[mips] Fix layout of exit frame.

Change-Id: I1a30de8d889c60c59b6ef38a13f19f1fb7268622
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1524756Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Yu Yin <xwafish@gmail.com>
Cr-Commit-Position: refs/heads/master@{#60284}

src/mips/macro-assembler-mips.cc

@@ -4821,13 +4821,13 @@ void MacroAssembler::EnterExitFrame(bool save_doubles, int stack_space,
 
   // Save registers and reserve room for saved entry sp.
   addiu(sp, sp, -2 * kPointerSize - ExitFrameConstants::kFixedFrameSizeFromFp);
-  sw(ra, MemOperand(sp, 4 * kPointerSize));
-  sw(fp, MemOperand(sp, 3 * kPointerSize));
+  sw(ra, MemOperand(sp, 3 * kPointerSize));
+  sw(fp, MemOperand(sp, 2 * kPointerSize));
   {
     UseScratchRegisterScope temps(this);
     Register scratch = temps.Acquire();
     li(scratch, Operand(StackFrame::TypeToMarker(frame_type)));
-    sw(scratch, MemOperand(sp, 2 * kPointerSize));
+    sw(scratch, MemOperand(sp, 1 * kPointerSize));
   }
   // Set up new frame pointer.
   addiu(fp, sp, ExitFrameConstants::kFixedFrameSizeFromFp);

src/mips64/macro-assembler-mips64.cc

@@ -5173,13 +5173,13 @@ void MacroAssembler::EnterExitFrame(bool save_doubles, int stack_space,
 
   // Save registers and reserve room for saved entry sp.
   daddiu(sp, sp, -2 * kPointerSize - ExitFrameConstants::kFixedFrameSizeFromFp);
-  Sd(ra, MemOperand(sp, 4 * kPointerSize));
-  Sd(fp, MemOperand(sp, 3 * kPointerSize));
+  Sd(ra, MemOperand(sp, 3 * kPointerSize));
+  Sd(fp, MemOperand(sp, 2 * kPointerSize));
   {
     UseScratchRegisterScope temps(this);
     Register scratch = temps.Acquire();
     li(scratch, Operand(StackFrame::TypeToMarker(frame_type)));
-    Sd(scratch, MemOperand(sp, 2 * kPointerSize));
+    Sd(scratch, MemOperand(sp, 1 * kPointerSize));
   }
   // Set up new frame pointer.
   daddiu(fp, sp, ExitFrameConstants::kFixedFrameSizeFromFp);