110 lines
3.5 KiB
Plaintext
110 lines
3.5 KiB
Plaintext
/*
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* SPDX-License-Identifier: MIT OR BlueOak-1.0.0
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* Copyright (c) 2018 Andre Richter <andre.o.richter@gmail.com>
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* Copyright (c) Berkus Decker <berkus+vesper@metta.systems>
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* Original code distributed under MIT, additional changes are under BlueOak-1.0.0
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*/
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__phys_load_addr = 0x80000;
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ENTRY(__phys_load_addr);
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PAGE_SIZE = 65536;
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/* Flags:
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* 4 == R
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* 5 == RX
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* 6 == RW
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*
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* Segments are marked PT_LOAD below so that the ELF file provides virtual and physical addresses.
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* It doesn't mean all of them need actually be loaded.
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*/
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PHDRS
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{
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segment_boot_core_stack PT_LOAD FLAGS(6);
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segment_code PT_LOAD FLAGS(5);
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segment_data PT_LOAD FLAGS(6);
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}
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/* Symbols between __BOOT_START and __BOOT_END should be dropped after init is complete.
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Symbols between __RO_START and __RO_END are the kernel code.
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Symbols between __BSS_START and __BSS_END must be initialized to zero by startup code in the kernel.
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*/
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SECTIONS
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{
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__STACK_START = __phys_load_addr; /* Stack grows from here towards 0x0. */
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. = __phys_load_addr; /* AArch64 boot address is 0x80000, 4K-aligned */
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/***********************************************************************************************
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* Code + RO Data
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***********************************************************************************************/
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.text :
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{
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/*******************************************************************************************
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* Boot Code + Boot Data
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*******************************************************************************************/
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__BOOT_START = .;
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KEEP(*(.text.main.entry))
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*(.text.boot)
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*(.data.boot)
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. = ALIGN(PAGE_SIZE); /* Here the boot code ends */
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__BOOT_END = .; // __BOOT_END must be PAGE_SIZE aligned
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/*******************************************************************************************
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* Regular Kernel Code
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*******************************************************************************************/
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__RO_START = .;
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*(.text*)
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} :segment_code
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.vectors :
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{
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. = ALIGN(2048);
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__EXCEPTION_VECTORS_START = .;
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KEEP(*(.vectors))
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} :segment_code
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.rodata :
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{
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. = ALIGN(4);
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*(.rodata*)
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FILL(0x00)
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. = ALIGN(PAGE_SIZE); /* Fill up to page size */
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__RO_END = .; /* __RO_END must be PAGE_SIZE aligned */
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} :segment_code
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/***********************************************************************************************
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* Data + BSS
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***********************************************************************************************/
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.data :
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{
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__DATA_START = .; /* __DATA_START must be PAGE_SIZE aligned */
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*(.data*)
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FILL(0x00)
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} :segment_data
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.bss (NOLOAD):
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{
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. = ALIGN(PAGE_SIZE);
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__BSS_START = .;
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*(.bss*)
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. = ALIGN(PAGE_SIZE); /* Align up to page size */
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__BSS_END = .;
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__BSS_SIZE_U64S = (__BSS_END - __BSS_START) / 8;
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} :segment_data
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/***********************************************************************************************
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* Misc
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***********************************************************************************************/
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.got : { *(.got*) }
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ASSERT(SIZEOF(.got) == 0, "Relocation support not expected")
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/DISCARD/ : { *(.comment*) *(.gnu*) *(.note*) *(.eh_frame*) *(.text.chainboot*) }
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}
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INCLUDE linker/aarch64-exceptions.ld
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