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Memory alignment bug under iOS

Hi,

I believe there is a bug in sysv.S's usage of .align 0 under ARM. It
wrongfully assumes that Apple's Assembler interprets .align 0 as .align 2.
GNU's Assembler certainly does this:
http://sourceware.org/binutils/docs/as/ARM-Directives.html

but Apple's does not:
https://developer.apple.com/library/mac/#documentation/developertools/Reference/Assembler/040-Assembler_Directives/asm_directives.html

As a result, the generated code does not align memory correctly. I look
forward to your response.

Thanks,
Gili
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