JavaScriptCore-7600.1.4.11.8.tar.gz

[apple/javascriptcore.git] / assembler / RepatchBuffer.h

diff --git a/assembler/RepatchBuffer.h b/assembler/RepatchBuffer.h
index 72cf6b27f09e3507e9cdfec0c7cff904260cc03f..241ce14c73c05fa9624bc60b4a08379f70e2c340 100644 (file)
--- a/assembler/RepatchBuffer.h
+++ b/assembler/RepatchBuffer.h
@@ -26,8 +26,9 @@
 #ifndef RepatchBuffer_h
 #define RepatchBuffer_h
 
-#if ENABLE(ASSEMBLER)
+#if ENABLE(JIT)
 
+#include "CodeBlock.h"
 #include <MacroAssembler.h>
 #include <wtf/Noncopyable.h>
 
@@ -44,18 +45,25 @@ class RepatchBuffer {
 
 public:
     RepatchBuffer(CodeBlock* codeBlock)
+        : m_codeBlock(codeBlock)
     {
-        JITCode& code = codeBlock->getJITCode();
-        m_start = code.start();
-        m_size = code.size();
+#if ENABLE(ASSEMBLER_WX_EXCLUSIVE)
+        RefPtr<JITCode> code = codeBlock->jitCode();
+        m_start = code->start();
+        m_size = code->size();
 
         ExecutableAllocator::makeWritable(m_start, m_size);
+#endif
     }
 
     ~RepatchBuffer()
     {
+#if ENABLE(ASSEMBLER_WX_EXCLUSIVE)
         ExecutableAllocator::makeExecutable(m_start, m_size);
+#endif
     }
+    
+    CodeBlock* codeBlock() const { return m_codeBlock; }
 
     void relink(CodeLocationJump jump, CodeLocationLabel destination)
     {
@@ -87,14 +95,14 @@ public:
         MacroAssembler::repatchInt32(dataLabel32, value);
     }
 
-    void repatch(CodeLocationDataLabelPtr dataLabelPtr, void* value)
+    void repatch(CodeLocationDataLabelCompact dataLabelCompact, int32_t value)
     {
-        MacroAssembler::repatchPointer(dataLabelPtr, value);
+        MacroAssembler::repatchCompact(dataLabelCompact, value);
     }
 
-    void repatchLoadPtrToLEA(CodeLocationInstruction instruction)
+    void repatch(CodeLocationDataLabelPtr dataLabelPtr, void* value)
     {
-        MacroAssembler::repatchLoadPtrToLEA(instruction);
+        MacroAssembler::repatchPointer(dataLabelPtr, value);
     }
 
     void relinkCallerToTrampoline(ReturnAddressPtr returnAddress, CodeLocationLabel label)
@@ -121,10 +129,69 @@ public:
     {
         relinkNearCallerToTrampoline(returnAddress, CodeLocationLabel(newCalleeFunction));
     }
+    
+    void replaceWithLoad(CodeLocationConvertibleLoad label)
+    {
+        MacroAssembler::replaceWithLoad(label);
+    }
+    
+    void replaceWithAddressComputation(CodeLocationConvertibleLoad label)
+    {
+        MacroAssembler::replaceWithAddressComputation(label);
+    }
+    
+    void setLoadInstructionIsActive(CodeLocationConvertibleLoad label, bool isActive)
+    {
+        if (isActive)
+            replaceWithLoad(label);
+        else
+            replaceWithAddressComputation(label);
+    }
+
+    static CodeLocationLabel startOfBranchPtrWithPatchOnRegister(CodeLocationDataLabelPtr label)
+    {
+        return MacroAssembler::startOfBranchPtrWithPatchOnRegister(label);
+    }
+    
+    static CodeLocationLabel startOfPatchableBranchPtrWithPatchOnAddress(CodeLocationDataLabelPtr label)
+    {
+        return MacroAssembler::startOfPatchableBranchPtrWithPatchOnAddress(label);
+    }
+
+    static CodeLocationLabel startOfPatchableBranch32WithPatchOnAddress(CodeLocationDataLabel32 label)
+    {
+        return MacroAssembler::startOfPatchableBranch32WithPatchOnAddress(label);
+    }
+    
+    void replaceWithJump(CodeLocationLabel instructionStart, CodeLocationLabel destination)
+    {
+        MacroAssembler::replaceWithJump(instructionStart, destination);
+    }
+    
+    // This is a *bit* of a silly API, since we currently always also repatch the
+    // immediate after calling this. But I'm fine with that, since this just feels
+    // less yucky.
+    void revertJumpReplacementToBranchPtrWithPatch(CodeLocationLabel instructionStart, MacroAssembler::RegisterID reg, void* value)
+    {
+        MacroAssembler::revertJumpReplacementToBranchPtrWithPatch(instructionStart, reg, value);
+    }
+
+    void revertJumpReplacementToPatchableBranchPtrWithPatch(CodeLocationLabel instructionStart, MacroAssembler::Address address, void* value)
+    {
+        MacroAssembler::revertJumpReplacementToPatchableBranchPtrWithPatch(instructionStart, address, value);
+    }
+
+    void revertJumpReplacementToPatchableBranch32WithPatch(CodeLocationLabel instructionStart, MacroAssembler::Address address, int32_t value)
+    {
+        MacroAssembler::revertJumpReplacementToPatchableBranch32WithPatch(instructionStart, address, value);
+    }
 
 private:
+    CodeBlock* m_codeBlock;
+#if ENABLE(ASSEMBLER_WX_EXCLUSIVE)
     void* m_start;
     size_t m_size;
+#endif
 };
 
 } // namespace JSC