base: Expose the ObjectFile class to python.

This will make it possible to inspect a binary and determine, for
example, what architecture or operating system it was compiled for.

Change-Id: Ib40f1e1c02448dc5bf084bb0dd98d3767f463fef
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33899
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

src/python/pybind11/object_file.cc

@@ -0,0 +1,57 @@
+/*
+ * Copyright 2020 Google, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "base/loader/object_file.hh"
+#include "python/pybind11/pybind.hh"
+#include "sim/init.hh"
+
+namespace py = pybind11;
+
+namespace
+{
+
+void
+objectfile_pybind(py::module &m_internal)
+{
+    py::module m = m_internal.def_submodule("object_file");
+
+    py::class_<Loader::ObjectFile>(m, "ObjectFile")
+        .def("get_arch", [](const Loader::ObjectFile &obj) {
+                return Loader::archToString(obj.getArch());
+                }, py::return_value_policy::reference)
+        .def("get_op_sys", [](const Loader::ObjectFile &obj) {
+                return Loader::opSysToString(obj.getOpSys());
+                }, py::return_value_policy::reference)
+        .def("entry_point", &Loader::ObjectFile::entryPoint)
+        .def("get_interpreter", &Loader::ObjectFile::getInterpreter);
+
+    m.def("create", [](const std::string &fname) {
+            return Loader::createObjectFile(fname); });
+}
+EmbeddedPyBind embed_("object_file", &objectfile_pybind);
+
+} // anonymous namespace