On Mon, Apr 22, 2002 at 05:30:08PM +0200, Maciej W. Rozycki wrote: > Well, for Alpha ioperm/iopl functions check the system type in > /proc/cpuinfo (we seem to have enough information there as well) and > failing this they check a result of readlink of /etc/alpha_systype. Then > an appropriate region of /dev/mem is mmapped with per-page permissions set > up as requested if ioperm is used (with a worse granularity, though) and > subsequent in/out function invocations access the area as appropriate. > See sysdeps/unix/sysv/linux/alpha/ioperm.c in glibc for details -- it's a > pretty clever solution with good performance and only a few trade-offs. Thanks for volunteering ;) Ralf
