Date: Thu, 23 Apr 1998 17:10:01 -0700 (PDT) From: Fred Gilham <gilham@csl.sri.com> To: freebsd-bugs Subject: Re: kern/6389: Need to be able to access trap-to-signal mapping to for Linux emulation to allow Allegro Common Lisp (and maybe other apps) to run. Message-ID: <199804240010.RAA22153@hub.freebsd.org>
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The following reply was made to PR kern/6389; it has been noted by GNATS. From: Fred Gilham <gilham@csl.sri.com> To: Mike Smith <mike@smith.net.au> Cc: Eivind Eklund <eivind@yes.no>, freebsd-gnats-submit@FreeBSD.ORG Subject: Re: kern/6389: Need to be able to access trap-to-signal mapping to for Linux emulation to allow Allegro Common Lisp (and maybe other apps) to run. Date: Thu, 23 Apr 1998 17:01:47 -0700 Mike asked: >Just of curiosity, how does this handle the case where the traphandler >does: > > psignal(); > return; > >ie. never gets to the trapsignal() call? Note that the trap() function is basically broken into a user trap branch and a kernel trap branch. Your scenario would only happen in the kernel trap branch of the trap() function. I'd actually verified that just fixing what the T_PROTFLT case does in the user trap branch would make ACL work. So I was pretty sure I didn't need to worry about the kernel branch. However, that does somewhat limit the generality of the fix. But I don't know enough to know whether it's even desirable to translate things that happen in the kernel trap branch. I think someone who understands how the trap stuff works needs to review this change. -Fred To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the messagehelp
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