(no subject)

[Zhao Yu,SCNB R&D NNA(BJ)]

I just begin to read some code in GRUB2, I met a question.
Could you help me out?

In function
void
grub_rescue_cmd_multiboot (int argc, char *argv[])
{
     ...
    if (grub_multiboot_load_elf (file, buffer) != GRUB_ERR_NONE)
    goto fail;
    ...
}
Do that mean the OS image must be elf format?
Or there are some miunderstand.

Thank you