1 //===- AArch64CA53Erratum843419Stub.cpp -----------------------------------===// 2 // 3 // The MCLinker Project 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "AArch64CA53Erratum843419Stub.h" 11 #include "AArch64InsnHelpers.h" 12 13 #include "mcld/Fragment/FragmentRef.h" 14 #include "mcld/Fragment/Relocation.h" 15 #include "mcld/IRBuilder.h" 16 #include "mcld/LD/BranchIsland.h" 17 #include "mcld/LD/LDSection.h" 18 #include "mcld/LD/LDSymbol.h" 19 #include "mcld/LD/ResolveInfo.h" 20 #include "mcld/LD/SectionData.h" 21 22 #include <llvm/ADT/StringExtras.h> 23 #include <llvm/Support/ELF.h> 24 25 #include <cassert> 26 27 namespace mcld { 28 29 //===----------------------------------------------------------------------===// 30 // AArch64CA53Erratum843419Stub 31 //===----------------------------------------------------------------------===// 32 AArch64CA53Erratum843419Stub::AArch64CA53Erratum843419Stub() { 33 } 34 35 /// for doClone 36 AArch64CA53Erratum843419Stub::AArch64CA53Erratum843419Stub( 37 const uint32_t* pData, 38 size_t pSize, 39 const char* pName, 40 const_fixup_iterator pBegin, 41 const_fixup_iterator pEnd) 42 : AArch64CA53ErratumStub(pData, pSize, pName, pBegin, pEnd) { 43 } 44 45 AArch64CA53Erratum843419Stub::~AArch64CA53Erratum843419Stub() { 46 } 47 48 bool AArch64CA53Erratum843419Stub::isErratum843419Sequence(unsigned insn1, 49 unsigned insn2, 50 unsigned insn3) { 51 unsigned rt; 52 unsigned rt2; 53 bool is_pair; 54 bool is_load; 55 return AArch64InsnHelpers::isMemOp(insn2, rt, rt2, is_pair, is_load) && 56 (!is_pair || (is_pair && !is_load)) && 57 AArch64InsnHelpers::isLDSTUIMM(insn3) && 58 (AArch64InsnHelpers::getRn(insn3) == AArch64InsnHelpers::getRd(insn1)); 59 } 60 61 bool AArch64CA53Erratum843419Stub::isMyDuty(const FragmentRef& pFragRef) const { 62 if ((pFragRef.offset() + AArch64InsnHelpers::InsnSize * 3) > 63 pFragRef.frag()->size()) { 64 return false; 65 } 66 67 // The first instruction must be ending at 0xFF8 or 0xFFC. 68 const uint64_t vma = pFragRef.frag()->getParent()->getSection().addr() + 69 pFragRef.getOutputOffset(); 70 const unsigned page_offset = (vma & 0xFFF); 71 if ((page_offset != 0xFF8) && (page_offset != 0xFFC)) { 72 return false; 73 } 74 75 ErratumSequence code; 76 pFragRef.memcpy(&code, AArch64InsnHelpers::InsnSize * 3, 0); 77 78 if (isErratum843419Sequence(code.insns[0], code.insns[1], code.insns[2])) { 79 return true; 80 } 81 82 return false; 83 } 84 85 Stub* AArch64CA53Erratum843419Stub::doClone() { 86 return new AArch64CA53Erratum843419Stub(getData(), 87 size(), 88 "erratum_843419_veneer", 89 fixup_begin(), 90 fixup_end()); 91 } 92 93 } // namespace mcld 94
