[PATCH] trace-cmd: Leave out absolute addresses to fix bogus symbol resolutions

[Jan Kiszka <jan.kiszka@siemens.com>]

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@siemens.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