On Tue, Nov 25, 2008 at 06:55:21PM +0100, Max Laier wrote: > On Tuesday 25 November 2008 18:37:50 Alexej Sokolov wrote: > > Hello, > > could anyone please explain to me the difference between functions: > > copystr() and copyinstr() ? > > > > For i386 copyinstr is implemented in assembler. I can not read > > the assembler code very well. > > > > I tried to allocate a memory in space of user process using vm_map_find > > and then with copystr() I could copy data between user and kernel > > memory. copystr() seemed to be able to do the same what copyinstr do. > > You might get lucky with copystr() if the user page is already resident, but > if you page fault copystr() will kill the kernel. copyinstr() handles page > faults. Thanks a lot! I was lucky because I wired allocated pages before.
> > -- > /"\ Best regards, | [EMAIL PROTECTED] > \ / Max Laier | ICQ #67774661 > X http://pf4freebsd.love2party.net/ | [EMAIL PROTECTED] > / \ ASCII Ribbon Campaign | Against HTML Mail and News -- Alexej Sokolov <[EMAIL PROTECTED]> _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"
