From fdc687a91165018f4c0cdd50a60ec39519bd3444 Mon Sep 17 00:00:00 2001
From: Timon Kruiper <timonkruiper@gmail.com>
Date: Fri, 6 Jan 2023 16:15:32 +0100
Subject: [PATCH] Kernel/aarch64: Disable stack protector + sanitizers for
 MMU-less files

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.
---
 Kernel/CMakeLists.txt | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/Kernel/CMakeLists.txt b/Kernel/CMakeLists.txt
index a6f70f5656..9be5981832 100644
--- a/Kernel/CMakeLists.txt
+++ b/Kernel/CMakeLists.txt
@@ -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