diff --git a/src/debug/mips/debug-mips.cc b/src/debug/mips/debug-mips.cc
index 30bf2159bc3c..d1ab6ec545f8 100644
--- a/src/debug/mips/debug-mips.cc
+++ b/src/debug/mips/debug-mips.cc
@@ -34,14 +34,12 @@ void DebugCodegen::GenerateFrameDropperTrampoline(MacroAssembler* masm) {
   // - Restart the frame by calling the function.
   __ mov(fp, a1);
   __ lw(a1, MemOperand(fp, StandardFrameConstants::kFunctionOffset));
+  __ lw(a0, MemOperand(fp, StandardFrameConstants::kArgCOffset));
 
   // Pop return address and frame.
   __ LeaveFrame(StackFrame::INTERNAL);
 
-  __ lw(a0, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset));
-  __ lhu(a0,
-         FieldMemOperand(a0, SharedFunctionInfo::kFormalParameterCountOffset));
-  __ mov(a2, a0);
+  __ li(a2, Operand(kDontAdaptArgumentsSentinel));
 
   __ InvokeFunction(a1, a2, a0, JUMP_FUNCTION);
 }
diff --git a/src/debug/mips64/debug-mips64.cc b/src/debug/mips64/debug-mips64.cc
index f677a38ee250..7b8e9e974476 100644
--- a/src/debug/mips64/debug-mips64.cc
+++ b/src/debug/mips64/debug-mips64.cc
@@ -34,14 +34,12 @@ void DebugCodegen::GenerateFrameDropperTrampoline(MacroAssembler* masm) {
   // - Restart the frame by calling the function.
   __ mov(fp, a1);
   __ Ld(a1, MemOperand(fp, StandardFrameConstants::kFunctionOffset));
+  __ Ld(a0, MemOperand(fp, StandardFrameConstants::kArgCOffset));
 
   // Pop return address and frame.
   __ LeaveFrame(StackFrame::INTERNAL);
 
-  __ Ld(a0, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset));
-  __ Lhu(a0,
-         FieldMemOperand(a0, SharedFunctionInfo::kFormalParameterCountOffset));
-  __ mov(a2, a0);
+  __ li(a2, Operand(kDontAdaptArgumentsSentinel));
 
   __ InvokeFunction(a1, a2, a0, JUMP_FUNCTION);
 }
diff --git a/src/wasm/baseline/mips/liftoff-assembler-mips.h b/src/wasm/baseline/mips/liftoff-assembler-mips.h
index 967991220a35..6e19a8e41fdd 100644
--- a/src/wasm/baseline/mips/liftoff-assembler-mips.h
+++ b/src/wasm/baseline/mips/liftoff-assembler-mips.h
@@ -407,8 +407,16 @@ void LiftoffAssembler::LoadFromInstance(Register dst, int32_t offset,
                                         int size) {
   DCHECK_LE(0, offset);
   lw(dst, liftoff::GetInstanceOperand());
-  DCHECK_EQ(4, size);
-  lw(dst, MemOperand(dst, offset));
+  switch (size) {
+    case 1:
+      lb(dst, MemOperand(dst, offset));
+      break;
+    case 4:
+      lw(dst, MemOperand(dst, offset));
+      break;
+    default:
+      UNIMPLEMENTED();
+  }
 }
 
 void LiftoffAssembler::LoadTaggedPointerFromInstance(Register dst,
diff --git a/src/wasm/baseline/mips64/liftoff-assembler-mips64.h b/src/wasm/baseline/mips64/liftoff-assembler-mips64.h
index 10fc0244f7d1..848adeb3d9bd 100644
--- a/src/wasm/baseline/mips64/liftoff-assembler-mips64.h
+++ b/src/wasm/baseline/mips64/liftoff-assembler-mips64.h
@@ -389,11 +389,18 @@ void LiftoffAssembler::LoadFromInstance(Register dst, int32_t offset,
                                         int size) {
   DCHECK_LE(0, offset);
   Ld(dst, liftoff::GetInstanceOperand());
-  DCHECK(size == 4 || size == 8);
-  if (size == 4) {
-    Lw(dst, MemOperand(dst, offset));
-  } else {
-    Ld(dst, MemOperand(dst, offset));
+  switch (size) {
+    case 1:
+      Lb(dst, MemOperand(dst, offset));
+      break;
+    case 4:
+      Lw(dst, MemOperand(dst, offset));
+      break;
+    case 8:
+      Ld(dst, MemOperand(dst, offset));
+      break;
+    default:
+      UNIMPLEMENTED();
   }
 }