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Date: Thu, 10 Jan 2002 12:12:10 -0500
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From: DJ Delorie <dj AT delorie DOT com>
To: djgpp-workers AT delorie DOT com
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	=?iso-8859-2?Q?Wojciech_Ga=B3=B1zka?= on Thu, 10 Jan 2002 10:39:19
	+0100)
Subject: Re: WIP: lfn under dosemu
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> Can you give a clue how to actually issue linux system calls within a
> plugin?

The plugin itself is part of the dosemu program, not part of the V86
box.  You can just call open() read() stat() etc.

As for getting to the plugin from your DOS program, you call int 0xE6
with a value in AH.  dosemu uses AH to select a plugin, and passes
control to it (in linux mode).  The code then has access to all the
registers and the DOS memory (it's mapped right into the linux process
space, at address zero!).

So all the TSR does (in my case) is hook int 0x21 and call int 0xe6 so
that the plugin gets to see every int 0x21 call.