Adding disassembler interface and external hook to udis86 library.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33358 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/Disassembler.cpp b/lib/Support/Disassembler.cpp
new file mode 100644
index 0000000..cc1f5e4
--- /dev/null
+++ b/lib/Support/Disassembler.cpp
@@ -0,0 +1,53 @@
+//===- lib/Support/Disassembler.cpp -----------------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by Anton Korobeynikov and is distributed under the
+// University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the necessary glue to call external disassembler
+// libraries.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Config/config.h"
+#include "llvm/Support/Disassembler.h"
+
+#include <cassert>
+#include <iomanip>
+#include <string>
+#include <sstream>
+
+#if USE_UDIS86
+#include <udis86.h>
+#endif
+
+using namespace llvm;
+
+std::string llvm::disassembleBuffer(uint8_t* start, size_t length,
+ Disassembler::Type type, uint64_t pc) {
+ std::stringstream res;
+
+ if (type == Disassembler::X86_32 || type == Disassembler::X86_64) {
+#if USE_UDIS86
+ ud_t ud_obj;
+
+ ud_init(&ud_obj);
+ ud_set_input_buffer(&ud_obj, start, length);
+ ud_set_mode(&ud_obj, (type == Disassembler::X86_32 ? 32 : 64));
+ ud_set_pc(&ud_obj, pc);
+ ud_set_syntax(&ud_obj, UD_SYN_ATT);
+
+ res << std::setbase(16)
+ << std::setw((type == Disassembler::X86_32 ? 8 : 16));
+
+ while (ud_disassemble(&ud_obj)) {
+ res << ud_insn_off(&ud_obj) << ":\t" << ud_insn_asm(&ud_obj) << "\n";
+ }
+#endif
+ }
+
+ return res.str();
+}