Support thread_local on the EE with emulated TLS #4

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techwritescode merged 2 commits from emulated-tls into main 2026-10-11 15:53:44 +00:00

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techwritescode commented 2026-10-11 15:20:08 +00:00

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The R5900 has no rdhwr, so native MIPS TLS cannot fetch a thread pointer. Build the EE with -femulated-tls instead.

• Pass -femulated-tls from the EE driver config and the libc++ build.
• New step 08 adds compiler-rt's emutls.o to the EE builtins archive (compiler-rt leaves it out of baremetal builds).
• Build libc++abi's __cxa_thread_atexit so thread_local objects with destructors link and run them at thread exit.
• README note.

Depends on the ps2/llvm PR for the libc++abi change; merge that into r5900-ee first. Tested in PCSX2 and on a real console. Tracks PS2-105.

🤖 Generated with Claude Code

The R5900 has no rdhwr, so native MIPS TLS cannot fetch a thread pointer. Build the EE with -femulated-tls instead. - Pass -femulated-tls from the EE driver config and the libc++ build. - New step 08 adds compiler-rt's emutls.o to the EE builtins archive (compiler-rt leaves it out of baremetal builds). - Build libc++abi's __cxa_thread_atexit so thread_local objects with destructors link and run them at thread exit. - README note. Depends on the ps2/llvm PR for the libc++abi change; merge that into r5900-ee first. Tested in PCSX2 and on a real console. Tracks PS2-105. 🤖 Generated with [Claude Code](https://claude.com/claude-code)

techwritescode added 1 commit 2026-10-11 15:20:08 +00:00

Support thread_local on the EE with emulated TLS ... 649fe757c3

The R5900 has no rdhwr, so native MIPS TLS cannot fetch a thread pointer.
Build the EE with -femulated-tls, add compiler-rt's emutls.o to the EE
builtins archive (step 08), and build libc++abi's __cxa_thread_atexit so
thread_local objects with destructors link and run their destructors at
thread exit.

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>

techwritescode added 1 commit 2026-10-11 15:25:52 +00:00

CI: build the toolchain on the llvm-build-host runner ... 1ceef3c3c4

The native Linux build and the Windows cross build are the long jobs; run
them on the dedicated runner. The packaging jobs stay on the shared one.

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>

techwritescode force-pushed emulated-tls from 1ceef3c3c4 to 2fd0165b24 2026-10-11 15:30:31 +00:00 Compare

techwritescode added 1 commit 2026-10-11 15:38:11 +00:00

Make the emutls scripts executable ... 4741a54ef9

The step runner executes steps directly; the new files were committed
without the executable bit, which failed the CI build.

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>

techwritescode force-pushed emulated-tls from 4741a54ef9 to 5961c2562c 2026-10-11 15:46:22 +00:00 Compare

techwritescode merged commit 5961c2562c into main 2026-10-11 15:53:44 +00:00

techwritescode deleted branch emulated-tls 2026-10-11 15:53:44 +00:00

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