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//===-- MipsELFStreamer.cpp - MipsELFStreamer ---------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===-------------------------------------------------------------------===//
#include "MCTargetDesc/MipsELFStreamer.h"
#include "MipsSubtarget.h"
#include "llvm/MC/MCAssembler.h"
#include "llvm/MC/MCELF.h"
#include "llvm/MC/MCELFSymbolFlags.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Support/ELF.h"
#include "llvm/Support/ErrorHandling.h"
namespace llvm {
MCELFStreamer* createMipsELFStreamer(MCContext &Context, MCAsmBackend &TAB,
raw_ostream &OS, MCCodeEmitter *Emitter,
bool RelaxAll, bool NoExecStack) {
MipsELFStreamer *S = new MipsELFStreamer(Context, TAB, OS, Emitter,
RelaxAll, NoExecStack);
return S;
}
// For llc. Set a group of ELF header flags
void
MipsELFStreamer::emitELFHeaderFlagsCG(const MipsSubtarget &Subtarget) {
if (hasRawTextSupport())
return;
// Update e_header flags
MCAssembler& MCA = getAssembler();
unsigned EFlags = MCA.getELFHeaderEFlags();
if (Subtarget.inMips16Mode())
EFlags |= ELF::EF_MIPS_ARCH_ASE_M16;
else
EFlags |= ELF::EF_MIPS_NOREORDER;
// Architecture
if (Subtarget.hasMips64r2())
EFlags |= ELF::EF_MIPS_ARCH_64R2;
else if (Subtarget.hasMips64())
EFlags |= ELF::EF_MIPS_ARCH_64;
else if (Subtarget.hasMips32r2())
EFlags |= ELF::EF_MIPS_ARCH_32R2;
else
EFlags |= ELF::EF_MIPS_ARCH_32;
if (Subtarget.inMicroMipsMode())
EFlags |= ELF::EF_MIPS_MICROMIPS;
// ABI
if (Subtarget.isABI_O32())
EFlags |= ELF::EF_MIPS_ABI_O32;
// Relocation Model
Reloc::Model RM = Subtarget.getRelocationModel();
if (RM == Reloc::PIC_ || RM == Reloc::Default)
EFlags |= ELF::EF_MIPS_PIC;
else if (RM == Reloc::Static)
; // Do nothing for Reloc::Static
else
llvm_unreachable("Unsupported relocation model for e_flags");
MCA.setELFHeaderEFlags(EFlags);
}
// For llc. Set a symbol's STO flags
void
MipsELFStreamer::emitMipsSTOCG(const MipsSubtarget &Subtarget,
MCSymbol *Sym,
unsigned Val) {
if (hasRawTextSupport())
return;
MCSymbolData &Data = getOrCreateSymbolData(Sym);
// The "other" values are stored in the last 6 bits of the second byte
// The traditional defines for STO values assume the full byte and thus
// the shift to pack it.
MCELF::setOther(Data, Val >> 2);
}
} // namespace llvm
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