testing/kernel-cache-tests/kext-bind-to-kext-arm64-chains/test.py

   1 #!/usr/bin/python2.7
   2
   3 import os
   4 import KernelCollection
   5
   6 # This tests that kexts can bind to each other using DYLD_CHAINED_PTR_64_OFFSET
   7
   8 def check(kernel_cache):
   9     kernel_cache.buildKernelCollection("arm64", "/kext-bind-to-kext-arm64-chains/main.kc", "/kext-bind-to-kext-arm64-chains/main.kernel", "/kext-bind-to-kext-arm64-chains/extensions", ["com.apple.foo", "com.apple.bar"], [])
  10
  11     # layout
  12     kernel_cache.analyze("/kext-bind-to-kext-arm64-chains/main.kc", ["-layout", "-arch", "arm64"])
  13     assert len(kernel_cache.dictionary()["dylibs"]) == 3
  14     # main.kernel
  15     assert kernel_cache.dictionary()["dylibs"][0]["name"] == "com.apple.kernel"
  16     assert len(kernel_cache.dictionary()["dylibs"][0]["segments"]) == 4
  17     # bar.kext
  18     assert kernel_cache.dictionary()["dylibs"][1]["name"] == "com.apple.bar"
  19     assert kernel_cache.dictionary()["dylibs"][1]["segments"][2]["name"] == "__DATA_CONST"
  20     assert kernel_cache.dictionary()["dylibs"][1]["segments"][2]["vmAddr"] == "0xFFFFFFF00701C000"
  21     # foo.kext
  22     assert kernel_cache.dictionary()["dylibs"][2]["name"] == "com.apple.foo"
  23
  24     # Symbols
  25     kernel_cache.analyze("/kext-bind-to-kext-arm64-chains/main.kc", ["-symbols", "-arch", "arm64"])
  26     assert kernel_cache.dictionary()["dylibs"][2]["name"] == "com.apple.foo"
  27     assert kernel_cache.dictionary()["dylibs"][2]["global-symbols"][0]["name"] == "_foo"
  28     assert kernel_cache.dictionary()["dylibs"][2]["global-symbols"][0]["vmAddr"] == "0xFFFFFFF007018020"
  29
  30     # Check the fixups
  31     kernel_cache.analyze("/kext-bind-to-kext-arm64-chains/main.kc", ["-fixups", "-arch", "arm64"])
  32     assert len(kernel_cache.dictionary()["fixups"]) == 2
  33     # bar.kext: extern int foo();
  34     assert kernel_cache.dictionary()["fixups"]["0x20000"] == "kc(0) + 0xFFFFFFF007014000"
  35     # main.kernel: __typeof(&func) funcPtr = &func;
  36     assert kernel_cache.dictionary()["fixups"]["0x18000"] == "kc(0) + 0xFFFFFFF007018020"
  37     assert len(kernel_cache.dictionary()["dylibs"]) == 3
  38     assert kernel_cache.dictionary()["dylibs"][0]["name"] == "com.apple.kernel"
  39     assert kernel_cache.dictionary()["dylibs"][0]["fixups"] == "none"
  40     assert kernel_cache.dictionary()["dylibs"][1]["name"] == "com.apple.bar"
  41     assert kernel_cache.dictionary()["dylibs"][1]["fixups"] == "none"
  42     assert kernel_cache.dictionary()["dylibs"][2]["name"] == "com.apple.foo"
  43     assert kernel_cache.dictionary()["dylibs"][2]["fixups"] == "none"
  44
  45
  46 # [~]> xcrun -sdk iphoneos.internal cc -arch arm64 -Wl,-static -mkernel -Wl,-fixup_chains -Wl,-kernel -nostdlib -Wl,-add_split_seg_info -Wl,-e,__start -Wl,-pie main.c -Wl,-pagezero_size,0x0 -Wl,-rename_section,__TEXT,__text,__TEXT_EXEC,__text -o main.kernel  -Wl,-image_base,0xfffffff007004000 -Wl,-install_name,/usr/lib/swift/split.seg.v2.hack
  47 # [~]> xcrun -sdk iphoneos.internal cc -arch arm64 -Wl,-kext -mkernel -nostdlib -Wl,-add_split_seg_info -Wl,-fixup_chains foo.c -o extensions/foo.kext/foo
  48 # [~]> xcrun -sdk iphoneos.internal cc -arch arm64 -Wl,-kext -mkernel -nostdlib -Wl,-add_split_seg_info -Wl,-fixup_chains bar.c -o extensions/bar.kext/bar
  49 # [~]> rm -r extensions/*.kext/*.ld
  50