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Kernel: Support loading the kernel at almost arbitrary virtual addresses

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This enables further work on implementing KASLR by adding relocation
support to the pre-kernel and updating the kernel to be less dependent
on specific virtual memory layouts.
This commit is contained in:
Gunnar Beutner 2021-07-26 15:10:51 +02:00 • committed by Andreas Kling
parent e3d2ca6bd2
commit 57417a3d6e
20 changed files with 123 additions and 87 deletions
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6
Kernel/CMakeLists.txt
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@ -16,8 +16,6 @@ set(KERNEL_HEAP_SOURCES
Heap/kmalloc.cpp
)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS_STATIC}")
set(KERNEL_SOURCES
ACPI/DynamicParser.cpp
ACPI/Initialize.cpp
@ -350,7 +348,7 @@ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mno-80387 -mno-mmx -mno-sse -mno-sse2")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-asynchronous-unwind-tables")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fstack-protector-strong")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-exceptions")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -nostdlib -nostdinc -nostdinc++")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -nodefaultlibs -nostdlib -nostdinc -nostdinc++")
# Apply any flags that are only available on >= GCC 11.1
if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 11.1)
@ -365,7 +363,7 @@ else()
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -faligned-new=4")
endif()
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pie -Wl,--no-dynamic-linker")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -static-pie")
# Kernel Coverage (KCOV) is an API to collect and expose program counters of
# kernel code that has been run to user space. It's rather slow and likely not