webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 76 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/disassembler/ARMLLVMDisassembler.cpp b/Source/JavaScriptCore/disassembler/ARMLLVMDisassembler.cpp
new file mode 100644
index 000000000..a349abbc6
--- /dev/null
+++ b/Source/JavaScriptCore/disassembler/ARMLLVMDisassembler.cpp
@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "Disassembler.h"
+
+#if USE(ARM_LLVM_DISASSEMBLER)
+
+#include "MacroAssemblerCodeRef.h"
+#include <llvm-c/Disassembler.h>
+#include <llvm-c/Target.h>
+
+namespace JSC {
+
+bool tryToDisassemble(const MacroAssemblerCodePtr& codePtr, size_t size, const char* prefix, PrintStream& out)
+{
+    LLVMInitializeAllTargetInfos();
+    LLVMInitializeAllTargetMCs();
+    LLVMInitializeAllDisassemblers();
+
+    const char* triple = "armv7-unknown-linux-gnueabihf";
+    LLVMDisasmContextRef disassemblyContext = LLVMCreateDisasm(triple, 0, 0, 0, 0);
+
+    RELEASE_ASSERT(disassemblyContext);
+
+    char pcString[20];
+    char instructionString[100];
+
+    uint8_t* pc = static_cast<uint8_t*>(codePtr.executableAddress());
+    uint8_t* end = pc + size;
+
+    while (pc < end) {
+        snprintf(
+            pcString, sizeof(pcString), "0x%lx",
+            static_cast<unsigned long>(bitwise_cast<uintptr_t>(pc)));
+
+        size_t instructionSize = LLVMDisasmInstruction(
+            disassemblyContext, pc, end - pc, bitwise_cast<uintptr_t>(pc),
+            instructionString, sizeof(instructionString));
+
+        if (!instructionSize)
+            snprintf(instructionString, sizeof(instructionString), "unknown instruction");
+
+        out.printf("%s%16s: [0x%08lx] %s\n", prefix, pcString, *(reinterpret_cast<unsigned long*>(pc)), instructionString);
+        pc += 4;
+    }
+
+    LLVMDisasmDispose(disassemblyContext);
+    return true;
+}
+
+} // namespace JSC
+
+#endif // USE(ARM_LLVM_DISASSEMBLER)