[gclist] memory protections and system calls

[Hans Boehm]

"Maybe we should have our wrappers check for EFAULT and fix things..."

I have been told that at least under some now obsolete UNIX versions
this wasn't possible.  People at PARC experimented with such things
before I went there.  Apparently reads from some devices don't keep
sufficient state in this case to be able to restart the read without
losing data.  I don't know of anyone who has tried this recently.

Hans
Hans-Juergen Boehm
boehm@mti.sgi.com