = *args++;
regs->r8 = *args++;
regs->r9 = *args;
}
static inline int syscall_get_arch(struct task_struct *task)
{
return AUDIT_ARCH_NIOS2;
}
#endif