typedef struc uDB {
  ulong Pid;            /* Debuggee Process id          */
  ulong Tid;            /* Debuggee Thread id           */
  long  Cmd;            /* Command or Notification      */
  long  Value;          /* Generic Data Value           */
  ulong Addr;           /* Debuggee Address             */
  ulong Buffer;         /* Debugger Buffer Address      */
  ulong Len;            /* Length of Range              */
  ulong Index;          /* Generic Identifier Index     */
  ulong MTE;            /* Module Table Entry Handle    */
  ulong ctr;            /* Count register               */
  ulong lr;             /* Link register                */
  ulong xer;            /* Integer Exception register   */
  ulong msr;            /* Machine State Register       */
  ulong cr;             /* Condition Register           */
  ulong iar;            /* Instruction pointer          */
  ulong GP_REGS[32];    /* General Purpose registers    */
} uDB_t