From 23b7d672afa903534e38e00570249c56d4d1f70d Mon Sep 17 00:00:00 2001 From: Russell King Date: Fri, 3 Dec 2004 22:22:04 +0000 Subject: [ARM] Ensure user ops pass 64-bit constants in even,odd registers. Always pass values to get_user and put_user in an even numbered register, and optionally the next odd numbered register. This ensures that we are compatible with compiler enhancements. --- include/asm-arm/uaccess.h | 34 +++++++++++++++++----------------- 1 file changed, 17 insertions(+), 17 deletions(-) (limited to 'include') diff --git a/include/asm-arm/uaccess.h b/include/asm-arm/uaccess.h index f36715246407..abda6082b5cb 100644 --- a/include/asm-arm/uaccess.h +++ b/include/asm-arm/uaccess.h @@ -108,35 +108,35 @@ extern int __get_user_4(void *); extern int __get_user_8(void *); extern int __get_user_bad(void); -#define __get_user_x(__r1,__p,__e,__s,__i...) \ +#define __get_user_x(__r2,__p,__e,__s,__i...) \ __asm__ __volatile__ ( \ - __asmeq("%0", "r0") __asmeq("%1", "r1") \ + __asmeq("%0", "r0") __asmeq("%1", "r2") \ "bl __get_user_" #__s \ - : "=&r" (__e), "=r" (__r1) \ + : "=&r" (__e), "=r" (__r2) \ : "0" (__p) \ : __i, "cc") #define get_user(x,p) \ ({ \ const register typeof(*(p)) __user *__p asm("r0") = (p);\ - register typeof(*(p)) __r1 asm("r1"); \ + register typeof(*(p)) __r2 asm("r2"); \ register int __e asm("r0"); \ switch (sizeof(*(__p))) { \ case 1: \ - __get_user_x(__r1, __p, __e, 1, "lr"); \ + __get_user_x(__r2, __p, __e, 1, "lr"); \ break; \ case 2: \ - __get_user_x(__r1, __p, __e, 2, "r2", "lr"); \ + __get_user_x(__r2, __p, __e, 2, "r3", "lr"); \ break; \ case 4: \ - __get_user_x(__r1, __p, __e, 4, "lr"); \ + __get_user_x(__r2, __p, __e, 4, "lr"); \ break; \ case 8: \ - __get_user_x(__r1, __p, __e, 8, "lr"); \ + __get_user_x(__r2, __p, __e, 8, "lr"); \ break; \ default: __e = __get_user_bad(); break; \ } \ - x = __r1; \ + x = __r2; \ __e; \ }) @@ -227,31 +227,31 @@ extern int __put_user_4(void *, unsigned int); extern int __put_user_8(void *, unsigned long long); extern int __put_user_bad(void); -#define __put_user_x(__r1,__p,__e,__s) \ +#define __put_user_x(__r2,__p,__e,__s) \ __asm__ __volatile__ ( \ - __asmeq("%0", "r0") __asmeq("%2", "r1") \ + __asmeq("%0", "r0") __asmeq("%2", "r2") \ "bl __put_user_" #__s \ : "=&r" (__e) \ - : "0" (__p), "r" (__r1) \ + : "0" (__p), "r" (__r2) \ : "ip", "lr", "cc") #define put_user(x,p) \ ({ \ - const register typeof(*(p)) __r1 asm("r1") = (x); \ + const register typeof(*(p)) __r2 asm("r2") = (x); \ const register typeof(*(p)) __user *__p asm("r0") = (p);\ register int __e asm("r0"); \ switch (sizeof(*(__p))) { \ case 1: \ - __put_user_x(__r1, __p, __e, 1); \ + __put_user_x(__r2, __p, __e, 1); \ break; \ case 2: \ - __put_user_x(__r1, __p, __e, 2); \ + __put_user_x(__r2, __p, __e, 2); \ break; \ case 4: \ - __put_user_x(__r1, __p, __e, 4); \ + __put_user_x(__r2, __p, __e, 4); \ break; \ case 8: \ - __put_user_x(__r1, __p, __e, 8); \ + __put_user_x(__r2, __p, __e, 8); \ break; \ default: __e = __put_user_bad(); break; \ } \ -- cgit v1.2.3