testing/kernel-cache-tests/packed-kext-text/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-text/main.kc", "/packed-kext-text/main.kernel", "/packed-kext-text/extensions", ["com.apple.foo", "com.apple.bar"], [])
  11     kernel_cache.analyze("/packed-kext-text/main.kc", ["-layout", "-arch", "arm64"])
  12
  13     assert kernel_cache.dictionary()["cache-segments"][2]["name"] == "__TEXT_EXEC"
  14     assert kernel_cache.dictionary()["cache-segments"][2]["vmAddr"] == "0x8000"
  15     assert kernel_cache.dictionary()["cache-segments"][2]["vmSize"] == "0xC000"
  16
  17     assert len(kernel_cache.dictionary()["dylibs"]) == 3
  18     # main.kernel
  19     assert kernel_cache.dictionary()["dylibs"][0]["name"] == "com.apple.kernel"
  20     assert kernel_cache.dictionary()["dylibs"][0]["segments"][1]["name"] == "__TEXT_EXEC"
  21     assert kernel_cache.dictionary()["dylibs"][0]["segments"][1]["vmAddr"] == "0xC000"
  22     assert kernel_cache.dictionary()["dylibs"][0]["segments"][1]["vmSize"] == "0x4000"
  23     # bar.kext
  24     assert kernel_cache.dictionary()["dylibs"][1]["name"] == "com.apple.bar"
  25     assert kernel_cache.dictionary()["dylibs"][1]["segments"][1]["name"] == "__TEXT_EXEC"
  26     assert kernel_cache.dictionary()["dylibs"][1]["segments"][1]["vmAddr"] == "0x10000"
  27     assert kernel_cache.dictionary()["dylibs"][1]["segments"][1]["vmSize"] == "0x20"
  28     # foo.kext
  29     assert kernel_cache.dictionary()["dylibs"][2]["name"] == "com.apple.foo"
  30     assert kernel_cache.dictionary()["dylibs"][2]["segments"][1]["name"] == "__TEXT_EXEC"
  31     assert kernel_cache.dictionary()["dylibs"][2]["segments"][1]["vmAddr"] == "0x10020"
  32     assert kernel_cache.dictionary()["dylibs"][2]["segments"][1]["vmSize"] == "0xC"
  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