chirping78

xtensa: fix up_saveusercontext in interrupt context

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## Summary Currently, without the change, when assert in interrupt handler, it will show the registers are all zeros. This PR tries to save these registers. ## Impact ## Testing...

[HELP] disassemble output of xtensa gdb is not understandable

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### Description This might be an esp32 toolchain issue, but I don't know where to post bug report for it, so record it here first. After build a config such...