[Bug 48161] AION (32bit) crashes (needs -fcf-protection disabled)

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=48161

--- Comment #24 from Paul Gofman <gofmanp at gmail.com> ---
I've tested this with 5.0rc2 Winehq Fedora 31 and Ubuntu EOAN builds.

The issue looks solved with Fedora 31, AION 32 bit now starts normally with it.

There is still some problem with Ubuntu binaries. I get the following error in
the terminal:

*** stack smashing detected ***: <unknown> terminated

Copying just ntdll.dll.so (32 bit) from Fedora 31 binaries solves the issue
with Ubuntu binaries. My initial guess it might have something to do with these
stack protection checks (using NtProtectVirtualMemory function just as an
example):

7bcd8b00 <NtProtectVirtualMemory@@Base>:
7bcd8b00:    8b ff                    mov    %edi,%edi
7bcd8b02:    55                       push   %ebp
7bcd8b03:    8b ec                    mov    %esp,%ebp
7bcd8b05:    5d                       pop    %ebp

...

7bcd8b37:    65 8b 0d 14 00 00 00     mov    %gs:0x14,%ecx
7bcd8b3e:    89 4d e4                 mov    %ecx,-0x1c(%ebp)
7bcd8b41:    31 c9                    xor    %ecx,%ecx

...

7bcd8bd2:    74 24                    je     7bcd8bf8
<NtProtectVirtualMemory@@Base+0xf8>
7bcd8bd4:    8b 45 e4                 mov    -0x1c(%ebp),%eax
7bcd8bd7:    65 33 05 14 00 00 00     xor    %gs:0x14,%eax
7bcd8bde:    0f 85 a0 02 00 00        jne    7bcd8e84
<NtProtectVirtualMemory@@Base+0x384>
...


7bcd8e84:    e8 fc ff ff ff           call   7bcd8e85
<NtProtectVirtualMemory@@Base+0x385>
7bcd8e89:    8d b4 26 00 00 00 00     lea    0x0(%esi,%eiz,1),%esi

...

These checks are absent in Fedora build which works fine.

I am not familiar with Ubuntu build specifics, and could not find the build
logs by the link above (presumably I have missed something, but I could not see
any logs among the downloadable files I found by the link). If I knew the
complete list of build flags used I could guess which flag is responsible.

Strictly speaking, it is not the "fcf-protection" issue anymore and might be a
separate bug as such, but it is still probably about incompatible build
options.

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