Commit 9e46294d authored Jul 02, 2011 by Frederic Weisbecker

x86: Save stack pointer in perf live regs savings

In order to prepare for fetching the stack pointer from the
regs when possible in dump_trace() instead of taking the
local one, save the current stack pointer in perf live regs saving.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>

parent af07ce3e

arch/x86/include/asm/perf_event.h

+5 −0

Original line number	Diff line number	Diff line
		@@ -152,6 +152,11 @@ extern unsigned long perf_misc_flags(struct pt_regs *regs);
		(regs)->bp = caller_frame_pointer(); \
		(regs)->cs = __KERNEL_CS; \
		regs->flags = 0; \
		asm volatile( \
		_ASM_MOV "%%"_ASM_SP ", %0\n" \
		: "=m" ((regs)->sp) \
		:: "memory" \
		); \
		}

		#else