https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88469
--- Comment #13 from Richard Earnshaw <rearnsha at gcc dot gnu.org> --- (In reply to Stefan Ring from comment #12) > Unfortunately my armv5 device has died in the meantime, so I cannot verify > my original use case. The behavior is indeed different on armv7. It does not > trap, even for the original misaligned code. And contrary to x86, where the > alignment check flag can be changed by user space, this is a privileged > operation on arm, so I cannot even selectively enable it. Note that if you have root access on your board you can modify the kernel's behaviour for various unaligned accesses by changing /proc/cpu/alignment (see Documentation/arm/mem_alignment in the kernel sources). You might want to try setting this to 3 to get the kernel to report (but fix up) any misaligned accesses).
