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6bd26db06a
E.g. for x86_64, previously each symbol's thunk was 87 bytes. Now there's a 12 byte thunk per symbol, plus a shared 83 byte tail function. This is similar to what both MS link.exe and GNU tools do for delay imports. Differential Revision: https://reviews.llvm.org/D64288 llvm-svn: 365823
83 lines
2.2 KiB
C++
83 lines
2.2 KiB
C++
//===- DLL.h ----------------------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLD_COFF_DLL_H
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#define LLD_COFF_DLL_H
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#include "Chunks.h"
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#include "Symbols.h"
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namespace lld {
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namespace coff {
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// Windows-specific.
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// IdataContents creates all chunks for the DLL import table.
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// You are supposed to call add() to add symbols and then
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// call create() to populate the chunk vectors.
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class IdataContents {
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public:
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void add(DefinedImportData *sym) { imports.push_back(sym); }
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bool empty() { return imports.empty(); }
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void create();
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std::vector<DefinedImportData *> imports;
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std::vector<Chunk *> dirs;
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std::vector<Chunk *> lookups;
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std::vector<Chunk *> addresses;
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std::vector<Chunk *> hints;
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std::vector<Chunk *> dllNames;
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};
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// Windows-specific.
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// DelayLoadContents creates all chunks for the delay-load DLL import table.
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class DelayLoadContents {
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public:
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void add(DefinedImportData *sym) { imports.push_back(sym); }
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bool empty() { return imports.empty(); }
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void create(Defined *helper);
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std::vector<Chunk *> getChunks();
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std::vector<Chunk *> getDataChunks();
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ArrayRef<Chunk *> getCodeChunks() { return thunks; }
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uint64_t getDirRVA() { return dirs[0]->getRVA(); }
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uint64_t getDirSize();
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private:
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Chunk *newThunkChunk(DefinedImportData *s, Chunk *tailMerge);
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Chunk *newTailMergeChunk(Chunk *dir);
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Defined *helper;
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std::vector<DefinedImportData *> imports;
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std::vector<Chunk *> dirs;
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std::vector<Chunk *> moduleHandles;
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std::vector<Chunk *> addresses;
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std::vector<Chunk *> names;
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std::vector<Chunk *> hintNames;
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std::vector<Chunk *> thunks;
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std::vector<Chunk *> dllNames;
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};
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// Windows-specific.
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// EdataContents creates all chunks for the DLL export table.
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class EdataContents {
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public:
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EdataContents();
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std::vector<Chunk *> chunks;
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uint64_t getRVA() { return chunks[0]->getRVA(); }
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uint64_t getSize() {
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return chunks.back()->getRVA() + chunks.back()->getSize() - getRVA();
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}
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};
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} // namespace coff
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} // namespace lld
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#endif
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