MIPS: Move stack unwinding logic into the runtime.

src/mips/macro-assembler-mips.cc

Index: src/mips/macro-assembler-mips.cc
diff --git a/src/mips/macro-assembler-mips.cc b/src/mips/macro-assembler-mips.cc
index 6c07e6863af97f882c20c16f97a2b356775a9ca5..ae44b3d4db197cee34996f7e29fba11afb8322e1 100644
--- a/src/mips/macro-assembler-mips.cc
+++ b/src/mips/macro-assembler-mips.cc
@@ -3270,101 +3270,6 @@ void MacroAssembler::PopTryHandler() {
 }
 
 
-void MacroAssembler::JumpToHandlerEntry() {
-  // Compute the handler entry address and jump to it.  The handler table is
-  // a fixed array of (smi-tagged) code offsets.
-  // v0 = exception, a1 = code object, a2 = state.
-  lw(a3, FieldMemOperand(a1, Code::kHandlerTableOffset));  // Handler table.
-  Addu(a3, a3, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
-  srl(a2, a2, StackHandler::kKindWidth);  // Handler index.
-  sll(a2, a2, kPointerSizeLog2);
-  Addu(a2, a3, a2);
-  lw(a2, MemOperand(a2));  // Smi-tagged offset.
-  Addu(a1, a1, Operand(Code::kHeaderSize - kHeapObjectTag));  // Code start.
-  sra(t9, a2, kSmiTagSize);
-  Addu(t9, t9, a1);
-  Jump(t9);  // Jump.
-}
-
-
-void MacroAssembler::Throw(Register value) {
-  // Adjust this code if not the case.
-  STATIC_ASSERT(StackHandlerConstants::kSize == 5 * kPointerSize);
-  STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0);
-  STATIC_ASSERT(StackHandlerConstants::kCodeOffset == 1 * kPointerSize);
-  STATIC_ASSERT(StackHandlerConstants::kStateOffset == 2 * kPointerSize);
-  STATIC_ASSERT(StackHandlerConstants::kContextOffset == 3 * kPointerSize);
-  STATIC_ASSERT(StackHandlerConstants::kFPOffset == 4 * kPointerSize);
-
-  // The exception is expected in v0.
-  Move(v0, value);
-
-  // Drop the stack pointer to the top of the top handler.
-  li(a3, Operand(ExternalReference(Isolate::kHandlerAddress,
-                                   isolate())));
-  lw(sp, MemOperand(a3));
-
-  // Restore the next handler.
-  pop(a2);
-  sw(a2, MemOperand(a3));
-
-  // Get the code object (a1) and state (a2).  Restore the context and frame
-  // pointer.
-  MultiPop(a1.bit() | a2.bit() | cp.bit() | fp.bit());
-
-  // If the handler is a JS frame, restore the context to the frame.
-  // (kind == ENTRY) == (fp == 0) == (cp == 0), so we could test either fp
-  // or cp.
-  Label done;
-  Branch(&done, eq, cp, Operand(zero_reg));
-  sw(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
-  bind(&done);
-
-  JumpToHandlerEntry();
-}
-
-
-void MacroAssembler::ThrowUncatchable(Register value) {
-  // Adjust this code if not the case.
-  STATIC_ASSERT(StackHandlerConstants::kSize == 5 * kPointerSize);
-  STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0 * kPointerSize);
-  STATIC_ASSERT(StackHandlerConstants::kCodeOffset == 1 * kPointerSize);
-  STATIC_ASSERT(StackHandlerConstants::kStateOffset == 2 * kPointerSize);
-  STATIC_ASSERT(StackHandlerConstants::kContextOffset == 3 * kPointerSize);
-  STATIC_ASSERT(StackHandlerConstants::kFPOffset == 4 * kPointerSize);
-
-  // The exception is expected in v0.
-  if (!value.is(v0)) {
-    mov(v0, value);
-  }
-  // Drop the stack pointer to the top of the top stack handler.
-  li(a3, Operand(ExternalReference(Isolate::kHandlerAddress, isolate())));
-  lw(sp, MemOperand(a3));
-
-  // Unwind the handlers until the ENTRY handler is found.
-  Label fetch_next, check_kind;
-  jmp(&check_kind);
-  bind(&fetch_next);
-  lw(sp, MemOperand(sp, StackHandlerConstants::kNextOffset));
-
-  bind(&check_kind);
-  STATIC_ASSERT(StackHandler::JS_ENTRY == 0);
-  lw(a2, MemOperand(sp, StackHandlerConstants::kStateOffset));
-  And(a2, a2, Operand(StackHandler::KindField::kMask));
-  Branch(&fetch_next, ne, a2, Operand(zero_reg));
-
-  // Set the top handler address to next handler past the top ENTRY handler.
-  pop(a2);
-  sw(a2, MemOperand(a3));
-
-  // Get the code object (a1) and state (a2).  Clear the context and frame
-  // pointer (0 was saved in the handler).
-  MultiPop(a1.bit() | a2.bit() | cp.bit() | fp.bit());
-
-  JumpToHandlerEntry();
-}
-
-
 void MacroAssembler::Allocate(int object_size,
                               Register result,
                               Register scratch1,