kern: implement and comment missing 23.0.0 changes

libraries/libmesosphere/source/arch/arm64/kern_cpu.cpp

@@ -220,6 +220,8 @@ namespace ams::kern::arch::arm64::cpu {
 
                 virtual KInterruptTask *OnInterrupt(s32 interrupt_id) override {
                     MESOSPHERE_UNUSED(interrupt_id);
+                    /* TODO: 23.0.0+ now yields here while m_target_cores doesn't have the current core id bit set. */
+                    /* Evaluate if we should do the same. */
                     this->ProcessOperation();
                     m_target_cores &= ~(1ul << GetCurrentCoreId());
                     return nullptr;

libraries/libmesosphere/source/arch/arm64/kern_exception_handlers.cpp

@@ -381,7 +381,7 @@ namespace ams::kern::arch::arm64 {
             }
 
             /* Exit the current process. */
-            cur_process.Exit();
+            cur_process.Exit(-1ll);
         }
 
     }
@@ -548,7 +548,7 @@ namespace ams::kern::arch::arm64 {
         MESOSPHERE_EXCEPTION_LOG("Exception occurred. ");
 
         /* Exit the current process. */
-        GetCurrentProcess().Exit();
+        GetCurrentProcess().Exit(-1ll);
     }
 
     /* NOTE: This function is called from ASM. */