Perhaps i found the begin of an explanation, in NetBSD and linux , error codes for mincore() are : [EFAULT] vec points to an illegal address. [EINVAL] addr is not a multiple of the system page size. [EINVAL] len is equal to 0. [ENOMEM] The address range specified is invalid for the calling process, or one or more of the pages specified in the range are not mapped So I think that when you call mincore for testing if a page is mapped or not the result would be -1 and errno set to ENOMEM. But in FreeBSD a man mincore give this errors conditions: [EFAULT] vec points to an illegal address. [EINVAL] addr is not a multiple of the system page size. It seems that when a page is not mapped mincore return no error code. -----Message d'origine----- De : julliard(a)wine.dyndns.org [mailto:[email protected]] De la part de Alexandre Julliard Envoyé : jeudi 28 juillet 2005 11:48 À : jean-marc DETREZ Cc : wine-devel(a)winehq.com; emulation(a)freebsd.org; 'Gerald Pfeifer'; barner(a)freebsd.org Objet : Re: patch for libs/wine/mmap.c making wine running on FreeBSD 5.x "jean-marc DETREZ" <jm.detrez(a)cegetel.net> writes: That's the way it should be, we don't care if the page is in core or not, we only want to know if something is mapped there. -- Alexandre Julliard julliard(a)winehq.org