Hello.
Jason Wessel wrote:
> I rolled up several patches along with my changes to fix HW breakpoints
> on x86_64 and i386. I also deprecated some of the #defines in favor of
> using the kgdb_ops to control the HW breakpoints for other non IA archs
> at the point that these are implemented.
>
> Until such time that there is a common interface for kernel HW
> breakpoints, if a user space application uses HW breakpoints the kernel
> breakpoints will disappear. I tested execution, data access and data
> write breakpoints and all work with gdb 6.6.
> If there are no objections, I am going to replace the i386.patch with
> i386_hw_breakpoints.patch and x86_64_breakpoints.patch and merge the
> core changes for arch breakpoints to core-lite.patch.
Unfortunately, h/w watchpoints don't seem to work on x86_64. That's what
I'm getting with 2.6.21.5-rt10 and gdb 6.5.50:
(gdb) watch jiffies
Hardware watchpoint 2: jiffies
(gdb) c
Continuing.
warning: Could not remove hardware watchpoint 2.
Warning:
Could not insert hardware watchpoint 2.
Could not insert hardware breakpoints:
You may have requested too many hardware breakpoints/watchpoints.
WBR, Sergei
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