This patch adds a new flag "-coff-imports" to llvm-readobj.
When the flag is given, the command prints out the COFF import table. Currently only the import table directory will be printed. I'm going to make another patch to print out the imported symbols. The implementation of import directory entry iterator in COFFObjectFile.cpp was buggy. This patch fixes that too. http://reviews.llvm.org/D5569 llvm-svn: 218891
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@ -651,6 +651,8 @@ public:
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bool operator==(const ImportDirectoryEntryRef &Other) const;
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void moveNext();
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std::error_code getName(StringRef &Result) const;
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std::error_code getImportLookupTableRVA(uint32_t &Result) const;
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std::error_code getImportAddressTableRVA(uint32_t &Result) const;
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std::error_code
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getImportTableEntry(const import_directory_table_entry *&Result) const;
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@ -491,8 +491,9 @@ std::error_code COFFObjectFile::initImportTablePtr() {
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return object_error::success;
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uint32_t ImportTableRva = DataEntry->RelativeVirtualAddress;
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// -1 because the last entry is the null entry.
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NumberOfImportDirectory = DataEntry->Size /
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sizeof(import_directory_table_entry);
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sizeof(import_directory_table_entry) - 1;
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// Find the section that contains the RVA. This is needed because the RVA is
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// the import table's memory address which is different from its file offset.
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@ -1029,24 +1030,36 @@ void ImportDirectoryEntryRef::moveNext() {
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std::error_code ImportDirectoryEntryRef::getImportTableEntry(
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const import_directory_table_entry *&Result) const {
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Result = ImportTable;
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Result = ImportTable + Index;
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return object_error::success;
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}
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std::error_code ImportDirectoryEntryRef::getName(StringRef &Result) const {
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uintptr_t IntPtr = 0;
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if (std::error_code EC =
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OwningObject->getRvaPtr(ImportTable->NameRVA, IntPtr))
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OwningObject->getRvaPtr(ImportTable[Index].NameRVA, IntPtr))
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return EC;
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Result = StringRef(reinterpret_cast<const char *>(IntPtr));
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return object_error::success;
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}
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std::error_code
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ImportDirectoryEntryRef::getImportLookupTableRVA(uint32_t &Result) const {
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Result = ImportTable[Index].ImportLookupTableRVA;
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return object_error::success;
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}
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std::error_code
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ImportDirectoryEntryRef::getImportAddressTableRVA(uint32_t &Result) const {
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Result = ImportTable[Index].ImportAddressTableRVA;
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return object_error::success;
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}
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std::error_code ImportDirectoryEntryRef::getImportLookupEntry(
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const import_lookup_table_entry32 *&Result) const {
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uintptr_t IntPtr = 0;
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if (std::error_code EC =
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OwningObject->getRvaPtr(ImportTable->ImportLookupTableRVA, IntPtr))
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uint32_t RVA = ImportTable[Index].ImportLookupTableRVA;
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if (std::error_code EC = OwningObject->getRvaPtr(RVA, IntPtr))
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return EC;
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Result = reinterpret_cast<const import_lookup_table_entry32 *>(IntPtr);
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return object_error::success;
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Binary file not shown.
Binary file not shown.
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@ -0,0 +1,24 @@
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RUN: llvm-readobj --coff-imports %p/Inputs/imports.exe.coff-i386 | FileCheck -check-prefix=X86 %s
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RUN: llvm-readobj --coff-imports %p/Inputs/imports.exe.coff-x86-64 | FileCheck -check-prefix=X64 %s
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X86: Import {
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X86-NEXT: Name: KERNEL32.dll
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X86-NEXT: ImportLookupTableRVA: 0x204C
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X86-NEXT: ImportAddressTableRVA: 0x2000
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X86-NEXT: }
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X86-NEXT: Import {
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X86-NEXT: Name: USER32.dll
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X86-NEXT: ImportLookupTableRVA: 0x2054
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X86-NEXT: ImportAddressTableRVA: 0x2008
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X86-NEXT: }
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X64: Import {
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X64-NEXT: Name: KERNEL32.dll
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X64-NEXT: ImportLookupTableRVA: 0x2060
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X64-NEXT: ImportAddressTableRVA: 0x2000
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X64-NEXT: }
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X64-NEXT: Import {
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X64-NEXT: Name: USER32.dll
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X64-NEXT: ImportLookupTableRVA: 0x2070
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X64-NEXT: ImportAddressTableRVA: 0x2010
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X64-NEXT: }
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@ -55,6 +55,7 @@ public:
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void printSymbols() override;
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void printDynamicSymbols() override;
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void printUnwindInfo() override;
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void printCOFFImports() override;
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private:
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void printSymbol(const SymbolRef &Sym);
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@ -882,3 +883,17 @@ void COFFDumper::printUnwindInfo() {
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}
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}
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void COFFDumper::printCOFFImports() {
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for (auto I = Obj->import_directory_begin(), E = Obj->import_directory_end();
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I != E; ++I) {
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DictScope Import(W, "Import");
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StringRef Name;
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if (error(I->getName(Name))) return;
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W.printString("Name", Name);
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uint32_t Addr;
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if (error(I->getImportLookupTableRVA(Addr))) return;
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W.printHex("ImportLookupTableRVA", Addr);
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if (error(I->getImportAddressTableRVA(Addr))) return;
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W.printHex("ImportAddressTableRVA", Addr);
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}
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}
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@ -43,6 +43,9 @@ public:
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// Only implemented for MIPS ELF at this time.
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virtual void printMipsPLTGOT() { }
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// Only implemented for PE/COFF.
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virtual void printCOFFImports() { }
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protected:
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StreamWriter& W;
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};
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@ -141,6 +141,10 @@ namespace opts {
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cl::opt<bool>
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MipsPLTGOT("mips-plt-got",
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cl::desc("Display the MIPS GOT and PLT GOT sections"));
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// -coff-imports
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cl::opt<bool>
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COFFImports("coff-imports", cl::desc("Display the PE/COFF import table"));
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} // namespace opts
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static int ReturnValue = EXIT_SUCCESS;
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@ -266,6 +270,8 @@ static void dumpObject(const ObjectFile *Obj) {
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if (isMipsArch(Obj->getArch()) && Obj->isELF())
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if (opts::MipsPLTGOT)
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Dumper->printMipsPLTGOT();
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if (opts::COFFImports)
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Dumper->printCOFFImports();
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}
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