1 files changed, 156 insertions, 0 deletions
diff --git a/src/kernel/HALKit/ARM64/HalCoreInterruptHandler.cpp b/src/kernel/HALKit/ARM64/HalCoreInterruptHandler.cpp
new file mode 100644
index 00000000..f0085e13
--- /dev/null
+++ b/src/kernel/HALKit/ARM64/HalCoreInterruptHandler.cpp
@@ -0,0 +1,156 @@
+// Copyright 2024-2025, Amlal El Mahrouss (amlal@nekernel.org)
+// Licensed under the Apache License, Version 2.0 (see LICENSE file)
+// Official repository: https://github.com/nekernel-org/nekernel
+
+#include <ArchKit/ArchKit.h>
+#include <KernelKit/ProcessScheduler.h>
+#include <KernelKit/UserMgr+User.h>
+#include <NeKit/KString.h>
+#include <SignalKit/Signals.h>
+
+EXTERN_C Kernel::Void int_handle_breakpoint(Kernel::UIntPtr rip);
+EXTERN_C BOOL         mp_handle_gic_interrupt_el0(Void);
+
+EXTERN_C BOOL  kEndOfInterrupt;
+EXTERN_C UInt8 kEndOfInterruptVector;
+
+STATIC BOOL kIsRunning = NO;
+
+/// @note This is managed by the system software.
+STATIC void hal_int_send_eoi(UInt8 vector) {
+  kEndOfInterrupt       = YES;
+  kEndOfInterruptVector = vector;
+}
+
+/// @brief Handle GPF fault.
+/// @param rsp
+EXTERN_C Kernel::Void int_handle_gpf(Kernel::UIntPtr rsp) {
+  auto process = Kernel::UserProcessScheduler::The().TheCurrentProcess();
+  process.Crash();
+
+  hal_int_send_eoi(13);
+
+  process.Signal.SignalArg = rsp;
+  process.Signal.SignalID  = SIGKILL;
+  process.Signal.Status    = process.Status;
+}
+
+/// @brief Handle page fault.
+/// @param rsp
+EXTERN_C void int_handle_pf(Kernel::UIntPtr rsp) {
+  auto process = Kernel::UserProcessScheduler::The().TheCurrentProcess();
+  process.Crash();
+
+  hal_int_send_eoi(14);
+
+  process.Signal.SignalArg = rsp;
+  process.Signal.SignalID  = SIGKILL;
+  process.Signal.Status    = process.Status;
+}
+
+/// @brief Handle scheduler interrupt.
+EXTERN_C void int_handle_scheduler(Kernel::UIntPtr rsp) {
+  NE_UNUSED(rsp);
+
+  hal_int_send_eoi(32);
+
+  while (kIsRunning);
+
+  kIsRunning = YES;
+
+  mp_handle_gic_interrupt_el0();
+
+  kIsRunning = NO;
+}
+
+/// @brief Handle math fault.
+/// @param rsp
+EXTERN_C void int_handle_math(Kernel::UIntPtr rsp) {
+  auto process = Kernel::UserProcessScheduler::The().TheCurrentProcess();
+  process.Crash();
+
+  hal_int_send_eoi(8);
+
+  process.Signal.SignalArg = rsp;
+  process.Signal.SignalID  = SIGKILL;
+  process.Signal.Status    = process.Status;
+}
+
+/// @brief Handle any generic fault.
+/// @param rsp
+EXTERN_C void int_handle_generic(Kernel::UIntPtr rsp) {
+  auto process = Kernel::UserProcessScheduler::The().TheCurrentProcess();
+  process.Crash();
+
+  hal_int_send_eoi(30);
+
+  Kernel::kout << "Kernel: Generic Process Fault.\r";
+
+  process.Signal.SignalArg = rsp;
+  process.Signal.SignalID  = SIGKILL;
+  process.Signal.Status    = process.Status;
+
+  Kernel::kout << "Kernel: SIGKILL status.\r";
+}
+
+EXTERN_C Kernel::Void int_handle_breakpoint(Kernel::UIntPtr rip) {
+  auto process = Kernel::UserProcessScheduler::The().TheCurrentProcess();
+
+  hal_int_send_eoi(3);
+
+  process.Signal.SignalArg = rip;
+  process.Signal.SignalID  = SIGTRAP;
+
+  process.Signal.Status = process.Status;
+
+  process.Status = Kernel::ProcessStatusKind::kFrozen;
+}
+
+/// @brief Handle #UD fault.
+/// @param rsp
+EXTERN_C void int_handle_ud(Kernel::UIntPtr rsp) {
+  auto process = Kernel::UserProcessScheduler::The().TheCurrentProcess();
+  process.Crash();
+
+  hal_int_send_eoi(6);
+
+  process.Signal.SignalArg = rsp;
+  process.Signal.SignalID  = SIGKILL;
+  process.Signal.Status    = process.Status;
+}
+
+/// @brief Enter syscall from assembly (libSystem only)
+/// @param stack the stack pushed from assembly routine.
+/// @return nothing.
+EXTERN_C Kernel::Void hal_system_call_enter(Kernel::UIntPtr rcx_hash,
+                                            Kernel::UIntPtr rdx_syscall_arg) {
+  hal_int_send_eoi(50);
+
+  if (!Kernel::kCurrentUser) return;
+
+  for (SizeT i = 0UL; i < kMaxDispatchCallCount; ++i) {
+    if (kSysCalls[i].fHooked && rcx_hash == kSysCalls[i].fHash) {
+      if (kSysCalls[i].fProc) {
+        (kSysCalls[i].fProc)((Kernel::VoidPtr) rdx_syscall_arg);
+      }
+    }
+  }
+}
+
+/// @brief Enter Kernel call from assembly (libDDK only).
+/// @param stack the stack pushed from assembly routine.
+/// @return nothing.
+EXTERN_C Kernel::Void hal_kernel_call_enter(Kernel::UIntPtr rcx_hash, Kernel::SizeT cnt,
+                                            Kernel::UIntPtr arg, Kernel::SizeT sz) {
+  if (!Kernel::kRootUser) return;
+  if (Kernel::kCurrentUser != Kernel::kRootUser) return;
+  if (!Kernel::kCurrentUser->IsSuperUser()) return;
+
+  for (SizeT i = 0UL; i < kMaxDispatchCallCount; ++i) {
+    if (kKernCalls[i].fHooked && rcx_hash == kKernCalls[rcx_hash].fHash) {
+      if (kKernCalls[i].fProc) {
+        (kKernCalls[i].fProc)(cnt, (Kernel::VoidPtr) arg, sz);
+      }
+    }
+  }
+}