hello,
I need some information about call gates: how to set them up (are they written in the GDT or in the IDT) and how to use them.
Thanks in advance for any help.
Call gates
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Pype.Clicker
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Re:Call gates
i suggest you get a look at these threads:
http://www.mega-tokyo.com/forum/index.p ... 38;start=0
http://www.mega-tokyo.com/forum/index.p ... 27;start=0
http://www.mega-tokyo.com/forum/index.p ... 36;start=0
(very) basically, a 'gate' is a 'jump/call redirector'. You place a gate #i in a process LDT and when the program will CALL i:0, it will actually be calling SOME_OTHER_CODE_SEGMENT:SOME_FUNCTION.
Gates may also offer priviledge raising and transparent stack-based parameters passing...
http://www.mega-tokyo.com/forum/index.p ... 38;start=0
http://www.mega-tokyo.com/forum/index.p ... 27;start=0
http://www.mega-tokyo.com/forum/index.p ... 36;start=0
(very) basically, a 'gate' is a 'jump/call redirector'. You place a gate #i in a process LDT and when the program will CALL i:0, it will actually be calling SOME_OTHER_CODE_SEGMENT:SOME_FUNCTION.
Gates may also offer priviledge raising and transparent stack-based parameters passing...