Interesting. I've kept my accesses aligned, but noticed that unaligned ones worked. Didn't know about the exception mechanism behind, but yeah, should have err.

Interesting. I've kept my accesses aligned, but noticed that unaligned ones worked. Didn't know about the exception mechanism behind, but yeah, should have err... expected it. By the way, you can also opt to crash on x86. Just need to enable bit AM (Alignment Mask) bit 18) in CR0 (kernel stuff) and AC (Alignment Check, also bit 18) in EFLAGS. After that point, unaligned accesses trap. I use this in my CPU JIT/dynamic compiler to trap target unaligned accesses. https://en.wikipedia.org/wiki/Control_register#CR0 https://en.wikipedia.org/wiki/Control_register#CR0