From 4cab678cdc932d85a7c8a40414028d50df2d71fc Mon Sep 17 00:00:00 2001
From: niklas <niklas@openbsd.org>
Date: Sat, 4 May 1996 13:24:48 +0000
Subject: [PATCH] From NetBSD: Add a check in the kernel reload device
 (/dev/reload) to protect against the MMU switch code being in different
 locations between the running kernel and the new kernel.  Returns ENODEV if
 the reload fails. Change the error return from EFAULT to ENOEXEC when
 kernel_reload gets a short write on the exec header. Missed a prototype for
 kernel_reload().

---
 sys/arch/amiga/amiga/amiga_init.c | 22 ++++++++++++----------
 1 file changed, 12 insertions(+), 10 deletions(-)

diff --git a/sys/arch/amiga/amiga/amiga_init.c b/sys/arch/amiga/amiga/amiga_init.c
index 4899de06ed1..238ed694ee0 100644
--- a/sys/arch/amiga/amiga/amiga_init.c
+++ b/sys/arch/amiga/amiga/amiga_init.c
@@ -1,5 +1,5 @@
-/*	$OpenBSD: amiga_init.c,v 1.8 1996/05/02 06:43:09 niklas Exp $	*/
-/*	$NetBSD: amiga_init.c,v 1.37 1996/04/21 21:06:46 veego Exp $	*/
+/*	$OpenBSD: amiga_init.c,v 1.9 1996/05/04 13:24:48 niklas Exp $	*/
+/*	$NetBSD: amiga_init.c,v 1.39 1996/05/02 19:34:27 mhitch Exp $	*/
 
 /*
  * Copyright (c) 1994 Michael L. Hitch
@@ -108,7 +108,8 @@ void rollcolor __P((int));
 static int kernel_image_magic_size __P((void));
 static void kernel_image_magic_copy __P((u_char *));
 int kernel_reload_write __P((struct uio *));
-extern void kernel_reload ();
+extern void kernel_reload __P((char *, u_long, u_long, u_long, u_long,
+	u_long, u_long, u_long, u_long, u_long));
 extern void etext __P((void));
 
 void *
@@ -721,7 +722,7 @@ kernel_reload_write(uio)
 		 * in the first write.
 		 */
 		if (iov->iov_len < sizeof(kernel_exec))
-			return EFAULT;		/* XXX */
+			return ENOEXEC;		/* XXX */
 
 		/*
 		 * Pull in the exec header and check it.
@@ -815,7 +816,6 @@ kernel_reload_write(uio)
 		 * Put the finishing touches on the kernel image.
 		 */
 		kernel_image_magic_copy(kernel_image + kernel_load_ofs);
-		bootsync();
 		/*
 		 * Start the new kernel with code in locore.s.
 		 */
@@ -824,13 +824,15 @@ kernel_reload_write(uio)
 		    kernel_exec.a_entry, boot_fphystart, boot_fphysize,
 		    boot_cphysize, kernel_symbol_esym, eclockfreq,
 		    boot_flags, scsi_nosync);
-		/*NOTREACHED*/
 		/*
-		 * XXX - kernel_reload() needs to verify that the
-		 * reload code is at the same location in the new
-		 * kernel.  If it isn't, it will return and we will
-		 * return an error.
+		 * kernel_reload() now checks to see if the reload_code
+		 * is at the same location in the new kernel.
+		 * If it isn't, it will return and we will return
+		 * an error.
 		 */
+		free(kernel_image, M_TEMP);
+		kernel_image = NULL;
+		return (ENODEV);	/* Say operation not supported */
 	case 3:		/* done loading kernel symbol table */
 		c = *((u_long *)(kernel_image + kernel_load_ofs - 4));
 		if (c > 16 * (kernel_exec.a_syms / 12))
-- 
2.20.1