From: Pieter de Boer <pie...@thedarkside.nl> Subject: Protecting against kernel NULL-pointer derefs Date: Tue, 15 Sep 2009 10:03:48 +0200
> - Are there unwanted side-effects of raising VM_MIN_ADDRESS? Mapping at address 0x0 is needed by some softwares using vm86 mode. For example, emulators/doscmd uses vm86 mode to emulate an old DOS environment. In this case, the address 0x0 - 0x3ff is used for an interrupt vector of emulated DOS world. If VM_MIN_ADDRESS is not zero, doscmd doesn't work. vm86 mode is in 32bit i386 architecture only, not in amd64 or other architectures. -- Hideki EIRAKU -------------------------------------- Thanks 10 years! Yahoo! Shopping and Yahoo! Auctions http://pr.mail.yahoo.co.jp/ec10years/ _______________________________________________ freebsd-security@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-security To unsubscribe, send any mail to "freebsd-security-unsubscr...@freebsd.org"
