Commit bb28cec4 authored Aug 27, 2014 by Behan Webster Committed by Will Deacon Sep 08, 2014

arm64: LLVMLinux: Use current_stack_pointer in save_stack_trace_tsk



Use the global current_stack_pointer to get the value of the stack pointer.
This change supports being able to compile the kernel with both gcc and clang.

Signed-off-by: Behan Webster <behanw@converseincode.com>
Signed-off-by: Mark Charlebois <charlebm@gmail.com>
Reviewed-by: Jan-Simon Möller <dl9pf@gmx.de>
Reviewed-by: Olof Johansson <olof@lixom.net>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

parent 3337a10e

arch/arm64/kernel/stacktrace.c

+1 −2

Original line number	Diff line number	Diff line
		@@ -111,10 +111,9 @@ void save_stack_trace_tsk(struct task_struct tsk, struct stack_trace trace)
		frame.sp = thread_saved_sp(tsk);
		frame.pc = thread_saved_pc(tsk);
		} else {
		register unsigned long current_sp asm("sp");
		data.no_sched_functions = 0;
		frame.fp = (unsigned long)__builtin_frame_address(0);
		frame.sp = current_sp;
		frame.sp = current_stack_pointer;
		frame.pc = (unsigned long)save_stack_trace_tsk;
		}