HP 3000 Manuals HP 3000 Manuals
func cmstart
Returns the starting point of the procedure containing the indicated CM
logical code address.
Syntax
cmstart (cmlogaddr)
Start addresses correspond to the CODE column in the PMAP generated by
the Segmenter. Refer to the CM program example below.
Formal Declaration
cmstart:lcptr (cmlogaddr:lcptr)
Parameters
cmlogaddr A CM logical code pointer address for which the starting
address of the containing level one procedure is to be
returned.
Cmlogaddr must be a full CM logical code address
(LCPTR). For example:
CMPC Current CM program counter
CMPW+4 Top of CM program window + 4
PROG(2.102) Program file logical seg 2 offset
102
fopen+102 CM procedure fopen + %102 (assumes
CM mode)
cmaddr('fopen')+%102 CM procedure fopen + %102 (NM or
CM mode)
Examples
Assume that the following single segment CM program has been compiled,
linked with the PMAP and FPMAP options, and is now being executed:
PROGRAM test (input,output);
PROCEDURE one;
begin {one}
writeln('ONE');
end; {one}
PROCEDURE two;
PROCEDURE three;
begin {three}
writeln('THREE');
end; {three}
begin {two}
writeln('TWO');
three;
end; {two}
begin {main body} { Outer block is named "ob'" by the compiler }
one;
two;
end. {main body}
PROGRAM FILE PTEST.DEMO.TELESUP
SEG' 0
NAME STT CODE ENTRY SEG
OB' 1 0 13
TERMINATE' 5 ?
P'RESET 6 ?
P'REWRITE 7 ?
P'CLOSEIO 10 ?
P'INITHEAP'3000 11 ?
TWO 2 71 123
P'WRITELN 12 ?
P'WRITESTR 13 ?
ONE 3 142 155
SEGMENT LENGTH 210
PRIMARY DB 2 INITIAL STACK 10240 CAPABILITY 600
SECONDARY DB 430 INITIAL DL 0 TOTAL CODE 210
TOTAL DB 432 MAXIMUM DATA ? TOTAL RECORDS 11
ELAPSED TIME 00:00:01.365 PROCESSOR TIME 00:00.740
END OF PREPARE
%cmdebug > wl ob'
PROG %0.0
%cmdebug > wl cmstart(ob')
PROG %0.0
Two methods of displaying the start address of the procedure ob'.
%cmdebug > wl ?ob'
PROG %0.13
%cmdebug > wl cmentry(ob')
PROG %0.13
Two methods of displaying the entry address of the procedure ob'.
%cmdebug > wl cmstart(one)
PROG %0.142
%cmdebug > wl cmentry(one)
PROG %0.155
%cmdebug > wl cmentry(one+10)
PROG %0.155
%cmdebug > wl cmstart(two)
PROG %0.71
%cmdebug > wl cmstart(two+5)
PROG %0.71
%cmdebug > wl cmentry(two)
PROG %0.123
Limitations, Restrictions
The names and addresses of nested CM procedures, such as procedure three,
are not available within the CM FPMAP records. Addresses that fall
within nested procedures (three) are returned as offsets relative to the
parent procedure (two).