40 lines
994 B
C
40 lines
994 B
C
/**
|
|
* \file
|
|
* \brief User space memory access functions.
|
|
*/
|
|
|
|
/*
|
|
* Copyright (c) 2012, ETH Zurich.
|
|
* All rights reserved.
|
|
*
|
|
* This file is distributed under the terms in the attached LICENSE file.
|
|
* If you do not find this file, copies can be found by writing to:
|
|
* ETH Zurich D-INFK, Universitaetstrasse 6, CH-8092 Zurich. Attn: Systems Group.
|
|
*/
|
|
|
|
#ifndef USERACCESS_H
|
|
#define USERACCESS_H
|
|
|
|
/**
|
|
* Type of access to a user space memory region.
|
|
*/
|
|
#define ACCESS_READ 0
|
|
#define ACCESS_WRITE 1
|
|
|
|
/**
|
|
* Check the validity of the user space buffer.
|
|
*
|
|
* \param type Type of access to check: ACCESS_WRITE or ACCESS_READ.
|
|
* \param buffer Pointer to beginning of buffer.
|
|
* \param size Size of buffer.
|
|
*/
|
|
bool access_ok(uint8_t type, lvaddr_t buffer, size_t size);
|
|
|
|
/**
|
|
* Walk page tables to check if we can access region
|
|
* This needs to be implemented for every arch we support
|
|
*/
|
|
bool paging_is_region_valid(lvaddr_t base, size_t npages, uint8_t type);
|
|
|
|
#endif // USER_ACCESS_H
|