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/*
* Copyright (C) 2024 The LineageOS 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 <dlfcn.h>
#include <string.h>
extern "C" void* sensorsHalGetSubHal(uint32_t* version) {
static auto sensorsHalGetSubHalOrig = reinterpret_cast<typeof(sensorsHalGetSubHal)*>(
dlsym(dlopen("sensors.ssc.so", RTLD_NOW), "sensorsHalGetSubHal"));
static void* ret = nullptr;
if (ret == nullptr) {
// Call original function
ret = sensorsHalGetSubHalOrig(version);
// Get original VTable
auto vtableOrig = reinterpret_cast<void**>(ret);
// Reallocate VTable
static void* vtableNew[26];
memcpy(vtableNew, *vtableOrig, sizeof(vtableNew));
*vtableOrig = vtableNew;
// Modify VTable
vtableNew[23] = vtableNew[24]; // setCustomFlag -> getName
vtableNew[24] = vtableNew[25]; // getName -> initialize
vtableNew[25] = nullptr; // initialize -> nullptr
}
return ret;
}
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