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 under_task_size(addr, size) \
23 (((unsigned long) (addr) < TASK_SIZE) && \
24 (((unsigned long) (addr) + (size)) < TASK_SIZE))
26 #define is_stack(addr, size) \
27 (((unsigned long) (addr) < STACK_TOP) && \
28 ((unsigned long) (addr) >= STACK_TOP - ABOVE_KMEM) && \
29 (((unsigned long) (addr) + (size)) <= STACK_TOP))
31 #define access_ok_tt(type, addr, size) \
32 ((type == VERIFY_READ) || (segment_eq(get_fs(), KERNEL_DS)) || \
33 (((unsigned long) (addr) <= ((unsigned long) (addr) + (size))) && \
34 (under_task_size(addr, size) || is_stack(addr, size))))
36 static inline int verify_area_tt(int type, const void __user * addr,
39 return(access_ok_tt(type, addr, size) ? 0 : -EFAULT);
42 extern unsigned long get_fault_addr(void);
44 extern int __do_copy_from_user(void *to, const void *from, int n,
45 void **fault_addr, void **fault_catcher);
46 extern int __do_strncpy_from_user(char *dst, const char *src, size_t n,
47 void **fault_addr, void **fault_catcher);
48 extern int __do_clear_user(void *mem, size_t len, void **fault_addr,
49 void **fault_catcher);
50 extern int __do_strnlen_user(const char *str, unsigned long n,
51 void **fault_addr, void **fault_catcher);
53 extern int copy_from_user_tt(void *to, const void __user *from, int n);
54 extern int copy_to_user_tt(void __user *to, const void *from, int n);
55 extern int strncpy_from_user_tt(char *dst, const char __user *src, int count);
56 extern int __clear_user_tt(void __user *mem, int len);
57 extern int clear_user_tt(void __user *mem, int len);
58 extern int strnlen_user_tt(const void __user *str, int len);
63 * Overrides for Emacs so that we follow Linus's tabbing style.
64 * Emacs will notice this stuff at the end of the file and automatically
65 * adjust the settings for this buffer only. This must remain at the end
67 * ---------------------------------------------------------------------------
69 * c-file-style: "linux"