mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 10:22:45 +00:00
7e94b090fe
This implements a simple bootloader that is capable of loading ELF64 kernel images. It does this by using QEMU/GRUB to load the kernel image from disk and pass it to our bootloader as a Multiboot module. The bootloader then parses the ELF image and sets it up appropriately. The kernel's entry point is a C++ function with architecture-native code. Co-authored-by: Liav A <liavalb@gmail.com>
28 lines
874 B
CMake
28 lines
874 B
CMake
set(SOURCES
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boot.S
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multiboot.S
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init.cpp
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UBSanitizer.cpp
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../MiniStdLib.cpp
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)
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if ("${SERENITY_ARCH}" STREQUAL "i686")
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set(PREKERNEL_TARGET Prekernel32)
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else()
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set(PREKERNEL_TARGET Prekernel64)
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endif()
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add_executable(${PREKERNEL_TARGET} ${SOURCES})
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target_link_options(${PREKERNEL_TARGET} PRIVATE LINKER:-T ${CMAKE_CURRENT_SOURCE_DIR}/linker.ld -nostdlib)
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set_target_properties(${PREKERNEL_TARGET} PROPERTIES LINK_DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/linker.ld)
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target_link_libraries(${PREKERNEL_TARGET} gcc supc++)
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add_custom_command(
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TARGET ${PREKERNEL_TARGET} POST_BUILD
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COMMAND ${TOOLCHAIN_PREFIX}objcopy -O elf32-i386 ${CMAKE_CURRENT_BINARY_DIR}/${PREKERNEL_TARGET} ${CMAKE_CURRENT_BINARY_DIR}/Prekernel
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BYPRODUCTS ${CMAKE_CURRENT_BINARY_DIR}/Prekernel
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)
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install(FILES "${CMAKE_CURRENT_BINARY_DIR}/Prekernel" DESTINATION boot)
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