On Fri, 1 Aug 2003, Julian Elischer wrote: > > > On Fri, 1 Aug 2003, Daniel Eischen wrote: > > > On Fri, 1 Aug 2003, Thorsten Greiner wrote: > > > > > * Thorsten Greiner <thorsten.greiner_at_web.de> [2003-08-01 23:47]: > > > > I will test wether the problem still occurs with version 1.84 of > > > > sys_machdep.c and let you know. > > > > > > Yup, reverting to 1.84 unbreaks this for me. Looking at the changes > > > made it appears to me that the check > > > > > > if (uap->start < NLDT || uap->num <= 0) > > > return (EINVAL);i > > > > > > causes this, because NLDT is 6 and the NVidia stuff passes > > > uap->start == 6 to this call. > > > > It can't use 6. FreeBSD reserves 0-16 for its own use. > > > > I think the bug was in the old code allowing this to > > happen... > > Looking at segments.h..... > /* > * Entries in the Local Descriptor Table (LDT) > */ > #define LSYS5CALLS_SEL 0 /* forced by intel BCS */ > #define LSYS5SIGR_SEL 1 > #define L43BSDCALLS_SEL 2 /* notyet */ > #define LUCODE_SEL 3 > #define LSOL26CALLS_SEL 4 /* Solaris >= 2.6 system call gate */ > #define LUDATA_SEL 5 > /* separate stack, es,fs,gs sels ? */ > /* #define LPOSIXCALLS_SEL 5*/ /* notyet */ > #define LBSDICALLS_SEL 16 /* BSDI system call gate */ > #define NLDT (LBSDICALLS_SEL + 1) > > it looks like NLDT should be save between from 6 to 15 > (though I wish they'd chosen a different value) > > so we could add: I might add that this si slightly bogus as you an't have aproces being a BSDI binary and a SOLARIS binary and a BCS binary all at the same time, and we don't set any values on most (any?) of these segments for FreeBSD binaries.. > > if ((uap->start == LBSDICALLS_SEL) || (uap->start <= LUDATA_SEL)) || > (uap->num <= 0)) > ... > > What do you think? > > > > > -- > > Dan Eischen > > > > > > _______________________________________________ > freebsd-current_at_freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe_at_freebsd.org" >Received on Fri Aug 01 2003 - 13:25:24 UTC
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