How can I debug the grub2.02?

How can I debug the grub2.02?

[Sherry Zhang(BJ-RD)]

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Hi all,
Platform : i386-pc
Grub2.02

I run into a error while I am testing.  I have found that it is normal berfore BIOS using the INT19 . But when the linux OS System is booting , I can see the error log.
So I doubt the error happens when the grub is running.
If I want to debug grub, how can I see the booting log of the boot.img and core.img?
For example :
Grub-core/kern/main.c
grub_boot_time ("After loading embedded modules.");
How can I see this log?

Best regards,
Sherry Zhang



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Re: How can I debug the grub2.02?

[Paul Menzel]

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Dear Sherry,


On 08/22/18 12:20, Sherry Zhang wrote:

> I run into a error while I am testing.  I have found that it is
> normal berfore BIOS using the INT19 . But when the linux OS System is
> booting , I can see the error log. So I doubt the error happens when
> the grub is running. If I want to debug grub, how can I see the
> booting log of the boot.img and core.img?

> For example : Grub-core/kern/main.c grub_boot_time ("After loading
> embedded modules."); How can I see this log?

You can use the serial console. Look into terminal_output. If you run
coreboot, you could also use cbmemc.


Kind regards,

Paul


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