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

   1 #!/usr/bin/python2.7
   2
   3 import os
   4 import KernelCollection
   5
   6 # Verify that an auxKC references the UUID of the base KC
   7 # And also the UUID of the pageable KC
   8
   9 def check(kernel_cache):
  10     # First build a kernel collection
  11     kernel_cache.buildKernelCollection("arm64", "/auxkc-pageablekc-uuid/main.kc", "/auxkc-pageablekc-uuid/main.kernel", "/auxkc-pageablekc-uuid/extensions", [], [])
  12     kernel_cache.analyze("/auxkc-pageablekc-uuid/main.kc", ["-layout", "-arch", "arm64"])
  13
  14     # Check the kernel UUID
  15     kernel_cache.analyze("/auxkc-pageablekc-uuid/main.kc", ["-uuid", "-arch", "arm64"])
  16     kernelUUID = kernel_cache.dictionary()["uuid"]
  17     assert kernelUUID != "00000000-0000-0000-0000-000000000000"
  18     assert kernelUUID == kernel_cache.dictionary()["prelink-info-uuid"]
  19
  20     # Now build a pageable cache using the baseline kernel collection
  21     kernel_cache.buildPageableKernelCollection("arm64", "/auxkc-pageablekc-uuid/pageable.kc", "/auxkc-pageablekc-uuid/main.kc", "/auxkc-pageablekc-uuid/extensions", ["com.apple.foo", "com.apple.bar"], [])
  22
  23     # Check the pageable UUID
  24     kernel_cache.analyze("/auxkc-pageablekc-uuid/pageable.kc", ["-uuid", "-arch", "arm64"])
  25     pageableUUID = kernel_cache.dictionary()["uuid"]
  26     assert pageableUUID != "00000000-0000-0000-0000-000000000000"
  27     assert kernel_cache.dictionary()["prelink-info-base-uuid"] == kernelUUID
  28
  29     # Now build an aux cache using the baseline and pageable kernel collections
  30     kernel_cache.buildAuxKernelCollection("arm64", "/auxkc-pageablekc-uuid/aux.kc", "/auxkc-pageablekc-uuid/main.kc", "/auxkc-pageablekc-uuid/pageable.kc", "/auxkc-pageablekc-uuid/extensions", ["com.apple.foo", "com.apple.bar"], [])
  31
  32     # Check the aux UUID
  33     kernel_cache.analyze("/auxkc-pageablekc-uuid/aux.kc", ["-uuid", "-arch", "arm64"])
  34     assert kernel_cache.dictionary()["uuid"] != "00000000-0000-0000-0000-000000000000"
  35     assert kernel_cache.dictionary()["prelink-info-base-uuid"] == kernelUUID
  36     assert kernel_cache.dictionary()["prelink-info-pageable-uuid"] == pageableUUID
  37
  38
  39 # [~]> 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
  40 # [~]> xcrun -sdk iphoneos.internal cc -arch arm64 -Wl,-kext -mkernel -nostdlib -Wl,-add_split_seg_info foo.c -o extensions/foo.kext/foo
  41 # [~]> xcrun -sdk iphoneos.internal cc -arch arm64 -Wl,-kext -mkernel -nostdlib -Wl,-add_split_seg_info bar.c -o extensions/bar.kext/bar
  42 # [~]> rm -r extensions/*.kext/*.ld
  43