From: nowhere@never.at   
      
   On 20/03/2023 01:21, muta...@gmail.com wrote:   
   ...   
   > Someone has replied offline and said that call and ret won't   
   > do 32-bit anymore, but it is probably possible to do that   
   > manually.   
      
   > I assume the syntax would be:   
   >   
   > mov eax, after   
   > mov [esp + 0], eax   
   > mov eax, sub   
   > jmp *eax   
   > after:   
   >   
   > sub:   
   > ...   
   > mov eax, [esp + 0]   
   > jmp *eax   
      
   this may not work as you expect.   
   and what's wrong with call/ret in long mode   
      
   FF D0    .... C3   
   48 FF D0 .... C3   
      
   if you like to run 32 bit code within 64 bit environment then just   
   switch back and forth between this two modes.   
   Oh, you don't have a BIOS/UEFI function for such ? write your own.   
   __   
   wolfgang   
      
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