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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/* Align . to a 8 byte boundary equals to maximum function alignment. */
58#define ALIGN_FUNCTION() . = ALIGN(8)
59
60/*
61 * LD_DEAD_CODE_DATA_ELIMINATION option enables -fdata-sections, which
62 * generates .data.identifier sections, which need to be pulled in with
63 * .data. We don't want to pull in .data..other sections, which Linux
64 * has defined. Same for text and bss.
65 *
66 * RODATA_MAIN is not used because existing code already defines .rodata.x
67 * sections to be brought in with rodata.
68 */
69#ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
70#define TEXT_MAIN .text .text.[0-9a-zA-Z_]*
71#define DATA_MAIN .data .data.[0-9a-zA-Z_]* .data..LPBX*
72#define SDATA_MAIN .sdata .sdata.[0-9a-zA-Z_]*
73#define RODATA_MAIN .rodata .rodata.[0-9a-zA-Z_]*
74#define BSS_MAIN .bss .bss.[0-9a-zA-Z_]*
75#define SBSS_MAIN .sbss .sbss.[0-9a-zA-Z_]*
76#else
77#define TEXT_MAIN .text
78#define DATA_MAIN .data
79#define SDATA_MAIN .sdata
80#define RODATA_MAIN .rodata
81#define BSS_MAIN .bss
82#define SBSS_MAIN .sbss
83#endif
84
85/*
86 * Align to a 32 byte boundary equal to the
87 * alignment gcc 4.5 uses for a struct
88 */
89#define STRUCT_ALIGNMENT 32
90#define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT)
91
92/* The actual configuration determine if the init/exit sections
93 * are handled as text/data or they can be discarded (which
94 * often happens at runtime)
95 */
96#ifdef CONFIG_HOTPLUG_CPU
97#define CPU_KEEP(sec) *(.cpu##sec)
98#define CPU_DISCARD(sec)
99#else
100#define CPU_KEEP(sec)
101#define CPU_DISCARD(sec) *(.cpu##sec)
102#endif
103
104#if defined(CONFIG_MEMORY_HOTPLUG)
105#define MEM_KEEP(sec) *(.mem##sec)
106#define MEM_DISCARD(sec)
107#else
108#define MEM_KEEP(sec)
109#define MEM_DISCARD(sec) *(.mem##sec)
110#endif
111
112#ifdef CONFIG_FTRACE_MCOUNT_RECORD
113#ifdef CC_USING_PATCHABLE_FUNCTION_ENTRY
114#define MCOUNT_REC() . = ALIGN(8); \
115 __start_mcount_loc = .; \
116 KEEP(*(__patchable_function_entries)) \
117 __stop_mcount_loc = .;
118#else
119#define MCOUNT_REC() . = ALIGN(8); \
120 __start_mcount_loc = .; \
121 KEEP(*(__mcount_loc)) \
122 __stop_mcount_loc = .;
123#endif
124#else
125#define MCOUNT_REC()
126#endif
127
128#ifdef CONFIG_TRACE_BRANCH_PROFILING
129#define LIKELY_PROFILE() __start_annotated_branch_profile = .; \
130 KEEP(*(_ftrace_annotated_branch)) \
131 __stop_annotated_branch_profile = .;
132#else
133#define LIKELY_PROFILE()
134#endif
135
136#ifdef CONFIG_PROFILE_ALL_BRANCHES
137#define BRANCH_PROFILE() __start_branch_profile = .; \
138 KEEP(*(_ftrace_branch)) \
139 __stop_branch_profile = .;
140#else
141#define BRANCH_PROFILE()
142#endif
143
144#ifdef CONFIG_KPROBES
145#define KPROBE_BLACKLIST() . = ALIGN(8); \
146 __start_kprobe_blacklist = .; \
147 KEEP(*(_kprobe_blacklist)) \
148 __stop_kprobe_blacklist = .;
149#else
150#define KPROBE_BLACKLIST()
151#endif
152
153#ifdef CONFIG_FUNCTION_ERROR_INJECTION
154#define ERROR_INJECT_WHITELIST() STRUCT_ALIGN(); \
155 __start_error_injection_whitelist = .; \
156 KEEP(*(_error_injection_whitelist)) \
157 __stop_error_injection_whitelist = .;
158#else
159#define ERROR_INJECT_WHITELIST()
160#endif
161
162#ifdef CONFIG_EVENT_TRACING
163#define FTRACE_EVENTS() . = ALIGN(8); \
164 __start_ftrace_events = .; \
165 KEEP(*(_ftrace_events)) \
166 __stop_ftrace_events = .; \
167 __start_ftrace_eval_maps = .; \
168 KEEP(*(_ftrace_eval_map)) \
169 __stop_ftrace_eval_maps = .;
170#else
171#define FTRACE_EVENTS()
172#endif
173
174#ifdef CONFIG_TRACING
175#define TRACE_PRINTKS() __start___trace_bprintk_fmt = .; \
176 KEEP(*(__trace_printk_fmt)) /* Trace_printk fmt' pointer */ \
177 __stop___trace_bprintk_fmt = .;
178#define TRACEPOINT_STR() __start___tracepoint_str = .; \
179 KEEP(*(__tracepoint_str)) /* Trace_printk fmt' pointer */ \
180 __stop___tracepoint_str = .;
181#else
182#define TRACE_PRINTKS()
183#define TRACEPOINT_STR()
184#endif
185
186#ifdef CONFIG_FTRACE_SYSCALLS
187#define TRACE_SYSCALLS() . = ALIGN(8); \
188 __start_syscalls_metadata = .; \
189 KEEP(*(__syscalls_metadata)) \
190 __stop_syscalls_metadata = .;
191#else
192#define TRACE_SYSCALLS()
193#endif
194
195#ifdef CONFIG_BPF_EVENTS
196#define BPF_RAW_TP() STRUCT_ALIGN(); \
197 __start__bpf_raw_tp = .; \
198 KEEP(*(__bpf_raw_tp_map)) \
199 __stop__bpf_raw_tp = .;
200#else
201#define BPF_RAW_TP()
202#endif
203
204#ifdef CONFIG_SERIAL_EARLYCON
205#define EARLYCON_TABLE() . = ALIGN(8); \
206 __earlycon_table = .; \
207 KEEP(*(__earlycon_table)) \
208 __earlycon_table_end = .;
209#else
210#define EARLYCON_TABLE()
211#endif
212
213#ifdef CONFIG_SECURITY
214#define LSM_TABLE() . = ALIGN(8); \
215 __start_lsm_info = .; \
216 KEEP(*(.lsm_info.init)) \
217 __end_lsm_info = .;
218#define EARLY_LSM_TABLE() . = ALIGN(8); \
219 __start_early_lsm_info = .; \
220 KEEP(*(.early_lsm_info.init)) \
221 __end_early_lsm_info = .;
222#else
223#define LSM_TABLE()
224#define EARLY_LSM_TABLE()
225#endif
226
227#define ___OF_TABLE(cfg, name) _OF_TABLE_##cfg(name)
228#define __OF_TABLE(cfg, name) ___OF_TABLE(cfg, name)
229#define OF_TABLE(cfg, name) __OF_TABLE(IS_ENABLED(cfg), name)
230#define _OF_TABLE_0(name)
231#define _OF_TABLE_1(name) \
232 . = ALIGN(8); \
233 __##name##_of_table = .; \
234 KEEP(*(__##name##_of_table)) \
235 KEEP(*(__##name##_of_table_end))
236
237#define TIMER_OF_TABLES() OF_TABLE(CONFIG_TIMER_OF, timer)
238#define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip)
239#define CLK_OF_TABLES() OF_TABLE(CONFIG_COMMON_CLK, clk)
240#define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem)
241#define CPU_METHOD_OF_TABLES() OF_TABLE(CONFIG_SMP, cpu_method)
242#define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method)
243
244#ifdef CONFIG_ACPI
245#define ACPI_PROBE_TABLE(name) \
246 . = ALIGN(8); \
247 __##name##_acpi_probe_table = .; \
248 KEEP(*(__##name##_acpi_probe_table)) \
249 __##name##_acpi_probe_table_end = .;
250#else
251#define ACPI_PROBE_TABLE(name)
252#endif
253
254#ifdef CONFIG_THERMAL
255#define THERMAL_TABLE(name) \
256 . = ALIGN(8); \
257 __##name##_thermal_table = .; \
258 KEEP(*(__##name##_thermal_table)) \
259 __##name##_thermal_table_end = .;
260#else
261#define THERMAL_TABLE(name)
262#endif
263
264#define KERNEL_DTB() \
265 STRUCT_ALIGN(); \
266 __dtb_start = .; \
267 KEEP(*(.dtb.init.rodata)) \
268 __dtb_end = .;
269
270/*
271 * .data section
272 */
273#define DATA_DATA \
274 *(.xiptext) \
275 *(DATA_MAIN) \
276 *(.ref.data) \
277 *(.data..shared_aligned) /* percpu related */ \
278 MEM_KEEP(init.data*) \
279 MEM_KEEP(exit.data*) \
280 *(.data.unlikely) \
281 __start_once = .; \
282 *(.data.once) \
283 __end_once = .; \
284 STRUCT_ALIGN(); \
285 *(__tracepoints) \
286 /* implement dynamic printk debug */ \
287 . = ALIGN(8); \
288 __start___verbose = .; \
289 KEEP(*(__verbose)) \
290 __stop___verbose = .; \
291 LIKELY_PROFILE() \
292 BRANCH_PROFILE() \
293 TRACE_PRINTKS() \
294 BPF_RAW_TP() \
295 TRACEPOINT_STR()
296
297/*
298 * Data section helpers
299 */
300#define NOSAVE_DATA \
301 . = ALIGN(PAGE_SIZE); \
302 __nosave_begin = .; \
303 *(.data..nosave) \
304 . = ALIGN(PAGE_SIZE); \
305 __nosave_end = .;
306
307#define PAGE_ALIGNED_DATA(page_align) \
308 . = ALIGN(page_align); \
309 *(.data..page_aligned)
310
311#define READ_MOSTLY_DATA(align) \
312 . = ALIGN(align); \
313 *(.data..read_mostly) \
314 . = ALIGN(align);
315
316#define CACHELINE_ALIGNED_DATA(align) \
317 . = ALIGN(align); \
318 *(.data..cacheline_aligned)
319
320#define INIT_TASK_DATA(align) \
321 . = ALIGN(align); \
322 __start_init_task = .; \
323 init_thread_union = .; \
324 init_stack = .; \
325 KEEP(*(.data..init_task)) \
326 KEEP(*(.data..init_thread_info)) \
327 . = __start_init_task + THREAD_SIZE; \
328 __end_init_task = .;
329
330#define JUMP_TABLE_DATA \
331 . = ALIGN(8); \
332 __start___jump_table = .; \
333 KEEP(*(__jump_table)) \
334 __stop___jump_table = .;
335
336/*
337 * Allow architectures to handle ro_after_init data on their
338 * own by defining an empty RO_AFTER_INIT_DATA.
339 */
340#ifndef RO_AFTER_INIT_DATA
341#define RO_AFTER_INIT_DATA \
342 __start_ro_after_init = .; \
343 *(.data..ro_after_init) \
344 JUMP_TABLE_DATA \
345 __end_ro_after_init = .;
346#endif
347
348/*
349 * Read only Data
350 */
351#define RO_DATA_SECTION(align) \
352 . = ALIGN((align)); \
353 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \
354 __start_rodata = .; \
355 *(.rodata) *(.rodata.*) \
356 RO_AFTER_INIT_DATA /* Read only after init */ \
357 . = ALIGN(8); \
358 __start___tracepoints_ptrs = .; \
359 KEEP(*(__tracepoints_ptrs)) /* Tracepoints: pointer array */ \
360 __stop___tracepoints_ptrs = .; \
361 *(__tracepoints_strings)/* Tracepoints: strings */ \
362 } \
363 \
364 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \
365 *(.rodata1) \
366 } \
367 \
368 /* PCI quirks */ \
369 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \
370 __start_pci_fixups_early = .; \
371 KEEP(*(.pci_fixup_early)) \
372 __end_pci_fixups_early = .; \
373 __start_pci_fixups_header = .; \
374 KEEP(*(.pci_fixup_header)) \
375 __end_pci_fixups_header = .; \
376 __start_pci_fixups_final = .; \
377 KEEP(*(.pci_fixup_final)) \
378 __end_pci_fixups_final = .; \
379 __start_pci_fixups_enable = .; \
380 KEEP(*(.pci_fixup_enable)) \
381 __end_pci_fixups_enable = .; \
382 __start_pci_fixups_resume = .; \
383 KEEP(*(.pci_fixup_resume)) \
384 __end_pci_fixups_resume = .; \
385 __start_pci_fixups_resume_early = .; \
386 KEEP(*(.pci_fixup_resume_early)) \
387 __end_pci_fixups_resume_early = .; \
388 __start_pci_fixups_suspend = .; \
389 KEEP(*(.pci_fixup_suspend)) \
390 __end_pci_fixups_suspend = .; \
391 __start_pci_fixups_suspend_late = .; \
392 KEEP(*(.pci_fixup_suspend_late)) \
393 __end_pci_fixups_suspend_late = .; \
394 } \
395 \
396 /* Built-in firmware blobs */ \
397 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \
398 __start_builtin_fw = .; \
399 KEEP(*(.builtin_fw)) \
400 __end_builtin_fw = .; \
401 } \
402 \
403 TRACEDATA \
404 \
405 /* Kernel symbol table: Normal symbols */ \
406 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \
407 __start___ksymtab = .; \
408 KEEP(*(SORT(___ksymtab+*))) \
409 __stop___ksymtab = .; \
410 } \
411 \
412 /* Kernel symbol table: GPL-only symbols */ \
413 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \
414 __start___ksymtab_gpl = .; \
415 KEEP(*(SORT(___ksymtab_gpl+*))) \
416 __stop___ksymtab_gpl = .; \
417 } \
418 \
419 /* Kernel symbol table: Normal unused symbols */ \
420 __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \
421 __start___ksymtab_unused = .; \
422 KEEP(*(SORT(___ksymtab_unused+*))) \
423 __stop___ksymtab_unused = .; \
424 } \
425 \
426 /* Kernel symbol table: GPL-only unused symbols */ \
427 __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
428 __start___ksymtab_unused_gpl = .; \
429 KEEP(*(SORT(___ksymtab_unused_gpl+*))) \
430 __stop___ksymtab_unused_gpl = .; \
431 } \
432 \
433 /* Kernel symbol table: GPL-future-only symbols */ \
434 __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
435 __start___ksymtab_gpl_future = .; \
436 KEEP(*(SORT(___ksymtab_gpl_future+*))) \
437 __stop___ksymtab_gpl_future = .; \
438 } \
439 \
440 /* Kernel symbol table: Normal symbols */ \
441 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \
442 __start___kcrctab = .; \
443 KEEP(*(SORT(___kcrctab+*))) \
444 __stop___kcrctab = .; \
445 } \
446 \
447 /* Kernel symbol table: GPL-only symbols */ \
448 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \
449 __start___kcrctab_gpl = .; \
450 KEEP(*(SORT(___kcrctab_gpl+*))) \
451 __stop___kcrctab_gpl = .; \
452 } \
453 \
454 /* Kernel symbol table: Normal unused symbols */ \
455 __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \
456 __start___kcrctab_unused = .; \
457 KEEP(*(SORT(___kcrctab_unused+*))) \
458 __stop___kcrctab_unused = .; \
459 } \
460 \
461 /* Kernel symbol table: GPL-only unused symbols */ \
462 __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
463 __start___kcrctab_unused_gpl = .; \
464 KEEP(*(SORT(___kcrctab_unused_gpl+*))) \
465 __stop___kcrctab_unused_gpl = .; \
466 } \
467 \
468 /* Kernel symbol table: GPL-future-only symbols */ \
469 __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
470 __start___kcrctab_gpl_future = .; \
471 KEEP(*(SORT(___kcrctab_gpl_future+*))) \
472 __stop___kcrctab_gpl_future = .; \
473 } \
474 \
475 /* Kernel symbol table: strings */ \
476 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
477 *(__ksymtab_strings) \
478 } \
479 \
480 /* __*init sections */ \
481 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \
482 *(.ref.rodata) \
483 MEM_KEEP(init.rodata) \
484 MEM_KEEP(exit.rodata) \
485 } \
486 \
487 /* Built-in module parameters. */ \
488 __param : AT(ADDR(__param) - LOAD_OFFSET) { \
489 __start___param = .; \
490 KEEP(*(__param)) \
491 __stop___param = .; \
492 } \
493 \
494 /* Built-in module versions. */ \
495 __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \
496 __start___modver = .; \
497 KEEP(*(__modver)) \
498 __stop___modver = .; \
499 . = ALIGN((align)); \
500 __end_rodata = .; \
501 } \
502 . = ALIGN((align));
503
504/* RODATA & RO_DATA provided for backward compatibility.
505 * All archs are supposed to use RO_DATA() */
506#define RODATA RO_DATA_SECTION(4096)
507#define RO_DATA(align) RO_DATA_SECTION(align)
508
509/*
510 * .text section. Map to function alignment to avoid address changes
511 * during second ld run in second ld pass when generating System.map
512 *
513 * TEXT_MAIN here will match .text.fixup and .text.unlikely if dead
514 * code elimination is enabled, so these sections should be converted
515 * to use ".." first.
516 */
517#define TEXT_TEXT \
518 ALIGN_FUNCTION(); \
519 *(.text.hot TEXT_MAIN .text.fixup .text.unlikely) \
520 *(.text..refcount) \
521 *(.ref.text) \
522 MEM_KEEP(init.text*) \
523 MEM_KEEP(exit.text*) \
524
525
526/* sched.text is aling to function alignment to secure we have same
527 * address even at second ld pass when generating System.map */
528#define SCHED_TEXT \
529 ALIGN_FUNCTION(); \
530 __sched_text_start = .; \
531 *(.sched.text) \
532 __sched_text_end = .;
533
534/* spinlock.text is aling to function alignment to secure we have same
535 * address even at second ld pass when generating System.map */
536#define LOCK_TEXT \
537 ALIGN_FUNCTION(); \
538 __lock_text_start = .; \
539 *(.spinlock.text) \
540 __lock_text_end = .;
541
542#define CPUIDLE_TEXT \
543 ALIGN_FUNCTION(); \
544 __cpuidle_text_start = .; \
545 *(.cpuidle.text) \
546 __cpuidle_text_end = .;
547
548#define KPROBES_TEXT \
549 ALIGN_FUNCTION(); \
550 __kprobes_text_start = .; \
551 *(.kprobes.text) \
552 __kprobes_text_end = .;
553
554#define ENTRY_TEXT \
555 ALIGN_FUNCTION(); \
556 __entry_text_start = .; \
557 *(.entry.text) \
558 __entry_text_end = .;
559
560#define IRQENTRY_TEXT \
561 ALIGN_FUNCTION(); \
562 __irqentry_text_start = .; \
563 *(.irqentry.text) \
564 __irqentry_text_end = .;
565
566#define SOFTIRQENTRY_TEXT \
567 ALIGN_FUNCTION(); \
568 __softirqentry_text_start = .; \
569 *(.softirqentry.text) \
570 __softirqentry_text_end = .;
571
572/* Section used for early init (in .S files) */
573#define HEAD_TEXT KEEP(*(.head.text))
574
575#define HEAD_TEXT_SECTION \
576 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \
577 HEAD_TEXT \
578 }
579
580/*
581 * Exception table
582 */
583#define EXCEPTION_TABLE(align) \
584 . = ALIGN(align); \
585 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \
586 __start___ex_table = .; \
587 KEEP(*(__ex_table)) \
588 __stop___ex_table = .; \
589 }
590
591/*
592 * Init task
593 */
594#define INIT_TASK_DATA_SECTION(align) \
595 . = ALIGN(align); \
596 .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \
597 INIT_TASK_DATA(align) \
598 }
599
600#ifdef CONFIG_CONSTRUCTORS
601#define KERNEL_CTORS() . = ALIGN(8); \
602 __ctors_start = .; \
603 KEEP(*(.ctors)) \
604 KEEP(*(SORT(.init_array.*))) \
605 KEEP(*(.init_array)) \
606 __ctors_end = .;
607#else
608#define KERNEL_CTORS()
609#endif
610
611/* init and exit section handling */
612#define INIT_DATA \
613 KEEP(*(SORT(___kentry+*))) \
614 *(.init.data init.data.*) \
615 MEM_DISCARD(init.data*) \
616 KERNEL_CTORS() \
617 MCOUNT_REC() \
618 *(.init.rodata .init.rodata.*) \
619 FTRACE_EVENTS() \
620 TRACE_SYSCALLS() \
621 KPROBE_BLACKLIST() \
622 ERROR_INJECT_WHITELIST() \
623 MEM_DISCARD(init.rodata) \
624 CLK_OF_TABLES() \
625 RESERVEDMEM_OF_TABLES() \
626 TIMER_OF_TABLES() \
627 CPU_METHOD_OF_TABLES() \
628 CPUIDLE_METHOD_OF_TABLES() \
629 KERNEL_DTB() \
630 IRQCHIP_OF_MATCH_TABLE() \
631 ACPI_PROBE_TABLE(irqchip) \
632 ACPI_PROBE_TABLE(timer) \
633 THERMAL_TABLE(governor) \
634 EARLYCON_TABLE() \
635 LSM_TABLE() \
636 EARLY_LSM_TABLE()
637
638#define INIT_TEXT \
639 *(.init.text .init.text.*) \
640 *(.text.startup) \
641 MEM_DISCARD(init.text*)
642
643#define EXIT_DATA \
644 *(.exit.data .exit.data.*) \
645 *(.fini_array .fini_array.*) \
646 *(.dtors .dtors.*) \
647 MEM_DISCARD(exit.data*) \
648 MEM_DISCARD(exit.rodata*)
649
650#define EXIT_TEXT \
651 *(.exit.text) \
652 *(.text.exit) \
653 MEM_DISCARD(exit.text)
654
655#define EXIT_CALL \
656 *(.exitcall.exit)
657
658/*
659 * bss (Block Started by Symbol) - uninitialized data
660 * zeroed during startup
661 */
662#define SBSS(sbss_align) \
663 . = ALIGN(sbss_align); \
664 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \
665 *(.dynsbss) \
666 *(SBSS_MAIN) \
667 *(.scommon) \
668 }
669
670/*
671 * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra
672 * sections to the front of bss.
673 */
674#ifndef BSS_FIRST_SECTIONS
675#define BSS_FIRST_SECTIONS
676#endif
677
678#define BSS(bss_align) \
679 . = ALIGN(bss_align); \
680 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \
681 BSS_FIRST_SECTIONS \
682 *(.bss..page_aligned) \
683 *(.dynbss) \
684 *(BSS_MAIN) \
685 *(COMMON) \
686 }
687
688/*
689 * DWARF debug sections.
690 * Symbols in the DWARF debugging sections are relative to
691 * the beginning of the section so we begin them at 0.
692 */
693#define DWARF_DEBUG \
694 /* DWARF 1 */ \
695 .debug 0 : { *(.debug) } \
696 .line 0 : { *(.line) } \
697 /* GNU DWARF 1 extensions */ \
698 .debug_srcinfo 0 : { *(.debug_srcinfo) } \
699 .debug_sfnames 0 : { *(.debug_sfnames) } \
700 /* DWARF 1.1 and DWARF 2 */ \
701 .debug_aranges 0 : { *(.debug_aranges) } \
702 .debug_pubnames 0 : { *(.debug_pubnames) } \
703 /* DWARF 2 */ \
704 .debug_info 0 : { *(.debug_info \
705 .gnu.linkonce.wi.*) } \
706 .debug_abbrev 0 : { *(.debug_abbrev) } \
707 .debug_line 0 : { *(.debug_line) } \
708 .debug_frame 0 : { *(.debug_frame) } \
709 .debug_str 0 : { *(.debug_str) } \
710 .debug_loc 0 : { *(.debug_loc) } \
711 .debug_macinfo 0 : { *(.debug_macinfo) } \
712 .debug_pubtypes 0 : { *(.debug_pubtypes) } \
713 /* DWARF 3 */ \
714 .debug_ranges 0 : { *(.debug_ranges) } \
715 /* SGI/MIPS DWARF 2 extensions */ \
716 .debug_weaknames 0 : { *(.debug_weaknames) } \
717 .debug_funcnames 0 : { *(.debug_funcnames) } \
718 .debug_typenames 0 : { *(.debug_typenames) } \
719 .debug_varnames 0 : { *(.debug_varnames) } \
720 /* GNU DWARF 2 extensions */ \
721 .debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) } \
722 .debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) } \
723 /* DWARF 4 */ \
724 .debug_types 0 : { *(.debug_types) } \
725 /* DWARF 5 */ \
726 .debug_macro 0 : { *(.debug_macro) } \
727 .debug_addr 0 : { *(.debug_addr) }
728
729 /* Stabs debugging sections. */
730#define STABS_DEBUG \
731 .stab 0 : { *(.stab) } \
732 .stabstr 0 : { *(.stabstr) } \
733 .stab.excl 0 : { *(.stab.excl) } \
734 .stab.exclstr 0 : { *(.stab.exclstr) } \
735 .stab.index 0 : { *(.stab.index) } \
736 .stab.indexstr 0 : { *(.stab.indexstr) } \
737 .comment 0 : { *(.comment) }
738
739#ifdef CONFIG_GENERIC_BUG
740#define BUG_TABLE \
741 . = ALIGN(8); \
742 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \
743 __start___bug_table = .; \
744 KEEP(*(__bug_table)) \
745 __stop___bug_table = .; \
746 }
747#else
748#define BUG_TABLE
749#endif
750
751#ifdef CONFIG_UNWINDER_ORC
752#define ORC_UNWIND_TABLE \
753 . = ALIGN(4); \
754 .orc_unwind_ip : AT(ADDR(.orc_unwind_ip) - LOAD_OFFSET) { \
755 __start_orc_unwind_ip = .; \
756 KEEP(*(.orc_unwind_ip)) \
757 __stop_orc_unwind_ip = .; \
758 } \
759 . = ALIGN(2); \
760 .orc_unwind : AT(ADDR(.orc_unwind) - LOAD_OFFSET) { \
761 __start_orc_unwind = .; \
762 KEEP(*(.orc_unwind)) \
763 __stop_orc_unwind = .; \
764 } \
765 . = ALIGN(4); \
766 .orc_lookup : AT(ADDR(.orc_lookup) - LOAD_OFFSET) { \
767 orc_lookup = .; \
768 . += (((SIZEOF(.text) + LOOKUP_BLOCK_SIZE - 1) / \
769 LOOKUP_BLOCK_SIZE) + 1) * 4; \
770 orc_lookup_end = .; \
771 }
772#else
773#define ORC_UNWIND_TABLE
774#endif
775
776#ifdef CONFIG_PM_TRACE
777#define TRACEDATA \
778 . = ALIGN(4); \
779 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \
780 __tracedata_start = .; \
781 KEEP(*(.tracedata)) \
782 __tracedata_end = .; \
783 }
784#else
785#define TRACEDATA
786#endif
787
788#define NOTES \
789 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \
790 __start_notes = .; \
791 KEEP(*(.note.*)) \
792 __stop_notes = .; \
793 }
794
795#define INIT_SETUP(initsetup_align) \
796 . = ALIGN(initsetup_align); \
797 __setup_start = .; \
798 KEEP(*(.init.setup)) \
799 __setup_end = .;
800
801#define INIT_CALLS_LEVEL(level) \
802 __initcall##level##_start = .; \
803 KEEP(*(.initcall##level##.init)) \
804 KEEP(*(.initcall##level##s.init)) \
805
806#define INIT_CALLS \
807 __initcall_start = .; \
808 KEEP(*(.initcallearly.init)) \
809 INIT_CALLS_LEVEL(0) \
810 INIT_CALLS_LEVEL(1) \
811 INIT_CALLS_LEVEL(2) \
812 INIT_CALLS_LEVEL(3) \
813 INIT_CALLS_LEVEL(4) \
814 INIT_CALLS_LEVEL(5) \
815 INIT_CALLS_LEVEL(rootfs) \
816 INIT_CALLS_LEVEL(6) \
817 INIT_CALLS_LEVEL(7) \
818 __initcall_end = .;
819
820#define CON_INITCALL \
821 __con_initcall_start = .; \
822 KEEP(*(.con_initcall.init)) \
823 __con_initcall_end = .;
824
825#ifdef CONFIG_BLK_DEV_INITRD
826#define INIT_RAM_FS \
827 . = ALIGN(4); \
828 __initramfs_start = .; \
829 KEEP(*(.init.ramfs)) \
830 . = ALIGN(8); \
831 KEEP(*(.init.ramfs.info))
832#else
833#define INIT_RAM_FS
834#endif
835
836/*
837 * Memory encryption operates on a page basis. Since we need to clear
838 * the memory encryption mask for this section, it needs to be aligned
839 * on a page boundary and be a page-size multiple in length.
840 *
841 * Note: We use a separate section so that only this section gets
842 * decrypted to avoid exposing more than we wish.
843 */
844#ifdef CONFIG_AMD_MEM_ENCRYPT
845#define PERCPU_DECRYPTED_SECTION \
846 . = ALIGN(PAGE_SIZE); \
847 *(.data..percpu..decrypted) \
848 . = ALIGN(PAGE_SIZE);
849#else
850#define PERCPU_DECRYPTED_SECTION
851#endif
852
853
854/*
855 * Default discarded sections.
856 *
857 * Some archs want to discard exit text/data at runtime rather than
858 * link time due to cross-section references such as alt instructions,
859 * bug table, eh_frame, etc. DISCARDS must be the last of output
860 * section definitions so that such archs put those in earlier section
861 * definitions.
862 */
863#define DISCARDS \
864 /DISCARD/ : { \
865 EXIT_TEXT \
866 EXIT_DATA \
867 EXIT_CALL \
868 *(.discard) \
869 *(.discard.*) \
870 *(.modinfo) \
871 }
872
873/**
874 * PERCPU_INPUT - the percpu input sections
875 * @cacheline: cacheline size
876 *
877 * The core percpu section names and core symbols which do not rely
878 * directly upon load addresses.
879 *
880 * @cacheline is used to align subsections to avoid false cacheline
881 * sharing between subsections for different purposes.
882 */
883#define PERCPU_INPUT(cacheline) \
884 __per_cpu_start = .; \
885 *(.data..percpu..first) \
886 . = ALIGN(PAGE_SIZE); \
887 *(.data..percpu..page_aligned) \
888 . = ALIGN(cacheline); \
889 *(.data..percpu..read_mostly) \
890 . = ALIGN(cacheline); \
891 *(.data..percpu) \
892 *(.data..percpu..shared_aligned) \
893 PERCPU_DECRYPTED_SECTION \
894 __per_cpu_end = .;
895
896/**
897 * PERCPU_VADDR - define output section for percpu area
898 * @cacheline: cacheline size
899 * @vaddr: explicit base address (optional)
900 * @phdr: destination PHDR (optional)
901 *
902 * Macro which expands to output section for percpu area.
903 *
904 * @cacheline is used to align subsections to avoid false cacheline
905 * sharing between subsections for different purposes.
906 *
907 * If @vaddr is not blank, it specifies explicit base address and all
908 * percpu symbols will be offset from the given address. If blank,
909 * @vaddr always equals @laddr + LOAD_OFFSET.
910 *
911 * @phdr defines the output PHDR to use if not blank. Be warned that
912 * output PHDR is sticky. If @phdr is specified, the next output
913 * section in the linker script will go there too. @phdr should have
914 * a leading colon.
915 *
916 * Note that this macros defines __per_cpu_load as an absolute symbol.
917 * If there is no need to put the percpu section at a predetermined
918 * address, use PERCPU_SECTION.
919 */
920#define PERCPU_VADDR(cacheline, vaddr, phdr) \
921 __per_cpu_load = .; \
922 .data..percpu vaddr : AT(__per_cpu_load - LOAD_OFFSET) { \
923 PERCPU_INPUT(cacheline) \
924 } phdr \
925 . = __per_cpu_load + SIZEOF(.data..percpu);
926
927/**
928 * PERCPU_SECTION - define output section for percpu area, simple version
929 * @cacheline: cacheline size
930 *
931 * Align to PAGE_SIZE and outputs output section for percpu area. This
932 * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and
933 * __per_cpu_start will be identical.
934 *
935 * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,)
936 * except that __per_cpu_load is defined as a relative symbol against
937 * .data..percpu which is required for relocatable x86_32 configuration.
938 */
939#define PERCPU_SECTION(cacheline) \
940 . = ALIGN(PAGE_SIZE); \
941 .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \
942 __per_cpu_load = .; \
943 PERCPU_INPUT(cacheline) \
944 }
945
946
947/*
948 * Definition of the high level *_SECTION macros
949 * They will fit only a subset of the architectures
950 */
951
952
953/*
954 * Writeable data.
955 * All sections are combined in a single .data section.
956 * The sections following CONSTRUCTORS are arranged so their
957 * typical alignment matches.
958 * A cacheline is typical/always less than a PAGE_SIZE so
959 * the sections that has this restriction (or similar)
960 * is located before the ones requiring PAGE_SIZE alignment.
961 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
962 * matches the requirement of PAGE_ALIGNED_DATA.
963 *
964 * use 0 as page_align if page_aligned data is not used */
965#define RW_DATA_SECTION(cacheline, pagealigned, inittask) \
966 . = ALIGN(PAGE_SIZE); \
967 .data : AT(ADDR(.data) - LOAD_OFFSET) { \
968 INIT_TASK_DATA(inittask) \
969 NOSAVE_DATA \
970 PAGE_ALIGNED_DATA(pagealigned) \
971 CACHELINE_ALIGNED_DATA(cacheline) \
972 READ_MOSTLY_DATA(cacheline) \
973 DATA_DATA \
974 CONSTRUCTORS \
975 } \
976 BUG_TABLE \
977
978#define INIT_TEXT_SECTION(inittext_align) \
979 . = ALIGN(inittext_align); \
980 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \
981 _sinittext = .; \
982 INIT_TEXT \
983 _einittext = .; \
984 }
985
986#define INIT_DATA_SECTION(initsetup_align) \
987 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \
988 INIT_DATA \
989 INIT_SETUP(initsetup_align) \
990 INIT_CALLS \
991 CON_INITCALL \
992 INIT_RAM_FS \
993 }
994
995#define BSS_SECTION(sbss_align, bss_align, stop_align) \
996 . = ALIGN(sbss_align); \
997 __bss_start = .; \
998 SBSS(sbss_align) \
999 BSS(bss_align) \
1000 . = ALIGN(stop_align); \
1001 __bss_stop = .;
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 * [_stext, _etext] is the text section
44 * [_sdata, _edata] is the data section
45 *
46 * Some of the included output section have their own set of constants.
47 * Examples are: [__initramfs_start, __initramfs_end] for initramfs and
48 * [__nosave_begin, __nosave_end] for the nosave data
49 */
50
51#ifndef LOAD_OFFSET
52#define LOAD_OFFSET 0
53#endif
54
55#ifndef SYMBOL_PREFIX
56#define VMLINUX_SYMBOL(sym) sym
57#else
58#define PASTE2(x,y) x##y
59#define PASTE(x,y) PASTE2(x,y)
60#define VMLINUX_SYMBOL(sym) PASTE(SYMBOL_PREFIX, sym)
61#endif
62
63/* Align . to a 8 byte boundary equals to maximum function alignment. */
64#define ALIGN_FUNCTION() . = ALIGN(8)
65
66/*
67 * Align to a 32 byte boundary equal to the
68 * alignment gcc 4.5 uses for a struct
69 */
70#define STRUCT_ALIGNMENT 32
71#define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT)
72
73/* The actual configuration determine if the init/exit sections
74 * are handled as text/data or they can be discarded (which
75 * often happens at runtime)
76 */
77#ifdef CONFIG_HOTPLUG
78#define DEV_KEEP(sec) *(.dev##sec)
79#define DEV_DISCARD(sec)
80#else
81#define DEV_KEEP(sec)
82#define DEV_DISCARD(sec) *(.dev##sec)
83#endif
84
85#ifdef CONFIG_HOTPLUG_CPU
86#define CPU_KEEP(sec) *(.cpu##sec)
87#define CPU_DISCARD(sec)
88#else
89#define CPU_KEEP(sec)
90#define CPU_DISCARD(sec) *(.cpu##sec)
91#endif
92
93#if defined(CONFIG_MEMORY_HOTPLUG)
94#define MEM_KEEP(sec) *(.mem##sec)
95#define MEM_DISCARD(sec)
96#else
97#define MEM_KEEP(sec)
98#define MEM_DISCARD(sec) *(.mem##sec)
99#endif
100
101#ifdef CONFIG_FTRACE_MCOUNT_RECORD
102#define MCOUNT_REC() . = ALIGN(8); \
103 VMLINUX_SYMBOL(__start_mcount_loc) = .; \
104 *(__mcount_loc) \
105 VMLINUX_SYMBOL(__stop_mcount_loc) = .;
106#else
107#define MCOUNT_REC()
108#endif
109
110#ifdef CONFIG_TRACE_BRANCH_PROFILING
111#define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \
112 *(_ftrace_annotated_branch) \
113 VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .;
114#else
115#define LIKELY_PROFILE()
116#endif
117
118#ifdef CONFIG_PROFILE_ALL_BRANCHES
119#define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \
120 *(_ftrace_branch) \
121 VMLINUX_SYMBOL(__stop_branch_profile) = .;
122#else
123#define BRANCH_PROFILE()
124#endif
125
126#ifdef CONFIG_EVENT_TRACING
127#define FTRACE_EVENTS() . = ALIGN(8); \
128 VMLINUX_SYMBOL(__start_ftrace_events) = .; \
129 *(_ftrace_events) \
130 VMLINUX_SYMBOL(__stop_ftrace_events) = .;
131#else
132#define FTRACE_EVENTS()
133#endif
134
135#ifdef CONFIG_TRACING
136#define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \
137 *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \
138 VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .;
139#else
140#define TRACE_PRINTKS()
141#endif
142
143#ifdef CONFIG_FTRACE_SYSCALLS
144#define TRACE_SYSCALLS() . = ALIGN(8); \
145 VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \
146 *(__syscalls_metadata) \
147 VMLINUX_SYMBOL(__stop_syscalls_metadata) = .;
148#else
149#define TRACE_SYSCALLS()
150#endif
151
152
153#define KERNEL_DTB() \
154 STRUCT_ALIGN(); \
155 VMLINUX_SYMBOL(__dtb_start) = .; \
156 *(.dtb.init.rodata) \
157 VMLINUX_SYMBOL(__dtb_end) = .;
158
159/* .data section */
160#define DATA_DATA \
161 *(.data) \
162 *(.ref.data) \
163 *(.data..shared_aligned) /* percpu related */ \
164 DEV_KEEP(init.data) \
165 DEV_KEEP(exit.data) \
166 CPU_KEEP(init.data) \
167 CPU_KEEP(exit.data) \
168 MEM_KEEP(init.data) \
169 MEM_KEEP(exit.data) \
170 *(.data.unlikely) \
171 STRUCT_ALIGN(); \
172 *(__tracepoints) \
173 /* implement dynamic printk debug */ \
174 . = ALIGN(8); \
175 VMLINUX_SYMBOL(__start___jump_table) = .; \
176 *(__jump_table) \
177 VMLINUX_SYMBOL(__stop___jump_table) = .; \
178 . = ALIGN(8); \
179 VMLINUX_SYMBOL(__start___verbose) = .; \
180 *(__verbose) \
181 VMLINUX_SYMBOL(__stop___verbose) = .; \
182 LIKELY_PROFILE() \
183 BRANCH_PROFILE() \
184 TRACE_PRINTKS()
185
186/*
187 * Data section helpers
188 */
189#define NOSAVE_DATA \
190 . = ALIGN(PAGE_SIZE); \
191 VMLINUX_SYMBOL(__nosave_begin) = .; \
192 *(.data..nosave) \
193 . = ALIGN(PAGE_SIZE); \
194 VMLINUX_SYMBOL(__nosave_end) = .;
195
196#define PAGE_ALIGNED_DATA(page_align) \
197 . = ALIGN(page_align); \
198 *(.data..page_aligned)
199
200#define READ_MOSTLY_DATA(align) \
201 . = ALIGN(align); \
202 *(.data..read_mostly) \
203 . = ALIGN(align);
204
205#define CACHELINE_ALIGNED_DATA(align) \
206 . = ALIGN(align); \
207 *(.data..cacheline_aligned)
208
209#define INIT_TASK_DATA(align) \
210 . = ALIGN(align); \
211 *(.data..init_task)
212
213/*
214 * Read only Data
215 */
216#define RO_DATA_SECTION(align) \
217 . = ALIGN((align)); \
218 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \
219 VMLINUX_SYMBOL(__start_rodata) = .; \
220 *(.rodata) *(.rodata.*) \
221 *(__vermagic) /* Kernel version magic */ \
222 . = ALIGN(8); \
223 VMLINUX_SYMBOL(__start___tracepoints_ptrs) = .; \
224 *(__tracepoints_ptrs) /* Tracepoints: pointer array */\
225 VMLINUX_SYMBOL(__stop___tracepoints_ptrs) = .; \
226 *(__tracepoints_strings)/* Tracepoints: strings */ \
227 } \
228 \
229 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \
230 *(.rodata1) \
231 } \
232 \
233 BUG_TABLE \
234 \
235 /* PCI quirks */ \
236 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \
237 VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \
238 *(.pci_fixup_early) \
239 VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \
240 VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \
241 *(.pci_fixup_header) \
242 VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \
243 VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \
244 *(.pci_fixup_final) \
245 VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \
246 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \
247 *(.pci_fixup_enable) \
248 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \
249 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \
250 *(.pci_fixup_resume) \
251 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \
252 VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \
253 *(.pci_fixup_resume_early) \
254 VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \
255 VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \
256 *(.pci_fixup_suspend) \
257 VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \
258 } \
259 \
260 /* Built-in firmware blobs */ \
261 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \
262 VMLINUX_SYMBOL(__start_builtin_fw) = .; \
263 *(.builtin_fw) \
264 VMLINUX_SYMBOL(__end_builtin_fw) = .; \
265 } \
266 \
267 /* RapidIO route ops */ \
268 .rio_ops : AT(ADDR(.rio_ops) - LOAD_OFFSET) { \
269 VMLINUX_SYMBOL(__start_rio_switch_ops) = .; \
270 *(.rio_switch_ops) \
271 VMLINUX_SYMBOL(__end_rio_switch_ops) = .; \
272 } \
273 \
274 TRACEDATA \
275 \
276 /* Kernel symbol table: Normal symbols */ \
277 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \
278 VMLINUX_SYMBOL(__start___ksymtab) = .; \
279 *(SORT(___ksymtab+*)) \
280 VMLINUX_SYMBOL(__stop___ksymtab) = .; \
281 } \
282 \
283 /* Kernel symbol table: GPL-only symbols */ \
284 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \
285 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \
286 *(SORT(___ksymtab_gpl+*)) \
287 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \
288 } \
289 \
290 /* Kernel symbol table: Normal unused symbols */ \
291 __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \
292 VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \
293 *(SORT(___ksymtab_unused+*)) \
294 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \
295 } \
296 \
297 /* Kernel symbol table: GPL-only unused symbols */ \
298 __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
299 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \
300 *(SORT(___ksymtab_unused_gpl+*)) \
301 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \
302 } \
303 \
304 /* Kernel symbol table: GPL-future-only symbols */ \
305 __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
306 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \
307 *(SORT(___ksymtab_gpl_future+*)) \
308 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \
309 } \
310 \
311 /* Kernel symbol table: Normal symbols */ \
312 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \
313 VMLINUX_SYMBOL(__start___kcrctab) = .; \
314 *(SORT(___kcrctab+*)) \
315 VMLINUX_SYMBOL(__stop___kcrctab) = .; \
316 } \
317 \
318 /* Kernel symbol table: GPL-only symbols */ \
319 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \
320 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \
321 *(SORT(___kcrctab_gpl+*)) \
322 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \
323 } \
324 \
325 /* Kernel symbol table: Normal unused symbols */ \
326 __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \
327 VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \
328 *(SORT(___kcrctab_unused+*)) \
329 VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \
330 } \
331 \
332 /* Kernel symbol table: GPL-only unused symbols */ \
333 __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
334 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \
335 *(SORT(___kcrctab_unused_gpl+*)) \
336 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \
337 } \
338 \
339 /* Kernel symbol table: GPL-future-only symbols */ \
340 __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
341 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \
342 *(SORT(___kcrctab_gpl_future+*)) \
343 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \
344 } \
345 \
346 /* Kernel symbol table: strings */ \
347 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
348 *(__ksymtab_strings) \
349 } \
350 \
351 /* __*init sections */ \
352 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \
353 *(.ref.rodata) \
354 DEV_KEEP(init.rodata) \
355 DEV_KEEP(exit.rodata) \
356 CPU_KEEP(init.rodata) \
357 CPU_KEEP(exit.rodata) \
358 MEM_KEEP(init.rodata) \
359 MEM_KEEP(exit.rodata) \
360 } \
361 \
362 /* Built-in module parameters. */ \
363 __param : AT(ADDR(__param) - LOAD_OFFSET) { \
364 VMLINUX_SYMBOL(__start___param) = .; \
365 *(__param) \
366 VMLINUX_SYMBOL(__stop___param) = .; \
367 } \
368 \
369 /* Built-in module versions. */ \
370 __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \
371 VMLINUX_SYMBOL(__start___modver) = .; \
372 *(__modver) \
373 VMLINUX_SYMBOL(__stop___modver) = .; \
374 . = ALIGN((align)); \
375 VMLINUX_SYMBOL(__end_rodata) = .; \
376 } \
377 . = ALIGN((align));
378
379/* RODATA & RO_DATA provided for backward compatibility.
380 * All archs are supposed to use RO_DATA() */
381#define RODATA RO_DATA_SECTION(4096)
382#define RO_DATA(align) RO_DATA_SECTION(align)
383
384#define SECURITY_INIT \
385 .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
386 VMLINUX_SYMBOL(__security_initcall_start) = .; \
387 *(.security_initcall.init) \
388 VMLINUX_SYMBOL(__security_initcall_end) = .; \
389 }
390
391/* .text section. Map to function alignment to avoid address changes
392 * during second ld run in second ld pass when generating System.map */
393#define TEXT_TEXT \
394 ALIGN_FUNCTION(); \
395 *(.text.hot) \
396 *(.text) \
397 *(.ref.text) \
398 DEV_KEEP(init.text) \
399 DEV_KEEP(exit.text) \
400 CPU_KEEP(init.text) \
401 CPU_KEEP(exit.text) \
402 MEM_KEEP(init.text) \
403 MEM_KEEP(exit.text) \
404 *(.text.unlikely)
405
406
407/* sched.text is aling to function alignment to secure we have same
408 * address even at second ld pass when generating System.map */
409#define SCHED_TEXT \
410 ALIGN_FUNCTION(); \
411 VMLINUX_SYMBOL(__sched_text_start) = .; \
412 *(.sched.text) \
413 VMLINUX_SYMBOL(__sched_text_end) = .;
414
415/* spinlock.text is aling to function alignment to secure we have same
416 * address even at second ld pass when generating System.map */
417#define LOCK_TEXT \
418 ALIGN_FUNCTION(); \
419 VMLINUX_SYMBOL(__lock_text_start) = .; \
420 *(.spinlock.text) \
421 VMLINUX_SYMBOL(__lock_text_end) = .;
422
423#define KPROBES_TEXT \
424 ALIGN_FUNCTION(); \
425 VMLINUX_SYMBOL(__kprobes_text_start) = .; \
426 *(.kprobes.text) \
427 VMLINUX_SYMBOL(__kprobes_text_end) = .;
428
429#define ENTRY_TEXT \
430 ALIGN_FUNCTION(); \
431 VMLINUX_SYMBOL(__entry_text_start) = .; \
432 *(.entry.text) \
433 VMLINUX_SYMBOL(__entry_text_end) = .;
434
435#ifdef CONFIG_FUNCTION_GRAPH_TRACER
436#define IRQENTRY_TEXT \
437 ALIGN_FUNCTION(); \
438 VMLINUX_SYMBOL(__irqentry_text_start) = .; \
439 *(.irqentry.text) \
440 VMLINUX_SYMBOL(__irqentry_text_end) = .;
441#else
442#define IRQENTRY_TEXT
443#endif
444
445/* Section used for early init (in .S files) */
446#define HEAD_TEXT *(.head.text)
447
448#define HEAD_TEXT_SECTION \
449 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \
450 HEAD_TEXT \
451 }
452
453/*
454 * Exception table
455 */
456#define EXCEPTION_TABLE(align) \
457 . = ALIGN(align); \
458 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \
459 VMLINUX_SYMBOL(__start___ex_table) = .; \
460 *(__ex_table) \
461 VMLINUX_SYMBOL(__stop___ex_table) = .; \
462 }
463
464/*
465 * Init task
466 */
467#define INIT_TASK_DATA_SECTION(align) \
468 . = ALIGN(align); \
469 .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \
470 INIT_TASK_DATA(align) \
471 }
472
473#ifdef CONFIG_CONSTRUCTORS
474#define KERNEL_CTORS() . = ALIGN(8); \
475 VMLINUX_SYMBOL(__ctors_start) = .; \
476 *(.ctors) \
477 VMLINUX_SYMBOL(__ctors_end) = .;
478#else
479#define KERNEL_CTORS()
480#endif
481
482/* init and exit section handling */
483#define INIT_DATA \
484 *(.init.data) \
485 DEV_DISCARD(init.data) \
486 CPU_DISCARD(init.data) \
487 MEM_DISCARD(init.data) \
488 KERNEL_CTORS() \
489 MCOUNT_REC() \
490 *(.init.rodata) \
491 FTRACE_EVENTS() \
492 TRACE_SYSCALLS() \
493 DEV_DISCARD(init.rodata) \
494 CPU_DISCARD(init.rodata) \
495 MEM_DISCARD(init.rodata) \
496 KERNEL_DTB()
497
498#define INIT_TEXT \
499 *(.init.text) \
500 DEV_DISCARD(init.text) \
501 CPU_DISCARD(init.text) \
502 MEM_DISCARD(init.text)
503
504#define EXIT_DATA \
505 *(.exit.data) \
506 DEV_DISCARD(exit.data) \
507 DEV_DISCARD(exit.rodata) \
508 CPU_DISCARD(exit.data) \
509 CPU_DISCARD(exit.rodata) \
510 MEM_DISCARD(exit.data) \
511 MEM_DISCARD(exit.rodata)
512
513#define EXIT_TEXT \
514 *(.exit.text) \
515 DEV_DISCARD(exit.text) \
516 CPU_DISCARD(exit.text) \
517 MEM_DISCARD(exit.text)
518
519#define EXIT_CALL \
520 *(.exitcall.exit)
521
522/*
523 * bss (Block Started by Symbol) - uninitialized data
524 * zeroed during startup
525 */
526#define SBSS(sbss_align) \
527 . = ALIGN(sbss_align); \
528 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \
529 *(.sbss) \
530 *(.scommon) \
531 }
532
533#define BSS(bss_align) \
534 . = ALIGN(bss_align); \
535 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \
536 *(.bss..page_aligned) \
537 *(.dynbss) \
538 *(.bss) \
539 *(COMMON) \
540 }
541
542/*
543 * DWARF debug sections.
544 * Symbols in the DWARF debugging sections are relative to
545 * the beginning of the section so we begin them at 0.
546 */
547#define DWARF_DEBUG \
548 /* DWARF 1 */ \
549 .debug 0 : { *(.debug) } \
550 .line 0 : { *(.line) } \
551 /* GNU DWARF 1 extensions */ \
552 .debug_srcinfo 0 : { *(.debug_srcinfo) } \
553 .debug_sfnames 0 : { *(.debug_sfnames) } \
554 /* DWARF 1.1 and DWARF 2 */ \
555 .debug_aranges 0 : { *(.debug_aranges) } \
556 .debug_pubnames 0 : { *(.debug_pubnames) } \
557 /* DWARF 2 */ \
558 .debug_info 0 : { *(.debug_info \
559 .gnu.linkonce.wi.*) } \
560 .debug_abbrev 0 : { *(.debug_abbrev) } \
561 .debug_line 0 : { *(.debug_line) } \
562 .debug_frame 0 : { *(.debug_frame) } \
563 .debug_str 0 : { *(.debug_str) } \
564 .debug_loc 0 : { *(.debug_loc) } \
565 .debug_macinfo 0 : { *(.debug_macinfo) } \
566 /* SGI/MIPS DWARF 2 extensions */ \
567 .debug_weaknames 0 : { *(.debug_weaknames) } \
568 .debug_funcnames 0 : { *(.debug_funcnames) } \
569 .debug_typenames 0 : { *(.debug_typenames) } \
570 .debug_varnames 0 : { *(.debug_varnames) } \
571
572 /* Stabs debugging sections. */
573#define STABS_DEBUG \
574 .stab 0 : { *(.stab) } \
575 .stabstr 0 : { *(.stabstr) } \
576 .stab.excl 0 : { *(.stab.excl) } \
577 .stab.exclstr 0 : { *(.stab.exclstr) } \
578 .stab.index 0 : { *(.stab.index) } \
579 .stab.indexstr 0 : { *(.stab.indexstr) } \
580 .comment 0 : { *(.comment) }
581
582#ifdef CONFIG_GENERIC_BUG
583#define BUG_TABLE \
584 . = ALIGN(8); \
585 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \
586 VMLINUX_SYMBOL(__start___bug_table) = .; \
587 *(__bug_table) \
588 VMLINUX_SYMBOL(__stop___bug_table) = .; \
589 }
590#else
591#define BUG_TABLE
592#endif
593
594#ifdef CONFIG_PM_TRACE
595#define TRACEDATA \
596 . = ALIGN(4); \
597 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \
598 VMLINUX_SYMBOL(__tracedata_start) = .; \
599 *(.tracedata) \
600 VMLINUX_SYMBOL(__tracedata_end) = .; \
601 }
602#else
603#define TRACEDATA
604#endif
605
606#define NOTES \
607 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \
608 VMLINUX_SYMBOL(__start_notes) = .; \
609 *(.note.*) \
610 VMLINUX_SYMBOL(__stop_notes) = .; \
611 }
612
613#define INIT_SETUP(initsetup_align) \
614 . = ALIGN(initsetup_align); \
615 VMLINUX_SYMBOL(__setup_start) = .; \
616 *(.init.setup) \
617 VMLINUX_SYMBOL(__setup_end) = .;
618
619#define INIT_CALLS_LEVEL(level) \
620 VMLINUX_SYMBOL(__initcall##level##_start) = .; \
621 *(.initcall##level##.init) \
622 *(.initcall##level##s.init) \
623
624#define INIT_CALLS \
625 VMLINUX_SYMBOL(__initcall_start) = .; \
626 *(.initcallearly.init) \
627 INIT_CALLS_LEVEL(0) \
628 INIT_CALLS_LEVEL(1) \
629 INIT_CALLS_LEVEL(2) \
630 INIT_CALLS_LEVEL(3) \
631 INIT_CALLS_LEVEL(4) \
632 INIT_CALLS_LEVEL(5) \
633 INIT_CALLS_LEVEL(rootfs) \
634 INIT_CALLS_LEVEL(6) \
635 INIT_CALLS_LEVEL(7) \
636 VMLINUX_SYMBOL(__initcall_end) = .;
637
638#define CON_INITCALL \
639 VMLINUX_SYMBOL(__con_initcall_start) = .; \
640 *(.con_initcall.init) \
641 VMLINUX_SYMBOL(__con_initcall_end) = .;
642
643#define SECURITY_INITCALL \
644 VMLINUX_SYMBOL(__security_initcall_start) = .; \
645 *(.security_initcall.init) \
646 VMLINUX_SYMBOL(__security_initcall_end) = .;
647
648#ifdef CONFIG_BLK_DEV_INITRD
649#define INIT_RAM_FS \
650 . = ALIGN(4); \
651 VMLINUX_SYMBOL(__initramfs_start) = .; \
652 *(.init.ramfs) \
653 . = ALIGN(8); \
654 *(.init.ramfs.info)
655#else
656#define INIT_RAM_FS
657#endif
658
659/*
660 * Default discarded sections.
661 *
662 * Some archs want to discard exit text/data at runtime rather than
663 * link time due to cross-section references such as alt instructions,
664 * bug table, eh_frame, etc. DISCARDS must be the last of output
665 * section definitions so that such archs put those in earlier section
666 * definitions.
667 */
668#define DISCARDS \
669 /DISCARD/ : { \
670 EXIT_TEXT \
671 EXIT_DATA \
672 EXIT_CALL \
673 *(.discard) \
674 *(.discard.*) \
675 }
676
677/**
678 * PERCPU_INPUT - the percpu input sections
679 * @cacheline: cacheline size
680 *
681 * The core percpu section names and core symbols which do not rely
682 * directly upon load addresses.
683 *
684 * @cacheline is used to align subsections to avoid false cacheline
685 * sharing between subsections for different purposes.
686 */
687#define PERCPU_INPUT(cacheline) \
688 VMLINUX_SYMBOL(__per_cpu_start) = .; \
689 *(.data..percpu..first) \
690 . = ALIGN(PAGE_SIZE); \
691 *(.data..percpu..page_aligned) \
692 . = ALIGN(cacheline); \
693 *(.data..percpu..readmostly) \
694 . = ALIGN(cacheline); \
695 *(.data..percpu) \
696 *(.data..percpu..shared_aligned) \
697 VMLINUX_SYMBOL(__per_cpu_end) = .;
698
699/**
700 * PERCPU_VADDR - define output section for percpu area
701 * @cacheline: cacheline size
702 * @vaddr: explicit base address (optional)
703 * @phdr: destination PHDR (optional)
704 *
705 * Macro which expands to output section for percpu area.
706 *
707 * @cacheline is used to align subsections to avoid false cacheline
708 * sharing between subsections for different purposes.
709 *
710 * If @vaddr is not blank, it specifies explicit base address and all
711 * percpu symbols will be offset from the given address. If blank,
712 * @vaddr always equals @laddr + LOAD_OFFSET.
713 *
714 * @phdr defines the output PHDR to use if not blank. Be warned that
715 * output PHDR is sticky. If @phdr is specified, the next output
716 * section in the linker script will go there too. @phdr should have
717 * a leading colon.
718 *
719 * Note that this macros defines __per_cpu_load as an absolute symbol.
720 * If there is no need to put the percpu section at a predetermined
721 * address, use PERCPU_SECTION.
722 */
723#define PERCPU_VADDR(cacheline, vaddr, phdr) \
724 VMLINUX_SYMBOL(__per_cpu_load) = .; \
725 .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \
726 - LOAD_OFFSET) { \
727 PERCPU_INPUT(cacheline) \
728 } phdr \
729 . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu);
730
731/**
732 * PERCPU_SECTION - define output section for percpu area, simple version
733 * @cacheline: cacheline size
734 *
735 * Align to PAGE_SIZE and outputs output section for percpu area. This
736 * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and
737 * __per_cpu_start will be identical.
738 *
739 * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,)
740 * except that __per_cpu_load is defined as a relative symbol against
741 * .data..percpu which is required for relocatable x86_32 configuration.
742 */
743#define PERCPU_SECTION(cacheline) \
744 . = ALIGN(PAGE_SIZE); \
745 .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \
746 VMLINUX_SYMBOL(__per_cpu_load) = .; \
747 PERCPU_INPUT(cacheline) \
748 }
749
750
751/*
752 * Definition of the high level *_SECTION macros
753 * They will fit only a subset of the architectures
754 */
755
756
757/*
758 * Writeable data.
759 * All sections are combined in a single .data section.
760 * The sections following CONSTRUCTORS are arranged so their
761 * typical alignment matches.
762 * A cacheline is typical/always less than a PAGE_SIZE so
763 * the sections that has this restriction (or similar)
764 * is located before the ones requiring PAGE_SIZE alignment.
765 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
766 * matches the requirement of PAGE_ALIGNED_DATA.
767 *
768 * use 0 as page_align if page_aligned data is not used */
769#define RW_DATA_SECTION(cacheline, pagealigned, inittask) \
770 . = ALIGN(PAGE_SIZE); \
771 .data : AT(ADDR(.data) - LOAD_OFFSET) { \
772 INIT_TASK_DATA(inittask) \
773 NOSAVE_DATA \
774 PAGE_ALIGNED_DATA(pagealigned) \
775 CACHELINE_ALIGNED_DATA(cacheline) \
776 READ_MOSTLY_DATA(cacheline) \
777 DATA_DATA \
778 CONSTRUCTORS \
779 }
780
781#define INIT_TEXT_SECTION(inittext_align) \
782 . = ALIGN(inittext_align); \
783 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \
784 VMLINUX_SYMBOL(_sinittext) = .; \
785 INIT_TEXT \
786 VMLINUX_SYMBOL(_einittext) = .; \
787 }
788
789#define INIT_DATA_SECTION(initsetup_align) \
790 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \
791 INIT_DATA \
792 INIT_SETUP(initsetup_align) \
793 INIT_CALLS \
794 CON_INITCALL \
795 SECURITY_INITCALL \
796 INIT_RAM_FS \
797 }
798
799#define BSS_SECTION(sbss_align, bss_align, stop_align) \
800 . = ALIGN(sbss_align); \
801 VMLINUX_SYMBOL(__bss_start) = .; \
802 SBSS(sbss_align) \
803 BSS(bss_align) \
804 . = ALIGN(stop_align); \
805 VMLINUX_SYMBOL(__bss_stop) = .;