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jump label: Introduce static_branch() interface
[deliverable/linux.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(...)
19df0c2f 18 * PERCPU(CACHELINE_SIZE, PAGE_SIZE)
ef53dae8
SR		 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 *
ef53dae8
SR		 36 * STABS_DEBUG
37 * DWARF_DEBUG
023bf6f1
TH		 38 *
39 * DISCARDS // must be the last
ef53dae8
SR		 40 * }
41 *
42 * [__init_begin, __init_end] is the init section that may be freed after init
43 * [_stext, _etext] is the text section
44 * [_sdata, _edata] is the data section
45 *
46 * Some of the included output section have their own set of constants.
47 * Examples are: [__initramfs_start, __initramfs_end] for initramfs and
48 * [__nosave_begin, __nosave_end] for the nosave data
49 */
c80d471a 50
1da177e4
LT		 51#ifndef LOAD_OFFSET
52#define LOAD_OFFSET 0
53#endif
54
9e1b9b80
AJ		 55#ifndef SYMBOL_PREFIX
56#define VMLINUX_SYMBOL(sym) sym
57#else
58#define PASTE2(x,y) x##y
59#define PASTE(x,y) PASTE2(x,y)
60#define VMLINUX_SYMBOL(sym) PASTE(SYMBOL_PREFIX, sym)
1da177e4
LT		 61#endif
62
6d30e3a8
SR		 63/* Align . to a 8 byte boundary equals to maximum function alignment. */
64#define ALIGN_FUNCTION() . = ALIGN(8)
65
07fca0e5
SR		 66/*
67 * Align to a 32 byte boundary equal to the
68 * alignment gcc 4.5 uses for a struct
69 */
aab94339
DB		 70#define STRUCT_ALIGNMENT 32
71#define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT)
07fca0e5 72
eb8f6890
SR		 73/* The actual configuration determine if the init/exit sections
74 * are handled as text/data or they can be discarded (which
75 * often happens at runtime)
76 */
77#ifdef CONFIG_HOTPLUG
78#define DEV_KEEP(sec) *(.dev##sec)
79#define DEV_DISCARD(sec)
80#else
81#define DEV_KEEP(sec)
82#define DEV_DISCARD(sec) *(.dev##sec)
83#endif
84
85#ifdef CONFIG_HOTPLUG_CPU
86#define CPU_KEEP(sec) *(.cpu##sec)
87#define CPU_DISCARD(sec)
88#else
89#define CPU_KEEP(sec)
90#define CPU_DISCARD(sec) *(.cpu##sec)
91#endif
92
1a3fb6d4 93#if defined(CONFIG_MEMORY_HOTPLUG)
eb8f6890
SR		 94#define MEM_KEEP(sec) *(.mem##sec)
95#define MEM_DISCARD(sec)
96#else
97#define MEM_KEEP(sec)
98#define MEM_DISCARD(sec) *(.mem##sec)
99#endif
100
8da3821b 101#ifdef CONFIG_FTRACE_MCOUNT_RECORD
4b3b4c5e
JR		 102#define MCOUNT_REC() . = ALIGN(8); \
103 VMLINUX_SYMBOL(__start_mcount_loc) = .; \
8da3821b
SR		 104 *(__mcount_loc) \
105 VMLINUX_SYMBOL(__stop_mcount_loc) = .;
106#else
107#define MCOUNT_REC()
108#endif
eb8f6890 109
2ed84eeb 110#ifdef CONFIG_TRACE_BRANCH_PROFILING
45b79749
SR		 111#define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \
112 *(_ftrace_annotated_branch) \
113 VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .;
1f0d69a9
SR		 114#else
115#define LIKELY_PROFILE()
116#endif
117
2bcd521a
SR		 118#ifdef CONFIG_PROFILE_ALL_BRANCHES
119#define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \
120 *(_ftrace_branch) \
121 VMLINUX_SYMBOL(__stop_branch_profile) = .;
122#else
123#define BRANCH_PROFILE()
124#endif
125
5f77a88b 126#ifdef CONFIG_EVENT_TRACING
e4a9ea5e
SR		 127#define FTRACE_EVENTS() . = ALIGN(8); \
128 VMLINUX_SYMBOL(__start_ftrace_events) = .; \
b77e38aa
SR		 129 *(_ftrace_events) \
130 VMLINUX_SYMBOL(__stop_ftrace_events) = .;
131#else
132#define FTRACE_EVENTS()
133#endif
134
1ba28e02
LJ		 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#else
140#define TRACE_PRINTKS()
141#endif
142
bed1ffca 143#ifdef CONFIG_FTRACE_SYSCALLS
3d56e331
SR		 144#define TRACE_SYSCALLS() . = ALIGN(8); \
145 VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \
bed1ffca
FW		 146 *(__syscalls_metadata) \
147 VMLINUX_SYMBOL(__stop_syscalls_metadata) = .;
148#else
149#define TRACE_SYSCALLS()
150#endif
151
aab94339
DB		 152
153#define KERNEL_DTB() \
154 STRUCT_ALIGN(); \
155 VMLINUX_SYMBOL(__dtb_start) = .; \
156 *(.dtb.init.rodata) \
157 VMLINUX_SYMBOL(__dtb_end) = .;
158
ca967258
SR		 159/* .data section */
160#define DATA_DATA \
0e0d314e 161 *(.data) \
312b1485 162 *(.ref.data) \
d356c0b6 163 *(.data..shared_aligned) /* percpu related */ \
eb8f6890
SR		 164 DEV_KEEP(init.data) \
165 DEV_KEEP(exit.data) \
166 CPU_KEEP(init.data) \
167 CPU_KEEP(exit.data) \
168 MEM_KEEP(init.data) \
169 MEM_KEEP(exit.data) \
65498646 170 STRUCT_ALIGN(); \
97e1c18e 171 *(__tracepoints) \
e9d376f0 172 /* implement dynamic printk debug */ \
d430d3d7
JB		 173 . = ALIGN(8); \
174 VMLINUX_SYMBOL(__start___jump_table) = .; \
175 *(__jump_table) \
176 VMLINUX_SYMBOL(__stop___jump_table) = .; \
e9d376f0
JB		 177 . = ALIGN(8); \
178 VMLINUX_SYMBOL(__start___verbose) = .; \
179 *(__verbose) \
180 VMLINUX_SYMBOL(__stop___verbose) = .; \
2bcd521a 181 LIKELY_PROFILE() \
b77e38aa 182 BRANCH_PROFILE() \
3d56e331 183 TRACE_PRINTKS()
ca967258 184
ef53dae8
SR		 185/*
186 * Data section helpers
187 */
188#define NOSAVE_DATA \
189 . = ALIGN(PAGE_SIZE); \
190 VMLINUX_SYMBOL(__nosave_begin) = .; \
07b3bb1e 191 *(.data..nosave) \
ef53dae8
SR		 192 . = ALIGN(PAGE_SIZE); \
193 VMLINUX_SYMBOL(__nosave_end) = .;
194
195#define PAGE_ALIGNED_DATA(page_align) \
196 . = ALIGN(page_align); \
75b13483 197 *(.data..page_aligned)
ef53dae8
SR		 198
199#define READ_MOSTLY_DATA(align) \
200 . = ALIGN(align); \
8369744f
SL		 201 *(.data..read_mostly) \
202 . = ALIGN(align);
ef53dae8
SR		 203
204#define CACHELINE_ALIGNED_DATA(align) \
205 . = ALIGN(align); \
4af57b78 206 *(.data..cacheline_aligned)
ef53dae8 207
39a449d9 208#define INIT_TASK_DATA(align) \
ef53dae8 209 . = ALIGN(align); \
2af7687f 210 *(.data..init_task)
ef53dae8
SR		 211
212/*
213 * Read only Data
214 */
215#define RO_DATA_SECTION(align) \
4096b46f 216 . = ALIGN((align)); \
1da177e4 217 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \
6569580d 218 VMLINUX_SYMBOL(__start_rodata) = .; \
1da177e4
LT		 219 *(.rodata) *(.rodata.*) \
220 *(__vermagic) /* Kernel version magic */ \
65498646
MD		 221 . = ALIGN(8); \
222 VMLINUX_SYMBOL(__start___tracepoints_ptrs) = .; \
223 *(__tracepoints_ptrs) /* Tracepoints: pointer array */\
224 VMLINUX_SYMBOL(__stop___tracepoints_ptrs) = .; \
8256e47c 225 *(__markers_strings) /* Markers: strings */ \
97e1c18e 226 *(__tracepoints_strings)/* Tracepoints: strings */ \
1da177e4
LT		 227 } \
228 \
229 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \
230 *(.rodata1) \
231 } \
232 \
6360b1fb
JB		 233 BUG_TABLE \
234 \
1da177e4
LT		 235 /* PCI quirks */ \
236 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \
237 VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \
238 *(.pci_fixup_early) \
239 VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \
240 VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \
241 *(.pci_fixup_header) \
242 VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \
243 VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \
244 *(.pci_fixup_final) \
245 VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \
246 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \
247 *(.pci_fixup_enable) \
248 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \
1597cacb
AC		 249 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \
250 *(.pci_fixup_resume) \
251 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \
e1a2a51e
RW		 252 VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \
253 *(.pci_fixup_resume_early) \
254 VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \
255 VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \
256 *(.pci_fixup_suspend) \
257 VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \
1da177e4
LT		 258 } \
259 \
5658c769
DW		 260 /* Built-in firmware blobs */ \
261 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \
262 VMLINUX_SYMBOL(__start_builtin_fw) = .; \
263 *(.builtin_fw) \
264 VMLINUX_SYMBOL(__end_builtin_fw) = .; \
265 } \
266 \
394b701c 267 /* RapidIO route ops */ \
e5cabeb3 268 .rio_ops : AT(ADDR(.rio_ops) - LOAD_OFFSET) { \
058f88d6
AB		 269 VMLINUX_SYMBOL(__start_rio_switch_ops) = .; \
270 *(.rio_switch_ops) \
271 VMLINUX_SYMBOL(__end_rio_switch_ops) = .; \
394b701c
MP		 272 } \
273 \
63687a52
JB		 274 TRACEDATA \
275 \
1da177e4
LT		 276 /* Kernel symbol table: Normal symbols */ \
277 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \
278 VMLINUX_SYMBOL(__start___ksymtab) = .; \
279 *(__ksymtab) \
280 VMLINUX_SYMBOL(__stop___ksymtab) = .; \
281 } \
282 \
283 /* Kernel symbol table: GPL-only symbols */ \
284 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \
285 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \
286 *(__ksymtab_gpl) \
287 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \
288 } \
289 \
f71d20e9
AV		 290 /* Kernel symbol table: Normal unused symbols */ \
291 __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \
292 VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \
293 *(__ksymtab_unused) \
294 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \
295 } \
296 \
297 /* Kernel symbol table: GPL-only unused symbols */ \
298 __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
299 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \
300 *(__ksymtab_unused_gpl) \
301 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \
302 } \
303 \
9f28bb7e
GKH		 304 /* Kernel symbol table: GPL-future-only symbols */ \
305 __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
306 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \
307 *(__ksymtab_gpl_future) \
308 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \
309 } \
310 \
1da177e4
LT		 311 /* Kernel symbol table: Normal symbols */ \
312 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \
313 VMLINUX_SYMBOL(__start___kcrctab) = .; \
314 *(__kcrctab) \
315 VMLINUX_SYMBOL(__stop___kcrctab) = .; \
316 } \
317 \
318 /* Kernel symbol table: GPL-only symbols */ \
319 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \
320 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \
321 *(__kcrctab_gpl) \
322 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \
323 } \
324 \
f71d20e9
AV		 325 /* Kernel symbol table: Normal unused symbols */ \
326 __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \
327 VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \
328 *(__kcrctab_unused) \
329 VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \
330 } \
331 \
332 /* Kernel symbol table: GPL-only unused symbols */ \
333 __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
334 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \
335 *(__kcrctab_unused_gpl) \
336 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \
337 } \
338 \
9f28bb7e
GKH		 339 /* Kernel symbol table: GPL-future-only symbols */ \
340 __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
341 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \
342 *(__kcrctab_gpl_future) \
343 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \
344 } \
345 \
1da177e4
LT		 346 /* Kernel symbol table: strings */ \
347 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
348 *(__ksymtab_strings) \
349 } \
350 \
eb8f6890
SR		 351 /* __*init sections */ \
352 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \
312b1485 353 *(.ref.rodata) \
eb8f6890
SR		 354 DEV_KEEP(init.rodata) \
355 DEV_KEEP(exit.rodata) \
356 CPU_KEEP(init.rodata) \
357 CPU_KEEP(exit.rodata) \
358 MEM_KEEP(init.rodata) \
359 MEM_KEEP(exit.rodata) \
360 } \
361 \
1da177e4
LT		 362 /* Built-in module parameters. */ \
363 __param : AT(ADDR(__param) - LOAD_OFFSET) { \
364 VMLINUX_SYMBOL(__start___param) = .; \
365 *(__param) \
366 VMLINUX_SYMBOL(__stop___param) = .; \
e94965ed
DT		 367 } \
368 \
369 /* Built-in module versions. */ \
370 __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \
371 VMLINUX_SYMBOL(__start___modver) = .; \
372 *(__modver) \
373 VMLINUX_SYMBOL(__stop___modver) = .; \
edeed305 374 . = ALIGN((align)); \
6569580d 375 VMLINUX_SYMBOL(__end_rodata) = .; \
7583ddfd 376 } \
4096b46f
SR		 377 . = ALIGN((align));
378
ef53dae8 379/* RODATA & RO_DATA provided for backward compatibility.
4096b46f 380 * All archs are supposed to use RO_DATA() */
ef53dae8
SR		 381#define RODATA RO_DATA_SECTION(4096)
382#define RO_DATA(align) RO_DATA_SECTION(align)
1da177e4
LT		 383
384#define SECURITY_INIT \
60bad7fa 385 .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
1da177e4
LT		 386 VMLINUX_SYMBOL(__security_initcall_start) = .; \
387 *(.security_initcall.init) \
388 VMLINUX_SYMBOL(__security_initcall_end) = .; \
389 }
390
7664709b
SR		 391/* .text section. Map to function alignment to avoid address changes
392 * during second ld run in second ld pass when generating System.map */
393#define TEXT_TEXT \
394 ALIGN_FUNCTION(); \
fb5e2b37 395 *(.text.hot) \
0e0d314e 396 *(.text) \
312b1485 397 *(.ref.text) \
eb8f6890
SR		 398 DEV_KEEP(init.text) \
399 DEV_KEEP(exit.text) \
400 CPU_KEEP(init.text) \
401 CPU_KEEP(exit.text) \
402 MEM_KEEP(init.text) \
fb5e2b37
JB		 403 MEM_KEEP(exit.text) \
404 *(.text.unlikely)
eb8f6890 405
7664709b 406
6d30e3a8
SR		 407/* sched.text is aling to function alignment to secure we have same
408 * address even at second ld pass when generating System.map */
1da177e4 409#define SCHED_TEXT \
6d30e3a8 410 ALIGN_FUNCTION(); \
1da177e4
LT		 411 VMLINUX_SYMBOL(__sched_text_start) = .; \
412 *(.sched.text) \
413 VMLINUX_SYMBOL(__sched_text_end) = .;
414
6d30e3a8
SR		 415/* spinlock.text is aling to function alignment to secure we have same
416 * address even at second ld pass when generating System.map */
1da177e4 417#define LOCK_TEXT \
6d30e3a8 418 ALIGN_FUNCTION(); \
1da177e4
LT		 419 VMLINUX_SYMBOL(__lock_text_start) = .; \
420 *(.spinlock.text) \
421 VMLINUX_SYMBOL(__lock_text_end) = .;
d0aaff97
PP		 422
423#define KPROBES_TEXT \
424 ALIGN_FUNCTION(); \
425 VMLINUX_SYMBOL(__kprobes_text_start) = .; \
426 *(.kprobes.text) \
427 VMLINUX_SYMBOL(__kprobes_text_end) = .;
a7d0c210 428
ea714547
JO		 429#define ENTRY_TEXT \
430 ALIGN_FUNCTION(); \
431 VMLINUX_SYMBOL(__entry_text_start) = .; \
432 *(.entry.text) \
433 VMLINUX_SYMBOL(__entry_text_end) = .;
434
a0343e82
FW		 435#ifdef CONFIG_FUNCTION_GRAPH_TRACER
436#define IRQENTRY_TEXT \
437 ALIGN_FUNCTION(); \
438 VMLINUX_SYMBOL(__irqentry_text_start) = .; \
439 *(.irqentry.text) \
440 VMLINUX_SYMBOL(__irqentry_text_end) = .;
441#else
442#define IRQENTRY_TEXT
443#endif
444
37c514e3 445/* Section used for early init (in .S files) */
7923f90f 446#define HEAD_TEXT *(.head.text)
37c514e3 447
7923f90f 448#define HEAD_TEXT_SECTION \
ef53dae8
SR		 449 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \
450 HEAD_TEXT \
451 }
452
453/*
454 * Exception table
455 */
456#define EXCEPTION_TABLE(align) \
457 . = ALIGN(align); \
458 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \
459 VMLINUX_SYMBOL(__start___ex_table) = .; \
460 *(__ex_table) \
461 VMLINUX_SYMBOL(__stop___ex_table) = .; \
462 }
463
464/*
465 * Init task
466 */
39a449d9 467#define INIT_TASK_DATA_SECTION(align) \
ef53dae8 468 . = ALIGN(align); \
da5e37ef 469 .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \
39a449d9 470 INIT_TASK_DATA(align) \
ef53dae8 471 }
37c514e3 472
b99b87f7 473#ifdef CONFIG_CONSTRUCTORS
2a2325e6
HC		 474#define KERNEL_CTORS() . = ALIGN(8); \
475 VMLINUX_SYMBOL(__ctors_start) = .; \
b99b87f7
PO		 476 *(.ctors) \
477 VMLINUX_SYMBOL(__ctors_end) = .;
478#else
479#define KERNEL_CTORS()
480#endif
481
01ba2bdc 482/* init and exit section handling */
eb8f6890
SR		 483#define INIT_DATA \
484 *(.init.data) \
485 DEV_DISCARD(init.data) \
eb8f6890 486 CPU_DISCARD(init.data) \
eb8f6890 487 MEM_DISCARD(init.data) \
b99b87f7 488 KERNEL_CTORS() \
fd6c3a8d 489 *(.init.rodata) \
4b3b4c5e 490 MCOUNT_REC() \
e4a9ea5e 491 FTRACE_EVENTS() \
3d56e331 492 TRACE_SYSCALLS() \
fd6c3a8d
JB		 493 DEV_DISCARD(init.rodata) \
494 CPU_DISCARD(init.rodata) \
aab94339
DB		 495 MEM_DISCARD(init.rodata) \
496 KERNEL_DTB()
eb8f6890
SR		 497
498#define INIT_TEXT \
499 *(.init.text) \
500 DEV_DISCARD(init.text) \
501 CPU_DISCARD(init.text) \
502 MEM_DISCARD(init.text)
503
504#define EXIT_DATA \
505 *(.exit.data) \
506 DEV_DISCARD(exit.data) \
507 DEV_DISCARD(exit.rodata) \
508 CPU_DISCARD(exit.data) \
509 CPU_DISCARD(exit.rodata) \
510 MEM_DISCARD(exit.data) \
511 MEM_DISCARD(exit.rodata)
01ba2bdc 512
eb8f6890
SR		 513#define EXIT_TEXT \
514 *(.exit.text) \
515 DEV_DISCARD(exit.text) \
516 CPU_DISCARD(exit.text) \
517 MEM_DISCARD(exit.text)
01ba2bdc 518
7923f90f
SR		 519#define EXIT_CALL \
520 *(.exitcall.exit)
521
ef53dae8
SR		 522/*
523 * bss (Block Started by Symbol) - uninitialized data
524 * zeroed during startup
525 */
04e448d9
TA		 526#define SBSS(sbss_align) \
527 . = ALIGN(sbss_align); \
ef53dae8
SR		 528 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \
529 *(.sbss) \
530 *(.scommon) \
531 }
532
533#define BSS(bss_align) \
534 . = ALIGN(bss_align); \
535 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \
7c74df07 536 *(.bss..page_aligned) \
ef53dae8
SR		 537 *(.dynbss) \
538 *(.bss) \
539 *(COMMON) \
ef53dae8
SR		 540 }
541
542/*
543 * DWARF debug sections.
544 * Symbols in the DWARF debugging sections are relative to
545 * the beginning of the section so we begin them at 0.
546 */
a7d0c210
PBG		 547#define DWARF_DEBUG \
548 /* DWARF 1 */ \
549 .debug 0 : { *(.debug) } \
550 .line 0 : { *(.line) } \
551 /* GNU DWARF 1 extensions */ \
552 .debug_srcinfo 0 : { *(.debug_srcinfo) } \
553 .debug_sfnames 0 : { *(.debug_sfnames) } \
554 /* DWARF 1.1 and DWARF 2 */ \
555 .debug_aranges 0 : { *(.debug_aranges) } \
556 .debug_pubnames 0 : { *(.debug_pubnames) } \
557 /* DWARF 2 */ \
558 .debug_info 0 : { *(.debug_info \
559 .gnu.linkonce.wi.*) } \
560 .debug_abbrev 0 : { *(.debug_abbrev) } \
561 .debug_line 0 : { *(.debug_line) } \
562 .debug_frame 0 : { *(.debug_frame) } \
563 .debug_str 0 : { *(.debug_str) } \
564 .debug_loc 0 : { *(.debug_loc) } \
565 .debug_macinfo 0 : { *(.debug_macinfo) } \
566 /* SGI/MIPS DWARF 2 extensions */ \
567 .debug_weaknames 0 : { *(.debug_weaknames) } \
568 .debug_funcnames 0 : { *(.debug_funcnames) } \
569 .debug_typenames 0 : { *(.debug_typenames) } \
570 .debug_varnames 0 : { *(.debug_varnames) } \
571
572 /* Stabs debugging sections. */
573#define STABS_DEBUG \
574 .stab 0 : { *(.stab) } \
575 .stabstr 0 : { *(.stabstr) } \
576 .stab.excl 0 : { *(.stab.excl) } \
577 .stab.exclstr 0 : { *(.stab.exclstr) } \
578 .stab.index 0 : { *(.stab.index) } \
579 .stab.indexstr 0 : { *(.stab.indexstr) } \
580 .comment 0 : { *(.comment) }
9c9b8b38 581
6360b1fb 582#ifdef CONFIG_GENERIC_BUG
7664c5a1
JF		 583#define BUG_TABLE \
584 . = ALIGN(8); \
585 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \
c6de0026 586 VMLINUX_SYMBOL(__start___bug_table) = .; \
7664c5a1 587 *(__bug_table) \
c6de0026 588 VMLINUX_SYMBOL(__stop___bug_table) = .; \
7664c5a1 589 }
6360b1fb
JB		 590#else
591#define BUG_TABLE
592#endif
7664c5a1 593
63687a52
JB		 594#ifdef CONFIG_PM_TRACE
595#define TRACEDATA \
596 . = ALIGN(4); \
597 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \
c6de0026 598 VMLINUX_SYMBOL(__tracedata_start) = .; \
63687a52 599 *(.tracedata) \
c6de0026 600 VMLINUX_SYMBOL(__tracedata_end) = .; \
63687a52
JB		 601 }
602#else
603#define TRACEDATA
604#endif
605
9c9b8b38 606#define NOTES \
cbe87121
RM		 607 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \
608 VMLINUX_SYMBOL(__start_notes) = .; \
609 *(.note.*) \
610 VMLINUX_SYMBOL(__stop_notes) = .; \
611 }
61ce1efe 612
ef53dae8
SR		 613#define INIT_SETUP(initsetup_align) \
614 . = ALIGN(initsetup_align); \
615 VMLINUX_SYMBOL(__setup_start) = .; \
616 *(.init.setup) \
617 VMLINUX_SYMBOL(__setup_end) = .;
618
61ce1efe 619#define INITCALLS \
c2147a50 620 *(.initcallearly.init) \
c6de0026 621 VMLINUX_SYMBOL(__early_initcall_end) = .; \
b3438f82
LT		 622 *(.initcall0.init) \
623 *(.initcall0s.init) \
61ce1efe 624 *(.initcall1.init) \
735a7ffb 625 *(.initcall1s.init) \
61ce1efe 626 *(.initcall2.init) \
735a7ffb 627 *(.initcall2s.init) \
61ce1efe 628 *(.initcall3.init) \
735a7ffb 629 *(.initcall3s.init) \
61ce1efe 630 *(.initcall4.init) \
735a7ffb 631 *(.initcall4s.init) \
61ce1efe 632 *(.initcall5.init) \
735a7ffb 633 *(.initcall5s.init) \
8d610dd5 634 *(.initcallrootfs.init) \
61ce1efe 635 *(.initcall6.init) \
735a7ffb
AM		 636 *(.initcall6s.init) \
637 *(.initcall7.init) \
638 *(.initcall7s.init)
61ce1efe 639
ef53dae8
SR		 640#define INIT_CALLS \
641 VMLINUX_SYMBOL(__initcall_start) = .; \
642 INITCALLS \
643 VMLINUX_SYMBOL(__initcall_end) = .;
644
645#define CON_INITCALL \
646 VMLINUX_SYMBOL(__con_initcall_start) = .; \
647 *(.con_initcall.init) \
648 VMLINUX_SYMBOL(__con_initcall_end) = .;
649
650#define SECURITY_INITCALL \
651 VMLINUX_SYMBOL(__security_initcall_start) = .; \
652 *(.security_initcall.init) \
653 VMLINUX_SYMBOL(__security_initcall_end) = .;
654
655#ifdef CONFIG_BLK_DEV_INITRD
656#define INIT_RAM_FS \
d8826262 657 . = ALIGN(4); \
ef53dae8
SR		 658 VMLINUX_SYMBOL(__initramfs_start) = .; \
659 *(.init.ramfs) \
ffe8018c
HB		 660 . = ALIGN(8); \
661 *(.init.ramfs.info)
ef53dae8 662#else
eadfe219 663#define INIT_RAM_FS
ef53dae8
SR		 664#endif
665
023bf6f1
TH		 666/*
667 * Default discarded sections.
668 *
669 * Some archs want to discard exit text/data at runtime rather than
670 * link time due to cross-section references such as alt instructions,
671 * bug table, eh_frame, etc. DISCARDS must be the last of output
672 * section definitions so that such archs put those in earlier section
673 * definitions.
674 */
405d967d
TH		 675#define DISCARDS \
676 /DISCARD/ : { \
677 EXIT_TEXT \
678 EXIT_DATA \
023bf6f1 679 EXIT_CALL \
405d967d 680 *(.discard) \
c7f52cdc 681 *(.discard.*) \
405d967d
TH		 682 }
683
3e5d8f97 684/**
6b7c38d5 685 * PERCPU_VADDR - define output section for percpu area
19df0c2f 686 * @cacheline: cacheline size
3e5d8f97
TH		 687 * @vaddr: explicit base address (optional)
688 * @phdr: destination PHDR (optional)
689 *
19df0c2f
TH		 690 * Macro which expands to output section for percpu area.
691 *
692 * @cacheline is used to align subsections to avoid false cacheline
693 * sharing between subsections for different purposes.
694 *
695 * If @vaddr is not blank, it specifies explicit base address and all
696 * percpu symbols will be offset from the given address. If blank,
697 * @vaddr always equals @laddr + LOAD_OFFSET.
3e5d8f97
TH		 698 *
699 * @phdr defines the output PHDR to use if not blank. Be warned that
700 * output PHDR is sticky. If @phdr is specified, the next output
701 * section in the linker script will go there too. @phdr should have
702 * a leading colon.
703 *
3ac6cffe
TH		 704 * Note that this macros defines __per_cpu_load as an absolute symbol.
705 * If there is no need to put the percpu section at a predetermined
706 * address, use PERCPU().
3e5d8f97 707 */
19df0c2f 708#define PERCPU_VADDR(cacheline, vaddr, phdr) \
dba3d36b 709 VMLINUX_SYMBOL(__per_cpu_load) = .; \
3d9a854c 710 .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \
6b7c38d5
TH		 711 - LOAD_OFFSET) { \
712 VMLINUX_SYMBOL(__per_cpu_start) = .; \
3d9a854c 713 *(.data..percpu..first) \
c957ef2c 714 . = ALIGN(PAGE_SIZE); \
3d9a854c 715 *(.data..percpu..page_aligned) \
19df0c2f 716 . = ALIGN(cacheline); \
c957ef2c 717 *(.data..percpu..readmostly) \
19df0c2f 718 . = ALIGN(cacheline); \
3d9a854c
DV		 719 *(.data..percpu) \
720 *(.data..percpu..shared_aligned) \
6b7c38d5
TH		 721 VMLINUX_SYMBOL(__per_cpu_end) = .; \
722 } phdr \
3d9a854c 723 . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu);
3e5d8f97
TH		 724
725/**
726 * PERCPU - define output section for percpu area, simple version
19df0c2f 727 * @cacheline: cacheline size
3e5d8f97
TH		 728 * @align: required alignment
729 *
19df0c2f
TH		 730 * Align to @align and outputs output section for percpu area. This macro
731 * doesn't manipulate @vaddr or @phdr and __per_cpu_load and
3e5d8f97 732 * __per_cpu_start will be identical.
3ac6cffe 733 *
19df0c2f
TH		 734 * This macro is equivalent to ALIGN(@align); PERCPU_VADDR(@cacheline,,)
735 * except that __per_cpu_load is defined as a relative symbol against
736 * .data..percpu which is required for relocatable x86_32 configuration.
3e5d8f97 737 */
19df0c2f 738#define PERCPU(cacheline, align) \
5fb7dc37 739 . = ALIGN(align); \
3d9a854c 740 .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \
3ac6cffe
TH		 741 VMLINUX_SYMBOL(__per_cpu_load) = .; \
742 VMLINUX_SYMBOL(__per_cpu_start) = .; \
3d9a854c 743 *(.data..percpu..first) \
c957ef2c 744 . = ALIGN(PAGE_SIZE); \
3d9a854c 745 *(.data..percpu..page_aligned) \
19df0c2f 746 . = ALIGN(cacheline); \
2aeb66d3 747 *(.data..percpu..readmostly) \
19df0c2f 748 . = ALIGN(cacheline); \
3d9a854c
DV		 749 *(.data..percpu) \
750 *(.data..percpu..shared_aligned) \
3ac6cffe
TH		 751 VMLINUX_SYMBOL(__per_cpu_end) = .; \
752 }
ef53dae8
SR		 753
754
755/*
756 * Definition of the high level *_SECTION macros
757 * They will fit only a subset of the architectures
758 */
759
760
761/*
762 * Writeable data.
763 * All sections are combined in a single .data section.
764 * The sections following CONSTRUCTORS are arranged so their
765 * typical alignment matches.
766 * A cacheline is typical/always less than a PAGE_SIZE so
767 * the sections that has this restriction (or similar)
768 * is located before the ones requiring PAGE_SIZE alignment.
769 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
770 * matches the requirment of PAGE_ALIGNED_DATA.
771 *
7923f90f 772 * use 0 as page_align if page_aligned data is not used */
73f1d939 773#define RW_DATA_SECTION(cacheline, pagealigned, inittask) \
ef53dae8
SR		 774 . = ALIGN(PAGE_SIZE); \
775 .data : AT(ADDR(.data) - LOAD_OFFSET) { \
39a449d9 776 INIT_TASK_DATA(inittask) \
1b208622
TA		 777 NOSAVE_DATA \
778 PAGE_ALIGNED_DATA(pagealigned) \
ef53dae8
SR		 779 CACHELINE_ALIGNED_DATA(cacheline) \
780 READ_MOSTLY_DATA(cacheline) \
781 DATA_DATA \
782 CONSTRUCTORS \
ef53dae8
SR		 783 }
784
785#define INIT_TEXT_SECTION(inittext_align) \
786 . = ALIGN(inittext_align); \
787 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \
788 VMLINUX_SYMBOL(_sinittext) = .; \
789 INIT_TEXT \
790 VMLINUX_SYMBOL(_einittext) = .; \
791 }
792
793#define INIT_DATA_SECTION(initsetup_align) \
794 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \
795 INIT_DATA \
796 INIT_SETUP(initsetup_align) \
797 INIT_CALLS \
798 CON_INITCALL \
799 SECURITY_INITCALL \
800 INIT_RAM_FS \
801 }
802
04e448d9
TA		 803#define BSS_SECTION(sbss_align, bss_align, stop_align) \
804 . = ALIGN(sbss_align); \
805 VMLINUX_SYMBOL(__bss_start) = .; \
806 SBSS(sbss_align) \
ef53dae8 807 BSS(bss_align) \
04e448d9
TA		 808 . = ALIGN(stop_align); \
809 VMLINUX_SYMBOL(__bss_stop) = .;
Linux kernel - Deliverables
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