working on smp support, strange things happening!?

15 files changed, 194 insertions, 121 deletions

diff --git a/Makefile b/Makefile
index a45417a..2a8beb4 100644
--- a/Makefile
+++ b/Makefile
@@ -156,7 +156,7 @@ $(FOOLOS_VDI): disk.img
 
 # run in our local bochs (we need cirrus support for our vesa mode)
 run-bochs: all
-	~/opt/bochs-2.6.6/bochs -q -f bochs/bochsrc -rc bochs/bochsdebug 
+	~/opt/bochs-2.6.8/bin/bochs -q -f bochs/bochsrc  -rc bochs/bochsdebug 
 
 # run in qemu
 run-qemu:
@@ -165,7 +165,7 @@ run-qemu:
 run-qemu-debug: 
 #	qemu -enable-kvm -s -S ~/temp/FoolOs/disk.img
 #	qemu -enable-kvm -s -singlestep disk.img 
-	qemu -enable-kvm -s -S -kernel foolos.img -smp 4 # -initrd ext2.img  
+	qemu -enable-kvm -s -S -kernel foolos.img -smp 4  # -initrd ext2.img  
 
 stop:
 	killall qemu
diff --git a/README.md b/README.md
index eb8cea2..8c77cc8 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,7 @@
 Welcome to FoolOS
 =================
 
+
 Disclaimer
 ----------
 
@@ -71,6 +72,7 @@ Supported Platforms
 FoolOS is tested/developed on the following emulators/machines
 
 * bochs 2.6.6 (compiled with: ./configure --enable-clgd54xx --enable-a20-pin --enable-debugger --enable-disasm --enable-e1000 --with-x --with-x11 --with-term --enable-smp) (add -lpthread to LIBS in the Makefile!)
+* bochs 2.6.8 (compiled with: ./configure --enable-clgd54xx --enable-a20-pin --enable-debugger --enable-disasm --enable-e1000 --with-x --with-x11 --with-term --enable-smp) (add -lpthread to LIBS in the Makefile!)
 * qemu 1.1.2
 * virtual box 4.1.18
 * Acer Aspire 1810TZ (Notebook)
@@ -106,25 +108,28 @@ Fetures are under this line are currently disabled / not developed:
 Todos
 -----
 
-* Implement Multiboot Spec. User ELF for kernel itself
-* finish porting ncurses? (Does this require g++ toolchain?)
+* smp
+* porting ncurses? (Does this require g++ toolchain?)
+* Port more software (vim, coreutils, gcc, apache?)
 * Support some TTY standard (xterm)
 * implement read syscall!
 * /dev/console 
 * /dev/kb
-* Real User space
 
 * E1000 driver (or some other easy network card driver) maybe NS2000 better?
 * Networking stack 
 
-* Port more software (vim, coreutils, gcc, apache?)
 * Port X? 2d drivers, 3d drivers? hw acceleration.
-* USB driver (for stroage at least)
+* FPU?
 
 Issues
 ------
 
+* sbrk()
 * ESP collisions!?
+* TSS-ESP0?
+* kbfree()
+* pg_directory alloc 
 * implement posix(?) getdents instead of our own readdir.
 * Turning on some gcc optimizations breaks the kernel. (need debug so go for ELF!)
 * Assumed support for VESA mode 0x114 with linear addressing. (let the user select)
diff --git a/xxx/bochs/bochsdebug b/bochs/bochsdebug
index fabafe9..fabafe9 100644
--- a/xxx/bochs/bochsdebug
+++ b/bochs/bochsdebug
diff --git a/xxx/bochs/bochsrc b/bochs/bochsrc
index fc56d19..47a7d3f 100644
--- a/xxx/bochs/bochsrc
+++ b/bochs/bochsrc
@@ -76,7 +76,7 @@ display_library: x, options="gui_debug" # use GTK debugger gui
 #romimage: file=/usr/share/bochs/BIOS-bochs-latest
 #romimage: file=bios/seabios-0.5.1.bin
 #romimage: file=mybios.bin, address=0xfff80000 # 512k at memory top
-romimage: file=/home/miguel/opt/bochs-2.6.6/bios/BIOS-bochs-latest
+#romimage: file=/home/miguel/opt/bochs-2.6.6/bios/BIOS-bochs-latest
 
 
 #=======================================================================
@@ -131,7 +131,7 @@ romimage: file=/home/miguel/opt/bochs-2.6.6/bios/BIOS-bochs-latest
 #  2.2.6 2.1Ghz Athlon XP with Linux 2.6/g++ 3.4         12 to 15 Mips
 #  2.0.1 1.6Ghz Intel P4 with Win2000/g++ 3.3             5 to  7 Mips
 #=======================================================================
-cpu: count=2, ips=10000000 #, reset_on_triple_fault=1, ignore_bad_msrs=1, msrs="msrs.def"
+cpu: count=2 #, ips=1000000 #, reset_on_triple_fault=1, ignore_bad_msrs=1, msrs="msrs.def"
 
 #=======================================================================
 # CPUID:
@@ -260,7 +260,7 @@ memory: guest=128, host=1024
 #vgaromimage: file=/usr/share/vgabios/vgabios.debug.bin
 #vgaromimage: file=/usr/share/vgabios/vgabios.cirrus.bin
 #vgaromimage: file=/usr/share/bochs/VGABIOS-lgpl-latest
-vgaromimage: file=/home/miguel/opt/bochs-2.6.6/bios/VGABIOS-lgpl-latest-cirrus
+#vgaromimage: file=/home/miguel/opt/bochs-2.6.6/bios/VGABIOS-lgpl-latest-cirrus
 
 #=======================================================================
 # VGA:
@@ -269,7 +269,7 @@ vgaromimage: file=/home/miguel/opt/bochs-2.6.6/bios/VGABIOS-lgpl-latest-cirrus
 # values are 'vbe' for Bochs VBE and 'cirrus' for Cirrus SVGA support.
 #=======================================================================
 #vga: extension=vbe
-vga: extension=cirrus
+#vga: extension=cirrus
 
 #=======================================================================
 # FLOPPYA:
@@ -377,7 +377,7 @@ vga: extension=cirrus
 # The biosdetect option has currently no effect on the bios
 #
 # Examples:
-   ata0-master: type=disk, mode=flat, path=FoolOS.img #, cylinders=10, heads=4, spt=18
+   ata0-master: type=disk, mode=flat, path=disk.img #, cylinders=10, heads=4, spt=18
 #   ata0-master: type=disk, mode=flat, path=disk.img
 #   ata0-slave:  type=disk, mode=flat, path=20M.sample, cylinders=615, heads=4, spt=17
 #   ata1-master: type=disk, mode=flat, path=30M.sample, cylinders=615, heads=6, spt=17
@@ -443,7 +443,7 @@ boot: disk
 # 
 # Default value are sync=none, time0=local
 #=======================================================================
-clock: sync=realtime, time0=local
+#clock: sync=realtime, time0=local
 
 
 #=======================================================================
@@ -468,7 +468,7 @@ clock: sync=realtime, time0=local
 #   log: /dev/tty
 #=======================================================================
 #log: /dev/stdout
-log: ./bochs.log
+#log: ./bochs.log
 
 #=======================================================================
 # LOGPREFIX:
@@ -508,10 +508,10 @@ log: ./bochs.log
 # cause bochs to become unstable.  The panic is a "graceful exit," so
 # if you disable it you may get a spectacular disaster instead.
 #=======================================================================
-panic: action=ask
-error: action=report
-info: action=report
-debug: action=report
+#panic: action=ask
+#error: action=report
+#info: action=report
+#debug: action=report
 #debug: action=report
 #pass: action=fatal
 
@@ -525,7 +525,7 @@ debug: action=report
 #=======================================================================
 #debugger_log: /dev/null
 #debugger_log: debugger.out
-debugger_log: -
+#debugger_log: -
 
 #=======================================================================
 # COM1, COM2, COM3, COM4:
@@ -641,7 +641,7 @@ debugger_log: -
 # Examples:
 #   keyboard_serial_delay: 200
 #=======================================================================
-keyboard_serial_delay: 250
+#keyboard_serial_delay: 250
 
 #=======================================================================
 # KEYBOARD_PASTE_DELAY:
@@ -658,7 +658,7 @@ keyboard_serial_delay: 250
 # Examples:
 #   keyboard_paste_delay: 100000
 #=======================================================================
-keyboard_paste_delay: 100000
+#keyboard_paste_delay: 100000
 
 #=======================================================================
 # MOUSE:
@@ -691,7 +691,7 @@ keyboard_paste_delay: 100000
 #   mouse: type=serial, enabled=1
 #   mouse: enabled=0, toggle=ctrl+f10
 #=======================================================================
-mouse: enabled=1
+#mouse: enabled=1
 
 #=======================================================================
 # private_colormap: Request that the GUI create and use it's own
@@ -704,7 +704,7 @@ mouse: enabled=1
 #   private_colormap: enabled=1
 #   private_colormap: enabled=0
 #=======================================================================
-private_colormap: enabled=0
+#private_colormap: enabled=0
 
 #=======================================================================
 # ne2k: NE2000 compatible ethernet adapter
@@ -958,8 +958,8 @@ private_colormap: enabled=0
 #
 #
 ##
-pci: enabled=1, chipset=i440fx, slot1=cirrus
+#pci: enabled=1, chipset=i440fx, slot1=cirrus
 #i440fxsupport: enabled=1, slot1=cirrus
-e1000: enabled=1, mac=52:54:00:12:34:56 #, ethmod=slirp, script=slirp.conf
+#e1000: enabled=1, mac=52:54:00:12:34:56 #, ethmod=slirp, script=slirp.conf
 
 
diff --git a/fs/fs.c b/fs/fs.c
index 19027d6..bc43e22 100644
--- a/fs/fs.c
+++ b/fs/fs.c
@@ -41,6 +41,12 @@ void fs_mount(multiboot_information *info)
     }
 }
 
+void fs_content(char *path, uint32_t dest, uint32_t max_bytes)
+{
+	int inode= ext2_filename_to_inode(root_ext2_ramimage, path);
+	ext2_inode_content(root_ext2_ramimage,inode,dest,max_bytes);
+}
+
 uint32_t fs_get_root_ext2_ramimage()
 {
     return root_ext2_ramimage;
diff --git a/kernel/config.h b/kernel/config.h
index 8329457..74304d8 100644
--- a/kernel/config.h
+++ b/kernel/config.h
@@ -8,7 +8,7 @@
 #define FOOLOS_CONFIG_H
 
 #define FOOLOS_CONSOLE_AUTOBREAK    // add newline automatically at end of line
-//#define FOOLOS_LOG_OFF	   // do not log anything 
+#define FOOLOS_LOG_OFF	   // do not log anything 
 #define FOOLOS_CONSOLE		    // otherwise VESA will be used!	
 #define FOOLSOS_SHOW_VESAMODES
 #define MEM_PRINT_MEMORYMAP
diff --git a/kernel/interrupts.c b/kernel/interrupts.c
index a7e021c..088c94e 100644
--- a/kernel/interrupts.c
+++ b/kernel/interrupts.c
@@ -173,10 +173,10 @@ void int_init(uint16_t sel)
     int_install_ir(0x80, 0b11101110, 0x08,&int_syscall_handler);
 
 
-    int_install();
+  int_install();
 
     // now we can enable interrupts back again
-    x86_int_enable();
+   x86_int_enable();
 
 }
 
@@ -191,3 +191,4 @@ void int_install()
 
     __asm__("lidt %0"::"m" (idtd));
 }
+
diff --git a/kernel/kernel.c b/kernel/kernel.c
index e5369f4..df3a573 100644
--- a/kernel/kernel.c
+++ b/kernel/kernel.c
@@ -37,7 +37,6 @@ void kernel_main(uint32_t eax,uint32_t ebx)
     // 
     console_init();
 
-
     //
     // PR
     //
@@ -55,6 +54,11 @@ void kernel_main(uint32_t eax,uint32_t ebx)
     //
     gdt_setup();
 
+    //
+    // Setup Interrupts (code segment: 0x08)
+    //
+    int_init(0x08);
+
 
     // 
     // Process Multiboot Header
@@ -63,6 +67,16 @@ void kernel_main(uint32_t eax,uint32_t ebx)
 
 
     //
+    // Gather Info about other processors. (APs = application processors)
+    // ACPI or MP
+    //
+    smp_processors procdata;    
+
+    if(!acpi_find(&procdata))
+	if(!mp_find(&procdata))
+	    panic(FOOLOS_MODULE_NAME,"ACPI and MP search failed! I do not want to continue!");
+
+    //
     //	Memory Init
     //
     //  after this is set up we will be able to allocate and deallocate 
@@ -71,35 +85,22 @@ void kernel_main(uint32_t eax,uint32_t ebx)
     uint32_t kernel_blocks=mem_init(info);
 
     //
-    // Gather Info about other processors. (APs = application processors)
-    // ACPI or MP
-    //
-    smp_processors procdata;    
+    // Mount Root EXT2 ramimage (needs to be done before other processors started, because of /boot/mp.bin)
+    // 
+    fs_mount(info);
 
-    if(!acpi_find(&procdata))
-	if(!mp_find(&procdata))
-	    panic(FOOLOS_MODULE_NAME,"ACPI and MP search failed! I do not want to continue!");
     // 
-    // Start the other Processors (before paging)
+    // Start the other Processors (before paging because apic addr etc..?)
     //
-    smp_log_procdata(&procdata);
+    // smp_log_procdata(&procdata);
     //TODO: !!! Check commented out sleep ()!!!
-    //smp_start_aps(&procdata,0x80000);	// starts at 0x80000 
-					// but it will be copied over mbr
-    while(1);
+    smp_start_aps(&procdata,"/boot/mp.bin"); //will be copied over mbr
 
     //
     // Activate Virtual Memory (paging)
     //
     pdirectory *dir=vmem_init(kernel_blocks);
 
-
-    //
-    // Setup Interrupts (code segment: 0x08)
-    //
-    int_init(0x08);
-
-  
     //
     // Scan the PCI Bus
     // 
@@ -107,13 +108,6 @@ void kernel_main(uint32_t eax,uint32_t ebx)
     // Its driver will be hopefully implemented one day ;) TODO
     //
     //pci_init();
-   
-
-    
-    //
-    // Mount Root EXT2 ramimage
-    // 
-    fs_mount(info);
     
 
     //
@@ -122,6 +116,7 @@ void kernel_main(uint32_t eax,uint32_t ebx)
     task_init(dir); 
 
 
+
     //
     // Abvoe should never returon
     //
diff --git a/kernel/smp.c b/kernel/smp.c
index 8d122ee..f776c72 100644
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -16,19 +16,22 @@ uint32_t c1,c2,c3;
 volatile uint8_t proc;
 uint32_t cpu_counter[SMP_MAX_PROC];
 
+extern 
+
 void smp_main()
 {
-    ///	TODO
-    /////// SYMMETRIC MULTIPROCESSING, APS get caought here, move it away ///
-    // catch the APs (Application Processors)
-//    if(mp==1)
-    {
-	uint32_t ebp=pmmngr_alloc_block()+4095;
 
-	asm volatile("mov %0, %%ebp"::"r"(ebp));
-        asm volatile("mov %ebp, %esp");
-        asm volatile("jmp kernel_ap");
-    }
+  //  int_install();
+ //   x86_int_enable();
+    switch_to_user_mode();
+
+    while(1);
+
+    uint32_t ebp=pmmngr_alloc_block()+4095;
+
+    asm volatile("mov %0, %%ebp"::"r"(ebp));
+    asm volatile("mov %ebp, %esp");
+    asm volatile("jmp kernel_ap");
 
     proc=c1=c2=c3=0;
     for(int i=0;i<SMP_MAX_PROC;i++)cpu_counter[i]=0;
@@ -58,22 +61,20 @@ void smp_log_procdata(smp_processors *procdata)
 
 }
 
+
 // this will start all our application processors!
-void smp_start_aps(smp_processors *pros,uint8_t *start_sel)
-{
+void smp_start_aps(smp_processors *pros,char *path)
+{	
+	//lets copy the binary into mbr
+	fs_content(path,0x7000,0x100); // copy 0x100 bytes to 0x7000
 
-    //lets copy the code to the bootsector !
-	
-	uint8_t *dest=0x7000;
-	for(int i=0;i<0x100;i++)
-	{
-	    dest[i]=start_sel[i];
+	// tell them where to enter (agreed adress at 0x8010)
+	uint32_t *entry=0x8010;
+	*entry=smp_main;
 
-	}
-    
 	//bsp (boot processor) enables its local apic
 	uint32_t *reg=pros->local_apic_address+FOOLOS_APIC_SPUR_INT;
-	*reg=0xffffffff; // all bits 1 and interrupt 255
+//	*reg=0xffffffff; // all bits 1 and interrupt 255
 
         for(int i=0;i<pros->processors;i++)
 	{
@@ -90,12 +91,20 @@ void smp_start_aps(smp_processors *pros,uint8_t *start_sel)
 	    *reg=(5<<8)|(1<<14); // 101 INIT
 
 	    // do we really neet this?
+	    // TODO!!
 	    // todo: use some real sleep (not implemented yet :( )
 	    //sleep(30);
 
 	    // start proc 0x7 = 0x7000; etc..
 	    *reg=(6<<8)|(1<<14)|0x7; // 110 SIPI
+
+	    //bsp (boot processor) enables its local apic
+	    uint32_t *reg=pros->local_apic_address+FOOLOS_APIC_SPUR_INT;
+	  //  *reg=0xffffffff; // all bits 1 and interrupt 255
+
+	    
 	}
 }
 
 
+
diff --git a/kernel/syscalls.c b/kernel/syscalls.c
index 9671469..e9ef9d5 100644
--- a/kernel/syscalls.c
+++ b/kernel/syscalls.c
@@ -31,6 +31,7 @@ int syscall_lseek(int file,int ptr,int dir)
 // TODO: /dev/console or /dev/tty1 - /dev/ttyN
 int syscall_write(int file, char *buf, int len)
 {
+    lock_spin(2);
 
     //x86_int_disable();
     #ifdef LOG_SYSCALLS
@@ -44,6 +45,7 @@ int syscall_write(int file, char *buf, int len)
     {
 	console_put_char_green(buf[i]);
     }
+    lock_release(2);
     //x86_int_enable();
     return len;
 }
diff --git a/kernel/task.c b/kernel/task.c
index 000dc74..54381fa 100644
--- a/kernel/task.c
+++ b/kernel/task.c
@@ -82,8 +82,8 @@ volatile uint32_t my_scheduler(uint32_t oldesp)
 // this gets called by our clock interrupt regularly!
 volatile uint32_t task_switch_next(uint32_t oldesp)
 {
-    asm volatile("sti");
 
+    //syscall_write(1,"\n\n*tick*\n\n",10);
     timer_tick();
 
 
@@ -161,7 +161,7 @@ volatile void task_init(pdirectory *dir)
     task_list[0].esp = 0; // will be set by next task_switch_next() call.
     current_task=0;
     
-
+    while(1);
     switch_to_user_mode();
 
     //syscall_execve("/bin/foolshell",argv_init,env_init); 
diff --git a/kernel/usermode.c b/kernel/usermode.c
index 76128d1..ff16156 100644
--- a/kernel/usermode.c
+++ b/kernel/usermode.c
@@ -55,9 +55,11 @@ void install_tss(int cpu_no){
 
 void switch_to_user_mode() 
 {
-    char text[]="internal";
-    write(1,text,10);
-    asm_usermode();
+    char text[]="[internal] ";
+
+    //asm_usermode();
+	write(1,text,11);
+
     while(1); // will not be reached?
 }
 
@@ -75,11 +77,11 @@ void userfunc()
 	log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"we are usermode!");
     }
 
-
-    while(1) 
-    {
 	
     char text[]="syscalling!";
     write(1,text,10);
+
+    while(1) 
+    {
     }
 }
diff --git a/mp/mp.asm b/mp/mp.asm
new file mode 100644
index 0000000..740a1a0
--- /dev/null
+++ b/mp/mp.asm
@@ -0,0 +1,84 @@
+; master boot record for application processors
+
+[org 0x7000]
+[bits 16]
+
+    
+
+    cli				;switch off interrupts!
+    lgdt [gdt_descriptor]	;load descriptor table!
+
+    ;switch on 32-bit protected mode
+    mov eax, cr0
+    or eax,0x1 
+    mov cr0, eax
+
+    jmp 0x8:init_pm
+
+[bits 32]
+
+
+LLOCK:	    dd 0
+
+init_pm:
+
+    mov ax, 0x10
+    mov ds, ax
+    mov ss, ax
+    mov es, ax
+    mov fs, ax
+    mov gs, ax
+
+    mov ebp, 0x8000
+    mov esp, ebp
+
+    call boot_32_pm	    ;continue booting in 32-bit protected mode
+
+boot_32_pm:
+
+    mov eax, 1		 ; semaphore	
+    xchg eax, [LLOCK]
+    cmp eax,1
+    je $
+
+    call [0x8010] ;kernel_ap			        ;jump into our Kernel!
+    jmp $ ; should never be reached
+
+
+gdt_start:
+
+gdt_null:   ;null descriptor (2 x 4 bytes)
+    dd 0x0
+    dd 0x0
+
+gdt_code:
+    ; flags:
+    ; present: 1 / privilege: 00 / type: 1
+    ; code: 1 / conforming: 0 / readable: 1 / accessed: 0
+    ; granularity: 1 / 16-bit default: 1 / 64-bit seg: 0 / AVL: 0
+    dw 0xffff	    ;limit
+    dw 0x0	    ;base
+    db 0x0	    ;base
+    db 10011010b    ;flags
+    db 11001111b    ;flags & seg.limit
+    db 0x0	    ;base
+
+gdt_data:
+    ; flags:
+    ; code: 0 / expand down: 0 / writable: 1 / accessed: 0
+    dw 0xffff
+    dw 0x0
+    db 0x0
+    db 10010010b
+    db 11001111b
+    db 0x0
+
+gdt_end:
+
+gdt_descriptor:
+    dw gdt_end-gdt_start-1
+    dd gdt_start
+
+CODE_SEG equ gdt_code - gdt_start
+DATA_SEG equ gdt_data - gdt_start
+
diff --git a/userspace/Makefile b/userspace/Makefile
index 8e97ac8..666f210 100644
--- a/userspace/Makefile
+++ b/userspace/Makefile
@@ -1,3 +1,4 @@
+
 CC=i686-foolos-gcc
 
 CFLAGS=
@@ -14,13 +15,16 @@ LDFLAGS=-lfool
 
 PROGS=foolshell ls simple brainfuck add checker clear task1 task2 init cat
 
-ext2.img: $(PROGS) 
+include ../Makefile.common
+
+ext2.img: $(PROGS) ../mp/mp.bin
 	dd if=/dev/zero of=ext2.img bs=512 count=10000
 	sudo mkfs.ext2 -O none ext2.img -F
 	mkdir mnt
 	sudo mount ext2.img mnt
 	sudo chown miguel mnt
 	mkdir -p mnt/home/miguel
+	mkdir -p mnt/boot
 	echo "hello one" > mnt/home/miguel/test1.txt
 	mkdir -p mnt/bin
 	cp $^ mnt/bin
@@ -28,6 +32,7 @@ ext2.img: $(PROGS)
 #	cp ~/temp/fool-os-stuff/binutils-build-host-foolos/binutils/readelf mnt/bin
 	cp ../font/binfont.bin mnt/
 	cp ~/temp/fool-os-stuff/ncurses-5.9/progs/tput mnt/bin
+	cp ../mp/mp.bin mnt/boot/
 	mkdir -p mnt/etc
 	echo "127.0.0.1  localhost" > mnt/etc/hosts
 	sync
diff --git a/xxx/boot2/mp.asm b/xxx/boot2/mp.asm
deleted file mode 100644
index 6273226..0000000
--- a/xxx/boot2/mp.asm
+++ /dev/null
@@ -1,36 +0,0 @@
-; other processors will enter here!
-[org 0x7000] ; here the binary will be loaded
-
-[bits 16]
-
-    cli				;switch off interrupts!
-    lgdt [gdt_descriptor]	;load descriptor table!
-
-    ;switch on 32-bit protected mode
-    mov eax, cr0
-    or eax,0x1 
-    mov cr0, eax
-
-    jmp 0x8:init_pm
-
-[bits 32]
-init_pm:
-
-    mov ax, 0x10
-    mov ds, ax
-    mov ss, ax
-    mov es, ax
-    mov fs, ax
-    mov gs, ax
-
-    mov ebp, 0x95000
-    mov esp, ebp
-
-    call boot_32_pm	    ;continue booting in 32-bit protected mode
-
-boot_32_pm:
-
-;
-    call 0x18000			        ;jump into our Kernel!
-
-%include "GDT.asm"