testing/kernel-cache-tests/pageablekc-uuid/test.py

   1 #!/usr/bin/python2.7
   2
   3 import os
   4 import KernelCollection
   5
   6 # Verify that an pageableKC references the UUID of the base KC
   7
   8 def check(kernel_cache):
   9     # First build a kernel collection
  10     kernel_cache.buildKernelCollection("arm64", "/pageablekc-uuid/main.kc", "/pageablekc-uuid/main.kernel", "/pageablekc-uuid/extensions", [], [])
  11     kernel_cache.analyze("/pageablekc-uuid/main.kc", ["-layout", "-arch", "arm64"])
  12
  13     # Check the kernel UUID
  14     kernel_cache.analyze("/pageablekc-uuid/main.kc", ["-uuid", "-arch", "arm64"])
  15     kernelUUID = kernel_cache.dictionary()["uuid"]
  16     assert kernelUUID != "00000000-0000-0000-0000-000000000000"
  17     assert kernelUUID == kernel_cache.dictionary()["prelink-info-uuid"]
  18
  19     # Now build an pageable cache using the baseline kernel collection
  20     kernel_cache.buildPageableKernelCollection("arm64", "/pageablekc-uuid/pageable.kc", "/pageablekc-uuid/main.kc", "/pageablekc-uuid/extensions", ["com.apple.foo", "com.apple.bar"], [])
  21
  22     # Check the pageable UUID
  23     kernel_cache.analyze("/pageablekc-uuid/pageable.kc", ["-uuid", "-arch", "arm64"])
  24     assert kernel_cache.dictionary()["uuid"] != "00000000-0000-0000-0000-000000000000"
  25     assert kernel_cache.dictionary()["prelink-info-base-uuid"] == kernelUUID
  26
  27
  28 # [~]> 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
  29 # [~]> xcrun -sdk iphoneos.internal cc -arch arm64 -Wl,-kext -mkernel -nostdlib -Wl,-add_split_seg_info foo.c -o extensions/foo.kext/foo
  30 # [~]> xcrun -sdk iphoneos.internal cc -arch arm64 -Wl,-kext -mkernel -nostdlib -Wl,-add_split_seg_info bar.c -o extensions/bar.kext/bar
  31 # [~]> rm -r extensions/*.kext/*.ld
  32