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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/* 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")