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Kernel: Use a different kernel load address for x86_64

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Co-authored-by: Gunnar Beutner <gbeutner@serenityos.org>
This commit is contained in:
Liav A 2021-07-18 03:35:26 +02:00 • committed by Andreas Kling
parent 7e94b090fe
commit 5938d882d8
Notes: sideshowbarker 2024-07-18 08:48:14 +09:00
3 changed files with 95 additions and 18 deletions
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6
Kernel/CMakeLists.txt
View file

@ -356,9 +356,11 @@ endif()
if ("${SERENITY_ARCH}" STREQUAL "x86_64")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mcmodel=large -fno-pic -mno-red-zone")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -faligned-new=8")
set(KERNEL_LINKER_SCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/linker_amd64.ld)
else()
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pie -fPIE")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -faligned-new=4")
set(KERNEL_LINKER_SCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/linker_i386.ld)
endif()
# Kernel Undefined Behavior Sanitizer (KUBSAN)
@ -394,8 +396,8 @@ endif()
add_executable(Kernel ${SOURCES})
add_dependencies(Kernel generate_EscapeSequenceStateMachine.h)
target_link_options(Kernel PRIVATE LINKER:-T ${CMAKE_CURRENT_SOURCE_DIR}/linker.ld -nostdlib)
set_target_properties(Kernel PROPERTIES LINK_DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/linker.ld)
target_link_options(Kernel PRIVATE LINKER:-T ${KERNEL_LINKER_SCRIPT} -nostdlib)
set_target_properties(Kernel PROPERTIES LINK_DEPENDS ${KERNEL_LINKER_SCRIPT})
if (ENABLE_KERNEL_LTO)
include(CheckIPOSupported)

90
Kernel/linker_amd64.ld Normal file
View file

@ -0,0 +1,90 @@
ENTRY(init)
KERNEL_VIRTUAL_BASE = 0x2000000000;
PHDRS
{
text PT_LOAD ;
data PT_LOAD ;
bss PT_LOAD ;
ksyms PT_LOAD ;
}
SECTIONS
{
. = KERNEL_VIRTUAL_BASE + 0x00200000;
start_of_kernel_image = .;
.text ALIGN(4K) : AT (ADDR(.text) - KERNEL_VIRTUAL_BASE)
{
start_of_kernel_text = .;
start_of_safemem_text = .;
KEEP(*(.text.safemem))
end_of_safemem_text = .;
start_of_safemem_atomic_text = .;
KEEP(*(.text.safemem.atomic))
end_of_safemem_atomic_text = .;
*(.text*)
} :text
.unmap_after_init ALIGN(4K) : AT (ADDR(.unmap_after_init) - KERNEL_VIRTUAL_BASE)
{
start_of_unmap_after_init = .;
*(.unmap_after_init*);
end_of_unmap_after_init = .;
end_of_kernel_text = .;
} :text
.rodata ALIGN(4K) : AT (ADDR(.rodata) - KERNEL_VIRTUAL_BASE)
{
start_heap_ctors = .;
*libkernel_heap.a:*(.ctors)
end_heap_ctors = .;
start_ctors = .;
*(.ctors)
end_ctors = .;
*(.rodata*)
} :data
.data ALIGN(4K) : AT (ADDR(.data) - KERNEL_VIRTUAL_BASE)
{
start_of_kernel_data = .;
*(.data*)
end_of_kernel_data = .;
} :data
.ro_after_init ALIGN(4K) (NOLOAD) : AT(ADDR(.ro_after_init) - KERNEL_VIRTUAL_BASE)
{
start_of_ro_after_init = .;
*(.ro_after_init);
end_of_ro_after_init = .;
} :data
.bss ALIGN(4K) (NOLOAD) : AT (ADDR(.bss) - KERNEL_VIRTUAL_BASE)
{
start_of_kernel_bss = .;
*(page_tables)
*(COMMON)
*(.bss)
end_of_kernel_bss = .;
. = ALIGN(4K);
*(.heap)
} :bss
.ksyms ALIGN(4K) : AT (ADDR(.ksyms) - KERNEL_VIRTUAL_BASE)
{
start_of_kernel_ksyms = .;
*(.kernel_symbols)
end_of_kernel_ksyms = .;
} :ksyms
end_of_kernel_image = .;
}

17
Kernel/linker.ld → Kernel/linker_i386.ld
View file

@ -4,8 +4,6 @@ KERNEL_VIRTUAL_BASE = 0xc0000000;
PHDRS
{
boot_text PT_LOAD ;
boot_bss PT_LOAD ;
text PT_LOAD ;
data PT_LOAD ;
bss PT_LOAD ;
@ -14,23 +12,10 @@ PHDRS
SECTIONS
{
. = KERNEL_VIRTUAL_BASE + 0x00100000;
. = KERNEL_VIRTUAL_BASE + 0x00200000;
start_of_kernel_image = .;
.boot_text ALIGN(4K) : AT (ADDR(.boot_text) - KERNEL_VIRTUAL_BASE)
{
KEEP(*(.boot_text))
KEEP(*(.multiboot))
} :boot_text
.boot_bss ALIGN(4K) (NOLOAD) : AT (ADDR(.boot_bss) - KERNEL_VIRTUAL_BASE)
{
KEEP(*(.page_tables))
KEEP(*(.stack))
*(.super_pages)
} :boot_bss
.text ALIGN(4K) : AT (ADDR(.text) - KERNEL_VIRTUAL_BASE)
{
start_of_kernel_text = .;