Linker limitations on 32-bit architectures

The most annoying one to me is that it doesn't check pointer alignment for load/store instructions which fail when misaligned on real hardware. E.g. ldm and ldrd on armv7 require 4-byte alignment (even though ldr does not), but qemu does not check this.

It's unfortunately pretty easy to screw up alignment in C code, and cause your program to only crash on real hardware...