[U-Boot-Users] Hello World application - Resets the CPU

[U-Boot-Users] Hello World application - Resets the CPU

[Swapnil Ashok Narkhede]

I am working on pxa255 processor on Accelent board.
Being ARM architecture, i downloaded the hello_world.bin
using TFTP at 0x0c100000. The entry point is also same for
ARM.But when i try to execute
$ go 0x0c100000 Hello World! This is a test.
i get the following output 
>## Starting application at 0x0C100000 
>pc : [<0c140388>]    lr : [<a30077cc>]
>sp : a2f9fe40  ip : ffffffff  fp : 00000000
>r10: 00000000  r9 : 00000000  r8 : a2f9ffdc
>r7 : 00000000  r6 : 00000007  r5 : a2fe02e4  r4 : 0c100000
>r3 : 40100000  r2 : 00000001  r1 : a2fe02e4  r0 : e59ff014
>Flags: nZCv  IRQs off  FIQs off  Mode SVC_32
>Resetting CPU ...
>
>resetting ...
and the cpu resets.
Please guide me what could be the reason for this.

2>Sorry for being stupid in previous posts. But,
where do i find the Netiquette for this mailing list.

Regards,
Swapnil Narkhede
Mob:- 0432025023
Email:- s3092131 at student.rmit.edu.au
School of Computer Science and Information Technology
RMIT University, Melbourne

[U-Boot-Users] Hello World application - Resets the CPU

[Andreas Schweigstill]

Dear Swapnil!

Swapnil Ashok Narkhede schrieb:
 >>## Starting application at 0x0C100000
 >>pc : [<0c140388>]    lr : [<a30077cc>]
 >>sp : a2f9fe40  ip : ffffffff  fp : 00000000
 >>r10: 00000000  r9 : 00000000  r8 : a2f9ffdc
 >>r7 : 00000000  r6 : 00000007  r5 : a2fe02e4  r4 : 0c100000
 >>r3 : 40100000  r2 : 00000001  r1 : a2fe02e4  r0 : e59ff014
 >>Flags: nZCv  IRQs off  FIQs off  Mode SVC_32

The contents of several registers don't look like typical data
pattern but like ARM instructions. These could either be there
from the copy operations or from improper initialisation of the
stacks or C runtime library. Especially R0 looks like code but
LR can be code, too. LR should always contain an address of
valid code memory; otherwise it really look like a stack
corruption. So please check your stack initialisation and sizes.

And you are aware that variables with function scope are being put
on the stack and not on the heap, are you?

I recommend picking a proper JTAG debugger and steps through your
initialisation code.

With best regards
Andreas Schweigstill

-- 
Dipl.-Phys. Andreas Schweigstill
Schweigstill IT | Embedded Systems
Schauenburgerstra?e 116, D-24118 Kiel, Germany
Phone: (+49) 431 5606-435, Fax: (+49) 431 5606-436
Mobile: (+49) 171 6921973, Web: http://www.schweigstill.de/

[U-Boot-Users] Hello World application - Resets the CPU

[Sam Song]

> Swapnil Ashok Narkhede schrieb:
>  >>## Starting application at 0x0C100000

Before a further debug, pls try "go c100004" first to
see
what would happen:-)

Regards,

Sam


	

	
		
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