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vmlinux.lds.h: restructure BSS linker script macros
[linux-block.git] / include / asm-generic / vmlinux.lds.h
CommitLineData
ef53dae8
SR		 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 = .;
7923f90f 15 * HEAD_TEXT_SECTION
ef53dae8
SR		 16 * INIT_TEXT_SECTION(PAGE_SIZE)
17 * INIT_DATA_SECTION(...)
18 * PERCPU(PAGE_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 *
04e448d9 33 * BSS_SECTION(0, 0, 0)
ef53dae8
SR		 34 * _end = .;
35 *
36 * /DISCARD/ : {
37 * EXIT_TEXT
38 * EXIT_DATA
7923f90f 39 * EXIT_CALL
ef53dae8
SR		 40 * }
41 * STABS_DEBUG
42 * DWARF_DEBUG
43 * }
44 *
45 * [__init_begin, __init_end] is the init section that may be freed after init
46 * [_stext, _etext] is the text section
47 * [_sdata, _edata] is the data section
48 *
49 * Some of the included output section have their own set of constants.
50 * Examples are: [__initramfs_start, __initramfs_end] for initramfs and
51 * [__nosave_begin, __nosave_end] for the nosave data
52 */
c80d471a 53
1da177e4
LT		 54#ifndef LOAD_OFFSET
55#define LOAD_OFFSET 0
56#endif
57
58#ifndef VMLINUX_SYMBOL
59#define VMLINUX_SYMBOL(_sym_) _sym_
60#endif
61
6d30e3a8
SR		 62/* Align . to a 8 byte boundary equals to maximum function alignment. */
63#define ALIGN_FUNCTION() . = ALIGN(8)
64
eb8f6890
SR		 65/* The actual configuration determine if the init/exit sections
66 * are handled as text/data or they can be discarded (which
67 * often happens at runtime)
68 */
69#ifdef CONFIG_HOTPLUG
70#define DEV_KEEP(sec) *(.dev##sec)
71#define DEV_DISCARD(sec)
72#else
73#define DEV_KEEP(sec)
74#define DEV_DISCARD(sec) *(.dev##sec)
75#endif
76
77#ifdef CONFIG_HOTPLUG_CPU
78#define CPU_KEEP(sec) *(.cpu##sec)
79#define CPU_DISCARD(sec)
80#else
81#define CPU_KEEP(sec)
82#define CPU_DISCARD(sec) *(.cpu##sec)
83#endif
84
1a3fb6d4 85#if defined(CONFIG_MEMORY_HOTPLUG)
eb8f6890
SR		 86#define MEM_KEEP(sec) *(.mem##sec)
87#define MEM_DISCARD(sec)
88#else
89#define MEM_KEEP(sec)
90#define MEM_DISCARD(sec) *(.mem##sec)
91#endif
92
8da3821b
SR		 93#ifdef CONFIG_FTRACE_MCOUNT_RECORD
94#define MCOUNT_REC() VMLINUX_SYMBOL(__start_mcount_loc) = .; \
95 *(__mcount_loc) \
96 VMLINUX_SYMBOL(__stop_mcount_loc) = .;
97#else
98#define MCOUNT_REC()
99#endif
eb8f6890 100
2ed84eeb 101#ifdef CONFIG_TRACE_BRANCH_PROFILING
45b79749
SR		 102#define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \
103 *(_ftrace_annotated_branch) \
104 VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .;
1f0d69a9
SR		 105#else
106#define LIKELY_PROFILE()
107#endif
108
2bcd521a
SR		 109#ifdef CONFIG_PROFILE_ALL_BRANCHES
110#define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \
111 *(_ftrace_branch) \
112 VMLINUX_SYMBOL(__stop_branch_profile) = .;
113#else
114#define BRANCH_PROFILE()
115#endif
116
5f77a88b 117#ifdef CONFIG_EVENT_TRACING
b77e38aa
SR		 118#define FTRACE_EVENTS() VMLINUX_SYMBOL(__start_ftrace_events) = .; \
119 *(_ftrace_events) \
120 VMLINUX_SYMBOL(__stop_ftrace_events) = .;
121#else
122#define FTRACE_EVENTS()
123#endif
124
1ba28e02
LJ		 125#ifdef CONFIG_TRACING
126#define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \
127 *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \
128 VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .;
129#else
130#define TRACE_PRINTKS()
131#endif
132
bed1ffca
FW		 133#ifdef CONFIG_FTRACE_SYSCALLS
134#define TRACE_SYSCALLS() VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \
135 *(__syscalls_metadata) \
136 VMLINUX_SYMBOL(__stop_syscalls_metadata) = .;
137#else
138#define TRACE_SYSCALLS()
139#endif
140
ca967258
SR		 141/* .data section */
142#define DATA_DATA \
0e0d314e 143 *(.data) \
312b1485 144 *(.ref.data) \
eb8f6890
SR		 145 DEV_KEEP(init.data) \
146 DEV_KEEP(exit.data) \
147 CPU_KEEP(init.data) \
148 CPU_KEEP(exit.data) \
149 MEM_KEEP(init.data) \
150 MEM_KEEP(exit.data) \
8256e47c
MD		 151 . = ALIGN(8); \
152 VMLINUX_SYMBOL(__start___markers) = .; \
153 *(__markers) \
97e1c18e 154 VMLINUX_SYMBOL(__stop___markers) = .; \
7e066fb8 155 . = ALIGN(32); \
97e1c18e
MD		 156 VMLINUX_SYMBOL(__start___tracepoints) = .; \
157 *(__tracepoints) \
1f0d69a9 158 VMLINUX_SYMBOL(__stop___tracepoints) = .; \
e9d376f0
JB		 159 /* implement dynamic printk debug */ \
160 . = ALIGN(8); \
161 VMLINUX_SYMBOL(__start___verbose) = .; \
162 *(__verbose) \
163 VMLINUX_SYMBOL(__stop___verbose) = .; \
2bcd521a 164 LIKELY_PROFILE() \
b77e38aa 165 BRANCH_PROFILE() \
8a20d84d 166 TRACE_PRINTKS() \
bed1ffca
FW		 167 FTRACE_EVENTS() \
168 TRACE_SYSCALLS()
ca967258 169
ef53dae8
SR		 170/*
171 * Data section helpers
172 */
173#define NOSAVE_DATA \
174 . = ALIGN(PAGE_SIZE); \
175 VMLINUX_SYMBOL(__nosave_begin) = .; \
176 *(.data.nosave) \
177 . = ALIGN(PAGE_SIZE); \
178 VMLINUX_SYMBOL(__nosave_end) = .;
179
180#define PAGE_ALIGNED_DATA(page_align) \
181 . = ALIGN(page_align); \
182 *(.data.page_aligned)
183
184#define READ_MOSTLY_DATA(align) \
185 . = ALIGN(align); \
186 *(.data.read_mostly)
187
188#define CACHELINE_ALIGNED_DATA(align) \
189 . = ALIGN(align); \
190 *(.data.cacheline_aligned)
191
39a449d9 192#define INIT_TASK_DATA(align) \
ef53dae8
SR		 193 . = ALIGN(align); \
194 *(.data.init_task)
195
196/*
197 * Read only Data
198 */
199#define RO_DATA_SECTION(align) \
4096b46f 200 . = ALIGN((align)); \
1da177e4 201 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \
6569580d 202 VMLINUX_SYMBOL(__start_rodata) = .; \
1da177e4
LT		 203 *(.rodata) *(.rodata.*) \
204 *(__vermagic) /* Kernel version magic */ \
8256e47c 205 *(__markers_strings) /* Markers: strings */ \
97e1c18e 206 *(__tracepoints_strings)/* Tracepoints: strings */ \
1da177e4
LT		 207 } \
208 \
209 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \
210 *(.rodata1) \
211 } \
212 \
6360b1fb
JB		 213 BUG_TABLE \
214 \
1da177e4
LT		 215 /* PCI quirks */ \
216 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \
217 VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \
218 *(.pci_fixup_early) \
219 VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \
220 VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \
221 *(.pci_fixup_header) \
222 VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \
223 VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \
224 *(.pci_fixup_final) \
225 VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \
226 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \
227 *(.pci_fixup_enable) \
228 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \
1597cacb
AC		 229 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \
230 *(.pci_fixup_resume) \
231 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \
e1a2a51e
RW		 232 VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \
233 *(.pci_fixup_resume_early) \
234 VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \
235 VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \
236 *(.pci_fixup_suspend) \
237 VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \
1da177e4
LT		 238 } \
239 \
5658c769
DW		 240 /* Built-in firmware blobs */ \
241 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \
242 VMLINUX_SYMBOL(__start_builtin_fw) = .; \
243 *(.builtin_fw) \
244 VMLINUX_SYMBOL(__end_builtin_fw) = .; \
245 } \
246 \
394b701c
MP		 247 /* RapidIO route ops */ \
248 .rio_route : AT(ADDR(.rio_route) - LOAD_OFFSET) { \
249 VMLINUX_SYMBOL(__start_rio_route_ops) = .; \
250 *(.rio_route_ops) \
251 VMLINUX_SYMBOL(__end_rio_route_ops) = .; \
252 } \
253 \
63687a52
JB		 254 TRACEDATA \
255 \
1da177e4
LT		 256 /* Kernel symbol table: Normal symbols */ \
257 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \
258 VMLINUX_SYMBOL(__start___ksymtab) = .; \
259 *(__ksymtab) \
260 VMLINUX_SYMBOL(__stop___ksymtab) = .; \
261 } \
262 \
263 /* Kernel symbol table: GPL-only symbols */ \
264 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \
265 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \
266 *(__ksymtab_gpl) \
267 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \
268 } \
269 \
f71d20e9
AV		 270 /* Kernel symbol table: Normal unused symbols */ \
271 __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \
272 VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \
273 *(__ksymtab_unused) \
274 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \
275 } \
276 \
277 /* Kernel symbol table: GPL-only unused symbols */ \
278 __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
279 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \
280 *(__ksymtab_unused_gpl) \
281 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \
282 } \
283 \
9f28bb7e
GKH		 284 /* Kernel symbol table: GPL-future-only symbols */ \
285 __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
286 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \
287 *(__ksymtab_gpl_future) \
288 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \
289 } \
290 \
1da177e4
LT		 291 /* Kernel symbol table: Normal symbols */ \
292 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \
293 VMLINUX_SYMBOL(__start___kcrctab) = .; \
294 *(__kcrctab) \
295 VMLINUX_SYMBOL(__stop___kcrctab) = .; \
296 } \
297 \
298 /* Kernel symbol table: GPL-only symbols */ \
299 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \
300 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \
301 *(__kcrctab_gpl) \
302 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \
303 } \
304 \
f71d20e9
AV		 305 /* Kernel symbol table: Normal unused symbols */ \
306 __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \
307 VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \
308 *(__kcrctab_unused) \
309 VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \
310 } \
311 \
312 /* Kernel symbol table: GPL-only unused symbols */ \
313 __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
314 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \
315 *(__kcrctab_unused_gpl) \
316 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \
317 } \
318 \
9f28bb7e
GKH		 319 /* Kernel symbol table: GPL-future-only symbols */ \
320 __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
321 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \
322 *(__kcrctab_gpl_future) \
323 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \
324 } \
325 \
1da177e4
LT		 326 /* Kernel symbol table: strings */ \
327 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
328 *(__ksymtab_strings) \
329 } \
330 \
eb8f6890
SR		 331 /* __*init sections */ \
332 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \
312b1485 333 *(.ref.rodata) \
8da3821b 334 MCOUNT_REC() \
eb8f6890
SR		 335 DEV_KEEP(init.rodata) \
336 DEV_KEEP(exit.rodata) \
337 CPU_KEEP(init.rodata) \
338 CPU_KEEP(exit.rodata) \
339 MEM_KEEP(init.rodata) \
340 MEM_KEEP(exit.rodata) \
341 } \
342 \
1da177e4
LT		 343 /* Built-in module parameters. */ \
344 __param : AT(ADDR(__param) - LOAD_OFFSET) { \
345 VMLINUX_SYMBOL(__start___param) = .; \
346 *(__param) \
347 VMLINUX_SYMBOL(__stop___param) = .; \
edeed305 348 . = ALIGN((align)); \
6569580d 349 VMLINUX_SYMBOL(__end_rodata) = .; \
7583ddfd 350 } \
4096b46f
SR		 351 . = ALIGN((align));
352
ef53dae8 353/* RODATA & RO_DATA provided for backward compatibility.
4096b46f 354 * All archs are supposed to use RO_DATA() */
ef53dae8
SR		 355#define RODATA RO_DATA_SECTION(4096)
356#define RO_DATA(align) RO_DATA_SECTION(align)
1da177e4
LT		 357
358#define SECURITY_INIT \
60bad7fa 359 .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
1da177e4
LT		 360 VMLINUX_SYMBOL(__security_initcall_start) = .; \
361 *(.security_initcall.init) \
362 VMLINUX_SYMBOL(__security_initcall_end) = .; \
363 }
364
7664709b
SR		 365/* .text section. Map to function alignment to avoid address changes
366 * during second ld run in second ld pass when generating System.map */
367#define TEXT_TEXT \
368 ALIGN_FUNCTION(); \
fb5e2b37 369 *(.text.hot) \
0e0d314e 370 *(.text) \
312b1485 371 *(.ref.text) \
eb8f6890
SR		 372 DEV_KEEP(init.text) \
373 DEV_KEEP(exit.text) \
374 CPU_KEEP(init.text) \
375 CPU_KEEP(exit.text) \
376 MEM_KEEP(init.text) \
fb5e2b37
JB		 377 MEM_KEEP(exit.text) \
378 *(.text.unlikely)
eb8f6890 379
7664709b 380
6d30e3a8
SR		 381/* sched.text is aling to function alignment to secure we have same
382 * address even at second ld pass when generating System.map */
1da177e4 383#define SCHED_TEXT \
6d30e3a8 384 ALIGN_FUNCTION(); \
1da177e4
LT		 385 VMLINUX_SYMBOL(__sched_text_start) = .; \
386 *(.sched.text) \
387 VMLINUX_SYMBOL(__sched_text_end) = .;
388
6d30e3a8
SR		 389/* spinlock.text is aling to function alignment to secure we have same
390 * address even at second ld pass when generating System.map */
1da177e4 391#define LOCK_TEXT \
6d30e3a8 392 ALIGN_FUNCTION(); \
1da177e4
LT		 393 VMLINUX_SYMBOL(__lock_text_start) = .; \
394 *(.spinlock.text) \
395 VMLINUX_SYMBOL(__lock_text_end) = .;
d0aaff97
PP		 396
397#define KPROBES_TEXT \
398 ALIGN_FUNCTION(); \
399 VMLINUX_SYMBOL(__kprobes_text_start) = .; \
400 *(.kprobes.text) \
401 VMLINUX_SYMBOL(__kprobes_text_end) = .;
a7d0c210 402
a0343e82
FW		 403#ifdef CONFIG_FUNCTION_GRAPH_TRACER
404#define IRQENTRY_TEXT \
405 ALIGN_FUNCTION(); \
406 VMLINUX_SYMBOL(__irqentry_text_start) = .; \
407 *(.irqentry.text) \
408 VMLINUX_SYMBOL(__irqentry_text_end) = .;
409#else
410#define IRQENTRY_TEXT
411#endif
412
37c514e3 413/* Section used for early init (in .S files) */
7923f90f 414#define HEAD_TEXT *(.head.text)
37c514e3 415
7923f90f 416#define HEAD_TEXT_SECTION \
ef53dae8
SR		 417 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \
418 HEAD_TEXT \
419 }
420
421/*
422 * Exception table
423 */
424#define EXCEPTION_TABLE(align) \
425 . = ALIGN(align); \
426 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \
427 VMLINUX_SYMBOL(__start___ex_table) = .; \
428 *(__ex_table) \
429 VMLINUX_SYMBOL(__stop___ex_table) = .; \
430 }
431
432/*
433 * Init task
434 */
39a449d9 435#define INIT_TASK_DATA_SECTION(align) \
ef53dae8
SR		 436 . = ALIGN(align); \
437 .data.init_task : { \
39a449d9 438 INIT_TASK_DATA(align) \
ef53dae8 439 }
37c514e3 440
b99b87f7 441#ifdef CONFIG_CONSTRUCTORS
2a2325e6
HC		 442#define KERNEL_CTORS() . = ALIGN(8); \
443 VMLINUX_SYMBOL(__ctors_start) = .; \
b99b87f7
PO		 444 *(.ctors) \
445 VMLINUX_SYMBOL(__ctors_end) = .;
446#else
447#define KERNEL_CTORS()
448#endif
449
01ba2bdc 450/* init and exit section handling */
eb8f6890
SR		 451#define INIT_DATA \
452 *(.init.data) \
453 DEV_DISCARD(init.data) \
eb8f6890 454 CPU_DISCARD(init.data) \
eb8f6890 455 MEM_DISCARD(init.data) \
b99b87f7 456 KERNEL_CTORS() \
fd6c3a8d
JB		 457 *(.init.rodata) \
458 DEV_DISCARD(init.rodata) \
459 CPU_DISCARD(init.rodata) \
e9d376f0 460 MEM_DISCARD(init.rodata)
eb8f6890
SR		 461
462#define INIT_TEXT \
463 *(.init.text) \
464 DEV_DISCARD(init.text) \
465 CPU_DISCARD(init.text) \
466 MEM_DISCARD(init.text)
467
468#define EXIT_DATA \
469 *(.exit.data) \
470 DEV_DISCARD(exit.data) \
471 DEV_DISCARD(exit.rodata) \
472 CPU_DISCARD(exit.data) \
473 CPU_DISCARD(exit.rodata) \
474 MEM_DISCARD(exit.data) \
475 MEM_DISCARD(exit.rodata)
01ba2bdc 476
eb8f6890
SR		 477#define EXIT_TEXT \
478 *(.exit.text) \
479 DEV_DISCARD(exit.text) \
480 CPU_DISCARD(exit.text) \
481 MEM_DISCARD(exit.text)
01ba2bdc 482
7923f90f
SR		 483#define EXIT_CALL \
484 *(.exitcall.exit)
485
ef53dae8
SR		 486/*
487 * bss (Block Started by Symbol) - uninitialized data
488 * zeroed during startup
489 */
04e448d9
TA		 490#define SBSS(sbss_align) \
491 . = ALIGN(sbss_align); \
ef53dae8
SR		 492 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \
493 *(.sbss) \
494 *(.scommon) \
495 }
496
497#define BSS(bss_align) \
498 . = ALIGN(bss_align); \
499 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \
ef53dae8
SR		 500 *(.bss.page_aligned) \
501 *(.dynbss) \
502 *(.bss) \
503 *(COMMON) \
ef53dae8
SR		 504 }
505
506/*
507 * DWARF debug sections.
508 * Symbols in the DWARF debugging sections are relative to
509 * the beginning of the section so we begin them at 0.
510 */
a7d0c210
PBG		 511#define DWARF_DEBUG \
512 /* DWARF 1 */ \
513 .debug 0 : { *(.debug) } \
514 .line 0 : { *(.line) } \
515 /* GNU DWARF 1 extensions */ \
516 .debug_srcinfo 0 : { *(.debug_srcinfo) } \
517 .debug_sfnames 0 : { *(.debug_sfnames) } \
518 /* DWARF 1.1 and DWARF 2 */ \
519 .debug_aranges 0 : { *(.debug_aranges) } \
520 .debug_pubnames 0 : { *(.debug_pubnames) } \
521 /* DWARF 2 */ \
522 .debug_info 0 : { *(.debug_info \
523 .gnu.linkonce.wi.*) } \
524 .debug_abbrev 0 : { *(.debug_abbrev) } \
525 .debug_line 0 : { *(.debug_line) } \
526 .debug_frame 0 : { *(.debug_frame) } \
527 .debug_str 0 : { *(.debug_str) } \
528 .debug_loc 0 : { *(.debug_loc) } \
529 .debug_macinfo 0 : { *(.debug_macinfo) } \
530 /* SGI/MIPS DWARF 2 extensions */ \
531 .debug_weaknames 0 : { *(.debug_weaknames) } \
532 .debug_funcnames 0 : { *(.debug_funcnames) } \
533 .debug_typenames 0 : { *(.debug_typenames) } \
534 .debug_varnames 0 : { *(.debug_varnames) } \
535
536 /* Stabs debugging sections. */
537#define STABS_DEBUG \
538 .stab 0 : { *(.stab) } \
539 .stabstr 0 : { *(.stabstr) } \
540 .stab.excl 0 : { *(.stab.excl) } \
541 .stab.exclstr 0 : { *(.stab.exclstr) } \
542 .stab.index 0 : { *(.stab.index) } \
543 .stab.indexstr 0 : { *(.stab.indexstr) } \
544 .comment 0 : { *(.comment) }
9c9b8b38 545
6360b1fb 546#ifdef CONFIG_GENERIC_BUG
7664c5a1
JF		 547#define BUG_TABLE \
548 . = ALIGN(8); \
549 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \
c6de0026 550 VMLINUX_SYMBOL(__start___bug_table) = .; \
7664c5a1 551 *(__bug_table) \
c6de0026 552 VMLINUX_SYMBOL(__stop___bug_table) = .; \
7664c5a1 553 }
6360b1fb
JB		 554#else
555#define BUG_TABLE
556#endif
7664c5a1 557
63687a52
JB		 558#ifdef CONFIG_PM_TRACE
559#define TRACEDATA \
560 . = ALIGN(4); \
561 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \
c6de0026 562 VMLINUX_SYMBOL(__tracedata_start) = .; \
63687a52 563 *(.tracedata) \
c6de0026 564 VMLINUX_SYMBOL(__tracedata_end) = .; \
63687a52
JB		 565 }
566#else
567#define TRACEDATA
568#endif
569
9c9b8b38 570#define NOTES \
cbe87121
RM		 571 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \
572 VMLINUX_SYMBOL(__start_notes) = .; \
573 *(.note.*) \
574 VMLINUX_SYMBOL(__stop_notes) = .; \
575 }
61ce1efe 576
ef53dae8
SR		 577#define INIT_SETUP(initsetup_align) \
578 . = ALIGN(initsetup_align); \
579 VMLINUX_SYMBOL(__setup_start) = .; \
580 *(.init.setup) \
581 VMLINUX_SYMBOL(__setup_end) = .;
582
61ce1efe 583#define INITCALLS \
c2147a50 584 *(.initcallearly.init) \
c6de0026 585 VMLINUX_SYMBOL(__early_initcall_end) = .; \
b3438f82
LT		 586 *(.initcall0.init) \
587 *(.initcall0s.init) \
61ce1efe 588 *(.initcall1.init) \
735a7ffb 589 *(.initcall1s.init) \
61ce1efe 590 *(.initcall2.init) \
735a7ffb 591 *(.initcall2s.init) \
61ce1efe 592 *(.initcall3.init) \
735a7ffb 593 *(.initcall3s.init) \
61ce1efe 594 *(.initcall4.init) \
735a7ffb 595 *(.initcall4s.init) \
61ce1efe 596 *(.initcall5.init) \
735a7ffb 597 *(.initcall5s.init) \
8d610dd5 598 *(.initcallrootfs.init) \
61ce1efe 599 *(.initcall6.init) \
735a7ffb
AM		 600 *(.initcall6s.init) \
601 *(.initcall7.init) \
602 *(.initcall7s.init)
61ce1efe 603
ef53dae8
SR		 604#define INIT_CALLS \
605 VMLINUX_SYMBOL(__initcall_start) = .; \
606 INITCALLS \
607 VMLINUX_SYMBOL(__initcall_end) = .;
608
609#define CON_INITCALL \
610 VMLINUX_SYMBOL(__con_initcall_start) = .; \
611 *(.con_initcall.init) \
612 VMLINUX_SYMBOL(__con_initcall_end) = .;
613
614#define SECURITY_INITCALL \
615 VMLINUX_SYMBOL(__security_initcall_start) = .; \
616 *(.security_initcall.init) \
617 VMLINUX_SYMBOL(__security_initcall_end) = .;
618
619#ifdef CONFIG_BLK_DEV_INITRD
620#define INIT_RAM_FS \
621 . = ALIGN(PAGE_SIZE); \
622 VMLINUX_SYMBOL(__initramfs_start) = .; \
623 *(.init.ramfs) \
624 VMLINUX_SYMBOL(__initramfs_end) = .;
625#else
eadfe219 626#define INIT_RAM_FS
ef53dae8
SR		 627#endif
628
3e5d8f97 629/**
6b7c38d5 630 * PERCPU_VADDR - define output section for percpu area
3e5d8f97
TH		 631 * @vaddr: explicit base address (optional)
632 * @phdr: destination PHDR (optional)
633 *
634 * Macro which expands to output section for percpu area. If @vaddr
635 * is not blank, it specifies explicit base address and all percpu
636 * symbols will be offset from the given address. If blank, @vaddr
637 * always equals @laddr + LOAD_OFFSET.
638 *
639 * @phdr defines the output PHDR to use if not blank. Be warned that
640 * output PHDR is sticky. If @phdr is specified, the next output
641 * section in the linker script will go there too. @phdr should have
642 * a leading colon.
643 *
3ac6cffe
TH		 644 * Note that this macros defines __per_cpu_load as an absolute symbol.
645 * If there is no need to put the percpu section at a predetermined
646 * address, use PERCPU().
3e5d8f97
TH		 647 */
648#define PERCPU_VADDR(vaddr, phdr) \
dba3d36b
IM		 649 VMLINUX_SYMBOL(__per_cpu_load) = .; \
650 .data.percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \
6b7c38d5
TH		 651 - LOAD_OFFSET) { \
652 VMLINUX_SYMBOL(__per_cpu_start) = .; \
0bd74fa8 653 *(.data.percpu.first) \
63cc8c75 654 *(.data.percpu.page_aligned) \
5fb7dc37
FY		 655 *(.data.percpu) \
656 *(.data.percpu.shared_aligned) \
6b7c38d5
TH		 657 VMLINUX_SYMBOL(__per_cpu_end) = .; \
658 } phdr \
dba3d36b 659 . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data.percpu);
3e5d8f97
TH		 660
661/**
662 * PERCPU - define output section for percpu area, simple version
663 * @align: required alignment
664 *
665 * Align to @align and outputs output section for percpu area. This
666 * macro doesn't maniuplate @vaddr or @phdr and __per_cpu_load and
667 * __per_cpu_start will be identical.
3ac6cffe
TH		 668 *
669 * This macro is equivalent to ALIGN(align); PERCPU_VADDR( , ) except
670 * that __per_cpu_load is defined as a relative symbol against
671 * .data.percpu which is required for relocatable x86_32
672 * configuration.
3e5d8f97 673 */
5fb7dc37
FY		 674#define PERCPU(align) \
675 . = ALIGN(align); \
3ac6cffe
TH		 676 .data.percpu : AT(ADDR(.data.percpu) - LOAD_OFFSET) { \
677 VMLINUX_SYMBOL(__per_cpu_load) = .; \
678 VMLINUX_SYMBOL(__per_cpu_start) = .; \
679 *(.data.percpu.first) \
63cc8c75 680 *(.data.percpu.page_aligned) \
5fb7dc37
FY		 681 *(.data.percpu) \
682 *(.data.percpu.shared_aligned) \
3ac6cffe
TH		 683 VMLINUX_SYMBOL(__per_cpu_end) = .; \
684 }
ef53dae8
SR		 685
686
687/*
688 * Definition of the high level *_SECTION macros
689 * They will fit only a subset of the architectures
690 */
691
692
693/*
694 * Writeable data.
695 * All sections are combined in a single .data section.
696 * The sections following CONSTRUCTORS are arranged so their
697 * typical alignment matches.
698 * A cacheline is typical/always less than a PAGE_SIZE so
699 * the sections that has this restriction (or similar)
700 * is located before the ones requiring PAGE_SIZE alignment.
701 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
702 * matches the requirment of PAGE_ALIGNED_DATA.
703 *
7923f90f 704 * use 0 as page_align if page_aligned data is not used */
73f1d939 705#define RW_DATA_SECTION(cacheline, pagealigned, inittask) \
ef53dae8
SR		 706 . = ALIGN(PAGE_SIZE); \
707 .data : AT(ADDR(.data) - LOAD_OFFSET) { \
39a449d9 708 INIT_TASK_DATA(inittask) \
ef53dae8
SR		 709 CACHELINE_ALIGNED_DATA(cacheline) \
710 READ_MOSTLY_DATA(cacheline) \
711 DATA_DATA \
712 CONSTRUCTORS \
73f1d939 713 NOSAVE_DATA \
ef53dae8
SR		 714 PAGE_ALIGNED_DATA(pagealigned) \
715 }
716
717#define INIT_TEXT_SECTION(inittext_align) \
718 . = ALIGN(inittext_align); \
719 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \
720 VMLINUX_SYMBOL(_sinittext) = .; \
721 INIT_TEXT \
722 VMLINUX_SYMBOL(_einittext) = .; \
723 }
724
725#define INIT_DATA_SECTION(initsetup_align) \
726 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \
727 INIT_DATA \
728 INIT_SETUP(initsetup_align) \
729 INIT_CALLS \
730 CON_INITCALL \
731 SECURITY_INITCALL \
732 INIT_RAM_FS \
733 }
734
04e448d9
TA		 735#define BSS_SECTION(sbss_align, bss_align, stop_align) \
736 . = ALIGN(sbss_align); \
737 VMLINUX_SYMBOL(__bss_start) = .; \
738 SBSS(sbss_align) \
ef53dae8 739 BSS(bss_align) \
04e448d9
TA		 740 . = ALIGN(stop_align); \
741 VMLINUX_SYMBOL(__bss_stop) = .;
Linux 6.x block layer and io_uring tree(s)