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/*
* Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
* Licensed under the GPL
*/
#ifndef __TT_UACCESS_H
#define __TT_UACCESS_H
#include "linux/string.h"
#include "linux/sched.h"
#include "asm/processor.h"
#include "asm/errno.h"
#include "asm/current.h"
#include "asm/a.out.h"
#include "uml_uaccess.h"
#define ABOVE_KMEM (16 * 1024 * 1024)
extern unsigned long end_vm;
extern unsigned long uml_physmem;
#define under_task_size(addr, size) \
(((unsigned long) (addr) < TASK_SIZE) && \
(((unsigned long) (addr) + (size)) < TASK_SIZE))
#define is_stack(addr, size) \
(((unsigned long) (addr) < STACK_TOP) && \
((unsigned long) (addr) >= STACK_TOP - ABOVE_KMEM) && \
(((unsigned long) (addr) + (size)) <= STACK_TOP))
#define access_ok_tt(type, addr, size) \
((type == VERIFY_READ) || (segment_eq(get_fs(), KERNEL_DS)) || \
(((unsigned long) (addr) <= ((unsigned long) (addr) + (size))) && \
(under_task_size(addr, size) || is_stack(addr, size))))
static inline int verify_area_tt(int type, const void * addr,
unsigned long size)
{
return(access_ok_tt(type, addr, size) ? 0 : -EFAULT);
}
extern unsigned long get_fault_addr(void);
extern int __do_copy_from_user(void *to, const void *from, int n,
void **fault_addr, void **fault_catcher);
extern int __do_strncpy_from_user(char *dst, const char *src, size_t n,
void **fault_addr, void **fault_catcher);
extern int __do_clear_user(void *mem, size_t len, void **fault_addr,
void **fault_catcher);
extern int __do_strnlen_user(const char *str, unsigned long n,
void **fault_addr, void **fault_catcher);
extern int copy_from_user_tt(void *to, const void *from, int n);
extern int copy_to_user_tt(void *to, const void *from, int n);
extern int strncpy_from_user_tt(char *dst, const char *src, int count);
extern int __clear_user_tt(void *mem, int len);
extern int clear_user_tt(void *mem, int len);
extern int strnlen_user_tt(const void *str, int 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:
*/
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