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| author | Denys Vlasenko <dvlasenk@redhat.com> | 2015-04-10 15:06:57 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-04-11 13:08:53 +0200 |
| commit | 5df71b396b2d1fdd9d9f5a33e2eda5dc27c5632d (patch) | |
| tree | ef5f48fd8d5d65ca156c92017de1aa7b1f7bf70a /arch/x86/kernel/perf_regs.c | |
| parent | perf/x86/64: Do not guess user_regs->cs, ss, sp in get_regs_user() (diff) | |
| download | linux-5df71b396b2d1fdd9d9f5a33e2eda5dc27c5632d.tar.xz linux-5df71b396b2d1fdd9d9f5a33e2eda5dc27c5632d.zip | |
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>
Diffstat (limited to 'arch/x86/kernel/perf_regs.c')
| -rw-r--r-- | arch/x86/kernel/perf_regs.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/x86/kernel/perf_regs.c b/arch/x86/kernel/perf_regs.c index 7ab198acc5b8..a8d4e4862ace 100644 --- a/arch/x86/kernel/perf_regs.c +++ b/arch/x86/kernel/perf_regs.c @@ -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) ? |