perf annotate: Resolve symbols using objdump comment for single op ins

Starting with inc, incl, dec, decl.

Requested-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-jvh0jspefr5jyn0l7qko12st@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 45 insertions, 0 deletions

diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 82c7f630f8a8..a6109dc3a81e 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -205,6 +205,47 @@ static struct ins_ops mov_ops = {
         .scnprintf = mov__scnprintf,
 };
 
+static int dec__parse(struct ins_operands *ops)
+{
+        char *target, *comment, *s, prev;
+
+        target = s = ops->raw;
+
+        while (s[0] != '\0' && !isspace(s[0]))
+                ++s;
+        prev = *s;
+        *s = '\0';
+
+        ops->target.raw = strdup(target);
+        *s = prev;
+
+        if (ops->target.raw == NULL)
+                return -1;
+
+        comment = strchr(s, '#');
+        if (comment == NULL)
+                return 0;
+
+        while (comment[0] != '\0' && isspace(comment[0]))
+                ++comment;
+
+        comment__symbol(ops->target.raw, comment, &ops->target.addr, &ops->target.name);
+
+        return 0;
+}
+
+static int dec__scnprintf(struct ins *ins, char *bf, size_t size,
+                           struct ins_operands *ops)
+{
+        return scnprintf(bf, size, "%-6.6s %s", ins->name,
+                         ops->target.name ?: ops->target.raw);
+}
+
+static struct ins_ops dec_ops = {
+        .parse     = dec__parse,
+        .scnprintf = dec__scnprintf,
+};
+
 static int nop__scnprintf(struct ins *ins __used, char *bf, size_t size,
                           struct ins_operands *ops __used)
 {
@@ -232,7 +273,11 @@ static struct ins instructions[] = {
         { .name = "cmpq",  .ops  = &mov_ops, },
         { .name = "cmpw",  .ops  = &mov_ops, },
         { .name = "cmpxch", .ops  = &mov_ops, },
+        { .name = "dec",   .ops  = &dec_ops, },
+        { .name = "decl",  .ops  = &dec_ops, },
         { .name = "imul",  .ops  = &mov_ops, },
+        { .name = "inc",   .ops  = &dec_ops, },
+        { .name = "incl",  .ops  = &dec_ops, },
         { .name = "ja",    .ops  = &jump_ops, },
         { .name = "jae",   .ops  = &jump_ops, },
         { .name = "jb",    .ops  = &jump_ops, },