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Issues with debugging with bootelf command on U-boot

Question asked by Dat Ho on Aug 17, 2015
Latest reply on Aug 31, 2015 by Dat Ho

I tried to follow the steps explained in document AN5137 to debug an application using u-boot, but every Bare Board application that I start with elfboot results with an undefined instruction error. The project I load is always the default project without any added code.


Here is the terminal results of the bootelf:


Hit any key to stop autoboot:  0

=> tftp 82000000 debug-core0.elf

Speed: 1000, full duplex

Using eTSEC1 device

TFTP from server; our IP address is

Filename 'debug-core0.elf'.

Load address: 0x82000000

Loading: T T ###########

         13.7 KiB/s


Bytes transferred = 148367 (2438f hex)

=> bootelf

## Starting application at 0x8000027c ...

undefined instruction

pc : [<8000056c>]          lr : [<8000054c>]

sp : 9fffaf9c  ip : 00000004     fp : 9fffafec

r10: 800003ec  r9 : bef24eb4     r8 : 00000001

r7 : 00000000  r6 : bef25db4     r5 : 00000000  r4 : 9fffafd4

r3 : 9fffafd4  r2 : 8000d0dc     r1 : 8000d8f4  r0 : 8000d5a0

Flags: nZCv  IRQs off  FIQs off  Mode SVC_32

Resetting CPU ...



resetting ...