323 lines
10 KiB
C
323 lines
10 KiB
C
/*
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* Copyright (c) 2013-2014, Wind River Systems, Inc.
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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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* DESCRIPTION
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* Platform independent, commonly used macros and defines related to linker
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* script.
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*
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* This file may be included by:
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* - Linker script files: for linker section declarations
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* - C files: for external declaration of address or size of linker section
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* - Assembly files: for external declaration of address or size of linker
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* section
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*/
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#ifndef ZEPHYR_INCLUDE_LINKER_LINKER_DEFS_H_
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#define ZEPHYR_INCLUDE_LINKER_LINKER_DEFS_H_
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#include <toolchain.h>
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#include <toolchain/common.h>
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#include <linker/sections.h>
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#include <sys/util.h>
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#include <offsets.h>
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/* We need to dummy out DT_NODE_HAS_STATUS when building the unittests.
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* Including devicetree.h would require generating dummy header files
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* to match what gen_defines creates, so it's easier to just dummy out
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* DT_NODE_HAS_STATUS.
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*/
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#ifdef ZTEST_UNITTEST
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#define DT_NODE_HAS_STATUS(node, status) 0
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#else
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#include <devicetree.h>
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#endif
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#ifdef _LINKER
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#define Z_LINK_ITERABLE(struct_type) \
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_CONCAT(_##struct_type, _list_start) = .; \
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KEEP(*(SORT_BY_NAME(._##struct_type.static.*))); \
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_CONCAT(_##struct_type, _list_end) = .
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#define Z_LINK_ITERABLE_GC_ALLOWED(struct_type) \
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_CONCAT(_##struct_type, _list_start) = .; \
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*(SORT_BY_NAME(._##struct_type.static.*)); \
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_CONCAT(_##struct_type, _list_end) = .
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/* Define an output section which will set up an iterable area
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* of equally-sized data structures. For use with Z_STRUCT_SECTION_ITERABLE.
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* Input sections will be sorted by name, per ld's SORT_BY_NAME.
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*
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* This macro should be used for read-only data.
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*
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* Note that this keeps the symbols in the image even though
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* they are not being directly referenced. Use this when symbols
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* are indirectly referenced by iterating through the section.
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*/
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#define Z_ITERABLE_SECTION_ROM(struct_type, subalign) \
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SECTION_PROLOGUE(struct_type##_area,,SUBALIGN(subalign)) \
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{ \
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Z_LINK_ITERABLE(struct_type); \
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} GROUP_ROM_LINK_IN(RAMABLE_REGION, ROMABLE_REGION)
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/* Define an output section which will set up an iterable area
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* of equally-sized data structures. For use with Z_STRUCT_SECTION_ITERABLE.
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* Input sections will be sorted by name, per ld's SORT_BY_NAME.
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*
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* This macro should be used for read-only data.
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*
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* Note that the symbols within the section can be garbage collected.
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*/
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#define Z_ITERABLE_SECTION_ROM_GC_ALLOWED(struct_type, subalign) \
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SECTION_PROLOGUE(struct_type##_area,,SUBALIGN(subalign)) \
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{ \
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Z_LINK_ITERABLE_GC_ALLOWED(struct_type); \
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} GROUP_LINK_IN(ROMABLE_REGION)
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/* Define an output section which will set up an iterable area
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* of equally-sized data structures. For use with Z_STRUCT_SECTION_ITERABLE.
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* Input sections will be sorted by name, per ld's SORT_BY_NAME.
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*
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* This macro should be used for read-write data that is modified at runtime.
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*
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* Note that this keeps the symbols in the image even though
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* they are not being directly referenced. Use this when symbols
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* are indirectly referenced by iterating through the section.
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*/
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#define Z_ITERABLE_SECTION_RAM(struct_type, subalign) \
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SECTION_DATA_PROLOGUE(struct_type##_area,,SUBALIGN(subalign)) \
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{ \
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Z_LINK_ITERABLE(struct_type); \
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} GROUP_DATA_LINK_IN(RAMABLE_REGION, ROMABLE_REGION)
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/* Define an output section which will set up an iterable area
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* of equally-sized data structures. For use with Z_STRUCT_SECTION_ITERABLE.
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* Input sections will be sorted by name, per ld's SORT_BY_NAME.
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*
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* This macro should be used for read-write data that is modified at runtime.
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*
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* Note that the symbols within the section can be garbage collected.
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*/
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#define Z_ITERABLE_SECTION_RAM_GC_ALLOWED(struct_type, subalign) \
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SECTION_DATA_PROLOGUE(struct_type##_area,,SUBALIGN(subalign)) \
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{ \
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Z_LINK_ITERABLE_GC_ALLOWED(struct_type); \
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} GROUP_DATA_LINK_IN(RAMABLE_REGION, ROMABLE_REGION)
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/*
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* generate a symbol to mark the start of the objects array for
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* the specified object and level, then link all of those objects
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* (sorted by priority). Ensure the objects aren't discarded if there is
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* no direct reference to them
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*/
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#define CREATE_OBJ_LEVEL(object, level) \
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__##object##_##level##_start = .; \
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KEEP(*(SORT(.object##_##level[0-9]_*))); \
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KEEP(*(SORT(.object##_##level[1-9][0-9]_*)));
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/*
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* link in shell initialization objects for all modules that use shell and
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* their shell commands are automatically initialized by the kernel.
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*/
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#elif defined(_ASMLANGUAGE)
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/* Assembly FILES: declaration defined by the linker script */
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GDATA(__bss_start)
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GDATA(__bss_num_words)
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#ifdef CONFIG_XIP
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GDATA(__data_rom_start)
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GDATA(__data_ram_start)
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GDATA(__data_num_words)
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#endif
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#else /* ! _ASMLANGUAGE */
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#include <zephyr/types.h>
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/*
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* Memory owned by the kernel, to be used as shared memory between
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* application threads.
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*
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* The following are extern symbols from the linker. This enables
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* the dynamic k_mem_domain and k_mem_partition creation and alignment
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* to the section produced in the linker.
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* The policy for this memory will be to initially configure all of it as
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* kernel / supervisor thread accessible.
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*/
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extern char _app_smem_start[];
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extern char _app_smem_end[];
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extern char _app_smem_size[];
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extern char _app_smem_rom_start[];
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extern char _app_smem_num_words[];
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/* Memory owned by the kernel. Start and end will be aligned for memory
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* management/protection hardware for the target architecture.
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*
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* Consists of all kernel-side globals, all kernel objects, all thread stacks,
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* and all currently unused RAM.
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*
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* Except for the stack of the currently executing thread, none of this memory
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* is normally accessible to user threads unless specifically granted at
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* runtime.
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*/
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extern char __kernel_ram_start[];
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extern char __kernel_ram_end[];
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extern char __kernel_ram_size[];
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/* Used by z_bss_zero or arch-specific implementation */
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extern char __bss_start[];
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extern char __bss_end[];
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/* Used by z_data_copy() or arch-specific implementation */
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#ifdef CONFIG_XIP
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extern char __data_rom_start[];
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extern char __data_ram_start[];
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extern char __data_ram_end[];
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#endif /* CONFIG_XIP */
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#ifdef CONFIG_MMU
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/* Virtual addresses of page-aligned kernel image mapped into RAM at boot */
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extern char z_mapped_start[];
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extern char z_mapped_end[];
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#endif /* CONFIG_MMU */
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/* Includes text and rodata */
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extern char _image_rom_start[];
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extern char _image_rom_end[];
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extern char _image_rom_size[];
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/* Includes all ROMable data, i.e. the size of the output image file. */
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extern char _flash_used[];
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/* datas, bss, noinit */
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extern char _image_ram_start[];
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extern char _image_ram_end[];
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extern char _image_text_start[];
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extern char _image_text_end[];
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extern char _image_text_size[];
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extern char _image_rodata_start[];
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extern char _image_rodata_end[];
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extern char _image_rodata_size[];
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extern char _vector_start[];
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extern char _vector_end[];
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#ifdef CONFIG_SW_VECTOR_RELAY
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extern char __vector_relay_table[];
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#endif
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#ifdef CONFIG_COVERAGE_GCOV
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extern char __gcov_bss_start[];
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extern char __gcov_bss_end[];
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extern char __gcov_bss_size[];
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#endif /* CONFIG_COVERAGE_GCOV */
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/* end address of image, used by newlib for the heap */
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extern char _end[];
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#if DT_NODE_HAS_STATUS(DT_CHOSEN(zephyr_ccm), okay)
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extern char __ccm_data_rom_start[];
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extern char __ccm_start[];
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extern char __ccm_data_start[];
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extern char __ccm_data_end[];
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extern char __ccm_bss_start[];
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extern char __ccm_bss_end[];
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extern char __ccm_noinit_start[];
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extern char __ccm_noinit_end[];
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extern char __ccm_end[];
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#endif
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#if DT_NODE_HAS_STATUS(DT_CHOSEN(zephyr_itcm), okay)
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extern char __itcm_start[];
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extern char __itcm_end[];
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extern char __itcm_size[];
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extern char __itcm_rom_start[];
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#endif
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#if DT_NODE_HAS_STATUS(DT_CHOSEN(zephyr_dtcm), okay)
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extern char __dtcm_data_start[];
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extern char __dtcm_data_end[];
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extern char __dtcm_bss_start[];
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extern char __dtcm_bss_end[];
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extern char __dtcm_noinit_start[];
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extern char __dtcm_noinit_end[];
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extern char __dtcm_data_rom_start[];
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extern char __dtcm_start[];
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extern char __dtcm_end[];
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#endif
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/* Used by the Security Attribution Unit to configure the
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* Non-Secure Callable region.
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*/
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#ifdef CONFIG_ARM_FIRMWARE_HAS_SECURE_ENTRY_FUNCS
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extern char __sg_start[];
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extern char __sg_end[];
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extern char __sg_size[];
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#endif /* CONFIG_ARM_FIRMWARE_HAS_SECURE_ENTRY_FUNCS */
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/*
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* Non-cached kernel memory region, currently only available on ARM Cortex-M7
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* with a MPU. Start and end will be aligned for memory management/protection
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* hardware for the target architecture.
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*
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* All the functions with '__nocache' keyword will be placed into this
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* section.
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*/
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#ifdef CONFIG_NOCACHE_MEMORY
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extern char _nocache_ram_start[];
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extern char _nocache_ram_end[];
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extern char _nocache_ram_size[];
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#endif /* CONFIG_NOCACHE_MEMORY */
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/* Memory owned by the kernel. Start and end will be aligned for memory
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* management/protection hardware for the target architecture.
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*
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* All the functions with '__ramfunc' keyword will be placed into this
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* section, stored in RAM instead of FLASH.
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*/
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#ifdef CONFIG_ARCH_HAS_RAMFUNC_SUPPORT
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extern char _ramfunc_ram_start[];
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extern char _ramfunc_ram_end[];
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extern char _ramfunc_ram_size[];
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extern char _ramfunc_rom_start[];
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#endif /* CONFIG_ARCH_HAS_RAMFUNC_SUPPORT */
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/* Memory owned by the kernel. Memory region for thread privilege stack buffers,
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* currently only applicable on ARM Cortex-M architecture when building with
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* support for User Mode.
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*
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* All thread privilege stack buffers will be placed into this section.
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*/
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#ifdef CONFIG_USERSPACE
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extern char z_priv_stacks_ram_start[];
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extern char z_priv_stacks_ram_end[];
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extern char z_user_stacks_start[];
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extern char z_user_stacks_end[];
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extern char z_kobject_data_begin[];
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#endif /* CONFIG_USERSPACE */
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#ifdef CONFIG_THREAD_LOCAL_STORAGE
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extern char __tdata_start[];
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extern char __tdata_end[];
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extern char __tdata_size[];
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extern char __tdata_align[];
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extern char __tbss_start[];
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extern char __tbss_end[];
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extern char __tbss_size[];
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extern char __tbss_align[];
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extern char __tls_start[];
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extern char __tls_end[];
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extern char __tls_size[];
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#endif /* CONFIG_THREAD_LOCAL_STORAGE */
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#endif /* ! _ASMLANGUAGE */
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#endif /* ZEPHYR_INCLUDE_LINKER_LINKER_DEFS_H_ */
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