using namespace llvm;
using namespace object;
+void WasmSymbol::print(raw_ostream &Out) const {
+ Out << "Name=" << Info.Name
+ << ", Kind=" << toString(wasm::WasmSymbolType(Info.Kind))
+ << ", Flags=" << Info.Flags;
+ if (!isTypeData()) {
+ Out << ", ElemIndex=" << Info.ElementIndex;
+ } else if (isDefined()) {
+ Out << ", Segment=" << Info.DataRef.Segment;
+ Out << ", Offset=" << Info.DataRef.Offset;
+ Out << ", Size=" << Info.DataRef.Size;
+ }
+}
+
+#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
+LLVM_DUMP_METHOD void WasmSymbol::dump() const { print(dbgs()); }
+#endif
+
Expected<std::unique_ptr<WasmObjectFile>>
ObjectFile::createWasmObjectFile(MemoryBufferRef Buffer) {
Error Err = Error::success();
#define VARUINT7_MAX (1<<7)
#define VARUINT1_MAX (1)
-static uint8_t readUint8(const uint8_t *&Ptr) { return *Ptr++; }
+static uint8_t readUint8(WasmObjectFile::ReadContext &Ctx) {
+ if (Ctx.Ptr == Ctx.End)
+ report_fatal_error("EOF while reading uint8");
+ return *Ctx.Ptr++;
+}
-static uint32_t readUint32(const uint8_t *&Ptr) {
- uint32_t Result = support::endian::read32le(Ptr);
- Ptr += sizeof(Result);
+static uint32_t readUint32(WasmObjectFile::ReadContext &Ctx) {
+ if (Ctx.Ptr + 4 > Ctx.End)
+ report_fatal_error("EOF while reading uint32");
+ uint32_t Result = support::endian::read32le(Ctx.Ptr);
+ Ctx.Ptr += 4;
return Result;
}
-static int32_t readFloat32(const uint8_t *&Ptr) {
+static int32_t readFloat32(WasmObjectFile::ReadContext &Ctx) {
int32_t Result = 0;
- memcpy(&Result, Ptr, sizeof(Result));
- Ptr += sizeof(Result);
+ memcpy(&Result, Ctx.Ptr, sizeof(Result));
+ Ctx.Ptr += sizeof(Result);
return Result;
}
-static int64_t readFloat64(const uint8_t *&Ptr) {
+static int64_t readFloat64(WasmObjectFile::ReadContext &Ctx) {
int64_t Result = 0;
- memcpy(&Result, Ptr, sizeof(Result));
- Ptr += sizeof(Result);
+ memcpy(&Result, Ctx.Ptr, sizeof(Result));
+ Ctx.Ptr += sizeof(Result);
return Result;
}
-static uint64_t readULEB128(const uint8_t *&Ptr) {
+static uint64_t readULEB128(WasmObjectFile::ReadContext &Ctx) {
unsigned Count;
- uint64_t Result = decodeULEB128(Ptr, &Count);
- Ptr += Count;
+ const char* Error = nullptr;
+ uint64_t Result = decodeULEB128(Ctx.Ptr, &Count, Ctx.End, &Error);
+ if (Error)
+ report_fatal_error(Error);
+ Ctx.Ptr += Count;
return Result;
}
-static StringRef readString(const uint8_t *&Ptr) {
- uint32_t StringLen = readULEB128(Ptr);
- StringRef Return = StringRef(reinterpret_cast<const char *>(Ptr), StringLen);
- Ptr += StringLen;
+static StringRef readString(WasmObjectFile::ReadContext &Ctx) {
+ uint32_t StringLen = readULEB128(Ctx);
+ if (Ctx.Ptr + StringLen > Ctx.End)
+ report_fatal_error("EOF while reading string");
+ StringRef Return =
+ StringRef(reinterpret_cast<const char *>(Ctx.Ptr), StringLen);
+ Ctx.Ptr += StringLen;
return Return;
}
-static int64_t readLEB128(const uint8_t *&Ptr) {
+static int64_t readLEB128(WasmObjectFile::ReadContext &Ctx) {
unsigned Count;
- uint64_t Result = decodeSLEB128(Ptr, &Count);
- Ptr += Count;
+ const char* Error = nullptr;
+ uint64_t Result = decodeSLEB128(Ctx.Ptr, &Count, Ctx.End, &Error);
+ if (Error)
+ report_fatal_error(Error);
+ Ctx.Ptr += Count;
return Result;
}
-static uint8_t readVaruint1(const uint8_t *&Ptr) {
- int64_t result = readLEB128(Ptr);
- assert(result <= VARUINT1_MAX && result >= 0);
+static uint8_t readVaruint1(WasmObjectFile::ReadContext &Ctx) {
+ int64_t result = readLEB128(Ctx);
+ if (result > VARUINT1_MAX || result < 0)
+ report_fatal_error("LEB is outside Varuint1 range");
return result;
}
-static int32_t readVarint32(const uint8_t *&Ptr) {
- int64_t result = readLEB128(Ptr);
- assert(result <= INT32_MAX && result >= INT32_MIN);
+static int32_t readVarint32(WasmObjectFile::ReadContext &Ctx) {
+ int64_t result = readLEB128(Ctx);
+ if (result > INT32_MAX || result < INT32_MIN)
+ report_fatal_error("LEB is outside Varint32 range");
return result;
}
-static uint32_t readVaruint32(const uint8_t *&Ptr) {
- uint64_t result = readULEB128(Ptr);
- assert(result <= UINT32_MAX);
+static uint32_t readVaruint32(WasmObjectFile::ReadContext &Ctx) {
+ uint64_t result = readULEB128(Ctx);
+ if (result > UINT32_MAX)
+ report_fatal_error("LEB is outside Varuint32 range");
return result;
}
-static int64_t readVarint64(const uint8_t *&Ptr) {
- return readLEB128(Ptr);
+static int64_t readVarint64(WasmObjectFile::ReadContext &Ctx) {
+ return readLEB128(Ctx);
}
-static uint8_t readOpcode(const uint8_t *&Ptr) {
- return readUint8(Ptr);
+static uint8_t readOpcode(WasmObjectFile::ReadContext &Ctx) {
+ return readUint8(Ctx);
}
-static Error readInitExpr(wasm::WasmInitExpr &Expr, const uint8_t *&Ptr) {
- Expr.Opcode = readOpcode(Ptr);
+static Error readInitExpr(wasm::WasmInitExpr &Expr,
+ WasmObjectFile::ReadContext &Ctx) {
+ Expr.Opcode = readOpcode(Ctx);
switch (Expr.Opcode) {
case wasm::WASM_OPCODE_I32_CONST:
- Expr.Value.Int32 = readVarint32(Ptr);
+ Expr.Value.Int32 = readVarint32(Ctx);
break;
case wasm::WASM_OPCODE_I64_CONST:
- Expr.Value.Int64 = readVarint64(Ptr);
+ Expr.Value.Int64 = readVarint64(Ctx);
break;
case wasm::WASM_OPCODE_F32_CONST:
- Expr.Value.Float32 = readFloat32(Ptr);
+ Expr.Value.Float32 = readFloat32(Ctx);
break;
case wasm::WASM_OPCODE_F64_CONST:
- Expr.Value.Float64 = readFloat64(Ptr);
+ Expr.Value.Float64 = readFloat64(Ctx);
break;
case wasm::WASM_OPCODE_GET_GLOBAL:
- Expr.Value.Global = readULEB128(Ptr);
+ Expr.Value.Global = readULEB128(Ctx);
break;
default:
return make_error<GenericBinaryError>("Invalid opcode in init_expr",
object_error::parse_failed);
}
- uint8_t EndOpcode = readOpcode(Ptr);
+ uint8_t EndOpcode = readOpcode(Ctx);
if (EndOpcode != wasm::WASM_OPCODE_END) {
return make_error<GenericBinaryError>("Invalid init_expr",
object_error::parse_failed);
return Error::success();
}
-static wasm::WasmLimits readLimits(const uint8_t *&Ptr) {
+static wasm::WasmLimits readLimits(WasmObjectFile::ReadContext &Ctx) {
wasm::WasmLimits Result;
- Result.Flags = readVaruint1(Ptr);
- Result.Initial = readVaruint32(Ptr);
+ Result.Flags = readVaruint1(Ctx);
+ Result.Initial = readVaruint32(Ctx);
if (Result.Flags & wasm::WASM_LIMITS_FLAG_HAS_MAX)
- Result.Maximum = readVaruint32(Ptr);
+ Result.Maximum = readVaruint32(Ctx);
return Result;
}
-static wasm::WasmTable readTable(const uint8_t *&Ptr) {
+static wasm::WasmTable readTable(WasmObjectFile::ReadContext &Ctx) {
wasm::WasmTable Table;
- Table.ElemType = readUint8(Ptr);
- Table.Limits = readLimits(Ptr);
+ Table.ElemType = readUint8(Ctx);
+ Table.Limits = readLimits(Ctx);
return Table;
}
-static Error readSection(WasmSection &Section, const uint8_t *&Ptr,
- const uint8_t *Start, const uint8_t *Eof) {
- Section.Offset = Ptr - Start;
- Section.Type = readUint8(Ptr);
- uint32_t Size = readVaruint32(Ptr);
+static Error readSection(WasmSection &Section,
+ WasmObjectFile::ReadContext &Ctx) {
+ Section.Offset = Ctx.Ptr - Ctx.Start;
+ Section.Type = readUint8(Ctx);
+ LLVM_DEBUG(dbgs() << "readSection type=" << Section.Type << "\n");
+ uint32_t Size = readVaruint32(Ctx);
if (Size == 0)
return make_error<StringError>("Zero length section",
object_error::parse_failed);
- if (Ptr + Size > Eof)
+ if (Ctx.Ptr + Size > Ctx.End)
return make_error<StringError>("Section too large",
object_error::parse_failed);
- Section.Content = ArrayRef<uint8_t>(Ptr, Size);
- Ptr += Size;
+ if (Section.Type == wasm::WASM_SEC_CUSTOM) {
+ const uint8_t *NameStart = Ctx.Ptr;
+ Section.Name = readString(Ctx);
+ Size -= Ctx.Ptr - NameStart;
+ }
+ Section.Content = ArrayRef<uint8_t>(Ctx.Ptr, Size);
+ Ctx.Ptr += Size;
return Error::success();
}
return;
}
- const uint8_t *Eof = getPtr(getData().size());
- const uint8_t *Ptr = getPtr(4);
+ ReadContext Ctx;
+ Ctx.Start = getPtr(0);
+ Ctx.Ptr = Ctx.Start + 4;
+ Ctx.End = Ctx.Start + getData().size();
- if (Ptr + 4 > Eof) {
+ if (Ctx.Ptr + 4 > Ctx.End) {
Err = make_error<StringError>("Missing version number",
object_error::parse_failed);
return;
}
- Header.Version = readUint32(Ptr);
+ Header.Version = readUint32(Ctx);
if (Header.Version != wasm::WasmVersion) {
Err = make_error<StringError>("Bad version number",
object_error::parse_failed);
}
WasmSection Sec;
- while (Ptr < Eof) {
- if ((Err = readSection(Sec, Ptr, getPtr(0), Eof)))
+ while (Ctx.Ptr < Ctx.End) {
+ if ((Err = readSection(Sec, Ctx)))
return;
if ((Err = parseSection(Sec)))
return;
}
Error WasmObjectFile::parseSection(WasmSection &Sec) {
- const uint8_t* Start = Sec.Content.data();
- const uint8_t* End = Start + Sec.Content.size();
+ ReadContext Ctx;
+ Ctx.Start = Sec.Content.data();
+ Ctx.End = Ctx.Start + Sec.Content.size();
+ Ctx.Ptr = Ctx.Start;
switch (Sec.Type) {
case wasm::WASM_SEC_CUSTOM:
- return parseCustomSection(Sec, Start, End);
+ return parseCustomSection(Sec, Ctx);
case wasm::WASM_SEC_TYPE:
- return parseTypeSection(Start, End);
+ return parseTypeSection(Ctx);
case wasm::WASM_SEC_IMPORT:
- return parseImportSection(Start, End);
+ return parseImportSection(Ctx);
case wasm::WASM_SEC_FUNCTION:
- return parseFunctionSection(Start, End);
+ return parseFunctionSection(Ctx);
case wasm::WASM_SEC_TABLE:
- return parseTableSection(Start, End);
+ return parseTableSection(Ctx);
case wasm::WASM_SEC_MEMORY:
- return parseMemorySection(Start, End);
+ return parseMemorySection(Ctx);
case wasm::WASM_SEC_GLOBAL:
- return parseGlobalSection(Start, End);
+ return parseGlobalSection(Ctx);
case wasm::WASM_SEC_EXPORT:
- return parseExportSection(Start, End);
+ return parseExportSection(Ctx);
case wasm::WASM_SEC_START:
- return parseStartSection(Start, End);
+ return parseStartSection(Ctx);
case wasm::WASM_SEC_ELEM:
- return parseElemSection(Start, End);
+ return parseElemSection(Ctx);
case wasm::WASM_SEC_CODE:
- return parseCodeSection(Start, End);
+ return parseCodeSection(Ctx);
case wasm::WASM_SEC_DATA:
- return parseDataSection(Start, End);
+ return parseDataSection(Ctx);
default:
return make_error<GenericBinaryError>("Bad section type",
object_error::parse_failed);
}
}
-Error WasmObjectFile::parseNameSection(const uint8_t *Ptr, const uint8_t *End) {
+Error WasmObjectFile::parseNameSection(ReadContext &Ctx) {
llvm::DenseSet<uint64_t> Seen;
if (Functions.size() != FunctionTypes.size()) {
return make_error<GenericBinaryError>("Names must come after code section",
object_error::parse_failed);
}
- while (Ptr < End) {
- uint8_t Type = readUint8(Ptr);
- uint32_t Size = readVaruint32(Ptr);
- const uint8_t *SubSectionEnd = Ptr + Size;
+ while (Ctx.Ptr < Ctx.End) {
+ uint8_t Type = readUint8(Ctx);
+ uint32_t Size = readVaruint32(Ctx);
+ const uint8_t *SubSectionEnd = Ctx.Ptr + Size;
switch (Type) {
case wasm::WASM_NAMES_FUNCTION: {
- uint32_t Count = readVaruint32(Ptr);
+ uint32_t Count = readVaruint32(Ctx);
while (Count--) {
- uint32_t Index = readVaruint32(Ptr);
+ uint32_t Index = readVaruint32(Ctx);
if (!Seen.insert(Index).second)
return make_error<GenericBinaryError>("Function named more than once",
object_error::parse_failed);
- StringRef Name = readString(Ptr);
+ StringRef Name = readString(Ctx);
if (!isValidFunctionIndex(Index) || Name.empty())
return make_error<GenericBinaryError>("Invalid name entry",
object_error::parse_failed);
DebugNames.push_back(wasm::WasmFunctionName{Index, Name});
- if (isDefinedFunctionIndex(Index)) {
- // Override any existing name; the name specified by the "names"
- // section is the Function's canonical name.
- getDefinedFunction(Index).Name = Name;
- }
+ if (isDefinedFunctionIndex(Index))
+ getDefinedFunction(Index).DebugName = Name;
}
break;
}
// Ignore local names for now
case wasm::WASM_NAMES_LOCAL:
default:
- Ptr += Size;
+ Ctx.Ptr += Size;
break;
}
- if (Ptr != SubSectionEnd)
+ if (Ctx.Ptr != SubSectionEnd)
return make_error<GenericBinaryError>("Name sub-section ended prematurely",
object_error::parse_failed);
}
- if (Ptr != End)
+ if (Ctx.Ptr != Ctx.End)
return make_error<GenericBinaryError>("Name section ended prematurely",
object_error::parse_failed);
return Error::success();
}
-Error WasmObjectFile::parseLinkingSection(const uint8_t *Ptr,
- const uint8_t *End) {
+Error WasmObjectFile::parseLinkingSection(ReadContext &Ctx) {
HasLinkingSection = true;
if (Functions.size() != FunctionTypes.size()) {
return make_error<GenericBinaryError>(
"Linking data must come after code section", object_error::parse_failed);
}
- while (Ptr < End) {
- uint8_t Type = readUint8(Ptr);
- uint32_t Size = readVaruint32(Ptr);
- const uint8_t *SubSectionEnd = Ptr + Size;
+ LinkingData.Version = readVaruint32(Ctx);
+ if (LinkingData.Version != wasm::WasmMetadataVersion) {
+ return make_error<GenericBinaryError>(
+ "Unexpected metadata version: " + Twine(LinkingData.Version) +
+ " (Expected: " + Twine(wasm::WasmMetadataVersion) + ")",
+ object_error::parse_failed);
+ }
+
+ const uint8_t *OrigEnd = Ctx.End;
+ while (Ctx.Ptr < OrigEnd) {
+ Ctx.End = OrigEnd;
+ uint8_t Type = readUint8(Ctx);
+ uint32_t Size = readVaruint32(Ctx);
+ LLVM_DEBUG(dbgs() << "readSubsection type=" << int(Type) << " size=" << Size
+ << "\n");
+ Ctx.End = Ctx.Ptr + Size;
switch (Type) {
case wasm::WASM_SYMBOL_TABLE:
- if (Error Err = parseLinkingSectionSymtab(Ptr, SubSectionEnd))
+ if (Error Err = parseLinkingSectionSymtab(Ctx))
return Err;
break;
case wasm::WASM_SEGMENT_INFO: {
- uint32_t Count = readVaruint32(Ptr);
+ uint32_t Count = readVaruint32(Ctx);
if (Count > DataSegments.size())
return make_error<GenericBinaryError>("Too many segment names",
object_error::parse_failed);
for (uint32_t i = 0; i < Count; i++) {
- DataSegments[i].Data.Name = readString(Ptr);
- DataSegments[i].Data.Alignment = readVaruint32(Ptr);
- DataSegments[i].Data.Flags = readVaruint32(Ptr);
+ DataSegments[i].Data.Name = readString(Ctx);
+ DataSegments[i].Data.Alignment = readVaruint32(Ctx);
+ DataSegments[i].Data.Flags = readVaruint32(Ctx);
}
break;
}
case wasm::WASM_INIT_FUNCS: {
- uint32_t Count = readVaruint32(Ptr);
+ uint32_t Count = readVaruint32(Ctx);
LinkingData.InitFunctions.reserve(Count);
for (uint32_t i = 0; i < Count; i++) {
wasm::WasmInitFunc Init;
- Init.Priority = readVaruint32(Ptr);
- Init.Symbol = readVaruint32(Ptr);
+ Init.Priority = readVaruint32(Ctx);
+ Init.Symbol = readVaruint32(Ctx);
if (!isValidFunctionSymbol(Init.Symbol))
return make_error<GenericBinaryError>("Invalid function symbol: " +
Twine(Init.Symbol),
break;
}
case wasm::WASM_COMDAT_INFO:
- if (Error Err = parseLinkingSectionComdat(Ptr, SubSectionEnd))
+ if (Error Err = parseLinkingSectionComdat(Ctx))
return Err;
break;
default:
- Ptr += Size;
+ Ctx.Ptr += Size;
break;
}
- if (Ptr != SubSectionEnd)
+ if (Ctx.Ptr != Ctx.End)
return make_error<GenericBinaryError>(
"Linking sub-section ended prematurely", object_error::parse_failed);
}
- if (Ptr != End)
+ if (Ctx.Ptr != OrigEnd)
return make_error<GenericBinaryError>("Linking section ended prematurely",
object_error::parse_failed);
return Error::success();
}
-Error WasmObjectFile::parseLinkingSectionSymtab(const uint8_t *&Ptr,
- const uint8_t *End) {
- uint32_t Count = readVaruint32(Ptr);
+Error WasmObjectFile::parseLinkingSectionSymtab(ReadContext &Ctx) {
+ uint32_t Count = readVaruint32(Ctx);
LinkingData.SymbolTable.reserve(Count);
Symbols.reserve(Count);
StringSet<> SymbolNames;
const wasm::WasmSignature *FunctionType = nullptr;
const wasm::WasmGlobalType *GlobalType = nullptr;
- Info.Kind = readUint8(Ptr);
- Info.Flags = readVaruint32(Ptr);
+ Info.Kind = readUint8(Ctx);
+ Info.Flags = readVaruint32(Ctx);
bool IsDefined = (Info.Flags & wasm::WASM_SYMBOL_UNDEFINED) == 0;
switch (Info.Kind) {
case wasm::WASM_SYMBOL_TYPE_FUNCTION:
- Info.ElementIndex = readVaruint32(Ptr);
+ Info.ElementIndex = readVaruint32(Ctx);
if (!isValidFunctionIndex(Info.ElementIndex) ||
IsDefined != isDefinedFunctionIndex(Info.ElementIndex))
return make_error<GenericBinaryError>("invalid function symbol index",
object_error::parse_failed);
if (IsDefined) {
- Info.Name = readString(Ptr);
+ Info.Name = readString(Ctx);
unsigned FuncIndex = Info.ElementIndex - NumImportedFunctions;
FunctionType = &Signatures[FunctionTypes[FuncIndex]];
wasm::WasmFunction &Function = Functions[FuncIndex];
- if (Function.Name.empty()) {
- // Use the symbol's name to set a name for the Function, but only if
- // one hasn't already been set.
- Function.Name = Info.Name;
- }
+ if (Function.SymbolName.empty())
+ Function.SymbolName = Info.Name;
} else {
wasm::WasmImport &Import = *ImportedFunctions[Info.ElementIndex];
FunctionType = &Signatures[Import.SigIndex];
Info.Name = Import.Field;
+ Info.Module = Import.Module;
}
break;
case wasm::WASM_SYMBOL_TYPE_GLOBAL:
- Info.ElementIndex = readVaruint32(Ptr);
+ Info.ElementIndex = readVaruint32(Ctx);
if (!isValidGlobalIndex(Info.ElementIndex) ||
IsDefined != isDefinedGlobalIndex(Info.ElementIndex))
return make_error<GenericBinaryError>("invalid global symbol index",
object_error::parse_failed);
+ if (!IsDefined &&
+ (Info.Flags & wasm::WASM_SYMBOL_BINDING_MASK) ==
+ wasm::WASM_SYMBOL_BINDING_WEAK)
+ return make_error<GenericBinaryError>("undefined weak global symbol",
+ object_error::parse_failed);
if (IsDefined) {
- Info.Name = readString(Ptr);
+ Info.Name = readString(Ctx);
unsigned GlobalIndex = Info.ElementIndex - NumImportedGlobals;
wasm::WasmGlobal &Global = Globals[GlobalIndex];
GlobalType = &Global.Type;
- if (Global.Name.empty()) {
- // Use the symbol's name to set a name for the Global, but only if
- // one hasn't already been set.
- Global.Name = Info.Name;
- }
+ if (Global.SymbolName.empty())
+ Global.SymbolName = Info.Name;
} else {
wasm::WasmImport &Import = *ImportedGlobals[Info.ElementIndex];
Info.Name = Import.Field;
break;
case wasm::WASM_SYMBOL_TYPE_DATA:
- Info.Name = readString(Ptr);
+ Info.Name = readString(Ctx);
if (IsDefined) {
- uint32_t Index = readVaruint32(Ptr);
+ uint32_t Index = readVaruint32(Ctx);
if (Index >= DataSegments.size())
return make_error<GenericBinaryError>("invalid data symbol index",
object_error::parse_failed);
- uint32_t Offset = readVaruint32(Ptr);
- uint32_t Size = readVaruint32(Ptr);
+ uint32_t Offset = readVaruint32(Ctx);
+ uint32_t Size = readVaruint32(Ctx);
if (Offset + Size > DataSegments[Index].Data.Content.size())
return make_error<GenericBinaryError>("invalid data symbol offset",
object_error::parse_failed);
}
break;
+ case wasm::WASM_SYMBOL_TYPE_SECTION: {
+ if ((Info.Flags & wasm::WASM_SYMBOL_BINDING_MASK) !=
+ wasm::WASM_SYMBOL_BINDING_LOCAL)
+ return make_error<GenericBinaryError>(
+ "Section symbols must have local binding",
+ object_error::parse_failed);
+ Info.ElementIndex = readVaruint32(Ctx);
+ // Use somewhat unique section name as symbol name.
+ StringRef SectionName = Sections[Info.ElementIndex].Name;
+ Info.Name = SectionName;
+ break;
+ }
+
default:
return make_error<GenericBinaryError>("Invalid symbol type",
object_error::parse_failed);
LinkingData.SymbolTable.emplace_back(Info);
Symbols.emplace_back(LinkingData.SymbolTable.back(), FunctionType,
GlobalType);
- DEBUG(dbgs() << "Adding symbol: " << Symbols.back() << "\n");
+ LLVM_DEBUG(dbgs() << "Adding symbol: " << Symbols.back() << "\n");
}
return Error::success();
}
-Error WasmObjectFile::parseLinkingSectionComdat(const uint8_t *&Ptr,
- const uint8_t *End)
-{
- uint32_t ComdatCount = readVaruint32(Ptr);
+Error WasmObjectFile::parseLinkingSectionComdat(ReadContext &Ctx) {
+ uint32_t ComdatCount = readVaruint32(Ctx);
StringSet<> ComdatSet;
- while (ComdatCount--) {
- StringRef Name = readString(Ptr);
+ for (unsigned ComdatIndex = 0; ComdatIndex < ComdatCount; ++ComdatIndex) {
+ StringRef Name = readString(Ctx);
if (Name.empty() || !ComdatSet.insert(Name).second)
return make_error<GenericBinaryError>("Bad/duplicate COMDAT name " + Twine(Name),
object_error::parse_failed);
- Comdats.emplace_back(Name);
- uint32_t Flags = readVaruint32(Ptr);
+ LinkingData.Comdats.emplace_back(Name);
+ uint32_t Flags = readVaruint32(Ctx);
if (Flags != 0)
return make_error<GenericBinaryError>("Unsupported COMDAT flags",
object_error::parse_failed);
- uint32_t EntryCount = readVaruint32(Ptr);
+ uint32_t EntryCount = readVaruint32(Ctx);
while (EntryCount--) {
- unsigned Kind = readVaruint32(Ptr);
- unsigned Index = readVaruint32(Ptr);
+ unsigned Kind = readVaruint32(Ctx);
+ unsigned Index = readVaruint32(Ctx);
switch (Kind) {
default:
return make_error<GenericBinaryError>("Invalid COMDAT entry type",
if (Index >= DataSegments.size())
return make_error<GenericBinaryError>("COMDAT data index out of range",
object_error::parse_failed);
- if (!DataSegments[Index].Data.Comdat.empty())
+ if (DataSegments[Index].Data.Comdat != UINT32_MAX)
return make_error<GenericBinaryError>("Data segment in two COMDATs",
object_error::parse_failed);
- DataSegments[Index].Data.Comdat = Name;
+ DataSegments[Index].Data.Comdat = ComdatIndex;
break;
case wasm::WASM_COMDAT_FUNCTION:
if (!isDefinedFunctionIndex(Index))
return make_error<GenericBinaryError>("COMDAT function index out of range",
object_error::parse_failed);
- if (!getDefinedFunction(Index).Comdat.empty())
+ if (getDefinedFunction(Index).Comdat != UINT32_MAX)
return make_error<GenericBinaryError>("Function in two COMDATs",
object_error::parse_failed);
- getDefinedFunction(Index).Comdat = Name;
+ getDefinedFunction(Index).Comdat = ComdatIndex;
break;
}
}
return Error::success();
}
-WasmSection* WasmObjectFile::findCustomSectionByName(StringRef Name) {
- for (WasmSection& Section : Sections) {
- if (Section.Type == wasm::WASM_SEC_CUSTOM && Section.Name == Name)
- return &Section;
- }
- return nullptr;
-}
-
-WasmSection* WasmObjectFile::findSectionByType(uint32_t Type) {
- assert(Type != wasm::WASM_SEC_CUSTOM);
- for (WasmSection& Section : Sections) {
- if (Section.Type == Type)
- return &Section;
- }
- return nullptr;
-}
-
-Error WasmObjectFile::parseRelocSection(StringRef Name, const uint8_t *Ptr,
- const uint8_t *End) {
- uint8_t SectionCode = readUint8(Ptr);
- WasmSection* Section = nullptr;
- if (SectionCode == wasm::WASM_SEC_CUSTOM) {
- StringRef Name = readString(Ptr);
- Section = findCustomSectionByName(Name);
- } else {
- Section = findSectionByType(SectionCode);
- }
- if (!Section)
- return make_error<GenericBinaryError>("Invalid section code",
+Error WasmObjectFile::parseRelocSection(StringRef Name, ReadContext &Ctx) {
+ uint32_t SectionIndex = readVaruint32(Ctx);
+ if (SectionIndex >= Sections.size())
+ return make_error<GenericBinaryError>("Invalid section index",
object_error::parse_failed);
- uint32_t RelocCount = readVaruint32(Ptr);
- uint32_t LastOffset = 0;
- uint32_t EndOffset = Section->Content.size();
+ WasmSection& Section = Sections[SectionIndex];
+ uint32_t RelocCount = readVaruint32(Ctx);
+ uint32_t EndOffset = Section.Content.size();
while (RelocCount--) {
wasm::WasmRelocation Reloc = {};
- Reloc.Type = readVaruint32(Ptr);
- Reloc.Offset = readVaruint32(Ptr);
- Reloc.Index = readVaruint32(Ptr);
+ Reloc.Type = readVaruint32(Ctx);
+ Reloc.Offset = readVaruint32(Ctx);
+ Reloc.Index = readVaruint32(Ctx);
switch (Reloc.Type) {
case wasm::R_WEBASSEMBLY_FUNCTION_INDEX_LEB:
case wasm::R_WEBASSEMBLY_TABLE_INDEX_SLEB:
if (!isValidDataSymbol(Reloc.Index))
return make_error<GenericBinaryError>("Bad relocation data index",
object_error::parse_failed);
- Reloc.Addend = readVarint32(Ptr);
+ Reloc.Addend = readVarint32(Ctx);
+ break;
+ case wasm::R_WEBASSEMBLY_FUNCTION_OFFSET_I32:
+ if (!isValidFunctionSymbol(Reloc.Index))
+ return make_error<GenericBinaryError>("Bad relocation function index",
+ object_error::parse_failed);
+ Reloc.Addend = readVarint32(Ctx);
+ break;
+ case wasm::R_WEBASSEMBLY_SECTION_OFFSET_I32:
+ if (!isValidSectionSymbol(Reloc.Index))
+ return make_error<GenericBinaryError>("Bad relocation section index",
+ object_error::parse_failed);
+ Reloc.Addend = readVarint32(Ctx);
break;
default:
return make_error<GenericBinaryError>("Bad relocation type: " +
// to check that.
uint64_t Size = 5;
if (Reloc.Type == wasm::R_WEBASSEMBLY_TABLE_INDEX_I32 ||
- Reloc.Type == wasm::R_WEBASSEMBLY_MEMORY_ADDR_I32)
+ Reloc.Type == wasm::R_WEBASSEMBLY_MEMORY_ADDR_I32 ||
+ Reloc.Type == wasm::R_WEBASSEMBLY_SECTION_OFFSET_I32 ||
+ Reloc.Type == wasm::R_WEBASSEMBLY_FUNCTION_OFFSET_I32)
Size = 4;
- if (Reloc.Offset < LastOffset || Reloc.Offset + Size > EndOffset)
+ if (Reloc.Offset + Size > EndOffset)
return make_error<GenericBinaryError>("Bad relocation offset",
object_error::parse_failed);
- LastOffset = Reloc.Offset;
- Section->Relocations.push_back(Reloc);
+ Section.Relocations.push_back(Reloc);
}
- if (Ptr != End)
+ if (Ctx.Ptr != Ctx.End)
return make_error<GenericBinaryError>("Reloc section ended prematurely",
object_error::parse_failed);
return Error::success();
}
-Error WasmObjectFile::parseCustomSection(WasmSection &Sec,
- const uint8_t *Ptr, const uint8_t *End) {
- Sec.Name = readString(Ptr);
+Error WasmObjectFile::parseCustomSection(WasmSection &Sec, ReadContext &Ctx) {
if (Sec.Name == "name") {
- if (Error Err = parseNameSection(Ptr, End))
+ if (Error Err = parseNameSection(Ctx))
return Err;
} else if (Sec.Name == "linking") {
- if (Error Err = parseLinkingSection(Ptr, End))
+ if (Error Err = parseLinkingSection(Ctx))
return Err;
} else if (Sec.Name.startswith("reloc.")) {
- if (Error Err = parseRelocSection(Sec.Name, Ptr, End))
+ if (Error Err = parseRelocSection(Sec.Name, Ctx))
return Err;
}
return Error::success();
}
-Error WasmObjectFile::parseTypeSection(const uint8_t *Ptr, const uint8_t *End) {
- uint32_t Count = readVaruint32(Ptr);
+Error WasmObjectFile::parseTypeSection(ReadContext &Ctx) {
+ uint32_t Count = readVaruint32(Ctx);
Signatures.reserve(Count);
while (Count--) {
wasm::WasmSignature Sig;
Sig.ReturnType = wasm::WASM_TYPE_NORESULT;
- uint8_t Form = readUint8(Ptr);
+ uint8_t Form = readUint8(Ctx);
if (Form != wasm::WASM_TYPE_FUNC) {
return make_error<GenericBinaryError>("Invalid signature type",
object_error::parse_failed);
}
- uint32_t ParamCount = readVaruint32(Ptr);
+ uint32_t ParamCount = readVaruint32(Ctx);
Sig.ParamTypes.reserve(ParamCount);
while (ParamCount--) {
- uint32_t ParamType = readUint8(Ptr);
+ uint32_t ParamType = readUint8(Ctx);
Sig.ParamTypes.push_back(ParamType);
}
- uint32_t ReturnCount = readVaruint32(Ptr);
+ uint32_t ReturnCount = readVaruint32(Ctx);
if (ReturnCount) {
if (ReturnCount != 1) {
return make_error<GenericBinaryError>(
"Multiple return types not supported", object_error::parse_failed);
}
- Sig.ReturnType = readUint8(Ptr);
+ Sig.ReturnType = readUint8(Ctx);
}
Signatures.push_back(Sig);
}
- if (Ptr != End)
+ if (Ctx.Ptr != Ctx.End)
return make_error<GenericBinaryError>("Type section ended prematurely",
object_error::parse_failed);
return Error::success();
}
-Error WasmObjectFile::parseImportSection(const uint8_t *Ptr, const uint8_t *End) {
- uint32_t Count = readVaruint32(Ptr);
+Error WasmObjectFile::parseImportSection(ReadContext &Ctx) {
+ uint32_t Count = readVaruint32(Ctx);
Imports.reserve(Count);
for (uint32_t i = 0; i < Count; i++) {
wasm::WasmImport Im;
- Im.Module = readString(Ptr);
- Im.Field = readString(Ptr);
- Im.Kind = readUint8(Ptr);
+ Im.Module = readString(Ctx);
+ Im.Field = readString(Ctx);
+ Im.Kind = readUint8(Ctx);
switch (Im.Kind) {
case wasm::WASM_EXTERNAL_FUNCTION:
NumImportedFunctions++;
- Im.SigIndex = readVaruint32(Ptr);
+ Im.SigIndex = readVaruint32(Ctx);
break;
case wasm::WASM_EXTERNAL_GLOBAL:
NumImportedGlobals++;
- Im.Global.Type = readUint8(Ptr);
- Im.Global.Mutable = readVaruint1(Ptr);
+ Im.Global.Type = readUint8(Ctx);
+ Im.Global.Mutable = readVaruint1(Ctx);
break;
case wasm::WASM_EXTERNAL_MEMORY:
- Im.Memory = readLimits(Ptr);
+ Im.Memory = readLimits(Ctx);
break;
case wasm::WASM_EXTERNAL_TABLE:
- Im.Table = readTable(Ptr);
+ Im.Table = readTable(Ctx);
if (Im.Table.ElemType != wasm::WASM_TYPE_ANYFUNC)
return make_error<GenericBinaryError>("Invalid table element type",
object_error::parse_failed);
}
Imports.push_back(Im);
}
- if (Ptr != End)
+ if (Ctx.Ptr != Ctx.End)
return make_error<GenericBinaryError>("Import section ended prematurely",
object_error::parse_failed);
return Error::success();
}
-Error WasmObjectFile::parseFunctionSection(const uint8_t *Ptr, const uint8_t *End) {
- uint32_t Count = readVaruint32(Ptr);
+Error WasmObjectFile::parseFunctionSection(ReadContext &Ctx) {
+ uint32_t Count = readVaruint32(Ctx);
FunctionTypes.reserve(Count);
uint32_t NumTypes = Signatures.size();
while (Count--) {
- uint32_t Type = readVaruint32(Ptr);
+ uint32_t Type = readVaruint32(Ctx);
if (Type >= NumTypes)
return make_error<GenericBinaryError>("Invalid function type",
object_error::parse_failed);
FunctionTypes.push_back(Type);
}
- if (Ptr != End)
+ if (Ctx.Ptr != Ctx.End)
return make_error<GenericBinaryError>("Function section ended prematurely",
object_error::parse_failed);
return Error::success();
}
-Error WasmObjectFile::parseTableSection(const uint8_t *Ptr, const uint8_t *End) {
- uint32_t Count = readVaruint32(Ptr);
+Error WasmObjectFile::parseTableSection(ReadContext &Ctx) {
+ uint32_t Count = readVaruint32(Ctx);
Tables.reserve(Count);
while (Count--) {
- Tables.push_back(readTable(Ptr));
+ Tables.push_back(readTable(Ctx));
if (Tables.back().ElemType != wasm::WASM_TYPE_ANYFUNC) {
return make_error<GenericBinaryError>("Invalid table element type",
object_error::parse_failed);
}
}
- if (Ptr != End)
+ if (Ctx.Ptr != Ctx.End)
return make_error<GenericBinaryError>("Table section ended prematurely",
object_error::parse_failed);
return Error::success();
}
-Error WasmObjectFile::parseMemorySection(const uint8_t *Ptr, const uint8_t *End) {
- uint32_t Count = readVaruint32(Ptr);
+Error WasmObjectFile::parseMemorySection(ReadContext &Ctx) {
+ uint32_t Count = readVaruint32(Ctx);
Memories.reserve(Count);
while (Count--) {
- Memories.push_back(readLimits(Ptr));
+ Memories.push_back(readLimits(Ctx));
}
- if (Ptr != End)
+ if (Ctx.Ptr != Ctx.End)
return make_error<GenericBinaryError>("Memory section ended prematurely",
object_error::parse_failed);
return Error::success();
}
-Error WasmObjectFile::parseGlobalSection(const uint8_t *Ptr, const uint8_t *End) {
+Error WasmObjectFile::parseGlobalSection(ReadContext &Ctx) {
GlobalSection = Sections.size();
- uint32_t Count = readVaruint32(Ptr);
+ uint32_t Count = readVaruint32(Ctx);
Globals.reserve(Count);
while (Count--) {
wasm::WasmGlobal Global;
Global.Index = NumImportedGlobals + Globals.size();
- Global.Type.Type = readUint8(Ptr);
- Global.Type.Mutable = readVaruint1(Ptr);
- if (Error Err = readInitExpr(Global.InitExpr, Ptr))
+ Global.Type.Type = readUint8(Ctx);
+ Global.Type.Mutable = readVaruint1(Ctx);
+ if (Error Err = readInitExpr(Global.InitExpr, Ctx))
return Err;
Globals.push_back(Global);
}
- if (Ptr != End)
+ if (Ctx.Ptr != Ctx.End)
return make_error<GenericBinaryError>("Global section ended prematurely",
object_error::parse_failed);
return Error::success();
}
-Error WasmObjectFile::parseExportSection(const uint8_t *Ptr, const uint8_t *End) {
- uint32_t Count = readVaruint32(Ptr);
+Error WasmObjectFile::parseExportSection(ReadContext &Ctx) {
+ uint32_t Count = readVaruint32(Ctx);
Exports.reserve(Count);
for (uint32_t i = 0; i < Count; i++) {
wasm::WasmExport Ex;
- Ex.Name = readString(Ptr);
- Ex.Kind = readUint8(Ptr);
- Ex.Index = readVaruint32(Ptr);
+ Ex.Name = readString(Ctx);
+ Ex.Kind = readUint8(Ctx);
+ Ex.Index = readVaruint32(Ctx);
switch (Ex.Kind) {
case wasm::WASM_EXTERNAL_FUNCTION:
if (!isValidFunctionIndex(Ex.Index))
}
Exports.push_back(Ex);
}
- if (Ptr != End)
+ if (Ctx.Ptr != Ctx.End)
return make_error<GenericBinaryError>("Export section ended prematurely",
object_error::parse_failed);
return Error::success();
return Index < Symbols.size() && Symbols[Index].isTypeData();
}
+bool WasmObjectFile::isValidSectionSymbol(uint32_t Index) const {
+ return Index < Symbols.size() && Symbols[Index].isTypeSection();
+}
+
wasm::WasmFunction &WasmObjectFile::getDefinedFunction(uint32_t Index) {
assert(isDefinedFunctionIndex(Index));
return Functions[Index - NumImportedFunctions];
return Globals[Index - NumImportedGlobals];
}
-Error WasmObjectFile::parseStartSection(const uint8_t *Ptr, const uint8_t *End) {
- StartFunction = readVaruint32(Ptr);
+Error WasmObjectFile::parseStartSection(ReadContext &Ctx) {
+ StartFunction = readVaruint32(Ctx);
if (!isValidFunctionIndex(StartFunction))
return make_error<GenericBinaryError>("Invalid start function",
object_error::parse_failed);
return Error::success();
}
-Error WasmObjectFile::parseCodeSection(const uint8_t *Ptr, const uint8_t *End) {
+Error WasmObjectFile::parseCodeSection(ReadContext &Ctx) {
CodeSection = Sections.size();
- const uint8_t *CodeSectionStart = Ptr;
- uint32_t FunctionCount = readVaruint32(Ptr);
+ uint32_t FunctionCount = readVaruint32(Ctx);
if (FunctionCount != FunctionTypes.size()) {
return make_error<GenericBinaryError>("Invalid function count",
object_error::parse_failed);
while (FunctionCount--) {
wasm::WasmFunction Function;
- const uint8_t *FunctionStart = Ptr;
- uint32_t Size = readVaruint32(Ptr);
- const uint8_t *FunctionEnd = Ptr + Size;
+ const uint8_t *FunctionStart = Ctx.Ptr;
+ uint32_t Size = readVaruint32(Ctx);
+ const uint8_t *FunctionEnd = Ctx.Ptr + Size;
+ Function.CodeOffset = Ctx.Ptr - FunctionStart;
Function.Index = NumImportedFunctions + Functions.size();
- Function.CodeSectionOffset = FunctionStart - CodeSectionStart;
+ Function.CodeSectionOffset = FunctionStart - Ctx.Start;
Function.Size = FunctionEnd - FunctionStart;
- uint32_t NumLocalDecls = readVaruint32(Ptr);
+ uint32_t NumLocalDecls = readVaruint32(Ctx);
Function.Locals.reserve(NumLocalDecls);
while (NumLocalDecls--) {
wasm::WasmLocalDecl Decl;
- Decl.Count = readVaruint32(Ptr);
- Decl.Type = readUint8(Ptr);
+ Decl.Count = readVaruint32(Ctx);
+ Decl.Type = readUint8(Ctx);
Function.Locals.push_back(Decl);
}
- uint32_t BodySize = FunctionEnd - Ptr;
- Function.Body = ArrayRef<uint8_t>(Ptr, BodySize);
- Ptr += BodySize;
- assert(Ptr == FunctionEnd);
+ uint32_t BodySize = FunctionEnd - Ctx.Ptr;
+ Function.Body = ArrayRef<uint8_t>(Ctx.Ptr, BodySize);
+ // This will be set later when reading in the linking metadata section.
+ Function.Comdat = UINT32_MAX;
+ Ctx.Ptr += BodySize;
+ assert(Ctx.Ptr == FunctionEnd);
Functions.push_back(Function);
}
- if (Ptr != End)
+ if (Ctx.Ptr != Ctx.End)
return make_error<GenericBinaryError>("Code section ended prematurely",
object_error::parse_failed);
return Error::success();
}
-Error WasmObjectFile::parseElemSection(const uint8_t *Ptr, const uint8_t *End) {
- uint32_t Count = readVaruint32(Ptr);
+Error WasmObjectFile::parseElemSection(ReadContext &Ctx) {
+ uint32_t Count = readVaruint32(Ctx);
ElemSegments.reserve(Count);
while (Count--) {
wasm::WasmElemSegment Segment;
- Segment.TableIndex = readVaruint32(Ptr);
+ Segment.TableIndex = readVaruint32(Ctx);
if (Segment.TableIndex != 0) {
return make_error<GenericBinaryError>("Invalid TableIndex",
object_error::parse_failed);
}
- if (Error Err = readInitExpr(Segment.Offset, Ptr))
+ if (Error Err = readInitExpr(Segment.Offset, Ctx))
return Err;
- uint32_t NumElems = readVaruint32(Ptr);
+ uint32_t NumElems = readVaruint32(Ctx);
while (NumElems--) {
- Segment.Functions.push_back(readVaruint32(Ptr));
+ Segment.Functions.push_back(readVaruint32(Ctx));
}
ElemSegments.push_back(Segment);
}
- if (Ptr != End)
+ if (Ctx.Ptr != Ctx.End)
return make_error<GenericBinaryError>("Elem section ended prematurely",
object_error::parse_failed);
return Error::success();
}
-Error WasmObjectFile::parseDataSection(const uint8_t *Ptr, const uint8_t *End) {
+Error WasmObjectFile::parseDataSection(ReadContext &Ctx) {
DataSection = Sections.size();
- const uint8_t *Start = Ptr;
- uint32_t Count = readVaruint32(Ptr);
+ uint32_t Count = readVaruint32(Ctx);
DataSegments.reserve(Count);
while (Count--) {
WasmSegment Segment;
- Segment.Data.MemoryIndex = readVaruint32(Ptr);
- if (Error Err = readInitExpr(Segment.Data.Offset, Ptr))
+ Segment.Data.MemoryIndex = readVaruint32(Ctx);
+ if (Error Err = readInitExpr(Segment.Data.Offset, Ctx))
return Err;
- uint32_t Size = readVaruint32(Ptr);
- Segment.Data.Content = ArrayRef<uint8_t>(Ptr, Size);
+ uint32_t Size = readVaruint32(Ctx);
+ if (Size > (uint32_t) (Ctx.End - Ctx.Ptr))
+ return make_error<GenericBinaryError>("Invalid segment size",
+ object_error::parse_failed);
+ Segment.Data.Content = ArrayRef<uint8_t>(Ctx.Ptr, Size);
+ // The rest of these Data fields are set later, when reading in the linking
+ // metadata section.
Segment.Data.Alignment = 0;
Segment.Data.Flags = 0;
- Segment.SectionOffset = Ptr - Start;
- Ptr += Size;
+ Segment.Data.Comdat = UINT32_MAX;
+ Segment.SectionOffset = Ctx.Ptr - Ctx.Start;
+ Ctx.Ptr += Size;
DataSegments.push_back(Segment);
}
- if (Ptr != End)
+ if (Ctx.Ptr != Ctx.End)
return make_error<GenericBinaryError>("Data section ended prematurely",
object_error::parse_failed);
return Error::success();
}
const uint8_t *WasmObjectFile::getPtr(size_t Offset) const {
- return reinterpret_cast<const uint8_t *>(getData().substr(Offset, 1).data());
+ return reinterpret_cast<const uint8_t *>(getData().data() + Offset);
}
const wasm::WasmObjectHeader &WasmObjectFile::getHeader() const {
uint32_t Result = SymbolRef::SF_None;
const WasmSymbol &Sym = getWasmSymbol(Symb);
- DEBUG(dbgs() << "getSymbolFlags: ptr=" << &Sym << " " << Sym << "\n");
+ LLVM_DEBUG(dbgs() << "getSymbolFlags: ptr=" << &Sym << " " << Sym << "\n");
if (Sym.isBindingWeak())
Result |= SymbolRef::SF_Weak;
if (!Sym.isBindingLocal())
assert(Segment.Offset.Opcode == wasm::WASM_OPCODE_I32_CONST);
return Segment.Offset.Value.Int32 + Sym.Info.DataRef.Offset;
}
+ case wasm::WASM_SYMBOL_TYPE_SECTION:
+ return 0;
}
llvm_unreachable("invalid symbol type");
}
return SymbolRef::ST_Other;
case wasm::WASM_SYMBOL_TYPE_DATA:
return SymbolRef::ST_Data;
+ case wasm::WASM_SYMBOL_TYPE_SECTION:
+ return SymbolRef::ST_Debug;
}
llvm_unreachable("Unknown WasmSymbol::SymbolType");
case wasm::WASM_SYMBOL_TYPE_DATA:
Ref.d.a = DataSection;
break;
+ case wasm::WASM_SYMBOL_TYPE_SECTION: {
+ Ref.d.a = Sym.Info.ElementIndex;
+ break;
+ }
default:
llvm_unreachable("Unknown WasmSymbol::SymbolType");
}
return Rel.Offset;
}
-symbol_iterator WasmObjectFile::getRelocationSymbol(DataRefImpl Rel) const {
- llvm_unreachable("not yet implemented");
- SymbolRef Ref;
- return symbol_iterator(Ref);
+symbol_iterator WasmObjectFile::getRelocationSymbol(DataRefImpl Ref) const {
+ const wasm::WasmRelocation &Rel = getWasmRelocation(Ref);
+ if (Rel.Type == wasm::R_WEBASSEMBLY_TYPE_INDEX_LEB)
+ return symbol_end();
+ DataRefImpl Sym;
+ Sym.d.a = Rel.Index;
+ Sym.d.b = 0;
+ return symbol_iterator(SymbolRef(Sym, this));
}
uint64_t WasmObjectFile::getRelocationType(DataRefImpl Ref) const {
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