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I 've decided to use GRUB so i made simple hello word-ish OS to test it. i wrote NASM file that includes multiboot header and made NASM output it with -f elf so GRUB can read it. Mbcheck reports file is multiboot compilant, file reports it's 32-bit elf but GRUB is still reporting invalid format.
1: You don't need an ELF binary to be supported by GRUB. My own kernel is just a flat binary. Maybe it reads the ELF headers instead of the multiboot header.
2: You are trying to load your kernel below the 1M, or beyond physical memory. Check your multiboot header for this
"Certainly avoid yourself. He is a newbie and might not realize it. You'll hate his code deeply a few years down the road." - Sortie
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ELF is much more comfortable to use and I thing it's better(i was using flat binary with my own loader before). I am loading the kernel to load_addr of 1024*1024 which is exactly above 1m(hope i read the specs well). And i doubt it would print invalid executable format in this case. Can't be there some problem that the ELF have to be stripped etc?
