Debug Kernel - Overview


  • Accessible via serial cable or UDP (uni only)
  • MUST match the retail kernel level
  • Type "?" or ".?" or read the DBH!
  • SMP Considerations:
    • Current CPU is shown as p=xx in registers
    • .dsh shows history of IPCs
    • remember that SEL=1xxx (e.g. 1530) and some other variables are on a per-CPU basis.
  • See ftp.software.ibm.com/ps/products/os2/fixes/debug



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