Quite old but I do have the same problem. I like to create a assembler dll from C/C++ source. To test this I simply used the following function, which simply returns the instance:
__declspec(dllexport) HMODULE WINAPI Test()
{
return s_hDll;
}
Mangled name is ?Test@@YGPAUHINSTANCE__@@XZ
Which I then insert in the asm file as
?Test@@YGPAUHINSTANCE__@@XZ proc near
mov eax, s_hDll
ret
?Test@@YGPAUHINSTANCE__@@XZ endp
Sadly this doesn't work. Error is Unresolved external symbol as the topic of this thread!
Asm Dll code is the same as posted by vortex.
It works if I just name the function: Test proc near
But this will not be an option because I need C++ object orientation style exports. The caller depends on it and I can't change that...
Any help is very appreciated!
Seems to workable, MASM isn't further mangling it. If you use "FLAT, C" or "PROC C" it will add a leading underscore.
.386
.MODEL FLAT
.DATA
s_hDll dd ?
.CODE
?Test@@YGPAUHINSTANCE__@@XZ proc near public
mov eax, s_hDll
ret
?Test@@YGPAUHINSTANCE__@@XZ endp
END
Disassembly
00000000 ?Test@@YGPAUHINSTANCE__@@XZ:
00000000 A110000000 mov eax,[s_hDll]
00000005 C3 ret
00000010 s_hDll: ; Xref 00000000
00000010 00 00 00 00 ....
Plus you should be able to modify the exported names of a DLL by using a DEF file, or forward it to another function, with a different name, in another DLL for that matter.
Calling C++ functions from MASM (http://www.masm32.com/board/index.php?topic=5594.0)
Ah! I see with dumpbin: _?Test@@YGPAUHINSTANCE__@@XZ@0
ml adds "_" to the function names in the obj.
Working with SYSCALL! Thanks...