I'm not sure if there's a connection here or if it's just a coincidence
but in a completely separate library (libffi) I noticed a very recent
commit by Mark Kettenis (6th Nov 2013) which he describes as "Align the
stack pointer to 16-bytes". Unfortunately, his change is in an assembly
language module which I cant profess to understand. Is anyone here
qualified to check the git log for libffi to find out if Mark's arrived
at the same flawed conclusion about stack alignment or if (in his case)
there's a valid reason for setting 16-byte alignment?
Assuming there isn't, I don't mind joining the mailing list for libffi
and bringing their attention to the points you guys are discussing
here. I presume that if 16-byte alignment isn't universally valid for
pixman it probably isn't valid for other libraries either?
John
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