[U-Boot-Users] How to debug u-boot?

[U-Boot-Users] How to debug u-boot?

[huasee]

hi,
    How to debug u-boot?Is it necessarily to use emluator e.g.BDI2000?
    Can I use some software to debug (just as kgdb?)

[U-Boot-Users] How to debug u-boot?

[Brian S. Park]

Hi every one.
I need help with debugging u-boot. If I comple u-Boot without -Os 
optimization, I get bunch of errors about missing functions. They are 
inline functions (in_be32, out_be32, out_8, etc) and I'm not sure how 
to make sure they are included when building the code without optimization.

I'm using ELDK4.1 for windows and u-Boot-1.3.3

Any help or pointers will be appreciated.

Thanks

Brian


===============================================================
Brian S. Park  brian.park at corelis.com  (562) 926-6727 x132
---------------------------------------------------------------
Everything we do helps our customers get to market
FASTER with HIGHER quality and LOWER cost
===============================================================

[U-Boot-Users] How to debug u-boot?

[Alessandro Rubini]

> I need help with debugging u-boot. If I comple u-Boot without -Os 
> optimization, I get bunch of errors about missing functions.

gcc docs say:
   GCC does not inline any functions when not optimizing unless you
   specify the `always_inline' attribute for the function, like this:
   [...]

I'm sorry you can't strip the "-Os", and you should debug the final
binary, despite all the reordering that takes place.

/alessandro

[U-Boot-Users] How to debug u-boot?

[Brian S. Park]

I'm sorry to send this the second time.
I missed the answer from Jerry Van Baren & Alessandro Rubini. I 
thought I had problem subscribing to the list.

Thank you for the answer.

Brian


At 07:13 PM 6/5/2008, Brian S. Park wrote:
>Hi every one.
>I need help with debugging u-boot. If I comple u-Boot without -Os
>optimization, I get bunch of errors about missing functions. They are
>inline functions (in_be32, out_be32, out_8, etc) and I'm not sure how
>to make sure they are included when building the code without optimization.
>
>I'm using ELDK4.1 for windows and u-Boot-1.3.3
>
>Any help or pointers will be appreciated.
>
>Thanks
>
>Brian
>
>
>===============================================================
>Brian S. Park  brian.park at corelis.com  (562) 926-6727 x132
>---------------------------------------------------------------
>Everything we do helps our customers get to market
>FASTER with HIGHER quality and LOWER cost
>===============================================================
>
>
>-------------------------------------------------------------------------
>Check out the new SourceForge.net Marketplace.
>It's the best place to buy or sell services for
>just about anything Open Source.
>http://sourceforge.net/services/buy/index.php
>_______________________________________________
>U-Boot-Users mailing list
>U-Boot-Users at lists.sourceforge.net
>https://lists.sourceforge.net/lists/listinfo/u-boot-users

===============================================================
Brian S. Park  brian.park at corelis.com  (562) 926-6727 x132
---------------------------------------------------------------
Everything we do helps our customers get to market
FASTER with HIGHER quality and LOWER cost
===============================================================

[U-Boot-Users] How to debug u-boot?

[Detlev Zundel]

Hi Brian,

> Hi every one.
> I need help with debugging u-boot. If I comple u-Boot without -Os 
> optimization, I get bunch of errors about missing functions. They are 
> inline functions (in_be32, out_be32, out_8, etc) and I'm not sure how 
> to make sure they are included when building the code without optimization.
>
> I'm using ELDK4.1 for windows and u-Boot-1.3.3
>
> Any help or pointers will be appreciated.

You have seen by now, that you cannot disable all optimization to
successfully build U-Boot (Linux is the same btw.).  I still do wonder,
why you want to disable optimization for debugging.  Is it because GCC
reorders some statements, so gdb seems to jump around in the source
lines?

If so, you can suppress the reordering as documented in our DULG[1]:

Add "-fno-schedule-insns -fno-schedule-insns2" to the CFLAGS for U-Boot.

Cheers
  Detlev

[1] http://www.denx.de/wiki/view/DULG/DebuggingTricks

-- 
 Those who do not understand Unix are condemned to reinvent it,
 poorly.
 - Henry Spencer, University of Toronto Unix hack
--
DENX Software Engineering GmbH,      MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich,  Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-40 Fax: (+49)-8142-66989-80 Email: dzu at denx.de