File 0288-include-qemu-osdep.h-Add-macros-for.patch of Package qemu.12243

From eb0a7fe58ffd7c86b7f26ee0a37def22a7ea1389 Mon Sep 17 00:00:00 2001
From: Sergey Fedorov <serge.fdrv@gmail.com>
Date: Fri, 22 Apr 2016 19:08:44 +0300
Subject: [PATCH] include/qemu/osdep.h: Add macros for pointer alignment

These macros provide a convenient way to n-byte align pointers up and
down and check if a pointer is n-byte aligned.

Signed-off-by: Sergey Fedorov <serge.fdrv@gmail.com>
Signed-off-by: Sergey Fedorov <sergey.fedorov@linaro.org>
Message-Id: <1461341333-19646-3-git-send-email-sergey.fedorov@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
(cherry picked from commit 6b587d3cda48e7ba26de8d30bf0d8a7063970715)
[LD: BSC#1106222 CVE-2018-15746]
Signed-off-by: Larry Dewey <ldewey@suse.com>
---
 include/qemu/osdep.h | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h
index f2e97b4774..34daa7843a 100644
--- a/include/qemu/osdep.h
+++ b/include/qemu/osdep.h
@@ -159,6 +159,20 @@ extern int daemon(int, int);
 /* Round number up to multiple */
 #define QEMU_ALIGN_UP(n, m) QEMU_ALIGN_DOWN((n) + (m) - 1, (m))
 
+/* Check if n is a multiple of m */
+#define QEMU_IS_ALIGNED(n, m) (((n) % (m)) == 0)
+
+/* n-byte align pointer down */
+#define QEMU_ALIGN_PTR_DOWN(p, n) \
+    ((typeof(p))QEMU_ALIGN_DOWN((uintptr_t)(p), (n)))
+
+/* n-byte align pointer up */
+#define QEMU_ALIGN_PTR_UP(p, n) \
+    ((typeof(p))QEMU_ALIGN_UP((uintptr_t)(p), (n)))
+
+/* Check if pointer p is n-bytes aligned */
+#define QEMU_PTR_IS_ALIGNED(p, n) QEMU_IS_ALIGNED((uintptr_t)(p), (n))
+
 #ifndef ROUND_UP
 #define ROUND_UP(n, d) (((n) + (d) - 1) & -(0 ? (n) : (d)))
 #endif