diff options
Diffstat (limited to 'lib/CodeGen/AsmPrinter/DwarfPrinter.cpp')
| -rw-r--r-- | lib/CodeGen/AsmPrinter/DwarfPrinter.cpp | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/lib/CodeGen/AsmPrinter/DwarfPrinter.cpp b/lib/CodeGen/AsmPrinter/DwarfPrinter.cpp index f50c684e35..99b46d61a0 100644 --- a/lib/CodeGen/AsmPrinter/DwarfPrinter.cpp +++ b/lib/CodeGen/AsmPrinter/DwarfPrinter.cpp @@ -18,6 +18,7 @@ #include "llvm/CodeGen/MachineFunction.h" #include "llvm/CodeGen/MachineModuleInfo.h" #include "llvm/MC/MCAsmInfo.h" +#include "llvm/MC/MCStreamer.h" #include "llvm/MC/MCSymbol.h" #include "llvm/Target/TargetData.h" #include "llvm/Target/TargetFrameInfo.h" @@ -41,6 +42,50 @@ void DwarfPrinter::PrintRelDirective(bool Force32Bit, bool isInSection) const { O << MAI->getData64bitsDirective(); } +static const char *DecodeDWARFEncoding(unsigned Encoding) { + switch (Encoding) { + case dwarf::DW_EH_PE_absptr: return "absptr"; + case dwarf::DW_EH_PE_omit: return "omit"; + case dwarf::DW_EH_PE_pcrel: return "pcrel"; + case dwarf::DW_EH_PE_udata4: return "udata4"; + case dwarf::DW_EH_PE_udata8: return "udata8"; + case dwarf::DW_EH_PE_sdata4: return "sdata4"; + case dwarf::DW_EH_PE_sdata8: return "sdata8"; + case dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_udata4: return "pcrel udata4"; + case dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4: return "pcrel sdata4"; + case dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_udata8: return "pcrel udata8"; + case dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata8: return "pcrel sdata8"; + case dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |dwarf::DW_EH_PE_udata4: + return "indirect pcrel udata4"; + case dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |dwarf::DW_EH_PE_sdata4: + return "indirect pcrel sdata4"; + case dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |dwarf::DW_EH_PE_udata8: + return "indirect pcrel udata8"; + case dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |dwarf::DW_EH_PE_sdata8: + return "indirect pcrel sdata8"; + } + + return "<unknown encoding>"; +} + +/// EmitEncodingByte - Emit a .byte 42 directive that corresponds to an +/// encoding. If verbose assembly output is enabled, we output comments +/// describing the encoding. Desc is an optional string saying what the +/// encoding is specifying (e.g. "LSDA"). +void DwarfPrinter::EmitEncodingByte(unsigned Val, const char *Desc) { + if (Asm->VerboseAsm) { + if (Desc != 0) + Asm->OutStreamer.AddComment(Twine(Desc)+" Encoding = " + + Twine(DecodeDWARFEncoding(Val))); + else + Asm->OutStreamer.AddComment(Twine("Encoding = ") + + DecodeDWARFEncoding(Val)); + } + + Asm->OutStreamer.EmitIntValue(Val, 1, 0/*addrspace*/); +} + + /// PrintLabelName - Print label name in form used by Dwarf writer. /// void DwarfPrinter::PrintLabelName(const char *Tag, unsigned Number) const { |