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
