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//===- OutputSegment.cpp --------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "OutputSegment.h"
#include "InputSection.h"
#include "MergedOutputSection.h"
#include "SyntheticSections.h"
#include "lld/Common/ErrorHandler.h"
#include "lld/Common/Memory.h"
#include "llvm/BinaryFormat/MachO.h"
using namespace llvm;
using namespace llvm::MachO;
using namespace lld;
using namespace lld::macho;
static uint32_t initProt(StringRef name) {
if (name == segment_names::text)
return VM_PROT_READ | VM_PROT_EXECUTE;
if (name == segment_names::pageZero)
return 0;
if (name == segment_names::linkEdit)
return VM_PROT_READ;
return VM_PROT_READ | VM_PROT_WRITE;
}
static uint32_t maxProt(StringRef name) {
if (name == segment_names::pageZero)
return 0;
return VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE;
}
size_t OutputSegment::numNonHiddenSections() const {
size_t count = 0;
for (const OutputSection *osec : sections) {
count += (!osec->isHidden() ? 1 : 0);
}
return count;
}
void OutputSegment::addOutputSection(OutputSection *osec) {
osec->parent = this;
sections.push_back(osec);
}
static llvm::DenseMap<StringRef, OutputSegment *> nameToOutputSegment;
std::vector<OutputSegment *> macho::outputSegments;
OutputSegment *macho::getOrCreateOutputSegment(StringRef name) {
OutputSegment *&segRef = nameToOutputSegment[name];
if (segRef != nullptr)
return segRef;
segRef = make<OutputSegment>();
segRef->name = name;
segRef->maxProt = maxProt(name);
segRef->initProt = initProt(name);
outputSegments.push_back(segRef);
return segRef;
}
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