| blob | 0968d13b388591ae02b37f9dda0fe7a498cc7475 |
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 */
53 #ifndef LOAD_OFFSET
54 #define LOAD_OFFSET 0
55 #endif
57 #include <linux/export.h>
59 /* Align . to a 8 byte boundary equals to maximum function alignment. */
60 #define ALIGN_FUNCTION() . = ALIGN(8)
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)
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
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
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
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
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
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
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
135 #ifdef CONFIG_TRACING
136 #define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \
138 VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .;
139 #define TRACEPOINT_STR() VMLINUX_SYMBOL(__start___tracepoint_str) = .; \
141 VMLINUX_SYMBOL(__stop___tracepoint_str) = .;
142 #else
143 #define TRACE_PRINTKS()
144 #define TRACEPOINT_STR()
145 #endif
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
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
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))
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)
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
193 #define KERNEL_DTB() \
194 STRUCT_ALIGN(); \
195 VMLINUX_SYMBOL(__dtb_start) = .; \
196 KEEP(*(.dtb.init.rodata)) \
197 VMLINUX_SYMBOL(__dtb_end) = .;
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) \
209 MEM_KEEP(init.data) \
210 MEM_KEEP(exit.data) \
211 *(.data.unlikely) \
212 STRUCT_ALIGN(); \
213 *(__tracepoints) \
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()
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) = .;
238 #define PAGE_ALIGNED_DATA(page_align) \
239 . = ALIGN(page_align); \
240 *(.data..page_aligned)
242 #define READ_MOSTLY_DATA(align) \
243 . = ALIGN(align); \
244 *(.data..read_mostly) \
245 . = ALIGN(align);
247 #define CACHELINE_ALIGNED_DATA(align) \
248 . = ALIGN(align); \
249 *(.data..cacheline_aligned)
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) = .;
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
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.*) \
278 . = ALIGN(8); \
279 VMLINUX_SYMBOL(__start___tracepoints_ptrs) = .; \
281 VMLINUX_SYMBOL(__stop___tracepoints_ptrs) = .; \
283 } \
284 \
285 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \
286 *(.rodata1) \
287 } \
288 \
289 BUG_TABLE \
290 \
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 \
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 \
329 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \
330 VMLINUX_SYMBOL(__start___ksymtab) = .; \
331 KEEP(*(SORT(___ksymtab+*))) \
332 VMLINUX_SYMBOL(__stop___ksymtab) = .; \
333 } \
334 \
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 \
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 \
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 \
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 \
364 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \
365 VMLINUX_SYMBOL(__start___kcrctab) = .; \
366 KEEP(*(SORT(___kcrctab+*))) \
367 VMLINUX_SYMBOL(__stop___kcrctab) = .; \
368 } \
369 \
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 \
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 \
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 \
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 \
399 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
400 *(__ksymtab_strings) \
401 } \
402 \
404 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \
405 *(.ref.rodata) \
406 MEM_KEEP(init.rodata) \
407 MEM_KEEP(exit.rodata) \
408 } \
409 \
411 __param : AT(ADDR(__param) - LOAD_OFFSET) { \
412 VMLINUX_SYMBOL(__start___param) = .; \
413 KEEP(*(__param)) \
414 VMLINUX_SYMBOL(__stop___param) = .; \
415 } \
416 \
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));
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)
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 }
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) \
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) = .;
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) = .;
470 #define CPUIDLE_TEXT \
471 ALIGN_FUNCTION(); \
472 VMLINUX_SYMBOL(__cpuidle_text_start) = .; \
473 *(.cpuidle.text) \
474 VMLINUX_SYMBOL(__cpuidle_text_end) = .;
476 #define KPROBES_TEXT \
477 ALIGN_FUNCTION(); \
478 VMLINUX_SYMBOL(__kprobes_text_start) = .; \
479 *(.kprobes.text) \
480 VMLINUX_SYMBOL(__kprobes_text_end) = .;
482 #define ENTRY_TEXT \
483 ALIGN_FUNCTION(); \
484 VMLINUX_SYMBOL(__entry_text_start) = .; \
485 *(.entry.text) \
486 VMLINUX_SYMBOL(__entry_text_end) = .;
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
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
508 /* Section used for early init (in .S files) */
509 #define HEAD_TEXT *(.head.text)
511 #define HEAD_TEXT_SECTION \
512 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \
513 HEAD_TEXT \
514 }
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 }
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 }
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
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()
572 #define INIT_TEXT \
573 *(.init.text) \
574 *(.text.startup) \
575 MEM_DISCARD(init.text)
577 #define EXIT_DATA \
578 *(.exit.data) \
579 *(.fini_array) \
580 *(.dtors) \
581 MEM_DISCARD(exit.data) \
582 MEM_DISCARD(exit.rodata)
584 #define EXIT_TEXT \
585 *(.exit.text) \
586 *(.text.exit) \
587 MEM_DISCARD(exit.text)
589 #define EXIT_CALL \
590 *(.exitcall.exit)
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 }
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
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 }
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 \
628 .debug 0 : { *(.debug) } \
629 .line 0 : { *(.line) } \
631 .debug_srcinfo 0 : { *(.debug_srcinfo) } \
632 .debug_sfnames 0 : { *(.debug_sfnames) } \
634 .debug_aranges 0 : { *(.debug_aranges) } \
635 .debug_pubnames 0 : { *(.debug_pubnames) } \
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) } \
646 .debug_weaknames 0 : { *(.debug_weaknames) } \
647 .debug_funcnames 0 : { *(.debug_funcnames) } \
648 .debug_typenames 0 : { *(.debug_typenames) } \
649 .debug_varnames 0 : { *(.debug_varnames) } \
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) }
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
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
685 #define NOTES \
686 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \
687 VMLINUX_SYMBOL(__start_notes) = .; \
688 *(.note.*) \
689 VMLINUX_SYMBOL(__stop_notes) = .; \
690 }
692 #define INIT_SETUP(initsetup_align) \
693 . = ALIGN(initsetup_align); \
694 VMLINUX_SYMBOL(__setup_start) = .; \
695 KEEP(*(.init.setup)) \
696 VMLINUX_SYMBOL(__setup_end) = .;
698 #define INIT_CALLS_LEVEL(level) \
699 VMLINUX_SYMBOL(__initcall##level##_start) = .; \
700 KEEP(*(.initcall##level##.init)) \
701 KEEP(*(.initcall##level##s.init)) \
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) = .;
717 #define CON_INITCALL \
718 VMLINUX_SYMBOL(__con_initcall_start) = .; \
719 KEEP(*(.con_initcall.init)) \
720 VMLINUX_SYMBOL(__con_initcall_end) = .;
722 #define SECURITY_INITCALL \
723 VMLINUX_SYMBOL(__security_initcall_start) = .; \
724 KEEP(*(.security_initcall.init)) \
725 VMLINUX_SYMBOL(__security_initcall_end) = .;
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
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 }
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) = .;
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);
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 }
830 /*
831 * Definition of the high level *_SECTION macros
832 * They will fit only a subset of the architectures
833 */
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 }
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 }
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 }
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) = .;