FEX 2112 Tagged!

A lot of changed things this month.

• New instructions & fixes (BZHI, MULX, RORX, SARX/SHLX/SHRX)
• steamwebhelper now works
• Linux emulation updated to 5.16, sched_getaffinity, MAP_32BIT, 32-bit DRM emulation improvements
• Several other bug fixes and optimizations

Arm64

• Reduce the chance of hanging on reentrant allocations (8ab6830f)
• Adds an inline syscall optimization (f7468703)
• COND_FGT should map to gt, not hi, as it is not FGTU (b45603d1)
  • Fixes steamwebhelper burning all CPU cores!

FEXCore

• Fixes CompileService race condition on thread creation (5345f7fa)
• Centralize alignment utility functions in one header (966272ce)
• Fixes ERROR_AND_DIE (fbd14b65)
• Supports guest SIGILL (6e1ea92c)
• CPUID
  • Call handler functions directly (ffee22d3)
• OpcodeDispatcher
  • Remove debug message (d883b4bf)
  • Implement BZHI (50c8d9ed)
  • Amend return types of BitSize helpers (c63c5fb6)
  • Implement MULX (498a845c)
  • Resolve sign mismatches in loops (ad864e0e)
  • Add helper for getting bit sizes (3a3cbf2b)
  • Handle RORX (51d21d86)
  • Implement BMI2 SARX/SHLX/SHRX (e37a0bbd)
  • Removes usage of SignalFrame stack on JITs (d81d5e21)
  • Use std::vector as the underlying container for std::stack (61ccec37)
  • Partial support for RIP adjust in signal handler (77093a7f)
  • Resolve unused variable warnings (a04cc4dc)
• OpcodeDecoder
  • Shorten up GPR and MM base offset retrieval (59ed91c5)
  • Convert enums into enum classes where applicable (d1fa8bcf)
  • Add support for ADX (d3cd354c)
• Frontend
  • Handle VEX RXB bits (d47182b6)
  • Mark modrm function LUT as static (c6662a46)
• GDBStub
• Fixes a few hangs and crashes (e027b83a)
• Interpreter
  • Build op handler table at compile-time (63f9e0b4)
  • Mark F80CMP array as static constexpr (13ad5b66)
• JIT
  • Eliminate redundant jump target map lookups (8ef02783)
  • Ensures signals in compileservice JIT space is handled (97e3a364)
• JitSymbols
  • Make use of fmt (db0740be)
• IR
  • Make some interface functions accept pointers to const (8c38f936)
  • Convert NodeID into a strong type (b93871ff)
  • Add type alias for Node IDs (1f306d66)
• RegisterAllocationPass
  • Resolve sign comparison mismatch in CalculateNodeInterference() (597e4e1d)
  • Reduce usages of NodeIDs where applicable (19a06519)

Linux

• Updates syscalls to 5.16 syscalls (c4d05fb8)
• Fixes sched_getaffinity (d5bf6414)
• Fixes MAP_32BIT error case (92ae6ae2)
• Fixes sigprocmask with new and old set being the same address (7bb78912)
• Passthrough 32-bit syscalls that can be (3dc938b8)
• Emulate MAP_32BIT on mmap (081d0169)
• SignalDelegator update signal mask on return from sigsuspend (90511ddd)
• Updates 32-bit DRM emulation (a92233c7)

Thunks

• Fail loudly if thunking is enabled for a library that isn’t installed (b1b61608)
• ThunksDB
  • Updates file to include local libs (e0d40dd4)

Tests

• Enables 32-bit host runner (cabb58ad)
• Minor cleanup (2a894bc1)
• Various thunk library cleanups (3730a428)

Misc

• BucketList
  • Minor API touchups (baadf0b9)
• CMake
  • Adds option to enable time-trace compile option (919e2bc3)
• CompileService
  • Store WorkItem instances as unique_ptr (ef772c3e)
• ELFCodeLoader
  • Fixes BRK allocation on some ELF loading (b327daf5)
• EnumUtils
  • Remove shift operators from helper macro (977d92b7)
• General
  • Migrate logging over to fmt where possible (513b02fd)
• RootFS
  • Keep rootfs around while in container (16f1ad46)
• IR.json/json_ir_generator: Minor touchups to generated IR utilities (9b43f94f)
• Various packaging improvements (23e583e1)

Frontend

• Adds Socket logger and tool (6c93b6f7)
• FEXLoader
  • Change 32-bit memory check error to warning (82ebdf52)
  • Print memory map when 32-bit intersect happens (e6d285a7)
• Syscalls
  • Move construction of syscall name map into GetSyscallName() (0560e9be)

See the 2112 Release Notes or the detailed change log in Github.