Implement ifunc support for static executables.
A static executable is almost entirely statically relocated by the
linker, with the exception of IRELATIVE relocations, which must be
resolved by libc by enumerating the relocations using the special
linker-defined symbols __rela?_iplt_{start,end}. This patch implements
ifunc support by enumerating the relocations in this way.
Bug: 112482891
Test: /data/nativetest{,64}/bionic-unit-tests-static/bionic-unit-tests-static on walleye_hwasan-userdebug
Change-Id: Ia5522a190da0b86e095b141d5d4e68dd7dd4b695
diff --git a/tests/Android.bp b/tests/Android.bp
index 8ac0531..a409b2a 100644
--- a/tests/Android.bp
+++ b/tests/Android.bp
@@ -95,6 +95,7 @@
"grp_pwd_file_test.cpp",
"iconv_test.cpp",
"ifaddrs_test.cpp",
+ "ifunc_test.cpp",
"inttypes_test.cpp",
"iso646_test.c",
"langinfo_test.cpp",
diff --git a/tests/ifunc_test.cpp b/tests/ifunc_test.cpp
new file mode 100644
index 0000000..7ab5899
--- /dev/null
+++ b/tests/ifunc_test.cpp
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <gtest/gtest.h>
+
+int ret42() {
+ return 42;
+}
+
+extern "C" void* resolver() {
+ return (void*)ret42;
+}
+
+int ifunc() __attribute__((ifunc("resolver")));
+
+TEST(ifunc, function) {
+ ASSERT_EQ(42, ifunc());
+}