gdbserver signals interfere with {next,step{,i}}

[Jon Ringle <jon@ringle.org>]

Hello,

I have an application that uses SIGUSR1 to receive timer interrupts. 
I've done 'handle SIGUSR1 nostop noprint' to avoid gdb from stopping on 
SIGUSR1.
I've found that when debugging this application using gdbserver, that I 
can't use next, nexti, step, or stepi. When I use one of these commands, 
the application usually just continues without stopping at the next 
line/instruction.

If I use a native gdb on the target the problem does not occur.
If I disable my app from generating the SIGUSR1 and use gdbserver, the 
problem also goes away.

I am using gdb-6.6 for gdbserver, native gdb and cross gdb.

Jon