From: Guo Ren <guoren@xxxxxxxxxxxxxxxxx> 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 <guoren@xxxxxxxxxxxxxxxxx> Cc: Arnd Bergmann <arnd@xxxxxxxx> --- 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
