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Commit d2ad824f authored by Helge Deller's avatar Helge Deller
Browse files

parisc: Add 64bit get_user() and put_user() for 32bit kernel 



Allow accessing 64-bit values in userspace from a 32-bit kernel.
The access is not atomic.

Signed-off-by: default avatarHelge Deller <deller@gmx.de>
parent 06bff6b9

arch/parisc/include/asm/uaccess.h

+15 −1
Original line number Diff line number Diff line
@@ -40,7 +40,7 @@ static inline long access_ok(int type, const void __user * addr, 
#define get_user __get_user



#if !defined(CONFIG_64BIT)

#define LDD_USER(ptr)		BUILD_BUG()

#define LDD_USER(ptr)		__get_user_asm64(ptr)

#define STD_USER(x, ptr)	__put_user_asm64(x, ptr)

#else

#define LDD_USER(ptr)		__get_user_asm("ldd", ptr)
@@ -114,6 +114,20 @@ struct exception_data { 
		: "r"(ptr), "1"(__gu_err)		\

		: "r1");



#if !defined(CONFIG_64BIT)



#define __get_user_asm64(ptr) 				\

	__asm__("\n1:\tldw 0(%%sr2,%2),%0"		\

		"\n2:\tldw 4(%%sr2,%2),%R0\n\t"		\

		ASM_EXCEPTIONTABLE_ENTRY(1b, fixup_get_user_skip_2)\

		ASM_EXCEPTIONTABLE_ENTRY(2b, fixup_get_user_skip_1)\

		: "=r"(__gu_val), "=r"(__gu_err)	\

		: "r"(ptr), "1"(__gu_err)		\

		: "r1");



#endif /* !defined(CONFIG_64BIT) */





#define __put_user(x, ptr)                                      \

({								\

	register long __pu_err __asm__ ("r8") = 0;      	\