1 files changed, 79 insertions, 0 deletions
diff --git a/libdw/dwarf_getlocation_implicit_pointer.c b/libdw/dwarf_getlocation_implicit_pointer.c
new file mode 100644
index 00000000..f1c16be7
--- /dev/null
+++ b/libdw/dwarf_getlocation_implicit_pointer.c
@@ -0,0 +1,79 @@
+/* Return associated attribute for DW_OP_GNU_implicit_pointer.
+   Copyright (C) 2010 Red Hat, Inc.
+   This file is part of elfutils.
+
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
+
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "libdwP.h"
+#include <dwarf.h>
+
+
+static unsigned char empty_exprloc = 0;
+static Dwarf_CU empty_cu = { .startp = &empty_exprloc,
+			     .endp = &empty_exprloc + 1 };
+
+void
+internal_function
+__libdw_empty_loc_attr (Dwarf_Attribute *attr)
+{
+  attr->code = DW_AT_location;
+  attr->form = DW_FORM_exprloc;
+  attr->valp = &empty_exprloc;
+  attr->cu = &empty_cu;
+}
+
+int
+dwarf_getlocation_implicit_pointer (attr, op, result)
+     Dwarf_Attribute *attr;
+     const Dwarf_Op *op;
+     Dwarf_Attribute *result;
+{
+  if (attr == NULL)
+    return -1;
+
+  if (unlikely (op->atom != DW_OP_GNU_implicit_pointer))
+    {
+      __libdw_seterrno (DWARF_E_INVALID_ACCESS);
+      return -1;
+    }
+
+  Dwarf_Die die;
+  if (__libdw_offdie (attr->cu->dbg, op->number, &die,
+		      attr->cu->type_offset != 0) == NULL)
+    return -1;
+
+  if (INTUSE(dwarf_attr) (&die, DW_AT_location, result) == NULL
+      && INTUSE(dwarf_attr) (&die, DW_AT_const_value, result) == NULL)
+    {
+      __libdw_empty_loc_attr (result);
+      return 0;
+    }
+
+  return 0;
+}