Hi Arnd,
On Sun, 2024-10-27 at 13:15 +0000, Arnd Bergmann wrote:
On Sun, Oct 27, 2024, at 06:16, Finn Thain wrote:
On Sun, 27 Oct 2024, Thorsten Glaser wrote:
Finn Thain dixit:
That would mean __alignof__(foo.b) == sizeof(foo.b) but that's not the
case on my Linux/i686 system. 4 != 8:
struct baa {
int a;
long long b;
} foo;
That struct is just 12 bytes for you then?
Right. i686 and m68k agree on that.
The other ones that have misaligned 'long long' variables are
arc
arm (OABI only)
csky
microblaze
nios2
openrisc
superh
i386
The 32-bit architectures that use a natural 8-byte
alignment are
arm (EABI)
parisc
mips
powerpc
riscv
s390
sparc
xtensa
m68k is the only architecture supported by linux-6.x that
does 2-byte alignment, otherwise the two seem to be equally
common.
Another useful data point. This is the kind of discussion I had hoped for!
Thanks a lot!
Adrian
--
.''`. John Paul Adrian Glaubitz
: :' : Debian Developer
`. `' Physicist
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