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[llvm-objdump] Print out xcoff load section of xcoff object file with option private-headers (#121226)
[llvm-objdump] Print out xcoff load section of xcoff object file with option private-headers
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‎llvm/test/tools/llvm-objdump/XCOFF/private-headers-option.test

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## Test the --private-headers option for the loader section of XCOFF object files.
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# RUN: yaml2obj --docnum=1 %s -o %t_xcoff32.o
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# RUN: yaml2obj --docnum=2 %s -o %t_xcoff64.o
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# RUN: llvm-objdump --private-headers %t_xcoff32.o |\
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# RUN: FileCheck %s --check-prefixes=CHECK32 --match-full-lines
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# RUN: llvm-objdump --private-headers %t_xcoff64.o |\
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# RUN: FileCheck %s --check-prefixes=CHECK64 --match-full-lines
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# RUN: yaml2obj --docnum=1 %s -o %t-truncate.o
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# RUN: %python -c "with open('%/t-truncate.o', 'r+b') as input: input.truncate(60)"
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# RUN: llvm-objdump --private-headers %t-truncate.o 2>&1 |\
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# RUN: FileCheck --check-prefix=WARN %s
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# WARN: The end of the file was unexpectedly encountered: loader section with offset 0x3c and size 0x20 goes past the end of the file
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--- !XCOFF
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FileHeader:
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MagicNumber: 0x1DF
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Sections:
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- Name: .loader
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Flags: [ STYP_LOADER ]
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SectionData: "0000000100000003000000050000016D00000001000000A40000001800000211"
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## ^------- -Version=1
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## ^------- -NumberOfSymbolEntries=3
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## ^------- -NumberOfRelocationEntries=5
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## ^------- -LengthOfImportFileIDStringTable=365
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## ^------- -NumberOfImportFileIDs=1
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## ^------- -OffsetToImportFileIDs=0xA4
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## ^------- -LengthOfStringTable=24
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## ^------- -OffsetToStringTable=0x211
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--- !XCOFF
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FileHeader:
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MagicNumber: 0x1F7
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Sections:
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- Name: .loader
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Flags: [ STYP_LOADER ]
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SectionData: "0000000200000003000000050000016D000000010000002300000000000000D0000000000000023D00000000000000380000000000000080"
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## ^------- -Version=2
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## ^------- -NumberOfSymbolEntries=3
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## ^------- -NumberOfRelocationEntries=5
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## ^------- -LengthOfImportFileIDStringTable=365
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## ^------- -NumberOfImportFileIDs=1
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## ^------- --LengthOfStringTable=0x23
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## ^--------------- -OffsetToImportFileIDs=0xD0
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## ^--------------- -OffsetToStringTable=0x23D
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## ^-------------- -OffsetToSymbolTable=0x38
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## ^--------------- -OffsetToRelocationEntries=0x80
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# CHECK32: ---File Header:
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# CHECK32-NEXT: Magic: 0x1df
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# CHECK32-NEXT: NumberOfSections: 1
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# CHECK32-NEXT: Timestamp: None (0)
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# CHECK32-NEXT: SymbolTableOffset: 0x0
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# CHECK32-NEXT: SymbolTableEntries: 0
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# CHECK32-NEXT: OptionalHeaderSize: 0x0
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# CHECK32-NEXT: Flags: 0x0
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# CHECK32: ---Loader Section Header:
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# CHECK32-NEXT: Version: 1
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# CHECK32-NEXT: NumberOfSymbolEntries: 3
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# CHECK32-NEXT: NumberOfRelocationEntries: 5
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# CHECK32-NEXT: LengthOfImportFileIDStringTable: 365
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# CHECK32-NEXT: NumberOfImportFileIDs: 1
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# CHECK32-NEXT: OffsetToImportFileIDs: 0xa4
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# CHECK32-NEXT: LengthOfStringTable: 24
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# CHECK32-NEXT: OffsetToStringTable: 0x211
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# CHECK64: ---File Header:
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# CHECK64-NEXT: Magic: 0x1f7
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# CHECK64-NEXT: NumberOfSections: 1
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# CHECK64-NEXT: Timestamp: None (0)
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# CHECK64-NEXT: SymbolTableOffset: 0x0
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# CHECK64-NEXT: SymbolTableEntries: 0
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# CHECK64-NEXT: OptionalHeaderSize: 0x0
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# CHECK64-NEXT: Flags: 0x0
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# CHECK64: ---Loader Section Header:
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# CHECK64-NEXT: Version: 2
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# CHECK64-NEXT: NumberOfSymbolEntries: 3
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# CHECK64-NEXT: NumberOfRelocationEntries: 5
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# CHECK64-NEXT: LengthOfImportFileIDStringTable: 365
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# CHECK64-NEXT: NumberOfImportFileIDs: 1
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# CHECK64-NEXT: OffsetToImportFileIDs: 0xd0
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# CHECK64-NEXT: LengthOfStringTable: 35
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# CHECK64-NEXT: OffsetToStringTable: 0x23d
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# CHECK64-NEXT: OffsetToSymbolTable 0x38
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# CHECK64-NEXT: OffsetToRelocationEntries 0x80

‎llvm/tools/llvm-objdump/XCOFFDump.cpp

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@@ -42,6 +42,7 @@ class XCOFFDumper : public objdump::Dumper {
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void printPrivateHeaders() override;
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void printFileHeader();
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void printAuxiliaryHeader();
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void printLoaderSectionHeader();
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void printAuxiliaryHeader(const XCOFFAuxiliaryHeader32 *AuxHeader);
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void printAuxiliaryHeader(const XCOFFAuxiliaryHeader64 *AuxHeader);
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template <typename AuxHeaderMemberType, typename XCOFFAuxiliaryHeader>
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void XCOFFDumper::printPrivateHeaders() {
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printFileHeader();
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printAuxiliaryHeader();
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printLoaderSectionHeader();
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}
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FormattedString XCOFFDumper::formatName(StringRef Name) {
@@ -262,6 +264,45 @@ void XCOFFDumper::printAuxiliaryHeader(
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AuxSize, *AuxHeader);
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}
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void XCOFFDumper::printLoaderSectionHeader() {
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Expected<uintptr_t> LoaderSectionAddrOrError =
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Obj.getSectionFileOffsetToRawData(XCOFF::STYP_LOADER);
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if (!LoaderSectionAddrOrError) {
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reportUniqueWarning(LoaderSectionAddrOrError.takeError());
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return;
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}
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uintptr_t LoaderSectionAddr = LoaderSectionAddrOrError.get();
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if (LoaderSectionAddr == 0)
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return;
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auto PrintLoadSecHeaderCommon = [&](const auto *LDHeader) {
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printNumber("Version:", LDHeader->Version);
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printNumber("NumberOfSymbolEntries:", LDHeader->NumberOfSymTabEnt);
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printNumber("NumberOfRelocationEntries:", LDHeader->NumberOfRelTabEnt);
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printNumber("LengthOfImportFileIDStringTable:",
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LDHeader->LengthOfImpidStrTbl);
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printNumber("NumberOfImportFileIDs:", LDHeader->NumberOfImpid);
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printHex("OffsetToImportFileIDs:", LDHeader->OffsetToImpid);
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printNumber("LengthOfStringTable:", LDHeader->LengthOfStrTbl);
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printHex("OffsetToStringTable:", LDHeader->OffsetToStrTbl);
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};
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Width = 35;
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outs() << "\n---Loader Section Header:\n";
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if (Obj.is64Bit()) {
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const LoaderSectionHeader64 *LoaderSec64 =
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reinterpret_cast<const LoaderSectionHeader64 *>(LoaderSectionAddr);
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PrintLoadSecHeaderCommon(LoaderSec64);
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printHex("OffsetToSymbolTable", LoaderSec64->OffsetToSymTbl);
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printHex("OffsetToRelocationEntries", LoaderSec64->OffsetToRelEnt);
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} else {
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const LoaderSectionHeader32 *LoaderSec32 =
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reinterpret_cast<const LoaderSectionHeader32 *>(LoaderSectionAddr);
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PrintLoadSecHeaderCommon(LoaderSec32);
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}
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}
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void XCOFFDumper::printFileHeader() {
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Width = 20;
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outs() << "\n---File Header:\n";

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