1 files changed, 0 insertions, 268 deletions
diff --git a/lib/MC/MCAnalysis/MCObjectSymbolizer.cpp b/lib/MC/MCAnalysis/MCObjectSymbolizer.cpp
deleted file mode 100644
index b149596..0000000
--- a/lib/MC/MCAnalysis/MCObjectSymbolizer.cpp
+++ /dev/null
@@ -1,268 +0,0 @@
-//===-- lib/MC/MCObjectSymbolizer.cpp -------------------------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/MC/MCObjectSymbolizer.h"
-#include "llvm/ADT/SmallString.h"
-#include "llvm/MC/MCContext.h"
-#include "llvm/MC/MCExpr.h"
-#include "llvm/MC/MCInst.h"
-#include "llvm/MC/MCRelocationInfo.h"
-#include "llvm/MC/MCSymbol.h"
-#include "llvm/Object/ELFObjectFile.h"
-#include "llvm/Object/MachO.h"
-#include "llvm/Support/raw_ostream.h"
-#include <algorithm>
-
-using namespace llvm;
-using namespace object;
-
-//===- MCMachObjectSymbolizer ---------------------------------------------===//
-
-namespace {
-class MCMachObjectSymbolizer : public MCObjectSymbolizer {
-  const MachOObjectFile *MOOF;
-  // __TEXT;__stubs support.
-  uint64_t StubsStart;
-  uint64_t StubsCount;
-  uint64_t StubSize;
-  uint64_t StubsIndSymIndex;
-
-public:
-  MCMachObjectSymbolizer(MCContext &Ctx,
-                         std::unique_ptr<MCRelocationInfo> RelInfo,
-                         const MachOObjectFile *MOOF);
-
-  StringRef findExternalFunctionAt(uint64_t Addr) override;
-
-  void tryAddingPcLoadReferenceComment(raw_ostream &cStream, int64_t Value,
-                                       uint64_t Address) override;
-};
-} // End unnamed namespace
-
-MCMachObjectSymbolizer::MCMachObjectSymbolizer(
-    MCContext &Ctx, std::unique_ptr<MCRelocationInfo> RelInfo,
-    const MachOObjectFile *MOOF)
-  : MCObjectSymbolizer(Ctx, std::move(RelInfo), MOOF), MOOF(MOOF),
-    StubsStart(0), StubsCount(0), StubSize(0), StubsIndSymIndex(0) {
-
-  for (const SectionRef &Section : MOOF->sections()) {
-    StringRef Name;
-    Section.getName(Name);
-    if (Name == "__stubs") {
-      SectionRef StubsSec = Section;
-      if (MOOF->is64Bit()) {
-        MachO::section_64 S = MOOF->getSection64(StubsSec.getRawDataRefImpl());
-        StubsIndSymIndex = S.reserved1;
-        StubSize = S.reserved2;
-      } else {
-        MachO::section S = MOOF->getSection(StubsSec.getRawDataRefImpl());
-        StubsIndSymIndex = S.reserved1;
-        StubSize = S.reserved2;
-      }
-      assert(StubSize && "Mach-O stub entry size can't be zero!");
-      StubsSec.getAddress(StubsStart);
-      StubsSec.getSize(StubsCount);
-      StubsCount /= StubSize;
-    }
-  }
-}
-
-StringRef MCMachObjectSymbolizer::findExternalFunctionAt(uint64_t Addr) {
-  // FIXME: also, this can all be done at the very beginning, by iterating over
-  // all stubs and creating the calls to outside functions. Is it worth it
-  // though?
-  if (!StubSize)
-    return StringRef();
-  uint64_t StubIdx = (Addr - StubsStart) / StubSize;
-  if (StubIdx >= StubsCount)
-    return StringRef();
-
-  uint32_t SymtabIdx =
-    MOOF->getIndirectSymbolTableEntry(MOOF->getDysymtabLoadCommand(), StubIdx);
-
-  StringRef SymName;
-  symbol_iterator SI = MOOF->symbol_begin();
-  for (uint32_t i = 0; i != SymtabIdx; ++i)
-    ++SI;
-  SI->getName(SymName);
-  assert(SI != MOOF->symbol_end() && "Stub wasn't found in the symbol table!");
-  assert(SymName.front() == '_' && "Mach-O symbol doesn't start with '_'!");
-  return SymName.substr(1);
-}
-
-void MCMachObjectSymbolizer::
-tryAddingPcLoadReferenceComment(raw_ostream &cStream, int64_t Value,
-                                uint64_t Address) {
-  if (const RelocationRef *R = findRelocationAt(Address)) {
-    const MCExpr *RelExpr = RelInfo->createExprForRelocation(*R);
-    if (!RelExpr || RelExpr->EvaluateAsAbsolute(Value) == false)
-      return;
-  }
-  uint64_t Addr = Value;
-  if (const SectionRef *S = findSectionContaining(Addr)) {
-    StringRef Name; S->getName(Name);
-    uint64_t SAddr; S->getAddress(SAddr);
-    if (Name == "__cstring") {
-      StringRef Contents;
-      S->getContents(Contents);
-      Contents = Contents.substr(Addr - SAddr);
-      cStream << " ## literal pool for: "
-              << Contents.substr(0, Contents.find_first_of(0));
-    }
-  }
-}
-
-//===- MCObjectSymbolizer -------------------------------------------------===//
-
-MCObjectSymbolizer::MCObjectSymbolizer(
-  MCContext &Ctx, std::unique_ptr<MCRelocationInfo> RelInfo,
-  const ObjectFile *Obj)
-  : MCSymbolizer(Ctx, std::move(RelInfo)), Obj(Obj), SortedSections(),
-    AddrToReloc() {}
-
-bool MCObjectSymbolizer::
-tryAddingSymbolicOperand(MCInst &MI, raw_ostream &cStream,
-                         int64_t Value, uint64_t Address, bool IsBranch,
-                         uint64_t Offset, uint64_t InstSize) {
-  if (IsBranch) {
-    StringRef ExtFnName = findExternalFunctionAt((uint64_t)Value);
-    if (!ExtFnName.empty()) {
-      MCSymbol *Sym = Ctx.GetOrCreateSymbol(ExtFnName);
-      const MCExpr *Expr = MCSymbolRefExpr::Create(Sym, Ctx);
-      MI.addOperand(MCOperand::CreateExpr(Expr));
-      return true;
-    }
-  }
-
-  if (const RelocationRef *R = findRelocationAt(Address + Offset)) {
-    if (const MCExpr *RelExpr = RelInfo->createExprForRelocation(*R)) {
-      MI.addOperand(MCOperand::CreateExpr(RelExpr));
-      return true;
-    }
-    // Only try to create a symbol+offset expression if there is no relocation.
-    return false;
-  }
-
-  // Interpret Value as a branch target.
-  if (IsBranch == false)
-    return false;
-  uint64_t UValue = Value;
-  // FIXME: map instead of looping each time?
-  for (const SymbolRef &Symbol : Obj->symbols()) {
-    uint64_t SymAddr;
-    Symbol.getAddress(SymAddr);
-    uint64_t SymSize;
-    Symbol.getSize(SymSize);
-    StringRef SymName;
-    Symbol.getName(SymName);
-    SymbolRef::Type SymType;
-    Symbol.getType(SymType);
-    if (SymAddr == UnknownAddressOrSize || SymSize == UnknownAddressOrSize ||
-        SymName.empty() || SymType != SymbolRef::ST_Function)
-      continue;
-
-    if ( SymAddr == UValue ||
-        (SymAddr <= UValue && SymAddr + SymSize > UValue)) {
-      MCSymbol *Sym = Ctx.GetOrCreateSymbol(SymName);
-      const MCExpr *Expr = MCSymbolRefExpr::Create(Sym, Ctx);
-      if (SymAddr != UValue) {
-        const MCExpr *Off = MCConstantExpr::Create(UValue - SymAddr, Ctx);
-        Expr = MCBinaryExpr::CreateAdd(Expr, Off, Ctx);
-      }
-      MI.addOperand(MCOperand::CreateExpr(Expr));
-      return true;
-    }
-  }
-  return false;
-}
-
-void MCObjectSymbolizer::
-tryAddingPcLoadReferenceComment(raw_ostream &cStream,
-                                int64_t Value, uint64_t Address) {
-}
-
-StringRef MCObjectSymbolizer::findExternalFunctionAt(uint64_t Addr) {
-  return StringRef();
-}
-
-MCObjectSymbolizer *MCObjectSymbolizer::createObjectSymbolizer(
-    MCContext &Ctx, std::unique_ptr<MCRelocationInfo> RelInfo,
-    const ObjectFile *Obj) {
-  if (const MachOObjectFile *MOOF = dyn_cast<MachOObjectFile>(Obj))
-    return new MCMachObjectSymbolizer(Ctx, std::move(RelInfo), MOOF);
-  return new MCObjectSymbolizer(Ctx, std::move(RelInfo), Obj);
-}
-
-// SortedSections implementation.
-
-static bool SectionStartsBefore(const SectionRef &S, uint64_t Addr) {
-  uint64_t SAddr; S.getAddress(SAddr);
-  return SAddr < Addr;
-}
-
-const SectionRef *MCObjectSymbolizer::findSectionContaining(uint64_t Addr) {
-  if (SortedSections.empty())
-    buildSectionList();
-
-  SortedSectionList::iterator
-    EndIt = SortedSections.end(),
-    It = std::lower_bound(SortedSections.begin(), EndIt,
-                          Addr, SectionStartsBefore);
-  if (It == EndIt)
-    return nullptr;
-  uint64_t SAddr; It->getAddress(SAddr);
-  uint64_t SSize; It->getSize(SSize);
-  if (Addr >= SAddr + SSize)
-    return nullptr;
-  return &*It;
-}
-
-const RelocationRef *MCObjectSymbolizer::findRelocationAt(uint64_t Addr) {
-  if (AddrToReloc.empty())
-    buildRelocationByAddrMap();
-
-  AddrToRelocMap::const_iterator RI = AddrToReloc.find(Addr);
-  if (RI == AddrToReloc.end())
-    return nullptr;
-  return &RI->second;
-}
-
-void MCObjectSymbolizer::buildSectionList() {
-  for (const SectionRef &Section : Obj->sections()) {
-    bool RequiredForExec;
-    Section.isRequiredForExecution(RequiredForExec);
-    if (RequiredForExec == false)
-      continue;
-    uint64_t SAddr;
-    Section.getAddress(SAddr);
-    uint64_t SSize;
-    Section.getSize(SSize);
-    SortedSectionList::iterator It =
-        std::lower_bound(SortedSections.begin(), SortedSections.end(), SAddr,
-                         SectionStartsBefore);
-    if (It != SortedSections.end()) {
-      uint64_t FoundSAddr; It->getAddress(FoundSAddr);
-      if (FoundSAddr < SAddr + SSize)
-        llvm_unreachable("Inserting overlapping sections");
-    }
-    SortedSections.insert(It, Section);
-  }
-}
-
-void MCObjectSymbolizer::buildRelocationByAddrMap() {
-  for (const SectionRef &Section : Obj->sections()) {
-    for (const RelocationRef &Reloc : Section.relocations()) {
-      uint64_t Address;
-      Reloc.getAddress(Address);
-      // At a specific address, only keep the first relocation.
-      if (AddrToReloc.find(Address) == AddrToReloc.end())
-        AddrToReloc[Address] = Reloc;
-    }
-  }
-}