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DynamicLoader+Userland: Enable RELRO for shared libraries as well :^)

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To support this, I had to reorganize the "load_elf" function into two
passes. First we map all the dynamic objects, to get their symbols
into the global lookup table. Then we link all the dynamic objects.

So many read-only GOT's! :^)
This commit is contained in:
Andreas Kling 2021-02-18 22:49:58 +01:00
parent fa4c249425
commit 713b3b36be
2 changed files with 31 additions and 23 deletions
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2
CMakeLists.txt
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@ -146,7 +146,7 @@ endforeach()
set(CMAKE_INSTALL_NAME_TOOL "")
set(CMAKE_SHARED_LIBRARY_SUFFIX ".so")
set(CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS "-shared -Wl,--hash-style=gnu")
set(CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS "-shared -Wl,--hash-style=gnu,-z,relro,-z,now")
set(CMAKE_CXX_LINK_FLAGS "-Wl,--hash-style=gnu,-z,relro,-z,now")
# We disable it completely because it makes cmake very spammy.