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[Bug gdb/20287] X32 and "gdb_static_assert (sizeof (nat_siginfo_t) == sizeof (siginfo_t))"
- From: "palves at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: gdb-prs at sourceware dot org
- Date: Wed, 22 Jun 2016 12:55:57 +0000
- Subject: [Bug gdb/20287] X32 and "gdb_static_assert (sizeof (nat_siginfo_t) == sizeof (siginfo_t))"
- Auto-submitted: auto-generated
- References: <bug-20287-4717 at http dot sourceware dot org/bugzilla/>
https://sourceware.org/bugzilla/show_bug.cgi?id=20287
--- Comment #10 from Pedro Alves <palves at redhat dot com> ---
It shouldn't make a difference because the _pad field should guarantee a stable
size. The whole siginfo_t object should be 128 bytes.
Unless of course, the _pad field's definition is wrong , which sounds quite
plausible:
>From above, it's:
56 int _pad[((128 / sizeof (int)) - 4)];
While /usr/include/bits/siginfo.h has:
# define __SI_MAX_SIZE 128
# if __WORDSIZE == 64
# define __SI_PAD_SIZE ((__SI_MAX_SIZE / sizeof (int)) - 4)
# else
# define __SI_PAD_SIZE ((__SI_MAX_SIZE / sizeof (int)) - 3)
# endif
And I believe __WORDSIZE == 32 for x32.
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