Make the HWCAP/HWCAP2 constants available from <sys/auxv.h>.
Noticed by ARM when adding BTI support to the linker.
Test: treehugger
Change-Id: If3b87d0bd4682ff478b7805251fc9a88a7f439f9
diff --git a/tests/sys_auxv_test.cpp b/tests/sys_auxv_test.cpp
new file mode 100644
index 0000000..afd62ea
--- /dev/null
+++ b/tests/sys_auxv_test.cpp
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * 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 <gtest/gtest.h>
+
+#include <sys/auxv.h>
+
+TEST(sys_auxv, getauxval_HWCAP) {
+ __attribute__((__unused__)) unsigned long hwcap = getauxval(AT_HWCAP);
+
+ // Check that the constants for *using* AT_HWCAP are also available.
+#if defined(__arm__)
+ ASSERT_NE(0, HWCAP_THUMB);
+#elif defined(__aarch64__)
+ ASSERT_NE(0, HWCAP_FP);
+#endif
+}
+
+TEST(sys_auxv, getauxval_HWCAP2) {
+#if defined(AT_HWCAP2)
+ __attribute__((__unused__)) unsigned long hwcap = getauxval(AT_HWCAP2);
+
+ // Check that the constants for *using* AT_HWCAP2 are also available.
+#if defined(__arm__)
+ ASSERT_NE(0, HWCAP2_AES);
+#elif defined(__aarch64__)
+ ASSERT_NE(0, HWCAP2_SVE2);
+#endif
+#else
+ GTEST_SKIP() << "No AT_HWCAP2 for this architecture.";
+#endif
+}