Re: 2.6.23-rc1: no setup signature found...

[H. Peter Anvin]

Borislav Petkov wrote:
> 	Breakpoint 4, 0x00040200 in ?? ()
> 	1: x/i ($cs << 4) + $eip  0x40300:      lea    (%si),%dx
> 	(gdb) c
> 	Continuing.
>
> if i do delete here, it loads the second stage of grub and continues to load the
> kernel. Is there another way to land at the jmp instruction instead of poking
> blindly, maybe disassemble something parts of the initial code. \me reading
> grub-docs...

If you do "delete" without a breakpoint number, you're deleting all 
breakpoints.  I just experimented with grub, and it looks like it should 
break at 0x90200, so just set that breakpoint and none of the others.

	-hpa

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