gcc's x86 "RET"-machine instruction optimization

[Josef Angermeier]

Hello

> > 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.

oh great!

> (I wouldn't be surprised if you run into other problems with your
> approach, but that switch should take care of that particular
> problem.)

Mmm, i'd appreciate all hints to what problems could happen when going
this approach. Doesn't matter how vague. 

> Ian
Thanks Ian, again !

josef
ciao