testing/kernel-cache-tests/symbol-sets-and-codeless-kexts/test.py

   1 #!/usr/bin/python2.7
   2
   3 import os
   4 import KernelCollection
   5
   6 # Test that the codeless bar.kext (with bundle id com.apple.bar) doesn't interfere with foo using the symbol set of the same bundle id
   7
   8 def check(kernel_cache):
   9     kernel_cache.buildKernelCollection("arm64", "/symbol-sets-and-codeless-kexts/main.kc", "/symbol-sets-and-codeless-kexts/main.kernel", "/symbol-sets-and-codeless-kexts/extensions", ["com.apple.foo", "com.apple.bar", "com.apple.baz"], [])
  10     kernel_cache.analyze("/symbol-sets-and-codeless-kexts/main.kc", ["-layout", "-arch", "arm64"])
  11
  12     assert len(kernel_cache.dictionary()["dylibs"]) == 2
  13     assert kernel_cache.dictionary()["dylibs"][0]["name"] == "com.apple.kernel"
  14     assert kernel_cache.dictionary()["dylibs"][1]["name"] == "com.apple.foo"
  15     assert kernel_cache.dictionary()["dylibs"][1]["segments"][2]["name"] == "__DATA_CONST"
  16     assert kernel_cache.dictionary()["dylibs"][1]["segments"][2]["vmAddr"] == "0x14000"
  17
  18     # Find the address of the symbols to bind to
  19     kernel_cache.analyze("/symbol-sets-and-codeless-kexts/main.kc", ["-symbols", "-arch", "arm64"])
  20     assert len(kernel_cache.dictionary()["dylibs"]) == 2
  21     assert kernel_cache.dictionary()["dylibs"][0]["name"] == "com.apple.kernel"
  22     assert kernel_cache.dictionary()["dylibs"][0]["global-symbols"][2]["name"] == "_symbol_from_xnu"
  23     assert kernel_cache.dictionary()["dylibs"][0]["global-symbols"][2]["vmAddr"] == "0xC000"
  24     assert kernel_cache.dictionary()["dylibs"][0]["global-symbols"][3]["name"] == "_symbol_from_xnu_no_alias"
  25     assert kernel_cache.dictionary()["dylibs"][0]["global-symbols"][3]["vmAddr"] == "0xC00C"
  26
  27     # Check the fixups
  28     kernel_cache.analyze("/symbol-sets-and-codeless-kexts/main.kc", ["-fixups", "-arch", "arm64"])
  29     assert len(kernel_cache.dictionary()["fixups"]) == 2
  30     assert kernel_cache.dictionary()["fixups"]["0x14000"] == "kc(0) + 0xC000"
  31     assert kernel_cache.dictionary()["fixups"]["0x14008"] == "kc(0) + 0xC00C"
  32     assert len(kernel_cache.dictionary()["dylibs"]) == 2
  33     assert kernel_cache.dictionary()["dylibs"][0]["name"] == "com.apple.kernel"
  34     assert kernel_cache.dictionary()["dylibs"][0]["fixups"] == "none"
  35     assert kernel_cache.dictionary()["dylibs"][1]["name"] == "com.apple.foo"
  36     assert kernel_cache.dictionary()["dylibs"][1]["fixups"] == "none"
  37
  38 # [~]> 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 -Wl,-sectcreate,__LINKINFO,__symbolsets,SymbolSets.plist -Wl,-segprot,__LINKINFO,r--,r--
  39 # [~]> xcrun -sdk iphoneos.internal cc -arch arm64 -Wl,-kext -mkernel -nostdlib -Wl,-add_split_seg_info foo.c -o extensions/foo.kext/foo
  40 # [~]> rm -r extensions/foo.kext/*.ld
  41