MIPS: Move stack unwinding logic into the runtime.

src/mips/macro-assembler-mips.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_MIPS_MACRO_ASSEMBLER_MIPS_H_
 #define V8_MIPS_MACRO_ASSEMBLER_MIPS_H_
 
 #include "src/assembler.h"
 #include "src/globals.h"
 #include "src/mips/assembler-mips.h"
@@ skipping 952 matching lines @@
   // -------------------------------------------------------------------------
   // Exception handling.
 
   // Push a new try handler and link into try handler chain.
   void PushTryHandler(StackHandler::Kind kind, int handler_index);
 
   // Unlink the stack handler on top of the stack from the try handler chain.
   // Must preserve the result register.
   void PopTryHandler();
 
-  // Passes thrown value to the handler of top of the try handler chain.
-  void Throw(Register value);
-
-  // Propagates an uncatchable exception to the top of the current JS stack's
-  // handler chain.
-  void ThrowUncatchable(Register value);
-
   // Copies a fixed number of fields of heap objects from src to dst.
   void CopyFields(Register dst, Register src, RegList temps, int field_count);
 
   // Copies a number of bytes from src to dst. All registers are clobbered. On
   // exit src and dst will point to the place just after where the last byte was
   // read or written and length will be zero.
   void CopyBytes(Register src,
                  Register dst,
                  Register length,
                  Register scratch);
@@ skipping 657 matching lines @@
                   Condition cond,  // eq for new space, ne otherwise.
                   Label* branch);
 
   // Helper for finding the mark bits for an address.  Afterwards, the
   // bitmap register points at the word with the mark bits and the mask
   // the position of the first bit.  Leaves addr_reg unchanged.
   inline void GetMarkBits(Register addr_reg,
                           Register bitmap_reg,
                           Register mask_reg);
 
-  // Helper for throwing exceptions.  Compute a handler address and jump to
-  // it.  See the implementation for register usage.
-  void JumpToHandlerEntry();
-
   // Compute memory operands for safepoint stack slots.
   static int SafepointRegisterStackIndex(int reg_code);
   MemOperand SafepointRegisterSlot(Register reg);
   MemOperand SafepointRegistersAndDoublesSlot(Register reg);
 
   bool generating_stub_;
   bool has_frame_;
   bool has_double_zero_reg_set_;
   // This handle will be patched with the code object on installation.
   Handle<Object> code_object_;
@@ skipping 48 matching lines @@
 #define CODE_COVERAGE_TOSTRING(x) CODE_COVERAGE_STRINGIFY(x)
 #define __FILE_LINE__ __FILE__ ":" CODE_COVERAGE_TOSTRING(__LINE__)
 #define ACCESS_MASM(masm) masm->stop(__FILE_LINE__); masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 
 } }  // namespace v8::internal
 
 #endif  // V8_MIPS_MACRO_ASSEMBLER_MIPS_H_