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Linux 2.6.38-rc2
[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(...)
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 *
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
b77e38aa
SR		 127#define FTRACE_EVENTS() VMLINUX_SYMBOL(__start_ftrace_events) = .; \
128 *(_ftrace_events) \
129 VMLINUX_SYMBOL(__stop_ftrace_events) = .;
130#else
131#define FTRACE_EVENTS()
132#endif
133
1ba28e02
LJ		 134#ifdef CONFIG_TRACING
135#define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \
136 *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \
137 VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .;
138#else
139#define TRACE_PRINTKS()
140#endif
141
bed1ffca
FW		 142#ifdef CONFIG_FTRACE_SYSCALLS
143#define TRACE_SYSCALLS() VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \
144 *(__syscalls_metadata) \
145 VMLINUX_SYMBOL(__stop_syscalls_metadata) = .;
146#else
147#define TRACE_SYSCALLS()
148#endif
149
aab94339
DB		 150
151#define KERNEL_DTB() \
152 STRUCT_ALIGN(); \
153 VMLINUX_SYMBOL(__dtb_start) = .; \
154 *(.dtb.init.rodata) \
155 VMLINUX_SYMBOL(__dtb_end) = .;
156
ca967258
SR		 157/* .data section */
158#define DATA_DATA \
0e0d314e 159 *(.data) \
312b1485 160 *(.ref.data) \
d356c0b6 161 *(.data..shared_aligned) /* percpu related */ \
eb8f6890
SR		 162 DEV_KEEP(init.data) \
163 DEV_KEEP(exit.data) \
164 CPU_KEEP(init.data) \
165 CPU_KEEP(exit.data) \
166 MEM_KEEP(init.data) \
167 MEM_KEEP(exit.data) \
7e066fb8 168 . = ALIGN(32); \
97e1c18e
MD		 169 VMLINUX_SYMBOL(__start___tracepoints) = .; \
170 *(__tracepoints) \
1f0d69a9 171 VMLINUX_SYMBOL(__stop___tracepoints) = .; \
e9d376f0
JB		 172 /* implement dynamic printk debug */ \
173 . = ALIGN(8); \
174 VMLINUX_SYMBOL(__start___verbose) = .; \
175 *(__verbose) \
176 VMLINUX_SYMBOL(__stop___verbose) = .; \
2bcd521a 177 LIKELY_PROFILE() \
b77e38aa 178 BRANCH_PROFILE() \
8a20d84d 179 TRACE_PRINTKS() \
07fca0e5
SR		 180 \
181 STRUCT_ALIGN(); \
bed1ffca 182 FTRACE_EVENTS() \
07fca0e5
SR		 183 \
184 STRUCT_ALIGN(); \
bed1ffca 185 TRACE_SYSCALLS()
ca967258 186
ef53dae8
SR		 187/*
188 * Data section helpers
189 */
190#define NOSAVE_DATA \
191 . = ALIGN(PAGE_SIZE); \
192 VMLINUX_SYMBOL(__nosave_begin) = .; \
07b3bb1e 193 *(.data..nosave) \
ef53dae8
SR		 194 . = ALIGN(PAGE_SIZE); \
195 VMLINUX_SYMBOL(__nosave_end) = .;
196
197#define PAGE_ALIGNED_DATA(page_align) \
198 . = ALIGN(page_align); \
75b13483 199 *(.data..page_aligned)
ef53dae8
SR		 200
201#define READ_MOSTLY_DATA(align) \
202 . = ALIGN(align); \
8369744f
SL		 203 *(.data..read_mostly) \
204 . = ALIGN(align);
ef53dae8
SR		 205
206#define CACHELINE_ALIGNED_DATA(align) \
207 . = ALIGN(align); \
4af57b78 208 *(.data..cacheline_aligned)
ef53dae8 209
39a449d9 210#define INIT_TASK_DATA(align) \
ef53dae8 211 . = ALIGN(align); \
2af7687f 212 *(.data..init_task)
ef53dae8
SR		 213
214/*
215 * Read only Data
216 */
217#define RO_DATA_SECTION(align) \
4096b46f 218 . = ALIGN((align)); \
1da177e4 219 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \
6569580d 220 VMLINUX_SYMBOL(__start_rodata) = .; \
1da177e4
LT		 221 *(.rodata) *(.rodata.*) \
222 *(__vermagic) /* Kernel version magic */ \
8256e47c 223 *(__markers_strings) /* Markers: strings */ \
97e1c18e 224 *(__tracepoints_strings)/* Tracepoints: strings */ \
1da177e4
LT		 225 } \
226 \
227 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \
228 *(.rodata1) \
229 } \
230 \
6360b1fb
JB		 231 BUG_TABLE \
232 \
bf5438fc
JB		 233 JUMP_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) = .; \
edeed305 367 . = ALIGN((align)); \
6569580d 368 VMLINUX_SYMBOL(__end_rodata) = .; \
7583ddfd 369 } \
4096b46f
SR		 370 . = ALIGN((align));
371
ef53dae8 372/* RODATA & RO_DATA provided for backward compatibility.
4096b46f 373 * All archs are supposed to use RO_DATA() */
ef53dae8
SR		 374#define RODATA RO_DATA_SECTION(4096)
375#define RO_DATA(align) RO_DATA_SECTION(align)
1da177e4
LT		 376
377#define SECURITY_INIT \
60bad7fa 378 .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
1da177e4
LT		 379 VMLINUX_SYMBOL(__security_initcall_start) = .; \
380 *(.security_initcall.init) \
381 VMLINUX_SYMBOL(__security_initcall_end) = .; \
382 }
383
7664709b
SR		 384/* .text section. Map to function alignment to avoid address changes
385 * during second ld run in second ld pass when generating System.map */
386#define TEXT_TEXT \
387 ALIGN_FUNCTION(); \
fb5e2b37 388 *(.text.hot) \
0e0d314e 389 *(.text) \
312b1485 390 *(.ref.text) \
eb8f6890
SR		 391 DEV_KEEP(init.text) \
392 DEV_KEEP(exit.text) \
393 CPU_KEEP(init.text) \
394 CPU_KEEP(exit.text) \
395 MEM_KEEP(init.text) \
fb5e2b37
JB		 396 MEM_KEEP(exit.text) \
397 *(.text.unlikely)
eb8f6890 398
7664709b 399
6d30e3a8
SR		 400/* sched.text is aling to function alignment to secure we have same
401 * address even at second ld pass when generating System.map */
1da177e4 402#define SCHED_TEXT \
6d30e3a8 403 ALIGN_FUNCTION(); \
1da177e4
LT		 404 VMLINUX_SYMBOL(__sched_text_start) = .; \
405 *(.sched.text) \
406 VMLINUX_SYMBOL(__sched_text_end) = .;
407
6d30e3a8
SR		 408/* spinlock.text is aling to function alignment to secure we have same
409 * address even at second ld pass when generating System.map */
1da177e4 410#define LOCK_TEXT \
6d30e3a8 411 ALIGN_FUNCTION(); \
1da177e4
LT		 412 VMLINUX_SYMBOL(__lock_text_start) = .; \
413 *(.spinlock.text) \
414 VMLINUX_SYMBOL(__lock_text_end) = .;
d0aaff97
PP		 415
416#define KPROBES_TEXT \
417 ALIGN_FUNCTION(); \
418 VMLINUX_SYMBOL(__kprobes_text_start) = .; \
419 *(.kprobes.text) \
420 VMLINUX_SYMBOL(__kprobes_text_end) = .;
a7d0c210 421
a0343e82
FW		 422#ifdef CONFIG_FUNCTION_GRAPH_TRACER
423#define IRQENTRY_TEXT \
424 ALIGN_FUNCTION(); \
425 VMLINUX_SYMBOL(__irqentry_text_start) = .; \
426 *(.irqentry.text) \
427 VMLINUX_SYMBOL(__irqentry_text_end) = .;
428#else
429#define IRQENTRY_TEXT
430#endif
431
37c514e3 432/* Section used for early init (in .S files) */
7923f90f 433#define HEAD_TEXT *(.head.text)
37c514e3 434
7923f90f 435#define HEAD_TEXT_SECTION \
ef53dae8
SR		 436 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \
437 HEAD_TEXT \
438 }
439
440/*
441 * Exception table
442 */
443#define EXCEPTION_TABLE(align) \
444 . = ALIGN(align); \
445 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \
446 VMLINUX_SYMBOL(__start___ex_table) = .; \
447 *(__ex_table) \
448 VMLINUX_SYMBOL(__stop___ex_table) = .; \
449 }
450
451/*
452 * Init task
453 */
39a449d9 454#define INIT_TASK_DATA_SECTION(align) \
ef53dae8 455 . = ALIGN(align); \
da5e37ef 456 .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \
39a449d9 457 INIT_TASK_DATA(align) \
ef53dae8 458 }
37c514e3 459
b99b87f7 460#ifdef CONFIG_CONSTRUCTORS
2a2325e6
HC		 461#define KERNEL_CTORS() . = ALIGN(8); \
462 VMLINUX_SYMBOL(__ctors_start) = .; \
b99b87f7
PO		 463 *(.ctors) \
464 VMLINUX_SYMBOL(__ctors_end) = .;
465#else
466#define KERNEL_CTORS()
467#endif
468
01ba2bdc 469/* init and exit section handling */
eb8f6890
SR		 470#define INIT_DATA \
471 *(.init.data) \
472 DEV_DISCARD(init.data) \
eb8f6890 473 CPU_DISCARD(init.data) \
eb8f6890 474 MEM_DISCARD(init.data) \
b99b87f7 475 KERNEL_CTORS() \
fd6c3a8d 476 *(.init.rodata) \
4b3b4c5e 477 MCOUNT_REC() \
fd6c3a8d
JB		 478 DEV_DISCARD(init.rodata) \
479 CPU_DISCARD(init.rodata) \
aab94339
DB		 480 MEM_DISCARD(init.rodata) \
481 KERNEL_DTB()
eb8f6890
SR		 482
483#define INIT_TEXT \
484 *(.init.text) \
485 DEV_DISCARD(init.text) \
486 CPU_DISCARD(init.text) \
487 MEM_DISCARD(init.text)
488
489#define EXIT_DATA \
490 *(.exit.data) \
491 DEV_DISCARD(exit.data) \
492 DEV_DISCARD(exit.rodata) \
493 CPU_DISCARD(exit.data) \
494 CPU_DISCARD(exit.rodata) \
495 MEM_DISCARD(exit.data) \
496 MEM_DISCARD(exit.rodata)
01ba2bdc 497
eb8f6890
SR		 498#define EXIT_TEXT \
499 *(.exit.text) \
500 DEV_DISCARD(exit.text) \
501 CPU_DISCARD(exit.text) \
502 MEM_DISCARD(exit.text)
01ba2bdc 503
7923f90f
SR		 504#define EXIT_CALL \
505 *(.exitcall.exit)
506
ef53dae8
SR		 507/*
508 * bss (Block Started by Symbol) - uninitialized data
509 * zeroed during startup
510 */
04e448d9
TA		 511#define SBSS(sbss_align) \
512 . = ALIGN(sbss_align); \
ef53dae8
SR		 513 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \
514 *(.sbss) \
515 *(.scommon) \
516 }
517
518#define BSS(bss_align) \
519 . = ALIGN(bss_align); \
520 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \
7c74df07 521 *(.bss..page_aligned) \
ef53dae8
SR		 522 *(.dynbss) \
523 *(.bss) \
524 *(COMMON) \
ef53dae8
SR		 525 }
526
527/*
528 * DWARF debug sections.
529 * Symbols in the DWARF debugging sections are relative to
530 * the beginning of the section so we begin them at 0.
531 */
a7d0c210
PBG		 532#define DWARF_DEBUG \
533 /* DWARF 1 */ \
534 .debug 0 : { *(.debug) } \
535 .line 0 : { *(.line) } \
536 /* GNU DWARF 1 extensions */ \
537 .debug_srcinfo 0 : { *(.debug_srcinfo) } \
538 .debug_sfnames 0 : { *(.debug_sfnames) } \
539 /* DWARF 1.1 and DWARF 2 */ \
540 .debug_aranges 0 : { *(.debug_aranges) } \
541 .debug_pubnames 0 : { *(.debug_pubnames) } \
542 /* DWARF 2 */ \
543 .debug_info 0 : { *(.debug_info \
544 .gnu.linkonce.wi.*) } \
545 .debug_abbrev 0 : { *(.debug_abbrev) } \
546 .debug_line 0 : { *(.debug_line) } \
547 .debug_frame 0 : { *(.debug_frame) } \
548 .debug_str 0 : { *(.debug_str) } \
549 .debug_loc 0 : { *(.debug_loc) } \
550 .debug_macinfo 0 : { *(.debug_macinfo) } \
551 /* SGI/MIPS DWARF 2 extensions */ \
552 .debug_weaknames 0 : { *(.debug_weaknames) } \
553 .debug_funcnames 0 : { *(.debug_funcnames) } \
554 .debug_typenames 0 : { *(.debug_typenames) } \
555 .debug_varnames 0 : { *(.debug_varnames) } \
556
557 /* Stabs debugging sections. */
558#define STABS_DEBUG \
559 .stab 0 : { *(.stab) } \
560 .stabstr 0 : { *(.stabstr) } \
561 .stab.excl 0 : { *(.stab.excl) } \
562 .stab.exclstr 0 : { *(.stab.exclstr) } \
563 .stab.index 0 : { *(.stab.index) } \
564 .stab.indexstr 0 : { *(.stab.indexstr) } \
565 .comment 0 : { *(.comment) }
9c9b8b38 566
6360b1fb 567#ifdef CONFIG_GENERIC_BUG
7664c5a1
JF		 568#define BUG_TABLE \
569 . = ALIGN(8); \
570 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \
c6de0026 571 VMLINUX_SYMBOL(__start___bug_table) = .; \
7664c5a1 572 *(__bug_table) \
c6de0026 573 VMLINUX_SYMBOL(__stop___bug_table) = .; \
7664c5a1 574 }
6360b1fb
JB		 575#else
576#define BUG_TABLE
577#endif
7664c5a1 578
bf5438fc
JB		 579#define JUMP_TABLE \
580 . = ALIGN(8); \
581 __jump_table : AT(ADDR(__jump_table) - LOAD_OFFSET) { \
582 VMLINUX_SYMBOL(__start___jump_table) = .; \
583 *(__jump_table) \
584 VMLINUX_SYMBOL(__stop___jump_table) = .; \
585 }
586
63687a52
JB		 587#ifdef CONFIG_PM_TRACE
588#define TRACEDATA \
589 . = ALIGN(4); \
590 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \
c6de0026 591 VMLINUX_SYMBOL(__tracedata_start) = .; \
63687a52 592 *(.tracedata) \
c6de0026 593 VMLINUX_SYMBOL(__tracedata_end) = .; \
63687a52
JB		 594 }
595#else
596#define TRACEDATA
597#endif
598
9c9b8b38 599#define NOTES \
cbe87121
RM		 600 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \
601 VMLINUX_SYMBOL(__start_notes) = .; \
602 *(.note.*) \
603 VMLINUX_SYMBOL(__stop_notes) = .; \
604 }
61ce1efe 605
ef53dae8
SR		 606#define INIT_SETUP(initsetup_align) \
607 . = ALIGN(initsetup_align); \
608 VMLINUX_SYMBOL(__setup_start) = .; \
609 *(.init.setup) \
610 VMLINUX_SYMBOL(__setup_end) = .;
611
61ce1efe 612#define INITCALLS \
c2147a50 613 *(.initcallearly.init) \
c6de0026 614 VMLINUX_SYMBOL(__early_initcall_end) = .; \
b3438f82
LT		 615 *(.initcall0.init) \
616 *(.initcall0s.init) \
61ce1efe 617 *(.initcall1.init) \
735a7ffb 618 *(.initcall1s.init) \
61ce1efe 619 *(.initcall2.init) \
735a7ffb 620 *(.initcall2s.init) \
61ce1efe 621 *(.initcall3.init) \
735a7ffb 622 *(.initcall3s.init) \
61ce1efe 623 *(.initcall4.init) \
735a7ffb 624 *(.initcall4s.init) \
61ce1efe 625 *(.initcall5.init) \
735a7ffb 626 *(.initcall5s.init) \
8d610dd5 627 *(.initcallrootfs.init) \
61ce1efe 628 *(.initcall6.init) \
735a7ffb
AM		 629 *(.initcall6s.init) \
630 *(.initcall7.init) \
631 *(.initcall7s.init)
61ce1efe 632
ef53dae8
SR		 633#define INIT_CALLS \
634 VMLINUX_SYMBOL(__initcall_start) = .; \
635 INITCALLS \
636 VMLINUX_SYMBOL(__initcall_end) = .;
637
638#define CON_INITCALL \
639 VMLINUX_SYMBOL(__con_initcall_start) = .; \
640 *(.con_initcall.init) \
641 VMLINUX_SYMBOL(__con_initcall_end) = .;
642
643#define SECURITY_INITCALL \
644 VMLINUX_SYMBOL(__security_initcall_start) = .; \
645 *(.security_initcall.init) \
646 VMLINUX_SYMBOL(__security_initcall_end) = .;
647
648#ifdef CONFIG_BLK_DEV_INITRD
649#define INIT_RAM_FS \
d8826262 650 . = ALIGN(4); \
ef53dae8
SR		 651 VMLINUX_SYMBOL(__initramfs_start) = .; \
652 *(.init.ramfs) \
ffe8018c
HB		 653 . = ALIGN(8); \
654 *(.init.ramfs.info)
ef53dae8 655#else
eadfe219 656#define INIT_RAM_FS
ef53dae8
SR		 657#endif
658
023bf6f1
TH		 659/*
660 * Default discarded sections.
661 *
662 * Some archs want to discard exit text/data at runtime rather than
663 * link time due to cross-section references such as alt instructions,
664 * bug table, eh_frame, etc. DISCARDS must be the last of output
665 * section definitions so that such archs put those in earlier section
666 * definitions.
667 */
405d967d
TH		 668#define DISCARDS \
669 /DISCARD/ : { \
670 EXIT_TEXT \
671 EXIT_DATA \
023bf6f1 672 EXIT_CALL \
405d967d 673 *(.discard) \
c7f52cdc 674 *(.discard.*) \
405d967d
TH		 675 }
676
3e5d8f97 677/**
6b7c38d5 678 * PERCPU_VADDR - define output section for percpu area
3e5d8f97
TH		 679 * @vaddr: explicit base address (optional)
680 * @phdr: destination PHDR (optional)
681 *
682 * Macro which expands to output section for percpu area. If @vaddr
683 * is not blank, it specifies explicit base address and all percpu
684 * symbols will be offset from the given address. If blank, @vaddr
685 * always equals @laddr + LOAD_OFFSET.
686 *
687 * @phdr defines the output PHDR to use if not blank. Be warned that
688 * output PHDR is sticky. If @phdr is specified, the next output
689 * section in the linker script will go there too. @phdr should have
690 * a leading colon.
691 *
3ac6cffe
TH		 692 * Note that this macros defines __per_cpu_load as an absolute symbol.
693 * If there is no need to put the percpu section at a predetermined
694 * address, use PERCPU().
3e5d8f97
TH		 695 */
696#define PERCPU_VADDR(vaddr, phdr) \
dba3d36b 697 VMLINUX_SYMBOL(__per_cpu_load) = .; \
3d9a854c 698 .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \
6b7c38d5
TH		 699 - LOAD_OFFSET) { \
700 VMLINUX_SYMBOL(__per_cpu_start) = .; \
3d9a854c 701 *(.data..percpu..first) \
c957ef2c 702 . = ALIGN(PAGE_SIZE); \
3d9a854c 703 *(.data..percpu..page_aligned) \
c957ef2c 704 *(.data..percpu..readmostly) \
3d9a854c
DV		 705 *(.data..percpu) \
706 *(.data..percpu..shared_aligned) \
6b7c38d5
TH		 707 VMLINUX_SYMBOL(__per_cpu_end) = .; \
708 } phdr \
3d9a854c 709 . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu);
3e5d8f97
TH		 710
711/**
712 * PERCPU - define output section for percpu area, simple version
713 * @align: required alignment
714 *
715 * Align to @align and outputs output section for percpu area. This
716 * macro doesn't maniuplate @vaddr or @phdr and __per_cpu_load and
717 * __per_cpu_start will be identical.
3ac6cffe
TH		 718 *
719 * This macro is equivalent to ALIGN(align); PERCPU_VADDR( , ) except
720 * that __per_cpu_load is defined as a relative symbol against
3d9a854c 721 * .data..percpu which is required for relocatable x86_32
3ac6cffe 722 * configuration.
3e5d8f97 723 */
5fb7dc37
FY		 724#define PERCPU(align) \
725 . = ALIGN(align); \
3d9a854c 726 .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \
3ac6cffe
TH		 727 VMLINUX_SYMBOL(__per_cpu_load) = .; \
728 VMLINUX_SYMBOL(__per_cpu_start) = .; \
3d9a854c 729 *(.data..percpu..first) \
c957ef2c 730 . = ALIGN(PAGE_SIZE); \
3d9a854c 731 *(.data..percpu..page_aligned) \
2aeb66d3 732 *(.data..percpu..readmostly) \
3d9a854c
DV		 733 *(.data..percpu) \
734 *(.data..percpu..shared_aligned) \
3ac6cffe
TH		 735 VMLINUX_SYMBOL(__per_cpu_end) = .; \
736 }
ef53dae8
SR		 737
738
739/*
740 * Definition of the high level *_SECTION macros
741 * They will fit only a subset of the architectures
742 */
743
744
745/*
746 * Writeable data.
747 * All sections are combined in a single .data section.
748 * The sections following CONSTRUCTORS are arranged so their
749 * typical alignment matches.
750 * A cacheline is typical/always less than a PAGE_SIZE so
751 * the sections that has this restriction (or similar)
752 * is located before the ones requiring PAGE_SIZE alignment.
753 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
754 * matches the requirment of PAGE_ALIGNED_DATA.
755 *
7923f90f 756 * use 0 as page_align if page_aligned data is not used */
73f1d939 757#define RW_DATA_SECTION(cacheline, pagealigned, inittask) \
ef53dae8
SR		 758 . = ALIGN(PAGE_SIZE); \
759 .data : AT(ADDR(.data) - LOAD_OFFSET) { \
39a449d9 760 INIT_TASK_DATA(inittask) \
1b208622
TA		 761 NOSAVE_DATA \
762 PAGE_ALIGNED_DATA(pagealigned) \
ef53dae8
SR		 763 CACHELINE_ALIGNED_DATA(cacheline) \
764 READ_MOSTLY_DATA(cacheline) \
765 DATA_DATA \
766 CONSTRUCTORS \
ef53dae8
SR		 767 }
768
769#define INIT_TEXT_SECTION(inittext_align) \
770 . = ALIGN(inittext_align); \
771 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \
772 VMLINUX_SYMBOL(_sinittext) = .; \
773 INIT_TEXT \
774 VMLINUX_SYMBOL(_einittext) = .; \
775 }
776
777#define INIT_DATA_SECTION(initsetup_align) \
778 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \
779 INIT_DATA \
780 INIT_SETUP(initsetup_align) \
781 INIT_CALLS \
782 CON_INITCALL \
783 SECURITY_INITCALL \
784 INIT_RAM_FS \
785 }
786
04e448d9
TA		 787#define BSS_SECTION(sbss_align, bss_align, stop_align) \
788 . = ALIGN(sbss_align); \
789 VMLINUX_SYMBOL(__bss_start) = .; \
790 SBSS(sbss_align) \
ef53dae8 791 BSS(bss_align) \
04e448d9
TA		 792 . = ALIGN(stop_align); \
793 VMLINUX_SYMBOL(__bss_stop) = .;
Linux kernel - Deliverables
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