instruction access exception

[Joel Sherrill]

Ingolf Steinbach wrote:
> Hi,
>
> 2007/4/13, hwulf at et-inf.fho-emden.de <hwulf at et-inf.fho-emden.de>:
>   
>> Now, when I start the program with #define DEBUG, the program stops at
>> an irregular instruction and the following lines are printed to the
>> console:
>>
>> Unexpected trap <0x01> at address 0xd0142300c
>> instruction access exception
>>     
>
> Just a wild guess: Could this be caused by the bug discussed
> recently which leads to stack overflows when interrupts
> occur too frequently?
>
> If the program uses printf() (or any other output to stdout)
> extensively, the UART will probably generate a high interrupt
> load and might trigger a stack overflow.
>
>   
The SPARC fix is attached to PR1237 and committed to the 4.6
and 4.7 branches as well as the CVS head.
> Cheers
> Ingolf
>
> [resent due to legal concerns]
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