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Kernel/x86: Bake the Prekernel and the Kernel into one image
The new baked image is a Prekernel and a Kernel baked together now, so essentially we no longer need to pass the Prekernel as -kernel and the actual kernel image as -initrd to QEMU, leaving the option to pass an actual initrd or initramfs module later on with multiboot.
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897c4e5145
10 changed files with 81 additions and 50 deletions
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@ -720,7 +720,25 @@ elseif(CMAKE_CXX_COMPILER_ID MATCHES "Clang$")
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target_link_libraries(Kernel PRIVATE kernel_heap clang_rt.builtins)
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endif()
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add_custom_command(
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if ("${SERENITY_ARCH}" STREQUAL "x86_64")
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set(KERNEL_ELF_OBJCOPY_TARGET "elf64-x86-64")
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endif()
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# In x86_64 the Kernel is linked to the Pre-kernel binary.
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if ("${SERENITY_ARCH}" STREQUAL "x86_64")
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add_custom_command(
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TARGET Kernel POST_BUILD
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COMMAND ${CMAKE_COMMAND} -E env NM=${CMAKE_NM} sh ${CMAKE_CURRENT_SOURCE_DIR}/mkmap.sh
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COMMAND ${CMAKE_COMMAND} -E env OBJCOPY=${CMAKE_OBJCOPY} sh ${CMAKE_CURRENT_SOURCE_DIR}/embedmap.sh
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COMMAND ${CMAKE_OBJCOPY} --only-keep-debug Kernel Kernel.debug
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COMMAND ${CMAKE_OBJCOPY} --strip-debug Kernel
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COMMAND ${CMAKE_OBJCOPY} --add-gnu-debuglink=Kernel.debug Kernel
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COMMAND ${CMAKE_OBJCOPY} --set-section-flags .heap=load Kernel Kernel_shared_object
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COMMAND ${CMAKE_OBJCOPY} -I binary -O ${KERNEL_ELF_OBJCOPY_TARGET} --rename-section .data=.Kernel_image --set-section-alignment .Kernel_image=4096 Kernel_shared_object Kernel.o
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BYPRODUCTS ${CMAKE_CURRENT_BINARY_DIR}/Kernel.o ${CMAKE_CURRENT_BINARY_DIR}/kernel.map
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)
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elseif ("${SERENITY_ARCH}" STREQUAL "aarch64")
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add_custom_command(
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TARGET Kernel POST_BUILD
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COMMAND "${CMAKE_COMMAND}" -E env NM=${CMAKE_NM} sh ${CMAKE_CURRENT_SOURCE_DIR}/mkmap.sh
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COMMAND "${CMAKE_COMMAND}" -E env OBJCOPY=${CMAKE_OBJCOPY} sh ${CMAKE_CURRENT_SOURCE_DIR}/embedmap.sh
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@ -728,9 +746,14 @@ add_custom_command(
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COMMAND ${CMAKE_OBJCOPY} --strip-debug Kernel
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COMMAND ${CMAKE_OBJCOPY} --add-gnu-debuglink=Kernel.debug Kernel
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BYPRODUCTS ${CMAKE_CURRENT_BINARY_DIR}/kernel.map
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)
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)
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endif()
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# Both architectures (x86_64, aarch64) share the same location in their respective architecture build folder.
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# In x86_64 the Kernel is linked to the Pre-kernel binary and then generates the result Kernel binary.
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# In aarch64 there's no Pre-kernel stage yet, so we immediately get a Kernel binary.
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install(FILES "${CMAKE_CURRENT_BINARY_DIR}/Kernel" DESTINATION boot)
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install(FILES "${CMAKE_CURRENT_BINARY_DIR}/Kernel.debug" DESTINATION boot)
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install(FILES "${CMAKE_CURRENT_BINARY_DIR}/kernel.map" DESTINATION res)
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