Commit 5df71b39 authored Apr 10, 2015 by Denys Vlasenko Committed by Ingo Molnar Apr 11, 2015

perf/x86/64: Do report user_regs->cx while we are in syscall, in get_regs_user()



Yes, it is true that cx contains return address.
It's not clear why we trash it.
Stop doing that.

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1428671219-29341-2-git-send-email-dvlasenk@redhat.com


Signed-off-by: Ingo Molnar <mingo@kernel.org>

parent aa21df04

arch/x86/kernel/perf_regs.c

+0 −2

Original line number	Diff line number	Diff line
		@@ -177,8 +177,6 @@ void perf_get_regs_user(struct perf_regs *regs_user,
		* than just blindly copying user_regs.
		*/
		regs_user->abi = PERF_SAMPLE_REGS_ABI_64;
		/* usually contains return address (same as ->ip) */
		regs_user_copy->cx = -1;
		} else {
		/* We're probably in an interrupt or exception. */
		regs_user->abi = user_64bit_mode(user_regs) ?