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-rw-r--r--lld/wasm/InputChunks.cpp290
1 files changed, 145 insertions, 145 deletions
diff --git a/lld/wasm/InputChunks.cpp b/lld/wasm/InputChunks.cpp
index cb62f96c35b..d37b58a5dee 100644
--- a/lld/wasm/InputChunks.cpp
+++ b/lld/wasm/InputChunks.cpp
@@ -22,8 +22,8 @@ using namespace llvm::support::endian;
using namespace lld;
using namespace lld::wasm;
-StringRef lld::relocTypeToString(uint8_t RelocType) {
- switch (RelocType) {
+StringRef lld::relocTypeToString(uint8_t relocType) {
+ switch (relocType) {
#define WASM_RELOC(NAME, REL) \
case REL: \
return #NAME;
@@ -33,67 +33,67 @@ StringRef lld::relocTypeToString(uint8_t RelocType) {
llvm_unreachable("unknown reloc type");
}
-std::string lld::toString(const InputChunk *C) {
- return (toString(C->File) + ":(" + C->getName() + ")").str();
+std::string lld::toString(const InputChunk *c) {
+ return (toString(c->file) + ":(" + c->getName() + ")").str();
}
StringRef InputChunk::getComdatName() const {
- uint32_t Index = getComdat();
- if (Index == UINT32_MAX)
+ uint32_t index = getComdat();
+ if (index == UINT32_MAX)
return StringRef();
- return File->getWasmObj()->linkingData().Comdats[Index];
+ return file->getWasmObj()->linkingData().Comdats[index];
}
void InputChunk::verifyRelocTargets() const {
- for (const WasmRelocation &Rel : Relocations) {
- uint32_t ExistingValue;
- unsigned BytesRead = 0;
- uint32_t Offset = Rel.Offset - getInputSectionOffset();
- const uint8_t *Loc = data().data() + Offset;
- switch (Rel.Type) {
+ for (const WasmRelocation &rel : relocations) {
+ uint32_t existingValue;
+ unsigned bytesRead = 0;
+ uint32_t offset = rel.Offset - getInputSectionOffset();
+ const uint8_t *loc = data().data() + offset;
+ switch (rel.Type) {
case R_WASM_TYPE_INDEX_LEB:
case R_WASM_FUNCTION_INDEX_LEB:
case R_WASM_GLOBAL_INDEX_LEB:
case R_WASM_EVENT_INDEX_LEB:
case R_WASM_MEMORY_ADDR_LEB:
- ExistingValue = decodeULEB128(Loc, &BytesRead);
+ existingValue = decodeULEB128(loc, &bytesRead);
break;
case R_WASM_TABLE_INDEX_SLEB:
case R_WASM_TABLE_INDEX_REL_SLEB:
case R_WASM_MEMORY_ADDR_SLEB:
case R_WASM_MEMORY_ADDR_REL_SLEB:
- ExistingValue = static_cast<uint32_t>(decodeSLEB128(Loc, &BytesRead));
+ existingValue = static_cast<uint32_t>(decodeSLEB128(loc, &bytesRead));
break;
case R_WASM_TABLE_INDEX_I32:
case R_WASM_MEMORY_ADDR_I32:
case R_WASM_FUNCTION_OFFSET_I32:
case R_WASM_SECTION_OFFSET_I32:
- ExistingValue = static_cast<uint32_t>(read32le(Loc));
+ existingValue = static_cast<uint32_t>(read32le(loc));
break;
default:
llvm_unreachable("unknown relocation type");
}
- if (BytesRead && BytesRead != 5)
+ if (bytesRead && bytesRead != 5)
warn("expected LEB at relocation site be 5-byte padded");
- if (Rel.Type != R_WASM_GLOBAL_INDEX_LEB) {
- uint32_t ExpectedValue = File->calcExpectedValue(Rel);
- if (ExpectedValue != ExistingValue)
- warn("unexpected existing value for " + relocTypeToString(Rel.Type) +
- ": existing=" + Twine(ExistingValue) +
- " expected=" + Twine(ExpectedValue));
+ if (rel.Type != R_WASM_GLOBAL_INDEX_LEB) {
+ uint32_t expectedValue = file->calcExpectedValue(rel);
+ if (expectedValue != existingValue)
+ warn("unexpected existing value for " + relocTypeToString(rel.Type) +
+ ": existing=" + Twine(existingValue) +
+ " expected=" + Twine(expectedValue));
}
}
}
// Copy this input chunk to an mmap'ed output file and apply relocations.
-void InputChunk::writeTo(uint8_t *Buf) const {
+void InputChunk::writeTo(uint8_t *buf) const {
// Copy contents
- memcpy(Buf + OutputOffset, data().data(), data().size());
+ memcpy(buf + outputOffset, data().data(), data().size());
// Apply relocations
- if (Relocations.empty())
+ if (relocations.empty())
return;
#ifndef NDEBUG
@@ -101,38 +101,38 @@ void InputChunk::writeTo(uint8_t *Buf) const {
#endif
LLVM_DEBUG(dbgs() << "applying relocations: " << getName()
- << " count=" << Relocations.size() << "\n");
- int32_t Off = OutputOffset - getInputSectionOffset();
-
- for (const WasmRelocation &Rel : Relocations) {
- uint8_t *Loc = Buf + Rel.Offset + Off;
- uint32_t Value = File->calcNewValue(Rel);
- LLVM_DEBUG(dbgs() << "apply reloc: type=" << relocTypeToString(Rel.Type));
- if (Rel.Type != R_WASM_TYPE_INDEX_LEB)
- LLVM_DEBUG(dbgs() << " sym=" << File->getSymbols()[Rel.Index]->getName());
- LLVM_DEBUG(dbgs() << " addend=" << Rel.Addend << " index=" << Rel.Index
- << " value=" << Value << " offset=" << Rel.Offset
+ << " count=" << relocations.size() << "\n");
+ int32_t off = outputOffset - getInputSectionOffset();
+
+ for (const WasmRelocation &rel : relocations) {
+ uint8_t *loc = buf + rel.Offset + off;
+ uint32_t value = file->calcNewValue(rel);
+ LLVM_DEBUG(dbgs() << "apply reloc: type=" << relocTypeToString(rel.Type));
+ if (rel.Type != R_WASM_TYPE_INDEX_LEB)
+ LLVM_DEBUG(dbgs() << " sym=" << file->getSymbols()[rel.Index]->getName());
+ LLVM_DEBUG(dbgs() << " addend=" << rel.Addend << " index=" << rel.Index
+ << " value=" << value << " offset=" << rel.Offset
<< "\n");
- switch (Rel.Type) {
+ switch (rel.Type) {
case R_WASM_TYPE_INDEX_LEB:
case R_WASM_FUNCTION_INDEX_LEB:
case R_WASM_GLOBAL_INDEX_LEB:
case R_WASM_EVENT_INDEX_LEB:
case R_WASM_MEMORY_ADDR_LEB:
- encodeULEB128(Value, Loc, 5);
+ encodeULEB128(value, loc, 5);
break;
case R_WASM_TABLE_INDEX_SLEB:
case R_WASM_TABLE_INDEX_REL_SLEB:
case R_WASM_MEMORY_ADDR_SLEB:
case R_WASM_MEMORY_ADDR_REL_SLEB:
- encodeSLEB128(static_cast<int32_t>(Value), Loc, 5);
+ encodeSLEB128(static_cast<int32_t>(value), loc, 5);
break;
case R_WASM_TABLE_INDEX_I32:
case R_WASM_MEMORY_ADDR_I32:
case R_WASM_FUNCTION_OFFSET_I32:
case R_WASM_SECTION_OFFSET_I32:
- write32le(Loc, Value);
+ write32le(loc, value);
break;
default:
llvm_unreachable("unknown relocation type");
@@ -143,59 +143,59 @@ void InputChunk::writeTo(uint8_t *Buf) const {
// Copy relocation entries to a given output stream.
// This function is used only when a user passes "-r". For a regular link,
// we consume relocations instead of copying them to an output file.
-void InputChunk::writeRelocations(raw_ostream &OS) const {
- if (Relocations.empty())
+void InputChunk::writeRelocations(raw_ostream &os) const {
+ if (relocations.empty())
return;
- int32_t Off = OutputOffset - getInputSectionOffset();
- LLVM_DEBUG(dbgs() << "writeRelocations: " << File->getName()
- << " offset=" << Twine(Off) << "\n");
+ int32_t off = outputOffset - getInputSectionOffset();
+ LLVM_DEBUG(dbgs() << "writeRelocations: " << file->getName()
+ << " offset=" << Twine(off) << "\n");
- for (const WasmRelocation &Rel : Relocations) {
- writeUleb128(OS, Rel.Type, "reloc type");
- writeUleb128(OS, Rel.Offset + Off, "reloc offset");
- writeUleb128(OS, File->calcNewIndex(Rel), "reloc index");
+ for (const WasmRelocation &rel : relocations) {
+ writeUleb128(os, rel.Type, "reloc type");
+ writeUleb128(os, rel.Offset + off, "reloc offset");
+ writeUleb128(os, file->calcNewIndex(rel), "reloc index");
- if (relocTypeHasAddend(Rel.Type))
- writeSleb128(OS, File->calcNewAddend(Rel), "reloc addend");
+ if (relocTypeHasAddend(rel.Type))
+ writeSleb128(os, file->calcNewAddend(rel), "reloc addend");
}
}
-void InputFunction::setFunctionIndex(uint32_t Index) {
+void InputFunction::setFunctionIndex(uint32_t index) {
LLVM_DEBUG(dbgs() << "InputFunction::setFunctionIndex: " << getName()
- << " -> " << Index << "\n");
+ << " -> " << index << "\n");
assert(!hasFunctionIndex());
- FunctionIndex = Index;
+ functionIndex = index;
}
-void InputFunction::setTableIndex(uint32_t Index) {
+void InputFunction::setTableIndex(uint32_t index) {
LLVM_DEBUG(dbgs() << "InputFunction::setTableIndex: " << getName() << " -> "
- << Index << "\n");
+ << index << "\n");
assert(!hasTableIndex());
- TableIndex = Index;
+ tableIndex = index;
}
// Write a relocation value without padding and return the number of bytes
// witten.
-static unsigned writeCompressedReloc(uint8_t *Buf, const WasmRelocation &Rel,
- uint32_t Value) {
- switch (Rel.Type) {
+static unsigned writeCompressedReloc(uint8_t *buf, const WasmRelocation &rel,
+ uint32_t value) {
+ switch (rel.Type) {
case R_WASM_TYPE_INDEX_LEB:
case R_WASM_FUNCTION_INDEX_LEB:
case R_WASM_GLOBAL_INDEX_LEB:
case R_WASM_EVENT_INDEX_LEB:
case R_WASM_MEMORY_ADDR_LEB:
- return encodeULEB128(Value, Buf);
+ return encodeULEB128(value, buf);
case R_WASM_TABLE_INDEX_SLEB:
case R_WASM_MEMORY_ADDR_SLEB:
- return encodeSLEB128(static_cast<int32_t>(Value), Buf);
+ return encodeSLEB128(static_cast<int32_t>(value), buf);
default:
llvm_unreachable("unexpected relocation type");
}
}
-static unsigned getRelocWidthPadded(const WasmRelocation &Rel) {
- switch (Rel.Type) {
+static unsigned getRelocWidthPadded(const WasmRelocation &rel) {
+ switch (rel.Type) {
case R_WASM_TYPE_INDEX_LEB:
case R_WASM_FUNCTION_INDEX_LEB:
case R_WASM_GLOBAL_INDEX_LEB:
@@ -209,9 +209,9 @@ static unsigned getRelocWidthPadded(const WasmRelocation &Rel) {
}
}
-static unsigned getRelocWidth(const WasmRelocation &Rel, uint32_t Value) {
- uint8_t Buf[5];
- return writeCompressedReloc(Buf, Rel, Value);
+static unsigned getRelocWidth(const WasmRelocation &rel, uint32_t value) {
+ uint8_t buf[5];
+ return writeCompressedReloc(buf, rel, value);
}
// Relocations of type LEB and SLEB in the code section are padded to 5 bytes
@@ -225,124 +225,124 @@ static unsigned getRelocWidth(const WasmRelocation &Rel, uint32_t Value) {
// This function only computes the final output size. It must be called
// before getSize() is used to calculate of layout of the code section.
void InputFunction::calculateSize() {
- if (!File || !Config->CompressRelocations)
+ if (!file || !config->compressRelocations)
return;
LLVM_DEBUG(dbgs() << "calculateSize: " << getName() << "\n");
- const uint8_t *SecStart = File->CodeSection->Content.data();
- const uint8_t *FuncStart = SecStart + getInputSectionOffset();
- uint32_t FunctionSizeLength;
- decodeULEB128(FuncStart, &FunctionSizeLength);
+ const uint8_t *secStart = file->codeSection->Content.data();
+ const uint8_t *funcStart = secStart + getInputSectionOffset();
+ uint32_t functionSizeLength;
+ decodeULEB128(funcStart, &functionSizeLength);
- uint32_t Start = getInputSectionOffset();
- uint32_t End = Start + Function->Size;
+ uint32_t start = getInputSectionOffset();
+ uint32_t end = start + function->Size;
- uint32_t LastRelocEnd = Start + FunctionSizeLength;
- for (const WasmRelocation &Rel : Relocations) {
- LLVM_DEBUG(dbgs() << " region: " << (Rel.Offset - LastRelocEnd) << "\n");
- CompressedFuncSize += Rel.Offset - LastRelocEnd;
- CompressedFuncSize += getRelocWidth(Rel, File->calcNewValue(Rel));
- LastRelocEnd = Rel.Offset + getRelocWidthPadded(Rel);
+ uint32_t lastRelocEnd = start + functionSizeLength;
+ for (const WasmRelocation &rel : relocations) {
+ LLVM_DEBUG(dbgs() << " region: " << (rel.Offset - lastRelocEnd) << "\n");
+ compressedFuncSize += rel.Offset - lastRelocEnd;
+ compressedFuncSize += getRelocWidth(rel, file->calcNewValue(rel));
+ lastRelocEnd = rel.Offset + getRelocWidthPadded(rel);
}
- LLVM_DEBUG(dbgs() << " final region: " << (End - LastRelocEnd) << "\n");
- CompressedFuncSize += End - LastRelocEnd;
+ LLVM_DEBUG(dbgs() << " final region: " << (end - lastRelocEnd) << "\n");
+ compressedFuncSize += end - lastRelocEnd;
// Now we know how long the resulting function is we can add the encoding
// of its length
- uint8_t Buf[5];
- CompressedSize = CompressedFuncSize + encodeULEB128(CompressedFuncSize, Buf);
+ uint8_t buf[5];
+ compressedSize = compressedFuncSize + encodeULEB128(compressedFuncSize, buf);
- LLVM_DEBUG(dbgs() << " calculateSize orig: " << Function->Size << "\n");
- LLVM_DEBUG(dbgs() << " calculateSize new: " << CompressedSize << "\n");
+ LLVM_DEBUG(dbgs() << " calculateSize orig: " << function->Size << "\n");
+ LLVM_DEBUG(dbgs() << " calculateSize new: " << compressedSize << "\n");
}
// Override the default writeTo method so that we can (optionally) write the
// compressed version of the function.
-void InputFunction::writeTo(uint8_t *Buf) const {
- if (!File || !Config->CompressRelocations)
- return InputChunk::writeTo(Buf);
+void InputFunction::writeTo(uint8_t *buf) const {
+ if (!file || !config->compressRelocations)
+ return InputChunk::writeTo(buf);
- Buf += OutputOffset;
- uint8_t *Orig = Buf;
- (void)Orig;
+ buf += outputOffset;
+ uint8_t *orig = buf;
+ (void)orig;
- const uint8_t *SecStart = File->CodeSection->Content.data();
- const uint8_t *FuncStart = SecStart + getInputSectionOffset();
- const uint8_t *End = FuncStart + Function->Size;
- uint32_t Count;
- decodeULEB128(FuncStart, &Count);
- FuncStart += Count;
+ const uint8_t *secStart = file->codeSection->Content.data();
+ const uint8_t *funcStart = secStart + getInputSectionOffset();
+ const uint8_t *end = funcStart + function->Size;
+ uint32_t count;
+ decodeULEB128(funcStart, &count);
+ funcStart += count;
LLVM_DEBUG(dbgs() << "write func: " << getName() << "\n");
- Buf += encodeULEB128(CompressedFuncSize, Buf);
- const uint8_t *LastRelocEnd = FuncStart;
- for (const WasmRelocation &Rel : Relocations) {
- unsigned ChunkSize = (SecStart + Rel.Offset) - LastRelocEnd;
- LLVM_DEBUG(dbgs() << " write chunk: " << ChunkSize << "\n");
- memcpy(Buf, LastRelocEnd, ChunkSize);
- Buf += ChunkSize;
- Buf += writeCompressedReloc(Buf, Rel, File->calcNewValue(Rel));
- LastRelocEnd = SecStart + Rel.Offset + getRelocWidthPadded(Rel);
+ buf += encodeULEB128(compressedFuncSize, buf);
+ const uint8_t *lastRelocEnd = funcStart;
+ for (const WasmRelocation &rel : relocations) {
+ unsigned chunkSize = (secStart + rel.Offset) - lastRelocEnd;
+ LLVM_DEBUG(dbgs() << " write chunk: " << chunkSize << "\n");
+ memcpy(buf, lastRelocEnd, chunkSize);
+ buf += chunkSize;
+ buf += writeCompressedReloc(buf, rel, file->calcNewValue(rel));
+ lastRelocEnd = secStart + rel.Offset + getRelocWidthPadded(rel);
}
- unsigned ChunkSize = End - LastRelocEnd;
- LLVM_DEBUG(dbgs() << " write final chunk: " << ChunkSize << "\n");
- memcpy(Buf, LastRelocEnd, ChunkSize);
- LLVM_DEBUG(dbgs() << " total: " << (Buf + ChunkSize - Orig) << "\n");
+ unsigned chunkSize = end - lastRelocEnd;
+ LLVM_DEBUG(dbgs() << " write final chunk: " << chunkSize << "\n");
+ memcpy(buf, lastRelocEnd, chunkSize);
+ LLVM_DEBUG(dbgs() << " total: " << (buf + chunkSize - orig) << "\n");
}
// Generate code to apply relocations to the data section at runtime.
// This is only called when generating shared libaries (PIC) where address are
// not known at static link time.
-void InputSegment::generateRelocationCode(raw_ostream &OS) const {
+void InputSegment::generateRelocationCode(raw_ostream &os) const {
LLVM_DEBUG(dbgs() << "generating runtime relocations: " << getName()
- << " count=" << Relocations.size() << "\n");
+ << " count=" << relocations.size() << "\n");
// TODO(sbc): Encode the relocations in the data section and write a loop
// here to apply them.
- uint32_t SegmentVA = OutputSeg->StartVA + OutputSegmentOffset;
- for (const WasmRelocation &Rel : Relocations) {
- uint32_t Offset = Rel.Offset - getInputSectionOffset();
- uint32_t OutputOffset = SegmentVA + Offset;
+ uint32_t segmentVA = outputSeg->startVA + outputSegmentOffset;
+ for (const WasmRelocation &rel : relocations) {
+ uint32_t offset = rel.Offset - getInputSectionOffset();
+ uint32_t outputOffset = segmentVA + offset;
- LLVM_DEBUG(dbgs() << "gen reloc: type=" << relocTypeToString(Rel.Type)
- << " addend=" << Rel.Addend << " index=" << Rel.Index
- << " output offset=" << OutputOffset << "\n");
+ LLVM_DEBUG(dbgs() << "gen reloc: type=" << relocTypeToString(rel.Type)
+ << " addend=" << rel.Addend << " index=" << rel.Index
+ << " output offset=" << outputOffset << "\n");
// Get __memory_base
- writeU8(OS, WASM_OPCODE_GLOBAL_GET, "GLOBAL_GET");
- writeUleb128(OS, WasmSym::MemoryBase->getGlobalIndex(), "memory_base");
+ writeU8(os, WASM_OPCODE_GLOBAL_GET, "GLOBAL_GET");
+ writeUleb128(os, WasmSym::memoryBase->getGlobalIndex(), "memory_base");
// Add the offset of the relocation
- writeU8(OS, WASM_OPCODE_I32_CONST, "I32_CONST");
- writeSleb128(OS, OutputOffset, "offset");
- writeU8(OS, WASM_OPCODE_I32_ADD, "ADD");
+ writeU8(os, WASM_OPCODE_I32_CONST, "I32_CONST");
+ writeSleb128(os, outputOffset, "offset");
+ writeU8(os, WASM_OPCODE_I32_ADD, "ADD");
- Symbol *Sym = File->getSymbol(Rel);
+ Symbol *sym = file->getSymbol(rel);
// Now figure out what we want to store
- if (Sym->hasGOTIndex()) {
- writeU8(OS, WASM_OPCODE_GLOBAL_GET, "GLOBAL_GET");
- writeUleb128(OS, Sym->getGOTIndex(), "global index");
- if (Rel.Addend) {
- writeU8(OS, WASM_OPCODE_I32_CONST, "CONST");
- writeSleb128(OS, Rel.Addend, "addend");
- writeU8(OS, WASM_OPCODE_I32_ADD, "ADD");
+ if (sym->hasGOTIndex()) {
+ writeU8(os, WASM_OPCODE_GLOBAL_GET, "GLOBAL_GET");
+ writeUleb128(os, sym->getGOTIndex(), "global index");
+ if (rel.Addend) {
+ writeU8(os, WASM_OPCODE_I32_CONST, "CONST");
+ writeSleb128(os, rel.Addend, "addend");
+ writeU8(os, WASM_OPCODE_I32_ADD, "ADD");
}
} else {
- const GlobalSymbol* BaseSymbol = WasmSym::MemoryBase;
- if (Rel.Type == R_WASM_TABLE_INDEX_I32)
- BaseSymbol = WasmSym::TableBase;
- writeU8(OS, WASM_OPCODE_GLOBAL_GET, "GLOBAL_GET");
- writeUleb128(OS, BaseSymbol->getGlobalIndex(), "base");
- writeU8(OS, WASM_OPCODE_I32_CONST, "CONST");
- writeSleb128(OS, File->calcNewValue(Rel), "offset");
- writeU8(OS, WASM_OPCODE_I32_ADD, "ADD");
+ const GlobalSymbol* baseSymbol = WasmSym::memoryBase;
+ if (rel.Type == R_WASM_TABLE_INDEX_I32)
+ baseSymbol = WasmSym::tableBase;
+ writeU8(os, WASM_OPCODE_GLOBAL_GET, "GLOBAL_GET");
+ writeUleb128(os, baseSymbol->getGlobalIndex(), "base");
+ writeU8(os, WASM_OPCODE_I32_CONST, "CONST");
+ writeSleb128(os, file->calcNewValue(rel), "offset");
+ writeU8(os, WASM_OPCODE_I32_ADD, "ADD");
}
// Store that value at the virtual address
- writeU8(OS, WASM_OPCODE_I32_STORE, "I32_STORE");
- writeUleb128(OS, 2, "align");
- writeUleb128(OS, 0, "offset");
+ writeU8(os, WASM_OPCODE_I32_STORE, "I32_STORE");
+ writeUleb128(os, 2, "align");
+ writeUleb128(os, 0, "offset");
}
}
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