On Fri, 21 Nov 2014 12:42:34 +0000, Simon McVittie wrote: > A couple of questions for people who know low-level things: > > * Of Debian's architectures (official and otherwise), which ones are > known/defined/designed to be OK with unaligned accesses from > user-space, and which ones (can be configured to) crash or give wrong > answers? > > * Would it be safer to assume that future architectures are in the > "unaligned accesses are OK" category, or the "not OK" > category? > > The ones I know for sure are: > > - OK: any-i386, any-amd64 - not OK: armel > > I believe powerpc, s390 and arm64 might be in the "OK" category, and > mips* and sparc in the "not OK" category.
Sparc is definitely not ok. For evidence, see #721617, liblo was trying to fetch a double from a 4-byte aligned address. Experience with liblo shows that other architectures are just fine (or at least are just slower) with this type of unalignment. -- Saludos, Felipe Sateler -- To UNSUBSCRIBE, email to debian-devel-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/m4ngps$85h$1...@ger.gmane.org
