diff --git a/src/java.base/macosx/classes/jdk/internal/ffi/generated/errno/errno_h$shared.java b/src/java.base/macosx/classes/jdk/internal/ffi/generated/errno/errno_h$shared.java
new file mode 100644
index 0000000000000..dbb8f91ad920a
--- /dev/null
+++ b/src/java.base/macosx/classes/jdk/internal/ffi/generated/errno/errno_h$shared.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+// Generated by jextract
+
+package jdk.internal.ffi.generated.errno;
+
+import java.lang.foreign.*;
+import java.lang.invoke.*;
+import java.util.*;
+import java.util.stream.*;
+
+import static java.lang.foreign.ValueLayout.*;
+
+@SuppressWarnings("restricted")
+public class errno_h$shared {
+
+    errno_h$shared() {
+        // Should not be called directly
+    }
+
+    public static final OfBoolean C_BOOL = (OfBoolean) Linker.nativeLinker().canonicalLayouts().get("bool");
+    public static final OfByte C_CHAR =(OfByte)Linker.nativeLinker().canonicalLayouts().get("char");
+    public static final OfShort C_SHORT = (OfShort) Linker.nativeLinker().canonicalLayouts().get("short");
+    public static final OfInt C_INT = (OfInt) Linker.nativeLinker().canonicalLayouts().get("int");
+    public static final OfLong C_LONG_LONG = (OfLong) Linker.nativeLinker().canonicalLayouts().get("long long");
+    public static final OfFloat C_FLOAT = (OfFloat) Linker.nativeLinker().canonicalLayouts().get("float");
+    public static final OfDouble C_DOUBLE = (OfDouble) Linker.nativeLinker().canonicalLayouts().get("double");
+    public static final AddressLayout C_POINTER = ((AddressLayout) Linker.nativeLinker().canonicalLayouts().get("void*"))
+            .withTargetLayout(MemoryLayout.sequenceLayout(Long.MAX_VALUE, C_CHAR));
+    public static final OfLong C_LONG = (OfLong) Linker.nativeLinker().canonicalLayouts().get("long");
+
+    static final boolean TRACE_DOWNCALLS = Boolean.getBoolean("jextract.trace.downcalls");
+
+    static void traceDowncall(String name, Object... args) {
+         String traceArgs = Arrays.stream(args)
+                       .map(Object::toString)
+                       .collect(Collectors.joining(", "));
+         System.out.printf("%s(%s)\n", name, traceArgs);
+    }
+
+    static MethodHandle upcallHandle(Class<?> fi, String name, FunctionDescriptor fdesc) {
+        try {
+            return MethodHandles.lookup().findVirtual(fi, name, fdesc.toMethodType());
+        } catch (ReflectiveOperationException ex) {
+            throw new AssertionError(ex);
+        }
+    }
+
+    static MemoryLayout align(MemoryLayout layout, long align) {
+        return switch (layout) {
+            case PaddingLayout p -> p;
+            case ValueLayout v -> v.withByteAlignment(align);
+            case GroupLayout g -> {
+                MemoryLayout[] alignedMembers = g.memberLayouts().stream()
+                        .map(m -> align(m, align)).toArray(MemoryLayout[]::new);
+                yield g instanceof StructLayout ?
+                        MemoryLayout.structLayout(alignedMembers) : MemoryLayout.unionLayout(alignedMembers);
+            }
+            case SequenceLayout s -> MemoryLayout.sequenceLayout(s.elementCount(), align(s.elementLayout(), align));
+        };
+    }
+}
diff --git a/src/java.base/macosx/classes/jdk/internal/ffi/generated/errno/errno_h.java b/src/java.base/macosx/classes/jdk/internal/ffi/generated/errno/errno_h.java
new file mode 100644
index 0000000000000..7fdc152e91338
--- /dev/null
+++ b/src/java.base/macosx/classes/jdk/internal/ffi/generated/errno/errno_h.java
@@ -0,0 +1,116 @@
+/*
+ * Copyright (c) 2024, 2025, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+// Generated by jextract
+
+package jdk.internal.ffi.generated.errno;
+
+import java.lang.foreign.*;
+import java.lang.invoke.*;
+
+@SuppressWarnings("restricted")
+public class errno_h extends errno_h$shared {
+
+    errno_h() {
+        // Should not be called directly
+    }
+
+    static final Arena LIBRARY_ARENA = Arena.ofAuto();
+
+    static final SymbolLookup SYMBOL_LOOKUP = SymbolLookup.loaderLookup()
+            .or(Linker.nativeLinker().defaultLookup());
+
+    private static final int EINTR = (int)4L;
+    /**
+     * {@snippet lang=c :
+     * #define EINTR 4
+     * }
+     */
+    public static int EINTR() {
+        return EINTR;
+    }
+
+    private static class strerror_r {
+        public static final FunctionDescriptor DESC = FunctionDescriptor.of(
+                C_INT,
+                C_INT,
+                C_POINTER,
+                C_LONG
+        );
+
+        public static final MemorySegment ADDR = SYMBOL_LOOKUP.findOrThrow("strerror_r");
+
+        public static final MethodHandle HANDLE = Linker.nativeLinker().downcallHandle(ADDR, DESC);
+    }
+
+    /**
+     * Function descriptor for:
+     * {@snippet lang=c :
+     * int strerror_r(int __errnum, char *__strerrbuf, size_t __buflen)
+     * }
+     */
+    public static FunctionDescriptor strerror_r$descriptor() {
+        return strerror_r.DESC;
+    }
+
+    /**
+     * Downcall method handle for:
+     * {@snippet lang=c :
+     * int strerror_r(int __errnum, char *__strerrbuf, size_t __buflen)
+     * }
+     */
+    public static MethodHandle strerror_r$handle() {
+        return strerror_r.HANDLE;
+    }
+
+    /**
+     * Address for:
+     * {@snippet lang=c :
+     * int strerror_r(int __errnum, char *__strerrbuf, size_t __buflen)
+     * }
+     */
+    public static MemorySegment strerror_r$address() {
+        return strerror_r.ADDR;
+    }
+
+    /**
+     * {@snippet lang=c :
+     * int strerror_r(int __errnum, char *__strerrbuf, size_t __buflen)
+     * }
+     */
+    public static int strerror_r(int __errnum, MemorySegment __strerrbuf, long __buflen) {
+        var mh$ = strerror_r.HANDLE;
+        try {
+            if (TRACE_DOWNCALLS) {
+                traceDowncall("strerror_r", __errnum, __strerrbuf, __buflen);
+            }
+            return (int)mh$.invokeExact(__errnum, __strerrbuf, __buflen);
+        } catch (Error | RuntimeException ex) {
+           throw ex;
+        } catch (Throwable ex$) {
+           throw new AssertionError("should not reach here", ex$);
+        }
+    }
+}
diff --git a/src/java.base/macosx/classes/jdk/internal/ffi/generated/errno/package-info.java b/src/java.base/macosx/classes/jdk/internal/ffi/generated/errno/package-info.java
new file mode 100644
index 0000000000000..2a29f198b2a78
--- /dev/null
+++ b/src/java.base/macosx/classes/jdk/internal/ffi/generated/errno/package-info.java
@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2024, 2025, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * Defines native structures for errno APIs.
+ * Generated with the following jextract command:
+ * {@snippet lang = "Shell Script":
+ *
+ * HEADER_NAME=errno.h
+ * echo "#include <errno.h>" > $HEADER_NAME
+ * echo "#include <string.h>" >> $HEADER_NAME
+ *
+ * jextract --target-package jdk.internal.ffi.generated.errno \
+ *    --include-constant EINTR \
+ *    --include-function strerror_r \
+ *    $HEADER_NAME
+ * }
+ *
+ */
+
+package jdk.internal.ffi.generated.errno;
diff --git a/src/java.base/macosx/classes/jdk/internal/ffi/generated/kqueue/kevent.java b/src/java.base/macosx/classes/jdk/internal/ffi/generated/kqueue/kevent.java
new file mode 100644
index 0000000000000..22bbf57bcfa8e
--- /dev/null
+++ b/src/java.base/macosx/classes/jdk/internal/ffi/generated/kqueue/kevent.java
@@ -0,0 +1,378 @@
+/*
+ * Copyright (c) 2024, 2025, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+// Generated by jextract
+
+package jdk.internal.ffi.generated.kqueue;
+
+import java.lang.foreign.*;
+import java.util.function.*;
+
+import static java.lang.foreign.MemoryLayout.PathElement.*;
+import static java.lang.foreign.ValueLayout.*;
+
+/**
+ * {@snippet lang=c :
+ * struct kevent {
+ *     uintptr_t ident;
+ *     int16_t filter;
+ *     uint16_t flags;
+ *     uint32_t fflags;
+ *     intptr_t data;
+ *     void *udata;
+ * }
+ * }
+ */
+@SuppressWarnings("restricted")
+public class kevent {
+
+    kevent() {
+        // Should not be called directly
+    }
+
+    private static final GroupLayout $LAYOUT = MemoryLayout.structLayout(
+        kqueue_h.align(kqueue_h.C_LONG, 4).withName("ident"),
+        kqueue_h.C_SHORT.withName("filter"),
+        kqueue_h.C_SHORT.withName("flags"),
+        kqueue_h.C_INT.withName("fflags"),
+        kqueue_h.align(kqueue_h.C_LONG, 4).withName("data"),
+        kqueue_h.align(kqueue_h.C_POINTER, 4).withName("udata")
+    ).withName("kevent");
+
+    /**
+     * The layout of this struct
+     */
+    public static final GroupLayout layout() {
+        return $LAYOUT;
+    }
+
+    private static final OfLong ident$LAYOUT = (OfLong)$LAYOUT.select(groupElement("ident"));
+
+    /**
+     * Layout for field:
+     * {@snippet lang=c :
+     * uintptr_t ident
+     * }
+     */
+    public static final OfLong ident$layout() {
+        return ident$LAYOUT;
+    }
+
+    private static final long ident$OFFSET = $LAYOUT.byteOffset(groupElement("ident"));
+
+    /**
+     * Offset for field:
+     * {@snippet lang=c :
+     * uintptr_t ident
+     * }
+     */
+    public static final long ident$offset() {
+        return ident$OFFSET;
+    }
+
+    /**
+     * Getter for field:
+     * {@snippet lang=c :
+     * uintptr_t ident
+     * }
+     */
+    public static long ident(MemorySegment struct) {
+        return struct.get(ident$LAYOUT, ident$OFFSET);
+    }
+
+    /**
+     * Setter for field:
+     * {@snippet lang=c :
+     * uintptr_t ident
+     * }
+     */
+    public static void ident(MemorySegment struct, long fieldValue) {
+        struct.set(ident$LAYOUT, ident$OFFSET, fieldValue);
+    }
+
+    private static final OfShort filter$LAYOUT = (OfShort)$LAYOUT.select(groupElement("filter"));
+
+    /**
+     * Layout for field:
+     * {@snippet lang=c :
+     * int16_t filter
+     * }
+     */
+    public static final OfShort filter$layout() {
+        return filter$LAYOUT;
+    }
+
+    private static final long filter$OFFSET = $LAYOUT.byteOffset(groupElement("filter"));
+
+    /**
+     * Offset for field:
+     * {@snippet lang=c :
+     * int16_t filter
+     * }
+     */
+    public static final long filter$offset() {
+        return filter$OFFSET;
+    }
+
+    /**
+     * Getter for field:
+     * {@snippet lang=c :
+     * int16_t filter
+     * }
+     */
+    public static short filter(MemorySegment struct) {
+        return struct.get(filter$LAYOUT, filter$OFFSET);
+    }
+
+    /**
+     * Setter for field:
+     * {@snippet lang=c :
+     * int16_t filter
+     * }
+     */
+    public static void filter(MemorySegment struct, short fieldValue) {
+        struct.set(filter$LAYOUT, filter$OFFSET, fieldValue);
+    }
+
+    private static final OfShort flags$LAYOUT = (OfShort)$LAYOUT.select(groupElement("flags"));
+
+    /**
+     * Layout for field:
+     * {@snippet lang=c :
+     * uint16_t flags
+     * }
+     */
+    public static final OfShort flags$layout() {
+        return flags$LAYOUT;
+    }
+
+    private static final long flags$OFFSET = $LAYOUT.byteOffset(groupElement("flags"));
+
+    /**
+     * Offset for field:
+     * {@snippet lang=c :
+     * uint16_t flags
+     * }
+     */
+    public static final long flags$offset() {
+        return flags$OFFSET;
+    }
+
+    /**
+     * Getter for field:
+     * {@snippet lang=c :
+     * uint16_t flags
+     * }
+     */
+    public static short flags(MemorySegment struct) {
+        return struct.get(flags$LAYOUT, flags$OFFSET);
+    }
+
+    /**
+     * Setter for field:
+     * {@snippet lang=c :
+     * uint16_t flags
+     * }
+     */
+    public static void flags(MemorySegment struct, short fieldValue) {
+        struct.set(flags$LAYOUT, flags$OFFSET, fieldValue);
+    }
+
+    private static final OfInt fflags$LAYOUT = (OfInt)$LAYOUT.select(groupElement("fflags"));
+
+    /**
+     * Layout for field:
+     * {@snippet lang=c :
+     * uint32_t fflags
+     * }
+     */
+    public static final OfInt fflags$layout() {
+        return fflags$LAYOUT;
+    }
+
+    private static final long fflags$OFFSET = $LAYOUT.byteOffset(groupElement("fflags"));
+
+    /**
+     * Offset for field:
+     * {@snippet lang=c :
+     * uint32_t fflags
+     * }
+     */
+    public static final long fflags$offset() {
+        return fflags$OFFSET;
+    }
+
+    /**
+     * Getter for field:
+     * {@snippet lang=c :
+     * uint32_t fflags
+     * }
+     */
+    public static int fflags(MemorySegment struct) {
+        return struct.get(fflags$LAYOUT, fflags$OFFSET);
+    }
+
+    /**
+     * Setter for field:
+     * {@snippet lang=c :
+     * uint32_t fflags
+     * }
+     */
+    public static void fflags(MemorySegment struct, int fieldValue) {
+        struct.set(fflags$LAYOUT, fflags$OFFSET, fieldValue);
+    }
+
+    private static final OfLong data$LAYOUT = (OfLong)$LAYOUT.select(groupElement("data"));
+
+    /**
+     * Layout for field:
+     * {@snippet lang=c :
+     * intptr_t data
+     * }
+     */
+    public static final OfLong data$layout() {
+        return data$LAYOUT;
+    }
+
+    private static final long data$OFFSET = $LAYOUT.byteOffset(groupElement("data"));
+
+    /**
+     * Offset for field:
+     * {@snippet lang=c :
+     * intptr_t data
+     * }
+     */
+    public static final long data$offset() {
+        return data$OFFSET;
+    }
+
+    /**
+     * Getter for field:
+     * {@snippet lang=c :
+     * intptr_t data
+     * }
+     */
+    public static long data(MemorySegment struct) {
+        return struct.get(data$LAYOUT, data$OFFSET);
+    }
+
+    /**
+     * Setter for field:
+     * {@snippet lang=c :
+     * intptr_t data
+     * }
+     */
+    public static void data(MemorySegment struct, long fieldValue) {
+        struct.set(data$LAYOUT, data$OFFSET, fieldValue);
+    }
+
+    private static final AddressLayout udata$LAYOUT = (AddressLayout)$LAYOUT.select(groupElement("udata"));
+
+    /**
+     * Layout for field:
+     * {@snippet lang=c :
+     * void *udata
+     * }
+     */
+    public static final AddressLayout udata$layout() {
+        return udata$LAYOUT;
+    }
+
+    private static final long udata$OFFSET = $LAYOUT.byteOffset(groupElement("udata"));
+
+    /**
+     * Offset for field:
+     * {@snippet lang=c :
+     * void *udata
+     * }
+     */
+    public static final long udata$offset() {
+        return udata$OFFSET;
+    }
+
+    /**
+     * Getter for field:
+     * {@snippet lang=c :
+     * void *udata
+     * }
+     */
+    public static MemorySegment udata(MemorySegment struct) {
+        return struct.get(udata$LAYOUT, udata$OFFSET);
+    }
+
+    /**
+     * Setter for field:
+     * {@snippet lang=c :
+     * void *udata
+     * }
+     */
+    public static void udata(MemorySegment struct, MemorySegment fieldValue) {
+        struct.set(udata$LAYOUT, udata$OFFSET, fieldValue);
+    }
+
+    /**
+     * Obtains a slice of {@code arrayParam} which selects the array element at {@code index}.
+     * The returned segment has address {@code arrayParam.address() + index * layout().byteSize()}
+     */
+    public static MemorySegment asSlice(MemorySegment array, long index) {
+        return array.asSlice(layout().byteSize() * index);
+    }
+
+    /**
+     * The size (in bytes) of this struct
+     */
+    public static long sizeof() { return layout().byteSize(); }
+
+    /**
+     * Allocate a segment of size {@code layout().byteSize()} using {@code allocator}
+     */
+    public static MemorySegment allocate(SegmentAllocator allocator) {
+        return allocator.allocate(layout());
+    }
+
+    /**
+     * Allocate an array of size {@code elementCount} using {@code allocator}.
+     * The returned segment has size {@code elementCount * layout().byteSize()}.
+     */
+    public static MemorySegment allocateArray(long elementCount, SegmentAllocator allocator) {
+        return allocator.allocate(MemoryLayout.sequenceLayout(elementCount, layout()));
+    }
+
+    /**
+     * Reinterprets {@code addr} using target {@code arena} and {@code cleanupAction} (if any).
+     * The returned segment has size {@code layout().byteSize()}
+     */
+    public static MemorySegment reinterpret(MemorySegment addr, Arena arena, Consumer<MemorySegment> cleanup) {
+        return reinterpret(addr, 1, arena, cleanup);
+    }
+
+    /**
+     * Reinterprets {@code addr} using target {@code arena} and {@code cleanupAction} (if any).
+     * The returned segment has size {@code elementCount * layout().byteSize()}
+     */
+    public static MemorySegment reinterpret(MemorySegment addr, long elementCount, Arena arena, Consumer<MemorySegment> cleanup) {
+        return addr.reinterpret(layout().byteSize() * elementCount, arena, cleanup);
+    }
+}
diff --git a/src/java.base/macosx/classes/jdk/internal/ffi/generated/kqueue/kqueue_h$shared.java b/src/java.base/macosx/classes/jdk/internal/ffi/generated/kqueue/kqueue_h$shared.java
new file mode 100644
index 0000000000000..662916d4e8d99
--- /dev/null
+++ b/src/java.base/macosx/classes/jdk/internal/ffi/generated/kqueue/kqueue_h$shared.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2024, 2025, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+// Generated by jextract
+
+package jdk.internal.ffi.generated.kqueue;
+
+import java.lang.foreign.*;
+import java.lang.invoke.*;
+import java.util.*;
+import java.util.stream.*;
+
+import static java.lang.foreign.ValueLayout.*;
+
+@SuppressWarnings("restricted")
+public class kqueue_h$shared {
+
+    kqueue_h$shared() {
+        // Should not be called directly
+    }
+
+    public static final OfBoolean C_BOOL = (OfBoolean) Linker.nativeLinker().canonicalLayouts().get("bool");
+    public static final OfByte C_CHAR =(OfByte)Linker.nativeLinker().canonicalLayouts().get("char");
+    public static final OfShort C_SHORT = (OfShort) Linker.nativeLinker().canonicalLayouts().get("short");
+    public static final OfInt C_INT = (OfInt) Linker.nativeLinker().canonicalLayouts().get("int");
+    public static final OfLong C_LONG_LONG = (OfLong) Linker.nativeLinker().canonicalLayouts().get("long long");
+    public static final OfFloat C_FLOAT = (OfFloat) Linker.nativeLinker().canonicalLayouts().get("float");
+    public static final OfDouble C_DOUBLE = (OfDouble) Linker.nativeLinker().canonicalLayouts().get("double");
+    public static final AddressLayout C_POINTER = ((AddressLayout) Linker.nativeLinker().canonicalLayouts().get("void*"))
+            .withTargetLayout(MemoryLayout.sequenceLayout(Long.MAX_VALUE, C_CHAR));
+    public static final OfLong C_LONG = (OfLong) Linker.nativeLinker().canonicalLayouts().get("long");
+
+    static final boolean TRACE_DOWNCALLS = Boolean.getBoolean("jextract.trace.downcalls");
+
+    static void traceDowncall(String name, Object... args) {
+         String traceArgs = Arrays.stream(args)
+                       .map(Object::toString)
+                       .collect(Collectors.joining(", "));
+         System.out.printf("%s(%s)\n", name, traceArgs);
+    }
+
+    static MethodHandle upcallHandle(Class<?> fi, String name, FunctionDescriptor fdesc) {
+        try {
+            return MethodHandles.lookup().findVirtual(fi, name, fdesc.toMethodType());
+        } catch (ReflectiveOperationException ex) {
+            throw new AssertionError(ex);
+        }
+    }
+
+    static MemoryLayout align(MemoryLayout layout, long align) {
+        return switch (layout) {
+            case PaddingLayout p -> p;
+            case ValueLayout v -> v.withByteAlignment(align);
+            case GroupLayout g -> {
+                MemoryLayout[] alignedMembers = g.memberLayouts().stream()
+                        .map(m -> align(m, align)).toArray(MemoryLayout[]::new);
+                yield g instanceof StructLayout ?
+                        MemoryLayout.structLayout(alignedMembers) : MemoryLayout.unionLayout(alignedMembers);
+            }
+            case SequenceLayout s -> MemoryLayout.sequenceLayout(s.elementCount(), align(s.elementLayout(), align));
+        };
+    }
+}
diff --git a/src/java.base/macosx/classes/jdk/internal/ffi/generated/kqueue/kqueue_h.java b/src/java.base/macosx/classes/jdk/internal/ffi/generated/kqueue/kqueue_h.java
new file mode 100644
index 0000000000000..2ba04f53ea86d
--- /dev/null
+++ b/src/java.base/macosx/classes/jdk/internal/ffi/generated/kqueue/kqueue_h.java
@@ -0,0 +1,222 @@
+/*
+ * Copyright (c) 2024, 2025, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+// Generated by jextract
+
+package jdk.internal.ffi.generated.kqueue;
+
+import java.lang.foreign.*;
+import java.lang.invoke.*;
+
+@SuppressWarnings("restricted")
+public class kqueue_h extends kqueue_h$shared {
+
+    kqueue_h() {
+        // Should not be called directly
+    }
+
+    static final Arena LIBRARY_ARENA = Arena.ofAuto();
+
+    static final SymbolLookup SYMBOL_LOOKUP = SymbolLookup.loaderLookup()
+            .or(Linker.nativeLinker().defaultLookup());
+
+    private static final int EV_ADD = (int)1L;
+    /**
+     * {@snippet lang=c :
+     * #define EV_ADD 1
+     * }
+     */
+    public static int EV_ADD() {
+        return EV_ADD;
+    }
+    private static final int EV_DELETE = (int)2L;
+    /**
+     * {@snippet lang=c :
+     * #define EV_DELETE 2
+     * }
+     */
+    public static int EV_DELETE() {
+        return EV_DELETE;
+    }
+    private static final int EV_ONESHOT = (int)16L;
+    /**
+     * {@snippet lang=c :
+     * #define EV_ONESHOT 16
+     * }
+     */
+    public static int EV_ONESHOT() {
+        return EV_ONESHOT;
+    }
+    private static final int EV_CLEAR = (int)32L;
+    /**
+     * {@snippet lang=c :
+     * #define EV_CLEAR 32
+     * }
+     */
+    public static int EV_CLEAR() {
+        return EV_CLEAR;
+    }
+
+    private static class kqueue {
+        public static final FunctionDescriptor DESC = FunctionDescriptor.of(
+            kqueue_h.C_INT    );
+
+        public static final MemorySegment ADDR = SYMBOL_LOOKUP.findOrThrow("kqueue");
+
+        public static final MethodHandle HANDLE = Linker.nativeLinker().downcallHandle(ADDR, DESC);
+    }
+
+    /**
+     * Function descriptor for:
+     * {@snippet lang=c :
+     * int kqueue()
+     * }
+     */
+    public static FunctionDescriptor kqueue$descriptor() {
+        return kqueue.DESC;
+    }
+
+    /**
+     * Downcall method handle for:
+     * {@snippet lang=c :
+     * int kqueue()
+     * }
+     */
+    public static MethodHandle kqueue$handle() {
+        return kqueue.HANDLE;
+    }
+
+    /**
+     * Address for:
+     * {@snippet lang=c :
+     * int kqueue()
+     * }
+     */
+    public static MemorySegment kqueue$address() {
+        return kqueue.ADDR;
+    }
+
+    /**
+     * {@snippet lang=c :
+     * int kqueue()
+     * }
+     */
+    public static int kqueue() {
+        var mh$ = kqueue.HANDLE;
+        try {
+            if (TRACE_DOWNCALLS) {
+                traceDowncall("kqueue");
+            }
+            return (int)mh$.invokeExact();
+        } catch (Error | RuntimeException ex) {
+           throw ex;
+        } catch (Throwable ex$) {
+           throw new AssertionError("should not reach here", ex$);
+        }
+    }
+
+    private static class kevent {
+        public static final FunctionDescriptor DESC = FunctionDescriptor.of(
+            kqueue_h.C_INT,
+            kqueue_h.C_INT,
+            kqueue_h.C_POINTER,
+            kqueue_h.C_INT,
+            kqueue_h.C_POINTER,
+            kqueue_h.C_INT,
+            kqueue_h.C_POINTER
+        );
+
+        public static final MemorySegment ADDR = SYMBOL_LOOKUP.findOrThrow("kevent");
+
+        public static final MethodHandle HANDLE = Linker.nativeLinker().downcallHandle(ADDR, DESC);
+    }
+
+    /**
+     * Function descriptor for:
+     * {@snippet lang=c :
+     * int kevent(int kq, const struct kevent *changelist, int nchanges, struct kevent *eventlist, int nevents, const struct timespec *timeout)
+     * }
+     */
+    public static FunctionDescriptor kevent$descriptor() {
+        return kevent.DESC;
+    }
+
+    /**
+     * Downcall method handle for:
+     * {@snippet lang=c :
+     * int kevent(int kq, const struct kevent *changelist, int nchanges, struct kevent *eventlist, int nevents, const struct timespec *timeout)
+     * }
+     */
+    public static MethodHandle kevent$handle() {
+        return kevent.HANDLE;
+    }
+
+    /**
+     * Address for:
+     * {@snippet lang=c :
+     * int kevent(int kq, const struct kevent *changelist, int nchanges, struct kevent *eventlist, int nevents, const struct timespec *timeout)
+     * }
+     */
+    public static MemorySegment kevent$address() {
+        return kevent.ADDR;
+    }
+
+    /**
+     * {@snippet lang=c :
+     * int kevent(int kq, const struct kevent *changelist, int nchanges, struct kevent *eventlist, int nevents, const struct timespec *timeout)
+     * }
+     */
+    public static int kevent(int kq, MemorySegment changelist, int nchanges, MemorySegment eventlist, int nevents, MemorySegment timeout) {
+        var mh$ = kevent.HANDLE;
+        try {
+            if (TRACE_DOWNCALLS) {
+                traceDowncall("kevent", kq, changelist, nchanges, eventlist, nevents, timeout);
+            }
+            return (int)mh$.invokeExact(kq, changelist, nchanges, eventlist, nevents, timeout);
+        } catch (Error | RuntimeException ex) {
+           throw ex;
+        } catch (Throwable ex$) {
+           throw new AssertionError("should not reach here", ex$);
+        }
+    }
+    private static final int EVFILT_READ = (int)-1L;
+    /**
+     * {@snippet lang=c :
+     * #define EVFILT_READ -1
+     * }
+     */
+    public static int EVFILT_READ() {
+        return EVFILT_READ;
+    }
+    private static final int EVFILT_WRITE = (int)-2L;
+    /**
+     * {@snippet lang=c :
+     * #define EVFILT_WRITE -2
+     * }
+     */
+    public static int EVFILT_WRITE() {
+        return EVFILT_WRITE;
+    }
+}
diff --git a/src/java.base/macosx/classes/jdk/internal/ffi/generated/kqueue/package-info.java b/src/java.base/macosx/classes/jdk/internal/ffi/generated/kqueue/package-info.java
new file mode 100644
index 0000000000000..ce372c87b749e
--- /dev/null
+++ b/src/java.base/macosx/classes/jdk/internal/ffi/generated/kqueue/package-info.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2024, 2025, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * Defines native structures for Kqueue socket APIs.
+ * Generated with the following jextract command:
+ * {@snippet lang = "Shell Script":
+ *
+ *  HEADER_NAME=kqueue.h
+ *   echo "#include <sys/types.h> " > $HEADER_NAME
+ *   echo "#include <sys/event.h>" >> $HEADER_NAME
+ *
+ *
+ * jextract --target-package jdk.internal.ffi.generated.kqueue \
+ *    --include-constant EV_CLEAR \
+ *    --include-constant EV_ONESHOT \
+ *    --include-constant EV_DELETE \
+ *    --include-constant EV_ADD \
+ *    --include-constant EVFILT_WRITE \
+ *    --include-constant EVFILT_READ \
+ *    --include-function kevent \
+ *    --include-function kqueue \
+ *    --include-struct kevent \
+ *    $HEADER_NAME
+ * }
+ *
+ */
+
+package jdk.internal.ffi.generated.kqueue;
diff --git a/src/java.base/macosx/classes/jdk/internal/ffi/generated/timespec/package-info.java b/src/java.base/macosx/classes/jdk/internal/ffi/generated/timespec/package-info.java
new file mode 100644
index 0000000000000..850991e61fc51
--- /dev/null
+++ b/src/java.base/macosx/classes/jdk/internal/ffi/generated/timespec/package-info.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2024, 2025, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * Defines native structures for timespec APIs.
+ * Generated with the following jextract command:
+ * {@snippet lang = "Shell Script":
+ *
+ * HEADER_NAME=timespec.h
+ * echo "#include <time.h>" > $HEADER_NAME
+ *
+ * jextract --target-package jdk.internal.ffi.generated.timespec \
+ *    --include-struct timespec \
+ *    $HEADER_NAME
+ * }
+ *
+ */
+
+package jdk.internal.ffi.generated.timespec;
diff --git a/src/java.base/macosx/classes/jdk/internal/ffi/generated/timespec/timespec.java b/src/java.base/macosx/classes/jdk/internal/ffi/generated/timespec/timespec.java
new file mode 100644
index 0000000000000..bee0caf26fc5c
--- /dev/null
+++ b/src/java.base/macosx/classes/jdk/internal/ffi/generated/timespec/timespec.java
@@ -0,0 +1,194 @@
+/*
+ * Copyright (c) 2024, 2025, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+// Generated by jextract
+
+package jdk.internal.ffi.generated.timespec;
+
+import java.lang.foreign.*;
+import java.util.function.*;
+
+import static java.lang.foreign.MemoryLayout.PathElement.*;
+import static java.lang.foreign.ValueLayout.*;
+
+/**
+ * {@snippet lang=c :
+ * struct timespec {
+ *     __darwin_time_t tv_sec;
+ *     long tv_nsec;
+ * }
+ * }
+ */
+@SuppressWarnings("restricted")
+public class timespec {
+
+    timespec() {
+        // Should not be called directly
+    }
+
+    private static final GroupLayout $LAYOUT = MemoryLayout.structLayout(
+        timespec_h.C_LONG.withName("tv_sec"),
+        timespec_h.C_LONG.withName("tv_nsec")
+    ).withName("timespec");
+
+    /**
+     * The layout of this struct
+     */
+    public static final GroupLayout layout() {
+        return $LAYOUT;
+    }
+
+    private static final OfLong tv_sec$LAYOUT = (OfLong)$LAYOUT.select(groupElement("tv_sec"));
+
+    /**
+     * Layout for field:
+     * {@snippet lang=c :
+     * __darwin_time_t tv_sec
+     * }
+     */
+    public static final OfLong tv_sec$layout() {
+        return tv_sec$LAYOUT;
+    }
+
+    private static final long tv_sec$OFFSET = $LAYOUT.byteOffset(groupElement("tv_sec"));
+
+    /**
+     * Offset for field:
+     * {@snippet lang=c :
+     * __darwin_time_t tv_sec
+     * }
+     */
+    public static final long tv_sec$offset() {
+        return tv_sec$OFFSET;
+    }
+
+    /**
+     * Getter for field:
+     * {@snippet lang=c :
+     * __darwin_time_t tv_sec
+     * }
+     */
+    public static long tv_sec(MemorySegment struct) {
+        return struct.get(tv_sec$LAYOUT, tv_sec$OFFSET);
+    }
+
+    /**
+     * Setter for field:
+     * {@snippet lang=c :
+     * __darwin_time_t tv_sec
+     * }
+     */
+    public static void tv_sec(MemorySegment struct, long fieldValue) {
+        struct.set(tv_sec$LAYOUT, tv_sec$OFFSET, fieldValue);
+    }
+
+    private static final OfLong tv_nsec$LAYOUT = (OfLong)$LAYOUT.select(groupElement("tv_nsec"));
+
+    /**
+     * Layout for field:
+     * {@snippet lang=c :
+     * long tv_nsec
+     * }
+     */
+    public static final OfLong tv_nsec$layout() {
+        return tv_nsec$LAYOUT;
+    }
+
+    private static final long tv_nsec$OFFSET = $LAYOUT.byteOffset(groupElement("tv_nsec"));
+
+    /**
+     * Offset for field:
+     * {@snippet lang=c :
+     * long tv_nsec
+     * }
+     */
+    public static final long tv_nsec$offset() {
+        return tv_nsec$OFFSET;
+    }
+
+    /**
+     * Getter for field:
+     * {@snippet lang=c :
+     * long tv_nsec
+     * }
+     */
+    public static long tv_nsec(MemorySegment struct) {
+        return struct.get(tv_nsec$LAYOUT, tv_nsec$OFFSET);
+    }
+
+    /**
+     * Setter for field:
+     * {@snippet lang=c :
+     * long tv_nsec
+     * }
+     */
+    public static void tv_nsec(MemorySegment struct, long fieldValue) {
+        struct.set(tv_nsec$LAYOUT, tv_nsec$OFFSET, fieldValue);
+    }
+
+    /**
+     * Obtains a slice of {@code arrayParam} which selects the array element at {@code index}.
+     * The returned segment has address {@code arrayParam.address() + index * layout().byteSize()}
+     */
+    public static MemorySegment asSlice(MemorySegment array, long index) {
+        return array.asSlice(layout().byteSize() * index);
+    }
+
+    /**
+     * The size (in bytes) of this struct
+     */
+    public static long sizeof() { return layout().byteSize(); }
+
+    /**
+     * Allocate a segment of size {@code layout().byteSize()} using {@code allocator}
+     */
+    public static MemorySegment allocate(SegmentAllocator allocator) {
+        return allocator.allocate(layout());
+    }
+
+    /**
+     * Allocate an array of size {@code elementCount} using {@code allocator}.
+     * The returned segment has size {@code elementCount * layout().byteSize()}.
+     */
+    public static MemorySegment allocateArray(long elementCount, SegmentAllocator allocator) {
+        return allocator.allocate(MemoryLayout.sequenceLayout(elementCount, layout()));
+    }
+
+    /**
+     * Reinterprets {@code addr} using target {@code arena} and {@code cleanupAction} (if any).
+     * The returned segment has size {@code layout().byteSize()}
+     */
+    public static MemorySegment reinterpret(MemorySegment addr, Arena arena, Consumer<MemorySegment> cleanup) {
+        return reinterpret(addr, 1, arena, cleanup);
+    }
+
+    /**
+     * Reinterprets {@code addr} using target {@code arena} and {@code cleanupAction} (if any).
+     * The returned segment has size {@code elementCount * layout().byteSize()}
+     */
+    public static MemorySegment reinterpret(MemorySegment addr, long elementCount, Arena arena, Consumer<MemorySegment> cleanup) {
+        return addr.reinterpret(layout().byteSize() * elementCount, arena, cleanup);
+    }
+}
diff --git a/src/java.base/macosx/classes/jdk/internal/ffi/generated/timespec/timespec_h$shared.java b/src/java.base/macosx/classes/jdk/internal/ffi/generated/timespec/timespec_h$shared.java
new file mode 100644
index 0000000000000..6af5bb12e0c3a
--- /dev/null
+++ b/src/java.base/macosx/classes/jdk/internal/ffi/generated/timespec/timespec_h$shared.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2024, 2025, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+// Generated by jextract
+
+package jdk.internal.ffi.generated.timespec;
+
+import java.lang.foreign.*;
+import java.lang.invoke.*;
+import java.util.*;
+import java.util.stream.*;
+
+import static java.lang.foreign.ValueLayout.*;
+
+@SuppressWarnings("restricted")
+public class timespec_h$shared {
+
+    timespec_h$shared() {
+        // Should not be called directly
+    }
+
+    public static final OfBoolean C_BOOL = (OfBoolean) Linker.nativeLinker().canonicalLayouts().get("bool");
+    public static final OfByte C_CHAR =(OfByte)Linker.nativeLinker().canonicalLayouts().get("char");
+    public static final OfShort C_SHORT = (OfShort) Linker.nativeLinker().canonicalLayouts().get("short");
+    public static final OfInt C_INT = (OfInt) Linker.nativeLinker().canonicalLayouts().get("int");
+    public static final OfLong C_LONG_LONG = (OfLong) Linker.nativeLinker().canonicalLayouts().get("long long");
+    public static final OfFloat C_FLOAT = (OfFloat) Linker.nativeLinker().canonicalLayouts().get("float");
+    public static final OfDouble C_DOUBLE = (OfDouble) Linker.nativeLinker().canonicalLayouts().get("double");
+    public static final AddressLayout C_POINTER = ((AddressLayout) Linker.nativeLinker().canonicalLayouts().get("void*"))
+            .withTargetLayout(MemoryLayout.sequenceLayout(Long.MAX_VALUE, C_CHAR));
+    public static final OfLong C_LONG = (OfLong) Linker.nativeLinker().canonicalLayouts().get("long");
+
+    static final boolean TRACE_DOWNCALLS = Boolean.getBoolean("jextract.trace.downcalls");
+
+    static void traceDowncall(String name, Object... args) {
+         String traceArgs = Arrays.stream(args)
+                       .map(Object::toString)
+                       .collect(Collectors.joining(", "));
+         System.out.printf("%s(%s)\n", name, traceArgs);
+    }
+
+    static MethodHandle upcallHandle(Class<?> fi, String name, FunctionDescriptor fdesc) {
+        try {
+            return MethodHandles.lookup().findVirtual(fi, name, fdesc.toMethodType());
+        } catch (ReflectiveOperationException ex) {
+            throw new AssertionError(ex);
+        }
+    }
+
+    static MemoryLayout align(MemoryLayout layout, long align) {
+        return switch (layout) {
+            case PaddingLayout p -> p;
+            case ValueLayout v -> v.withByteAlignment(align);
+            case GroupLayout g -> {
+                MemoryLayout[] alignedMembers = g.memberLayouts().stream()
+                        .map(m -> align(m, align)).toArray(MemoryLayout[]::new);
+                yield g instanceof StructLayout ?
+                        MemoryLayout.structLayout(alignedMembers) : MemoryLayout.unionLayout(alignedMembers);
+            }
+            case SequenceLayout s -> MemoryLayout.sequenceLayout(s.elementCount(), align(s.elementLayout(), align));
+        };
+    }
+}
diff --git a/src/java.base/macosx/classes/jdk/internal/ffi/generated/timespec/timespec_h.java b/src/java.base/macosx/classes/jdk/internal/ffi/generated/timespec/timespec_h.java
new file mode 100644
index 0000000000000..e1470fcf43f67
--- /dev/null
+++ b/src/java.base/macosx/classes/jdk/internal/ffi/generated/timespec/timespec_h.java
@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2024, 2025, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+// Generated by jextract
+
+package jdk.internal.ffi.generated.timespec;
+
+import java.lang.foreign.*;
+
+public class timespec_h extends timespec_h$shared {
+
+    timespec_h() {
+        // Should not be called directly
+    }
+
+    static final Arena LIBRARY_ARENA = Arena.ofAuto();
+
+    static final SymbolLookup SYMBOL_LOOKUP = SymbolLookup.loaderLookup()
+            .or(Linker.nativeLinker().defaultLookup());
+
+}