| //===- AArch64CA53Erratum843419Stub.cpp -----------------------------------===// |
| // |
| // The MCLinker Project |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "AArch64CA53Erratum843419Stub.h" |
| #include "AArch64InsnHelpers.h" |
| |
| #include "mcld/Fragment/FragmentRef.h" |
| #include "mcld/Fragment/Relocation.h" |
| #include "mcld/IRBuilder.h" |
| #include "mcld/LD/BranchIsland.h" |
| #include "mcld/LD/LDSection.h" |
| #include "mcld/LD/LDSymbol.h" |
| #include "mcld/LD/ResolveInfo.h" |
| #include "mcld/LD/SectionData.h" |
| |
| #include <llvm/ADT/StringExtras.h> |
| #include <llvm/Support/ELF.h> |
| |
| #include <cassert> |
| |
| namespace mcld { |
| |
| //===----------------------------------------------------------------------===// |
| // AArch64CA53Erratum843419Stub |
| //===----------------------------------------------------------------------===// |
| AArch64CA53Erratum843419Stub::AArch64CA53Erratum843419Stub() { |
| } |
| |
| /// for doClone |
| AArch64CA53Erratum843419Stub::AArch64CA53Erratum843419Stub( |
| const uint32_t* pData, |
| size_t pSize, |
| const char* pName, |
| const_fixup_iterator pBegin, |
| const_fixup_iterator pEnd) |
| : AArch64CA53ErratumStub(pData, pSize, pName, pBegin, pEnd) { |
| } |
| |
| AArch64CA53Erratum843419Stub::~AArch64CA53Erratum843419Stub() { |
| } |
| |
| bool AArch64CA53Erratum843419Stub::isErratum843419Sequence(unsigned insn1, |
| unsigned insn2, |
| unsigned insn3) { |
| unsigned rt; |
| unsigned rt2; |
| bool is_pair; |
| bool is_load; |
| return AArch64InsnHelpers::isMemOp(insn2, rt, rt2, is_pair, is_load) && |
| (!is_pair || (is_pair && !is_load)) && |
| AArch64InsnHelpers::isLDSTUIMM(insn3) && |
| (AArch64InsnHelpers::getRn(insn3) == AArch64InsnHelpers::getRd(insn1)); |
| } |
| |
| bool AArch64CA53Erratum843419Stub::isMyDuty(const FragmentRef& pFragRef) const { |
| if ((pFragRef.offset() + AArch64InsnHelpers::InsnSize * 3) > |
| pFragRef.frag()->size()) { |
| return false; |
| } |
| |
| // The first instruction must be ending at 0xFF8 or 0xFFC. |
| const uint64_t vma = pFragRef.frag()->getParent()->getSection().addr() + |
| pFragRef.getOutputOffset(); |
| const unsigned page_offset = (vma & 0xFFF); |
| if ((page_offset != 0xFF8) && (page_offset != 0xFFC)) { |
| return false; |
| } |
| |
| ErratumSequence code; |
| pFragRef.memcpy(&code, AArch64InsnHelpers::InsnSize * 3, 0); |
| |
| if (isErratum843419Sequence(code.insns[0], code.insns[1], code.insns[2])) { |
| return true; |
| } |
| |
| return false; |
| } |
| |
| Stub* AArch64CA53Erratum843419Stub::doClone() { |
| return new AArch64CA53Erratum843419Stub(getData(), |
| size(), |
| "erratum_843419_veneer", |
| fixup_begin(), |
| fixup_end()); |
| } |
| |
| } // namespace mcld |
