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-rw-r--r--bsps/i386/pc386/console/vgacons.c33
1 files changed, 28 insertions, 5 deletions
diff --git a/bsps/i386/pc386/console/vgacons.c b/bsps/i386/pc386/console/vgacons.c
index 2886496e51..a3b326d8e1 100644
--- a/bsps/i386/pc386/console/vgacons.c
+++ b/bsps/i386/pc386/console/vgacons.c
@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
/*
* This file contains the termios TTY driver for the i386
* vga.
@@ -5,9 +7,26 @@
* COPYRIGHT (c) 1989-2011.
* On-Line Applications Research Corporation (OAR).
*
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rtems.org/license/LICENSE.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
*/
#include <rtems.h>
@@ -151,8 +170,12 @@ bool vgacons_probe(
rtems_status_code status;
static bool firstTime = true;
- if ((*(unsigned char*) NB_MAX_ROW_ADDR == 0) &&
- (*(unsigned short*)NB_MAX_COL_ADDR == 0)) {
+ /*
+ * See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99578#c16
+ */
+ const uint8_t* volatile nb_max_row = (const uint8_t*) NB_MAX_ROW_ADDR;
+ const uint16_t* volatile nb_max_col = (const uint16_t*) NB_MAX_COL_ADDR;
+ if ((*nb_max_row == 0) && (*nb_max_col == 0)) {
return false;
}