1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
126 lines
3.5 KiB
C
126 lines
3.5 KiB
C
/*
|
|
* Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
|
|
* Licensed under the GPL
|
|
*/
|
|
|
|
#ifndef __ARCH_UM_UACCESS_H
|
|
#define __ARCH_UM_UACCESS_H
|
|
|
|
#include "linux/config.h"
|
|
#include "choose-mode.h"
|
|
|
|
#ifdef CONFIG_MODE_TT
|
|
#include "uaccess-tt.h"
|
|
#endif
|
|
|
|
#ifdef CONFIG_MODE_SKAS
|
|
#include "uaccess-skas.h"
|
|
#endif
|
|
|
|
#define access_ok(type, addr, size) \
|
|
CHOOSE_MODE_PROC(access_ok_tt, access_ok_skas, type, addr, size)
|
|
|
|
/* this function will go away soon - use access_ok() instead */
|
|
static inline int __deprecated verify_area(int type, const void __user *addr, unsigned long size)
|
|
{
|
|
return (CHOOSE_MODE_PROC(verify_area_tt, verify_area_skas, type, addr,
|
|
size));
|
|
}
|
|
|
|
static inline int copy_from_user(void *to, const void __user *from, int n)
|
|
{
|
|
return(CHOOSE_MODE_PROC(copy_from_user_tt, copy_from_user_skas, to,
|
|
from, n));
|
|
}
|
|
|
|
static inline int copy_to_user(void __user *to, const void *from, int n)
|
|
{
|
|
return(CHOOSE_MODE_PROC(copy_to_user_tt, copy_to_user_skas, to,
|
|
from, n));
|
|
}
|
|
|
|
/*
|
|
* strncpy_from_user: - Copy a NUL terminated string from userspace.
|
|
* @dst: Destination address, in kernel space. This buffer must be at
|
|
* least @count bytes long.
|
|
* @src: Source address, in user space.
|
|
* @count: Maximum number of bytes to copy, including the trailing NUL.
|
|
*
|
|
* Copies a NUL-terminated string from userspace to kernel space.
|
|
*
|
|
* On success, returns the length of the string (not including the trailing
|
|
* NUL).
|
|
*
|
|
* If access to userspace fails, returns -EFAULT (some data may have been
|
|
* copied).
|
|
*
|
|
* If @count is smaller than the length of the string, copies @count bytes
|
|
* and returns @count.
|
|
*/
|
|
|
|
static inline int strncpy_from_user(char *dst, const char __user *src, int count)
|
|
{
|
|
return(CHOOSE_MODE_PROC(strncpy_from_user_tt, strncpy_from_user_skas,
|
|
dst, src, count));
|
|
}
|
|
|
|
/*
|
|
* __clear_user: - Zero a block of memory in user space, with less checking.
|
|
* @to: Destination address, in user space.
|
|
* @n: Number of bytes to zero.
|
|
*
|
|
* Zero a block of memory in user space. Caller must check
|
|
* the specified block with access_ok() before calling this function.
|
|
*
|
|
* Returns number of bytes that could not be cleared.
|
|
* On success, this will be zero.
|
|
*/
|
|
static inline int __clear_user(void *mem, int len)
|
|
{
|
|
return(CHOOSE_MODE_PROC(__clear_user_tt, __clear_user_skas, mem, len));
|
|
}
|
|
|
|
/*
|
|
* clear_user: - Zero a block of memory in user space.
|
|
* @to: Destination address, in user space.
|
|
* @n: Number of bytes to zero.
|
|
*
|
|
* Zero a block of memory in user space.
|
|
*
|
|
* Returns number of bytes that could not be cleared.
|
|
* On success, this will be zero.
|
|
*/
|
|
static inline int clear_user(void __user *mem, int len)
|
|
{
|
|
return(CHOOSE_MODE_PROC(clear_user_tt, clear_user_skas, mem, len));
|
|
}
|
|
|
|
/*
|
|
* strlen_user: - Get the size of a string in user space.
|
|
* @str: The string to measure.
|
|
* @n: The maximum valid length
|
|
*
|
|
* Get the size of a NUL-terminated string in user space.
|
|
*
|
|
* Returns the size of the string INCLUDING the terminating NUL.
|
|
* On exception, returns 0.
|
|
* If the string is too long, returns a value greater than @n.
|
|
*/
|
|
static inline int strnlen_user(const void __user *str, long len)
|
|
{
|
|
return(CHOOSE_MODE_PROC(strnlen_user_tt, strnlen_user_skas, str, len));
|
|
}
|
|
|
|
#endif
|
|
|
|
/*
|
|
* Overrides for Emacs so that we follow Linus's tabbing style.
|
|
* Emacs will notice this stuff at the end of the file and automatically
|
|
* adjust the settings for this buffer only. This must remain at the end
|
|
* of the file.
|
|
* ---------------------------------------------------------------------------
|
|
* Local variables:
|
|
* c-file-style: "linux"
|
|
* End:
|
|
*/
|