testing/kernel-cache-tests/text-fixups-x86_64-auxkc/test.py

   1 #!/usr/bin/python2.7
   2
   3 import os
   4 import KernelCollection
   5
   6
   7 def findGlobalSymbolVMAddr(kernel_cache, dylib_index, symbol_name):
   8     for symbol_and_addr in kernel_cache.dictionary()["dylibs"][dylib_index]["global-symbols"]:
   9         if symbol_and_addr["name"] == symbol_name:
  10             return symbol_and_addr["vmAddr"]
  11     return None
  12
  13 def check(kernel_cache):
  14     kernel_cache.buildKernelCollection("x86_64", "/text-fixups-x86_64-auxkc/main.kc", "/text-fixups-x86_64-auxkc/main.kernel", "/text-fixups-x86_64-auxkc/extensions", [], [])
  15     kernel_cache.analyze("/text-fixups-x86_64-auxkc/main.kc", ["-layout", "-arch", "x86_64"])
  16
  17     assert len(kernel_cache.dictionary()["dylibs"]) == 1
  18     assert kernel_cache.dictionary()["dylibs"][0]["name"] == "com.apple.kernel"
  19
  20     # Now build an aux cache using the baseline kernel collection
  21     kernel_cache.buildAuxKernelCollection("x86_64", "/text-fixups-x86_64-auxkc/aux.kc", "/text-fixups-x86_64-auxkc/main.kc", "", "/text-fixups-x86_64-auxkc/extensions", ["com.apple.foo", "com.apple.bar"], [])
  22     kernel_cache.analyze("/text-fixups-x86_64-auxkc/aux.kc", ["-layout", "-arch", "x86_64"])
  23     assert len(kernel_cache.dictionary()["dylibs"]) == 2
  24     # bar.kext
  25     assert kernel_cache.dictionary()["dylibs"][0]["name"] == "com.apple.bar"
  26     assert len(kernel_cache.dictionary()["dylibs"][0]["segments"]) == 3
  27     assert kernel_cache.dictionary()["dylibs"][0]["segments"][0]["name"] == "__TEXT"
  28     assert kernel_cache.dictionary()["dylibs"][0]["segments"][0]["vmAddr"] == "0x8000"
  29     assert kernel_cache.dictionary()["dylibs"][0]["segments"][1]["name"] == "__DATA"
  30     assert kernel_cache.dictionary()["dylibs"][0]["segments"][1]["vmAddr"] == "0x9000"
  31     assert kernel_cache.dictionary()["dylibs"][0]["segments"][2]["name"] == "__LINKEDIT"
  32     assert kernel_cache.dictionary()["dylibs"][0]["segments"][2]["vmAddr"] == "0xC000"
  33     # foo.kext
  34     assert kernel_cache.dictionary()["dylibs"][1]["name"] == "com.apple.foo"
  35     assert len(kernel_cache.dictionary()["dylibs"][1]["segments"]) == 3
  36     assert kernel_cache.dictionary()["dylibs"][1]["segments"][0]["name"] == "__TEXT"
  37     assert kernel_cache.dictionary()["dylibs"][1]["segments"][0]["vmAddr"] == "0xA000"
  38     assert kernel_cache.dictionary()["dylibs"][1]["segments"][1]["name"] == "__DATA"
  39     assert kernel_cache.dictionary()["dylibs"][1]["segments"][1]["vmAddr"] == "0xB000"
  40     assert kernel_cache.dictionary()["dylibs"][1]["segments"][2]["name"] == "__LINKEDIT"
  41     assert kernel_cache.dictionary()["dylibs"][1]["segments"][2]["vmAddr"] == "0xC000"
  42
  43     # Find the sybmols the fixups point to
  44     kernel_cache.analyze("/text-fixups-x86_64-auxkc/aux.kc", ["-symbols", "-arch", "x86_64"])
  45     barAddress = findGlobalSymbolVMAddr(kernel_cache, 0, "_bar")
  46     gAddress = findGlobalSymbolVMAddr(kernel_cache, 1, "_g")
  47
  48     # Check the fixups
  49     kernel_cache.analyze("/text-fixups-x86_64-auxkc/aux.kc", ["-fixups", "-arch", "x86_64"])
  50     assert len(kernel_cache.dictionary()["dylibs"]) == 2
  51
  52     # bar.kext
  53     assert kernel_cache.dictionary()["dylibs"][0]["name"] == "com.apple.bar"
  54     assert len(kernel_cache.dictionary()["dylibs"][0]["fixups"]) == 1
  55     assert kernel_cache.dictionary()["dylibs"][0]["fixups"]["0x4FF0"] == "kc(3) + " + barAddress
  56
  57     # foo.kext
  58     assert kernel_cache.dictionary()["dylibs"][1]["name"] == "com.apple.foo"
  59
  60     assert len(kernel_cache.dictionary()["dylibs"][1]["fixups"]) == 1
  61     assert kernel_cache.dictionary()["dylibs"][1]["fixups"]["0x4FF0"] == "kc(3) + " + gAddress
  62
  63 # [~]> xcrun -sdk macosx.internal cc -arch x86_64 -Wl,-static -mkernel -nostdlib -Wl,-kernel -Wl,-e,__start -Wl,-pie main.cpp -Wl,-pagezero_size,0x0 -o main.kernel -Wl,-image_base,0xffffff8000200000 -Wl,-segaddr,__HIB,0xffffff8000100000 -Wl,-add_split_seg_info  -Wl,-read_only_relocs,suppress -Wl,-install_name,/usr/lib/swift/split.seg.v2.hack
  64 # [~]> xcrun -sdk macosx.internal cc -arch x86_64 -Wl,-kext -mkernel -nostdlib foo.c -o extensions/foo.kext/foo
  65 # [~]> xcrun -sdk macosx.internal cc -arch x86_64 -Wl,-kext -mkernel -nostdlib bar.c -o extensions/bar.kext/bar
  66