Date: Sun, 30 Jul 2006 21:34:12 +1000 From: Peter Jeremy <peterjeremy@optushome.com.au> To: Divacky Roman <xdivac02@stud.fit.vutbr.cz> Cc: hackers@freebsd.org Subject: Re: VM question related to faults Message-ID: <20060730113411.GC1310@turion.vk2pj.dyndns.org> In-Reply-To: <20060730105731.GA64955@stud.fit.vutbr.cz> References: <20060730105731.GA64955@stud.fit.vutbr.cz>
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[-- Attachment #1 --] On Sun, 2006-Jul-30 12:57:32 +0200, Divacky Roman wrote: >while working on SoC linuxolator project I am in a need of this: > >I need to do some operation on memory like mem1 = mem1 + mem2 etc. >where the mem1/mem2 access can trigger fault. (memory not mapped or something) This is normally only an issue for accesses to userland memory, where it is solved by fetch(9) and store(9). If you need to deal with KVM addresses that may be unmapped, then all I can suggest is looking at the implementations of the above functions. -- Peter Jeremy [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (FreeBSD) iD8DBQFEzJkz/opHv/APuIcRAlJLAJ9RbU4KpfkGp/AuU306sEzOtOfWmgCePBrV pJcrsVu6VDQ//QzoC+mDHAY= =kz+b -----END PGP SIGNATURE-----
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