Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux
[sfrench/cifs-2.6.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 /* Align . to a 8 byte boundary equals to maximum function alignment. */
58 #define ALIGN_FUNCTION()  . = ALIGN(8)
59
60 /*
61  * LD_DEAD_CODE_DATA_ELIMINATION option enables -fdata-sections, which
62  * generates .data.identifier sections, which need to be pulled in with
63  * .data. We don't want to pull in .data..other sections, which Linux
64  * has defined. Same for text and bss.
65  *
66  * RODATA_MAIN is not used because existing code already defines .rodata.x
67  * sections to be brought in with rodata.
68  */
69 #ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
70 #define TEXT_MAIN .text .text.[0-9a-zA-Z_]*
71 #define DATA_MAIN .data .data.[0-9a-zA-Z_]* .data..LPBX*
72 #define SDATA_MAIN .sdata .sdata.[0-9a-zA-Z_]*
73 #define RODATA_MAIN .rodata .rodata.[0-9a-zA-Z_]*
74 #define BSS_MAIN .bss .bss.[0-9a-zA-Z_]*
75 #define SBSS_MAIN .sbss .sbss.[0-9a-zA-Z_]*
76 #else
77 #define TEXT_MAIN .text
78 #define DATA_MAIN .data
79 #define SDATA_MAIN .sdata
80 #define RODATA_MAIN .rodata
81 #define BSS_MAIN .bss
82 #define SBSS_MAIN .sbss
83 #endif
84
85 /*
86  * Align to a 32 byte boundary equal to the
87  * alignment gcc 4.5 uses for a struct
88  */
89 #define STRUCT_ALIGNMENT 32
90 #define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT)
91
92 /* The actual configuration determine if the init/exit sections
93  * are handled as text/data or they can be discarded (which
94  * often happens at runtime)
95  */
96 #ifdef CONFIG_HOTPLUG_CPU
97 #define CPU_KEEP(sec)    *(.cpu##sec)
98 #define CPU_DISCARD(sec)
99 #else
100 #define CPU_KEEP(sec)
101 #define CPU_DISCARD(sec) *(.cpu##sec)
102 #endif
103
104 #if defined(CONFIG_MEMORY_HOTPLUG)
105 #define MEM_KEEP(sec)    *(.mem##sec)
106 #define MEM_DISCARD(sec)
107 #else
108 #define MEM_KEEP(sec)
109 #define MEM_DISCARD(sec) *(.mem##sec)
110 #endif
111
112 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
113 #ifdef CC_USING_PATCHABLE_FUNCTION_ENTRY
114 #define MCOUNT_REC()    . = ALIGN(8);                           \
115                         __start_mcount_loc = .;                 \
116                         KEEP(*(__patchable_function_entries))   \
117                         __stop_mcount_loc = .;
118 #else
119 #define MCOUNT_REC()    . = ALIGN(8);                           \
120                         __start_mcount_loc = .;                 \
121                         KEEP(*(__mcount_loc))                   \
122                         __stop_mcount_loc = .;
123 #endif
124 #else
125 #define MCOUNT_REC()
126 #endif
127
128 #ifdef CONFIG_TRACE_BRANCH_PROFILING
129 #define LIKELY_PROFILE()        __start_annotated_branch_profile = .;   \
130                                 KEEP(*(_ftrace_annotated_branch))       \
131                                 __stop_annotated_branch_profile = .;
132 #else
133 #define LIKELY_PROFILE()
134 #endif
135
136 #ifdef CONFIG_PROFILE_ALL_BRANCHES
137 #define BRANCH_PROFILE()        __start_branch_profile = .;             \
138                                 KEEP(*(_ftrace_branch))                 \
139                                 __stop_branch_profile = .;
140 #else
141 #define BRANCH_PROFILE()
142 #endif
143
144 #ifdef CONFIG_KPROBES
145 #define KPROBE_BLACKLIST()      . = ALIGN(8);                                 \
146                                 __start_kprobe_blacklist = .;                 \
147                                 KEEP(*(_kprobe_blacklist))                    \
148                                 __stop_kprobe_blacklist = .;
149 #else
150 #define KPROBE_BLACKLIST()
151 #endif
152
153 #ifdef CONFIG_FUNCTION_ERROR_INJECTION
154 #define ERROR_INJECT_WHITELIST()        STRUCT_ALIGN();                       \
155                         __start_error_injection_whitelist = .;                \
156                         KEEP(*(_error_injection_whitelist))                   \
157                         __stop_error_injection_whitelist = .;
158 #else
159 #define ERROR_INJECT_WHITELIST()
160 #endif
161
162 #ifdef CONFIG_EVENT_TRACING
163 #define FTRACE_EVENTS() . = ALIGN(8);                                   \
164                         __start_ftrace_events = .;                      \
165                         KEEP(*(_ftrace_events))                         \
166                         __stop_ftrace_events = .;                       \
167                         __start_ftrace_eval_maps = .;                   \
168                         KEEP(*(_ftrace_eval_map))                       \
169                         __stop_ftrace_eval_maps = .;
170 #else
171 #define FTRACE_EVENTS()
172 #endif
173
174 #ifdef CONFIG_TRACING
175 #define TRACE_PRINTKS()  __start___trace_bprintk_fmt = .;      \
176                          KEEP(*(__trace_printk_fmt)) /* Trace_printk fmt' pointer */ \
177                          __stop___trace_bprintk_fmt = .;
178 #define TRACEPOINT_STR() __start___tracepoint_str = .;  \
179                          KEEP(*(__tracepoint_str)) /* Trace_printk fmt' pointer */ \
180                          __stop___tracepoint_str = .;
181 #else
182 #define TRACE_PRINTKS()
183 #define TRACEPOINT_STR()
184 #endif
185
186 #ifdef CONFIG_FTRACE_SYSCALLS
187 #define TRACE_SYSCALLS() . = ALIGN(8);                                  \
188                          __start_syscalls_metadata = .;                 \
189                          KEEP(*(__syscalls_metadata))                   \
190                          __stop_syscalls_metadata = .;
191 #else
192 #define TRACE_SYSCALLS()
193 #endif
194
195 #ifdef CONFIG_BPF_EVENTS
196 #define BPF_RAW_TP() STRUCT_ALIGN();                                    \
197                          __start__bpf_raw_tp = .;                       \
198                          KEEP(*(__bpf_raw_tp_map))                      \
199                          __stop__bpf_raw_tp = .;
200 #else
201 #define BPF_RAW_TP()
202 #endif
203
204 #ifdef CONFIG_SERIAL_EARLYCON
205 #define EARLYCON_TABLE() . = ALIGN(8);                          \
206                          __earlycon_table = .;                  \
207                          KEEP(*(__earlycon_table))              \
208                          __earlycon_table_end = .;
209 #else
210 #define EARLYCON_TABLE()
211 #endif
212
213 #ifdef CONFIG_SECURITY
214 #define LSM_TABLE()     . = ALIGN(8);                                   \
215                         __start_lsm_info = .;                           \
216                         KEEP(*(.lsm_info.init))                         \
217                         __end_lsm_info = .;
218 #else
219 #define LSM_TABLE()
220 #endif
221
222 #define ___OF_TABLE(cfg, name)  _OF_TABLE_##cfg(name)
223 #define __OF_TABLE(cfg, name)   ___OF_TABLE(cfg, name)
224 #define OF_TABLE(cfg, name)     __OF_TABLE(IS_ENABLED(cfg), name)
225 #define _OF_TABLE_0(name)
226 #define _OF_TABLE_1(name)                                               \
227         . = ALIGN(8);                                                   \
228         __##name##_of_table = .;                                        \
229         KEEP(*(__##name##_of_table))                                    \
230         KEEP(*(__##name##_of_table_end))
231
232 #define TIMER_OF_TABLES()       OF_TABLE(CONFIG_TIMER_OF, timer)
233 #define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip)
234 #define CLK_OF_TABLES()         OF_TABLE(CONFIG_COMMON_CLK, clk)
235 #define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem)
236 #define CPU_METHOD_OF_TABLES()  OF_TABLE(CONFIG_SMP, cpu_method)
237 #define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method)
238
239 #ifdef CONFIG_ACPI
240 #define ACPI_PROBE_TABLE(name)                                          \
241         . = ALIGN(8);                                                   \
242         __##name##_acpi_probe_table = .;                                \
243         KEEP(*(__##name##_acpi_probe_table))                            \
244         __##name##_acpi_probe_table_end = .;
245 #else
246 #define ACPI_PROBE_TABLE(name)
247 #endif
248
249 #ifdef CONFIG_THERMAL
250 #define THERMAL_TABLE(name)                                             \
251         . = ALIGN(8);                                                   \
252         __##name##_thermal_table = .;                                   \
253         KEEP(*(__##name##_thermal_table))                               \
254         __##name##_thermal_table_end = .;
255 #else
256 #define THERMAL_TABLE(name)
257 #endif
258
259 #define KERNEL_DTB()                                                    \
260         STRUCT_ALIGN();                                                 \
261         __dtb_start = .;                                                \
262         KEEP(*(.dtb.init.rodata))                                       \
263         __dtb_end = .;
264
265 /*
266  * .data section
267  */
268 #define DATA_DATA                                                       \
269         *(.xiptext)                                                     \
270         *(DATA_MAIN)                                                    \
271         *(.ref.data)                                                    \
272         *(.data..shared_aligned) /* percpu related */                   \
273         MEM_KEEP(init.data*)                                            \
274         MEM_KEEP(exit.data*)                                            \
275         *(.data.unlikely)                                               \
276         __start_once = .;                                               \
277         *(.data.once)                                                   \
278         __end_once = .;                                                 \
279         STRUCT_ALIGN();                                                 \
280         *(__tracepoints)                                                \
281         /* implement dynamic printk debug */                            \
282         . = ALIGN(8);                                                   \
283         __start___verbose = .;                                          \
284         KEEP(*(__verbose))                                              \
285         __stop___verbose = .;                                           \
286         LIKELY_PROFILE()                                                \
287         BRANCH_PROFILE()                                                \
288         TRACE_PRINTKS()                                                 \
289         BPF_RAW_TP()                                                    \
290         TRACEPOINT_STR()
291
292 /*
293  * Data section helpers
294  */
295 #define NOSAVE_DATA                                                     \
296         . = ALIGN(PAGE_SIZE);                                           \
297         __nosave_begin = .;                                             \
298         *(.data..nosave)                                                \
299         . = ALIGN(PAGE_SIZE);                                           \
300         __nosave_end = .;
301
302 #define PAGE_ALIGNED_DATA(page_align)                                   \
303         . = ALIGN(page_align);                                          \
304         *(.data..page_aligned)
305
306 #define READ_MOSTLY_DATA(align)                                         \
307         . = ALIGN(align);                                               \
308         *(.data..read_mostly)                                           \
309         . = ALIGN(align);
310
311 #define CACHELINE_ALIGNED_DATA(align)                                   \
312         . = ALIGN(align);                                               \
313         *(.data..cacheline_aligned)
314
315 #define INIT_TASK_DATA(align)                                           \
316         . = ALIGN(align);                                               \
317         __start_init_task = .;                                          \
318         init_thread_union = .;                                          \
319         init_stack = .;                                                 \
320         KEEP(*(.data..init_task))                                       \
321         KEEP(*(.data..init_thread_info))                                \
322         . = __start_init_task + THREAD_SIZE;                            \
323         __end_init_task = .;
324
325 #define JUMP_TABLE_DATA                                                 \
326         . = ALIGN(8);                                                   \
327         __start___jump_table = .;                                       \
328         KEEP(*(__jump_table))                                           \
329         __stop___jump_table = .;
330
331 /*
332  * Allow architectures to handle ro_after_init data on their
333  * own by defining an empty RO_AFTER_INIT_DATA.
334  */
335 #ifndef RO_AFTER_INIT_DATA
336 #define RO_AFTER_INIT_DATA                                              \
337         __start_ro_after_init = .;                                      \
338         *(.data..ro_after_init)                                         \
339         JUMP_TABLE_DATA                                                 \
340         __end_ro_after_init = .;
341 #endif
342
343 /*
344  * Read only Data
345  */
346 #define RO_DATA_SECTION(align)                                          \
347         . = ALIGN((align));                                             \
348         .rodata           : AT(ADDR(.rodata) - LOAD_OFFSET) {           \
349                 __start_rodata = .;                                     \
350                 *(.rodata) *(.rodata.*)                                 \
351                 RO_AFTER_INIT_DATA      /* Read only after init */      \
352                 . = ALIGN(8);                                           \
353                 __start___tracepoints_ptrs = .;                         \
354                 KEEP(*(__tracepoints_ptrs)) /* Tracepoints: pointer array */ \
355                 __stop___tracepoints_ptrs = .;                          \
356                 *(__tracepoints_strings)/* Tracepoints: strings */      \
357         }                                                               \
358                                                                         \
359         .rodata1          : AT(ADDR(.rodata1) - LOAD_OFFSET) {          \
360                 *(.rodata1)                                             \
361         }                                                               \
362                                                                         \
363         /* PCI quirks */                                                \
364         .pci_fixup        : AT(ADDR(.pci_fixup) - LOAD_OFFSET) {        \
365                 __start_pci_fixups_early = .;                           \
366                 KEEP(*(.pci_fixup_early))                               \
367                 __end_pci_fixups_early = .;                             \
368                 __start_pci_fixups_header = .;                          \
369                 KEEP(*(.pci_fixup_header))                              \
370                 __end_pci_fixups_header = .;                            \
371                 __start_pci_fixups_final = .;                           \
372                 KEEP(*(.pci_fixup_final))                               \
373                 __end_pci_fixups_final = .;                             \
374                 __start_pci_fixups_enable = .;                          \
375                 KEEP(*(.pci_fixup_enable))                              \
376                 __end_pci_fixups_enable = .;                            \
377                 __start_pci_fixups_resume = .;                          \
378                 KEEP(*(.pci_fixup_resume))                              \
379                 __end_pci_fixups_resume = .;                            \
380                 __start_pci_fixups_resume_early = .;                    \
381                 KEEP(*(.pci_fixup_resume_early))                        \
382                 __end_pci_fixups_resume_early = .;                      \
383                 __start_pci_fixups_suspend = .;                         \
384                 KEEP(*(.pci_fixup_suspend))                             \
385                 __end_pci_fixups_suspend = .;                           \
386                 __start_pci_fixups_suspend_late = .;                    \
387                 KEEP(*(.pci_fixup_suspend_late))                        \
388                 __end_pci_fixups_suspend_late = .;                      \
389         }                                                               \
390                                                                         \
391         /* Built-in firmware blobs */                                   \
392         .builtin_fw        : AT(ADDR(.builtin_fw) - LOAD_OFFSET) {      \
393                 __start_builtin_fw = .;                                 \
394                 KEEP(*(.builtin_fw))                                    \
395                 __end_builtin_fw = .;                                   \
396         }                                                               \
397                                                                         \
398         TRACEDATA                                                       \
399                                                                         \
400         /* Kernel symbol table: Normal symbols */                       \
401         __ksymtab         : AT(ADDR(__ksymtab) - LOAD_OFFSET) {         \
402                 __start___ksymtab = .;                                  \
403                 KEEP(*(SORT(___ksymtab+*)))                             \
404                 __stop___ksymtab = .;                                   \
405         }                                                               \
406                                                                         \
407         /* Kernel symbol table: GPL-only symbols */                     \
408         __ksymtab_gpl     : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) {     \
409                 __start___ksymtab_gpl = .;                              \
410                 KEEP(*(SORT(___ksymtab_gpl+*)))                         \
411                 __stop___ksymtab_gpl = .;                               \
412         }                                                               \
413                                                                         \
414         /* Kernel symbol table: Normal unused symbols */                \
415         __ksymtab_unused  : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) {  \
416                 __start___ksymtab_unused = .;                           \
417                 KEEP(*(SORT(___ksymtab_unused+*)))                      \
418                 __stop___ksymtab_unused = .;                            \
419         }                                                               \
420                                                                         \
421         /* Kernel symbol table: GPL-only unused symbols */              \
422         __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
423                 __start___ksymtab_unused_gpl = .;                       \
424                 KEEP(*(SORT(___ksymtab_unused_gpl+*)))                  \
425                 __stop___ksymtab_unused_gpl = .;                        \
426         }                                                               \
427                                                                         \
428         /* Kernel symbol table: GPL-future-only symbols */              \
429         __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
430                 __start___ksymtab_gpl_future = .;                       \
431                 KEEP(*(SORT(___ksymtab_gpl_future+*)))                  \
432                 __stop___ksymtab_gpl_future = .;                        \
433         }                                                               \
434                                                                         \
435         /* Kernel symbol table: Normal symbols */                       \
436         __kcrctab         : AT(ADDR(__kcrctab) - LOAD_OFFSET) {         \
437                 __start___kcrctab = .;                                  \
438                 KEEP(*(SORT(___kcrctab+*)))                             \
439                 __stop___kcrctab = .;                                   \
440         }                                                               \
441                                                                         \
442         /* Kernel symbol table: GPL-only symbols */                     \
443         __kcrctab_gpl     : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) {     \
444                 __start___kcrctab_gpl = .;                              \
445                 KEEP(*(SORT(___kcrctab_gpl+*)))                         \
446                 __stop___kcrctab_gpl = .;                               \
447         }                                                               \
448                                                                         \
449         /* Kernel symbol table: Normal unused symbols */                \
450         __kcrctab_unused  : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) {  \
451                 __start___kcrctab_unused = .;                           \
452                 KEEP(*(SORT(___kcrctab_unused+*)))                      \
453                 __stop___kcrctab_unused = .;                            \
454         }                                                               \
455                                                                         \
456         /* Kernel symbol table: GPL-only unused symbols */              \
457         __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
458                 __start___kcrctab_unused_gpl = .;                       \
459                 KEEP(*(SORT(___kcrctab_unused_gpl+*)))                  \
460                 __stop___kcrctab_unused_gpl = .;                        \
461         }                                                               \
462                                                                         \
463         /* Kernel symbol table: GPL-future-only symbols */              \
464         __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
465                 __start___kcrctab_gpl_future = .;                       \
466                 KEEP(*(SORT(___kcrctab_gpl_future+*)))                  \
467                 __stop___kcrctab_gpl_future = .;                        \
468         }                                                               \
469                                                                         \
470         /* Kernel symbol table: strings */                              \
471         __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
472                 *(__ksymtab_strings)                                    \
473         }                                                               \
474                                                                         \
475         /* __*init sections */                                          \
476         __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) {         \
477                 *(.ref.rodata)                                          \
478                 MEM_KEEP(init.rodata)                                   \
479                 MEM_KEEP(exit.rodata)                                   \
480         }                                                               \
481                                                                         \
482         /* Built-in module parameters. */                               \
483         __param : AT(ADDR(__param) - LOAD_OFFSET) {                     \
484                 __start___param = .;                                    \
485                 KEEP(*(__param))                                        \
486                 __stop___param = .;                                     \
487         }                                                               \
488                                                                         \
489         /* Built-in module versions. */                                 \
490         __modver : AT(ADDR(__modver) - LOAD_OFFSET) {                   \
491                 __start___modver = .;                                   \
492                 KEEP(*(__modver))                                       \
493                 __stop___modver = .;                                    \
494                 . = ALIGN((align));                                     \
495                 __end_rodata = .;                                       \
496         }                                                               \
497         . = ALIGN((align));
498
499 /* RODATA & RO_DATA provided for backward compatibility.
500  * All archs are supposed to use RO_DATA() */
501 #define RODATA          RO_DATA_SECTION(4096)
502 #define RO_DATA(align)  RO_DATA_SECTION(align)
503
504 /*
505  * .text section. Map to function alignment to avoid address changes
506  * during second ld run in second ld pass when generating System.map
507  *
508  * TEXT_MAIN here will match .text.fixup and .text.unlikely if dead
509  * code elimination is enabled, so these sections should be converted
510  * to use ".." first.
511  */
512 #define TEXT_TEXT                                                       \
513                 ALIGN_FUNCTION();                                       \
514                 *(.text.hot TEXT_MAIN .text.fixup .text.unlikely)       \
515                 *(.text..refcount)                                      \
516                 *(.ref.text)                                            \
517         MEM_KEEP(init.text*)                                            \
518         MEM_KEEP(exit.text*)                                            \
519
520
521 /* sched.text is aling to function alignment to secure we have same
522  * address even at second ld pass when generating System.map */
523 #define SCHED_TEXT                                                      \
524                 ALIGN_FUNCTION();                                       \
525                 __sched_text_start = .;                                 \
526                 *(.sched.text)                                          \
527                 __sched_text_end = .;
528
529 /* spinlock.text is aling to function alignment to secure we have same
530  * address even at second ld pass when generating System.map */
531 #define LOCK_TEXT                                                       \
532                 ALIGN_FUNCTION();                                       \
533                 __lock_text_start = .;                                  \
534                 *(.spinlock.text)                                       \
535                 __lock_text_end = .;
536
537 #define CPUIDLE_TEXT                                                    \
538                 ALIGN_FUNCTION();                                       \
539                 __cpuidle_text_start = .;                               \
540                 *(.cpuidle.text)                                        \
541                 __cpuidle_text_end = .;
542
543 #define KPROBES_TEXT                                                    \
544                 ALIGN_FUNCTION();                                       \
545                 __kprobes_text_start = .;                               \
546                 *(.kprobes.text)                                        \
547                 __kprobes_text_end = .;
548
549 #define ENTRY_TEXT                                                      \
550                 ALIGN_FUNCTION();                                       \
551                 __entry_text_start = .;                                 \
552                 *(.entry.text)                                          \
553                 __entry_text_end = .;
554
555 #define IRQENTRY_TEXT                                                   \
556                 ALIGN_FUNCTION();                                       \
557                 __irqentry_text_start = .;                              \
558                 *(.irqentry.text)                                       \
559                 __irqentry_text_end = .;
560
561 #define SOFTIRQENTRY_TEXT                                               \
562                 ALIGN_FUNCTION();                                       \
563                 __softirqentry_text_start = .;                          \
564                 *(.softirqentry.text)                                   \
565                 __softirqentry_text_end = .;
566
567 /* Section used for early init (in .S files) */
568 #define HEAD_TEXT  KEEP(*(.head.text))
569
570 #define HEAD_TEXT_SECTION                                                       \
571         .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) {               \
572                 HEAD_TEXT                                               \
573         }
574
575 /*
576  * Exception table
577  */
578 #define EXCEPTION_TABLE(align)                                          \
579         . = ALIGN(align);                                               \
580         __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {               \
581                 __start___ex_table = .;                                 \
582                 KEEP(*(__ex_table))                                     \
583                 __stop___ex_table = .;                                  \
584         }
585
586 /*
587  * Init task
588  */
589 #define INIT_TASK_DATA_SECTION(align)                                   \
590         . = ALIGN(align);                                               \
591         .data..init_task :  AT(ADDR(.data..init_task) - LOAD_OFFSET) {  \
592                 INIT_TASK_DATA(align)                                   \
593         }
594
595 #ifdef CONFIG_CONSTRUCTORS
596 #define KERNEL_CTORS()  . = ALIGN(8);                      \
597                         __ctors_start = .;                 \
598                         KEEP(*(.ctors))                    \
599                         KEEP(*(SORT(.init_array.*)))       \
600                         KEEP(*(.init_array))               \
601                         __ctors_end = .;
602 #else
603 #define KERNEL_CTORS()
604 #endif
605
606 /* init and exit section handling */
607 #define INIT_DATA                                                       \
608         KEEP(*(SORT(___kentry+*)))                                      \
609         *(.init.data init.data.*)                                       \
610         MEM_DISCARD(init.data*)                                         \
611         KERNEL_CTORS()                                                  \
612         MCOUNT_REC()                                                    \
613         *(.init.rodata .init.rodata.*)                                  \
614         FTRACE_EVENTS()                                                 \
615         TRACE_SYSCALLS()                                                \
616         KPROBE_BLACKLIST()                                              \
617         ERROR_INJECT_WHITELIST()                                        \
618         MEM_DISCARD(init.rodata)                                        \
619         CLK_OF_TABLES()                                                 \
620         RESERVEDMEM_OF_TABLES()                                         \
621         TIMER_OF_TABLES()                                               \
622         CPU_METHOD_OF_TABLES()                                          \
623         CPUIDLE_METHOD_OF_TABLES()                                      \
624         KERNEL_DTB()                                                    \
625         IRQCHIP_OF_MATCH_TABLE()                                        \
626         ACPI_PROBE_TABLE(irqchip)                                       \
627         ACPI_PROBE_TABLE(timer)                                         \
628         THERMAL_TABLE(governor)                                         \
629         EARLYCON_TABLE()                                                \
630         LSM_TABLE()
631
632 #define INIT_TEXT                                                       \
633         *(.init.text .init.text.*)                                      \
634         *(.text.startup)                                                \
635         MEM_DISCARD(init.text*)
636
637 #define EXIT_DATA                                                       \
638         *(.exit.data .exit.data.*)                                      \
639         *(.fini_array .fini_array.*)                                    \
640         *(.dtors .dtors.*)                                              \
641         MEM_DISCARD(exit.data*)                                         \
642         MEM_DISCARD(exit.rodata*)
643
644 #define EXIT_TEXT                                                       \
645         *(.exit.text)                                                   \
646         *(.text.exit)                                                   \
647         MEM_DISCARD(exit.text)
648
649 #define EXIT_CALL                                                       \
650         *(.exitcall.exit)
651
652 /*
653  * bss (Block Started by Symbol) - uninitialized data
654  * zeroed during startup
655  */
656 #define SBSS(sbss_align)                                                \
657         . = ALIGN(sbss_align);                                          \
658         .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) {                         \
659                 *(.dynsbss)                                             \
660                 *(SBSS_MAIN)                                            \
661                 *(.scommon)                                             \
662         }
663
664 /*
665  * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra
666  * sections to the front of bss.
667  */
668 #ifndef BSS_FIRST_SECTIONS
669 #define BSS_FIRST_SECTIONS
670 #endif
671
672 #define BSS(bss_align)                                                  \
673         . = ALIGN(bss_align);                                           \
674         .bss : AT(ADDR(.bss) - LOAD_OFFSET) {                           \
675                 BSS_FIRST_SECTIONS                                      \
676                 *(.bss..page_aligned)                                   \
677                 *(.dynbss)                                              \
678                 *(BSS_MAIN)                                             \
679                 *(COMMON)                                               \
680         }
681
682 /*
683  * DWARF debug sections.
684  * Symbols in the DWARF debugging sections are relative to
685  * the beginning of the section so we begin them at 0.
686  */
687 #define DWARF_DEBUG                                                     \
688                 /* DWARF 1 */                                           \
689                 .debug          0 : { *(.debug) }                       \
690                 .line           0 : { *(.line) }                        \
691                 /* GNU DWARF 1 extensions */                            \
692                 .debug_srcinfo  0 : { *(.debug_srcinfo) }               \
693                 .debug_sfnames  0 : { *(.debug_sfnames) }               \
694                 /* DWARF 1.1 and DWARF 2 */                             \
695                 .debug_aranges  0 : { *(.debug_aranges) }               \
696                 .debug_pubnames 0 : { *(.debug_pubnames) }              \
697                 /* DWARF 2 */                                           \
698                 .debug_info     0 : { *(.debug_info                     \
699                                 .gnu.linkonce.wi.*) }                   \
700                 .debug_abbrev   0 : { *(.debug_abbrev) }                \
701                 .debug_line     0 : { *(.debug_line) }                  \
702                 .debug_frame    0 : { *(.debug_frame) }                 \
703                 .debug_str      0 : { *(.debug_str) }                   \
704                 .debug_loc      0 : { *(.debug_loc) }                   \
705                 .debug_macinfo  0 : { *(.debug_macinfo) }               \
706                 .debug_pubtypes 0 : { *(.debug_pubtypes) }              \
707                 /* DWARF 3 */                                           \
708                 .debug_ranges   0 : { *(.debug_ranges) }                \
709                 /* SGI/MIPS DWARF 2 extensions */                       \
710                 .debug_weaknames 0 : { *(.debug_weaknames) }            \
711                 .debug_funcnames 0 : { *(.debug_funcnames) }            \
712                 .debug_typenames 0 : { *(.debug_typenames) }            \
713                 .debug_varnames  0 : { *(.debug_varnames) }             \
714                 /* GNU DWARF 2 extensions */                            \
715                 .debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) }      \
716                 .debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) }      \
717                 /* DWARF 4 */                                           \
718                 .debug_types    0 : { *(.debug_types) }                 \
719                 /* DWARF 5 */                                           \
720                 .debug_macro    0 : { *(.debug_macro) }                 \
721                 .debug_addr     0 : { *(.debug_addr) }
722
723                 /* Stabs debugging sections.  */
724 #define STABS_DEBUG                                                     \
725                 .stab 0 : { *(.stab) }                                  \
726                 .stabstr 0 : { *(.stabstr) }                            \
727                 .stab.excl 0 : { *(.stab.excl) }                        \
728                 .stab.exclstr 0 : { *(.stab.exclstr) }                  \
729                 .stab.index 0 : { *(.stab.index) }                      \
730                 .stab.indexstr 0 : { *(.stab.indexstr) }                \
731                 .comment 0 : { *(.comment) }
732
733 #ifdef CONFIG_GENERIC_BUG
734 #define BUG_TABLE                                                       \
735         . = ALIGN(8);                                                   \
736         __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) {             \
737                 __start___bug_table = .;                                \
738                 KEEP(*(__bug_table))                                    \
739                 __stop___bug_table = .;                                 \
740         }
741 #else
742 #define BUG_TABLE
743 #endif
744
745 #ifdef CONFIG_UNWINDER_ORC
746 #define ORC_UNWIND_TABLE                                                \
747         . = ALIGN(4);                                                   \
748         .orc_unwind_ip : AT(ADDR(.orc_unwind_ip) - LOAD_OFFSET) {       \
749                 __start_orc_unwind_ip = .;                              \
750                 KEEP(*(.orc_unwind_ip))                                 \
751                 __stop_orc_unwind_ip = .;                               \
752         }                                                               \
753         . = ALIGN(2);                                                   \
754         .orc_unwind : AT(ADDR(.orc_unwind) - LOAD_OFFSET) {             \
755                 __start_orc_unwind = .;                                 \
756                 KEEP(*(.orc_unwind))                                    \
757                 __stop_orc_unwind = .;                                  \
758         }                                                               \
759         . = ALIGN(4);                                                   \
760         .orc_lookup : AT(ADDR(.orc_lookup) - LOAD_OFFSET) {             \
761                 orc_lookup = .;                                         \
762                 . += (((SIZEOF(.text) + LOOKUP_BLOCK_SIZE - 1) /        \
763                         LOOKUP_BLOCK_SIZE) + 1) * 4;                    \
764                 orc_lookup_end = .;                                     \
765         }
766 #else
767 #define ORC_UNWIND_TABLE
768 #endif
769
770 #ifdef CONFIG_PM_TRACE
771 #define TRACEDATA                                                       \
772         . = ALIGN(4);                                                   \
773         .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) {               \
774                 __tracedata_start = .;                                  \
775                 KEEP(*(.tracedata))                                     \
776                 __tracedata_end = .;                                    \
777         }
778 #else
779 #define TRACEDATA
780 #endif
781
782 #define NOTES                                                           \
783         .notes : AT(ADDR(.notes) - LOAD_OFFSET) {                       \
784                 __start_notes = .;                                      \
785                 KEEP(*(.note.*))                                        \
786                 __stop_notes = .;                                       \
787         }
788
789 #define INIT_SETUP(initsetup_align)                                     \
790                 . = ALIGN(initsetup_align);                             \
791                 __setup_start = .;                                      \
792                 KEEP(*(.init.setup))                                    \
793                 __setup_end = .;
794
795 #define INIT_CALLS_LEVEL(level)                                         \
796                 __initcall##level##_start = .;                          \
797                 KEEP(*(.initcall##level##.init))                        \
798                 KEEP(*(.initcall##level##s.init))                       \
799
800 #define INIT_CALLS                                                      \
801                 __initcall_start = .;                                   \
802                 KEEP(*(.initcallearly.init))                            \
803                 INIT_CALLS_LEVEL(0)                                     \
804                 INIT_CALLS_LEVEL(1)                                     \
805                 INIT_CALLS_LEVEL(2)                                     \
806                 INIT_CALLS_LEVEL(3)                                     \
807                 INIT_CALLS_LEVEL(4)                                     \
808                 INIT_CALLS_LEVEL(5)                                     \
809                 INIT_CALLS_LEVEL(rootfs)                                \
810                 INIT_CALLS_LEVEL(6)                                     \
811                 INIT_CALLS_LEVEL(7)                                     \
812                 __initcall_end = .;
813
814 #define CON_INITCALL                                                    \
815                 __con_initcall_start = .;                               \
816                 KEEP(*(.con_initcall.init))                             \
817                 __con_initcall_end = .;
818
819 #ifdef CONFIG_BLK_DEV_INITRD
820 #define INIT_RAM_FS                                                     \
821         . = ALIGN(4);                                                   \
822         __initramfs_start = .;                                          \
823         KEEP(*(.init.ramfs))                                            \
824         . = ALIGN(8);                                                   \
825         KEEP(*(.init.ramfs.info))
826 #else
827 #define INIT_RAM_FS
828 #endif
829
830 /*
831  * Memory encryption operates on a page basis. Since we need to clear
832  * the memory encryption mask for this section, it needs to be aligned
833  * on a page boundary and be a page-size multiple in length.
834  *
835  * Note: We use a separate section so that only this section gets
836  * decrypted to avoid exposing more than we wish.
837  */
838 #ifdef CONFIG_AMD_MEM_ENCRYPT
839 #define PERCPU_DECRYPTED_SECTION                                        \
840         . = ALIGN(PAGE_SIZE);                                           \
841         *(.data..percpu..decrypted)                                     \
842         . = ALIGN(PAGE_SIZE);
843 #else
844 #define PERCPU_DECRYPTED_SECTION
845 #endif
846
847
848 /*
849  * Default discarded sections.
850  *
851  * Some archs want to discard exit text/data at runtime rather than
852  * link time due to cross-section references such as alt instructions,
853  * bug table, eh_frame, etc.  DISCARDS must be the last of output
854  * section definitions so that such archs put those in earlier section
855  * definitions.
856  */
857 #define DISCARDS                                                        \
858         /DISCARD/ : {                                                   \
859         EXIT_TEXT                                                       \
860         EXIT_DATA                                                       \
861         EXIT_CALL                                                       \
862         *(.discard)                                                     \
863         *(.discard.*)                                                   \
864         *(.modinfo)                                                     \
865         }
866
867 /**
868  * PERCPU_INPUT - the percpu input sections
869  * @cacheline: cacheline size
870  *
871  * The core percpu section names and core symbols which do not rely
872  * directly upon load addresses.
873  *
874  * @cacheline is used to align subsections to avoid false cacheline
875  * sharing between subsections for different purposes.
876  */
877 #define PERCPU_INPUT(cacheline)                                         \
878         __per_cpu_start = .;                                            \
879         *(.data..percpu..first)                                         \
880         . = ALIGN(PAGE_SIZE);                                           \
881         *(.data..percpu..page_aligned)                                  \
882         . = ALIGN(cacheline);                                           \
883         *(.data..percpu..read_mostly)                                   \
884         . = ALIGN(cacheline);                                           \
885         *(.data..percpu)                                                \
886         *(.data..percpu..shared_aligned)                                \
887         PERCPU_DECRYPTED_SECTION                                        \
888         __per_cpu_end = .;
889
890 /**
891  * PERCPU_VADDR - define output section for percpu area
892  * @cacheline: cacheline size
893  * @vaddr: explicit base address (optional)
894  * @phdr: destination PHDR (optional)
895  *
896  * Macro which expands to output section for percpu area.
897  *
898  * @cacheline is used to align subsections to avoid false cacheline
899  * sharing between subsections for different purposes.
900  *
901  * If @vaddr is not blank, it specifies explicit base address and all
902  * percpu symbols will be offset from the given address.  If blank,
903  * @vaddr always equals @laddr + LOAD_OFFSET.
904  *
905  * @phdr defines the output PHDR to use if not blank.  Be warned that
906  * output PHDR is sticky.  If @phdr is specified, the next output
907  * section in the linker script will go there too.  @phdr should have
908  * a leading colon.
909  *
910  * Note that this macros defines __per_cpu_load as an absolute symbol.
911  * If there is no need to put the percpu section at a predetermined
912  * address, use PERCPU_SECTION.
913  */
914 #define PERCPU_VADDR(cacheline, vaddr, phdr)                            \
915         __per_cpu_load = .;                                             \
916         .data..percpu vaddr : AT(__per_cpu_load - LOAD_OFFSET) {        \
917                 PERCPU_INPUT(cacheline)                                 \
918         } phdr                                                          \
919         . = __per_cpu_load + SIZEOF(.data..percpu);
920
921 /**
922  * PERCPU_SECTION - define output section for percpu area, simple version
923  * @cacheline: cacheline size
924  *
925  * Align to PAGE_SIZE and outputs output section for percpu area.  This
926  * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and
927  * __per_cpu_start will be identical.
928  *
929  * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,)
930  * except that __per_cpu_load is defined as a relative symbol against
931  * .data..percpu which is required for relocatable x86_32 configuration.
932  */
933 #define PERCPU_SECTION(cacheline)                                       \
934         . = ALIGN(PAGE_SIZE);                                           \
935         .data..percpu   : AT(ADDR(.data..percpu) - LOAD_OFFSET) {       \
936                 __per_cpu_load = .;                                     \
937                 PERCPU_INPUT(cacheline)                                 \
938         }
939
940
941 /*
942  * Definition of the high level *_SECTION macros
943  * They will fit only a subset of the architectures
944  */
945
946
947 /*
948  * Writeable data.
949  * All sections are combined in a single .data section.
950  * The sections following CONSTRUCTORS are arranged so their
951  * typical alignment matches.
952  * A cacheline is typical/always less than a PAGE_SIZE so
953  * the sections that has this restriction (or similar)
954  * is located before the ones requiring PAGE_SIZE alignment.
955  * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
956  * matches the requirement of PAGE_ALIGNED_DATA.
957  *
958  * use 0 as page_align if page_aligned data is not used */
959 #define RW_DATA_SECTION(cacheline, pagealigned, inittask)               \
960         . = ALIGN(PAGE_SIZE);                                           \
961         .data : AT(ADDR(.data) - LOAD_OFFSET) {                         \
962                 INIT_TASK_DATA(inittask)                                \
963                 NOSAVE_DATA                                             \
964                 PAGE_ALIGNED_DATA(pagealigned)                          \
965                 CACHELINE_ALIGNED_DATA(cacheline)                       \
966                 READ_MOSTLY_DATA(cacheline)                             \
967                 DATA_DATA                                               \
968                 CONSTRUCTORS                                            \
969         }                                                               \
970         BUG_TABLE                                                       \
971
972 #define INIT_TEXT_SECTION(inittext_align)                               \
973         . = ALIGN(inittext_align);                                      \
974         .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {               \
975                 _sinittext = .;                                         \
976                 INIT_TEXT                                               \
977                 _einittext = .;                                         \
978         }
979
980 #define INIT_DATA_SECTION(initsetup_align)                              \
981         .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {               \
982                 INIT_DATA                                               \
983                 INIT_SETUP(initsetup_align)                             \
984                 INIT_CALLS                                              \
985                 CON_INITCALL                                            \
986                 INIT_RAM_FS                                             \
987         }
988
989 #define BSS_SECTION(sbss_align, bss_align, stop_align)                  \
990         . = ALIGN(sbss_align);                                          \
991         __bss_start = .;                                                \
992         SBSS(sbss_align)                                                \
993         BSS(bss_align)                                                  \
994         . = ALIGN(stop_align);                                          \
995         __bss_stop = .;