|Subject:||multiboot header error|
|Date:||Tue, 29 May 2007 21:48:14 +0300|
|User-agent:||Icedove 22.214.171.124 (X11/20070329)|
At first, i built the sample kernel from http://www.gnu.org/software/grub/manual/multiboot/multiboot.html#Example-OS-code using the '-m32' gcc flag and by marking boot.S with the '.code32' directive. All these effectively created an elf32 image on my amd64 machine which built and booted without any trouble. :)
Then i proceeded to check if i can make GRUB2 boot the same kernel as a native elf64 image. So, i removed the above mentioned flag and directive, renamed any 'pushl' instruction to 'pushq', renamed registers 'eax' to 'rex' and 'ebx' to 'rbx', modified the magic number (0xe85250d6) and alingned it to 64-bits. When i tried to boot it i got: "error: No multiboot header found". :(
Is there something i did or didn't do correctly? I would greatly appreciate any feedback!
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