forked from OSchip/llvm-project
73 lines
2.1 KiB
C++
73 lines
2.1 KiB
C++
//===- OutputSegment.cpp --------------------------------------------------===//
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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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#include "OutputSegment.h"
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#include "InputSection.h"
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#include "MergedOutputSection.h"
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#include "SyntheticSections.h"
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#include "lld/Common/ErrorHandler.h"
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#include "lld/Common/Memory.h"
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#include "llvm/BinaryFormat/MachO.h"
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using namespace llvm;
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using namespace llvm::MachO;
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using namespace lld;
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using namespace lld::macho;
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static uint32_t initProt(StringRef name) {
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auto it = find_if(
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config->segmentProtections,
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[&](const SegmentProtection &segprot) { return segprot.name == name; });
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if (it != config->segmentProtections.end())
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return it->initProt;
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if (name == segment_names::text)
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return VM_PROT_READ | VM_PROT_EXECUTE;
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if (name == segment_names::pageZero)
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return 0;
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if (name == segment_names::linkEdit)
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return VM_PROT_READ;
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return VM_PROT_READ | VM_PROT_WRITE;
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}
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static uint32_t maxProt(StringRef name) {
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assert(config->target.Arch != AK_i386 &&
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"TODO: i386 has different maxProt requirements");
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return initProt(name);
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}
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size_t OutputSegment::numNonHiddenSections() const {
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size_t count = 0;
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for (const OutputSection *osec : sections)
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count += (!osec->isHidden() ? 1 : 0);
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return count;
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}
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void OutputSegment::addOutputSection(OutputSection *osec) {
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osec->parent = this;
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sections.push_back(osec);
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}
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static DenseMap<StringRef, OutputSegment *> nameToOutputSegment;
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std::vector<OutputSegment *> macho::outputSegments;
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OutputSegment *macho::getOrCreateOutputSegment(StringRef name) {
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OutputSegment *&segRef = nameToOutputSegment[name];
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if (segRef)
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return segRef;
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segRef = make<OutputSegment>();
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segRef->name = name;
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segRef->maxProt = maxProt(name);
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segRef->initProt = initProt(name);
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outputSegments.push_back(segRef);
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return segRef;
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}
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