[Bug 37034] Stars!: Crashes on startup

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=37034

--- Comment #7 from Ken Thomases <ken at codeweavers.com> ---
(In reply to planetbeing from comment #6)

> The linker creates an executable with the WINE_DOS segment at 0x1000. On
> load of the executable, dyld adds a slide to executable marked MH_PIE.

> It's still useful to define
> the linker segments to prevent the rest of the code from ever being placed
> too low, but the actual reservation must happen at non-slid addresses (at
> least for WINE_DOS, not sure if WINE_SHAREDHEAP has specific address
> requirements).

No, it's not useful.  The WINE_DOS segment is not just used to make sure no
other part of the wineloader gets put too low, but that nothing else that gets
loaded or initialized before main() gets put there, either.  The WINE_DOS
segment really has to be put at 0x1000 or we might as well not have it at all.


> It's possible to fix this with -Wl,-no_pie but that seems to me to be
> needlessly removing a security mitigation.

Wine needs to be loaded at a specific address.  That's why, for example, it
uses "-image_base 0x7bf00000".  I don't think ASLR is acceptable for Wine.

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