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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 * [_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 STRUCT_ALIGN(); \
171 *(__tracepoints) \
172 /* implement dynamic printk debug */ \
173 . = ALIGN(8); \
174 VMLINUX_SYMBOL(__start___jump_table) = .; \
175 *(__jump_table) \
176 VMLINUX_SYMBOL(__stop___jump_table) = .; \
177 . = ALIGN(8); \
178 VMLINUX_SYMBOL(__start___verbose) = .; \
179 *(__verbose) \
180 VMLINUX_SYMBOL(__stop___verbose) = .; \
181 LIKELY_PROFILE() \
182 BRANCH_PROFILE() \
183 TRACE_PRINTKS()
184
185/*
186 * Data section helpers
187 */
188#define NOSAVE_DATA \
189 . = ALIGN(PAGE_SIZE); \
190 VMLINUX_SYMBOL(__nosave_begin) = .; \
191 *(.data..nosave) \
192 . = ALIGN(PAGE_SIZE); \
193 VMLINUX_SYMBOL(__nosave_end) = .;
194
195#define PAGE_ALIGNED_DATA(page_align) \
196 . = ALIGN(page_align); \
197 *(.data..page_aligned)
198
199#define READ_MOSTLY_DATA(align) \
200 . = ALIGN(align); \
201 *(.data..read_mostly) \
202 . = ALIGN(align);
203
204#define CACHELINE_ALIGNED_DATA(align) \
205 . = ALIGN(align); \
206 *(.data..cacheline_aligned)
207
208#define INIT_TASK_DATA(align) \
209 . = ALIGN(align); \
210 *(.data..init_task)
211
212/*
213 * Read only Data
214 */
215#define RO_DATA_SECTION(align) \
216 . = ALIGN((align)); \
217 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \
218 VMLINUX_SYMBOL(__start_rodata) = .; \
219 *(.rodata) *(.rodata.*) \
220 *(__vermagic) /* Kernel version magic */ \
221 . = ALIGN(8); \
222 VMLINUX_SYMBOL(__start___tracepoints_ptrs) = .; \
223 *(__tracepoints_ptrs) /* Tracepoints: pointer array */\
224 VMLINUX_SYMBOL(__stop___tracepoints_ptrs) = .; \
225 *(__markers_strings) /* Markers: strings */ \
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 *(.init.rodata) \
490 MCOUNT_REC() \
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 INITCALLS \
620 *(.initcallearly.init) \
621 VMLINUX_SYMBOL(__early_initcall_end) = .; \
622 *(.initcall0.init) \
623 *(.initcall0s.init) \
624 *(.initcall1.init) \
625 *(.initcall1s.init) \
626 *(.initcall2.init) \
627 *(.initcall2s.init) \
628 *(.initcall3.init) \
629 *(.initcall3s.init) \
630 *(.initcall4.init) \
631 *(.initcall4s.init) \
632 *(.initcall5.init) \
633 *(.initcall5s.init) \
634 *(.initcallrootfs.init) \
635 *(.initcall6.init) \
636 *(.initcall6s.init) \
637 *(.initcall7.init) \
638 *(.initcall7s.init)
639
640#define INIT_CALLS \
641 VMLINUX_SYMBOL(__initcall_start) = .; \
642 INITCALLS \
643 VMLINUX_SYMBOL(__initcall_end) = .;
644
645#define CON_INITCALL \
646 VMLINUX_SYMBOL(__con_initcall_start) = .; \
647 *(.con_initcall.init) \
648 VMLINUX_SYMBOL(__con_initcall_end) = .;
649
650#define SECURITY_INITCALL \
651 VMLINUX_SYMBOL(__security_initcall_start) = .; \
652 *(.security_initcall.init) \
653 VMLINUX_SYMBOL(__security_initcall_end) = .;
654
655#ifdef CONFIG_BLK_DEV_INITRD
656#define INIT_RAM_FS \
657 . = ALIGN(4); \
658 VMLINUX_SYMBOL(__initramfs_start) = .; \
659 *(.init.ramfs) \
660 . = ALIGN(8); \
661 *(.init.ramfs.info)
662#else
663#define INIT_RAM_FS
664#endif
665
666/*
667 * Default discarded sections.
668 *
669 * Some archs want to discard exit text/data at runtime rather than
670 * link time due to cross-section references such as alt instructions,
671 * bug table, eh_frame, etc. DISCARDS must be the last of output
672 * section definitions so that such archs put those in earlier section
673 * definitions.
674 */
675#define DISCARDS \
676 /DISCARD/ : { \
677 EXIT_TEXT \
678 EXIT_DATA \
679 EXIT_CALL \
680 *(.discard) \
681 *(.discard.*) \
682 }
683
684/**
685 * PERCPU_INPUT - the percpu input sections
686 * @cacheline: cacheline size
687 *
688 * The core percpu section names and core symbols which do not rely
689 * directly upon load addresses.
690 *
691 * @cacheline is used to align subsections to avoid false cacheline
692 * sharing between subsections for different purposes.
693 */
694#define PERCPU_INPUT(cacheline) \
695 VMLINUX_SYMBOL(__per_cpu_start) = .; \
696 *(.data..percpu..first) \
697 . = ALIGN(PAGE_SIZE); \
698 *(.data..percpu..page_aligned) \
699 . = ALIGN(cacheline); \
700 *(.data..percpu..readmostly) \
701 . = ALIGN(cacheline); \
702 *(.data..percpu) \
703 *(.data..percpu..shared_aligned) \
704 VMLINUX_SYMBOL(__per_cpu_end) = .;
705
706/**
707 * PERCPU_VADDR - define output section for percpu area
708 * @cacheline: cacheline size
709 * @vaddr: explicit base address (optional)
710 * @phdr: destination PHDR (optional)
711 *
712 * Macro which expands to output section for percpu area.
713 *
714 * @cacheline is used to align subsections to avoid false cacheline
715 * sharing between subsections for different purposes.
716 *
717 * If @vaddr is not blank, it specifies explicit base address and all
718 * percpu symbols will be offset from the given address. If blank,
719 * @vaddr always equals @laddr + LOAD_OFFSET.
720 *
721 * @phdr defines the output PHDR to use if not blank. Be warned that
722 * output PHDR is sticky. If @phdr is specified, the next output
723 * section in the linker script will go there too. @phdr should have
724 * a leading colon.
725 *
726 * Note that this macros defines __per_cpu_load as an absolute symbol.
727 * If there is no need to put the percpu section at a predetermined
728 * address, use PERCPU_SECTION.
729 */
730#define PERCPU_VADDR(cacheline, vaddr, phdr) \
731 VMLINUX_SYMBOL(__per_cpu_load) = .; \
732 .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \
733 - LOAD_OFFSET) { \
734 PERCPU_INPUT(cacheline) \
735 } phdr \
736 . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu);
737
738/**
739 * PERCPU_SECTION - define output section for percpu area, simple version
740 * @cacheline: cacheline size
741 *
742 * Align to PAGE_SIZE and outputs output section for percpu area. This
743 * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and
744 * __per_cpu_start will be identical.
745 *
746 * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,)
747 * except that __per_cpu_load is defined as a relative symbol against
748 * .data..percpu which is required for relocatable x86_32 configuration.
749 */
750#define PERCPU_SECTION(cacheline) \
751 . = ALIGN(PAGE_SIZE); \
752 .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \
753 VMLINUX_SYMBOL(__per_cpu_load) = .; \
754 PERCPU_INPUT(cacheline) \
755 }
756
757
758/*
759 * Definition of the high level *_SECTION macros
760 * They will fit only a subset of the architectures
761 */
762
763
764/*
765 * Writeable data.
766 * All sections are combined in a single .data section.
767 * The sections following CONSTRUCTORS are arranged so their
768 * typical alignment matches.
769 * A cacheline is typical/always less than a PAGE_SIZE so
770 * the sections that has this restriction (or similar)
771 * is located before the ones requiring PAGE_SIZE alignment.
772 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
773 * matches the requirement of PAGE_ALIGNED_DATA.
774 *
775 * use 0 as page_align if page_aligned data is not used */
776#define RW_DATA_SECTION(cacheline, pagealigned, inittask) \
777 . = ALIGN(PAGE_SIZE); \
778 .data : AT(ADDR(.data) - LOAD_OFFSET) { \
779 INIT_TASK_DATA(inittask) \
780 NOSAVE_DATA \
781 PAGE_ALIGNED_DATA(pagealigned) \
782 CACHELINE_ALIGNED_DATA(cacheline) \
783 READ_MOSTLY_DATA(cacheline) \
784 DATA_DATA \
785 CONSTRUCTORS \
786 }
787
788#define INIT_TEXT_SECTION(inittext_align) \
789 . = ALIGN(inittext_align); \
790 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \
791 VMLINUX_SYMBOL(_sinittext) = .; \
792 INIT_TEXT \
793 VMLINUX_SYMBOL(_einittext) = .; \
794 }
795
796#define INIT_DATA_SECTION(initsetup_align) \
797 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \
798 INIT_DATA \
799 INIT_SETUP(initsetup_align) \
800 INIT_CALLS \
801 CON_INITCALL \
802 SECURITY_INITCALL \
803 INIT_RAM_FS \
804 }
805
806#define BSS_SECTION(sbss_align, bss_align, stop_align) \
807 . = ALIGN(sbss_align); \
808 VMLINUX_SYMBOL(__bss_start) = .; \
809 SBSS(sbss_align) \
810 BSS(bss_align) \
811 . = ALIGN(stop_align); \
812 VMLINUX_SYMBOL(__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(PAGE_SIZE)
27 * RW_DATA(...)
28 * _edata = .;
29 *
30 * EXCEPTION_TABLE(...)
31 *
32 * BSS_SECTION(0, 0, 0)
33 * _end = .;
34 *
35 * STABS_DEBUG
36 * DWARF_DEBUG
37 *
38 * DISCARDS // must be the last
39 * }
40 *
41 * [__init_begin, __init_end] is the init section that may be freed after init
42 * // __init_begin and __init_end should be page aligned, so that we can
43 * // free the whole .init memory
44 * [_stext, _etext] is the text section
45 * [_sdata, _edata] is the data section
46 *
47 * Some of the included output section have their own set of constants.
48 * Examples are: [__initramfs_start, __initramfs_end] for initramfs and
49 * [__nosave_begin, __nosave_end] for the nosave data
50 */
51
52#ifndef LOAD_OFFSET
53#define LOAD_OFFSET 0
54#endif
55
56/*
57 * Only some architectures want to have the .notes segment visible in
58 * a separate PT_NOTE ELF Program Header. When this happens, it needs
59 * to be visible in both the kernel text's PT_LOAD and the PT_NOTE
60 * Program Headers. In this case, though, the PT_LOAD needs to be made
61 * the default again so that all the following sections don't also end
62 * up in the PT_NOTE Program Header.
63 */
64#ifdef EMITS_PT_NOTE
65#define NOTES_HEADERS :text :note
66#define NOTES_HEADERS_RESTORE __restore_ph : { *(.__restore_ph) } :text
67#else
68#define NOTES_HEADERS
69#define NOTES_HEADERS_RESTORE
70#endif
71
72/*
73 * Some architectures have non-executable read-only exception tables.
74 * They can be added to the RO_DATA segment by specifying their desired
75 * alignment.
76 */
77#ifdef RO_EXCEPTION_TABLE_ALIGN
78#define RO_EXCEPTION_TABLE EXCEPTION_TABLE(RO_EXCEPTION_TABLE_ALIGN)
79#else
80#define RO_EXCEPTION_TABLE
81#endif
82
83/* Align . to a 8 byte boundary equals to maximum function alignment. */
84#define ALIGN_FUNCTION() . = ALIGN(8)
85
86/*
87 * LD_DEAD_CODE_DATA_ELIMINATION option enables -fdata-sections, which
88 * generates .data.identifier sections, which need to be pulled in with
89 * .data. We don't want to pull in .data..other sections, which Linux
90 * has defined. Same for text and bss.
91 *
92 * RODATA_MAIN is not used because existing code already defines .rodata.x
93 * sections to be brought in with rodata.
94 */
95#ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
96#define TEXT_MAIN .text .text.[0-9a-zA-Z_]*
97#define DATA_MAIN .data .data.[0-9a-zA-Z_]* .data..LPBX*
98#define SDATA_MAIN .sdata .sdata.[0-9a-zA-Z_]*
99#define RODATA_MAIN .rodata .rodata.[0-9a-zA-Z_]*
100#define BSS_MAIN .bss .bss.[0-9a-zA-Z_]*
101#define SBSS_MAIN .sbss .sbss.[0-9a-zA-Z_]*
102#else
103#define TEXT_MAIN .text
104#define DATA_MAIN .data
105#define SDATA_MAIN .sdata
106#define RODATA_MAIN .rodata
107#define BSS_MAIN .bss
108#define SBSS_MAIN .sbss
109#endif
110
111/*
112 * GCC 4.5 and later have a 32 bytes section alignment for structures.
113 * Except GCC 4.9, that feels the need to align on 64 bytes.
114 */
115#if __GNUC__ == 4 && __GNUC_MINOR__ == 9
116#define STRUCT_ALIGNMENT 64
117#else
118#define STRUCT_ALIGNMENT 32
119#endif
120#define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT)
121
122/*
123 * The order of the sched class addresses are important, as they are
124 * used to determine the order of the priority of each sched class in
125 * relation to each other.
126 */
127#define SCHED_DATA \
128 STRUCT_ALIGN(); \
129 __begin_sched_classes = .; \
130 *(__idle_sched_class) \
131 *(__fair_sched_class) \
132 *(__rt_sched_class) \
133 *(__dl_sched_class) \
134 *(__stop_sched_class) \
135 __end_sched_classes = .;
136
137/* The actual configuration determine if the init/exit sections
138 * are handled as text/data or they can be discarded (which
139 * often happens at runtime)
140 */
141#ifdef CONFIG_HOTPLUG_CPU
142#define CPU_KEEP(sec) *(.cpu##sec)
143#define CPU_DISCARD(sec)
144#else
145#define CPU_KEEP(sec)
146#define CPU_DISCARD(sec) *(.cpu##sec)
147#endif
148
149#if defined(CONFIG_MEMORY_HOTPLUG)
150#define MEM_KEEP(sec) *(.mem##sec)
151#define MEM_DISCARD(sec)
152#else
153#define MEM_KEEP(sec)
154#define MEM_DISCARD(sec) *(.mem##sec)
155#endif
156
157#ifdef CONFIG_FTRACE_MCOUNT_RECORD
158/*
159 * The ftrace call sites are logged to a section whose name depends on the
160 * compiler option used. A given kernel image will only use one, AKA
161 * FTRACE_CALLSITE_SECTION. We capture all of them here to avoid header
162 * dependencies for FTRACE_CALLSITE_SECTION's definition.
163 *
164 * Need to also make ftrace_stub_graph point to ftrace_stub
165 * so that the same stub location may have different protocols
166 * and not mess up with C verifiers.
167 */
168#define MCOUNT_REC() . = ALIGN(8); \
169 __start_mcount_loc = .; \
170 KEEP(*(__mcount_loc)) \
171 KEEP(*(__patchable_function_entries)) \
172 __stop_mcount_loc = .; \
173 ftrace_stub_graph = ftrace_stub;
174#else
175# ifdef CONFIG_FUNCTION_TRACER
176# define MCOUNT_REC() ftrace_stub_graph = ftrace_stub;
177# else
178# define MCOUNT_REC()
179# endif
180#endif
181
182#ifdef CONFIG_TRACE_BRANCH_PROFILING
183#define LIKELY_PROFILE() __start_annotated_branch_profile = .; \
184 KEEP(*(_ftrace_annotated_branch)) \
185 __stop_annotated_branch_profile = .;
186#else
187#define LIKELY_PROFILE()
188#endif
189
190#ifdef CONFIG_PROFILE_ALL_BRANCHES
191#define BRANCH_PROFILE() __start_branch_profile = .; \
192 KEEP(*(_ftrace_branch)) \
193 __stop_branch_profile = .;
194#else
195#define BRANCH_PROFILE()
196#endif
197
198#ifdef CONFIG_KPROBES
199#define KPROBE_BLACKLIST() . = ALIGN(8); \
200 __start_kprobe_blacklist = .; \
201 KEEP(*(_kprobe_blacklist)) \
202 __stop_kprobe_blacklist = .;
203#else
204#define KPROBE_BLACKLIST()
205#endif
206
207#ifdef CONFIG_FUNCTION_ERROR_INJECTION
208#define ERROR_INJECT_WHITELIST() STRUCT_ALIGN(); \
209 __start_error_injection_whitelist = .; \
210 KEEP(*(_error_injection_whitelist)) \
211 __stop_error_injection_whitelist = .;
212#else
213#define ERROR_INJECT_WHITELIST()
214#endif
215
216#ifdef CONFIG_EVENT_TRACING
217#define FTRACE_EVENTS() . = ALIGN(8); \
218 __start_ftrace_events = .; \
219 KEEP(*(_ftrace_events)) \
220 __stop_ftrace_events = .; \
221 __start_ftrace_eval_maps = .; \
222 KEEP(*(_ftrace_eval_map)) \
223 __stop_ftrace_eval_maps = .;
224#else
225#define FTRACE_EVENTS()
226#endif
227
228#ifdef CONFIG_TRACING
229#define TRACE_PRINTKS() __start___trace_bprintk_fmt = .; \
230 KEEP(*(__trace_printk_fmt)) /* Trace_printk fmt' pointer */ \
231 __stop___trace_bprintk_fmt = .;
232#define TRACEPOINT_STR() __start___tracepoint_str = .; \
233 KEEP(*(__tracepoint_str)) /* Trace_printk fmt' pointer */ \
234 __stop___tracepoint_str = .;
235#else
236#define TRACE_PRINTKS()
237#define TRACEPOINT_STR()
238#endif
239
240#ifdef CONFIG_FTRACE_SYSCALLS
241#define TRACE_SYSCALLS() . = ALIGN(8); \
242 __start_syscalls_metadata = .; \
243 KEEP(*(__syscalls_metadata)) \
244 __stop_syscalls_metadata = .;
245#else
246#define TRACE_SYSCALLS()
247#endif
248
249#ifdef CONFIG_BPF_EVENTS
250#define BPF_RAW_TP() STRUCT_ALIGN(); \
251 __start__bpf_raw_tp = .; \
252 KEEP(*(__bpf_raw_tp_map)) \
253 __stop__bpf_raw_tp = .;
254#else
255#define BPF_RAW_TP()
256#endif
257
258#ifdef CONFIG_SERIAL_EARLYCON
259#define EARLYCON_TABLE() . = ALIGN(8); \
260 __earlycon_table = .; \
261 KEEP(*(__earlycon_table)) \
262 __earlycon_table_end = .;
263#else
264#define EARLYCON_TABLE()
265#endif
266
267#ifdef CONFIG_SECURITY
268#define LSM_TABLE() . = ALIGN(8); \
269 __start_lsm_info = .; \
270 KEEP(*(.lsm_info.init)) \
271 __end_lsm_info = .;
272#define EARLY_LSM_TABLE() . = ALIGN(8); \
273 __start_early_lsm_info = .; \
274 KEEP(*(.early_lsm_info.init)) \
275 __end_early_lsm_info = .;
276#else
277#define LSM_TABLE()
278#define EARLY_LSM_TABLE()
279#endif
280
281#define ___OF_TABLE(cfg, name) _OF_TABLE_##cfg(name)
282#define __OF_TABLE(cfg, name) ___OF_TABLE(cfg, name)
283#define OF_TABLE(cfg, name) __OF_TABLE(IS_ENABLED(cfg), name)
284#define _OF_TABLE_0(name)
285#define _OF_TABLE_1(name) \
286 . = ALIGN(8); \
287 __##name##_of_table = .; \
288 KEEP(*(__##name##_of_table)) \
289 KEEP(*(__##name##_of_table_end))
290
291#define TIMER_OF_TABLES() OF_TABLE(CONFIG_TIMER_OF, timer)
292#define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip)
293#define CLK_OF_TABLES() OF_TABLE(CONFIG_COMMON_CLK, clk)
294#define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem)
295#define CPU_METHOD_OF_TABLES() OF_TABLE(CONFIG_SMP, cpu_method)
296#define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method)
297
298#ifdef CONFIG_ACPI
299#define ACPI_PROBE_TABLE(name) \
300 . = ALIGN(8); \
301 __##name##_acpi_probe_table = .; \
302 KEEP(*(__##name##_acpi_probe_table)) \
303 __##name##_acpi_probe_table_end = .;
304#else
305#define ACPI_PROBE_TABLE(name)
306#endif
307
308#ifdef CONFIG_THERMAL
309#define THERMAL_TABLE(name) \
310 . = ALIGN(8); \
311 __##name##_thermal_table = .; \
312 KEEP(*(__##name##_thermal_table)) \
313 __##name##_thermal_table_end = .;
314#else
315#define THERMAL_TABLE(name)
316#endif
317
318#define KERNEL_DTB() \
319 STRUCT_ALIGN(); \
320 __dtb_start = .; \
321 KEEP(*(.dtb.init.rodata)) \
322 __dtb_end = .;
323
324/*
325 * .data section
326 */
327#define DATA_DATA \
328 *(.xiptext) \
329 *(DATA_MAIN) \
330 *(.ref.data) \
331 *(.data..shared_aligned) /* percpu related */ \
332 MEM_KEEP(init.data*) \
333 MEM_KEEP(exit.data*) \
334 *(.data.unlikely) \
335 __start_once = .; \
336 *(.data.once) \
337 __end_once = .; \
338 STRUCT_ALIGN(); \
339 *(__tracepoints) \
340 /* implement dynamic printk debug */ \
341 . = ALIGN(8); \
342 __start___dyndbg = .; \
343 KEEP(*(__dyndbg)) \
344 __stop___dyndbg = .; \
345 LIKELY_PROFILE() \
346 BRANCH_PROFILE() \
347 TRACE_PRINTKS() \
348 BPF_RAW_TP() \
349 TRACEPOINT_STR()
350
351/*
352 * Data section helpers
353 */
354#define NOSAVE_DATA \
355 . = ALIGN(PAGE_SIZE); \
356 __nosave_begin = .; \
357 *(.data..nosave) \
358 . = ALIGN(PAGE_SIZE); \
359 __nosave_end = .;
360
361#define PAGE_ALIGNED_DATA(page_align) \
362 . = ALIGN(page_align); \
363 *(.data..page_aligned) \
364 . = ALIGN(page_align);
365
366#define READ_MOSTLY_DATA(align) \
367 . = ALIGN(align); \
368 *(.data..read_mostly) \
369 . = ALIGN(align);
370
371#define CACHELINE_ALIGNED_DATA(align) \
372 . = ALIGN(align); \
373 *(.data..cacheline_aligned)
374
375#define INIT_TASK_DATA(align) \
376 . = ALIGN(align); \
377 __start_init_task = .; \
378 init_thread_union = .; \
379 init_stack = .; \
380 KEEP(*(.data..init_task)) \
381 KEEP(*(.data..init_thread_info)) \
382 . = __start_init_task + THREAD_SIZE; \
383 __end_init_task = .;
384
385#define JUMP_TABLE_DATA \
386 . = ALIGN(8); \
387 __start___jump_table = .; \
388 KEEP(*(__jump_table)) \
389 __stop___jump_table = .;
390
391/*
392 * Allow architectures to handle ro_after_init data on their
393 * own by defining an empty RO_AFTER_INIT_DATA.
394 */
395#ifndef RO_AFTER_INIT_DATA
396#define RO_AFTER_INIT_DATA \
397 . = ALIGN(8); \
398 __start_ro_after_init = .; \
399 *(.data..ro_after_init) \
400 JUMP_TABLE_DATA \
401 __end_ro_after_init = .;
402#endif
403
404/*
405 * Read only Data
406 */
407#define RO_DATA(align) \
408 . = ALIGN((align)); \
409 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \
410 __start_rodata = .; \
411 *(.rodata) *(.rodata.*) \
412 SCHED_DATA \
413 RO_AFTER_INIT_DATA /* Read only after init */ \
414 . = ALIGN(8); \
415 __start___tracepoints_ptrs = .; \
416 KEEP(*(__tracepoints_ptrs)) /* Tracepoints: pointer array */ \
417 __stop___tracepoints_ptrs = .; \
418 *(__tracepoints_strings)/* Tracepoints: strings */ \
419 } \
420 \
421 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \
422 *(.rodata1) \
423 } \
424 \
425 /* PCI quirks */ \
426 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \
427 __start_pci_fixups_early = .; \
428 KEEP(*(.pci_fixup_early)) \
429 __end_pci_fixups_early = .; \
430 __start_pci_fixups_header = .; \
431 KEEP(*(.pci_fixup_header)) \
432 __end_pci_fixups_header = .; \
433 __start_pci_fixups_final = .; \
434 KEEP(*(.pci_fixup_final)) \
435 __end_pci_fixups_final = .; \
436 __start_pci_fixups_enable = .; \
437 KEEP(*(.pci_fixup_enable)) \
438 __end_pci_fixups_enable = .; \
439 __start_pci_fixups_resume = .; \
440 KEEP(*(.pci_fixup_resume)) \
441 __end_pci_fixups_resume = .; \
442 __start_pci_fixups_resume_early = .; \
443 KEEP(*(.pci_fixup_resume_early)) \
444 __end_pci_fixups_resume_early = .; \
445 __start_pci_fixups_suspend = .; \
446 KEEP(*(.pci_fixup_suspend)) \
447 __end_pci_fixups_suspend = .; \
448 __start_pci_fixups_suspend_late = .; \
449 KEEP(*(.pci_fixup_suspend_late)) \
450 __end_pci_fixups_suspend_late = .; \
451 } \
452 \
453 /* Built-in firmware blobs */ \
454 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \
455 __start_builtin_fw = .; \
456 KEEP(*(.builtin_fw)) \
457 __end_builtin_fw = .; \
458 } \
459 \
460 TRACEDATA \
461 \
462 /* Kernel symbol table: Normal symbols */ \
463 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \
464 __start___ksymtab = .; \
465 KEEP(*(SORT(___ksymtab+*))) \
466 __stop___ksymtab = .; \
467 } \
468 \
469 /* Kernel symbol table: GPL-only symbols */ \
470 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \
471 __start___ksymtab_gpl = .; \
472 KEEP(*(SORT(___ksymtab_gpl+*))) \
473 __stop___ksymtab_gpl = .; \
474 } \
475 \
476 /* Kernel symbol table: Normal unused symbols */ \
477 __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \
478 __start___ksymtab_unused = .; \
479 KEEP(*(SORT(___ksymtab_unused+*))) \
480 __stop___ksymtab_unused = .; \
481 } \
482 \
483 /* Kernel symbol table: GPL-only unused symbols */ \
484 __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
485 __start___ksymtab_unused_gpl = .; \
486 KEEP(*(SORT(___ksymtab_unused_gpl+*))) \
487 __stop___ksymtab_unused_gpl = .; \
488 } \
489 \
490 /* Kernel symbol table: GPL-future-only symbols */ \
491 __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
492 __start___ksymtab_gpl_future = .; \
493 KEEP(*(SORT(___ksymtab_gpl_future+*))) \
494 __stop___ksymtab_gpl_future = .; \
495 } \
496 \
497 /* Kernel symbol table: Normal symbols */ \
498 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \
499 __start___kcrctab = .; \
500 KEEP(*(SORT(___kcrctab+*))) \
501 __stop___kcrctab = .; \
502 } \
503 \
504 /* Kernel symbol table: GPL-only symbols */ \
505 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \
506 __start___kcrctab_gpl = .; \
507 KEEP(*(SORT(___kcrctab_gpl+*))) \
508 __stop___kcrctab_gpl = .; \
509 } \
510 \
511 /* Kernel symbol table: Normal unused symbols */ \
512 __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \
513 __start___kcrctab_unused = .; \
514 KEEP(*(SORT(___kcrctab_unused+*))) \
515 __stop___kcrctab_unused = .; \
516 } \
517 \
518 /* Kernel symbol table: GPL-only unused symbols */ \
519 __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
520 __start___kcrctab_unused_gpl = .; \
521 KEEP(*(SORT(___kcrctab_unused_gpl+*))) \
522 __stop___kcrctab_unused_gpl = .; \
523 } \
524 \
525 /* Kernel symbol table: GPL-future-only symbols */ \
526 __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
527 __start___kcrctab_gpl_future = .; \
528 KEEP(*(SORT(___kcrctab_gpl_future+*))) \
529 __stop___kcrctab_gpl_future = .; \
530 } \
531 \
532 /* Kernel symbol table: strings */ \
533 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
534 *(__ksymtab_strings) \
535 } \
536 \
537 /* __*init sections */ \
538 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \
539 *(.ref.rodata) \
540 MEM_KEEP(init.rodata) \
541 MEM_KEEP(exit.rodata) \
542 } \
543 \
544 /* Built-in module parameters. */ \
545 __param : AT(ADDR(__param) - LOAD_OFFSET) { \
546 __start___param = .; \
547 KEEP(*(__param)) \
548 __stop___param = .; \
549 } \
550 \
551 /* Built-in module versions. */ \
552 __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \
553 __start___modver = .; \
554 KEEP(*(__modver)) \
555 __stop___modver = .; \
556 } \
557 \
558 RO_EXCEPTION_TABLE \
559 NOTES \
560 BTF \
561 \
562 . = ALIGN((align)); \
563 __end_rodata = .;
564
565/*
566 * Non-instrumentable text section
567 */
568#define NOINSTR_TEXT \
569 ALIGN_FUNCTION(); \
570 __noinstr_text_start = .; \
571 *(.noinstr.text) \
572 __noinstr_text_end = .;
573
574/*
575 * .text section. Map to function alignment to avoid address changes
576 * during second ld run in second ld pass when generating System.map
577 *
578 * TEXT_MAIN here will match .text.fixup and .text.unlikely if dead
579 * code elimination is enabled, so these sections should be converted
580 * to use ".." first.
581 */
582#define TEXT_TEXT \
583 ALIGN_FUNCTION(); \
584 *(.text.hot TEXT_MAIN .text.fixup .text.unlikely) \
585 NOINSTR_TEXT \
586 *(.text..refcount) \
587 *(.ref.text) \
588 MEM_KEEP(init.text*) \
589 MEM_KEEP(exit.text*) \
590
591
592/* sched.text is aling to function alignment to secure we have same
593 * address even at second ld pass when generating System.map */
594#define SCHED_TEXT \
595 ALIGN_FUNCTION(); \
596 __sched_text_start = .; \
597 *(.sched.text) \
598 __sched_text_end = .;
599
600/* spinlock.text is aling to function alignment to secure we have same
601 * address even at second ld pass when generating System.map */
602#define LOCK_TEXT \
603 ALIGN_FUNCTION(); \
604 __lock_text_start = .; \
605 *(.spinlock.text) \
606 __lock_text_end = .;
607
608#define CPUIDLE_TEXT \
609 ALIGN_FUNCTION(); \
610 __cpuidle_text_start = .; \
611 *(.cpuidle.text) \
612 __cpuidle_text_end = .;
613
614#define KPROBES_TEXT \
615 ALIGN_FUNCTION(); \
616 __kprobes_text_start = .; \
617 *(.kprobes.text) \
618 __kprobes_text_end = .;
619
620#define ENTRY_TEXT \
621 ALIGN_FUNCTION(); \
622 __entry_text_start = .; \
623 *(.entry.text) \
624 __entry_text_end = .;
625
626#define IRQENTRY_TEXT \
627 ALIGN_FUNCTION(); \
628 __irqentry_text_start = .; \
629 *(.irqentry.text) \
630 __irqentry_text_end = .;
631
632#define SOFTIRQENTRY_TEXT \
633 ALIGN_FUNCTION(); \
634 __softirqentry_text_start = .; \
635 *(.softirqentry.text) \
636 __softirqentry_text_end = .;
637
638/* Section used for early init (in .S files) */
639#define HEAD_TEXT KEEP(*(.head.text))
640
641#define HEAD_TEXT_SECTION \
642 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \
643 HEAD_TEXT \
644 }
645
646/*
647 * Exception table
648 */
649#define EXCEPTION_TABLE(align) \
650 . = ALIGN(align); \
651 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \
652 __start___ex_table = .; \
653 KEEP(*(__ex_table)) \
654 __stop___ex_table = .; \
655 }
656
657/*
658 * .BTF
659 */
660#ifdef CONFIG_DEBUG_INFO_BTF
661#define BTF \
662 .BTF : AT(ADDR(.BTF) - LOAD_OFFSET) { \
663 __start_BTF = .; \
664 KEEP(*(.BTF)) \
665 __stop_BTF = .; \
666 } \
667 . = ALIGN(4); \
668 .BTF_ids : AT(ADDR(.BTF_ids) - LOAD_OFFSET) { \
669 *(.BTF_ids) \
670 }
671#else
672#define BTF
673#endif
674
675/*
676 * Init task
677 */
678#define INIT_TASK_DATA_SECTION(align) \
679 . = ALIGN(align); \
680 .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \
681 INIT_TASK_DATA(align) \
682 }
683
684#ifdef CONFIG_CONSTRUCTORS
685#define KERNEL_CTORS() . = ALIGN(8); \
686 __ctors_start = .; \
687 KEEP(*(.ctors)) \
688 KEEP(*(SORT(.init_array.*))) \
689 KEEP(*(.init_array)) \
690 __ctors_end = .;
691#else
692#define KERNEL_CTORS()
693#endif
694
695/* init and exit section handling */
696#define INIT_DATA \
697 KEEP(*(SORT(___kentry+*))) \
698 *(.init.data init.data.*) \
699 MEM_DISCARD(init.data*) \
700 KERNEL_CTORS() \
701 MCOUNT_REC() \
702 *(.init.rodata .init.rodata.*) \
703 FTRACE_EVENTS() \
704 TRACE_SYSCALLS() \
705 KPROBE_BLACKLIST() \
706 ERROR_INJECT_WHITELIST() \
707 MEM_DISCARD(init.rodata) \
708 CLK_OF_TABLES() \
709 RESERVEDMEM_OF_TABLES() \
710 TIMER_OF_TABLES() \
711 CPU_METHOD_OF_TABLES() \
712 CPUIDLE_METHOD_OF_TABLES() \
713 KERNEL_DTB() \
714 IRQCHIP_OF_MATCH_TABLE() \
715 ACPI_PROBE_TABLE(irqchip) \
716 ACPI_PROBE_TABLE(timer) \
717 THERMAL_TABLE(governor) \
718 EARLYCON_TABLE() \
719 LSM_TABLE() \
720 EARLY_LSM_TABLE()
721
722#define INIT_TEXT \
723 *(.init.text .init.text.*) \
724 *(.text.startup) \
725 MEM_DISCARD(init.text*)
726
727#define EXIT_DATA \
728 *(.exit.data .exit.data.*) \
729 *(.fini_array .fini_array.*) \
730 *(.dtors .dtors.*) \
731 MEM_DISCARD(exit.data*) \
732 MEM_DISCARD(exit.rodata*)
733
734#define EXIT_TEXT \
735 *(.exit.text) \
736 *(.text.exit) \
737 MEM_DISCARD(exit.text)
738
739#define EXIT_CALL \
740 *(.exitcall.exit)
741
742/*
743 * bss (Block Started by Symbol) - uninitialized data
744 * zeroed during startup
745 */
746#define SBSS(sbss_align) \
747 . = ALIGN(sbss_align); \
748 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \
749 *(.dynsbss) \
750 *(SBSS_MAIN) \
751 *(.scommon) \
752 }
753
754/*
755 * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra
756 * sections to the front of bss.
757 */
758#ifndef BSS_FIRST_SECTIONS
759#define BSS_FIRST_SECTIONS
760#endif
761
762#define BSS(bss_align) \
763 . = ALIGN(bss_align); \
764 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \
765 BSS_FIRST_SECTIONS \
766 . = ALIGN(PAGE_SIZE); \
767 *(.bss..page_aligned) \
768 . = ALIGN(PAGE_SIZE); \
769 *(.dynbss) \
770 *(BSS_MAIN) \
771 *(COMMON) \
772 }
773
774/*
775 * DWARF debug sections.
776 * Symbols in the DWARF debugging sections are relative to
777 * the beginning of the section so we begin them at 0.
778 */
779#define DWARF_DEBUG \
780 /* DWARF 1 */ \
781 .debug 0 : { *(.debug) } \
782 .line 0 : { *(.line) } \
783 /* GNU DWARF 1 extensions */ \
784 .debug_srcinfo 0 : { *(.debug_srcinfo) } \
785 .debug_sfnames 0 : { *(.debug_sfnames) } \
786 /* DWARF 1.1 and DWARF 2 */ \
787 .debug_aranges 0 : { *(.debug_aranges) } \
788 .debug_pubnames 0 : { *(.debug_pubnames) } \
789 /* DWARF 2 */ \
790 .debug_info 0 : { *(.debug_info \
791 .gnu.linkonce.wi.*) } \
792 .debug_abbrev 0 : { *(.debug_abbrev) } \
793 .debug_line 0 : { *(.debug_line) } \
794 .debug_frame 0 : { *(.debug_frame) } \
795 .debug_str 0 : { *(.debug_str) } \
796 .debug_loc 0 : { *(.debug_loc) } \
797 .debug_macinfo 0 : { *(.debug_macinfo) } \
798 .debug_pubtypes 0 : { *(.debug_pubtypes) } \
799 /* DWARF 3 */ \
800 .debug_ranges 0 : { *(.debug_ranges) } \
801 /* SGI/MIPS DWARF 2 extensions */ \
802 .debug_weaknames 0 : { *(.debug_weaknames) } \
803 .debug_funcnames 0 : { *(.debug_funcnames) } \
804 .debug_typenames 0 : { *(.debug_typenames) } \
805 .debug_varnames 0 : { *(.debug_varnames) } \
806 /* GNU DWARF 2 extensions */ \
807 .debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) } \
808 .debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) } \
809 /* DWARF 4 */ \
810 .debug_types 0 : { *(.debug_types) } \
811 /* DWARF 5 */ \
812 .debug_macro 0 : { *(.debug_macro) } \
813 .debug_addr 0 : { *(.debug_addr) }
814
815 /* Stabs debugging sections. */
816#define STABS_DEBUG \
817 .stab 0 : { *(.stab) } \
818 .stabstr 0 : { *(.stabstr) } \
819 .stab.excl 0 : { *(.stab.excl) } \
820 .stab.exclstr 0 : { *(.stab.exclstr) } \
821 .stab.index 0 : { *(.stab.index) } \
822 .stab.indexstr 0 : { *(.stab.indexstr) } \
823 .comment 0 : { *(.comment) }
824
825#ifdef CONFIG_GENERIC_BUG
826#define BUG_TABLE \
827 . = ALIGN(8); \
828 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \
829 __start___bug_table = .; \
830 KEEP(*(__bug_table)) \
831 __stop___bug_table = .; \
832 }
833#else
834#define BUG_TABLE
835#endif
836
837#ifdef CONFIG_UNWINDER_ORC
838#define ORC_UNWIND_TABLE \
839 . = ALIGN(4); \
840 .orc_unwind_ip : AT(ADDR(.orc_unwind_ip) - LOAD_OFFSET) { \
841 __start_orc_unwind_ip = .; \
842 KEEP(*(.orc_unwind_ip)) \
843 __stop_orc_unwind_ip = .; \
844 } \
845 . = ALIGN(2); \
846 .orc_unwind : AT(ADDR(.orc_unwind) - LOAD_OFFSET) { \
847 __start_orc_unwind = .; \
848 KEEP(*(.orc_unwind)) \
849 __stop_orc_unwind = .; \
850 } \
851 . = ALIGN(4); \
852 .orc_lookup : AT(ADDR(.orc_lookup) - LOAD_OFFSET) { \
853 orc_lookup = .; \
854 . += (((SIZEOF(.text) + LOOKUP_BLOCK_SIZE - 1) / \
855 LOOKUP_BLOCK_SIZE) + 1) * 4; \
856 orc_lookup_end = .; \
857 }
858#else
859#define ORC_UNWIND_TABLE
860#endif
861
862#ifdef CONFIG_PM_TRACE
863#define TRACEDATA \
864 . = ALIGN(4); \
865 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \
866 __tracedata_start = .; \
867 KEEP(*(.tracedata)) \
868 __tracedata_end = .; \
869 }
870#else
871#define TRACEDATA
872#endif
873
874#define NOTES \
875 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \
876 __start_notes = .; \
877 KEEP(*(.note.*)) \
878 __stop_notes = .; \
879 } NOTES_HEADERS \
880 NOTES_HEADERS_RESTORE
881
882#define INIT_SETUP(initsetup_align) \
883 . = ALIGN(initsetup_align); \
884 __setup_start = .; \
885 KEEP(*(.init.setup)) \
886 __setup_end = .;
887
888#define INIT_CALLS_LEVEL(level) \
889 __initcall##level##_start = .; \
890 KEEP(*(.initcall##level##.init)) \
891 KEEP(*(.initcall##level##s.init)) \
892
893#define INIT_CALLS \
894 __initcall_start = .; \
895 KEEP(*(.initcallearly.init)) \
896 INIT_CALLS_LEVEL(0) \
897 INIT_CALLS_LEVEL(1) \
898 INIT_CALLS_LEVEL(2) \
899 INIT_CALLS_LEVEL(3) \
900 INIT_CALLS_LEVEL(4) \
901 INIT_CALLS_LEVEL(5) \
902 INIT_CALLS_LEVEL(rootfs) \
903 INIT_CALLS_LEVEL(6) \
904 INIT_CALLS_LEVEL(7) \
905 __initcall_end = .;
906
907#define CON_INITCALL \
908 __con_initcall_start = .; \
909 KEEP(*(.con_initcall.init)) \
910 __con_initcall_end = .;
911
912#ifdef CONFIG_BLK_DEV_INITRD
913#define INIT_RAM_FS \
914 . = ALIGN(4); \
915 __initramfs_start = .; \
916 KEEP(*(.init.ramfs)) \
917 . = ALIGN(8); \
918 KEEP(*(.init.ramfs.info))
919#else
920#define INIT_RAM_FS
921#endif
922
923/*
924 * Memory encryption operates on a page basis. Since we need to clear
925 * the memory encryption mask for this section, it needs to be aligned
926 * on a page boundary and be a page-size multiple in length.
927 *
928 * Note: We use a separate section so that only this section gets
929 * decrypted to avoid exposing more than we wish.
930 */
931#ifdef CONFIG_AMD_MEM_ENCRYPT
932#define PERCPU_DECRYPTED_SECTION \
933 . = ALIGN(PAGE_SIZE); \
934 *(.data..percpu..decrypted) \
935 . = ALIGN(PAGE_SIZE);
936#else
937#define PERCPU_DECRYPTED_SECTION
938#endif
939
940
941/*
942 * Default discarded sections.
943 *
944 * Some archs want to discard exit text/data at runtime rather than
945 * link time due to cross-section references such as alt instructions,
946 * bug table, eh_frame, etc. DISCARDS must be the last of output
947 * section definitions so that such archs put those in earlier section
948 * definitions.
949 */
950#ifdef RUNTIME_DISCARD_EXIT
951#define EXIT_DISCARDS
952#else
953#define EXIT_DISCARDS \
954 EXIT_TEXT \
955 EXIT_DATA
956#endif
957
958#define DISCARDS \
959 /DISCARD/ : { \
960 EXIT_DISCARDS \
961 EXIT_CALL \
962 *(.discard) \
963 *(.discard.*) \
964 *(.modinfo) \
965 }
966
967/**
968 * PERCPU_INPUT - the percpu input sections
969 * @cacheline: cacheline size
970 *
971 * The core percpu section names and core symbols which do not rely
972 * directly upon load addresses.
973 *
974 * @cacheline is used to align subsections to avoid false cacheline
975 * sharing between subsections for different purposes.
976 */
977#define PERCPU_INPUT(cacheline) \
978 __per_cpu_start = .; \
979 *(.data..percpu..first) \
980 . = ALIGN(PAGE_SIZE); \
981 *(.data..percpu..page_aligned) \
982 . = ALIGN(cacheline); \
983 *(.data..percpu..read_mostly) \
984 . = ALIGN(cacheline); \
985 *(.data..percpu) \
986 *(.data..percpu..shared_aligned) \
987 PERCPU_DECRYPTED_SECTION \
988 __per_cpu_end = .;
989
990/**
991 * PERCPU_VADDR - define output section for percpu area
992 * @cacheline: cacheline size
993 * @vaddr: explicit base address (optional)
994 * @phdr: destination PHDR (optional)
995 *
996 * Macro which expands to output section for percpu area.
997 *
998 * @cacheline is used to align subsections to avoid false cacheline
999 * sharing between subsections for different purposes.
1000 *
1001 * If @vaddr is not blank, it specifies explicit base address and all
1002 * percpu symbols will be offset from the given address. If blank,
1003 * @vaddr always equals @laddr + LOAD_OFFSET.
1004 *
1005 * @phdr defines the output PHDR to use if not blank. Be warned that
1006 * output PHDR is sticky. If @phdr is specified, the next output
1007 * section in the linker script will go there too. @phdr should have
1008 * a leading colon.
1009 *
1010 * Note that this macros defines __per_cpu_load as an absolute symbol.
1011 * If there is no need to put the percpu section at a predetermined
1012 * address, use PERCPU_SECTION.
1013 */
1014#define PERCPU_VADDR(cacheline, vaddr, phdr) \
1015 __per_cpu_load = .; \
1016 .data..percpu vaddr : AT(__per_cpu_load - LOAD_OFFSET) { \
1017 PERCPU_INPUT(cacheline) \
1018 } phdr \
1019 . = __per_cpu_load + SIZEOF(.data..percpu);
1020
1021/**
1022 * PERCPU_SECTION - define output section for percpu area, simple version
1023 * @cacheline: cacheline size
1024 *
1025 * Align to PAGE_SIZE and outputs output section for percpu area. This
1026 * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and
1027 * __per_cpu_start will be identical.
1028 *
1029 * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,)
1030 * except that __per_cpu_load is defined as a relative symbol against
1031 * .data..percpu which is required for relocatable x86_32 configuration.
1032 */
1033#define PERCPU_SECTION(cacheline) \
1034 . = ALIGN(PAGE_SIZE); \
1035 .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \
1036 __per_cpu_load = .; \
1037 PERCPU_INPUT(cacheline) \
1038 }
1039
1040
1041/*
1042 * Definition of the high level *_SECTION macros
1043 * They will fit only a subset of the architectures
1044 */
1045
1046
1047/*
1048 * Writeable data.
1049 * All sections are combined in a single .data section.
1050 * The sections following CONSTRUCTORS are arranged so their
1051 * typical alignment matches.
1052 * A cacheline is typical/always less than a PAGE_SIZE so
1053 * the sections that has this restriction (or similar)
1054 * is located before the ones requiring PAGE_SIZE alignment.
1055 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
1056 * matches the requirement of PAGE_ALIGNED_DATA.
1057 *
1058 * use 0 as page_align if page_aligned data is not used */
1059#define RW_DATA(cacheline, pagealigned, inittask) \
1060 . = ALIGN(PAGE_SIZE); \
1061 .data : AT(ADDR(.data) - LOAD_OFFSET) { \
1062 INIT_TASK_DATA(inittask) \
1063 NOSAVE_DATA \
1064 PAGE_ALIGNED_DATA(pagealigned) \
1065 CACHELINE_ALIGNED_DATA(cacheline) \
1066 READ_MOSTLY_DATA(cacheline) \
1067 DATA_DATA \
1068 CONSTRUCTORS \
1069 } \
1070 BUG_TABLE \
1071
1072#define INIT_TEXT_SECTION(inittext_align) \
1073 . = ALIGN(inittext_align); \
1074 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \
1075 _sinittext = .; \
1076 INIT_TEXT \
1077 _einittext = .; \
1078 }
1079
1080#define INIT_DATA_SECTION(initsetup_align) \
1081 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \
1082 INIT_DATA \
1083 INIT_SETUP(initsetup_align) \
1084 INIT_CALLS \
1085 CON_INITCALL \
1086 INIT_RAM_FS \
1087 }
1088
1089#define BSS_SECTION(sbss_align, bss_align, stop_align) \
1090 . = ALIGN(sbss_align); \
1091 __bss_start = .; \
1092 SBSS(sbss_align) \
1093 BSS(bss_align) \
1094 . = ALIGN(stop_align); \
1095 __bss_stop = .;