RE: hbreak reads memory

["Breazeal, Don" <Don_Breazeal@mentor.com>]

Adrian,
I think this is due to some function prologue analysis.  You might try setting the breakpoint on an address, e.g. instead of 'hbreak foo' use 'hbreak *foo'.  The breakpoint should then be on the address of the entry point to the function and the memory accesses may be reduced or eliminated.

You might also try 'set trust-readonly-sections' and/or set mem inaccessible-by-default.  Those may or may not help.
--Don

> -----Original Message-----
> From: gdb-owner@sourceware.org [mailto:gdb-owner@sourceware.org] On
> Behalf Of Alexandru-Adrian Oltean
> Sent: Tuesday, July 26, 2016 11:29 PM
> To: gdb@sourceware.org
> Subject: hbreak reads memory
> 
> Hi everyone,
> 
> I noticed that setting a hardware break using hbreak will trigger a
> memory access at the address where the breakpoint is supposed to be
> installed. Can someone explain why is that memory access needed? I'm
> thinking that we might be in a situation where that memory area is not
> yet initialized/accessible (maybe MMU not configured yet) and the
> access corrupts the debugged target.
> 
> Thanks,
> Adrian