189 lines
4.3 KiB
NASM
189 lines
4.3 KiB
NASM
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page ,132
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;-----------------------------Module-Header-----------------------------;
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; Module Name: LIBINIT.ASM
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;
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; library stub to do local init for a Dynamic linked library
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;
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; Created: 06-27-89
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; Author: Todd Laney [ToddLa]
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;
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; Exported Functions: none
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;
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; Public Functions: none
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;
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; Public Data: none
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;
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; General Description:
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;
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; Restrictions:
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;
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; This must be the first object file in the LINK line, this assures
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; that the reserved parameter block is at the *base* of DGROUP
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;
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;-----------------------------------------------------------------------;
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?PLM=1 ; PASCAL Calling convention is DEFAULT
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?WIN=1 ; Windows calling convention
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.286
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.xlist
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include cmacros.inc
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; include windows.inc
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.list
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ifndef SEGNAME
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SEGNAME equ <_TEXT>
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endif
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createSeg %SEGNAME, CodeSeg, word, public, CODE
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;-----------------------------------------------------------------------;
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;
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; externs from KERNEL
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;
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externFP <LocalInit>
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externFP <FatalAppExit>
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;-----------------------------------------------------------------------;
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;
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; LibMain is the function in C code we will call on a DLL load.
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; it is assumed in the same segment as we are.
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;
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;;;;;;;;externNP <LibMain>
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externFP <LibMain> ;; Use this line if LibMain is far call
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;-----------------------------------------------------------------------;
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;
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; Stuff needed to avoid the C runtime coming in, and init the windows
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; reserved parameter block at the base of DGROUP
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;
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sBegin Data
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assumes DS,Data
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org 0 ; base of DATA segment!
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DD 0 ; So null pointers get 0
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maxRsrvPtrs = 5
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DW maxRsrvPtrs
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usedRsrvPtrs = 0
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labelDP <PUBLIC,rsrvptrs>
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DefRsrvPtr MACRO name
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globalW name,0
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usedRsrvPtrs = usedRsrvPtrs + 1
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ENDM
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DefRsrvPtr pLocalHeap ; Local heap pointer
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DefRsrvPtr pAtomTable ; Atom table pointer
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DefRsrvPtr pStackTop ; top of stack
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DefRsrvPtr pStackMin ; minimum value of SP
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DefRsrvPtr pStackBot ; bottom of stack
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if maxRsrvPtrs-usedRsrvPtrs
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DW maxRsrvPtrs-usedRsrvPtrs DUP (0)
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endif
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public __acrtused
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__acrtused = 1
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sEnd Data
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;-----------------------------------------------------------------------;
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sBegin CodeSeg
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assumes cs,CodeSeg
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;--------------------------Private-Routine-----------------------------;
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;
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; LibEntry - called when DLL is loaded
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;
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; Entry:
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; CX = size of heap
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; DI = module handle
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; DS = automatic data segment
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; ES:SI = address of command line (not used by a DLL)
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;
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; Returns:
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; AX = TRUE if success
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; Error Returns:
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; AX = FALSE if error (ie fail load process)
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; Registers Preserved:
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; SI,DI,DS,BP
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; Registers Destroyed:
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; AX,BX,CX,DX,ES,FLAGS
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; Calls:
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; None
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; History:
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;
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; 06-27-89 -by- Todd Laney [ToddLa]
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; Created.
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;-----------------------------------------------------------------------;
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assumes ds,Data
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assumes es,nothing
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cProc LibEntry,<FAR,PUBLIC,NODATA>,<>
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cBegin
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ifdef DEBUG
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;
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; if this module is not linked first the reserved parameter block
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; will not be initialized correctly, check for this and
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;
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lea ax,pLocalHeap
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cmp ax,6
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je RsrvPtrsOk
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RsrvPtrsHosed:
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int 3
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lea ax,RsrvPtrsMsg
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cCall FatalAppExit,<0,cs,ax>
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jmp RsrvPtrsOk
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RsrvPtrsMsg:
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db 'RsrvPtrs hosed!',0
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RsrvPtrsOk:
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endif
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;
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; Push frame for LibMain (hModule,cbHeap,lpszCmdLine)
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;
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push di
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push cx
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push es
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push si
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;
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; Init the local heap (if one is declared in the .def file)
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;
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jcxz no_heap
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cCall LocalInit,<0,0,cx>
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no_heap:
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cCall LibMain
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cEnd
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;--------------------------Exported-Routine-----------------------------;
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;
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; WEP()
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;
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; called when the DLL is unloaded, it is passed 1 WORD parameter that
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; is TRUE if the system is going down, or zero if the app is
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;
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; WARNING:
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;
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; This function is basicly useless, you cant can any kernel function
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; that may cause the LoadModule() code to be reentered..
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;
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;-----------------------------------------------------------------------;
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assumes ds,nothing
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assumes es,nothing
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cProc WEP,<FAR,PUBLIC,NODATA>,<>
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ParmW WhyIsThisParamBogusDave?
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cBegin
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cEnd
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sEnd CodeSeg
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end LibEntry
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