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Merge tag 'dmaengine-fix-4.13-rc7' of git://git.infradead.org/users/vkoul/slave-dma
[mirror_ubuntu-artful-kernel.git] / include / asm-generic / vmlinux.lds.h
1 /*
2 * Helper macros to support writing architecture specific
3 * linker scripts.
4 *
5 * A minimal linker scripts has following content:
6 * [This is a sample, architectures may have special requiriements]
7 *
8 * OUTPUT_FORMAT(...)
9 * OUTPUT_ARCH(...)
10 * ENTRY(...)
11 * SECTIONS
12 * {
13 * . = START;
14 * __init_begin = .;
15 * HEAD_TEXT_SECTION
16 * INIT_TEXT_SECTION(PAGE_SIZE)
17 * INIT_DATA_SECTION(...)
18 * PERCPU_SECTION(CACHELINE_SIZE)
19 * __init_end = .;
20 *
21 * _stext = .;
22 * TEXT_SECTION = 0
23 * _etext = .;
24 *
25 * _sdata = .;
26 * RO_DATA_SECTION(PAGE_SIZE)
27 * RW_DATA_SECTION(...)
28 * _edata = .;
29 *
30 * EXCEPTION_TABLE(...)
31 * NOTES
32 *
33 * BSS_SECTION(0, 0, 0)
34 * _end = .;
35 *
36 * STABS_DEBUG
37 * DWARF_DEBUG
38 *
39 * DISCARDS // must be the last
40 * }
41 *
42 * [__init_begin, __init_end] is the init section that may be freed after init
43 * // __init_begin and __init_end should be page aligned, so that we can
44 * // free the whole .init memory
45 * [_stext, _etext] is the text section
46 * [_sdata, _edata] is the data section
47 *
48 * Some of the included output section have their own set of constants.
49 * Examples are: [__initramfs_start, __initramfs_end] for initramfs and
50 * [__nosave_begin, __nosave_end] for the nosave data
51 */
52
53 #ifndef LOAD_OFFSET
54 #define LOAD_OFFSET 0
55 #endif
56
57 #include <linux/export.h>
58
59 /* Align . to a 8 byte boundary equals to maximum function alignment. */
60 #define ALIGN_FUNCTION() . = ALIGN(8)
61
62 /*
63 * LD_DEAD_CODE_DATA_ELIMINATION option enables -fdata-sections, which
64 * generates .data.identifier sections, which need to be pulled in with
65 * .data. We don't want to pull in .data..other sections, which Linux
66 * has defined. Same for text and bss.
67 */
68 #ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
69 #define TEXT_MAIN .text .text.[0-9a-zA-Z_]*
70 #define DATA_MAIN .data .data.[0-9a-zA-Z_]*
71 #define BSS_MAIN .bss .bss.[0-9a-zA-Z_]*
72 #else
73 #define TEXT_MAIN .text
74 #define DATA_MAIN .data
75 #define BSS_MAIN .bss
76 #endif
77
78 /*
79 * Align to a 32 byte boundary equal to the
80 * alignment gcc 4.5 uses for a struct
81 */
82 #define STRUCT_ALIGNMENT 32
83 #define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT)
84
85 /* The actual configuration determine if the init/exit sections
86 * are handled as text/data or they can be discarded (which
87 * often happens at runtime)
88 */
89 #ifdef CONFIG_HOTPLUG_CPU
90 #define CPU_KEEP(sec) *(.cpu##sec)
91 #define CPU_DISCARD(sec)
92 #else
93 #define CPU_KEEP(sec)
94 #define CPU_DISCARD(sec) *(.cpu##sec)
95 #endif
96
97 #if defined(CONFIG_MEMORY_HOTPLUG)
98 #define MEM_KEEP(sec) *(.mem##sec)
99 #define MEM_DISCARD(sec)
100 #else
101 #define MEM_KEEP(sec)
102 #define MEM_DISCARD(sec) *(.mem##sec)
103 #endif
104
105 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
106 #define MCOUNT_REC() . = ALIGN(8); \
107 VMLINUX_SYMBOL(__start_mcount_loc) = .; \
108 *(__mcount_loc) \
109 VMLINUX_SYMBOL(__stop_mcount_loc) = .;
110 #else
111 #define MCOUNT_REC()
112 #endif
113
114 #ifdef CONFIG_TRACE_BRANCH_PROFILING
115 #define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \
116 *(_ftrace_annotated_branch) \
117 VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .;
118 #else
119 #define LIKELY_PROFILE()
120 #endif
121
122 #ifdef CONFIG_PROFILE_ALL_BRANCHES
123 #define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \
124 *(_ftrace_branch) \
125 VMLINUX_SYMBOL(__stop_branch_profile) = .;
126 #else
127 #define BRANCH_PROFILE()
128 #endif
129
130 #ifdef CONFIG_KPROBES
131 #define KPROBE_BLACKLIST() . = ALIGN(8); \
132 VMLINUX_SYMBOL(__start_kprobe_blacklist) = .; \
133 KEEP(*(_kprobe_blacklist)) \
134 VMLINUX_SYMBOL(__stop_kprobe_blacklist) = .;
135 #else
136 #define KPROBE_BLACKLIST()
137 #endif
138
139 #ifdef CONFIG_EVENT_TRACING
140 #define FTRACE_EVENTS() . = ALIGN(8); \
141 VMLINUX_SYMBOL(__start_ftrace_events) = .; \
142 KEEP(*(_ftrace_events)) \
143 VMLINUX_SYMBOL(__stop_ftrace_events) = .; \
144 VMLINUX_SYMBOL(__start_ftrace_eval_maps) = .; \
145 KEEP(*(_ftrace_eval_map)) \
146 VMLINUX_SYMBOL(__stop_ftrace_eval_maps) = .;
147 #else
148 #define FTRACE_EVENTS()
149 #endif
150
151 #ifdef CONFIG_TRACING
152 #define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \
153 KEEP(*(__trace_printk_fmt)) /* Trace_printk fmt' pointer */ \
154 VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .;
155 #define TRACEPOINT_STR() VMLINUX_SYMBOL(__start___tracepoint_str) = .; \
156 KEEP(*(__tracepoint_str)) /* Trace_printk fmt' pointer */ \
157 VMLINUX_SYMBOL(__stop___tracepoint_str) = .;
158 #else
159 #define TRACE_PRINTKS()
160 #define TRACEPOINT_STR()
161 #endif
162
163 #ifdef CONFIG_FTRACE_SYSCALLS
164 #define TRACE_SYSCALLS() . = ALIGN(8); \
165 VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \
166 KEEP(*(__syscalls_metadata)) \
167 VMLINUX_SYMBOL(__stop_syscalls_metadata) = .;
168 #else
169 #define TRACE_SYSCALLS()
170 #endif
171
172 #ifdef CONFIG_SERIAL_EARLYCON
173 #define EARLYCON_TABLE() STRUCT_ALIGN(); \
174 VMLINUX_SYMBOL(__earlycon_table) = .; \
175 KEEP(*(__earlycon_table)) \
176 VMLINUX_SYMBOL(__earlycon_table_end) = .;
177 #else
178 #define EARLYCON_TABLE()
179 #endif
180
181 #define ___OF_TABLE(cfg, name) _OF_TABLE_##cfg(name)
182 #define __OF_TABLE(cfg, name) ___OF_TABLE(cfg, name)
183 #define OF_TABLE(cfg, name) __OF_TABLE(IS_ENABLED(cfg), name)
184 #define _OF_TABLE_0(name)
185 #define _OF_TABLE_1(name) \
186 . = ALIGN(8); \
187 VMLINUX_SYMBOL(__##name##_of_table) = .; \
188 KEEP(*(__##name##_of_table)) \
189 KEEP(*(__##name##_of_table_end))
190
191 #define TIMER_OF_TABLES() OF_TABLE(CONFIG_TIMER_OF, timer)
192 #define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip)
193 #define CLK_OF_TABLES() OF_TABLE(CONFIG_COMMON_CLK, clk)
194 #define IOMMU_OF_TABLES() OF_TABLE(CONFIG_OF_IOMMU, iommu)
195 #define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem)
196 #define CPU_METHOD_OF_TABLES() OF_TABLE(CONFIG_SMP, cpu_method)
197 #define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method)
198
199 #ifdef CONFIG_ACPI
200 #define ACPI_PROBE_TABLE(name) \
201 . = ALIGN(8); \
202 VMLINUX_SYMBOL(__##name##_acpi_probe_table) = .; \
203 KEEP(*(__##name##_acpi_probe_table)) \
204 VMLINUX_SYMBOL(__##name##_acpi_probe_table_end) = .;
205 #else
206 #define ACPI_PROBE_TABLE(name)
207 #endif
208
209 #define KERNEL_DTB() \
210 STRUCT_ALIGN(); \
211 VMLINUX_SYMBOL(__dtb_start) = .; \
212 KEEP(*(.dtb.init.rodata)) \
213 VMLINUX_SYMBOL(__dtb_end) = .;
214
215 /*
216 * .data section
217 */
218 #define DATA_DATA \
219 *(DATA_MAIN) \
220 *(.ref.data) \
221 *(.data..shared_aligned) /* percpu related */ \
222 MEM_KEEP(init.data) \
223 MEM_KEEP(exit.data) \
224 *(.data.unlikely) \
225 STRUCT_ALIGN(); \
226 *(__tracepoints) \
227 /* implement dynamic printk debug */ \
228 . = ALIGN(8); \
229 VMLINUX_SYMBOL(__start___jump_table) = .; \
230 KEEP(*(__jump_table)) \
231 VMLINUX_SYMBOL(__stop___jump_table) = .; \
232 . = ALIGN(8); \
233 VMLINUX_SYMBOL(__start___verbose) = .; \
234 KEEP(*(__verbose)) \
235 VMLINUX_SYMBOL(__stop___verbose) = .; \
236 LIKELY_PROFILE() \
237 BRANCH_PROFILE() \
238 TRACE_PRINTKS() \
239 TRACEPOINT_STR()
240
241 /*
242 * Data section helpers
243 */
244 #define NOSAVE_DATA \
245 . = ALIGN(PAGE_SIZE); \
246 VMLINUX_SYMBOL(__nosave_begin) = .; \
247 *(.data..nosave) \
248 . = ALIGN(PAGE_SIZE); \
249 VMLINUX_SYMBOL(__nosave_end) = .;
250
251 #define PAGE_ALIGNED_DATA(page_align) \
252 . = ALIGN(page_align); \
253 *(.data..page_aligned)
254
255 #define READ_MOSTLY_DATA(align) \
256 . = ALIGN(align); \
257 *(.data..read_mostly) \
258 . = ALIGN(align);
259
260 #define CACHELINE_ALIGNED_DATA(align) \
261 . = ALIGN(align); \
262 *(.data..cacheline_aligned)
263
264 #define INIT_TASK_DATA(align) \
265 . = ALIGN(align); \
266 VMLINUX_SYMBOL(__start_init_task) = .; \
267 *(.data..init_task) \
268 VMLINUX_SYMBOL(__end_init_task) = .;
269
270 /*
271 * Allow architectures to handle ro_after_init data on their
272 * own by defining an empty RO_AFTER_INIT_DATA.
273 */
274 #ifndef RO_AFTER_INIT_DATA
275 #define RO_AFTER_INIT_DATA \
276 VMLINUX_SYMBOL(__start_ro_after_init) = .; \
277 *(.data..ro_after_init) \
278 VMLINUX_SYMBOL(__end_ro_after_init) = .;
279 #endif
280
281 /*
282 * Read only Data
283 */
284 #define RO_DATA_SECTION(align) \
285 . = ALIGN((align)); \
286 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \
287 VMLINUX_SYMBOL(__start_rodata) = .; \
288 *(.rodata) *(.rodata.*) \
289 RO_AFTER_INIT_DATA /* Read only after init */ \
290 KEEP(*(__vermagic)) /* Kernel version magic */ \
291 . = ALIGN(8); \
292 VMLINUX_SYMBOL(__start___tracepoints_ptrs) = .; \
293 KEEP(*(__tracepoints_ptrs)) /* Tracepoints: pointer array */ \
294 VMLINUX_SYMBOL(__stop___tracepoints_ptrs) = .; \
295 *(__tracepoints_strings)/* Tracepoints: strings */ \
296 } \
297 \
298 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \
299 *(.rodata1) \
300 } \
301 \
302 /* PCI quirks */ \
303 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \
304 VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \
305 KEEP(*(.pci_fixup_early)) \
306 VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \
307 VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \
308 KEEP(*(.pci_fixup_header)) \
309 VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \
310 VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \
311 KEEP(*(.pci_fixup_final)) \
312 VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \
313 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \
314 KEEP(*(.pci_fixup_enable)) \
315 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \
316 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \
317 KEEP(*(.pci_fixup_resume)) \
318 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \
319 VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \
320 KEEP(*(.pci_fixup_resume_early)) \
321 VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \
322 VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \
323 KEEP(*(.pci_fixup_suspend)) \
324 VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \
325 VMLINUX_SYMBOL(__start_pci_fixups_suspend_late) = .; \
326 KEEP(*(.pci_fixup_suspend_late)) \
327 VMLINUX_SYMBOL(__end_pci_fixups_suspend_late) = .; \
328 } \
329 \
330 /* Built-in firmware blobs */ \
331 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \
332 VMLINUX_SYMBOL(__start_builtin_fw) = .; \
333 KEEP(*(.builtin_fw)) \
334 VMLINUX_SYMBOL(__end_builtin_fw) = .; \
335 } \
336 \
337 TRACEDATA \
338 \
339 /* Kernel symbol table: Normal symbols */ \
340 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \
341 VMLINUX_SYMBOL(__start___ksymtab) = .; \
342 KEEP(*(SORT(___ksymtab+*))) \
343 VMLINUX_SYMBOL(__stop___ksymtab) = .; \
344 } \
345 \
346 /* Kernel symbol table: GPL-only symbols */ \
347 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \
348 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \
349 KEEP(*(SORT(___ksymtab_gpl+*))) \
350 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \
351 } \
352 \
353 /* Kernel symbol table: Normal unused symbols */ \
354 __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \
355 VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \
356 KEEP(*(SORT(___ksymtab_unused+*))) \
357 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \
358 } \
359 \
360 /* Kernel symbol table: GPL-only unused symbols */ \
361 __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
362 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \
363 KEEP(*(SORT(___ksymtab_unused_gpl+*))) \
364 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \
365 } \
366 \
367 /* Kernel symbol table: GPL-future-only symbols */ \
368 __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
369 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \
370 KEEP(*(SORT(___ksymtab_gpl_future+*))) \
371 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \
372 } \
373 \
374 /* Kernel symbol table: Normal symbols */ \
375 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \
376 VMLINUX_SYMBOL(__start___kcrctab) = .; \
377 KEEP(*(SORT(___kcrctab+*))) \
378 VMLINUX_SYMBOL(__stop___kcrctab) = .; \
379 } \
380 \
381 /* Kernel symbol table: GPL-only symbols */ \
382 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \
383 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \
384 KEEP(*(SORT(___kcrctab_gpl+*))) \
385 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \
386 } \
387 \
388 /* Kernel symbol table: Normal unused symbols */ \
389 __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \
390 VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \
391 KEEP(*(SORT(___kcrctab_unused+*))) \
392 VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \
393 } \
394 \
395 /* Kernel symbol table: GPL-only unused symbols */ \
396 __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
397 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \
398 KEEP(*(SORT(___kcrctab_unused_gpl+*))) \
399 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \
400 } \
401 \
402 /* Kernel symbol table: GPL-future-only symbols */ \
403 __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
404 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \
405 KEEP(*(SORT(___kcrctab_gpl_future+*))) \
406 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \
407 } \
408 \
409 /* Kernel symbol table: strings */ \
410 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
411 *(__ksymtab_strings) \
412 } \
413 \
414 /* __*init sections */ \
415 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \
416 *(.ref.rodata) \
417 MEM_KEEP(init.rodata) \
418 MEM_KEEP(exit.rodata) \
419 } \
420 \
421 /* Built-in module parameters. */ \
422 __param : AT(ADDR(__param) - LOAD_OFFSET) { \
423 VMLINUX_SYMBOL(__start___param) = .; \
424 KEEP(*(__param)) \
425 VMLINUX_SYMBOL(__stop___param) = .; \
426 } \
427 \
428 /* Built-in module versions. */ \
429 __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \
430 VMLINUX_SYMBOL(__start___modver) = .; \
431 KEEP(*(__modver)) \
432 VMLINUX_SYMBOL(__stop___modver) = .; \
433 . = ALIGN((align)); \
434 VMLINUX_SYMBOL(__end_rodata) = .; \
435 } \
436 . = ALIGN((align));
437
438 /* RODATA & RO_DATA provided for backward compatibility.
439 * All archs are supposed to use RO_DATA() */
440 #define RODATA RO_DATA_SECTION(4096)
441 #define RO_DATA(align) RO_DATA_SECTION(align)
442
443 #define SECURITY_INIT \
444 .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
445 VMLINUX_SYMBOL(__security_initcall_start) = .; \
446 KEEP(*(.security_initcall.init)) \
447 VMLINUX_SYMBOL(__security_initcall_end) = .; \
448 }
449
450 /*
451 * .text section. Map to function alignment to avoid address changes
452 * during second ld run in second ld pass when generating System.map
453 *
454 * TEXT_MAIN here will match .text.fixup and .text.unlikely if dead
455 * code elimination is enabled, so these sections should be converted
456 * to use ".." first.
457 */
458 #define TEXT_TEXT \
459 ALIGN_FUNCTION(); \
460 *(.text.hot TEXT_MAIN .text.fixup .text.unlikely) \
461 *(.ref.text) \
462 MEM_KEEP(init.text) \
463 MEM_KEEP(exit.text) \
464
465
466 /* sched.text is aling to function alignment to secure we have same
467 * address even at second ld pass when generating System.map */
468 #define SCHED_TEXT \
469 ALIGN_FUNCTION(); \
470 VMLINUX_SYMBOL(__sched_text_start) = .; \
471 *(.sched.text) \
472 VMLINUX_SYMBOL(__sched_text_end) = .;
473
474 /* spinlock.text is aling to function alignment to secure we have same
475 * address even at second ld pass when generating System.map */
476 #define LOCK_TEXT \
477 ALIGN_FUNCTION(); \
478 VMLINUX_SYMBOL(__lock_text_start) = .; \
479 *(.spinlock.text) \
480 VMLINUX_SYMBOL(__lock_text_end) = .;
481
482 #define CPUIDLE_TEXT \
483 ALIGN_FUNCTION(); \
484 VMLINUX_SYMBOL(__cpuidle_text_start) = .; \
485 *(.cpuidle.text) \
486 VMLINUX_SYMBOL(__cpuidle_text_end) = .;
487
488 #define KPROBES_TEXT \
489 ALIGN_FUNCTION(); \
490 VMLINUX_SYMBOL(__kprobes_text_start) = .; \
491 *(.kprobes.text) \
492 VMLINUX_SYMBOL(__kprobes_text_end) = .;
493
494 #define ENTRY_TEXT \
495 ALIGN_FUNCTION(); \
496 VMLINUX_SYMBOL(__entry_text_start) = .; \
497 *(.entry.text) \
498 VMLINUX_SYMBOL(__entry_text_end) = .;
499
500 #if defined(CONFIG_FUNCTION_GRAPH_TRACER) || defined(CONFIG_KASAN)
501 #define IRQENTRY_TEXT \
502 ALIGN_FUNCTION(); \
503 VMLINUX_SYMBOL(__irqentry_text_start) = .; \
504 *(.irqentry.text) \
505 VMLINUX_SYMBOL(__irqentry_text_end) = .;
506 #else
507 #define IRQENTRY_TEXT
508 #endif
509
510 #if defined(CONFIG_FUNCTION_GRAPH_TRACER) || defined(CONFIG_KASAN)
511 #define SOFTIRQENTRY_TEXT \
512 ALIGN_FUNCTION(); \
513 VMLINUX_SYMBOL(__softirqentry_text_start) = .; \
514 *(.softirqentry.text) \
515 VMLINUX_SYMBOL(__softirqentry_text_end) = .;
516 #else
517 #define SOFTIRQENTRY_TEXT
518 #endif
519
520 /* Section used for early init (in .S files) */
521 #define HEAD_TEXT *(.head.text)
522
523 #define HEAD_TEXT_SECTION \
524 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \
525 HEAD_TEXT \
526 }
527
528 /*
529 * Exception table
530 */
531 #define EXCEPTION_TABLE(align) \
532 . = ALIGN(align); \
533 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \
534 VMLINUX_SYMBOL(__start___ex_table) = .; \
535 KEEP(*(__ex_table)) \
536 VMLINUX_SYMBOL(__stop___ex_table) = .; \
537 }
538
539 /*
540 * Init task
541 */
542 #define INIT_TASK_DATA_SECTION(align) \
543 . = ALIGN(align); \
544 .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \
545 INIT_TASK_DATA(align) \
546 }
547
548 #ifdef CONFIG_CONSTRUCTORS
549 #define KERNEL_CTORS() . = ALIGN(8); \
550 VMLINUX_SYMBOL(__ctors_start) = .; \
551 KEEP(*(.ctors)) \
552 KEEP(*(SORT(.init_array.*))) \
553 KEEP(*(.init_array)) \
554 VMLINUX_SYMBOL(__ctors_end) = .;
555 #else
556 #define KERNEL_CTORS()
557 #endif
558
559 /* init and exit section handling */
560 #define INIT_DATA \
561 KEEP(*(SORT(___kentry+*))) \
562 *(.init.data) \
563 MEM_DISCARD(init.data) \
564 KERNEL_CTORS() \
565 MCOUNT_REC() \
566 *(.init.rodata) \
567 FTRACE_EVENTS() \
568 TRACE_SYSCALLS() \
569 KPROBE_BLACKLIST() \
570 MEM_DISCARD(init.rodata) \
571 CLK_OF_TABLES() \
572 RESERVEDMEM_OF_TABLES() \
573 TIMER_OF_TABLES() \
574 IOMMU_OF_TABLES() \
575 CPU_METHOD_OF_TABLES() \
576 CPUIDLE_METHOD_OF_TABLES() \
577 KERNEL_DTB() \
578 IRQCHIP_OF_MATCH_TABLE() \
579 ACPI_PROBE_TABLE(irqchip) \
580 ACPI_PROBE_TABLE(timer) \
581 ACPI_PROBE_TABLE(iort) \
582 EARLYCON_TABLE()
583
584 #define INIT_TEXT \
585 *(.init.text) \
586 *(.text.startup) \
587 MEM_DISCARD(init.text)
588
589 #define EXIT_DATA \
590 *(.exit.data) \
591 *(.fini_array) \
592 *(.dtors) \
593 MEM_DISCARD(exit.data) \
594 MEM_DISCARD(exit.rodata)
595
596 #define EXIT_TEXT \
597 *(.exit.text) \
598 *(.text.exit) \
599 MEM_DISCARD(exit.text)
600
601 #define EXIT_CALL \
602 *(.exitcall.exit)
603
604 /*
605 * bss (Block Started by Symbol) - uninitialized data
606 * zeroed during startup
607 */
608 #define SBSS(sbss_align) \
609 . = ALIGN(sbss_align); \
610 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \
611 *(.dynsbss) \
612 *(.sbss) \
613 *(.scommon) \
614 }
615
616 /*
617 * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra
618 * sections to the front of bss.
619 */
620 #ifndef BSS_FIRST_SECTIONS
621 #define BSS_FIRST_SECTIONS
622 #endif
623
624 #define BSS(bss_align) \
625 . = ALIGN(bss_align); \
626 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \
627 BSS_FIRST_SECTIONS \
628 *(.bss..page_aligned) \
629 *(.dynbss) \
630 *(BSS_MAIN) \
631 *(COMMON) \
632 }
633
634 /*
635 * DWARF debug sections.
636 * Symbols in the DWARF debugging sections are relative to
637 * the beginning of the section so we begin them at 0.
638 */
639 #define DWARF_DEBUG \
640 /* DWARF 1 */ \
641 .debug 0 : { *(.debug) } \
642 .line 0 : { *(.line) } \
643 /* GNU DWARF 1 extensions */ \
644 .debug_srcinfo 0 : { *(.debug_srcinfo) } \
645 .debug_sfnames 0 : { *(.debug_sfnames) } \
646 /* DWARF 1.1 and DWARF 2 */ \
647 .debug_aranges 0 : { *(.debug_aranges) } \
648 .debug_pubnames 0 : { *(.debug_pubnames) } \
649 /* DWARF 2 */ \
650 .debug_info 0 : { *(.debug_info \
651 .gnu.linkonce.wi.*) } \
652 .debug_abbrev 0 : { *(.debug_abbrev) } \
653 .debug_line 0 : { *(.debug_line) } \
654 .debug_frame 0 : { *(.debug_frame) } \
655 .debug_str 0 : { *(.debug_str) } \
656 .debug_loc 0 : { *(.debug_loc) } \
657 .debug_macinfo 0 : { *(.debug_macinfo) } \
658 .debug_pubtypes 0 : { *(.debug_pubtypes) } \
659 /* DWARF 3 */ \
660 .debug_ranges 0 : { *(.debug_ranges) } \
661 /* SGI/MIPS DWARF 2 extensions */ \
662 .debug_weaknames 0 : { *(.debug_weaknames) } \
663 .debug_funcnames 0 : { *(.debug_funcnames) } \
664 .debug_typenames 0 : { *(.debug_typenames) } \
665 .debug_varnames 0 : { *(.debug_varnames) } \
666 /* GNU DWARF 2 extensions */ \
667 .debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) } \
668 .debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) } \
669 /* DWARF 4 */ \
670 .debug_types 0 : { *(.debug_types) } \
671 /* DWARF 5 */ \
672 .debug_macro 0 : { *(.debug_macro) } \
673 .debug_addr 0 : { *(.debug_addr) }
674
675 /* Stabs debugging sections. */
676 #define STABS_DEBUG \
677 .stab 0 : { *(.stab) } \
678 .stabstr 0 : { *(.stabstr) } \
679 .stab.excl 0 : { *(.stab.excl) } \
680 .stab.exclstr 0 : { *(.stab.exclstr) } \
681 .stab.index 0 : { *(.stab.index) } \
682 .stab.indexstr 0 : { *(.stab.indexstr) } \
683 .comment 0 : { *(.comment) }
684
685 #ifdef CONFIG_GENERIC_BUG
686 #define BUG_TABLE \
687 . = ALIGN(8); \
688 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \
689 VMLINUX_SYMBOL(__start___bug_table) = .; \
690 KEEP(*(__bug_table)) \
691 VMLINUX_SYMBOL(__stop___bug_table) = .; \
692 }
693 #else
694 #define BUG_TABLE
695 #endif
696
697 #ifdef CONFIG_PM_TRACE
698 #define TRACEDATA \
699 . = ALIGN(4); \
700 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \
701 VMLINUX_SYMBOL(__tracedata_start) = .; \
702 KEEP(*(.tracedata)) \
703 VMLINUX_SYMBOL(__tracedata_end) = .; \
704 }
705 #else
706 #define TRACEDATA
707 #endif
708
709 #define NOTES \
710 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \
711 VMLINUX_SYMBOL(__start_notes) = .; \
712 *(.note.*) \
713 VMLINUX_SYMBOL(__stop_notes) = .; \
714 }
715
716 #define INIT_SETUP(initsetup_align) \
717 . = ALIGN(initsetup_align); \
718 VMLINUX_SYMBOL(__setup_start) = .; \
719 KEEP(*(.init.setup)) \
720 VMLINUX_SYMBOL(__setup_end) = .;
721
722 #define INIT_CALLS_LEVEL(level) \
723 VMLINUX_SYMBOL(__initcall##level##_start) = .; \
724 KEEP(*(.initcall##level##.init)) \
725 KEEP(*(.initcall##level##s.init)) \
726
727 #define INIT_CALLS \
728 VMLINUX_SYMBOL(__initcall_start) = .; \
729 KEEP(*(.initcallearly.init)) \
730 INIT_CALLS_LEVEL(0) \
731 INIT_CALLS_LEVEL(1) \
732 INIT_CALLS_LEVEL(2) \
733 INIT_CALLS_LEVEL(3) \
734 INIT_CALLS_LEVEL(4) \
735 INIT_CALLS_LEVEL(5) \
736 INIT_CALLS_LEVEL(rootfs) \
737 INIT_CALLS_LEVEL(6) \
738 INIT_CALLS_LEVEL(7) \
739 VMLINUX_SYMBOL(__initcall_end) = .;
740
741 #define CON_INITCALL \
742 VMLINUX_SYMBOL(__con_initcall_start) = .; \
743 KEEP(*(.con_initcall.init)) \
744 VMLINUX_SYMBOL(__con_initcall_end) = .;
745
746 #define SECURITY_INITCALL \
747 VMLINUX_SYMBOL(__security_initcall_start) = .; \
748 KEEP(*(.security_initcall.init)) \
749 VMLINUX_SYMBOL(__security_initcall_end) = .;
750
751 #ifdef CONFIG_BLK_DEV_INITRD
752 #define INIT_RAM_FS \
753 . = ALIGN(4); \
754 VMLINUX_SYMBOL(__initramfs_start) = .; \
755 KEEP(*(.init.ramfs)) \
756 . = ALIGN(8); \
757 KEEP(*(.init.ramfs.info))
758 #else
759 #define INIT_RAM_FS
760 #endif
761
762 /*
763 * Default discarded sections.
764 *
765 * Some archs want to discard exit text/data at runtime rather than
766 * link time due to cross-section references such as alt instructions,
767 * bug table, eh_frame, etc. DISCARDS must be the last of output
768 * section definitions so that such archs put those in earlier section
769 * definitions.
770 */
771 #define DISCARDS \
772 /DISCARD/ : { \
773 EXIT_TEXT \
774 EXIT_DATA \
775 EXIT_CALL \
776 *(.discard) \
777 *(.discard.*) \
778 }
779
780 /**
781 * PERCPU_INPUT - the percpu input sections
782 * @cacheline: cacheline size
783 *
784 * The core percpu section names and core symbols which do not rely
785 * directly upon load addresses.
786 *
787 * @cacheline is used to align subsections to avoid false cacheline
788 * sharing between subsections for different purposes.
789 */
790 #define PERCPU_INPUT(cacheline) \
791 VMLINUX_SYMBOL(__per_cpu_start) = .; \
792 *(.data..percpu..first) \
793 . = ALIGN(PAGE_SIZE); \
794 *(.data..percpu..page_aligned) \
795 . = ALIGN(cacheline); \
796 *(.data..percpu..read_mostly) \
797 . = ALIGN(cacheline); \
798 *(.data..percpu) \
799 *(.data..percpu..shared_aligned) \
800 VMLINUX_SYMBOL(__per_cpu_end) = .;
801
802 /**
803 * PERCPU_VADDR - define output section for percpu area
804 * @cacheline: cacheline size
805 * @vaddr: explicit base address (optional)
806 * @phdr: destination PHDR (optional)
807 *
808 * Macro which expands to output section for percpu area.
809 *
810 * @cacheline is used to align subsections to avoid false cacheline
811 * sharing between subsections for different purposes.
812 *
813 * If @vaddr is not blank, it specifies explicit base address and all
814 * percpu symbols will be offset from the given address. If blank,
815 * @vaddr always equals @laddr + LOAD_OFFSET.
816 *
817 * @phdr defines the output PHDR to use if not blank. Be warned that
818 * output PHDR is sticky. If @phdr is specified, the next output
819 * section in the linker script will go there too. @phdr should have
820 * a leading colon.
821 *
822 * Note that this macros defines __per_cpu_load as an absolute symbol.
823 * If there is no need to put the percpu section at a predetermined
824 * address, use PERCPU_SECTION.
825 */
826 #define PERCPU_VADDR(cacheline, vaddr, phdr) \
827 VMLINUX_SYMBOL(__per_cpu_load) = .; \
828 .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \
829 - LOAD_OFFSET) { \
830 PERCPU_INPUT(cacheline) \
831 } phdr \
832 . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu);
833
834 /**
835 * PERCPU_SECTION - define output section for percpu area, simple version
836 * @cacheline: cacheline size
837 *
838 * Align to PAGE_SIZE and outputs output section for percpu area. This
839 * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and
840 * __per_cpu_start will be identical.
841 *
842 * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,)
843 * except that __per_cpu_load is defined as a relative symbol against
844 * .data..percpu which is required for relocatable x86_32 configuration.
845 */
846 #define PERCPU_SECTION(cacheline) \
847 . = ALIGN(PAGE_SIZE); \
848 .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \
849 VMLINUX_SYMBOL(__per_cpu_load) = .; \
850 PERCPU_INPUT(cacheline) \
851 }
852
853
854 /*
855 * Definition of the high level *_SECTION macros
856 * They will fit only a subset of the architectures
857 */
858
859
860 /*
861 * Writeable data.
862 * All sections are combined in a single .data section.
863 * The sections following CONSTRUCTORS are arranged so their
864 * typical alignment matches.
865 * A cacheline is typical/always less than a PAGE_SIZE so
866 * the sections that has this restriction (or similar)
867 * is located before the ones requiring PAGE_SIZE alignment.
868 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
869 * matches the requirement of PAGE_ALIGNED_DATA.
870 *
871 * use 0 as page_align if page_aligned data is not used */
872 #define RW_DATA_SECTION(cacheline, pagealigned, inittask) \
873 . = ALIGN(PAGE_SIZE); \
874 .data : AT(ADDR(.data) - LOAD_OFFSET) { \
875 INIT_TASK_DATA(inittask) \
876 NOSAVE_DATA \
877 PAGE_ALIGNED_DATA(pagealigned) \
878 CACHELINE_ALIGNED_DATA(cacheline) \
879 READ_MOSTLY_DATA(cacheline) \
880 DATA_DATA \
881 CONSTRUCTORS \
882 } \
883 BUG_TABLE
884
885 #define INIT_TEXT_SECTION(inittext_align) \
886 . = ALIGN(inittext_align); \
887 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \
888 VMLINUX_SYMBOL(_sinittext) = .; \
889 INIT_TEXT \
890 VMLINUX_SYMBOL(_einittext) = .; \
891 }
892
893 #define INIT_DATA_SECTION(initsetup_align) \
894 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \
895 INIT_DATA \
896 INIT_SETUP(initsetup_align) \
897 INIT_CALLS \
898 CON_INITCALL \
899 SECURITY_INITCALL \
900 INIT_RAM_FS \
901 }
902
903 #define BSS_SECTION(sbss_align, bss_align, stop_align) \
904 . = ALIGN(sbss_align); \
905 VMLINUX_SYMBOL(__bss_start) = .; \
906 SBSS(sbss_align) \
907 BSS(bss_align) \
908 . = ALIGN(stop_align); \
909 VMLINUX_SYMBOL(__bss_stop) = .;
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