feat!: Add IFS layer within DriveMgr, and IFS API.

also:

 - Use ThreadID in AP system.
 - Refactor kernel according to new IFS layer.

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

9 files changed, 42 insertions, 29 deletions

diff --git a/dev/kernel/ArchKit/ArchKit.h b/dev/kernel/ArchKit/ArchKit.h
index 08e8ab88..b6637ec1 100644
--- a/dev/kernel/ArchKit/ArchKit.h
+++ b/dev/kernel/ArchKit/ArchKit.h
@@ -77,8 +77,6 @@ struct HalSyscallEntry final {
   operator bool() { return fHooked; }
 };
 
-EXTERN_C Kernel::HAL::StackFramePtr mp_get_current_task(Kernel::Int64 pid);
-
 inline Kernel::Array<HalSyscallEntry, kMaxDispatchCallCount> kSysCalls;
 
 inline Kernel::Array<HalSyscallEntry, kMaxDispatchCallCount> kKernCalls;
diff --git a/dev/kernel/HALKit/AMD64/HalApplicationProcessor.cc b/dev/kernel/HALKit/AMD64/HalApplicationProcessor.cc
index 1fbf9fea..cb1ec59b 100644
--- a/dev/kernel/HALKit/AMD64/HalApplicationProcessor.cc
+++ b/dev/kernel/HALKit/AMD64/HalApplicationProcessor.cc
@@ -101,7 +101,7 @@ Void hal_send_ipi_msg(UInt32 target, UInt32 apic_id, UInt8 vector) {
 /// @param thrdid The thread ID.
 /***********************************************************************************/
 
-EXTERN_C HAL::StackFramePtr mp_get_current_task(Int64 thrdid) {
+EXTERN_C HAL::StackFramePtr mp_get_current_task(ThreadID thrdid) {
   if (thrdid > kSMPCount) return nullptr;
   return kHWThread[thrdid].mFramePtr;
 }
@@ -112,7 +112,7 @@ EXTERN_C HAL::StackFramePtr mp_get_current_task(Int64 thrdid) {
 /// @param thrdid The thread ID.
 /***********************************************************************************/
 
-EXTERN_C BOOL mp_register_task(HAL::StackFramePtr stack_frame, ProcessID thrdid) {
+EXTERN_C BOOL mp_register_task(HAL::StackFramePtr stack_frame, ThreadID thrdid) {
   if (thrdid > kSMPCount) return NO;
   if (!stack_frame) return NO;
 
diff --git a/dev/kernel/KernelKit/CodeMgr.h b/dev/kernel/KernelKit/CodeMgr.h
index f4d46b4b..072ba4d5 100644
--- a/dev/kernel/KernelKit/CodeMgr.h
+++ b/dev/kernel/KernelKit/CodeMgr.h
@@ -23,10 +23,10 @@ namespace Kernel {
 typedef void (*rtl_main_kind)(void);
 
 /// @brief C++ Constructor entrypoint.
-typedef void (*rtl_ctor_kind)(void);
+typedef void (*rtl_cxx_ctor_kind)(void);
 
 /// @brief C++ Destructor entrypoint.
-typedef void (*rtl_dtor_kind)(void);
+typedef void (*rtl_cxx_dtor_kind)(void);
 
 /// @brief Executes a new process from a function. Kernel code only.
 /// @note This sets up a new stack, anything on the main function that calls the Kernel will not be
diff --git a/dev/kernel/KernelKit/DriveMgr.h b/dev/kernel/KernelKit/DriveMgr.h
index 684e2e5c..4a530deb 100644
--- a/dev/kernel/KernelKit/DriveMgr.h
+++ b/dev/kernel/KernelKit/DriveMgr.h
@@ -23,6 +23,8 @@
 
 #define drv_sector_cnt(SIZE, SECTOR_SZ) (((SIZE) + (SECTOR_SZ)) / (SECTOR_SZ))
 
+#define kDriveHiddenPrefix '~'
+
 namespace Kernel {
 enum {
   kInvalidDrive = -1,
@@ -159,20 +161,6 @@ namespace Detect {
 Void io_drv_input(DriveTrait::DrivePacket pckt);
 
 Void io_drv_output(DriveTrait::DrivePacket pckt);
-
-/// @brief Read from IFS disk.
-/// @param Mnt mounted interface.
-/// @param DrvTrait drive info
-/// @param DrvIndex drive index.
-/// @return
-Int32 fs_ifs_read(MountpointInterface* Mnt, DriveTrait& DrvTrait, Int32 DrvIndex);
-
-/// @brief Write to IFS disk.
-/// @param Mnt mounted interface.
-/// @param DrvTrait drive info
-/// @param DrvIndex drive index.
-/// @return
-Int32 fs_ifs_write(MountpointInterface* Mnt, DriveTrait& DrvTrait, Int32 DrvIndex);
 }  // namespace Kernel
 
 #endif /* ifndef INC_DRIVE_MANAGER_H */
diff --git a/dev/kernel/KernelKit/IFS.h b/dev/kernel/KernelKit/IFS.h
new file mode 100644
index 00000000..5555764f
--- /dev/null
+++ b/dev/kernel/KernelKit/IFS.h
@@ -0,0 +1,25 @@
+/* -------------------------------------------
+
+  Copyright (C) 2024-2025, Amlal El Mahrouss, all rights reserved.
+
+------------------------------------------- */
+
+#pragma once
+
+#include <KernelKit/DriveMgr.h>
+
+namespace Kernel {
+/// @brief Read from IFS disk.
+/// @param Mnt mounted interface.
+/// @param DrvTrait drive info
+/// @param DrvIndex drive index.
+/// @return
+Int32 fs_ifs_read(MountpointInterface* Mnt, DriveTrait& DrvTrait, Int32 DrvIndex);
+
+/// @brief Write to IFS disk.
+/// @param Mnt mounted interface.
+/// @param DrvTrait drive info
+/// @param DrvIndex drive index.
+/// @return
+Int32 fs_ifs_write(MountpointInterface* Mnt, DriveTrait& DrvTrait, Int32 DrvIndex);
+}  // namespace Kernel
\ No newline at end of file
diff --git a/dev/kernel/amd64-desktop.make b/dev/kernel/amd64-desktop.make
index 49593101..21488782 100644
--- a/dev/kernel/amd64-desktop.make
+++ b/dev/kernel/amd64-desktop.make
@@ -5,7 +5,7 @@
 
 CXX			= x86_64-w64-mingw32-g++
 LD			= x86_64-w64-mingw32-ld
-CCFLAGS		= -fshort-wchar -c -D__NE_AMD64__  -D__NE_VEPM__ -Wall -Wpedantic -Wextra -mno-red-zone -fno-rtti -fno-exceptions -std=c++20 -D__FSKIT_INCLUDES_HEFS__ -D__NE_SUPPORT_NX__ -O0 -I../vendor -D__FSKIT_INCLUDES_NEFS__ -D__NEOSKRNL__ -D__HAVE_NE_APIS__ -D__FREESTANDING__ -D__NE_VIRTUAL_MEMORY_SUPPORT__ -D__NE_AUTO_FORMAT__ -D__NE__ -I./ -I../ -I../boot
+CCFLAGS		= -fshort-wchar -c -D__NE_AMD64__  -D__NE_VEPM__ -Wall -Wpedantic -Wextra -mno-red-zone -fno-rtti -fno-exceptions -std=c++20 -D__FSKIT_INCLUDES_HEFS__ -D__NE_SUPPORT_NX__ -O0 -I../vendor -D__NEOSKRNL__ -D__HAVE_NE_APIS__ -D__FREESTANDING__ -D__NE_VIRTUAL_MEMORY_SUPPORT__ -D__NE_AUTO_FORMAT__ -D__NE__ -I./ -I../ -I../boot
 
 ASM 		= nasm
 
diff --git a/dev/kernel/src/FS/NeFS+FileSystemParser.cc b/dev/kernel/src/FS/NeFS+FileSystemParser.cc
index 97b2ff36..dd0a1d9a 100644
--- a/dev/kernel/src/FS/NeFS+FileSystemParser.cc
+++ b/dev/kernel/src/FS/NeFS+FileSystemParser.cc
@@ -10,6 +10,7 @@
 #include <FirmwareKit/EPM.h>
 
 #include <KernelKit/DriveMgr.h>
+#include <KernelKit/IFS.h>
 #include <KernelKit/KPC.h>
 #include <KernelKit/ProcessScheduler.h>
 #include <KernelKit/UserMgr.h>
diff --git a/dev/kernel/src/DriveMgr+IO.cc b/dev/kernel/src/IFS.cc
index 9137c91e..ba2ec8c0 100644
--- a/dev/kernel/src/DriveMgr+IO.cc
+++ b/dev/kernel/src/IFS.cc
@@ -9,9 +9,9 @@
 
 /*************************************************************
  *
- * File: DriveMgr+IO.cc
+ * File: IFS.cc
  * Purpose: Filesystem to mountpoint interface.
- * Date: 3/26/24
+ * Date: 05/26/2025
  *
  * Copyright (C) 2024-2025, Amlal El Mahrouss, all rights reserved.
  *
@@ -23,13 +23,13 @@
 #define fsi_ifs_read(DRV, TRAITS, MP) (MP->DRV()).fInput(TRAITS)
 
 namespace Kernel {
-/// @brief Read from newfs disk.
+/// @brief Read from fs disk.
 /// @param Mnt mounted interface.
 /// @param DrvTrait drive info
 /// @param DrvIndex drive index.
 /// @return
 Int32 fs_ifs_read(MountpointInterface* Mnt, DriveTrait& DrvTrait, Int32 DrvIndex) {
-  if (!Mnt) return 1;
+  if (!Mnt) return kErrorDisk;
 
   DrvTrait.fPacket.fPacketGood = false;
 
@@ -52,16 +52,16 @@ Int32 fs_ifs_read(MountpointInterface* Mnt, DriveTrait& DrvTrait, Int32 DrvIndex
     }
   }
 
-  return DrvTrait.fPacket.fPacketGood;
+  return DrvTrait.fPacket.fPacketGood ? kErrorSuccess : kErrorDisk;
 }
 
-/// @brief Write to newfs disk.
+/// @brief Write to fs disk.
 /// @param Mnt mounted interface.
 /// @param DrvTrait drive info
 /// @param DrvIndex drive index.
 /// @return
 Int32 fs_ifs_write(MountpointInterface* Mnt, DriveTrait& DrvTrait, Int32 DrvIndex) {
-  if (!Mnt) return 1;
+  if (!Mnt) return kErrorDisk;
 
   DrvTrait.fPacket.fPacketGood = false;
 
@@ -84,6 +84,6 @@ Int32 fs_ifs_write(MountpointInterface* Mnt, DriveTrait& DrvTrait, Int32 DrvInde
     }
   }
 
-  return DrvTrait.fPacket.fPacketGood;
+  return DrvTrait.fPacket.fPacketGood ? kErrorSuccess : kErrorDisk;
 }
 }  // namespace Kernel
\ No newline at end of file
diff --git a/dev/kernel/src/UserProcessScheduler.cc b/dev/kernel/src/UserProcessScheduler.cc
index f900f984..4bbd085a 100644
--- a/dev/kernel/src/UserProcessScheduler.cc
+++ b/dev/kernel/src/UserProcessScheduler.cc
@@ -126,6 +126,7 @@ ErrorOr<VoidPtr> USER_PROCESS::New(SizeT sz, SizeT pad_amount) {
 
 #ifdef __NE_VIRTUAL_MEMORY_SUPPORT__
   auto vm_register = kKernelVM;
+
   hal_write_cr3(this->VMRegister);
 
   auto ptr = mm_alloc_ptr(sz, Yes, Yes, pad_amount);