forked from OSchip/llvm-project
109 lines
3.2 KiB
C++
109 lines
3.2 KiB
C++
//===- lib/ReaderWriter/ELF/Hexagon/HexagonLinkingContext.cpp -------------===//
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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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#include "Atoms.h"
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#include "HexagonLinkingContext.h"
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#include "HexagonTargetHandler.h"
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#include "lld/Core/File.h"
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#include "lld/Core/Pass.h"
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#include "lld/Core/PassManager.h"
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#include "lld/Core/Simple.h"
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/StringSwitch.h"
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using namespace lld;
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using namespace lld::elf;
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namespace {
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const uint8_t hexagonInitFiniAtomContent[4] = { 0 };
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// HexagonInitFini Atom
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class HexagonInitAtom : public InitFiniAtom {
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public:
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HexagonInitAtom(const File &f, StringRef function)
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: InitFiniAtom(f, ".init_array") {
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#ifndef NDEBUG
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_name = "__init_fn_";
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_name += function;
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#endif
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}
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ArrayRef<uint8_t> rawContent() const override {
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return ArrayRef<uint8_t>(hexagonInitFiniAtomContent, 4);
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}
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Alignment alignment() const override { return Alignment(2); }
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};
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class HexagonFiniAtom : public InitFiniAtom {
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public:
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HexagonFiniAtom(const File &f, StringRef function)
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: InitFiniAtom(f, ".fini_array") {
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#ifndef NDEBUG
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_name = "__fini_fn_";
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_name += function;
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#endif
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}
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ArrayRef<uint8_t> rawContent() const override {
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return ArrayRef<uint8_t>(hexagonInitFiniAtomContent, 4);
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}
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Alignment alignment() const override { return Alignment(2); }
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};
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class HexagonInitFiniFile : public SimpleFile {
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public:
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HexagonInitFiniFile(const ELFLinkingContext &context)
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: SimpleFile("command line option -init/-fini"), _ordinal(0) {}
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void addInitFunction(StringRef name) {
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Atom *initFuncAtom = new (_allocator) SimpleUndefinedAtom(*this, name);
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HexagonInitAtom *initAtom =
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(new (_allocator) HexagonInitAtom(*this, name));
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initAtom->addReferenceELF_Hexagon(llvm::ELF::R_HEX_32, 0, initFuncAtom, 0);
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initAtom->setOrdinal(_ordinal++);
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addAtom(*initFuncAtom);
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addAtom(*initAtom);
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}
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void addFiniFunction(StringRef name) {
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Atom *finiFunctionAtom = new (_allocator) SimpleUndefinedAtom(*this, name);
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HexagonFiniAtom *finiAtom =
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(new (_allocator) HexagonFiniAtom(*this, name));
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finiAtom->addReferenceELF_Hexagon(llvm::ELF::R_HEX_32, 0, finiFunctionAtom,
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0);
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finiAtom->setOrdinal(_ordinal++);
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addAtom(*finiFunctionAtom);
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addAtom(*finiAtom);
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}
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private:
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llvm::BumpPtrAllocator _allocator;
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uint64_t _ordinal;
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};
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}
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void elf::HexagonLinkingContext::createInternalFiles(
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std::vector<std::unique_ptr<File> > &result) const {
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ELFLinkingContext::createInternalFiles(result);
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std::unique_ptr<HexagonInitFiniFile> initFiniFile(
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new HexagonInitFiniFile(*this));
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for (auto ai : initFunctions())
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initFiniFile->addInitFunction(ai);
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for (auto ai:finiFunctions())
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initFiniFile->addFiniFunction(ai);
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result.push_back(std::move(initFiniFile));
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}
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HexagonLinkingContext::HexagonLinkingContext(llvm::Triple triple)
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: ELFLinkingContext(triple, std::unique_ptr<TargetHandlerBase>(
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new HexagonTargetHandler(*this))) {}
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