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serenity/Kernel/Arch/riscv64/linker.ld
Sönke Holz 8e5f201e59 Kernel/riscv64: Add .{ro,unmap}_after_init sections to linker script
`MM.protect_kernel_image` would otherwise make the contents of these
sections read-only, as they were for some reason placed before `.data`
and after the start of `.text`.
2023-12-08 12:36:38 -07:00

113 lines
2.1 KiB
Text

/*
* 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*)
} :text
.driver_init ALIGN(4K) : AT (ADDR(.driver_init))
{
driver_init_table_start = .;
*(.driver_init)
driver_init_table_end = .;
} :text
.unmap_after_init ALIGN(4K) :
{
start_of_unmap_after_init = .;
*(.unmap_after_init*);
end_of_unmap_after_init = .;
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 = .;
*(.srodata* .rodata*)
} :data
.data ALIGN(4K) :
{
start_of_kernel_data = .;
*(.sdata* .data*)
end_of_kernel_data = .;
} :data
.ro_after_init ALIGN(4K) :
{
start_of_ro_after_init = .;
*(.ro_after_init);
end_of_ro_after_init = .;
} :data
.ksyms ALIGN(4K) :
{
start_of_kernel_ksyms = .;
*(.kernel_symbols)
end_of_kernel_ksyms = .;
} :ksyms
.bss ALIGN(4K) (NOLOAD) :
{
start_of_bss = .;
*(.sbss* .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.
*/
. = ALIGN(4K);
page_tables_phys_start = .;
. += 8M;
page_tables_phys_end = .;
end_of_kernel_image = .;
}