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.NET DllExport with .NET Core support (aka 3F/DllExport aka DllExport.bat)

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3F/DllExport

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.NET DllExport with .NET Core support (aka3F/DllExport akaDllExport.bat)

Build statusReleaseLicense

DllExport-help |gntDllExport

[DllExport("Init",CallingConvention.Cdecl)][DllExport(CallingConvention.StdCall)]// Cdecl is the default calling convention in .NET DllExport[DllExport("MyFunc")][DllExport]

Based onUnmanagedExports that was created by Robert Giesecke. Hispage.

.NET DllExport is adifferent project that was developed by Denis Kuzmin 「 ☕ 」

Copyright (c) 2009-2015  Robert GieseckeCopyright (c) 2016-2025  Denis Kuzmin <x-3F@outlook.com> github/3F

[Quick start ] [Examples: C++, C#, Java, ... ]-> {Wiki } {🧪 Demo }

Example of using DllExport +Conari:

[⏯]

[DllExport]// DllExportModifiedClassLibrary.dllpublicstaticIntPtrcallme(TCharPtrstr,IntPtrstructure){if(str!="Hello world!")returnIntPtr.Zero;structure.Native().f<int>("x","y").build(outdynamicv);if(v.x>v.y){structure.Access().write<int>(8);}returnnewNativeArray<int>(-1,v.x,1,v.y);}

[⏯]

...// host side via C/C++, Java, Rust, Python, ... or even same dotnet C#usingNativeString<TCharPtr>ns=new("Hello world!");usingNativeStruct<Arg>nstruct=new(newArg(){x=7,y=5});usingdynamicl=newConariX("DllExportModifiedClassLibrary.dll");IntPtrptr=l.callme<IntPtr>(ns,nstruct);usingNativeArray<int>nr=new(4,ptr);// (nstruct.Data.x == 8) != (nr[1] == 7)

For Lua, consider usingLuNari

[DllExport]publicstaticintentrypoint(IntPtrL){usingLua<ILua53>lua=new("Lua.dll");    ...lua.pushcclosure(L,onProc,0);lua.setglobal(L,"onKeyDown");LuaNumbernum=lua.tonumber<LuaNumber>(L,7);    ...}

.NET DllExport supports both Library (.dll) and Executable (.exe) PE modules.

How does it work

Current features has been implemented throughILDasm &ILAsm that prepares all the necessary steps via.export directive (it's part of the ILAsm compiler,not CLR).

What inside ? how does work the .export directive ?

Read about format PE32/PE32+, start with grammar from asmparse and move to writer:

...//yaccif(PASM->m_pCurMethod->m_dwExportOrdinal ==0xFFFFFFFF){  PASM->m_pCurMethod->m_dwExportOrdinal = $3;  PASM->m_pCurMethod->m_szExportAlias = $6;if(PASM->m_pCurMethod->m_wVTEntry ==0) PASM->m_pCurMethod->m_wVTEntry =1;if(PASM->m_pCurMethod->m_wVTSlot  ==0) PASM->m_pCurMethod->m_wVTSlot = $3 +0x8000;}...EATEntry*   pEATE =new EATEntry;pEATE->dwOrdinal = pMD->m_dwExportOrdinal;pEATE->szAlias = pMD->m_szExportAlias ? pMD->m_szExportAlias : pMD->m_szName;pEATE->dwStubRVA = EmitExportStub(pGlobalLabel->m_GlobalOffset+dwDelta);m_EATList.PUSH(pEATE);...// logic of definition of records into EXPORT_DIRECTORY (see details from PE format)HRESULTAssembler::CreateExportDirectory()  {...    IMAGE_EXPORT_DIRECTORY  exportDirIDD;    DWORD                   exportDirDataSize;    BYTE                   *exportDirData;    EATEntry               *pEATE;unsigned                i, L, ordBase =0xFFFFFFFF, Ldllname;    ...    ~ now we're ready to miracles ~ vtfxup thunk stubs and ~...

Read also my brief explanations here:AssemblyRef encoding /about mscoree /DllMain & the export-table /DllExport.dll /ordinals ...

How to get DllExport

Does DllExport support NuGet ?

Most likelyyes. But NuGet features arenot guaranteed (tl;dr something may not work or not work properly)

Use directlylatest stableDllExport.bat (~28 KB). ReadWiki

Read [Documentation ]

Build .NET DllExport from source

git clone https://github.com/3F/DllExport.git DllExportcd DllExport

Callbuild.bat to build final binaries likeDllExport.<version>.nupkg, Manager, tests, zip-archives, and related:

.\build Release

Note, this relies onvsSolutionBuildEvent scriptingif you're using Visual StudioIDE.

Modified IL Assembler

We're using3F's modified versions specially for.NET DllExport project

This helps to avoid some problemslike this, orthis, and more ...

To build minimal version:

.\build # ilasm -x64

Make sure you have installedCMake before build.

To build assembler and use exactly this compiled version withDllExport, command like:

.\build # ilasm -x64& .\build Release

Alternatively you can get official compiled versions viaNuGet

Or like:

.tools\gnt ILAsm& .\build Release
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