[Webkit-unassigned] [Bug 73432] MacroAssemblerMIPS does not implement readCallTarget

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=73432





--- Comment #1 from Chao-ying Fu <fu at mips.com>  2011-11-30 11:39:48 PST ---
Can you try this patch quickly?  I haven't had time to test.  Thanks a lot!

Regards,
Chao-ying

Index: MIPSAssembler.h
===================================================================
--- MIPSAssembler.h     (revision 101454)
+++ MIPSAssembler.h     (working copy)
@@ -772,6 +772,18 @@
         return reinterpret_cast<void*>(readInt32(from));
     }

+    static void* readCallTarget(void* from)
+    {
+        MIPSWord* insn = reinterpret_cast<MIPSWord*>(from);
+        insn -= 4;
+        ASSERT((*insn & 0xffe00000) == 0x3c000000); // lui
+        int32_t result = (*insn & 0x0000ffff) << 16;
+        insn++;
+        ASSERT((*insn & 0xfc000000) == 0x34000000); // ori
+        result |= *insn & 0x0000ffff;
+        return reinterpret_cast<void*>(result);
+    }
+
 private:
     /* Update each jump in the buffer of newBase.  */
     void relocateJumps(void* oldBase, void* newBase)
Index: MacroAssemblerMIPS.h
===================================================================
--- MacroAssemblerMIPS.h        (revision 101454)
+++ MacroAssemblerMIPS.h        (working copy)
@@ -1815,6 +1815,11 @@
         m_assembler.nop();
     }

+    static FunctionPtr readCallTarget(CodeLocationCall call)
+    {
+        return FunctionPtr(reinterpret_cast<void(*)()>(MIPSAssembler::readCallTarget(call.dataLocation())));
+    }
+
 private:
     // If m_fixedWidth is true, we will generate a fixed number of instructions.
     // Otherwise, we can emit any number of instructions.

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