TOPS-10 Monitor Calls Manual Volume 2 AA-K039D ... - Trailing-Edge

CORE [CALLI 11]
22.16 CORE [CALLI 11]
FUNCTION
Allows your program to dynamically expand
allocat~on in either or both segments.
segments may be locked in core.
or contract its core
Note that neither of the
The program with JACCT privileges expands the
memory. A program without JACCT privileges
indicate physical addressing.
CALLING SEQUENCE
MOVE ac, [XWD hiseg,lowseg]
CORE ac,flag
error return
skip return
segment
must
in
use
physical
UU.PHY to
In the calling sequence, you can supply the following variables:
o hiseg is the highest relative address to be used in the
program's high segment. If hiseg = 0, the core assignment
for the high segment is left unchanged.
o lowseg is the highest relative address to be used in the
program's low segment. If lowseg = 0, the core assignment
for the low segment is left unchanged.
o
flag is the physical flag bit (UU.PHY) to indicate that the
core assignment applies to physical memory. Refer to the
CALLI UUO for more information.
Note that if the CORE UUO is executed in a non-zero section, all core
address arguments will be interpreted as section-relative values.
That is, all references are assumed to be relative to the current
section.
If you give a non-zero hiseg that is less than 400000 or the length of
the low segment (whichever is greater), the high segment is
eliminated. Doing this from the high segment causes an illegal memory
reference.
If your program has no high segment, or if you give a CORE call that
eliminates the high segment, you can create a new, non-sharable high
segment by giving hiseg greater than 400000. You can make the new
high segment sharable by doing the following:
o Giving it a .EXE extension.
o
o
Writing it onto a storage device.
Closing the file.
o Using the SSAVE monitor command, or the SAVE. UUO with the
SS%SSH flag, to save the entire core image.
o Initializing the program with a GET, R, or RUN monitor
command, or with a RUN, MERGE., or GETSEG monitor call.
If you use the CORE monitor call giving a value for lowseg that is
less than or equal to .JBREL, the monitor removes any noncontiguous
pages from your address space; these pages may include the page fault
handler (PFH) or VMDDT. To avoid this, use the PAGE. monitor call to
choose only the needed pages.
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