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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2001 - 2007 Tensilica Inc.
* Copyright (C) 2018 Cadence Design Systems Inc.
*/
#ifndef _ASM_SYSCALL_H
#define _ASM_SYSCALL_H
#include <linux/err.h>
#include <asm/ptrace.h>
#include <uapi/linux/audit.h>
static inline int syscall_get_arch(struct task_struct *task)
{
return AUDIT_ARCH_XTENSA;
}
typedef void (*syscall_t)(void);
extern syscall_t sys_call_table[];
static inline long syscall_get_nr(struct task_struct *task,
struct pt_regs *regs)
{
return regs->syscall;
}
static inline void syscall_rollback(struct task_struct *task,
struct pt_regs *regs)
{
/* Do nothing. */
}
static inline long syscall_get_error(struct task_struct *task,
struct pt_regs *regs)
{
/* 0 if syscall succeeded, otherwise -Errorcode */
return IS_ERR_VALUE(regs->areg[2]) ? regs->areg[2] : 0;
}
static inline long syscall_get_return_value(struct task_struct *task,
struct pt_regs *regs)
{
return regs->areg[2];
}
static inline void syscall_set_return_value(struct task_struct *task,
struct pt_regs *regs,
int error, long val)
{
regs->areg[2] = (long) error ? error : val;
}
#define SYSCALL_MAX_ARGS 6
#define XTENSA_SYSCALL_ARGUMENT_REGS {6, 3, 4, 5, 8, 9}
static inline void syscall_get_arguments(struct task_struct *task,
struct pt_regs *regs,
unsigned long *args)
{
static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS;
unsigned int i;
for (i = 0; i < 6; ++i)
args[i] = regs->areg[reg[i]];
}
static inline void syscall_set_arguments(struct task_struct *task,
struct pt_regs *regs,
const unsigned long *args)
{
static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS;
unsigned int i;
for (i = 0; i < 6; ++i)
regs->areg[reg[i]] = args[i];
}
asmlinkage long xtensa_rt_sigreturn(void);
asmlinkage long xtensa_shmat(int, char __user *, int);
asmlinkage long xtensa_fadvise64_64(int, int,
unsigned long long, unsigned long long);
#endif