136 lines
4.3 KiB
C++
136 lines
4.3 KiB
C++
//===-- VEELFObjectWriter.cpp - VE ELF Writer -----------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "VEFixupKinds.h"
|
|
#include "VEMCExpr.h"
|
|
#include "VEMCTargetDesc.h"
|
|
#include "llvm/MC/MCELFObjectWriter.h"
|
|
#include "llvm/MC/MCExpr.h"
|
|
#include "llvm/MC/MCObjectWriter.h"
|
|
#include "llvm/MC/MCValue.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
|
|
using namespace llvm;
|
|
|
|
namespace {
|
|
class VEELFObjectWriter : public MCELFObjectTargetWriter {
|
|
public:
|
|
VEELFObjectWriter(uint8_t OSABI)
|
|
: MCELFObjectTargetWriter(/* Is64Bit */ true, OSABI, ELF::EM_VE,
|
|
/* HasRelocationAddend */ true) {}
|
|
|
|
~VEELFObjectWriter() override {}
|
|
|
|
protected:
|
|
unsigned getRelocType(MCContext &Ctx, const MCValue &Target,
|
|
const MCFixup &Fixup, bool IsPCRel) const override;
|
|
|
|
bool needsRelocateWithSymbol(const MCSymbol &Sym,
|
|
unsigned Type) const override;
|
|
};
|
|
} // namespace
|
|
|
|
unsigned VEELFObjectWriter::getRelocType(MCContext &Ctx, const MCValue &Target,
|
|
const MCFixup &Fixup,
|
|
bool IsPCRel) const {
|
|
if (const VEMCExpr *SExpr = dyn_cast<VEMCExpr>(Fixup.getValue())) {
|
|
if (SExpr->getKind() == VEMCExpr::VK_VE_PC_LO32)
|
|
return ELF::R_VE_PC_LO32;
|
|
}
|
|
|
|
if (IsPCRel) {
|
|
switch (Fixup.getTargetKind()) {
|
|
default:
|
|
llvm_unreachable("Unimplemented fixup -> relocation");
|
|
case FK_PCRel_1:
|
|
llvm_unreachable("Unimplemented fixup fk_data_1 -> relocation");
|
|
case FK_PCRel_2:
|
|
llvm_unreachable("Unimplemented fixup fk_data_2 -> relocation");
|
|
// FIXME: relative kind?
|
|
case FK_PCRel_4:
|
|
return ELF::R_VE_REFLONG;
|
|
case FK_PCRel_8:
|
|
return ELF::R_VE_REFQUAD;
|
|
case VE::fixup_ve_pc_hi32:
|
|
return ELF::R_VE_PC_HI32;
|
|
case VE::fixup_ve_pc_lo32:
|
|
return ELF::R_VE_PC_LO32;
|
|
}
|
|
}
|
|
|
|
switch (Fixup.getTargetKind()) {
|
|
default:
|
|
llvm_unreachable("Unimplemented fixup -> relocation");
|
|
case FK_Data_1:
|
|
llvm_unreachable("Unimplemented fixup fk_data_1 -> relocation");
|
|
case FK_Data_2:
|
|
llvm_unreachable("Unimplemented fixup fk_data_2 -> relocation");
|
|
case FK_Data_4:
|
|
return ELF::R_VE_REFLONG;
|
|
case FK_Data_8:
|
|
return ELF::R_VE_REFQUAD;
|
|
case VE::fixup_ve_reflong:
|
|
return ELF::R_VE_REFLONG;
|
|
case VE::fixup_ve_hi32:
|
|
return ELF::R_VE_HI32;
|
|
case VE::fixup_ve_lo32:
|
|
return ELF::R_VE_LO32;
|
|
case VE::fixup_ve_pc_hi32:
|
|
llvm_unreachable("Unimplemented fixup pc_hi32 -> relocation");
|
|
case VE::fixup_ve_pc_lo32:
|
|
llvm_unreachable("Unimplemented fixup pc_lo32 -> relocation");
|
|
case VE::fixup_ve_got_hi32:
|
|
return ELF::R_VE_GOT_HI32;
|
|
case VE::fixup_ve_got_lo32:
|
|
return ELF::R_VE_GOT_LO32;
|
|
case VE::fixup_ve_gotoff_hi32:
|
|
return ELF::R_VE_GOTOFF_HI32;
|
|
case VE::fixup_ve_gotoff_lo32:
|
|
return ELF::R_VE_GOTOFF_LO32;
|
|
case VE::fixup_ve_plt_hi32:
|
|
return ELF::R_VE_PLT_HI32;
|
|
case VE::fixup_ve_plt_lo32:
|
|
return ELF::R_VE_PLT_LO32;
|
|
case VE::fixup_ve_tls_gd_hi32:
|
|
return ELF::R_VE_TLS_GD_HI32;
|
|
case VE::fixup_ve_tls_gd_lo32:
|
|
return ELF::R_VE_TLS_GD_LO32;
|
|
case VE::fixup_ve_tpoff_hi32:
|
|
return ELF::R_VE_TPOFF_HI32;
|
|
case VE::fixup_ve_tpoff_lo32:
|
|
return ELF::R_VE_TPOFF_LO32;
|
|
}
|
|
|
|
return ELF::R_VE_NONE;
|
|
}
|
|
|
|
bool VEELFObjectWriter::needsRelocateWithSymbol(const MCSymbol &Sym,
|
|
unsigned Type) const {
|
|
switch (Type) {
|
|
default:
|
|
return false;
|
|
|
|
// All relocations that use a GOT need a symbol, not an offset, as
|
|
// the offset of the symbol within the section is irrelevant to
|
|
// where the GOT entry is. Don't need to list all the TLS entries,
|
|
// as they're all marked as requiring a symbol anyways.
|
|
case ELF::R_VE_GOT_HI32:
|
|
case ELF::R_VE_GOT_LO32:
|
|
case ELF::R_VE_GOTOFF_HI32:
|
|
case ELF::R_VE_GOTOFF_LO32:
|
|
case ELF::R_VE_TLS_GD_HI32:
|
|
case ELF::R_VE_TLS_GD_LO32:
|
|
return true;
|
|
}
|
|
}
|
|
|
|
std::unique_ptr<MCObjectTargetWriter>
|
|
llvm::createVEELFObjectWriter(uint8_t OSABI) {
|
|
return std::make_unique<VEELFObjectWriter>(OSABI);
|
|
}
|