48 lines
1.9 KiB
C++
48 lines
1.9 KiB
C++
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//===-- RISCVMCAsmInfo.cpp - RISCV Asm properties -------------------------===//
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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 contains the declarations of the RISCVMCAsmInfo properties.
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//
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//===----------------------------------------------------------------------===//
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#include "RISCVMCAsmInfo.h"
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#include "MCTargetDesc/RISCVMCExpr.h"
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#include "llvm/ADT/Triple.h"
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#include "llvm/BinaryFormat/Dwarf.h"
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#include "llvm/MC/MCStreamer.h"
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using namespace llvm;
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void RISCVMCAsmInfo::anchor() {}
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RISCVMCAsmInfo::RISCVMCAsmInfo(const Triple &TT) {
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CodePointerSize = CalleeSaveStackSlotSize = TT.isArch64Bit() ? 8 : 4;
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CommentString = "#";
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AlignmentIsInBytes = false;
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SupportsDebugInformation = true;
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ExceptionsType = ExceptionHandling::DwarfCFI;
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Data16bitsDirective = "\t.half\t";
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Data32bitsDirective = "\t.word\t";
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}
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const MCExpr *RISCVMCAsmInfo::getExprForFDESymbol(const MCSymbol *Sym,
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unsigned Encoding,
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MCStreamer &Streamer) const {
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if (!(Encoding & dwarf::DW_EH_PE_pcrel))
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return MCAsmInfo::getExprForFDESymbol(Sym, Encoding, Streamer);
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// The default symbol subtraction results in an ADD/SUB relocation pair.
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// Processing this relocation pair is problematic when linker relaxation is
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// enabled, so we follow binutils in using the R_RISCV_32_PCREL relocation
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// for the FDE initial location.
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MCContext &Ctx = Streamer.getContext();
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const MCExpr *ME =
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MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None, Ctx);
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assert(Encoding & dwarf::DW_EH_PE_sdata4 && "Unexpected encoding");
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return RISCVMCExpr::create(ME, RISCVMCExpr::VK_RISCV_32_PCREL, Ctx);
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}
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