Is it possible to execute a raw binary file on linux?

boxerfangg · 07-27-2011, 05:54 PM

I want to know if it is possible to execute a raw binary file in linux. By raw binary I mean binary that the processor executes. Not ELF.

Here is the code in asm:

Code:

org 100h

; set video mode    
mov ax, 3     ; text mode 80x25, 16 colors, 8 pages (ah=0, al=3)
int 10h       ; do it!

; cancel blinking and enable all 16 colors:
mov ax, 1003h
mov bx, 0
int 10h


; set segment register:
mov     ax, 0b800h
mov     ds, ax

; print "hello world"
; first byte is ascii code, second byte is color code.

mov BYTE [02h], 'H'

mov BYTE [04h], 'e'

mov BYTE [06h], 'l'

mov BYTE [08h], 'l'

mov BYTE [0ah], 'o'

mov BYTE [0ch], ','

mov BYTE [0eh], 'W'
 
mov BYTE [10h], 'o'

mov BYTE [12h], 'r'

mov BYTE [14h], 'l'

mov BYTE [16h], 'd'

mov BYTE [18h], '!'




; color all characters:
mov cx, 12  ; number of characters.
mov di, 03h ; start from byte after 'h'

c:  mov BYTE [di], 11101100b   ; light red(1100) on yellow(1110)
    add di, 2 ; skip over next ascii code in vga memory.
    loop c

; wait for any key press:
mov ah, 0
int 16h

ret

And here it the compile:

Code:

brandon@brandon-NC686AA-ABA-a6700y:~/Desktop$ nasm test -f bin -o test.bin
brandon@brandon-NC686AA-ABA-a6700y:~/Desktop$ chmod +x test.bin
brandon@brandon-NC686AA-ABA-a6700y:~/Desktop$ ./test.bin
bash: ./test.bin: cannot execute binary file

chrism01 · 07-27-2011, 07:15 PM

I recommend using the Report button to ask the Mods to move this to Programming for faster/better responses.

dragos240 · 07-27-2011, 07:42 PM

You'll need a machine code parser I think.

Tinkster · 07-27-2011, 10:15 PM

This is a bit dated, but may give you some insight

http://www.linux.it/~rubini/docs/binfmt/binfmt.html

resetreset · 07-28-2011, 02:15 AM

OK, Tinkster's article went over my head a little, but whatever it is, it deals with hacking the *kernel* to add more facilities to it. On a *standard* kernel, IMHO, you'll need your file to be in ELF format before the Linux program loader can make sense of it.
And, again, if I remember my details correctly, you cannot call the ROM in protected mode, so those "int 10"s won't work ANYWAY. Also, your "wait for a keypress" code - is that a DOS interrupt it's calling? That OBVIOUSLY won't work.