1 files changed, 56 insertions, 4 deletions

diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index d102716c43a1..bfc5a27597d6 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -110,10 +110,10 @@ static int jump__parse(struct ins_operands *ops)
 {
         const char *s = strchr(ops->raw, '+');
 
-        ops->target.addr = strtoll(ops->raw, NULL, 16);
+        ops->target.addr = strtoull(ops->raw, NULL, 16);
 
         if (s++ != NULL)
-                ops->target.offset = strtoll(s, NULL, 16);
+                ops->target.offset = strtoull(s, NULL, 16);
         else
                 ops->target.offset = UINT64_MAX;
 
@@ -821,11 +821,55 @@ static int symbol__parse_objdump_line(struct symbol *sym, struct map *map,
         if (dl == NULL)
                 return -1;
 
+        if (dl->ops.target.offset == UINT64_MAX)
+                dl->ops.target.offset = dl->ops.target.addr -
+                                        map__rip_2objdump(map, sym->start);
+
+        /*
+         * kcore has no symbols, so add the call target name if it is on the
+         * same map.
+         */
+        if (dl->ins && ins__is_call(dl->ins) && !dl->ops.target.name) {
+                struct symbol *s;
+                u64 ip = dl->ops.target.addr;
+
+                if (ip >= map->start && ip <= map->end) {
+                        ip = map->map_ip(map, ip);
+                        s = map__find_symbol(map, ip, NULL);
+                        if (s && s->start == ip)
+                                dl->ops.target.name = strdup(s->name);
+                }
+        }
+
         disasm__add(&notes->src->source, dl);
 
         return 0;
 }
 
+static void delete_last_nop(struct symbol *sym)
+{
+        struct annotation *notes = symbol__annotation(sym);
+        struct list_head *list = &notes->src->source;
+        struct disasm_line *dl;
+
+        while (!list_empty(list)) {
+                dl = list_entry(list->prev, struct disasm_line, node);
+
+                if (dl->ins && dl->ins->ops) {
+                        if (dl->ins->ops != &nop_ops)
+                                return;
+                } else {
+                        if (!strstr(dl->line, " nop ") &&
+                            !strstr(dl->line, " nopl ") &&
+                            !strstr(dl->line, " nopw "))
+                                return;
+                }
+
+                list_del(&dl->node);
+                disasm_line__free(dl);
+        }
+}
+
 int symbol__annotate(struct symbol *sym, struct map *map, size_t privsize)
 {
         struct dso *dso = map->dso;
@@ -864,7 +908,8 @@ fallback:
                 free_filename = false;
         }
 
-        if (dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS) {
+        if (dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS &&
+            !dso__is_kcore(dso)) {
                 char bf[BUILD_ID_SIZE * 2 + 16] = " with build id ";
                 char *build_id_msg = NULL;
 
@@ -898,7 +943,7 @@ fallback:
         snprintf(command, sizeof(command),
                  "%s %s%s --start-address=0x%016" PRIx64
                  " --stop-address=0x%016" PRIx64
-                 " -d %s %s -C %s|grep -v %s|expand",
+                 " -d %s %s -C %s 2>/dev/null|grep -v %s|expand",
                  objdump_path ? objdump_path : "objdump",
                  disassembler_style ? "-M " : "",
                  disassembler_style ? disassembler_style : "",
@@ -918,6 +963,13 @@ fallback:
                 if (symbol__parse_objdump_line(sym, map, file, privsize) < 0)
                         break;
 
+        /*
+         * kallsyms does not have symbol sizes so there may a nop at the end.
+         * Remove it.
+         */
+        if (dso__is_kcore(dso))
+                delete_last_nop(sym);
+
         pclose(file);
 out_free_filename:
         if (free_filename)