Merge remote-tracking branch 'Kernel/master'

Kernel/arch/amd64/bootstrap/multiboot/Helper/gdt32.s

@@ -0,0 +1,64 @@
+/*
+	This file is part of Fennix Kernel.
+
+	Fennix Kernel is free software: you can redistribute it and/or
+	modify it under the terms of the GNU General Public License as
+	published by the Free Software Foundation, either version 3 of
+	the License, or (at your option) any later version.
+
+	Fennix Kernel is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with Fennix Kernel. If not, see <https://www.gnu.org/licenses/>.
+*/
+
+.code32
+.section .bootstrap.text, "a"
+
+.align 32
+.global gdtr
+gdtr:
+	.word GDT32_END - GDT32 - 1
+	.long GDT32
+
+.align 32
+GDT32:
+	.quad 0x0
+
+	.word 0xFFFF
+	.word 0x0000
+	.byte 0x00
+	.word 0xCF9A
+	.byte 0x00
+
+	.word 0xFFFF
+	.word 0x0000
+	.byte 0x00
+	.word 0xCF92
+	.byte 0x00
+
+	.word 0x0100
+	.word 0x1000
+	.byte 0x00
+	.word 0x4092
+	.byte 0x00
+GDT32_END:
+	nop
+
+.global LoadGDT32
+LoadGDT32:
+	lgdt [gdtr]
+	ljmp $0x8, $ActivateGDT
+
+ActivateGDT:
+	mov $0x10, %cx
+	mov %cx, %ss
+	mov %cx, %ds
+	mov %cx, %es
+	mov %cx, %fs
+	mov $0x18, %cx
+	mov %cx, %gs
+	ret