mirror of https://gitee.com/openkylin/linux.git
113 lines
2.8 KiB
C
113 lines
2.8 KiB
C
/*
|
|
* Copyright (C) 2008-2009 Red Hat, Inc. All rights reserved.
|
|
* Copyright 2010 Tilera Corporation. All Rights Reserved.
|
|
* Copyright 2015 Regents of the University of California, Berkeley
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation, version 2.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* See asm-generic/syscall.h for descriptions of what we must do here.
|
|
*/
|
|
|
|
#ifndef _ASM_RISCV_SYSCALL_H
|
|
#define _ASM_RISCV_SYSCALL_H
|
|
|
|
#include <uapi/linux/audit.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/err.h>
|
|
|
|
/* The array of function pointers for syscalls. */
|
|
extern void *sys_call_table[];
|
|
|
|
/*
|
|
* Only the low 32 bits of orig_r0 are meaningful, so we return int.
|
|
* This importantly ignores the high bits on 64-bit, so comparisons
|
|
* sign-extend the low 32 bits.
|
|
*/
|
|
static inline int syscall_get_nr(struct task_struct *task,
|
|
struct pt_regs *regs)
|
|
{
|
|
return regs->a7;
|
|
}
|
|
|
|
static inline void syscall_set_nr(struct task_struct *task,
|
|
struct pt_regs *regs,
|
|
int sysno)
|
|
{
|
|
regs->a7 = sysno;
|
|
}
|
|
|
|
static inline void syscall_rollback(struct task_struct *task,
|
|
struct pt_regs *regs)
|
|
{
|
|
regs->a0 = regs->orig_a0;
|
|
}
|
|
|
|
static inline long syscall_get_error(struct task_struct *task,
|
|
struct pt_regs *regs)
|
|
{
|
|
unsigned long error = regs->a0;
|
|
|
|
return IS_ERR_VALUE(error) ? error : 0;
|
|
}
|
|
|
|
static inline long syscall_get_return_value(struct task_struct *task,
|
|
struct pt_regs *regs)
|
|
{
|
|
return regs->a0;
|
|
}
|
|
|
|
static inline void syscall_set_return_value(struct task_struct *task,
|
|
struct pt_regs *regs,
|
|
int error, long val)
|
|
{
|
|
regs->a0 = (long) error ?: val;
|
|
}
|
|
|
|
static inline void syscall_get_arguments(struct task_struct *task,
|
|
struct pt_regs *regs,
|
|
unsigned int i, unsigned int n,
|
|
unsigned long *args)
|
|
{
|
|
BUG_ON(i + n > 6);
|
|
if (i == 0) {
|
|
args[0] = regs->orig_a0;
|
|
args++;
|
|
i++;
|
|
n--;
|
|
}
|
|
memcpy(args, ®s->a1 + i * sizeof(regs->a1), n * sizeof(args[0]));
|
|
}
|
|
|
|
static inline void syscall_set_arguments(struct task_struct *task,
|
|
struct pt_regs *regs,
|
|
unsigned int i, unsigned int n,
|
|
const unsigned long *args)
|
|
{
|
|
BUG_ON(i + n > 6);
|
|
if (i == 0) {
|
|
regs->orig_a0 = args[0];
|
|
args++;
|
|
i++;
|
|
n--;
|
|
}
|
|
memcpy(®s->a1 + i * sizeof(regs->a1), args, n * sizeof(regs->a0));
|
|
}
|
|
|
|
static inline int syscall_get_arch(void)
|
|
{
|
|
#ifdef CONFIG_64BIT
|
|
return AUDIT_ARCH_RISCV64;
|
|
#else
|
|
return AUDIT_ARCH_RISCV32;
|
|
#endif
|
|
}
|
|
|
|
#endif /* _ASM_RISCV_SYSCALL_H */
|