[Tarantool-patches] [PATCH luajit 0/5] Various FFI ABI calling conventions fixes

[Evgeniy Temirgaleev]

Hi, Sergey!

Thanks for the patch set! It LGTM.

--
Best regards,
Evgeniy Temirgaleev

> 
> From: Sergey Kaplun <skaplun at tarantool.org>
> To: Sergey Bronnikov <sergeyb at tarantool.org>, Evgeniy Temirgaleev <e.temirgaleev at tarantool.org
> >
> Cc: tarantool-patches at dev.tarantool.org, Sergey Kaplun <skaplun at tarantool.org
> >
> Date: Saturday, May 30, 2026 7:04 PM +03:00
> This patch set provides the various improvements to the FFI interface.
> The first two patches add support for OSX calling conventions for
> varargs functions and fix the JIT-compiled code for varargs functions on
> macOS arm64. The next patch adds handling for HFA structures with an
> array in them. The fourth patch adds many fixups for x64/arm64 calling
> conventions. The last one patch is a follow-up to it to fix the macOS
> regression introduced in the fourth patch.
> 
> Branch: https://github.com/tarantool/luajit/tree/skaplun/ffi-c-call-conventions
> 
> 
> Related issues:
> * https://github.com/tarantool/tarantool/issues/12480
> * https://github.com/tarantool/tarantool/issues/6097
> * https://github.com/LuaJIT/LuaJIT/issues/205
> * https://github.com/LuaJIT/LuaJIT/issues/1357
> * https://github.com/LuaJIT/LuaJIT/issues/1455
> 
> Mike Pall (5):
> FFI: Unify stack setup for C calls in interpreter.
> FFI/ARM64/OSX: Handle non-standard OSX C calling conventions.
> ARM64: Fix pass-by-value struct calling conventions.
> FFI: Various ABI and calling convention fixes.
> FFI/MacOS: Fix calling convention for enums.
> 
> src/lj_asm_arm64.h | 75 +-
> src/lj_ccall.c | 133 ++--
> src/lj_ccall.h | 13 +-
> src/lj_cparse.c | 9 +-
> src/lj_crecord.c | 27 +
> src/lj_ctype.h | 2 +-
> src/vm_arm.dasc | 8 +-
> src/vm_arm64.dasc | 8 +-
> src/vm_mips.dasc | 1 -
> src/vm_mips64.dasc | 1 -
> src/vm_ppc.dasc | 3 +-
> src/vm_x64.dasc | 8 +-
> src/vm_x86.dasc | 22 +-
> .../ffi-call-empty-struct.test.lua | 47 ++
> test/tarantool-tests/ffi-ccall/CMakeLists.txt | 13 +-
> test/tarantool-tests/ffi-ccall/libfficcall.c | 650 ++++++++++++++++++
> .../ffi-vector-arguments.test.lua | 62 ++
> .../gh-6097-arm64-osx-ffi-vararg.test.lua | 43 ++
> ...57-arm64-struct-array-pass-by-val.test.lua | 23 +
> .../lj-1455-arm64-ffi-ccall-hfa.test.lua | 82 +++
> .../lj-1455-bitfield0-a16.test.lua | 27 +
> .../lj-1455-ffi-conventions.test.lua | 441 ++++++++++++
> .../lj-205-arm64-osx-ffi-enum-arg.test.lua | 63 ++
> .../lj-205-arm64-osx-ffi-small-arg.test.lua | 29 +
> 24 files changed, 1703 insertions(+), 87 deletions(-)
> create mode 100644 test/tarantool-tests/ffi-call-empty-struct.test.lua
> create mode 100644 test/tarantool-tests/ffi-vector-arguments.test.lua
> create mode 100644
> test/tarantool-tests/gh-6097-arm64-osx-ffi-vararg.test.lua
> create mode 100644
> test/tarantool-tests/lj-1357-arm64-struct-array-pass-by-val.test.lua
> create mode 100644
> test/tarantool-tests/lj-1455-arm64-ffi-ccall-hfa.test.lua
> create mode 100644 test/tarantool-tests/lj-1455-bitfield0-a16.test.lua
> create mode 100644 test/tarantool-tests/lj-1455-ffi-conventions.test.lua
> create mode 100644
> test/tarantool-tests/lj-205-arm64-osx-ffi-enum-arg.test.lua
> create mode 100644
> test/tarantool-tests/lj-205-arm64-osx-ffi-small-arg.test.lua
> 
> --
> 2.54.0
>
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