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From: Marc S. <el...@bu...> - 2002-09-21 15:18:16
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On Sat, Sep 21, 2002 at 04:14:36PM +1000, Ken Yap wrote: > >What I did was abandon the ill conceived real-mode stack and setup a > >new protected mode stack in .bss. It works for me. > > This shows that you don't understand what is happening. When first32 > gets called in PM, it is handed a PM stack, but it's at an unsuitable > address. Making first32 get its own PM stack within 64kB of the text > segment fixes the problem. This is the approach taken by menustart.S. > > The RM stuff is in a different #ifdef branch and should be read > separately. I don't think you understand what I was trying to do. I figured it was better to make a special real-mode stack for calling interrupts than to fuss with the protected-mode stack. This has nothing to do with the way that the loaders was called--I read ifdef's just fine. Instead, it had to do with the fact that the loader was crashing when transitioning to real-mode to make interrupt calls. As I said, it was ill conceived because I would have had to do a lot more to make it work properly. The prot-mode stack fix was easier and clearly more effective. |
