diff options
Diffstat (limited to 'include/asm-sh/uaccess.h')
| -rw-r--r-- | include/asm-sh/uaccess.h | 40 |
1 files changed, 22 insertions, 18 deletions
diff --git a/include/asm-sh/uaccess.h b/include/asm-sh/uaccess.h index 5c49ed6715f2..f18a1a5c95c0 100644 --- a/include/asm-sh/uaccess.h +++ b/include/asm-sh/uaccess.h @@ -61,8 +61,6 @@ static inline void set_fs(mm_segment_t s) */ static inline int __access_ok(unsigned long addr, unsigned long size) { - extern unsigned long memory_start, memory_end; - return ((addr >= memory_start) && ((addr + size) < memory_end)); } #else /* CONFIG_MMU */ @@ -76,7 +74,7 @@ static inline int __access_ok(unsigned long addr, unsigned long size) * __access_ok: Check if address with size is OK or not. * * We do three checks: - * (1) is it user space? + * (1) is it user space? * (2) addr + size --> carry? * (3) addr + size >= 0x80000000 (PAGE_OFFSET) * @@ -142,11 +140,12 @@ static inline int access_ok(int type, const void __user *p, unsigned long size) __get_user_nocheck((x),(ptr),sizeof(*(ptr))) struct __large_struct { unsigned long buf[100]; }; -#define __m(x) (*(struct __large_struct *)(x)) +#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"); \ @@ -175,6 +174,7 @@ do { \ #define __get_user_check(x,ptr,size) \ ({ \ long __gu_err, __gu_val; \ + __chk_user_ptr(ptr); \ switch (size) { \ case 1: \ __get_user_1(__gu_val, (ptr), __gu_err); \ @@ -300,6 +300,7 @@ extern void __get_user_unknown(void); #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"); \ @@ -328,7 +329,7 @@ do { \ #define __put_user_check(x,ptr,size) \ ({ \ long __pu_err = -EFAULT; \ - __typeof__(*(ptr)) *__pu_addr = (ptr); \ + __typeof__(*(ptr)) __user *__pu_addr = (ptr); \ \ if (__access_ok((unsigned long)__pu_addr,size)) \ __put_user_size((x),__pu_addr,(size),__pu_err); \ @@ -406,10 +407,10 @@ __asm__ __volatile__( \ #endif extern void __put_user_unknown(void); - + /* Generic arbitrary sized copy. */ /* Return the number of bytes NOT copied */ -extern __kernel_size_t __copy_user(void *to, const void *from, __kernel_size_t n); +__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); \ @@ -420,14 +421,6 @@ __copy_res = __copy_user(__copy_to, (void *) (from), __copy_size); \ } else __copy_res = __copy_size; \ __copy_res; }) -#define __copy_to_user(to,from,n) \ - __copy_user((void *)(to), \ - (void *)(from), n) - -#define __copy_to_user_inatomic __copy_to_user -#define __copy_from_user_inatomic __copy_from_user - - #define copy_from_user(to,from,n) ({ \ void *__copy_to = (void *) (to); \ void *__copy_from = (void *) (from); \ @@ -438,9 +431,20 @@ __copy_res = __copy_user(__copy_to, __copy_from, __copy_size); \ } else __copy_res = __copy_size; \ __copy_res; }) -#define __copy_from_user(to,from,n) \ - __copy_user((void *)(to), \ - (void *)(from), n) +static __always_inline unsigned long +__copy_from_user(void *to, const void __user *from, unsigned long n) +{ + return __copy_user(to, (__force void *)from, n); +} + +static __always_inline unsigned long __must_check +__copy_to_user(void __user *to, const void *from, unsigned long n) +{ + return __copy_user((__force void *)to, from, n); +} + +#define __copy_to_user_inatomic __copy_to_user +#define __copy_from_user_inatomic __copy_from_user /* * Clear the area and return remaining number of bytes |