Function argument no longer in register

[Orjan Friberg <orjan.friberg@axis.com>]

Hi all,

What should happen when a function argument goes out of scope because 
the register used to pass it is now used for something else?  I 
encountered the following situation:

foo (char *str)
{
   ...
   i = bar ();
   ...
}

The str argument is passed in register r10, which is then overwritten 
with the return value from bar.  If I stop somewhere after the call to 
bar and try to "print str", GDB will try to read from the address 
pointed out by r10 (i.e. sends an 'm' packet to the remote stub).

I don't know what kind of problem I'm looking at here.  Could it be that 
the debug information is wrong?  I'm guessing GDB somehow fails to 
realize that the function argument is out of scope at this point.

-- 
Orjan Friberg
Axis Communications