A successful attempt at 'escaping' wine.
While wine itself does not make any attempts at isolating processes from the linux environment, I have not found a handy way to access the linux OS.
To be exact, this means loading shared objects and accessing symbols using dlopen/dlsym from an all native windows component.
What this essentially does is to query the real pid (GetCurrentProcessId() is a lie 😢) by manually issuing the respective syscall.
From there, it searches the libc inside of /proc/[pid]/maps through the mapped filesystem.
Once that is found, it resolves dlsym and creates a calling convention wrapper.
The rest is a piece of cake 😃
Resolving dlsym was shamelessly copied from here: https://modexp.wordpress.com/2019/04/24/glibc-shellcode/#dlsym