[U-Boot-Users] How to debug u-boot?
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@corelis.com (562) 926-6727 x132 --------------------------------------------------------------- Everything we do helps our customers get to market FASTER with HIGHER quality and LOWER cost ===============================================================
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
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@corelis.com (562) 926-6727 x132
Everything we do helps our customers get to market FASTER with HIGHER quality and LOWER cost ===============================================================
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=============================================================== Brian S. Park brian.park@corelis.com (562) 926-6727 x132 --------------------------------------------------------------- Everything we do helps our customers get to market FASTER with HIGHER quality and LOWER cost ===============================================================
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
participants (3)
-
Alessandro Rubini -
Brian S. Park -
Detlev Zundel