On Sat, Jun 25, 2022 at 5:35 PM ebashinskii <ebashinskii@xxxxxxxxx> wrote:
CPU: Intel x86 KabyLake. I'm using 5.17 Kernel built from upstream and GRUB 2.04When debugging the kernel initialization process I found out that there is a function void main(void) in the source file arch/x86/boot/main.c (source link: https://elixir.bootlin.com/linux/v5.17/source/arch/x86/boot/main.c#L134) which seems to be the entry point which the boot loader is supposed to jump into.But objdump-ing the Kernel image shows that there is no such symbol as main. GDB attached to QEMU does not know about this symbol either.The earliest stage of Kernel Initialization I could manage to catch with GDB is x86_64_start_kernel (source link: https://elixir.bootlin.com/linux/v5.17/source/arch/x86/kernel/head64.c#L467)
What are you trying to do that start-kernel is insufficiently early ?
main.c 's that you dont hit dont really matter do they ?
fwiw, I really like virtme
virtme-run $KRUN_SHOW $KRUN_STDS $KDBG_OPTS $* $QM_OPTS --smp 3 -s -S
the -s -S stops me early enough to anything Ive needed to so far.
_______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
