From: Guo Ren <guo...@linux.alibaba.com>
The "Changing Execution Path" section in the Documentation/kprobes.txt
said:
Since kprobes can probe into a running kernel code, it can change the
register set, including instruction pointer.
Signed-off-by: Guo Ren <guo...@linux.alibaba.com>
Cc: Arnd Bergmann <a...@arndb.de>
---
arch/csky/abiv2/mcount.S | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/csky/abiv2/mcount.S b/arch/csky/abiv2/mcount.S
index 911512b..d745e10 100644
--- a/arch/csky/abiv2/mcount.S
+++ b/arch/csky/abiv2/mcount.S
@@ -55,7 +55,9 @@
.macro mcount_exit_regs
RESTORE_REGS_FTRACE
- ldw t1, (sp, 0)
+ subi sp, 152
+ ldw t1, (sp, 4)
+ addi sp, 152
ldw r8, (sp, 4)
ldw lr, (sp, 8)
addi sp, 12
--
2.7.4
