223 lines
6 KiB
NASM
223 lines
6 KiB
NASM
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PAGE 58,132
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;******************************************************************************
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TITLE bwinexec.asm - WinExec with binary command line
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;******************************************************************************
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;
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; Copyright (C) Microsoft Corporation 1985-1990. All rights reserved.
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;
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; Title: bwinexec.asm - Exec. an app. with a block of binary data.
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;
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; Version: 1.00
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;
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; Date: 14-Mar-1990 (from winexec)
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;
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; Author: ROBWI
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;
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;------------------------------------------------------------------------------
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;
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; Change log:
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;
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; DATE REV DESCRIPTION
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; ----------- --- -----------------------------------------------------------
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; 14-Mar-1990 RJW Modified Toddla's WinExec code to take a binary command
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; block instead of an ascii command line
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;
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;==============================================================================
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?PLM=1
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?WIN=0
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PMODE=1
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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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externFP LoadModule
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EXECBLOCK struc
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envseg dw ? ; seg addr of environment
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lpcmdline dd ? ; pointer to command block (normally ascii str)
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lpfcb1 dd ? ; default fcb at 5C
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lpfcb2 dd ? ; default fcb at 6C
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EXECBLOCK ends
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; The following structure should be used to access high and low
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; words of a DWORD. This means that "word ptr foo[2]" -> "foo.hi".
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LONG struc
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lo dw ?
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hi dw ?
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LONG ends
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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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sBegin CodeSeg
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assumes cs,CodeSeg
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assumes es,nothing
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assumes ds,nothing
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;****************************************************************************
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;
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; @doc INTERNAL MMSYSTEMS
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;
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; @api HANDLE | BWinExec | This function executes the Windows
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; or non-Windows application identified by the <p lpCmdLine>
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; parameter. The <p nCmdShow> parameter specifies the initial
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; state of the applications main window when it is created.
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;
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; @parm LPSTR | lpModuleName | Far pointer to a null-terminated
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; character string that contains the filename of the
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; application to run. See <f LoadModule> for more info.
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;
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; @parm WORD | nCmdShow | Specifies how the application is shown.
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; See <f ShowWindow> for valid values.
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;
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; @parm LPVOID | lpParameters | Specifies a far pointer to a block
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; of data which will be passed to the application as a cmd
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; tail. The first byte of the block must be the length of the
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; data and must be less than or equal to 120.
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;
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; @rdesc The return value identifies the instance of the loaded module if
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; the function was successful. Otherwise, it is a value less than
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; 32 that specifies the error. See <f LoadModule> for valid
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; error values.
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;
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; @xref LoadModule WinExec
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;
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;============================================================================
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cProc BWinExec, <FAR,PUBLIC,NODATA>,<si,di>
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parmD lpszFile ; Pathname ptr
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parmW wShow ; Mode flag
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parmD lpParameters ; Cmd Line Data
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LocalV szCommand, 128 ; ASCIIZ Name of program to exec
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LocalV szParm, 128 ; DOS version of parameters
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LocalB szParmLen ; DOS parm length
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LocalB bDotFound ; Non-zero if a period is in the string
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LocalV loadparams, %(SIZE EXECBLOCK)
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LocalV rOF, %(SIZE OPENSTRUC)
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LocalD FCB1
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cBegin
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mov byte ptr szParm,0Dh
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mov szParmLen,0 ; Init to zero length, Line feed
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; Copy first part of line into szCommand.
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lds si,lpszFile
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mov ax,ss
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mov es,ax
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lea di,szCommand
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xor al,al
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mov bDotFound,al
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; Loop until a blank or NULL is found.
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WELoop1:
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lodsb
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cmp al,' ' ; Exit loop if blank or NULL
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je WECont1
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or al,al
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je WECont1
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cmp al,'.'
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jne WELoopCont
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mov bDotFound,al
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WELoopCont:
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stosb
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jmp short WELoop1
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WECont1:
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; Does the command have an extension?
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cmp bDotFound,0
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jne WEHasExt
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mov ax,0452Eh ;'.E'
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stosw
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mov ax,04558h ;'XE'
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stosw
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WEHasExt:
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xor ax,ax ; NULL terminate string
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stosb
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lds si,lpParameters
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mov ax, ds
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or ax, si ; NULL Parameter block?
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jz WEExec ; Y: exec
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; Copy Parameter Block into szParm.
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lea di, szParmLen
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lodsb
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xor cx,cx
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mov cl, al
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push dx ; truncate to legal length!
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mov ax, 78h
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sub ax, cx
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cwd
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and ax, dx
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add cx, ax ; length + 1 in cx
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pop dx
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mov al, cl
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stosb
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dec cx
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cld
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rep movsb
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; Terminate it with a linefeed.
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mov al,0Dh
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stosb
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; Set up the FCBs.
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WEExec:
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mov word ptr FCB1[0],2 ; FCB1[0] = 2;
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mov ax,wShow ; FCB1[1] = wShow;
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mov word ptr FCB1[2],ax
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xor ax,ax
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mov loadparams.envseg,ax ; loadparms.segEnv = 0;
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mov loadparams.lpfcb2.lo,ax ; loadparms.lpFCB2 = (LPSTR)NULL;
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mov loadparams.lpfcb2.hi,ax
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lea ax,szParmLen ; loadparms.lpCmdLine = (LPSTR)ach;
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mov loadparams.lpCmdLine.lo,ax
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mov loadparams.lpCmdLine.hi,ss
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lea ax,FCB1 ; loadparms.lpFCB1 = (LPSTR)fcb1buf;
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mov loadparams.lpfcb1.lo,ax
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mov loadparams.lpfcb1.hi,ss
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; Exec the progam.
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lea dx,szCommand ; ds:ax == ptr to file to exec
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lea bx,loadparams ; es:bx == ptr to param block
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if 1
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cCall LoadModule, <ss,dx, ss,bx> ; return ax=hInstance, dx=hTask
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cmp ax,32
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jb @f
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mov ax,dx ; return hTask
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@@:
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else
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mov ax,ss
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mov ds,ax
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mov ax,4B00h ; dos exec
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int 21h
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endif
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cEnd
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sEnd CodeSeg
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end
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