Josef Angermeier <sijoange@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> writes: > GCC uses a jmp-instruction instead of a call one, so 'speeds up' execution by > saving the execution of bios_16_xxxx's return instruction (lretw one). This of course > ruins my efforts. Therfore i'd like to know how this optimization is called, and if > there is any gcc option to disable this particular optimization. These are called sibling calls, and you can turn the optimization off using -fno-optimize-sibling-calls. (I wouldn't be surprised if you run into other problems with your approach, but that switch should take care of that particular problem.) Ian
