15e834a687
Fixes: #38591, #38207, #37861
The commit 65a2de84a9 aligned the data
linker symbol for sections and regions.
The data region symbol start has been placed outside the sections thus
being defined as the address of the region before alignment of the first
section in the data region, usually the `datas` section.
The symbol defining the start address of the data section is after
section alignment.
In most cases the address of the data region start and datas section
start will be identical, but not always.
The data region symbol is a new linker symbol and existing code has
been depending on the old data section start symbol.
Thus, the update to the use of the data region start symbol instead of
data ram start symbol thus results in a different address when the
section is aligned to a different address.
To ensure the original behavior in all cases, the data region start
address is now moved inside the data section.
Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>
260 lines
6.3 KiB
Plaintext
260 lines
6.3 KiB
Plaintext
/*
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* Copyright (c) 2020 Synopsys.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @brief Common parts of the linker scripts for the ARCv2 targets for
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* GNU and MWDT toolchains.
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*/
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#include <linker/sections.h>
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#include <linker/linker-defs.h>
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#include <linker/linker-tool.h>
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/* physical address of RAM */
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#ifdef CONFIG_HARVARD
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#define ROMABLE_REGION ICCM
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#define RAMABLE_REGION DCCM
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#else
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#if defined(CONFIG_XIP) && (FLASH_SIZE != 0)
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#define ROMABLE_REGION FLASH
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#define RAMABLE_REGION SRAM
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#else
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#define ROMABLE_REGION SRAM
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#define RAMABLE_REGION SRAM
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#endif
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#endif
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#ifdef CONFIG_ARC_MPU_ENABLE
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#if CONFIG_ARC_MPU_VER == 2
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#define MPU_MIN_SIZE 2048
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#elif (CONFIG_ARC_MPU_VER == 3) || (CONFIG_ARC_MPU_VER == 4) || (CONFIG_ARC_MPU_VER == 6)
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#define MPU_MIN_SIZE 32
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#endif
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#define MPU_MIN_SIZE_ALIGN . = ALIGN(MPU_MIN_SIZE);
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#if defined(CONFIG_MPU_REQUIRES_POWER_OF_TWO_ALIGNMENT)
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#define MPU_ALIGN(region_size) \
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. = ALIGN(MPU_MIN_SIZE); \
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. = ALIGN( 1 << LOG2CEIL(region_size))
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#else
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#define MPU_ALIGN(region_size) \
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. = ALIGN(MPU_MIN_SIZE)
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#endif
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#else
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#define MPU_MIN_SIZE_ALIGN
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#define MPU_ALIGN(region_size) . = ALIGN(4)
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#endif
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OUTPUT_ARCH(arc)
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ENTRY(CONFIG_KERNEL_ENTRY)
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MEMORY {
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#ifdef FLASH_START
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FLASH (rx) : ORIGIN = FLASH_START, LENGTH = FLASH_SIZE
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#endif
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#ifdef ICCM_START
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ICCM (rwx) : ORIGIN = ICCM_START, LENGTH = ICCM_SIZE
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#endif
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#ifdef SRAM_START
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SRAM (rwx) : ORIGIN = SRAM_START, LENGTH = SRAM_SIZE
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#endif
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#ifdef DCCM_START
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DCCM (rw) : ORIGIN = DCCM_START, LENGTH = DCCM_SIZE
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#endif
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/* Used by and documented in include/linker/intlist.ld */
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IDT_LIST (wx) : ORIGIN = 0xFFFFF7FF, LENGTH = 2K
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}
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SECTIONS {
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#include <linker/rel-sections.ld>
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GROUP_START(ROMABLE_REGION)
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SECTION_PROLOGUE(_TEXT_SECTION_NAME,,ALIGN(1024)) {
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__rom_region_start = .;
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__text_region_start = .;
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/* Located in generated directory. This file is populated by the
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* zephyr_linker_sources() Cmake function.
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*/
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#include <snippets-rom-start.ld>
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*(.text .text.*)
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*(.gnu.linkonce.t.*)
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. = ALIGN(4);
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#include <linker/kobject-text.ld>
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} GROUP_LINK_IN(ROMABLE_REGION)
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__text_region_end = .;
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__rodata_region_start = .;
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#include <linker/common-rom.ld>
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#include <linker/thread-local-storage.ld>
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SECTION_PROLOGUE(_RODATA_SECTION_NAME,,) {
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*(".rodata")
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*(".rodata.*")
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*(.gnu.linkonce.r.*)
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/* Located in generated directory. This file is populated by the
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* zephyr_linker_sources() Cmake function.
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*/
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#include <snippets-rodata.ld>
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#include <linker/kobject-rom.ld>
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#if defined(CONFIG_CPLUSPLUS) && !defined(CONFIG_CPP_STATIC_INIT_GNU) && defined(__MWDT_LINKER_CMD__)
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. = ALIGN(4);
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_fctors = .;
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KEEP(*(.ctors*))
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_ectors = .;
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#endif /* CONFIG_CPLUSPLUS && !CONFIG_CPP_STATIC_INIT_GNU && __MWDT_LINKER_CMD__ */
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} GROUP_LINK_IN(ROMABLE_REGION)
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#ifdef __MWDT_LINKER_CMD__
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/* TODO: add mwdt specific ROM C++ sections */
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#else
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#include <linker/cplusplus-rom.ld>
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#endif /* __MWDT_LINKER_CMD__ */
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__rodata_region_end = .;
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MPU_ALIGN(__rodata_region_end - __rom_region_start);
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__rom_region_end = .;
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__rom_region_size = __rom_region_end - __rom_region_start;
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GROUP_END(ROMABLE_REGION)
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GROUP_START(RAMABLE_REGION)
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#include <app_data_alignment.ld>
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/* Located in generated directory. This file is populated by the
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* zephyr_linker_sources() Cmake function.
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*/
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#include <snippets-ram-sections.ld>
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#if defined(CONFIG_USERSPACE)
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#define APP_SHARED_ALIGN MPU_MIN_SIZE_ALIGN
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#define SMEM_PARTITION_ALIGN MPU_ALIGN
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#include <app_smem.ld>
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_image_ram_start = _app_smem_start;
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_app_smem_size = _app_smem_end - _app_smem_start;
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_app_smem_rom_start = LOADADDR(_APP_SMEM_SECTION_NAME);
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#endif /* CONFIG_USERSPACE */
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SECTION_DATA_PROLOGUE(_BSS_SECTION_NAME,(NOLOAD),) {
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MPU_MIN_SIZE_ALIGN
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/*
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* For performance, BSS section is assumed to be 4 byte aligned and
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* a multiple of 4 bytes
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*/
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. = ALIGN(4);
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__bss_start = .;
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_image_ram_start = .;
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__kernel_ram_start = .;
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*(".bss")
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*(".bss.*")
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*(COMMON)
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*(".kernel_bss.*")
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/*
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* BSP clears this memory in words only and doesn't clear any
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* potential left over bytes.
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*/
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__bss_end = ALIGN(4);
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} GROUP_DATA_LINK_IN(RAMABLE_REGION, RAMABLE_REGION)
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#include <linker/common-noinit.ld>
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GROUP_START(DATA_REGION)
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SECTION_DATA_PROLOGUE(_DATA_SECTION_NAME,,) {
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/* when XIP, .text is in ROM, but vector table must be at start of .data */
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__data_region_start = .;
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__data_start = .;
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*(".data")
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*(".data.*")
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*(".kernel.*")
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/* Located in generated directory. This file is populated by the
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* zephyr_linker_sources() Cmake function.
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*/
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#include <snippets-rwdata.ld>
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__data_end = .;
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} GROUP_DATA_LINK_IN(RAMABLE_REGION, ROMABLE_REGION)
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__data_size = __data_end - __data_start;
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__data_load_start = LOADADDR(_DATA_SECTION_NAME);
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__data_region_load_start = LOADADDR(_DATA_SECTION_NAME);
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#include <linker/common-ram.ld>
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#include <linker/kobject-data.ld>
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#ifdef __MWDT_LINKER_CMD__
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/* TODO: add mwdt specific RAM C++ sections */
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#else
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#include <linker/cplusplus-ram.ld>
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#endif /* __MWDT_LINKER_CMD__ */
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/* Located in generated directory. This file is populated by the
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* zephyr_linker_sources() Cmake function.
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*/
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#include <snippets-data-sections.ld>
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__data_region_end = .;
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MPU_MIN_SIZE_ALIGN
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/* Define linker symbols */
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_image_ram_end = .;
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_end = .; /* end of image */
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__kernel_ram_end = .;
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__kernel_ram_size = __kernel_ram_end - __kernel_ram_start;
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#ifdef __MWDT_LINKER_CMD__
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/* mwdt requires _fstack, _estack which will be used in _stkchk.
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* _stkchk is inserted by mwdt automatically, if _fstack, _estack is not
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* set correctly, the brk_s instruction will be called
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* here, we use a trick to deceive the compiler.
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*/
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_fstack = _image_ram_start;
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_estack = .;
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#endif /* __MWDT_LINKER_CMD__ */
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GROUP_END(RAMABLE_REGION)
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/* Located in generated directory. This file is populated by the
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* zephyr_linker_sources() Cmake function.
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*/
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#include <snippets-sections.ld>
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#include <linker/debug-sections.ld>
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SECTION_PROLOGUE(.ARC.attributes, 0,) {
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KEEP(*(.ARC.attributes))
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KEEP(*(.gnu.attributes))
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}
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/DISCARD/ : {
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#if defined(CONFIG_CPLUSPLUS) && !defined(CONFIG_CPP_STATIC_INIT_GNU) && defined(__MWDT_LINKER_CMD__)
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*(.dtors*)
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*(.fini*)
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*(.eh_frame*)
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#endif /* CONFIG_CPLUSPLUS && !CONFIG_CPP_STATIC_INIT_GNU && __MWDT_LINKER_CMD__ */
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*(.note.GNU-stack)
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*(.got.plt)
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*(.igot.plt)
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*(.got)
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*(.igot)
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}
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}
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