[src/trunk]: src/sys/arch/i386/stand/bootxx pass errno through switch to prot...

[mlelstv <mlelstv%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/ba43bde95a79
branches:  trunk
changeset: 363365:ba43bde95a79
user:      mlelstv <mlelstv%NetBSD.org@localhost>
date:      Sun Mar 06 18:35:43 2022 +0000

description:
pass errno through switch to protected mode.

diffstat:

 sys/arch/i386/stand/bootxx/bootxx.S |  5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diffs (26 lines):

diff -r cd339f453401 -r ba43bde95a79 sys/arch/i386/stand/bootxx/bootxx.S
--- a/sys/arch/i386/stand/bootxx/bootxx.S       Sun Mar 06 17:54:52 2022 +0000
+++ b/sys/arch/i386/stand/bootxx/bootxx.S       Sun Mar 06 18:35:43 2022 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: bootxx.S,v 1.11 2019/07/11 03:49:51 msaitoh Exp $      */
+/*     $NetBSD: bootxx.S,v 1.12 2022/03/06 18:35:43 mlelstv Exp $      */
 
 /*-
  * Copyright (c) 2003 The NetBSD Foundation, Inc.
@@ -79,6 +79,7 @@
        push    %edx
        call    _C_LABEL(boot1)         /* C code to load /boot */
        add     $8, %esp
+       movw    errno, %dx
        call    prot_to_real
        .code16
 
@@ -94,7 +95,7 @@
 
 boot_fail:
        push    %ax                     /* error string from boot1 */
-       movw    errno, %ax
+       movw    %dx, %ax
        aam                             /* largest errno is < 100 */
        addw    $('0' << 8) | '0', %ax  /* to ascii */
        rorw    $8, %ax