Linux 4.1
[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  *      // __init_begin and __init_end should be page aligned, so that we can
44  *      // free the whole .init memory
45  * [_stext, _etext] is the text section
46  * [_sdata, _edata] is the data section
47  *
48  * Some of the included output section have their own set of constants.
49  * Examples are: [__initramfs_start, __initramfs_end] for initramfs and
50  *               [__nosave_begin, __nosave_end] for the nosave data
51  */
52
53 #ifndef LOAD_OFFSET
54 #define LOAD_OFFSET 0
55 #endif
56
57 #include <linux/export.h>
58
59 /* Align . to a 8 byte boundary equals to maximum function alignment. */
60 #define ALIGN_FUNCTION()  . = ALIGN(8)
61
62 /*
63  * Align to a 32 byte boundary equal to the
64  * alignment gcc 4.5 uses for a struct
65  */
66 #define STRUCT_ALIGNMENT 32
67 #define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT)
68
69 /* The actual configuration determine if the init/exit sections
70  * are handled as text/data or they can be discarded (which
71  * often happens at runtime)
72  */
73 #ifdef CONFIG_HOTPLUG_CPU
74 #define CPU_KEEP(sec)    *(.cpu##sec)
75 #define CPU_DISCARD(sec)
76 #else
77 #define CPU_KEEP(sec)
78 #define CPU_DISCARD(sec) *(.cpu##sec)
79 #endif
80
81 #if defined(CONFIG_MEMORY_HOTPLUG)
82 #define MEM_KEEP(sec)    *(.mem##sec)
83 #define MEM_DISCARD(sec)
84 #else
85 #define MEM_KEEP(sec)
86 #define MEM_DISCARD(sec) *(.mem##sec)
87 #endif
88
89 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
90 #define MCOUNT_REC()    . = ALIGN(8);                           \
91                         VMLINUX_SYMBOL(__start_mcount_loc) = .; \
92                         *(__mcount_loc)                         \
93                         VMLINUX_SYMBOL(__stop_mcount_loc) = .;
94 #else
95 #define MCOUNT_REC()
96 #endif
97
98 #ifdef CONFIG_TRACE_BRANCH_PROFILING
99 #define LIKELY_PROFILE()        VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \
100                                 *(_ftrace_annotated_branch)                           \
101                                 VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .;
102 #else
103 #define LIKELY_PROFILE()
104 #endif
105
106 #ifdef CONFIG_PROFILE_ALL_BRANCHES
107 #define BRANCH_PROFILE()        VMLINUX_SYMBOL(__start_branch_profile) = .;   \
108                                 *(_ftrace_branch)                             \
109                                 VMLINUX_SYMBOL(__stop_branch_profile) = .;
110 #else
111 #define BRANCH_PROFILE()
112 #endif
113
114 #ifdef CONFIG_KPROBES
115 #define KPROBE_BLACKLIST()      . = ALIGN(8);                                 \
116                                 VMLINUX_SYMBOL(__start_kprobe_blacklist) = .; \
117                                 *(_kprobe_blacklist)                          \
118                                 VMLINUX_SYMBOL(__stop_kprobe_blacklist) = .;
119 #else
120 #define KPROBE_BLACKLIST()
121 #endif
122
123 #ifdef CONFIG_EVENT_TRACING
124 #define FTRACE_EVENTS() . = ALIGN(8);                                   \
125                         VMLINUX_SYMBOL(__start_ftrace_events) = .;      \
126                         *(_ftrace_events)                               \
127                         VMLINUX_SYMBOL(__stop_ftrace_events) = .;       \
128                         VMLINUX_SYMBOL(__start_ftrace_enum_maps) = .;   \
129                         *(_ftrace_enum_map)                             \
130                         VMLINUX_SYMBOL(__stop_ftrace_enum_maps) = .;
131 #else
132 #define FTRACE_EVENTS()
133 #endif
134
135 #ifdef CONFIG_TRACING
136 #define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .;      \
137                          *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \
138                          VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .;
139 #define TRACEPOINT_STR() VMLINUX_SYMBOL(__start___tracepoint_str) = .;  \
140                          *(__tracepoint_str) /* Trace_printk fmt' pointer */ \
141                          VMLINUX_SYMBOL(__stop___tracepoint_str) = .;
142 #else
143 #define TRACE_PRINTKS()
144 #define TRACEPOINT_STR()
145 #endif
146
147 #ifdef CONFIG_FTRACE_SYSCALLS
148 #define TRACE_SYSCALLS() . = ALIGN(8);                                  \
149                          VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \
150                          *(__syscalls_metadata)                         \
151                          VMLINUX_SYMBOL(__stop_syscalls_metadata) = .;
152 #else
153 #define TRACE_SYSCALLS()
154 #endif
155
156 #ifdef CONFIG_SERIAL_EARLYCON
157 #define EARLYCON_TABLE() STRUCT_ALIGN();                        \
158                          VMLINUX_SYMBOL(__earlycon_table) = .;  \
159                          *(__earlycon_table)                    \
160                          *(__earlycon_table_end)
161 #else
162 #define EARLYCON_TABLE()
163 #endif
164
165 #define ___OF_TABLE(cfg, name)  _OF_TABLE_##cfg(name)
166 #define __OF_TABLE(cfg, name)   ___OF_TABLE(cfg, name)
167 #define OF_TABLE(cfg, name)     __OF_TABLE(config_enabled(cfg), name)
168 #define _OF_TABLE_0(name)
169 #define _OF_TABLE_1(name)                                               \
170         . = ALIGN(8);                                                   \
171         VMLINUX_SYMBOL(__##name##_of_table) = .;                        \
172         *(__##name##_of_table)                                          \
173         *(__##name##_of_table_end)
174
175 #define CLKSRC_OF_TABLES()      OF_TABLE(CONFIG_CLKSRC_OF, clksrc)
176 #define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip)
177 #define CLK_OF_TABLES()         OF_TABLE(CONFIG_COMMON_CLK, clk)
178 #define IOMMU_OF_TABLES()       OF_TABLE(CONFIG_OF_IOMMU, iommu)
179 #define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem)
180 #define CPU_METHOD_OF_TABLES()  OF_TABLE(CONFIG_SMP, cpu_method)
181 #define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method)
182 #define EARLYCON_OF_TABLES()    OF_TABLE(CONFIG_SERIAL_EARLYCON, earlycon)
183
184 #define KERNEL_DTB()                                                    \
185         STRUCT_ALIGN();                                                 \
186         VMLINUX_SYMBOL(__dtb_start) = .;                                \
187         *(.dtb.init.rodata)                                             \
188         VMLINUX_SYMBOL(__dtb_end) = .;
189
190 /* .data section */
191 #define DATA_DATA                                                       \
192         *(.data)                                                        \
193         *(.ref.data)                                                    \
194         *(.data..shared_aligned) /* percpu related */                   \
195         MEM_KEEP(init.data)                                             \
196         MEM_KEEP(exit.data)                                             \
197         *(.data.unlikely)                                               \
198         STRUCT_ALIGN();                                                 \
199         *(__tracepoints)                                                \
200         /* implement dynamic printk debug */                            \
201         . = ALIGN(8);                                                   \
202         VMLINUX_SYMBOL(__start___jump_table) = .;                       \
203         *(__jump_table)                                                 \
204         VMLINUX_SYMBOL(__stop___jump_table) = .;                        \
205         . = ALIGN(8);                                                   \
206         VMLINUX_SYMBOL(__start___verbose) = .;                          \
207         *(__verbose)                                                    \
208         VMLINUX_SYMBOL(__stop___verbose) = .;                           \
209         LIKELY_PROFILE()                                                \
210         BRANCH_PROFILE()                                                \
211         TRACE_PRINTKS()                                                 \
212         TRACEPOINT_STR()
213
214 /*
215  * Data section helpers
216  */
217 #define NOSAVE_DATA                                                     \
218         . = ALIGN(PAGE_SIZE);                                           \
219         VMLINUX_SYMBOL(__nosave_begin) = .;                             \
220         *(.data..nosave)                                                \
221         . = ALIGN(PAGE_SIZE);                                           \
222         VMLINUX_SYMBOL(__nosave_end) = .;
223
224 #define PAGE_ALIGNED_DATA(page_align)                                   \
225         . = ALIGN(page_align);                                          \
226         *(.data..page_aligned)
227
228 #define READ_MOSTLY_DATA(align)                                         \
229         . = ALIGN(align);                                               \
230         *(.data..read_mostly)                                           \
231         . = ALIGN(align);
232
233 #define CACHELINE_ALIGNED_DATA(align)                                   \
234         . = ALIGN(align);                                               \
235         *(.data..cacheline_aligned)
236
237 #define INIT_TASK_DATA(align)                                           \
238         . = ALIGN(align);                                               \
239         *(.data..init_task)
240
241 /*
242  * Read only Data
243  */
244 #define RO_DATA_SECTION(align)                                          \
245         . = ALIGN((align));                                             \
246         .rodata           : AT(ADDR(.rodata) - LOAD_OFFSET) {           \
247                 VMLINUX_SYMBOL(__start_rodata) = .;                     \
248                 *(.rodata) *(.rodata.*)                                 \
249                 *(__vermagic)           /* Kernel version magic */      \
250                 . = ALIGN(8);                                           \
251                 VMLINUX_SYMBOL(__start___tracepoints_ptrs) = .;         \
252                 *(__tracepoints_ptrs)   /* Tracepoints: pointer array */\
253                 VMLINUX_SYMBOL(__stop___tracepoints_ptrs) = .;          \
254                 *(__tracepoints_strings)/* Tracepoints: strings */      \
255         }                                                               \
256                                                                         \
257         .rodata1          : AT(ADDR(.rodata1) - LOAD_OFFSET) {          \
258                 *(.rodata1)                                             \
259         }                                                               \
260                                                                         \
261         BUG_TABLE                                                       \
262                                                                         \
263         /* PCI quirks */                                                \
264         .pci_fixup        : AT(ADDR(.pci_fixup) - LOAD_OFFSET) {        \
265                 VMLINUX_SYMBOL(__start_pci_fixups_early) = .;           \
266                 *(.pci_fixup_early)                                     \
267                 VMLINUX_SYMBOL(__end_pci_fixups_early) = .;             \
268                 VMLINUX_SYMBOL(__start_pci_fixups_header) = .;          \
269                 *(.pci_fixup_header)                                    \
270                 VMLINUX_SYMBOL(__end_pci_fixups_header) = .;            \
271                 VMLINUX_SYMBOL(__start_pci_fixups_final) = .;           \
272                 *(.pci_fixup_final)                                     \
273                 VMLINUX_SYMBOL(__end_pci_fixups_final) = .;             \
274                 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .;          \
275                 *(.pci_fixup_enable)                                    \
276                 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .;            \
277                 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .;          \
278                 *(.pci_fixup_resume)                                    \
279                 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .;            \
280                 VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .;    \
281                 *(.pci_fixup_resume_early)                              \
282                 VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .;      \
283                 VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .;         \
284                 *(.pci_fixup_suspend)                                   \
285                 VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .;           \
286                 VMLINUX_SYMBOL(__start_pci_fixups_suspend_late) = .;    \
287                 *(.pci_fixup_suspend_late)                              \
288                 VMLINUX_SYMBOL(__end_pci_fixups_suspend_late) = .;      \
289         }                                                               \
290                                                                         \
291         /* Built-in firmware blobs */                                   \
292         .builtin_fw        : AT(ADDR(.builtin_fw) - LOAD_OFFSET) {      \
293                 VMLINUX_SYMBOL(__start_builtin_fw) = .;                 \
294                 *(.builtin_fw)                                          \
295                 VMLINUX_SYMBOL(__end_builtin_fw) = .;                   \
296         }                                                               \
297                                                                         \
298         TRACEDATA                                                       \
299                                                                         \
300         /* Kernel symbol table: Normal symbols */                       \
301         __ksymtab         : AT(ADDR(__ksymtab) - LOAD_OFFSET) {         \
302                 VMLINUX_SYMBOL(__start___ksymtab) = .;                  \
303                 *(SORT(___ksymtab+*))                                   \
304                 VMLINUX_SYMBOL(__stop___ksymtab) = .;                   \
305         }                                                               \
306                                                                         \
307         /* Kernel symbol table: GPL-only symbols */                     \
308         __ksymtab_gpl     : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) {     \
309                 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .;              \
310                 *(SORT(___ksymtab_gpl+*))                               \
311                 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .;               \
312         }                                                               \
313                                                                         \
314         /* Kernel symbol table: Normal unused symbols */                \
315         __ksymtab_unused  : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) {  \
316                 VMLINUX_SYMBOL(__start___ksymtab_unused) = .;           \
317                 *(SORT(___ksymtab_unused+*))                            \
318                 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .;            \
319         }                                                               \
320                                                                         \
321         /* Kernel symbol table: GPL-only unused symbols */              \
322         __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
323                 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .;       \
324                 *(SORT(___ksymtab_unused_gpl+*))                        \
325                 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .;        \
326         }                                                               \
327                                                                         \
328         /* Kernel symbol table: GPL-future-only symbols */              \
329         __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
330                 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .;       \
331                 *(SORT(___ksymtab_gpl_future+*))                        \
332                 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .;        \
333         }                                                               \
334                                                                         \
335         /* Kernel symbol table: Normal symbols */                       \
336         __kcrctab         : AT(ADDR(__kcrctab) - LOAD_OFFSET) {         \
337                 VMLINUX_SYMBOL(__start___kcrctab) = .;                  \
338                 *(SORT(___kcrctab+*))                                   \
339                 VMLINUX_SYMBOL(__stop___kcrctab) = .;                   \
340         }                                                               \
341                                                                         \
342         /* Kernel symbol table: GPL-only symbols */                     \
343         __kcrctab_gpl     : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) {     \
344                 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .;              \
345                 *(SORT(___kcrctab_gpl+*))                               \
346                 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .;               \
347         }                                                               \
348                                                                         \
349         /* Kernel symbol table: Normal unused symbols */                \
350         __kcrctab_unused  : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) {  \
351                 VMLINUX_SYMBOL(__start___kcrctab_unused) = .;           \
352                 *(SORT(___kcrctab_unused+*))                            \
353                 VMLINUX_SYMBOL(__stop___kcrctab_unused) = .;            \
354         }                                                               \
355                                                                         \
356         /* Kernel symbol table: GPL-only unused symbols */              \
357         __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
358                 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .;       \
359                 *(SORT(___kcrctab_unused_gpl+*))                        \
360                 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .;        \
361         }                                                               \
362                                                                         \
363         /* Kernel symbol table: GPL-future-only symbols */              \
364         __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
365                 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .;       \
366                 *(SORT(___kcrctab_gpl_future+*))                        \
367                 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .;        \
368         }                                                               \
369                                                                         \
370         /* Kernel symbol table: strings */                              \
371         __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
372                 *(__ksymtab_strings)                                    \
373         }                                                               \
374                                                                         \
375         /* __*init sections */                                          \
376         __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) {         \
377                 *(.ref.rodata)                                          \
378                 MEM_KEEP(init.rodata)                                   \
379                 MEM_KEEP(exit.rodata)                                   \
380         }                                                               \
381                                                                         \
382         /* Built-in module parameters. */                               \
383         __param : AT(ADDR(__param) - LOAD_OFFSET) {                     \
384                 VMLINUX_SYMBOL(__start___param) = .;                    \
385                 *(__param)                                              \
386                 VMLINUX_SYMBOL(__stop___param) = .;                     \
387         }                                                               \
388                                                                         \
389         /* Built-in module versions. */                                 \
390         __modver : AT(ADDR(__modver) - LOAD_OFFSET) {                   \
391                 VMLINUX_SYMBOL(__start___modver) = .;                   \
392                 *(__modver)                                             \
393                 VMLINUX_SYMBOL(__stop___modver) = .;                    \
394                 . = ALIGN((align));                                     \
395                 VMLINUX_SYMBOL(__end_rodata) = .;                       \
396         }                                                               \
397         . = ALIGN((align));
398
399 /* RODATA & RO_DATA provided for backward compatibility.
400  * All archs are supposed to use RO_DATA() */
401 #define RODATA          RO_DATA_SECTION(4096)
402 #define RO_DATA(align)  RO_DATA_SECTION(align)
403
404 #define SECURITY_INIT                                                   \
405         .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
406                 VMLINUX_SYMBOL(__security_initcall_start) = .;          \
407                 *(.security_initcall.init)                              \
408                 VMLINUX_SYMBOL(__security_initcall_end) = .;            \
409         }
410
411 /* .text section. Map to function alignment to avoid address changes
412  * during second ld run in second ld pass when generating System.map */
413 #define TEXT_TEXT                                                       \
414                 ALIGN_FUNCTION();                                       \
415                 *(.text.hot)                                            \
416                 *(.text .text.fixup)                                    \
417                 *(.ref.text)                                            \
418         MEM_KEEP(init.text)                                             \
419         MEM_KEEP(exit.text)                                             \
420                 *(.text.unlikely)
421
422
423 /* sched.text is aling to function alignment to secure we have same
424  * address even at second ld pass when generating System.map */
425 #define SCHED_TEXT                                                      \
426                 ALIGN_FUNCTION();                                       \
427                 VMLINUX_SYMBOL(__sched_text_start) = .;                 \
428                 *(.sched.text)                                          \
429                 VMLINUX_SYMBOL(__sched_text_end) = .;
430
431 /* spinlock.text is aling to function alignment to secure we have same
432  * address even at second ld pass when generating System.map */
433 #define LOCK_TEXT                                                       \
434                 ALIGN_FUNCTION();                                       \
435                 VMLINUX_SYMBOL(__lock_text_start) = .;                  \
436                 *(.spinlock.text)                                       \
437                 VMLINUX_SYMBOL(__lock_text_end) = .;
438
439 #define KPROBES_TEXT                                                    \
440                 ALIGN_FUNCTION();                                       \
441                 VMLINUX_SYMBOL(__kprobes_text_start) = .;               \
442                 *(.kprobes.text)                                        \
443                 VMLINUX_SYMBOL(__kprobes_text_end) = .;
444
445 #define ENTRY_TEXT                                                      \
446                 ALIGN_FUNCTION();                                       \
447                 VMLINUX_SYMBOL(__entry_text_start) = .;                 \
448                 *(.entry.text)                                          \
449                 VMLINUX_SYMBOL(__entry_text_end) = .;
450
451 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
452 #define IRQENTRY_TEXT                                                   \
453                 ALIGN_FUNCTION();                                       \
454                 VMLINUX_SYMBOL(__irqentry_text_start) = .;              \
455                 *(.irqentry.text)                                       \
456                 VMLINUX_SYMBOL(__irqentry_text_end) = .;
457 #else
458 #define IRQENTRY_TEXT
459 #endif
460
461 /* Section used for early init (in .S files) */
462 #define HEAD_TEXT  *(.head.text)
463
464 #define HEAD_TEXT_SECTION                                                       \
465         .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) {               \
466                 HEAD_TEXT                                               \
467         }
468
469 /*
470  * Exception table
471  */
472 #define EXCEPTION_TABLE(align)                                          \
473         . = ALIGN(align);                                               \
474         __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {               \
475                 VMLINUX_SYMBOL(__start___ex_table) = .;                 \
476                 *(__ex_table)                                           \
477                 VMLINUX_SYMBOL(__stop___ex_table) = .;                  \
478         }
479
480 /*
481  * Init task
482  */
483 #define INIT_TASK_DATA_SECTION(align)                                   \
484         . = ALIGN(align);                                               \
485         .data..init_task :  AT(ADDR(.data..init_task) - LOAD_OFFSET) {  \
486                 INIT_TASK_DATA(align)                                   \
487         }
488
489 #ifdef CONFIG_CONSTRUCTORS
490 #define KERNEL_CTORS()  . = ALIGN(8);                      \
491                         VMLINUX_SYMBOL(__ctors_start) = .; \
492                         *(.ctors)                          \
493                         *(SORT(.init_array.*))             \
494                         *(.init_array)                     \
495                         VMLINUX_SYMBOL(__ctors_end) = .;
496 #else
497 #define KERNEL_CTORS()
498 #endif
499
500 /* init and exit section handling */
501 #define INIT_DATA                                                       \
502         *(.init.data)                                                   \
503         MEM_DISCARD(init.data)                                          \
504         KERNEL_CTORS()                                                  \
505         MCOUNT_REC()                                                    \
506         *(.init.rodata)                                                 \
507         FTRACE_EVENTS()                                                 \
508         TRACE_SYSCALLS()                                                \
509         KPROBE_BLACKLIST()                                              \
510         MEM_DISCARD(init.rodata)                                        \
511         CLK_OF_TABLES()                                                 \
512         RESERVEDMEM_OF_TABLES()                                         \
513         CLKSRC_OF_TABLES()                                              \
514         IOMMU_OF_TABLES()                                               \
515         CPU_METHOD_OF_TABLES()                                          \
516         CPUIDLE_METHOD_OF_TABLES()                                      \
517         KERNEL_DTB()                                                    \
518         IRQCHIP_OF_MATCH_TABLE()                                        \
519         EARLYCON_TABLE()                                                \
520         EARLYCON_OF_TABLES()
521
522 #define INIT_TEXT                                                       \
523         *(.init.text)                                                   \
524         MEM_DISCARD(init.text)
525
526 #define EXIT_DATA                                                       \
527         *(.exit.data)                                                   \
528         MEM_DISCARD(exit.data)                                          \
529         MEM_DISCARD(exit.rodata)
530
531 #define EXIT_TEXT                                                       \
532         *(.exit.text)                                                   \
533         MEM_DISCARD(exit.text)
534
535 #define EXIT_CALL                                                       \
536         *(.exitcall.exit)
537
538 /*
539  * bss (Block Started by Symbol) - uninitialized data
540  * zeroed during startup
541  */
542 #define SBSS(sbss_align)                                                \
543         . = ALIGN(sbss_align);                                          \
544         .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) {                         \
545                 *(.sbss)                                                \
546                 *(.scommon)                                             \
547         }
548
549 /*
550  * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra
551  * sections to the front of bss.
552  */
553 #ifndef BSS_FIRST_SECTIONS
554 #define BSS_FIRST_SECTIONS
555 #endif
556
557 #define BSS(bss_align)                                                  \
558         . = ALIGN(bss_align);                                           \
559         .bss : AT(ADDR(.bss) - LOAD_OFFSET) {                           \
560                 BSS_FIRST_SECTIONS                                      \
561                 *(.bss..page_aligned)                                   \
562                 *(.dynbss)                                              \
563                 *(.bss)                                                 \
564                 *(COMMON)                                               \
565         }
566
567 /*
568  * DWARF debug sections.
569  * Symbols in the DWARF debugging sections are relative to
570  * the beginning of the section so we begin them at 0.
571  */
572 #define DWARF_DEBUG                                                     \
573                 /* DWARF 1 */                                           \
574                 .debug          0 : { *(.debug) }                       \
575                 .line           0 : { *(.line) }                        \
576                 /* GNU DWARF 1 extensions */                            \
577                 .debug_srcinfo  0 : { *(.debug_srcinfo) }               \
578                 .debug_sfnames  0 : { *(.debug_sfnames) }               \
579                 /* DWARF 1.1 and DWARF 2 */                             \
580                 .debug_aranges  0 : { *(.debug_aranges) }               \
581                 .debug_pubnames 0 : { *(.debug_pubnames) }              \
582                 /* DWARF 2 */                                           \
583                 .debug_info     0 : { *(.debug_info                     \
584                                 .gnu.linkonce.wi.*) }                   \
585                 .debug_abbrev   0 : { *(.debug_abbrev) }                \
586                 .debug_line     0 : { *(.debug_line) }                  \
587                 .debug_frame    0 : { *(.debug_frame) }                 \
588                 .debug_str      0 : { *(.debug_str) }                   \
589                 .debug_loc      0 : { *(.debug_loc) }                   \
590                 .debug_macinfo  0 : { *(.debug_macinfo) }               \
591                 /* SGI/MIPS DWARF 2 extensions */                       \
592                 .debug_weaknames 0 : { *(.debug_weaknames) }            \
593                 .debug_funcnames 0 : { *(.debug_funcnames) }            \
594                 .debug_typenames 0 : { *(.debug_typenames) }            \
595                 .debug_varnames  0 : { *(.debug_varnames) }             \
596
597                 /* Stabs debugging sections.  */
598 #define STABS_DEBUG                                                     \
599                 .stab 0 : { *(.stab) }                                  \
600                 .stabstr 0 : { *(.stabstr) }                            \
601                 .stab.excl 0 : { *(.stab.excl) }                        \
602                 .stab.exclstr 0 : { *(.stab.exclstr) }                  \
603                 .stab.index 0 : { *(.stab.index) }                      \
604                 .stab.indexstr 0 : { *(.stab.indexstr) }                \
605                 .comment 0 : { *(.comment) }
606
607 #ifdef CONFIG_GENERIC_BUG
608 #define BUG_TABLE                                                       \
609         . = ALIGN(8);                                                   \
610         __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) {             \
611                 VMLINUX_SYMBOL(__start___bug_table) = .;                \
612                 *(__bug_table)                                          \
613                 VMLINUX_SYMBOL(__stop___bug_table) = .;                 \
614         }
615 #else
616 #define BUG_TABLE
617 #endif
618
619 #ifdef CONFIG_PM_TRACE
620 #define TRACEDATA                                                       \
621         . = ALIGN(4);                                                   \
622         .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) {               \
623                 VMLINUX_SYMBOL(__tracedata_start) = .;                  \
624                 *(.tracedata)                                           \
625                 VMLINUX_SYMBOL(__tracedata_end) = .;                    \
626         }
627 #else
628 #define TRACEDATA
629 #endif
630
631 #define NOTES                                                           \
632         .notes : AT(ADDR(.notes) - LOAD_OFFSET) {                       \
633                 VMLINUX_SYMBOL(__start_notes) = .;                      \
634                 *(.note.*)                                              \
635                 VMLINUX_SYMBOL(__stop_notes) = .;                       \
636         }
637
638 #define INIT_SETUP(initsetup_align)                                     \
639                 . = ALIGN(initsetup_align);                             \
640                 VMLINUX_SYMBOL(__setup_start) = .;                      \
641                 *(.init.setup)                                          \
642                 VMLINUX_SYMBOL(__setup_end) = .;
643
644 #define INIT_CALLS_LEVEL(level)                                         \
645                 VMLINUX_SYMBOL(__initcall##level##_start) = .;          \
646                 *(.initcall##level##.init)                              \
647                 *(.initcall##level##s.init)                             \
648
649 #define INIT_CALLS                                                      \
650                 VMLINUX_SYMBOL(__initcall_start) = .;                   \
651                 *(.initcallearly.init)                                  \
652                 INIT_CALLS_LEVEL(0)                                     \
653                 INIT_CALLS_LEVEL(1)                                     \
654                 INIT_CALLS_LEVEL(2)                                     \
655                 INIT_CALLS_LEVEL(3)                                     \
656                 INIT_CALLS_LEVEL(4)                                     \
657                 INIT_CALLS_LEVEL(5)                                     \
658                 INIT_CALLS_LEVEL(rootfs)                                \
659                 INIT_CALLS_LEVEL(6)                                     \
660                 INIT_CALLS_LEVEL(7)                                     \
661                 VMLINUX_SYMBOL(__initcall_end) = .;
662
663 #define CON_INITCALL                                                    \
664                 VMLINUX_SYMBOL(__con_initcall_start) = .;               \
665                 *(.con_initcall.init)                                   \
666                 VMLINUX_SYMBOL(__con_initcall_end) = .;
667
668 #define SECURITY_INITCALL                                               \
669                 VMLINUX_SYMBOL(__security_initcall_start) = .;          \
670                 *(.security_initcall.init)                              \
671                 VMLINUX_SYMBOL(__security_initcall_end) = .;
672
673 #ifdef CONFIG_BLK_DEV_INITRD
674 #define INIT_RAM_FS                                                     \
675         . = ALIGN(4);                                                   \
676         VMLINUX_SYMBOL(__initramfs_start) = .;                          \
677         *(.init.ramfs)                                                  \
678         . = ALIGN(8);                                                   \
679         *(.init.ramfs.info)
680 #else
681 #define INIT_RAM_FS
682 #endif
683
684 /*
685  * Default discarded sections.
686  *
687  * Some archs want to discard exit text/data at runtime rather than
688  * link time due to cross-section references such as alt instructions,
689  * bug table, eh_frame, etc.  DISCARDS must be the last of output
690  * section definitions so that such archs put those in earlier section
691  * definitions.
692  */
693 #define DISCARDS                                                        \
694         /DISCARD/ : {                                                   \
695         EXIT_TEXT                                                       \
696         EXIT_DATA                                                       \
697         EXIT_CALL                                                       \
698         *(.discard)                                                     \
699         *(.discard.*)                                                   \
700         }
701
702 /**
703  * PERCPU_INPUT - the percpu input sections
704  * @cacheline: cacheline size
705  *
706  * The core percpu section names and core symbols which do not rely
707  * directly upon load addresses.
708  *
709  * @cacheline is used to align subsections to avoid false cacheline
710  * sharing between subsections for different purposes.
711  */
712 #define PERCPU_INPUT(cacheline)                                         \
713         VMLINUX_SYMBOL(__per_cpu_start) = .;                            \
714         *(.data..percpu..first)                                         \
715         . = ALIGN(PAGE_SIZE);                                           \
716         *(.data..percpu..page_aligned)                                  \
717         . = ALIGN(cacheline);                                           \
718         *(.data..percpu..read_mostly)                                   \
719         . = ALIGN(cacheline);                                           \
720         *(.data..percpu)                                                \
721         *(.data..percpu..shared_aligned)                                \
722         VMLINUX_SYMBOL(__per_cpu_end) = .;
723
724 /**
725  * PERCPU_VADDR - define output section for percpu area
726  * @cacheline: cacheline size
727  * @vaddr: explicit base address (optional)
728  * @phdr: destination PHDR (optional)
729  *
730  * Macro which expands to output section for percpu area.
731  *
732  * @cacheline is used to align subsections to avoid false cacheline
733  * sharing between subsections for different purposes.
734  *
735  * If @vaddr is not blank, it specifies explicit base address and all
736  * percpu symbols will be offset from the given address.  If blank,
737  * @vaddr always equals @laddr + LOAD_OFFSET.
738  *
739  * @phdr defines the output PHDR to use if not blank.  Be warned that
740  * output PHDR is sticky.  If @phdr is specified, the next output
741  * section in the linker script will go there too.  @phdr should have
742  * a leading colon.
743  *
744  * Note that this macros defines __per_cpu_load as an absolute symbol.
745  * If there is no need to put the percpu section at a predetermined
746  * address, use PERCPU_SECTION.
747  */
748 #define PERCPU_VADDR(cacheline, vaddr, phdr)                            \
749         VMLINUX_SYMBOL(__per_cpu_load) = .;                             \
750         .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load)         \
751                                 - LOAD_OFFSET) {                        \
752                 PERCPU_INPUT(cacheline)                                 \
753         } phdr                                                          \
754         . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu);
755
756 /**
757  * PERCPU_SECTION - define output section for percpu area, simple version
758  * @cacheline: cacheline size
759  *
760  * Align to PAGE_SIZE and outputs output section for percpu area.  This
761  * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and
762  * __per_cpu_start will be identical.
763  *
764  * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,)
765  * except that __per_cpu_load is defined as a relative symbol against
766  * .data..percpu which is required for relocatable x86_32 configuration.
767  */
768 #define PERCPU_SECTION(cacheline)                                       \
769         . = ALIGN(PAGE_SIZE);                                           \
770         .data..percpu   : AT(ADDR(.data..percpu) - LOAD_OFFSET) {       \
771                 VMLINUX_SYMBOL(__per_cpu_load) = .;                     \
772                 PERCPU_INPUT(cacheline)                                 \
773         }
774
775
776 /*
777  * Definition of the high level *_SECTION macros
778  * They will fit only a subset of the architectures
779  */
780
781
782 /*
783  * Writeable data.
784  * All sections are combined in a single .data section.
785  * The sections following CONSTRUCTORS are arranged so their
786  * typical alignment matches.
787  * A cacheline is typical/always less than a PAGE_SIZE so
788  * the sections that has this restriction (or similar)
789  * is located before the ones requiring PAGE_SIZE alignment.
790  * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
791  * matches the requirement of PAGE_ALIGNED_DATA.
792  *
793  * use 0 as page_align if page_aligned data is not used */
794 #define RW_DATA_SECTION(cacheline, pagealigned, inittask)               \
795         . = ALIGN(PAGE_SIZE);                                           \
796         .data : AT(ADDR(.data) - LOAD_OFFSET) {                         \
797                 INIT_TASK_DATA(inittask)                                \
798                 NOSAVE_DATA                                             \
799                 PAGE_ALIGNED_DATA(pagealigned)                          \
800                 CACHELINE_ALIGNED_DATA(cacheline)                       \
801                 READ_MOSTLY_DATA(cacheline)                             \
802                 DATA_DATA                                               \
803                 CONSTRUCTORS                                            \
804         }
805
806 #define INIT_TEXT_SECTION(inittext_align)                               \
807         . = ALIGN(inittext_align);                                      \
808         .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {               \
809                 VMLINUX_SYMBOL(_sinittext) = .;                         \
810                 INIT_TEXT                                               \
811                 VMLINUX_SYMBOL(_einittext) = .;                         \
812         }
813
814 #define INIT_DATA_SECTION(initsetup_align)                              \
815         .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {               \
816                 INIT_DATA                                               \
817                 INIT_SETUP(initsetup_align)                             \
818                 INIT_CALLS                                              \
819                 CON_INITCALL                                            \
820                 SECURITY_INITCALL                                       \
821                 INIT_RAM_FS                                             \
822         }
823
824 #define BSS_SECTION(sbss_align, bss_align, stop_align)                  \
825         . = ALIGN(sbss_align);                                          \
826         VMLINUX_SYMBOL(__bss_start) = .;                                \
827         SBSS(sbss_align)                                                \
828         BSS(bss_align)                                                  \
829         . = ALIGN(stop_align);                                          \
830         VMLINUX_SYMBOL(__bss_stop) = .;