--- /dev/null
+++ dyld/dyld-957/testing/kernel-cache-tests/packed-kext-text/test.py
@@ -0,0 +1,39 @@
+#!/usr/bin/python2.7
+
+import os
+import KernelCollection
+
+# __DATA should be packed at sub-page alignment
+# But only in the kexts.  The kernel pages should not be packed
+
+def check(kernel_cache):
+    kernel_cache.buildKernelCollection("arm64", "/packed-kext-text/main.kc", "/packed-kext-text/main.kernel", "/packed-kext-text/extensions", ["com.apple.foo", "com.apple.bar"], [])
+    kernel_cache.analyze("/packed-kext-text/main.kc", ["-layout", "-arch", "arm64"])
+
+    assert kernel_cache.dictionary()["cache-segments"][2]["name"] == "__TEXT_EXEC"
+    assert kernel_cache.dictionary()["cache-segments"][2]["vmAddr"] == "0x8000"
+    assert kernel_cache.dictionary()["cache-segments"][2]["vmSize"] == "0xC000"
+
+    assert len(kernel_cache.dictionary()["dylibs"]) == 3
+    # main.kernel
+    assert kernel_cache.dictionary()["dylibs"][0]["name"] == "com.apple.kernel"
+    assert kernel_cache.dictionary()["dylibs"][0]["segments"][1]["name"] == "__TEXT_EXEC"
+    assert kernel_cache.dictionary()["dylibs"][0]["segments"][1]["vmAddr"] == "0xC000"
+    assert kernel_cache.dictionary()["dylibs"][0]["segments"][1]["vmSize"] == "0x4000"
+    # bar.kext
+    assert kernel_cache.dictionary()["dylibs"][1]["name"] == "com.apple.bar"
+    assert kernel_cache.dictionary()["dylibs"][1]["segments"][1]["name"] == "__TEXT_EXEC"
+    assert kernel_cache.dictionary()["dylibs"][1]["segments"][1]["vmAddr"] == "0x10000"
+    assert kernel_cache.dictionary()["dylibs"][1]["segments"][1]["vmSize"] == "0x20"
+    # foo.kext
+    assert kernel_cache.dictionary()["dylibs"][2]["name"] == "com.apple.foo"
+    assert kernel_cache.dictionary()["dylibs"][2]["segments"][1]["name"] == "__TEXT_EXEC"
+    assert kernel_cache.dictionary()["dylibs"][2]["segments"][1]["vmAddr"] == "0x10020"
+    assert kernel_cache.dictionary()["dylibs"][2]["segments"][1]["vmSize"] == "0xC"
+
+
+# [~]> xcrun -sdk iphoneos.internal cc -arch arm64 -Wl,-static -mkernel -nostdlib -Wl,-add_split_seg_info -Wl,-rename_section,__TEXT,__text,__TEXT_EXEC,__text -Wl,-e,__start -Wl,-pagezero_size,0x0 -Wl,-pie main.c -o main.kernel
+# [~]> xcrun -sdk iphoneos.internal cc -arch arm64 -Wl,-kext -mkernel -nostdlib -Wl,-add_split_seg_info foo.c -o extensions/foo.kext/foo
+# [~]> xcrun -sdk iphoneos.internal cc -arch arm64 -Wl,-kext -mkernel -nostdlib -Wl,-add_split_seg_info bar.c -o extensions/bar.kext/bar
+# [~]> rm -r extensions/*.kext/*.ld
+