[PATCH 2/2] perf/s390: implement jump types for perf annotate

Christian Borntraeger
2017-04-06T07:51:52Z

Implement simple detection for all kind of jumps and branches.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
---
tools/perf/arch/s390/annotate/instructions.c | 30 ++++++++++++++++++++++++++++
tools/perf/util/annotate.c | 2 ++
2 files changed, 32 insertions(+)
create mode 100644 tools/perf/arch/s390/annotate/instructions.c

diff --git a/tools/perf/arch/s390/annotate/instructions.c b/tools/perf/arch/s390/annotate/instructions.c
new file mode 100644
index 0000000..745b4b1
--- /dev/null
+++ b/tools/perf/arch/s390/annotate/instructions.c
@@ -0,0 +1,30 @@
+static struct ins_ops *s390__associate_ins_ops(struct arch *arch, const char *name)
+{
+ struct ins_ops *ops = NULL;
+
+ /* catch all kind of jumps */
+ if (strchr(name, 'j') ||
+ !strncmp(name, "bct", 3) ||
+ !strncmp(name, "br", 2))
+ ops = &jump_ops;
+ /* override call/returns */
+ if (!strcmp(name, "bras") ||
+ !strcmp(name, "brasl") ||
+ !strcmp(name, "basr"))
+ ops = &call_ops;
+ if (!strcmp(name, "br"))
+ ops = &ret_ops;
+
+ arch__associate_ins_ops(arch, name, ops);
+ return ops;
+}
+
+static int s390__annotate_init(struct arch *arch)
+{
+ if (!arch->initialized) {
+ arch->initialized = true;
+ arch->associate_instruction_ops = s390__associate_ins_ops;
+ }
+
+ return 0;
+}
diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 7aa5722..2cc02f6 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -108,6 +108,7 @@ static int arch__associate_ins_ops(struct arch* arch, const char *name, struct i
#include "arch/arm64/annotate/instructions.c"
#include "arch/x86/annotate/instructions.c"
#include "arch/powerpc/annotate/instructions.c"
+#include "arch/s390/annotate/instructions.c"

static struct arch architectures[] = {
{
@@ -132,6 +133,7 @@ static struct arch architectures[] = {
},
{
.name = "s390",
+ .init = s390__annotate_init,
.objdump = {
.comment_char = '#',
},
--
2.7.4