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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>
This commit is contained in:
Peter Maydell 2016-07-28 12:57:59 +01:00 committed by Riku Voipio
parent 09704e6ded
commit d9fe91d868
1 changed files with 4 additions and 0 deletions
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4
include/exec/user/abitypes.h
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@ -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