Hi,
The subjet is misleading. This isn't powerpc but only powerpc/64, and
this is not memcpy() but memcpy_mcsafe()
Christophe
Le 03/09/2019 à 23:43, Santosh Sivaraj a écrit :
For sizes lesser than 128 bytes, the code branches out early without saving
the stack frame, which when restored later drops frame of the caller.
Tested-by: Aneesh Kumar K.V <aneesh.ku...@linux.ibm.com>
Signed-off-by: Santosh Sivaraj <sant...@fossix.org>
---
arch/powerpc/lib/memcpy_mcsafe_64.S | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/lib/memcpy_mcsafe_64.S
b/arch/powerpc/lib/memcpy_mcsafe_64.S
index 949976dc115d..cb882d9a6d8a 100644
--- a/arch/powerpc/lib/memcpy_mcsafe_64.S
+++ b/arch/powerpc/lib/memcpy_mcsafe_64.S
@@ -84,7 +84,6 @@ err1; stw r0,0(r3)
3: sub r5,r5,r6
cmpldi r5,128
- blt 5f
mflr r0
stdu r1,-STACKFRAMESIZE(r1)
@@ -99,6 +98,7 @@ err1; stw r0,0(r3)
std r22,STK_REG(R22)(r1)
std r0,STACKFRAMESIZE+16(r1)
+ blt 5f
srdi r6,r5,7
mtctr r6
