3 ms·

> I use ~50 bytes of pre-compiled code so that it'll compile anywhere. To do that, I have to mark the block R|X. Memory is cheap; mmap 4K of R|W RAM, copy the

• byuu 10y ago
  That turns the address from a compile-time constant into a pointer. This function is used tens of millions of times a second, so that cost would add up. I covered this in my initial post, though :/
  • bonzini 10y ago
    On glibc you could use ifunc to patch the address at run-time.