Merge tag 'v3.15' into p/abusse/merge_upgrade
[projects/modsched/linux.git] / include / asm-generic / vmlinux.lds.h
1 /*
2  * Helper macros to support writing architecture specific
3  * linker scripts.
4  *
5  * A minimal linker scripts has following content:
6  * [This is a sample, architectures may have special requiriements]
7  *
8  * OUTPUT_FORMAT(...)
9  * OUTPUT_ARCH(...)
10  * ENTRY(...)
11  * SECTIONS
12  * {
13  *      . = START;
14  *      __init_begin = .;
15  *      HEAD_TEXT_SECTION
16  *      INIT_TEXT_SECTION(PAGE_SIZE)
17  *      INIT_DATA_SECTION(...)
18  *      PERCPU_SECTION(CACHELINE_SIZE)
19  *      __init_end = .;
20  *
21  *      _stext = .;
22  *      TEXT_SECTION = 0
23  *      _etext = .;
24  *
25  *      _sdata = .;
26  *      RO_DATA_SECTION(PAGE_SIZE)
27  *      RW_DATA_SECTION(...)
28  *      _edata = .;
29  *
30  *      EXCEPTION_TABLE(...)
31  *      NOTES
32  *
33  *      BSS_SECTION(0, 0, 0)
34  *      _end = .;
35  *
36  *      STABS_DEBUG
37  *      DWARF_DEBUG
38  *
39  *      DISCARDS                // must be the last
40  * }
41  *
42  * [__init_begin, __init_end] is the init section that may be freed after init
43  * [_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_CPU
72 #define CPU_KEEP(sec)    *(.cpu##sec)
73 #define CPU_DISCARD(sec)
74 #else
75 #define CPU_KEEP(sec)
76 #define CPU_DISCARD(sec) *(.cpu##sec)
77 #endif
78
79 #if defined(CONFIG_MEMORY_HOTPLUG)
80 #define MEM_KEEP(sec)    *(.mem##sec)
81 #define MEM_DISCARD(sec)
82 #else
83 #define MEM_KEEP(sec)
84 #define MEM_DISCARD(sec) *(.mem##sec)
85 #endif
86
87 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
88 #define MCOUNT_REC()    . = ALIGN(8);                           \
89                         VMLINUX_SYMBOL(__start_mcount_loc) = .; \
90                         *(__mcount_loc)                         \
91                         VMLINUX_SYMBOL(__stop_mcount_loc) = .;
92 #else
93 #define MCOUNT_REC()
94 #endif
95
96 #ifdef CONFIG_TRACE_BRANCH_PROFILING
97 #define LIKELY_PROFILE()        VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \
98                                 *(_ftrace_annotated_branch)                           \
99                                 VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .;
100 #else
101 #define LIKELY_PROFILE()
102 #endif
103
104 #ifdef CONFIG_PROFILE_ALL_BRANCHES
105 #define BRANCH_PROFILE()        VMLINUX_SYMBOL(__start_branch_profile) = .;   \
106                                 *(_ftrace_branch)                             \
107                                 VMLINUX_SYMBOL(__stop_branch_profile) = .;
108 #else
109 #define BRANCH_PROFILE()
110 #endif
111
112 #ifdef CONFIG_EVENT_TRACING
113 #define FTRACE_EVENTS() . = ALIGN(8);                                   \
114                         VMLINUX_SYMBOL(__start_ftrace_events) = .;      \
115                         *(_ftrace_events)                               \
116                         VMLINUX_SYMBOL(__stop_ftrace_events) = .;
117 #else
118 #define FTRACE_EVENTS()
119 #endif
120
121 #ifdef CONFIG_TRACING
122 #define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .;      \
123                          *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \
124                          VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .;
125 #define TRACEPOINT_STR() VMLINUX_SYMBOL(__start___tracepoint_str) = .;  \
126                          *(__tracepoint_str) /* Trace_printk fmt' pointer */ \
127                          VMLINUX_SYMBOL(__stop___tracepoint_str) = .;
128 #else
129 #define TRACE_PRINTKS()
130 #define TRACEPOINT_STR()
131 #endif
132
133 #ifdef CONFIG_FTRACE_SYSCALLS
134 #define TRACE_SYSCALLS() . = ALIGN(8);                                  \
135                          VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \
136                          *(__syscalls_metadata)                         \
137                          VMLINUX_SYMBOL(__stop_syscalls_metadata) = .;
138 #else
139 #define TRACE_SYSCALLS()
140 #endif
141
142 #ifdef CONFIG_CLKSRC_OF
143 #define CLKSRC_OF_TABLES() . = ALIGN(8);                                \
144                            VMLINUX_SYMBOL(__clksrc_of_table) = .;       \
145                            *(__clksrc_of_table)                         \
146                            *(__clksrc_of_table_end)
147 #else
148 #define CLKSRC_OF_TABLES()
149 #endif
150
151 #ifdef CONFIG_IRQCHIP
152 #define IRQCHIP_OF_MATCH_TABLE()                                        \
153         . = ALIGN(8);                                                   \
154         VMLINUX_SYMBOL(__irqchip_begin) = .;                            \
155         *(__irqchip_of_table)                                           \
156         *(__irqchip_of_end)
157 #else
158 #define IRQCHIP_OF_MATCH_TABLE()
159 #endif
160
161 #ifdef CONFIG_COMMON_CLK
162 #define CLK_OF_TABLES() . = ALIGN(8);                           \
163                         VMLINUX_SYMBOL(__clk_of_table) = .;     \
164                         *(__clk_of_table)                       \
165                         *(__clk_of_table_end)
166 #else
167 #define CLK_OF_TABLES()
168 #endif
169
170 #ifdef CONFIG_OF_RESERVED_MEM
171 #define RESERVEDMEM_OF_TABLES()                         \
172         . = ALIGN(8);                                   \
173         VMLINUX_SYMBOL(__reservedmem_of_table) = .;     \
174         *(__reservedmem_of_table)                       \
175         *(__reservedmem_of_table_end)
176 #else
177 #define RESERVEDMEM_OF_TABLES()
178 #endif
179
180 #ifdef CONFIG_SMP
181 #define CPU_METHOD_OF_TABLES() . = ALIGN(8);                                \
182                            VMLINUX_SYMBOL(__cpu_method_of_table_begin) = .; \
183                            *(__cpu_method_of_table)                         \
184                            VMLINUX_SYMBOL(__cpu_method_of_table_end) = .;
185 #else
186 #define CPU_METHOD_OF_TABLES()
187 #endif
188
189 #define KERNEL_DTB()                                                    \
190         STRUCT_ALIGN();                                                 \
191         VMLINUX_SYMBOL(__dtb_start) = .;                                \
192         *(.dtb.init.rodata)                                             \
193         VMLINUX_SYMBOL(__dtb_end) = .;
194
195 /* .data section */
196 #define DATA_DATA                                                       \
197         *(.data)                                                        \
198         *(.ref.data)                                                    \
199         *(.data..shared_aligned) /* percpu related */                   \
200         MEM_KEEP(init.data)                                             \
201         MEM_KEEP(exit.data)                                             \
202         *(.data.unlikely)                                               \
203         STRUCT_ALIGN();                                                 \
204         *(__tracepoints)                                                \
205         /* implement dynamic printk debug */                            \
206         . = ALIGN(8);                                                   \
207         VMLINUX_SYMBOL(__start___jump_table) = .;                       \
208         *(__jump_table)                                                 \
209         VMLINUX_SYMBOL(__stop___jump_table) = .;                        \
210         . = ALIGN(8);                                                   \
211         VMLINUX_SYMBOL(__start___verbose) = .;                          \
212         *(__verbose)                                                    \
213         VMLINUX_SYMBOL(__stop___verbose) = .;                           \
214         LIKELY_PROFILE()                                                \
215         BRANCH_PROFILE()                                                \
216         TRACE_PRINTKS()                                                 \
217         TRACEPOINT_STR()
218
219 /*
220  * Data section helpers
221  */
222 #define NOSAVE_DATA                                                     \
223         . = ALIGN(PAGE_SIZE);                                           \
224         VMLINUX_SYMBOL(__nosave_begin) = .;                             \
225         *(.data..nosave)                                                \
226         . = ALIGN(PAGE_SIZE);                                           \
227         VMLINUX_SYMBOL(__nosave_end) = .;
228
229 #define PAGE_ALIGNED_DATA(page_align)                                   \
230         . = ALIGN(page_align);                                          \
231         *(.data..page_aligned)
232
233 #define READ_MOSTLY_DATA(align)                                         \
234         . = ALIGN(align);                                               \
235         *(.data..read_mostly)                                           \
236         . = ALIGN(align);
237
238 #define CACHELINE_ALIGNED_DATA(align)                                   \
239         . = ALIGN(align);                                               \
240         *(.data..cacheline_aligned)
241
242 #define INIT_TASK_DATA(align)                                           \
243         . = ALIGN(align);                                               \
244         *(.data..init_task)
245
246 /*
247  * Read only Data
248  */
249 #define RO_DATA_SECTION(align)                                          \
250         . = ALIGN((align));                                             \
251         .rodata           : AT(ADDR(.rodata) - LOAD_OFFSET) {           \
252                 VMLINUX_SYMBOL(__start_rodata) = .;                     \
253                 *(.rodata) *(.rodata.*)                                 \
254                 *(__vermagic)           /* Kernel version magic */      \
255                 . = ALIGN(8);                                           \
256                 VMLINUX_SYMBOL(__start___tracepoints_ptrs) = .;         \
257                 *(__tracepoints_ptrs)   /* Tracepoints: pointer array */\
258                 VMLINUX_SYMBOL(__stop___tracepoints_ptrs) = .;          \
259                 *(__tracepoints_strings)/* Tracepoints: strings */      \
260         }                                                               \
261                                                                         \
262         .rodata1          : AT(ADDR(.rodata1) - LOAD_OFFSET) {          \
263                 *(.rodata1)                                             \
264         }                                                               \
265                                                                         \
266         BUG_TABLE                                                       \
267                                                                         \
268         /* PCI quirks */                                                \
269         .pci_fixup        : AT(ADDR(.pci_fixup) - LOAD_OFFSET) {        \
270                 VMLINUX_SYMBOL(__start_pci_fixups_early) = .;           \
271                 *(.pci_fixup_early)                                     \
272                 VMLINUX_SYMBOL(__end_pci_fixups_early) = .;             \
273                 VMLINUX_SYMBOL(__start_pci_fixups_header) = .;          \
274                 *(.pci_fixup_header)                                    \
275                 VMLINUX_SYMBOL(__end_pci_fixups_header) = .;            \
276                 VMLINUX_SYMBOL(__start_pci_fixups_final) = .;           \
277                 *(.pci_fixup_final)                                     \
278                 VMLINUX_SYMBOL(__end_pci_fixups_final) = .;             \
279                 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .;          \
280                 *(.pci_fixup_enable)                                    \
281                 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .;            \
282                 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .;          \
283                 *(.pci_fixup_resume)                                    \
284                 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .;            \
285                 VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .;    \
286                 *(.pci_fixup_resume_early)                              \
287                 VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .;      \
288                 VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .;         \
289                 *(.pci_fixup_suspend)                                   \
290                 VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .;           \
291         }                                                               \
292                                                                         \
293         /* Built-in firmware blobs */                                   \
294         .builtin_fw        : AT(ADDR(.builtin_fw) - LOAD_OFFSET) {      \
295                 VMLINUX_SYMBOL(__start_builtin_fw) = .;                 \
296                 *(.builtin_fw)                                          \
297                 VMLINUX_SYMBOL(__end_builtin_fw) = .;                   \
298         }                                                               \
299                                                                         \
300         TRACEDATA                                                       \
301                                                                         \
302         /* Kernel symbol table: Normal symbols */                       \
303         __ksymtab         : AT(ADDR(__ksymtab) - LOAD_OFFSET) {         \
304                 VMLINUX_SYMBOL(__start___ksymtab) = .;                  \
305                 *(SORT(___ksymtab+*))                                   \
306                 VMLINUX_SYMBOL(__stop___ksymtab) = .;                   \
307         }                                                               \
308                                                                         \
309         /* Kernel symbol table: GPL-only symbols */                     \
310         __ksymtab_gpl     : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) {     \
311                 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .;              \
312                 *(SORT(___ksymtab_gpl+*))                               \
313                 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .;               \
314         }                                                               \
315                                                                         \
316         /* Kernel symbol table: Normal unused symbols */                \
317         __ksymtab_unused  : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) {  \
318                 VMLINUX_SYMBOL(__start___ksymtab_unused) = .;           \
319                 *(SORT(___ksymtab_unused+*))                            \
320                 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .;            \
321         }                                                               \
322                                                                         \
323         /* Kernel symbol table: GPL-only unused symbols */              \
324         __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
325                 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .;       \
326                 *(SORT(___ksymtab_unused_gpl+*))                        \
327                 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .;        \
328         }                                                               \
329                                                                         \
330         /* Kernel symbol table: GPL-future-only symbols */              \
331         __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
332                 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .;       \
333                 *(SORT(___ksymtab_gpl_future+*))                        \
334                 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .;        \
335         }                                                               \
336                                                                         \
337         /* Kernel symbol table: Normal symbols */                       \
338         __kcrctab         : AT(ADDR(__kcrctab) - LOAD_OFFSET) {         \
339                 VMLINUX_SYMBOL(__start___kcrctab) = .;                  \
340                 *(SORT(___kcrctab+*))                                   \
341                 VMLINUX_SYMBOL(__stop___kcrctab) = .;                   \
342         }                                                               \
343                                                                         \
344         /* Kernel symbol table: GPL-only symbols */                     \
345         __kcrctab_gpl     : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) {     \
346                 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .;              \
347                 *(SORT(___kcrctab_gpl+*))                               \
348                 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .;               \
349         }                                                               \
350                                                                         \
351         /* Kernel symbol table: Normal unused symbols */                \
352         __kcrctab_unused  : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) {  \
353                 VMLINUX_SYMBOL(__start___kcrctab_unused) = .;           \
354                 *(SORT(___kcrctab_unused+*))                            \
355                 VMLINUX_SYMBOL(__stop___kcrctab_unused) = .;            \
356         }                                                               \
357                                                                         \
358         /* Kernel symbol table: GPL-only unused symbols */              \
359         __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
360                 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .;       \
361                 *(SORT(___kcrctab_unused_gpl+*))                        \
362                 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .;        \
363         }                                                               \
364                                                                         \
365         /* Kernel symbol table: GPL-future-only symbols */              \
366         __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
367                 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .;       \
368                 *(SORT(___kcrctab_gpl_future+*))                        \
369                 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .;        \
370         }                                                               \
371                                                                         \
372         /* Kernel symbol table: strings */                              \
373         __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
374                 *(__ksymtab_strings)                                    \
375         }                                                               \
376                                                                         \
377         /* __*init sections */                                          \
378         __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) {         \
379                 *(.ref.rodata)                                          \
380                 MEM_KEEP(init.rodata)                                   \
381                 MEM_KEEP(exit.rodata)                                   \
382         }                                                               \
383                                                                         \
384         /* Built-in module parameters. */                               \
385         __param : AT(ADDR(__param) - LOAD_OFFSET) {                     \
386                 VMLINUX_SYMBOL(__start___param) = .;                    \
387                 *(__param)                                              \
388                 VMLINUX_SYMBOL(__stop___param) = .;                     \
389         }                                                               \
390                                                                         \
391         /* Built-in module versions. */                                 \
392         __modver : AT(ADDR(__modver) - LOAD_OFFSET) {                   \
393                 VMLINUX_SYMBOL(__start___modver) = .;                   \
394                 *(__modver)                                             \
395                 VMLINUX_SYMBOL(__stop___modver) = .;                    \
396                 . = ALIGN((align));                                     \
397                 VMLINUX_SYMBOL(__end_rodata) = .;                       \
398         }                                                               \
399         . = ALIGN((align));
400
401 /* RODATA & RO_DATA provided for backward compatibility.
402  * All archs are supposed to use RO_DATA() */
403 #define RODATA          RO_DATA_SECTION(4096)
404 #define RO_DATA(align)  RO_DATA_SECTION(align)
405
406 #define SECURITY_INIT                                                   \
407         .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
408                 VMLINUX_SYMBOL(__security_initcall_start) = .;          \
409                 *(.security_initcall.init)                              \
410                 VMLINUX_SYMBOL(__security_initcall_end) = .;            \
411         }
412
413 /* .text section. Map to function alignment to avoid address changes
414  * during second ld run in second ld pass when generating System.map */
415 #define TEXT_TEXT                                                       \
416                 ALIGN_FUNCTION();                                       \
417                 *(.text.hot)                                            \
418                 *(.text)                                                \
419                 *(.ref.text)                                            \
420         MEM_KEEP(init.text)                                             \
421         MEM_KEEP(exit.text)                                             \
422                 *(.text.unlikely)
423
424
425 /* sched.text is aling to function alignment to secure we have same
426  * address even at second ld pass when generating System.map */
427 #define SCHED_TEXT                                                      \
428                 ALIGN_FUNCTION();                                       \
429                 VMLINUX_SYMBOL(__sched_text_start) = .;                 \
430                 *(.sched.text)                                          \
431                 VMLINUX_SYMBOL(__sched_text_end) = .;
432
433 /* spinlock.text is aling to function alignment to secure we have same
434  * address even at second ld pass when generating System.map */
435 #define LOCK_TEXT                                                       \
436                 ALIGN_FUNCTION();                                       \
437                 VMLINUX_SYMBOL(__lock_text_start) = .;                  \
438                 *(.spinlock.text)                                       \
439                 VMLINUX_SYMBOL(__lock_text_end) = .;
440
441 #define KPROBES_TEXT                                                    \
442                 ALIGN_FUNCTION();                                       \
443                 VMLINUX_SYMBOL(__kprobes_text_start) = .;               \
444                 *(.kprobes.text)                                        \
445                 VMLINUX_SYMBOL(__kprobes_text_end) = .;
446
447 #define ENTRY_TEXT                                                      \
448                 ALIGN_FUNCTION();                                       \
449                 VMLINUX_SYMBOL(__entry_text_start) = .;                 \
450                 *(.entry.text)                                          \
451                 VMLINUX_SYMBOL(__entry_text_end) = .;
452
453 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
454 #define IRQENTRY_TEXT                                                   \
455                 ALIGN_FUNCTION();                                       \
456                 VMLINUX_SYMBOL(__irqentry_text_start) = .;              \
457                 *(.irqentry.text)                                       \
458                 VMLINUX_SYMBOL(__irqentry_text_end) = .;
459 #else
460 #define IRQENTRY_TEXT
461 #endif
462
463 /* Section used for early init (in .S files) */
464 #define HEAD_TEXT  *(.head.text)
465
466 #define HEAD_TEXT_SECTION                                                       \
467         .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) {               \
468                 HEAD_TEXT                                               \
469         }
470
471 /*
472  * Exception table
473  */
474 #define EXCEPTION_TABLE(align)                                          \
475         . = ALIGN(align);                                               \
476         __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {               \
477                 VMLINUX_SYMBOL(__start___ex_table) = .;                 \
478                 *(__ex_table)                                           \
479                 VMLINUX_SYMBOL(__stop___ex_table) = .;                  \
480         }
481
482 /*
483  * Init task
484  */
485 #define INIT_TASK_DATA_SECTION(align)                                   \
486         . = ALIGN(align);                                               \
487         .data..init_task :  AT(ADDR(.data..init_task) - LOAD_OFFSET) {  \
488                 INIT_TASK_DATA(align)                                   \
489         }
490
491 #ifdef CONFIG_CONSTRUCTORS
492 #define KERNEL_CTORS()  . = ALIGN(8);                      \
493                         VMLINUX_SYMBOL(__ctors_start) = .; \
494                         *(.ctors)                          \
495                         *(.init_array)                     \
496                         VMLINUX_SYMBOL(__ctors_end) = .;
497 #else
498 #define KERNEL_CTORS()
499 #endif
500
501 /* init and exit section handling */
502 #define INIT_DATA                                                       \
503         *(.init.data)                                                   \
504         MEM_DISCARD(init.data)                                          \
505         KERNEL_CTORS()                                                  \
506         MCOUNT_REC()                                                    \
507         *(.init.rodata)                                                 \
508         FTRACE_EVENTS()                                                 \
509         TRACE_SYSCALLS()                                                \
510         MEM_DISCARD(init.rodata)                                        \
511         CLK_OF_TABLES()                                                 \
512         RESERVEDMEM_OF_TABLES()                                         \
513         CLKSRC_OF_TABLES()                                              \
514         CPU_METHOD_OF_TABLES()                                          \
515         KERNEL_DTB()                                                    \
516         IRQCHIP_OF_MATCH_TABLE()
517
518 #define INIT_TEXT                                                       \
519         *(.init.text)                                                   \
520         MEM_DISCARD(init.text)
521
522 #define EXIT_DATA                                                       \
523         *(.exit.data)                                                   \
524         MEM_DISCARD(exit.data)                                          \
525         MEM_DISCARD(exit.rodata)
526
527 #define EXIT_TEXT                                                       \
528         *(.exit.text)                                                   \
529         MEM_DISCARD(exit.text)
530
531 #define EXIT_CALL                                                       \
532         *(.exitcall.exit)
533
534 /*
535  * bss (Block Started by Symbol) - uninitialized data
536  * zeroed during startup
537  */
538 #define SBSS(sbss_align)                                                \
539         . = ALIGN(sbss_align);                                          \
540         .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) {                         \
541                 *(.sbss)                                                \
542                 *(.scommon)                                             \
543         }
544
545 /*
546  * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra
547  * sections to the front of bss.
548  */
549 #ifndef BSS_FIRST_SECTIONS
550 #define BSS_FIRST_SECTIONS
551 #endif
552
553 #define BSS(bss_align)                                                  \
554         . = ALIGN(bss_align);                                           \
555         .bss : AT(ADDR(.bss) - LOAD_OFFSET) {                           \
556                 BSS_FIRST_SECTIONS                                      \
557                 *(.bss..page_aligned)                                   \
558                 *(.dynbss)                                              \
559                 *(.bss)                                                 \
560                 *(COMMON)                                               \
561         }
562
563 /*
564  * DWARF debug sections.
565  * Symbols in the DWARF debugging sections are relative to
566  * the beginning of the section so we begin them at 0.
567  */
568 #define DWARF_DEBUG                                                     \
569                 /* DWARF 1 */                                           \
570                 .debug          0 : { *(.debug) }                       \
571                 .line           0 : { *(.line) }                        \
572                 /* GNU DWARF 1 extensions */                            \
573                 .debug_srcinfo  0 : { *(.debug_srcinfo) }               \
574                 .debug_sfnames  0 : { *(.debug_sfnames) }               \
575                 /* DWARF 1.1 and DWARF 2 */                             \
576                 .debug_aranges  0 : { *(.debug_aranges) }               \
577                 .debug_pubnames 0 : { *(.debug_pubnames) }              \
578                 /* DWARF 2 */                                           \
579                 .debug_info     0 : { *(.debug_info                     \
580                                 .gnu.linkonce.wi.*) }                   \
581                 .debug_abbrev   0 : { *(.debug_abbrev) }                \
582                 .debug_line     0 : { *(.debug_line) }                  \
583                 .debug_frame    0 : { *(.debug_frame) }                 \
584                 .debug_str      0 : { *(.debug_str) }                   \
585                 .debug_loc      0 : { *(.debug_loc) }                   \
586                 .debug_macinfo  0 : { *(.debug_macinfo) }               \
587                 /* SGI/MIPS DWARF 2 extensions */                       \
588                 .debug_weaknames 0 : { *(.debug_weaknames) }            \
589                 .debug_funcnames 0 : { *(.debug_funcnames) }            \
590                 .debug_typenames 0 : { *(.debug_typenames) }            \
591                 .debug_varnames  0 : { *(.debug_varnames) }             \
592
593                 /* Stabs debugging sections.  */
594 #define STABS_DEBUG                                                     \
595                 .stab 0 : { *(.stab) }                                  \
596                 .stabstr 0 : { *(.stabstr) }                            \
597                 .stab.excl 0 : { *(.stab.excl) }                        \
598                 .stab.exclstr 0 : { *(.stab.exclstr) }                  \
599                 .stab.index 0 : { *(.stab.index) }                      \
600                 .stab.indexstr 0 : { *(.stab.indexstr) }                \
601                 .comment 0 : { *(.comment) }
602
603 #ifdef CONFIG_GENERIC_BUG
604 #define BUG_TABLE                                                       \
605         . = ALIGN(8);                                                   \
606         __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) {             \
607                 VMLINUX_SYMBOL(__start___bug_table) = .;                \
608                 *(__bug_table)                                          \
609                 VMLINUX_SYMBOL(__stop___bug_table) = .;                 \
610         }
611 #else
612 #define BUG_TABLE
613 #endif
614
615 #ifdef CONFIG_PM_TRACE
616 #define TRACEDATA                                                       \
617         . = ALIGN(4);                                                   \
618         .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) {               \
619                 VMLINUX_SYMBOL(__tracedata_start) = .;                  \
620                 *(.tracedata)                                           \
621                 VMLINUX_SYMBOL(__tracedata_end) = .;                    \
622         }
623 #else
624 #define TRACEDATA
625 #endif
626
627 #define NOTES                                                           \
628         .notes : AT(ADDR(.notes) - LOAD_OFFSET) {                       \
629                 VMLINUX_SYMBOL(__start_notes) = .;                      \
630                 *(.note.*)                                              \
631                 VMLINUX_SYMBOL(__stop_notes) = .;                       \
632         }
633
634 #define INIT_SETUP(initsetup_align)                                     \
635                 . = ALIGN(initsetup_align);                             \
636                 VMLINUX_SYMBOL(__setup_start) = .;                      \
637                 *(.init.setup)                                          \
638                 VMLINUX_SYMBOL(__setup_end) = .;
639
640 #define INIT_CALLS_LEVEL(level)                                         \
641                 VMLINUX_SYMBOL(__initcall##level##_start) = .;          \
642                 *(.initcall##level##.init)                              \
643                 *(.initcall##level##s.init)                             \
644
645 #define INIT_CALLS                                                      \
646                 VMLINUX_SYMBOL(__initcall_start) = .;                   \
647                 *(.initcallearly.init)                                  \
648                 INIT_CALLS_LEVEL(0)                                     \
649                 INIT_CALLS_LEVEL(1)                                     \
650                 INIT_CALLS_LEVEL(2)                                     \
651                 INIT_CALLS_LEVEL(3)                                     \
652                 INIT_CALLS_LEVEL(4)                                     \
653                 INIT_CALLS_LEVEL(5)                                     \
654                 INIT_CALLS_LEVEL(rootfs)                                \
655                 INIT_CALLS_LEVEL(6)                                     \
656                 INIT_CALLS_LEVEL(7)                                     \
657                 VMLINUX_SYMBOL(__initcall_end) = .;
658
659 #define CON_INITCALL                                                    \
660                 VMLINUX_SYMBOL(__con_initcall_start) = .;               \
661                 *(.con_initcall.init)                                   \
662                 VMLINUX_SYMBOL(__con_initcall_end) = .;
663
664 #define SECURITY_INITCALL                                               \
665                 VMLINUX_SYMBOL(__security_initcall_start) = .;          \
666                 *(.security_initcall.init)                              \
667                 VMLINUX_SYMBOL(__security_initcall_end) = .;
668
669 #ifdef CONFIG_MOD_SCHED
670 #define COBAS_INITCALL                                                  \
671                 VMLINUX_SYMBOL(__fw_modules_init_start) = .;            \
672                 *(.fw.modules.init)                                     \
673                 VMLINUX_SYMBOL(__fw_modules_init_end) = .;
674 #else
675 #define COBAS_INITCALL
676 #endif
677
678 #ifdef CONFIG_BLK_DEV_INITRD
679 #define INIT_RAM_FS                                                     \
680         . = ALIGN(4);                                                   \
681         VMLINUX_SYMBOL(__initramfs_start) = .;                          \
682         *(.init.ramfs)                                                  \
683         . = ALIGN(8);                                                   \
684         *(.init.ramfs.info)
685 #else
686 #define INIT_RAM_FS
687 #endif
688
689 /*
690  * Default discarded sections.
691  *
692  * Some archs want to discard exit text/data at runtime rather than
693  * link time due to cross-section references such as alt instructions,
694  * bug table, eh_frame, etc.  DISCARDS must be the last of output
695  * section definitions so that such archs put those in earlier section
696  * definitions.
697  */
698 #define DISCARDS                                                        \
699         /DISCARD/ : {                                                   \
700         EXIT_TEXT                                                       \
701         EXIT_DATA                                                       \
702         EXIT_CALL                                                       \
703         *(.discard)                                                     \
704         *(.discard.*)                                                   \
705         }
706
707 /**
708  * PERCPU_INPUT - the percpu input sections
709  * @cacheline: cacheline size
710  *
711  * The core percpu section names and core symbols which do not rely
712  * directly upon load addresses.
713  *
714  * @cacheline is used to align subsections to avoid false cacheline
715  * sharing between subsections for different purposes.
716  */
717 #define PERCPU_INPUT(cacheline)                                         \
718         VMLINUX_SYMBOL(__per_cpu_start) = .;                            \
719         *(.data..percpu..first)                                         \
720         . = ALIGN(PAGE_SIZE);                                           \
721         *(.data..percpu..page_aligned)                                  \
722         . = ALIGN(cacheline);                                           \
723         *(.data..percpu..readmostly)                                    \
724         . = ALIGN(cacheline);                                           \
725         *(.data..percpu)                                                \
726         *(.data..percpu..shared_aligned)                                \
727         VMLINUX_SYMBOL(__per_cpu_end) = .;
728
729 /**
730  * PERCPU_VADDR - define output section for percpu area
731  * @cacheline: cacheline size
732  * @vaddr: explicit base address (optional)
733  * @phdr: destination PHDR (optional)
734  *
735  * Macro which expands to output section for percpu area.
736  *
737  * @cacheline is used to align subsections to avoid false cacheline
738  * sharing between subsections for different purposes.
739  *
740  * If @vaddr is not blank, it specifies explicit base address and all
741  * percpu symbols will be offset from the given address.  If blank,
742  * @vaddr always equals @laddr + LOAD_OFFSET.
743  *
744  * @phdr defines the output PHDR to use if not blank.  Be warned that
745  * output PHDR is sticky.  If @phdr is specified, the next output
746  * section in the linker script will go there too.  @phdr should have
747  * a leading colon.
748  *
749  * Note that this macros defines __per_cpu_load as an absolute symbol.
750  * If there is no need to put the percpu section at a predetermined
751  * address, use PERCPU_SECTION.
752  */
753 #define PERCPU_VADDR(cacheline, vaddr, phdr)                            \
754         VMLINUX_SYMBOL(__per_cpu_load) = .;                             \
755         .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load)         \
756                                 - LOAD_OFFSET) {                        \
757                 PERCPU_INPUT(cacheline)                                 \
758         } phdr                                                          \
759         . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu);
760
761 /**
762  * PERCPU_SECTION - define output section for percpu area, simple version
763  * @cacheline: cacheline size
764  *
765  * Align to PAGE_SIZE and outputs output section for percpu area.  This
766  * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and
767  * __per_cpu_start will be identical.
768  *
769  * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,)
770  * except that __per_cpu_load is defined as a relative symbol against
771  * .data..percpu which is required for relocatable x86_32 configuration.
772  */
773 #define PERCPU_SECTION(cacheline)                                       \
774         . = ALIGN(PAGE_SIZE);                                           \
775         .data..percpu   : AT(ADDR(.data..percpu) - LOAD_OFFSET) {       \
776                 VMLINUX_SYMBOL(__per_cpu_load) = .;                     \
777                 PERCPU_INPUT(cacheline)                                 \
778         }
779
780
781 /*
782  * Definition of the high level *_SECTION macros
783  * They will fit only a subset of the architectures
784  */
785
786
787 /*
788  * Writeable data.
789  * All sections are combined in a single .data section.
790  * The sections following CONSTRUCTORS are arranged so their
791  * typical alignment matches.
792  * A cacheline is typical/always less than a PAGE_SIZE so
793  * the sections that has this restriction (or similar)
794  * is located before the ones requiring PAGE_SIZE alignment.
795  * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
796  * matches the requirement of PAGE_ALIGNED_DATA.
797  *
798  * use 0 as page_align if page_aligned data is not used */
799 #define RW_DATA_SECTION(cacheline, pagealigned, inittask)               \
800         . = ALIGN(PAGE_SIZE);                                           \
801         .data : AT(ADDR(.data) - LOAD_OFFSET) {                         \
802                 INIT_TASK_DATA(inittask)                                \
803                 NOSAVE_DATA                                             \
804                 PAGE_ALIGNED_DATA(pagealigned)                          \
805                 CACHELINE_ALIGNED_DATA(cacheline)                       \
806                 READ_MOSTLY_DATA(cacheline)                             \
807                 DATA_DATA                                               \
808                 CONSTRUCTORS                                            \
809         }
810
811 #define INIT_TEXT_SECTION(inittext_align)                               \
812         . = ALIGN(inittext_align);                                      \
813         .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {               \
814                 VMLINUX_SYMBOL(_sinittext) = .;                         \
815                 INIT_TEXT                                               \
816                 VMLINUX_SYMBOL(_einittext) = .;                         \
817         }
818
819 #define INIT_DATA_SECTION(initsetup_align)                              \
820         .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {               \
821                 INIT_DATA                                               \
822                 INIT_SETUP(initsetup_align)                             \
823                 INIT_CALLS                                              \
824                 CON_INITCALL                                            \
825                 SECURITY_INITCALL                                       \
826                 COBAS_INITCALL                                  \
827                 INIT_RAM_FS                                             \
828         }
829
830 #define BSS_SECTION(sbss_align, bss_align, stop_align)                  \
831         . = ALIGN(sbss_align);                                          \
832         VMLINUX_SYMBOL(__bss_start) = .;                                \
833         SBSS(sbss_align)                                                \
834         BSS(bss_align)                                                  \
835         . = ALIGN(stop_align);                                          \
836         VMLINUX_SYMBOL(__bss_stop) = .;