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-rw-r--r--tools/llvm-readobj/COFFDumper.cpp464
1 files changed, 53 insertions, 411 deletions
diff --git a/tools/llvm-readobj/COFFDumper.cpp b/tools/llvm-readobj/COFFDumper.cpp
index cd40da7..91f2a57 100644
--- a/tools/llvm-readobj/COFFDumper.cpp
+++ b/tools/llvm-readobj/COFFDumper.cpp
@@ -16,6 +16,7 @@
#include "Error.h"
#include "ObjDumper.h"
#include "StreamWriter.h"
+#include "Win64EHDumper.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/Object/COFF.h"
@@ -58,45 +59,24 @@ private:
void printSymbol(const SymbolRef &Sym);
void printRelocation(const SectionRef &Section, const RelocationRef &Reloc);
void printDataDirectory(uint32_t Index, const std::string &FieldName);
- void printX64UnwindInfo();
template <class PEHeader> void printPEHeader(const PEHeader *Hdr);
void printBaseOfDataField(const pe32_header *Hdr);
void printBaseOfDataField(const pe32plus_header *Hdr);
- void printRuntimeFunction(
- const RuntimeFunction& RTF,
- uint64_t OffsetInSection,
- const std::vector<RelocationRef> &Rels);
-
- void printUnwindInfo(
- const Win64EH::UnwindInfo& UI,
- uint64_t OffsetInSection,
- const std::vector<RelocationRef> &Rels);
-
- void printUnwindCode(const Win64EH::UnwindInfo &UI, ArrayRef<UnwindCode> UCs);
-
void printCodeViewLineTables(const SectionRef &Section);
void cacheRelocations();
- error_code getSectionContents(
- const std::vector<RelocationRef> &Rels,
- uint64_t Offset,
- ArrayRef<uint8_t> &Contents,
- uint64_t &Addr);
-
- error_code getSection(
- const std::vector<RelocationRef> &Rels,
- uint64_t Offset,
- const coff_section **Section,
- uint64_t *AddrPtr);
+ error_code resolveSymbol(const coff_section *Section, uint64_t Offset,
+ SymbolRef &Sym);
+ error_code resolveSymbolName(const coff_section *Section, uint64_t Offset,
+ StringRef &Name);
typedef DenseMap<const coff_section*, std::vector<RelocationRef> > RelocMapTy;
const llvm::object::COFFObjectFile *Obj;
RelocMapTy RelocMap;
- std::vector<RelocationRef> EmptyRelocs;
};
} // namespace
@@ -116,110 +96,33 @@ error_code createCOFFDumper(const object::ObjectFile *Obj, StreamWriter &Writer,
} // namespace llvm
-
-// Returns the name of the unwind code.
-static StringRef getUnwindCodeTypeName(uint8_t Code) {
- switch(Code) {
- default: llvm_unreachable("Invalid unwind code");
- case UOP_PushNonVol: return "PUSH_NONVOL";
- case UOP_AllocLarge: return "ALLOC_LARGE";
- case UOP_AllocSmall: return "ALLOC_SMALL";
- case UOP_SetFPReg: return "SET_FPREG";
- case UOP_SaveNonVol: return "SAVE_NONVOL";
- case UOP_SaveNonVolBig: return "SAVE_NONVOL_FAR";
- case UOP_SaveXMM128: return "SAVE_XMM128";
- case UOP_SaveXMM128Big: return "SAVE_XMM128_FAR";
- case UOP_PushMachFrame: return "PUSH_MACHFRAME";
- }
-}
-
-// Returns the name of a referenced register.
-static StringRef getUnwindRegisterName(uint8_t Reg) {
- switch(Reg) {
- default: llvm_unreachable("Invalid register");
- case 0: return "RAX";
- case 1: return "RCX";
- case 2: return "RDX";
- case 3: return "RBX";
- case 4: return "RSP";
- case 5: return "RBP";
- case 6: return "RSI";
- case 7: return "RDI";
- case 8: return "R8";
- case 9: return "R9";
- case 10: return "R10";
- case 11: return "R11";
- case 12: return "R12";
- case 13: return "R13";
- case 14: return "R14";
- case 15: return "R15";
- }
-}
-
-// Calculates the number of array slots required for the unwind code.
-static unsigned getNumUsedSlots(const UnwindCode &UnwindCode) {
- switch (UnwindCode.getUnwindOp()) {
- default: llvm_unreachable("Invalid unwind code");
- case UOP_PushNonVol:
- case UOP_AllocSmall:
- case UOP_SetFPReg:
- case UOP_PushMachFrame:
- return 1;
- case UOP_SaveNonVol:
- case UOP_SaveXMM128:
- return 2;
- case UOP_SaveNonVolBig:
- case UOP_SaveXMM128Big:
- return 3;
- case UOP_AllocLarge:
- return (UnwindCode.getOpInfo() == 0) ? 2 : 3;
- }
-}
-
-// Given a symbol sym this functions returns the address and section of it.
-static error_code resolveSectionAndAddress(const COFFObjectFile *Obj,
- const SymbolRef &Sym,
- const coff_section *&ResolvedSection,
- uint64_t &ResolvedAddr) {
- if (error_code EC = Sym.getAddress(ResolvedAddr))
- return EC;
-
- section_iterator iter(Obj->section_begin());
- if (error_code EC = Sym.getSection(iter))
- return EC;
-
- ResolvedSection = Obj->getCOFFSection(*iter);
- return object_error::success;
-}
-
-// Given a vector of relocations for a section and an offset into this section
-// the function returns the symbol used for the relocation at the offset.
-static error_code resolveSymbol(const std::vector<RelocationRef> &Rels,
- uint64_t Offset, SymbolRef &Sym) {
- for (std::vector<RelocationRef>::const_iterator RelI = Rels.begin(),
- RelE = Rels.end();
- RelI != RelE; ++RelI) {
- uint64_t Ofs;
- if (error_code EC = RelI->getOffset(Ofs))
+// Given a a section and an offset into this section the function returns the
+// symbol used for the relocation at the offset.
+error_code COFFDumper::resolveSymbol(const coff_section *Section,
+ uint64_t Offset, SymbolRef &Sym) {
+ const auto &Relocations = RelocMap[Section];
+ for (const auto &Relocation : Relocations) {
+ uint64_t RelocationOffset;
+ if (error_code EC = Relocation.getOffset(RelocationOffset))
return EC;
- if (Ofs == Offset) {
- Sym = *RelI->getSymbol();
+ if (RelocationOffset == Offset) {
+ Sym = *Relocation.getSymbol();
return readobj_error::success;
}
}
-
return readobj_error::unknown_symbol;
}
-// Given a vector of relocations for a section and an offset into this section
-// the function returns the name of the symbol used for the relocation at the
-// offset.
-static error_code resolveSymbolName(const std::vector<RelocationRef> &Rels,
- uint64_t Offset, StringRef &Name) {
- SymbolRef Sym;
- if (error_code EC = resolveSymbol(Rels, Offset, Sym)) return EC;
- if (error_code EC = Sym.getName(Name)) return EC;
+// Given a section and an offset into this section the function returns the name
+// of the symbol used for the relocation at the offset.
+error_code COFFDumper::resolveSymbolName(const coff_section *Section,
+ uint64_t Offset, StringRef &Name) {
+ SymbolRef Symbol;
+ if (error_code EC = resolveSymbol(Section, Offset, Symbol))
+ return EC;
+ if (error_code EC = Symbol.getName(Name))
+ return EC;
return object_error::success;
}
@@ -403,50 +306,6 @@ WeakExternalCharacteristics[] = {
{ "Alias" , COFF::IMAGE_WEAK_EXTERN_SEARCH_ALIAS }
};
-static const EnumEntry<unsigned> UnwindFlags[] = {
- { "ExceptionHandler", Win64EH::UNW_ExceptionHandler },
- { "TerminateHandler", Win64EH::UNW_TerminateHandler },
- { "ChainInfo" , Win64EH::UNW_ChainInfo }
-};
-
-static const EnumEntry<unsigned> UnwindOpInfo[] = {
- { "RAX", 0 },
- { "RCX", 1 },
- { "RDX", 2 },
- { "RBX", 3 },
- { "RSP", 4 },
- { "RBP", 5 },
- { "RSI", 6 },
- { "RDI", 7 },
- { "R8", 8 },
- { "R9", 9 },
- { "R10", 10 },
- { "R11", 11 },
- { "R12", 12 },
- { "R13", 13 },
- { "R14", 14 },
- { "R15", 15 }
-};
-
-// Some additional COFF structures not defined by llvm::object.
-namespace {
- struct coff_aux_file_record {
- char FileName[18];
- };
-} // namespace
-
-static uint64_t getOffsetOfLSDA(const Win64EH::UnwindInfo& UI) {
- return static_cast<const char*>(UI.getLanguageSpecificData())
- - reinterpret_cast<const char*>(&UI);
-}
-
-static uint32_t getLargeSlotValue(ArrayRef<UnwindCode> UCs) {
- if (UCs.size() < 3)
- return 0;
-
- return UCs[1].FrameOffset + (static_cast<uint32_t>(UCs[2].FrameOffset) << 16);
-}
-
template<typename T>
static error_code getSymbolAuxData(const COFFObjectFile *Obj,
const coff_symbol *Symbol, const T* &Aux) {
@@ -455,69 +314,6 @@ static error_code getSymbolAuxData(const COFFObjectFile *Obj,
return readobj_error::success;
}
-static std::string formatSymbol(const std::vector<RelocationRef> &Rels,
- uint64_t Offset, uint32_t Disp) {
- std::string Buffer;
- raw_string_ostream Str(Buffer);
-
- StringRef Sym;
- if (resolveSymbolName(Rels, Offset, Sym)) {
- Str << format(" (0x%" PRIX64 ")", Offset);
- return Str.str();
- }
-
- Str << Sym;
- if (Disp > 0) {
- Str << format(" +0x%X (0x%" PRIX64 ")", Disp, Offset);
- } else {
- Str << format(" (0x%" PRIX64 ")", Offset);
- }
-
- return Str.str();
-}
-
-// Given a vector of relocations for a section and an offset into this section
-// the function resolves the symbol used for the relocation at the offset and
-// returns the section content and the address inside the content pointed to
-// by the symbol.
-error_code COFFDumper::getSectionContents(
- const std::vector<RelocationRef> &Rels, uint64_t Offset,
- ArrayRef<uint8_t> &Contents, uint64_t &Addr) {
-
- SymbolRef Sym;
- const coff_section *Section;
-
- if (error_code EC = resolveSymbol(Rels, Offset, Sym))
- return EC;
- if (error_code EC = resolveSectionAndAddress(Obj, Sym, Section, Addr))
- return EC;
- if (error_code EC = Obj->getSectionContents(Section, Contents))
- return EC;
-
- return object_error::success;
-}
-
-error_code COFFDumper::getSection(
- const std::vector<RelocationRef> &Rels, uint64_t Offset,
- const coff_section **SectionPtr, uint64_t *AddrPtr) {
-
- SymbolRef Sym;
- if (error_code EC = resolveSymbol(Rels, Offset, Sym))
- return EC;
-
- const coff_section *Section;
- uint64_t Addr;
- if (error_code EC = resolveSectionAndAddress(Obj, Sym, Section, Addr))
- return EC;
-
- if (SectionPtr)
- *SectionPtr = Section;
- if (AddrPtr)
- *AddrPtr = Addr;
-
- return object_error::success;
-}
-
void COFFDumper::cacheRelocations() {
for (const SectionRef &S : Obj->sections()) {
const coff_section *Section = Obj->getCOFFSection(S);
@@ -541,7 +337,7 @@ void COFFDumper::printDataDirectory(uint32_t Index, const std::string &FieldName
void COFFDumper::printFileHeaders() {
// Print COFF header
- const coff_file_header *COFFHeader = 0;
+ const coff_file_header *COFFHeader = nullptr;
if (error(Obj->getCOFFHeader(COFFHeader)))
return;
@@ -564,13 +360,13 @@ void COFFDumper::printFileHeaders() {
// Print PE header. This header does not exist if this is an object file and
// not an executable.
- const pe32_header *PEHeader = 0;
+ const pe32_header *PEHeader = nullptr;
if (error(Obj->getPE32Header(PEHeader)))
return;
if (PEHeader)
printPEHeader<pe32_header>(PEHeader);
- const pe32plus_header *PEPlusHeader = 0;
+ const pe32plus_header *PEPlusHeader = nullptr;
if (error(Obj->getPE32PlusHeader(PEPlusHeader)))
return;
if (PEPlusHeader)
@@ -685,8 +481,8 @@ void COFFDumper::printCodeViewLineTables(const SectionRef &Section) {
}
StringRef FunctionName;
- if (error(resolveSymbolName(RelocMap[Obj->getCOFFSection(Section)],
- Offset, FunctionName)))
+ if (error(resolveSymbolName(Obj->getCOFFSection(Section), Offset,
+ FunctionName)))
return;
W.printString("FunctionName", FunctionName);
if (FunctionLineTables.count(FunctionName) != 0) {
@@ -700,7 +496,7 @@ void COFFDumper::printCodeViewLineTables(const SectionRef &Section) {
break;
}
case COFF::DEBUG_STRING_TABLE_SUBSECTION:
- if (PayloadSize == 0 || StringTable.data() != 0 ||
+ if (PayloadSize == 0 || StringTable.data() != nullptr ||
Contents.back() != '\0') {
// Empty or duplicate or non-null-terminated subsection.
error(object_error::parse_failed);
@@ -712,7 +508,8 @@ void COFFDumper::printCodeViewLineTables(const SectionRef &Section) {
// Holds the translation table from file indices
// to offsets in the string table.
- if (PayloadSize == 0 || FileIndexToStringOffsetTable.data() != 0) {
+ if (PayloadSize == 0 ||
+ FileIndexToStringOffsetTable.data() != nullptr) {
// Empty or duplicate subsection.
error(object_error::parse_failed);
return;
@@ -979,13 +776,16 @@ void COFFDumper::printSymbol(const SymbolRef &Sym) {
W.printBinary("Unused", makeArrayRef(Aux->Unused));
} else if (Symbol->isFileRecord()) {
- const coff_aux_file_record *Aux;
+ const coff_aux_file *Aux;
if (error(getSymbolAuxData(Obj, Symbol + I, Aux)))
break;
DictScope AS(W, "AuxFileRecord");
- W.printString("FileName", StringRef(Aux->FileName));
+ StringRef Name(Aux->FileName,
+ Symbol->NumberOfAuxSymbols * COFF::SymbolSize);
+ W.printString("FileName", Name.rtrim(StringRef("\0", 1)));
+ break;
} else if (Symbol->isSectionDefinition()) {
const coff_aux_section_definition *Aux;
if (error(getSymbolAuxData(Obj, Symbol + I, Aux)))
@@ -1045,181 +845,23 @@ void COFFDumper::printUnwindInfo() {
return;
ListScope D(W, "UnwindInformation");
- if (Header->Machine != COFF::IMAGE_FILE_MACHINE_AMD64) {
- W.startLine() << "Unsupported image machine type "
- "(currently only AMD64 is supported).\n";
- return;
- }
-
- printX64UnwindInfo();
-}
-
-void COFFDumper::printX64UnwindInfo() {
- for (const SectionRef &Section : Obj->sections()) {
- StringRef Name;
- if (error(Section.getName(Name)))
- continue;
- if (Name != ".pdata" && !Name.startswith(".pdata$"))
- continue;
-
- const coff_section *PData = Obj->getCOFFSection(Section);
-
- ArrayRef<uint8_t> Contents;
- if (error(Obj->getSectionContents(PData, Contents)) || Contents.empty())
- continue;
-
- ArrayRef<RuntimeFunction> RFs(
- reinterpret_cast<const RuntimeFunction *>(Contents.data()),
- Contents.size() / sizeof(RuntimeFunction));
-
- for (const RuntimeFunction *I = RFs.begin(), *E = RFs.end(); I < E; ++I) {
- const uint64_t OffsetInSection = std::distance(RFs.begin(), I)
- * sizeof(RuntimeFunction);
-
- printRuntimeFunction(*I, OffsetInSection, RelocMap[PData]);
- }
- }
-}
-
-void COFFDumper::printRuntimeFunction(
- const RuntimeFunction& RTF,
- uint64_t OffsetInSection,
- const std::vector<RelocationRef> &Rels) {
-
- DictScope D(W, "RuntimeFunction");
- W.printString("StartAddress",
- formatSymbol(Rels, OffsetInSection + 0, RTF.StartAddress));
- W.printString("EndAddress",
- formatSymbol(Rels, OffsetInSection + 4, RTF.EndAddress));
- W.printString("UnwindInfoAddress",
- formatSymbol(Rels, OffsetInSection + 8, RTF.UnwindInfoOffset));
-
- const coff_section* XData = 0;
- uint64_t UnwindInfoOffset = 0;
- if (error(getSection(Rels, OffsetInSection + 8, &XData, &UnwindInfoOffset)))
- return;
-
- ArrayRef<uint8_t> XContents;
- if (error(Obj->getSectionContents(XData, XContents)) || XContents.empty())
- return;
-
- UnwindInfoOffset += RTF.UnwindInfoOffset;
- if (UnwindInfoOffset > XContents.size())
- return;
-
- const Win64EH::UnwindInfo *UI =
- reinterpret_cast<const Win64EH::UnwindInfo *>(
- XContents.data() + UnwindInfoOffset);
-
- printUnwindInfo(*UI, UnwindInfoOffset, RelocMap[XData]);
-}
-
-void COFFDumper::printUnwindInfo(
- const Win64EH::UnwindInfo& UI,
- uint64_t OffsetInSection,
- const std::vector<RelocationRef> &Rels) {
- DictScope D(W, "UnwindInfo");
- W.printNumber("Version", UI.getVersion());
- W.printFlags("Flags", UI.getFlags(), makeArrayRef(UnwindFlags));
- W.printNumber("PrologSize", UI.PrologSize);
- if (UI.getFrameRegister() != 0) {
- W.printEnum("FrameRegister", UI.getFrameRegister(),
- makeArrayRef(UnwindOpInfo));
- W.printHex("FrameOffset", UI.getFrameOffset());
- } else {
- W.printString("FrameRegister", StringRef("-"));
- W.printString("FrameOffset", StringRef("-"));
- }
-
- W.printNumber("UnwindCodeCount", UI.NumCodes);
- {
- ListScope CodesD(W, "UnwindCodes");
- ArrayRef<UnwindCode> UCs(&UI.UnwindCodes[0], UI.NumCodes);
- for (const UnwindCode *I = UCs.begin(), *E = UCs.end(); I < E; ++I) {
- unsigned UsedSlots = getNumUsedSlots(*I);
- if (UsedSlots > UCs.size()) {
- errs() << "Corrupt unwind data";
- return;
- }
- printUnwindCode(UI, ArrayRef<UnwindCode>(I, E));
- I += UsedSlots - 1;
- }
- }
-
- uint64_t LSDAOffset = OffsetInSection + getOffsetOfLSDA(UI);
- if (UI.getFlags() & (UNW_ExceptionHandler | UNW_TerminateHandler)) {
- W.printString("Handler", formatSymbol(Rels, LSDAOffset,
- UI.getLanguageSpecificHandlerOffset()));
- } else if (UI.getFlags() & UNW_ChainInfo) {
- const RuntimeFunction *Chained = UI.getChainedFunctionEntry();
- if (Chained) {
- DictScope D(W, "Chained");
- W.printString("StartAddress", formatSymbol(Rels, LSDAOffset + 0,
- Chained->StartAddress));
- W.printString("EndAddress", formatSymbol(Rels, LSDAOffset + 4,
- Chained->EndAddress));
- W.printString("UnwindInfoAddress", formatSymbol(Rels, LSDAOffset + 8,
- Chained->UnwindInfoOffset));
- }
- }
-}
-
-// Prints one unwind code. Because an unwind code can occupy up to 3 slots in
-// the unwind codes array, this function requires that the correct number of
-// slots is provided.
-void COFFDumper::printUnwindCode(const Win64EH::UnwindInfo& UI,
- ArrayRef<UnwindCode> UCs) {
- assert(UCs.size() >= getNumUsedSlots(UCs[0]));
-
- W.startLine() << format("0x%02X: ", unsigned(UCs[0].u.CodeOffset))
- << getUnwindCodeTypeName(UCs[0].getUnwindOp());
-
- uint32_t AllocSize = 0;
-
- switch (UCs[0].getUnwindOp()) {
- case UOP_PushNonVol:
- outs() << " reg=" << getUnwindRegisterName(UCs[0].getOpInfo());
+ switch (Header->Machine) {
+ case COFF::IMAGE_FILE_MACHINE_AMD64: {
+ Win64EH::Dumper Dumper(W);
+ Win64EH::Dumper::SymbolResolver Resolver =
+ [](const object::coff_section *Section, uint64_t Offset,
+ SymbolRef &Symbol, void *user_data) -> error_code {
+ COFFDumper *Dumper = reinterpret_cast<COFFDumper*>(user_data);
+ return Dumper->resolveSymbol(Section, Offset, Symbol);
+ };
+ Win64EH::Dumper::Context Ctx(*Obj, Resolver, this);
+ Dumper.printData(Ctx);
break;
-
- case UOP_AllocLarge:
- if (UCs[0].getOpInfo() == 0) {
- AllocSize = UCs[1].FrameOffset * 8;
- } else {
- AllocSize = getLargeSlotValue(UCs);
- }
- outs() << " size=" << AllocSize;
- break;
- case UOP_AllocSmall:
- outs() << " size=" << ((UCs[0].getOpInfo() + 1) * 8);
- break;
- case UOP_SetFPReg:
- if (UI.getFrameRegister() == 0) {
- outs() << " reg=<invalid>";
- } else {
- outs() << " reg=" << getUnwindRegisterName(UI.getFrameRegister())
- << format(", offset=0x%X", UI.getFrameOffset() * 16);
- }
- break;
- case UOP_SaveNonVol:
- outs() << " reg=" << getUnwindRegisterName(UCs[0].getOpInfo())
- << format(", offset=0x%X", UCs[1].FrameOffset * 8);
- break;
- case UOP_SaveNonVolBig:
- outs() << " reg=" << getUnwindRegisterName(UCs[0].getOpInfo())
- << format(", offset=0x%X", getLargeSlotValue(UCs));
- break;
- case UOP_SaveXMM128:
- outs() << " reg=XMM" << static_cast<uint32_t>(UCs[0].getOpInfo())
- << format(", offset=0x%X", UCs[1].FrameOffset * 16);
- break;
- case UOP_SaveXMM128Big:
- outs() << " reg=XMM" << static_cast<uint32_t>(UCs[0].getOpInfo())
- << format(", offset=0x%X", getLargeSlotValue(UCs));
- break;
- case UOP_PushMachFrame:
- outs() << " errcode=" << (UCs[0].getOpInfo() == 0 ? "no" : "yes");
+ }
+ default:
+ W.printEnum("unsupported Image Machine", Header->Machine,
+ makeArrayRef(ImageFileMachineType));
break;
}
-
- outs() << "\n";
}
+
generated by cgit v1.1 at 2024-12-22 16:06:08 +0000