#include "Disassembler.h"
#include <stdio.h>
#include "llvm-c/Disassembler.h"
#include <string>
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCDisassembler.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCInstPrinter.h"
#include "llvm/MC/MCContext.h"
#include "llvm/Target/TargetRegistry.h"
#include "llvm/Target/TargetAsmInfo.h" // FIXME.
#include "llvm/Target/TargetMachine.h" // FIXME.
#include "llvm/Target/TargetSelect.h"
#include "llvm/Support/MemoryObject.h"
namespace llvm {
class Target;
} using namespace llvm;
#ifdef __cplusplus
extern "C" {
#endif // __cplusplus
LLVMDisasmContextRef LLVMCreateDisasm(const char *TripleName, void *DisInfo,
int TagType, LLVMOpInfoCallback GetOpInfo,
LLVMSymbolLookupCallback SymbolLookUp) {
llvm::InitializeAllTargetInfos();
llvm::InitializeAllTargets();
llvm::InitializeAllAsmPrinters();
llvm::InitializeAllAsmParsers();
llvm::InitializeAllDisassemblers();
std::string Error;
const Target *TheTarget = TargetRegistry::lookupTarget(TripleName, Error);
assert(TheTarget && "Unable to create target!");
const MCAsmInfo *MAI = TheTarget->createAsmInfo(TripleName);
assert(MAI && "Unable to create target asm info!");
std::string FeaturesStr;
TargetMachine *TM = TheTarget->createTargetMachine(TripleName, FeaturesStr);
assert(TM && "Unable to create target machine!");
const TargetAsmInfo *tai = new TargetAsmInfo(*TM);
assert(tai && "Unable to create target assembler!");
MCContext *Ctx = new MCContext(*MAI, tai);
assert(Ctx && "Unable to create MCContext!");
MCDisassembler *DisAsm = TheTarget->createMCDisassembler();
assert(DisAsm && "Unable to create disassembler!");
DisAsm->setupForSymbolicDisassembly(GetOpInfo, DisInfo, Ctx);
int AsmPrinterVariant = MAI->getAssemblerDialect();
MCInstPrinter *IP = TheTarget->createMCInstPrinter(*TM, AsmPrinterVariant,
*MAI);
assert(IP && "Unable to create instruction printer!");
LLVMDisasmContext *DC = new LLVMDisasmContext(TripleName, DisInfo, TagType,
GetOpInfo, SymbolLookUp,
TheTarget, MAI, TM, tai, Ctx,
DisAsm, IP);
assert(DC && "Allocation failure!");
return DC;
}
void LLVMDisasmDispose(LLVMDisasmContextRef DCR){
LLVMDisasmContext *DC = (LLVMDisasmContext *)DCR;
delete DC;
}
namespace {
class DisasmMemoryObject : public MemoryObject {
private:
uint8_t *Bytes;
uint64_t Size;
uint64_t BasePC;
public:
DisasmMemoryObject(uint8_t *bytes, uint64_t size, uint64_t basePC) :
Bytes(bytes), Size(size), BasePC(basePC) {}
uint64_t getBase() const { return BasePC; }
uint64_t getExtent() const { return Size; }
int readByte(uint64_t Addr, uint8_t *Byte) const {
if (Addr - BasePC >= Size)
return -1;
*Byte = Bytes[Addr - BasePC];
return 0;
}
};
}
size_t LLVMDisasmInstruction(LLVMDisasmContextRef DCR, uint8_t *Bytes,
uint64_t BytesSize, uint64_t PC, char *OutString,
size_t OutStringSize){
LLVMDisasmContext *DC = (LLVMDisasmContext *)DCR;
DisasmMemoryObject MemoryObject(Bytes, BytesSize, PC);
uint64_t Size;
MCInst Inst;
const MCDisassembler *DisAsm = DC->getDisAsm();
MCInstPrinter *IP = DC->getIP();
if (!DisAsm->getInstruction(Inst, Size, MemoryObject, PC, nulls()))
return 0;
std::string InsnStr;
raw_string_ostream OS(InsnStr);
IP->printInst(&Inst, OS);
OS.flush();
size_t OutputSize = std::min(OutStringSize-1, InsnStr.size());
std::memcpy(OutString, InsnStr.data(), OutputSize);
OutString[OutputSize] = '\0';
return Size;
}
#ifdef __cplusplus
}
#endif // __cplusplus