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