2 * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
3 * Licensed under the GPL
9 #include "linux/string.h"
10 #include "linux/sched.h"
11 #include "asm/processor.h"
12 #include "asm/errno.h"
13 #include "asm/current.h"
14 #include "asm/a.out.h"
15 #include "uml_uaccess.h"
17 #define ABOVE_KMEM (16 * 1024 * 1024)
19 extern unsigned long end_vm;
20 extern unsigned long uml_physmem;
22 #define is_stack(addr, size) \
23 (((unsigned long) (addr) < STACK_TOP) && \
24 ((unsigned long) (addr) >= STACK_TOP - ABOVE_KMEM) && \
25 (((unsigned long) (addr) + (size)) <= STACK_TOP))
27 #define access_ok_tt(type, addr, size) \
28 (is_stack(addr, size))
30 extern unsigned long get_fault_addr(void);
32 extern int __do_copy_from_user(void *to, const void *from, int n,
33 void **fault_addr, void **fault_catcher);
34 extern int __do_strncpy_from_user(char *dst, const char *src, size_t n,
35 void **fault_addr, void **fault_catcher);
36 extern int __do_clear_user(void *mem, size_t len, void **fault_addr,
37 void **fault_catcher);
38 extern int __do_strnlen_user(const char *str, unsigned long n,
39 void **fault_addr, void **fault_catcher);
41 extern int copy_from_user_tt(void *to, const void __user *from, int n);
42 extern int copy_to_user_tt(void __user *to, const void *from, int n);
43 extern int strncpy_from_user_tt(char *dst, const char __user *src, int count);
44 extern int __clear_user_tt(void __user *mem, int len);
45 extern int clear_user_tt(void __user *mem, int len);
46 extern int strnlen_user_tt(const void __user *str, int len);