From: Rustad, Mark D
...
> >> static int smp_ah(struct crypto_blkcipher *tfm, const u8 irk[16],
> >> const u8 r[3], u8 res[3])
> >
> > Expect that it looks like you are passing arrays by value,
> > but instead you are passing by reference.
> >
> > Explicitly pass by reference and sizeof works.
>
> It depends on what you mean by works. It at least doesn't look so misleading
> when passing by reference
> and so works more as expected. The sizeof in either case will never return
> the size of the array. To
> have sizeof return the size of the array would require a typedef of the array
> to pass by reference. In
> some cases that could be the right thing to do.
Feed:
int bar(int (*f)[10]) { return sizeof *f; }
into cc -O2 -S and look at the generated code - returns 40 not 4.
David
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