Squashed 'third_party/elfutils/' content from commit 555e15e
Change-Id: I61cde98949e47e5c8c09c33260de17f30921be79
git-subtree-dir: third_party/elfutils
git-subtree-split: 555e15ebe8bf1eb33d00747173cfc80cc65648a4
diff --git a/libdw/dwarf_getlocation_die.c b/libdw/dwarf_getlocation_die.c
new file mode 100644
index 0000000..21b4365
--- /dev/null
+++ b/libdw/dwarf_getlocation_die.c
@@ -0,0 +1,77 @@
+/* Return DIE associated with a location expression op.
+ Copyright (C) 2013 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 <dwarf.h>
+#include <libdwP.h>
+
+int
+dwarf_getlocation_die (Dwarf_Attribute *attr, const Dwarf_Op *op,
+ Dwarf_Die *result)
+{
+ if (attr == NULL)
+ return -1;
+
+ Dwarf_Off dieoff;
+ switch (op->atom)
+ {
+ case DW_OP_GNU_implicit_pointer:
+ case DW_OP_call_ref:
+ case DW_OP_GNU_variable_value:
+ dieoff = op->number;
+ break;
+
+ case DW_OP_GNU_parameter_ref:
+ case DW_OP_GNU_convert:
+ case DW_OP_GNU_reinterpret:
+ case DW_OP_GNU_const_type:
+ case DW_OP_call2:
+ case DW_OP_call4:
+ dieoff = attr->cu->start + op->number;
+ break;
+
+ case DW_OP_GNU_regval_type:
+ case DW_OP_GNU_deref_type:
+ dieoff = attr->cu->start + op->number2;
+ break;
+
+ default:
+ __libdw_seterrno (DWARF_E_INVALID_ACCESS);
+ return -1;
+ }
+
+ if (__libdw_offdie (attr->cu->dbg, dieoff, result,
+ attr->cu->type_offset != 0) == NULL)
+ return -1;
+
+ return 0;
+}
+INTDEF(dwarf_getlocation_die);