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/*
* 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>
#include <sys/auxv.h>
#if defined(__BIONIC__)
#include <sys/ifunc.h>
#endif
typedef int (*fn_ptr_t)();
int ret42() {
return 42;
}
extern "C" fn_ptr_t resolver() {
return ret42;
}
int ifunc() __attribute__((ifunc("resolver")));
TEST(ifunc, function) {
ASSERT_EQ(42, ifunc());
}
#if defined(__BIONIC__)
#if defined(__aarch64__)
static uint64_t g_hwcap;
static __ifunc_arg_t g_arg;
extern "C" fn_ptr_t hwcap_resolver(uint64_t hwcap, __ifunc_arg_t* arg) {
g_hwcap = hwcap;
g_arg = *arg;
return ret42;
}
#elif defined(__arm__)
static unsigned long g_hwcap;
extern "C" fn_ptr_t hwcap_resolver(unsigned long hwcap) {
g_hwcap = hwcap;
return ret42;
}
#else
extern "C" fn_ptr_t hwcap_resolver() {
return ret42;
}
#endif
int hwcap() __attribute__((ifunc("hwcap_resolver")));
TEST(ifunc, hwcap) {
ASSERT_EQ(42, hwcap());
#if defined(__aarch64__)
EXPECT_EQ(getauxval(AT_HWCAP) | _IFUNC_ARG_HWCAP, g_hwcap);
EXPECT_EQ(sizeof(__ifunc_arg_t), g_arg._size);
EXPECT_EQ(getauxval(AT_HWCAP), g_arg._hwcap);
EXPECT_EQ(getauxval(AT_HWCAP2), g_arg._hwcap2);
#elif defined(__arm__)
EXPECT_EQ(getauxval(AT_HWCAP), g_hwcap);
#endif
}
#endif // defined(__BIONIC__)
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