mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-01 14:36:51 +07:00
038b0a6d8d
kbuild explicitly includes this at build time. Signed-off-by: Dave Jones <davej@redhat.com>
137 lines
3.9 KiB
C
137 lines
3.9 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 "choose-mode.h"
|
|
|
|
#ifdef CONFIG_MODE_TT
|
|
#include "uaccess-tt.h"
|
|
#endif
|
|
|
|
#ifdef CONFIG_MODE_SKAS
|
|
#include "uaccess-skas.h"
|
|
#endif
|
|
|
|
#include "asm/fixmap.h"
|
|
|
|
#define __under_task_size(addr, size) \
|
|
(((unsigned long) (addr) < TASK_SIZE) && \
|
|
(((unsigned long) (addr) + (size)) < TASK_SIZE))
|
|
|
|
#define __access_ok_vsyscall(type, addr, size) \
|
|
((type == VERIFY_READ) && \
|
|
((unsigned long) (addr) >= FIXADDR_USER_START) && \
|
|
((unsigned long) (addr) + (size) <= FIXADDR_USER_END) && \
|
|
((unsigned long) (addr) + (size) >= (unsigned long)(addr)))
|
|
|
|
#define __addr_range_nowrap(addr, size) \
|
|
((unsigned long) (addr) <= ((unsigned long) (addr) + (size)))
|
|
|
|
#define access_ok(type, addr, size) \
|
|
(__addr_range_nowrap(addr, size) && \
|
|
(__under_task_size(addr, size) || \
|
|
__access_ok_vsyscall(type, addr, size) || \
|
|
segment_eq(get_fs(), KERNEL_DS) || \
|
|
CHOOSE_MODE_PROC(access_ok_tt, access_ok_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:
|
|
*/
|