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Merge branches 'acpi-soc', 'acpi-misc', 'acpi-pci' and 'device-properties'
[deliverable/linux.git] / include / asm-generic / vmlinux.lds.h
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 *(_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 *(_ftrace_events) \
127 VMLINUX_SYMBOL(__stop_ftrace_events) = .; \
128 VMLINUX_SYMBOL(__start_ftrace_enum_maps) = .; \
129 *(_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 *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \
138 VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .;
139 #define TRACEPOINT_STR() VMLINUX_SYMBOL(__start___tracepoint_str) = .; \
140 *(__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 *(__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 *(__earlycon_table) \
160 *(__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(config_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 *(__##name##_of_table) \
173 *(__##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 #define EARLYCON_OF_TABLES() OF_TABLE(CONFIG_SERIAL_EARLYCON, earlycon)
183
184 #ifdef CONFIG_ACPI
185 #define ACPI_PROBE_TABLE(name) \
186 . = ALIGN(8); \
187 VMLINUX_SYMBOL(__##name##_acpi_probe_table) = .; \
188 *(__##name##_acpi_probe_table) \
189 VMLINUX_SYMBOL(__##name##_acpi_probe_table_end) = .;
190 #else
191 #define ACPI_PROBE_TABLE(name)
192 #endif
193
194 #define KERNEL_DTB() \
195 STRUCT_ALIGN(); \
196 VMLINUX_SYMBOL(__dtb_start) = .; \
197 *(.dtb.init.rodata) \
198 VMLINUX_SYMBOL(__dtb_end) = .;
199
200 /* .data section */
201 #define DATA_DATA \
202 *(.data) \
203 *(.ref.data) \
204 *(.data..shared_aligned) /* percpu related */ \
205 MEM_KEEP(init.data) \
206 MEM_KEEP(exit.data) \
207 *(.data.unlikely) \
208 STRUCT_ALIGN(); \
209 *(__tracepoints) \
210 /* implement dynamic printk debug */ \
211 . = ALIGN(8); \
212 VMLINUX_SYMBOL(__start___jump_table) = .; \
213 *(__jump_table) \
214 VMLINUX_SYMBOL(__stop___jump_table) = .; \
215 . = ALIGN(8); \
216 VMLINUX_SYMBOL(__start___verbose) = .; \
217 *(__verbose) \
218 VMLINUX_SYMBOL(__stop___verbose) = .; \
219 LIKELY_PROFILE() \
220 BRANCH_PROFILE() \
221 TRACE_PRINTKS() \
222 TRACEPOINT_STR()
223
224 /*
225 * Data section helpers
226 */
227 #define NOSAVE_DATA \
228 . = ALIGN(PAGE_SIZE); \
229 VMLINUX_SYMBOL(__nosave_begin) = .; \
230 *(.data..nosave) \
231 . = ALIGN(PAGE_SIZE); \
232 VMLINUX_SYMBOL(__nosave_end) = .;
233
234 #define PAGE_ALIGNED_DATA(page_align) \
235 . = ALIGN(page_align); \
236 *(.data..page_aligned)
237
238 #define READ_MOSTLY_DATA(align) \
239 . = ALIGN(align); \
240 *(.data..read_mostly) \
241 . = ALIGN(align);
242
243 #define CACHELINE_ALIGNED_DATA(align) \
244 . = ALIGN(align); \
245 *(.data..cacheline_aligned)
246
247 #define INIT_TASK_DATA(align) \
248 . = ALIGN(align); \
249 *(.data..init_task)
250
251 /*
252 * Read only Data
253 */
254 #define RO_DATA_SECTION(align) \
255 . = ALIGN((align)); \
256 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \
257 VMLINUX_SYMBOL(__start_rodata) = .; \
258 *(.rodata) *(.rodata.*) \
259 *(.data..ro_after_init) /* Read only after init */ \
260 *(__vermagic) /* Kernel version magic */ \
261 . = ALIGN(8); \
262 VMLINUX_SYMBOL(__start___tracepoints_ptrs) = .; \
263 *(__tracepoints_ptrs) /* Tracepoints: pointer array */\
264 VMLINUX_SYMBOL(__stop___tracepoints_ptrs) = .; \
265 *(__tracepoints_strings)/* Tracepoints: strings */ \
266 } \
267 \
268 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \
269 *(.rodata1) \
270 } \
271 \
272 BUG_TABLE \
273 \
274 /* PCI quirks */ \
275 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \
276 VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \
277 *(.pci_fixup_early) \
278 VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \
279 VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \
280 *(.pci_fixup_header) \
281 VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \
282 VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \
283 *(.pci_fixup_final) \
284 VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \
285 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \
286 *(.pci_fixup_enable) \
287 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \
288 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \
289 *(.pci_fixup_resume) \
290 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \
291 VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \
292 *(.pci_fixup_resume_early) \
293 VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \
294 VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \
295 *(.pci_fixup_suspend) \
296 VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \
297 VMLINUX_SYMBOL(__start_pci_fixups_suspend_late) = .; \
298 *(.pci_fixup_suspend_late) \
299 VMLINUX_SYMBOL(__end_pci_fixups_suspend_late) = .; \
300 } \
301 \
302 /* Built-in firmware blobs */ \
303 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \
304 VMLINUX_SYMBOL(__start_builtin_fw) = .; \
305 *(.builtin_fw) \
306 VMLINUX_SYMBOL(__end_builtin_fw) = .; \
307 } \
308 \
309 TRACEDATA \
310 \
311 /* Kernel symbol table: Normal symbols */ \
312 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \
313 VMLINUX_SYMBOL(__start___ksymtab) = .; \
314 *(SORT(___ksymtab+*)) \
315 VMLINUX_SYMBOL(__stop___ksymtab) = .; \
316 } \
317 \
318 /* Kernel symbol table: GPL-only symbols */ \
319 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \
320 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \
321 *(SORT(___ksymtab_gpl+*)) \
322 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \
323 } \
324 \
325 /* Kernel symbol table: Normal unused symbols */ \
326 __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \
327 VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \
328 *(SORT(___ksymtab_unused+*)) \
329 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \
330 } \
331 \
332 /* Kernel symbol table: GPL-only unused symbols */ \
333 __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
334 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \
335 *(SORT(___ksymtab_unused_gpl+*)) \
336 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \
337 } \
338 \
339 /* Kernel symbol table: GPL-future-only symbols */ \
340 __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
341 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \
342 *(SORT(___ksymtab_gpl_future+*)) \
343 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \
344 } \
345 \
346 /* Kernel symbol table: Normal symbols */ \
347 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \
348 VMLINUX_SYMBOL(__start___kcrctab) = .; \
349 *(SORT(___kcrctab+*)) \
350 VMLINUX_SYMBOL(__stop___kcrctab) = .; \
351 } \
352 \
353 /* Kernel symbol table: GPL-only symbols */ \
354 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \
355 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \
356 *(SORT(___kcrctab_gpl+*)) \
357 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \
358 } \
359 \
360 /* Kernel symbol table: Normal unused symbols */ \
361 __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \
362 VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \
363 *(SORT(___kcrctab_unused+*)) \
364 VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \
365 } \
366 \
367 /* Kernel symbol table: GPL-only unused symbols */ \
368 __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
369 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \
370 *(SORT(___kcrctab_unused_gpl+*)) \
371 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \
372 } \
373 \
374 /* Kernel symbol table: GPL-future-only symbols */ \
375 __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
376 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \
377 *(SORT(___kcrctab_gpl_future+*)) \
378 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \
379 } \
380 \
381 /* Kernel symbol table: strings */ \
382 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
383 *(__ksymtab_strings) \
384 } \
385 \
386 /* __*init sections */ \
387 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \
388 *(.ref.rodata) \
389 MEM_KEEP(init.rodata) \
390 MEM_KEEP(exit.rodata) \
391 } \
392 \
393 /* Built-in module parameters. */ \
394 __param : AT(ADDR(__param) - LOAD_OFFSET) { \
395 VMLINUX_SYMBOL(__start___param) = .; \
396 *(__param) \
397 VMLINUX_SYMBOL(__stop___param) = .; \
398 } \
399 \
400 /* Built-in module versions. */ \
401 __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \
402 VMLINUX_SYMBOL(__start___modver) = .; \
403 *(__modver) \
404 VMLINUX_SYMBOL(__stop___modver) = .; \
405 . = ALIGN((align)); \
406 VMLINUX_SYMBOL(__end_rodata) = .; \
407 } \
408 . = ALIGN((align));
409
410 /* RODATA & RO_DATA provided for backward compatibility.
411 * All archs are supposed to use RO_DATA() */
412 #define RODATA RO_DATA_SECTION(4096)
413 #define RO_DATA(align) RO_DATA_SECTION(align)
414
415 #define SECURITY_INIT \
416 .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
417 VMLINUX_SYMBOL(__security_initcall_start) = .; \
418 *(.security_initcall.init) \
419 VMLINUX_SYMBOL(__security_initcall_end) = .; \
420 }
421
422 /* .text section. Map to function alignment to avoid address changes
423 * during second ld run in second ld pass when generating System.map */
424 #define TEXT_TEXT \
425 ALIGN_FUNCTION(); \
426 *(.text.hot .text .text.fixup .text.unlikely) \
427 *(.ref.text) \
428 MEM_KEEP(init.text) \
429 MEM_KEEP(exit.text) \
430
431
432 /* sched.text is aling to function alignment to secure we have same
433 * address even at second ld pass when generating System.map */
434 #define SCHED_TEXT \
435 ALIGN_FUNCTION(); \
436 VMLINUX_SYMBOL(__sched_text_start) = .; \
437 *(.sched.text) \
438 VMLINUX_SYMBOL(__sched_text_end) = .;
439
440 /* spinlock.text is aling to function alignment to secure we have same
441 * address even at second ld pass when generating System.map */
442 #define LOCK_TEXT \
443 ALIGN_FUNCTION(); \
444 VMLINUX_SYMBOL(__lock_text_start) = .; \
445 *(.spinlock.text) \
446 VMLINUX_SYMBOL(__lock_text_end) = .;
447
448 #define KPROBES_TEXT \
449 ALIGN_FUNCTION(); \
450 VMLINUX_SYMBOL(__kprobes_text_start) = .; \
451 *(.kprobes.text) \
452 VMLINUX_SYMBOL(__kprobes_text_end) = .;
453
454 #define ENTRY_TEXT \
455 ALIGN_FUNCTION(); \
456 VMLINUX_SYMBOL(__entry_text_start) = .; \
457 *(.entry.text) \
458 VMLINUX_SYMBOL(__entry_text_end) = .;
459
460 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
461 #define IRQENTRY_TEXT \
462 ALIGN_FUNCTION(); \
463 VMLINUX_SYMBOL(__irqentry_text_start) = .; \
464 *(.irqentry.text) \
465 VMLINUX_SYMBOL(__irqentry_text_end) = .;
466 #else
467 #define IRQENTRY_TEXT
468 #endif
469
470 /* Section used for early init (in .S files) */
471 #define HEAD_TEXT *(.head.text)
472
473 #define HEAD_TEXT_SECTION \
474 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \
475 HEAD_TEXT \
476 }
477
478 /*
479 * Exception table
480 */
481 #define EXCEPTION_TABLE(align) \
482 . = ALIGN(align); \
483 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \
484 VMLINUX_SYMBOL(__start___ex_table) = .; \
485 *(__ex_table) \
486 VMLINUX_SYMBOL(__stop___ex_table) = .; \
487 }
488
489 /*
490 * Init task
491 */
492 #define INIT_TASK_DATA_SECTION(align) \
493 . = ALIGN(align); \
494 .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \
495 INIT_TASK_DATA(align) \
496 }
497
498 #ifdef CONFIG_CONSTRUCTORS
499 #define KERNEL_CTORS() . = ALIGN(8); \
500 VMLINUX_SYMBOL(__ctors_start) = .; \
501 *(.ctors) \
502 *(SORT(.init_array.*)) \
503 *(.init_array) \
504 VMLINUX_SYMBOL(__ctors_end) = .;
505 #else
506 #define KERNEL_CTORS()
507 #endif
508
509 /* init and exit section handling */
510 #define INIT_DATA \
511 *(.init.data) \
512 MEM_DISCARD(init.data) \
513 KERNEL_CTORS() \
514 MCOUNT_REC() \
515 *(.init.rodata) \
516 FTRACE_EVENTS() \
517 TRACE_SYSCALLS() \
518 KPROBE_BLACKLIST() \
519 MEM_DISCARD(init.rodata) \
520 CLK_OF_TABLES() \
521 RESERVEDMEM_OF_TABLES() \
522 CLKSRC_OF_TABLES() \
523 IOMMU_OF_TABLES() \
524 CPU_METHOD_OF_TABLES() \
525 CPUIDLE_METHOD_OF_TABLES() \
526 KERNEL_DTB() \
527 IRQCHIP_OF_MATCH_TABLE() \
528 ACPI_PROBE_TABLE(irqchip) \
529 ACPI_PROBE_TABLE(clksrc) \
530 EARLYCON_TABLE() \
531 EARLYCON_OF_TABLES()
532
533 #define INIT_TEXT \
534 *(.init.text) \
535 MEM_DISCARD(init.text)
536
537 #define EXIT_DATA \
538 *(.exit.data) \
539 MEM_DISCARD(exit.data) \
540 MEM_DISCARD(exit.rodata)
541
542 #define EXIT_TEXT \
543 *(.exit.text) \
544 MEM_DISCARD(exit.text)
545
546 #define EXIT_CALL \
547 *(.exitcall.exit)
548
549 /*
550 * bss (Block Started by Symbol) - uninitialized data
551 * zeroed during startup
552 */
553 #define SBSS(sbss_align) \
554 . = ALIGN(sbss_align); \
555 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \
556 *(.sbss) \
557 *(.scommon) \
558 }
559
560 /*
561 * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra
562 * sections to the front of bss.
563 */
564 #ifndef BSS_FIRST_SECTIONS
565 #define BSS_FIRST_SECTIONS
566 #endif
567
568 #define BSS(bss_align) \
569 . = ALIGN(bss_align); \
570 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \
571 BSS_FIRST_SECTIONS \
572 *(.bss..page_aligned) \
573 *(.dynbss) \
574 *(.bss) \
575 *(COMMON) \
576 }
577
578 /*
579 * DWARF debug sections.
580 * Symbols in the DWARF debugging sections are relative to
581 * the beginning of the section so we begin them at 0.
582 */
583 #define DWARF_DEBUG \
584 /* DWARF 1 */ \
585 .debug 0 : { *(.debug) } \
586 .line 0 : { *(.line) } \
587 /* GNU DWARF 1 extensions */ \
588 .debug_srcinfo 0 : { *(.debug_srcinfo) } \
589 .debug_sfnames 0 : { *(.debug_sfnames) } \
590 /* DWARF 1.1 and DWARF 2 */ \
591 .debug_aranges 0 : { *(.debug_aranges) } \
592 .debug_pubnames 0 : { *(.debug_pubnames) } \
593 /* DWARF 2 */ \
594 .debug_info 0 : { *(.debug_info \
595 .gnu.linkonce.wi.*) } \
596 .debug_abbrev 0 : { *(.debug_abbrev) } \
597 .debug_line 0 : { *(.debug_line) } \
598 .debug_frame 0 : { *(.debug_frame) } \
599 .debug_str 0 : { *(.debug_str) } \
600 .debug_loc 0 : { *(.debug_loc) } \
601 .debug_macinfo 0 : { *(.debug_macinfo) } \
602 /* SGI/MIPS DWARF 2 extensions */ \
603 .debug_weaknames 0 : { *(.debug_weaknames) } \
604 .debug_funcnames 0 : { *(.debug_funcnames) } \
605 .debug_typenames 0 : { *(.debug_typenames) } \
606 .debug_varnames 0 : { *(.debug_varnames) } \
607
608 /* Stabs debugging sections. */
609 #define STABS_DEBUG \
610 .stab 0 : { *(.stab) } \
611 .stabstr 0 : { *(.stabstr) } \
612 .stab.excl 0 : { *(.stab.excl) } \
613 .stab.exclstr 0 : { *(.stab.exclstr) } \
614 .stab.index 0 : { *(.stab.index) } \
615 .stab.indexstr 0 : { *(.stab.indexstr) } \
616 .comment 0 : { *(.comment) }
617
618 #ifdef CONFIG_GENERIC_BUG
619 #define BUG_TABLE \
620 . = ALIGN(8); \
621 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \
622 VMLINUX_SYMBOL(__start___bug_table) = .; \
623 *(__bug_table) \
624 VMLINUX_SYMBOL(__stop___bug_table) = .; \
625 }
626 #else
627 #define BUG_TABLE
628 #endif
629
630 #ifdef CONFIG_PM_TRACE
631 #define TRACEDATA \
632 . = ALIGN(4); \
633 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \
634 VMLINUX_SYMBOL(__tracedata_start) = .; \
635 *(.tracedata) \
636 VMLINUX_SYMBOL(__tracedata_end) = .; \
637 }
638 #else
639 #define TRACEDATA
640 #endif
641
642 #define NOTES \
643 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \
644 VMLINUX_SYMBOL(__start_notes) = .; \
645 *(.note.*) \
646 VMLINUX_SYMBOL(__stop_notes) = .; \
647 }
648
649 #define INIT_SETUP(initsetup_align) \
650 . = ALIGN(initsetup_align); \
651 VMLINUX_SYMBOL(__setup_start) = .; \
652 *(.init.setup) \
653 VMLINUX_SYMBOL(__setup_end) = .;
654
655 #define INIT_CALLS_LEVEL(level) \
656 VMLINUX_SYMBOL(__initcall##level##_start) = .; \
657 *(.initcall##level##.init) \
658 *(.initcall##level##s.init) \
659
660 #define INIT_CALLS \
661 VMLINUX_SYMBOL(__initcall_start) = .; \
662 *(.initcallearly.init) \
663 INIT_CALLS_LEVEL(0) \
664 INIT_CALLS_LEVEL(1) \
665 INIT_CALLS_LEVEL(2) \
666 INIT_CALLS_LEVEL(3) \
667 INIT_CALLS_LEVEL(4) \
668 INIT_CALLS_LEVEL(5) \
669 INIT_CALLS_LEVEL(rootfs) \
670 INIT_CALLS_LEVEL(6) \
671 INIT_CALLS_LEVEL(7) \
672 VMLINUX_SYMBOL(__initcall_end) = .;
673
674 #define CON_INITCALL \
675 VMLINUX_SYMBOL(__con_initcall_start) = .; \
676 *(.con_initcall.init) \
677 VMLINUX_SYMBOL(__con_initcall_end) = .;
678
679 #define SECURITY_INITCALL \
680 VMLINUX_SYMBOL(__security_initcall_start) = .; \
681 *(.security_initcall.init) \
682 VMLINUX_SYMBOL(__security_initcall_end) = .;
683
684 #ifdef CONFIG_BLK_DEV_INITRD
685 #define INIT_RAM_FS \
686 . = ALIGN(4); \
687 VMLINUX_SYMBOL(__initramfs_start) = .; \
688 *(.init.ramfs) \
689 . = ALIGN(8); \
690 *(.init.ramfs.info)
691 #else
692 #define INIT_RAM_FS
693 #endif
694
695 /*
696 * Default discarded sections.
697 *
698 * Some archs want to discard exit text/data at runtime rather than
699 * link time due to cross-section references such as alt instructions,
700 * bug table, eh_frame, etc. DISCARDS must be the last of output
701 * section definitions so that such archs put those in earlier section
702 * definitions.
703 */
704 #define DISCARDS \
705 /DISCARD/ : { \
706 EXIT_TEXT \
707 EXIT_DATA \
708 EXIT_CALL \
709 *(.discard) \
710 *(.discard.*) \
711 }
712
713 /**
714 * PERCPU_INPUT - the percpu input sections
715 * @cacheline: cacheline size
716 *
717 * The core percpu section names and core symbols which do not rely
718 * directly upon load addresses.
719 *
720 * @cacheline is used to align subsections to avoid false cacheline
721 * sharing between subsections for different purposes.
722 */
723 #define PERCPU_INPUT(cacheline) \
724 VMLINUX_SYMBOL(__per_cpu_start) = .; \
725 *(.data..percpu..first) \
726 . = ALIGN(PAGE_SIZE); \
727 *(.data..percpu..page_aligned) \
728 . = ALIGN(cacheline); \
729 *(.data..percpu..read_mostly) \
730 . = ALIGN(cacheline); \
731 *(.data..percpu) \
732 *(.data..percpu..shared_aligned) \
733 VMLINUX_SYMBOL(__per_cpu_end) = .;
734
735 /**
736 * PERCPU_VADDR - define output section for percpu area
737 * @cacheline: cacheline size
738 * @vaddr: explicit base address (optional)
739 * @phdr: destination PHDR (optional)
740 *
741 * Macro which expands to output section for percpu area.
742 *
743 * @cacheline is used to align subsections to avoid false cacheline
744 * sharing between subsections for different purposes.
745 *
746 * If @vaddr is not blank, it specifies explicit base address and all
747 * percpu symbols will be offset from the given address. If blank,
748 * @vaddr always equals @laddr + LOAD_OFFSET.
749 *
750 * @phdr defines the output PHDR to use if not blank. Be warned that
751 * output PHDR is sticky. If @phdr is specified, the next output
752 * section in the linker script will go there too. @phdr should have
753 * a leading colon.
754 *
755 * Note that this macros defines __per_cpu_load as an absolute symbol.
756 * If there is no need to put the percpu section at a predetermined
757 * address, use PERCPU_SECTION.
758 */
759 #define PERCPU_VADDR(cacheline, vaddr, phdr) \
760 VMLINUX_SYMBOL(__per_cpu_load) = .; \
761 .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \
762 - LOAD_OFFSET) { \
763 PERCPU_INPUT(cacheline) \
764 } phdr \
765 . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu);
766
767 /**
768 * PERCPU_SECTION - define output section for percpu area, simple version
769 * @cacheline: cacheline size
770 *
771 * Align to PAGE_SIZE and outputs output section for percpu area. This
772 * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and
773 * __per_cpu_start will be identical.
774 *
775 * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,)
776 * except that __per_cpu_load is defined as a relative symbol against
777 * .data..percpu which is required for relocatable x86_32 configuration.
778 */
779 #define PERCPU_SECTION(cacheline) \
780 . = ALIGN(PAGE_SIZE); \
781 .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \
782 VMLINUX_SYMBOL(__per_cpu_load) = .; \
783 PERCPU_INPUT(cacheline) \
784 }
785
786
787 /*
788 * Definition of the high level *_SECTION macros
789 * They will fit only a subset of the architectures
790 */
791
792
793 /*
794 * Writeable data.
795 * All sections are combined in a single .data section.
796 * The sections following CONSTRUCTORS are arranged so their
797 * typical alignment matches.
798 * A cacheline is typical/always less than a PAGE_SIZE so
799 * the sections that has this restriction (or similar)
800 * is located before the ones requiring PAGE_SIZE alignment.
801 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
802 * matches the requirement of PAGE_ALIGNED_DATA.
803 *
804 * use 0 as page_align if page_aligned data is not used */
805 #define RW_DATA_SECTION(cacheline, pagealigned, inittask) \
806 . = ALIGN(PAGE_SIZE); \
807 .data : AT(ADDR(.data) - LOAD_OFFSET) { \
808 INIT_TASK_DATA(inittask) \
809 NOSAVE_DATA \
810 PAGE_ALIGNED_DATA(pagealigned) \
811 CACHELINE_ALIGNED_DATA(cacheline) \
812 READ_MOSTLY_DATA(cacheline) \
813 DATA_DATA \
814 CONSTRUCTORS \
815 }
816
817 #define INIT_TEXT_SECTION(inittext_align) \
818 . = ALIGN(inittext_align); \
819 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \
820 VMLINUX_SYMBOL(_sinittext) = .; \
821 INIT_TEXT \
822 VMLINUX_SYMBOL(_einittext) = .; \
823 }
824
825 #define INIT_DATA_SECTION(initsetup_align) \
826 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \
827 INIT_DATA \
828 INIT_SETUP(initsetup_align) \
829 INIT_CALLS \
830 CON_INITCALL \
831 SECURITY_INITCALL \
832 INIT_RAM_FS \
833 }
834
835 #define BSS_SECTION(sbss_align, bss_align, stop_align) \
836 . = ALIGN(sbss_align); \
837 VMLINUX_SYMBOL(__bss_start) = .; \
838 SBSS(sbss_align) \
839 BSS(bss_align) \
840 . = ALIGN(stop_align); \
841 VMLINUX_SYMBOL(__bss_stop) = .;
Linux kernel - Deliverables
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