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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/thread_info.h>
8#include <asm/memory.h>
9#include <asm/page.h>
10
11#define PROC_INFO \
12 VMLINUX_SYMBOL(__proc_info_begin) = .; \
13 *(.proc.info.init) \
14 VMLINUX_SYMBOL(__proc_info_end) = .;
15
16#ifdef CONFIG_HOTPLUG_CPU
17#define ARM_CPU_DISCARD(x)
18#define ARM_CPU_KEEP(x) x
19#else
20#define ARM_CPU_DISCARD(x) x
21#define ARM_CPU_KEEP(x)
22#endif
23
24#if defined(CONFIG_SMP_ON_UP) && !defined(CONFIG_DEBUG_SPINLOCK)
25#define ARM_EXIT_KEEP(x) x
26#define ARM_EXIT_DISCARD(x)
27#else
28#define ARM_EXIT_KEEP(x)
29#define ARM_EXIT_DISCARD(x) x
30#endif
31
32OUTPUT_ARCH(arm)
33ENTRY(stext)
34
35#ifndef __ARMEB__
36jiffies = jiffies_64;
37#else
38jiffies = jiffies_64 + 4;
39#endif
40
41SECTIONS
42{
43 /*
44 * XXX: The linker does not define how output sections are
45 * assigned to input sections when there are multiple statements
46 * matching the same input section name. There is no documented
47 * order of matching.
48 *
49 * unwind exit sections must be discarded before the rest of the
50 * unwind sections get included.
51 */
52 /DISCARD/ : {
53 *(.ARM.exidx.exit.text)
54 *(.ARM.extab.exit.text)
55 ARM_CPU_DISCARD(*(.ARM.exidx.cpuexit.text))
56 ARM_CPU_DISCARD(*(.ARM.extab.cpuexit.text))
57 ARM_EXIT_DISCARD(EXIT_TEXT)
58 ARM_EXIT_DISCARD(EXIT_DATA)
59 EXIT_CALL
60#ifndef CONFIG_HOTPLUG
61 *(.ARM.exidx.devexit.text)
62 *(.ARM.extab.devexit.text)
63#endif
64#ifndef CONFIG_MMU
65 *(.fixup)
66 *(__ex_table)
67#endif
68#ifndef CONFIG_SMP_ON_UP
69 *(.alt.smp.init)
70#endif
71 *(.discard)
72 *(.discard.*)
73 }
74
75#ifdef CONFIG_XIP_KERNEL
76 . = XIP_VIRT_ADDR(CONFIG_XIP_PHYS_ADDR);
77#else
78 . = PAGE_OFFSET + TEXT_OFFSET;
79#endif
80 .head.text : {
81 _text = .;
82 HEAD_TEXT
83 }
84 .text : { /* Real text segment */
85 _stext = .; /* Text and read-only data */
86 __exception_text_start = .;
87 *(.exception.text)
88 __exception_text_end = .;
89 IRQENTRY_TEXT
90 TEXT_TEXT
91 SCHED_TEXT
92 LOCK_TEXT
93 KPROBES_TEXT
94#ifdef CONFIG_MMU
95 *(.fixup)
96#endif
97 *(.gnu.warning)
98 *(.glue_7)
99 *(.glue_7t)
100 . = ALIGN(4);
101 *(.got) /* Global offset table */
102 ARM_CPU_KEEP(PROC_INFO)
103 }
104
105 RO_DATA(PAGE_SIZE)
106
107#ifdef CONFIG_ARM_UNWIND
108 /*
109 * Stack unwinding tables
110 */
111 . = ALIGN(8);
112 .ARM.unwind_idx : {
113 __start_unwind_idx = .;
114 *(.ARM.exidx*)
115 __stop_unwind_idx = .;
116 }
117 .ARM.unwind_tab : {
118 __start_unwind_tab = .;
119 *(.ARM.extab*)
120 __stop_unwind_tab = .;
121 }
122#endif
123
124 _etext = .; /* End of text and rodata section */
125
126#ifndef CONFIG_XIP_KERNEL
127 . = ALIGN(PAGE_SIZE);
128 __init_begin = .;
129#endif
130
131 INIT_TEXT_SECTION(8)
132 .exit.text : {
133 ARM_EXIT_KEEP(EXIT_TEXT)
134 }
135 .init.proc.info : {
136 ARM_CPU_DISCARD(PROC_INFO)
137 }
138 .init.arch.info : {
139 __arch_info_begin = .;
140 *(.arch.info.init)
141 __arch_info_end = .;
142 }
143 .init.tagtable : {
144 __tagtable_begin = .;
145 *(.taglist.init)
146 __tagtable_end = .;
147 }
148#ifdef CONFIG_SMP_ON_UP
149 .init.smpalt : {
150 __smpalt_begin = .;
151 *(.alt.smp.init)
152 __smpalt_end = .;
153 }
154#endif
155 .init.pv_table : {
156 __pv_table_begin = .;
157 *(.pv_table)
158 __pv_table_end = .;
159 }
160 .init.data : {
161#ifndef CONFIG_XIP_KERNEL
162 INIT_DATA
163#endif
164 INIT_SETUP(16)
165 INIT_CALLS
166 CON_INITCALL
167 SECURITY_INITCALL
168 INIT_RAM_FS
169 }
170#ifndef CONFIG_XIP_KERNEL
171 .exit.data : {
172 ARM_EXIT_KEEP(EXIT_DATA)
173 }
174#endif
175
176 PERCPU_SECTION(32)
177
178#ifdef CONFIG_XIP_KERNEL
179 __data_loc = ALIGN(4); /* location in binary */
180 . = PAGE_OFFSET + TEXT_OFFSET;
181#else
182 __init_end = .;
183 . = ALIGN(THREAD_SIZE);
184 __data_loc = .;
185#endif
186
187 .data : AT(__data_loc) {
188 _data = .; /* address in memory */
189 _sdata = .;
190
191 /*
192 * first, the init task union, aligned
193 * to an 8192 byte boundary.
194 */
195 INIT_TASK_DATA(THREAD_SIZE)
196
197#ifdef CONFIG_XIP_KERNEL
198 . = ALIGN(PAGE_SIZE);
199 __init_begin = .;
200 INIT_DATA
201 ARM_EXIT_KEEP(EXIT_DATA)
202 . = ALIGN(PAGE_SIZE);
203 __init_end = .;
204#endif
205
206 NOSAVE_DATA
207 CACHELINE_ALIGNED_DATA(32)
208 READ_MOSTLY_DATA(32)
209
210 /*
211 * The exception fixup table (might need resorting at runtime)
212 */
213 . = ALIGN(32);
214 __start___ex_table = .;
215#ifdef CONFIG_MMU
216 *(__ex_table)
217#endif
218 __stop___ex_table = .;
219
220 /*
221 * and the usual data section
222 */
223 DATA_DATA
224 CONSTRUCTORS
225
226 _edata = .;
227 }
228 _edata_loc = __data_loc + SIZEOF(.data);
229
230#ifdef CONFIG_HAVE_TCM
231 /*
232 * We align everything to a page boundary so we can
233 * free it after init has commenced and TCM contents have
234 * been copied to its destination.
235 */
236 .tcm_start : {
237 . = ALIGN(PAGE_SIZE);
238 __tcm_start = .;
239 __itcm_start = .;
240 }
241
242 /*
243 * Link these to the ITCM RAM
244 * Put VMA to the TCM address and LMA to the common RAM
245 * and we'll upload the contents from RAM to TCM and free
246 * the used RAM after that.
247 */
248 .text_itcm ITCM_OFFSET : AT(__itcm_start)
249 {
250 __sitcm_text = .;
251 *(.tcm.text)
252 *(.tcm.rodata)
253 . = ALIGN(4);
254 __eitcm_text = .;
255 }
256
257 /*
258 * Reset the dot pointer, this is needed to create the
259 * relative __dtcm_start below (to be used as extern in code).
260 */
261 . = ADDR(.tcm_start) + SIZEOF(.tcm_start) + SIZEOF(.text_itcm);
262
263 .dtcm_start : {
264 __dtcm_start = .;
265 }
266
267 /* TODO: add remainder of ITCM as well, that can be used for data! */
268 .data_dtcm DTCM_OFFSET : AT(__dtcm_start)
269 {
270 . = ALIGN(4);
271 __sdtcm_data = .;
272 *(.tcm.data)
273 . = ALIGN(4);
274 __edtcm_data = .;
275 }
276
277 /* Reset the dot pointer or the linker gets confused */
278 . = ADDR(.dtcm_start) + SIZEOF(.data_dtcm);
279
280 /* End marker for freeing TCM copy in linked object */
281 .tcm_end : AT(ADDR(.dtcm_start) + SIZEOF(.data_dtcm)){
282 . = ALIGN(PAGE_SIZE);
283 __tcm_end = .;
284 }
285#endif
286
287 NOTES
288
289 BSS_SECTION(0, 0, 0)
290 _end = .;
291
292 STABS_DEBUG
293 .comment 0 : { *(.comment) }
294}
295
296/*
297 * These must never be empty
298 * If you have to comment these two assert statements out, your
299 * binutils is too old (for other reasons as well)
300 */
301ASSERT((__proc_info_end - __proc_info_begin), "missing CPU support")
302ASSERT((__arch_info_end - __arch_info_begin), "no machine record defined")
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_ALIGN);
142#endif
143 __init_end = .;
144
145 _sdata = .;
146 RW_DATA(L1_CACHE_BYTES, PAGE_SIZE, THREAD_ALIGN)
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")
177#ifndef CONFIG_COMPILE_TEST
178ASSERT((__arch_info_end - __arch_info_begin), "no machine record defined")
179#endif
180
181#endif /* CONFIG_XIP_KERNEL */