perf tools: Adjust kallsyms for relocated kernel
authorAdrian Hunter <adrian.hunter@intel.com>
Wed, 29 Jan 2014 14:14:43 +0000 (16:14 +0200)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Fri, 31 Jan 2014 20:21:53 +0000 (17:21 -0300)
commitd9b62aba87a82939c73f451a166c7a21342350d6
tree4479717f670a11e9ff96bc15a12ac618a74d3314
parentc080f72753def150993144d755379941f8b14683
perf tools: Adjust kallsyms for relocated kernel

If the kernel is relocated at boot time, kallsyms will not match data
recorded previously.

That does not matter for modules because they are corrected anyway.  It
also does not matter if vmlinux is being used for symbols. But if perf
tools has only kallsyms then the symbols will not match.

Fix by applying the delta gained by comparing the old and current
addresses of the relocation reference symbol.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Jiri Olsa <jolsa@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1391004884-10334-9-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools/perf/util/symbol.c