testing/kernel-cache-tests/symbol-sets/test.py

   1 #!/usr/bin/python2.7
   2
   3 import os
   4 import KernelCollection
   5
   6 # This verifies that we use the symbol set when resolving symbols in to the kernel
   7 # Note symbol sets are the plist which is embedded in to the kernel
   8
   9 def check(kernel_cache):
  10     kernel_cache.buildKernelCollection("arm64", "/symbol-sets/main.kc", "/symbol-sets/main.kernel", "/symbol-sets/extensions", ["com.apple.foo"], [])
  11     kernel_cache.analyze("/symbol-sets/main.kc", ["-layout", "-arch", "arm64"])
  12
  13     assert len(kernel_cache.dictionary()["dylibs"]) == 2
  14     assert kernel_cache.dictionary()["dylibs"][0]["name"] == "com.apple.kernel"
  15     assert kernel_cache.dictionary()["dylibs"][1]["name"] == "com.apple.foo"
  16     assert kernel_cache.dictionary()["dylibs"][1]["segments"][2]["name"] == "__DATA_CONST"
  17     assert kernel_cache.dictionary()["dylibs"][1]["segments"][2]["vmAddr"] == "0x14000"
  18
  19     # Find the address of the symbols to bind to
  20     kernel_cache.analyze("/symbol-sets/main.kc", ["-symbols", "-arch", "arm64"])
  21     assert len(kernel_cache.dictionary()["dylibs"]) == 2
  22     assert kernel_cache.dictionary()["dylibs"][0]["name"] == "com.apple.kernel"
  23     assert kernel_cache.dictionary()["dylibs"][0]["global-symbols"][2]["name"] == "_symbol_from_xnu"
  24     assert kernel_cache.dictionary()["dylibs"][0]["global-symbols"][2]["vmAddr"] == "0xC000"
  25     assert kernel_cache.dictionary()["dylibs"][0]["global-symbols"][3]["name"] == "_symbol_from_xnu_no_alias"
  26     assert kernel_cache.dictionary()["dylibs"][0]["global-symbols"][3]["vmAddr"] == "0xC00C"
  27
  28     # Check the fixups
  29     kernel_cache.analyze("/symbol-sets/main.kc", ["-fixups", "-arch", "arm64"])
  30     assert len(kernel_cache.dictionary()["fixups"]) == 2
  31     assert kernel_cache.dictionary()["fixups"]["0x14000"] == "kc(0) + 0xC000"
  32     assert kernel_cache.dictionary()["fixups"]["0x14008"] == "kc(0) + 0xC00C"
  33     assert len(kernel_cache.dictionary()["dylibs"]) == 2
  34     assert kernel_cache.dictionary()["dylibs"][0]["name"] == "com.apple.kernel"
  35     assert kernel_cache.dictionary()["dylibs"][0]["fixups"] == "none"
  36     assert kernel_cache.dictionary()["dylibs"][1]["name"] == "com.apple.foo"
  37     assert kernel_cache.dictionary()["dylibs"][1]["fixups"] == "none"
  38
  39 # [~]> 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--
  40 # [~]> xcrun -sdk iphoneos.internal cc -arch arm64 -Wl,-kext -mkernel -nostdlib -Wl,-add_split_seg_info foo.c -o extensions/foo.kext/foo
  41 # [~]> rm -r extensions/foo.kext/*.ld
  42