Date: Mon, 14 Aug 2006 19:47:29 +0600 From: Stanislav Sedov <ssedov@mbsd.msk.ru> To: John Baldwin <jhb@freebsd.org> Cc: freebsd-hackers@freebsd.org Subject: Re: exception handling in kernel code Message-ID: <20060814194729.436fc453@localhost> In-Reply-To: <200608140932.57875.jhb@freebsd.org> References: <20060814124658.1d416cbe@localhost> <200608140932.57875.jhb@freebsd.org>
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[-- Attachment #1 --] On Mon, 14 Aug 2006 09:32:57 -0400 John Baldwin <jhb@freebsd.org> mentioned: > > You can make use of pcb_onfault to recover from a page fault, but that's > about it. Kernel code is expected to not generate exceptions. :) > Thanks a lot! I'll try it. To clarify: I've implemented driver to allow user-level code to read MSRs (Model specific registers) (like linux's /dev/cpu/msr). It's required for some programs like x86info. As long as not all MSRs documented and reading/writing unexistent MSR leads to GP fault, I need to recover in that case. -- Stanislav Sedov MBSD labs, Inc. <ssedov@mbsd.msk.ru> Россия, Москва http://mbsd.msk.ru -------------------------------------------------------------------- If the facts don't fit the theory, change the facts. -- A. Einstein -------------------------------------------------------------------- PGP fingerprint: F21E D6CC 5626 9609 6CE2 A385 2BF5 5993 EB26 9581 [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.3 (FreeBSD) iD8DBQFE4H7yK/VZk+smlYERAuGmAJ9uqkIjcl1Ez/wxO7KjY6KZyxzN4gCeNgbI B/Ef4ghJlt4dcm014Z76gXE= =ztsz -----END PGP SIGNATURE-----help
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