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