diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-sh/uaccess.h | 222 | ||||
| -rw-r--r-- | include/asm-sh/uaccess_32.h | 277 | ||||
| -rw-r--r-- | include/asm-sh/uaccess_64.h | 187 |
3 files changed, 270 insertions, 416 deletions
diff --git a/include/asm-sh/uaccess.h b/include/asm-sh/uaccess.h index b3440c305b5..45c2c9b2993 100644 --- a/include/asm-sh/uaccess.h +++ b/include/asm-sh/uaccess.h @@ -1,12 +1,171 @@ #ifndef __ASM_SH_UACCESS_H #define __ASM_SH_UACCESS_H +#include <linux/errno.h> +#include <linux/sched.h> +#include <asm/segment.h> + +#define VERIFY_READ 0 +#define VERIFY_WRITE 1 + +#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))) + +/* + * 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) = (__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) = (__typeof__(*(ptr)))__gu_val; \ + __gu_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 = -EFAULT; \ + __typeof__(*(ptr)) __user *__pu_addr = (ptr); \ + if (likely(access_ok(VERIFY_WRITE, __pu_addr, size))) \ + __put_user_size((x), __pu_addr, (size), \ + __pu_err); \ + __pu_err; \ +}) + #ifdef CONFIG_SUPERH32 # include "uaccess_32.h" #else # include "uaccess_64.h" #endif +/* 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 +__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 + * (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; \ +}) + +/** + * strncpy_from_user: - Copy a NUL terminated string from userspace. + * @dst: Destination address, in kernel space. This buffer must be at + * least @count bytes long. + * @src: Source address, in user space. + * @count: Maximum number of bytes to copy, including the trailing NUL. + * + * Copies a NUL-terminated string from userspace to kernel space. + * + * On success, returns the length of the string (not including the trailing + * NUL). + * + * If access to userspace fails, returns -EFAULT (some data may have been + * copied). + * + * If @count is smaller than the length of the string, copies @count bytes + * and returns @count. + */ +#define strncpy_from_user(dest,src,count) \ +({ \ + unsigned long __sfu_src = (unsigned long)(src); \ + int __sfu_count = (int)(count); \ + long __sfu_res = -EFAULT; \ + \ + if (__access_ok(__sfu_src, __sfu_count)) \ + __sfu_res = __strncpy_from_user((unsigned long)(dest), \ + __sfu_src, __sfu_count); \ + \ + __sfu_res; \ +}) + static inline unsigned long copy_from_user(void *to, const void __user *from, unsigned long n) { @@ -31,4 +190,67 @@ copy_to_user(void __user *to, const void *from, unsigned long n) return __copy_size; } +/** + * strnlen_user: - Get the size of a string in user space. + * @s: The string to measure. + * @n: The maximum valid length + * + * Context: User context only. This function may sleep. + * + * Get the size of a NUL-terminated string in user space. + * + * Returns the size of the string INCLUDING the terminating NUL. + * On exception, returns 0. + * If the string is too long, returns a value greater than @n. + */ +static inline long strnlen_user(const char __user *s, long n) +{ + if (!__addr_ok(s)) + return 0; + else + return __strnlen_user(s, n); +} + +/** + * strlen_user: - Get the size of a string in user space. + * @str: The string to measure. + * + * Context: User context only. This function may sleep. + * + * Get the size of a NUL-terminated string in user space. + * + * Returns the size of the string INCLUDING the terminating NUL. + * On exception, returns 0. + * + * If there is a limit on the length of a valid string, you may wish to + * consider using strnlen_user() instead. + */ +#define strlen_user(str) strnlen_user(str, ~0UL >> 1) + +/* + * The exception table consists of pairs of addresses: the first is the + * address of an instruction that is allowed to fault, and the second is + * the address at which the program should continue. No registers are + * modified, so it is entirely up to the continuation code to figure out + * what to do. + * + * All the routines below use bits of fixup code that are out of line + * with the main instruction path. This means when everything is well, + * we don't even have to jump over them. Further, they do not intrude + * on our cache or tlb entries. + */ +struct exception_table_entry { + unsigned long insn, fixup; +}; + +#if defined(CONFIG_SUPERH64) && defined(CONFIG_MMU) +#define ARCH_HAS_SEARCH_EXTABLE +#endif + +int fixup_exception(struct pt_regs *regs); +/* Returns 0 if exception not found and fixup.unit otherwise. */ +unsigned long search_exception_table(unsigned long addr); +const struct exception_table_entry *search_exception_tables(unsigned long addr); + + #endif /* __ASM_SH_UACCESS_H */ diff --git a/include/asm-sh/uaccess_32.h b/include/asm-sh/uaccess_32.h index 44abd168232..ae0d24f6653 100644 --- a/include/asm-sh/uaccess_32.h +++ b/include/asm-sh/uaccess_32.h @@ -12,56 +12,6 @@ #ifndef __ASM_SH_UACCESS_32_H #define __ASM_SH_UACCESS_32_H -#include <linux/errno.h> -#include <linux/sched.h> -#include <asm/segment.h> - -#define VERIFY_READ 0 -#define VERIFY_WRITE 1 - -#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))) - -/* - * 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_size(x,ptr,size,retval) \ do { \ retval = 0; \ @@ -81,28 +31,7 @@ do { \ } \ } while (0) -#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) = (__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) = (__typeof__(*(ptr)))__gu_val; \ - __gu_err; \ -}) - +#ifdef CONFIG_MMU #define __get_user_asm(x, addr, err, insn) \ ({ \ __asm__ __volatile__( \ @@ -123,6 +52,16 @@ __asm__ __volatile__( \ ".previous" \ :"=&r" (err), "=&r" (x) \ :"m" (__m(addr)), "i" (-EFAULT), "0" (err)); }) +#else +#define __get_user_asm(x, addr, err, insn) \ +do { \ + __asm__ __volatile__ ( \ + "mov." insn " %1, %0\n\t" \ + : "=&r" (x) \ + : "m" (__m(addr)) \ + ); \ +} while (0) +#endif /* CONFIG_MMU */ extern void __get_user_unknown(void); @@ -147,45 +86,41 @@ do { \ } \ } while (0) -#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 = -EFAULT; \ - __typeof__(*(ptr)) __user *__pu_addr = (ptr); \ - if (likely(access_ok(VERIFY_WRITE, __pu_addr, size))) \ - __put_user_size((x), __pu_addr, (size), \ - __pu_err); \ - __pu_err; \ -}) - -#define __put_user_asm(x, addr, err, insn) \ -({ \ -__asm__ __volatile__( \ - "1:\n\t" \ - "mov." insn " %1, %2\n\t" \ - "2:\n" \ - ".section .fixup,\"ax\"\n" \ - "3:\n\t" \ - "mov.l 4f, %0\n\t" \ - "jmp @%0\n\t" \ - " mov %3, %0\n\t" \ - ".balign 4\n" \ - "4: .long 2b\n\t" \ - ".previous\n" \ - ".section __ex_table,\"a\"\n\t" \ - ".long 1b, 3b\n\t" \ - ".previous" \ - :"=&r" (err) \ - :"r" (x), "m" (__m(addr)), "i" (-EFAULT), "0" (err) \ - :"memory"); }) +#ifdef CONFIG_MMU +#define __put_user_asm(x, addr, err, insn) \ +do { \ + __asm__ __volatile__ ( \ + "1:\n\t" \ + "mov." insn " %1, %2\n\t" \ + "2:\n" \ + ".section .fixup,\"ax\"\n" \ + "3:\n\t" \ + "mov.l 4f, %0\n\t" \ + "jmp @%0\n\t" \ + " mov %3, %0\n\t" \ + ".balign 4\n" \ + "4: .long 2b\n\t" \ + ".previous\n" \ + ".section __ex_table,\"a\"\n\t" \ + ".long 1b, 3b\n\t" \ + ".previous" \ + : "=&r" (err) \ + : "r" (x), "m" (__m(addr)), "i" (-EFAULT), \ + "0" (err) \ + : "memory" \ + ); \ +} while (0) +#else +#define __put_user_asm(x, addr, err, insn) \ +do { \ + __asm__ __volatile__ ( \ + "mov." insn " %0, %1\n\t" \ + : /* no outputs */ \ + : "r" (x), "m" (__m(addr)) \ + : "memory" \ + ); \ +} while (0) +#endif /* CONFIG_MMU */ #if defined(CONFIG_CPU_LITTLE_ENDIAN) #define __put_user_u64(val,addr,retval) \ @@ -235,40 +170,7 @@ __asm__ __volatile__( \ extern void __put_user_unknown(void); -/* 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 -__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 - * (on failure. Usually it's 0.) - */ -extern __kernel_size_t __clear_user(void *addr, __kernel_size_t size); - -#define clear_user(addr,n) ({ \ -void * __cl_addr = (addr); \ -unsigned long __cl_size = (n); \ -if (__cl_size && __access_ok(((unsigned long)(__cl_addr)), __cl_size)) \ -__cl_size = __clear_user(__cl_addr, __cl_size); \ -__cl_size; }) - -static __inline__ int +static inline int __strncpy_from_user(unsigned long __dest, unsigned long __user __src, int __count) { __kernel_size_t res; @@ -307,37 +209,11 @@ __strncpy_from_user(unsigned long __dest, unsigned long __user __src, int __coun return res; } -/** - * strncpy_from_user: - Copy a NUL terminated string from userspace. - * @dst: Destination address, in kernel space. This buffer must be at - * least @count bytes long. - * @src: Source address, in user space. - * @count: Maximum number of bytes to copy, including the trailing NUL. - * - * Copies a NUL-terminated string from userspace to kernel space. - * - * On success, returns the length of the string (not including the trailing - * NUL). - * - * If access to userspace fails, returns -EFAULT (some data may have been - * copied). - * - * If @count is smaller than the length of the string, copies @count bytes - * and returns @count. - */ -#define strncpy_from_user(dest,src,count) ({ \ -unsigned long __sfu_src = (unsigned long) (src); \ -int __sfu_count = (int) (count); \ -long __sfu_res = -EFAULT; \ -if(__access_ok(__sfu_src, __sfu_count)) { \ -__sfu_res = __strncpy_from_user((unsigned long) (dest), __sfu_src, __sfu_count); \ -} __sfu_res; }) - /* * Return the size of a string (including the ending 0 even when we have * exceeded the maximum string length). */ -static __inline__ long __strnlen_user(const char __user *__s, long __n) +static inline long __strnlen_user(const char __user *__s, long __n) { unsigned long res; unsigned long __dummy; @@ -369,61 +245,4 @@ static __inline__ long __strnlen_user(const char __user *__s, long __n) return res; } -/** - * strnlen_user: - Get the size of a string in user space. - * @s: The string to measure. - * @n: The maximum valid length - * - * Context: User context only. This function may sleep. - * - * Get the size of a NUL-terminated string in user space. - * - * Returns the size of the string INCLUDING the terminating NUL. - * On exception, returns 0. - * If the string is too long, returns a value greater than @n. - */ -static __inline__ long strnlen_user(const char __user *s, long n) -{ - if (!__addr_ok(s)) - return 0; - else - return __strnlen_user(s, n); -} - -/** - * strlen_user: - Get the size of a string in user space. - * @str: The string to measure. - * - * Context: User context only. This function may sleep. - * - * Get the size of a NUL-terminated string in user space. - * - * Returns the size of the string INCLUDING the terminating NUL. - * On exception, returns 0. - * - * If there is a limit on the length of a valid string, you may wish to - * consider using strnlen_user() instead. - */ -#define strlen_user(str) strnlen_user(str, ~0UL >> 1) - -/* - * The exception table consists of pairs of addresses: the first is the - * address of an instruction that is allowed to fault, and the second is - * the address at which the program should continue. No registers are - * modified, so it is entirely up to the continuation code to figure out - * what to do. - * - * All the routines below use bits of fixup code that are out of line - * with the main instruction path. This means when everything is well, - * we don't even have to jump over them. Further, they do not intrude - * on our cache or tlb entries. - */ - -struct exception_table_entry -{ - unsigned long insn, fixup; -}; - -extern int fixup_exception(struct pt_regs *regs); - #endif /* __ASM_SH_UACCESS_32_H */ diff --git a/include/asm-sh/uaccess_64.h b/include/asm-sh/uaccess_64.h index 5833754dc74..81b3d515fcb 100644 --- a/include/asm-sh/uaccess_64.h +++ b/include/asm-sh/uaccess_64.h @@ -20,68 +20,6 @@ * License. See the file "COPYING" in the main directory of this archive * for more details. */ -#include <linux/errno.h> -#include <linux/sched.h> - -#define VERIFY_READ 0 -#define VERIFY_WRITE 1 - -#define __addr_ok(addr) ((unsigned long)(addr) < (current_thread_info()->addr_limit.seg)) - -/* - * Uhhuh, this needs 33-bit arithmetic. We have a carry.. - * - * sum := addr + size; carry? --> flag = true; - * if (sum >= addr_limit) flag = true; - */ -#define __range_ok(addr,size) (((unsigned long) (addr) + (size) < (current_thread_info()->addr_limit.seg)) ? 0 : 1) - -#define access_ok(type,addr,size) (__range_ok(addr,size) == 0) -#define __access_ok(addr,size) (__range_ok(addr,size) == 0) - -/* - * 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 MIPS 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))) - -/* - * The "xxx_ret" versions return constant specified in third argument, if - * something bad happens. These macros can be optimized for the - * case of just returning from the function xxx_ret is used. - */ - -#define put_user_ret(x,ptr,ret) ({ \ -if (put_user(x,ptr)) return ret; }) - -#define get_user_ret(x,ptr,ret) ({ \ -if (get_user(x,ptr)) return ret; }) - -#define __put_user_ret(x,ptr,ret) ({ \ -if (__put_user(x,ptr)) return ret; }) - -#define __get_user_ret(x,ptr,ret) ({ \ -if (__get_user(x,ptr)) return ret; }) - -struct __large_struct { unsigned long buf[100]; }; -#define __m(x) (*(struct __large_struct *)(x)) #define __get_user_size(x,ptr,size,retval) \ do { \ @@ -105,26 +43,6 @@ do { \ } \ } while (0) -#define __get_user_nocheck(x,ptr,size) \ -({ \ - long __gu_err, __gu_val; \ - __get_user_size((void *)&__gu_val, (long)(ptr), \ - (size), __gu_err); \ - (x) = (__typeof__(*(ptr)))__gu_val; \ - __gu_err; \ -}) - -#define __get_user_check(x,ptr,size) \ -({ \ - long __gu_addr = (long)(ptr); \ - long __gu_err = -EFAULT, __gu_val; \ - if (__access_ok(__gu_addr, (size))) \ - __get_user_size((void *)&__gu_val, __gu_addr, \ - (size), __gu_err); \ - (x) = (__typeof__(*(ptr))) __gu_val; \ - __gu_err; \ -}) - extern long __get_user_asm_b(void *, long); extern long __get_user_asm_w(void *, long); extern long __get_user_asm_l(void *, long); @@ -152,115 +70,10 @@ do { \ } \ } while (0) -#define __put_user_nocheck(x,ptr,size) \ -({ \ - long __pu_err; \ - __typeof__(*(ptr)) __pu_val = (x); \ - __put_user_size((void *)&__pu_val, (long)(ptr), (size), __pu_err); \ - __pu_err; \ -}) - -#define __put_user_check(x,ptr,size) \ -({ \ - long __pu_err = -EFAULT; \ - long __pu_addr = (long)(ptr); \ - __typeof__(*(ptr)) __pu_val = (x); \ - \ - if (__access_ok(__pu_addr, (size))) \ - __put_user_size((void *)&__pu_val, __pu_addr, (size), __pu_err);\ - __pu_err; \ -}) - extern long __put_user_asm_b(void *, long); extern long __put_user_asm_w(void *, long); extern long __put_user_asm_l(void *, long); extern long __put_user_asm_q(void *, long); extern void __put_user_unknown(void); - -/* Generic arbitrary sized copy. */ -/* Return the number of bytes NOT copied */ -/* XXX: should be such that: 4byte and the rest. */ -extern __kernel_size_t __copy_user(void *__to, const void *__from, __kernel_size_t __n); - -#define copy_to_user_ret(to,from,n,retval) ({ \ -if (copy_to_user(to,from,n)) \ - return retval; \ -}) - -#define __copy_to_user(to,from,n) \ - __copy_user((void *)(to), \ - (void *)(from), n) - -#define __copy_to_user_ret(to,from,n,retval) ({ \ -if (__copy_to_user(to,from,n)) \ - return retval; \ -}) - -#define copy_from_user_ret(to,from,n,retval) ({ \ -if (copy_from_user(to,from,n)) \ - return retval; \ -}) - -#define __copy_from_user(to,from,n) \ - __copy_user((void *)(to), \ - (void *)(from), n) - -#define __copy_from_user_ret(to,from,n,retval) ({ \ -if (__copy_from_user(to,from,n)) \ - return retval; \ -}) - -#define __copy_to_user_inatomic __copy_to_user -#define __copy_from_user_inatomic __copy_from_user - -/* XXX: Not sure it works well.. - should be such that: 4byte clear and the rest. */ -extern __kernel_size_t __clear_user(void *addr, __kernel_size_t size); - -#define clear_user(addr,n) ({ \ -void * __cl_addr = (addr); \ -unsigned long __cl_size = (n); \ -if (__cl_size && __access_ok(((unsigned long)(__cl_addr)), __cl_size)) \ -__cl_size = __clear_user(__cl_addr, __cl_size); \ -__cl_size; }) - -extern int __strncpy_from_user(unsigned long __dest, unsigned long __src, int __count); - -#define strncpy_from_user(dest,src,count) ({ \ -unsigned long __sfu_src = (unsigned long) (src); \ -int __sfu_count = (int) (count); \ -long __sfu_res = -EFAULT; \ -if(__access_ok(__sfu_src, __sfu_count)) { \ -__sfu_res = __strncpy_from_user((unsigned long) (dest), __sfu_src, __sfu_count); \ -} __sfu_res; }) - -#define strlen_user(str) strnlen_user(str, ~0UL >> 1) - -/* - * Return the size of a string (including the ending 0!) - */ -extern long __strnlen_user(const char *__s, long __n); - -static inline long strnlen_user(const char *s, long n) -{ - if (!__addr_ok(s)) - return 0; - else - return __strnlen_user(s, n); -} - -struct exception_table_entry -{ - unsigned long insn, fixup; -}; - -#ifdef CONFIG_MMU -#define ARCH_HAS_SEARCH_EXTABLE -#endif - -/* Returns 0 if exception not found and fixup.unit otherwise. */ -extern unsigned long search_exception_table(unsigned long addr); -extern const struct exception_table_entry *search_exception_tables (unsigned long addr); - #endif /* __ASM_SH_UACCESS_64_H */ |