BMI1 is now fully supported, several linux emulation fixes, thunk cleanups, initialization optimizations and several other assorted improvements.

Core

• BMI1 extension is now supported!
  • Exposed in CPUID
• Interpreter is split in to multiple files for usability
• Improved memory efficiency of some IR ops
• Allow grouping JIT symbols by library region
  • Useful for thunking performance introspection

CPUID

• Expose BMI1
• Expose Hybrid flag
  • Only if running on an ARM big.LITTLE CPU combination

Linux Emulation

• Fixes to execve handling with softlinks
  • Fixes issues with Debian alternatives soft links failing to find binaries
• Implements 32-bit virtio ioctls
  • Allows OpenGL passthrough in VMs for 32-bit applications
• No longer do magic SIGCHLD handling
  • Signal flags already setup correctly, just pass through

Thunks

• Respect DESTDIR environment variable
  • Useful to generate installation package
• XCB, Vulkan, and DRM cleanups

Misc

• Fixes a couple environment variable options not respecting textual names
• Some FMT changes
• Some Optimizations in x86Tables with constexpr
• Telemetry for when an application tears an atomic value
  • Can be used to diagnose emulation bugs
• FEXConfig fix for 100% CPU usage
  • glibc 2.34 behaviour change exposing an application bug
• Allocator reserving top 128TB of VA space on Arm64
  • Linux only gives userspace 47-bit addresses
  • Minor bug fix in golang

See the 2111 Release Notes or the detailed change log in Github.