eb58d2d7d9718d0c220387b3c60febf30f324e71
[linux-3.10.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  * [_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  */
50
51 #ifndef LOAD_OFFSET
52 #define LOAD_OFFSET 0
53 #endif
54
55 #include <linux/export.h>
56
57 /* Align . to a 8 byte boundary equals to maximum function alignment. */
58 #define ALIGN_FUNCTION()  . = ALIGN(8)
59
60 /*
61  * Align to a 32 byte boundary equal to the
62  * alignment gcc 4.5 uses for a struct
63  */
64 #define STRUCT_ALIGNMENT 32
65 #define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT)
66
67 /* The actual configuration determine if the init/exit sections
68  * are handled as text/data or they can be discarded (which
69  * often happens at runtime)
70  */
71 #ifdef CONFIG_HOTPLUG
72 #define DEV_KEEP(sec)    *(.dev##sec)
73 #define DEV_DISCARD(sec)
74 #else
75 #define DEV_KEEP(sec)
76 #define DEV_DISCARD(sec) *(.dev##sec)
77 #endif
78
79 #ifdef CONFIG_HOTPLUG_CPU
80 #define CPU_KEEP(sec)    *(.cpu##sec)
81 #define CPU_DISCARD(sec)
82 #else
83 #define CPU_KEEP(sec)
84 #define CPU_DISCARD(sec) *(.cpu##sec)
85 #endif
86
87 #if defined(CONFIG_MEMORY_HOTPLUG)
88 #define MEM_KEEP(sec)    *(.mem##sec)
89 #define MEM_DISCARD(sec)
90 #else
91 #define MEM_KEEP(sec)
92 #define MEM_DISCARD(sec) *(.mem##sec)
93 #endif
94
95 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
96 #define MCOUNT_REC()    . = ALIGN(8);                           \
97                         VMLINUX_SYMBOL(__start_mcount_loc) = .; \
98                         *(__mcount_loc)                         \
99                         VMLINUX_SYMBOL(__stop_mcount_loc) = .;
100 #else
101 #define MCOUNT_REC()
102 #endif
103
104 #ifdef CONFIG_TRACE_BRANCH_PROFILING
105 #define LIKELY_PROFILE()        VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \
106                                 *(_ftrace_annotated_branch)                           \
107                                 VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .;
108 #else
109 #define LIKELY_PROFILE()
110 #endif
111
112 #ifdef CONFIG_PROFILE_ALL_BRANCHES
113 #define BRANCH_PROFILE()        VMLINUX_SYMBOL(__start_branch_profile) = .;   \
114                                 *(_ftrace_branch)                             \
115                                 VMLINUX_SYMBOL(__stop_branch_profile) = .;
116 #else
117 #define BRANCH_PROFILE()
118 #endif
119
120 #ifdef CONFIG_EVENT_TRACING
121 #define FTRACE_EVENTS() . = ALIGN(8);                                   \
122                         VMLINUX_SYMBOL(__start_ftrace_events) = .;      \
123                         *(_ftrace_events)                               \
124                         VMLINUX_SYMBOL(__stop_ftrace_events) = .;
125 #else
126 #define FTRACE_EVENTS()
127 #endif
128
129 #ifdef CONFIG_TRACING
130 #define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .;      \
131                          *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \
132                          VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .;
133 #else
134 #define TRACE_PRINTKS()
135 #endif
136
137 #ifdef CONFIG_FTRACE_SYSCALLS
138 #define TRACE_SYSCALLS() . = ALIGN(8);                                  \
139                          VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \
140                          *(__syscalls_metadata)                         \
141                          VMLINUX_SYMBOL(__stop_syscalls_metadata) = .;
142 #else
143 #define TRACE_SYSCALLS()
144 #endif
145
146 #ifdef CONFIG_CLKSRC_OF
147 #define CLKSRC_OF_TABLES() . = ALIGN(8);                                \
148                            VMLINUX_SYMBOL(__clksrc_of_table) = .;       \
149                            *(__clksrc_of_table)                         \
150                            *(__clksrc_of_table_end)
151 #else
152 #define CLKSRC_OF_TABLES()
153 #endif
154
155 #ifdef CONFIG_IRQCHIP
156 #define IRQCHIP_OF_MATCH_TABLE()                                        \
157         . = ALIGN(8);                                                   \
158         VMLINUX_SYMBOL(__irqchip_begin) = .;                            \
159         *(__irqchip_of_table)                                           \
160         *(__irqchip_of_end)
161 #else
162 #define IRQCHIP_OF_MATCH_TABLE()
163 #endif
164
165 #ifdef CONFIG_COMMON_CLK
166 #define CLK_OF_TABLES() . = ALIGN(8);                           \
167                         VMLINUX_SYMBOL(__clk_of_table) = .;     \
168                         *(__clk_of_table)                       \
169                         *(__clk_of_table_end)
170 #else
171 #define CLK_OF_TABLES()
172 #endif
173
174 #define KERNEL_DTB()                                                    \
175         STRUCT_ALIGN();                                                 \
176         VMLINUX_SYMBOL(__dtb_start) = .;                                \
177         *(.dtb.init.rodata)                                             \
178         VMLINUX_SYMBOL(__dtb_end) = .;
179
180 /* .data section */
181 #define DATA_DATA                                                       \
182         *(.data)                                                        \
183         *(.ref.data)                                                    \
184         *(.data..shared_aligned) /* percpu related */                   \
185         DEV_KEEP(init.data)                                             \
186         DEV_KEEP(exit.data)                                             \
187         CPU_KEEP(init.data)                                             \
188         CPU_KEEP(exit.data)                                             \
189         MEM_KEEP(init.data)                                             \
190         MEM_KEEP(exit.data)                                             \
191         *(.data.unlikely)                                               \
192         STRUCT_ALIGN();                                                 \
193         *(__tracepoints)                                                \
194         /* implement dynamic printk debug */                            \
195         . = ALIGN(8);                                                   \
196         VMLINUX_SYMBOL(__start___jump_table) = .;                       \
197         *(__jump_table)                                                 \
198         VMLINUX_SYMBOL(__stop___jump_table) = .;                        \
199         . = ALIGN(8);                                                   \
200         VMLINUX_SYMBOL(__start___verbose) = .;                          \
201         *(__verbose)                                                    \
202         VMLINUX_SYMBOL(__stop___verbose) = .;                           \
203         LIKELY_PROFILE()                                                \
204         BRANCH_PROFILE()                                                \
205         TRACE_PRINTKS()
206
207 /*
208  * Data section helpers
209  */
210 #define NOSAVE_DATA                                                     \
211         . = ALIGN(PAGE_SIZE);                                           \
212         VMLINUX_SYMBOL(__nosave_begin) = .;                             \
213         *(.data..nosave)                                                \
214         . = ALIGN(PAGE_SIZE);                                           \
215         VMLINUX_SYMBOL(__nosave_end) = .;
216
217 #define PAGE_ALIGNED_DATA(page_align)                                   \
218         . = ALIGN(page_align);                                          \
219         *(.data..page_aligned)
220
221 #define READ_MOSTLY_DATA(align)                                         \
222         . = ALIGN(align);                                               \
223         *(.data..read_mostly)                                           \
224         . = ALIGN(align);
225
226 #define CACHELINE_ALIGNED_DATA(align)                                   \
227         . = ALIGN(align);                                               \
228         *(.data..cacheline_aligned)
229
230 #define INIT_TASK_DATA(align)                                           \
231         . = ALIGN(align);                                               \
232         *(.data..init_task)
233
234 /*
235  * Read only Data
236  */
237 #define RO_DATA_SECTION(align)                                          \
238         . = ALIGN((align));                                             \
239         .rodata           : AT(ADDR(.rodata) - LOAD_OFFSET) {           \
240                 VMLINUX_SYMBOL(__start_rodata) = .;                     \
241                 *(.rodata) *(.rodata.*)                                 \
242                 *(__vermagic)           /* Kernel version magic */      \
243                 . = ALIGN(8);                                           \
244                 VMLINUX_SYMBOL(__start___tracepoints_ptrs) = .;         \
245                 *(__tracepoints_ptrs)   /* Tracepoints: pointer array */\
246                 VMLINUX_SYMBOL(__stop___tracepoints_ptrs) = .;          \
247                 *(__tracepoints_strings)/* Tracepoints: strings */      \
248         }                                                               \
249                                                                         \
250         .rodata1          : AT(ADDR(.rodata1) - LOAD_OFFSET) {          \
251                 *(.rodata1)                                             \
252         }                                                               \
253                                                                         \
254         BUG_TABLE                                                       \
255                                                                         \
256         /* PCI quirks */                                                \
257         .pci_fixup        : AT(ADDR(.pci_fixup) - LOAD_OFFSET) {        \
258                 VMLINUX_SYMBOL(__start_pci_fixups_early) = .;           \
259                 *(.pci_fixup_early)                                     \
260                 VMLINUX_SYMBOL(__end_pci_fixups_early) = .;             \
261                 VMLINUX_SYMBOL(__start_pci_fixups_header) = .;          \
262                 *(.pci_fixup_header)                                    \
263                 VMLINUX_SYMBOL(__end_pci_fixups_header) = .;            \
264                 VMLINUX_SYMBOL(__start_pci_fixups_final) = .;           \
265                 *(.pci_fixup_final)                                     \
266                 VMLINUX_SYMBOL(__end_pci_fixups_final) = .;             \
267                 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .;          \
268                 *(.pci_fixup_enable)                                    \
269                 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .;            \
270                 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .;          \
271                 *(.pci_fixup_resume)                                    \
272                 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .;            \
273                 VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .;    \
274                 *(.pci_fixup_resume_early)                              \
275                 VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .;      \
276                 VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .;         \
277                 *(.pci_fixup_suspend)                                   \
278                 VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .;           \
279         }                                                               \
280                                                                         \
281         /* Built-in firmware blobs */                                   \
282         .builtin_fw        : AT(ADDR(.builtin_fw) - LOAD_OFFSET) {      \
283                 VMLINUX_SYMBOL(__start_builtin_fw) = .;                 \
284                 *(.builtin_fw)                                          \
285                 VMLINUX_SYMBOL(__end_builtin_fw) = .;                   \
286         }                                                               \
287                                                                         \
288         /* RapidIO route ops */                                         \
289         .rio_ops        : AT(ADDR(.rio_ops) - LOAD_OFFSET) {            \
290                 VMLINUX_SYMBOL(__start_rio_switch_ops) = .;             \
291                 *(.rio_switch_ops)                                      \
292                 VMLINUX_SYMBOL(__end_rio_switch_ops) = .;               \
293         }                                                               \
294                                                                         \
295         TRACEDATA                                                       \
296                                                                         \
297         /* Kernel symbol table: Normal symbols */                       \
298         __ksymtab         : AT(ADDR(__ksymtab) - LOAD_OFFSET) {         \
299                 VMLINUX_SYMBOL(__start___ksymtab) = .;                  \
300                 *(SORT(___ksymtab+*))                                   \
301                 VMLINUX_SYMBOL(__stop___ksymtab) = .;                   \
302         }                                                               \
303                                                                         \
304         /* Kernel symbol table: GPL-only symbols */                     \
305         __ksymtab_gpl     : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) {     \
306                 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .;              \
307                 *(SORT(___ksymtab_gpl+*))                               \
308                 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .;               \
309         }                                                               \
310                                                                         \
311         /* Kernel symbol table: Normal unused symbols */                \
312         __ksymtab_unused  : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) {  \
313                 VMLINUX_SYMBOL(__start___ksymtab_unused) = .;           \
314                 *(SORT(___ksymtab_unused+*))                            \
315                 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .;            \
316         }                                                               \
317                                                                         \
318         /* Kernel symbol table: GPL-only unused symbols */              \
319         __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
320                 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .;       \
321                 *(SORT(___ksymtab_unused_gpl+*))                        \
322                 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .;        \
323         }                                                               \
324                                                                         \
325         /* Kernel symbol table: GPL-future-only symbols */              \
326         __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
327                 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .;       \
328                 *(SORT(___ksymtab_gpl_future+*))                        \
329                 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .;        \
330         }                                                               \
331                                                                         \
332         /* Kernel symbol table: Normal symbols */                       \
333         __kcrctab         : AT(ADDR(__kcrctab) - LOAD_OFFSET) {         \
334                 VMLINUX_SYMBOL(__start___kcrctab) = .;                  \
335                 *(SORT(___kcrctab+*))                                   \
336                 VMLINUX_SYMBOL(__stop___kcrctab) = .;                   \
337         }                                                               \
338                                                                         \
339         /* Kernel symbol table: GPL-only symbols */                     \
340         __kcrctab_gpl     : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) {     \
341                 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .;              \
342                 *(SORT(___kcrctab_gpl+*))                               \
343                 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .;               \
344         }                                                               \
345                                                                         \
346         /* Kernel symbol table: Normal unused symbols */                \
347         __kcrctab_unused  : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) {  \
348                 VMLINUX_SYMBOL(__start___kcrctab_unused) = .;           \
349                 *(SORT(___kcrctab_unused+*))                            \
350                 VMLINUX_SYMBOL(__stop___kcrctab_unused) = .;            \
351         }                                                               \
352                                                                         \
353         /* Kernel symbol table: GPL-only unused symbols */              \
354         __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
355                 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .;       \
356                 *(SORT(___kcrctab_unused_gpl+*))                        \
357                 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .;        \
358         }                                                               \
359                                                                         \
360         /* Kernel symbol table: GPL-future-only symbols */              \
361         __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
362                 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .;       \
363                 *(SORT(___kcrctab_gpl_future+*))                        \
364                 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .;        \
365         }                                                               \
366                                                                         \
367         /* Kernel symbol table: strings */                              \
368         __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
369                 *(__ksymtab_strings)                                    \
370         }                                                               \
371                                                                         \
372         /* __*init sections */                                          \
373         __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) {         \
374                 *(.ref.rodata)                                          \
375                 DEV_KEEP(init.rodata)                                   \
376                 DEV_KEEP(exit.rodata)                                   \
377                 CPU_KEEP(init.rodata)                                   \
378                 CPU_KEEP(exit.rodata)                                   \
379                 MEM_KEEP(init.rodata)                                   \
380                 MEM_KEEP(exit.rodata)                                   \
381         }                                                               \
382                                                                         \
383         /* Built-in module parameters. */                               \
384         __param : AT(ADDR(__param) - LOAD_OFFSET) {                     \
385                 VMLINUX_SYMBOL(__start___param) = .;                    \
386                 *(__param)                                              \
387                 VMLINUX_SYMBOL(__stop___param) = .;                     \
388         }                                                               \
389                                                                         \
390         /* Built-in module versions. */                                 \
391         __modver : AT(ADDR(__modver) - LOAD_OFFSET) {                   \
392                 VMLINUX_SYMBOL(__start___modver) = .;                   \
393                 *(__modver)                                             \
394                 VMLINUX_SYMBOL(__stop___modver) = .;                    \
395                 . = ALIGN((align));                                     \
396                 VMLINUX_SYMBOL(__end_rodata) = .;                       \
397         }                                                               \
398         . = ALIGN((align));
399
400 /* RODATA & RO_DATA provided for backward compatibility.
401  * All archs are supposed to use RO_DATA() */
402 #define RODATA          RO_DATA_SECTION(4096)
403 #define RO_DATA(align)  RO_DATA_SECTION(align)
404
405 #define SECURITY_INIT                                                   \
406         .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
407                 VMLINUX_SYMBOL(__security_initcall_start) = .;          \
408                 *(.security_initcall.init)                              \
409                 VMLINUX_SYMBOL(__security_initcall_end) = .;            \
410         }
411
412 /* .text section. Map to function alignment to avoid address changes
413  * during second ld run in second ld pass when generating System.map */
414 #define TEXT_TEXT                                                       \
415                 ALIGN_FUNCTION();                                       \
416                 *(.text.hot)                                            \
417                 *(.text)                                                \
418                 *(.ref.text)                                            \
419         DEV_KEEP(init.text)                                             \
420         DEV_KEEP(exit.text)                                             \
421         CPU_KEEP(init.text)                                             \
422         CPU_KEEP(exit.text)                                             \
423         MEM_KEEP(init.text)                                             \
424         MEM_KEEP(exit.text)                                             \
425                 *(.text.unlikely)
426
427
428 /* sched.text is aling to function alignment to secure we have same
429  * address even at second ld pass when generating System.map */
430 #define SCHED_TEXT                                                      \
431                 ALIGN_FUNCTION();                                       \
432                 VMLINUX_SYMBOL(__sched_text_start) = .;                 \
433                 *(.sched.text)                                          \
434                 VMLINUX_SYMBOL(__sched_text_end) = .;
435
436 /* spinlock.text is aling to function alignment to secure we have same
437  * address even at second ld pass when generating System.map */
438 #define LOCK_TEXT                                                       \
439                 ALIGN_FUNCTION();                                       \
440                 VMLINUX_SYMBOL(__lock_text_start) = .;                  \
441                 *(.spinlock.text)                                       \
442                 VMLINUX_SYMBOL(__lock_text_end) = .;
443
444 #define KPROBES_TEXT                                                    \
445                 ALIGN_FUNCTION();                                       \
446                 VMLINUX_SYMBOL(__kprobes_text_start) = .;               \
447                 *(.kprobes.text)                                        \
448                 VMLINUX_SYMBOL(__kprobes_text_end) = .;
449
450 #define ENTRY_TEXT                                                      \
451                 ALIGN_FUNCTION();                                       \
452                 VMLINUX_SYMBOL(__entry_text_start) = .;                 \
453                 *(.entry.text)                                          \
454                 VMLINUX_SYMBOL(__entry_text_end) = .;
455
456 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
457 #define IRQENTRY_TEXT                                                   \
458                 ALIGN_FUNCTION();                                       \
459                 VMLINUX_SYMBOL(__irqentry_text_start) = .;              \
460                 *(.irqentry.text)                                       \
461                 VMLINUX_SYMBOL(__irqentry_text_end) = .;
462 #else
463 #define IRQENTRY_TEXT
464 #endif
465
466 /* Section used for early init (in .S files) */
467 #define HEAD_TEXT  *(.head.text)
468
469 #define HEAD_TEXT_SECTION                                                       \
470         .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) {               \
471                 HEAD_TEXT                                               \
472         }
473
474 /*
475  * Exception table
476  */
477 #define EXCEPTION_TABLE(align)                                          \
478         . = ALIGN(align);                                               \
479         __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {               \
480                 VMLINUX_SYMBOL(__start___ex_table) = .;                 \
481                 *(__ex_table)                                           \
482                 VMLINUX_SYMBOL(__stop___ex_table) = .;                  \
483         }
484
485 /*
486  * Init task
487  */
488 #define INIT_TASK_DATA_SECTION(align)                                   \
489         . = ALIGN(align);                                               \
490         .data..init_task :  AT(ADDR(.data..init_task) - LOAD_OFFSET) {  \
491                 INIT_TASK_DATA(align)                                   \
492         }
493
494 #ifdef CONFIG_CONSTRUCTORS
495 #define KERNEL_CTORS()  . = ALIGN(8);                      \
496                         VMLINUX_SYMBOL(__ctors_start) = .; \
497                         *(.ctors)                          \
498                         VMLINUX_SYMBOL(__ctors_end) = .;
499 #else
500 #define KERNEL_CTORS()
501 #endif
502
503 /* init and exit section handling */
504 #define INIT_DATA                                                       \
505         *(.init.data)                                                   \
506         DEV_DISCARD(init.data)                                          \
507         CPU_DISCARD(init.data)                                          \
508         MEM_DISCARD(init.data)                                          \
509         KERNEL_CTORS()                                                  \
510         MCOUNT_REC()                                                    \
511         *(.init.rodata)                                                 \
512         FTRACE_EVENTS()                                                 \
513         TRACE_SYSCALLS()                                                \
514         DEV_DISCARD(init.rodata)                                        \
515         CPU_DISCARD(init.rodata)                                        \
516         MEM_DISCARD(init.rodata)                                        \
517         CLK_OF_TABLES()                                                 \
518         CLKSRC_OF_TABLES()                                              \
519         KERNEL_DTB()                                                    \
520         IRQCHIP_OF_MATCH_TABLE()
521
522 #define INIT_TEXT                                                       \
523         *(.init.text)                                                   \
524         DEV_DISCARD(init.text)                                          \
525         CPU_DISCARD(init.text)                                          \
526         MEM_DISCARD(init.text)
527
528 #define EXIT_DATA                                                       \
529         *(.exit.data)                                                   \
530         DEV_DISCARD(exit.data)                                          \
531         DEV_DISCARD(exit.rodata)                                        \
532         CPU_DISCARD(exit.data)                                          \
533         CPU_DISCARD(exit.rodata)                                        \
534         MEM_DISCARD(exit.data)                                          \
535         MEM_DISCARD(exit.rodata)
536
537 #define EXIT_TEXT                                                       \
538         *(.exit.text)                                                   \
539         DEV_DISCARD(exit.text)                                          \
540         CPU_DISCARD(exit.text)                                          \
541         MEM_DISCARD(exit.text)
542
543 #define EXIT_CALL                                                       \
544         *(.exitcall.exit)
545
546 /*
547  * bss (Block Started by Symbol) - uninitialized data
548  * zeroed during startup
549  */
550 #define SBSS(sbss_align)                                                \
551         . = ALIGN(sbss_align);                                          \
552         .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) {                         \
553                 *(.sbss)                                                \
554                 *(.scommon)                                             \
555         }
556
557 /*
558  * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra
559  * sections to the front of bss.
560  */
561 #ifndef BSS_FIRST_SECTIONS
562 #define BSS_FIRST_SECTIONS
563 #endif
564
565 #define BSS(bss_align)                                                  \
566         . = ALIGN(bss_align);                                           \
567         .bss : AT(ADDR(.bss) - LOAD_OFFSET) {                           \
568                 BSS_FIRST_SECTIONS                                      \
569                 *(.bss..page_aligned)                                   \
570                 *(.dynbss)                                              \
571                 *(.bss)                                                 \
572                 *(COMMON)                                               \
573         }
574
575 /*
576  * DWARF debug sections.
577  * Symbols in the DWARF debugging sections are relative to
578  * the beginning of the section so we begin them at 0.
579  */
580 #define DWARF_DEBUG                                                     \
581                 /* DWARF 1 */                                           \
582                 .debug          0 : { *(.debug) }                       \
583                 .line           0 : { *(.line) }                        \
584                 /* GNU DWARF 1 extensions */                            \
585                 .debug_srcinfo  0 : { *(.debug_srcinfo) }               \
586                 .debug_sfnames  0 : { *(.debug_sfnames) }               \
587                 /* DWARF 1.1 and DWARF 2 */                             \
588                 .debug_aranges  0 : { *(.debug_aranges) }               \
589                 .debug_pubnames 0 : { *(.debug_pubnames) }              \
590                 /* DWARF 2 */                                           \
591                 .debug_info     0 : { *(.debug_info                     \
592                                 .gnu.linkonce.wi.*) }                   \
593                 .debug_abbrev   0 : { *(.debug_abbrev) }                \
594                 .debug_line     0 : { *(.debug_line) }                  \
595                 .debug_frame    0 : { *(.debug_frame) }                 \
596                 .debug_str      0 : { *(.debug_str) }                   \
597                 .debug_loc      0 : { *(.debug_loc) }                   \
598                 .debug_macinfo  0 : { *(.debug_macinfo) }               \
599                 /* SGI/MIPS DWARF 2 extensions */                       \
600                 .debug_weaknames 0 : { *(.debug_weaknames) }            \
601                 .debug_funcnames 0 : { *(.debug_funcnames) }            \
602                 .debug_typenames 0 : { *(.debug_typenames) }            \
603                 .debug_varnames  0 : { *(.debug_varnames) }             \
604
605                 /* Stabs debugging sections.  */
606 #define STABS_DEBUG                                                     \
607                 .stab 0 : { *(.stab) }                                  \
608                 .stabstr 0 : { *(.stabstr) }                            \
609                 .stab.excl 0 : { *(.stab.excl) }                        \
610                 .stab.exclstr 0 : { *(.stab.exclstr) }                  \
611                 .stab.index 0 : { *(.stab.index) }                      \
612                 .stab.indexstr 0 : { *(.stab.indexstr) }                \
613                 .comment 0 : { *(.comment) }
614
615 #ifdef CONFIG_GENERIC_BUG
616 #define BUG_TABLE                                                       \
617         . = ALIGN(8);                                                   \
618         __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) {             \
619                 VMLINUX_SYMBOL(__start___bug_table) = .;                \
620                 *(__bug_table)                                          \
621                 VMLINUX_SYMBOL(__stop___bug_table) = .;                 \
622         }
623 #else
624 #define BUG_TABLE
625 #endif
626
627 #ifdef CONFIG_PM_TRACE
628 #define TRACEDATA                                                       \
629         . = ALIGN(4);                                                   \
630         .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) {               \
631                 VMLINUX_SYMBOL(__tracedata_start) = .;                  \
632                 *(.tracedata)                                           \
633                 VMLINUX_SYMBOL(__tracedata_end) = .;                    \
634         }
635 #else
636 #define TRACEDATA
637 #endif
638
639 #define NOTES                                                           \
640         .notes : AT(ADDR(.notes) - LOAD_OFFSET) {                       \
641                 VMLINUX_SYMBOL(__start_notes) = .;                      \
642                 *(.note.*)                                              \
643                 VMLINUX_SYMBOL(__stop_notes) = .;                       \
644         }
645
646 #define INIT_SETUP(initsetup_align)                                     \
647                 . = ALIGN(initsetup_align);                             \
648                 VMLINUX_SYMBOL(__setup_start) = .;                      \
649                 *(.init.setup)                                          \
650                 VMLINUX_SYMBOL(__setup_end) = .;
651
652 #define INIT_CALLS_LEVEL(level)                                         \
653                 VMLINUX_SYMBOL(__initcall##level##_start) = .;          \
654                 *(.initcall##level##.init)                              \
655                 *(.initcall##level##s.init)                             \
656
657 #define INIT_CALLS                                                      \
658                 VMLINUX_SYMBOL(__initcall_start) = .;                   \
659                 *(.initcallearly.init)                                  \
660                 INIT_CALLS_LEVEL(0)                                     \
661                 INIT_CALLS_LEVEL(1)                                     \
662                 INIT_CALLS_LEVEL(2)                                     \
663                 INIT_CALLS_LEVEL(3)                                     \
664                 INIT_CALLS_LEVEL(4)                                     \
665                 INIT_CALLS_LEVEL(5)                                     \
666                 INIT_CALLS_LEVEL(rootfs)                                \
667                 INIT_CALLS_LEVEL(6)                                     \
668                 INIT_CALLS_LEVEL(7)                                     \
669                 VMLINUX_SYMBOL(__initcall_end) = .;
670
671 #define CON_INITCALL                                                    \
672                 VMLINUX_SYMBOL(__con_initcall_start) = .;               \
673                 *(.con_initcall.init)                                   \
674                 VMLINUX_SYMBOL(__con_initcall_end) = .;
675
676 #define SECURITY_INITCALL                                               \
677                 VMLINUX_SYMBOL(__security_initcall_start) = .;          \
678                 *(.security_initcall.init)                              \
679                 VMLINUX_SYMBOL(__security_initcall_end) = .;
680
681 #ifdef CONFIG_BLK_DEV_INITRD
682 #define INIT_RAM_FS                                                     \
683         . = ALIGN(4);                                                   \
684         VMLINUX_SYMBOL(__initramfs_start) = .;                          \
685         *(.init.ramfs)                                                  \
686         . = ALIGN(8);                                                   \
687         *(.init.ramfs.info)
688 #else
689 #define INIT_RAM_FS
690 #endif
691
692 /*
693  * Default discarded sections.
694  *
695  * Some archs want to discard exit text/data at runtime rather than
696  * link time due to cross-section references such as alt instructions,
697  * bug table, eh_frame, etc.  DISCARDS must be the last of output
698  * section definitions so that such archs put those in earlier section
699  * definitions.
700  */
701 #define DISCARDS                                                        \
702         /DISCARD/ : {                                                   \
703         EXIT_TEXT                                                       \
704         EXIT_DATA                                                       \
705         EXIT_CALL                                                       \
706         *(.discard)                                                     \
707         *(.discard.*)                                                   \
708         }
709
710 /**
711  * PERCPU_INPUT - the percpu input sections
712  * @cacheline: cacheline size
713  *
714  * The core percpu section names and core symbols which do not rely
715  * directly upon load addresses.
716  *
717  * @cacheline is used to align subsections to avoid false cacheline
718  * sharing between subsections for different purposes.
719  */
720 #define PERCPU_INPUT(cacheline)                                         \
721         VMLINUX_SYMBOL(__per_cpu_start) = .;                            \
722         *(.data..percpu..first)                                         \
723         . = ALIGN(PAGE_SIZE);                                           \
724         *(.data..percpu..page_aligned)                                  \
725         . = ALIGN(cacheline);                                           \
726         *(.data..percpu..readmostly)                                    \
727         . = ALIGN(cacheline);                                           \
728         *(.data..percpu)                                                \
729         *(.data..percpu..shared_aligned)                                \
730         VMLINUX_SYMBOL(__per_cpu_end) = .;
731
732 /**
733  * PERCPU_VADDR - define output section for percpu area
734  * @cacheline: cacheline size
735  * @vaddr: explicit base address (optional)
736  * @phdr: destination PHDR (optional)
737  *
738  * Macro which expands to output section for percpu area.
739  *
740  * @cacheline is used to align subsections to avoid false cacheline
741  * sharing between subsections for different purposes.
742  *
743  * If @vaddr is not blank, it specifies explicit base address and all
744  * percpu symbols will be offset from the given address.  If blank,
745  * @vaddr always equals @laddr + LOAD_OFFSET.
746  *
747  * @phdr defines the output PHDR to use if not blank.  Be warned that
748  * output PHDR is sticky.  If @phdr is specified, the next output
749  * section in the linker script will go there too.  @phdr should have
750  * a leading colon.
751  *
752  * Note that this macros defines __per_cpu_load as an absolute symbol.
753  * If there is no need to put the percpu section at a predetermined
754  * address, use PERCPU_SECTION.
755  */
756 #define PERCPU_VADDR(cacheline, vaddr, phdr)                            \
757         VMLINUX_SYMBOL(__per_cpu_load) = .;                             \
758         .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load)         \
759                                 - LOAD_OFFSET) {                        \
760                 PERCPU_INPUT(cacheline)                                 \
761         } phdr                                                          \
762         . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu);
763
764 /**
765  * PERCPU_SECTION - define output section for percpu area, simple version
766  * @cacheline: cacheline size
767  *
768  * Align to PAGE_SIZE and outputs output section for percpu area.  This
769  * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and
770  * __per_cpu_start will be identical.
771  *
772  * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,)
773  * except that __per_cpu_load is defined as a relative symbol against
774  * .data..percpu which is required for relocatable x86_32 configuration.
775  */
776 #define PERCPU_SECTION(cacheline)                                       \
777         . = ALIGN(PAGE_SIZE);                                           \
778         .data..percpu   : AT(ADDR(.data..percpu) - LOAD_OFFSET) {       \
779                 VMLINUX_SYMBOL(__per_cpu_load) = .;                     \
780                 PERCPU_INPUT(cacheline)                                 \
781         }
782
783
784 /*
785  * Definition of the high level *_SECTION macros
786  * They will fit only a subset of the architectures
787  */
788
789
790 /*
791  * Writeable data.
792  * All sections are combined in a single .data section.
793  * The sections following CONSTRUCTORS are arranged so their
794  * typical alignment matches.
795  * A cacheline is typical/always less than a PAGE_SIZE so
796  * the sections that has this restriction (or similar)
797  * is located before the ones requiring PAGE_SIZE alignment.
798  * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
799  * matches the requirement of PAGE_ALIGNED_DATA.
800  *
801  * use 0 as page_align if page_aligned data is not used */
802 #define RW_DATA_SECTION(cacheline, pagealigned, inittask)               \
803         . = ALIGN(PAGE_SIZE);                                           \
804         .data : AT(ADDR(.data) - LOAD_OFFSET) {                         \
805                 INIT_TASK_DATA(inittask)                                \
806                 NOSAVE_DATA                                             \
807                 PAGE_ALIGNED_DATA(pagealigned)                          \
808                 CACHELINE_ALIGNED_DATA(cacheline)                       \
809                 READ_MOSTLY_DATA(cacheline)                             \
810                 DATA_DATA                                               \
811                 CONSTRUCTORS                                            \
812         }
813
814 #define INIT_TEXT_SECTION(inittext_align)                               \
815         . = ALIGN(inittext_align);                                      \
816         .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {               \
817                 VMLINUX_SYMBOL(_sinittext) = .;                         \
818                 INIT_TEXT                                               \
819                 VMLINUX_SYMBOL(_einittext) = .;                         \
820         }
821
822 #define INIT_DATA_SECTION(initsetup_align)                              \
823         .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {               \
824                 INIT_DATA                                               \
825                 INIT_SETUP(initsetup_align)                             \
826                 INIT_CALLS                                              \
827                 CON_INITCALL                                            \
828                 SECURITY_INITCALL                                       \
829                 INIT_RAM_FS                                             \
830         }
831
832 #define BSS_SECTION(sbss_align, bss_align, stop_align)                  \
833         . = ALIGN(sbss_align);                                          \
834         VMLINUX_SYMBOL(__bss_start) = .;                                \
835         SBSS(sbss_align)                                                \
836         BSS(bss_align)                                                  \
837         . = ALIGN(stop_align);                                          \
838         VMLINUX_SYMBOL(__bss_stop) = .;