testing/kernel-cache-tests/auxkc-bind-to-pageablekc/test.py

   1 #!/usr/bin/python2.7
   2
   3 import os
   4 import KernelCollection
   5
   6 # This verifies that a kext can bind to another kext
   7 # foo.kext exports foo and bar.kext uses it
   8
   9 def check(kernel_cache):
  10     kernel_cache.buildKernelCollection("arm64", "/auxkc-bind-to-pageablekc/main.kc", "/auxkc-bind-to-pageablekc/main.kernel", "", [], [])
  11     kernel_cache.analyze("/auxkc-bind-to-pageablekc/main.kc", ["-layout", "-arch", "arm64"])
  12
  13     # Now build an pageable cache using the baseline kernel collection
  14     kernel_cache.buildPageableKernelCollection("arm64", "/auxkc-bind-to-pageablekc/pageable.kc", "/auxkc-bind-to-pageablekc/main.kc", "/auxkc-bind-to-pageablekc/extensions", ["com.apple.foo"], [])
  15     kernel_cache.analyze("/auxkc-bind-to-pageablekc/pageable.kc", ["-symbols", "-arch", "arm64"])
  16
  17     assert kernel_cache.dictionary()["dylibs"][0]["name"] == "com.apple.foo"
  18     assert kernel_cache.dictionary()["dylibs"][0]["global-symbols"][0]["name"] == "_foo"
  19     assert kernel_cache.dictionary()["dylibs"][0]["global-symbols"][0]["vmAddr"] == "0x8000"
  20
  21     # Now build an aux cache using the baseline and pageable kernel collections
  22     kernel_cache.buildAuxKernelCollection("arm64", "/auxkc-bind-to-pageablekc/aux.kc", "/auxkc-bind-to-pageablekc/main.kc", "/auxkc-bind-to-pageablekc/pageable.kc", "/auxkc-bind-to-pageablekc/extensions", ["com.apple.bar"], [])
  23     kernel_cache.analyze("/auxkc-bind-to-pageablekc/aux.kc", ["-fixups", "-arch", "arm64"])
  24
  25     # bar.kext
  26     assert len(kernel_cache.dictionary()["fixups"]) == 1
  27     # extern int foo()
  28     assert kernel_cache.dictionary()["fixups"]["0x4000"] == "kc(1) + 0x8000"
  29
  30
  31 # [~]> 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
  32 # [~]> xcrun -sdk iphoneos.internal cc -arch arm64 -Wl,-kext -mkernel -nostdlib -Wl,-add_split_seg_info -Wl,-no_data_const foo.c -o extensions/foo.kext/foo
  33 # [~]> 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
  34 # [~]> rm -r extensions/*.kext/*.ld
  35