testing/kernel-cache-tests/kext-bind-to-kpi-private-symbol-set/test.py

   1 #!/usr/bin/python2.7
   2
   3 import os
   4 import KernelCollection
   5
   6 # This verifies that an Apple kext can bind to KPI.private with a symbol set in the kext
   7 # com.apple.kpi.private exports foo and bar.kext uses it
   8
   9 def check(kernel_cache):
  10     kernel_cache.buildKernelCollection("arm64", "/kext-bind-to-kpi-private-symbol-set/main.kc", "/kext-bind-to-kpi-private-symbol-set/main.kernel", "/kext-bind-to-kpi-private-symbol-set/extensions", ["com.apple.bar"], [])
  11     kernel_cache.analyze("/kext-bind-to-kpi-private-symbol-set/main.kc", ["-layout", "-arch", "arm64"])
  12
  13     assert len(kernel_cache.dictionary()["dylibs"]) == 2
  14     # main.kernel
  15     assert kernel_cache.dictionary()["dylibs"][0]["name"] == "com.apple.kernel"
  16     # bar.kext
  17     assert kernel_cache.dictionary()["dylibs"][1]["name"] == "com.apple.bar"
  18     assert len(kernel_cache.dictionary()["dylibs"][1]["segments"]) == 4
  19     assert kernel_cache.dictionary()["dylibs"][1]["segments"][2]["name"] == "__DATA"
  20     assert kernel_cache.dictionary()["dylibs"][1]["segments"][2]["vmAddr"] == "0x18000"
  21
  22     kernel_cache.analyze("/kext-bind-to-kpi-private-symbol-set/main.kc", ["-symbols", "-arch", "arm64"])
  23     assert kernel_cache.dictionary()["dylibs"][0]["name"] == "com.apple.kernel"
  24     assert kernel_cache.dictionary()["dylibs"][0]["global-symbols"][2]["name"] == "_foo"
  25     assert kernel_cache.dictionary()["dylibs"][0]["global-symbols"][2]["vmAddr"] == "0xC00C"
  26
  27     # Check the fixups
  28     kernel_cache.analyze("/kext-bind-to-kpi-private-symbol-set/main.kc", ["-fixups", "-arch", "arm64"])
  29     assert len(kernel_cache.dictionary()["fixups"]) == 1
  30     assert kernel_cache.dictionary()["fixups"]["0x18000"] == "kc(0) + 0xC00C"
  31     assert len(kernel_cache.dictionary()["dylibs"]) == 2
  32     assert kernel_cache.dictionary()["dylibs"][0]["name"] == "com.apple.kernel"
  33     assert kernel_cache.dictionary()["dylibs"][0]["fixups"] == "none"
  34     assert kernel_cache.dictionary()["dylibs"][1]["name"] == "com.apple.bar"
  35     assert kernel_cache.dictionary()["dylibs"][1]["fixups"] == "none"
  36
  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 -Wl,-no_data_const bar.c -o extensions/bar.kext/bar
  40 # [~]> rm -r extensions/*.kext/*.ld
  41