--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/third_party/luajit/src/lj_state.h	Fri Jan 23 22:38:59 2026 -0800
@@ -0,0 +1,37 @@
+/*
+** State and stack handling.
+** Copyright (C) 2005-2023 Mike Pall. See Copyright Notice in luajit.h
+*/
+
+#ifndef _LJ_STATE_H
+#define _LJ_STATE_H
+
+#include "lj_obj.h"
+
+#define incr_top(L) \
+  (++L->top >= tvref(L->maxstack) && (lj_state_growstack1(L), 0))
+
+#define savestack(L, p)		((char *)(p) - mref(L->stack, char))
+#define restorestack(L, n)	((TValue *)(mref(L->stack, char) + (n)))
+
+LJ_FUNC void lj_state_relimitstack(lua_State *L);
+LJ_FUNC void lj_state_shrinkstack(lua_State *L, MSize used);
+LJ_FUNCA void LJ_FASTCALL lj_state_growstack(lua_State *L, MSize need);
+LJ_FUNC void LJ_FASTCALL lj_state_growstack1(lua_State *L);
+
+static LJ_AINLINE void lj_state_checkstack(lua_State *L, MSize need)
+{
+  if ((mref(L->maxstack, char) - (char *)L->top) <=
+      (ptrdiff_t)need*(ptrdiff_t)sizeof(TValue))
+    lj_state_growstack(L, need);
+}
+
+LJ_FUNC lua_State *lj_state_new(lua_State *L);
+LJ_FUNC void LJ_FASTCALL lj_state_free(global_State *g, lua_State *L);
+#if LJ_64 && !LJ_GC64 && !(defined(LUAJIT_USE_VALGRIND) && defined(LUAJIT_USE_SYSMALLOC))
+LJ_FUNC lua_State *lj_state_newstate(lua_Alloc f, void *ud);
+#endif
+
+#define LJ_ALLOCF_INTERNAL	((lua_Alloc)(void *)(uintptr_t)(1237<<4))
+
+#endif