Fix some 64bit truncation problems which crept into SYSCTL_LONG() with the

last cleanup.  Since the oid_arg2 field of struct sysctl_oid is not wide
enough to hold a long, the SYSCTL_LONG() macro has been modified to only
support exporting long variables by pointer instead of by value.

Reviewed by: bde

3 files changed, 12 insertions, 39 deletions

diff --git a/sys/kern/kern_exec.c b/sys/kern/kern_exec.c
index e3a3b71..93e7bbd 100644
--- a/sys/kern/kern_exec.c
+++ b/sys/kern/kern_exec.c
@@ -23,7 +23,7 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	$Id: kern_exec.c,v 1.89 1998/12/16 16:06:27 bde Exp $
+ *	$Id: kern_exec.c,v 1.90 1998/12/16 16:28:57 bde Exp $
  */
 
 #include <sys/param.h>
@@ -66,8 +66,11 @@
 
 static long *exec_copyout_strings __P((struct image_params *));
 
-SYSCTL_LONG(_kern, KERN_PS_STRINGS, ps_strings, CTLFLAG_RD, 0, PS_STRINGS, "");
-SYSCTL_LONG(_kern, KERN_USRSTACK, usrstack, CTLFLAG_RD, 0, USRSTACK, "");
+static long ps_strings = PS_STRINGS;
+SYSCTL_LONG(_kern, KERN_PS_STRINGS, ps_strings, CTLFLAG_RD, &ps_strings, "");
+
+static long usrstack = USRSTACK;
+SYSCTL_LONG(_kern, KERN_USRSTACK, usrstack, CTLFLAG_RD, &usrstack, "");
 
 /*
  * Each of the items is a pointer to a `const struct execsw', hence the
diff --git a/sys/kern/kern_sysctl.c b/sys/kern/kern_sysctl.c
index b43c4ee..55e583b 100644
--- a/sys/kern/kern_sysctl.c
+++ b/sys/kern/kern_sysctl.c
@@ -37,7 +37,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)kern_sysctl.c	8.4 (Berkeley) 4/14/94
- * $Id: kern_sysctl.c,v 1.79 1998/12/04 22:54:51 archie Exp $
+ * $Id: kern_sysctl.c,v 1.80 1998/12/13 07:18:54 truckman Exp $
  */
 
 #include "opt_compat.h"
@@ -497,7 +497,7 @@ SYSCTL_NODE(_sysctl, 4, oidfmt, CTLFLAG_RD, sysctl_sysctl_oidfmt, "");
  */
 
 /*
- * Handle an integer, signed or unsigned.
+ * Handle an int, signed or unsigned.
  * Two cases:
  *     a variable:  point arg1 at it.
  *     a constant:  pass it in arg2.
@@ -524,7 +524,7 @@ sysctl_handle_int SYSCTL_HANDLER_ARGS
 }
 
 /*
- * Handle an integer, signed or unsigned.
+ * Handle a long, signed or unsigned.
  * Two cases:
  *     a variable:  point arg1 at it.
  *     a constant:  pass it in arg2.
@@ -535,10 +535,7 @@ sysctl_handle_long SYSCTL_HANDLER_ARGS
 {
 	int error = 0;
 
-	if (arg1)
-		error = SYSCTL_OUT(req, arg1, sizeof(long));
-	else
-		error = SYSCTL_OUT(req, &arg2, sizeof(long));
+	error = SYSCTL_OUT(req, arg1, sizeof(long));
 
 	if (error || !req->newptr)
 		return (error);
@@ -551,33 +548,6 @@ sysctl_handle_long SYSCTL_HANDLER_ARGS
 }
 
 /*
- * Handle an integer, signed or unsigned.
- * Two cases:
- *     a variable:  point arg1 at it.
- *     a constant:  pass it in arg2.
- */
-
-int
-sysctl_handle_intptr SYSCTL_HANDLER_ARGS
-{
-	int error = 0;
-
-	if (arg1)
-		error = SYSCTL_OUT(req, arg1, sizeof(intptr_t));
-	else
-		error = SYSCTL_OUT(req, &arg2, sizeof(intptr_t));
-
-	if (error || !req->newptr)
-		return (error);
-
-	if (!arg1)
-		error = EPERM;
-	else
-		error = SYSCTL_IN(req, arg1, sizeof(intptr_t));
-	return (error);
-}
-
-/*
  * Handle our generic '\0' terminated 'C' string.
  * Two cases:
  * 	a variable string:  point arg1 at it, arg2 is max length.
diff --git a/sys/kern/subr_devstat.c b/sys/kern/subr_devstat.c
index 8976c3b..5fcf88e 100644
--- a/sys/kern/subr_devstat.c
+++ b/sys/kern/subr_devstat.c
@@ -25,7 +25,7 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	$Id: subr_devstat.c,v 1.6 1998/11/15 23:57:22 ken Exp $
+ *	$Id: subr_devstat.c,v 1.7 1998/12/04 22:54:51 archie Exp $
  */
 
 #include <sys/param.h>
@@ -243,6 +243,6 @@ SYSCTL_PROC(_kern_devstat, OID_AUTO, all, CTLFLAG_RD|CTLTYPE_OPAQUE,
 SYSCTL_INT(_kern_devstat, OID_AUTO, numdevs, CTLFLAG_RD, &devstat_num_devs,
 	  0, "Number of devices in the devstat list");
 SYSCTL_LONG(_kern_devstat, OID_AUTO, generation, CTLFLAG_RD,
-	    &devstat_generation, 0, "Devstat list generation");
+	    &devstat_generation, "Devstat list generation");
 SYSCTL_INT(_kern_devstat, OID_AUTO, version, CTLFLAG_RD, &devstat_version,
 	  0, "Devstat list version number");