feat: custom objc runtime, msgSend, and HOTObject experiment

fix(scheduler/spawn): now its doesnt OSPanic's when VMHeapAllocate returned nullptr for stackBaseAddress. It wakes up GC, tries again and if it failed return nullptr

.clangd

@@ -0,0 +1,4 @@
+If:
+  PathMatch: .*\.h
+CompileFlags:
+  Add: [-x, objective-c]

.gitignore

@@ -2,4 +2,6 @@
 build*
 .venv
 initrd/image.cpio
-initramfs/*
+initramfs/*
+
+target

.tokeignore

@@ -3,7 +3,7 @@ build
 .venv
 kernel/data
 *.md
-tools/
 bootloader/
 bootloader/src/uefi
-initramfs/
+initramfs/
+kernel/inc/Data

CMakeLists.txt

@@ -30,23 +30,28 @@ add_subdirectory(bootloader)
 add_subdirectory(kernel)
 add_subdirectory(userspace)
 
+set(SYSTEM_SERVICES
+    init
+    debug
+    termosh
+    testOBJC
+)
+
+set(VOLUME_ROOT "${CMAKE_BINARY_DIR}/StartupVolume")
+set(INITRAMFS_CPIO_FILE "${CMAKE_BINARY_DIR}/StartupVolume.cpio")
+set(IMG_FILE "${CMAKE_BINARY_DIR}/termOS.img")
+
 if(MCOPY_EXE AND MKFS_EXE AND CPIO_EXE)
-    set(IMG_FILE "${CMAKE_BINARY_DIR}/termOS.img")
-    
-    set(INITRAMFS_SRC_DIR "${CMAKE_SOURCE_DIR}/initramfs")
-    set(INITRAMFS_CPIO_FILE "${CMAKE_BINARY_DIR}/initramfs.cpio")
-    file(GLOB_RECURSE INIT_FILES "${INITRAMFS_SRC_DIR}/*")
-
-    add_custom_command(
+add_custom_command(
         OUTPUT ${INITRAMFS_CPIO_FILE}
-        COMMAND ${CMAKE_COMMAND} -E make_directory ${CMAKE_BINARY_DIR}
+        COMMAND ${CMAKE_COMMAND} -E make_directory ${VOLUME_ROOT}
         COMMAND sh -c "find . -mindepth 1 ! -name '*.cpio' -print0 | ${CPIO_EXE} --null -ov -H newc > \"${INITRAMFS_CPIO_FILE}\""
-        WORKING_DIRECTORY ${INITRAMFS_SRC_DIR}
-        DEPENDS ${INIT_FILES} init
+        WORKING_DIRECTORY ${VOLUME_ROOT}
+        DEPENDS ${SYSTEM_SERVICES}
         VERBATIM
-        COMMENT "Packing initramfs to cpio..."
+        COMMENT "Packing StartupVolume to cpio..."
     )
-
+    
     add_custom_command(
         OUTPUT ${IMG_FILE}
         COMMAND dd if=/dev/zero of=${IMG_FILE} bs=1M count=64 status=none
@@ -54,7 +59,7 @@ if(MCOPY_EXE AND MKFS_EXE AND CPIO_EXE)
         COMMAND mmd -i ${IMG_FILE} ::/EFI ::/EFI/BOOT
         COMMAND ${MCOPY_EXE} -i ${IMG_FILE} $<TARGET_FILE:BOOTX64> ::/EFI/BOOT/BOOTX64.EFI
         COMMAND ${MCOPY_EXE} -i ${IMG_FILE} ${CMAKE_BINARY_DIR}/bin/kernel.bin ::/kernel.bin
-        COMMAND ${MCOPY_EXE} -i ${IMG_FILE} ${INITRAMFS_CPIO_FILE} ::/initramfs.cpio
+        COMMAND ${MCOPY_EXE} -i ${IMG_FILE} ${INITRAMFS_CPIO_FILE} ::/StartupVolume.cpio
         DEPENDS BOOTX64 kernel ${INITRAMFS_CPIO_FILE}
         VERBATIM
         COMMENT "Generating bootable image: ${IMG_FILE}"

README.md

@@ -4,6 +4,39 @@
     <img src='assets/logo.png'>
 </p>
 
-Just a hobby, won't be big and professional like Linux
+> "Just a hobby, won't be big and professional like Linux."  
+> — *Linus Torvalds (and now me)*
 
-Really WIP. And really just a hobby.
+**termOS** is a 64-bit, UNIX-hating, bespoke operating system written from scratch in C.
+
+Current Kernel: **Dewar** (v0.5.x)
+
+## Philosophy
+
+- **Zero Bloat:** We don't port libraries; we write them.
+- **Custom Everything:** Why use ELF when you can invent **HOT!**? Why use GRUB when you can write your own bootloader (soon)?
+
+## Features (v0.5.2)
+
+- **Architecture:** x86_64 / UEFI.
+- **Memory Management:** PMM (Bitmap), VMM (PML4 + Higher Half Direct Map), Kernel Heap.
+- **Multitasking:** Preemptive scheduler with Round Robin.
+- **Isolation:** Ring 0 (Kernel) / Ring 3 (Userspace) protection.
+- **Binaries:** Custom **HOT!** executable format (parsed via custom `elf2hot` toolchain).
+- **Filesystem:** VFS abstraction with CPIO Initramfs support.
+- **Graphics:** `ShitGUI` (yes, really) linear framebuffer driver.
+- **Shell:** `ksh` (Kernel Shell) -> transitioning to userspace `ush`
+
+## 🔥 The HOT! Format
+
+termOS uses its own executable format called **HOT!**.
+Because parsing ELF headers is too mainstream. HOT! is a flat, segment-based format designed specifically for the Dewar kernel loader.
+Made only because ELF is *Not-invented-here*
+
+## Roadmap
+
+See [ROADMAP.md](ROADMAP.md) for the detailed plan of world domination (or at least self-hosting).
+
+## License
+
+**GPL-3.0-or-later**.

ROADMAP.md

@@ -0,0 +1,103 @@
+# termOS Roadmap
+
+## Legend
+- ✅ **Done**: Implemented and working.
+- 🚧 **WIP**: Currently under active development.
+- 📅 **Planned**: Scheduled for future releases.
+- 🤔 **Vision**: Long-term goals for v1.0.
+
+---
+
+## Current Status: v0.5.3 (Alpha)
+*Where we are now.*
+- **Core:** Ring 0 / Ring 3 isolation implemented.
+- **Mem:** PMM (bitmap), VMM (PML4, HHDM).
+- **Exec:** Custom **HOT!** executable format (static loader).
+- **FS:** VFS + Initramfs (CPIO, read-only).
+- **User:** Basic jump to userspace (hardcoded stack, no heap yet).
+
+---
+
+## 📅 Phase 1
+*Goal: Transform the decorative userspace into a functional mechanism.*
+
+### v0.5.4 (The Shell Update)
+*Focus: Interactive Userspace*
+- [x] **Userspace Shell (`termosh`)**
+    - Porting `ksh` logic into a standalone `.hot` binary.
+    - Standard I/O abstraction (stdin/stdout) to pass keyboard input to active process.
+- [ ] ~~**Basic Utils** (`ls`, `cat`, `echo`)~~ *(Moved to v0.6.1 — awaiting Apple-style API)*
+
+
+---
+
+## 📅 Phase 2
+*Goal: Total independence from external libraries and architectural hygiene.*
+
+### v0.6.0 (Architecture Overhaul)
+- [ ] **System-wide Naming & API Refactoring (Apple-style)**
+    - Replace generic types with PascalCase branding (`u64` -> `UInt64`, `i32` -> `Int32`).
+    - Standardize system prefixes: `VM` for Virtual Memory, `OS` for Core, `CPU` for HAL.
+    - Transition from `snake_case` to `PascalCase` for all kernel functions and structures.
+    - Implement `OSReturn` status codes for unified error handling.
+- [ ] **Bootloader Independence**
+    - Remove `posix-uefi` library.
+    - Write custom UEFI entry point (pure PE).
+    - Kernel itself becomes a valid `.hot` executable.
+- [ ] **HOT! Format Hardening**
+    - Fix segment alignment (Page Alignment) in `elf2hot` and kernel loader.
+    - Add metadata headers (stack size, permissions).
+- [ ] **Concurrency Fixes**
+    - Implement spinlocks (`spinlock`).
+    - Protect allocator and process lists from interrupt race conditions.
+
+---
+
+## 📅 Phase 3
+*Goal: Prepare the environment for self-hosting. We cannot compile on a Read-Only FS.*
+
+### v0.7.0 (Filesystem & Input)
+- [ ] **Write Support**
+    - Storage driver (NVMe/AHCI or Writable RAMDisk).
+    - Writable Filesystem (FAT32 or custom simple FS).
+- [ ] **Input Subsystem**
+    - Input buffering, Pipe (`|`) support in shell.
+    - Basic TTY/PTY abstraction.
+
+### v0.8.0 (The Editor)
+- [ ] **Text Editor**
+    - Write a simple editor (nano-like) in userspace.
+    - Capabilities: Open, Edit, Save files.
+
+---
+
+## 📅 Phase 4
+*Goal: Self-Hosting.*
+
+### v0.9.0 (The Toolchain)
+- [ ] **Linker (`hld`)**
+    - Native linker capable of outputting `.hot` files (running inside termOS).
+- [ ] **Compiler Port**
+    - Port **TCC (Tiny C Compiler)** to termOS.
+    - Adapt libc headers for the OS environment.
+
+### 🤔 v1.0.0 (Self-Hosting)
+- [ ] **Bootstrapping**
+    - Compile the Dewar kernel *inside* termOS.
+    - Boot from the newly compiled kernel.
+    - Total victory.
+
+---
+
+## 📜 History
+
+| Version | Date | Key Features |
+| :--- | :--- | :--- |
+| **v0.5.3** | 2026-01-30 | `sys_mem`, `sys_spawn`, `sys_wait`, `sys_exit` |
+| **v0.5.2** | 2026-01-30 | **HOT!** format, Ring 3 isolation, VFS, CPIO parsing. |
+| **v0.5.1** | 2026-01-29 | Initial userspace jumps, syscall mechanics. |
+| **v0.5.0** | 2026-01-29 | Kernel officially named "Dewar". Versioning standardized. |
+| **v0.4.x** | 2026-01-28 | Basic VFS, Shell improvements, basic multitasking. |
+| **v0.3.x** | 2025-12-30 | Scheduler, ~~Composer~~, Heap manager. |
+| **v0.2.x** | 2025-12-28 | `ksh`, Keyboard driver, HHDM, PMM/VMM. |
+| **v0.1.x** | 2025-12-21 | First boot, GDT/IDT, Serial/Console, Panic handler. |

bootloader/src/main.c

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2025 0xKarinyash
+// Copyright (c) 2026 0xKarinyash
 
 #include "uefi.h" // IWYU pragma: keep
 #include "../../common/bootinfo.h"
@@ -78,11 +78,11 @@ int main()
     efi_file_handle_t* initramfs_file;
     uintn_t iinfo_size = 0;
     efi_file_info_t* ifile_info = nullptr;
-    status = root->Open(root, &initramfs_file, L"initramfs.cpio", EFI_FILE_MODE_READ, 0);
+    status = root->Open(root, &initramfs_file, L"StartupVolume.cpio", EFI_FILE_MODE_READ, 0);
     
     if (EFI_ERROR(status)) {
-        print_initramfs_warning(L"initramfs.cpio is missing");
-        boot_info->initramfs.addr = nullptr;
+        print_initramfs_warning(L"StartupVolume.cpio is missing");
+        boot_info->initramfs.address = nullptr;
         boot_info->initramfs.size = 0;
     } else {
         status = initramfs_file->GetInfo(initramfs_file, &fi_guid, &iinfo_size, nullptr);
@@ -105,14 +105,14 @@ int main()
                 // just fucking kill me
                 uintn_t initramfs_size_read = (uintn_t)initramfs_size;
                 initramfs_file->Read(initramfs_file, &initramfs_size_read, (void*)initramfs_addr);
-                boot_info->initramfs.addr = (void*)initramfs_addr;
+                boot_info->initramfs.address = (void*)initramfs_addr;
                 boot_info->initramfs.size = initramfs_size;
             }
         }
     }
 
     boot_info->framebuffer.base = (uint32_t*)gop->Mode->FrameBufferBase;
-    boot_info->framebuffer.base_size = gop->Mode->FrameBufferSize;
+    boot_info->framebuffer.baseSize = gop->Mode->FrameBufferSize;
     boot_info->framebuffer.height = gop->Mode->Information->VerticalResolution;
     boot_info->framebuffer.width = gop->Mode->Information->HorizontalResolution;
     boot_info->framebuffer.pitch = gop->Mode->Information->PixelsPerScanLine;
@@ -139,11 +139,11 @@ int main()
             break;
         }
         
-        boot_info->mem.descriptor_size = desc_size;
-        boot_info->mem.descriptor_version = desc_version;
-        boot_info->mem.map_size = map_size;
-        boot_info->mem.map_key = map_key;
-        boot_info->mem.map = map;
+        boot_info->memoryMap.descriptorSize = desc_size;
+        boot_info->memoryMap.descriptorVersion = desc_version;
+        boot_info->memoryMap.mapSize = map_size;
+        boot_info->memoryMap.mapKey = map_key;
+        boot_info->memoryMap.map = map;
 
         status = gBS->ExitBootServices(IM, map_key);
         if (status == EFI_SUCCESS) {

bootloader/src/uefi/stdio.c

@@ -46,7 +46,7 @@ void __stdio_cleanup(void)
         BS->FreePool(__argvutf8);
 #endif
     if(__blk_devs) {
-        free(__blk_devs);
+        MemoryFree(__blk_devs);
         __blk_devs = NULL;
         __blk_ndevs = 0;
     }
@@ -127,7 +127,7 @@ int fclose (FILE *__stream)
         if(__stream == (FILE*)__blk_devs[i].bio)
             return 1;
     status = __stream->Close(__stream);
-    free(__stream);
+    MemoryFree(__stream);
     return !EFI_ERROR(status);
 }
 
@@ -188,7 +188,7 @@ err:    __stdio_seterrno(status);
         return -1;
     }
     /* no need for fclose(f); */
-    free(f);
+    MemoryFree(f);
     return 0;
 }
 
@@ -250,7 +250,7 @@ FILE *fopen (const char_t *__filename, const char_t *__modes)
                 /* workaround a bug in TianoCore, it reports zero size even though the data is in the buffer */
                 if(handle_size < 1)
                     handle_size = (uintn_t)sizeof(handles) / sizeof(efi_handle_t);
-                __blk_devs = (block_file_t*)malloc(handle_size * sizeof(block_file_t));
+                __blk_devs = (block_file_t*)MemoryAllocate(handle_size * sizeof(block_file_t));
                 if(__blk_devs) {
                     memset(__blk_devs, 0, handle_size * sizeof(block_file_t));
                     for(i = __blk_ndevs = 0; i < handle_size; i++)
@@ -276,7 +276,7 @@ FILE *fopen (const char_t *__filename, const char_t *__modes)
         errno = ENODEV;
         return NULL;
     }
-    ret = (FILE*)malloc(sizeof(FILE));
+    ret = (FILE*)MemoryAllocate(sizeof(FILE));
     if(!ret) return NULL;
     /* normally write means read,write,create. But for remove (internal '*' mode), we need read,write without create
      * also mode 'w' in POSIX means write-only (without read), but that's not working on certain firmware, we must
@@ -292,16 +292,16 @@ FILE *fopen (const char_t *__filename, const char_t *__modes)
         __modes[1] == CL('d') ? EFI_FILE_DIRECTORY : 0);
     if(EFI_ERROR(status)) {
 err:    __stdio_seterrno(status);
-        free(ret); return NULL;
+        MemoryFree(ret); return NULL;
     }
     if(__modes[0] == CL('*')) return ret;
     status = ret->GetInfo(ret, &infGuid, &fsiz, &info);
     if(EFI_ERROR(status)) goto err;
     if(__modes[1] == CL('d') && !(info.Attribute & EFI_FILE_DIRECTORY)) {
-        ret->Close(ret); free(ret); errno = ENOTDIR; return NULL;
+        ret->Close(ret); MemoryFree(ret); errno = ENOTDIR; return NULL;
     }
     if(__modes[1] != CL('d') && (info.Attribute & EFI_FILE_DIRECTORY)) {
-        ret->Close(ret); free(ret); errno = EISDIR; return NULL;
+        ret->Close(ret); MemoryFree(ret); errno = EISDIR; return NULL;
     }
     if(__modes[0] == CL('a')) fseek(ret, 0, SEEK_END);
     if(__modes[0] == CL('w')) {
@@ -713,7 +713,7 @@ int sprintf(char_t *dst, const char_t* fmt, ...)
     return ret;
 }
 
-int snprintf(char_t *dst, size_t maxlen, const char_t* fmt, ...)
+int StringFormat(char_t *dst, size_t maxlen, const char_t* fmt, ...)
 {
     int ret;
     __builtin_va_list args;
@@ -738,7 +738,7 @@ int vprintf(const char_t* fmt, __builtin_va_list args)
     return ret;
 }
 
-int printf(const char_t* fmt, ...)
+int ConsolePrint(const char_t* fmt, ...)
 {
     int ret;
     __builtin_va_list args;
@@ -800,7 +800,7 @@ int getchar_ifany (void)
     return EFI_ERROR(status) ? 0 : key.UnicodeChar;
 }
 
-int getchar (void)
+int ConsoleGetCharacter (void)
 {
     uintn_t idx;
     BS->WaitForEvent(1, &ST->ConIn->WaitForKey, &idx);

bootloader/src/uefi/stdlib.c

@@ -77,7 +77,7 @@ int64_t strtol (const char_t *s, char_t **__endptr, int __base)
     return v * sign;
 }
 
-void *malloc (size_t __size)
+void *MemoryAllocate (size_t __size)
 {
     void *ret = NULL;
     efi_status_t status;
@@ -106,20 +106,20 @@ void *malloc (size_t __size)
 
 void *calloc (size_t __nmemb, size_t __size)
 {
-    void *ret = malloc(__nmemb * __size);
+    void *ret = MemoryAllocate(__nmemb * __size);
     if(ret) memset(ret, 0, __nmemb * __size);
     return ret;
 }
 
-void *realloc (void *__ptr, size_t __size)
+void *MemoryReallocate (void *__ptr, size_t __size)
 {
     void *ret = NULL;
     efi_status_t status;
 #ifndef UEFI_NO_TRACK_ALLOC
     uintn_t i;
 #endif
-    if(!__ptr) return malloc(__size);
-    if(!__size) { free(__ptr); return NULL; }
+    if(!__ptr) return MemoryAllocate(__size);
+    if(!__size) { MemoryFree(__ptr); return NULL; }
 #ifndef UEFI_NO_TRACK_ALLOC
     /* get the slot which stores the old size for this buffer */
     for(i = 0; i < __stdlib_numallocs && __stdlib_allocs[i] != (uintptr_t)__ptr; i += 2);
@@ -145,7 +145,7 @@ void *realloc (void *__ptr, size_t __size)
     return ret;
 }
 
-void free (void *__ptr)
+void MemoryFree (void *__ptr)
 {
     efi_status_t status;
 #ifndef UEFI_NO_TRACK_ALLOC
@@ -341,7 +341,7 @@ uint8_t *getenv(char_t *name, uintn_t *len)
 #else
     status = RT->GetVariable(name, &globGuid, &attr, len, &tmp);
 #endif
-    if(EFI_ERROR(status) || *len < 1 || !(ret = malloc((*len) + 1))) {
+    if(EFI_ERROR(status) || *len < 1 || !(ret = MemoryAllocate((*len) + 1))) {
         *len = 0;
         return NULL;
     }

bootloader/src/uefi/string.c

@@ -116,7 +116,7 @@ void *memrmem(const void *haystack, size_t hl, const void *needle, size_t nl)
     return NULL;
 }
 
-char_t *strcpy(char_t *dst, const char_t *src)
+char_t *StringCopy(char_t *dst, const char_t *src)
 {
     char_t *s = dst;
     if(src && dst && src != dst) {
@@ -178,7 +178,7 @@ int strncmp(const char_t *s1, const char_t *s2, size_t n)
 char_t *strdup(const char_t *s)
 {
     size_t i = (strlen(s)+1) * sizeof(char_t);
-    char_t *s2 = (char_t *)malloc(i);
+    char_t *s2 = (char_t *)MemoryAllocate(i);
     if(s2 != NULL) memcpy(s2, (const void*)s, i);
     return s2;
 }

bootloader/src/uefi/uefi.h

@@ -1314,10 +1314,10 @@ typedef int (*__compar_fn_t) (const void *, const void *);
 extern int atoi (const char_t *__nptr);
 extern int64_t atol (const char_t *__nptr);
 extern int64_t strtol (const char_t *__nptr, char_t **__endptr, int __base);
-extern void *malloc (size_t __size);
+extern void *MemoryAllocate (size_t __size);
 extern void *calloc (size_t __nmemb, size_t __size);
-extern void *realloc (void *__ptr, size_t __size);
-extern void free (void *__ptr);
+extern void *MemoryReallocate (void *__ptr, size_t __size);
+extern void MemoryFree (void *__ptr);
 extern void abort (void);
 extern void exit (int __status);
 /* exit Boot Services function. Returns 0 on success. */
@@ -1355,14 +1355,14 @@ extern int fseek (FILE *__stream, long int __off, int __whence);
 extern long int ftell (FILE *__stream);
 extern int feof (FILE *__stream);
 extern int fprintf (FILE *__stream, const char_t *__format, ...);
-extern int printf (const char_t *__format, ...);
+extern int ConsolePrint (const char_t *__format, ...);
 extern int sprintf (char_t *__s, const char_t *__format, ...);
 extern int vfprintf (FILE *__s, const char_t *__format, __builtin_va_list __arg);
 extern int vprintf (const char_t *__format, __builtin_va_list __arg);
 extern int vsprintf (char_t *__s, const char_t *__format, __builtin_va_list __arg);
-extern int snprintf (char_t *__s, size_t __maxlen, const char_t *__format, ...);
+extern int StringFormat (char_t *__s, size_t __maxlen, const char_t *__format, ...);
 extern int vsnprintf (char_t *__s, size_t __maxlen, const char_t *__format, __builtin_va_list __arg);
-extern int getchar (void);
+extern int ConsoleGetCharacter (void);
 /* non-blocking, only returns UNICODE if there's any key pressed, 0 otherwise */
 extern int getchar_ifany (void);
 extern int putchar (int __c);
@@ -1376,7 +1376,7 @@ extern void *memchr(const void *__s, int __c, size_t __n);
 extern void *memrchr(const void *__s, int __c, size_t __n);
 void *memmem(const void *haystack, size_t hl, const void *needle, size_t nl);
 void *memrmem(const void *haystack, size_t hl, const void *needle, size_t nl);
-extern char_t *strcpy (char_t *__dest, const char_t *__src);
+extern char_t *StringCopy (char_t *__dest, const char_t *__src);
 extern char_t *strncpy (char_t *__dest, const char_t *__src, size_t __n);
 extern char_t *strcat (char_t *__dest, const char_t *__src);
 extern char_t *strncat (char_t *__dest, const char_t *__src, size_t __n);

common/bootinfo.h

@@ -1,37 +1,37 @@
 // SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2025 0xKarinyash
+// Copyright (c) 2026 0xKarinyash
 
 #pragma once
 
-typedef unsigned int       bi_u32;
-typedef unsigned long long bi_u64; 
+typedef unsigned int       BIUInt32;
+typedef unsigned long long BIUInt64; 
 
 typedef struct {
-    bi_u32* base;
-    bi_u64 base_size;
-    bi_u64 width;
-    bi_u64 height;
-    bi_u64 pitch;
-} BI_Framebuffer;
+    BIUInt32* base;
+    BIUInt64 baseSize;
+    BIUInt64 width;
+    BIUInt64 height;
+    BIUInt64 pitch;
+} BIFramebuffer;
 
 typedef struct {
     void* map;             
-    bi_u64 map_size;       
-    bi_u64 descriptor_size;
-    bi_u32 map_key;
-    bi_u32 descriptor_version;
-} BI_MemoryMap;
+    BIUInt64 mapSize;       
+    BIUInt64 descriptorSize;
+    BIUInt32 mapKey;
+    BIUInt32 descriptorVersion;
+} BIMemoryMap;
 
 typedef struct {
-    void* addr;
-    bi_u64 size;
-} BI_Initramfs;
+    void* address;
+    BIUInt64 size;
+} BIInitramfs;
 
 typedef struct {
-    bi_u64 magic;
-    BI_Framebuffer framebuffer;
-    BI_MemoryMap mem;
-    BI_Initramfs initramfs;
+    BIUInt64 magic;
+    BIFramebuffer framebuffer;
+    BIMemoryMap memoryMap;
+    BIInitramfs initramfs;
 } Bootinfo;
 
 #define BOOTINFO_MAGIC 0x7465726D // term

common/hot_header.h

@@ -0,0 +1,23 @@
+typedef unsigned char      UInt8;
+typedef unsigned short     UInt16;
+typedef unsigned int       UInt32;
+typedef unsigned long long UInt64; 
+
+#define HOT_MAGIC 0x21544F48
+
+typedef struct HOTSegment {
+    UInt64 type; // 1 = rx 2 = rw
+    UInt64 vaddr; 
+    UInt64 offset;
+    UInt64 filesz;
+    UInt64 memsz;
+} HOTSegment;
+
+typedef struct HOTHeader {
+    UInt32 magic; // "HOT!"
+    UInt8 version; // 1
+    UInt8 reserved_pad[3];
+    UInt64 entry_point;
+    UInt64 segments_count;
+    UInt64 reserved;
+} HOTHeader;

kernel/CMakeLists.txt

@@ -18,13 +18,16 @@ file(GLOB_RECURSE KERNEL_SOURCES CMAKE_CONFIGURE_DEPENDS
     "src/arch/${ARCH}/*.c"
     "src/arch/${ARCH}/*.asm"
 
-    "src/core/*.c"
-    "src/drivers/*.c"
-    "src/mm/*.c"
-    "src/shell/*.c"
-    "src/fs/*.c"
+    "src/OS/*.c"
+    "src/OS/Exec/*.c"
+    "src/OS/Services/*.c"
+    "src/lib/*.c"
+    "src/IO/*.c"
+    "src/VM/*.c"
+    "src/KSH/*.c"
+    "src/FS/*.c"
     
-    "data/*.c"
+    "Data/*.c"
 )
 
 add_executable(kernel ${KERNEL_SOURCES})
@@ -33,7 +36,7 @@ target_include_directories(kernel PRIVATE
     "${CMAKE_CURRENT_SOURCE_DIR}/../common"
     "${CMAKE_CURRENT_SOURCE_DIR}/inc"
     "${CMAKE_CURRENT_SOURCE_DIR}/inc/arch/${ARCH}"
-    "${CMAKE_CURRENT_SOURCE_DIR}/data"
+    "${CMAKE_CURRENT_SOURCE_DIR}/Data"
 )
 
 target_compile_options(kernel PRIVATE

kernel/inc/Data/VGAFont.h

@@ -1,8 +1,8 @@
-// font8x16 bitmap font
-// Source: https://github.com/hubenchang0515/font8x16
-// License: MIT
+#pragma once
+#include <types.h>
 
-unsigned char font8x16[][16] = {
+
+unsigned char VGAFont[][16] = {
     { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  },       //0x00, 
     { 0x00, 0x00, 0x7E, 0x81, 0xA5, 0x81, 0x81, 0xBD, 0x99, 0x81, 0x81, 0x7E, 0x00, 0x00, 0x00, 0x00,  },       //0x01, 
     { 0x00, 0x00, 0x7E, 0xFF, 0xDB, 0xFF, 0xFF, 0xC3, 0xE7, 0xFF, 0xFF, 0x7E, 0x00, 0x00, 0x00, 0x00,  },       //0x02, 

kernel/inc/Data/cats.h

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2025 0xKarinyash
+// Copyright (c) 2026 0xKarinyash
 // cats licensed to their authors
 // i took it from https://www.asciiart.eu/animals/cats
 

kernel/inc/Data/logo.h

@@ -1,14 +1,14 @@
 // Huge thanks to https://t.me/kinolenta2004 for this amazing logo
 // SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2025 0xKarinyash
+// Copyright (c) 2026 0xKarinyash
 
 #pragma once
-#include <drivers/shitgui.h>
+#include <IO/IOGraphics.h>
 
 #define LOGO_TRANSPARENCY_KEY 0xFF00FF
 
 // Image: 100x100
-static const u32 logo_data[] = {
+static const UInt32 logo_data[] = {
 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF,
 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF,
 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF,
@@ -1261,8 +1261,7 @@ static const u32 logo_data[] = {
 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF,
 };
 
-static SG_Image logo_img = {
-    .width = 100,
-    .height = 100,
-    .buffer = (u32*)logo_data
+static IOGraphicsImage logoImage = {
+    .size = {100, 100},
+    .buffer = (UInt32*)logo_data
 };

kernel/inc/FS/CPIO.h

@@ -0,0 +1,9 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#pragma once
+#include <types.h>
+#include <FS/VFS.h>
+
+UInt64   FSCPIORead(FSVNode* node, UInt64 offset, UInt64 size, UInt8* buffer);
+FSVNode* FSCPIOMount(void* baseAddress, UInt64 totalSize);

kernel/inc/FS/VFS.h

@@ -0,0 +1,42 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#pragma once
+#include <types.h>
+
+typedef enum FSVNodeFlags {
+    kFSVNodeFlagFile      = 0x01,
+    kFSVNodeFlagDirectory = 0x02,
+} FSVNodeFlags;
+
+typedef struct FSVNode FSVNode;
+
+typedef struct FSVNodeOperations {
+    UInt64  (*read)(FSVNode* node, UInt64 offset, UInt64 size, UInt8* buffer);
+    UInt64  (*write)(FSVNode* node, UInt64 offset, UInt64 size, UInt8* buffer);
+    void    (*open)(FSVNode* node);
+    void    (*close)(FSVNode* node);
+    FSVNode* (*findDirectory)(FSVNode* node, char* name);
+} FSVNodeOperations;
+
+typedef struct FSVNode {
+    char                name[256];
+    UInt32              protectionMask;
+    UInt32              ownerIdentifier;
+    UInt32              groupIdentifier;
+    UInt32              flags;
+    UInt32              inodeIdentifier;
+    UInt64              dataLength;
+    
+    FSVNodeOperations*  operations;
+    void*               implementationData; 
+    
+    struct FSVNode*     mountPoint;
+    struct FSVNode*     childNode;
+    struct FSVNode*     nextNode; 
+} FSVNode;
+
+void    FSVirtualFileSystemInitialize(FSVNode* rootNode);
+UInt64  FSVNodeRead(FSVNode* node, UInt64 offset, UInt64 size, UInt8* buffer);
+FSVNode* FSVirtualFileSystemOpenPath(const char* path);
+void    FSVNodeClose(FSVNode* node);

kernel/inc/IO/IOConsole.h

@@ -0,0 +1,35 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#pragma once
+#include <IO/IOGraphics.h>
+
+enum {
+    kIOConsoleColorRed       = 0xFF5555,
+    kIOConsoleColorVeryRed   = 0xFF0000,
+    kIOConsoleColorGreen     = 0x08bf39,
+    kIOConsoleColorVeryGreen = 0x00FF00,
+    kIOConsoleColorTurqoise  = 0x5effaf,
+    kIOConsoleColorBlue      = 0x5555FF,
+    kIOConsoleColorVeryBlue  = 0x0000FF,
+    kIOConsoleColorLightBlue = 0x3890e8,
+    kIOConsoleColorYellow    = 0xFFFF55,
+    kIOConsoleColorCyan      = 0x55FFFF,
+    kIOConsoleColorMagneta   = 0xFF55FF,
+    kIOConsoleColorBlack     = 0x000000,
+    kIOConsoleColorWhite     = 0xFFFFFF,
+    kIOConsoleColorPink      = 0xFFA3B1,
+};
+
+void IOConsoleInit(IOGraphicsContext* context);
+UInt64 IOConsoleGetColors();
+void IOConsoleClear(IOGraphicsColor color);
+IOGraphicsContext* IOConsoleGetGraphicsContext();
+IOGraphicsSize IOConsoleGetDimensions();
+void IOConsoleSetForegroundColor(IOGraphicsColor color);
+void IOConsoleSetDefaultForegroundColor(UInt32 color);
+void IOConsoleSetCursorPosition(IOGraphicsPoint* point);
+void IOConsoleReadLine(char* buffer, UInt32 limit);
+void IOConsolePutcharacter(char character);
+void IOConsolePrint(const char *string);
+void IOConsoleLog(const char *fmt, ...);

kernel/inc/IO/IOGraphics.h

@@ -0,0 +1,50 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+// RIP shitgui -- you started it all
+
+#pragma once
+#include <types.h>
+
+typedef UInt32 IOGraphicsColor;
+
+typedef struct { 
+    UInt32 x;
+    UInt32 y;
+} IOGraphicsPoint;
+
+typedef struct { 
+    UInt32 width;
+    UInt32 height;
+} IOGraphicsSize;
+
+typedef struct {
+    volatile UInt32* framebuffer;
+    IOGraphicsSize dimensions;
+    UInt32 pixelsPerScanLine;
+} IOGraphicsContext;
+
+typedef struct {
+    IOGraphicsColor* buffer;
+    IOGraphicsSize size;
+} IOGraphicsImage;
+
+typedef struct {
+    IOGraphicsSize size;
+    const unsigned char* baseAddress;
+} IOGraphicsFont;
+
+
+UInt32 IOGraphicsGetPixel(IOGraphicsContext* context, IOGraphicsPoint* point);
+
+void IOGraphicsDrawImage(IOGraphicsContext* context, IOGraphicsPoint* point, IOGraphicsImage* image);
+
+void IOGraphicsDrawRectangle(IOGraphicsContext* context, IOGraphicsPoint* point, 
+                            IOGraphicsSize* size, IOGraphicsColor color);
+
+void IOGraphicsDrawCharacter(
+    IOGraphicsContext* context, 
+    IOGraphicsPoint* point, 
+    char character, 
+    IOGraphicsColor color, 
+    IOGraphicsFont* font
+);

kernel/inc/IO/IOKeyboard.h

@@ -0,0 +1,22 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#pragma once
+#include <types.h>
+#include <OS/OSSpinlock.h>
+
+enum {
+    kIOKeyboardBufferSize = 256,
+};
+
+typedef struct { 
+    OSSpinlock lock;
+    char buffer[kIOKeyboardBufferSize];
+    volatile UInt16 head;
+    volatile UInt16 tail;
+} IOKeyboardController;
+
+extern IOKeyboardController gIOKeyboardController;
+
+void IOKeyboardInterruptsHandler();
+char IOKeyboardGetCharacter();

kernel/inc/IO/IOSerial.h

@@ -0,0 +1,8 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#pragma once
+
+int IOSerialInit();
+void IOSerialWriteChar(char character);
+void IOSerialWrite(const char *string);

kernel/inc/IO/IOTimer.h

@@ -0,0 +1,9 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#pragma once
+#include <types.h>
+
+void IOTimerInitialize(UInt32 freq);
+UInt64 IOTimerInterruptsHandler(CPURegisters *regs);
+UInt64 IOTimerGetTicks();

kernel/inc/KSH/KSHBuiltins.h

@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#pragma once
+
+void KSHCommandKernelFetch();
+void KSHCommandMeow();
+void KSHCommandHelp();
+void KSHCommandRegisters();
+void KSHCommandSleep();
+void KSHCommandDebug();
+void KSHCommandRand();
+void KSHCommandVer();

kernel/inc/KSH/KSHDebug.h

@@ -2,8 +2,6 @@
 // Copyright (c) 2026 0xKarinyash
 
 #pragma once
-
 #include <types.h>
 
-bool exec_init(const char* path);
-void init_task_entry();
+UInt64 KSHDebug();

kernel/inc/KSH/KSHEntry.h

@@ -3,4 +3,4 @@
 
 #pragma once
 
-void jump_to_userspace(void* entry, void* user_stack_top);
+void KSHEntry();

kernel/inc/OS/Exec/HOTLoader.h

@@ -0,0 +1,8 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#pragma once
+#include <types.h>
+#include <OS/OSScheduler.h>
+
+UInt64 HOTLoad(OSProcess* process, UInt8* data);

kernel/inc/OS/Exec/OSLoader.h

@@ -0,0 +1,9 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#pragma once
+
+#include <types.h>
+
+Int32 OSLoaderProcessSpawn(const char* executablePath, const char* processName);
+void init_task_entry();

kernel/inc/OS/OSPanic.h

@@ -0,0 +1,8 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#pragma once
+#include <types.h>
+
+__attribute__((noreturn)) void OSPanicException(CPURegisters* frame);
+__attribute__((noreturn)) void OSPanic(const char* msg);

kernel/inc/OS/OSScheduler.h

@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#pragma once
+#include <types.h>
+
+typedef enum OSProcessState {
+    kOSProcessStateDead,
+    kOSProcessStateRunning,
+    kOSProcessStateReady,
+    kOSProcessStateBlocked,
+    kOSProcessStateSleeping,
+} OSProcessState;
+
+typedef struct OSProcess {
+    UInt64 processId;
+    OSProcessState state;
+    UInt64 physicalPML4;
+    struct OSProcess* parent;
+    char name[32];
+    UInt64 heapStartPointer;
+    UInt64 heapCurrentPointer;
+} OSProcess;
+
+typedef struct OSTask {
+    UInt64 stackPointer;
+    struct OSTask* next;
+    UInt32 id;
+    UInt32 sleepTicks;
+    OSProcessState taskState; // reusing process_state cuz wn
+    UInt64 kernelStackTop;
+    void* kernelStackBase;
+    OSProcess* process;
+    Int32 waitingForProcess;
+} OSTask;
+
+void OSSchedulerInitialize();
+OSTask* OSSchedulerSpawn(void(*entry)(), OSProcess* owner, Boolean isUser, UInt64 fixedUserStackPointer);
+UInt64 OSSchedulerNext(UInt64 currentStackPointer);
+void OSSchedulerYield(UInt64 ticks);
+void OSSchedulerBlock(UInt32 processID);
+void OSSchedulerWakeup(UInt32 processID);
+void OSSchedulerTerminate(); // suicide
+
+extern OSTask* gOSSchedulerCurrentTask;

kernel/inc/OS/OSSpinlock.h

@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#pragma once
+
+#include <types.h>
+
+typedef struct OSSpinlock {
+    volatile UInt32 lockValue;
+} OSSpinlock;
+
+typedef struct OSSpinlockState {
+    Boolean interruptsEnabled;
+} OSSpinlockState;
+
+void OSSpinlockLock(OSSpinlock* lock);
+void OSSpinlockUnlock(OSSpinlock* lock);
+void OSSpinlockLockIRQ(OSSpinlock* lock, OSSpinlockState* state);
+void OSSpinlockUnlockIRQ(OSSpinlock *lock, OSSpinlockState* state);

kernel/inc/OS/Services/OSServiceIO.h

@@ -0,0 +1,8 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#pragma once
+#include <types.h>
+
+UInt64 OSServiceIOWrite(UInt64 fileDescriptor, UInt64 buffer, UInt64 length);
+UInt64 OSServiceIORead(UInt64 fileDescriptor, UInt64 buffer, UInt64 count);

kernel/inc/OS/Services/OSServiceMemory.h

@@ -1,8 +1,7 @@
 // SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2025 0xKarinyash
+// Copyright (c) 2026 0xKarinyash
 
 #pragma once
 #include <types.h>
 
-void rng_init();
-u64 krand();
+UInt64 OSServiceMemoryAllocate(UInt64 size);

kernel/inc/OS/Services/OSServiceProcess.h

@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#pragma once
+
+#include <types.h>
+
+Int32 OSServiceProcessExit(Int32 code);
+Int32 OSServiceProcessSpawn(const char* path);
+Int32 OSServiceProcessWait(UInt64 pid);

kernel/inc/VM/Heap.h

@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#pragma once
+#include <types.h>
+
+enum {
+    kVMKernelHeapStart = 0xFFFFFFFFC0000000,
+    kVMHeapSizePages = 1024,
+    kVMHeapBlockHeaderMagic = 0x1CE
+};
+
+#define PHYS_TO_HEAP(phys) ((phys) + KERNEL_HEAP_START)
+#define HEAP_TO_PHYS(phys) ((phys) - KERNEL_HEAP_START)
+typedef struct VMHeapBlockHeader {
+    UInt64 magic;
+    struct VMHeapBlockHeader* next;
+    struct VMHeapBlockHeader* previous;
+    UInt64 size;
+    bool isFree;
+} VMHeapBlockHeader;
+
+void VMHeapInitialize();
+void* VMHeapAllocate(UInt64 size);
+void VMHeapFree(void* ptr);
+void* VMHeapResize(void* ptr, UInt64 newSize);

kernel/inc/VM/PMM.h

@@ -0,0 +1,49 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#pragma once
+#include "bootinfo.h"
+#include <types.h>
+
+#define kVMPageSize 4096
+#define kVMSafeSpaceStartAddress 0x100000
+#define kVMBlocksPerByte 8
+
+#define BITMAP_BYTE_INDEX(address)  ((address / kVMPageSize) / kVMBlocksPerByte)
+#define BITMAP_BIT_OFFSET(address)  ((address / kVMPageSize) % kVMBlocksPerByte)
+#define BITMAP_TEST(bitmap, address)  (bitmap[BITMAP_BYTE_INDEX(address)] & (1 << BITMAP_BIT_OFFSET(address)))
+#define BITMAP_SET(bitmap, address)   (bitmap[BITMAP_BYTE_INDEX(address)] |= (1 << BITMAP_BIT_OFFSET(address)))
+#define BITMAP_UNSET(bitmap, address) (bitmap[BITMAP_BYTE_INDEX(address)] &= ~(1 << BITMAP_BIT_OFFSET(address)))
+
+typedef struct {
+    UInt32 type;
+    UInt32 padding;
+    UInt64 physicalStart;
+    UInt64 virtualStart;
+    UInt64 pageCount;
+    UInt64 attributes;
+} __attribute__((packed)) OSMemoryDescriptor;
+
+typedef enum {
+    kOSMemoryTypeReserved,
+    kOSMemoryTypeLoaderCode,
+    kOSMemoryTypeLoaderData,
+    kOSMemoryTypeBootServicesCode,
+    kOSMemoryTypeBootServicesData,
+    kOSMemoryTypeRuntimeServicesCode,
+    kOSMemoryTypeRuntimeServicesData,
+    kOSMemoryTypeConventional,
+    kOSMemoryTypeUnusable,
+    kOSMemoryTypeACPIReclaim,
+    kOSMemoryTypeACPINonVolatile,
+    kOSMemoryTypeMappedIO,
+    kOSMemoryTypeMappedIOPortSpace,
+    kOSMemoryTypePalCode,
+    kOSMemoryTypePersistent,
+    kOSMemoryTypeMax
+} OSMemoryType;
+
+UInt64 VMPhysicalMemoryGetTotalMemorySize();
+void  VMPhysicalMemoryInitialize(BIMemoryMap* mmap);
+void* VMPhysicalMemoryAllocatePage();
+void  VMPhysicalMemoryFreePage(void* addr);

kernel/inc/VM/VMM.h

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2025 0xKarinyash
+// Copyright (c) 2026 0xKarinyash
 
 #pragma once
 #include "bootinfo.h"
@@ -35,5 +35,9 @@
 #define HHDM_TO_PHYS(virt)  ((virt) - HHDM_OFFSET)
 
 
-void vmm_init(Bootinfo* info);
-u64* vmm_map_page(u64* pml4, u64 phys, u64 virt, u64 flags);
+void VMVirtualMemoryInitialize(Bootinfo* info);
+UInt64* VMVirtualMemoryMapPage(UInt64* PML4, UInt64 physical, UInt64 virtual, UInt64 flags);
+UInt64 VMVirtualMemoryCreateAddressSpace();
+UInt64 VMGetCurrentCR3();
+void VMLoadCR3(UInt64 PML4Address);
+void VMVirtualMemorySetupUserStack(UInt64* physicalPML4);

kernel/inc/arch/x86_64/GDT.h

@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#pragma once
+#include <types.h>
+
+#define kHALGDTEntries 7
+
+typedef struct {
+    UInt16 limitLow;  
+    UInt16 baseLow;     
+    UInt8  baseMiddle;  
+    UInt8  access; 
+    UInt8  granularity;  
+    UInt8  baseHigh;
+} __attribute__((packed)) HALGlobalDescriptorTable;
+
+
+typedef struct {
+    UInt16 limit; 
+    UInt64 base; 
+} __attribute__((packed)) HALGlobalDescriptorTablePointer;
+
+typedef struct {
+    UInt32 reserved0;
+    UInt64 rsp0;
+    UInt64 rsp1;
+    UInt64 rsp2;
+    UInt64 reserved1;
+    UInt64 ist1;
+    UInt64 ist2;
+    UInt64 ist3;
+    UInt64 ist4;
+    UInt64 ist5;
+    UInt64 ist6;
+    UInt64 ist7;
+    UInt64 reserved2;
+    UInt16 reserved3;
+    UInt16 iomapBase;
+} __attribute__((packed)) HALTaskStateSegment;
+
+
+extern HALTaskStateSegment gHALTaskStateSegment;
+
+void HALGlobalDescriptorTableInitialize();

kernel/inc/arch/x86_64/IDT.h

@@ -0,0 +1,22 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#pragma once
+#include <types.h>
+
+typedef struct {
+    UInt16 offsetLow;
+    UInt16 selector;
+    UInt8  ist;   
+    UInt8  attributes; 
+    UInt16 offsetMid; 
+    UInt32 offsetHigh; 
+    UInt32 reserved;  
+} __attribute__((packed)) HALInterruptsDescriptorTableEntry;
+
+typedef struct {
+    UInt16 limit;
+    UInt64 base;
+} __attribute__((packed)) HALInterruptsDescriptorTablePointer;
+
+void HALInterruptsDescriptorTableInitialize();

kernel/inc/arch/x86_64/IO.h

@@ -0,0 +1,44 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#pragma once
+
+#include <types.h>
+
+enum {
+    kIOMasterCommand = 0x20,
+    kIOMasterData    = 0x21,
+    kIOSlaveCommand  = 0xA0,
+    kIOSlaveData     = 0xA1,
+    kIOPortWaitAddress = 0x80
+};
+
+static inline void IOPortWrite8(UInt16 port, UInt8 val) {
+    __asm__ volatile( 
+        "outb %0, %1" 
+        : 
+        : "a"(val), 
+        "Nd"(port) );
+}
+
+static inline unsigned char IOPortRead8(UInt16 port) {
+    unsigned char ret;
+    __asm__ volatile(
+        "inb %1, %0"
+        : "=a"(ret)
+        : "Nd"(port)
+    );
+
+    return ret;
+}
+
+// sending junk to 0x80 (unused) to skip few tacts
+// not ideal i know
+static inline void IOSynchronizeBus() {
+    IOPortWrite8(kIOPortWaitAddress, 0x0);
+}
+
+static inline void IOPortWrite8WithWait(UInt16 port, UInt8 val) {
+    IOPortWrite8(port, val);
+    IOSynchronizeBus();
+}

kernel/inc/arch/x86_64/OSCPU.h

@@ -0,0 +1,42 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+#pragma once
+#include <types.h>
+
+typedef enum {
+    kCPUFeatureFPU        = (1ULL << 0),
+    kCPUFeatureTSC        = (1ULL << 1),
+    kCPUFeatureMSR        = (1ULL << 2),
+    kCPUFeatureAPIC       = (1ULL << 3),
+    kCPUFeatureMTRR       = (1ULL << 4),
+    kCPUFeaturePAE        = (1ULL << 5),
+    
+    kCPUFeatureSSE        = (1ULL << 10),
+    kCPUFeatureSSE2       = (1ULL << 11),
+    kCPUFeatureSSE3       = (1ULL << 12),
+    kCPUFeatureSSSE3      = (1ULL << 13),
+    kCPUFeatureSSE4_1     = (1ULL << 14),
+    kCPUFeatureSSE4_2     = (1ULL << 15),
+    
+    kCPUFeatureAVX        = (1ULL << 20),
+    kCPUFeatureF16C       = (1ULL << 21),
+    kCPUFeatureRDRAND     = (1ULL << 22),
+    
+    kCPUFeatureHypervisor = (1ULL << 30)
+} OSCPUFeature;
+
+typedef struct {
+    UInt64 userStackPointer;
+    UInt64 kernelStackPointer;
+    UInt64 selfAddress;
+
+    UInt64 features;
+    char vendorID[13];
+    UInt32 family;
+    UInt32 model;
+} OSCPUData;
+
+extern OSCPUData gOSBootCPU;
+
+void OSCPUInitialize(UInt64 kernelStackTop);
+Boolean OSCPUHasFeature(OSCPUFeature feature);

kernel/inc/arch/x86_64/PIC.h

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2025 0xKarinyash
+// Copyright (c) 2026 0xKarinyash
 #pragma once
 #include <types.h>
 
-u16 pic_remap();
+UInt16 HALLegacyInterruptControllerRemap();

kernel/inc/arch/x86_64/cpuinfo.h

@@ -1,40 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2026 0xKarinyash
-#pragma once
-#include <types.h>
-
-#define CPU_FEAT_FPU      (1ULL << 0)
-#define CPU_FEAT_TSC      (1ULL << 1)
-#define CPU_FEAT_MSR      (1ULL << 2)
-#define CPU_FEAT_APIC     (1ULL << 3)
-#define CPU_FEAT_MTRR     (1ULL << 4)
-#define CPU_FEAT_PAE      (1ULL << 5)
-
-#define CPU_FEAT_SSE      (1ULL << 10)
-#define CPU_FEAT_SSE2     (1ULL << 11)
-#define CPU_FEAT_SSE3     (1ULL << 12)
-#define CPU_FEAT_SSSE3    (1ULL << 13)
-#define CPU_FEAT_SSE4_1   (1ULL << 14)
-#define CPU_FEAT_SSE4_2   (1ULL << 15)
-
-#define CPU_FEAT_AVX      (1ULL << 20)
-#define CPU_FEAT_F16C     (1ULL << 21)
-#define CPU_FEAT_RDRAND   (1ULL << 22)
-
-#define CPU_FEAT_HYPERVISOR (1ULL << 30) 
-
-typedef struct {
-    u64 user_rsp;
-    u64 kernel_rsp;
-    u64 self;
-
-    u64 features;
-    char vendor[13];
-    u32 family;
-    u32 model;
-} cpu_info;
-
-extern cpu_info g_cpu;
-
-void cpuinfo_init(u64 kernel_stack_top);
-bool cpu_has(u64 feature);

kernel/inc/arch/x86_64/gdt.h

@@ -1,42 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2025 0xKarinyash
-
-#pragma once
-#include <types.h>
-
-typedef struct {
-    u16 limit_low;  
-    u16 base_low;     
-    u8  base_middle;  
-    u8  access; 
-    u8  granularity;  
-    u8  base_high;
-} __attribute__((packed)) GDTDescriptor;
-
-
-typedef struct {
-    u16 limit; 
-    u64 base; 
-} __attribute__((packed)) GDTPtr;
-
-typedef struct {
-    u32 reserved0;
-    u64 rsp0;
-    u64 rsp1;
-    u64 rsp2;
-    u64 reserved1;
-    u64 ist1;
-    u64 ist2;
-    u64 ist3;
-    u64 ist4;
-    u64 ist5;
-    u64 ist6;
-    u64 ist7;
-    u64 reserved2;
-    u16 reserved3;
-    u16 iomap_base;
-} __attribute__((packed)) TSS;
-
-extern TSS tss;
-
-void gdt_init();

kernel/inc/arch/x86_64/idt.h

@@ -1,22 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2025 0xKarinyash
-
-#pragma once
-#include <types.h>
-
-typedef struct {
-    u16 offset_low;
-    u16 selector;
-    u8  ist;   
-    u8  attributes; 
-    u16 offset_mid; 
-    u32 offset_high; 
-    u32 reserved;  
-} __attribute__((packed)) IDTEntry;
-
-typedef struct {
-    u16 limit;
-    u64 base;
-} __attribute__((packed)) IDTPtr;
-
-void idt_init();

kernel/inc/arch/x86_64/io.h

@@ -1,39 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2025 0xKarinyash
-
-#pragma once
-
-#define MASTER_COMMAND 0x20
-#define MASTER_DATA    0x21
-#define SLAVE_COMMAND  0xA0
-#define SLAVE_DATA     0xA1
-
-static inline void outb(unsigned short port, unsigned char val) {
-    __asm__ volatile( 
-        "outb %0, %1" 
-        : 
-        : "a"(val), 
-        "Nd"(port) );
-}
-
-static inline unsigned char inb(unsigned short port) {
-    unsigned char ret;
-    __asm__ volatile(
-        "inb %1, %0"
-        : "=a"(ret)
-        : "Nd"(port)
-    );
-
-    return ret;
-}
-
-// sending junk to 0x80 (unused) to skip few tacts
-// not ideal i know
-static inline void io_wait() {
-    outb(0x80, 0x0);
-}
-
-static inline void outb_wait(unsigned short port, unsigned char val) {
-    outb(port, val);
-    io_wait();
-}

kernel/inc/arch/x86_64/syscall.h

@@ -3,18 +3,26 @@
 
 #pragma once
 
-#define MSR_EFER         0xC0000080
-#define MSR_STAR         0xC0000081
-#define MSR_LSTAR        0xC0000082
-#define MSR_FMASK        0xC0000084
-#define MSR_KERNEL_GS_BASE 0xC0000102
+enum {
+    kHALModelSpecificRegisterExtendedFeatureEnable = 0xC0000080, // EFER
+    kHALModelSpecificRegisterSystemCallTarget      = 0xC0000081, // STAR
+    kHALModelSpecificRegisterLongSystemCallTarget  = 0xC0000082, // LSTAR
+    kHALModelSpecificRegisterSystemCallFlagMask    = 0xC0000084, // FMASK
+    kHALModelSpecificRegisterGSBase                = 0xC0000101, // GS_BASE
+    kHALModelSpecificRegisterKernelGSBase          = 0xC0000102  // KERNEL_GS_BASE
+};
 
-#define EFER_SCE         0x01 // System Call Enable
+enum {
+    kHALEFERSystemCallExtensionsEnable = 0x01 // SCE
+};
 
 typedef enum {
     SYS_EXIT,
-    SYS_EXEC,
+    SYS_SPAWN,
+    SYS_MEM,
     SYS_WRITE,
-} syscalls;
+    SYS_READ,
+    SYS_WAIT,
+} Services;
 
-void syscall_init();
+void OSServicesInitialize();

kernel/inc/core/panic.h

@@ -1,10 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2025 0xKarinyash
-
-#pragma once
-#include <types.h>
-
-__attribute__((noreturn)) void panic_exception(Registers *regs);
-__attribute__((noreturn)) void panic(const char* msg);
-
-extern const char* exception_messages[];

kernel/inc/core/scheduler.h

@@ -1,17 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2025 0xKarinyash
-
-#pragma once
-#include <types.h>
-typedef struct task {
-    u64 rsp;
-    struct task* next;
-    u32 id;
-    u32 sleep_ticks;
-    u64 kernel_stack_top;
-} task;
-
-void sched_init();
-task* sched_spawn(void(*entry)());
-u64 sched_next(u64 curr_rsp);
-void yield(u64 ticks);

kernel/inc/core/splash.h

@@ -1,8 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2025 0xKarinyash
-
-#pragma once
-#include <drivers/shitgui.h>
-
-void show_splash(SG_Context *sg_ctx);
-

kernel/inc/core/string.h

@@ -1,10 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2025 0xKarinyash
-
-#pragma once
-#include <types.h>
-
-i32 strcmp(const char* s1, const char* s2);
-i32 strncmp(const char* s1, const char* s2, u64 n);
-char* strcpy(char* dest, const char* src);
-char* strncpy(char* dest, const char* src, u64 n);

kernel/inc/drivers/console.h

@@ -1,21 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2025 0xKarinyash
-
-#pragma once
-#include <drivers/shitgui.h>
-
-void console_init(SG_Context *ctx);
-u64 console_get_colors();
-void console_clear(u32 color);
-SG_Context* console_get_context();
-SG_Point console_get_dimensions();
-void console_set_color(u32 color);
-void console_set_default_color(u32 color);
-void console_set_cursor_pos(SG_Point *p);
-char console_getc();
-void kprint(const char *str);
-void kprintf(const char *fmt, ...);
-void kgets(char* buff, u32 lim);
-void cursor_blink();
-void cursor_blinker_sched_task();
-void console_toggle_cursor_blink();

kernel/inc/drivers/font.h

@@ -1,4 +0,0 @@
-#pragma once
-#include <types.h>
-
-extern u8 font8x16[128][16];

kernel/inc/drivers/keyboard.h

@@ -1,16 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2025 0xKarinyash
-
-#pragma once
-#include <types.h>
-
-#define KB_BUFF_SIZE 256
-typedef struct { 
-    char buffer[KB_BUFF_SIZE];
-    u16 head;
-    u16 tail;
-} kb_buffer;
-
-extern kb_buffer kb_buf;
-
-void kb_handler();

kernel/inc/drivers/serial.h

@@ -1,8 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2025 0xKarinyash
-
-#pragma once
-
-int serial_init();
-void serial_writec(char chr);
-void serial_write(const char *str);

kernel/inc/drivers/shitgui.h

@@ -1,33 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2025 0xKarinyash
-
-#pragma once
-#include <types.h>
-
-typedef struct {
-    volatile u32 *fb;
-    u32 width;
-    u32 height;
-    u32 pitch;
-} SG_Context;
-typedef struct { 
-    u32 x;
-    u32 y;
-} SG_Point;
-typedef struct {
-    u32 *buffer;
-    u32 height;
-    u32 width;
-} SG_Image;
-
-typedef struct {
-    u32 w;
-    u32 h;
-    const unsigned char* base;
-} SG_Font;
-
-void sg_init(SG_Context *ctx);
-u32 sg_get_pixel(SG_Context *ctx, SG_Point *p);
-void sg_put_img(SG_Context *ctx, SG_Point *p, SG_Image *img);
-void sg_draw_rect(SG_Context *ctx, SG_Point *p, u32 w, u32 h, u32 color);
-void sg_draw_char_bitmap(SG_Context *ctx, SG_Point *p, char c, u32 color, SG_Font *font);

kernel/inc/drivers/timer.h

@@ -1,10 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2025 0xKarinyash
-
-#pragma once
-#include <types.h>
-
-void timer_init(u32 freq);
-u64 timer_handler(Registers *regs);
-void sleep(u64 ms);
-u64 get_uptime();

kernel/inc/fs/cpio.h

@@ -1,8 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2026 0xKarinyash
-#pragma once
-#include <types.h>
-#include <fs/vfs.h>
-
-u64 cpio_read(fs_node* node, u64 offset, u64 size, u8* buff);
-fs_node* cpio_mount(void* base, u64 size);

kernel/inc/fs/vfs.h

@@ -1,38 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2026 0xKarinyash
-#pragma once
-#include <types.h>
-
-#define FS_FILE 0x01
-#define FS_DIR 0x02
-
-struct fs_node;
-typedef struct fs_node fs_node;
-
-typedef struct {
-    u64 (*read)(struct fs_node* node, u64 offset, u64 size, u8* buff);
-    u64 (*write)(struct fs_node* node, u64 offset, u64 size, u8* buff);
-    void (*open)(struct fs_node* node);
-    void (*close)(struct fs_node* node);
-
-    struct fs_node* (*finddir)(struct fs_node* node, char* name);
-} fs_ops;
-
-struct fs_node {
-    char name[256];
-    u32 mask;
-    u32 uid;
-    u32 gid;
-    u32 flags;
-    u32 inode;
-    u64 len;
-    fs_ops* ops;
-    void* impl_data;
-    struct fs_node* ptr;
-    struct fs_node* next;
-};
-
-void vfs_init(fs_node* root_node);
-u64 vfs_read(fs_node* node, u64 offset, u64 size, u8* buff);
-fs_node* vfs_open(const char* path);
-void vfs_close(fs_node* node);

kernel/inc/lib/Math.h

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2025 0xKarinyash
+// Copyright (c) 2026 0xKarinyash
 #pragma once
 #include <types.h>
 
@@ -13,7 +13,7 @@ static inline int abs(int n) {
     return (n < 0) ? -n : n;
 }
 
-static inline i64 i64abs(i64 n) {
+static inline Int64 i64abs(Int64 n) {
     return (n < 0) ? -n : n;
 }
 

kernel/inc/lib/Rand.h

@@ -1,7 +1,8 @@
 // SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2025 0xKarinyash
+// Copyright (c) 2026 0xKarinyash
 
 #pragma once
 #include <types.h>
 
-u64 debug();
+void RandInitialize();
+UInt64 Rand();

kernel/inc/lib/Splash.h

@@ -0,0 +1,8 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#pragma once
+#include <IO/IOGraphics.h>
+
+void SplashShow(IOGraphicsContext* IOGraphicsContextPointer);
+

kernel/inc/lib/String.h

@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#pragma once
+#include <types.h>
+
+void* MemorySet(void* destination, UInt8 value, UInt64 count);
+void* MemoryCopy(void* destination, const void* source, UInt64 count);
+Int32 StringCompare(const char* firstString, const char* secondString);
+Int32 StringCompareWithLimit(const char* firstString, const char* secondString, UInt64 limit);
+char* StringCopy(char* destination, const char* source);
+char* StringCopyWithLimit(char* destination, const char* source, UInt64 limit);
+UInt64 StringGetLength(const char* string);

kernel/inc/mm/heap.h

@@ -1,24 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2025 0xKarinyash
-
-#pragma once
-#include <types.h>
-
-#define KERNEL_HEAP_START   0xFFFFFFFFC0000000
-#define PHYS_TO_HEAP(phys) ((phys) + KERNEL_HEAP_START)
-#define HEAP_TO_PHYS(phys) ((phys) - KERNEL_HEAP_START)
-
-#define HEADER_MAGIC 0x1CE
-
-typedef struct block_header {
-    u64 magic;
-    struct block_header* next;
-    struct block_header* prev;
-    u64 size;
-    bool is_free;
-} block_header;
-
-void heap_init();
-void* malloc(u64 size);
-void free(void* ptr);
-void* realloc(void* ptr, u64 new_size);

kernel/inc/mm/memory.h

@@ -1,8 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2025 0xKarinyash
-
-#pragma once
-#include <types.h>
-
-void* memset(void* ptr, int value, usize num);
-void* memcpy(void* dest, const void* src, u64 n);

kernel/inc/mm/pmm.h

@@ -1,22 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2025 0xKarinyash
-
-#pragma once
-#include "bootinfo.h"
-#include <types.h>
-
-#define PAGE_SIZE 4096
-#define BLOCKS_PER_BYTE 8
-
-#define SAFE_SPACE_START_ADDR 0x100000
-
-#define BITMAP_BYTE_INDEX(addr)  ((addr / PAGE_SIZE) / BLOCKS_PER_BYTE)
-#define BITMAP_BIT_OFFSET(addr)  ((addr / PAGE_SIZE) % BLOCKS_PER_BYTE)
-#define BITMAP_TEST(bitmap, addr)  (bitmap[BITMAP_BYTE_INDEX(addr)] & (1 << BITMAP_BIT_OFFSET(addr)))
-#define BITMAP_SET(bitmap, addr)   (bitmap[BITMAP_BYTE_INDEX(addr)] |= (1 << BITMAP_BIT_OFFSET(addr)))
-#define BITMAP_UNSET(bitmap, addr) (bitmap[BITMAP_BYTE_INDEX(addr)] &= ~(1 << BITMAP_BIT_OFFSET(addr)))
-
-u64   pmm_get_total_mem();
-void  pmm_init(BI_MemoryMap* mmap);
-void* pmm_alloc_page();
-void  pmm_free_page(void* addr);

kernel/inc/shell/builtins.h

@@ -1,14 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2025 0xKarinyash
-
-#pragma once
-
-void cmd_kfetch();
-void cmd_meow();
-void cmd_help();
-void cmd_regs();
-void print_regs();
-void cmd_sleep();
-void cmd_debug();
-void cmd_rand();
-void cmd_ver();

kernel/inc/shell/ksh.h

@@ -1,7 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2025 0xKarinyash
-
-#pragma once
-#include <drivers/shitgui.h>
-
-void ksh();

kernel/inc/types.h

@@ -1,57 +1,26 @@
 // SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2025 0xKarinyash
+// Copyright (c) 2026 0xKarinyash
 
 #pragma once
 
-typedef unsigned char      u8;
-typedef unsigned short     u16;
-typedef unsigned int       u32;
-typedef unsigned long long u64; 
+typedef unsigned char      UInt8;
+typedef unsigned short     UInt16;
+typedef unsigned int       UInt32;
+typedef unsigned long long UInt64; 
 
-typedef signed char        i8;
-typedef signed short       i16;
-typedef signed int         i32;
-typedef signed long long   i64;
+typedef signed char        Int8;
+typedef signed short       Int16;
+typedef signed int         Int32;
+typedef signed long long   Int64;
 
-typedef u64 usize;
-typedef u64 uintptr_t;
+typedef UInt64 Size;
+typedef UInt64 uintptr_t;
 
 typedef struct {
-    u64 rax, rbx, rcx, rdx, rbp, rsi, rdi, r8, r9, r10, r11, r12, r13, r14, r15; // Pushed by us
-    u64 int_no, err_code;                                                       // Pushed by macro
-    u64 rip, cs, rflags, rsp, ss;                                               // Pushed by CPU
-} Registers;
+    UInt64 rax, rbx, rcx, rdx, rbp, rsi, rdi, r8, r9, r10, r11, r12, r13, r14, r15; // Pushed by us
+    UInt64 interruptNumber, errorCode;                                                       // Pushed by macro
+    UInt64 rip, cs, rflags, rsp, ss;                                               // Pushed by CPU
+} CPURegisters;
 
-typedef struct {
-    u32 type;
-    u32 pad;
-    u64 physical_start;
-    u64 virtual_start;
-    u64 number_of_pages;
-    u64 attribute;
-} __attribute__((packed)) efi_memory_descriptor_k;
 
-typedef enum {
-    EfiReservedMemoryType,
-    EfiLoaderCode,
-    EfiLoaderData, 
-    EfiBootServicesCode,
-    EfiBootServicesData,
-    EfiRuntimeServicesCode,
-    EfiRuntimeServicesData,
-    EfiConventionalMemory,
-    EfiUnusableMemory,
-    EfiACPIReclaimMemory,
-    EfiACPIMemoryNVS,
-    EfiMemoryMappedIO,
-    EfiMemoryMappedIOPortSpace,
-    EfiPalCode,
-    EfiPersistentMemory,
-    EfiMaxMemoryType
-} EFI_MEMORY_TYPE;
-
-#ifndef __cplusplus
-    #define bool _Bool
-    #define true 1
-    #define false 0
-#endif
+#define Boolean _Bool

kernel/linker.ld

@@ -1,5 +1,5 @@
 /* SPDX-License-Identifier: GPL-3.0-or-later
-   Copyright (c) 2025 0xKarinyash */
+   Copyright (c) 2026 0xKarinyash */
 
 ENTRY(_start)
 

kernel/src/FS/CPIO.c

@@ -0,0 +1,122 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#include <types.h>
+#include <FS/CPIO.h>
+#include <FS/VFS.h>
+#include <lib/String.h>
+#include <OS/OSPanic.h>
+#include <VM/Heap.h>
+#include <IO/IOConsole.h>
+
+#define FSCPIO_ALIGN4(x) (((x) + 3) & ~3)
+
+typedef struct FSCPIOHeader {
+    char magic[6];
+    char inode[8];
+    char mode[8];
+    char userIdentifier[8];
+    char groupIdentifier[8];
+    char linkCount[8];
+    char modificationTime[8];
+    char fileLength[8];
+    char deviceMajor[8];
+    char deviceMinor[8];
+    char remoteDeviceMajor[8];
+    char remoteDeviceMinor[8];
+    char nameLength[8];
+    char checkSum[8];
+} FSCPIOHeader;
+
+static FSVNodeOperations gFSCPIOOperations = {
+    .read = FSCPIORead,
+    .write = nullptr,
+    .open = nullptr,
+    .close = nullptr,
+};
+
+static UInt64 sFSCPIOHexadecimalToUInt64(const char* string, Int32 length) {
+    UInt64 result = 0;
+    for (Int32 i = 0; i < length; i++) {
+        char character = string[i];
+        result <<= 4;
+        if (character >= '0' && character <= '9') result += (character - '0');
+        else if (character >= 'A' && character <= 'F') result += (character - 'A' + 10);
+        else if (character >= 'a' && character <= 'f') result += (character - 'a' + 10);
+    }
+    return result;
+}
+
+UInt64 FSCPIORead(FSVNode* node, UInt64 offset, UInt64 size, UInt8* buffer) {
+    if (offset > node->dataLength) return 0;
+    if ((offset + size) > node->dataLength) size = node->dataLength - offset;
+
+    MemoryCopy(buffer, (char*)node->implementationData + offset, size);
+    return size;
+}
+
+FSVNode* FSCPIOMount(void* baseAddress, UInt64 totalSize) {
+    UInt8* currentPointer = (UInt8*)baseAddress;
+    UInt8* endPointer = currentPointer + totalSize;
+
+    FSVNode* rootNode = (FSVNode*)VMHeapAllocate(sizeof(FSVNode));
+    if (!rootNode) OSPanic("CPIO: Failed to allocate memory for root node");
+    
+    MemorySet(rootNode, 0, sizeof(FSVNode));
+    StringCopy(rootNode->name, "/");
+    rootNode->flags = kFSVNodeFlagDirectory;
+    rootNode->operations = &gFSCPIOOperations;
+
+    FSVNode* tailNode = nullptr;
+
+    while (currentPointer < endPointer) {
+        FSCPIOHeader* header = (FSCPIOHeader*)currentPointer;
+
+        if (StringCompareWithLimit(header->magic, "070701", 6) != 0) {
+            OSPanic("CPIO: Invalid magic detected in StartupVolume");
+        }
+
+        UInt64 nameSize = sFSCPIOHexadecimalToUInt64(header->nameLength, 8);
+        UInt64 fileSize = sFSCPIOHexadecimalToUInt64(header->fileLength, 8);
+
+        char* fileName = (char*)(currentPointer + sizeof(FSCPIOHeader));
+        if (StringCompare(fileName, "TRAILER!!!") == 0) break;
+
+        UInt64 headerAndNameLength = sizeof(FSCPIOHeader) + nameSize;
+        UInt64 offsetToData = FSCPIO_ALIGN4(headerAndNameLength);
+        void* fileContent = (void*)(currentPointer + offsetToData);
+
+        FSVNode* newNode = (FSVNode*)VMHeapAllocate(sizeof(FSVNode));
+        if (!newNode) OSPanic("CPIO: Failed to allocate memory for new node");
+        
+        MemorySet(newNode, 0, sizeof(FSVNode));
+        StringCopyWithLimit(newNode->name, fileName, sizeof(newNode->name) - 1);
+
+        newNode->dataLength = fileSize;
+        newNode->inodeIdentifier = sFSCPIOHexadecimalToUInt64(header->inode, 8);
+        newNode->operations = &gFSCPIOOperations;
+        newNode->implementationData = fileContent;
+
+        UInt64 mode = sFSCPIOHexadecimalToUInt64(header->mode, 8);
+        if ((mode & 0xF000) == 0x4000) {
+            newNode->flags = kFSVNodeFlagDirectory;
+        } else {
+            newNode->flags = kFSVNodeFlagFile;
+        }
+
+        if (rootNode->childNode == nullptr) {
+            rootNode->childNode = newNode;
+        } else if (tailNode) {
+            tailNode->nextNode = newNode;
+        }
+
+        tailNode = newNode;
+
+        IOConsoleLog("^bCPIO^!: Found object '^y%s^!' (size: ^y%d^!) at ^y0x%x^!\n", fileName, fileSize, fileContent);
+
+        UInt64 dataLengthAligned = FSCPIO_ALIGN4(fileSize);
+        currentPointer += offsetToData + dataLengthAligned;
+    }
+
+    return rootNode;
+}

kernel/src/FS/VFS.c

@@ -0,0 +1,53 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#include <FS/VFS.h>
+#include <lib/String.h>
+
+FSVNode* gFSVirtualFileSystemRoot = nullptr;
+
+void FSVirtualFileSystemInitialize(FSVNode* rootNode) {
+    gFSVirtualFileSystemRoot = rootNode;
+}
+
+UInt64 FSVNodeRead(FSVNode* node, UInt64 offset, UInt64 size, UInt8* buffer) {
+    if (!node || !node->operations || !node->operations->read) {
+        return 0;
+    }
+
+    return node->operations->read(node, offset, size, buffer);
+}
+
+FSVNode* FSVirtualFileSystemOpenPath(const char* path) {
+    if (!gFSVirtualFileSystemRoot) {
+        return nullptr;
+    }
+
+    if (StringCompare(path, "/") == 0) {
+        return gFSVirtualFileSystemRoot;
+    }
+    
+    const char* searchName = path;
+    if (path[0] == '/') {
+        searchName++;
+    }
+
+    FSVNode* nodeIterator = gFSVirtualFileSystemRoot->childNode;
+    while (nodeIterator != nullptr) {
+        if (StringCompare(nodeIterator->name, searchName) == 0) {
+            if (nodeIterator->operations && nodeIterator->operations->open) {
+                nodeIterator->operations->open(nodeIterator);
+            }
+            return nodeIterator;
+        } 
+        nodeIterator = nodeIterator->nextNode;
+    }
+
+    return nullptr;
+}
+
+void FSVNodeClose(FSVNode* node) {
+    if (node && node->operations && node->operations->close) {
+        node->operations->close(node);
+    }
+}

kernel/src/IO/IOConsole.c

@@ -0,0 +1,267 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#include <IO/IOConsole.h>
+#include <IO/IOSerial.h>
+#include <IO/IOGraphics.h>
+#include <IO/IOKeyboard.h>
+
+#include <lib/Math.h>
+#include <OS/OSScheduler.h>
+
+#include <types.h>
+
+#include <stdarg.h>
+
+#include <Data/VGAFont.h>
+
+static IOGraphicsContext* sIOGraphicsContextPointer = nullptr;
+static IOGraphicsPoint sIOConsoleCursorPosition = {0};
+static IOGraphicsFont sIOConsoleFont = {0};
+static IOGraphicsColor sIOConsoleForegroundColor = kIOConsoleColorWhite;
+static IOGraphicsColor sIOConsoleDefaultForegroundColor = kIOConsoleColorWhite;
+static IOGraphicsColor sIOConsoleBackgroundColor = kIOConsoleColorBlack;
+
+void IOConsoleInit(IOGraphicsContext *context) {
+    sIOGraphicsContextPointer = context;
+    sIOConsoleCursorPosition.x = 0;
+    sIOConsoleCursorPosition.y = 0;
+
+    sIOConsoleFont.size.height = 16;
+    sIOConsoleFont.size.width = 8;
+    sIOConsoleFont.baseAddress = (const unsigned char*)VGAFont;
+}
+
+UInt64 IOConsoleGetColors() {
+    return ((UInt64) sIOConsoleForegroundColor << 32) | sIOConsoleBackgroundColor;
+}
+
+void IOConsoleClear(IOGraphicsColor color) {
+    if (!sIOGraphicsContextPointer) return;
+
+    IOGraphicsPoint point = {0, 0};
+    IOGraphicsDrawRectangle(
+        sIOGraphicsContextPointer, 
+        &point, 
+        &sIOGraphicsContextPointer->dimensions,
+        color
+    );
+    
+    sIOConsoleCursorPosition.x = 0;
+    sIOConsoleCursorPosition.y = 0;
+    sIOConsoleBackgroundColor = color;
+}
+
+IOGraphicsContext* IOConsoleGetGraphicsContext() {
+    return sIOGraphicsContextPointer;
+}
+
+IOGraphicsSize IOConsoleGetDimensions() {
+    return sIOGraphicsContextPointer->dimensions;
+}
+
+void IOConsoleSetCursorPosition(IOGraphicsPoint* point) {
+    if (!point) return;
+    sIOConsoleCursorPosition.x = point->x;
+    sIOConsoleCursorPosition.y = point->y;
+}
+
+void IOConsolePutcharacter(char character) {
+    IOSerialWriteChar(character);
+    if (!sIOGraphicsContextPointer) return;
+    if (character == '\n') {
+        sIOConsoleCursorPosition.x = 0;
+        sIOConsoleCursorPosition.y += sIOConsoleFont.size.height;
+    } else if (character == '\t') {
+        sIOConsoleCursorPosition.x += sIOConsoleFont.size.width * 4;
+    } else if (character == '\b') {
+        sIOConsoleCursorPosition.x -= sIOConsoleFont.size.width;
+        IOGraphicsDrawRectangle(
+            sIOGraphicsContextPointer, 
+            &sIOConsoleCursorPosition, 
+            &sIOConsoleFont.size, 
+            sIOConsoleBackgroundColor
+        );
+    } else {
+        IOGraphicsDrawCharacter(
+            sIOGraphicsContextPointer, 
+            &sIOConsoleCursorPosition, 
+            character, 
+            sIOConsoleForegroundColor, 
+            &sIOConsoleFont
+        );
+        sIOConsoleCursorPosition.x += sIOConsoleFont.size.width;
+    }
+
+    if (sIOConsoleCursorPosition.x >= sIOGraphicsContextPointer->dimensions.width) {
+        sIOConsoleCursorPosition.x = 0;
+        sIOConsoleCursorPosition.y += sIOConsoleFont.size.height;
+    }
+    if (sIOConsoleCursorPosition.y >= sIOGraphicsContextPointer->dimensions.height) {
+        IOConsoleClear(sIOConsoleBackgroundColor); // TODO: do scrolling
+    }
+}
+
+void IOConsolePrint(const char *string) {
+    for (Int32 i = 0; string[i] != '\0'; i++) IOConsolePutcharacter(string[i]);
+}
+
+static void sIOConsolePrintDecimal(const Int64 number) {
+    if (number < 0) IOConsolePutcharacter('-');
+    UInt64 unsignedNumber = abs(number);
+    char buffer[32];
+    Int32 i = 0;
+
+    do {
+        buffer[i] = (unsignedNumber % 10) + '0';
+        unsignedNumber /= 10;
+        i++;
+    } while (unsignedNumber > 0);
+
+    while (--i >= 0) {
+        IOConsolePutcharacter(buffer[i]);
+    }
+}
+
+static void sIOConsolePrintHexadecimal(UInt64 unsignedNumber, UInt8 padding) {
+    IOConsolePutcharacter('0');
+    IOConsolePutcharacter('x');
+
+    if (unsignedNumber == 0) {
+        IOConsolePutcharacter('0');
+        for (Int32 i = 1; i < padding; i++) IOConsolePutcharacter('0'); 
+        return;
+    }
+
+    char buffer[16] = {0}; 
+    Int32 i = 0;
+
+    do {
+        Int32 digit = unsignedNumber % 16;
+        if (digit < 10) buffer[i++] = digit + '0';
+        else            buffer[i++] = digit - 10 + 'A';
+        unsignedNumber /= 16;
+    } while (unsignedNumber > 0);
+
+    while(i < padding) {
+        IOConsolePutcharacter('0');
+        padding--;
+    }
+
+    while (--i >= 0) {
+        IOConsolePutcharacter(buffer[i]);
+    }
+}
+
+
+void IOConsoleLog(const char *fmt, ...) {
+    va_list args;
+    va_start(args, fmt);
+
+    for (Int32 i = 0; fmt[i] != '\0'; i++) {
+        if (fmt[i] == '%') {
+            i++;
+            switch (fmt[i]) {
+                case 's': {
+                    const char *string = va_arg(args, const char*);
+                    if (!string) string = "undefined";
+                    IOConsolePrint(string);
+                    break;
+                }
+                case 'c': {
+                    char character = (char)va_arg(args, int);
+                    IOConsolePutcharacter(character);
+                    break;
+                }
+                case 'd': {
+                    Int32 number = va_arg(args, Int32);
+                    sIOConsolePrintDecimal(number);
+                    break;
+                }
+                case 'x': {
+                    UInt64 number = va_arg(args, UInt64);
+                    sIOConsolePrintHexadecimal(number, 0);
+                    break;    
+                }
+                case 'X' : {
+                    UInt64 number = va_arg(args, UInt64);
+                    sIOConsolePrintHexadecimal(number, 16);
+                    break;
+                }
+                default: {
+                    IOConsolePutcharacter(fmt[i]);
+                    break;
+                }
+            }
+        } else if (fmt[i] == '^') {
+            i++;
+            switch (fmt[i]) {
+                case 'r': IOConsoleSetForegroundColor(kIOConsoleColorRed);       break;
+                case 'R': IOConsoleSetForegroundColor(kIOConsoleColorVeryRed);   break;
+                case 'g': IOConsoleSetForegroundColor(kIOConsoleColorGreen);     break;
+                case 'G': IOConsoleSetForegroundColor(kIOConsoleColorVeryGreen); break;
+                case 't': IOConsoleSetForegroundColor(kIOConsoleColorTurqoise);  break;
+                case 'b': IOConsoleSetForegroundColor(kIOConsoleColorBlue);      break;
+                case 'B': IOConsoleSetForegroundColor(kIOConsoleColorVeryBlue);  break;
+                case 'l': IOConsoleSetForegroundColor(kIOConsoleColorLightBlue); break;
+                case 'y': IOConsoleSetForegroundColor(kIOConsoleColorYellow);    break;
+                case 'c': IOConsoleSetForegroundColor(kIOConsoleColorCyan);      break;
+                case 'm': IOConsoleSetForegroundColor(kIOConsoleColorMagneta);   break;
+                case 'p': IOConsoleSetForegroundColor(kIOConsoleColorPink);      break;
+                case '0': IOConsoleSetForegroundColor(kIOConsoleColorBlack);     break;
+                case 'w': IOConsoleSetForegroundColor(kIOConsoleColorWhite);     break;
+
+                case '!': IOConsoleSetForegroundColor(sIOConsoleDefaultForegroundColor); break;
+                case '~': IOConsoleSetForegroundColor(~sIOConsoleBackgroundColor);       break;
+                
+                case '^': IOConsolePutcharacter('^'); break;
+                
+                default: { 
+                    IOConsolePutcharacter('^');
+                    IOConsolePutcharacter(fmt[i]);
+                    break; 
+                }
+            }
+        } else {
+            IOConsolePutcharacter(fmt[i]);
+        }
+    }
+
+    va_end(args);
+}
+
+void IOConsoleSetForegroundColor(UInt32 color) {
+    sIOConsoleForegroundColor = color;
+}
+
+void IOConsoleSetDefaultForegroundColor(UInt32 color) {
+    sIOConsoleDefaultForegroundColor = color;
+}
+
+void IOConsoleReadLine(char* buffer, UInt32 limit) {
+    UInt32 i = 0;
+    while (true) {
+        char character = IOKeyboardGetCharacter();
+        switch (character) {
+            case '\n': { 
+                buffer[i] = '\0';
+                IOConsoleLog("\n");
+                return;
+            }
+            case '\b': {
+                if (i > 0) {
+                    i--;
+                    IOConsoleLog("\b \b");
+                }
+                break;
+            }
+            default: {
+                if (i < limit - 1) { 
+                    buffer[i] = character;
+                    IOConsoleLog("%c", character);
+                    i++;
+                }
+            }
+        }
+    }
+}

kernel/src/IO/IOGraphics.c

@@ -0,0 +1,82 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+// RIP shitgui -- you started it all
+
+#include <OS/OSScheduler.h>
+#include <OS/OSPanic.h>
+#include <IO/IOGraphics.h>
+#include <VM/Heap.h>
+#include <lib/String.h>
+
+enum {
+    kIOGraphicsTransparencyKey = 0xFF00FF
+};
+
+UInt32 IOGraphicsGetPixel(IOGraphicsContext* context, IOGraphicsPoint* point) {
+    if (!context->framebuffer || !point || point->x >= context->dimensions.width || point->y >= context->dimensions.height) return 0;
+    return context->framebuffer[point->y * context->pixelsPerScanLine + point->x];
+}
+
+void IOGraphicsDrawImage(IOGraphicsContext* context, IOGraphicsPoint* point, IOGraphicsImage* image) {
+    if (!context->framebuffer || !image) return;
+
+    UInt32 startX = point->x;
+    UInt32 startY = point->y;
+    UInt32 drawW = image->size.width;
+    UInt32 drawH = image->size.height;
+
+    if (startX >= context->dimensions.width || startY >= context->dimensions.height) return;
+    if (startX + drawW > context->dimensions.width) drawW = context->dimensions.width - startX;
+    if (startY + drawH > context->dimensions.height) drawH = context->dimensions.height - startY;
+
+    for (UInt32 y = 0; y < drawH; y++) {
+        volatile UInt32 *destinationPointer = &context->framebuffer[(startY + y) * context->pixelsPerScanLine + startX];
+        UInt32 *sourcePointer = &image->buffer[y * image->size.width];
+        for (UInt32 x = 0; x < drawW; x++) {
+            UInt32 color = sourcePointer[x];
+            if (color != kIOGraphicsTransparencyKey) destinationPointer[x] = color;
+        }
+    }
+}
+
+void IOGraphicsDrawRectangle(IOGraphicsContext* context, IOGraphicsPoint* point, IOGraphicsSize* size, IOGraphicsColor color) {
+    if (!context->framebuffer) return;
+
+    UInt32 startX = point->x;
+    UInt32 startY = point->y;
+    UInt32 drawW = size->width;
+    UInt32 drawH = size->height;
+
+    if (startX >= context->dimensions.width || startY >= context->dimensions.height) return;
+    if (startX + drawW > context->dimensions.width) drawW = context->dimensions.width - startX;
+    if (startY + drawH > context->dimensions.height) drawH = context->dimensions.height - startY;
+
+
+    for (UInt32 y = 0; y < drawH; y++) {
+        volatile UInt32* rowPointer = &context->framebuffer[(startY + y) * context->pixelsPerScanLine + startX];
+        for (UInt32 x = 0; x < drawW; x++) rowPointer[x] = color;
+    }
+}
+
+void IOGraphicsDrawCharacter(IOGraphicsContext* context, IOGraphicsPoint* point, char c, IOGraphicsColor color, IOGraphicsFont* font) {
+    if (!context->framebuffer) return;
+
+    UInt32 startX = point->x;
+    UInt32 startY = point->y;
+    UInt32 drawW = font->size.width;
+    UInt32 drawH = font->size.height;
+
+    if (startX >= context->dimensions.width || startY >= context->dimensions.height) return;
+    if (startX + drawW > context->dimensions.width) drawW = context->dimensions.width - startX;
+    if (startY + drawH > context->dimensions.height) drawH = context->dimensions.height - startY;
+
+    for (UInt32 y = 0; y < drawH; y++) {
+        UInt8 bitmapRow = font->baseAddress[(unsigned char)c * font->size.height + y];
+        volatile UInt32 *rowPointer = &context->framebuffer[(startY + y) * context->pixelsPerScanLine + startX];
+        for (UInt32 x = 0; x < drawW; x++) {
+            if (bitmapRow & (1 << (7 - x))) {
+                rowPointer[x] = color;
+            }
+        }
+    }
+}

kernel/src/IO/IOKeyboard.c

@@ -1,13 +1,15 @@
 // SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2025 0xKarinyash
+// Copyright (c) 2026 0xKarinyash
 
-#include <drivers/keyboard.h>
-#include <drivers/console.h>
+#include <IO/IOKeyboard.h>
+#include <IO/IOConsole.h>
+#include <OS/OSSpinlock.h>
+#include <OS/OSScheduler.h>
 
-#include <io.h>
+#include <IO.h>
 #include <types.h>
 
-unsigned char keyboard_map[128] = {
+static unsigned char sIOKeyboardMap[128] = {
     0,  27, '1', '2', '3', '4', '5', '6', '7', '8', /* 0x00 - 0x09 */
     '9', '0', '-', '=', '\b', /* Backspace */
     '\t',                 /* Tab */
@@ -46,7 +48,7 @@ unsigned char keyboard_map[128] = {
     0,  /* All other keys are undefined */
 };
 
-unsigned char keyboard_map_shifted[128] = {
+static unsigned char sIOKeyboardMapShifted[128] = {
     0,  27, '!', '@', '#', '$', '%', '^', '&', '*', /* 0x00 - 0x09 */
   '(', ')', '_', '+', '\b', /* Backspace */
   '\t',                 /* Tab */
@@ -85,31 +87,55 @@ unsigned char keyboard_map_shifted[128] = {
     0,  /* All other keys */
 };
 
-bool shift_pressed = false;
-kb_buffer kb_buf = {0};
+static Boolean sIOKeyboardIsShiftPressed = false;
 
-void kb_handler() {
-    u16 next_head = (kb_buf.head + 1) % KB_BUFF_SIZE;
+IOKeyboardController gIOKeyboardController = {0};
 
-    u8 scancode = inb(0x60);
+void IOKeyboardInterruptsHandler() {
+    OSSpinlockLock(&gIOKeyboardController.lock);
+    UInt16 nextHead = (gIOKeyboardController.head + 1) % kIOKeyboardBufferSize;
+
+    UInt8 scancode = IOPortRead8(0x60);
     // make code 0x00 - 0x7F; break code = make code + 0x80
     if (scancode < 0x80) {
-        unsigned char* arr = shift_pressed ? keyboard_map_shifted : keyboard_map;
-        char ascii = arr[scancode];
-        if (ascii && next_head != kb_buf.tail) {
-            kb_buf.buffer[kb_buf.head] = ascii;
-            kb_buf.head = next_head;
+        unsigned char* keyMap = sIOKeyboardIsShiftPressed ? sIOKeyboardMapShifted : sIOKeyboardMap;
+        char ascii = keyMap[scancode];
+        if (ascii && nextHead != gIOKeyboardController.tail) {
+            gIOKeyboardController.buffer[gIOKeyboardController.head] = ascii;
+            gIOKeyboardController.head = nextHead;
         } else {
             switch (scancode) {
-                case 0x2A: shift_pressed = true; break;
+                case 0x2A: sIOKeyboardIsShiftPressed = true; break;
                 default: break;
             }
         }
     } else {
         switch (scancode) {
-            case 0xAA: shift_pressed = false; break;
+            case 0xAA: sIOKeyboardIsShiftPressed = false; break;
             default: break;
         }
     }
-    outb(MASTER_COMMAND, 0x20);
+
+    OSSpinlockUnlock(&gIOKeyboardController.lock);
+}
+
+char IOKeyboardGetCharacter() {
+    char ascii = 0;
+    OSSpinlockState state;
+
+    while (true) {
+        OSSpinlockLockIRQ(&gIOKeyboardController.lock, &state);
+        
+        if (gIOKeyboardController.head != gIOKeyboardController.tail) {
+            ascii = gIOKeyboardController.buffer[gIOKeyboardController.tail];
+            gIOKeyboardController.tail = (gIOKeyboardController.tail + 1) % kIOKeyboardBufferSize;
+            
+            OSSpinlockUnlockIRQ(&gIOKeyboardController.lock, &state);
+            return ascii;
+        }
+        
+        OSSpinlockUnlockIRQ(&gIOKeyboardController.lock, &state);
+        __asm__ volatile ("sti");
+        OSSchedulerYield(1);
+    }
 }

kernel/src/IO/IOSerial.c

@@ -0,0 +1,33 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#include <IO/IOSerial.h>
+#include <IO.h>
+
+enum {
+    kIOCom1Port = 0x3F8,
+};  
+
+int IOSerialInit() {
+    IOPortWrite8(kIOCom1Port + 1, 0x00); // interrupt enable register (+1) / disable interruptions
+    IOPortWrite8(kIOCom1Port + 3, 0x80); // line control register (+3) 
+    IOPortWrite8(kIOCom1Port + 0, 0x03); // speed : low byte
+    IOPortWrite8(kIOCom1Port + 1, 0x00); // speed : high byte
+    IOPortWrite8(kIOCom1Port + 3, 0x03); // line control register (+3) / reset DLAB / no parity / 1 stop bit / (8N1)
+    IOPortWrite8(kIOCom1Port + 2, 0xC7); // FIFO Control register (+2) / 1100 0111 / last ones are enable FIFO buff / first ones to clean noise
+    IOPortWrite8(kIOCom1Port + 4, 0x0B); // ready :3
+    return 0;
+}
+
+static int IOCheckIsTransmitEmpty() { 
+    return IOPortRead8(kIOCom1Port + 5) & 0x20; // checking 5th bit LSR 
+}
+
+void IOSerialWriteChar(char character) {
+    while (IOCheckIsTransmitEmpty() == 0); // waiting for buffer to flush (spinlock)
+    IOPortWrite8(kIOCom1Port, character);
+}
+
+void IOSerialWrite(const char* string) {
+    for (int i = 0; string[i] != '\0'; i++) IOSerialWriteChar(string[i]);
+}

kernel/src/IO/IOTimer.c

@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#include <IO/IOTimer.h>
+#include <IO.h>
+#include <types.h>
+#include <OS/OSScheduler.h>
+
+enum {
+    kIOTimerPitBaseClock = 1193180,
+    kIOTimerPitCommand = 0x43,
+    kIOTimerPitData = 0x40,
+};
+
+static volatile UInt64 sIOTimerTicks = 0;
+
+void IOTimerInitialize(UInt32 frequency) {
+    UInt32 divisor = kIOTimerPitBaseClock / frequency;
+
+    IOPortWrite8(kIOTimerPitCommand, 0x36); // 0x36 = 00110110 = channel 0, LOHI byte access, Mode 3, binary
+    IOPortWrite8(kIOTimerPitData, divisor & 0xFF);
+    IOPortWrite8(kIOTimerPitData, (divisor >> 8) & 0xFF);
+
+    UInt8 mask = IOPortRead8(0x21); 
+    mask &= ~(1 << 0);
+    IOPortWrite8(0x21, mask);
+}
+
+UInt64 IOTimerInterruptsHandler(CPURegisters *registers) {
+    sIOTimerTicks++;
+    return OSSchedulerNext((UInt64)registers);
+}
+
+UInt64 IOTimerGetTicks() {
+    return sIOTimerTicks;
+}

kernel/src/KSH/KSHBuiltins.c

@@ -0,0 +1,106 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#include <types.h>
+#include <OSCPU.h>
+
+#include <IO/IOConsole.h>
+#include <IO/IOTimer.h>
+
+#include <lib/String.h>
+#include <lib/Rand.h>
+
+#include <OS/OSScheduler.h>
+
+#include <VM/VMM.h>
+#include <VM/Heap.h>
+
+#include <KSH/KSHDebug.h>
+
+#include <Data/cats.h>
+
+
+const char* asciiLogo[] = {
+    "      /\\___/\\     ", 
+    "     |  > <  |     ", 
+    "     |   w   |     ",
+    "     |=======|__   ", 
+    "     |       |  |  ", 
+    "     |TERMOS |  |  ", 
+    "     |       |__|  ",
+    "     |_______|     " 
+};
+
+void KSHCommandKernelFetch() {
+    UInt64 uptimeSeconds = IOTimerGetTicks() / 1000;
+
+    IOConsoleLog("\n\n");
+    IOConsoleLog("^p %s ^!\t\t^g kernel^!@^gtermos\n^0", asciiLogo[0]);
+    IOConsoleLog("^p %s ^!\t\t^!-------------\n^!", asciiLogo[1]);
+    IOConsoleLog("^p %s ^!\t\t^gOS^!: termOS %s\n^!", asciiLogo[2], TERMOS_VERSION);   
+    IOConsoleLog("^p %s ^!\t\t^gKernel^!: Dewar (x86_64), build: %s %s\n^!", asciiLogo[3], __DATE__, __TIME__);   
+    IOConsoleLog("^p %s ^!\t\t^gUptime^!: %d seconds\n^!", asciiLogo[4], uptimeSeconds);   
+    IOConsoleLog("^p %s ^!\t\t^gShell^!: ksh\n^!", asciiLogo[5]);   
+    IOConsoleLog("^p %s ^!\t\t^gDE^!: shitgui\n^!", asciiLogo[6]);   
+    IOConsoleLog("^p %s ^!\t\t^gCPU^!: %s (^yFamily^!: %d; ^yModel^!: %d)\n^!", asciiLogo[7], gOSBootCPU.vendorID, gOSBootCPU.family, gOSBootCPU.model);
+    IOConsoleLog("\n\n");
+}
+
+void KSHCommandMeow() {
+    UInt64 catsCount = sizeof(cats) / sizeof(cats[0]);
+    UInt8 randomNumber = Rand() % catsCount;
+    IOConsoleLog("Nyaaa!!\n\n%s\n\n", cats[randomNumber]);
+}
+
+void KSHCommandHelp() {
+    IOConsoleLog("Welcome to ^ptermOS^!'s ^gk^!ernel ^gsh^!ell!\n");
+    IOConsoleLog("It loads when userspace is failed to load and acts as a basic rescue environment\n");
+    IOConsoleLog("Available commands:\n");
+    
+    IOConsoleLog("\t^rDebug^!:\n");
+    IOConsoleLog("\t\t^ysleep^!       \t\tSleep for 3seconds\n");
+    IOConsoleLog("\t\t^ydbg^!         \t\tTest new stuff\n");
+    IOConsoleLog("\t\t^yregs^!        \t\tPrint current regs\n");
+    IOConsoleLog("\t\t^ypanic^!       \t\tPanics (lol)\n");
+    IOConsoleLog("\t\t^yud2^!         \t\tPanics with #UD\n");
+    IOConsoleLog("\t\t^ypf^!          \t\tPanics with #PF\n");
+
+    IOConsoleLog("\t^pFun^!:\n");
+    IOConsoleLog("\t\t^ysplash^!      \t\tShows splash (works kinda unstable)\n");
+    IOConsoleLog("\t\t^ymeow^!        \t\tcats!!!\n");
+    IOConsoleLog("\t\t^ykfetch^!      \t\tr/unixporn compatible\n");
+    
+    IOConsoleLog("\t^bMisc^!:\n");
+    IOConsoleLog("\t\t^yclear^!       \t\tClear console\n");
+    IOConsoleLog("\t\t^yhelp^!        \t\tShow this menu\n");
+    IOConsoleLog("\t\t^yrand^!        \t\tGet a random number\n");
+    IOConsoleLog("\t\t^yver^!         \t\tDisplays termOS's version\n");
+}
+
+void KSHCommandRegisters() {
+    __asm__ volatile ("int3");
+} 
+
+void KSHCommandSleep() {
+    OSSchedulerYield(3000);
+}
+
+void KSHCommandRand() {
+    IOConsoleLog("Your rand number (0..100) is ... ^y%d^!!\n", Rand() % 100);
+}
+
+void KSHCommandDebug() {
+    UInt64 status = KSHDebug();
+    IOConsoleLog("\nDebug ended with code %d\n", status);
+    return;
+}
+
+void KSHCommandVer() {
+    IOConsoleLog("termOS version %s\n", TERMOS_VERSION);
+    IOConsoleLog("Dewar Kernel (x86_64), build: %s %s\n", __DATE__, __TIME__);
+    IOConsoleLog("License: GPL-3.0-or-later\n");
+}
+
+void cmd_userspace() {
+    IOConsoleLog("Command disabled due to be really broken\n");
+}

kernel/src/KSH/KSHDebug.c

@@ -1,9 +1,9 @@
 // SPDX-License-Identifier: GPL-3.0-or-later
 // Copyright (c) 2026 0xKarinyash
 
-#include <shell/dbgcmd.h>
-#include <drivers/console.h>
+#include <KSH/KSHDebug.h>
+#include <IO/IOConsole.h>
 
-u64 debug() {
+UInt64 KSHDebug() {
     return 0;
 }

kernel/src/KSH/KSHEntry.c

@@ -0,0 +1,109 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#include <KSH/KSHEntry.h>
+#include <KSH/KSHBuiltins.h>
+
+#include <IO/IOConsole.h>
+#include <IO/IOGraphics.h>
+
+#include <OS/OSPanic.h>
+#include <OS/OSScheduler.h>
+
+#include <lib/String.h>
+#include <lib/Rand.h>
+#include <lib/Splash.h>
+
+typedef enum {
+    TOKEN_EMPTY,
+
+    TOKEN_NULL,
+    TOKEN_ILLEGAL,
+    
+    TOKEN_HELP,
+    TOKEN_SPLASH,
+
+    TOKEN_KFETCH,
+    TOKEN_MEOW,
+
+    TOKEN_SLEEP,
+
+    TOKEN_REGS,
+    TOKEN_DEBUG,
+    TOKEN_RECTEST,
+    TOKEN_PANIC,
+    TOKEN_PANIC_UD2,
+    TOKEN_PANIC_PF,
+
+    TOKEN_CLEAR,
+    TOKEN_RAND,
+    TOKEN_VER,
+
+    TOKEN_BACK,
+    TOKEN_FORWARD,
+} KSHToken;
+
+typedef struct {
+    char* str;
+    KSHToken token;
+} KSHCommandMap;
+
+static const KSHCommandMap CommandMap[] = {
+    {"", TOKEN_EMPTY},    
+    // debug
+    {"sleep", TOKEN_SLEEP},
+    {"dbg", TOKEN_DEBUG},
+    {"regs", TOKEN_REGS},
+    {"panic", TOKEN_PANIC},
+    {"ud2", TOKEN_PANIC_UD2},
+    {"pf", TOKEN_PANIC_PF},
+
+    // fun
+    {"meow", TOKEN_MEOW},
+    {"splash", TOKEN_SPLASH},
+    {"kfetch", TOKEN_KFETCH},
+
+    // misc
+    {"help", TOKEN_HELP},
+    {"clear", TOKEN_CLEAR},
+    {"rand", TOKEN_RAND},
+    {"ver", TOKEN_VER},
+
+    {nullptr, TOKEN_NULL}
+};
+
+KSHToken KSHCharacter2Token(char* token) {
+    for (Int32 i = 0; CommandMap[i].str != nullptr; i++) {
+        if (StringCompare(token, CommandMap[i].str) == 0) return CommandMap[i].token;
+    }
+    return TOKEN_ILLEGAL;
+}
+
+void KSHEntry() {
+    while (true) {
+        IOConsoleLog("ksh_> ");
+        char cmdbuff[256];
+        IOConsoleReadLine(cmdbuff, 256);
+        switch(KSHCharacter2Token(cmdbuff)) {
+            case TOKEN_EMPTY: continue;
+
+            case TOKEN_CLEAR: IOConsoleClear((UInt32) IOConsoleGetColors() & 0xFFFFFFFF); break;
+            case TOKEN_RAND: KSHCommandRand(); break;
+            case TOKEN_VER: KSHCommandVer(); break;
+
+            case TOKEN_SLEEP: KSHCommandSleep(); break;
+            case TOKEN_DEBUG: KSHCommandDebug(); break;
+            case TOKEN_REGS: KSHCommandRegisters(); break;
+            case TOKEN_PANIC: OSPanic("Manually initiated panic");
+            case TOKEN_PANIC_UD2: __asm__ volatile ("ud2");
+            case TOKEN_PANIC_PF: UInt64* bad_ptr = (UInt64*)0xDEADBEEF; *bad_ptr = 666;
+
+            case TOKEN_SPLASH: SplashShow(IOConsoleGetGraphicsContext()); break;
+            case TOKEN_KFETCH: KSHCommandKernelFetch(); break;
+            case TOKEN_MEOW: KSHCommandMeow(); break;
+            
+            case TOKEN_HELP: KSHCommandHelp(); break;
+            default: IOConsoleLog("Unknown command!!\n"); break;
+        }
+    }
+}

kernel/src/OS/Exec/HOTLoader.c

@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#include <OS/Exec/HOTLoader.h>
+#include <OS/OSScheduler.h>
+#include <lib/String.h>
+
+#include <VM/PMM.h>
+#include <VM/VMM.h>
+#include <VM/Heap.h>
+
+#include "../../common/hot_header.h"
+
+UInt64 HOTLoad(OSProcess* process, UInt8* data) {
+    HOTHeader* header = (HOTHeader*)data;
+    if (header->magic != HOT_MAGIC) {
+        return -1;
+    }
+
+    HOTSegment* segments = (HOTSegment*)(data + sizeof(HOTHeader));
+    for (UInt64 i = 0; i < header->segments_count; i++) {
+        HOTSegment* segment = &segments[i];
+        if (segment->memsz == 0) continue;
+
+        UInt64 start = segment->vaddr & ~(0xFFFULL);
+        UInt64 end = (segment->vaddr + segment->memsz + 0xFFF) & ~(0xFFFULL);
+
+        for (UInt64 address = start; address < end; address += kVMPageSize) {
+            void* physicalPage = VMPhysicalMemoryAllocatePage();
+            VMVirtualMemoryMapPage((UInt64*)process->physicalPML4, (UInt64)physicalPage, address, PTE_USER | PTE_RW | PTE_PRESENT);
+            void* kernelVirtAddress = (void*)((UInt64)physicalPage + HHDM_OFFSET);
+            MemorySet(kernelVirtAddress, 0, kVMPageSize);
+            UInt64 pageOverleapStart = (address > segment->vaddr) ? address : segment->vaddr;
+            UInt64 pageOverleapEnd = (address + kVMPageSize < segment->vaddr + segment->filesz) 
+                ? (address + kVMPageSize) 
+                : (segment->vaddr + segment->filesz);
+            if (pageOverleapStart < pageOverleapEnd) {
+                UInt64 copySize = pageOverleapEnd - pageOverleapStart;
+                UInt64 sourceOffset = segment->offset + (pageOverleapStart - segment->vaddr);
+                UInt64 destinationOffset = pageOverleapStart - address;
+
+                MemoryCopy((UInt8*)kernelVirtAddress + destinationOffset, data + sourceOffset, copySize);
+            }
+        }
+    }
+
+    return header->entry_point;
+}

kernel/src/OS/Exec/OSLoader.c

@@ -0,0 +1,81 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#include <OS/Exec/HOTLoader.h>
+#include <OS/Exec/OSLoader.h>
+#include <OS/OSPanic.h>
+#include <OS/OSScheduler.h>
+#include <lib/String.h>
+
+
+#include <VM/PMM.h>
+#include <VM/VMM.h>
+#include <VM/Heap.h>
+
+#include <FS/VFS.h>
+
+#include <IO/IOConsole.h>
+#include <types.h>
+
+extern UInt32 gOSSchedulerNextProcessID;
+
+enum {
+    kOSUserStackTop = 0x70000000,
+    kOSHeapStart = 0x40000000
+};
+
+
+Int32 OSLoaderProcessSpawn(const char* executablePath, const char* processName) {
+    FSVNode* executableFile = FSVirtualFileSystemOpenPath(executablePath);
+    if (!executableFile) {
+        return -1;
+    }
+
+    OSProcess* newProcess = (OSProcess*)VMHeapAllocate(sizeof(OSProcess));
+    if (!newProcess) {
+        return -2;
+    }
+
+    MemorySet(newProcess, 0, sizeof(OSProcess));
+    newProcess->processId = gOSSchedulerNextProcessID++; 
+    newProcess->state = kOSProcessStateRunning; 
+    newProcess->physicalPML4 = VMVirtualMemoryCreateAddressSpace();
+    newProcess->heapStartPointer = kOSHeapStart;
+    newProcess->heapCurrentPointer = kOSHeapStart;
+    StringCopyWithLimit(newProcess->name, processName, 31);
+
+    UInt8* imageBuffer = (UInt8*)VMHeapAllocate(executableFile->dataLength);
+    if (!imageBuffer) {
+        VMHeapFree(newProcess);
+        return -3;
+    }
+
+    FSVNodeRead(executableFile, 0, executableFile->dataLength, imageBuffer);
+
+    UInt64 entryPoint = HOTLoad(newProcess, imageBuffer);
+    if (!entryPoint) {
+        VMHeapFree(imageBuffer);
+        VMHeapFree(newProcess);
+        return -4;
+    }
+
+    VMHeapFree(imageBuffer);
+
+    VMVirtualMemorySetupUserStack((UInt64*)newProcess->physicalPML4);
+    
+    if (!OSSchedulerSpawn((void(*)())entryPoint, newProcess, true, kOSUserStackTop)) {
+        VMHeapFree(newProcess);
+        return -5;
+    }
+
+    return newProcess->processId;
+}
+
+void init_task_entry() {
+    Int32 pid = OSLoaderProcessSpawn("/System/CoreServices/init", "init");
+    if (pid < 0) {
+        OSPanic("FATAL: Failed to spawn /System/CoreServices/init");
+    }
+
+    while (1) { __asm__("sti; hlt"); }
+}

kernel/src/OS/OSPanic.c

@@ -0,0 +1,166 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#include <OS/OSPanic.h>
+#include <lib/Rand.h>
+
+#include <IO/IOGraphics.h>
+#include <IO/IOConsole.h>
+
+#include <types.h>
+
+static const char* sOSPanicFunMessages[] = {
+    "Execution finished abnormally with code: 0x_x",
+    "It's definitely your fault.",
+    "No more Roblox!",
+    "Call your mom 4 help!",
+    "2bad4u",
+    "Touch grass",
+    "Skill issue",
+    "You should just go outside actually",
+    "Perfect opportunity to take a shower",
+    "404 not found",
+    "Windows is locked! Password:___ Time left: 5:45:41",
+    "GOOOOOAL",
+    "\"NAM PIZDA\": hackers dropped our registry",
+    "geeked vs locked in",
+    "HEEEELP!",
+    "LET ME GO!",
+    "You little asshole, make it better",
+    "Go and read books for programming u idiot",
+    "TIME TO BRAKE! :3 Take a tea and try again later cutie",
+    "Code have been eaten by Aliens",
+    "That's all, folks!",
+    "Raiden, answer me, Raiden, respond! Raiden?! RAIDEEEEEEEEEN!",
+    "I'll be back",
+    "Hastla la vista, baby",
+    "Ti chego mne tut nagovoril...",
+    "Have you tried turning it off and on again?",
+    "Put it in rice maybe?",
+    "Just hit the monitor, it usually helps",
+    "I think it needs a rest. Come back tomorrow",
+    "You clicked something wrong, didn't you?",
+    "You hacked it too hard, bro",
+    "I think you deleted the internet",
+    "Stop downloading RAM",
+    "Pro tip: dont crash",
+    "Stop ricing the kernel you loonixtard, TermOS is NOT Loonix",
+    "Attaboy, Jack. He's good. Really good.",
+    "Zhenih priehal",
+    "YOUR PC WAS BLOCKED BY FBI FOR WATCHING PORNOGRAPHY SEND 20 US DOLLARS",
+    "fuck off",
+    "Your GPU is now mining Ethereum for me. Thanks.",
+    "Your PC is locked!\n\t\t\t\tPay a fee of 0.019082006 bitcoins to a wallet 1KtoProchitalTotSosal to get decryption key!",
+};
+
+
+static const char* sOSPanicExceptionMessages[] = {
+    "Division By Zero",
+    "Debug",
+    "Non Maskable Interrupt",
+    "Breakpoint",
+    "Into Detected Overflow",
+    "Out of Bounds",
+    "Invalid Opcode",
+    "Device Not Available",
+    "Double Fault",
+    "Coprocessor Segment Overrun",
+    "Bad TSS",
+    "Segment Not Present",
+    "Stack Fault",
+    "General Protection Fault",
+    "Page Fault",
+    "Reserved",
+    "x87 Floating-Point Exception",
+    "Alignment Check",
+    "Machine Check",
+    "SIMD Floating-Point Exception",
+    "Virtualization Exception",
+    "Control Protection Exception",
+    "Reserved",
+    "Reserved",
+    "Reserved",
+    "Reserved",
+    "Reserved",
+    "Reserved",
+    "Hypervisor Injection Exception",
+    "VMM Communication Exception",
+    "Security Exception", 
+    "Reserved"          
+};
+
+__attribute__((noreturn)) static void die() {
+    while (1) { 
+        __asm__ volatile ("cli; hlt"); 
+    }
+}
+
+static void sOSPanicDrawPanicBackground() {
+    IOConsoleClear(0x000000);
+    IOConsoleSetForegroundColor(0xFFFFFF);
+    IOConsoleSetDefaultForegroundColor(0xFFFFFF);
+    
+    UInt64 funMessagesCount = sizeof(sOSPanicFunMessages) / sizeof(sOSPanicFunMessages[0]);
+    UInt8 randNum = Rand() % funMessagesCount;
+
+    IOConsoleLog("\n\n");
+    IOConsoleLog("\t\t\t\t^bKERNEL PANIC^!  :( \n");
+    IOConsoleLog("\t\t--------------------------------\n");
+    IOConsoleLog("\t\t^y%s^!\n", sOSPanicFunMessages[randNum]);
+    IOConsoleLog("\t\t--------------------------------\n");
+}
+
+__attribute__((noreturn)) void OSPanicException(CPURegisters* frame) {
+    sOSPanicDrawPanicBackground();
+
+    IOConsoleLog("\t\t^yCPU EXCEPTION^!: ^b%s^! (%d)\n", sOSPanicExceptionMessages[frame->interruptNumber], frame->interruptNumber);
+    if (frame->errorCode) IOConsoleLog("\t\t^yError Code^!: %X\n", frame->errorCode);
+    IOConsoleLog("\t\t^yInstruction Pointer^! (^yRIP^!): %X\n", frame->rip);
+    IOConsoleLog("\t\t^yCode Segment^! (^yCS^!): %X\n", frame->cs);
+    IOConsoleLog("\t\t^yFlags^! (^yRFLAGS^!): %X\n", frame->rflags);
+    IOConsoleLog("\t\t^yStack Pointer^! (^yRSP^!): %X\n", frame->rsp);
+    if (frame->interruptNumber == 14) {
+        IOConsoleLog("\t\t--------------------------------\n");
+        IOConsoleLog("\t\t       ^yPage Fault Helper^!        \n");
+        IOConsoleLog("\t\t--------------------------------\n");
+        UInt64 cr2;
+        __asm__ volatile("mov %%cr2, %0" : "=r"(cr2));
+        IOConsoleLog("\t\t^yFaulting Address^! (^yCR2^!): %X\n", cr2);
+        IOConsoleLog("\t\t^yERRCode^!: %X\n", frame->errorCode);
+        UInt64 present     = (frame->errorCode & (1 << 0)) != 0;
+        UInt64 write       = (frame->errorCode & (1 << 1)) != 0;
+        UInt64 user        = (frame->errorCode & (1 << 2)) != 0;
+        UInt64 reserved    = (frame->errorCode & (1 << 3)) != 0;
+        UInt64 instruction = (frame->errorCode & (1 << 4)) != 0;
+        IOConsoleLog("\t\t\t[^bP^!] ^yReason^!: %s\n", present ? "Page Protection violation" : "Non-present page");
+        IOConsoleLog("\t\t\t[^bW^!] ^yCaused by^! %s\n", write ? "WRITE" : "READ"); 
+        IOConsoleLog("\t\t\t[^bU^!] ^yRing^! %s\n", user ? "3" : "0");
+        if (reserved) IOConsoleLog("\t\t\t[^bR^!] CPU Wrote 1 to a reserved field in page table entry. ^rCorrupt page table?^!\n");
+        if (instruction) IOConsoleLog("\t\t\t[^bI^!] ^yTried to^! execute ^ycode from^! NX ^ymemory^!\n");
+    }
+    IOConsoleLog("\t\t--------------------------------\n");
+    IOConsoleLog("\t\t\t\t^yREGISTERS^!\n");
+    IOConsoleLog("\t\t--------------------------------\n");
+    IOConsoleLog("\t\t^yRAX^!=%X, ^yRBX^!=%X\n",  frame->rax, frame->rbx);
+    IOConsoleLog("\t\t^yRCX^!=%X, ^yRDX^!=%X\n",  frame->rcx, frame->rdx);
+    IOConsoleLog("\t\t^yRSI^!=%X, ^yRDI^!=%X\n",  frame->rsi, frame->rdi);
+    IOConsoleLog("\t\t^yRBP^!=%X, ^yR8^! =%X\n",  frame->rbp, frame->r8);
+    IOConsoleLog("\t\t^yR9^! =%X, ^yR10^!=%X \n", frame->r9,  frame->r10);
+    IOConsoleLog("\t\t^yR11^!=%X, ^yR12^!=%X\n",  frame->r11, frame->r12);
+    IOConsoleLog("\t\t^yR13^!=%X, ^yR14^!=%X\n",  frame->r13, frame->r14);
+    IOConsoleLog("\t\t^yR15^!=%X\n",frame->r15);
+    IOConsoleLog("\t\t--------------------------------\n");
+    IOConsoleLog("\t\t\t\t^bSystem halted.^!\n");
+    
+    die();
+} 
+
+__attribute__((noreturn)) void OSPanic(const char* message) {
+    sOSPanicDrawPanicBackground();
+
+    IOConsoleLog("\t\t^yReason^!: %s\n", message);
+    IOConsoleLog("\t\t--------------------------------\n");
+    IOConsoleLog("\t\t\t\t^bSystem halted.^!\n");
+
+    die();
+}

kernel/src/OS/OSScheduler.c

@@ -0,0 +1,226 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#include <OS/OSScheduler.h>
+#include <OS/OSSpinlock.h>
+#include <OS/OSPanic.h>
+#include <lib/String.h>
+#include <VM/Heap.h>
+#include <VM/VMM.h>
+#include <OSCPU.h>
+#include <GDT.h>
+
+OSTask* gOSSchedulerCurrentTask = nullptr;
+UInt32 gOSSchedulerNextProcessID = 1;
+
+extern void irq0_handler();
+extern UInt64 gVMKernelPML4Physical;
+
+static OSProcess sOSSchedulerKernelProcess;
+static OSSpinlock sOSSchedulerLock;
+
+static OSTask* sOSSchedulerGarbageCollectorTask = nullptr;
+
+void idle_task() {
+    while (1) {
+        __asm__ volatile ("hlt");
+    }
+}
+
+void OSSchedulerGarbageCollector() {
+    OSTask* self = gOSSchedulerCurrentTask;
+
+    while (true) {
+        OSTask* previousTask = self;
+        OSTask* nextTask = previousTask->next;
+
+        while (nextTask != self) {
+            if (nextTask->taskState == kOSProcessStateDead) {
+                OSSpinlockState lockState;
+                OSSpinlockLockIRQ(&sOSSchedulerLock, &lockState);
+                
+                previousTask->next = nextTask->next;
+                
+                OSSpinlockUnlockIRQ(&sOSSchedulerLock, &lockState);
+
+                if (nextTask->kernelStackBase) {
+                    VMHeapFree(nextTask->kernelStackBase);
+                }
+                VMHeapFree(nextTask);
+
+                nextTask = previousTask->next;
+            } else {
+                previousTask = nextTask;
+                nextTask = nextTask->next;
+            }
+        }
+
+        OSSchedulerYield(200);
+    }
+}
+
+static void sOSSchedulerPostGarbageCollectorSignal() {
+    if (!sOSSchedulerGarbageCollectorTask) return;
+
+    OSSpinlockState state;
+    OSSpinlockLockIRQ(&sOSSchedulerLock, &state);
+
+    sOSSchedulerGarbageCollectorTask->taskState = kOSProcessStateRunning;
+    sOSSchedulerGarbageCollectorTask->sleepTicks = 0;
+
+    OSSpinlockUnlockIRQ(&sOSSchedulerLock, &state);
+}
+
+void OSSchedulerInitialize() {
+    sOSSchedulerKernelProcess.processId = 0;
+    sOSSchedulerKernelProcess.state = kOSProcessStateRunning;
+    sOSSchedulerKernelProcess.physicalPML4 = gVMKernelPML4Physical;
+    StringCopy(sOSSchedulerKernelProcess.name, "kernel");
+
+    OSTask* kernelTask = (OSTask*)VMHeapAllocate(sizeof(OSTask));
+    if (!kernelTask) OSPanic("Failed to initialize scheduler: OOm");
+
+    MemorySet(kernelTask, 0, sizeof(OSTask));
+
+    kernelTask->id = 0;
+    kernelTask->process = &sOSSchedulerKernelProcess;
+    kernelTask->sleepTicks = 0;
+    kernelTask->next = kernelTask;
+    kernelTask->taskState = kOSProcessStateRunning;
+    kernelTask->waitingForProcess = -1;
+
+    gOSSchedulerCurrentTask = kernelTask;
+    OSSchedulerSpawn(idle_task, &sOSSchedulerKernelProcess, false, 0);
+    sOSSchedulerGarbageCollectorTask = OSSchedulerSpawn(OSSchedulerGarbageCollector, &sOSSchedulerKernelProcess, false, 0);
+    return;
+}
+
+OSTask* OSSchedulerSpawn(void(*entry)(), OSProcess* owner, Boolean isUser, UInt64 fixedUserStackPointer) {
+    OSTask* task = (OSTask*)VMHeapAllocate(sizeof(OSTask));
+    if (!task) return nullptr;
+    if (!owner) owner = &sOSSchedulerKernelProcess;
+
+    UInt64 stackSize = 16384;
+    UInt8* stackBaseAddress = (UInt8*)VMHeapAllocate(stackSize);
+    if (!stackBaseAddress) {
+        sOSSchedulerPostGarbageCollectorSignal();
+        OSSchedulerYield(0);
+        stackBaseAddress = (UInt8*)VMHeapAllocate(stackSize);
+        if (!stackBaseAddress) {
+            VMHeapFree(task);
+            return nullptr;
+        }
+    }
+    UInt64* rsp = (UInt64*)(stackBaseAddress + stackSize); 
+
+    UInt64 cs = isUser ? 0x23 : 0x08;
+    UInt64 ss = isUser ? 0x1b : 0x10;
+    UInt64 rflags = 0x202;
+    UInt64 targetStackPointer = 0;
+    if (isUser) targetStackPointer = fixedUserStackPointer;
+    else targetStackPointer = (UInt64)stackBaseAddress + stackSize;
+
+    *--rsp = ss; // SS -- Kernel data
+    *--rsp = targetStackPointer; // rsp
+    *--rsp = rflags; // RFLAGS -- Interrupts Enabled | Reserved bit;
+    *--rsp = cs; // CS -- Kernel Code;
+    *--rsp = (UInt64)entry; // RIP
+
+    *--rsp = 0; // int no
+    *--rsp = 0; // err code
+
+    for (UInt8 i = 0; i < 15; i++) *--rsp = 0; // R15 .. RAX
+
+    task->stackPointer = (UInt64)rsp;
+    task->process = owner;
+    task->id = owner->processId;
+    task->sleepTicks = 0;
+    task->kernelStackTop = (UInt64)stackBaseAddress + stackSize;
+    task->kernelStackBase = stackBaseAddress;
+    task->taskState = kOSProcessStateRunning;
+    task->waitingForProcess = -1;
+
+    OSSpinlockState state;
+    OSSpinlockLockIRQ(&sOSSchedulerLock, &state);
+
+    task->next = gOSSchedulerCurrentTask->next;
+    gOSSchedulerCurrentTask->next = task;
+
+    OSSpinlockUnlockIRQ(&sOSSchedulerLock, &state);
+
+    return task;
+}
+
+UInt64 OSSchedulerNext(UInt64 currentStackPointer) {
+    if (!gOSSchedulerCurrentTask) return currentStackPointer;
+
+    OSSpinlockLock(&sOSSchedulerLock);
+
+    gOSSchedulerCurrentTask->stackPointer = currentStackPointer;
+    OSTask* taskIterator = gOSSchedulerCurrentTask->next;
+
+    do {
+        if (taskIterator->sleepTicks > 0) taskIterator->sleepTicks--;
+        taskIterator = taskIterator->next;
+    } while (taskIterator != gOSSchedulerCurrentTask->next);
+
+    if (gOSSchedulerCurrentTask->sleepTicks > 0) gOSSchedulerCurrentTask->sleepTicks--;
+
+    OSTask* nextTask = gOSSchedulerCurrentTask->next;
+    while (1) {
+        if (nextTask->taskState == kOSProcessStateSleeping && nextTask->sleepTicks == 0) nextTask->taskState = kOSProcessStateRunning;
+        if (nextTask->taskState == kOSProcessStateRunning) break;
+        nextTask = nextTask->next;
+
+        if (nextTask == gOSSchedulerCurrentTask) {
+            if (gOSSchedulerCurrentTask->taskState == kOSProcessStateRunning) break;
+            OSPanic("no running tasks");
+        }
+    }
+
+    if (nextTask->process->physicalPML4 != gOSSchedulerCurrentTask->process->physicalPML4) VMLoadCR3(nextTask->process->physicalPML4);
+    gOSSchedulerCurrentTask = nextTask;
+    gHALTaskStateSegment.rsp0 = gOSSchedulerCurrentTask->kernelStackTop;
+    gOSBootCPU.kernelStackPointer = gOSSchedulerCurrentTask->kernelStackTop;
+
+    OSSpinlockUnlock(&sOSSchedulerLock);
+    return gOSSchedulerCurrentTask->stackPointer;
+}
+
+void OSSchedulerBlock(UInt32 processID) {
+    gOSSchedulerCurrentTask->taskState = kOSProcessStateBlocked;
+    gOSSchedulerCurrentTask->waitingForProcess = processID;
+    __asm__ volatile("int $32");
+}
+
+void OSSchedulerWakeup(UInt32 processID) {
+    OSSpinlockState state;
+    OSSpinlockLockIRQ(&sOSSchedulerLock, &state);
+
+    OSTask* iteratorTask = gOSSchedulerCurrentTask;
+    do {
+        if (iteratorTask->taskState == kOSProcessStateBlocked && iteratorTask->waitingForProcess == (Int32)processID) {
+            iteratorTask->taskState = kOSProcessStateRunning;
+            iteratorTask->waitingForProcess = -1;
+        }
+        iteratorTask = iteratorTask->next;
+    } while (iteratorTask != gOSSchedulerCurrentTask);
+
+    OSSpinlockUnlockIRQ(&sOSSchedulerLock, &state);
+}
+
+
+void OSSchedulerTerminate() {
+    UInt32 processID = gOSSchedulerCurrentTask->id;
+    gOSSchedulerCurrentTask->taskState = kOSProcessStateDead;
+
+    OSSchedulerWakeup(processID);
+    sOSSchedulerPostGarbageCollectorSignal();
+    __asm__ volatile("int $32");
+}
+
+void OSSchedulerYield(UInt64 ticks) {
+    gOSSchedulerCurrentTask->sleepTicks = ticks;
+    gOSSchedulerCurrentTask->taskState = kOSProcessStateSleeping;
+    __asm__ volatile("int $32");
+}

kernel/src/OS/OSSpinlock.c

@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#include <OS/OSSpinlock.h>
+
+void OSSpinlockLock(OSSpinlock* lock) {
+    while (__atomic_exchange_n(&lock->lockValue, 1, __ATOMIC_ACQUIRE)) {
+        while (lock->lockValue) {
+            __builtin_ia32_pause();
+        }
+    }
+}
+
+void OSSpinlockUnlock(OSSpinlock *lock) {
+    __atomic_store_n(&lock->lockValue, 0, __ATOMIC_RELEASE);
+}
+
+void OSSpinlockLockIRQ(OSSpinlock *lock, OSSpinlockState *state) {
+    UInt64 rflags;
+    __asm__ volatile("pushfq; pop %0; cli" : "=r"(rflags) :: "memory"); // read flags and cli
+    state->interruptsEnabled = (rflags & (1 << 9)) != 0; // IF bit
+    
+    OSSpinlockLock(lock);
+}
+
+void OSSpinlockUnlockIRQ(OSSpinlock *lock, OSSpinlockState *state) {
+    OSSpinlockUnlock(lock);
+    if (state->interruptsEnabled) __asm__ volatile("sti" ::: "memory");
+}

kernel/src/OS/Services/OSServiceIO.c

@@ -0,0 +1,28 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#include <OS/Services/OSServiceIO.h>
+#include <IO/IOConsole.h>
+#include <IO/IOKeyboard.h>
+
+UInt64 OSServiceIOWrite(UInt64 fileDescriptor, UInt64 buffer, UInt64 length) {
+    if (fileDescriptor == 1 || fileDescriptor == 2) {
+        char* string = (char*)buffer;
+        for (UInt64 i = 0; i < length; i++) {
+            IOConsolePutcharacter(string[i]);
+        }
+        return length;
+    }
+    return 0;
+}
+
+UInt64 OSServiceIORead(UInt64 fileDescriptor, UInt64 buffer, UInt64 count) {
+    char* readBuffer = (char*)buffer;
+    if (fileDescriptor == 0) {
+        for (UInt64 i = 0; i < count; i++) {
+            readBuffer[i] = IOKeyboardGetCharacter();
+        }
+        return count;
+    }
+    return 0;
+}

kernel/src/OS/Services/OSServiceMemory.c

@@ -0,0 +1,30 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#include <OS/Services/OSServiceMemory.h>
+
+#include <OS/OSScheduler.h>
+
+#include <VM/PMM.h>
+#include <VM/VMM.h>
+#include <lib/String.h>
+
+UInt64 OSServiceMemoryAllocate(UInt64 size) {
+    if (size == 0) return 0;
+    OSProcess* currentProcess = gOSSchedulerCurrentTask->process;
+    UInt64 addressToReturn = currentProcess->heapCurrentPointer;
+
+    UInt64 pages_needed = (size + (kVMPageSize-1)) / kVMPageSize;
+
+    for (UInt64 i = 0; i < pages_needed; i++) {
+        void* phycialAddress = VMPhysicalMemoryAllocatePage();
+        if (!phycialAddress) return 0;
+
+        VMVirtualMemoryMapPage((UInt64*)currentProcess->physicalPML4, (UInt64)phycialAddress, currentProcess->heapCurrentPointer, PTE_PRESENT | PTE_RW | PTE_USER);
+        MemorySet((void*)PHYS_TO_HHDM((UInt64)phycialAddress), 0, kVMPageSize);
+
+        currentProcess->heapCurrentPointer += kVMPageSize;
+    }
+
+    return addressToReturn;
+}

kernel/src/OS/Services/OSServiceProcess.c

@@ -0,0 +1,24 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#include <OS/Services/OSServiceProcess.h>
+#include <OS/OSScheduler.h>
+#include <OS/OSPanic.h>
+#include <OS/Exec/OSLoader.h>
+#include <IO/IOConsole.h>
+
+Int32 OSServiceProcessExit(Int32 code) {
+    IOConsoleLog("\n[Dewar] process \"%s\" exited with code %d\n", gOSSchedulerCurrentTask->process->name, code);
+    OSSchedulerTerminate();
+    return code;
+}
+
+
+Int32 OSServiceProcessSpawn(const char* path) {
+    return OSLoaderProcessSpawn(path, path);
+}
+
+Int32 OSServiceProcessWait(UInt64 processID) {
+    OSSchedulerBlock(processID);
+    return processID;
+}

kernel/src/VM/Heap.c

@@ -0,0 +1,131 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#include <VM/Heap.h>
+#include <VM/PMM.h>
+#include <VM/VMM.h>
+#include <lib/String.h>
+#include <OS/OSPanic.h>
+#include <OS/OSSpinlock.h>
+#include <types.h>
+
+extern UInt64* gVMKernelPML4;
+static VMHeapBlockHeader* sVMHeapListHead = nullptr;
+static OSSpinlock sVMHeapLock = {0};
+
+static void sVMHeapCombineForward(VMHeapBlockHeader* current) {
+    if (!current->next || !current->next->isFree) return;
+    current->size += sizeof(VMHeapBlockHeader) + current->next->size;
+    current->next = current->next->next;
+    if (current->next) current->next->previous = current; // what the fuck
+}
+
+void VMHeapInitialize() {
+    UInt64 heapStart = kVMKernelHeapStart;
+
+    for (UInt64 i = 0; i < kVMHeapSizePages; i++) {
+        UInt64 physical = (UInt64)VMPhysicalMemoryAllocatePage();
+        if (!physical) OSPanic("OOM during heap init");
+
+        UInt64 virtual = heapStart + (i * kVMPageSize);
+        VMVirtualMemoryMapPage(gVMKernelPML4, physical, virtual, PTE_PRESENT | PTE_RW);
+    }
+
+    sVMHeapListHead = (VMHeapBlockHeader*)heapStart;
+    sVMHeapListHead->magic = kVMHeapBlockHeaderMagic;
+    sVMHeapListHead->size = (kVMHeapSizePages * kVMPageSize) - sizeof(VMHeapBlockHeader);
+    sVMHeapListHead->isFree = true;
+    sVMHeapListHead->next = nullptr;
+    sVMHeapListHead->previous = nullptr;
+}
+
+static void* sVMHeapAllocateInternal(UInt64 size) {
+    if (size == 0) return nullptr;
+    UInt64 alignedSize = (size + 15) & ~15;
+
+    VMHeapBlockHeader* current = sVMHeapListHead;
+    while (current) {
+        if (current->isFree && current->size >= alignedSize) {
+            if (current->size > alignedSize + sizeof(VMHeapBlockHeader) + 16) {
+                VMHeapBlockHeader* new_block = (VMHeapBlockHeader*)((UInt64)current + sizeof(VMHeapBlockHeader) + alignedSize);
+                new_block->size = current->size - alignedSize - sizeof(VMHeapBlockHeader);
+                new_block->isFree = true;
+                new_block->next = current->next;
+                new_block->previous = current;
+                new_block->magic = kVMHeapBlockHeaderMagic;
+                
+                if (current->next) current->next->previous = new_block;
+                current->next = new_block;
+                current->size = alignedSize;
+            }
+            current->isFree = false;
+            return (void*)((UInt64)current + sizeof(VMHeapBlockHeader));
+        }
+        current = current->next;
+    }
+
+    return nullptr;
+}
+
+static void sVMHeapFreeInternal(void* pointer) {
+    if (!pointer) return;
+
+    VMHeapBlockHeader* current = (VMHeapBlockHeader*)((UInt64)pointer - sizeof(VMHeapBlockHeader));
+    if (current->magic != kVMHeapBlockHeaderMagic) return;
+    
+    current->isFree = true;
+    if (current->next && current->next->isFree) sVMHeapCombineForward(current);
+    if (current->previous && current->previous->isFree) sVMHeapCombineForward(current->previous);
+}
+
+void* VMHeapAllocate(UInt64 size) {
+    OSSpinlockState state;
+    OSSpinlockLockIRQ(&sVMHeapLock, &state);
+    
+    void* result = sVMHeapAllocateInternal(size);
+    
+    OSSpinlockUnlockIRQ(&sVMHeapLock, &state);
+    return result;
+}
+
+void VMHeapFree(void* pointer) {
+    OSSpinlockState state;
+    OSSpinlockLockIRQ(&sVMHeapLock, &state);
+    
+    sVMHeapFreeInternal(pointer);
+    
+    OSSpinlockUnlockIRQ(&sVMHeapLock, &state);
+}
+
+void* VMHeapResize(void* pointer, UInt64 newSize) {
+    if (!pointer) return VMHeapAllocate(newSize);
+    if (newSize == 0) { 
+        VMHeapFree(pointer); 
+        return nullptr; 
+    }
+
+    OSSpinlockState state;
+    OSSpinlockLockIRQ(&sVMHeapLock, &state);
+
+    VMHeapBlockHeader* current = (VMHeapBlockHeader*)((UInt64)pointer - sizeof(VMHeapBlockHeader));
+    if (current->size >= newSize) { 
+        OSSpinlockUnlockIRQ(&sVMHeapLock, &state);
+        return pointer;
+    }
+
+    if (current->next && current->next->isFree &&
+        (current->size + sizeof(VMHeapBlockHeader) + current->next->size) >= newSize) { // why ts so fucking unreadable
+            sVMHeapCombineForward(current);
+            OSSpinlockUnlockIRQ(&sVMHeapLock, &state);
+            return pointer;
+    }
+
+    void* newPointer = sVMHeapAllocateInternal(newSize);
+    if (newPointer) {
+        MemoryCopy(newPointer, pointer, current->size);
+        sVMHeapFreeInternal(pointer);
+    }
+
+    OSSpinlockUnlockIRQ(&sVMHeapLock, &state);
+    return newPointer;
+}

kernel/src/VM/PMM.c

@@ -0,0 +1,131 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#include <VM/PMM.h>
+#include <VM/VMM.h>
+#include <lib/String.h>
+#include <lib/Math.h>
+
+#include <OS/OSPanic.h>
+#include <OS/OSSpinlock.h>
+
+#include <types.h>
+
+#include "bootinfo.h"
+
+
+UInt8*  gVMPhycalMemoryBitmap = nullptr;
+UInt64  gVMPhycalMemoryBitmapSize = 0;
+UInt64  gVMPhycalMemoryTotalMemorySize = 0;
+
+static OSSpinlock sVMPMMLock = {0};
+
+extern UInt64 _kernel_start; 
+extern UInt64 _kernel_end;
+
+UInt64 VMPhysicalMemoryGetTotalMemorySize() {
+    return gVMPhycalMemoryTotalMemorySize;
+}
+
+void VMPhysicalMemoryInitialize(BIMemoryMap *memoryMap) {
+    UInt64 descriptorCount = memoryMap->mapSize / memoryMap->descriptorSize;
+    UInt64 maxPhysicalAddress = 0;
+
+    for (UInt64 i = 0; i < descriptorCount; i++) {
+        OSMemoryDescriptor* descriptor = (OSMemoryDescriptor*)((UInt8*)memoryMap->map + (i * memoryMap->descriptorSize));
+        
+        if (descriptor->type == kOSMemoryTypeMappedIO || 
+            descriptor->type == kOSMemoryTypeMappedIOPortSpace || 
+            descriptor->type == kOSMemoryTypeUnusable || 
+            descriptor->type == kOSMemoryTypeReserved || 
+            descriptor->type == kOSMemoryTypePalCode) {
+            continue;
+        }
+
+        UInt64 nominee = descriptor->physicalStart + (descriptor->pageCount * kVMPageSize);
+        if (nominee > maxPhysicalAddress) {
+            maxPhysicalAddress = nominee;
+        }
+    }
+    gVMPhycalMemoryTotalMemorySize = maxPhysicalAddress;
+
+    UInt64 totalPageCount = maxPhysicalAddress / kVMPageSize;
+    UInt64 bitmapSize = (totalPageCount + 7) / 8;
+    OSMemoryDescriptor *bitmapHostDescriptor = nullptr;
+
+    for (UInt64 i = 0; i < descriptorCount; i++) {
+        OSMemoryDescriptor *descriptor = (OSMemoryDescriptor*)((UInt8*)memoryMap->map + (i * memoryMap->descriptorSize));
+        
+        if ((descriptor->type == kOSMemoryTypeConventional) && 
+            ((descriptor->pageCount * kVMPageSize) >= bitmapSize) && 
+            (descriptor->physicalStart >= kVMSafeSpaceStartAddress)) { 
+                bitmapHostDescriptor = descriptor;
+                break;
+        }
+    }
+
+    if (bitmapHostDescriptor == nullptr) {
+        OSPanic("PMM: Not enough RAM for memory bitmap!");
+    }
+
+    gVMPhycalMemoryBitmap = (UInt8*)bitmapHostDescriptor->physicalStart;
+    gVMPhycalMemoryBitmapSize = bitmapSize; 
+
+    MemorySet(gVMPhycalMemoryBitmap, 0xFF, bitmapSize);
+
+    for (UInt64 i = 0; i < descriptorCount; i++) {
+        OSMemoryDescriptor *descriptor = (OSMemoryDescriptor*)((UInt8*)memoryMap->map + (i * memoryMap->descriptorSize));
+        
+        if (descriptor->type != kOSMemoryTypeConventional) {
+            continue;
+        }
+        
+        UInt64 startAddress = descriptor->physicalStart;
+        UInt64 endAddress = startAddress + (descriptor->pageCount * kVMPageSize);
+        
+        for (UInt64 addr = startAddress; addr < endAddress; addr += kVMPageSize) {
+            BITMAP_UNSET(gVMPhycalMemoryBitmap, addr);
+        }
+    }
+    
+    UInt64 kernelStart = KERNEL_VIRT_TO_PHYS((UInt64)&_kernel_start); 
+    UInt64 kernelEnd   = KERNEL_VIRT_TO_PHYS((UInt64)&_kernel_end);
+
+    UInt64 bitmapStart = (UInt64)gVMPhycalMemoryBitmap;
+    UInt64 bitmapEnd   = bitmapStart + gVMPhycalMemoryBitmapSize;
+
+    for (UInt64 addr = 0; addr < kVMSafeSpaceStartAddress; addr += kVMPageSize) BITMAP_SET(gVMPhycalMemoryBitmap, addr);
+    for (UInt64 addr = kernelStart; addr < kernelEnd; addr += kVMPageSize)     BITMAP_SET(gVMPhycalMemoryBitmap, addr); 
+    for (UInt64 addr = bitmapStart; addr < bitmapEnd; addr += kVMPageSize)     BITMAP_SET(gVMPhycalMemoryBitmap, addr);
+}
+
+void* VMPhysicalMemoryAllocatePage() {
+    OSSpinlockState state;
+    OSSpinlockLockIRQ(&sVMPMMLock, &state);
+
+    for (UInt64 i = 0; i < gVMPhycalMemoryBitmapSize; i++) {
+        if (gVMPhycalMemoryBitmap[i] == 0xFF) continue;
+        
+        for (UInt64 bit = 0; bit < 8; bit++) {
+            if ((gVMPhycalMemoryBitmap[i] & (1 << bit)) == 0) { 
+                UInt64 address = (i * 8 + bit) * kVMPageSize;
+                BITMAP_SET(gVMPhycalMemoryBitmap, address);
+
+                OSSpinlockUnlockIRQ(&sVMPMMLock, &state);
+                return (void*)address;
+            }
+        }
+    }
+
+    OSSpinlockUnlockIRQ(&sVMPMMLock, &state);
+    return nullptr; // Out of memory
+}
+
+void VMPhysicalMemoryFreePage(void* address) {
+    OSSpinlockState state;
+    OSSpinlockLockIRQ(&sVMPMMLock, &state);
+
+    BITMAP_UNSET(gVMPhycalMemoryBitmap, (UInt64)address);
+
+    OSSpinlockUnlockIRQ(&sVMPMMLock, &state);
+}

kernel/src/VM/VMM.c

@@ -0,0 +1,207 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+#include <VM/VMM.h>
+#include <VM/PMM.h>
+
+#include <OS/OSPanic.h>
+#include <OS/OSSpinlock.h>
+
+#include <GDT.h>
+#include <IDT.h>
+
+#include <lib/String.h>
+
+#include <types.h>
+#include "bootinfo.h"
+
+enum {
+    kVMUserStackTop = 0x70000000,
+    kVMUserStackSize = 0x4000
+};
+
+UInt64* gVMKernelPML4 = nullptr;
+UInt64 gVMKernelPML4Physical = 0;
+static OSSpinlock sVMVMMlock = {0};
+static bool isInitialized = false;
+
+extern UInt64 _kernel_start; 
+extern UInt64 _kernel_end;
+extern UInt8* gVMPhycalMemoryBitmap;
+extern UInt64 gVMPhycalMemoryBitmapSize;
+extern HALGlobalDescriptorTable gHALGlobalDescriptorTable[];
+extern HALInterruptsDescriptorTableEntry gHALInterruptsDescriptorTable[];
+extern UInt8 gHALDoubleFaultStack[];
+extern UInt8 stack_guard;
+
+static UInt64* sVMGetVirtualTable(UInt64 phys) {
+    if (isInitialized) return (UInt64*)PHYS_TO_HHDM(phys);
+    return (UInt64*)phys;
+}
+
+static UInt64* sVMVirtualMemoryMapPageInternal(UInt64* pml4, UInt64 phys, UInt64 virt, UInt64 flags) {
+    UInt64 pt_idx = VMM_PT_INDEX(virt);
+    UInt64 pd_idx = VMM_PD_INDEX(virt);
+    UInt64 pdpt_idx = VMM_PDPT_INDEX(virt);
+    UInt64 pml4_idx = VMM_PML4_INDEX(virt);
+
+    UInt64* pml4_virt = pml4;
+    if (isInitialized) pml4_virt = (UInt64*)PHYS_TO_HHDM((UInt64)pml4);
+
+    UInt64 table_flags = PTE_PRESENT | PTE_RW | (flags & PTE_USER);
+
+    if (!(pml4_virt[pml4_idx] & PTE_PRESENT)) {
+        UInt64* addr = VMPhysicalMemoryAllocatePage();
+        if (!addr) return nullptr;
+        UInt64* addr_virt = sVMGetVirtualTable((UInt64)addr);
+        MemorySet(addr_virt, 0, kVMPageSize);
+        pml4_virt[pml4_idx] = (UInt64)addr | table_flags; 
+    } else {
+        pml4_virt[pml4_idx] |= (flags & PTE_USER);
+    }
+
+    UInt64* pdpt = (UInt64*)PTE_GET_ADDR(pml4_virt[pml4_idx]);
+    UInt64* pdpt_virt = sVMGetVirtualTable((UInt64)pdpt);
+
+    if (!(pdpt_virt[pdpt_idx] & PTE_PRESENT)) {
+        UInt64* addr = VMPhysicalMemoryAllocatePage();
+        if (!addr) return nullptr;
+        UInt64* addr_virt = sVMGetVirtualTable((UInt64)addr);
+        MemorySet(addr_virt, 0, kVMPageSize);
+        pdpt_virt[pdpt_idx] = (UInt64)addr | table_flags;
+    } else {
+        pdpt_virt[pdpt_idx] |= (flags & PTE_USER);
+    }
+
+    UInt64* pd = (UInt64*)PTE_GET_ADDR(pdpt_virt[pdpt_idx]);
+    UInt64* pd_virt = sVMGetVirtualTable((UInt64)pd);
+
+    if (!(pd_virt[pd_idx] & PTE_PRESENT)) {
+        UInt64* addr = VMPhysicalMemoryAllocatePage();
+        if (!addr) return nullptr;
+        UInt64* addr_virt = sVMGetVirtualTable((UInt64)addr);
+        MemorySet(addr_virt, 0, kVMPageSize);
+        pd_virt[pd_idx] = (UInt64)addr | table_flags;
+    } else {
+        pd_virt[pd_idx] |= (flags & PTE_USER);
+    }
+
+    UInt64* pt = (UInt64*)PTE_GET_ADDR(pd_virt[pd_idx]);
+    UInt64* pt_virt = sVMGetVirtualTable((UInt64)pt);
+    pt_virt[pt_idx] = phys | flags;
+
+    __asm__ volatile("invlpg (%0)" :: "r" (virt) : "memory");
+    
+    return (UInt64*)virt;
+}
+
+static void sVMVirtualMemoryUnmapPageInternal(UInt64* pml4, UInt64 virt) {
+    UInt64 pt_idx = VMM_PT_INDEX(virt);
+    UInt64 pd_idx = VMM_PD_INDEX(virt);
+    UInt64 pdpt_idx = VMM_PDPT_INDEX(virt);
+    UInt64 pml4_idx = VMM_PML4_INDEX(virt);
+
+    UInt64* pml4_virt = pml4;
+    if (isInitialized) pml4_virt = (UInt64*)PHYS_TO_HHDM((UInt64)pml4);
+
+    if (!(pml4_virt[pml4_idx] & PTE_PRESENT)) return;
+    UInt64* pdpt_virt = sVMGetVirtualTable(PTE_GET_ADDR(pml4_virt[pml4_idx]));
+    
+    if (!(pdpt_virt[pdpt_idx] & PTE_PRESENT)) return;
+    UInt64* pd_virt = sVMGetVirtualTable(PTE_GET_ADDR(pdpt_virt[pdpt_idx]));
+    
+    if (!(pd_virt[pd_idx] & PTE_PRESENT)) return;
+    UInt64* pt_virt = sVMGetVirtualTable(PTE_GET_ADDR(pd_virt[pd_idx]));
+
+    pt_virt[pt_idx] = 0; 
+    
+    __asm__ volatile("invlpg (%0)" :: "r" (virt) : "memory");
+}
+
+
+UInt64* VMVirtualMemoryMapPage(UInt64* pml4, UInt64 phys, UInt64 virt, UInt64 flags) {
+    OSSpinlockState state;
+    OSSpinlockLockIRQ(&sVMVMMlock, &state);
+
+    UInt64* result = sVMVirtualMemoryMapPageInternal(pml4, phys, virt, flags);
+
+    OSSpinlockUnlockIRQ(&sVMVMMlock, &state);
+    return result;
+}
+
+void VMVirtualMemoryUnmapPage(UInt64* pml4, UInt64 virt) {
+    OSSpinlockState state;
+    OSSpinlockLockIRQ(&sVMVMMlock, &state);
+
+    sVMVirtualMemoryUnmapPageInternal(pml4, virt);
+
+    OSSpinlockUnlockIRQ(&sVMVMMlock, &state);
+}
+
+
+void VMLoadCR3(UInt64 pml4_addr) {
+    __asm__ volatile ("mov %0, %%cr3" :: "r"(pml4_addr) : "memory");
+}
+
+void VMVirtualMemoryInitialize(Bootinfo* info) {
+    gVMKernelPML4Physical = (UInt64)VMPhysicalMemoryAllocatePage();
+    gVMKernelPML4 = (UInt64*)gVMKernelPML4Physical;
+    MemorySet(gVMKernelPML4, 0, kVMPageSize);
+
+    UInt64 k_virt_start = (UInt64)&_kernel_start; 
+    UInt64 k_virt_end   = (UInt64)&_kernel_end;
+
+    UInt64 fb_start = (UInt64)info->framebuffer.base;
+    UInt64 fb_end   = fb_start + info->framebuffer.baseSize;
+    UInt64 fb_size = fb_end - fb_start;
+
+    UInt64 max_mem = VMPhysicalMemoryGetTotalMemorySize();
+    for (UInt64 i = 0; i < max_mem; i += kVMPageSize)               VMVirtualMemoryMapPage(gVMKernelPML4, i, PHYS_TO_HHDM(i), PTE_PRESENT | PTE_RW);
+    for (UInt64 i = k_virt_start; i < k_virt_end; i += kVMPageSize) VMVirtualMemoryMapPage(gVMKernelPML4, KERNEL_VIRT_TO_PHYS(i), i, PTE_PRESENT | PTE_RW);
+    for (UInt64 i = 0; i < fb_size; i += kVMPageSize)         VMVirtualMemoryMapPage(gVMKernelPML4, fb_start + i, FB_VIRT_BASE + i, PTE_PRESENT | PTE_RW);
+    VMVirtualMemoryUnmapPage(gVMKernelPML4, (UInt64)&stack_guard);
+
+    gVMPhycalMemoryBitmap = (UInt8*)PHYS_TO_HHDM((UInt64)gVMPhycalMemoryBitmap);
+    info->framebuffer.base = (UInt32*)FB_VIRT_BASE;
+    VMLoadCR3(gVMKernelPML4Physical);
+    isInitialized = true;
+}
+
+UInt64 VMVirtualMemoryCreateAddressSpace() {
+    OSSpinlockState state;
+    OSSpinlockLockIRQ(&sVMVMMlock, &state);
+    
+    UInt64 phys = (UInt64)VMPhysicalMemoryAllocatePage();
+    if (!phys) {
+        OSSpinlockUnlockIRQ(&sVMVMMlock, &state);
+        return 0;
+    };
+
+    UInt64* virt = (UInt64*)PHYS_TO_HHDM(phys);
+    MemorySet(virt, 0, kVMPageSize);
+
+    UInt64* kernel_pml4_virt = sVMGetVirtualTable((UInt64)gVMKernelPML4);
+
+    for (UInt32 i = 256; i < 512; i++) {
+        virt[i] = kernel_pml4_virt[i];
+    }
+
+    OSSpinlockUnlockIRQ(&sVMVMMlock, &state);
+    return phys;
+}
+
+UInt64 VMGetCurrentCR3() {
+    UInt64 cr3;
+    __asm__ volatile("mov %%cr3, %0" : "=r"(cr3));
+    return cr3;
+}
+
+
+void VMVirtualMemorySetupUserStack(UInt64* pml4_phys) {
+    UInt64 stack_bottom = kVMUserStackTop - kVMUserStackSize;
+    for (UInt64 addr = stack_bottom; addr < kVMUserStackTop; addr += 4096) {
+        void* phys = VMPhysicalMemoryAllocatePage();
+        if (!phys) OSPanic("OOM in user stack setup");
+        MemorySet((void*)PHYS_TO_HHDM((UInt64)phys), 0, 4096);
+        VMVirtualMemoryMapPage((UInt64*)pml4_phys, (UInt64)phys, addr, PTE_PRESENT | PTE_RW | PTE_USER);
+    }
+}

kernel/src/arch/x86_64/GDT.c

@@ -0,0 +1,77 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+// just fucking kill me already
+
+#include <GDT.h>
+
+HALGlobalDescriptorTable gHALGlobalDescriptorTable[kHALGDTEntries];
+HALGlobalDescriptorTablePointer gHALGlobalDescriptorTablePointer;
+HALTaskStateSegment gHALTaskStateSegment;
+UInt8 gHALDoubleFaultStack[4096] = {0};
+
+static void sHALGlobalDescriptorTableSetGate(int number, UInt64 base, UInt64 limit, UInt8 access, UInt8 granularity) {
+    gHALGlobalDescriptorTable[number].baseLow = (base & 0xFFFF); // left only low 16bit
+    gHALGlobalDescriptorTable[number].baseMiddle = (base >> 16) & 0xFF; // 3rd address byte
+    gHALGlobalDescriptorTable[number].baseHigh = (base >> 24) & 0xFF; // 4th address byte
+
+    gHALGlobalDescriptorTable[number].limitLow = (limit & 0xFFFF);
+    gHALGlobalDescriptorTable[number].granularity = (limit >> 16) & 0x0F; // leave only first 4 bits (limit's left 16-19)
+    gHALGlobalDescriptorTable[number].granularity |= granularity & 0xF0; // get flags and concate two pieces so FFFFLLLL (L -- Limit; F -- flags)
+    gHALGlobalDescriptorTable[number].access = access;
+
+    // fuck intel
+}
+
+
+static void sHALTaskStateSegmentWrite(int number) {
+    UInt64 base = (UInt64)&gHALTaskStateSegment;
+    UInt64 limit = sizeof(gHALTaskStateSegment);
+    UInt64 access = 0x89; // TSS_PRESENT | TSS_EXECUTABLE | TSS_ACCESSED;
+    UInt64 granularity = 0;
+
+    sHALGlobalDescriptorTableSetGate(number, base, limit, access, granularity);
+     *((UInt64*)&gHALGlobalDescriptorTable[number+1]) = (base >> 32);   // really scary but not really hard
+                                            // just direct write 8bytes to num+1
+                                            // basically a hack but at this point i dont care
+}
+
+
+extern void gdt_flush(UInt64 gdt_ptr_addr); // entry.asm
+
+void HALGlobalDescriptorTableInitialize() {
+    gHALGlobalDescriptorTablePointer.limit = (sizeof(HALGlobalDescriptorTable) * kHALGDTEntries) - 1;
+    gHALGlobalDescriptorTablePointer.base = (UInt64)&gHALGlobalDescriptorTable;
+
+    // 0: Null
+    sHALGlobalDescriptorTableSetGate(0, 0, 0, 0, 0);
+
+    // 1: Kernel Code (Ring 0)
+    // Access: 0x9A (Present, Ring0, Exec/Read)
+    // Granularity: 0x20 (Long Mode bit)                    access  ring 0    code  exec    code    readable
+    sHALGlobalDescriptorTableSetGate(1, 0, 0, 0x9A, 0x20);              //  0x9A = 1    00          1   1       0       1
+                                                    //  0x20 = 0010 0000 bit 5 is "Long mode"
+    // 2: Kernel Data (Ring 0)
+    // Access: 0x92 (Present, Ring0, Read/Write)
+    sHALGlobalDescriptorTableSetGate(2, 0, 0, 0x92, 0);                 //  0x92 = 1    00          1   0       0       1
+
+    // 3: User Data (Ring 3)
+    // Access: 0xF2 (Present, Ring3, Read/Write)
+    sHALGlobalDescriptorTableSetGate(3, 0, 0, 0xF2, 0);                 //  0xF2 = 1    11          1   0       0       1
+
+    // 4: User Code (Ring 3)
+    // Access: 0xFA (Present, Ring3, RWX)
+    sHALGlobalDescriptorTableSetGate(4, 0, 0, 0xFA, 0x20);              //  0xFA = 1    11          1   1       0       1
+
+    for (UInt64 i = 0; i < sizeof(HALTaskStateSegment); i++) ((UInt8*)&gHALTaskStateSegment)[i] = 0; // zeroifying tss struct
+
+    gHALTaskStateSegment.iomapBase = sizeof(HALTaskStateSegment);
+    gHALTaskStateSegment.ist1 = (UInt64)gHALDoubleFaultStack + sizeof(gHALDoubleFaultStack);
+    sHALTaskStateSegmentWrite(5);
+
+    gdt_flush((UInt64)&gHALGlobalDescriptorTablePointer);
+
+    // telling cpu that TSS info located at gdt[5]; offset = 5 * 8 = 40 = 0x28
+    __asm__ volatile ("ltr %%ax" :: "a" (0x28));
+}
+

kernel/src/arch/x86_64/IDT.c

@@ -0,0 +1,82 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#include <IDT.h>
+#include <types.h>
+
+HALInterruptsDescriptorTableEntry gHALInterruptsDescriptorTable[256];
+HALInterruptsDescriptorTablePointer gHALInterruptsDescriptorTablePointer;
+
+extern void isr0(); extern void isr1(); extern void isr2(); extern void isr3();
+extern void isr4(); extern void isr5(); extern void isr6(); extern void isr7();
+extern void isr8(); extern void isr9(); extern void isr10(); extern void isr11();
+extern void isr12(); extern void isr13(); extern void isr14(); extern void isr15();
+extern void isr16(); extern void isr17(); extern void isr18(); extern void isr19();
+extern void isr20(); extern void isr21(); extern void isr22(); extern void isr23();
+extern void isr24(); extern void isr25(); extern void isr26(); extern void isr27();
+extern void isr28(); extern void isr29(); extern void isr30(); extern void isr31();
+extern void irq0(void); extern void irq1(void);
+
+extern void idt_load(UInt64); // asm: lidt [rdi] / ret
+
+static void sHALInterruptsDescriptorTableSetGate(int number, UInt64 handler, UInt16 selector, UInt8 flags) {
+    gHALInterruptsDescriptorTable[number].offsetLow  = handler & 0xFFFF;
+    gHALInterruptsDescriptorTable[number].offsetMid  = (handler >> 16) & 0xFFFF;
+    gHALInterruptsDescriptorTable[number].offsetHigh = (handler >> 32) & 0xFFFFFFFF;
+    
+    gHALInterruptsDescriptorTable[number].selector = selector; // 0x08 (Kernel Code)
+    gHALInterruptsDescriptorTable[number].ist = 0;
+    gHALInterruptsDescriptorTable[number].attributes = flags;
+    gHALInterruptsDescriptorTable[number].reserved = 0;
+}
+
+void HALInterruptsDescriptorTableInitialize() {
+    gHALInterruptsDescriptorTablePointer.limit = (sizeof(HALInterruptsDescriptorTableEntry) * 256) - 1;
+    gHALInterruptsDescriptorTablePointer.base = (UInt64)&gHALInterruptsDescriptorTable;
+
+    const UInt8 flags = 0x8E;
+    const UInt8 selector = 0x08;
+    
+
+    sHALInterruptsDescriptorTableSetGate(0,  (UInt64)isr0,  selector, flags);
+    sHALInterruptsDescriptorTableSetGate(1,  (UInt64)isr1,  selector, flags);
+    sHALInterruptsDescriptorTableSetGate(2,  (UInt64)isr2,  selector, flags);
+    sHALInterruptsDescriptorTableSetGate(3,  (UInt64)isr3,  selector, flags);
+    sHALInterruptsDescriptorTableSetGate(4,  (UInt64)isr4,  selector, flags);
+    sHALInterruptsDescriptorTableSetGate(5,  (UInt64)isr5,  selector, flags);
+    sHALInterruptsDescriptorTableSetGate(6,  (UInt64)isr6,  selector, flags);
+    sHALInterruptsDescriptorTableSetGate(7,  (UInt64)isr7,  selector, flags);
+    sHALInterruptsDescriptorTableSetGate(8,  (UInt64)isr8,  selector, flags);
+    sHALInterruptsDescriptorTableSetGate(9,  (UInt64)isr9,  selector, flags);
+    sHALInterruptsDescriptorTableSetGate(10, (UInt64)isr10, selector, flags);
+    sHALInterruptsDescriptorTableSetGate(11, (UInt64)isr11, selector, flags);
+    sHALInterruptsDescriptorTableSetGate(12, (UInt64)isr12, selector, flags);
+    sHALInterruptsDescriptorTableSetGate(13, (UInt64)isr13, selector, flags); 
+    sHALInterruptsDescriptorTableSetGate(14, (UInt64)isr14, selector, flags); 
+    sHALInterruptsDescriptorTableSetGate(15, (UInt64)isr15, selector, flags);
+    sHALInterruptsDescriptorTableSetGate(16, (UInt64)isr16, selector, flags);
+    sHALInterruptsDescriptorTableSetGate(17, (UInt64)isr17, selector, flags);
+    sHALInterruptsDescriptorTableSetGate(18, (UInt64)isr18, selector, flags);
+    sHALInterruptsDescriptorTableSetGate(19, (UInt64)isr19, selector, flags);
+    sHALInterruptsDescriptorTableSetGate(20, (UInt64)isr20, selector, flags);
+    sHALInterruptsDescriptorTableSetGate(21, (UInt64)isr21, selector, flags);
+    sHALInterruptsDescriptorTableSetGate(22, (UInt64)isr22, selector, flags);
+    sHALInterruptsDescriptorTableSetGate(23, (UInt64)isr23, selector, flags);
+    sHALInterruptsDescriptorTableSetGate(24, (UInt64)isr24, selector, flags);
+    sHALInterruptsDescriptorTableSetGate(25, (UInt64)isr25, selector, flags);
+    sHALInterruptsDescriptorTableSetGate(26, (UInt64)isr26, selector, flags);
+    sHALInterruptsDescriptorTableSetGate(27, (UInt64)isr27, selector, flags);
+    sHALInterruptsDescriptorTableSetGate(28, (UInt64)isr28, selector, flags);
+    sHALInterruptsDescriptorTableSetGate(29, (UInt64)isr29, selector, flags);
+    sHALInterruptsDescriptorTableSetGate(30, (UInt64)isr30, selector, flags);
+    sHALInterruptsDescriptorTableSetGate(31, (UInt64)isr31, selector, flags);
+
+    gHALInterruptsDescriptorTable[8].ist = 1; // TSS
+    gHALInterruptsDescriptorTable[13].ist = 1;
+    gHALInterruptsDescriptorTable[14].ist = 1;
+
+    sHALInterruptsDescriptorTableSetGate(32, (UInt64)irq0, selector, flags);
+    sHALInterruptsDescriptorTableSetGate(33, (UInt64)irq1, selector, flags);
+
+    __asm__ volatile ("lidt %0" : : "m"(gHALInterruptsDescriptorTablePointer));
+}

kernel/src/arch/x86_64/OSCPU.c

@@ -0,0 +1,72 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#include <types.h>
+#include <OSCPU.h>
+
+#define MSR_GS_BASE         0xC0000101
+#define MSR_KERNEL_GS_BASE  0xC0000102
+
+OSCPUData gOSBootCPU = {0};
+
+static inline void CPUID(UInt32 leaf, UInt32 subleaf, UInt32 *eax, UInt32 *ebx, UInt32 *ecx, UInt32 *edx) {
+    __asm__ volatile("cpuid"
+        : "=a"(*eax), "=b"(*ebx), "=c"(*ecx), "=d"(*edx)
+        : "a"(leaf), "c"(subleaf)
+    );
+}
+
+static inline void WRMSR(UInt32 msr, UInt64 val) {
+    UInt32 low = (UInt32)val;
+    UInt32 high = (UInt32)(val >> 32);
+    __asm__ volatile("wrmsr" :: "a"(low), "d"(high), "c"(msr));
+}
+
+void OSCPUInitialize(UInt64 kernelStackTop) {
+    gOSBootCPU.kernelStackPointer = kernelStackTop;
+    gOSBootCPU.selfAddress = (UInt64)&gOSBootCPU;
+    WRMSR(MSR_KERNEL_GS_BASE, (UInt64)&gOSBootCPU);
+
+
+    UInt32 eax, ebx, ecx, edx;
+
+    CPUID(0, 0, &eax, &ebx, &ecx, &edx);
+    
+    UInt32* vendorPointer = (UInt32*)gOSBootCPU.vendorID;
+    vendorPointer[0] = ebx;
+    vendorPointer[1] = edx;
+    vendorPointer[2] = ecx;
+    gOSBootCPU.vendorID[12] = '\0';
+
+    CPUID(1, 0, &eax, &ebx, &ecx, &edx);
+
+    gOSBootCPU.family = (eax >> 8) & 0xF;
+    gOSBootCPU.model  = (eax >> 4) & 0xF;
+    if (gOSBootCPU.family == 6 || gOSBootCPU.family == 15) {
+        gOSBootCPU.model += ((eax >> 16) & 0xF) << 4;
+    }
+
+    if (edx & (1 << 0))  gOSBootCPU.features |= kCPUFeatureFPU;
+    if (edx & (1 << 4))  gOSBootCPU.features |= kCPUFeatureTSC;
+    if (edx & (1 << 5))  gOSBootCPU.features |= kCPUFeatureMSR;
+    if (edx & (1 << 6))  gOSBootCPU.features |= kCPUFeaturePAE;
+    if (edx & (1 << 9))  gOSBootCPU.features |= kCPUFeatureAPIC;
+    if (edx & (1 << 12)) gOSBootCPU.features |= kCPUFeatureMTRR;
+
+    if (edx & (1 << 25)) gOSBootCPU.features |= kCPUFeatureSSE;
+    if (edx & (1 << 26)) gOSBootCPU.features |= kCPUFeatureSSE2;
+    if (ecx & (1 << 0))  gOSBootCPU.features |= kCPUFeatureSSE3;
+    if (ecx & (1 << 9))  gOSBootCPU.features |= kCPUFeatureSSSE3;
+    if (ecx & (1 << 19)) gOSBootCPU.features |= kCPUFeatureSSE4_1;
+    if (ecx & (1 << 20)) gOSBootCPU.features |= kCPUFeatureSSE4_2;
+
+    if (ecx & (1 << 28)) gOSBootCPU.features |= kCPUFeatureAVX;
+    if (ecx & (1 << 29)) gOSBootCPU.features |= kCPUFeatureF16C;
+    if (ecx & (1 << 30)) gOSBootCPU.features |= kCPUFeatureRDRAND;
+    
+    if (ecx & (1 << 31)) gOSBootCPU.features |= kCPUFeatureHypervisor;
+}
+
+Boolean OSCPUHasFeature(OSCPUFeature feature) {
+    return (gOSBootCPU.features & feature) != 0;
+}

kernel/src/arch/x86_64/PIC.c

@@ -0,0 +1,34 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKarinyash
+
+#include <PIC.h>
+#include <IO.h>
+#include <types.h>
+
+
+UInt16 HALLegacyInterruptControllerRemap() {
+    UInt8 currentMaster = IOPortRead8(kIOMasterData);
+    UInt8 currentSlave  = IOPortRead8(kIOSlaveData);
+
+    // initialization; icw1
+    IOPortWrite8WithWait(kIOMasterCommand, 0x11);
+    IOPortWrite8WithWait(kIOSlaveCommand, 0x11);
+
+    // icw2
+    IOPortWrite8WithWait(kIOMasterData, 0x20); // master now controlling idt[32..39]
+    IOPortWrite8WithWait(kIOSlaveData, 0x28); // idt[40..47]
+
+    // icw3
+    IOPortWrite8WithWait(kIOMasterData, 0x04); // slave on irq2
+    IOPortWrite8WithWait(kIOSlaveData, 0x02); // assign id = 2 to slave
+
+    // icw4; 0x01 -- 8086 mode
+    IOPortWrite8WithWait(kIOMasterData, 0x01);
+    IOPortWrite8WithWait(kIOSlaveData, 0x01); 
+
+    IOPortWrite8WithWait(kIOMasterData, 0xFD); // 1111 1101 
+                                  //        0 -- means 'on'
+    IOPortWrite8WithWait(kIOSlaveData, 0xFF); // Everything ON
+
+    return ((UInt16) currentMaster << 8) | currentSlave;
+}

kernel/src/arch/x86_64/cpuinfo.c

@@ -1,72 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2026 0xKarinyash
-
-#include "types.h"
-#include <cpuinfo.h>
-
-#define MSR_GS_BASE         0xC0000101
-#define MSR_KERNEL_GS_BASE  0xC0000102
-
-cpu_info g_cpu = {0};
-
-static inline void cpuid(u32 leaf, u32 subleaf, u32 *eax, u32 *ebx, u32 *ecx, u32 *edx) {
-    __asm__ volatile("cpuid"
-        : "=a"(*eax), "=b"(*ebx), "=c"(*ecx), "=d"(*edx)
-        : "a"(leaf), "c"(subleaf)
-    );
-}
-
-static inline void wrmsr(u32 msr, u64 val) {
-    u32 low = (u32)val;
-    u32 high = (u32)(val >> 32);
-    __asm__ volatile("wrmsr" :: "a"(low), "d"(high), "c"(msr));
-}
-
-void cpuinfo_init(u64 kernel_stack_top) {
-    g_cpu.kernel_rsp = kernel_stack_top;
-    g_cpu.self = (u64)&g_cpu;
-    wrmsr(MSR_KERNEL_GS_BASE, (u64)&g_cpu);
-
-
-    u32 eax, ebx, ecx, edx;
-
-    cpuid(0, 0, &eax, &ebx, &ecx, &edx);
-    
-    u32* vendor_ptr = (u32*)g_cpu.vendor;
-    vendor_ptr[0] = ebx;
-    vendor_ptr[1] = edx;
-    vendor_ptr[2] = ecx;
-    g_cpu.vendor[12] = '\0';
-
-    cpuid(1, 0, &eax, &ebx, &ecx, &edx);
-
-    g_cpu.family = (eax >> 8) & 0xF;
-    g_cpu.model  = (eax >> 4) & 0xF;
-    if (g_cpu.family == 6 || g_cpu.family == 15) {
-        g_cpu.model += ((eax >> 16) & 0xF) << 4;
-    }
-
-    if (edx & (1 << 0))  g_cpu.features |= CPU_FEAT_FPU;
-    if (edx & (1 << 4))  g_cpu.features |= CPU_FEAT_TSC;
-    if (edx & (1 << 5))  g_cpu.features |= CPU_FEAT_MSR;
-    if (edx & (1 << 6))  g_cpu.features |= CPU_FEAT_PAE;
-    if (edx & (1 << 9))  g_cpu.features |= CPU_FEAT_APIC;
-    if (edx & (1 << 12)) g_cpu.features |= CPU_FEAT_MTRR;
-    if (edx & (1 << 25)) g_cpu.features |= CPU_FEAT_SSE;
-    if (edx & (1 << 26)) g_cpu.features |= CPU_FEAT_SSE2;
-
-    if (ecx & (1 << 0))  g_cpu.features |= CPU_FEAT_SSE3;
-    if (ecx & (1 << 9))  g_cpu.features |= CPU_FEAT_SSSE3;
-    if (ecx & (1 << 19)) g_cpu.features |= CPU_FEAT_SSE4_1;
-    if (ecx & (1 << 20)) g_cpu.features |= CPU_FEAT_SSE4_2;
-    if (ecx & (1 << 28)) g_cpu.features |= CPU_FEAT_AVX;
-    if (ecx & (1 << 29)) g_cpu.features |= CPU_FEAT_F16C;
-    
-    if (ecx & (1 << 30)) g_cpu.features |= CPU_FEAT_RDRAND;
-    
-    if (ecx & (1 << 31)) g_cpu.features |= CPU_FEAT_HYPERVISOR;
-}
-
-bool cpu_has(u64 feature) {
-    return (g_cpu.features & feature) != 0;
-}

kernel/src/arch/x86_64/entry.asm

@@ -1,5 +1,5 @@
 ; SPDX-License-Identifier: GPL-3.0-or-later
-; Copyright (c) 2025 0xKarinyash
+; Copyright (c) 2026 0xKarinyash
 
 bits 64
 

kernel/src/arch/x86_64/gdt.c

@@ -1,78 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2025 0xKarinyash
-
-// just fucking kill me already
-
-#include <gdt.h>
-#define GDT_ENTIRES 7
-
-GDTDescriptor gdt[GDT_ENTIRES];
-GDTPtr gdt_ptr;
-TSS tss;
-u8 double_fault_stack[4096] = {0};
-
-void gdt_set_gate(int num, u64 base, u64 limit, u8 access, u8 gran) {
-    gdt[num].base_low = (base & 0xFFFF); // left only low 16bit
-    gdt[num].base_middle = (base >> 16) & 0xFF; // 3rd address byte
-    gdt[num].base_high = (base >> 24) & 0xFF; // 4th address byte
-
-    gdt[num].limit_low = (limit & 0xFFFF);
-    gdt[num].granularity = (limit >> 16) & 0x0F; // leave only first 4 bits (limit's left 16-19)
-    gdt[num].granularity |= gran & 0xF0; // get flags and concate two pieces so FFFFLLLL (L -- Limit; F -- flags)
-    gdt[num].access = access;
-
-    // fuck intel
-}
-
-
-void write_tss(int num) {
-    u64 base = (u64)&tss;
-    u64 limit = sizeof(tss);
-    u64 access = 0x89; // TSS_PRESENT | TSS_EXECUTABLE | TSS_ACCESSED;
-    u64 gran = 0;
-
-    gdt_set_gate(num, base, limit, access, gran);
-     *((u64*)&gdt[num+1]) = (base >> 32);   // really scary but not really hard
-                                            // just direct write 8bytes to num+1
-                                            // basically a hack but at this point i dont care
-}
-
-
-extern void gdt_flush(u64 gdt_ptr_addr); // entry.asm
-
-void gdt_init() {
-    gdt_ptr.limit = (sizeof(GDTDescriptor) * GDT_ENTIRES) - 1;
-    gdt_ptr.base = (u64)&gdt;
-
-    // 0: Null
-    gdt_set_gate(0, 0, 0, 0, 0);
-
-    // 1: Kernel Code (Ring 0)
-    // Access: 0x9A (Present, Ring0, Exec/Read)
-    // Granularity: 0x20 (Long Mode bit)                    access  ring 0    code  exec    code    readable
-    gdt_set_gate(1, 0, 0, 0x9A, 0x20);              //  0x9A = 1    00          1   1       0       1
-                                                    //  0x20 = 0010 0000 bit 5 is "Long mode"
-    // 2: Kernel Data (Ring 0)
-    // Access: 0x92 (Present, Ring0, Read/Write)
-    gdt_set_gate(2, 0, 0, 0x92, 0);                 //  0x92 = 1    00          1   0       0       1
-
-    // 3: User Data (Ring 3)
-    // Access: 0xF2 (Present, Ring3, Read/Write)
-    gdt_set_gate(3, 0, 0, 0xF2, 0);                 //  0xF2 = 1    11          1   0       0       1
-
-    // 4: User Code (Ring 3)
-    // Access: 0xFA (Present, Ring3, RWX)
-    gdt_set_gate(4, 0, 0, 0xFA, 0x20);              //  0xFA = 1    11          1   1       0       1
-
-    for (u64 i = 0; i < sizeof(TSS); i++) ((u8*)&tss)[i] = 0; // zeroifying tss struct
-
-    tss.iomap_base = sizeof(TSS);
-    tss.ist1 = (u64)double_fault_stack + sizeof(double_fault_stack);
-    write_tss(5);
-
-    gdt_flush((u64)&gdt_ptr);
-
-    // telling cpu that TSS info located at gdt[5]; offset = 5 * 8 = 40 = 0x28
-    __asm__ volatile ("ltr %%ax" :: "a" (0x28));
-}
-

kernel/src/arch/x86_64/idt.c

@@ -1,82 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-// Copyright (c) 2025 0xKarinyash
-
-#include <idt.h>
-#include <types.h>
-
-IDTEntry idt[256];
-IDTPtr idt_ptr;
-
-extern void isr0(); extern void isr1(); extern void isr2(); extern void isr3();
-extern void isr4(); extern void isr5(); extern void isr6(); extern void isr7();
-extern void isr8(); extern void isr9(); extern void isr10(); extern void isr11();
-extern void isr12(); extern void isr13(); extern void isr14(); extern void isr15();
-extern void isr16(); extern void isr17(); extern void isr18(); extern void isr19();
-extern void isr20(); extern void isr21(); extern void isr22(); extern void isr23();
-extern void isr24(); extern void isr25(); extern void isr26(); extern void isr27();
-extern void isr28(); extern void isr29(); extern void isr30(); extern void isr31();
-extern void irq0(void); extern void irq1(void);
-
-extern void idt_load(u64); // asm: lidt [rdi] / ret
-
-void idt_set_gate(int num, u64 handler, u16 sel, u8 flags) {
-    idt[num].offset_low  = handler & 0xFFFF;
-    idt[num].offset_mid  = (handler >> 16) & 0xFFFF;
-    idt[num].offset_high = (handler >> 32) & 0xFFFFFFFF;
-    
-    idt[num].selector = sel; // 0x08 (Kernel Code)
-    idt[num].ist = 0;
-    idt[num].attributes = flags;
-    idt[num].reserved = 0;
-}
-
-void idt_init() {
-    idt_ptr.limit = (sizeof(IDTEntry) * 256) - 1;
-    idt_ptr.base = (u64)&idt;
-
-    const u8 flags = 0x8E;
-    const u8 selector = 0x08;
-    
-
-    idt_set_gate(0,  (u64)isr0,  selector, flags);
-    idt_set_gate(1,  (u64)isr1,  selector, flags);
-    idt_set_gate(2,  (u64)isr2,  selector, flags);
-    idt_set_gate(3,  (u64)isr3,  selector, flags);
-    idt_set_gate(4,  (u64)isr4,  selector, flags);
-    idt_set_gate(5,  (u64)isr5,  selector, flags);
-    idt_set_gate(6,  (u64)isr6,  selector, flags);
-    idt_set_gate(7,  (u64)isr7,  selector, flags);
-    idt_set_gate(8,  (u64)isr8,  selector, flags);
-    idt_set_gate(9,  (u64)isr9,  selector, flags);
-    idt_set_gate(10, (u64)isr10, selector, flags);
-    idt_set_gate(11, (u64)isr11, selector, flags);
-    idt_set_gate(12, (u64)isr12, selector, flags);
-    idt_set_gate(13, (u64)isr13, selector, flags); 
-    idt_set_gate(14, (u64)isr14, selector, flags); 
-    idt_set_gate(15, (u64)isr15, selector, flags);
-    idt_set_gate(16, (u64)isr16, selector, flags);
-    idt_set_gate(17, (u64)isr17, selector, flags);
-    idt_set_gate(18, (u64)isr18, selector, flags);
-    idt_set_gate(19, (u64)isr19, selector, flags);
-    idt_set_gate(20, (u64)isr20, selector, flags);
-    idt_set_gate(21, (u64)isr21, selector, flags);
-    idt_set_gate(22, (u64)isr22, selector, flags);
-    idt_set_gate(23, (u64)isr23, selector, flags);
-    idt_set_gate(24, (u64)isr24, selector, flags);
-    idt_set_gate(25, (u64)isr25, selector, flags);
-    idt_set_gate(26, (u64)isr26, selector, flags);
-    idt_set_gate(27, (u64)isr27, selector, flags);
-    idt_set_gate(28, (u64)isr28, selector, flags);
-    idt_set_gate(29, (u64)isr29, selector, flags);
-    idt_set_gate(30, (u64)isr30, selector, flags);
-    idt_set_gate(31, (u64)isr31, selector, flags);
-
-    idt[8].ist = 1; // TSS
-    idt[13].ist = 1;
-    idt[14].ist = 1;
-
-    idt_set_gate(32, (u64)irq0, selector, flags);
-    idt_set_gate(33, (u64)irq1, selector, flags);
-
-    __asm__ volatile ("lidt %0" : : "m"(idt_ptr));
-}