Hi, i got some problems where I can't find a solution for.

Let's say I wrote something like this:

global kernel
kernel:
	mov ax, 0xb800
	mov ds, ax
	mov ax, 0
	mov si, ax
	mov al, 'x'
	mov byte [ds:si], al
ret
loop1: jmp loop1

This put the letter 'x' directly in the video memory.
So if I assemble it in a flat binary, put it on a floppy and boot from it, it works perfectly.

Now the problem is, if I want to combine my assembly object file with a object file from let's say a 'c' program, I can't use the flat binary format.
So i have to use the elf format.
So if I use "nasm kernel.asm -f elf -o kernel.o"
and dissasmble the file and check the specific code it looks like this:

00000000  66B800B88ED8      mov eax,0xd88eb800
00000006  66B800006689      mov eax,0x89660000
0000000C  C6                db 0xC6
0000000D  B078              mov al,0x78
0000000F  3E678804C3        mov [dword ds:ebx+rax*8],al
00000014  EBFE              jmp short 0x14

You see that my "

mov ds, ax
mov si, ax

aren't there anymore. And as you could think the code doesn't work anymore.

So is it possible to link assembly with other files using a flat binary?
Or is it possible to fix the problem of my disapearing code?
btw: if I use inline assembly in gcc and write the same code and compile it, the exact code dissapears.
So its not only the problem of nasm, also of gcc.


I hope someone understands me? And knows an answer?

If you want more info, just tell me :) thanks..