RTEMS | Draft: testsuites/validation: Take the interrupted stack on MicroBlaze (!1462)

[Sam Price (@TheSamPrice)]

Sam Price created a merge request: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1462

Project:Branches: TheSamPrice/rtems:tm27-mb-update-rebased to rtems/rtos/rtems:main
Author:   Sam Price



## Summary

testsuites/validation: Take the interrupted stack on MicroBlaze

The MicroBlaze ISR prologue switches to the per-CPU interrupt stack and
saves the stack pointer of the interrupted thread at the start of the
interrupt frame.  The wrapper captured r1 directly, so it recorded the
interrupt stack pointer instead of the stack pointer of the interrupted
thread and ScoreIsrValIsr checked the wrong stack range.

Recover the saved stack pointer from the interrupt frame when the
wrapper runs on the interrupt stack.

Signed-off by: Sam Price
Assisted-By: Claude Opus 5 (1M context) <noreply at anthropic.com>


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View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1462
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