diff options
| -rw-r--r-- | arch/microblaze/include/asm/uaccess.h | 212 | ||||
| -rw-r--r-- | arch/microblaze/lib/Makefile | 1 | ||||
| -rw-r--r-- | arch/microblaze/lib/uaccess.c | 48 |
3 files changed, 61 insertions, 200 deletions
diff --git a/arch/microblaze/include/asm/uaccess.h b/arch/microblaze/include/asm/uaccess.h index 4f17950..34b79fe 100644 --- a/arch/microblaze/include/asm/uaccess.h +++ b/arch/microblaze/include/asm/uaccess.h @@ -111,9 +111,6 @@ static inline int ___range_ok(unsigned long addr, unsigned long size) # define __EX_TABLE_SECTION ".section .discard,\"a\"\n" #endif -extern unsigned long __copy_tofrom_user(void __user *to, - const void __user *from, unsigned long size); - /* Return: number of not copied bytes, i.e. 0 if OK or non-zero if fail. */ static inline unsigned long __must_check __clear_user(void __user *to, unsigned long n) @@ -144,8 +141,7 @@ static inline unsigned long __must_check clear_user(void __user *to, return __clear_user(to, n); } -#ifndef CONFIG_MMU - +/* put_user and get_user macros */ extern long __user_bad(void); #define __get_user_asm(insn, __gu_ptr, __gu_val, __gu_err) \ @@ -251,6 +247,23 @@ extern long __user_bad(void); ); \ }) +/** + * put_user: - Write a simple value into user space. + * @x: Value to copy to user space. + * @ptr: Destination address, in user space. + * + * Context: User context only. This function may sleep. + * + * This macro copies a single simple value from kernel space to user + * space. It supports simple types like char and int, but not larger + * data types like structures or arrays. + * + * @ptr must have pointer-to-simple-variable type, and @x must be assignable + * to the result of dereferencing @ptr. + * + * Returns zero on success, or -EFAULT on error. + */ + #define __put_user(x, ptr) \ ({ \ __typeof__(*(ptr)) volatile __gu_val = (x); \ @@ -274,8 +287,48 @@ extern long __user_bad(void); __gu_err; \ }) +#ifndef CONFIG_MMU + #define put_user(x, ptr) __put_user((x), (ptr)) +static inline long strnlen_user(const char __user *src, long count) +{ + return strlen(src) + 1; +} + +#define __do_strncpy_from_user(dst, src, count, res) \ + do { \ + char *tmp; \ + strncpy(dst, src, count); \ + for (tmp = dst; *tmp && count > 0; tmp++, count--) \ + ; \ + res = (tmp - dst); \ + } while (0) + +static inline long __strncpy_from_user(char *dst, + const char __user *src, long count) +{ + long res; + __do_strncpy_from_user(dst, src, count, res); + return res; +} + +static inline long strncpy_from_user(char *dst, + const char __user *src, long count) +{ + long res = -EFAULT; + if (access_ok(VERIFY_READ, src, 1)) + __do_strncpy_from_user(dst, src, count, res); + return res; +} + +static inline unsigned long __copy_tofrom_user(void __user *to, + const void __user *from, unsigned long size) +{ + memcpy(to, from, size); + return 0; +} + #define copy_to_user(to, from, n) (memcpy((to), (from), (n)), 0) #define copy_from_user(to, from, n) (memcpy((to), (from), (n)), 0) @@ -291,158 +344,15 @@ extern long strnlen_user(const char *src, long count); #else /* CONFIG_MMU */ -/* put_user and get_user macros */ - -extern long __user_bad(void); - -#define __get_user_asm(insn, __gu_ptr, __gu_val, __gu_err) \ -({ \ - __asm__ __volatile__ ( \ - "1:" insn " %1, %2, r0;" \ - " addk %0, r0, r0;" \ - "2: " \ - __FIXUP_SECTION \ - "3: brid 2b; " \ - " addik %0, r0, %3;" \ - ".previous;" \ - __EX_TABLE_SECTION \ - ".word 1b,3b;" \ - ".previous;" \ - : "=&r"(__gu_err), "=r"(__gu_val) \ - : "r"(__gu_ptr), "i"(-EFAULT) \ - ); \ -}) - -#define __get_user(x, ptr) \ -({ \ - unsigned long __gu_val; \ - /*unsigned long __gu_ptr = (unsigned long)(ptr);*/ \ - long __gu_err; \ - switch (sizeof(*(ptr))) { \ - case 1: \ - __get_user_asm("lbu", (ptr), __gu_val, __gu_err); \ - break; \ - case 2: \ - __get_user_asm("lhu", (ptr), __gu_val, __gu_err); \ - break; \ - case 4: \ - __get_user_asm("lw", (ptr), __gu_val, __gu_err); \ - break; \ - default: \ - /* __gu_val = 0; __gu_err = -EINVAL;*/ __gu_err = __user_bad();\ - } \ - x = (__typeof__(*(ptr))) __gu_val; \ - __gu_err; \ -}) - -/** - * get_user: - Get a simple variable from user space. - * @x: Variable to store result. - * @ptr: Source address, in user space. - * - * Context: User context only. This function may sleep. - * - * This macro copies a single simple variable from user space to kernel - * space. It supports simple types like char and int, but not larger - * data types like structures or arrays. - * - * @ptr must have pointer-to-simple-variable type, and the result of - * dereferencing @ptr must be assignable to @x without a cast. - * - * Returns zero on success, or -EFAULT on error. - * On error, the variable @x is set to zero. - */ - -#define get_user(x, ptr) \ -({ \ - access_ok(VERIFY_READ, (ptr), sizeof(*(ptr))) \ - ? __get_user((x), (ptr)) : -EFAULT; \ -}) - -/** - * put_user: - Write a simple value into user space. - * @x: Value to copy to user space. - * @ptr: Destination address, in user space. - * - * Context: User context only. This function may sleep. - * - * This macro copies a single simple value from kernel space to user - * space. It supports simple types like char and int, but not larger - * data types like structures or arrays. - * - * @ptr must have pointer-to-simple-variable type, and @x must be assignable - * to the result of dereferencing @ptr. - * - * Returns zero on success, or -EFAULT on error. - */ - -#define __put_user_asm(insn, __gu_ptr, __gu_val, __gu_err) \ -({ \ - __asm__ __volatile__ ( \ - "1:" insn " %1, %2, r0;" \ - " addk %0, r0, r0;" \ - "2: " \ - __FIXUP_SECTION \ - "3: brid 2b;" \ - " addik %0, r0, %3;" \ - ".previous;" \ - __EX_TABLE_SECTION \ - ".word 1b,3b;" \ - ".previous;" \ - : "=&r"(__gu_err) \ - : "r"(__gu_val), "r"(__gu_ptr), "i"(-EFAULT) \ - ); \ -}) - -#define __put_user_asm_8(__gu_ptr, __gu_val, __gu_err) \ -({ \ - __asm__ __volatile__ (" lwi %0, %1, 0;" \ - "1: swi %0, %2, 0;" \ - " lwi %0, %1, 4;" \ - "2: swi %0, %2, 4;" \ - " addk %0, r0, r0;" \ - "3: " \ - __FIXUP_SECTION \ - "4: brid 3b;" \ - " addik %0, r0, %3;" \ - ".previous;" \ - __EX_TABLE_SECTION \ - ".word 1b,4b,2b,4b;" \ - ".previous;" \ - : "=&r"(__gu_err) \ - : "r"(&__gu_val), "r"(__gu_ptr), "i"(-EFAULT) \ - ); \ -}) - -#define __put_user(x, ptr) \ -({ \ - __typeof__(*(ptr)) volatile __gu_val = (x); \ - long __gu_err = 0; \ - switch (sizeof(__gu_val)) { \ - case 1: \ - __put_user_asm("sb", (ptr), __gu_val, __gu_err); \ - break; \ - case 2: \ - __put_user_asm("sh", (ptr), __gu_val, __gu_err); \ - break; \ - case 4: \ - __put_user_asm("sw", (ptr), __gu_val, __gu_err); \ - break; \ - case 8: \ - __put_user_asm_8((ptr), __gu_val, __gu_err); \ - break; \ - default: \ - /*__gu_err = -EINVAL;*/ __gu_err = __user_bad(); \ - } \ - __gu_err; \ -}) - #define put_user(x, ptr) \ ({ \ access_ok(VERIFY_WRITE, (ptr), sizeof(*(ptr))) \ ? __put_user((x), (ptr)) : -EFAULT; \ }) +extern unsigned long __copy_tofrom_user(void __user *to, + const void __user *from, unsigned long size); + #define __copy_from_user(to, from, n) \ __copy_tofrom_user((__force void __user *)(to), \ (void __user *)(from), (n)) diff --git a/arch/microblaze/lib/Makefile b/arch/microblaze/lib/Makefile index b579db06..59322a2 100644 --- a/arch/microblaze/lib/Makefile +++ b/arch/microblaze/lib/Makefile @@ -10,5 +10,4 @@ else lib-y += memcpy.o memmove.o endif -lib-$(CONFIG_NO_MMU) += uaccess.o lib-$(CONFIG_MMU) += uaccess_old.o diff --git a/arch/microblaze/lib/uaccess.c b/arch/microblaze/lib/uaccess.c deleted file mode 100644 index a853fe0..0000000 --- a/arch/microblaze/lib/uaccess.c +++ /dev/null @@ -1,48 +0,0 @@ -/* - * Copyright (C) 2006 Atmark Techno, Inc. - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - */ - -#include <linux/string.h> -#include <asm/uaccess.h> - -#include <asm/bug.h> - -long strnlen_user(const char __user *src, long count) -{ - return strlen(src) + 1; -} - -#define __do_strncpy_from_user(dst, src, count, res) \ - do { \ - char *tmp; \ - strncpy(dst, src, count); \ - for (tmp = dst; *tmp && count > 0; tmp++, count--) \ - ; \ - res = (tmp - dst); \ - } while (0) - -long __strncpy_from_user(char *dst, const char __user *src, long count) -{ - long res; - __do_strncpy_from_user(dst, src, count, res); - return res; -} - -long strncpy_from_user(char *dst, const char __user *src, long count) -{ - long res = -EFAULT; - if (access_ok(VERIFY_READ, src, 1)) - __do_strncpy_from_user(dst, src, count, res); - return res; -} - -unsigned long __copy_tofrom_user(void __user *to, - const void __user *from, unsigned long size) -{ - memcpy(to, from, size); - return 0; -} |
