[LIB]: Support DW_AT_MIPS_linkage_name

Another C++ specific case:

-       class TypeTemplate ByName(const string  &, size_t);
+       class TypeTemplate ByName(const string  &, size_t); /* linkage=_ZN4ROOT6Reflex12TypeTemplate6ByNameERKSsj */

Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>

dwarves.c

@@ -1688,6 +1688,7 @@ static struct function *function__new(Dwarf_Die *die)
 		ftype__init(&self->proto, die);
 		lexblock__init(&self->lexblock, die);
 		self->name     = strings__add(attr_string(die, DW_AT_name));
+		self->linkage_name = strings__add(attr_string(die, DW_AT_MIPS_linkage_name));
 		self->inlined  = attr_numeric(die, DW_AT_inline);
 		self->external = dwarf_hasattr(die, DW_AT_external);
 		self->abstract_origin = attr_type(die, DW_AT_abstract_origin);
@@ -2598,6 +2599,14 @@ size_t tag__fprintf(struct tag *self, const struct cu *cu,
 		++printed;
 	}
 
+	if (self->tag == DW_TAG_subprogram &&
+	    !pconf->suppress_comments) {
+		const struct function *fself = tag__function(self);
+
+		if (fself->linkage_name != NULL)
+			printed += fprintf(fp, " /* linkage=%s */", fself->linkage_name);
+	}
+
 	if (pconf->expand_types)
 		--self->recursivity_level;
 

dwarves.h

@@ -316,6 +316,7 @@ struct function {
 	struct ftype	 proto;
 	struct lexblock	 lexblock;
 	const char	 *name;
+	char		 *linkage_name;
 	Dwarf_Off	 abstract_origin;
 	Dwarf_Off	 specification;
 	size_t		 cu_total_size_inline_expansions;