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

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[llvm-objdump] Print out xcoff load section of xcoff object file with
option private-headers
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zhijian lin 2025-01-20 09:35:01 -05:00 committed by GitHub
parent 9cf24652e7
commit b92cc78060
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2 changed files with 131 additions and 0 deletions
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90
llvm/test/tools/llvm-objdump/XCOFF/private-headers-option.test Normal file
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@ -0,0 +1,90 @@
## Test the --private-headers option for the loader section of XCOFF object files.
# RUN: yaml2obj --docnum=1 %s -o %t_xcoff32.o
# RUN: yaml2obj --docnum=2 %s -o %t_xcoff64.o
# RUN: llvm-objdump --private-headers %t_xcoff32.o |\
# RUN: FileCheck %s --check-prefixes=CHECK32 --match-full-lines
# RUN: llvm-objdump --private-headers %t_xcoff64.o |\
# RUN: FileCheck %s --check-prefixes=CHECK64 --match-full-lines
# RUN: yaml2obj --docnum=1 %s -o %t-truncate.o
# RUN: %python -c "with open('%/t-truncate.o', 'r+b') as input: input.truncate(60)"
# RUN: llvm-objdump --private-headers %t-truncate.o 2>&1 |\
# RUN: FileCheck --check-prefix=WARN %s
# WARN: The end of the file was unexpectedly encountered: loader section with offset 0x3c and size 0x20 goes past the end of the file
--- !XCOFF
FileHeader:
MagicNumber: 0x1DF
Sections:
- Name: .loader
Flags: [ STYP_LOADER ]
SectionData: "0000000100000003000000050000016D00000001000000A40000001800000211"
## ^------- -Version=1
## ^------- -NumberOfSymbolEntries=3
## ^------- -NumberOfRelocationEntries=5
## ^------- -LengthOfImportFileIDStringTable=365
## ^------- -NumberOfImportFileIDs=1
## ^------- -OffsetToImportFileIDs=0xA4
## ^------- -LengthOfStringTable=24
## ^------- -OffsetToStringTable=0x211
--- !XCOFF
FileHeader:
MagicNumber: 0x1F7
Sections:
- Name: .loader
Flags: [ STYP_LOADER ]
SectionData: "0000000200000003000000050000016D000000010000002300000000000000D0000000000000023D00000000000000380000000000000080"
## ^------- -Version=2
## ^------- -NumberOfSymbolEntries=3
## ^------- -NumberOfRelocationEntries=5
## ^------- -LengthOfImportFileIDStringTable=365
## ^------- -NumberOfImportFileIDs=1
## ^------- --LengthOfStringTable=0x23
## ^--------------- -OffsetToImportFileIDs=0xD0
## ^--------------- -OffsetToStringTable=0x23D
## ^-------------- -OffsetToSymbolTable=0x38
## ^--------------- -OffsetToRelocationEntries=0x80
# CHECK32: ---File Header:
# CHECK32-NEXT: Magic: 0x1df
# CHECK32-NEXT: NumberOfSections: 1
# CHECK32-NEXT: Timestamp: None (0)
# CHECK32-NEXT: SymbolTableOffset: 0x0
# CHECK32-NEXT: SymbolTableEntries: 0
# CHECK32-NEXT: OptionalHeaderSize: 0x0
# CHECK32-NEXT: Flags: 0x0
# CHECK32: ---Loader Section Header:
# CHECK32-NEXT: Version: 1
# CHECK32-NEXT: NumberOfSymbolEntries: 3
# CHECK32-NEXT: NumberOfRelocationEntries: 5
# CHECK32-NEXT: LengthOfImportFileIDStringTable: 365
# CHECK32-NEXT: NumberOfImportFileIDs: 1
# CHECK32-NEXT: OffsetToImportFileIDs: 0xa4
# CHECK32-NEXT: LengthOfStringTable: 24
# CHECK32-NEXT: OffsetToStringTable: 0x211
# CHECK64: ---File Header:
# CHECK64-NEXT: Magic: 0x1f7
# CHECK64-NEXT: NumberOfSections: 1
# CHECK64-NEXT: Timestamp: None (0)
# CHECK64-NEXT: SymbolTableOffset: 0x0
# CHECK64-NEXT: SymbolTableEntries: 0
# CHECK64-NEXT: OptionalHeaderSize: 0x0
# CHECK64-NEXT: Flags: 0x0
# CHECK64: ---Loader Section Header:
# CHECK64-NEXT: Version: 2
# CHECK64-NEXT: NumberOfSymbolEntries: 3
# CHECK64-NEXT: NumberOfRelocationEntries: 5
# CHECK64-NEXT: LengthOfImportFileIDStringTable: 365
# CHECK64-NEXT: NumberOfImportFileIDs: 1
# CHECK64-NEXT: OffsetToImportFileIDs: 0xd0
# CHECK64-NEXT: LengthOfStringTable: 35
# CHECK64-NEXT: OffsetToStringTable: 0x23d
# CHECK64-NEXT: OffsetToSymbolTable 0x38
# CHECK64-NEXT: OffsetToRelocationEntries 0x80

41
llvm/tools/llvm-objdump/XCOFFDump.cpp
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@ -42,6 +42,7 @@ private:
void printPrivateHeaders() override;
void printFileHeader();
void printAuxiliaryHeader();
void printLoaderSectionHeader();
void printAuxiliaryHeader(const XCOFFAuxiliaryHeader32 *AuxHeader);
void printAuxiliaryHeader(const XCOFFAuxiliaryHeader64 *AuxHeader);
template <typename AuxHeaderMemberType, typename XCOFFAuxiliaryHeader>
@ -66,6 +67,7 @@ private:
void XCOFFDumper::printPrivateHeaders() {
printFileHeader();
printAuxiliaryHeader();
printLoaderSectionHeader();
}
FormattedString XCOFFDumper::formatName(StringRef Name) {
@ -262,6 +264,45 @@ void XCOFFDumper::printAuxiliaryHeader(
AuxSize, *AuxHeader);
}
void XCOFFDumper::printLoaderSectionHeader() {
Expected<uintptr_t> LoaderSectionAddrOrError =
Obj.getSectionFileOffsetToRawData(XCOFF::STYP_LOADER);
if (!LoaderSectionAddrOrError) {
reportUniqueWarning(LoaderSectionAddrOrError.takeError());
return;
}
uintptr_t LoaderSectionAddr = LoaderSectionAddrOrError.get();
if (LoaderSectionAddr == 0)
return;
auto PrintLoadSecHeaderCommon = [&](const auto *LDHeader) {
printNumber("Version:", LDHeader->Version);
printNumber("NumberOfSymbolEntries:", LDHeader->NumberOfSymTabEnt);
printNumber("NumberOfRelocationEntries:", LDHeader->NumberOfRelTabEnt);
printNumber("LengthOfImportFileIDStringTable:",
LDHeader->LengthOfImpidStrTbl);
printNumber("NumberOfImportFileIDs:", LDHeader->NumberOfImpid);
printHex("OffsetToImportFileIDs:", LDHeader->OffsetToImpid);
printNumber("LengthOfStringTable:", LDHeader->LengthOfStrTbl);
printHex("OffsetToStringTable:", LDHeader->OffsetToStrTbl);
};
Width = 35;
outs() << "\n---Loader Section Header:\n";
if (Obj.is64Bit()) {
const LoaderSectionHeader64 *LoaderSec64 =
reinterpret_cast<const LoaderSectionHeader64 *>(LoaderSectionAddr);
PrintLoadSecHeaderCommon(LoaderSec64);
printHex("OffsetToSymbolTable", LoaderSec64->OffsetToSymTbl);
printHex("OffsetToRelocationEntries", LoaderSec64->OffsetToRelEnt);
} else {
const LoaderSectionHeader32 *LoaderSec32 =
reinterpret_cast<const LoaderSectionHeader32 *>(LoaderSectionAddr);
PrintLoadSecHeaderCommon(LoaderSec32);
}
}
void XCOFFDumper::printFileHeader() {
Width = 20;
outs() << "\n---File Header:\n";