HP 3000 Manuals

System Debug Reference Manual

func hash 

Hashes a virtual address into a hash table (real) offset.

Syntax 

      hash (virtaddr)

The hash value can be added to the Hash table base real address (TR1) to
determine the real offset to the first PDIR entry.

Formal Declaration 

      hash:s32 (virtaddr:ptr)

Parameters 

 virtaddr        The virtual address that is to be hashed.

                 Virtaddr can be a short pointer, a long pointer, or a
                 full logical code pointer.

Examples 

     nmdat > wl pc 
     SYS $a.d87f8

     nmdat > wl hash(pc) 
     $103c4

     nmdat > dz tr1+hash(pc) 
     REAL $103c4    $ 00001b00

     nmdat > dz tr0+1b00,4 
     REAL $0061dd00 $ 80000000 0000000a 000d8000 82800000

Hash the virtual address for PC ($a.d87f8) to get real address $103c4.
Add the hash value ($103c4) to the base of the Hash table (TR1) to get
the offset of the first PDIR entry ($1b00).  Add this offset to the base
of the PDIR table (TR0), and display the four-word PDIR entry.

Limitations, Restrictions 

none

MPE/iX 5.0 Documentation