X-Git-Url: https://git.saurik.com/apple/dyld.git/blobdiff_plain/d3f1e533acc7f70659b8bde9b6c040974f05e03b..bc3b7c8cda49ed8598284a489c0bb9694c67c6a4:/testing/kernel-cache-tests/last-data-const/test.py

diff --git a/testing/kernel-cache-tests/last-data-const/test.py b/testing/kernel-cache-tests/last-data-const/test.py
new file mode 100644
index 0000000..9e54ad0
--- /dev/null
+++ b/testing/kernel-cache-tests/last-data-const/test.py
@@ -0,0 +1,49 @@
+#!/usr/bin/python2.7
+
+import os
+import KernelCollection
+
+# Last data const should be folded in under data const and allowed to have fixups
+
+def check(kernel_cache):
+    kernel_cache.buildKernelCollection("arm64", "/last-data-const/main.kc", "/last-data-const/main.kernel", "/last-data-const/extensions", ["com.apple.foo", "com.apple.bar"], [])
+    kernel_cache.analyze("/last-data-const/main.kc", ["-layout", "-arch", "arm64"])
+
+    assert kernel_cache.dictionary()["cache-segments"][3]["name"] == "__DATA_CONST"
+    assert kernel_cache.dictionary()["cache-segments"][3]["vmAddr"] == "0x18000"
+    assert kernel_cache.dictionary()["cache-segments"][3]["vmSize"] == "0x8000"
+
+    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"][3]["name"] == "__LASTDATA_CONST"
+    assert kernel_cache.dictionary()["dylibs"][0]["segments"][3]["vmAddr"] == "0x18000"
+    # bar.kext
+    assert kernel_cache.dictionary()["dylibs"][1]["name"] == "com.apple.bar"
+    # foo.kext
+    assert kernel_cache.dictionary()["dylibs"][2]["name"] == "com.apple.foo"
+
+    # Check we have the correct addresses of the symbols being bound to
+    kernel_cache.analyze("/last-data-const/main.kc", ["-symbols", "-arch", "arm64"])
+    # main.kernel
+    # int g = &x;
+    assert kernel_cache.dictionary()["dylibs"][0]["global-symbols"][3]["name"] == "_x"
+    assert kernel_cache.dictionary()["dylibs"][0]["global-symbols"][3]["vmAddr"] == "0x24000"
+    # foo.kext
+    # foo()
+    assert kernel_cache.dictionary()["dylibs"][2]["global-symbols"][0]["name"] == "_foo"
+    assert kernel_cache.dictionary()["dylibs"][2]["global-symbols"][0]["vmAddr"] == "0x14030"
+
+    kernel_cache.analyze("/last-data-const/main.kc", ["-fixups", "-arch", "arm64"])
+    # main.kernel
+    # int g = &x;
+    assert kernel_cache.dictionary()["fixups"]["0x18000"] == "kc(0) + 0x24000"
+    # foo.kext
+    # foo()
+    assert kernel_cache.dictionary()["fixups"]["0x1C000"] == "kc(0) + 0x14030"
+
+# [~]> 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 -Wl,-rename_section,__DATA,__data,__LASTDATA_CONST,__data -Wl,-segprot,__LASTDATA_CONST,r--,r-- 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
+