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5cdeca8b1d
excluding visibility bits. Mips (o32 abi) specific e_header setting. EF_MIPS_ABI_O32 needs to be set in the ELF header flags for o32 abi output. Contributer: Reed Kotler git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175569 91177308-0d34-0410-b5e6-96231b3b80d8
90 lines
2.7 KiB
C++
90 lines
2.7 KiB
C++
//===-- MipsELFStreamer.cpp - MipsELFStreamer ---------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===-------------------------------------------------------------------===//
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#include "MCTargetDesc/MipsELFStreamer.h"
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#include "MipsSubtarget.h"
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#include "llvm/MC/MCAssembler.h"
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#include "llvm/MC/MCELF.h"
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#include "llvm/MC/MCELFSymbolFlags.h"
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#include "llvm/MC/MCSymbol.h"
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#include "llvm/Support/ELF.h"
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#include "llvm/Support/ErrorHandling.h"
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namespace llvm {
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MCELFStreamer* createMipsELFStreamer(MCContext &Context, MCAsmBackend &TAB,
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raw_ostream &OS, MCCodeEmitter *Emitter,
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bool RelaxAll, bool NoExecStack) {
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MipsELFStreamer *S = new MipsELFStreamer(Context, TAB, OS, Emitter,
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RelaxAll, NoExecStack);
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return S;
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}
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// For llc. Set a group of ELF header flags
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void
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MipsELFStreamer::emitELFHeaderFlagsCG(const MipsSubtarget &Subtarget) {
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if (hasRawTextSupport())
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return;
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// Update e_header flags
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MCAssembler& MCA = getAssembler();
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unsigned EFlags = MCA.getELFHeaderEFlags();
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if (Subtarget.inMips16Mode())
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EFlags |= ELF::EF_MIPS_ARCH_ASE_M16;
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else
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EFlags |= ELF::EF_MIPS_NOREORDER;
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// Architecture
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if (Subtarget.hasMips64r2())
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EFlags |= ELF::EF_MIPS_ARCH_64R2;
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else if (Subtarget.hasMips64())
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EFlags |= ELF::EF_MIPS_ARCH_64;
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else if (Subtarget.hasMips32r2())
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EFlags |= ELF::EF_MIPS_ARCH_32R2;
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else
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EFlags |= ELF::EF_MIPS_ARCH_32;
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if (Subtarget.inMicroMipsMode())
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EFlags |= ELF::EF_MIPS_MICROMIPS;
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// ABI
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if (Subtarget.isABI_O32())
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EFlags |= ELF::EF_MIPS_ABI_O32;
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// Relocation Model
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Reloc::Model RM = Subtarget.getRelocationModel();
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if (RM == Reloc::PIC_ || RM == Reloc::Default)
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EFlags |= ELF::EF_MIPS_PIC;
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else if (RM == Reloc::Static)
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; // Do nothing for Reloc::Static
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else
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llvm_unreachable("Unsupported relocation model for e_flags");
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MCA.setELFHeaderEFlags(EFlags);
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}
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// For llc. Set a symbol's STO flags
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void
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MipsELFStreamer::emitMipsSTOCG(const MipsSubtarget &Subtarget,
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MCSymbol *Sym,
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unsigned Val) {
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if (hasRawTextSupport())
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return;
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MCSymbolData &Data = getOrCreateSymbolData(Sym);
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// The "other" values are stored in the last 6 bits of the second byte
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// The traditional defines for STO values assume the full byte and thus
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// the shift to pack it.
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MCELF::setOther(Data, Val >> 2);
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}
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} // namespace llvm
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