| #ifndef __ASM_SH_UACCESS_H |
| #define __ASM_SH_UACCESS_H |
| |
| #include <asm/segment.h> |
| #include <asm/extable.h> |
| |
| #define __addr_ok(addr) \ |
| ((unsigned long __force)(addr) < current_thread_info()->addr_limit.seg) |
| |
| /* |
| * __access_ok: Check if address with size is OK or not. |
| * |
| * Uhhuh, this needs 33-bit arithmetic. We have a carry.. |
| * |
| * sum := addr + size; carry? --> flag = true; |
| * if (sum >= addr_limit) flag = true; |
| */ |
| #define __access_ok(addr, size) \ |
| (__addr_ok((addr) + (size))) |
| #define access_ok(type, addr, size) \ |
| (__chk_user_ptr(addr), \ |
| __access_ok((unsigned long __force)(addr), (size))) |
| |
| #define user_addr_max() (current_thread_info()->addr_limit.seg) |
| |
| /* |
| * Uh, these should become the main single-value transfer routines ... |
| * They automatically use the right size if we just have the right |
| * pointer type ... |
| * |
| * As SuperH uses the same address space for kernel and user data, we |
| * can just do these as direct assignments. |
| * |
| * Careful to not |
| * (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))) |
| |
| /* |
| * 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((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_nocheck(x,ptr,size) \ |
| ({ \ |
| 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) = (__force __typeof__(*(ptr)))__gu_val; \ |
| __gu_err; \ |
| }) |
| |
| #define __get_user_check(x,ptr,size) \ |
| ({ \ |
| 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) = (__force __typeof__(*(ptr)))__gu_val; \ |
| __gu_err; \ |
| }) |
| |
| #define __put_user_nocheck(x,ptr,size) \ |
| ({ \ |
| long __pu_err; \ |
| __typeof__(*(ptr)) __user *__pu_addr = (ptr); \ |
| __typeof__(*(ptr)) __pu_val = x; \ |
| __chk_user_ptr(ptr); \ |
| __put_user_size(__pu_val, __pu_addr, (size), __pu_err); \ |
| __pu_err; \ |
| }) |
| |
| #define __put_user_check(x,ptr,size) \ |
| ({ \ |
| long __pu_err = -EFAULT; \ |
| __typeof__(*(ptr)) __user *__pu_addr = (ptr); \ |
| __typeof__(*(ptr)) __pu_val = x; \ |
| if (likely(access_ok(VERIFY_WRITE, __pu_addr, size))) \ |
| __put_user_size(__pu_val, __pu_addr, (size), \ |
| __pu_err); \ |
| __pu_err; \ |
| }) |
| |
| #ifdef CONFIG_SUPERH32 |
| # include <asm/uaccess_32.h> |
| #else |
| # include <asm/uaccess_64.h> |
| #endif |
| |
| extern long strncpy_from_user(char *dest, const char __user *src, long count); |
| |
| extern __must_check long strlen_user(const char __user *str); |
| extern __must_check long strnlen_user(const char __user *str, long n); |
| |
| /* Generic arbitrary sized copy. */ |
| /* Return the number of bytes NOT copied */ |
| __kernel_size_t __copy_user(void *to, const void *from, __kernel_size_t n); |
| |
| static __always_inline unsigned long |
| raw_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 |
| raw_copy_to_user(void __user *to, const void *from, unsigned long n) |
| { |
| return __copy_user((__force void *)to, from, n); |
| } |
| #define INLINE_COPY_FROM_USER |
| #define INLINE_COPY_TO_USER |
| |
| /* |
| * Clear the area and return remaining number of bytes |
| * (on failure. Usually it's 0.) |
| */ |
| __kernel_size_t __clear_user(void *addr, __kernel_size_t size); |
| |
| #define clear_user(addr,n) \ |
| ({ \ |
| void __user * __cl_addr = (addr); \ |
| unsigned long __cl_size = (n); \ |
| \ |
| if (__cl_size && access_ok(VERIFY_WRITE, \ |
| ((unsigned long)(__cl_addr)), __cl_size)) \ |
| __cl_size = __clear_user(__cl_addr, __cl_size); \ |
| \ |
| __cl_size; \ |
| }) |
| |
| extern void *set_exception_table_vec(unsigned int vec, void *handler); |
| |
| static inline void *set_exception_table_evt(unsigned int evt, void *handler) |
| { |
| return set_exception_table_vec(evt >> 5, handler); |
| } |
| |
| struct mem_access { |
| unsigned long (*from)(void *dst, const void __user *src, unsigned long cnt); |
| unsigned long (*to)(void __user *dst, const void *src, unsigned long cnt); |
| }; |
| |
| int handle_unaligned_access(insn_size_t instruction, struct pt_regs *regs, |
| struct mem_access *ma, int, unsigned long address); |
| |
| #endif /* __ASM_SH_UACCESS_H */ |