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//===- lib/ReaderWriter/MachO/MachOTargetInfo.cpp -------------------------===//
//
// The LLVM Linker
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "lld/ReaderWriter/MachOTargetInfo.h"
#include "GOTPass.hpp"
#include "StubsPass.hpp"
#include "lld/Core/LinkerOptions.h"
#include "lld/Core/PassManager.h"
#include "llvm/ADT/Triple.h"
#include "llvm/Support/MachO.h"
namespace lld {
uint32_t MachOTargetInfo::getCPUType() const {
switch (getTriple().getArch()) {
case llvm::Triple::x86:
return llvm::MachO::CPUTypeI386;
case llvm::Triple::x86_64:
return llvm::MachO::CPUTypeX86_64;
case llvm::Triple::arm:
return llvm::MachO::CPUTypeARM;
default:
llvm_unreachable("Unknown arch type");
}
}
uint32_t MachOTargetInfo::getCPUSubType() const {
switch (getTriple().getArch()) {
case llvm::Triple::x86:
return llvm::MachO::CPUSubType_I386_ALL;
case llvm::Triple::x86_64:
return llvm::MachO::CPUSubType_X86_64_ALL;
case llvm::Triple::arm:
return llvm::MachO::CPUSubType_ARM_ALL;
default:
llvm_unreachable("Unknown arch type");
}
}
bool MachOTargetInfo::addEntryPointLoadCommand() const {
switch (_options._outputKind) {
case OutputKind::Executable:
return true;
default:
return false;
}
}
bool MachOTargetInfo::addUnixThreadLoadCommand() const {
switch (_options._outputKind) {
case OutputKind::Executable:
return true;
default:
return false;
}
}
class GenericMachOTargetInfo LLVM_FINAL : public MachOTargetInfo {
public:
GenericMachOTargetInfo(const LinkerOptions &lo) : MachOTargetInfo(lo) {}
virtual uint64_t getPageSize() const { return 0x1000; }
virtual uint64_t getPageZeroSize() const { return getPageSize(); }
virtual StringRef getEntry() const {
if (_options._outputKind != OutputKind::Executable)
return "";
if (!_options._entrySymbol.empty())
return _options._entrySymbol;
return "_main";
}
virtual void addPasses(PassManager &pm) const {
pm.add(std::unique_ptr<Pass>(new mach_o::GOTPass));
pm.add(std::unique_ptr<Pass>(new mach_o::StubsPass(*this)));
}
};
std::unique_ptr<MachOTargetInfo>
MachOTargetInfo::create(const LinkerOptions &lo) {
return std::unique_ptr<MachOTargetInfo>(new GenericMachOTargetInfo(lo));
}
} // end namespace lld
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