From: Guo Ren <[email protected]> [ Upstream commit 131aee8b9807bc98379fa5a0270389dbc7dcec90 ]
When STACKTRACE is enabled, we must pass fp as stack for unwind, otherwise random value in stack will casue a dead loop. Signed-off-by: Guo Ren <[email protected]> Reported-by: Lu Baoquan <[email protected]> Signed-off-by: Sasha Levin <[email protected]> --- arch/csky/kernel/dumpstack.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/csky/kernel/dumpstack.c b/arch/csky/kernel/dumpstack.c index a9a03ac57ec5..28d2deb0848d 100644 --- a/arch/csky/kernel/dumpstack.c +++ b/arch/csky/kernel/dumpstack.c @@ -47,7 +47,11 @@ void show_stack(struct task_struct *task, unsigned long *stack) if (task) stack = (unsigned long *)task->thread.esp0; else +#ifdef CONFIG_STACKTRACE + asm volatile("mov %0, r8\n":"=r"(stack)::"memory"); +#else stack = (unsigned long *)&stack; +#endif } endstack = (unsigned long *) (((unsigned long)stack + THREAD_SIZE - 1) & -THREAD_SIZE); -- 2.19.1
