On Tue, Feb 26, 2013 at 04:55:54PM +0000, Andreas Schwab wrote:

The expression to compute the padding needed to fill the uc_sigmask field
to 1024 bits actually computes the padding needed for 1080 bits.
Fortunately, due to the 16-byte alignment of the following field
(uc_mcontext) the definition in glibc contains enough bytes of padding
after uc_sigmask so that the overall offsets and size match in both
definitions.

Signed-off-by: Andreas Schwab <redacted>

It looks like I messed the bits vs bytes. Luckily we have the 16-byte
alignment of the last element in ucontext. I'll send the patch upstream.

Thanks.

-- 
Catalin