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