diff options
Diffstat (limited to 'arch/riscv/include/asm')
| -rw-r--r-- | arch/riscv/include/asm/uaccess.h | 94 |
1 files changed, 52 insertions, 42 deletions
diff --git a/arch/riscv/include/asm/uaccess.h b/arch/riscv/include/asm/uaccess.h index e8eedf22e907..b67d1c616ec3 100644 --- a/arch/riscv/include/asm/uaccess.h +++ b/arch/riscv/include/asm/uaccess.h @@ -107,7 +107,6 @@ static inline int __access_ok(unsigned long addr, unsigned long size) do { \ uintptr_t __tmp; \ __typeof__(x) __x; \ - __enable_user_access(); \ __asm__ __volatile__ ( \ "1:\n" \ " " insn " %1, %3\n" \ @@ -125,7 +124,6 @@ do { \ " .previous" \ : "+r" (err), "=&r" (__x), "=r" (__tmp) \ : "m" (*(ptr)), "i" (-EFAULT)); \ - __disable_user_access(); \ (x) = __x; \ } while (0) @@ -138,7 +136,6 @@ do { \ u32 __user *__ptr = (u32 __user *)(ptr); \ u32 __lo, __hi; \ uintptr_t __tmp; \ - __enable_user_access(); \ __asm__ __volatile__ ( \ "1:\n" \ " lw %1, %4\n" \ @@ -162,12 +159,30 @@ do { \ "=r" (__tmp) \ : "m" (__ptr[__LSW]), "m" (__ptr[__MSW]), \ "i" (-EFAULT)); \ - __disable_user_access(); \ (x) = (__typeof__(x))((__typeof__((x)-(x)))( \ (((u64)__hi << 32) | __lo))); \ } while (0) #endif /* CONFIG_64BIT */ +#define __get_user_nocheck(x, __gu_ptr, __gu_err) \ +do { \ + switch (sizeof(*__gu_ptr)) { \ + case 1: \ + __get_user_asm("lb", (x), __gu_ptr, __gu_err); \ + break; \ + case 2: \ + __get_user_asm("lh", (x), __gu_ptr, __gu_err); \ + break; \ + case 4: \ + __get_user_asm("lw", (x), __gu_ptr, __gu_err); \ + break; \ + case 8: \ + __get_user_8((x), __gu_ptr, __gu_err); \ + break; \ + default: \ + BUILD_BUG(); \ + } \ +} while (0) /** * __get_user: - Get a simple variable from user space, with less checking. @@ -191,25 +206,15 @@ do { \ */ #define __get_user(x, ptr) \ ({ \ - register long __gu_err = 0; \ const __typeof__(*(ptr)) __user *__gu_ptr = (ptr); \ + long __gu_err = 0; \ + \ __chk_user_ptr(__gu_ptr); \ - switch (sizeof(*__gu_ptr)) { \ - case 1: \ - __get_user_asm("lb", (x), __gu_ptr, __gu_err); \ - break; \ - case 2: \ - __get_user_asm("lh", (x), __gu_ptr, __gu_err); \ - break; \ - case 4: \ - __get_user_asm("lw", (x), __gu_ptr, __gu_err); \ - break; \ - case 8: \ - __get_user_8((x), __gu_ptr, __gu_err); \ - break; \ - default: \ - BUILD_BUG(); \ - } \ + \ + __enable_user_access(); \ + __get_user_nocheck(x, __gu_ptr, __gu_err); \ + __disable_user_access(); \ + \ __gu_err; \ }) @@ -243,7 +248,6 @@ do { \ do { \ uintptr_t __tmp; \ __typeof__(*(ptr)) __x = x; \ - __enable_user_access(); \ __asm__ __volatile__ ( \ "1:\n" \ " " insn " %z3, %2\n" \ @@ -260,7 +264,6 @@ do { \ " .previous" \ : "+r" (err), "=r" (__tmp), "=m" (*(ptr)) \ : "rJ" (__x), "i" (-EFAULT)); \ - __disable_user_access(); \ } while (0) #ifdef CONFIG_64BIT @@ -272,7 +275,6 @@ do { \ u32 __user *__ptr = (u32 __user *)(ptr); \ u64 __x = (__typeof__((x)-(x)))(x); \ uintptr_t __tmp; \ - __enable_user_access(); \ __asm__ __volatile__ ( \ "1:\n" \ " sw %z4, %2\n" \ @@ -294,10 +296,28 @@ do { \ "=m" (__ptr[__LSW]), \ "=m" (__ptr[__MSW]) \ : "rJ" (__x), "rJ" (__x >> 32), "i" (-EFAULT)); \ - __disable_user_access(); \ } while (0) #endif /* CONFIG_64BIT */ +#define __put_user_nocheck(x, __gu_ptr, __pu_err) \ +do { \ + switch (sizeof(*__gu_ptr)) { \ + case 1: \ + __put_user_asm("sb", (x), __gu_ptr, __pu_err); \ + break; \ + case 2: \ + __put_user_asm("sh", (x), __gu_ptr, __pu_err); \ + break; \ + case 4: \ + __put_user_asm("sw", (x), __gu_ptr, __pu_err); \ + break; \ + case 8: \ + __put_user_8((x), __gu_ptr, __pu_err); \ + break; \ + default: \ + BUILD_BUG(); \ + } \ +} while (0) /** * __put_user: - Write a simple value into user space, with less checking. @@ -320,25 +340,15 @@ do { \ */ #define __put_user(x, ptr) \ ({ \ - register long __pu_err = 0; \ __typeof__(*(ptr)) __user *__gu_ptr = (ptr); \ + long __pu_err = 0; \ + \ __chk_user_ptr(__gu_ptr); \ - switch (sizeof(*__gu_ptr)) { \ - case 1: \ - __put_user_asm("sb", (x), __gu_ptr, __pu_err); \ - break; \ - case 2: \ - __put_user_asm("sh", (x), __gu_ptr, __pu_err); \ - break; \ - case 4: \ - __put_user_asm("sw", (x), __gu_ptr, __pu_err); \ - break; \ - case 8: \ - __put_user_8((x), __gu_ptr, __pu_err); \ - break; \ - default: \ - BUILD_BUG(); \ - } \ + \ + __enable_user_access(); \ + __put_user_nocheck(x, __gu_ptr, __pu_err); \ + __disable_user_access(); \ + \ __pu_err; \ }) |