diff mbox

[069/100] sparc64: Fix not SRA'ed %o5 in 32-bit traced syscall

Message ID 1381488130-30235-70-git-send-email-luis.henriques@canonical.com
State New
Headers show

Commit Message

Luis Henriques Oct. 11, 2013, 10:41 a.m. UTC 
3.5.7.23 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Kirill Tkhai <tkhai@yandex.ru>

commit ab2abda6377723e0d5fbbfe5f5aa16a5523344d1 upstream.

(From v1 to v2: changed comment)

On the way linux_sparc_syscall32->linux_syscall_trace32->goto 2f,
register %o5 doesn't clear its second 32-bit.

Fix that.

Signed-off-by: Kirill Tkhai <tkhai@yandex.ru>
CC: David Miller <davem@davemloft.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 arch/sparc/kernel/syscalls.S | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
diff mbox

Patch

diff --git a/arch/sparc/kernel/syscalls.S b/arch/sparc/kernel/syscalls.S
index 7f5f65d..817187d 100644
--- a/arch/sparc/kernel/syscalls.S
+++ b/arch/sparc/kernel/syscalls.S
@@ -147,7 +147,7 @@  linux_syscall_trace32:
 	srl	%i4, 0, %o4
 	srl	%i1, 0, %o1
 	srl	%i2, 0, %o2
-	ba,pt	%xcc, 2f
+	ba,pt	%xcc, 5f
 	 srl	%i3, 0, %o3
 
 linux_syscall_trace:
@@ -177,13 +177,13 @@  linux_sparc_syscall32:
 	srl	%i1, 0, %o1				! IEU0	Group
 	ldx	[%g6 + TI_FLAGS], %l0		! Load
 
-	srl	%i5, 0, %o5				! IEU1
+	srl	%i3, 0, %o3				! IEU0
 	srl	%i2, 0, %o2				! IEU0	Group
 	andcc	%l0, (_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT|_TIF_SYSCALL_TRACEPOINT), %g0
 	bne,pn	%icc, linux_syscall_trace32		! CTI
 	 mov	%i0, %l5				! IEU1
-	call	%l7					! CTI	Group brk forced
-	 srl	%i3, 0, %o3				! IEU0
+5:	call	%l7					! CTI	Group brk forced
+	 srl	%i5, 0, %o5				! IEU1
 	ba,a,pt	%xcc, 3f
 
 	/* Linux native system calls enter here... */