Hello, It seems there is a bug in our memmove routine. The condition is rare though, for example, memmove copies incorrectly, if src=5, dst=4, len=9. I guess, exact condition is: len > 8, 0 < src - dst < 8, src isn't aligned on qw (8 bytes), src - dst != 4 I may be wrong on exact condition, but at least the example works. Briefly, memmove calls memcpy if src > dst. Then, when memcpy aligns src on qw, it copies qw to dst. So, after src is aligned, it is overwritten as well. In the example, memcpy copies qw at 4 (so, new data ends on 4+8=12), but aligned src is at address 8, so a word at address 8 is overwritten. Two questions here. First, do we have a pattern that satisfies the condition, i.e. is the bug showstopper? My guess, it's not. Second, does somebody have ideas how to fix the bug? Well, I have, but want to hear somebody else. Regards, Gleb.
