Date: Fri, 3 Apr 1998 11:27:37 -0500 From: sbabkin@dcn.att.com To: karpen@ocean.campus.luth.se, nate@mt.sri.com Cc: marquard@zilker.net, freebsd-hackers@FreeBSD.ORG Subject: RE: bcopy implementation Message-ID: <C50B6FBA632FD111AF0F0000C0AD71EEACDE91@dcn71.dcn.att.com>
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> ---------- > From: Nate Williams[SMTP:nate@mt.sri.com] > > People seem to be forgetting that since bcopy isn't a system call, > it's > possible to royally screw yourself up with it, since it uses the FP > registers. > > So, one program could be in the middle of doing a bcopy, and a second > program could interrupt it, and spam the registers of the previous > program, so that when the first was resume it's results are totally > bogus. > Huh ? The floating point registers must be saved as part of context or else no program using them will work properly. Serge Babkin To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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