1 files changed, 33 insertions, 11 deletions

diff --git a/Source/JavaScriptCore/assembler/AbstractMacroAssembler.h b/Source/JavaScriptCore/assembler/AbstractMacroAssembler.h
index 5ebc572..8e81784 100644
--- a/Source/JavaScriptCore/assembler/AbstractMacroAssembler.h
+++ b/Source/JavaScriptCore/assembler/AbstractMacroAssembler.h
@@ -145,21 +145,21 @@ public:
     // Describes an memory operand given by a pointer.  For regular load & store
     // operations an unwrapped void* will be used, rather than using this.
     struct AbsoluteAddress {
-        explicit AbsoluteAddress(void* ptr)
+        explicit AbsoluteAddress(const void* ptr)
             : m_ptr(ptr)
         {
         }
 
-        void* m_ptr;
+        const void* m_ptr;
     };
 
-    // ImmPtr:
+    // TrustedImmPtr:
     //
     // A pointer sized immediate operand to an instruction - this is wrapped
     // in a class requiring explicit construction in order to differentiate
     // from pointers used as absolute addresses to memory operations
-    struct ImmPtr {
-        explicit ImmPtr(const void* value)
+    struct TrustedImmPtr {
+        explicit TrustedImmPtr(const void* value)
             : m_value(value)
         {
         }
@@ -172,14 +172,21 @@ public:
         const void* m_value;
     };
 
-    // Imm32:
+    struct ImmPtr : public TrustedImmPtr {
+        explicit ImmPtr(const void* value)
+            : TrustedImmPtr(value)
+        {
+        }
+    };
+
+    // TrustedImm32:
     //
     // A 32bit immediate operand to an instruction - this is wrapped in a
     // class requiring explicit construction in order to prevent RegisterIDs
     // (which are implemented as an enum) from accidentally being passed as
     // immediate values.
-    struct Imm32 {
-        explicit Imm32(int32_t value)
+    struct TrustedImm32 {
+        explicit TrustedImm32(int32_t value)
             : m_value(value)
 #if CPU(ARM) || CPU(MIPS)
             , m_isPointer(false)
@@ -188,7 +195,7 @@ public:
         }
 
 #if !CPU(X86_64)
-        explicit Imm32(ImmPtr ptr)
+        explicit TrustedImm32(TrustedImmPtr ptr)
             : m_value(ptr.asIntptr())
 #if CPU(ARM) || CPU(MIPS)
             , m_isPointer(true)
@@ -211,6 +218,19 @@ public:
     };
 
 
+    struct Imm32 : public TrustedImm32 {
+        explicit Imm32(int32_t value)
+            : TrustedImm32(value)
+        {
+        }
+#if !CPU(X86_64)
+        explicit Imm32(TrustedImmPtr ptr)
+            : TrustedImm32(ptr)
+        {
+        }
+#endif
+    };
+    
     // Section 2: MacroAssembler code buffer handles
     //
     // The following types are used to reference items in the code buffer
@@ -358,16 +378,18 @@ public:
         {
         }
         
-        void link(AbstractMacroAssembler<AssemblerType>* masm)
+        void link(AbstractMacroAssembler<AssemblerType>* masm) const
         {
             masm->m_assembler.linkJump(m_jmp, masm->m_assembler.label());
         }
         
-        void linkTo(Label label, AbstractMacroAssembler<AssemblerType>* masm)
+        void linkTo(Label label, AbstractMacroAssembler<AssemblerType>* masm) const
         {
             masm->m_assembler.linkJump(m_jmp, label.m_label);
         }
 
+        bool isSet() const { return m_jmp.isSet(); }
+
     private:
         JmpSrc m_jmp;
     };