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PAGE,132
;***************************************************************************
;*
;* DLLENTRY.ASM
;*
;* VER.DLL Entry code
;*
;* This module generates a code segment called INIT_TEXT.
;* It initializes the local heap if one exists and then calls
;* the C routine LibMain() which should have the form:
;* BOOL FAR PASCAL LibMain(HANDLE hInstance,
;* WORD wDataSeg,
;* WORD cbHeap,
;* LPSTR lpszCmdLine);
;*
;* The result of the call to LibMain is returned to Windows.
;* The C routine should return TRUE if it completes initialization
;* successfully, FALSE if some error occurs.
;*
;**************************************************************************
INCLUDE CMACROS.INC
externFP <LIBMAIN> ;The C routine to be called
ifndef SEGNAME
SEGNAME equ <_TEXT> ; default seg name
endif
createSeg %SEGNAME, CodeSeg, word, public, CODE
sBegin CodeSeg ; this defines what seg this goes in
assumes cs,CodeSeg
?PLM=0 ;'C'naming
externA <_acrtused> ;Ensures that Win DLL startup code is linked
?PLM=1 ;'PASCAL' naming
externFP <LOCALINIT> ;Windows heap init routine
cProc LibEntry, <PUBLIC,FAR> ;Entry point into DLL
cBegin
push di ;Handle of the module instance
push ds ;Library data segment
push cx ;Heap size
push es ;Command line segment
push si ;Command line offset
;** If we have some heap then initialize it
jcxz callc ;Jump if no heap specified
;** Call the Windows function LocalInit() to set up the heap
;** LocalInit((LPSTR)start, WORD cbHeap);
xor ax,ax
cCall LOCALINIT <ds, ax, cx>
or ax,ax ;Did it do it ok ?
jz error ;Quit if it failed
;** Invoke the C routine to do any special initialization
callc:
call LIBMAIN ;Invoke the 'C' routine (result in AX)
jmp short exit ;LibMain is responsible for stack clean up
error:
pop si ;Clean up stack on a LocalInit error
pop es
pop cx
pop ds
pop di
exit:
cEnd
sEnd _thisseg
END LibEntry
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