dev(sched): Improvements and work in progress fixes.

what?

 - The main algorithm got improved for real time tasks, and SMP usage.
	- The SMP usage was present before, I just reintroduced it after
	realizing that it won't scale well from what I have right now.
 - Also removed weird implementations quirks from previous sketch.
	- Such as the core 0 being reserved for the boot core.
 - Also moved FS init code after IDT initalization.
	- To avoid weird FS format behavior.
 - Wrap HPET signature in a macro.

next?

 - Work on the HAL's userspace transition mechanism.

Signed-off-by: Amlal El Mahrouss <amlal@nekernel.org>

1 files changed, 26 insertions, 4 deletions

diff --git a/dev/kernel/HALKit/AMD64/HalCoreInterruptHandlerAMD64.cc b/dev/kernel/HALKit/AMD64/HalCoreInterruptHandlerAMD64.cc
index 7e2b8957..eac6c389 100644
--- a/dev/kernel/HALKit/AMD64/HalCoreInterruptHandlerAMD64.cc
+++ b/dev/kernel/HALKit/AMD64/HalCoreInterruptHandlerAMD64.cc
@@ -37,6 +37,9 @@ EXTERN_C Kernel::Void idt_handle_gpf(Kernel::UIntPtr rsp) {
 
   auto& process = Kernel::UserProcessScheduler::The().TheCurrentProcess();
 
+  if (!process) {
+    ke_panic(RUNTIME_CHECK_BAD_BEHAVIOR, "General Access Fault.");
+  }
   if (process.Leak().Signal.SignalID == SIGKILL || process.Leak().Signal.SignalID == SIGABRT ||
       process.Leak().Signal.SignalID == SIGTRAP) {
     dbg_break_point();
@@ -62,6 +65,10 @@ EXTERN_C void idt_handle_pf(Kernel::UIntPtr rsp) {
 
   auto& process = Kernel::UserProcessScheduler::The().TheCurrentProcess();
 
+  if (!process) {
+    ke_panic(RUNTIME_CHECK_BAD_BEHAVIOR, "Access Fault.");
+  }
+
   if (process.Leak().Signal.SignalID == SIGKILL || process.Leak().Signal.SignalID == SIGABRT ||
       process.Leak().Signal.SignalID == SIGTRAP) {
     dbg_break_point();
@@ -101,6 +108,9 @@ EXTERN_C void idt_handle_math(Kernel::UIntPtr rsp) {
 
   auto& process = Kernel::UserProcessScheduler::The().TheCurrentProcess();
 
+  if (!process) {
+    ke_panic(RUNTIME_CHECK_BAD_BEHAVIOR, "Math Fault.");
+  }
   if (process.Leak().Signal.SignalID == SIGKILL || process.Leak().Signal.SignalID == SIGABRT ||
       process.Leak().Signal.SignalID == SIGTRAP) {
     dbg_break_point();
@@ -126,6 +136,10 @@ EXTERN_C void idt_handle_generic(Kernel::UIntPtr rsp) {
 
   auto& process = Kernel::UserProcessScheduler::The().TheCurrentProcess();
 
+  if (!process) {
+    ke_panic(RUNTIME_CHECK_BAD_BEHAVIOR, "Generic Fault.");
+  }
+
   if (process.Leak().Signal.SignalID == SIGKILL || process.Leak().Signal.SignalID == SIGABRT ||
       process.Leak().Signal.SignalID == SIGTRAP) {
     dbg_break_point();
@@ -146,10 +160,15 @@ EXTERN_C void idt_handle_generic(Kernel::UIntPtr rsp) {
 }
 
 EXTERN_C Kernel::Void idt_handle_breakpoint(Kernel::UIntPtr rip) {
-  hal_idt_send_eoi(3);
-
   auto& process = Kernel::UserProcessScheduler::The().TheCurrentProcess();
 
+  if (!process) {
+    while (YES)
+      ;
+  }
+
+  hal_idt_send_eoi(3);
+
   if (process.Leak().Signal.SignalID == SIGKILL || process.Leak().Signal.SignalID == SIGABRT ||
       process.Leak().Signal.SignalID == SIGTRAP) {
     dbg_break_point();
@@ -167,8 +186,6 @@ EXTERN_C Kernel::Void idt_handle_breakpoint(Kernel::UIntPtr rip) {
   Kernel::kout << "Kernel: SIGTRAP status.\r";
 
   process.Leak().Status = Kernel::ProcessStatusKind::kFrozen;
-
-  idt_handle_scheduler(rip);
 }
 
 /// @brief Handle #UD fault.
@@ -180,6 +197,11 @@ EXTERN_C void idt_handle_ud(Kernel::UIntPtr rsp) {
 
   auto& process = Kernel::UserProcessScheduler::The().TheCurrentProcess();
 
+  if (!process) {
+    while (YES)
+      ;
+  }
+
   if (process.Leak().Signal.SignalID == SIGKILL || process.Leak().Signal.SignalID == SIGABRT ||
       process.Leak().Signal.SignalID == SIGTRAP) {
     dbg_break_point();