perf annotate: Allow arches to have a init routine and a priv area

Arches like ARM will want to use regular expressions when deciding what
instructions to associate with what ins_ops, provide infrastructure for
that.

Reviewed-by: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Chris Riyder <chris.ryder@arm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kim Phillips <kim.phillips@arm.com>
Cc: Markus Trippelsdorf <markus@trippelsdorf.de>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Taeung Song <treeze.taeung@gmail.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-7dmnk9el2ipu3nxog092k9z5@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/annotate.c

@@ -39,6 +39,9 @@ struct arch {
 	size_t		nr_instructions_allocated;
 	struct ins_ops  *(*associate_instruction_ops)(struct arch *arch, const char *name);
 	bool		sorted_instructions;
+	bool		initialized;
+	void		*priv;
+	int		(*init)(struct arch *arch);
 	struct		{
 		char comment_char;
 		char skip_functions_char;
@@ -1356,6 +1359,14 @@ int symbol__disassemble(struct symbol *sym, struct map *map, const char *arch_na
 	if (arch == NULL)
 		return -ENOTSUP;
 
+	if (arch->init) {
+		err = arch->init(arch);
+		if (err) {
+			pr_err("%s: failed to initialize %s arch priv area\n", __func__, arch->name);
+			return err;
+		}
+	}
+
 	pr_debug("%s: filename=%s, sym=%s, start=%#" PRIx64 ", end=%#" PRIx64 "\n", __func__,
 		 symfs_filename, sym->name, map->unmap_ip(map, sym->start),
 		 map->unmap_ip(map, sym->end));