Messages in this thread | | | From | Mikael Pettersson <> | Date | Thu, 5 Dec 2002 15:33:12 +0100 | Subject | Re: is KERNEL developement finished, yet ??? |
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Shane Helms writes: > But, if you're implying that we can start once again from bottom, and come up > with something better that unix (which has been opensource, around for long > while, tested and developed by many as well) I _HIGHLY_ doubt, and disagree. >... > I doubt there be any such errors (mistakes) if ANY. but then, i'm not a kernel > developer, and new to this whole mailing list !!
Signal delivery on the current stack as opposed to a process-global or per-signal sigaltstack is broken as hell. It messes up user-space code that uses customised stack management methods.
sigaction() with SA_ONSTACK is unreliable because in reality applications have linked-in libraries, and those libraries have no standard way of knowing whether the main application wants SA_ONSTACK or not.
LD_PRELOAD:ing your own sigaction() is also unreliable, because C libs tend to have internal calls that bypass the external name and go directly to the internal __libc_sigaction() or whatever it happens to be called.
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