diff options
Diffstat (limited to 'llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp b/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp index f6b91a2f023..2b571a02b4d 100644 --- a/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp +++ b/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp @@ -95,6 +95,156 @@ void TargetLoweringObjectFileELF::Initialize(MCContext &Ctx, const TargetMachine &TgtM) { TargetLoweringObjectFile::Initialize(Ctx, TgtM); TM = &TgtM; + + bool Large = TgtM.getCodeModel() == CodeModel::Large; + + switch (TgtM.getTargetTriple().getArch()) { + case Triple::arm: + case Triple::armeb: + case Triple::thumb: + case Triple::thumbeb: + if (Ctx.getAsmInfo()->getExceptionHandlingType() == ExceptionHandling::ARM) + break; + // Fallthrough if not using EHABI + LLVM_FALLTHROUGH; + case Triple::ppc: + case Triple::x86: + PersonalityEncoding = isPositionIndependent() + ? dwarf::DW_EH_PE_indirect | + dwarf::DW_EH_PE_pcrel | + dwarf::DW_EH_PE_sdata4 + : dwarf::DW_EH_PE_absptr; + LSDAEncoding = isPositionIndependent() + ? dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4 + : dwarf::DW_EH_PE_absptr; + TTypeEncoding = isPositionIndependent() + ? dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | + dwarf::DW_EH_PE_sdata4 + : dwarf::DW_EH_PE_absptr; + break; + case Triple::x86_64: + if (isPositionIndependent()) { + PersonalityEncoding = + dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | + (Large ? dwarf::DW_EH_PE_sdata8 : dwarf::DW_EH_PE_sdata4); + LSDAEncoding = dwarf::DW_EH_PE_pcrel | + (Large ? dwarf::DW_EH_PE_sdata8 : dwarf::DW_EH_PE_sdata4); + TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | + (Large ? dwarf::DW_EH_PE_sdata8 : dwarf::DW_EH_PE_sdata4); + } else { + PersonalityEncoding = + Large ? dwarf::DW_EH_PE_absptr : dwarf::DW_EH_PE_udata4; + LSDAEncoding = Large ? dwarf::DW_EH_PE_absptr : dwarf::DW_EH_PE_udata4; + TTypeEncoding = Large ? dwarf::DW_EH_PE_absptr : dwarf::DW_EH_PE_udata4; + } + break; + case Triple::hexagon: + PersonalityEncoding = dwarf::DW_EH_PE_absptr; + LSDAEncoding = dwarf::DW_EH_PE_absptr; + TTypeEncoding = dwarf::DW_EH_PE_absptr; + if (isPositionIndependent()) { + PersonalityEncoding |= dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel; + LSDAEncoding |= dwarf::DW_EH_PE_pcrel; + TTypeEncoding |= dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel; + } + break; + case Triple::aarch64: + case Triple::aarch64_be: + // The small model guarantees static code/data size < 4GB, but not where it + // will be in memory. Most of these could end up >2GB away so even a signed + // pc-relative 32-bit address is insufficient, theoretically. + if (isPositionIndependent()) { + PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | + dwarf::DW_EH_PE_sdata8; + LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata8; + TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | + dwarf::DW_EH_PE_sdata8; + } else { + PersonalityEncoding = dwarf::DW_EH_PE_absptr; + LSDAEncoding = dwarf::DW_EH_PE_absptr; + TTypeEncoding = dwarf::DW_EH_PE_absptr; + } + break; + case Triple::lanai: + LSDAEncoding = dwarf::DW_EH_PE_absptr; + PersonalityEncoding = dwarf::DW_EH_PE_absptr; + TTypeEncoding = dwarf::DW_EH_PE_absptr; + break; + case Triple::mips: + case Triple::mipsel: + case Triple::mips64: + case Triple::mips64el: + // MIPS uses indirect pointer to refer personality functions and types, so + // that the eh_frame section can be read-only. DW.ref.personality will be + // generated for relocation. + PersonalityEncoding = dwarf::DW_EH_PE_indirect; + // FIXME: The N64 ABI probably ought to use DW_EH_PE_sdata8 but we can't + // identify N64 from just a triple. + TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | + dwarf::DW_EH_PE_sdata4; + // We don't support PC-relative LSDA references in GAS so we use the default + // DW_EH_PE_absptr for those. + + // FreeBSD must be explicit about the data size and using pcrel since it's + // assembler/linker won't do the automatic conversion that the Linux tools + // do. + if (TgtM.getTargetTriple().isOSFreeBSD()) { + PersonalityEncoding |= dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4; + LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4; + } + break; + case Triple::ppc64: + case Triple::ppc64le: + PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | + dwarf::DW_EH_PE_udata8; + LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_udata8; + TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | + dwarf::DW_EH_PE_udata8; + break; + case Triple::sparcel: + case Triple::sparc: + if (isPositionIndependent()) { + LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4; + PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | + dwarf::DW_EH_PE_sdata4; + TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | + dwarf::DW_EH_PE_sdata4; + } else { + LSDAEncoding = dwarf::DW_EH_PE_absptr; + PersonalityEncoding = dwarf::DW_EH_PE_absptr; + TTypeEncoding = dwarf::DW_EH_PE_absptr; + } + break; + case Triple::sparcv9: + LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4; + if (isPositionIndependent()) { + PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | + dwarf::DW_EH_PE_sdata4; + TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | + dwarf::DW_EH_PE_sdata4; + } else { + PersonalityEncoding = dwarf::DW_EH_PE_absptr; + TTypeEncoding = dwarf::DW_EH_PE_absptr; + } + break; + case Triple::systemz: + // All currently-defined code models guarantee that 4-byte PC-relative + // values will be in range. + if (isPositionIndependent()) { + PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | + dwarf::DW_EH_PE_sdata4; + LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4; + TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | + dwarf::DW_EH_PE_sdata4; + } else { + PersonalityEncoding = dwarf::DW_EH_PE_absptr; + LSDAEncoding = dwarf::DW_EH_PE_absptr; + TTypeEncoding = dwarf::DW_EH_PE_absptr; + } + break; + default: + break; + } } void TargetLoweringObjectFileELF::emitModuleMetadata(MCStreamer &Streamer, @@ -684,6 +834,12 @@ void TargetLoweringObjectFileMachO::Initialize(MCContext &Ctx, MachO::S_MOD_TERM_FUNC_POINTERS, SectionKind::getData()); } + + PersonalityEncoding = + dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4; + LSDAEncoding = dwarf::DW_EH_PE_pcrel; + TTypeEncoding = + dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4; } void TargetLoweringObjectFileMachO::emitModuleMetadata(MCStreamer &Streamer, |
