diff options
| -rw-r--r-- | include/asm-x86/uaccess.h | 74 | ||||
| -rw-r--r-- | include/asm-x86/uaccess_32.h | 79 | ||||
| -rw-r--r-- | include/asm-x86/uaccess_64.h | 36 |
3 files changed, 74 insertions, 115 deletions
diff --git a/include/asm-x86/uaccess.h b/include/asm-x86/uaccess.h index 4353b2267a02..3a9092af5af0 100644 --- a/include/asm-x86/uaccess.h +++ b/include/asm-x86/uaccess.h @@ -178,6 +178,12 @@ extern int __get_user_bad(void); __ret_gu; \ }) +#define __put_user_x(size, x, ptr, __ret_pu) \ + asm volatile("call __put_user_" #size : "=a" (__ret_pu) \ + :"0" ((typeof(*(ptr)))(x)), "c" (ptr) : "ebx") + + + #ifdef CONFIG_X86_32 #define __put_user_u64(x, addr, err) \ asm volatile("1: movl %%eax,0(%2)\n" \ @@ -191,13 +197,71 @@ extern int __get_user_bad(void); _ASM_EXTABLE(2b, 4b) \ : "=r" (err) \ : "A" (x), "r" (addr), "i" (-EFAULT), "0" (err)) + +#define __put_user_x8(x, ptr, __ret_pu) \ + asm volatile("call __put_user_8" : "=a" (__ret_pu) \ + : "A" ((typeof(*(ptr)))(x)), "c" (ptr) : "ebx") #else #define __put_user_u64(x, ptr, retval) \ __put_user_asm(x, ptr, retval, "q", "", "Zr", -EFAULT) +#define __put_user_x8(x, ptr, __ret_pu) __put_user_x(8, x, ptr, __ret_pu) #endif +extern void __put_user_bad(void); + +/* + * Strange magic calling convention: pointer in %ecx, + * value in %eax(:%edx), return value in %eax. clobbers %rbx + */ +extern void __put_user_1(void); +extern void __put_user_2(void); +extern void __put_user_4(void); +extern void __put_user_8(void); + #ifdef CONFIG_X86_WP_WORKS_OK +/** + * 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) \ +({ \ + int __ret_pu; \ + __typeof__(*(ptr)) __pu_val; \ + __chk_user_ptr(ptr); \ + __pu_val = x; \ + switch (sizeof(*(ptr))) { \ + case 1: \ + __put_user_x(1, __pu_val, ptr, __ret_pu); \ + break; \ + case 2: \ + __put_user_x(2, __pu_val, ptr, __ret_pu); \ + break; \ + case 4: \ + __put_user_x(4, __pu_val, ptr, __ret_pu); \ + break; \ + case 8: \ + __put_user_x8(__pu_val, ptr, __ret_pu); \ + break; \ + default: \ + __put_user_x(X, __pu_val, ptr, __ret_pu); \ + break; \ + } \ + __ret_pu; \ +}) + #define __put_user_size(x, ptr, size, retval, errret) \ do { \ retval = 0; \ @@ -231,6 +295,16 @@ do { \ retval = errret; \ } while (0) +#define put_user(x, ptr) \ +({ \ + int __ret_pu; \ + __typeof__(*(ptr))__pus_tmp = x; \ + __ret_pu = 0; \ + if (unlikely(__copy_to_user_ll(ptr, &__pus_tmp, \ + sizeof(*(ptr))) != 0)) \ + __ret_pu = -EFAULT; \ + __ret_pu; \ +}) #endif #ifdef CONFIG_X86_32 diff --git a/include/asm-x86/uaccess_32.h b/include/asm-x86/uaccess_32.h index 2c9067324d2c..e5c0437f509b 100644 --- a/include/asm-x86/uaccess_32.h +++ b/include/asm-x86/uaccess_32.h @@ -20,85 +20,6 @@ extern struct movsl_mask { } ____cacheline_aligned_in_smp movsl_mask; #endif -extern void __put_user_bad(void); - -/* - * Strange magic calling convention: pointer in %ecx, - * value in %eax(:%edx), return value in %eax, no clobbers. - */ -extern void __put_user_1(void); -extern void __put_user_2(void); -extern void __put_user_4(void); -extern void __put_user_8(void); - -#define __put_user_x(size, x, ptr, __ret_pu) \ - asm volatile("call __put_user_" #size : "=a" (__ret_pu) \ - :"0" ((typeof(*(ptr)))(x)), "c" (ptr) : "ebx") - -#define __put_user_8(x, ptr, __ret_pu) \ - asm volatile("call __put_user_8" : "=a" (__ret_pu) \ - : "A" ((typeof(*(ptr)))(x)), "c" (ptr) : "ebx") - - -/** - * 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. - */ -#ifdef CONFIG_X86_WP_WORKS_OK - -#define put_user(x, ptr) \ -({ \ - int __ret_pu; \ - __typeof__(*(ptr)) __pu_val; \ - __chk_user_ptr(ptr); \ - __pu_val = x; \ - switch (sizeof(*(ptr))) { \ - case 1: \ - __put_user_x(1, __pu_val, ptr, __ret_pu); \ - break; \ - case 2: \ - __put_user_x(2, __pu_val, ptr, __ret_pu); \ - break; \ - case 4: \ - __put_user_x(4, __pu_val, ptr, __ret_pu); \ - break; \ - case 8: \ - __put_user_8(__pu_val, ptr, __ret_pu); \ - break; \ - default: \ - __put_user_x(X, __pu_val, ptr, __ret_pu); \ - break; \ - } \ - __ret_pu; \ -}) - -#else -#define put_user(x, ptr) \ -({ \ - int __ret_pu; \ - __typeof__(*(ptr))__pus_tmp = x; \ - __ret_pu = 0; \ - if (unlikely(__copy_to_user_ll(ptr, &__pus_tmp, \ - sizeof(*(ptr))) != 0)) \ - __ret_pu = -EFAULT; \ - __ret_pu; \ -}) - - -#endif - /** * __get_user: - Get a simple variable from user space, with less checking. * @x: Variable to store result. diff --git a/include/asm-x86/uaccess_64.h b/include/asm-x86/uaccess_64.h index 9139854d37b0..2e75a5d1a17a 100644 --- a/include/asm-x86/uaccess_64.h +++ b/include/asm-x86/uaccess_64.h @@ -11,18 +11,6 @@ #define ARCH_HAS_SEARCH_EXTABLE -extern void __put_user_1(void); -extern void __put_user_2(void); -extern void __put_user_4(void); -extern void __put_user_8(void); -extern void __put_user_bad(void); - -#define __put_user_x(size, ret, x, ptr) \ - asm volatile("call __put_user_" #size \ - :"=a" (ret) \ - :"c" (ptr),"a" (x) \ - :"ebx") - #define __get_user(x, ptr) \ __get_user_nocheck((x), (ptr), sizeof(*(ptr))) #define __put_user(x, ptr) \ @@ -31,30 +19,6 @@ extern void __put_user_bad(void); #define __get_user_unaligned __get_user #define __put_user_unaligned __put_user -#define put_user(x, ptr) \ -({ \ - int __pu_err; \ - typeof(*(ptr)) __user *__pu_addr = (ptr); \ - __chk_user_ptr(ptr); \ - switch (sizeof(*(ptr))) { \ - case 1: \ - __put_user_x(1, __pu_err, x, __pu_addr); \ - break; \ - case 2: \ - __put_user_x(2, __pu_err, x, __pu_addr); \ - break; \ - case 4: \ - __put_user_x(4, __pu_err, x, __pu_addr); \ - break; \ - case 8: \ - __put_user_x(8, __pu_err, x, __pu_addr); \ - break; \ - default: \ - __put_user_bad(); \ - } \ - __pu_err; \ -}) - /* * Copy To/From Userspace */ |