Stan Sieler ([log in to unmask]) wrote:
: R26 is 0 (NIL)
: >  RCTR=00000000 ISR=00000208 IOR=0000000c IIR=0f581059 IVA=00d67000
: The IIR (Interrupt Instruction Register) has the opcode for
:    LDHS     12(0,26),25

: So, the code is trying to load at address 12 bytes in from NIL, which
: generally isn't desirable.

Unless you are running at ring 0, you can't dereference the first page.
(Unless this has changed in 5 years.)

: because you'd generally see the error *storing* relative to NIL, not loading
: from it.
: Stan Sieler                                          [log in to unmask]

This is the default on HP-UX, linking without -z.