Index: uspace/lib/posix/src/internal/common.h
===================================================================
--- uspace/lib/posix/src/internal/common.h	(revision fec7ba0dc652cc9b10575bcf70be9f369491905c)
+++ uspace/lib/posix/src/internal/common.h	(revision a3f63ac154a8851b99a2cdc01fb73050f4b9ca43)
@@ -67,4 +67,7 @@
 }
 
+// TODO: Remove this arbitrary limit.
+#define VFS_MAX_OPEN_FILES 128
+
 extern aoff64_t posix_pos[VFS_MAX_OPEN_FILES];
 
Index: uspace/lib/posix/src/sys/mman.c
===================================================================
--- uspace/lib/posix/src/sys/mman.c	(revision fec7ba0dc652cc9b10575bcf70be9f369491905c)
+++ uspace/lib/posix/src/sys/mman.c	(revision a3f63ac154a8851b99a2cdc01fb73050f4b9ca43)
@@ -39,4 +39,20 @@
 #include <unistd.h>
 
+static int _prot_to_as(int prot)
+{
+	int ret = 0;
+
+	if (prot & PROT_READ)
+		ret |= AS_AREA_READ;
+
+	if (prot & PROT_WRITE)
+		ret |= AS_AREA_WRITE;
+
+	if (prot & PROT_EXEC)
+		ret |= AS_AREA_EXEC;
+
+	return ret;
+}
+
 void *mmap(void *start, size_t length, int prot, int flags, int fd,
     off_t offset)
@@ -53,5 +69,5 @@
 		return MAP_FAILED;
 
-	return as_area_create(start, length, prot, AS_AREA_UNPAGED);
+	return as_area_create(start, length, _prot_to_as(prot), AS_AREA_UNPAGED);
 }