testing/kernel-cache-tests/packed-kext-data/test.py

   1 #!/usr/bin/python2.7
   2
   3 import os
   4 import KernelCollection
   5
   6 # __DATA should be packed at sub-page alignment
   7 # But only in the kexts.  The kernel pages should not be packed
   8
   9 def check(kernel_cache):
  10     kernel_cache.buildKernelCollection("arm64", "/packed-kext-data/main.kc", "/packed-kext-data/main.kernel", "/packed-kext-data/extensions", ["com.apple.foo", "com.apple.bar"], [])
  11     kernel_cache.analyze("/packed-kext-data/main.kc", ["-layout", "-arch", "arm64"])
  12
  13     assert len(kernel_cache.dictionary()["cache-segments"]) == 7
  14     assert kernel_cache.dictionary()["cache-segments"][5]["name"] == "__DATA"
  15     assert kernel_cache.dictionary()["cache-segments"][5]["vmAddr"] == "0x20000"
  16     assert kernel_cache.dictionary()["cache-segments"][5]["vmSize"] == "0x4000"
  17
  18     assert len(kernel_cache.dictionary()["dylibs"]) == 3
  19     # bar.kext
  20     assert kernel_cache.dictionary()["dylibs"][1]["name"] == "com.apple.bar"
  21     assert kernel_cache.dictionary()["dylibs"][1]["segments"][2]["name"] == "__DATA"
  22     assert kernel_cache.dictionary()["dylibs"][1]["segments"][2]["vmAddr"] == "0x20000"
  23     assert kernel_cache.dictionary()["dylibs"][1]["segments"][2]["vmSize"] == "0x4"
  24     # foo.kext
  25     assert kernel_cache.dictionary()["dylibs"][2]["name"] == "com.apple.foo"
  26     assert len(kernel_cache.dictionary()["dylibs"][2]["segments"]) == 4
  27     assert kernel_cache.dictionary()["dylibs"][2]["segments"][2]["name"] == "__DATA"
  28     assert kernel_cache.dictionary()["dylibs"][2]["segments"][2]["vmAddr"] == "0x20004"
  29     assert kernel_cache.dictionary()["dylibs"][2]["segments"][2]["vmSize"] == "0x4"
  30
  31
  32 # [~]> 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
  33 # [~]> xcrun -sdk iphoneos.internal cc -arch arm64 -Wl,-kext -mkernel -nostdlib -Wl,-add_split_seg_info foo.c -o extensions/foo.kext/foo
  34 # [~]> xcrun -sdk iphoneos.internal cc -arch arm64 -Wl,-kext -mkernel -nostdlib -Wl,-add_split_seg_info bar.c -o extensions/bar.kext/bar
  35 # [~]> rm -r extensions/*.kext/*.ld
  36