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Subject[PATCH] ARM: check stmfd instruction using right shift
Date
From: Lvqiang Huang <Lvqiang.Huang@unisoc.com>

In the commit ef41b5c92498 ("ARM: make kernel oops easier to read"),
- .word 0xe92d0000 >> 10 @ stmfd sp!, {}
+ .word 0xe92d0000 >> 11 @ stmfd sp!, {}
then the shift need to change to 11.

Fixes: ef41b5c92498 ("ARM: make kernel oops easier to read")
Signed-off-by: Lvqiang Huang <Lvqiang.Huang@unisoc.com>
Signed-off-by: Chunyan Zhang <zhang.lyra@gmail.com>
---
arch/arm/lib/backtrace.S | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/lib/backtrace.S b/arch/arm/lib/backtrace.S
index 7d7952e..926851b 100644
--- a/arch/arm/lib/backtrace.S
+++ b/arch/arm/lib/backtrace.S
@@ -70,7 +70,7 @@ for_each_frame: tst frame, mask @ Check for address exceptions

1003: ldr r2, [sv_pc, #-4] @ if stmfd sp!, {args} exists,
ldr r3, .Ldsi+4 @ adjust saved 'pc' back one
- teq r3, r2, lsr #10 @ instruction
+ teq r3, r2, lsr #11 @ instruction
subne r0, sv_pc, #4 @ allow for mov
subeq r0, sv_pc, #8 @ allow for mov + stmia

--
1.7.9.5
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