[U-Boot-Users] Stack pointer corruption on 8541 - short version.

Jerry Van Baren gerald.vanbaren at smiths-aerospace.com
Wed Jan 17 14:06:22 CET 2007

> On 1/15/07, Michael <michaelzwrk at gmail.com> wrote:
>> Hi all.
>> I posted a mail describing a problem I have with stack pointer on a
>> board with MPC8541.
>> I figured out I gave a complicated description for a simple problem,
>> so here it is rephrased:
>> I get the stack pointer corrupted when returning from function call on
>> the first functions (running in flash, L1 cache used for stack).
>> for example, in start.S:
>> bl foo1(), when foo1() is:
>> void foo1()
>> {
>>  foo2();
>> }
>> void foo2()
>> {
>>  foo3();
>> }
>> The return address from foo2() is some random crap.
>> Any ideas what could be the reason?
>> Thanks,
>>   Michael
> Michael wrote:
> Seems like I found the cause of the problem - it was the JTAG I use.
> It somehow corrupts the stack pointer in L1D cache. Running without
> the JTAG, or alternatively relocating the stack pointer to SRAM,
> results in normal execution.

And the JTAG unit manufacture/model is?????  Forewarned is forearmed.


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