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Meta: Enable RELR relocations

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Also add a check to serenity.sh to ensure that the toolchain is new
enough for this feature to work.
This commit is contained in:
Daniel Bertalan 2022-02-05 15:48:32 +01:00 committed by Andreas Kling
parent 7ab6816b49
commit ba5bbde7ee
Notes: sideshowbarker 2024-07-17 19:01:09 +09:00 
Author: https://github.com/BertalanD
Commit: https://github.com/SerenityOS/serenity/commit/ba5bbde7ee
Pull-request: https://github.com/SerenityOS/serenity/pull/12425
Reviewed-by: https://github.com/ADKaster
Reviewed-by: https://github.com/alimpfard
3 changed files with 25 additions and 1 deletions
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7
CMakeLists.txt
View File

@ -274,6 +274,13 @@ if(NOT "${SERENITY_ARCH}" STREQUAL "aarch64")
if (ENABLE_MOLD_LINKER)
add_link_options(-fuse-ld=mold)
endif()
if (CMAKE_CXX_COMPILER_ID MATCHES "Clang$" OR USE_MOLD_LINKER)
add_link_options(LINKER:--pack-dyn-relocs=relr)
else()
add_link_options(LINKER:-z,pack-relative-relocs)
endif()
add_subdirectory(Userland)
add_subdirectory(Tests)
endif()

4
Kernel/CMakeLists.txt
View File

@ -422,6 +422,8 @@ if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
link_directories(${TOOLCHAIN_ROOT}/lib/gcc/${SERENITY_ARCH}-pc-serenity/${GCC_VERSION}/)
set(TARGET_STRING "")
add_link_options(LINKER:-z,pack-relative-relocs)
else() # Assume Clang
add_compile_options(-Waddress-of-packed-member)
add_compile_options(-faligned-allocation)
@ -429,7 +431,7 @@ else() # Assume Clang
# We need this in order to pick up the #define __serenity__, otherwise we end up including unistd.h into the linker script
set(TARGET_STRING "--target=${CMAKE_CXX_COMPILER_TARGET}")
add_link_options(LINKER:--build-id=none)
add_link_options(LINKER:--build-id=none LINKER:--pack-dyn-relocs=relr)
endif()
macro (set_new_alignment alignment)

15
Meta/serenity.sh
View File

@ -242,6 +242,21 @@ build_toolchain() {
ensure_toolchain() {
[ -d "$TOOLCHAIN_DIR" ] || build_toolchain
# FIXME: Remove this check when most people have already updated their toolchain
if [ "$TOOLCHAIN_TYPE" = "GNU" ]; then
local ld_version
ld_version="$("$TOOLCHAIN_DIR"/bin/"$TARGET"-pc-serenity-ld -v)"
local expected_version="GNU ld (GNU Binutils) 2.38"
if [ "$ld_version" != "$expected_version" ]; then
echo "Your toolchain has an old version of binutils installed."
echo " installed version: \"$ld_version\""
echo " expected version: \"$expected_version\""
echo "Please run $ARG0 rebuild-toolchain $TARGET to update it."
exit 1
fi
fi
}
delete_toolchain() {