> Regarding the handling of space registers during interruptions, they > are not saved. syscall_exit_rfi restores them to proper values: This is potentially an implementation bug, particularly with respect to interruptions. User space probably should have sr0-sr3 available to do icache flushes, etc. Currently, gcc uses sr0 for icache flushes. It may be sr0 is never clobbered, but this isn't clear. I'm fairly sure HP-UX saves sr0-sr4 if necessary. Possibly, the icache flush sequence should be changed for linux to not use sr0. Dave -- J. David Anglin dave.anglin@xxxxxxxxxxxxxx National Research Council of Canada (613) 990-0752 (FAX: 952-6602) -- To unsubscribe from this list: send the line "unsubscribe linux-parisc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
