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Diffstat (limited to 'arch/nds32/include/asm/uaccess.h')
-rw-r--r--arch/nds32/include/asm/uaccess.h229
1 files changed, 119 insertions, 110 deletions
diff --git a/arch/nds32/include/asm/uaccess.h b/arch/nds32/include/asm/uaccess.h
index 18a009f3804d..362a32d9bd16 100644
--- a/arch/nds32/include/asm/uaccess.h
+++ b/arch/nds32/include/asm/uaccess.h
@@ -38,7 +38,7 @@ struct exception_table_entry {
extern int fixup_exception(struct pt_regs *regs);
#define KERNEL_DS ((mm_segment_t) { ~0UL })
-#define USER_DS ((mm_segment_t) {TASK_SIZE - 1})
+#define USER_DS ((mm_segment_t) {TASK_SIZE - 1})
#define get_ds() (KERNEL_DS)
#define get_fs() (current_thread_info()->addr_limit)
@@ -49,11 +49,11 @@ static inline void set_fs(mm_segment_t fs)
current_thread_info()->addr_limit = fs;
}
-#define segment_eq(a, b) ((a) == (b))
+#define segment_eq(a, b) ((a) == (b))
#define __range_ok(addr, size) (size <= get_fs() && addr <= (get_fs() -size))
-#define access_ok(type, addr, size) \
+#define access_ok(type, addr, size) \
__range_ok((unsigned long)addr, (unsigned long)size)
/*
* Single-value transfer routines. They automatically use the right
@@ -75,70 +75,73 @@ static inline void set_fs(mm_segment_t fs)
* versions are void (ie, don't return a value as such).
*/
-#define get_user(x,p) \
-({ \
- long __e = -EFAULT; \
- if(likely(access_ok(VERIFY_READ, p, sizeof(*p)))) { \
- __e = __get_user(x,p); \
- } else \
- x = 0; \
- __e; \
-})
-#define __get_user(x,ptr) \
+#define get_user __get_user \
+
+#define __get_user(x, ptr) \
({ \
long __gu_err = 0; \
- __get_user_err((x),(ptr),__gu_err); \
+ __get_user_check((x), (ptr), __gu_err); \
__gu_err; \
})
-#define __get_user_error(x,ptr,err) \
+#define __get_user_error(x, ptr, err) \
({ \
- __get_user_err((x),(ptr),err); \
- (void) 0; \
+ __get_user_check((x), (ptr), (err)); \
+ (void)0; \
})
-#define __get_user_err(x,ptr,err) \
+#define __get_user_check(x, ptr, err) \
+({ \
+ const __typeof__(*(ptr)) __user *__p = (ptr); \
+ might_fault(); \
+ if (access_ok(VERIFY_READ, __p, sizeof(*__p))) { \
+ __get_user_err((x), __p, (err)); \
+ } else { \
+ (x) = 0; (err) = -EFAULT; \
+ } \
+})
+
+#define __get_user_err(x, ptr, err) \
do { \
- unsigned long __gu_addr = (unsigned long)(ptr); \
unsigned long __gu_val; \
__chk_user_ptr(ptr); \
switch (sizeof(*(ptr))) { \
case 1: \
- __get_user_asm("lbi",__gu_val,__gu_addr,err); \
+ __get_user_asm("lbi", __gu_val, (ptr), (err)); \
break; \
case 2: \
- __get_user_asm("lhi",__gu_val,__gu_addr,err); \
+ __get_user_asm("lhi", __gu_val, (ptr), (err)); \
break; \
case 4: \
- __get_user_asm("lwi",__gu_val,__gu_addr,err); \
+ __get_user_asm("lwi", __gu_val, (ptr), (err)); \
break; \
case 8: \
- __get_user_asm_dword(__gu_val,__gu_addr,err); \
+ __get_user_asm_dword(__gu_val, (ptr), (err)); \
break; \
default: \
BUILD_BUG(); \
break; \
} \
- (x) = (__typeof__(*(ptr)))__gu_val; \
+ (x) = (__force __typeof__(*(ptr)))__gu_val; \
} while (0)
-#define __get_user_asm(inst,x,addr,err) \
- asm volatile( \
- "1: "inst" %1,[%2]\n" \
- "2:\n" \
- " .section .fixup,\"ax\"\n" \
- " .align 2\n" \
- "3: move %0, %3\n" \
- " move %1, #0\n" \
- " b 2b\n" \
- " .previous\n" \
- " .section __ex_table,\"a\"\n" \
- " .align 3\n" \
- " .long 1b, 3b\n" \
- " .previous" \
- : "+r" (err), "=&r" (x) \
- : "r" (addr), "i" (-EFAULT) \
- : "cc")
+#define __get_user_asm(inst, x, addr, err) \
+ __asm__ __volatile__ ( \
+ "1: "inst" %1,[%2]\n" \
+ "2:\n" \
+ " .section .fixup,\"ax\"\n" \
+ " .align 2\n" \
+ "3: move %0, %3\n" \
+ " move %1, #0\n" \
+ " b 2b\n" \
+ " .previous\n" \
+ " .section __ex_table,\"a\"\n" \
+ " .align 3\n" \
+ " .long 1b, 3b\n" \
+ " .previous" \
+ : "+r" (err), "=&r" (x) \
+ : "r" (addr), "i" (-EFAULT) \
+ : "cc")
#ifdef __NDS32_EB__
#define __gu_reg_oper0 "%H1"
@@ -149,61 +152,66 @@ do { \
#endif
#define __get_user_asm_dword(x, addr, err) \
- asm volatile( \
- "\n1:\tlwi " __gu_reg_oper0 ",[%2]\n" \
- "\n2:\tlwi " __gu_reg_oper1 ",[%2+4]\n" \
- "3:\n" \
- " .section .fixup,\"ax\"\n" \
- " .align 2\n" \
- "4: move %0, %3\n" \
- " b 3b\n" \
- " .previous\n" \
- " .section __ex_table,\"a\"\n" \
- " .align 3\n" \
- " .long 1b, 4b\n" \
- " .long 2b, 4b\n" \
- " .previous" \
- : "+r"(err), "=&r"(x) \
- : "r"(addr), "i"(-EFAULT) \
- : "cc")
-#define put_user(x,p) \
-({ \
- long __e = -EFAULT; \
- if(likely(access_ok(VERIFY_WRITE, p, sizeof(*p)))) { \
- __e = __put_user(x,p); \
- } \
- __e; \
-})
-#define __put_user(x,ptr) \
+ __asm__ __volatile__ ( \
+ "\n1:\tlwi " __gu_reg_oper0 ",[%2]\n" \
+ "\n2:\tlwi " __gu_reg_oper1 ",[%2+4]\n" \
+ "3:\n" \
+ " .section .fixup,\"ax\"\n" \
+ " .align 2\n" \
+ "4: move %0, %3\n" \
+ " b 3b\n" \
+ " .previous\n" \
+ " .section __ex_table,\"a\"\n" \
+ " .align 3\n" \
+ " .long 1b, 4b\n" \
+ " .long 2b, 4b\n" \
+ " .previous" \
+ : "+r"(err), "=&r"(x) \
+ : "r"(addr), "i"(-EFAULT) \
+ : "cc")
+
+#define put_user __put_user \
+
+#define __put_user(x, ptr) \
({ \
long __pu_err = 0; \
- __put_user_err((x),(ptr),__pu_err); \
+ __put_user_err((x), (ptr), __pu_err); \
__pu_err; \
})
-#define __put_user_error(x,ptr,err) \
+#define __put_user_error(x, ptr, err) \
+({ \
+ __put_user_err((x), (ptr), (err)); \
+ (void)0; \
+})
+
+#define __put_user_check(x, ptr, err) \
({ \
- __put_user_err((x),(ptr),err); \
- (void) 0; \
+ __typeof__(*(ptr)) __user *__p = (ptr); \
+ might_fault(); \
+ if (access_ok(VERIFY_WRITE, __p, sizeof(*__p))) { \
+ __put_user_err((x), __p, (err)); \
+ } else { \
+ (err) = -EFAULT; \
+ } \
})
-#define __put_user_err(x,ptr,err) \
+#define __put_user_err(x, ptr, err) \
do { \
- unsigned long __pu_addr = (unsigned long)(ptr); \
__typeof__(*(ptr)) __pu_val = (x); \
__chk_user_ptr(ptr); \
switch (sizeof(*(ptr))) { \
case 1: \
- __put_user_asm("sbi",__pu_val,__pu_addr,err); \
+ __put_user_asm("sbi", __pu_val, (ptr), (err)); \
break; \
case 2: \
- __put_user_asm("shi",__pu_val,__pu_addr,err); \
+ __put_user_asm("shi", __pu_val, (ptr), (err)); \
break; \
case 4: \
- __put_user_asm("swi",__pu_val,__pu_addr,err); \
+ __put_user_asm("swi", __pu_val, (ptr), (err)); \
break; \
case 8: \
- __put_user_asm_dword(__pu_val,__pu_addr,err); \
+ __put_user_asm_dword(__pu_val, (ptr), (err)); \
break; \
default: \
BUILD_BUG(); \
@@ -211,22 +219,22 @@ do { \
} \
} while (0)
-#define __put_user_asm(inst,x,addr,err) \
- asm volatile( \
- "1: "inst" %1,[%2]\n" \
- "2:\n" \
- " .section .fixup,\"ax\"\n" \
- " .align 2\n" \
- "3: move %0, %3\n" \
- " b 2b\n" \
- " .previous\n" \
- " .section __ex_table,\"a\"\n" \
- " .align 3\n" \
- " .long 1b, 3b\n" \
- " .previous" \
- : "+r" (err) \
- : "r" (x), "r" (addr), "i" (-EFAULT) \
- : "cc")
+#define __put_user_asm(inst, x, addr, err) \
+ __asm__ __volatile__ ( \
+ "1: "inst" %1,[%2]\n" \
+ "2:\n" \
+ " .section .fixup,\"ax\"\n" \
+ " .align 2\n" \
+ "3: move %0, %3\n" \
+ " b 2b\n" \
+ " .previous\n" \
+ " .section __ex_table,\"a\"\n" \
+ " .align 3\n" \
+ " .long 1b, 3b\n" \
+ " .previous" \
+ : "+r" (err) \
+ : "r" (x), "r" (addr), "i" (-EFAULT) \
+ : "cc")
#ifdef __NDS32_EB__
#define __pu_reg_oper0 "%H2"
@@ -237,23 +245,24 @@ do { \
#endif
#define __put_user_asm_dword(x, addr, err) \
- asm volatile( \
- "\n1:\tswi " __pu_reg_oper0 ",[%1]\n" \
- "\n2:\tswi " __pu_reg_oper1 ",[%1+4]\n" \
- "3:\n" \
- " .section .fixup,\"ax\"\n" \
- " .align 2\n" \
- "4: move %0, %3\n" \
- " b 3b\n" \
- " .previous\n" \
- " .section __ex_table,\"a\"\n" \
- " .align 3\n" \
- " .long 1b, 4b\n" \
- " .long 2b, 4b\n" \
- " .previous" \
- : "+r"(err) \
- : "r"(addr), "r"(x), "i"(-EFAULT) \
- : "cc")
+ __asm__ __volatile__ ( \
+ "\n1:\tswi " __pu_reg_oper0 ",[%1]\n" \
+ "\n2:\tswi " __pu_reg_oper1 ",[%1+4]\n" \
+ "3:\n" \
+ " .section .fixup,\"ax\"\n" \
+ " .align 2\n" \
+ "4: move %0, %3\n" \
+ " b 3b\n" \
+ " .previous\n" \
+ " .section __ex_table,\"a\"\n" \
+ " .align 3\n" \
+ " .long 1b, 4b\n" \
+ " .long 2b, 4b\n" \
+ " .previous" \
+ : "+r"(err) \
+ : "r"(addr), "r"(x), "i"(-EFAULT) \
+ : "cc")
+
extern unsigned long __arch_clear_user(void __user * addr, unsigned long n);
extern long strncpy_from_user(char *dest, const char __user * src, long count);
extern __must_check long strlen_user(const char __user * str);
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