x86-64 Grub question
Posted: Sat Jan 12, 2008 1:56 pm
when you install grub on an ISO when running a 64 bit OS does Grub enter long mode for you? Where can I find more info on what Grub does?
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x86-64 Grub question
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Posted: Sat Jan 12, 2008 2:18 pm
Grub legacy conforms to the Multiboot Specification and does not enter long mode for you. Grub2 might (read as I don't know) do this, but it is not yet stable.
Posted: Sat Jan 12, 2008 2:32 pm
Where does GRUB load the kernel?
Posted: Sat Jan 12, 2008 5:13 pm
RTFM. Link already posted.crazygray1 wrote:Where does GRUB load the kernel?
Posted: Sat Jan 12, 2008 8:40 pm
- kristian@Kristian:~/Documents/Decipher/Source/Kernel$ ld linker.ld kernel.o startkernel.o
ld: i386 architecture of input file `kernel.o' is incompatible with i386:x86-64 output
ld: i386 architecture of input file `startkernel.o' is incompatible with i386:x86-64 output
kristian@Kristian:~/Documents/Decipher/Source/Kernel$ ld linker.ld kernel.o startkernel.o
Posted: Sun Jan 13, 2008 12:14 am
To emulate i386 on 64 bit:
gcc: -m32
nasm: -f elf32
gas: --32
ld: -m elf_i386
Those are the options for the commands.
(you may have to re-compile)
-JL
gcc: -m32
nasm: -f elf32
gas: --32
ld: -m elf_i386
Those are the options for the commands.
(you may have to re-compile)
-JL
Posted: Sun Jan 13, 2008 6:58 am
my problem was with the ld commands.
thanks
thanks
Posted: Sun Jan 13, 2008 2:10 pm
someone on the IRC said that when booting from a cd that your bootloader has to be 2kb is that the limit? Or is there a limit at all?
Posted: Sun Jan 13, 2008 2:32 pm
I have a hard time beleving you actually carefully read that Wiki page... 
Look carefully at the "External links" section... there is a "related" document there.
Look carefully at the "External links" section... there is a "related" document there.
Posted: Sun Jan 13, 2008 2:40 pm
I have that doc saved on my computer.