Messages in this thread | | | Date | Mon, 27 Jan 2014 18:39:31 +0100 | From | Oleg Nesterov <> | Subject | Re: [RFC] de-asmify the x86-64 system call slowpath |
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On 01/27, Al Viro wrote: > > BTW, there's an additional pile of obfuscation: > /* work to do on interrupt/exception return */ > #define _TIF_WORK_MASK \ > (0x0000FFFF & \ > ~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT| \ > _TIF_SINGLESTEP|_TIF_SECCOMP|_TIF_SYSCALL_EMU)) > > /* work to do on any return to user space */ > #define _TIF_ALLWORK_MASK \ > ((0x0000FFFF & ~_TIF_SECCOMP) | _TIF_SYSCALL_TRACEPOINT | \ > _TIF_NOHZ)
Heh, yes ;)
> Why is _TIF_UPROBE *not* a part > of _TIF_DO_NOTIFY_MASK, for example?
Yes, please see another email. That is why uprobe_deny_signal() sets TIF_NOTIFY_RESUME along with TIF_UPROBE.
Oleg.
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