[Spice-devel] [PATCH] demarshall: Add safe method for unaligned byte access.

[Anton D. Kachalov]

Hello, Frediano.

Option "-mno-unaligned-access" doesn't help. Got a lot of "Alignment trap". No additional code such as __aeabi_uread4() has added by the compiler. No runtime checks. Looks like it just ignored. GCC 4.8.2.

   http://sourceforge.net/p/tianocore/edk2/ci/68085d37f88aaaaad97f071e2d0e60b276592cc5/

Like stated here:

   http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.faqs/ka15414.html

Would globally enabled aligned reads decrease an overall performance?

27.11.2015, 16:56, "Frediano Ziglio" <fziglio at redhat.com>:
>>
>>  Anton, which architecture it's your machine. Could be that using some
>>  gcc options would make the compiler generate only aligned access
>>  instructions.
>
> Can you try to add -mno-unaligned-access option to your CFLAGS ?
>
> Frediano

-- 
Anton D. Kachalov

ITO, System Architect
Tel: 7 (495) 739-70-00 ext.7613