We have already make Threads, New / Delete, STL integration ...
When we want to add more code, we need to increase the KSIZE variable in our bootsect.asm.
This is the code
Code: Select all
%define CS_ACCES 10011011b
%define DS_ACCES 10010011b
%define BASE 0x100
%define KSIZE 44
[BITS 16]
[ORG 0x0]
jmp start
%include "GDT.INC"
start:
mov [bootdrv],dl ; recuparation de l'unite de boot
; initialisation des segments en 0x07C0
mov ax,0x07C0
mov ds,ax
mov es,ax
mov ax,0x8000 ; stack en 0xFFFF
mov ss,ax
mov sp, 0xf000
; charger le noyau
xor ax,ax
int 0x13
push es
mov ax,BASE
mov es,ax
mov bx,0
mov ah,2
mov al,KSIZE
mov ch,0
mov cl,2
mov dh,0
mov dl,[bootdrv]
int 0x13
pop es
; initialisation de la GDT
; descInit base(32),limite(20/32),acces(8),flags(4/8),adresse(16)
descInit 0,0xFFFFF,CS_ACCES,1101b,gdt_cs
descInit 0,0xFFFFF,DS_ACCES,1101b,gdt_ds
; initialisation du pointeur sur la GDT
mov ax,gdtend ; calcule la limite de GDT
mov bx,gdt
sub ax,bx
mov word [gdtptr],ax
xor eax,eax ; calcule l'adresse lineaire de GDT
mov ax,ds
mov bx,gdt
call calcadr
mov dword [gdtptr+2],ecx
; passage en modep
cli
lgdt [gdtptr] ; charge la gdt
mov eax,cr0
or ax,1
mov cr0,eax ; PE mis a 1 (CR0)
jmp next
next:
mov ax,0x10 ; segment de donne
mov ds,ax
mov fs,ax
mov gs,ax
mov es,ax
mov ss,ax
mov esp,0x9F000
jmp dword 0x8:0x1000
end:
jmp end
gdt:
gdt_null:
dw 0,0,0,0
gdt_cs:
dw 0,0,0,0
gdt_ds:
dw 0,0,0,0
gdtend:
gdtptr:
dw 0x0000 ; limite
dd 0 ; base
bootdrv: db 0
;--------------------------------------------------------------------
;; NOP jusqu'a 510
times 510-($-$$) db 144
dw 0xAA55
our kernel size is 22658 Ko
any idea ? :/
