xnoe/xnoe-os
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Modified load_file to work directly from the stack

Browse Source
This commit is contained in:
Xnoe 2021-08-30 07:02:01 +01:00
parent 14fcc32d79
commit df9f175662
Signed by: xnoe
GPG Key ID: 45AC398F44F0DAFE
1 changed files with 6 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
kernel.asm
View File

@ -276,20 +276,14 @@ file_exists_found:
load_file:
push bp
mov bp, sp
mov ax, word [bp + 4]
mov word [_load_segment], ax
mov ax, word [bp + 6]
mov word [_load_pointer], ax
mov ax, word [bp + 8]
mov word [_load_cluster], ax
mov ax, word [_load_segment]
mov ax, word [bp + 4]
mov es, ax
load_file_loop:
mov bx, word [_load_pointer]
mov bx, word [bp + 6]
mov al, byte [_load_cluster]
mov al, byte [bp + 8]
add al, 34
mov cl, al
@ -301,26 +295,22 @@ load_file_loop:
int 13h
add word [_load_pointer], 512
add word [bp + 6], 512
mov si, word [_load_cluster]
mov si, word [bp + 8]
shl si, 1
add si, 4000h
; add si, 1
cmp word [ds:si], 0ffffh
je load_file_loaded
add word [_load_cluster], 1
add word [bp + 8], 1
jmp load_file_loop
load_file_loaded:
pop bp
ret 6
_load_pointer dw 0
_load_cluster dw 0
_load_segment dw 0
decode_filename:
push bp
mov bp, sp