perf machine: Set up ref_reloc_sym in machine__create_kernel_maps()

[~andy/linux] / tools / perf / util / machine.c

diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 290c2e6d4001643feecfcfc6e0517018c8bd0112..c872991e0f655ba581443f0f413d81a5b910842f 100644 (file)
--- 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;
 }