arch/um/include/tt/uaccess-tt.h

   1 /*
   2  * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
   3  * Licensed under the GPL
   4  */
   5
   6 #ifndef __TT_UACCESS_H
   7 #define __TT_UACCESS_H
   8
   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"
  16
  17 #define ABOVE_KMEM (16 * 1024 * 1024)
  18
  19 extern unsigned long end_vm;
  20 extern unsigned long uml_physmem;
  21
  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))
  26
  27 #define access_ok_tt(type, addr, size) \
  28         (is_stack(addr, size))
  29
  30 extern int __do_copy_from_user(void *to, const void *from, int n,
  31                                void **fault_addr, void **fault_catcher);
  32 extern int __do_strncpy_from_user(char *dst, const char *src, size_t n,
  33                                   void **fault_addr, void **fault_catcher);
  34 extern int __do_clear_user(void *mem, size_t len, void **fault_addr,
  35                            void **fault_catcher);
  36 extern int __do_strnlen_user(const char *str, unsigned long n,
  37                              void **fault_addr, void **fault_catcher);
  38
  39 extern int copy_from_user_tt(void *to, const void __user *from, int n);
  40 extern int copy_to_user_tt(void __user *to, const void *from, int n);
  41 extern int strncpy_from_user_tt(char *dst, const char __user *src, int count);
  42 extern int __clear_user_tt(void __user *mem, int len);
  43 extern int clear_user_tt(void __user *mem, int len);
  44 extern int strnlen_user_tt(const void __user *str, int len);
  45
  46 #endif