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Imported Upstream version 5.18.0.167

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Former-commit-id: 289509151e0fee68a1b591a20c9f109c3c789d3a
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Xamarin Public Jenkins (auto-signing)
2018-10-20 08:25:10 +00:00
parent e19d552987
commit b084638f15
28489 changed files with 184 additions and 3866856 deletions
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168
external/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZMCObjectWriter.cpp vendored
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@ -1,168 +0,0 @@
//===-- SystemZMCObjectWriter.cpp - SystemZ ELF writer --------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "MCTargetDesc/SystemZMCFixups.h"
#include "MCTargetDesc/SystemZMCTargetDesc.h"
#include "llvm/BinaryFormat/ELF.h"
#include "llvm/MC/MCELFObjectWriter.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCFixup.h"
#include "llvm/MC/MCObjectWriter.h"
#include "llvm/MC/MCValue.h"
#include "llvm/Support/ErrorHandling.h"
#include <cassert>
#include <cstdint>
using namespace llvm;
namespace {
class SystemZObjectWriter : public MCELFObjectTargetWriter {
public:
SystemZObjectWriter(uint8_t OSABI);
~SystemZObjectWriter() override = default;
protected:
// Override MCELFObjectTargetWriter.
unsigned getRelocType(MCContext &Ctx, const MCValue &Target,
const MCFixup &Fixup, bool IsPCRel) const override;
};
} // end anonymous namespace
SystemZObjectWriter::SystemZObjectWriter(uint8_t OSABI)
: MCELFObjectTargetWriter(/*Is64Bit=*/true, OSABI, ELF::EM_S390,
/*HasRelocationAddend=*/ true) {}
// Return the relocation type for an absolute value of MCFixupKind Kind.
static unsigned getAbsoluteReloc(unsigned Kind) {
switch (Kind) {
case FK_Data_1: return ELF::R_390_8;
case FK_Data_2: return ELF::R_390_16;
case FK_Data_4: return ELF::R_390_32;
case FK_Data_8: return ELF::R_390_64;
}
llvm_unreachable("Unsupported absolute address");
}
// Return the relocation type for a PC-relative value of MCFixupKind Kind.
static unsigned getPCRelReloc(unsigned Kind) {
switch (Kind) {
case FK_Data_2: return ELF::R_390_PC16;
case FK_Data_4: return ELF::R_390_PC32;
case FK_Data_8: return ELF::R_390_PC64;
case SystemZ::FK_390_PC12DBL: return ELF::R_390_PC12DBL;
case SystemZ::FK_390_PC16DBL: return ELF::R_390_PC16DBL;
case SystemZ::FK_390_PC24DBL: return ELF::R_390_PC24DBL;
case SystemZ::FK_390_PC32DBL: return ELF::R_390_PC32DBL;
}
llvm_unreachable("Unsupported PC-relative address");
}
// Return the R_390_TLS_LE* relocation type for MCFixupKind Kind.
static unsigned getTLSLEReloc(unsigned Kind) {
switch (Kind) {
case FK_Data_4: return ELF::R_390_TLS_LE32;
case FK_Data_8: return ELF::R_390_TLS_LE64;
}
llvm_unreachable("Unsupported absolute address");
}
// Return the R_390_TLS_LDO* relocation type for MCFixupKind Kind.
static unsigned getTLSLDOReloc(unsigned Kind) {
switch (Kind) {
case FK_Data_4: return ELF::R_390_TLS_LDO32;
case FK_Data_8: return ELF::R_390_TLS_LDO64;
}
llvm_unreachable("Unsupported absolute address");
}
// Return the R_390_TLS_LDM* relocation type for MCFixupKind Kind.
static unsigned getTLSLDMReloc(unsigned Kind) {
switch (Kind) {
case FK_Data_4: return ELF::R_390_TLS_LDM32;
case FK_Data_8: return ELF::R_390_TLS_LDM64;
case SystemZ::FK_390_TLS_CALL: return ELF::R_390_TLS_LDCALL;
}
llvm_unreachable("Unsupported absolute address");
}
// Return the R_390_TLS_GD* relocation type for MCFixupKind Kind.
static unsigned getTLSGDReloc(unsigned Kind) {
switch (Kind) {
case FK_Data_4: return ELF::R_390_TLS_GD32;
case FK_Data_8: return ELF::R_390_TLS_GD64;
case SystemZ::FK_390_TLS_CALL: return ELF::R_390_TLS_GDCALL;
}
llvm_unreachable("Unsupported absolute address");
}
// Return the PLT relocation counterpart of MCFixupKind Kind.
static unsigned getPLTReloc(unsigned Kind) {
switch (Kind) {
case SystemZ::FK_390_PC12DBL: return ELF::R_390_PLT12DBL;
case SystemZ::FK_390_PC16DBL: return ELF::R_390_PLT16DBL;
case SystemZ::FK_390_PC24DBL: return ELF::R_390_PLT24DBL;
case SystemZ::FK_390_PC32DBL: return ELF::R_390_PLT32DBL;
}
llvm_unreachable("Unsupported absolute address");
}
unsigned SystemZObjectWriter::getRelocType(MCContext &Ctx,
const MCValue &Target,
const MCFixup &Fixup,
bool IsPCRel) const {
MCSymbolRefExpr::VariantKind Modifier = Target.getAccessVariant();
unsigned Kind = Fixup.getKind();
switch (Modifier) {
case MCSymbolRefExpr::VK_None:
if (IsPCRel)
return getPCRelReloc(Kind);
return getAbsoluteReloc(Kind);
case MCSymbolRefExpr::VK_NTPOFF:
assert(!IsPCRel && "NTPOFF shouldn't be PC-relative");
return getTLSLEReloc(Kind);
case MCSymbolRefExpr::VK_INDNTPOFF:
if (IsPCRel && Kind == SystemZ::FK_390_PC32DBL)
return ELF::R_390_TLS_IEENT;
llvm_unreachable("Only PC-relative INDNTPOFF accesses are supported for now");
case MCSymbolRefExpr::VK_DTPOFF:
assert(!IsPCRel && "DTPOFF shouldn't be PC-relative");
return getTLSLDOReloc(Kind);
case MCSymbolRefExpr::VK_TLSLDM:
assert(!IsPCRel && "TLSLDM shouldn't be PC-relative");
return getTLSLDMReloc(Kind);
case MCSymbolRefExpr::VK_TLSGD:
assert(!IsPCRel && "TLSGD shouldn't be PC-relative");
return getTLSGDReloc(Kind);
case MCSymbolRefExpr::VK_GOT:
if (IsPCRel && Kind == SystemZ::FK_390_PC32DBL)
return ELF::R_390_GOTENT;
llvm_unreachable("Only PC-relative GOT accesses are supported for now");
case MCSymbolRefExpr::VK_PLT:
assert(IsPCRel && "@PLT shouldt be PC-relative");
return getPLTReloc(Kind);
default:
llvm_unreachable("Modifier not supported");
}
}
std::unique_ptr<MCObjectWriter>
llvm::createSystemZObjectWriter(raw_pwrite_stream &OS, uint8_t OSABI) {
return createELFObjectWriter(llvm::make_unique<SystemZObjectWriter>(OSABI),
OS, /*IsLittleEndian=*/false);
}