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//===-- LoongArchELFStreamer.cpp - LoongArch ELF Target Streamer Methods --===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This file provides LoongArch specific target streamer methods.
//
//===----------------------------------------------------------------------===//
#include "LoongArchELFStreamer.h"
#include "LoongArchAsmBackend.h"
#include "llvm/BinaryFormat/ELF.h"
#include "llvm/MC/MCAssembler.h"
#include "llvm/MC/MCCodeEmitter.h"
#include "llvm/MC/MCObjectWriter.h"
using namespace llvm;
// This part is for ELF object output.
LoongArchTargetELFStreamer::LoongArchTargetELFStreamer(
MCStreamer &S, const MCSubtargetInfo &STI)
: LoongArchTargetStreamer(S) {
// FIXME: select appropriate ABI.
setTargetABI(STI.getTargetTriple().isArch64Bit() ? LoongArchABI::ABI_LP64D
: LoongArchABI::ABI_ILP32D);
}
MCELFStreamer &LoongArchTargetELFStreamer::getStreamer() {
return static_cast<MCELFStreamer &>(Streamer);
}
void LoongArchTargetELFStreamer::finish() {
LoongArchTargetStreamer::finish();
MCAssembler &MCA = getStreamer().getAssembler();
LoongArchABI::ABI ABI = getTargetABI();
// Figure out the e_flags.
//
// Bitness is already represented with the EI_CLASS byte in the current spec,
// so here we only record the base ABI modifier. Also set the object file ABI
// version to v1, as upstream LLVM cannot handle the previous stack-machine-
// based relocs from day one.
//
// Refer to LoongArch ELF psABI v2.01 for details.
unsigned EFlags = MCA.getELFHeaderEFlags();
EFlags |= ELF::EF_LOONGARCH_OBJABI_V1;
switch (ABI) {
case LoongArchABI::ABI_ILP32S:
case LoongArchABI::ABI_LP64S:
EFlags |= ELF::EF_LOONGARCH_ABI_SOFT_FLOAT;
break;
case LoongArchABI::ABI_ILP32F:
case LoongArchABI::ABI_LP64F:
EFlags |= ELF::EF_LOONGARCH_ABI_SINGLE_FLOAT;
break;
case LoongArchABI::ABI_ILP32D:
case LoongArchABI::ABI_LP64D:
EFlags |= ELF::EF_LOONGARCH_ABI_DOUBLE_FLOAT;
break;
case LoongArchABI::ABI_Unknown:
llvm_unreachable("Improperly initialized target ABI");
}
MCA.setELFHeaderEFlags(EFlags);
}
namespace {
class LoongArchELFStreamer : public MCELFStreamer {
public:
LoongArchELFStreamer(MCContext &C, std::unique_ptr<MCAsmBackend> MAB,
std::unique_ptr<MCObjectWriter> MOW,
std::unique_ptr<MCCodeEmitter> MCE)
: MCELFStreamer(C, std::move(MAB), std::move(MOW), std::move(MCE)) {}
};
} // end namespace
namespace llvm {
MCELFStreamer *createLoongArchELFStreamer(MCContext &C,
std::unique_ptr<MCAsmBackend> MAB,
std::unique_ptr<MCObjectWriter> MOW,
std::unique_ptr<MCCodeEmitter> MCE,
bool RelaxAll) {
LoongArchELFStreamer *S = new LoongArchELFStreamer(
C, std::move(MAB), std::move(MOW), std::move(MCE));
S->getAssembler().setRelaxAll(RelaxAll);
return S;
}
} // end namespace llvm
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