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authorAdrian Hunter <adrian.hunter@intel.com>2014-01-29 18:14:39 +0400
committerArnaldo Carvalho de Melo <acme@redhat.com>2014-02-01 00:21:49 +0400
commit5512cf24bed2de56f1ef44b6cc9a0a9b15499cea (patch)
treeef23b3c63d972c725ae90ba6c954c43b9b335362 /tools
parent15a0a8706c32bd38bff9ebf7c6ef24f32d1ea921 (diff)
downloadlinux-5512cf24bed2de56f1ef44b6cc9a0a9b15499cea.tar.xz
perf machine: Set up ref_reloc_sym in machine__create_kernel_maps()
The ref_reloc_sym is always needed for the kernel map in order to check for relocation. Consequently set it up when the kernel map is created. Otherwise it was only being set up by 'perf record'. 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/1391004884-10334-5-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/util/machine.c23
-rw-r--r--tools/perf/util/machine.h2
2 files changed, 25 insertions, 0 deletions
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 290c2e6d4001..c872991e0f65 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -832,9 +832,25 @@ static int machine__create_modules(struct machine *machine)
return 0;
}
+const char *ref_reloc_sym_names[] = {"_text", "_stext", NULL};
+
int machine__create_kernel_maps(struct machine *machine)
{
struct dso *kernel = machine__get_kernel(machine);
+ char filename[PATH_MAX];
+ const char *name;
+ u64 addr = 0;
+ int i;
+
+ machine__get_kallsyms_filename(machine, filename, PATH_MAX);
+
+ for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) {
+ addr = kallsyms__get_function_start(filename, name);
+ if (addr)
+ break;
+ }
+ if (!addr)
+ return -1;
if (kernel == NULL ||
__machine__create_kernel_maps(machine, kernel) < 0)
@@ -853,6 +869,13 @@ int machine__create_kernel_maps(struct machine *machine)
* Now that we have all the maps created, just set the ->end of them:
*/
map_groups__fixup_end(&machine->kmaps);
+
+ if (maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, name,
+ addr)) {
+ machine__destroy_kernel_maps(machine);
+ return -1;
+ }
+
return 0;
}
diff --git a/tools/perf/util/machine.h b/tools/perf/util/machine.h
index 477133015440..f77e91e483dc 100644
--- a/tools/perf/util/machine.h
+++ b/tools/perf/util/machine.h
@@ -18,6 +18,8 @@ union perf_event;
#define HOST_KERNEL_ID (-1)
#define DEFAULT_GUEST_KERNEL_ID (0)
+extern const char *ref_reloc_sym_names[];
+
struct machine {
struct rb_node rb_node;
pid_t pid;