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Debug only Unfreezes a code segment, data segment, or virtual address (range) in memory. Syntax | |
UFC logaddr [bytelength] Program file
UFCG logaddr [bytelength] Group library
UFCP logaddr [bytelength] Account library
UFCLG logaddr Logon group library
UFCLP logaddr Logon account library
UFCS logaddr [bytelength] System library
UFCU fname logaddr [bytelength] User library
UFCA cmabsaddr Absolute CST
UFCAX cmabsaddr Absolute CSTX
UFDA dst.off CM data segment
UFVA virtaddr [bytelength] Virtual address
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These unfreeze commands actually decrement a system freeze count.
The segment or pages may remain frozen if their freeze count is still positive. Parameters | |
- logaddr
A full logical code address (LCPTR) specifies three necessary items: The logical code file (PROG, GRP, SYS, and so on). NM: the virtual space ID number (SID). CM: the logical segment number. NM: the virtual byte offset within the space. CM: the word offset within the code segment.
Logical code addresses can be specified in various levels of detail: As a full logical code pointer (LCPTR): - UFC procname+20
Procedure name lookups return LCPTRs. - UFC pw+4
Predefined ENV variables of type LCPTR. - UFC SYS(2.200)
Explicit coercion to a LCPTR type.
As a long pointer (LPTR): - UFC 23.2644
sid.offset or seg.offset
The logical file is determined based on the command suffix. For example: UFCS implies SYS, and so on.
As a short pointer (SPTR):
For NM, the short pointer offset is converted to a long pointer using the function STOLOG, which looks up the SID of the loaded logical file. This is different from the standard short to long pointer conversion, STOL, which is based on the current space registers (SRs). For CM, the current executing logical segment number and the current executing logical file are used to build a LCPTR. The search path used for procedure name lookups is based on the
command suffix letter: - UFC
Full search path: NM: PROG, GRP, PUB, USER(s), SYS. CM: PROG, GRP, PUB, LGRP, LPUB, SYS.
- UFCG
Search GRP, the group library. - UFCP
Search PUB, the account library. - UFCLG
Search LGRP, the logon group library. - UFCLP
Search LPUB, the logon account library. - UFCS
Search SYS, the system library. - UFCU
Search USER, the user library.
For a full description of logical code addresses, refer to the section
"Logical Code Addresses" in chapter 2. - fname
The file name of the NM USER library. Multiple NM libraries can be bound with the XL= option on a RUN command, for example:
:run nmprog; xl=lib1,lib2.testgrp,lib3
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In this case, it is necessary to specify the desired NM USER library, for example:
UFCU lib1 204c
UFCU lib2.testgrp test20+1c0
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If the file name is not fully qualified, the following defaults are used: Default account: the account of the program file. Default group: the group of the program file.
- cmabsaddr
A full CM absolute code address specifies three necessary items: Either the CST or the CSTX. The absolute code segment number. The CM word offset within the code segment.
Absolute code addresses can be specified in two ways: As a long pointer (LPTR): - UC 2644
Implicit CST 23.2644 - UCAX 5.3204
Implicit CSTX 5.3204
As a full absolute code pointer (ACPTR): - UCA CST(2.200)
Explicit CST coercion. - UCAX CSTX(2.200)
Explicit CSTX coercion. - UCAX logtoabs(prog(1.20))
Explicit absolute conversion.
The search path used for procedure name lookups is based on the
command suffix letter: - UCA
GRP, PUB, LGRP, LPUB, SYS - UCAX
PROG
- dst.off
A data segment address (specified as dst.offset) of the data segment to be unfrozen in memory (see the FDA command). - virtaddr
The starting virtual address of the page(s) that are to be
unfrozen in memory. (Refer to the FVA command.) Virtaddr can be a short pointer, a long pointer, or a full logical code pointer. - bytelength
This parameter is valid only for nmdebug. It is the
desired number of bytes to be
unfrozen. Based on the starting virtual
address and the specified bytelength, the appropriate number of virtual pages are unfrozen. If omitted, four bytes is used as a default. The implementation of this command dictates that the smallest unit that is actually frozen is one page of virtual memory. That is, if you say one byte, the whole page on which that byte resides is made resident.
Examples | |
Unfreeze CM logical code segment SYS %12.
$nmdebug > ufva 22.104, 1000
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Unfreeze 1000 bytes starting at virtual address 22.104. |
