[9fans] how to use 9loaddebug

[9fans] how to use 9loaddebug

[Gabriel Diaz]

hello

i am trying to use 9loaddebug to see if it can help to discover why
when i put the bios with sata in enhaced mode 9load hangs.

I used disk/format as in prep(8), but it just prints PBS2... and hangs
(and now hangs with all possible ide configurations in bios, so i
can't boot anymore).

is that the way 9loaddebug should be used or i missed something?

thanks,

gabi

Re: [9fans] how to use 9loaddebug

[Russ Cox]

> is that the way 9loaddebug should be used or i missed something?

9loaddebug is a copy of 9load that is linked like a regular plan 9 executable,
so that it can be used with acid (as shown by the commands that
mk 9loaddebug prints).

a typical use is when 9load crashes at PC 0x8001023a you run

	% acid 9loaddebug
	acid: map({"text", 0x80010000, 0x80090000, 0x00000020})
	acid: src(0x8001023a)

it is "debug" in the sense that it has debugging information
usable by acid.

it is not "debug" in the sense that it is a working binary
that prints debugging info.  you'll need to put the original
9load back in order to boot again (use a plan 9 cd).

russ

Re: [9fans] how to use 9loaddebug

[Gabriel Diaz]

hello

oh, thank you, should i submit a patch to 9load man page with this information?

gabi


On 6/7/07, Russ Cox <rsc@swtch.com> wrote:
> > is that the way 9loaddebug should be used or i missed something?
>
> 9loaddebug is a copy of 9load that is linked like a regular plan 9 executable,
> so that it can be used with acid (as shown by the commands that
> mk 9loaddebug prints).
>
> a typical use is when 9load crashes at PC 0x8001023a you run
>
>         % acid 9loaddebug
>         acid: map({"text", 0x80010000, 0x80090000, 0x00000020})
>         acid: src(0x8001023a)
>
> it is "debug" in the sense that it has debugging information
> usable by acid.
>
> it is not "debug" in the sense that it is a working binary
> that prints debugging info.  you'll need to put the original
> 9load back in order to boot again (use a plan 9 cd).
>
> russ
>
>

Re: [9fans] how to use 9loaddebug

[erik quanstrom]

did the original 9load hang witout printing anything?

"PBS2..." is printed by pbslba. you might not be
successfully loading/jumping to 9load at all. one thing
you can do is add

	i8042a20();
	memset(m, 0, sizeof(Mach));
+	consinit("0", 0);
+	print("9load started\n");

right at the top of 9load.  if you don't get there,
the the problem is in pbslba.

- erik

Re: [9fans] how to use 9loaddebug

[Gabriel Diaz]

hello

the problem was what russ said, now i have it working again,

thanks

gabi


On 6/7/07, erik quanstrom <quanstro@coraid.com> wrote:
> did the original 9load hang witout printing anything?
>
> "PBS2..." is printed by pbslba. you might not be
> successfully loading/jumping to 9load at all. one thing
> you can do is add
>
>         i8042a20();
>         memset(m, 0, sizeof(Mach));
> +       consinit("0", 0);
> +       print("9load started\n");
>
> right at the top of 9load.  if you don't get there,
> the the problem is in pbslba.
>
> - erik
>
>
>