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panic handler: Print correct PC & backtrace for debug exceptions

This commit is contained in:
Angus Gratton 2017-10-23 15:46:43 +08:00 committed by Angus Gratton
parent 22756b6c02
commit c61060e673
1 changed files with 7 additions and 1 deletions
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8
components/freertos/xtensa_vector_defaults.S
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@ -34,8 +34,14 @@ The default behaviour is to just exit the interrupt or call the panic handler on
_xt_debugexception:
movi a0,PANIC_RSN_DEBUGEXCEPTION
wsr a0,EXCCAUSE
/* _xt_panic assumes a level 1 exception. As we're
crashing anyhow, copy EPC & EXCSAVE from DEBUGLEVEL
to level 1. */
rsr a0,(EPC + XCHAL_DEBUGLEVEL)
wsr a0,EPC_1
rsr a0,(EXCSAVE + XCHAL_DEBUGLEVEL)
wsr a0,EXCSAVE_1
call0 _xt_panic /* does not return */
rsr a0, EXCSAVE+XCHAL_DEBUGLEVEL
rfi XCHAL_DEBUGLEVEL
#endif /* Debug exception */