Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * Helper macros to support writing architecture specific
3 * linker scripts.
4 *
5 * A minimal linker scripts has following content:
6 * [This is a sample, architectures may have special requiriements]
7 *
8 * OUTPUT_FORMAT(...)
9 * OUTPUT_ARCH(...)
10 * ENTRY(...)
11 * SECTIONS
12 * {
13 * . = START;
14 * __init_begin = .;
15 * HEAD_TEXT_SECTION
16 * INIT_TEXT_SECTION(PAGE_SIZE)
17 * INIT_DATA_SECTION(...)
18 * PERCPU_SECTION(CACHELINE_SIZE)
19 * __init_end = .;
20 *
21 * _stext = .;
22 * TEXT_SECTION = 0
23 * _etext = .;
24 *
25 * _sdata = .;
26 * RO_DATA_SECTION(PAGE_SIZE)
27 * RW_DATA_SECTION(...)
28 * _edata = .;
29 *
30 * EXCEPTION_TABLE(...)
31 * NOTES
32 *
33 * BSS_SECTION(0, 0, 0)
34 * _end = .;
35 *
36 * STABS_DEBUG
37 * DWARF_DEBUG
38 *
39 * DISCARDS // must be the last
40 * }
41 *
42 * [__init_begin, __init_end] is the init section that may be freed after init
43 * // __init_begin and __init_end should be page aligned, so that we can
44 * // free the whole .init memory
45 * [_stext, _etext] is the text section
46 * [_sdata, _edata] is the data section
47 *
48 * Some of the included output section have their own set of constants.
49 * Examples are: [__initramfs_start, __initramfs_end] for initramfs and
50 * [__nosave_begin, __nosave_end] for the nosave data
51 */
52
53#ifndef LOAD_OFFSET
54#define LOAD_OFFSET 0
55#endif
56
57#include <linux/export.h>
58
59/* Align . to a 8 byte boundary equals to maximum function alignment. */
60#define ALIGN_FUNCTION() . = ALIGN(8)
61
62/*
63 * LD_DEAD_CODE_DATA_ELIMINATION option enables -fdata-sections, which
64 * generates .data.identifier sections, which need to be pulled in with
65 * .data. We don't want to pull in .data..other sections, which Linux
66 * has defined. Same for text and bss.
67 */
68#ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
69#define TEXT_MAIN .text .text.[0-9a-zA-Z_]*
70#define DATA_MAIN .data .data.[0-9a-zA-Z_]*
71#define BSS_MAIN .bss .bss.[0-9a-zA-Z_]*
72#else
73#define TEXT_MAIN .text
74#define DATA_MAIN .data
75#define BSS_MAIN .bss
76#endif
77
78/*
79 * Align to a 32 byte boundary equal to the
80 * alignment gcc 4.5 uses for a struct
81 */
82#define STRUCT_ALIGNMENT 32
83#define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT)
84
85/* The actual configuration determine if the init/exit sections
86 * are handled as text/data or they can be discarded (which
87 * often happens at runtime)
88 */
89#ifdef CONFIG_HOTPLUG_CPU
90#define CPU_KEEP(sec) *(.cpu##sec)
91#define CPU_DISCARD(sec)
92#else
93#define CPU_KEEP(sec)
94#define CPU_DISCARD(sec) *(.cpu##sec)
95#endif
96
97#if defined(CONFIG_MEMORY_HOTPLUG)
98#define MEM_KEEP(sec) *(.mem##sec)
99#define MEM_DISCARD(sec)
100#else
101#define MEM_KEEP(sec)
102#define MEM_DISCARD(sec) *(.mem##sec)
103#endif
104
105#ifdef CONFIG_FTRACE_MCOUNT_RECORD
106#define MCOUNT_REC() . = ALIGN(8); \
107 VMLINUX_SYMBOL(__start_mcount_loc) = .; \
108 *(__mcount_loc) \
109 VMLINUX_SYMBOL(__stop_mcount_loc) = .;
110#else
111#define MCOUNT_REC()
112#endif
113
114#ifdef CONFIG_TRACE_BRANCH_PROFILING
115#define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \
116 *(_ftrace_annotated_branch) \
117 VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .;
118#else
119#define LIKELY_PROFILE()
120#endif
121
122#ifdef CONFIG_PROFILE_ALL_BRANCHES
123#define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \
124 *(_ftrace_branch) \
125 VMLINUX_SYMBOL(__stop_branch_profile) = .;
126#else
127#define BRANCH_PROFILE()
128#endif
129
130#ifdef CONFIG_KPROBES
131#define KPROBE_BLACKLIST() . = ALIGN(8); \
132 VMLINUX_SYMBOL(__start_kprobe_blacklist) = .; \
133 KEEP(*(_kprobe_blacklist)) \
134 VMLINUX_SYMBOL(__stop_kprobe_blacklist) = .;
135#else
136#define KPROBE_BLACKLIST()
137#endif
138
139#ifdef CONFIG_EVENT_TRACING
140#define FTRACE_EVENTS() . = ALIGN(8); \
141 VMLINUX_SYMBOL(__start_ftrace_events) = .; \
142 KEEP(*(_ftrace_events)) \
143 VMLINUX_SYMBOL(__stop_ftrace_events) = .; \
144 VMLINUX_SYMBOL(__start_ftrace_eval_maps) = .; \
145 KEEP(*(_ftrace_eval_map)) \
146 VMLINUX_SYMBOL(__stop_ftrace_eval_maps) = .;
147#else
148#define FTRACE_EVENTS()
149#endif
150
151#ifdef CONFIG_TRACING
152#define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \
153 KEEP(*(__trace_printk_fmt)) /* Trace_printk fmt' pointer */ \
154 VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .;
155#define TRACEPOINT_STR() VMLINUX_SYMBOL(__start___tracepoint_str) = .; \
156 KEEP(*(__tracepoint_str)) /* Trace_printk fmt' pointer */ \
157 VMLINUX_SYMBOL(__stop___tracepoint_str) = .;
158#else
159#define TRACE_PRINTKS()
160#define TRACEPOINT_STR()
161#endif
162
163#ifdef CONFIG_FTRACE_SYSCALLS
164#define TRACE_SYSCALLS() . = ALIGN(8); \
165 VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \
166 KEEP(*(__syscalls_metadata)) \
167 VMLINUX_SYMBOL(__stop_syscalls_metadata) = .;
168#else
169#define TRACE_SYSCALLS()
170#endif
171
172#ifdef CONFIG_SERIAL_EARLYCON
173#define EARLYCON_TABLE() STRUCT_ALIGN(); \
174 VMLINUX_SYMBOL(__earlycon_table) = .; \
175 KEEP(*(__earlycon_table)) \
176 VMLINUX_SYMBOL(__earlycon_table_end) = .;
177#else
178#define EARLYCON_TABLE()
179#endif
180
181#define ___OF_TABLE(cfg, name) _OF_TABLE_##cfg(name)
182#define __OF_TABLE(cfg, name) ___OF_TABLE(cfg, name)
183#define OF_TABLE(cfg, name) __OF_TABLE(IS_ENABLED(cfg), name)
184#define _OF_TABLE_0(name)
185#define _OF_TABLE_1(name) \
186 . = ALIGN(8); \
187 VMLINUX_SYMBOL(__##name##_of_table) = .; \
188 KEEP(*(__##name##_of_table)) \
189 KEEP(*(__##name##_of_table_end))
190
191#define TIMER_OF_TABLES() OF_TABLE(CONFIG_TIMER_OF, timer)
192#define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip)
193#define CLK_OF_TABLES() OF_TABLE(CONFIG_COMMON_CLK, clk)
194#define IOMMU_OF_TABLES() OF_TABLE(CONFIG_OF_IOMMU, iommu)
195#define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem)
196#define CPU_METHOD_OF_TABLES() OF_TABLE(CONFIG_SMP, cpu_method)
197#define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method)
198
199#ifdef CONFIG_ACPI
200#define ACPI_PROBE_TABLE(name) \
201 . = ALIGN(8); \
202 VMLINUX_SYMBOL(__##name##_acpi_probe_table) = .; \
203 KEEP(*(__##name##_acpi_probe_table)) \
204 VMLINUX_SYMBOL(__##name##_acpi_probe_table_end) = .;
205#else
206#define ACPI_PROBE_TABLE(name)
207#endif
208
209#define KERNEL_DTB() \
210 STRUCT_ALIGN(); \
211 VMLINUX_SYMBOL(__dtb_start) = .; \
212 KEEP(*(.dtb.init.rodata)) \
213 VMLINUX_SYMBOL(__dtb_end) = .;
214
215/*
216 * .data section
217 */
218#define DATA_DATA \
219 *(.xiptext) \
220 *(DATA_MAIN) \
221 *(.ref.data) \
222 *(.data..shared_aligned) /* percpu related */ \
223 MEM_KEEP(init.data) \
224 MEM_KEEP(exit.data) \
225 *(.data.unlikely) \
226 STRUCT_ALIGN(); \
227 *(__tracepoints) \
228 /* implement dynamic printk debug */ \
229 . = ALIGN(8); \
230 VMLINUX_SYMBOL(__start___jump_table) = .; \
231 KEEP(*(__jump_table)) \
232 VMLINUX_SYMBOL(__stop___jump_table) = .; \
233 . = ALIGN(8); \
234 VMLINUX_SYMBOL(__start___verbose) = .; \
235 KEEP(*(__verbose)) \
236 VMLINUX_SYMBOL(__stop___verbose) = .; \
237 LIKELY_PROFILE() \
238 BRANCH_PROFILE() \
239 TRACE_PRINTKS() \
240 TRACEPOINT_STR()
241
242/*
243 * Data section helpers
244 */
245#define NOSAVE_DATA \
246 . = ALIGN(PAGE_SIZE); \
247 VMLINUX_SYMBOL(__nosave_begin) = .; \
248 *(.data..nosave) \
249 . = ALIGN(PAGE_SIZE); \
250 VMLINUX_SYMBOL(__nosave_end) = .;
251
252#define PAGE_ALIGNED_DATA(page_align) \
253 . = ALIGN(page_align); \
254 *(.data..page_aligned)
255
256#define READ_MOSTLY_DATA(align) \
257 . = ALIGN(align); \
258 *(.data..read_mostly) \
259 . = ALIGN(align);
260
261#define CACHELINE_ALIGNED_DATA(align) \
262 . = ALIGN(align); \
263 *(.data..cacheline_aligned)
264
265#define INIT_TASK_DATA(align) \
266 . = ALIGN(align); \
267 VMLINUX_SYMBOL(__start_init_task) = .; \
268 *(.data..init_task) \
269 VMLINUX_SYMBOL(__end_init_task) = .;
270
271/*
272 * Allow architectures to handle ro_after_init data on their
273 * own by defining an empty RO_AFTER_INIT_DATA.
274 */
275#ifndef RO_AFTER_INIT_DATA
276#define RO_AFTER_INIT_DATA \
277 VMLINUX_SYMBOL(__start_ro_after_init) = .; \
278 *(.data..ro_after_init) \
279 VMLINUX_SYMBOL(__end_ro_after_init) = .;
280#endif
281
282/*
283 * Read only Data
284 */
285#define RO_DATA_SECTION(align) \
286 . = ALIGN((align)); \
287 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \
288 VMLINUX_SYMBOL(__start_rodata) = .; \
289 *(.rodata) *(.rodata.*) \
290 RO_AFTER_INIT_DATA /* Read only after init */ \
291 KEEP(*(__vermagic)) /* Kernel version magic */ \
292 . = ALIGN(8); \
293 VMLINUX_SYMBOL(__start___tracepoints_ptrs) = .; \
294 KEEP(*(__tracepoints_ptrs)) /* Tracepoints: pointer array */ \
295 VMLINUX_SYMBOL(__stop___tracepoints_ptrs) = .; \
296 *(__tracepoints_strings)/* Tracepoints: strings */ \
297 } \
298 \
299 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \
300 *(.rodata1) \
301 } \
302 \
303 /* PCI quirks */ \
304 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \
305 VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \
306 KEEP(*(.pci_fixup_early)) \
307 VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \
308 VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \
309 KEEP(*(.pci_fixup_header)) \
310 VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \
311 VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \
312 KEEP(*(.pci_fixup_final)) \
313 VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \
314 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \
315 KEEP(*(.pci_fixup_enable)) \
316 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \
317 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \
318 KEEP(*(.pci_fixup_resume)) \
319 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \
320 VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \
321 KEEP(*(.pci_fixup_resume_early)) \
322 VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \
323 VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \
324 KEEP(*(.pci_fixup_suspend)) \
325 VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \
326 VMLINUX_SYMBOL(__start_pci_fixups_suspend_late) = .; \
327 KEEP(*(.pci_fixup_suspend_late)) \
328 VMLINUX_SYMBOL(__end_pci_fixups_suspend_late) = .; \
329 } \
330 \
331 /* Built-in firmware blobs */ \
332 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \
333 VMLINUX_SYMBOL(__start_builtin_fw) = .; \
334 KEEP(*(.builtin_fw)) \
335 VMLINUX_SYMBOL(__end_builtin_fw) = .; \
336 } \
337 \
338 TRACEDATA \
339 \
340 /* Kernel symbol table: Normal symbols */ \
341 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \
342 VMLINUX_SYMBOL(__start___ksymtab) = .; \
343 KEEP(*(SORT(___ksymtab+*))) \
344 VMLINUX_SYMBOL(__stop___ksymtab) = .; \
345 } \
346 \
347 /* Kernel symbol table: GPL-only symbols */ \
348 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \
349 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \
350 KEEP(*(SORT(___ksymtab_gpl+*))) \
351 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \
352 } \
353 \
354 /* Kernel symbol table: Normal unused symbols */ \
355 __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \
356 VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \
357 KEEP(*(SORT(___ksymtab_unused+*))) \
358 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \
359 } \
360 \
361 /* Kernel symbol table: GPL-only unused symbols */ \
362 __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
363 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \
364 KEEP(*(SORT(___ksymtab_unused_gpl+*))) \
365 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \
366 } \
367 \
368 /* Kernel symbol table: GPL-future-only symbols */ \
369 __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
370 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \
371 KEEP(*(SORT(___ksymtab_gpl_future+*))) \
372 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \
373 } \
374 \
375 /* Kernel symbol table: Normal symbols */ \
376 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \
377 VMLINUX_SYMBOL(__start___kcrctab) = .; \
378 KEEP(*(SORT(___kcrctab+*))) \
379 VMLINUX_SYMBOL(__stop___kcrctab) = .; \
380 } \
381 \
382 /* Kernel symbol table: GPL-only symbols */ \
383 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \
384 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \
385 KEEP(*(SORT(___kcrctab_gpl+*))) \
386 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \
387 } \
388 \
389 /* Kernel symbol table: Normal unused symbols */ \
390 __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \
391 VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \
392 KEEP(*(SORT(___kcrctab_unused+*))) \
393 VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \
394 } \
395 \
396 /* Kernel symbol table: GPL-only unused symbols */ \
397 __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
398 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \
399 KEEP(*(SORT(___kcrctab_unused_gpl+*))) \
400 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \
401 } \
402 \
403 /* Kernel symbol table: GPL-future-only symbols */ \
404 __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
405 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \
406 KEEP(*(SORT(___kcrctab_gpl_future+*))) \
407 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \
408 } \
409 \
410 /* Kernel symbol table: strings */ \
411 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
412 *(__ksymtab_strings) \
413 } \
414 \
415 /* __*init sections */ \
416 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \
417 *(.ref.rodata) \
418 MEM_KEEP(init.rodata) \
419 MEM_KEEP(exit.rodata) \
420 } \
421 \
422 /* Built-in module parameters. */ \
423 __param : AT(ADDR(__param) - LOAD_OFFSET) { \
424 VMLINUX_SYMBOL(__start___param) = .; \
425 KEEP(*(__param)) \
426 VMLINUX_SYMBOL(__stop___param) = .; \
427 } \
428 \
429 /* Built-in module versions. */ \
430 __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \
431 VMLINUX_SYMBOL(__start___modver) = .; \
432 KEEP(*(__modver)) \
433 VMLINUX_SYMBOL(__stop___modver) = .; \
434 . = ALIGN((align)); \
435 VMLINUX_SYMBOL(__end_rodata) = .; \
436 } \
437 . = ALIGN((align));
438
439/* RODATA & RO_DATA provided for backward compatibility.
440 * All archs are supposed to use RO_DATA() */
441#define RODATA RO_DATA_SECTION(4096)
442#define RO_DATA(align) RO_DATA_SECTION(align)
443
444#define SECURITY_INIT \
445 .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
446 VMLINUX_SYMBOL(__security_initcall_start) = .; \
447 KEEP(*(.security_initcall.init)) \
448 VMLINUX_SYMBOL(__security_initcall_end) = .; \
449 }
450
451/*
452 * .text section. Map to function alignment to avoid address changes
453 * during second ld run in second ld pass when generating System.map
454 *
455 * TEXT_MAIN here will match .text.fixup and .text.unlikely if dead
456 * code elimination is enabled, so these sections should be converted
457 * to use ".." first.
458 */
459#define TEXT_TEXT \
460 ALIGN_FUNCTION(); \
461 *(.text.hot TEXT_MAIN .text.fixup .text.unlikely) \
462 *(.ref.text) \
463 MEM_KEEP(init.text) \
464 MEM_KEEP(exit.text) \
465
466
467/* sched.text is aling to function alignment to secure we have same
468 * address even at second ld pass when generating System.map */
469#define SCHED_TEXT \
470 ALIGN_FUNCTION(); \
471 VMLINUX_SYMBOL(__sched_text_start) = .; \
472 *(.sched.text) \
473 VMLINUX_SYMBOL(__sched_text_end) = .;
474
475/* spinlock.text is aling to function alignment to secure we have same
476 * address even at second ld pass when generating System.map */
477#define LOCK_TEXT \
478 ALIGN_FUNCTION(); \
479 VMLINUX_SYMBOL(__lock_text_start) = .; \
480 *(.spinlock.text) \
481 VMLINUX_SYMBOL(__lock_text_end) = .;
482
483#define CPUIDLE_TEXT \
484 ALIGN_FUNCTION(); \
485 VMLINUX_SYMBOL(__cpuidle_text_start) = .; \
486 *(.cpuidle.text) \
487 VMLINUX_SYMBOL(__cpuidle_text_end) = .;
488
489#define KPROBES_TEXT \
490 ALIGN_FUNCTION(); \
491 VMLINUX_SYMBOL(__kprobes_text_start) = .; \
492 *(.kprobes.text) \
493 VMLINUX_SYMBOL(__kprobes_text_end) = .;
494
495#define ENTRY_TEXT \
496 ALIGN_FUNCTION(); \
497 VMLINUX_SYMBOL(__entry_text_start) = .; \
498 *(.entry.text) \
499 VMLINUX_SYMBOL(__entry_text_end) = .;
500
501#define IRQENTRY_TEXT \
502 ALIGN_FUNCTION(); \
503 VMLINUX_SYMBOL(__irqentry_text_start) = .; \
504 *(.irqentry.text) \
505 VMLINUX_SYMBOL(__irqentry_text_end) = .;
506
507#define SOFTIRQENTRY_TEXT \
508 ALIGN_FUNCTION(); \
509 VMLINUX_SYMBOL(__softirqentry_text_start) = .; \
510 *(.softirqentry.text) \
511 VMLINUX_SYMBOL(__softirqentry_text_end) = .;
512
513/* Section used for early init (in .S files) */
514#define HEAD_TEXT *(.head.text)
515
516#define HEAD_TEXT_SECTION \
517 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \
518 HEAD_TEXT \
519 }
520
521/*
522 * Exception table
523 */
524#define EXCEPTION_TABLE(align) \
525 . = ALIGN(align); \
526 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \
527 VMLINUX_SYMBOL(__start___ex_table) = .; \
528 KEEP(*(__ex_table)) \
529 VMLINUX_SYMBOL(__stop___ex_table) = .; \
530 }
531
532/*
533 * Init task
534 */
535#define INIT_TASK_DATA_SECTION(align) \
536 . = ALIGN(align); \
537 .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \
538 INIT_TASK_DATA(align) \
539 }
540
541#ifdef CONFIG_CONSTRUCTORS
542#define KERNEL_CTORS() . = ALIGN(8); \
543 VMLINUX_SYMBOL(__ctors_start) = .; \
544 KEEP(*(.ctors)) \
545 KEEP(*(SORT(.init_array.*))) \
546 KEEP(*(.init_array)) \
547 VMLINUX_SYMBOL(__ctors_end) = .;
548#else
549#define KERNEL_CTORS()
550#endif
551
552/* init and exit section handling */
553#define INIT_DATA \
554 KEEP(*(SORT(___kentry+*))) \
555 *(.init.data) \
556 MEM_DISCARD(init.data) \
557 KERNEL_CTORS() \
558 MCOUNT_REC() \
559 *(.init.rodata) \
560 FTRACE_EVENTS() \
561 TRACE_SYSCALLS() \
562 KPROBE_BLACKLIST() \
563 MEM_DISCARD(init.rodata) \
564 CLK_OF_TABLES() \
565 RESERVEDMEM_OF_TABLES() \
566 TIMER_OF_TABLES() \
567 IOMMU_OF_TABLES() \
568 CPU_METHOD_OF_TABLES() \
569 CPUIDLE_METHOD_OF_TABLES() \
570 KERNEL_DTB() \
571 IRQCHIP_OF_MATCH_TABLE() \
572 ACPI_PROBE_TABLE(irqchip) \
573 ACPI_PROBE_TABLE(timer) \
574 ACPI_PROBE_TABLE(iort) \
575 EARLYCON_TABLE()
576
577#define INIT_TEXT \
578 *(.init.text) \
579 *(.text.startup) \
580 MEM_DISCARD(init.text)
581
582#define EXIT_DATA \
583 *(.exit.data) \
584 *(.fini_array) \
585 *(.dtors) \
586 MEM_DISCARD(exit.data) \
587 MEM_DISCARD(exit.rodata)
588
589#define EXIT_TEXT \
590 *(.exit.text) \
591 *(.text.exit) \
592 MEM_DISCARD(exit.text)
593
594#define EXIT_CALL \
595 *(.exitcall.exit)
596
597/*
598 * bss (Block Started by Symbol) - uninitialized data
599 * zeroed during startup
600 */
601#define SBSS(sbss_align) \
602 . = ALIGN(sbss_align); \
603 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \
604 *(.dynsbss) \
605 *(.sbss) \
606 *(.scommon) \
607 }
608
609/*
610 * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra
611 * sections to the front of bss.
612 */
613#ifndef BSS_FIRST_SECTIONS
614#define BSS_FIRST_SECTIONS
615#endif
616
617#define BSS(bss_align) \
618 . = ALIGN(bss_align); \
619 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \
620 BSS_FIRST_SECTIONS \
621 *(.bss..page_aligned) \
622 *(.dynbss) \
623 *(BSS_MAIN) \
624 *(COMMON) \
625 }
626
627/*
628 * DWARF debug sections.
629 * Symbols in the DWARF debugging sections are relative to
630 * the beginning of the section so we begin them at 0.
631 */
632#define DWARF_DEBUG \
633 /* DWARF 1 */ \
634 .debug 0 : { *(.debug) } \
635 .line 0 : { *(.line) } \
636 /* GNU DWARF 1 extensions */ \
637 .debug_srcinfo 0 : { *(.debug_srcinfo) } \
638 .debug_sfnames 0 : { *(.debug_sfnames) } \
639 /* DWARF 1.1 and DWARF 2 */ \
640 .debug_aranges 0 : { *(.debug_aranges) } \
641 .debug_pubnames 0 : { *(.debug_pubnames) } \
642 /* DWARF 2 */ \
643 .debug_info 0 : { *(.debug_info \
644 .gnu.linkonce.wi.*) } \
645 .debug_abbrev 0 : { *(.debug_abbrev) } \
646 .debug_line 0 : { *(.debug_line) } \
647 .debug_frame 0 : { *(.debug_frame) } \
648 .debug_str 0 : { *(.debug_str) } \
649 .debug_loc 0 : { *(.debug_loc) } \
650 .debug_macinfo 0 : { *(.debug_macinfo) } \
651 .debug_pubtypes 0 : { *(.debug_pubtypes) } \
652 /* DWARF 3 */ \
653 .debug_ranges 0 : { *(.debug_ranges) } \
654 /* SGI/MIPS DWARF 2 extensions */ \
655 .debug_weaknames 0 : { *(.debug_weaknames) } \
656 .debug_funcnames 0 : { *(.debug_funcnames) } \
657 .debug_typenames 0 : { *(.debug_typenames) } \
658 .debug_varnames 0 : { *(.debug_varnames) } \
659 /* GNU DWARF 2 extensions */ \
660 .debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) } \
661 .debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) } \
662 /* DWARF 4 */ \
663 .debug_types 0 : { *(.debug_types) } \
664 /* DWARF 5 */ \
665 .debug_macro 0 : { *(.debug_macro) } \
666 .debug_addr 0 : { *(.debug_addr) }
667
668 /* Stabs debugging sections. */
669#define STABS_DEBUG \
670 .stab 0 : { *(.stab) } \
671 .stabstr 0 : { *(.stabstr) } \
672 .stab.excl 0 : { *(.stab.excl) } \
673 .stab.exclstr 0 : { *(.stab.exclstr) } \
674 .stab.index 0 : { *(.stab.index) } \
675 .stab.indexstr 0 : { *(.stab.indexstr) } \
676 .comment 0 : { *(.comment) }
677
678#ifdef CONFIG_GENERIC_BUG
679#define BUG_TABLE \
680 . = ALIGN(8); \
681 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \
682 VMLINUX_SYMBOL(__start___bug_table) = .; \
683 KEEP(*(__bug_table)) \
684 VMLINUX_SYMBOL(__stop___bug_table) = .; \
685 }
686#else
687#define BUG_TABLE
688#endif
689
690#ifdef CONFIG_ORC_UNWINDER
691#define ORC_UNWIND_TABLE \
692 . = ALIGN(4); \
693 .orc_unwind_ip : AT(ADDR(.orc_unwind_ip) - LOAD_OFFSET) { \
694 VMLINUX_SYMBOL(__start_orc_unwind_ip) = .; \
695 KEEP(*(.orc_unwind_ip)) \
696 VMLINUX_SYMBOL(__stop_orc_unwind_ip) = .; \
697 } \
698 . = ALIGN(6); \
699 .orc_unwind : AT(ADDR(.orc_unwind) - LOAD_OFFSET) { \
700 VMLINUX_SYMBOL(__start_orc_unwind) = .; \
701 KEEP(*(.orc_unwind)) \
702 VMLINUX_SYMBOL(__stop_orc_unwind) = .; \
703 } \
704 . = ALIGN(4); \
705 .orc_lookup : AT(ADDR(.orc_lookup) - LOAD_OFFSET) { \
706 VMLINUX_SYMBOL(orc_lookup) = .; \
707 . += (((SIZEOF(.text) + LOOKUP_BLOCK_SIZE - 1) / \
708 LOOKUP_BLOCK_SIZE) + 1) * 4; \
709 VMLINUX_SYMBOL(orc_lookup_end) = .; \
710 }
711#else
712#define ORC_UNWIND_TABLE
713#endif
714
715#ifdef CONFIG_PM_TRACE
716#define TRACEDATA \
717 . = ALIGN(4); \
718 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \
719 VMLINUX_SYMBOL(__tracedata_start) = .; \
720 KEEP(*(.tracedata)) \
721 VMLINUX_SYMBOL(__tracedata_end) = .; \
722 }
723#else
724#define TRACEDATA
725#endif
726
727#define NOTES \
728 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \
729 VMLINUX_SYMBOL(__start_notes) = .; \
730 *(.note.*) \
731 VMLINUX_SYMBOL(__stop_notes) = .; \
732 }
733
734#define INIT_SETUP(initsetup_align) \
735 . = ALIGN(initsetup_align); \
736 VMLINUX_SYMBOL(__setup_start) = .; \
737 KEEP(*(.init.setup)) \
738 VMLINUX_SYMBOL(__setup_end) = .;
739
740#define INIT_CALLS_LEVEL(level) \
741 VMLINUX_SYMBOL(__initcall##level##_start) = .; \
742 KEEP(*(.initcall##level##.init)) \
743 KEEP(*(.initcall##level##s.init)) \
744
745#define INIT_CALLS \
746 VMLINUX_SYMBOL(__initcall_start) = .; \
747 KEEP(*(.initcallearly.init)) \
748 INIT_CALLS_LEVEL(0) \
749 INIT_CALLS_LEVEL(1) \
750 INIT_CALLS_LEVEL(2) \
751 INIT_CALLS_LEVEL(3) \
752 INIT_CALLS_LEVEL(4) \
753 INIT_CALLS_LEVEL(5) \
754 INIT_CALLS_LEVEL(rootfs) \
755 INIT_CALLS_LEVEL(6) \
756 INIT_CALLS_LEVEL(7) \
757 VMLINUX_SYMBOL(__initcall_end) = .;
758
759#define CON_INITCALL \
760 VMLINUX_SYMBOL(__con_initcall_start) = .; \
761 KEEP(*(.con_initcall.init)) \
762 VMLINUX_SYMBOL(__con_initcall_end) = .;
763
764#define SECURITY_INITCALL \
765 VMLINUX_SYMBOL(__security_initcall_start) = .; \
766 KEEP(*(.security_initcall.init)) \
767 VMLINUX_SYMBOL(__security_initcall_end) = .;
768
769#ifdef CONFIG_BLK_DEV_INITRD
770#define INIT_RAM_FS \
771 . = ALIGN(4); \
772 VMLINUX_SYMBOL(__initramfs_start) = .; \
773 KEEP(*(.init.ramfs)) \
774 . = ALIGN(8); \
775 KEEP(*(.init.ramfs.info))
776#else
777#define INIT_RAM_FS
778#endif
779
780/*
781 * Default discarded sections.
782 *
783 * Some archs want to discard exit text/data at runtime rather than
784 * link time due to cross-section references such as alt instructions,
785 * bug table, eh_frame, etc. DISCARDS must be the last of output
786 * section definitions so that such archs put those in earlier section
787 * definitions.
788 */
789#define DISCARDS \
790 /DISCARD/ : { \
791 EXIT_TEXT \
792 EXIT_DATA \
793 EXIT_CALL \
794 *(.discard) \
795 *(.discard.*) \
796 }
797
798/**
799 * PERCPU_INPUT - the percpu input sections
800 * @cacheline: cacheline size
801 *
802 * The core percpu section names and core symbols which do not rely
803 * directly upon load addresses.
804 *
805 * @cacheline is used to align subsections to avoid false cacheline
806 * sharing between subsections for different purposes.
807 */
808#define PERCPU_INPUT(cacheline) \
809 VMLINUX_SYMBOL(__per_cpu_start) = .; \
810 *(.data..percpu..first) \
811 . = ALIGN(PAGE_SIZE); \
812 *(.data..percpu..page_aligned) \
813 . = ALIGN(cacheline); \
814 *(.data..percpu..read_mostly) \
815 . = ALIGN(cacheline); \
816 *(.data..percpu) \
817 *(.data..percpu..shared_aligned) \
818 VMLINUX_SYMBOL(__per_cpu_end) = .;
819
820/**
821 * PERCPU_VADDR - define output section for percpu area
822 * @cacheline: cacheline size
823 * @vaddr: explicit base address (optional)
824 * @phdr: destination PHDR (optional)
825 *
826 * Macro which expands to output section for percpu area.
827 *
828 * @cacheline is used to align subsections to avoid false cacheline
829 * sharing between subsections for different purposes.
830 *
831 * If @vaddr is not blank, it specifies explicit base address and all
832 * percpu symbols will be offset from the given address. If blank,
833 * @vaddr always equals @laddr + LOAD_OFFSET.
834 *
835 * @phdr defines the output PHDR to use if not blank. Be warned that
836 * output PHDR is sticky. If @phdr is specified, the next output
837 * section in the linker script will go there too. @phdr should have
838 * a leading colon.
839 *
840 * Note that this macros defines __per_cpu_load as an absolute symbol.
841 * If there is no need to put the percpu section at a predetermined
842 * address, use PERCPU_SECTION.
843 */
844#define PERCPU_VADDR(cacheline, vaddr, phdr) \
845 VMLINUX_SYMBOL(__per_cpu_load) = .; \
846 .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \
847 - LOAD_OFFSET) { \
848 PERCPU_INPUT(cacheline) \
849 } phdr \
850 . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu);
851
852/**
853 * PERCPU_SECTION - define output section for percpu area, simple version
854 * @cacheline: cacheline size
855 *
856 * Align to PAGE_SIZE and outputs output section for percpu area. This
857 * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and
858 * __per_cpu_start will be identical.
859 *
860 * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,)
861 * except that __per_cpu_load is defined as a relative symbol against
862 * .data..percpu which is required for relocatable x86_32 configuration.
863 */
864#define PERCPU_SECTION(cacheline) \
865 . = ALIGN(PAGE_SIZE); \
866 .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \
867 VMLINUX_SYMBOL(__per_cpu_load) = .; \
868 PERCPU_INPUT(cacheline) \
869 }
870
871
872/*
873 * Definition of the high level *_SECTION macros
874 * They will fit only a subset of the architectures
875 */
876
877
878/*
879 * Writeable data.
880 * All sections are combined in a single .data section.
881 * The sections following CONSTRUCTORS are arranged so their
882 * typical alignment matches.
883 * A cacheline is typical/always less than a PAGE_SIZE so
884 * the sections that has this restriction (or similar)
885 * is located before the ones requiring PAGE_SIZE alignment.
886 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
887 * matches the requirement of PAGE_ALIGNED_DATA.
888 *
889 * use 0 as page_align if page_aligned data is not used */
890#define RW_DATA_SECTION(cacheline, pagealigned, inittask) \
891 . = ALIGN(PAGE_SIZE); \
892 .data : AT(ADDR(.data) - LOAD_OFFSET) { \
893 INIT_TASK_DATA(inittask) \
894 NOSAVE_DATA \
895 PAGE_ALIGNED_DATA(pagealigned) \
896 CACHELINE_ALIGNED_DATA(cacheline) \
897 READ_MOSTLY_DATA(cacheline) \
898 DATA_DATA \
899 CONSTRUCTORS \
900 } \
901 BUG_TABLE \
902
903#define INIT_TEXT_SECTION(inittext_align) \
904 . = ALIGN(inittext_align); \
905 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \
906 VMLINUX_SYMBOL(_sinittext) = .; \
907 INIT_TEXT \
908 VMLINUX_SYMBOL(_einittext) = .; \
909 }
910
911#define INIT_DATA_SECTION(initsetup_align) \
912 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \
913 INIT_DATA \
914 INIT_SETUP(initsetup_align) \
915 INIT_CALLS \
916 CON_INITCALL \
917 SECURITY_INITCALL \
918 INIT_RAM_FS \
919 }
920
921#define BSS_SECTION(sbss_align, bss_align, stop_align) \
922 . = ALIGN(sbss_align); \
923 VMLINUX_SYMBOL(__bss_start) = .; \
924 SBSS(sbss_align) \
925 BSS(bss_align) \
926 . = ALIGN(stop_align); \
927 VMLINUX_SYMBOL(__bss_stop) = .;