| 1 | //===- MinGW.h --------------------------------------------------*- C++ -*-===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #ifndef LLD_COFF_MINGW_H |
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| 10 | #define LLD_COFF_MINGW_H |
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| 11 | |
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| 12 | #include "Config.h" |
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| 13 | #include "Symbols.h" |
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| 14 | #include "lld/Common/LLVM.h" |
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| 15 | #include "llvm/ADT/ArrayRef.h" |
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| 16 | #include "llvm/ADT/DenseSet.h" |
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| 17 | #include "llvm/ADT/StringSet.h" |
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| 18 | #include "llvm/Option/ArgList.h" |
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| 19 | #include <vector> |
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| 20 | |
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| 21 | namespace lld::coff { |
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| 22 | class COFFLinkerContext; |
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| 23 | |
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| 24 | // Logic for deciding what symbols to export, when exporting all |
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| 25 | // symbols for MinGW. |
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| 26 | class AutoExporter { |
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| 27 | public: |
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| 28 | AutoExporter(COFFLinkerContext &ctx, |
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| 29 | const llvm::DenseSet<StringRef> &manualExcludeSymbols); |
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| 30 | |
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| 31 | void addWholeArchive(StringRef path); |
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| 32 | void addExcludedSymbol(StringRef symbol); |
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| 33 | |
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| 34 | llvm::StringSet<> excludeSymbols; |
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| 35 | llvm::StringSet<> excludeSymbolPrefixes; |
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| 36 | llvm::StringSet<> excludeSymbolSuffixes; |
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| 37 | llvm::StringSet<> excludeLibs; |
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| 38 | llvm::StringSet<> excludeObjects; |
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| 39 | |
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| 40 | const llvm::DenseSet<StringRef> &manualExcludeSymbols; |
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| 41 | |
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| 42 | bool shouldExport(Defined *sym) const; |
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| 43 | |
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| 44 | private: |
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| 45 | COFFLinkerContext &ctx; |
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| 46 | }; |
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| 47 | |
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| 48 | void writeDefFile(StringRef name, const std::vector<Export> &exports); |
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| 49 | |
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| 50 | // The -wrap option is a feature to rename symbols so that you can write |
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| 51 | // wrappers for existing functions. If you pass `-wrap:foo`, all |
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| 52 | // occurrences of symbol `foo` are resolved to `__wrap_foo` (so, you are |
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| 53 | // expected to write `__wrap_foo` function as a wrapper). The original |
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| 54 | // symbol becomes accessible as `__real_foo`, so you can call that from your |
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| 55 | // wrapper. |
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| 56 | // |
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| 57 | // This data structure is instantiated for each -wrap option. |
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| 58 | struct WrappedSymbol { |
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| 59 | Symbol *sym; |
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| 60 | Symbol *real; |
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| 61 | Symbol *wrap; |
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| 62 | }; |
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| 63 | |
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| 64 | std::vector<WrappedSymbol> addWrappedSymbols(COFFLinkerContext &ctx, |
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| 65 | llvm::opt::InputArgList &args); |
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| 66 | |
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| 67 | void wrapSymbols(COFFLinkerContext &ctx, ArrayRef<WrappedSymbol> wrapped); |
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| 68 | |
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| 69 | } // namespace lld::coff |
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| 70 | |
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| 71 | #endif |
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| 72 | |
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