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debugging relocated code

U-Boot-Users Stuart Yoder 3 participants 3 messages May 25, 2004

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Stuart Yoder

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What is typically done to debug relocated code with gdb? For example,
u-boot is linked at 0xFFF0000, but then relocates itself to 0x0FF03000.
The debug symbols all reference the linked location. After the
relocation occurs gdb is lost as far as symbolic information goes.

Am I supposed to link the code to the place I know it will end up after relocation?

Anyone know of a way in gdb to relocate all the symbols?

Thanks,

Stuart Yoder
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Hi Stuart,

Try the 'add-symbol-file' command. It relocates symbols to specified address. In your case, you can relocate symbols by following commands.

gdb> add-symbol-file u-boot 0x0ff03000
gdb> file u-boot

You may find more information in gdb manual.

Sincerely,
Ho

----- Original Message -----
From: Stuart Yoder
To: u-boot-users at lists.sourceforge.net
Sent: Tuesday, May 25, 2004 11:27 AM
Subject: [U-Boot-Users] debugging relocated code

What is typically done to debug relocated code with gdb? For example, u-boot is linked at 0xFFF0000, but then relocates itself to
0x0FF03000. The debug symbols all reference the linked location. After the relocation occurs gdb is lost as far as symbolic
information goes.

Am I supposed to link the code to the place I know it will end up after relocation?

Anyone know of a way in gdb to relocate all the symbols?

Thanks,

Stuart Yoder

#2 lore raw
In reply to Stuart Yoder
Quoted 2 lines · In message <001601c44286$0328e880$2900a8c0@foundation> you wrote:

What is typically done to debug relocated code with gdb? For example,

This requires a two-pass sort of solution. In the first pass, read the FAQ.

Quoted 1 line

Anyone know of a way in gdb to relocate all the symbols?

Sure. See http://www.denx.de/twiki/bin/view/DULG/WrongDebugSymbolsAfterRelocation

Quoted 6 lines

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Best regards,

Wolfgang Denk

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