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

   1 #!/usr/bin/python2.7
   2
   3 import os
   4 import KernelCollection
   5
   6 # This verifies that weak binds point to the same symbol
   7
   8 # FIXME: This should be re-enabled once we know how to handle classic relocs combined with split seg v2.
   9
  10 def check(kernel_cache):
  11     kernel_cache.buildKernelCollection("arm64", "/kext-weak-bind-chained/main.kc", "/kext-weak-bind-chained/main.kernel", "/kext-weak-bind-chained/extensions", ["com.apple.foo", "com.apple.bar"], [])
  12     kernel_cache.analyze("/kext-weak-bind-chained/main.kc", ["-layout", "-arch", "arm64"])
  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     # Check the fixups
  20     kernel_cache.analyze("/kext-weak-bind-chained/main.kc", ["-fixups", "-arch", "arm64"])
  21     assert len(kernel_cache.dictionary()["fixups"]) == 2
  22     assert kernel_cache.dictionary()["fixups"]["0x1C000"] == "kc(0) + 0x1C018"
  23     assert kernel_cache.dictionary()["fixups"]["0x1C010"] == "kc(0) + 0x1C018"
  24     assert len(kernel_cache.dictionary()["dylibs"]) == 3
  25     assert kernel_cache.dictionary()["dylibs"][0]["name"] == "com.apple.kernel"
  26     assert kernel_cache.dictionary()["dylibs"][0]["fixups"] == "none"
  27     assert kernel_cache.dictionary()["dylibs"][1]["name"] == "com.apple.bar"
  28     assert kernel_cache.dictionary()["dylibs"][1]["fixups"] == "none"
  29     assert kernel_cache.dictionary()["dylibs"][2]["name"] == "com.apple.foo"
  30     assert kernel_cache.dictionary()["dylibs"][2]["fixups"] == "none"
  31
  32
  33 # [~]> 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
  34 # [~]> xcrun -sdk iphoneos.internal cc -arch arm64 -Wl,-kext -mkernel -nostdlib -Wl,-add_split_seg_info foo.c -o extensions/foo.kext/foo -Wl,-fixup_chains
  35 # [~]> 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
  36 # [~]> rm -r extensions/*.kext/*.ld
  37