[Bug 93425] d3dadapter.so (gallium-nine) segfaults since Mesa 11.0/LLVM 3.7 - bugzilla-daemon

From: bugzilla-daemon@freedesktop.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 93425] d3dadapter.so (gallium-nine) segfaults since Mesa 11.0/LLVM 3.7
Date: Sun, 20 Dec 2015 09:07:38 +0000	[thread overview]
Message-ID: <bug-93425-502-QXayDTPle3@http.bugs.freedesktop.org/> (raw)
In-Reply-To: <bug-93425-502@http.bugs.freedesktop.org/>

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https://bugs.freedesktop.org/show_bug.cgi?id=93425

--- Comment #8 from Christoph Haag <haagch@frickel.club> ---
Created attachment 120603
  --> https://bugs.freedesktop.org/attachment.cgi?id=120603&action=edit
disassembled release build with -mstackrealign

Here is my release build with -mstackrealign that works:

http://haagch.frickel.club/files/lib32-llvm-libs-svn-256101-1-x86_64.pkg.tar.gz
http://haagch.frickel.club/files/lib32-llvm-svn-256101-1-x86_64.pkg.tar.gz

They are compiled with -march=native for my ivy bridge cpu, so maybe that has
some influence.

Disassembling the same function shows different offsets for movaps:

   0x0047a805 <+69>:    movaps %xmm0,-0x48(%ebp)

   0x0047a815 <+85>:    movaps %xmm0,-0x38(%ebp)

You can check with

gdb -q /usr/lib32/libLLVM-3.8svn.so -ex "disassemble
LLVMAddTargetDependentFunctionAttr"

Probably:
movaps %xmm0,-0x48(%ebp) is right
movaps %xmm0,-0x40(%ebp) is wrong

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