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