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[COFF] Move MinGW specific functions/classes to a separate file. NFC.
Differential Revision: https://reviews.llvm.org/D39067 llvm-svn: 316178
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,119 @@ | ||
| //===- MinGW.cpp ----------------------------------------------------------===// | ||
| // | ||
| // The LLVM Linker | ||
| // | ||
| // This file is distributed under the University of Illinois Open Source | ||
| // License. See LICENSE.TXT for details. | ||
| // | ||
| //===----------------------------------------------------------------------===// | ||
|
|
||
| #include "MinGW.h" | ||
| #include "Error.h" | ||
| #include "llvm/Object/COFF.h" | ||
| #include "llvm/Support/Path.h" | ||
| #include "llvm/Support/raw_ostream.h" | ||
|
|
||
| using namespace lld; | ||
| using namespace lld::coff; | ||
| using namespace llvm; | ||
| using namespace llvm::COFF; | ||
|
|
||
| AutoExporter::AutoExporter() { | ||
| if (Config->Machine == I386) | ||
| ExcludeSymbols = { | ||
| "__NULL_IMPORT_DESCRIPTOR", | ||
| "__pei386_runtime_relocator", | ||
| "_do_pseudo_reloc", | ||
| "_impure_ptr", | ||
| "__impure_ptr", | ||
| "__fmode", | ||
| "_environ", | ||
| "___dso_handle", | ||
| // These are the MinGW names that differ from the standard | ||
| // ones (lacking an extra underscore). | ||
| "_DllMain@12", | ||
| "_DllEntryPoint@12", | ||
| "_DllMainCRTStartup@12", | ||
| }; | ||
| else | ||
| ExcludeSymbols = { | ||
| "_NULL_IMPORT_DESCRIPTOR", | ||
| "_pei386_runtime_relocator", | ||
| "do_pseudo_reloc", | ||
| "impure_ptr", | ||
| "_impure_ptr", | ||
| "_fmode", | ||
| "environ", | ||
| "__dso_handle", | ||
| // These are the MinGW names that differ from the standard | ||
| // ones (lacking an extra underscore). | ||
| "DllMain", | ||
| "DllEntryPoint", | ||
| "DllMainCRTStartup", | ||
| }; | ||
|
|
||
| ExcludeLibs = { | ||
| "libgcc", | ||
| "libgcc_s", | ||
| "libstdc++", | ||
| "libmingw32", | ||
| "libmingwex", | ||
| "libg2c", | ||
| "libsupc++", | ||
| "libobjc", | ||
| "libgcj", | ||
| "libclang_rt.builtins-aarch64", | ||
| "libclang_rt.builtins-arm", | ||
| "libclang_rt.builtins-i386", | ||
| "libclang_rt.builtins-x86_64", | ||
| }; | ||
| ExcludeObjects = { | ||
| "crt0.o", | ||
| "crt1.o", | ||
| "crt1u.o", | ||
| "crt2.o", | ||
| "crt2u.o", | ||
| "dllcrt1.o", | ||
| "dllcrt2.o", | ||
| "gcrt0.o", | ||
| "gcrt1.o", | ||
| "gcrt2.o", | ||
| "crtbegin.o", | ||
| "crtend.o", | ||
| }; | ||
| } | ||
|
|
||
| bool AutoExporter::shouldExport(Defined *Sym) const { | ||
| if (!Sym || !Sym->isLive() || !Sym->getChunk()) | ||
| return false; | ||
| if (ExcludeSymbols.count(Sym->getName())) | ||
| return false; | ||
| StringRef LibName = sys::path::filename(Sym->getFile()->ParentName); | ||
| // Drop the file extension. | ||
| LibName = LibName.substr(0, LibName.rfind('.')); | ||
| if (ExcludeLibs.count(LibName)) | ||
| return false; | ||
| StringRef FileName = sys::path::filename(Sym->getFile()->getName()); | ||
| if (LibName.empty() && ExcludeObjects.count(FileName)) | ||
| return false; | ||
| return true; | ||
| } | ||
|
|
||
| void coff::writeDefFile(StringRef Name) { | ||
| std::error_code EC; | ||
| raw_fd_ostream OS(Name, EC, sys::fs::F_None); | ||
| if (EC) | ||
| fatal("cannot open " + Name + ": " + EC.message()); | ||
|
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| OS << "EXPORTS\n"; | ||
| for (Export &E : Config->Exports) { | ||
| OS << " " << E.ExportName << " " | ||
| << "@" << E.Ordinal; | ||
| if (auto *Def = dyn_cast_or_null<Defined>(E.Sym)) { | ||
| if (Def && Def->getChunk() && | ||
| !(Def->getChunk()->getPermissions() & IMAGE_SCN_MEM_EXECUTE)) | ||
| OS << " DATA"; | ||
| } | ||
| OS << "\n"; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,38 @@ | ||
| //===- MinGW.h --------------------------------------------------*- C++ -*-===// | ||
| // | ||
| // The LLVM Linker | ||
| // | ||
| // This file is distributed under the University of Illinois Open Source | ||
| // License. See LICENSE.TXT for details. | ||
| // | ||
| //===----------------------------------------------------------------------===// | ||
|
|
||
| #ifndef LLD_COFF_MINGW_H | ||
| #define LLD_COFF_MINGW_H | ||
|
|
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| #include "Config.h" | ||
| #include "Symbols.h" | ||
| #include "lld/Common/LLVM.h" | ||
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| namespace lld { | ||
| namespace coff { | ||
|
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| // Logic for deciding what symbols to export, when exporting all | ||
| // symbols for MinGW. | ||
| class AutoExporter { | ||
| public: | ||
| AutoExporter(); | ||
|
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| StringSet<> ExcludeSymbols; | ||
| StringSet<> ExcludeLibs; | ||
| StringSet<> ExcludeObjects; | ||
|
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| bool shouldExport(Defined *Sym) const; | ||
| }; | ||
|
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| void writeDefFile(StringRef Name); | ||
|
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| } // namespace coff | ||
| } // namespace lld | ||
|
|
||
| #endif |
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