fixes for PR comments

Author: Stanislav Shwartsman

bochs/cpu/cpu.h

@@ -5089,7 +5089,7 @@ class BX_CPU_C : public logfunctions {
 #endif
 
 #if BX_SUPPORT_FRED
-  BX_SMF BX_CPP_INLINE void set_CSL(unsigned new_CSL) { BX_CPU_THIS_PTR msr.ia32_fred_cfg = (BX_CPU_THIS_PTR msr.ia32_fred_cfg & ~0x3) | new_CSL; }
+  BX_SMF BX_CPP_INLINE void set_CSL(unsigned new_CSL) { BX_CPU_THIS_PTR msr.ia32_fred_cfg = (BX_CPU_THIS_PTR msr.ia32_fred_cfg & ~BX_CONST64(0x3)) | new_CSL; }
 #endif
 
   BX_SMF bx_address get_segment_base(unsigned seg);

bochs/cpu/fred.cc

@@ -152,10 +152,6 @@ void BX_CPU_C::FRED_EventDelivery(Bit8u vector, unsigned type, Bit16u error_code
   RSP = new_RSP;
   set_CSL(new_CSL);
 
-#if BX_SUPPORT_CET
-  if (ShadowStackEnabled(0)) SSP = new_SSP;
-#endif
-
   // save state on stack
   // Save return state on new regular stack; memory accesses here have supervisor privilege
   write_new_stack_qword(new_RSP - 8,  0, 0);    // first 8 bytes pushed are all zeros
@@ -166,7 +162,7 @@ void BX_CPU_C::FRED_EventDelivery(Bit8u vector, unsigned type, Bit16u error_code
   write_new_stack_qword(new_RSP - 48, 0, old_CS);
   write_new_stack_qword(new_RSP - 56, 0, old_RIP);
   write_new_stack_qword(new_RSP - 64, 0, error_code);
-  new_RSP -= 64;
+  RSP -= 64;
 
 #if BX_SUPPORT_CET
   if (BX_CPU_THIS_PTR cr4.get_CET()) {