Fixes#2560
This was a forgotten member of the context that needs to be saved and
restored when jumping around the signal state.
When FEX was receiving signals back to back, there was a chance that the
signals would ride the edge of having set `InSyscallInfo` in the JIT,
which meant the SRA state would get saved once, then another signal
would occur with the previous SRA data, saving SRA again. Then when
unwinding the frames it would corrupt the SRA registers. This would
result in trying to load SRA state that was no longer valid, looking
like a crash in the JIT that was hard to see what happens.
Should also make Mono games a little less crash happy.
Cleans up CPUState memcpy as well, since it was a little weird looking.
There are a handful of siginfo layout types. To determine which layout
to use we need to check a combination of si_code and signal number
because each one in isolation doesn't explain the layout type.
Once the layout is calculated then calculate the siginfo using that
layout type. Adds a couple of different layout types to our guest
siginfo_t to handle the previously missing types.
This is a very OS specific operation and it living in FEXCore doesn't
make much sense. This still requires some strong collaboration between
FEXCore and the frontend but it is now split between the locations.
There's still a bit more cleanup work that can be done after this is
merged, but we need to get this burning fire out of the way.
This is necessary for llvm-mingw, this requires all previous PRs to be
merged first.
After this is merged, most of the llvm-mingw work is complete, just some
minor cleanups.
To be merged first:
- #2602
- #2604
- #2605
- #2607
- #2610
- #2615
- #2619
- #2621
- #2622
- #2624
- #2625
- #2626
- #2627
- #2628
- #2629
Ryan Houdek