From 99ac3bc8daec20f7a937487362d15fdf922d8008 Mon Sep 17 00:00:00 2001
From: Peter Wemm <peter@FreeBSD.org>
Date: Sat, 24 Feb 1996 14:32:53 +0000
Subject: [PATCH] Add two sysctl variables that can be read by libutil and
 libkvm so that they can adapt to simple kernel VM layout changes.

---
 sys/kern/kern_exec.c | 13 ++++++++++++-
 sys/sys/sysctl.h     |  8 ++++++--
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/sys/kern/kern_exec.c b/sys/kern/kern_exec.c
index 1c4c4a44c018..9933183aff40 100644
--- a/sys/kern/kern_exec.c
+++ b/sys/kern/kern_exec.c
@@ -28,7 +28,7 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	$Id: kern_exec.c,v 1.33 1996/01/19 03:58:01 dyson Exp $
+ *	$Id: kern_exec.c,v 1.34 1996/01/20 21:36:30 bde Exp $
  */
 
 #include <sys/param.h>
@@ -47,6 +47,7 @@
 #include <sys/sysent.h>
 #include <sys/syslog.h>
 #include <sys/shm.h>
+#include <sys/sysctl.h>
 
 #include <vm/vm.h>
 #include <vm/vm_param.h>
@@ -63,6 +64,16 @@ static int *exec_copyout_strings __P((struct image_params *));
 
 static int exec_check_permissions(struct image_params *);
 
+/*
+ * XXX trouble here if sizeof(caddr_t) != sizeof(int), other parts
+ * of the sysctl code also assumes this, and sizeof(int) == sizeof(long).
+ */
+static caddr_t ps_strings = (caddr_t)PS_STRINGS;
+SYSCTL_INT(_kern, KERN_PS_STRINGS, ps_strings, 0, &ps_strings, 0, "");
+
+static caddr_t usrstack = (caddr_t)USRSTACK;
+SYSCTL_INT(_kern, KERN_USRSTACK, usrstack, 0, &usrstack, 0, "");
+
 /*
  * execsw_set is constructed for us by the linker.  Each of the items
  * is a pointer to a `const struct execsw', hence the double pointer here.
diff --git a/sys/sys/sysctl.h b/sys/sys/sysctl.h
index 4d6288797fc6..fc52c899e69c 100644
--- a/sys/sys/sysctl.h
+++ b/sys/sys/sysctl.h
@@ -34,7 +34,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)sysctl.h	8.1 (Berkeley) 6/2/93
- * $Id: sysctl.h,v 1.38 1995/12/09 20:46:06 phk Exp $
+ * $Id: sysctl.h,v 1.39 1995/12/17 21:11:12 phk Exp $
  */
 
 #ifndef _SYS_SYSCTL_H_
@@ -221,7 +221,9 @@ int sysctl_handle_opaque SYSCTL_HANDLER_ARGS;
 #define KERN_DUMPDEV		29	/* dev_t: device to dump on */
 #define	KERN_SOMAXCONN		30	/* int: max connections in listen q */
 #define	KERN_MAXSOCKBUF		31	/* int: max size of a socket buffer */
-#define KERN_MAXID		32      /* number of valid kern ids */
+#define	KERN_PS_STRINGS		32	/* int: address of PS_STRINGS */
+#define	KERN_USRSTACK		33	/* int: address of USRSTACK */
+#define KERN_MAXID		34      /* number of valid kern ids */
 
 #define CTL_KERN_NAMES { \
 	{ 0, 0 }, \
@@ -256,6 +258,8 @@ int sysctl_handle_opaque SYSCTL_HANDLER_ARGS;
 	{ "dumpdev", CTLTYPE_STRUCT }, /* we lie; don't print as int */ \
 	{ "somaxconn", CTLTYPE_INT }, \
 	{ "maxsockbuf", CTLTYPE_INT }, \
+	{ "ps_strings", CTLTYPE_INT }, \
+	{ "usrstack", CTLTYPE_INT }, \
 }
 
 /*