Squashed 'third_party/elfutils/' content from commit 555e15e
Change-Id: I61cde98949e47e5c8c09c33260de17f30921be79
git-subtree-dir: third_party/elfutils
git-subtree-split: 555e15ebe8bf1eb33d00747173cfc80cc65648a4
diff --git a/libelf/elf_rand.c b/libelf/elf_rand.c
new file mode 100644
index 0000000..f1850e7
--- /dev/null
+++ b/libelf/elf_rand.c
@@ -0,0 +1,63 @@
+/* Select specific element in archive.
+ Copyright (C) 1998, 1999, 2000, 2002, 2015 Red Hat, Inc.
+ This file is part of elfutils.
+ Contributed by Ulrich Drepper <drepper@redhat.com>, 1998.
+
+ 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 <libelf.h>
+#include <stddef.h>
+
+#include "libelfP.h"
+
+
+size_t
+elf_rand (Elf *elf, size_t offset)
+{
+ /* Be gratious, the specs demand it. */
+ if (elf == NULL || elf->kind != ELF_K_AR)
+ return 0;
+
+ rwlock_wrlock (elf->lock);
+
+ /* Save the old offset and set the offset. */
+ elf->state.ar.offset = elf->start_offset + offset;
+
+ /* Get the next archive header. */
+ if (__libelf_next_arhdr_wrlock (elf) != 0)
+ {
+ /* Mark the archive header as unusable. */
+ elf->state.ar.elf_ar_hdr.ar_name = NULL;
+ return 0;
+ }
+
+ rwlock_unlock (elf->lock);
+
+ return offset;
+}