PATCH: revive FreeBSD support

[Gerald Pfeifer]

This is a generalized version of a patch that Simon submitted to the
FreeBSD project to make FreeBSD work again.  I adjusted it to retain
the original behavior on other platforms, and it has undergone successful
testing by various FreeBSD users.

Gerald

ChangeLog:
Make us work on FreeBSD again.
Index: dlls/ntdll/virtual.c
===================================================================
RCS file: /home/wine/wine/dlls/ntdll/virtual.c,v
retrieving revision 1.41
diff -u -3 -p -r1.41 virtual.c
--- dlls/ntdll/virtual.c	11 Oct 2004 20:59:06 -0000	1.41
+++ dlls/ntdll/virtual.c	3 Dec 2004 04:06:42 -0000
@@ -119,6 +119,12 @@ static CRITICAL_SECTION csVirtual = { &c
 /* Note: these are Windows limits, you cannot change them. */
 # define ADDRESS_SPACE_LIMIT  ((void *)0xc0000000)  /* top of the total available address space */
 # define USER_SPACE_LIMIT     ((void *)0x80000000)  /* top of the user address space */
+# ifdef __FreeBSD__
+#  define LOW_SPACE_LIMIT     ((void *)0x110000)   /* lower address space limit */
+# else
+#  define LOW_SPACE_LIMIT     NULL
+# endif
+
 #else
 static UINT page_shift;
 static UINT page_mask;
@@ -600,7 +606,7 @@ static NTSTATUS map_view( struct file_vi
 
         for (;;)
         {
-            if ((ptr = wine_anon_mmap( NULL, view_size, VIRTUAL_GetUnixProt(vprot), 0 )) == (void *)-1)
+            if ((ptr = wine_anon_mmap( LOW_SPACE_LIMIT, view_size, VIRTUAL_GetUnixProt(vprot), 0 )) == (void *)-1)
             {
                 if (errno == ENOMEM) return STATUS_NO_MEMORY;
                 return STATUS_INVALID_PARAMETER;
Index: README
===================================================================
RCS file: /home/wine/wine/README,v
retrieving revision 1.47
diff -u -3 -p -r1.47 README
--- README	21 Nov 2004 15:33:00 -0000	1.47
+++ README	11 Dec 2004 21:20:02 -0000
@@ -44,10 +44,8 @@ Linux info:
   it's best to have a current kernel such as 2.4.x.
 
 FreeBSD info:
-  Wine should build on FreeBSD 4.x and FreeBSD 5.x before 5.3, but will
-  generally not work on these systems due to issues with threading and
-  mmap().  In fact, even on FreeBSD 5.3 you will need the kernel patch
-  posted at <http://www.freebsd.org/cgi/query-pr.cgi?pr=73092>.
+  Wine should build on FreeBSD 4.x and FreeBSD 5.x, but versions before
+  FreeBSD 5.3 will generally not work properly.
  
   More information can be found in the FreeBSD ports tree at
   <ftp://ftp.freebsd.org/pub/FreeBSD/ports/ports/emulators/wine/>.