Display of read/access watchpoints when HAVE_NONSTEPPABLE_WATCHPOINT

[Orjan Friberg <orjan dot friberg at axis dot com>]

Hi all,

I'm working on a gdb port for a remote target that has hardware 
watchpoint support.  I have defined HAVE_NONSTEPPABLE_WATCHPOINT, to 
make gdb disable the watchpoint and single-step over it when it's hit. 
The basic stuff works fine; the problem I have is the displaying of "Old 
value/New value" when a read or access watchpoint is hit.  (Normal write 
watchpoints are displayed correctly.)

The problem seems to be that target_stopped_data_address () is called in 
bp_stop_status () *after* the single-step over the disabled breakpoint 
has been carried out, at which point the target is no longer stopped due 
to a hardware watchpoint (but due to the single-step).  Consequently, 
target_stopped_data_address () returns 0, and gdb thinks that the 
watchpoint didn't hit.  I can't see that any other targets keep the last 
"stopped data address" until the next hardware watchpoint is hit (which 
would make the address still available after the single-step).

Any suggestions as to what I might have missed, or any insight in how 
it's supposed to work would be appreciated.

Thanks,
Orjan

--
Orjan Friberg
Axis Communications