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 Post subject: Use of sysenter/sysexit
PostPosted: Mon Aug 26, 2019 12:29 pm 
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Joined: Sun Jun 05, 2005 11:00 pm
Posts: 233
Hi guys, how have you beem? good I hope!, now could anyone help me on using sysenter/sysexit? I don't know if i'm using in the right way!

example.

setup stack, etc.
sysenter.

do operating system calls etc.
sysexit.

ret.

or do I need to use like:

setup stack:
sysenter.
int xx.
sysexit
etc.
etc.
ret

could anyone help please?

thanks in advance!


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 Post subject: Re: Use of sysenter/sysexit
PostPosted: Mon Aug 26, 2019 1:28 pm 
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You're supposed to use SYSENTER instead of INT to call the operating system, and SYSEXIT instead of IRET to return to the application program. (You have to make some more changes for it to work properly, but that's the basic idea.)

Does that answer your question?


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 Post subject: Re: Use of sysenter/sysexit
PostPosted: Tue Aug 27, 2019 3:54 pm 
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Joined: Sun Jun 05, 2005 11:00 pm
Posts: 233
Thanks so much dear friend.

I'm doing in the way you said.

tnx a lot.


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