mirror of
https://github.com/FEX-Emu/FEX.git
synced 2026-10-09 19:00:20 +02:00
Billy Laws
0e069f1e97
It is dangerous for FEX to rely on the system CRT as calls can have side effects that are also visible to the running application, and if patches are applied to any CRT exports used during compilation the call checker would trigger a reentry into the JIT to compile the patch and hence deadlock. Only functions that FEX actively uses are implemented, with the rest triggering an abort.
63 lines
1.9 KiB
C++
63 lines
1.9 KiB
C++
// SPDX-License-Identifier: MIT
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#include <iterator>
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#include <windef.h>
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#include <winternl.h>
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#include <wine/debug.h>
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#include "CRT.h"
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extern "C" {
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__attribute__((section(".CRT$FEXA"))) void (*FEXA)() = nullptr;
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__attribute__((section(".CRT$FEXZ"))) void (*FEXZ)() = nullptr;
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__attribute__((section(".CRT$XIA"))) void (*XIA)() = nullptr;
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__attribute__((section(".CRT$XIZ"))) void (*XIZ)() = nullptr;
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__attribute__((section(".CRT$XCA"))) void (*XCA)() = nullptr;
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__attribute__((section(".CRT$XCZ"))) void (*XCZ)() = nullptr;
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__attribute__((section(".CRT$XDA"))) void (*XDA)() = nullptr;
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__attribute__((section(".CRT$XDZ"))) void (*XDZ)() = nullptr;
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__attribute__((section(".CRT$XLA"))) void (*XLA)(HINSTANCE, DWORD, LPVOID*) = nullptr;
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__attribute__((section(".CRT$XZA"))) void (*XLZ)(HINSTANCE, DWORD, LPVOID*) = nullptr;
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uint64_t _tls_index;
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extern void (*__CTOR_LIST__[])();
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extern void (*__DTOR_LIST__[])();
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BOOL DllMainCRTStartup(HMODULE Handle, DWORD Reason, LPVOID Reserved) {
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LdrDisableThreadCalloutsForDll(Handle);
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return true;
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}
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}
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namespace {
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template<typename TFuncIt, typename... TArgs>
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void RunFuncArray(TFuncIt Begin, TFuncIt End, TArgs... Args) {
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for (auto It = Begin; It != End; It++) {
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if (*It) {
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(**It)(Args...);
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}
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}
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}
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} // namespace
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namespace FEX::Windows {
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void InitCRTProcess() {
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auto GNUCtorBegin = &__CTOR_LIST__[1];
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auto GNUCtorEnd = GNUCtorBegin;
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while (*GNUCtorEnd != nullptr) {
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GNUCtorEnd++;
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}
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RunFuncArray(&FEXA, &FEXZ);
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RunFuncArray(std::reverse_iterator(GNUCtorEnd), std::reverse_iterator(GNUCtorBegin));
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RunFuncArray(&XIA, &XIZ);
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RunFuncArray(&XCA, &XCZ);
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RunFuncArray(&XLA, &XLZ, nullptr, DLL_PROCESS_ATTACH, nullptr);
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}
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void InitCRTThread() {
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RunFuncArray(&XLA, &XLZ, nullptr, DLL_THREAD_ATTACH, nullptr);
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}
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void DeinitCRTThread() {
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RunFuncArray(&XLA, &XLZ, nullptr, DLL_THREAD_DETACH, nullptr);
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}
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} // namespace FEX::Windows
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