On 04/16, Frederic Weisbecker wrote: > > On Sun, Apr 14, 2013 at 09:12:05PM +0200, Oleg Nesterov wrote: > > Looking at the bug report, it seems they only reproduced with a homemade > test. No real app has reported that issue?
iirc (Jan can correct me) gdb hit this problem, but it was already changed to change DR0 first. > > Jan, Frederic, et all. What do you think we should do? > > > > 1. Change ptrace_write_dr7() to do register_user_hw_breakpoint() > > if necessary. > > > > This is what I was going to do, but I am no longer sure > > we want this. For what? Unlikely it is very useful to use > > the "default" addr == 0 for debugging. > > So you mean assume that the addr is 0 in dr[0-3] if we write dr7 before > writing > the addr register? Yes, > Yes, I'm convinced that's the right direction! OK. Thanks Jan and Frederic. I'll send v2 tomorrow with the 3rd patch which adds _register into write_dr7. Plus another minor/offtopic fix I forgot to send. Oleg. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
