//===----------------------------------------------------------------------===//
#include "Disassembler.h"
-
-#include "llvm/ADT/OwningPtr.h"
+#include "llvm/ADT/Triple.h"
#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCDisassembler.h"
#include "llvm/MC/MCInst.h"
-#include "llvm/MC/MCInstPrinter.h"
-#include "llvm/Target/TargetRegistry.h"
+#include "llvm/MC/MCRegisterInfo.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/MemoryObject.h"
-#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/SourceMgr.h"
+#include "llvm/Support/TargetRegistry.h"
+#include "llvm/Support/raw_ostream.h"
+
using namespace llvm;
typedef std::vector<std::pair<unsigned char, const char*> > ByteArrayTy;
const ByteArrayTy &Bytes;
public:
VectorMemoryObject(const ByteArrayTy &bytes) : Bytes(bytes) {}
-
- uint64_t getBase() const { return 0; }
- uint64_t getExtent() const { return Bytes.size(); }
- int readByte(uint64_t Addr, uint8_t *Byte) const {
- if (Addr > getExtent())
+ uint64_t getBase() const override { return 0; }
+ uint64_t getExtent() const override { return Bytes.size(); }
+
+ int readByte(uint64_t Addr, uint8_t *Byte) const override {
+ if (Addr >= getExtent())
return -1;
*Byte = Bytes[Addr].first;
return 0;
}
static bool PrintInsts(const MCDisassembler &DisAsm,
- MCInstPrinter &Printer, const ByteArrayTy &Bytes,
- SourceMgr &SM) {
+ const ByteArrayTy &Bytes,
+ SourceMgr &SM, raw_ostream &Out,
+ MCStreamer &Streamer, bool InAtomicBlock,
+ const MCSubtargetInfo &STI) {
// Wrap the vector in a MemoryObject.
VectorMemoryObject memoryObject(Bytes);
-
+
// Disassemble it to strings.
uint64_t Size;
uint64_t Index;
-
+
for (Index = 0; Index < Bytes.size(); Index += Size) {
MCInst Inst;
-
- if (DisAsm.getInstruction(Inst, Size, memoryObject, Index,
- /*REMOVE*/ nulls())) {
- Printer.printInst(&Inst);
- outs() << "\n";
- }
- else {
+
+ MCDisassembler::DecodeStatus S;
+ S = DisAsm.getInstruction(Inst, Size, memoryObject, Index,
+ /*REMOVE*/ nulls(), nulls());
+ switch (S) {
+ case MCDisassembler::Fail:
SM.PrintMessage(SMLoc::getFromPointer(Bytes[Index].second),
- "invalid instruction encoding", "warning");
+ SourceMgr::DK_Warning,
+ "invalid instruction encoding");
+ // Don't try to resynchronise the stream in a block
+ if (InAtomicBlock)
+ return true;
+
if (Size == 0)
Size = 1; // skip illegible bytes
+
+ break;
+
+ case MCDisassembler::SoftFail:
+ SM.PrintMessage(SMLoc::getFromPointer(Bytes[Index].second),
+ SourceMgr::DK_Warning,
+ "potentially undefined instruction encoding");
+ // Fall through
+
+ case MCDisassembler::Success:
+ Streamer.EmitInstruction(Inst, STI);
+ break;
}
}
-
+
return false;
}
-int Disassembler::disassemble(const Target &T, const std::string &Triple,
- MemoryBuffer &Buffer) {
- // Set up disassembler.
- OwningPtr<const MCAsmInfo> AsmInfo(T.createAsmInfo(Triple));
-
- if (!AsmInfo) {
- errs() << "error: no assembly info for target " << Triple << "\n";
- return -1;
- }
-
- OwningPtr<const MCDisassembler> DisAsm(T.createMCDisassembler());
- if (!DisAsm) {
- errs() << "error: no disassembler for target " << Triple << "\n";
- return -1;
- }
-
- OwningPtr<MCInstPrinter> IP(T.createMCInstPrinter(0, *AsmInfo, outs()));
- if (!IP) {
- errs() << "error: no instruction printer for target " << Triple << '\n';
- return -1;
- }
-
- bool ErrorOccurred = false;
-
- SourceMgr SM;
- SM.AddNewSourceBuffer(&Buffer, SMLoc());
-
- // Convert the input to a vector for disassembly.
- ByteArrayTy ByteArray;
-
- StringRef Str = Buffer.getBuffer();
- while (!Str.empty()) {
- // Strip horizontal whitespace.
- if (size_t Pos = Str.find_first_not_of(" \t\r")) {
+static bool SkipToToken(StringRef &Str) {
+ while (!Str.empty() && Str.find_first_not_of(" \t\r\n#,") != 0) {
+ // Strip horizontal whitespace and commas.
+ if (size_t Pos = Str.find_first_not_of(" \t\r,")) {
Str = Str.substr(Pos);
- continue;
}
-
+
// If this is the end of a line or start of a comment, remove the rest of
// the line.
if (Str[0] == '\n' || Str[0] == '#') {
// Strip to the end of line if we already processed any bytes on this
// line. This strips the comment and/or the \n.
- if (Str[0] == '\n')
+ if (Str[0] == '\n') {
Str = Str.substr(1);
- else {
+ } else {
Str = Str.substr(Str.find_first_of('\n'));
if (!Str.empty())
Str = Str.substr(1);
}
continue;
}
-
+ }
+
+ return !Str.empty();
+}
+
+
+static bool ByteArrayFromString(ByteArrayTy &ByteArray,
+ StringRef &Str,
+ SourceMgr &SM) {
+ while (SkipToToken(Str)) {
+ // Handled by higher level
+ if (Str[0] == '[' || Str[0] == ']')
+ return false;
+
// Get the current token.
- size_t Next = Str.find_first_of(" \t\n\r#");
+ size_t Next = Str.find_first_of(" \t\n\r,#[]");
StringRef Value = Str.substr(0, Next);
-
+
// Convert to a byte and add to the byte vector.
unsigned ByteVal;
if (Value.getAsInteger(0, ByteVal) || ByteVal > 255) {
// If we have an error, print it and skip to the end of line.
- SM.PrintMessage(SMLoc::getFromPointer(Value.data()),
- "invalid input token", "error");
- ErrorOccurred = true;
+ SM.PrintMessage(SMLoc::getFromPointer(Value.data()), SourceMgr::DK_Error,
+ "invalid input token");
Str = Str.substr(Str.find('\n'));
ByteArray.clear();
continue;
}
-
+
ByteArray.push_back(std::make_pair((unsigned char)ByteVal, Value.data()));
Str = Str.substr(Next);
}
-
- if (!ByteArray.empty())
- ErrorOccurred |= PrintInsts(*DisAsm, *IP, ByteArray, SM);
-
+
+ return false;
+}
+
+int Disassembler::disassemble(const Target &T,
+ const std::string &Triple,
+ MCSubtargetInfo &STI,
+ MCStreamer &Streamer,
+ MemoryBuffer &Buffer,
+ SourceMgr &SM,
+ raw_ostream &Out) {
+
+ std::unique_ptr<const MCRegisterInfo> MRI(T.createMCRegInfo(Triple));
+ if (!MRI) {
+ errs() << "error: no register info for target " << Triple << "\n";
+ return -1;
+ }
+
+ std::unique_ptr<const MCAsmInfo> MAI(T.createMCAsmInfo(*MRI, Triple));
+ if (!MAI) {
+ errs() << "error: no assembly info for target " << Triple << "\n";
+ return -1;
+ }
+
+ // Set up the MCContext for creating symbols and MCExpr's.
+ MCContext Ctx(MAI.get(), MRI.get(), nullptr);
+
+ std::unique_ptr<const MCDisassembler> DisAsm(
+ T.createMCDisassembler(STI, Ctx));
+ if (!DisAsm) {
+ errs() << "error: no disassembler for target " << Triple << "\n";
+ return -1;
+ }
+
+ // Set up initial section manually here
+ Streamer.InitSections();
+
+ bool ErrorOccurred = false;
+
+ // Convert the input to a vector for disassembly.
+ ByteArrayTy ByteArray;
+ StringRef Str = Buffer.getBuffer();
+ bool InAtomicBlock = false;
+
+ while (SkipToToken(Str)) {
+ ByteArray.clear();
+
+ if (Str[0] == '[') {
+ if (InAtomicBlock) {
+ SM.PrintMessage(SMLoc::getFromPointer(Str.data()), SourceMgr::DK_Error,
+ "nested atomic blocks make no sense");
+ ErrorOccurred = true;
+ }
+ InAtomicBlock = true;
+ Str = Str.drop_front();
+ continue;
+ } else if (Str[0] == ']') {
+ if (!InAtomicBlock) {
+ SM.PrintMessage(SMLoc::getFromPointer(Str.data()), SourceMgr::DK_Error,
+ "attempt to close atomic block without opening");
+ ErrorOccurred = true;
+ }
+ InAtomicBlock = false;
+ Str = Str.drop_front();
+ continue;
+ }
+
+ // It's a real token, get the bytes and emit them
+ ErrorOccurred |= ByteArrayFromString(ByteArray, Str, SM);
+
+ if (!ByteArray.empty())
+ ErrorOccurred |= PrintInsts(*DisAsm, ByteArray, SM, Out, Streamer,
+ InAtomicBlock, STI);
+ }
+
+ if (InAtomicBlock) {
+ SM.PrintMessage(SMLoc::getFromPointer(Str.data()), SourceMgr::DK_Error,
+ "unclosed atomic block");
+ ErrorOccurred = true;
+ }
+
return ErrorOccurred;
}
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