* Copyright (C) 1996, 1997, 1998 by Ralf Baechle
* and i386 version.
*/
-#ifndef __ASM_SH_UACCESS_H
-#define __ASM_SH_UACCESS_H
+#ifndef __ASM_SH_UACCESS_32_H
+#define __ASM_SH_UACCESS_32_H
#include <linux/errno.h>
#include <linux/sched.h>
* If we don't have an MMU (or if its disabled) the only thing we really have
* to look out for is if the address resides somewhere outside of what
* available RAM we have.
- *
- * TODO: This check could probably also stand to be restricted somewhat more..
- * though it still does the Right Thing(tm) for the time being.
*/
static inline int __access_ok(unsigned long addr, unsigned long size)
{
- return ((addr >= memory_start) && ((addr + size) < memory_end));
+ return 1;
}
#else /* CONFIG_MMU */
#define __addr_ok(addr) \
}
#endif /* CONFIG_MMU */
-static inline int access_ok(int type, const void __user *p, unsigned long size)
-{
- unsigned long addr = (unsigned long)p;
- return __access_ok(addr, size);
-}
+#define access_ok(type, addr, size) \
+ (__chk_user_ptr(addr), \
+ __access_ok((unsigned long __force)(addr), (size)))
/*
* Uh, these should become the main single-value transfer routines ...
* (a) re-use the arguments for side effects (sizeof is ok)
* (b) require any knowledge of processes at this stage
*/
-#define put_user(x,ptr) __put_user_check((x),(ptr),sizeof(*(ptr)))
-#define get_user(x,ptr) __get_user_check((x),(ptr),sizeof(*(ptr)))
+#define put_user(x,ptr) __put_user_check((x), (ptr), sizeof(*(ptr)))
+#define get_user(x,ptr) __get_user_check((x), (ptr), sizeof(*(ptr)))
/*
* The "__xxx" versions do not do address space checking, useful when
* doing multiple accesses to the same area (the user has to do the
* checks by hand with "access_ok()")
*/
-#define __put_user(x,ptr) \
- __put_user_nocheck((__typeof__(*(ptr)))(x),(ptr),sizeof(*(ptr)))
-#define __get_user(x,ptr) \
- __get_user_nocheck((x),(ptr),sizeof(*(ptr)))
+#define __put_user(x,ptr) __put_user_nocheck((x), (ptr), sizeof(*(ptr)))
+#define __get_user(x,ptr) __get_user_nocheck((x), (ptr), sizeof(*(ptr)))
struct __large_struct { unsigned long buf[100]; };
#define __m(x) (*(struct __large_struct __user *)(x))
#define __get_user_size(x,ptr,size,retval) \
do { \
retval = 0; \
- __chk_user_ptr(ptr); \
switch (size) { \
case 1: \
__get_user_asm(x, ptr, retval, "b"); \
#define __get_user_nocheck(x,ptr,size) \
({ \
- long __gu_err, __gu_val; \
- __typeof__(*(ptr)) *__pu_addr = (ptr); \
- __get_user_size(__gu_val, (__pu_addr), (size), __gu_err); \
+ long __gu_err; \
+ unsigned long __gu_val; \
+ const __typeof__(*(ptr)) __user *__gu_addr = (ptr); \
+ __chk_user_ptr(ptr); \
+ __get_user_size(__gu_val, __gu_addr, (size), __gu_err); \
(x) = (__typeof__(*(ptr)))__gu_val; \
__gu_err; \
})
#define __get_user_check(x,ptr,size) \
({ \
- long __gu_err, __gu_val; \
- __typeof__(*(ptr)) *__pu_addr = (ptr); \
- __chk_user_ptr(__pu_addr); \
- if (likely(__addr_ok((unsigned long)(__pu_addr)))) { \
- __get_user_size(__gu_val, (__pu_addr), (size), __gu_err);\
- } else { \
- __gu_err = -EFAULT; \
- __gu_val = 0; \
- } \
+ long __gu_err = -EFAULT; \
+ unsigned long __gu_val = 0; \
+ const __typeof__(*(ptr)) *__gu_addr = (ptr); \
+ if (likely(access_ok(VERIFY_READ, __gu_addr, (size)))) \
+ __get_user_size(__gu_val, __gu_addr, (size), __gu_err); \
(x) = (__typeof__(*(ptr)))__gu_val; \
__gu_err; \
})
#define __put_user_size(x,ptr,size,retval) \
do { \
retval = 0; \
- __chk_user_ptr(ptr); \
switch (size) { \
case 1: \
__put_user_asm(x, ptr, retval, "b"); \
} \
} while (0)
-#define __put_user_nocheck(x,ptr,size) \
-({ \
- long __pu_err; \
- __put_user_size((x),(ptr),(size),__pu_err); \
- __pu_err; \
+#define __put_user_nocheck(x,ptr,size) \
+({ \
+ long __pu_err; \
+ __typeof__(*(ptr)) __user *__pu_addr = (ptr); \
+ __chk_user_ptr(ptr); \
+ __put_user_size((x), __pu_addr, (size), __pu_err); \
+ __pu_err; \
})
#define __put_user_check(x,ptr,size) \
({ \
- long __pu_err; \
+ long __pu_err = -EFAULT; \
__typeof__(*(ptr)) __user *__pu_addr = (ptr); \
- \
- if (likely(__addr_ok((unsigned long)__pu_addr))) \
- __put_user_size((x),__pu_addr,(size),__pu_err); \
- else \
- __pu_err = -EFAULT; \
+ if (likely(access_ok(VERIFY_WRITE, __pu_addr, size))) \
+ __put_user_size((x), __pu_addr, (size), \
+ __pu_err); \
__pu_err; \
})
/* Return the number of bytes NOT copied */
__kernel_size_t __copy_user(void *to, const void *from, __kernel_size_t n);
-#define copy_to_user(to,from,n) ({ \
-void *__copy_to = (void *) (to); \
-__kernel_size_t __copy_size = (__kernel_size_t) (n); \
-__kernel_size_t __copy_res; \
-if(__copy_size && __access_ok((unsigned long)__copy_to, __copy_size)) { \
-__copy_res = __copy_user(__copy_to, (void *) (from), __copy_size); \
-} else __copy_res = __copy_size; \
-__copy_res; })
-
-#define copy_from_user(to,from,n) ({ \
-void *__copy_to = (void *) (to); \
-void *__copy_from = (void *) (from); \
-__kernel_size_t __copy_size = (__kernel_size_t) (n); \
-__kernel_size_t __copy_res; \
-if(__copy_size && __access_ok((unsigned long)__copy_from, __copy_size)) { \
-__copy_res = __copy_user(__copy_to, __copy_from, __copy_size); \
-} else __copy_res = __copy_size; \
-__copy_res; })
static __always_inline unsigned long
__copy_from_user(void *to, const void __user *from, unsigned long n)
extern int fixup_exception(struct pt_regs *regs);
-#endif /* __ASM_SH_UACCESS_H */
+#endif /* __ASM_SH_UACCESS_32_H */
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