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Message-ID: <55BB8086.9080602@siemens.com> Date: Fri, 31 Jul 2015 16:04:54 +0200 From: Jan Kiszka <jan.kiszka@...mens.com> To: Steven Rostedt <rostedt@...dmis.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: [PATCH] trace-cmd: Leave out absolute addresses to fix bogus symbol resolutions On x86, page_fault_* tracepoints report userspace address via kernel symbols because all the per-cpu variable offsets are in kallsyms, occupying the lower address space. Fix this by skipping over absolute addresses while processing kallsyms. Signed-off-by: Jan Kiszka <jan.kiszka@...mens.com> --- trace-util.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/trace-util.c b/trace-util.c index 8a81dd0..da20e4c 100644 --- a/trace-util.c +++ b/trace-util.c @@ -434,8 +434,12 @@ void parse_proc_kallsyms(struct pevent *pevent, if (mod) mod[strlen(mod) - 1] = 0; - /* Hack for arm arch that adds a lot of bogus '$a' functions */ - if (func[0] != '$') + /* + * Hacks for + * - arm arch that adds a lot of bogus '$a' functions + * - x86-64 that reports per-cpu variable offsets as absolute + */ + if (func[0] != '$' && ch != 'A') pevent_register_function(pevent, func, addr, mod); free(func); free(mod); -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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