Move BootGDT definition to C

src/kernel/boot/boot.S

@@ -43,7 +43,7 @@ _start:
   mov cr0, eax
 
   //; Load a new GDT
-  lgdt [V2P(BootGDTp)]
+  lgdt [V2P(GDTp)]
 
   //; and update the code selector by a long jump
 jmp 0x8:V2P(long_mode_start)
@@ -76,7 +76,7 @@ upper_memory:
   mov cr3, rax
 
   //; Reload GDT
-  movabs rax, offset BootGDTp
+  movabs rax, offset GDTp
   lgdt [rax]
   mov rax, 0x0
   mov ss, rax

src/kernel/boot/boot_GDT.S

@@ -1,14 +0,0 @@
-#include <gdt.h>
-#include <memory.h>
-.intel_syntax noprefix
-
-.section .rodata
-.align PAGE_SIZE
-.global BootGDT
-.global BootGDTp
-BootGDT:
-  .long 0, 0
-  .long 0, (GDT_PRESENT | GDT_DPL(0) | GDT_CODE | GDT_LONG)
-BootGDTp:
-  .short 2*8-1
-  .quad offset BootGDT

src/kernel/cpu/gdt.c

@@ -0,0 +1,28 @@
+#include <stdint.h>
+#include <cpu.h>
+
+#define GDT_CODE      (3<<11)
+#define GDT_DPL(lvl)  ((lvl)<<13)
+#define GDT_PRESENT   (1<<15)
+#define GDT_LONG      (1<<21)
+
+
+struct gdt
+{
+  uint32_t _;
+  uint32_t flags;
+}__attribute__((packed));
+
+struct gdtp
+{
+  uint16_t len;
+  struct gdt *gdt;
+}__attribute__((packed));
+
+
+struct gdt BootGDT[] = {
+  {0, 0},
+  {0, GDT_PRESENT | GDT_DPL(0) | GDT_CODE | GDT_LONG}
+};
+
+struct gdtp GDTp = {2*8-1, BootGDT};

src/kernel/include/gdt.h

@@ -1,6 +0,0 @@
-#pragma once
-
-#define GDT_CODE      (3<<11)
-#define GDT_DPL(lvl)  ((lvl)<<13)
-#define GDT_PRESENT   (1<<15)
-#define GDT_LONG      (1<<21)