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x32, siginfo: Provide proper overrides for x32 siginfo_t 

Provide the proper override macros for x32 siginfo_t.  The combination
of a special type here and an overall alignment constraint actually
ends up with all the types being properly aligned, but the hack is
needed to keep the substructures inside siginfo_t from adding padding.

Note: use __attribute__((aligned())) since __aligned() is not exported
to user space.

[ v2: fix stray semicolon ]

Reported-by: H.J. Lu <hjl.rools@gmail.com>
Cc: Bruce J. Beare <bruce.j.beare@intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Link: http://lkml.kernel.org/r/CAMe9rOqF6Kh6-NK7oP0Fpzkd4SBAWU%2BG53hwBbSD4iA2UzyxuA@mail.gmail.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
H. Peter Anvin 2012-04-23 16:34:12 -07:00 committed by H. Peter Anvin
parent d643bdca8a
commit 89b8835ec8
1 changed files with 7 additions and 1 deletions
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8
arch/x86/include/asm/siginfo.h
View File

@ -2,7 +2,13 @@
#define _ASM_X86_SIGINFO_H
#ifdef __x86_64__
# define __ARCH_SI_PREAMBLE_SIZE (4 * sizeof(int))
# ifdef __ILP32__ /* x32 */
typedef long long __kernel_si_clock_t __attribute__((aligned(4)));
# define __ARCH_SI_CLOCK_T __kernel_si_clock_t
# define __ARCH_SI_ATTRIBUTES __attribute__((aligned(8)))
# else /* x86-64 */
# define __ARCH_SI_PREAMBLE_SIZE (4 * sizeof(int))
# endif
#endif
#include <asm-generic/siginfo.h>