diff options
Diffstat (limited to 'contrib/llvm-project/llvm/lib/MC/MCAsmBackend.cpp')
-rw-r--r-- | contrib/llvm-project/llvm/lib/MC/MCAsmBackend.cpp | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/contrib/llvm-project/llvm/lib/MC/MCAsmBackend.cpp b/contrib/llvm-project/llvm/lib/MC/MCAsmBackend.cpp new file mode 100644 index 000000000000..4ed9d8593336 --- /dev/null +++ b/contrib/llvm-project/llvm/lib/MC/MCAsmBackend.cpp @@ -0,0 +1,119 @@ +//===- MCAsmBackend.cpp - Target MC Assembly Backend ----------------------===// +// +// 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 "llvm/MC/MCAsmBackend.h" +#include "llvm/ADT/None.h" +#include "llvm/ADT/STLArrayExtras.h" +#include "llvm/MC/MCDXContainerWriter.h" +#include "llvm/MC/MCELFObjectWriter.h" +#include "llvm/MC/MCFixupKindInfo.h" +#include "llvm/MC/MCMachObjectWriter.h" +#include "llvm/MC/MCObjectWriter.h" +#include "llvm/MC/MCSPIRVObjectWriter.h" +#include "llvm/MC/MCWasmObjectWriter.h" +#include "llvm/MC/MCWinCOFFObjectWriter.h" +#include "llvm/MC/MCXCOFFObjectWriter.h" +#include <cassert> +#include <cstddef> +#include <cstdint> + +using namespace llvm; + +MCAsmBackend::MCAsmBackend(support::endianness Endian) : Endian(Endian) {} + +MCAsmBackend::~MCAsmBackend() = default; + +std::unique_ptr<MCObjectWriter> +MCAsmBackend::createObjectWriter(raw_pwrite_stream &OS) const { + auto TW = createObjectTargetWriter(); + switch (TW->getFormat()) { + case Triple::ELF: + return createELFObjectWriter(cast<MCELFObjectTargetWriter>(std::move(TW)), OS, + Endian == support::little); + case Triple::MachO: + return createMachObjectWriter(cast<MCMachObjectTargetWriter>(std::move(TW)), + OS, Endian == support::little); + case Triple::COFF: + return createWinCOFFObjectWriter( + cast<MCWinCOFFObjectTargetWriter>(std::move(TW)), OS); + case Triple::SPIRV: + return createSPIRVObjectWriter( + cast<MCSPIRVObjectTargetWriter>(std::move(TW)), OS); + case Triple::Wasm: + return createWasmObjectWriter(cast<MCWasmObjectTargetWriter>(std::move(TW)), + OS); + case Triple::XCOFF: + return createXCOFFObjectWriter( + cast<MCXCOFFObjectTargetWriter>(std::move(TW)), OS); + case Triple::DXContainer: + return createDXContainerObjectWriter( + cast<MCDXContainerTargetWriter>(std::move(TW)), OS); + default: + llvm_unreachable("unexpected object format"); + } +} + +std::unique_ptr<MCObjectWriter> +MCAsmBackend::createDwoObjectWriter(raw_pwrite_stream &OS, + raw_pwrite_stream &DwoOS) const { + auto TW = createObjectTargetWriter(); + switch (TW->getFormat()) { + case Triple::ELF: + return createELFDwoObjectWriter( + cast<MCELFObjectTargetWriter>(std::move(TW)), OS, DwoOS, + Endian == support::little); + case Triple::Wasm: + return createWasmDwoObjectWriter( + cast<MCWasmObjectTargetWriter>(std::move(TW)), OS, DwoOS); + default: + report_fatal_error("dwo only supported with ELF and Wasm"); + } +} + +Optional<MCFixupKind> MCAsmBackend::getFixupKind(StringRef Name) const { + return None; +} + +const MCFixupKindInfo &MCAsmBackend::getFixupKindInfo(MCFixupKind Kind) const { + static const MCFixupKindInfo Builtins[] = { + {"FK_NONE", 0, 0, 0}, + {"FK_Data_1", 0, 8, 0}, + {"FK_Data_2", 0, 16, 0}, + {"FK_Data_4", 0, 32, 0}, + {"FK_Data_8", 0, 64, 0}, + {"FK_Data_6b", 0, 6, 0}, + {"FK_PCRel_1", 0, 8, MCFixupKindInfo::FKF_IsPCRel}, + {"FK_PCRel_2", 0, 16, MCFixupKindInfo::FKF_IsPCRel}, + {"FK_PCRel_4", 0, 32, MCFixupKindInfo::FKF_IsPCRel}, + {"FK_PCRel_8", 0, 64, MCFixupKindInfo::FKF_IsPCRel}, + {"FK_GPRel_1", 0, 8, 0}, + {"FK_GPRel_2", 0, 16, 0}, + {"FK_GPRel_4", 0, 32, 0}, + {"FK_GPRel_8", 0, 64, 0}, + {"FK_DTPRel_4", 0, 32, 0}, + {"FK_DTPRel_8", 0, 64, 0}, + {"FK_TPRel_4", 0, 32, 0}, + {"FK_TPRel_8", 0, 64, 0}, + {"FK_SecRel_1", 0, 8, 0}, + {"FK_SecRel_2", 0, 16, 0}, + {"FK_SecRel_4", 0, 32, 0}, + {"FK_SecRel_8", 0, 64, 0}, + }; + + assert((size_t)Kind <= array_lengthof(Builtins) && "Unknown fixup kind"); + return Builtins[Kind]; +} + +bool MCAsmBackend::fixupNeedsRelaxationAdvanced( + const MCFixup &Fixup, bool Resolved, uint64_t Value, + const MCRelaxableFragment *DF, const MCAsmLayout &Layout, + const bool WasForced) const { + if (!Resolved) + return true; + return fixupNeedsRelaxation(Fixup, Value, DF, Layout); +} |