testing/kernel-cache-tests/strip-kexts-locals/test.py

   1 #!/usr/bin/python2.7
   2
   3 import os
   4 import KernelCollection
   5
   6 # Check fine grained stripping of locals
   7
   8 def check(kernel_cache):
   9     kernel_cache.buildKernelCollection("arm64", "/strip-kexts-locals/main.kc", "/strip-kexts-locals/main.kernel", "/strip-kexts-locals/extensions", ["com.apple.foo:locals", "com.apple.bar"], [])
  10     kernel_cache.analyze("/strip-kexts-locals/main.kc", ["-layout", "-arch", "arm64"])
  11
  12     # Check the symbols
  13     kernel_cache.analyze("/strip-kexts-locals/main.kc", ["-symbols", "-arch", "arm64"])
  14     assert len(kernel_cache.dictionary()["dylibs"]) == 3
  15     # kernel
  16     assert kernel_cache.dictionary()["dylibs"][0]["name"] == "com.apple.kernel"
  17     assert len(kernel_cache.dictionary()["dylibs"][0]["global-symbols"]) == 2
  18     assert kernel_cache.dictionary()["dylibs"][0]["global-symbols"][0]["name"] == "__mh_execute_header"
  19     assert kernel_cache.dictionary()["dylibs"][0]["global-symbols"][1]["name"] == "__start"
  20     assert len(kernel_cache.dictionary()["dylibs"][0]["local-symbols"]) == 1
  21     assert kernel_cache.dictionary()["dylibs"][0]["local-symbols"][0]["name"] == "_z"
  22     # bar
  23     assert kernel_cache.dictionary()["dylibs"][1]["name"] == "com.apple.bar"
  24     assert len(kernel_cache.dictionary()["dylibs"][1]["global-symbols"]) == 1
  25     assert kernel_cache.dictionary()["dylibs"][1]["global-symbols"][0]["name"] == "_bar"
  26     assert len(kernel_cache.dictionary()["dylibs"][1]["local-symbols"]) == 1
  27     assert kernel_cache.dictionary()["dylibs"][1]["local-symbols"][0]["name"] == "_y"
  28     # foo
  29     assert kernel_cache.dictionary()["dylibs"][2]["name"] == "com.apple.foo"
  30     assert len(kernel_cache.dictionary()["dylibs"][2]["global-symbols"]) == 1
  31     assert kernel_cache.dictionary()["dylibs"][2]["global-symbols"][0]["name"] == "_foo"
  32     assert kernel_cache.dictionary()["dylibs"][2]["local-symbols"] == "none"
  33
  34
  35 # [~]> 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
  36 # [~]> xcrun -sdk iphoneos.internal cc -arch arm64 -Wl,-kext -mkernel -nostdlib -Wl,-add_split_seg_info foo.c -o extensions/foo.kext/foo
  37 # [~]> xcrun -sdk iphoneos.internal cc -arch arm64 -Wl,-kext -mkernel -nostdlib -Wl,-add_split_seg_info bar.c -o extensions/bar.kext/bar
  38 # [~]> rm -r extensions/*.kext/*.ld
  39