webkitgtk-2.4.11webkitgtk-2.4.11

1 files changed, 60 insertions, 54 deletions

diff --git a/Source/JavaScriptCore/assembler/MacroAssemblerX86.h b/Source/JavaScriptCore/assembler/MacroAssemblerX86.h
index f05c8cec9..547158fa7 100644
--- a/Source/JavaScriptCore/assembler/MacroAssemblerX86.h
+++ b/Source/JavaScriptCore/assembler/MacroAssemblerX86.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2008, 2014 Apple Inc. All rights reserved.
+ * Copyright (C) 2008 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -30,6 +30,10 @@
 
 #include "MacroAssemblerX86Common.h"
 
+#if USE(MASM_PROBE)
+#include <wtf/StdLibExtras.h>
+#endif
+
 namespace JSC {
 
 class MacroAssemblerX86 : public MacroAssemblerX86Common {
@@ -107,18 +111,6 @@ public:
         m_assembler.movzbl_mr(address, dest);
     }
 
-    void abortWithReason(AbortReason reason)
-    {
-        move(TrustedImm32(reason), X86Registers::eax);
-        breakpoint();
-    }
-
-    void abortWithReason(AbortReason reason, intptr_t misc)
-    {
-        move(TrustedImm32(misc), X86Registers::edx);
-        abortWithReason(reason);
-    }
-
     ConvertibleLoadLabel convertibleLoadPtr(Address address, RegisterID dest)
     {
         ConvertibleLoadLabel result = ConvertibleLoadLabel(this);
@@ -131,11 +123,11 @@ public:
         m_assembler.addsd_mr(address.m_ptr, dest);
     }
 
-    void storeDouble(FPRegisterID src, TrustedImmPtr address)
+    void storeDouble(FPRegisterID src, const void* address)
     {
         ASSERT(isSSE2Present());
-        ASSERT(address.m_value);
-        m_assembler.movsd_rm(src, address.m_value);
+        ASSERT(address);
+        m_assembler.movsd_rm(src, address);
     }
 
     void convertInt32ToDouble(AbsoluteAddress src, FPRegisterID dest)
@@ -164,20 +156,18 @@ public:
         m_assembler.movb_i8m(imm.m_value, address);
     }
     
+    // Possibly clobbers src.
     void moveDoubleToInts(FPRegisterID src, RegisterID dest1, RegisterID dest2)
     {
-        ASSERT(isSSE2Present());
-        m_assembler.pextrw_irr(3, src, dest1);
-        m_assembler.pextrw_irr(2, src, dest2);
-        lshift32(TrustedImm32(16), dest1);
-        or32(dest1, dest2);
-        moveFloatTo32(src, dest1);
+        movePackedToInt32(src, dest1);
+        rshiftPacked(TrustedImm32(32), src);
+        movePackedToInt32(src, dest2);
     }
 
     void moveIntsToDouble(RegisterID src1, RegisterID src2, FPRegisterID dest, FPRegisterID scratch)
     {
-        move32ToFloat(src1, dest);
-        move32ToFloat(src2, scratch);
+        moveInt32ToPacked(src1, dest);
+        moveInt32ToPacked(src2, scratch);
         lshiftPacked(TrustedImm32(32), scratch);
         orPacked(scratch, dest);
     }
@@ -267,14 +257,6 @@ public:
         return Jump(m_assembler.jCC(x86Condition(cond)));
     }
 
-    Jump branch32WithPatch(RelationalCondition cond, Address left, DataLabel32& dataLabel, TrustedImm32 initialRightValue = TrustedImm32(0))
-    {
-        padBeforePatch();
-        m_assembler.cmpl_im_force32(initialRightValue.m_value, left.offset, left.base);
-        dataLabel = DataLabel32(this);
-        return Jump(m_assembler.jCC(x86Condition(cond)));
-    }
-
     DataLabelPtr storePtrWithPatch(TrustedImmPtr initialValue, ImplicitAddress address)
     {
         padBeforePatch();
@@ -283,6 +265,7 @@ public:
     }
 
     static bool supportsFloatingPoint() { return isSSE2Present(); }
+    // See comment on MacroAssemblerARMv7::supportsFloatingPointTruncate()
     static bool supportsFloatingPointTruncate() { return isSSE2Present(); }
     static bool supportsFloatingPointSqrt() { return isSSE2Present(); }
     static bool supportsFloatingPointAbs() { return isSSE2Present(); }
@@ -294,7 +277,6 @@ public:
     }
 
     static bool canJumpReplacePatchableBranchPtrWithPatch() { return true; }
-    static bool canJumpReplacePatchableBranch32WithPatch() { return true; }
     
     static CodeLocationLabel startOfBranchPtrWithPatchOnRegister(CodeLocationDataLabelPtr label)
     {
@@ -317,17 +299,6 @@ public:
         return label.labelAtOffset(-totalBytes);
     }
     
-    static CodeLocationLabel startOfPatchableBranch32WithPatchOnAddress(CodeLocationDataLabel32 label)
-    {
-        const int opcodeBytes = 1;
-        const int modRMBytes = 1;
-        const int offsetBytes = 0;
-        const int immediateBytes = 4;
-        const int totalBytes = opcodeBytes + modRMBytes + offsetBytes + immediateBytes;
-        ASSERT(totalBytes >= maxJumpReplacementSize());
-        return label.labelAtOffset(-totalBytes);
-    }
-    
     static void revertJumpReplacementToBranchPtrWithPatch(CodeLocationLabel instructionStart, RegisterID reg, void* initialValue)
     {
         X86Assembler::revertJumpTo_cmpl_ir_force32(instructionStart.executableAddress(), reinterpret_cast<intptr_t>(initialValue), reg);
@@ -339,10 +310,18 @@ public:
         X86Assembler::revertJumpTo_cmpl_im_force32(instructionStart.executableAddress(), reinterpret_cast<intptr_t>(initialValue), 0, address.base);
     }
 
-    static void revertJumpReplacementToPatchableBranch32WithPatch(CodeLocationLabel instructionStart, Address address, int32_t initialValue)
+#if USE(MASM_PROBE)
+    // For details about probe(), see comment in MacroAssemblerX86_64.h.
+    void probe(ProbeFunction, void* arg1 = 0, void* arg2 = 0);
+#endif // USE(MASM_PROBE)
+
+private:
+    friend class LinkBuffer;
+    friend class RepatchBuffer;
+
+    static void linkCall(void* code, Call call, FunctionPtr function)
     {
-        ASSERT(!address.offset);
-        X86Assembler::revertJumpTo_cmpl_im_force32(instructionStart.executableAddress(), initialValue, 0, address.base);
+        X86Assembler::linkCall(code, call.m_label, function.value());
     }
 
     static void repatchCall(CodeLocationCall call, CodeLocationLabel destination)
@@ -355,18 +334,45 @@ public:
         X86Assembler::relinkCall(call.dataLocation(), destination.executableAddress());
     }
 
-private:
-    friend class LinkBuffer;
+#if USE(MASM_PROBE)
+    inline TrustedImm32 trustedImm32FromPtr(void* ptr)
+    {
+        return TrustedImm32(TrustedImmPtr(ptr));
+    }
 
-    static void linkCall(void* code, Call call, FunctionPtr function)
+    inline TrustedImm32 trustedImm32FromPtr(ProbeFunction function)
     {
-        if (call.isFlagSet(Call::Tail))
-            X86Assembler::linkJump(code, call.m_label, function.value());
-        else
-            X86Assembler::linkCall(code, call.m_label, function.value());
+        return TrustedImm32(TrustedImmPtr(reinterpret_cast<void*>(function)));
+    }
+
+    inline TrustedImm32 trustedImm32FromPtr(void (*function)())
+    {
+        return TrustedImm32(TrustedImmPtr(reinterpret_cast<void*>(function)));
     }
+#endif
 };
 
+#if USE(MASM_PROBE)
+
+extern "C" void ctiMasmProbeTrampoline();
+
+// For details on "What code is emitted for the probe?" and "What values are in
+// the saved registers?", see comment for MacroAssemblerX86::probe() in
+// MacroAssemblerX86_64.h.
+
+inline void MacroAssemblerX86::probe(MacroAssemblerX86::ProbeFunction function, void* arg1, void* arg2)
+{
+    push(RegisterID::esp);
+    push(RegisterID::eax);
+    push(trustedImm32FromPtr(arg2));
+    push(trustedImm32FromPtr(arg1));
+    push(trustedImm32FromPtr(function));
+
+    move(trustedImm32FromPtr(ctiMasmProbeTrampoline), RegisterID::eax);
+    call(RegisterID::eax);
+}
+#endif // USE(MASM_PROBE)
+
 } // namespace JSC
 
 #endif // ENABLE(ASSEMBLER)