On Sun, Mar 29, 2009 at 11:01 PM, Jeremy Fitzhardinge <jeremy@xxxxxxxx> wrote:
Bryan Donlan wrote:
Using 2.6.29 or 2.6.28 as a 64-bit Xen domU, a number of ptrace()It looks like this is because the kernel sets up int3 (breakpoint) and debug
users seem to have issues with unexpected breakpoints. ltrace and gdb
both seem to be affected, under both 64-bit and 32-bit userspace.
32-bit kernels do not seem to be affected. Typical symptoms look like:
(watchpoints, etc) to be on a separate debug stack in the tss. Xen doesn't
do this (and doesn't appear to have a mechanism to do so), so I guess the
on-stack format isn't what the kernel expects. Does the patch below work?
Hi,
Sorry for the late reply; this message never made it to my inbox for
some reason...
I did try the patch, and saw similar results to Mark; ptrace works,
but lots of warnings: