forked from OSchip/llvm-project
67 lines
2.3 KiB
C++
67 lines
2.3 KiB
C++
//===- lib/ReaderWriter/PECOFF/InferSubsystemPass.h ----------------------===//
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//
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// The LLVM Linker
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLD_READER_WRITER_PE_COFF_INFER_SUBSYSTEM_PASS_H
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#define LLD_READER_WRITER_PE_COFF_INFER_SUBSYSTEM_PASS_H
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#include "Atoms.h"
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#include "lld/Core/Pass.h"
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#include <vector>
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namespace lld {
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namespace pecoff {
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// Infers subsystem from entry point function name.
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class InferSubsystemPass : public lld::Pass {
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public:
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InferSubsystemPass(PECOFFLinkingContext &ctx) : _ctx(ctx) {}
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void perform(std::unique_ptr<MutableFile> &file) override {
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if (_ctx.getSubsystem() != WindowsSubsystem::IMAGE_SUBSYSTEM_UNKNOWN)
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return;
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if (_ctx.isDll()) {
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_ctx.setSubsystem(WindowsSubsystem::IMAGE_SUBSYSTEM_WINDOWS_GUI);
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return;
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}
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// Scan the resolved symbols to infer the subsystem.
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const std::string wWinMain = _ctx.decorateSymbol("wWinMainCRTStartup");
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const std::string wWinMainAt = _ctx.decorateSymbol("wWinMainCRTStartup@");
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const std::string winMain = _ctx.decorateSymbol("WinMainCRTStartup");
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const std::string winMainAt = _ctx.decorateSymbol("WinMainCRTStartup@");
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const std::string wmain = _ctx.decorateSymbol("wmainCRTStartup");
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const std::string wmainAt = _ctx.decorateSymbol("wmainCRTStartup@");
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const std::string main = _ctx.decorateSymbol("mainCRTStartup");
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const std::string mainAt = _ctx.decorateSymbol("mainCRTStartup@");
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for (const DefinedAtom *atom : file->definedAtoms()) {
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if (atom->name() == wWinMain || atom->name().startswith(wWinMainAt) ||
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atom->name() == winMain || atom->name().startswith(winMainAt)) {
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_ctx.setSubsystem(WindowsSubsystem::IMAGE_SUBSYSTEM_WINDOWS_GUI);
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return;
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}
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if (atom->name() == wmain || atom->name().startswith(wmainAt) ||
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atom->name() == main || atom->name().startswith(mainAt)) {
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_ctx.setSubsystem(WindowsSubsystem::IMAGE_SUBSYSTEM_WINDOWS_CUI);
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return;
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}
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}
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llvm::report_fatal_error("Failed to infer subsystem");
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}
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private:
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PECOFFLinkingContext &_ctx;
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};
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} // namespace pecoff
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} // namespace lld
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#endif
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