[Bug 33159] Loading a .dll without relocations fails under Mac OS X ( needs preloader)

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=33159

--- Comment #22 from Sebastian Lackner <sebastian at fds-team.de> ---
Starting with Wine Staging 2.10 we have added an experimental preloader
implementation for macOS. So far we have only tested it on a small subset of
macOS versions, so please give it a try and report any issues you encounter. If
you use official Wine Staging builds, the preloader will be enabled by default.

----

Michael Müller has prepared various executables for testing purposes (
http://fds-team.de/~michael/osx-preloader-test.tar.gz ), which test specific
functions of the preloader. The tarball provides the following testcases:

> wine test-win.exe

A Windows executable without relocation information, which should fail to load
without this patch. It simply prints "Success!" when everything is working as
expected. When you give it a try, please also check that that there are no
warnings related to the preloader (especially no failures to allocate reserved
areas).

> wine-preloader test-main
> wine64-preloader test-main64

MacOS binaries with LC_MAIN entrypoint. If everything works as expected, they
will print "wine_main_preload_info not found", and afterwards dump the
argv/envp and apple data arguments passed to the main() function.

> wine-preloader test-unix
> wine64-preloader test-unix64

MacOS binaries with LC_UNIXTHREAD entrypoint. If everything works as expected,
they will print "wine_main_preload_info not found", and afterwards dump the
argv/envp and apple data arguments passed to the main() function.

----

If you encounter any issues with the preloader, and you want to disable it for
testing purposes, you can simplify remove execute permissions of the file.

chmod -x wine-preloader
chmod -x wine64-preloader

Please be aware that the introduction of the preloader also required other
changes, so this will not necessarily give the same results as Wine compiled
without the patchset.

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