Re: ptrace single-stepping change breaks Wine

Eric Pouech
2004-11-19T19:00:09Z

Roland McGrath a écrit :
>>No, TIF_SINGLESTEP gets set even when the _user_ set TF. It is just a flag
>>saying that we should re-enable TF when we get back to user space.
>>
>>So TIF_SINGLESTEP in no way implies that TF was set by a debugger.
>
>
> Ok, whatever. I'm not really sure its use for the single-step stuff in
> Davide Libenzi's changes doesn't change the expected behavior for the
> nondebugger case, but it's too early in the morning to think hard about that.
>
> Your change hit only one spot of three in arch/i386/kernel/signal.c where
> PT_PTRACED is now tested and it should be a "is PTRACE_SINGLESTEP in effect?"
> test. Also the same spots in native and 32-bit emul for x86-64.
>
>
> Thanks,
> Roland
>
the first patch put in BK by Linus doesn't fix the problem. Any plan to fix the
two other spots Roland mentionned ?
A+