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1/* ld script to make ARM Linux kernel
2 * taken from the i386 version by Russell King
3 * Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz>
4 */
5
6#include <asm-generic/vmlinux.lds.h>
7#include <asm/cache.h>
8#include <asm/thread_info.h>
9#include <asm/memory.h>
10#include <asm/page.h>
11
12#define PROC_INFO \
13 . = ALIGN(4); \
14 VMLINUX_SYMBOL(__proc_info_begin) = .; \
15 *(.proc.info.init) \
16 VMLINUX_SYMBOL(__proc_info_end) = .;
17
18#define IDMAP_TEXT \
19 ALIGN_FUNCTION(); \
20 VMLINUX_SYMBOL(__idmap_text_start) = .; \
21 *(.idmap.text) \
22 VMLINUX_SYMBOL(__idmap_text_end) = .; \
23 . = ALIGN(32); \
24 VMLINUX_SYMBOL(__hyp_idmap_text_start) = .; \
25 *(.hyp.idmap.text) \
26 VMLINUX_SYMBOL(__hyp_idmap_text_end) = .;
27
28#ifdef CONFIG_HOTPLUG_CPU
29#define ARM_CPU_DISCARD(x)
30#define ARM_CPU_KEEP(x) x
31#else
32#define ARM_CPU_DISCARD(x) x
33#define ARM_CPU_KEEP(x)
34#endif
35
36#if (defined(CONFIG_SMP_ON_UP) && !defined(CONFIG_DEBUG_SPINLOCK)) || \
37 defined(CONFIG_GENERIC_BUG)
38#define ARM_EXIT_KEEP(x) x
39#define ARM_EXIT_DISCARD(x)
40#else
41#define ARM_EXIT_KEEP(x)
42#define ARM_EXIT_DISCARD(x) x
43#endif
44
45OUTPUT_ARCH(arm)
46ENTRY(stext)
47
48#ifndef __ARMEB__
49jiffies = jiffies_64;
50#else
51jiffies = jiffies_64 + 4;
52#endif
53
54SECTIONS
55{
56 /*
57 * XXX: The linker does not define how output sections are
58 * assigned to input sections when there are multiple statements
59 * matching the same input section name. There is no documented
60 * order of matching.
61 *
62 * unwind exit sections must be discarded before the rest of the
63 * unwind sections get included.
64 */
65 /DISCARD/ : {
66 *(.ARM.exidx.exit.text)
67 *(.ARM.extab.exit.text)
68 ARM_CPU_DISCARD(*(.ARM.exidx.cpuexit.text))
69 ARM_CPU_DISCARD(*(.ARM.extab.cpuexit.text))
70 ARM_EXIT_DISCARD(EXIT_TEXT)
71 ARM_EXIT_DISCARD(EXIT_DATA)
72 EXIT_CALL
73#ifndef CONFIG_MMU
74 *(.fixup)
75 *(__ex_table)
76#endif
77#ifndef CONFIG_SMP_ON_UP
78 *(.alt.smp.init)
79#endif
80 *(.discard)
81 *(.discard.*)
82 }
83
84#ifdef CONFIG_XIP_KERNEL
85 . = XIP_VIRT_ADDR(CONFIG_XIP_PHYS_ADDR);
86#else
87 . = PAGE_OFFSET + TEXT_OFFSET;
88#endif
89 .head.text : {
90 _text = .;
91 HEAD_TEXT
92 }
93 .text : { /* Real text segment */
94 _stext = .; /* Text and read-only data */
95 __exception_text_start = .;
96 *(.exception.text)
97 __exception_text_end = .;
98 IRQENTRY_TEXT
99 TEXT_TEXT
100 SCHED_TEXT
101 LOCK_TEXT
102 KPROBES_TEXT
103 IDMAP_TEXT
104#ifdef CONFIG_MMU
105 *(.fixup)
106#endif
107 *(.gnu.warning)
108 *(.glue_7)
109 *(.glue_7t)
110 . = ALIGN(4);
111 *(.got) /* Global offset table */
112 ARM_CPU_KEEP(PROC_INFO)
113 }
114
115 RO_DATA(PAGE_SIZE)
116
117 . = ALIGN(4);
118 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {
119 __start___ex_table = .;
120#ifdef CONFIG_MMU
121 *(__ex_table)
122#endif
123 __stop___ex_table = .;
124 }
125
126#ifdef CONFIG_ARM_UNWIND
127 /*
128 * Stack unwinding tables
129 */
130 . = ALIGN(8);
131 .ARM.unwind_idx : {
132 __start_unwind_idx = .;
133 *(.ARM.exidx*)
134 __stop_unwind_idx = .;
135 }
136 .ARM.unwind_tab : {
137 __start_unwind_tab = .;
138 *(.ARM.extab*)
139 __stop_unwind_tab = .;
140 }
141#endif
142
143 NOTES
144
145 _etext = .; /* End of text and rodata section */
146
147#ifndef CONFIG_XIP_KERNEL
148 . = ALIGN(PAGE_SIZE);
149 __init_begin = .;
150#endif
151 /*
152 * The vectors and stubs are relocatable code, and the
153 * only thing that matters is their relative offsets
154 */
155 __vectors_start = .;
156 .vectors 0 : AT(__vectors_start) {
157 *(.vectors)
158 }
159 . = __vectors_start + SIZEOF(.vectors);
160 __vectors_end = .;
161
162 __stubs_start = .;
163 .stubs 0x1000 : AT(__stubs_start) {
164 *(.stubs)
165 }
166 . = __stubs_start + SIZEOF(.stubs);
167 __stubs_end = .;
168
169 INIT_TEXT_SECTION(8)
170 .exit.text : {
171 ARM_EXIT_KEEP(EXIT_TEXT)
172 }
173 .init.proc.info : {
174 ARM_CPU_DISCARD(PROC_INFO)
175 }
176 .init.arch.info : {
177 __arch_info_begin = .;
178 *(.arch.info.init)
179 __arch_info_end = .;
180 }
181 .init.tagtable : {
182 __tagtable_begin = .;
183 *(.taglist.init)
184 __tagtable_end = .;
185 }
186#ifdef CONFIG_SMP_ON_UP
187 .init.smpalt : {
188 __smpalt_begin = .;
189 *(.alt.smp.init)
190 __smpalt_end = .;
191 }
192#endif
193 .init.pv_table : {
194 __pv_table_begin = .;
195 *(.pv_table)
196 __pv_table_end = .;
197 }
198 .init.data : {
199#ifndef CONFIG_XIP_KERNEL
200 INIT_DATA
201#endif
202 INIT_SETUP(16)
203 INIT_CALLS
204 CON_INITCALL
205 SECURITY_INITCALL
206 INIT_RAM_FS
207 }
208#ifndef CONFIG_XIP_KERNEL
209 .exit.data : {
210 ARM_EXIT_KEEP(EXIT_DATA)
211 }
212#endif
213
214#ifdef CONFIG_SMP
215 PERCPU_SECTION(L1_CACHE_BYTES)
216#endif
217
218#ifdef CONFIG_XIP_KERNEL
219 __data_loc = ALIGN(4); /* location in binary */
220 . = PAGE_OFFSET + TEXT_OFFSET;
221#else
222 __init_end = .;
223 . = ALIGN(THREAD_SIZE);
224 __data_loc = .;
225#endif
226
227 .data : AT(__data_loc) {
228 _data = .; /* address in memory */
229 _sdata = .;
230
231 /*
232 * first, the init task union, aligned
233 * to an 8192 byte boundary.
234 */
235 INIT_TASK_DATA(THREAD_SIZE)
236
237#ifdef CONFIG_XIP_KERNEL
238 . = ALIGN(PAGE_SIZE);
239 __init_begin = .;
240 INIT_DATA
241 ARM_EXIT_KEEP(EXIT_DATA)
242 . = ALIGN(PAGE_SIZE);
243 __init_end = .;
244#endif
245
246 NOSAVE_DATA
247 CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES)
248 READ_MOSTLY_DATA(L1_CACHE_BYTES)
249
250 /*
251 * and the usual data section
252 */
253 DATA_DATA
254 CONSTRUCTORS
255
256 _edata = .;
257 }
258 _edata_loc = __data_loc + SIZEOF(.data);
259
260#ifdef CONFIG_HAVE_TCM
261 /*
262 * We align everything to a page boundary so we can
263 * free it after init has commenced and TCM contents have
264 * been copied to its destination.
265 */
266 .tcm_start : {
267 . = ALIGN(PAGE_SIZE);
268 __tcm_start = .;
269 __itcm_start = .;
270 }
271
272 /*
273 * Link these to the ITCM RAM
274 * Put VMA to the TCM address and LMA to the common RAM
275 * and we'll upload the contents from RAM to TCM and free
276 * the used RAM after that.
277 */
278 .text_itcm ITCM_OFFSET : AT(__itcm_start)
279 {
280 __sitcm_text = .;
281 *(.tcm.text)
282 *(.tcm.rodata)
283 . = ALIGN(4);
284 __eitcm_text = .;
285 }
286
287 /*
288 * Reset the dot pointer, this is needed to create the
289 * relative __dtcm_start below (to be used as extern in code).
290 */
291 . = ADDR(.tcm_start) + SIZEOF(.tcm_start) + SIZEOF(.text_itcm);
292
293 .dtcm_start : {
294 __dtcm_start = .;
295 }
296
297 /* TODO: add remainder of ITCM as well, that can be used for data! */
298 .data_dtcm DTCM_OFFSET : AT(__dtcm_start)
299 {
300 . = ALIGN(4);
301 __sdtcm_data = .;
302 *(.tcm.data)
303 . = ALIGN(4);
304 __edtcm_data = .;
305 }
306
307 /* Reset the dot pointer or the linker gets confused */
308 . = ADDR(.dtcm_start) + SIZEOF(.data_dtcm);
309
310 /* End marker for freeing TCM copy in linked object */
311 .tcm_end : AT(ADDR(.dtcm_start) + SIZEOF(.data_dtcm)){
312 . = ALIGN(PAGE_SIZE);
313 __tcm_end = .;
314 }
315#endif
316
317 BSS_SECTION(0, 0, 0)
318 _end = .;
319
320 STABS_DEBUG
321 .comment 0 : { *(.comment) }
322}
323
324/*
325 * These must never be empty
326 * If you have to comment these two assert statements out, your
327 * binutils is too old (for other reasons as well)
328 */
329ASSERT((__proc_info_end - __proc_info_begin), "missing CPU support")
330ASSERT((__arch_info_end - __arch_info_begin), "no machine record defined")
331/*
332 * The HYP init code can't be more than a page long.
333 * The above comment applies as well.
334 */
335ASSERT(((__hyp_idmap_text_end - __hyp_idmap_text_start) <= PAGE_SIZE), "HYP init code too big")
1/* SPDX-License-Identifier: GPL-2.0 */
2/* ld script to make ARM Linux kernel
3 * taken from the i386 version by Russell King
4 * Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz>
5 */
6
7#ifdef CONFIG_XIP_KERNEL
8#include "vmlinux-xip.lds.S"
9#else
10
11#include <linux/pgtable.h>
12#include <asm/vmlinux.lds.h>
13#include <asm/cache.h>
14#include <asm/thread_info.h>
15#include <asm/memory.h>
16#include <asm/mpu.h>
17#include <asm/page.h>
18
19OUTPUT_ARCH(arm)
20ENTRY(stext)
21
22#ifndef __ARMEB__
23jiffies = jiffies_64;
24#else
25jiffies = jiffies_64 + 4;
26#endif
27
28SECTIONS
29{
30 /*
31 * XXX: The linker does not define how output sections are
32 * assigned to input sections when there are multiple statements
33 * matching the same input section name. There is no documented
34 * order of matching.
35 *
36 * unwind exit sections must be discarded before the rest of the
37 * unwind sections get included.
38 */
39 /DISCARD/ : {
40 ARM_DISCARD
41#ifndef CONFIG_SMP_ON_UP
42 *(.alt.smp.init)
43#endif
44#ifndef CONFIG_ARM_UNWIND
45 *(.ARM.exidx) *(.ARM.exidx.*)
46 *(.ARM.extab) *(.ARM.extab.*)
47#endif
48 }
49
50 . = KERNEL_OFFSET + TEXT_OFFSET;
51 .head.text : {
52 _text = .;
53 HEAD_TEXT
54 }
55
56#ifdef CONFIG_STRICT_KERNEL_RWX
57 . = ALIGN(1<<SECTION_SHIFT);
58#endif
59
60#ifdef CONFIG_ARM_MPU
61 . = ALIGN(PMSAv8_MINALIGN);
62#endif
63 .text : { /* Real text segment */
64 _stext = .; /* Text and read-only data */
65 ARM_TEXT
66 }
67
68#ifdef CONFIG_DEBUG_ALIGN_RODATA
69 . = ALIGN(1<<SECTION_SHIFT);
70#endif
71 _etext = .; /* End of text section */
72
73 RO_DATA(PAGE_SIZE)
74
75 . = ALIGN(4);
76 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {
77 __start___ex_table = .;
78 ARM_MMU_KEEP(*(__ex_table))
79 __stop___ex_table = .;
80 }
81
82#ifdef CONFIG_ARM_UNWIND
83 ARM_UNWIND_SECTIONS
84#endif
85
86#ifdef CONFIG_STRICT_KERNEL_RWX
87 . = ALIGN(1<<SECTION_SHIFT);
88#else
89 . = ALIGN(PAGE_SIZE);
90#endif
91 __init_begin = .;
92
93 ARM_VECTORS
94 INIT_TEXT_SECTION(8)
95 .exit.text : {
96 ARM_EXIT_KEEP(EXIT_TEXT)
97 }
98 .init.proc.info : {
99 ARM_CPU_DISCARD(PROC_INFO)
100 }
101 .init.arch.info : {
102 __arch_info_begin = .;
103 *(.arch.info.init)
104 __arch_info_end = .;
105 }
106 .init.tagtable : {
107 __tagtable_begin = .;
108 *(.taglist.init)
109 __tagtable_end = .;
110 }
111#ifdef CONFIG_SMP_ON_UP
112 .init.smpalt : {
113 __smpalt_begin = .;
114 *(.alt.smp.init)
115 __smpalt_end = .;
116 }
117#endif
118 .init.pv_table : {
119 __pv_table_begin = .;
120 *(.pv_table)
121 __pv_table_end = .;
122 }
123
124 INIT_DATA_SECTION(16)
125
126 .exit.data : {
127 ARM_EXIT_KEEP(EXIT_DATA)
128 }
129
130#ifdef CONFIG_SMP
131 PERCPU_SECTION(L1_CACHE_BYTES)
132#endif
133
134#ifdef CONFIG_HAVE_TCM
135 ARM_TCM
136#endif
137
138#ifdef CONFIG_STRICT_KERNEL_RWX
139 . = ALIGN(1<<SECTION_SHIFT);
140#else
141 . = ALIGN(THREAD_SIZE);
142#endif
143 __init_end = .;
144
145 _sdata = .;
146 RW_DATA(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE)
147 _edata = .;
148
149 BSS_SECTION(0, 0, 0)
150#ifdef CONFIG_ARM_MPU
151 . = ALIGN(PMSAv8_MINALIGN);
152#endif
153 _end = .;
154
155 STABS_DEBUG
156 DWARF_DEBUG
157 ARM_DETAILS
158
159 ARM_ASSERTS
160}
161
162#ifdef CONFIG_STRICT_KERNEL_RWX
163/*
164 * Without CONFIG_DEBUG_ALIGN_RODATA, __start_rodata_section_aligned will
165 * be the first section-aligned location after __start_rodata. Otherwise,
166 * it will be equal to __start_rodata.
167 */
168__start_rodata_section_aligned = ALIGN(__start_rodata, 1 << SECTION_SHIFT);
169#endif
170
171/*
172 * These must never be empty
173 * If you have to comment these two assert statements out, your
174 * binutils is too old (for other reasons as well)
175 */
176ASSERT((__proc_info_end - __proc_info_begin), "missing CPU support")
177ASSERT((__arch_info_end - __arch_info_begin), "no machine record defined")
178
179#endif /* CONFIG_XIP_KERNEL */