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Kernel/aarch64: Disable stack protector + sanitizers for MMU-less files

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Compile source files that run early in the boot process without the MMU
enabled, without stack protector and sanitizers. Enabling them will
cause the compiler to insert accesses to global variables, such as
__stack_chk_guard, which cause the CPU to crash, because these variables
are linked at high virtual addresses, which the CPU cannot access
without the MMU enabled.
This commit is contained in:
Timon Kruiper 2023-01-06 16:15:32 +01:00 • committed by Linus Groh
parent ebdb899d3d
commit fdc687a911
1 changed files with 10 additions and 3 deletions
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13
Kernel/CMakeLists.txt
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@ -442,9 +442,15 @@ elseif("${SERENITY_ARCH}" STREQUAL "aarch64")
Arch/aarch64/RPi/Timer.cpp
Arch/aarch64/RPi/UART.cpp
)
set(SOURCES_RUNNING_WITHOUT_MMU
Arch/aarch64/Exceptions.cpp
Arch/aarch64/MMU.cpp
Arch/aarch64/pre_init.cpp
)
set(KERNEL_SOURCES
${KERNEL_SOURCES}
${RPI_SOURCES}
${SOURCES_RUNNING_WITHOUT_MMU}
Arch/Processor.cpp
Arch/aarch64/boot.S
@ -453,16 +459,13 @@ elseif("${SERENITY_ARCH}" STREQUAL "aarch64")
Arch/aarch64/CrashHandler.cpp
Arch/aarch64/CurrentTime.cpp
Arch/aarch64/Dummy.cpp
Arch/aarch64/Exceptions.cpp
Arch/aarch64/init.cpp
Arch/aarch64/InterruptManagement.cpp
Arch/aarch64/Interrupts.cpp
Arch/aarch64/kprintf.cpp
Arch/aarch64/MainIdRegister.cpp
Arch/aarch64/MMU.cpp
Arch/aarch64/PageDirectory.cpp
Arch/aarch64/Panic.cpp
Arch/aarch64/pre_init.cpp
Arch/aarch64/Processor.cpp
Arch/aarch64/SafeMem.cpp
Arch/aarch64/SmapDisabler.cpp
@ -474,6 +477,10 @@ elseif("${SERENITY_ARCH}" STREQUAL "aarch64")
# FIXME: Remove this once compiling MemoryManager.cpp doesn't give the nonnull error anymore.
add_compile_options(-Wno-nonnull)
# NOTE: These files cannot use a stack protector and sanitizers, as these will cause accesses to global variables to be inserted
# by the compiler. The CPU cannot access global variables without the MMU as the kernel is linked for a virtual address in high memory.
set_source_files_properties(${SOURCES_RUNNING_WITHOUT_MMU} PROPERTIES COMPILE_FLAGS "-fno-stack-protector -fno-sanitize=all")
endif()
set(AK_SOURCES