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Kernel: Add linker script for riscv64

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Sönke Holz 2023-08-18 18:39:53 +02:00 committed by Andrew Kaster
parent a2f0804f22
commit 132d25e5bf
Notes: sideshowbarker 2024-07-17 07:16:27 +09:00 
Author: https://github.com/spholz
Commit: https://github.com/SerenityOS/serenity/commit/132d25e5bf
Pull-request: https://github.com/SerenityOS/serenity/pull/20623
Reviewed-by: https://github.com/kleinesfilmroellchen ✅
2 changed files with 104 additions and 4 deletions
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97
Kernel/Arch/riscv64/linker.ld Normal file
View File

@ -0,0 +1,97 @@
/*
* Copyright (c) 2023, Sönke Holz <sholz830@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
ENTRY(start)
KERNEL_MAPPING_BASE = 0x2000000000;
/* TODO: Add FLAGS to the program headers */
PHDRS
{
text PT_LOAD ;
data PT_LOAD ;
ksyms PT_LOAD ;
bss PT_LOAD ;
}
SECTIONS
{
. = KERNEL_MAPPING_BASE;
start_of_kernel_image = .;
.text ALIGN(4K) :
{
start_of_kernel_text = .;
*(.text.first)
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*)
end_of_kernel_text = .;
} :text
.rodata ALIGN(4K) :
{
start_heap_ctors = .;
*libkernel_heap.a:*(.init_array)
end_heap_ctors = .;
start_ctors = .;
*(.init_array)
end_ctors = .;
*(.rodata*)
} :data
.data ALIGN(4K) :
{
start_of_kernel_data = .;
*(.data*)
end_of_kernel_data = .;
} :data
.ksyms ALIGN(4K) :
{
start_of_kernel_ksyms = .;
*(.kernel_symbols)
end_of_kernel_ksyms = .;
} :ksyms
.bss ALIGN(4K) (NOLOAD) :
{
start_of_bss = .;
*(.bss)
end_of_bss = .;
. = ALIGN(4K);
*(.heap)
} :bss
/*
FIXME: 8MB is enough space for all of the tables required to identity map
physical memory. 8M is wasteful, so this should be properly calculated.
*/
/* FIXME: Placeholder to satisfy linker */
start_of_unmap_after_init = .;
end_of_unmap_after_init = .;
start_of_ro_after_init = .;
end_of_ro_after_init = .;
. = ALIGN(4K);
page_tables_phys_start = .;
. += 8M;
page_tables_phys_end = .;
end_of_kernel_image = .;
}

11
Kernel/CMakeLists.txt
View File

@ -713,7 +713,13 @@ add_dependencies(kernel_heap install_libc_headers)
add_executable(Kernel ${SOURCES})
add_dependencies(Kernel generate_EscapeSequenceStateMachine.h generate_version_header install_libc_headers)
if (NOT "${SERENITY_ARCH}" STREQUAL "aarch64")
if("${SERENITY_ARCH}" STREQUAL "aarch64")
target_link_options(Kernel PRIVATE LINKER:-T ${CMAKE_CURRENT_SOURCE_DIR}/Arch/aarch64/linker.ld -nostdlib LINKER:--no-pie)
set_target_properties(Kernel PROPERTIES LINK_DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/Arch/aarch64/linker.ld)
elseif("${SERENITY_ARCH}" STREQUAL "riscv64")
target_link_options(Kernel PRIVATE LINKER:-T ${CMAKE_CURRENT_SOURCE_DIR}/Arch/riscv64/linker.ld -nostdlib LINKER:--no-pie)
set_target_properties(Kernel PROPERTIES LINK_DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/Arch/riscv64/linker.ld)
elseif ("${SERENITY_ARCH}" STREQUAL "x86_64")
add_custom_command(
OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/linker.ld
COMMAND "${CMAKE_CXX_COMPILER}" ${TARGET_STRING} -E -P -x c -I${CMAKE_CURRENT_SOURCE_DIR}/.. "${CMAKE_CURRENT_SOURCE_DIR}/Arch/x86_64/linker.ld" -o "${CMAKE_CURRENT_BINARY_DIR}/linker.ld"
@ -730,9 +736,6 @@ if (NOT "${SERENITY_ARCH}" STREQUAL "aarch64")
elseif(CMAKE_CXX_COMPILER_ID MATCHES "Clang$")
target_compile_options(Kernel PRIVATE -mstack-alignment=8)
endif()
else()
target_link_options(Kernel PRIVATE LINKER:-T ${CMAKE_CURRENT_SOURCE_DIR}/Arch/aarch64/linker.ld -nostdlib LINKER:--no-pie)
set_target_properties(Kernel PROPERTIES LINK_DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/Arch/aarch64/linker.ld)
endif()
if (ENABLE_KERNEL_LTO)