#include <stddef.h>
#include <llvm-c/Core.h>
-#include <llvm/Target/TargetMachine.h>
-#include <llvm/Target/TargetInstrInfo.h>
+#include <llvm-c/Disassembler.h>
#include <llvm/Support/raw_ostream.h>
#include <llvm/Support/Format.h>
-
-#if HAVE_LLVM >= 0x0306
-#include <llvm/Target/TargetSubtargetInfo.h>
-#else
-#include <llvm/Support/MemoryObject.h>
-#endif
-
-#include <llvm/Support/TargetRegistry.h>
-#include <llvm/MC/MCSubtargetInfo.h>
-
#include <llvm/Support/Host.h>
-
#include <llvm/IR/Module.h>
-#include <llvm/MC/MCDisassembler.h>
-#include <llvm/MC/MCAsmInfo.h>
-#include <llvm/MC/MCInst.h>
-#include <llvm/MC/MCInstPrinter.h>
-#include <llvm/MC/MCRegisterInfo.h>
-
-#if HAVE_LLVM >= 0x0305
-#define OwningPtr std::unique_ptr
-#else
-#include <llvm/ADT/OwningPtr.h>
-#endif
-
-#if HAVE_LLVM >= 0x0305
-#include <llvm/MC/MCContext.h>
-#endif
-
#include "util/u_math.h"
#include "util/u_debug.h"
extern "C" void
lp_debug_dump_value(LLVMValueRef value)
{
-#if (defined(PIPE_OS_WINDOWS) && !defined(PIPE_CC_MSVC)) || defined(PIPE_OS_EMBDDED)
+#if (defined(PIPE_OS_WINDOWS) && !defined(PIPE_CC_MSVC)) || defined(PIPE_OS_EMBEDDED)
raw_debug_ostream os;
llvm::unwrap(value)->print(os);
os.flush();
}
-#if HAVE_LLVM < 0x0306
-
-/*
- * MemoryObject wrapper around a buffer of memory, to be used by MC
- * disassembler.
- */
-class BufferMemoryObject:
- public llvm::MemoryObject
+static const char *
+disassemblerSymbolLookupCB(void *DisInfo,
+ uint64_t ReferenceValue,
+ uint64_t *ReferenceType,
+ uint64_t ReferencePC,
+ const char **ReferenceName)
{
-private:
- const uint8_t *Bytes;
- uint64_t Length;
-public:
- BufferMemoryObject(const uint8_t *bytes, uint64_t length) :
- Bytes(bytes), Length(length)
- {
- }
-
- uint64_t getBase() const
- {
- return 0;
- }
-
- uint64_t getExtent() const
- {
- return Length;
- }
-
- int readByte(uint64_t addr, uint8_t *byte) const
- {
- if (addr > getExtent())
- return -1;
- *byte = Bytes[addr];
- return 0;
- }
-};
-
-#endif /* HAVE_LLVM < 0x0306 */
+ // TODO: Maybe this can be used to guess jumps
+ return NULL;
+}
/*
static size_t
disassemble(const void* func, llvm::raw_ostream & Out)
{
- using namespace llvm;
-
const uint8_t *bytes = (const uint8_t *)func;
/*
*/
const uint64_t extent = 96 * 1024;
- uint64_t max_pc = 0;
-
/*
* Initialize all used objects.
*/
- std::string Triple = sys::getDefaultTargetTriple();
-
- std::string Error;
- const Target *T = TargetRegistry::lookupTarget(Triple, Error);
-
-#if HAVE_LLVM >= 0x0304
- OwningPtr<const MCAsmInfo> AsmInfo(T->createMCAsmInfo(*T->createMCRegInfo(Triple), Triple));
-#else
- OwningPtr<const MCAsmInfo> AsmInfo(T->createMCAsmInfo(Triple));
-#endif
-
- if (!AsmInfo) {
- Out << "error: no assembly info for target " << Triple << "\n";
- Out.flush();
- return 0;
- }
-
- unsigned int AsmPrinterVariant = AsmInfo->getAssemblerDialect();
-
- OwningPtr<const MCRegisterInfo> MRI(T->createMCRegInfo(Triple));
- if (!MRI) {
- Out << "error: no register info for target " << Triple.c_str() << "\n";
- Out.flush();
- return 0;
- }
-
- OwningPtr<const MCInstrInfo> MII(T->createMCInstrInfo());
- if (!MII) {
- Out << "error: no instruction info for target " << Triple.c_str() << "\n";
- Out.flush();
- return 0;
- }
+ std::string Triple = llvm::sys::getProcessTriple();
+ LLVMDisasmContextRef D = LLVMCreateDisasm(Triple.c_str(), NULL, 0, NULL, &disassemblerSymbolLookupCB);
+ char outline[1024];
-#if HAVE_LLVM >= 0x0305
- OwningPtr<const MCSubtargetInfo> STI(T->createMCSubtargetInfo(Triple, sys::getHostCPUName(), ""));
- OwningPtr<MCContext> MCCtx(new MCContext(AsmInfo.get(), MRI.get(), 0));
- OwningPtr<const MCDisassembler> DisAsm(T->createMCDisassembler(*STI, *MCCtx));
-#else
- OwningPtr<const MCSubtargetInfo> STI(T->createMCSubtargetInfo(Triple, sys::getHostCPUName(), ""));
- OwningPtr<const MCDisassembler> DisAsm(T->createMCDisassembler(*STI));
-#endif
- if (!DisAsm) {
- Out << "error: no disassembler for target " << Triple << "\n";
- Out.flush();
+ if (!D) {
+ Out << "error: couldn't create disassembler for triple " << Triple << "\n";
return 0;
}
-
-#if HAVE_LLVM >= 0x0307
- OwningPtr<MCInstPrinter> Printer(
- T->createMCInstPrinter(llvm::Triple(Triple), AsmPrinterVariant, *AsmInfo, *MII, *MRI));
-#else
- OwningPtr<MCInstPrinter> Printer(
- T->createMCInstPrinter(AsmPrinterVariant, *AsmInfo, *MII, *MRI, *STI));
-#endif
- if (!Printer) {
- Out << "error: no instruction printer for target " << Triple.c_str() << "\n";
- Out.flush();
- return 0;
- }
-
- TargetOptions options;
-#if defined(DEBUG) && HAVE_LLVM < 0x0307
- options.JITEmitDebugInfo = true;
-#endif
-#if defined(PIPE_ARCH_X86)
- options.StackAlignmentOverride = 4;
-#endif
-#if defined(DEBUG) || defined(PROFILE)
-#if HAVE_LLVM < 0x0307
- options.NoFramePointerElim = true;
-#endif
-#endif
- OwningPtr<TargetMachine> TM(T->createTargetMachine(Triple, sys::getHostCPUName(), "", options));
-
- /*
- * Wrap the data in a MemoryObject
- */
-#if HAVE_LLVM >= 0x0306
- ArrayRef<uint8_t> memoryObject((const uint8_t *)bytes, extent);
-#else
- BufferMemoryObject memoryObject((const uint8_t *)bytes, extent);
-#endif
-
uint64_t pc;
pc = 0;
- while (true) {
- MCInst Inst;
- uint64_t Size;
+ while (pc < extent) {
+ size_t Size;
/*
* Print address. We use addresses relative to the start of the function,
Out << llvm::format("%6lu:\t", (unsigned long)pc);
- if (!DisAsm->getInstruction(Inst, Size, memoryObject,
- pc,
- nulls(), nulls())) {
- Out << "invalid";
+ Size = LLVMDisasmInstruction(D, (uint8_t *)bytes + pc, extent - pc, 0, outline,
+ sizeof outline);
+
+ if (!Size) {
+ Out << "invalid\n";
pc += 1;
+ break;
}
/*
if (0) {
unsigned i;
for (i = 0; i < Size; ++i) {
- Out << llvm::format("%02x ", ((const uint8_t*)bytes)[pc + i]);
+ Out << llvm::format("%02x ", bytes[pc + i]);
}
for (; i < 16; ++i) {
Out << " ";
/*
* Print the instruction.
*/
-#if HAVE_LLVM >= 0x0307
- Printer->printInst(&Inst, Out, "", *STI);
-#else
- Printer->printInst(&Inst, Out, "");
-#endif
- /*
- * Advance.
- */
+ Out << outline;
- pc += Size;
-
- const MCInstrDesc &TID = MII->get(Inst.getOpcode());
+ Out << "\n";
/*
- * Keep track of forward jumps to a nearby address.
+ * Stop disassembling on return statements, if there is no record of a
+ * jump to a successive address.
+ *
+ * XXX: This currently assumes x86
*/
- if (TID.isBranch()) {
- for (unsigned i = 0; i < Inst.getNumOperands(); ++i) {
- const MCOperand &operand = Inst.getOperand(i);
- if (operand.isImm()) {
- uint64_t jump;
-
- /*
- * FIXME: Handle both relative and absolute addresses correctly.
- * EDInstInfo actually has this info, but operandTypes and
- * operandFlags enums are not exposed in the public interface.
- */
-
- if (1) {
- /*
- * PC relative addr.
- */
-
- jump = pc + operand.getImm();
- } else {
- /*
- * Absolute addr.
- */
-
- jump = (uint64_t)operand.getImm();
- }
-
- /*
- * Output the address relative to the function start, given
- * that MC will print the addresses relative the current pc.
- */
- Out << "\t\t; " << jump;
-
- /*
- * Ignore far jumps given it could be actually a tail return to
- * a random address.
- */
-
- if (jump > max_pc &&
- jump < extent) {
- max_pc = jump;
- }
- }
- }
+ if (Size == 1 && bytes[pc] == 0xc3) {
+ break;
}
- Out << "\n";
-
/*
- * Stop disassembling on return statements, if there is no record of a
- * jump to a successive address.
+ * Advance.
*/
- if (TID.isReturn()) {
- if (pc > max_pc) {
- break;
- }
- }
+ pc += Size;
if (pc >= extent) {
Out << "disassembly larger than " << extent << "bytes, aborting\n";
Out << "\n";
Out.flush();
+ LLVMDisasmDispose(D);
+
/*
* Print GDB command, useful to verify output.
*/
projects / mesa.git / commitdiff