Breakpoints

[David Williams]

Being a 68K core it can single step (at assembly level) using trace 
interrupt facility of the core. Ie the CPU hardware does the single 
stepping. I was more concerned  in the case when stepping at the source 
code level (c source in my case) that GDB may have to set more than one 
breakpoint.

Dave.

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From: 	Kevin Buettner[SMTP:kevinb@cygnus.com]
Sent: 	Wednesday, December 22, 1999 2:53 PM
To: 	davidwilliams@ozemail.com.au; 'gdb mail list'
Subject: 	Re: Breakpoints

On Dec 22,  2:29pm, David Williams wrote:

> Does GDB ever need to set more than one breakpoint when stepping through
> source code? I have not (as yet) seen this type of behaviour.

Can the target do a singlestep in hardware or do you have to do
software emulation?  If the latter, when you're stepping by machine
instruction, you'd need two breakpoints on a conditional branch;
one for the branch target, the other for the instruction after the
branch.

Kevin