HP 3000 Manuals HP 3000 Manuals
func nmbpinstr
Returns the original NM instruction at a specified NM code address where
a NM breakpoint has been set.
Syntax
nmbpinstr (virtaddr [pin])
This function accepts the address of an existing NM breakpoint and
returns the instruction associated with that breakpoint. The default
action is to look for breakpoints set by the current PIN. Breakpoint
indices for other PINs (including the global PIN) may be retrieved by
using the optional pin parameter.
Formal Declaration
nmbpinstr:s32 (virtaddr:ptr [pin:s16=0])
Parameters
virtaddr The address of an NM breakpoint at which the stored
instruction is to be returned.
Virtaddr can be a short pointer, a long pointer, or a
full logical code pointer.
pin Look for breakpoints set by this PIN. Default is the
caller's PIN (a pin of 0 implies this). To specify
system (global) breakpoints, use a -1 (or 32762) as the
PIN.
Examples
$nmdebug > dc FOPEN,1
SYS $a.4b9130
004b9130 FOPEN 6bc23fd9 STW 2,-20(0,30)
Display code at the address of FOPEN so we can see what the current
instruction is at that address.
$nmdebug > b FOPEN
added: NM [1] SYS $a.004b9130 FOPEN
$nmdebug > dc FOPEN,1
SYS $a.4b9130
004b9130 FOPEN 0000400e BREAK (nmdebug bp)
Now set a breakpoint at FOPEN and display the code there. The old
instruction has been replaced with a breakpoint instruction.
$nmdebug > wl nmbpinstr(FOPEN)
$6bc23fd09
Use the function to look up the actual instruction. The instruction that
is stored in the system breakpoint table is returned by the function.
Limitations, Restrictions
none