2946cd7010
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
140 lines
6.1 KiB
C++
140 lines
6.1 KiB
C++
//===-- SparcELFObjectWriter.cpp - Sparc ELF Writer -----------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "MCTargetDesc/SparcFixupKinds.h"
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#include "MCTargetDesc/SparcMCExpr.h"
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#include "MCTargetDesc/SparcMCTargetDesc.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/MC/MCELFObjectWriter.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCObjectWriter.h"
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#include "llvm/MC/MCValue.h"
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#include "llvm/Support/ErrorHandling.h"
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using namespace llvm;
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namespace {
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class SparcELFObjectWriter : public MCELFObjectTargetWriter {
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public:
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SparcELFObjectWriter(bool Is64Bit, uint8_t OSABI)
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: MCELFObjectTargetWriter(Is64Bit, OSABI,
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Is64Bit ? ELF::EM_SPARCV9 : ELF::EM_SPARC,
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/*HasRelocationAddend*/ true) {}
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~SparcELFObjectWriter() override {}
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protected:
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unsigned getRelocType(MCContext &Ctx, const MCValue &Target,
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const MCFixup &Fixup, bool IsPCRel) const override;
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bool needsRelocateWithSymbol(const MCSymbol &Sym,
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unsigned Type) const override;
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};
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}
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unsigned SparcELFObjectWriter::getRelocType(MCContext &Ctx,
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const MCValue &Target,
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const MCFixup &Fixup,
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bool IsPCRel) const {
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if (const SparcMCExpr *SExpr = dyn_cast<SparcMCExpr>(Fixup.getValue())) {
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if (SExpr->getKind() == SparcMCExpr::VK_Sparc_R_DISP32)
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return ELF::R_SPARC_DISP32;
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}
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if (IsPCRel) {
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switch((unsigned)Fixup.getKind()) {
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default:
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llvm_unreachable("Unimplemented fixup -> relocation");
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case FK_Data_1: return ELF::R_SPARC_DISP8;
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case FK_Data_2: return ELF::R_SPARC_DISP16;
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case FK_Data_4: return ELF::R_SPARC_DISP32;
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case FK_Data_8: return ELF::R_SPARC_DISP64;
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case Sparc::fixup_sparc_call30: return ELF::R_SPARC_WDISP30;
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case Sparc::fixup_sparc_br22: return ELF::R_SPARC_WDISP22;
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case Sparc::fixup_sparc_br19: return ELF::R_SPARC_WDISP19;
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case Sparc::fixup_sparc_pc22: return ELF::R_SPARC_PC22;
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case Sparc::fixup_sparc_pc10: return ELF::R_SPARC_PC10;
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case Sparc::fixup_sparc_wplt30: return ELF::R_SPARC_WPLT30;
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}
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}
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switch((unsigned)Fixup.getKind()) {
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default:
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llvm_unreachable("Unimplemented fixup -> relocation");
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case FK_Data_1: return ELF::R_SPARC_8;
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case FK_Data_2: return ((Fixup.getOffset() % 2)
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? ELF::R_SPARC_UA16
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: ELF::R_SPARC_16);
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case FK_Data_4: return ((Fixup.getOffset() % 4)
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? ELF::R_SPARC_UA32
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: ELF::R_SPARC_32);
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case FK_Data_8: return ((Fixup.getOffset() % 8)
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? ELF::R_SPARC_UA64
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: ELF::R_SPARC_64);
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case Sparc::fixup_sparc_13: return ELF::R_SPARC_13;
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case Sparc::fixup_sparc_hi22: return ELF::R_SPARC_HI22;
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case Sparc::fixup_sparc_lo10: return ELF::R_SPARC_LO10;
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case Sparc::fixup_sparc_h44: return ELF::R_SPARC_H44;
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case Sparc::fixup_sparc_m44: return ELF::R_SPARC_M44;
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case Sparc::fixup_sparc_l44: return ELF::R_SPARC_L44;
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case Sparc::fixup_sparc_hh: return ELF::R_SPARC_HH22;
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case Sparc::fixup_sparc_hm: return ELF::R_SPARC_HM10;
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case Sparc::fixup_sparc_got22: return ELF::R_SPARC_GOT22;
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case Sparc::fixup_sparc_got10: return ELF::R_SPARC_GOT10;
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case Sparc::fixup_sparc_got13: return ELF::R_SPARC_GOT13;
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case Sparc::fixup_sparc_tls_gd_hi22: return ELF::R_SPARC_TLS_GD_HI22;
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case Sparc::fixup_sparc_tls_gd_lo10: return ELF::R_SPARC_TLS_GD_LO10;
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case Sparc::fixup_sparc_tls_gd_add: return ELF::R_SPARC_TLS_GD_ADD;
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case Sparc::fixup_sparc_tls_gd_call: return ELF::R_SPARC_TLS_GD_CALL;
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case Sparc::fixup_sparc_tls_ldm_hi22: return ELF::R_SPARC_TLS_LDM_HI22;
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case Sparc::fixup_sparc_tls_ldm_lo10: return ELF::R_SPARC_TLS_LDM_LO10;
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case Sparc::fixup_sparc_tls_ldm_add: return ELF::R_SPARC_TLS_LDM_ADD;
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case Sparc::fixup_sparc_tls_ldm_call: return ELF::R_SPARC_TLS_LDM_CALL;
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case Sparc::fixup_sparc_tls_ldo_hix22: return ELF::R_SPARC_TLS_LDO_HIX22;
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case Sparc::fixup_sparc_tls_ldo_lox10: return ELF::R_SPARC_TLS_LDO_LOX10;
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case Sparc::fixup_sparc_tls_ldo_add: return ELF::R_SPARC_TLS_LDO_ADD;
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case Sparc::fixup_sparc_tls_ie_hi22: return ELF::R_SPARC_TLS_IE_HI22;
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case Sparc::fixup_sparc_tls_ie_lo10: return ELF::R_SPARC_TLS_IE_LO10;
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case Sparc::fixup_sparc_tls_ie_ld: return ELF::R_SPARC_TLS_IE_LD;
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case Sparc::fixup_sparc_tls_ie_ldx: return ELF::R_SPARC_TLS_IE_LDX;
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case Sparc::fixup_sparc_tls_ie_add: return ELF::R_SPARC_TLS_IE_ADD;
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case Sparc::fixup_sparc_tls_le_hix22: return ELF::R_SPARC_TLS_LE_HIX22;
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case Sparc::fixup_sparc_tls_le_lox10: return ELF::R_SPARC_TLS_LE_LOX10;
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}
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return ELF::R_SPARC_NONE;
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}
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bool SparcELFObjectWriter::needsRelocateWithSymbol(const MCSymbol &Sym,
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unsigned Type) const {
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switch (Type) {
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default:
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return false;
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// All relocations that use a GOT need a symbol, not an offset, as
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// the offset of the symbol within the section is irrelevant to
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// where the GOT entry is. Don't need to list all the TLS entries,
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// as they're all marked as requiring a symbol anyways.
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case ELF::R_SPARC_GOT10:
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case ELF::R_SPARC_GOT13:
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case ELF::R_SPARC_GOT22:
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case ELF::R_SPARC_GOTDATA_HIX22:
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case ELF::R_SPARC_GOTDATA_LOX10:
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case ELF::R_SPARC_GOTDATA_OP_HIX22:
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case ELF::R_SPARC_GOTDATA_OP_LOX10:
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return true;
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}
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}
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std::unique_ptr<MCObjectTargetWriter>
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llvm::createSparcELFObjectWriter(bool Is64Bit, uint8_t OSABI) {
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return llvm::make_unique<SparcELFObjectWriter>(Is64Bit, OSABI);
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}
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