@FioraAeterna Why does anyone care about SYSENTER being 2 vs 15 cycles when kernel entry/exit overhead is 500-1000 cycles? :-(
@SamuelAFalvoII @FioraAeterna Signal handlers only need to faithfully save registers when interrupting asynchronously. This is impl detail.
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@RichFelker@FioraAeterna I believe POSIX signal handlers are specified to be asynchronous. -
@SamuelAFalvoII@FioraAeterna Yes and no; too subtle for 140 chars. But _when_ they trigger at a syscall, there's nothing to save.
End of conversation
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