forked from PoliEcho-holding-org/kern
Added disk.asm include file
This commit is contained in:
@@ -1,29 +1,32 @@
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#!/bin/bash
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# Create build dir if it doesn't exist
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if !(test -d ./build); then
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mkdir ./build
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# Create ./build dir if it doesn't exist
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if !(test -d ././build); then
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mkdir ././build
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echo "Created ./build/ directory!"
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fi
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# Bootloader
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nasm -fbin src/boot.asm -o build/boot.bin
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nasm -fbin src/filetable.asm -o build/filetable.bin
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cat build/boot.bin build/filetable.bin > build/bootloader.bin
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nasm -fbin src/boot.asm -o ./build/boot.bin
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nasm -fbin src/filetable.asm -o ./build/filetable.bin
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# Kernel
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nasm -fbin src/kernel.asm -o build/kernel.bin
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nasm -fbin src/kernel.asm -o ./build/kernel.bin
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# Programs
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nasm -fbin src/fs/calc.asm -o build/calc.bin
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nasm -fbin src/fs/edit.asm -o build/edit.bin
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nasm -fbin src/fs/calc.asm -o ./build/calc.bin
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nasm -fbin src/fs/edit.asm -o ./build/edit.bin
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cat build/calc.bin build/edit.bin > build/files.bin
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cat ./build/calc.bin ./build/edit.bin > ./build/files.bin
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# Final binary
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cat build/bootloader.bin build/kernel.bin build/files.bin > build/kern.bin
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cat ./build/boot.bin ./build/filetable.bin ./build/kernel.bin ./build/files.bin > ./build/temp.bin
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dd if=/dev/zero of=./build/kern.iso bs=512 count=2880
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dd if=./build/temp.bin of=./build/kern.iso conv=notrunc
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rm -rf ./build/**.bin
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# Cleanup
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rm build/*[!kern].bin
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echo "Built kern.iso!"
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# Run QEMU
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qemu-system-x86_64 -drive format=raw,file="./build/kern.bin",index=0,media=disk -m 256M
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echo "Running QEMU..."
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qemu-system-x86_64 -drive format=raw,file="./build/kern.iso",index=0,media=disk -m 256M
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+1
-1
@@ -43,7 +43,7 @@ start:
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xor bx, bx
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mov ah, 2 ; Read from disk
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mov al, 3 ; Read 3 sectors (1.5kB)
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mov al, 4 ; Read 4 sectors (2kB)
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mov dl, byte [driveNumber] ; Drive number
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mov ch, 0 ; Cylinder
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+3
-3
@@ -15,8 +15,8 @@ filetable:
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; db 'all',0,0,0,0,0,0,0,'txt',0,1,7 ; all - start: 1, size: 7
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db 'boot',0,0,0,0,0,0, 'bin',0,1,1 ; boot.bin - start: 1, size: 1
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db 'filetable',0, 'txt',0,2,1 ; filetable.txt - start: 2, size: 1
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db 'kernel',0,0,0,0, 'bin',0,3,3 ; kernel.bin - start: 3, size: 3
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db 'calc',0,0,0,0,0,0, 'bin',0,6,1 ; calc.bin - start: 6, size: 1
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db 'edit',0,0,0,0,0,0, 'bin',0,7,2 ; edit.bin - start: 6, size: 2
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db 'kernel',0,0,0,0, 'bin',0,3,4 ; kernel.bin - start: 3, size: 4
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db 'calc',0,0,0,0,0,0, 'bin',0,7,1 ; calc.bin - start: 7, size: 1
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db 'edit',0,0,0,0,0,0, 'bin',0,8,3 ; edit.bin - start: 8, size: 2
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times 512-($-$$) db 0
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+7
-4
@@ -104,12 +104,15 @@ return:
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mov gs, ax
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jmp 0x2000:0x0000
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; - Includes -
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;; Includes
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%include "./src/lib/print.asm"
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; ------------
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%include "./src/lib/disk.asm"
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;; Variables
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statusBarMsg: db " -- HEX -- ", 0
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controlsMsg: db "'$' to execute code; '!' to quit", 0
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controlsMsg: db "'$' to execute code; '!' to quit; 's' to save", 0
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fileChoiceMsg: db "'n' for new file; 'o' to open a file", 0
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chooseModeMsg: db "'x' for Hex mode; 't' for Text mode", 0
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runMsg: db ENDL, ENDL, 0
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ranMsg: db ENDL, ENDL, " - Finished Execution - ", ENDL, 0
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@@ -121,4 +124,4 @@ codeLen: db 0
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hexCode: times 256 db 0 ; Code buffer
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ret
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times 2*512-($-$$) db 0
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times 3*512-($-$$) db 0
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+4
-7
@@ -402,15 +402,11 @@ graphicsTest:
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;
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reboot: jmp 0xffff:0x0000
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; ----------
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; Includes
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; ----------
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;; Includes
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%include "./src/lib/print.asm"
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%include "./src/lib/screen.asm"
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; --------
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; Data
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; --------
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;; Variables
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driveNumber: db 0
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startMsg: db "kern.", ENDL, ENDL, 0 ; The bootup message
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@@ -450,7 +446,8 @@ txtExt: db "txt", 0
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inputLen: db 0
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userInput: db 0
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;; Constants
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FILETAB_LOC equ 0x1000
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PROGRAM_LOC equ 0x8000
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times 3*512-($-$$) db 0
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times 4*512-($-$$) db 0
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+280
-1
@@ -1,5 +1,284 @@
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;
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; Loads a file from the filetable into a memory location
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; dl - Disk number
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; Params:
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; Filename (Null terminated)
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; Destination location segment
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; Destination location offset
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; Disk number
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;
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; Returns:
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; al - Exit code : 0 - Success; 1 - File not found; 2 - Disk error
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;
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loadFile:
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; Func prologue
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push bp
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mov bp, sp
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pusha
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mov byte [driveNum], dl
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mov bx, [bp+4] ; dest Offset
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mov fs, [bp+6] ; dest Segment
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mov si, [bp+8] ; Filename
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mov cx, 10
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mov di, filename
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.getFilename:
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lodsb ; mov byte al, [si]; inc si
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cmp al, 0 ; End of filename
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dec si ; Fill the rest with Null
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stosb
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loop .getFilename
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mov ax, FILETAB_LOC
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mov es, ax
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xor di, di ; es:di - Filetable location
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mov si, filename
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.filenameCheck:
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mov al, [di]
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cmp al, 0 ; End of filetable
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je .notFound
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cmp al, [si]
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je .beginCmp
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add di, 16
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jmp .filenameCheck
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.beginCmp:
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push di
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mov cl, 10
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.cmpLoop:
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mov al, [es:di]
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inc di
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cmp al, [si]
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jne .redoCheck
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dec cl
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jz .found
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inc si
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jmp .cmpLoop
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.redoCheck:
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mov si, filename
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pop di
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inc di
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jmp .filenameCheck
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.notFound:
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mov byte [exitCode], NOT_FOUND
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jmp .done
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.found:
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mov al, [es:di]
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inc di
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cmp al, 0 ; Skip NULLs untill extension
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je .found
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add di, 3 ; Skip extension
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inc di ; Skip Number of entries
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xor ax, ax ; Reset disk
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mov dl, [driveNum]
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int 0x13
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push fs
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mov ch, 0 ; Cylinder
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mov dh, 0 ; Head
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mov cl, [es:di] ; Sector
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inc di
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mov al, [es:di] ; Length in sectors
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mov ah, 2 ; Read from disk
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pop es ; es:bx - Destination
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int 0x13
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jnc .done
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mov byte [exitCode], DISK_ERROR
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.done:
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; Func epilogue
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popa
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mov sp, bp
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pop bp
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ret
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;
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; Saves a file to the disk and updates filetable
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; dl - Disk number
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; Params:
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; Filename (Null terminated)
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; Filetype (Null terminated)
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; Filesize (Byte)
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; Source location segment
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; Source location offset
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;
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; Returns:
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; al - Exit code : 0 - Success; 1 - File not found; 2 - Disk error
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;
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saveFile:
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; Func prologue
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push bp
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mov bp, sp
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pusha
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mov byte [driveNum], dl
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pop bx ; src Offset
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pop fs ; src Segment
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pop cx ; Filesize
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pop ax ; Filetype
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push bx
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mov byte [filesize], cl
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mov di, filetype
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mov cx, 3
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.filetype:
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lodsb
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cmp al, 0 ; End of filename
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dec si ; Fill the rest with Null
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stosb
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loop .getFilename
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pop si ; Filename
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mov cx, 10
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mov di, filename
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.getFilename:
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lodsb ; mov byte al, [si]; inc si
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cmp al, 0 ; End of filename
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dec si ; Fill the rest with Null
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stosb
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loop .getFilename
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mov ax, FILETAB_LOC
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mov es, ax
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xor di, di ; es:di - Filetable location
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mov si, filename
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.filenameCheck:
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mov byte al, [es:di+14]
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mov byte [availableSector], al
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mov byte al, [es:di+15]
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add byte [availableSector], al
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mov al, [di]
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cmp al, 0 ; End of filetable
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je createFile ; File doesn't exist, create new one
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cmp al, [si]
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je .beginCmp
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add di, 16
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jmp .filenameCheck
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.beginCmp:
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push di
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mov cl, 10
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.cmpLoop:
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mov al, [es:di]
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inc di
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cmp al, [si]
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jne .redoCheck
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dec cl
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jz .found
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inc si
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jmp .cmpLoop
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.redoCheck:
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mov si, filename
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pop di
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add di, 16
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jmp .filenameCheck
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.found: ; File already exists (override)
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; TODO: Ask user if they want to override file
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mov al, [es:di]
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inc di
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cmp al, 0 ; Skip NULLs untill extension
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je .found
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add di, 3 ; Skip extension
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inc di ; Skip Number of entries
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xor ax, ax ; Reset disk
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mov dl, [driveNum]
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int 0x13
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; TODO: Override current file
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; push fs
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; mov ch, 0 ; Cylinder
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; mov dh, 0 ; Head
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; mov cl, [es:di] ; Sector
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; inc di
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; mov al, [es:di] ; Length in sectors
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; mov ah, 3 ; Write to disk
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; pop es ; es:bx - Destination
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; int 0x13
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; jnc returnToCaller
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mov byte [exitCode], DISK_ERROR
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jmp return ; TODO: Fix this
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createFile: ; Appends a file to the filetable.
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mov cx, 10
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mov si, filename
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rep movsb ; Append the filename
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mov cx, 3
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mov si, filetype
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rep movsb ; Append the extension
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mov byte [es:di], 0 ; Number of entries
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mov byte al, [availableSector]
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stosb ; Starting sector
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mov byte al, [filesize]
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stosb ; File length in sectors
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; Write changed filetable to disk
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;! If filetable size changes, this will have to change (probably)
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xor bx, bx ; es:bx - Filetable location
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mov dl, [driveNum]
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mov ah, 3 ; Write to disk
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mov al, 1 ; Write 1 sector
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mov ch, 0 ; Cylinder
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mov dh, 0 ; Head
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mov cl, 1 ; Sector
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int 0x13
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jnc writeFileData
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mov byte [exitCode], DISK_ERROR
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jmp returnToCaller
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writeFileData: ; Writes file data to the disk
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mov ax, fs ; Source segment
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mov es, ax
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pop bx ; es:bx - Source
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mov ah, 3 ; Write to disk
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mov byte al, [filesize]
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mov dl, [driveNum]
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mov ch, 0 ; Cylinder
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mov dh, 0 ; Head
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mov byte cl, [availableSector]
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int 0x13
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jnc returnToCaller
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mov byte [exitCode], DISK_ERROR ; Exit code - Disk Error
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returnToCaller:
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; Func epilogue
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popa
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mov sp, bp
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pop bp
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mov byte al, [exitCode]
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ret
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;; Variables
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availableSector: db 0
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exitCode: db 0
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driveNum: db 0
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filesize: db 0
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filetype: times 3 db 0
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filename: times 10 db 0
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;; Constants
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FILETAB_LOC equ 0x1000
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; Exit codes
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SUCCESS equ 0
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NOT_FOUND equ 1
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DISK_ERROR equ 2
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