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how can i start linux kernel from my own bootloader ? i have already formatted my flash drive to ext3 and pasted the compiled kernel there. . now how can i load linux from my assembly code ? examples are much welcome // Thankyou in advance ..

Regards,
Mohsin.

Um, what? No, linux certainly is not multiboot compliant. Linux uses its own boot protocol, which for x86 is fairly well documented. Newer kernels have both 16-bit and 32-bit entry points. Look at Documentation/x86/boot.txt in the linux kernel source.

Whoops, my bad.

Yeah, if you want to load Linux you'll have to implement the bzImage format. From looking at it briefly, it doesn't look too complicated - there's a decompression stub that handles all the interesting stuff in the kernel image, you just have to find out how to locate the entry point and how to pass parameters/modules/whatever.

can someone please give me an example ? i have tried searching alot .. all i get is theory

sp3tsnaz wrote:can someone please give me an example ? i have tried searching alot .. all i get is theory

Sure, look at the grub source code. But really, the boot protocol as documented in Documentation/x86/boot.txt should be more than enough.

so if i have a 32 bit operating system , do i have to call start_32 to get linux kernel running ?

For the third time, read boot.txt. Stop bugging us until you've read it.