From: Peter Maydell <peter.maydell@linaro.org>
Date: Thu, 28 Jul 2016 11:57:59 +0000 (+0100)
Subject: linux-user: Use correct alignment for long long on i386 guests
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=d9fe91d8689b078acfd27bc7c4a4e1efd5bbcf65;p=qemu.git

linux-user: Use correct alignment for long long on i386 guests

For i386, the ABI specifies that 'long long' (8 byte values)
need only be 4 aligned, but we were requiring them to be
8-aligned. This meant we were laying out the target_epoll_event
structure wrongly. Add a suitable ifdef to abitypes.h to
specify the i386-specific alignment requirement.

Reported-by: Icenowy Zheng <icenowy@aosc.xyz>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
---

diff --git a/include/exec/user/abitypes.h b/include/exec/user/abitypes.h
index a09d6c64ff..ba188608c2 100644
--- a/include/exec/user/abitypes.h
+++ b/include/exec/user/abitypes.h
@@ -15,6 +15,10 @@
 #define ABI_LLONG_ALIGNMENT 2
 #endif
 
+#if defined(TARGET_I386) && !defined(TARGET_X86_64)
+#define ABI_LLONG_ALIGNMENT 4
+#endif
+
 #ifndef ABI_SHORT_ALIGNMENT
 #define ABI_SHORT_ALIGNMENT 2
 #endif