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