testing/kernel-cache-tests/ppl-data-const/test.py

   1 #!/usr/bin/python2.7
   2
   3 import os
   4 import KernelCollection
   5
   6 # PPL data const should be folded in under data const and allowed to have fixups
   7
   8 def check(kernel_cache):
   9     kernel_cache.buildKernelCollection("arm64", "/ppl-data-const/main.kc", "/ppl-data-const/main.kernel", "/ppl-data-const/extensions", ["com.apple.foo", "com.apple.bar"], [])
  10     kernel_cache.analyze("/ppl-data-const/main.kc", ["-layout", "-arch", "arm64"])
  11
  12     assert kernel_cache.dictionary()["cache-segments"][3]["name"] == "__DATA_CONST"
  13     assert kernel_cache.dictionary()["cache-segments"][3]["vmAddr"] == "0x18000"
  14     assert kernel_cache.dictionary()["cache-segments"][3]["vmSize"] == "0x8000"
  15
  16     assert len(kernel_cache.dictionary()["dylibs"]) == 3
  17     # main.kernel
  18     assert kernel_cache.dictionary()["dylibs"][0]["name"] == "com.apple.kernel"
  19     assert kernel_cache.dictionary()["dylibs"][0]["segments"][3]["name"] == "__PPLDATA_CONST"
  20     assert kernel_cache.dictionary()["dylibs"][0]["segments"][3]["vmAddr"] == "0x18000"
  21     # bar.kext
  22     assert kernel_cache.dictionary()["dylibs"][1]["name"] == "com.apple.bar"
  23     # foo.kext
  24     assert kernel_cache.dictionary()["dylibs"][2]["name"] == "com.apple.foo"
  25
  26     # Check we have the correct addresses of the symbols being bound to
  27     kernel_cache.analyze("/ppl-data-const/main.kc", ["-symbols", "-arch", "arm64"])
  28     # main.kernel
  29     # int g = &x;
  30     assert kernel_cache.dictionary()["dylibs"][0]["global-symbols"][3]["name"] == "_x"
  31     assert kernel_cache.dictionary()["dylibs"][0]["global-symbols"][3]["vmAddr"] == "0x24000"
  32     # foo.kext
  33     # foo()
  34     assert kernel_cache.dictionary()["dylibs"][2]["global-symbols"][0]["name"] == "_foo"
  35     assert kernel_cache.dictionary()["dylibs"][2]["global-symbols"][0]["vmAddr"] == "0x14030"
  36
  37     kernel_cache.analyze("/ppl-data-const/main.kc", ["-fixups", "-arch", "arm64"])
  38     # main.kernel
  39     # int g = &x;
  40     assert kernel_cache.dictionary()["fixups"]["0x18000"] == "kc(0) + 0x24000"
  41     # foo.kext
  42     # foo()
  43     assert kernel_cache.dictionary()["fixups"]["0x1C000"] == "kc(0) + 0x14030"
  44
  45 # [~]> 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,-rename_section,__DATA,__data,__PPLDATA_CONST,__data -Wl,-segprot,__PPLDATA_CONST,r--,r-- main.c -o main.kernel
  46 # [~]> xcrun -sdk iphoneos.internal cc -arch arm64 -Wl,-kext -mkernel -nostdlib -Wl,-add_split_seg_info foo.c -o extensions/foo.kext/foo
  47 # [~]> xcrun -sdk iphoneos.internal cc -arch arm64 -Wl,-kext -mkernel -nostdlib -Wl,-add_split_seg_info bar.c -o extensions/bar.kext/bar
  48 # [~]> rm -r extensions/*.kext/*.ld
  49