Implements exception handler stub on MIPS.

runtime/vm/stub_code_mips.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 "vm/globals.h"
 #if defined(TARGET_ARCH_MIPS)
 
 #include "vm/assembler.h"
 #include "vm/code_generator.h"
 #include "vm/compiler.h"
@@ skipping 1577 matching lines @@
 
 
 // Return the current stack pointer address, used to stack alignment
 // checks.
 void StubCode::GenerateGetStackPointerStub(Assembler* assembler) {
   __ Unimplemented("GetStackPointer Stub");
 }
 
 
 // Jump to the exception or error handler.
-// No Result.
+// RA: return address.
+// A0: program_counter.
+// A1: stack_pointer.
+// A2: frame_pointer.
+// A3: error object.
+// SP: address of stacktrace object.
+// Does not return.
 void StubCode::GenerateJumpToExceptionHandlerStub(Assembler* assembler) {
-  __ Unimplemented("JumpToExceptionHandler Stub");
+  ASSERT(kExceptionObjectReg == A0);
+  ASSERT(kStackTraceObjectReg == A1);
+  __ mov(TMP1, A1);  // Stack pointer.
+  __ mov(RA, A0);  // Program counter.
+  __ mov(A0, A3);  // Exception object.
+  __ lw(A1, Address(SP, 0));  // StackTrace object.
+  __ mov(FP, A2);  // Frame_pointer.
+  __ mov(SP, TMP1);  // Stack pointer.
+  __ jr(RA);  // Jump to the exception handler code.
 }
 
 
 void StubCode::GenerateEqualityWithNullArgStub(Assembler* assembler) {
   __ Unimplemented("EqualityWithNullArg Stub");
 }
 
 
 // Calls to the runtime to optimize the given function.
 // T0: function to be reoptimized.
@@ skipping 118 matching lines @@
   __ Bind(&done);
   __ lw(T0, Address(SP, 0 * kWordSize));
   __ lw(T1, Address(SP, 1 * kWordSize));
   __ Ret();
   __ delay_slot()->addiu(SP, SP, Immediate(2 * kWordSize));
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_MIPS