testing/kernel-cache-tests/kext-missing-weak-bind/test.py

   1 #!/usr/bin/python2.7
   2
   3 import os
   4 import KernelCollection
   5
   6 # Check that weak binds can be missing, so long as we check for the magic symbol
   7
   8 def check(kernel_cache):
   9     kernel_cache.buildKernelCollection("arm64", "/kext-missing-weak-bind/main.kc", "/kext-missing-weak-bind/main.kernel", "/kext-missing-weak-bind/extensions", ["com.apple.foo", "com.apple.bar"], [])
  10     kernel_cache.analyze("/kext-missing-weak-bind/main.kc", ["-layout", "-arch", "arm64"])
  11     assert kernel_cache.dictionary()["cache-segments"][3]["name"] == "__DATA_CONST"
  12     assert kernel_cache.dictionary()["cache-segments"][3]["vmAddr"] == "0x18000"
  13
  14     assert len(kernel_cache.dictionary()["dylibs"]) == 3
  15     assert kernel_cache.dictionary()["dylibs"][0]["name"] == "com.apple.kernel"
  16     assert kernel_cache.dictionary()["dylibs"][1]["name"] == "com.apple.bar"
  17     assert kernel_cache.dictionary()["dylibs"][2]["name"] == "com.apple.foo"
  18
  19     # Symbols
  20     kernel_cache.analyze("/kext-missing-weak-bind/main.kc", ["-symbols", "-arch", "arm64"])
  21     # kernel
  22     assert kernel_cache.dictionary()["dylibs"][0]["name"] == "com.apple.kernel"
  23     assert kernel_cache.dictionary()["dylibs"][0]["global-symbols"][2]["name"] == "_gOSKextUnresolved"
  24     assert kernel_cache.dictionary()["dylibs"][0]["global-symbols"][2]["vmAddr"] == "0x20000"
  25
  26     # Check the fixups
  27     kernel_cache.analyze("/kext-missing-weak-bind/main.kc", ["-fixups", "-arch", "arm64"])
  28     assert len(kernel_cache.dictionary()["fixups"]) == 4
  29     assert kernel_cache.dictionary()["fixups"]["0x18000"] == "kc(0) + 0x20000"
  30     assert kernel_cache.dictionary()["fixups"]["0x18008"] == "kc(0) + 0x20000"
  31     assert kernel_cache.dictionary()["fixups"]["0x18010"] == "kc(0) + 0x20000"
  32     assert kernel_cache.dictionary()["fixups"]["0x18018"] == "kc(0) + 0x20000"
  33     assert len(kernel_cache.dictionary()["dylibs"]) == 3
  34     assert kernel_cache.dictionary()["dylibs"][0]["name"] == "com.apple.kernel"
  35     assert kernel_cache.dictionary()["dylibs"][0]["fixups"] == "none"
  36     assert kernel_cache.dictionary()["dylibs"][1]["name"] == "com.apple.bar"
  37     assert kernel_cache.dictionary()["dylibs"][1]["fixups"] == "none"
  38     assert kernel_cache.dictionary()["dylibs"][2]["name"] == "com.apple.foo"
  39     assert kernel_cache.dictionary()["dylibs"][2]["fixups"] == "none"
  40
  41
  42 # [~]> 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 -Wl,-sectcreate,__LINKINFO,__symbolsets,SymbolSets.plist -Wl,-segprot,__LINKINFO,r--,r-- main.c -o main.kernel
  43 # [~]> xcrun -sdk iphoneos.internal cc -arch arm64 -Wl,-kext -mkernel -nostdlib -Wl,-add_split_seg_info foo.c -o extensions/foo.kext/foo
  44 # [~]> xcrun -sdk iphoneos.internal cc -arch arm64 -Wl,-kext -mkernel -nostdlib -Wl,-add_split_seg_info bar.c -o extensions/bar.kext/bar -Wl,-fixup_chains
  45 # [~]> rm -r extensions/*.kext/*.ld
  46