- Add a skeleton MIPS assembler, disassembler and simulator.

runtime/vm/simulator_arm.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include <math.h>  // for isnan.
 #include <setjmp.h>
 #include <stdlib.h>
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_ARM)
@@ skipping 2723 matching lines @@
       program_counter = get_pc();
     }
   }
 }
 
 
 int64_t Simulator::Call(int32_t entry,
                         int32_t parameter0,
                         int32_t parameter1,
                         int32_t parameter2,
-                        int32_t parameter3,
-                        int32_t parameter4) {
+                        int32_t parameter3) {
   // Save the SP register before the call so we can restore it.
   int32_t sp_before_call = get_register(SP);
 
   // Setup parameters.
   set_register(R0, parameter0);
   set_register(R1, parameter1);
   set_register(R2, parameter2);
   set_register(R3, parameter3);
 
-  // Reserve room for one stack parameter.
+  // Make sure the activation frames are properly aligned.
   int32_t stack_pointer = sp_before_call;
-  stack_pointer -= kWordSize;
-
-  // Make sure the activation frames are properly aligned.
   static const int kFrameAlignment = OS::ActivationFrameAlignment();
   if (kFrameAlignment > 0) {
     stack_pointer = Utils::RoundDown(stack_pointer, kFrameAlignment);
   }
-
-  // Write the fourth parameter to the stack and update register SP.
-  *reinterpret_cast<int32_t*>(stack_pointer) = parameter4;
   set_register(SP, stack_pointer);
 
   // Prepare to execute the code at entry.
   set_register(PC, entry);
   // Put down marker for end of simulation. The simulator will stop simulation
   // when the PC reaches this value. By saving the "end simulation" value into
   // the LR the simulation stops when returning to this call point.
   set_register(LR, kEndSimulatingPC);
 
   // Remember the values of callee-saved registers.
@@ skipping 69 matching lines @@
   // isolate->ChangeStateToGeneratedCode();
   set_register(kExceptionObjectReg, bit_cast<int32_t>(object.raw()));
   buf->Longjmp();
 }
 
 }  // namespace dart
 
 #endif  // !defined(HOST_ARCH_ARM)
 
 #endif  // defined TARGET_ARCH_ARM