Justin R. Bendich wrote:
10. Invoke XDC via its SVC HOOK.
Walt Farrell wrote:
but have you considered the possibility that step 10 takes you out
of subspace mode until you return from the SVC?
I write:
I know it's not clear from the posts, but... XDC does not run within
an SVC. The SVC, when reached by execution, establishes a
caller-owned ESTAE with XDC as the exit routine. It (the SVC) then
sets a trap (an X'00' opcode which will cause an 0C1) at the caller's
resume address. Finally, the SVC terminates back to the caller (the
user code) so that the trap get's immediately executed.
So the environment within which XDC runs is a simple ESTAE
environment for the code being debugged. The SVC is long gone.
But what effect this might have on the STCBSST flag, I do not know.
Dave Cole REPLY TO: [email protected]
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