Zephyr API Documentation 4.0.99
A Scalable Open Source RTOS
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linker-defs.h
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1/*
2 * Copyright (c) 2013-2014, Wind River Systems, Inc.
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7/*
8 * DESCRIPTION
9 * Platform independent, commonly used macros and defines related to linker
10 * script.
11 *
12 * This file may be included by:
13 * - Linker script files: for linker section declarations
14 * - C files: for external declaration of address or size of linker section
15 * - Assembly files: for external declaration of address or size of linker
16 * section
17 */
18
19#ifndef ZEPHYR_INCLUDE_LINKER_LINKER_DEFS_H_
20#define ZEPHYR_INCLUDE_LINKER_LINKER_DEFS_H_
21
22#include <zephyr/toolchain.h>
23#include <zephyr/toolchain/common.h>
24#include <zephyr/linker/sections.h>
25#include <zephyr/sys/util.h>
26#include <zephyr/offsets.h>
27
28/* We need to dummy out DT_NODE_HAS_STATUS when building the unittests.
29 * Including devicetree.h would require generating dummy header files
30 * to match what gen_defines creates, so it's easier to just dummy out
31 * DT_NODE_HAS_STATUS.
32 */
33#ifdef ZTEST_UNITTEST
34#define DT_NODE_HAS_STATUS(node, status) 0
35#define DT_NODE_HAS_STATUS_OKAY(node) 0
36#else
37#include <zephyr/devicetree.h>
38#endif
39
40#ifdef _LINKER
41/*
42 * generate a symbol to mark the start of the objects array for
43 * the specified object and level, then link all of those objects
44 * (sorted by priority). Ensure the objects aren't discarded if there is
45 * no direct reference to them
46 */
47#define CREATE_OBJ_LEVEL(object, level) \
48 __##object##_##level##_start = .; \
49 KEEP(*(SORT(.z_##object##_##level?_*))); \
50 KEEP(*(SORT(.z_##object##_##level??_*)));
51
52/*
53 * link in shell initialization objects for all modules that use shell and
54 * their shell commands are automatically initialized by the kernel.
55 */
56
57#elif defined(_ASMLANGUAGE)
58
59/* Assembly FILES: declaration defined by the linker script */
60GDATA(__bss_start)
61GDATA(__bss_num_words)
62#ifdef CONFIG_XIP
63GDATA(__data_region_load_start)
64GDATA(__data_region_start)
65GDATA(__data_region_num_words)
66#endif
67
68#else /* ! _ASMLANGUAGE */
69
70#include <zephyr/types.h>
71/*
72 * Memory owned by the kernel, to be used as shared memory between
73 * application threads.
74 *
75 * The following are extern symbols from the linker. This enables
76 * the dynamic k_mem_domain and k_mem_partition creation and alignment
77 * to the section produced in the linker.
78
79 * The policy for this memory will be to initially configure all of it as
80 * kernel / supervisor thread accessible.
81 */
82extern char _app_smem_start[];
83extern char _app_smem_end[];
84extern char _app_smem_size[];
85extern char _app_smem_rom_start[];
86extern char _app_smem_num_words[];
87
88#ifdef CONFIG_LINKER_USE_PINNED_SECTION
89extern char _app_smem_pinned_start[];
90extern char _app_smem_pinned_end[];
91extern char _app_smem_pinned_size[];
92extern char _app_smem_pinned_num_words[];
93#endif
94
95/* Memory owned by the kernel. Start and end will be aligned for memory
96 * management/protection hardware for the target architecture.
97 *
98 * Consists of all kernel-side globals, all kernel objects, all thread stacks,
99 * and all currently unused RAM.
100 *
101 * Except for the stack of the currently executing thread, none of this memory
102 * is normally accessible to user threads unless specifically granted at
103 * runtime.
104 */
105extern char __kernel_ram_start[];
106extern char __kernel_ram_end[];
107extern char __kernel_ram_size[];
108
109/* Used by z_bss_zero or arch-specific implementation */
110extern char __bss_start[];
111extern char __bss_end[];
112
113/* Used by z_data_copy() or arch-specific implementation */
114#ifdef CONFIG_XIP
115extern char __data_region_load_start[];
116extern char __data_region_start[];
117extern char __data_region_end[];
118#endif /* CONFIG_XIP */
119
120#ifdef CONFIG_MMU
121/* Virtual addresses of page-aligned kernel image mapped into RAM at boot */
122extern char z_mapped_start[];
123extern char z_mapped_end[];
124#endif /* CONFIG_MMU */
125
126/* Includes text and rodata */
127extern char __rom_region_start[];
128extern char __rom_region_end[];
129extern char __rom_region_size[];
130
131/* Includes all ROMable data, i.e. the size of the output image file. */
132extern char _flash_used[];
133
134/* datas, bss, noinit */
135extern char _image_ram_start[];
136extern char _image_ram_end[];
137extern char _image_ram_size[];
138
139extern char __text_region_start[];
140extern char __text_region_end[];
141extern char __text_region_size[];
142
143extern char __rodata_region_start[];
144extern char __rodata_region_end[];
145extern char __rodata_region_size[];
146
147extern char _vector_start[];
148extern char _vector_end[];
149
150#ifdef CONFIG_SW_VECTOR_RELAY
151extern char __vector_relay_table[];
152#endif
153
154#ifdef CONFIG_COVERAGE_GCOV
155extern char __gcov_bss_start[];
156extern char __gcov_bss_end[];
157extern char __gcov_bss_size[];
158#endif /* CONFIG_COVERAGE_GCOV */
159
160/* end address of image, used by newlib for the heap */
161extern char _end[];
162
163#if (DT_NODE_HAS_STATUS_OKAY(DT_CHOSEN(zephyr_ccm)))
164extern char __ccm_data_rom_start[];
165extern char __ccm_start[];
166extern char __ccm_data_start[];
167extern char __ccm_data_end[];
168extern char __ccm_bss_start[];
169extern char __ccm_bss_end[];
170extern char __ccm_noinit_start[];
171extern char __ccm_noinit_end[];
172extern char __ccm_end[];
173#endif
174
175#if (DT_NODE_HAS_STATUS_OKAY(DT_CHOSEN(zephyr_itcm)))
176extern char __itcm_start[];
177extern char __itcm_end[];
178extern char __itcm_size[];
179extern char __itcm_load_start[];
180#endif
181
182#if (DT_NODE_HAS_STATUS_OKAY(DT_CHOSEN(zephyr_dtcm)))
183extern char __dtcm_data_start[];
184extern char __dtcm_data_end[];
185extern char __dtcm_bss_start[];
186extern char __dtcm_bss_end[];
187extern char __dtcm_noinit_start[];
188extern char __dtcm_noinit_end[];
189extern char __dtcm_data_load_start[];
190extern char __dtcm_start[];
191extern char __dtcm_end[];
192#endif
193
194#if (DT_NODE_HAS_STATUS_OKAY(DT_CHOSEN(zephyr_ocm)))
195extern char __ocm_data_start[];
196extern char __ocm_data_end[];
197extern char __ocm_bss_start[];
198extern char __ocm_bss_end[];
199extern char __ocm_start[];
200extern char __ocm_end[];
201extern char __ocm_size[];
202#endif
203
204/* Used by the Security Attribution Unit to configure the
205 * Non-Secure Callable region.
206 */
207#ifdef CONFIG_ARM_FIRMWARE_HAS_SECURE_ENTRY_FUNCS
208extern char __sg_start[];
209extern char __sg_end[];
210extern char __sg_size[];
211#endif /* CONFIG_ARM_FIRMWARE_HAS_SECURE_ENTRY_FUNCS */
212
213/*
214 * Non-cached kernel memory region, currently only available on ARM Cortex-M7
215 * with a MPU. Start and end will be aligned for memory management/protection
216 * hardware for the target architecture.
217 *
218 * All the functions with '__nocache' keyword will be placed into this
219 * section.
220 */
221#ifdef CONFIG_NOCACHE_MEMORY
222extern char _nocache_ram_start[];
223extern char _nocache_ram_end[];
224extern char _nocache_ram_size[];
225#endif /* CONFIG_NOCACHE_MEMORY */
226
227/* Memory owned by the kernel. Start and end will be aligned for memory
228 * management/protection hardware for the target architecture.
229 *
230 * All the functions with '__ramfunc' keyword will be placed into this
231 * section, stored in RAM instead of FLASH.
232 */
233#ifdef CONFIG_ARCH_HAS_RAMFUNC_SUPPORT
234extern char __ramfunc_region_start[];
235extern char __ramfunc_start[];
236extern char __ramfunc_end[];
237extern char __ramfunc_size[];
238extern char __ramfunc_load_start[];
239#endif /* CONFIG_ARCH_HAS_RAMFUNC_SUPPORT */
240
241/* Memory owned by the kernel. Memory region for thread privilege stack buffers,
242 * currently only applicable on ARM Cortex-M architecture when building with
243 * support for User Mode.
244 *
245 * All thread privilege stack buffers will be placed into this section.
246 */
247#ifdef CONFIG_USERSPACE
248extern char z_priv_stacks_ram_start[];
249extern char z_priv_stacks_ram_end[];
250extern char z_user_stacks_start[];
251extern char z_user_stacks_end[];
252extern char z_kobject_data_begin[];
253#endif /* CONFIG_USERSPACE */
254
255#ifdef CONFIG_THREAD_LOCAL_STORAGE
256extern char __tdata_start[];
257extern char __tdata_end[];
258extern char __tdata_size[];
259extern char __tdata_align[];
260extern char __tbss_start[];
261extern char __tbss_end[];
262extern char __tbss_size[];
263extern char __tbss_align[];
264extern char __tls_start[];
265extern char __tls_end[];
266extern char __tls_size[];
267#endif /* CONFIG_THREAD_LOCAL_STORAGE */
268
269#ifdef CONFIG_LINKER_USE_BOOT_SECTION
270/* lnkr_boot_start[] and lnkr_boot_end[]
271 * must encapsulate all the boot sections.
272 */
273extern char lnkr_boot_start[];
274extern char lnkr_boot_end[];
275
276extern char lnkr_boot_text_start[];
277extern char lnkr_boot_text_end[];
278extern char lnkr_boot_text_size[];
279extern char lnkr_boot_data_start[];
280extern char lnkr_boot_data_end[];
281extern char lnkr_boot_data_size[];
282extern char lnkr_boot_rodata_start[];
283extern char lnkr_boot_rodata_end[];
284extern char lnkr_boot_rodata_size[];
285extern char lnkr_boot_bss_start[];
286extern char lnkr_boot_bss_end[];
287extern char lnkr_boot_bss_size[];
288extern char lnkr_boot_noinit_start[];
289extern char lnkr_boot_noinit_end[];
290extern char lnkr_boot_noinit_size[];
291#endif /* CONFIG_LINKER_USE_BOOT_SECTION */
292
293#ifdef CONFIG_LINKER_USE_PINNED_SECTION
294/* lnkr_pinned_start[] and lnkr_pinned_end[] must encapsulate
295 * all the pinned sections as these are used by
296 * the MMU code to mark the physical page frames with
297 * K_MEM_PAGE_FRAME_PINNED.
298 */
299extern char lnkr_pinned_start[];
300extern char lnkr_pinned_end[];
301
302extern char lnkr_pinned_text_start[];
303extern char lnkr_pinned_text_end[];
304extern char lnkr_pinned_text_size[];
305extern char lnkr_pinned_data_start[];
306extern char lnkr_pinned_data_end[];
307extern char lnkr_pinned_data_size[];
308extern char lnkr_pinned_rodata_start[];
309extern char lnkr_pinned_rodata_end[];
310extern char lnkr_pinned_rodata_size[];
311extern char lnkr_pinned_bss_start[];
312extern char lnkr_pinned_bss_end[];
313extern char lnkr_pinned_bss_size[];
314extern char lnkr_pinned_noinit_start[];
315extern char lnkr_pinned_noinit_end[];
316extern char lnkr_pinned_noinit_size[];
317
318__pinned_func
319static inline bool lnkr_is_pinned(uint8_t *addr)
320{
321 if ((addr >= (uint8_t *)lnkr_pinned_start) &&
322 (addr < (uint8_t *)lnkr_pinned_end)) {
323 return true;
324 } else {
325 return false;
326 }
327}
328
329__pinned_func
330static inline bool lnkr_is_region_pinned(uint8_t *addr, size_t sz)
331{
332 if ((addr >= (uint8_t *)lnkr_pinned_start) &&
333 ((addr + sz) < (uint8_t *)lnkr_pinned_end)) {
334 return true;
335 } else {
336 return false;
337 }
338}
339
340#endif /* CONFIG_LINKER_USE_PINNED_SECTION */
341
342#ifdef CONFIG_LINKER_USE_ONDEMAND_SECTION
343/* lnkr_ondemand_start[] and lnkr_ondemand_end[] must encapsulate
344 * all the on-demand sections as these are used by
345 * the MMU code to mark the virtual pages with the appropriate backing store
346 * location token to have them be paged in on demand.
347 */
348extern char lnkr_ondemand_start[];
349extern char lnkr_ondemand_end[];
350extern char lnkr_ondemand_load_start[];
351
352extern char lnkr_ondemand_text_start[];
353extern char lnkr_ondemand_text_end[];
354extern char lnkr_ondemand_text_size[];
355extern char lnkr_ondemand_rodata_start[];
356extern char lnkr_ondemand_rodata_end[];
357extern char lnkr_ondemand_rodata_size[];
358
359#endif /* CONFIG_LINKER_USE_ONDEMAND_SECTION */
360#endif /* ! _ASMLANGUAGE */
361
362#endif /* ZEPHYR_INCLUDE_LINKER_LINKER_DEFS_H_ */
devicetree.h
Devicetree main header.
common.h
Common toolchain abstraction.
sections.h
Definitions of various linker Sections.
uint8_t
__UINT8_TYPE__ uint8_t
Definition stdint.h:88
util.h
Misc utilities.
toolchain.h
Macros to abstract toolchain specific capabilities.