1a787b3c8e
The .option can accept 4 parameters like the LoongArch's gnu as: push, pop, relax and norelax. Reviewed By: heiher, SixWeining Pull Request: https://github.com/llvm/llvm-project/pull/110404
97 lines
3.5 KiB
C++
97 lines
3.5 KiB
C++
//===-- LoongArchELFStreamer.cpp - LoongArch ELF Target Streamer Methods --===//
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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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//
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// This file provides LoongArch specific target streamer methods.
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//
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//===----------------------------------------------------------------------===//
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#include "LoongArchELFStreamer.h"
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#include "LoongArchAsmBackend.h"
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#include "LoongArchBaseInfo.h"
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#include "llvm/BinaryFormat/ELF.h"
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#include "llvm/MC/MCAssembler.h"
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#include "llvm/MC/MCCodeEmitter.h"
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#include "llvm/MC/MCELFObjectWriter.h"
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using namespace llvm;
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// This part is for ELF object output.
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LoongArchTargetELFStreamer::LoongArchTargetELFStreamer(
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MCStreamer &S, const MCSubtargetInfo &STI)
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: LoongArchTargetStreamer(S) {
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auto &MAB = static_cast<LoongArchAsmBackend &>(
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getStreamer().getAssembler().getBackend());
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setTargetABI(LoongArchABI::computeTargetABI(
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STI.getTargetTriple(), STI.getFeatureBits(),
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MAB.getTargetOptions().getABIName()));
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}
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MCELFStreamer &LoongArchTargetELFStreamer::getStreamer() {
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return static_cast<MCELFStreamer &>(Streamer);
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}
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void LoongArchTargetELFStreamer::emitDirectiveOptionPush() {}
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void LoongArchTargetELFStreamer::emitDirectiveOptionPop() {}
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void LoongArchTargetELFStreamer::emitDirectiveOptionRelax() {}
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void LoongArchTargetELFStreamer::emitDirectiveOptionNoRelax() {}
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void LoongArchTargetELFStreamer::finish() {
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LoongArchTargetStreamer::finish();
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ELFObjectWriter &W = getStreamer().getWriter();
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LoongArchABI::ABI ABI = getTargetABI();
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// Figure out the e_flags.
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//
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// Bitness is already represented with the EI_CLASS byte in the current spec,
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// so here we only record the base ABI modifier. Also set the object file ABI
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// version to v1, as upstream LLVM cannot handle the previous stack-machine-
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// based relocs from day one.
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//
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// Refer to LoongArch ELF psABI v2.01 for details.
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unsigned EFlags = W.getELFHeaderEFlags();
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EFlags |= ELF::EF_LOONGARCH_OBJABI_V1;
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switch (ABI) {
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case LoongArchABI::ABI_ILP32S:
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case LoongArchABI::ABI_LP64S:
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EFlags |= ELF::EF_LOONGARCH_ABI_SOFT_FLOAT;
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break;
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case LoongArchABI::ABI_ILP32F:
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case LoongArchABI::ABI_LP64F:
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EFlags |= ELF::EF_LOONGARCH_ABI_SINGLE_FLOAT;
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break;
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case LoongArchABI::ABI_ILP32D:
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case LoongArchABI::ABI_LP64D:
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EFlags |= ELF::EF_LOONGARCH_ABI_DOUBLE_FLOAT;
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break;
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case LoongArchABI::ABI_Unknown:
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llvm_unreachable("Improperly initialized target ABI");
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}
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W.setELFHeaderEFlags(EFlags);
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}
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namespace {
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class LoongArchELFStreamer : public MCELFStreamer {
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public:
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LoongArchELFStreamer(MCContext &C, std::unique_ptr<MCAsmBackend> MAB,
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std::unique_ptr<MCObjectWriter> MOW,
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std::unique_ptr<MCCodeEmitter> MCE)
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: MCELFStreamer(C, std::move(MAB), std::move(MOW), std::move(MCE)) {}
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};
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} // end namespace
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namespace llvm {
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MCELFStreamer *createLoongArchELFStreamer(MCContext &C,
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std::unique_ptr<MCAsmBackend> MAB,
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std::unique_ptr<MCObjectWriter> MOW,
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std::unique_ptr<MCCodeEmitter> MCE) {
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LoongArchELFStreamer *S = new LoongArchELFStreamer(
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C, std::move(MAB), std::move(MOW), std::move(MCE));
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return S;
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}
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} // end namespace llvm
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