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Kernel: Set kernel stack alignment to 8-bytes

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This is already assumed by most of the assembly in the kernel, setting
this is just making it explicit (and may save some stack).
This commit is contained in:
MacDue 2023-06-15 23:05:09 +01:00 committed by Jelle Raaijmakers
parent 130ec7e5b4
commit 063efe9cf8
Notes: sideshowbarker 2024-07-18 22:57:59 +09:00 
Author: https://github.com/MacDue
Commit: https://github.com/SerenityOS/serenity/commit/063efe9cf8
Pull-request: https://github.com/SerenityOS/serenity/pull/19412
Reviewed-by: https://github.com/Hendiadyoin1 ✅
Reviewed-by: https://github.com/gmta ✅
1 changed files with 6 additions and 1 deletions
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7
Kernel/CMakeLists.txt
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@ -700,10 +700,15 @@ if (NOT "${SERENITY_ARCH}" STREQUAL "aarch64")
COMMENT "Preprocessing linker.ld"
VERBATIM
)
add_custom_target(generate_kernel_linker_script DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/linker.ld)
target_link_options(Kernel PRIVATE LINKER:-T ${CMAKE_CURRENT_BINARY_DIR}/linker.ld -nostdlib -nodefaultlibs)
set_target_properties(Kernel PROPERTIES LINK_DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/linker.ld")
if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
target_compile_options(Kernel PRIVATE -mpreferred-stack-boundary=3)
elseif(CMAKE_CXX_COMPILER_ID MATCHES "Clang$")
target_compile_options(Kernel PRIVATE -mstack-alignment=8)
endif()
else()
target_link_options(Kernel PRIVATE LINKER:-T ${CMAKE_CURRENT_SOURCE_DIR}/Arch/aarch64/linker.ld -nostdlib LINKER:--no-pie)
set_target_properties(Kernel PROPERTIES LINK_DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/Arch/aarch64/linker.ld)