wine modules

[Alex Henrie]

On Thu, Apr 14, 2022 at 9:26 AM Eric Pouech <eric.pouech at orange.fr> wrote:
>
> I tried to write down what I grasped for the current modules' evolution
>
> since there's always questions floating around this subject, might be worthwhile to document it a bit

Thank you very much for the documentation! Please be sure to put it on the wiki.

> Currently, the 32 <> 64 bit is still duplicated:
>
>   +-----------------+           +------------------------+                +--------------------+
>   | FOOBAR.dll (PE) |           | FOOBAR.so (ELF 64 bit) | -------------> | ntdll.so (64 bit)  |
>   | 64 bit          | --------> | (unixlib 64 bit)       | ELF dyn link   +--------------------+
>   |                 |           |                        | -------------> | helper.so (64 bit) |
>   +-----------------+           +------------------------+                +--------------------+
>
>   +-----------------+           +------------------------+                +--------------------+
>   | FOOBAR.dll (PE) |           | FOOBAR.so (ELF 32 bit) | -------------> | ntdll.so (32 bit)  |
>   | 32 bit          | --------> | (unixlib 32 bit)       | ELF dyn link   +--------------------+
>   |                 |           |                        | -------------> | helper.so (32 bit) |
>   +-----------------+           +------------------------+                +--------------------+
>
> When all modules are converted to the new scheme, this shall look like:
>
>   +-----------------+           +------------------------+                +--------------------+
>   | FOOBAR.dll (PE) |           | FOOBAR.so (ELF 64 bit) | -------------> | ntdll.so (64 bit)  |
>   | 64 bit          | --------> | (unixlib    )          | ELF dyn link   +--------------------+
>   |                 |    +----> | (64 + 32 bit)          | -------------> | helper.so (64 bit) |
>   +-----------------+    |      +------------------------+                +--------------------+
>                          |
>   +-----------------+    |
>   | FOOBAR.dll (PE) |    |
>   | 32 bit          | ---+
>   |                 |
>   +-----------------+
>
> This will require that FOOBAR.so correctly handles the "syscall" for both 32 bit
> and 64 bit unixlib calls.
> When this is in place, no support for 32-bit .so files will be necessary (both
> the packages that provide the .so files, but also for the development packages.

This part is still confusing to me. Do any DLLs currently use the new
scheme? How can I know which of the two schemes a DLL uses?

-Alex