z/VM: CP Commands and Utilities Reference - z/VM - IBM

TRACE STORE (ESA/390, z/Architecture)
Responses
1650 z/VM: CP Commands and Utilities Reference
examined by use of the QUERY TRACE command—that is, you specify an
address space based on the state of your virtual machine at the time of the
TRACE command that establishes the trace trap.
A trace trap generated with a specific address space specification (STO) always
identifies that address space using the STO generated from the control registers
and/or translation tables. If your program execution changes the control register
values and translation table contents to represent a different address space
structure, there is no change to the trace traps. The trace traps remain in effect
with the address space specified at the time of the TRACE command execution.
4. When the operand ALEThexword.ALraddr is used, the primary list bit in the
ALET is ignored. This bit chooses between access lists when the access list is
not explicitly specified.
5. The operands PRI, SECO, HOME, ASTEraddr, STDhexword, ASNasn,
AREGareg, ALEThexword, and ALEThexword.ALraddr use one or more of the
access register translation (ART), ASN translation, and dynamic address
translation (DAT) processes. These contain special case translation processes:
v ALET X'00000000' always indicates the current primary address space
designated by the STD in guest control register 1, regardless of the current
contents of the dispatchable unit access list.
v ALET 1 always indicates the current secondary address space designated by
the STD in guest control register 7, regardless of the current contents of the
dispatchable unit access list.
v Access register 0 is always treated as containing ALET X'00000000'. The
contents of access register 0 are not used during ART processing.
6. A traced address space is identified by its segment table origin (STO). The STD
operand is provided for consistency with the DISPLAY, DUMP, and STORE
commands. The STO is extracted from the STD provided, and all other STD
fields are ignored.
7. If a guest specifies an address space option from which an ASN can be derived,
then trace will trap events in all subspaces which are members of the group
identified by the ASN whenever possible.
An ASN can be derived from the following address space options.
v PRI
v SECO
v ASN
v AREG0
v AREGx , where the ALET in ARx is zero or one
v ALETn , where n is zero or one
8. For more information, see “Usage Notes” on page 1601.
For response information, see “TRACE: Command Responses” on page 1610.