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Userland: Compile a special version of LibELF for DynamicLoader

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... instead of shamelessly stealing its sources.
This commit is contained in:
Dan Klishch 2024-04-24 16:30:16 -04:00 • committed by Andrew Kaster
commit 2925fcd4bc
Notes: sideshowbarker 2024-07-17 09:37:30 +09:00
2 changed files with 15 additions and 10 deletions
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22
Userland/DynamicLoader/CMakeLists.txt
View file

@ -3,19 +3,21 @@ set(LOADER_SOURCES
misc.cpp
)
file(GLOB ELF_SOURCES "../Libraries/LibELF/*.cpp")
add_library(DynamicLoader_CompileOptions INTERFACE)
target_compile_options(DynamicLoader_CompileOptions INTERFACE -fno-rtti -fpie)
target_link_options(DynamicLoader_CompileOptions INTERFACE -nostdlib -fpie)
target_compile_definitions(DynamicLoader_CompileOptions INTERFACE NO_TLS)
add_dependencies(DynamicLoader_CompileOptions install_libc_headers)
file(GLOB LIBC_SOURCES1 "../Libraries/LibC/*.cpp")
file(GLOB LIBC_SOURCES2 "../Libraries/LibC/*/*.cpp")
set(ARCH_FOLDER "${SERENITY_ARCH}")
file(GLOB LIBC_SOURCES3 "../Libraries/LibC/arch/${ARCH_FOLDER}/*.S")
set(ELF_SOURCES ${ELF_SOURCES} "../Libraries/LibELF/Arch/${ARCH_FOLDER}/entry.S" "../Libraries/LibELF/Arch/${ARCH_FOLDER}/plt_trampoline.S" "../Libraries/LibELF/Arch/${ARCH_FOLDER}/tls.cpp")
set(LIBC_SOURCES3 ${LIBC_SOURCES3} "../Libraries/LibC/arch/${ARCH_FOLDER}/fenv.cpp")
if ("${SERENITY_ARCH}" STREQUAL "x86_64")
set(LIBC_SOURCES3 ${LIBC_SOURCES3} "../Libraries/LibC/arch/x86_64/memset.cpp")
elseif ("${SERENITY_ARCH}" STREQUAL "aarch64")
set(ELF_SOURCES ${ELF_SOURCES} "../Libraries/LibELF/Arch/aarch64/tls.S")
endif()
file(GLOB LIBSYSTEM_SOURCES "../Libraries/LibSystem/*.cpp")
@ -29,13 +31,11 @@ list(FILTER LIBC_SOURCES1 EXCLUDE REGEX ".*/LibC/(pthread|semaphore)\\.cpp")
add_definitions(-D_DYNAMIC_LOADER)
set(SOURCES ${LOADER_SOURCES} ${AK_SOURCES} ${ELF_SOURCES} ${LIBC_SOURCES1} ${LIBC_SOURCES2} ${LIBC_SOURCES3} ${LIBSYSTEM_SOURCES})
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-rtti -nostdlib -pie -fpie -DNO_TLS")
set(SOURCES ${LOADER_SOURCES} ${AK_SOURCES} ${LIBC_SOURCES1} ${LIBC_SOURCES2} ${LIBC_SOURCES3} ${LIBSYSTEM_SOURCES})
if (("${SERENITY_ARCH}" STREQUAL "aarch64") OR ("${SERENITY_ARCH}" STREQUAL "riscv64"))
# On aarch64 and riscv64 the stack protector would be accessed before the Loader can relocate itself.
set_source_files_properties(main.cpp ../Libraries/LibELF/Relocation.cpp PROPERTIES COMPILE_FLAGS "-fno-stack-protector")
set_source_files_properties(main.cpp PROPERTIES COMPILE_FLAGS "-fno-stack-protector")
endif()
set_source_files_properties(../Libraries/LibC/ssp.cpp PROPERTIES COMPILE_FLAGS "-fno-stack-protector")
@ -58,7 +58,9 @@ elseif (CMAKE_CXX_COMPILER_ID MATCHES "Clang$")
target_link_libraries(Loader.so PRIVATE clang_rt.builtins)
endif ()
# Note: Don't confuse the coverage results by instrumenting Loader
target_link_libraries(Loader.so PRIVATE LibTimeZone NoCoverage)
target_link_libraries(Loader.so PRIVATE DynamicLoader_CompileOptions DynamicLoader_LibELF LibTimeZone)
target_link_options(Loader.so PRIVATE LINKER:--no-dynamic-linker)
# Don't confuse the coverage results by instrumenting Loader
target_link_libraries(Loader.so PRIVATE NoCoverage)
install(TARGETS Loader.so RUNTIME DESTINATION usr/lib/)

3
Userland/Libraries/LibELF/CMakeLists.txt
View file

@ -23,6 +23,9 @@ if (SERENITYOS)
Arch/aarch64/tls.S
)
endif()
add_library(DynamicLoader_LibELF STATIC ${SOURCES})
target_link_libraries(DynamicLoader_LibELF PUBLIC DynamicLoader_CompileOptions)
endif()
serenity_lib(LibELF elf ${SOURCES})