Stack Dumps

Introduction

If the ESP crashes the Exception Cause will be shown and the current stack will be dumped.

Example:

  1. Exception (0): epc1=0x402103f4 epc2=0x00000000 epc3=0x00000000 excvaddr=0x00000000 depc=0x00000000
  3. ctx: sys
  4. sp: 3ffffc10 end: 3fffffb0 offset: 01a0
  6. >>>stack>>>
  7. 3ffffdb0:  40223e00 3fff6f50 00000010 60000600
  8. 3ffffdc0:  00000001 4021f774 3fffc250 4000050c
  9. 3ffffdd0:  400043d5 00000030 00000016 ffffffff
  10. 3ffffde0:  400044ab 3fffc718 3ffffed0 08000000
  11. 3ffffdf0:  60000200 08000000 00000003 00000000
  12. 3ffffe00:  0000ffff 00000001 04000002 003fd000
  13. 3ffffe10:  3fff7188 000003fd 3fff2564 00000030
  14. 3ffffe20:  40101709 00000008 00000008 00000020
  15. 3ffffe30:  c1948db3 394c5e70 7f2060f2 c6ba0c87
  16. 3ffffe40:  3fff7058 00000001 40238d41 3fff6ff0
  17. 3ffffe50:  3fff6f50 00000010 60000600 00000020
  18. 3ffffe60:  402301a8 3fff7098 3fff7014 40238c77
  19. 3ffffe70:  4022fb6c 40230ebe 3fff1a5b 3fff6f00
  20. 3ffffe80:  3ffffec8 00000010 40231061 3fff0f90
  21. 3ffffe90:  3fff6848 3ffed0c0 60000600 3fff6ae0
  22. 3ffffea0:  3fff0f90 3fff0f90 3fff6848 3fff6d40
  23. 3ffffeb0:  3fff28e8 40101233 d634fe1a fffeffff
  24. 3ffffec0:  00000001 00000000 4022d5d6 3fff6848
  25. 3ffffed0:  00000002 4000410f 3fff2394 3fff6848
  26. 3ffffee0:  3fffc718 40004a3c 000003fd 3fff7188
  27. 3ffffef0:  3fffc718 40101510 00000378 3fff1a5b
  28. 3fffff00:  000003fd 4021d2e7 00000378 000003ff
  29. 3fffff10:  00001000 4021d37d 3fff2564 000003ff
  30. 3fffff20:  000003fd 60000600 003fd000 3fff2564
  31. 3fffff30:  ffffff00 55aa55aa 00000312 0000001c
  32. 3fffff40:  0000001c 0000008a 0000006d 000003ff
  33. 3fffff50:  4021d224 3ffecf90 00000000 3ffed0c0
  34. 3fffff60:  00000001 4021c2e9 00000003 3fff1238
  35. 3fffff70:  4021c071 3ffecf84 3ffecf30 0026a2b0
  36. 3fffff80:  4021c0b6 3fffdab0 00000000 3fffdcb0
  37. 3fffff90:  3ffecf40 3fffdab0 00000000 3fffdcc0
  38. 3fffffa0:  40000f49 40000f49 3fffdab0 40000f49
  39. <<<stack<<<

The first number after Exception gives the cause of the reset. a full list of all causes can be found here the hex after are the stack dump.

Decode

It’s possible to decode the Stack to readable information. For more info see the Esp Exception Decoder tool.

ESP Exception Decoder

ESP Exception Decoder