Comment 4 for bug 1882123

I pinpointed the exact commits which affected the regression.

[QEMU 4.2.0-rc0 : illegal hardware instruction]
- Introduced in commit af28822
https://github.com/qemu/qemu/commit/af2882289951e58363d714afd16f80050685fa29
The commit affected LDREX/STREX translation, and broke dotnet command from .NET Core SDK.

[QEMU 4.2.0-rc2 : .NET SEHException]
- Introduced in commit 655b026
https://github.com/qemu/qemu/commit/655b02646dc175dc10666459b0a1e4346fc8d46a
The commit fixes STREX a bit. As a result, dotnet command is now executable except JIT compiling.

I also tested lastest HEAD from the master, and it still has the SEHException regression.
(Tested commit is 66234fee9c2d37bfbc523aa8d0ae5300a14cc10e)