On Mon, Sep 21, 2015 at 06:23:54PM +0200, Marc Marí wrote: > On Mon, 21 Sep 2015 12:03:29 -0400 > "Kevin O'Connor" <ke...@koconnor.net> wrote: > > Also, your code seems to run regular 32bit code when in "long mode" - > > is that valid? > > It doesn't crash. And I think it's valid. When dissasembling, the 64 bit > operations have the prefix 0x48, the same that happens in a "normal" 64 > bit application.
It looks like "push" and "pop" have different semantics in "long mode". It looks like they decrement the stack by 8 bytes even for 32bit operands. There may be other instructions as well. So, I don't think we'd want to run 32bit generated gcc code when in 64bit mode. -Kevin _______________________________________________ SeaBIOS mailing list SeaBIOS@seabios.org http://www.seabios.org/mailman/listinfo/seabios
