1 files changed, 64 insertions, 0 deletions

diff --git a/tools/perf/arch/arm64/annotate/instructions.c b/tools/perf/arch/arm64/annotate/instructions.c
new file mode 100644
index 000000000..6688977e4
--- /dev/null
+++ b/tools/perf/arch/arm64/annotate/instructions.c
@@ -0,0 +1,64 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/compiler.h>
+#include <sys/types.h>
+#include <regex.h>
+
+struct arm64_annotate {
+	regex_t call_insn,
+		jump_insn;
+};
+
+static struct ins_ops *arm64__associate_instruction_ops(struct arch *arch, const char *name)
+{
+	struct arm64_annotate *arm = arch->priv;
+	struct ins_ops *ops;
+	regmatch_t match[2];
+
+	if (!regexec(&arm->jump_insn, name, 2, match, 0))
+		ops = &jump_ops;
+	else if (!regexec(&arm->call_insn, name, 2, match, 0))
+		ops = &call_ops;
+	else if (!strcmp(name, "ret"))
+		ops = &ret_ops;
+	else
+		return NULL;
+
+	arch__associate_ins_ops(arch, name, ops);
+	return ops;
+}
+
+static int arm64__annotate_init(struct arch *arch, char *cpuid __maybe_unused)
+{
+	struct arm64_annotate *arm;
+	int err;
+
+	if (arch->initialized)
+		return 0;
+
+	arm = zalloc(sizeof(*arm));
+	if (!arm)
+		return -1;
+
+	/* bl, blr */
+	err = regcomp(&arm->call_insn, "^blr?$", REG_EXTENDED);
+	if (err)
+		goto out_free_arm;
+	/* b, b.cond, br, cbz/cbnz, tbz/tbnz */
+	err = regcomp(&arm->jump_insn, "^[ct]?br?\\.?(cc|cs|eq|ge|gt|hi|le|ls|lt|mi|ne|pl)?n?z?$",
+		      REG_EXTENDED);
+	if (err)
+		goto out_free_call;
+
+	arch->initialized = true;
+	arch->priv	  = arm;
+	arch->associate_instruction_ops   = arm64__associate_instruction_ops;
+	arch->objdump.comment_char	  = '/';
+	arch->objdump.skip_functions_char = '+';
+	return 0;
+
+out_free_call:
+	regfree(&arm->call_insn);
+out_free_arm:
+	free(arm);
+	return -1;
+}