csky: Fixup dead loop in show_stack



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 <ren_guo@c-sky.com>
Reported-by: Lu Baoquan <lu.baoquan@intellif.com>

parent 76d21d18

arch/csky/kernel/dumpstack.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -38,7 +38,11 @@ void show_stack(struct task_struct task, unsigned long stack)
		if (task)
		stack = (unsigned long *)thread_saved_fp(task);
		else
		#ifdef CONFIG_STACKTRACE
		asm volatile("mov %0, r8\n":"=r"(stack)::"memory");
		#else
		stack = (unsigned long *)&stack;
		#endif
		}

		show_trace(stack);