include/arch/mips/linker.ld

/*
 * Copyright (c) 2020, 2021 Antony Pavlov <antonynpavlov@gmail.com>
 *
 * based on include/arch/sparc/linker.ld
 *
 * SPDX-License-Identifier: Apache-2.0
 */

/**
 * @file
 * @brief Linker command/script file for the MIPS platform
 */

#include <linker/sections.h>
#include <linker/linker-defs.h>
#include <linker/linker-tool.h>

#define ROMABLE_REGION              RAM
#define RAMABLE_REGION              RAM

#define _VECTOR_SECTION_NAME        vector
#define _EXCEPTION_SECTION_NAME     exceptions
#define _RESET_SECTION_NAME         reset

MEMORY
{
    RAM (rwx) : ORIGIN = CONFIG_SRAM_BASE_ADDRESS, LENGTH = KB(CONFIG_SRAM_SIZE)
    /* Used by and documented in include/linker/intlist.ld */
    IDT_LIST  (wx)      : ORIGIN = 0xFFFFF7FF, LENGTH = 2K
}

REGION_ALIAS("REGION_TEXT", RAM);
REGION_ALIAS("REGION_RODATA", RAM);
REGION_ALIAS("REGION_DATA_VMA", RAM);
REGION_ALIAS("REGION_DATA_LMA", RAM);
REGION_ALIAS("REGION_BSS", RAM);

ENTRY(CONFIG_KERNEL_ENTRY)

PROVIDE (__memory_base = CONFIG_SRAM_BASE_ADDRESS);
PROVIDE (__memory_size = CONFIG_SRAM_SIZE * 1024);
PROVIDE (__stack = CONFIG_SRAM_BASE_ADDRESS + (CONFIG_SRAM_SIZE - 1) * 1024);

SECTIONS
{

#include <linker/rel-sections.ld>

    SECTION_PROLOGUE(_VECTOR_SECTION_NAME,,)
    {
		. = ALIGN(0x1000);
		KEEP(*(.vectors.*))
    } GROUP_LINK_IN(ROMABLE_REGION)

    SECTION_PROLOGUE(_RESET_SECTION_NAME,,)
    {
		. = ALIGN(0x10);
		KEEP(*(.reset.*))
    } GROUP_LINK_IN(ROMABLE_REGION)

    SECTION_PROLOGUE(_EXCEPTION_SECTION_NAME,,)
    {
		. = ALIGN(0x10);
		 KEEP(*(".exception.entry.*"))
		 *(".exception.other.*")
    } GROUP_LINK_IN(ROMABLE_REGION)

    SECTION_PROLOGUE(_TEXT_SECTION_NAME,,)
	{
		. = ALIGN(4);

		*(.text)
		*(".text.*")
	} GROUP_LINK_IN(REGION_TEXT)

    __rodata_region_start = .;
#include <linker/common-rom.ld>
#include <linker/thread-local-storage.ld>

    SECTION_PROLOGUE(_RODATA_SECTION_NAME,,)
	{
		 . = ALIGN(8);
		 *(.rodata)
		 *(.rodata.*)
		 *(.gnu.linkonce.r.*)
		 *(.rodata1)

/* Located in generated directory. This file is populated by the
 * zephyr_linker_sources() Cmake function.
 */
#include <snippets-rodata.ld>

	} GROUP_LINK_IN(REGION_RODATA)

#include <linker/cplusplus-rom.ld>
    __rodata_region_end = .;

    SECTION_PROLOGUE(.plt,,)
	{
		*(.plt)
	}

    SECTION_PROLOGUE(.iplt,,)
	{
		*(.iplt)
	}

    SECTION_DATA_PROLOGUE(_DATA_SECTION_NAME,,)
	{
		 . = ALIGN(8);
		 _image_ram_start = .;
		 __data_ram_start = .;

		 *(.data)
		 *(.data.*)
		 *(.gnu.linkonce.d.*)
		 *(.sdata)
		 *(.sdata.*)
		 . = ALIGN(8);
		SORT(CONSTRUCTORS)

/* Located in generated directory. This file is populated by the
 * zephyr_linker_sources() Cmake function.
 */
#include <snippets-rwdata.ld>

	} GROUP_DATA_LINK_IN(REGION_DATA_VMA, REGION_DATA_LMA)

#include <linker/common-ram.ld>

/* Located in generated directory. This file is populated by the
 * zephyr_linker_sources() Cmake function.
 */
#include <snippets-ram-sections.ld>

/* Located in generated directory. This file is populated by the
 * zephyr_linker_sources() Cmake function.
 */
#include <snippets-data-sections.ld>

    __data_ram_end = .;

    SECTION_DATA_PROLOGUE(_BSS_SECTION_NAME,(NOLOAD),)
	{
		/*
		 * For performance, BSS section is assumed to be 4 byte aligned and
		 * a multiple of 4 bytes
		 */
		 . = ALIGN(4);
		 __bss_start = .;
		 *(.dynbss)
		 *(.sbss)
		 *(.sbss.*)
		 *(.bss)
		 *(.bss.*)
		 *(.gnu.linkonce.b.*)
		 *(.scommon)
		 COMMON_SYMBOLS
		 /*
		  * As memory is cleared in words only, it is simpler to ensure the BSS
		  * section ends on a 4 byte boundary. This wastes a maximum of 3 bytes.
		  */
		  __bss_end = ALIGN(4);
	}  GROUP_LINK_IN(REGION_BSS)

    SECTION_PROLOGUE(_NOINIT_SECTION_NAME,(NOLOAD),)
	{
		/*
		 * This section is used for non-initialized objects that
		 * will not be cleared during the boot process.
		 */
		 *(.noinit)
		 *(.noinit.*)

/* Located in generated directory. This file is populated by the
 * zephyr_linker_sources() Cmake function.
 */
#include <snippets-noinit.ld>

	} GROUP_LINK_IN(REGION_BSS)

#include <linker/cplusplus-ram.ld>

     _image_ram_end = .;
     _end = .; /* end of image */

/* Located in generated directory. This file is populated by the
 * zephyr_linker_sources() Cmake function.
 */
#include <snippets-sections.ld>

#include <linker/debug-sections.ld>

	.mdebug.abi32 : {
		KEEP(*(.mdebug.abi32))
	}

    SECTION_PROLOGUE(.gnu.attributes, 0,)
	{
		KEEP(*(.gnu.attributes))
	}

	/DISCARD/ : {
		*(.MIPS.abiflags)
		*(.pdr)
		*(.reginfo)
	}
}