[gPXE-devel] How to enable gpxe for serial debug?

[Thomas Miletich]

Hello Sean,
please don't forget to CC the list in your mails(or use 'Reply All').

To enable debugging output for specific files, in this example undi.c,
use the following command line to build gpxe:

make bin/pnic.rom DEBUG=undi

This line enables all DBG() and DBGC() output in undi.c. There are
different debugging levels in gPXE, like DBG(level 1), DBG2(level 2),
DBGP(level 4) and DBGIO(level 8). They are used like a bitfield.
To enable DBG2() messages use DEBUG=undi:2. To enable DBG() and DBG2()
messages use DEBUG=undi:3. You simply add the values of the debugging
levels you want to enable. Separate multiple files with commas:
DEBUG=rtl8139,undi:3

Hope that helps
Thomas

On Fri, Jun 18, 2010 at 10:24 AM, Sean Shoufu Luo <luoshoufu at gmail.com> wrote:
> Thomas,
> Thanks for quick reply. I forget to paste my environment: I load pnic.rom in
> bochs.
> pnic.rom
> 1. #define CONSOLE_SERIAL
> 2. #DBGLVL_MAX  1
> It seems console works since I can see the log 'no more network devices' in
> the other end of serial. Is it?
> But the DBG is not enabled ... I call undi_start, but no expected log ...
> -Sean-
>
>
> On Fri, Jun 18, 2010 at 4:10 PM, Thomas Miletich <thomas.miletich at gmail.com>
> wrote:
>>
>> Hello,
>> to enable serial console support open the file src/config/console.h
>> and change the line
>>  //#define       CONSOLE_SERIAL
>> to
>>  #define       CONSOLE_SERIAL
>>
>> CONSOLE_PCBIOS is already enabled by default for x86 build targets and
>> there's no need to enable it again in console.h.
>>
>> The default settings are 115200 baud 8n1 on the first serial port(I/O
>> address 0x3f8). Most BIOSes allow changing the I/O address of the
>> serial ports. It's possible that your 'first' serial port now has the
>> I/O address of some other serial port and you have to adjust it's
>> value in the BIOS or in config/serial.h. Alternatively you could use
>> the serial port that as the I/O address 0x3f8 on your system.
>>
>> If this is what you already tried, we would like to know more about
>> your setup(i.e. what serial cable did you use, did you use the right
>> baud rate, etc).
>>
>> Thomas
>>
>> On Fri, Jun 18, 2010 at 9:57 AM, Sean Shoufu Luo <luoshoufu at gmail.com>
>> wrote:
>> > I am newbie for gpxe, and intend to transfer from etherboot to gpxe ....
>> > In etherboot, I just configure src/Config, but I don't find any
>> > configure
>> > file under gpxe.
>> > I tried to uncomment CONSOL_PCBIOS, CONSOL_SERIAL in config/console.h,
>> > but
>> > it seems not work!
>> > I didn't find workable guide from wiki, anyone can give a brief
>> > instruction?
>> > Or paste a guide link?
>> >
>> > Another question:  how to enable DBG() to work? It seems a bit complex
>> > ...
>> > Yours sincerely,
>> > Sean
>> > --
>> > Face to sun
>> >
>> > _______________________________________________
>> > gPXE-devel mailing list
>> > gPXE-devel at etherboot.org
>> > http://etherboot.org/mailman/listinfo/gpxe-devel
>> >
>> >
>
>
>
> --
> Face to sun
>