Squashed 'third_party/elfutils/' content from commit 555e15e

Change-Id: I61cde98949e47e5c8c09c33260de17f30921be79
git-subtree-dir: third_party/elfutils
git-subtree-split: 555e15ebe8bf1eb33d00747173cfc80cc65648a4
diff --git a/libdwfl/lines.c b/libdwfl/lines.c
new file mode 100644
index 0000000..128c0c9
--- /dev/null
+++ b/libdwfl/lines.c
@@ -0,0 +1,56 @@
+/* Fetch source line info for CU.
+   Copyright (C) 2005, 2006 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 "libdwflP.h"
+#include "../libdw/libdwP.h"
+
+Dwfl_Error
+internal_function
+__libdwfl_cu_getsrclines (struct dwfl_cu *cu)
+{
+  if (cu->lines == NULL)
+    {
+      Dwarf_Lines *lines;
+      size_t nlines;
+      if (INTUSE(dwarf_getsrclines) (&cu->die, &lines, &nlines) != 0)
+	return DWFL_E_LIBDW;
+
+      cu->lines = malloc (offsetof (struct Dwfl_Lines, idx[nlines]));
+      if (cu->lines == NULL)
+	return DWFL_E_NOMEM;
+      cu->lines->cu = cu;
+      for (unsigned int i = 0; i < nlines; ++i)
+	cu->lines->idx[i].idx = i;
+    }
+
+  return DWFL_E_NOERROR;
+}