Index: usr.bin/procstat/procstat_vm.c
===================================================================
--- usr.bin/procstat/procstat_vm.c	(revision 238163)
+++ usr.bin/procstat/procstat_vm.c	(working copy)
@@ -72,7 +72,9 @@
 		printf("%-1s", kve->kve_flags & KVME_FLAG_COW ? "C" : "-");
 		printf("%-1s", kve->kve_flags & KVME_FLAG_NEEDS_COPY ? "N" :
 		    "-");
-		printf("%-1s ", kve->kve_flags & KVME_FLAG_SUPER ? "S" : "-");
+		printf("%-1s", kve->kve_flags & KVME_FLAG_SUPER ? "S" : "-");
+		printf("%-1s ", kve->kve_flags & KVME_FLAG_GROWS_UP ? "U" :
+		    kve->kve_flags & KVME_FLAG_GROWS_DOWN ? "D" : "-");
 		switch (kve->kve_type) {
 		case KVME_TYPE_NONE:
 			str = "--";
Index: usr.bin/procstat/procstat.1
===================================================================
--- usr.bin/procstat/procstat.1	(revision 238163)
+++ usr.bin/procstat/procstat.1	(working copy)
@@ -25,7 +25,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd March 23, 2012
+.Dd July 11, 2012
 .Dt PROCSTAT 1
 .Os
 .Sh NAME
@@ -433,6 +433,10 @@
 needs copy
 .It S
 one or more superpage mappings are used
+.It D
+grows down (top-down stack)
+.It U
+grows up (bottom-up stack)
 .El
 .Sh EXIT STATUS
 .Ex -std
Index: sys/sys/user.h
===================================================================
--- sys/sys/user.h	(revision 238163)
+++ sys/sys/user.h	(working copy)
@@ -413,6 +413,8 @@
 #define	KVME_FLAG_NEEDS_COPY	0x00000002
 #define	KVME_FLAG_NOCOREDUMP	0x00000004
 #define	KVME_FLAG_SUPER		0x00000008
+#define	KVME_FLAG_GROWS_UP	0x00000010
+#define	KVME_FLAG_GROWS_DOWN	0x00000020
 
 #if defined(__amd64__)
 #define	KINFO_OVMENTRY_SIZE	1168
Index: sys/kern/kern_proc.c
===================================================================
--- sys/kern/kern_proc.c	(revision 238163)
+++ sys/kern/kern_proc.c	(working copy)
@@ -2189,6 +2189,10 @@
 			kve->kve_flags |= KVME_FLAG_NEEDS_COPY;
 		if (entry->eflags & MAP_ENTRY_NOCOREDUMP)
 			kve->kve_flags |= KVME_FLAG_NOCOREDUMP;
+		if (entry->eflags & MAP_ENTRY_GROWS_UP)
+			kve->kve_flags |= KVME_FLAG_GROWS_UP;
+		if (entry->eflags & MAP_ENTRY_GROWS_DOWN)
+			kve->kve_flags |= KVME_FLAG_GROWS_DOWN;
 
 		last_timestamp = map->timestamp;
 		vm_map_unlock_read(map);