SANO,Masatoshi aa0fa1c56e Add ARM64 Windows platform support ... Add complete ARM64 Windows (AArch64 WoA) support to SBCL. This enables building and running SBCL natively on Windows 11 ARM devices. Key design decisions: - x18 register reserved as TEB pointer (Windows ARM64 ABI requirement), matching the existing Darwin reservation - Safepoint GC with fake_foreign_function_call to save register context for precise stack scanning (ARM64 uses separate C and control stacks) - VEH (Vectored Exception Handling) for ARM64, decoding BRK instructions which Windows reports as EXCEPTION_ILLEGAL_INSTRUCTION - sb_udivmodti4 takes hi/lo split arguments to avoid __uint128_t ABI issues on LLP64 where unsigned long is 32 bits - FP exception traps disabled (ARM64 Windows does not deliver FP exceptions even with FPCR trap bits set) - Dynamic space pages committed on demand (Windows reserves but does not commit the full dynamic space upfront) New files: - src/runtime/Config.arm64-win32: Build configuration - src/runtime/arm64-win32-os.c: OS layer (VEH, context access, FP) - src/runtime/arm64-win32-os.h: Platform header - .github/workflows/windows-arm64.yml: CI workflow Modified files grouped by subsystem: Runtime (ARM64-specific): - arm64-arch.c: Windows memory APIs, LLP64-safe pointer storage, sb_udivmodti4 split-argument ABI, static space NIL header guard - arm64-assem.S: Windows calling conventions for call_into_lisp and call_into_c, TlsGetValue for thread pointer, x18 reservation Runtime (Windows general): - win32-os.c: ARM64 safepoint page handling, BRK exception decode, ARM64 VEH, dynamic space page commit, ARM64 debug printing Compiler: - vm.lisp: Reserve x18 on Windows (matching Darwin) - c-call.lisp: Don't zero control-stack-pointer on Windows (not FFCA) - parms.lisp: Address space layout for Windows ARM64 - tramps.lisp: Save CSP to thread for GC, don't zero CSP on Windows - genesis.lisp: GC_SAFEPOINT_PAGE_ADDR for non-x86-64 platforms - parms.lisp (generic): Update safepoint space comment - debug-int.lisp: NFP handling for ARM64 Windows - float-trap.lisp: Disable FP traps on ARM64 Windows - coreparse.c: ARM64 guard for TEXT_SPACE_START assignment Build system: - make-config.sh: ARM64 Windows detection and feature flags - make-windows-installer.sh: ARM64 architecture in installer CI: - linux-arm64.yml, mac.yml: Robustness fixes for repo naming - windows-arm64.yml: New workflow for ARM64 Windows builds Tests: - subr.sh: Auto-detect sbcl.exe on Windows Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>		2026-02-12 21:44:09 +03:00
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workflows	Add ARM64 Windows platform support	2026-02-12 21:44:09 +03:00