[Xen-changelog] [xen-unstable] ioemu: Avoid unaligned guest memory accesses on ia64.

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User kfraser@xxxxxxxxxxxxxxxxxxxxx
# Date 1188398875 -3600
# Node ID b485d8d7347ae33492490d1aca4b404af89b53e2
# Parent  2eb38cefdcd934d7f1142f1ca4f29e118ca04926
ioemu: Avoid unaligned guest memory accesses on ia64.
Signed-off-by: Alex Williamson <alex.williamson@xxxxxx>
Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>
---
 tools/ioemu/target-i386-dm/exec-dm.c |    6 ++++++
 1 files changed, 6 insertions(+)

diff -r 2eb38cefdcd9 -r b485d8d7347a tools/ioemu/target-i386-dm/exec-dm.c
--- a/tools/ioemu/target-i386-dm/exec-dm.c      Wed Aug 29 15:43:53 2007 +0100
+++ b/tools/ioemu/target-i386-dm/exec-dm.c      Wed Aug 29 15:47:55 2007 +0100
@@ -470,6 +470,12 @@ static void memcpy_words(void *dst, void
 #else
 static void memcpy_words(void *dst, void *src, size_t n)
 {
+    /* Some architectures do not like unaligned accesses. */
+    if (((unsigned long)dst | (unsigned long)src) & 3) {
+        memcpy(dst, src, n);
+        return;
+    }
+
     while (n >= sizeof(uint32_t)) {
         *((uint32_t *)dst) = *((uint32_t *)src);
         dst = ((uint32_t *)dst) + 1;

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