;********************************************************************************************************************************
;*																																*
;*	File: Core.asm																												*
;*																																*
;*	This file defines the entry point into the <Core> of PwnOS, and includes the rest of the <Core>.							*
;*																																*
;*	See Also:																													*
;*		- <Core.inc>																											*
;*		- <Sync>																												*
;*		- <Memory>																												*
;*		- <Threads>																												*
;*		- <Messages>																											*
;*		- <I/O>																													*
;*		- <Files>																												*
;*																																*
;*	Authors:																													*
;*		- Neil G. Dickson																										*
;*																																*
;*	Compiling:																													*
;*		Assemble	- $MASM$\ML.EXE /Fl /c /Cp /nologo $this$																	*
;*		Link		- $JLOC$\JLOC.EXE BootCore.loc "..\Compiled\BootCore.bin" "..\Boot\BootCore.map"							*
;*																																*
;********************************************************************************************************************************


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;                                                                               ::::::


.686p
.xmm
OPTION language:stdcall

include Core.inc

;********************************************************************************************************************************
;*																																*
;*	Segment: CoreData																											*
;*																																*
;*	This is the segment containing all data for <Core>, spread across many files.												*
;*																																*
;********************************************************************************************************************************
CoreData	segment	use32 page

;********************************************************************************************************************************
;*																																*
;*	Variable: ThreadSchedulerTSS																								*
;*																																*
;*	This is the special <TSS32> of the <ThreadScheduler> task.																	*
;*																																*
;*	This must be first in the CoreData segment so that its address can be hardcoded in its TSS descriptor (see <GDT>).  It		*
;*	doesn't need an entire <EXTENDEDTSS>, because <ThreadScheuler> doesn't request its own thread info or use FPU/SSE/MMX.		*
;*																																*
;********************************************************************************************************************************
ThreadSchedulerTSS	TSS32			<>

;********************************************************************************************************************************
;*																																*
;*	Variable: CallVectors																										*
;*																																*
;*	This is the <CALLVECTORLIST> structure containing the addresses to all <Core> functions acessible from <Libraries>, indexed	*
;*	by <Core Call Gate Constants>.																								*
;*																																*
;********************************************************************************************************************************
CallVectors			CALLVECTORLIST	<>		

;********************************************************************************************************************************
;*																																*
;*	Variable: CoreAccessFlags																									*
;*																																*
;*	Bits used to lock access to certain areas of the <Core> (e.g. <ThreadScheduler> can only have one processor at a time).		*
;*																																*
;*	See Also:																													*
;*		- <Core Access Flag Constants>																							*
;*																																*
;********************************************************************************************************************************
CoreAccessFlags		dword			0

CoreData	ends

;********************************************************************************************************************************
;*																																*
;*	Segment: CoreCode																											*
;*																																*
;*	This is the segment containing all code remaining after initialization for <Core>, spread across many files.				*
;*																																*
;********************************************************************************************************************************
CoreCode	segment	use32
ASSUME CS:CoreCode,DS:CoreData,ES:CoreData,FS:CoreData,GS:CoreData,SS:CoreData

;********************************************************************************************************************************
;*																																*
;*	Procedure: CoreCallGate																										*
;*																																*
;*	Entry point into the <Core> from <Libraries>.  eax contains one of the <Core Call Gate Constants>.							*
;*																																*
;*	To call this from <Libraries>, use the <CALL_CORE> macro.  This must be first in the CoreCode segment to ensure that its	*
;*	address can be hardcoded as a constant in the call gate descriptor and <CALL_CORE> (see <GDT>).								*
;*																																*
;<*******************************************************************************************************************************
CoreCallGate	proc	far
	cmp		eax,NUM_CALL_GATES
	jnb		InvalidCallNum
	call	dword ptr CallVectors[eax*4]
	retf									;automatically retf due to "proc far", but make it explicit
InvalidCallNum:
;	TestOutputVar	"Invalid Call Gate #",eax
	jmp		$
CoreCallGate	endp

;>*******************************************************************************************************************************

CoreCode	ends

include	Sync\Sync.asm
include	Sync\Time.asm
include	Memory\Memory.asm
include	Memory\HeapMemory.asm
include	Memory\PageFile.asm
include	Memory\MiscMemory.asm
include	Threads\Processes.asm
include	Threads\Threads.asm
include	Threads\ThreadScheduler.asm
include	IO\IO.asm
include	Files\Files.asm

include	Init.asm

echo Error if CoreCode is greater than 512KB
end