MipsELFStreamer.cpp revision 5cdeca8b1d726790fe9687bc4a4d615d299bc151
1//===-- MipsELFStreamer.cpp - MipsELFStreamer ---------------------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===-------------------------------------------------------------------===// 9#include "MCTargetDesc/MipsELFStreamer.h" 10#include "MipsSubtarget.h" 11#include "llvm/MC/MCAssembler.h" 12#include "llvm/MC/MCELF.h" 13#include "llvm/MC/MCELFSymbolFlags.h" 14#include "llvm/MC/MCSymbol.h" 15#include "llvm/Support/ELF.h" 16#include "llvm/Support/ErrorHandling.h" 17 18namespace llvm { 19 20 MCELFStreamer* createMipsELFStreamer(MCContext &Context, MCAsmBackend &TAB, 21 raw_ostream &OS, MCCodeEmitter *Emitter, 22 bool RelaxAll, bool NoExecStack) { 23 MipsELFStreamer *S = new MipsELFStreamer(Context, TAB, OS, Emitter, 24 RelaxAll, NoExecStack); 25 return S; 26 } 27 28 // For llc. Set a group of ELF header flags 29 void 30 MipsELFStreamer::emitELFHeaderFlagsCG(const MipsSubtarget &Subtarget) { 31 32 if (hasRawTextSupport()) 33 return; 34 35 // Update e_header flags 36 MCAssembler& MCA = getAssembler(); 37 unsigned EFlags = MCA.getELFHeaderEFlags(); 38 39 if (Subtarget.inMips16Mode()) 40 EFlags |= ELF::EF_MIPS_ARCH_ASE_M16; 41 else 42 EFlags |= ELF::EF_MIPS_NOREORDER; 43 44 // Architecture 45 if (Subtarget.hasMips64r2()) 46 EFlags |= ELF::EF_MIPS_ARCH_64R2; 47 else if (Subtarget.hasMips64()) 48 EFlags |= ELF::EF_MIPS_ARCH_64; 49 else if (Subtarget.hasMips32r2()) 50 EFlags |= ELF::EF_MIPS_ARCH_32R2; 51 else 52 EFlags |= ELF::EF_MIPS_ARCH_32; 53 54 if (Subtarget.inMicroMipsMode()) 55 EFlags |= ELF::EF_MIPS_MICROMIPS; 56 57 // ABI 58 if (Subtarget.isABI_O32()) 59 EFlags |= ELF::EF_MIPS_ABI_O32; 60 61 // Relocation Model 62 Reloc::Model RM = Subtarget.getRelocationModel(); 63 if (RM == Reloc::PIC_ || RM == Reloc::Default) 64 EFlags |= ELF::EF_MIPS_PIC; 65 else if (RM == Reloc::Static) 66 ; // Do nothing for Reloc::Static 67 else 68 llvm_unreachable("Unsupported relocation model for e_flags"); 69 70 MCA.setELFHeaderEFlags(EFlags); 71 } 72 73 // For llc. Set a symbol's STO flags 74 void 75 MipsELFStreamer::emitMipsSTOCG(const MipsSubtarget &Subtarget, 76 MCSymbol *Sym, 77 unsigned Val) { 78 79 if (hasRawTextSupport()) 80 return; 81 82 MCSymbolData &Data = getOrCreateSymbolData(Sym); 83 // The "other" values are stored in the last 6 bits of the second byte 84 // The traditional defines for STO values assume the full byte and thus 85 // the shift to pack it. 86 MCELF::setOther(Data, Val >> 2); 87 } 88 89} // namespace llvm 90