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

Change-Id: I61cde98949e47e5c8c09c33260de17f30921be79
git-subtree-dir: third_party/elfutils
git-subtree-split: 555e15ebe8bf1eb33d00747173cfc80cc65648a4
diff --git a/tests/rdwrmmap.c b/tests/rdwrmmap.c
new file mode 100644
index 0000000..6f027df
--- /dev/null
+++ b/tests/rdwrmmap.c
@@ -0,0 +1,49 @@
+/* Copyright (C) 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 the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   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 a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <errno.h>
+#include <error.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <libelf.h>
+
+int
+main (int argc __attribute__ ((unused)), char *argv[])
+{
+  int fd = open (argv[1], O_RDWR);
+  if (fd < 0)
+    error (2, errno, "open: %s", argv[1]);
+
+  if (elf_version (EV_CURRENT) == EV_NONE)
+    error (1, 0, "libelf version mismatch");
+
+  Elf *elf = elf_begin (fd, ELF_C_RDWR_MMAP, NULL);
+  if (elf == NULL)
+    error (1, 0, "elf_begin: %s", elf_errmsg (-1));
+
+  if (elf_update (elf, ELF_C_WRITE) < 0)
+    error (1, 0, "elf_update: %s", elf_errmsg (-1));
+
+  elf_end (elf);
+  close (fd);
+
+  return 0;
+}