Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[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 #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                                 KEEP(*(_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                         KEEP(*(_ftrace_events))                         \
127                         VMLINUX_SYMBOL(__stop_ftrace_events) = .;       \
128                         VMLINUX_SYMBOL(__start_ftrace_enum_maps) = .;   \
129                         KEEP(*(_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                          KEEP(*(__trace_printk_fmt)) /* Trace_printk fmt' pointer */ \
138                          VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .;
139 #define TRACEPOINT_STR() VMLINUX_SYMBOL(__start___tracepoint_str) = .;  \
140                          KEEP(*(__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                          KEEP(*(__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                          KEEP(*(__earlycon_table))              \
160                          VMLINUX_SYMBOL(__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(IS_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         KEEP(*(__##name##_of_table))                                    \
173         KEEP(*(__##name##_of_table_end))
174
175 #define CLKSRC_OF_TABLES()      OF_TABLE(CONFIG_CLKSRC_OF, clksrc)
176 #define CLKEVT_OF_TABLES()      OF_TABLE(CONFIG_CLKEVT_OF, clkevt)
177 #define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip)
178 #define CLK_OF_TABLES()         OF_TABLE(CONFIG_COMMON_CLK, clk)
179 #define IOMMU_OF_TABLES()       OF_TABLE(CONFIG_OF_IOMMU, iommu)
180 #define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem)
181 #define CPU_METHOD_OF_TABLES()  OF_TABLE(CONFIG_SMP, cpu_method)
182 #define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method)
183
184 #ifdef CONFIG_ACPI
185 #define ACPI_PROBE_TABLE(name)                                          \
186         . = ALIGN(8);                                                   \
187         VMLINUX_SYMBOL(__##name##_acpi_probe_table) = .;                \
188         KEEP(*(__##name##_acpi_probe_table))                            \
189         VMLINUX_SYMBOL(__##name##_acpi_probe_table_end) = .;
190 #else
191 #define ACPI_PROBE_TABLE(name)
192 #endif
193
194 #define KERNEL_DTB()                                                    \
195         STRUCT_ALIGN();                                                 \
196         VMLINUX_SYMBOL(__dtb_start) = .;                                \
197         KEEP(*(.dtb.init.rodata))                                       \
198         VMLINUX_SYMBOL(__dtb_end) = .;
199
200 /*
201  * .data section
202  * LD_DEAD_CODE_DATA_ELIMINATION option enables -fdata-sections generates
203  * .data.identifier which needs to be pulled in with .data, but don't want to
204  * pull in .data..stuff which has its own requirements. Same for bss.
205  */
206 #define DATA_DATA                                                       \
207         *(.data .data.[0-9a-zA-Z_]*)                                    \
208         *(.ref.data)                                                    \
209         *(.data..shared_aligned) /* percpu related */                   \
210         MEM_KEEP(init.data)                                             \
211         MEM_KEEP(exit.data)                                             \
212         *(.data.unlikely)                                               \
213         STRUCT_ALIGN();                                                 \
214         *(__tracepoints)                                                \
215         /* implement dynamic printk debug */                            \
216         . = ALIGN(8);                                                   \
217         VMLINUX_SYMBOL(__start___jump_table) = .;                       \
218         KEEP(*(__jump_table))                                           \
219         VMLINUX_SYMBOL(__stop___jump_table) = .;                        \
220         . = ALIGN(8);                                                   \
221         VMLINUX_SYMBOL(__start___verbose) = .;                          \
222         KEEP(*(__verbose))                                              \
223         VMLINUX_SYMBOL(__stop___verbose) = .;                           \
224         LIKELY_PROFILE()                                                \
225         BRANCH_PROFILE()                                                \
226         TRACE_PRINTKS()                                                 \
227         TRACEPOINT_STR()
228
229 /*
230  * Data section helpers
231  */
232 #define NOSAVE_DATA                                                     \
233         . = ALIGN(PAGE_SIZE);                                           \
234         VMLINUX_SYMBOL(__nosave_begin) = .;                             \
235         *(.data..nosave)                                                \
236         . = ALIGN(PAGE_SIZE);                                           \
237         VMLINUX_SYMBOL(__nosave_end) = .;
238
239 #define PAGE_ALIGNED_DATA(page_align)                                   \
240         . = ALIGN(page_align);                                          \
241         *(.data..page_aligned)
242
243 #define READ_MOSTLY_DATA(align)                                         \
244         . = ALIGN(align);                                               \
245         *(.data..read_mostly)                                           \
246         . = ALIGN(align);
247
248 #define CACHELINE_ALIGNED_DATA(align)                                   \
249         . = ALIGN(align);                                               \
250         *(.data..cacheline_aligned)
251
252 #define INIT_TASK_DATA(align)                                           \
253         . = ALIGN(align);                                               \
254         VMLINUX_SYMBOL(__start_init_task) = .;                          \
255         *(.data..init_task)                                             \
256         VMLINUX_SYMBOL(__end_init_task) = .;
257
258 /*
259  * Allow architectures to handle ro_after_init data on their
260  * own by defining an empty RO_AFTER_INIT_DATA.
261  */
262 #ifndef RO_AFTER_INIT_DATA
263 #define RO_AFTER_INIT_DATA                                              \
264         __start_ro_after_init = .;                                      \
265         *(.data..ro_after_init)                                         \
266         __end_ro_after_init = .;
267 #endif
268
269 /*
270  * Read only Data
271  */
272 #define RO_DATA_SECTION(align)                                          \
273         . = ALIGN((align));                                             \
274         .rodata           : AT(ADDR(.rodata) - LOAD_OFFSET) {           \
275                 VMLINUX_SYMBOL(__start_rodata) = .;                     \
276                 *(.rodata) *(.rodata.*)                                 \
277                 RO_AFTER_INIT_DATA      /* Read only after init */      \
278                 KEEP(*(__vermagic))     /* Kernel version magic */      \
279                 . = ALIGN(8);                                           \
280                 VMLINUX_SYMBOL(__start___tracepoints_ptrs) = .;         \
281                 KEEP(*(__tracepoints_ptrs)) /* Tracepoints: pointer array */ \
282                 VMLINUX_SYMBOL(__stop___tracepoints_ptrs) = .;          \
283                 *(__tracepoints_strings)/* Tracepoints: strings */      \
284         }                                                               \
285                                                                         \
286         .rodata1          : AT(ADDR(.rodata1) - LOAD_OFFSET) {          \
287                 *(.rodata1)                                             \
288         }                                                               \
289                                                                         \
290         BUG_TABLE                                                       \
291                                                                         \
292         /* PCI quirks */                                                \
293         .pci_fixup        : AT(ADDR(.pci_fixup) - LOAD_OFFSET) {        \
294                 VMLINUX_SYMBOL(__start_pci_fixups_early) = .;           \
295                 KEEP(*(.pci_fixup_early))                               \
296                 VMLINUX_SYMBOL(__end_pci_fixups_early) = .;             \
297                 VMLINUX_SYMBOL(__start_pci_fixups_header) = .;          \
298                 KEEP(*(.pci_fixup_header))                              \
299                 VMLINUX_SYMBOL(__end_pci_fixups_header) = .;            \
300                 VMLINUX_SYMBOL(__start_pci_fixups_final) = .;           \
301                 KEEP(*(.pci_fixup_final))                               \
302                 VMLINUX_SYMBOL(__end_pci_fixups_final) = .;             \
303                 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .;          \
304                 KEEP(*(.pci_fixup_enable))                              \
305                 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .;            \
306                 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .;          \
307                 KEEP(*(.pci_fixup_resume))                              \
308                 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .;            \
309                 VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .;    \
310                 KEEP(*(.pci_fixup_resume_early))                        \
311                 VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .;      \
312                 VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .;         \
313                 KEEP(*(.pci_fixup_suspend))                             \
314                 VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .;           \
315                 VMLINUX_SYMBOL(__start_pci_fixups_suspend_late) = .;    \
316                 KEEP(*(.pci_fixup_suspend_late))                        \
317                 VMLINUX_SYMBOL(__end_pci_fixups_suspend_late) = .;      \
318         }                                                               \
319                                                                         \
320         /* Built-in firmware blobs */                                   \
321         .builtin_fw        : AT(ADDR(.builtin_fw) - LOAD_OFFSET) {      \
322                 VMLINUX_SYMBOL(__start_builtin_fw) = .;                 \
323                 KEEP(*(.builtin_fw))                                    \
324                 VMLINUX_SYMBOL(__end_builtin_fw) = .;                   \
325         }                                                               \
326                                                                         \
327         TRACEDATA                                                       \
328                                                                         \
329         /* Kernel symbol table: Normal symbols */                       \
330         __ksymtab         : AT(ADDR(__ksymtab) - LOAD_OFFSET) {         \
331                 VMLINUX_SYMBOL(__start___ksymtab) = .;                  \
332                 KEEP(*(SORT(___ksymtab+*)))                             \
333                 VMLINUX_SYMBOL(__stop___ksymtab) = .;                   \
334         }                                                               \
335                                                                         \
336         /* Kernel symbol table: GPL-only symbols */                     \
337         __ksymtab_gpl     : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) {     \
338                 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .;              \
339                 KEEP(*(SORT(___ksymtab_gpl+*)))                         \
340                 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .;               \
341         }                                                               \
342                                                                         \
343         /* Kernel symbol table: Normal unused symbols */                \
344         __ksymtab_unused  : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) {  \
345                 VMLINUX_SYMBOL(__start___ksymtab_unused) = .;           \
346                 KEEP(*(SORT(___ksymtab_unused+*)))                      \
347                 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .;            \
348         }                                                               \
349                                                                         \
350         /* Kernel symbol table: GPL-only unused symbols */              \
351         __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
352                 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .;       \
353                 KEEP(*(SORT(___ksymtab_unused_gpl+*)))                  \
354                 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .;        \
355         }                                                               \
356                                                                         \
357         /* Kernel symbol table: GPL-future-only symbols */              \
358         __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
359                 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .;       \
360                 KEEP(*(SORT(___ksymtab_gpl_future+*)))                  \
361                 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .;        \
362         }                                                               \
363                                                                         \
364         /* Kernel symbol table: Normal symbols */                       \
365         __kcrctab         : AT(ADDR(__kcrctab) - LOAD_OFFSET) {         \
366                 VMLINUX_SYMBOL(__start___kcrctab) = .;                  \
367                 KEEP(*(SORT(___kcrctab+*)))                             \
368                 VMLINUX_SYMBOL(__stop___kcrctab) = .;                   \
369         }                                                               \
370                                                                         \
371         /* Kernel symbol table: GPL-only symbols */                     \
372         __kcrctab_gpl     : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) {     \
373                 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .;              \
374                 KEEP(*(SORT(___kcrctab_gpl+*)))                         \
375                 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .;               \
376         }                                                               \
377                                                                         \
378         /* Kernel symbol table: Normal unused symbols */                \
379         __kcrctab_unused  : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) {  \
380                 VMLINUX_SYMBOL(__start___kcrctab_unused) = .;           \
381                 KEEP(*(SORT(___kcrctab_unused+*)))                      \
382                 VMLINUX_SYMBOL(__stop___kcrctab_unused) = .;            \
383         }                                                               \
384                                                                         \
385         /* Kernel symbol table: GPL-only unused symbols */              \
386         __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
387                 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .;       \
388                 KEEP(*(SORT(___kcrctab_unused_gpl+*)))                  \
389                 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .;        \
390         }                                                               \
391                                                                         \
392         /* Kernel symbol table: GPL-future-only symbols */              \
393         __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
394                 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .;       \
395                 KEEP(*(SORT(___kcrctab_gpl_future+*)))                  \
396                 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .;        \
397         }                                                               \
398                                                                         \
399         /* Kernel symbol table: strings */                              \
400         __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
401                 *(__ksymtab_strings)                                    \
402         }                                                               \
403                                                                         \
404         /* __*init sections */                                          \
405         __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) {         \
406                 *(.ref.rodata)                                          \
407                 MEM_KEEP(init.rodata)                                   \
408                 MEM_KEEP(exit.rodata)                                   \
409         }                                                               \
410                                                                         \
411         /* Built-in module parameters. */                               \
412         __param : AT(ADDR(__param) - LOAD_OFFSET) {                     \
413                 VMLINUX_SYMBOL(__start___param) = .;                    \
414                 KEEP(*(__param))                                        \
415                 VMLINUX_SYMBOL(__stop___param) = .;                     \
416         }                                                               \
417                                                                         \
418         /* Built-in module versions. */                                 \
419         __modver : AT(ADDR(__modver) - LOAD_OFFSET) {                   \
420                 VMLINUX_SYMBOL(__start___modver) = .;                   \
421                 KEEP(*(__modver))                                       \
422                 VMLINUX_SYMBOL(__stop___modver) = .;                    \
423                 . = ALIGN((align));                                     \
424                 VMLINUX_SYMBOL(__end_rodata) = .;                       \
425         }                                                               \
426         . = ALIGN((align));
427
428 /* RODATA & RO_DATA provided for backward compatibility.
429  * All archs are supposed to use RO_DATA() */
430 #define RODATA          RO_DATA_SECTION(4096)
431 #define RO_DATA(align)  RO_DATA_SECTION(align)
432
433 #define SECURITY_INIT                                                   \
434         .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
435                 VMLINUX_SYMBOL(__security_initcall_start) = .;          \
436                 KEEP(*(.security_initcall.init))                        \
437                 VMLINUX_SYMBOL(__security_initcall_end) = .;            \
438         }
439
440 /* .text section. Map to function alignment to avoid address changes
441  * during second ld run in second ld pass when generating System.map
442  * LD_DEAD_CODE_DATA_ELIMINATION option enables -ffunction-sections generates
443  * .text.identifier which needs to be pulled in with .text , but some
444  * architectures define .text.foo which is not intended to be pulled in here.
445  * Those enabling LD_DEAD_CODE_DATA_ELIMINATION must ensure they don't have
446  * conflicting section names, and must pull in .text.[0-9a-zA-Z_]* */
447 #define TEXT_TEXT                                                       \
448                 ALIGN_FUNCTION();                                       \
449                 *(.text.hot .text .text.fixup .text.unlikely)           \
450                 *(.ref.text)                                            \
451         MEM_KEEP(init.text)                                             \
452         MEM_KEEP(exit.text)                                             \
453
454
455 /* sched.text is aling to function alignment to secure we have same
456  * address even at second ld pass when generating System.map */
457 #define SCHED_TEXT                                                      \
458                 ALIGN_FUNCTION();                                       \
459                 VMLINUX_SYMBOL(__sched_text_start) = .;                 \
460                 *(.sched.text)                                          \
461                 VMLINUX_SYMBOL(__sched_text_end) = .;
462
463 /* spinlock.text is aling to function alignment to secure we have same
464  * address even at second ld pass when generating System.map */
465 #define LOCK_TEXT                                                       \
466                 ALIGN_FUNCTION();                                       \
467                 VMLINUX_SYMBOL(__lock_text_start) = .;                  \
468                 *(.spinlock.text)                                       \
469                 VMLINUX_SYMBOL(__lock_text_end) = .;
470
471 #define CPUIDLE_TEXT                                                    \
472                 ALIGN_FUNCTION();                                       \
473                 VMLINUX_SYMBOL(__cpuidle_text_start) = .;               \
474                 *(.cpuidle.text)                                        \
475                 VMLINUX_SYMBOL(__cpuidle_text_end) = .;
476
477 #define KPROBES_TEXT                                                    \
478                 ALIGN_FUNCTION();                                       \
479                 VMLINUX_SYMBOL(__kprobes_text_start) = .;               \
480                 *(.kprobes.text)                                        \
481                 VMLINUX_SYMBOL(__kprobes_text_end) = .;
482
483 #define ENTRY_TEXT                                                      \
484                 ALIGN_FUNCTION();                                       \
485                 VMLINUX_SYMBOL(__entry_text_start) = .;                 \
486                 *(.entry.text)                                          \
487                 VMLINUX_SYMBOL(__entry_text_end) = .;
488
489 #if defined(CONFIG_FUNCTION_GRAPH_TRACER) || defined(CONFIG_KASAN)
490 #define IRQENTRY_TEXT                                                   \
491                 ALIGN_FUNCTION();                                       \
492                 VMLINUX_SYMBOL(__irqentry_text_start) = .;              \
493                 *(.irqentry.text)                                       \
494                 VMLINUX_SYMBOL(__irqentry_text_end) = .;
495 #else
496 #define IRQENTRY_TEXT
497 #endif
498
499 #if defined(CONFIG_FUNCTION_GRAPH_TRACER) || defined(CONFIG_KASAN)
500 #define SOFTIRQENTRY_TEXT                                               \
501                 ALIGN_FUNCTION();                                       \
502                 VMLINUX_SYMBOL(__softirqentry_text_start) = .;          \
503                 *(.softirqentry.text)                                   \
504                 VMLINUX_SYMBOL(__softirqentry_text_end) = .;
505 #else
506 #define SOFTIRQENTRY_TEXT
507 #endif
508
509 /* Section used for early init (in .S files) */
510 #define HEAD_TEXT  *(.head.text)
511
512 #define HEAD_TEXT_SECTION                                                       \
513         .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) {               \
514                 HEAD_TEXT                                               \
515         }
516
517 /*
518  * Exception table
519  */
520 #define EXCEPTION_TABLE(align)                                          \
521         . = ALIGN(align);                                               \
522         __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {               \
523                 VMLINUX_SYMBOL(__start___ex_table) = .;                 \
524                 KEEP(*(__ex_table))                                     \
525                 VMLINUX_SYMBOL(__stop___ex_table) = .;                  \
526         }
527
528 /*
529  * Init task
530  */
531 #define INIT_TASK_DATA_SECTION(align)                                   \
532         . = ALIGN(align);                                               \
533         .data..init_task :  AT(ADDR(.data..init_task) - LOAD_OFFSET) {  \
534                 INIT_TASK_DATA(align)                                   \
535         }
536
537 #ifdef CONFIG_CONSTRUCTORS
538 #define KERNEL_CTORS()  . = ALIGN(8);                      \
539                         VMLINUX_SYMBOL(__ctors_start) = .; \
540                         KEEP(*(.ctors))                    \
541                         KEEP(*(SORT(.init_array.*)))       \
542                         KEEP(*(.init_array))               \
543                         VMLINUX_SYMBOL(__ctors_end) = .;
544 #else
545 #define KERNEL_CTORS()
546 #endif
547
548 /* init and exit section handling */
549 #define INIT_DATA                                                       \
550         KEEP(*(SORT(___kentry+*)))                                      \
551         *(.init.data)                                                   \
552         MEM_DISCARD(init.data)                                          \
553         KERNEL_CTORS()                                                  \
554         MCOUNT_REC()                                                    \
555         *(.init.rodata)                                                 \
556         FTRACE_EVENTS()                                                 \
557         TRACE_SYSCALLS()                                                \
558         KPROBE_BLACKLIST()                                              \
559         MEM_DISCARD(init.rodata)                                        \
560         CLK_OF_TABLES()                                                 \
561         RESERVEDMEM_OF_TABLES()                                         \
562         CLKSRC_OF_TABLES()                                              \
563         CLKEVT_OF_TABLES()                                              \
564         IOMMU_OF_TABLES()                                               \
565         CPU_METHOD_OF_TABLES()                                          \
566         CPUIDLE_METHOD_OF_TABLES()                                      \
567         KERNEL_DTB()                                                    \
568         IRQCHIP_OF_MATCH_TABLE()                                        \
569         ACPI_PROBE_TABLE(irqchip)                                       \
570         ACPI_PROBE_TABLE(clksrc)                                        \
571         ACPI_PROBE_TABLE(iort)                                          \
572         EARLYCON_TABLE()
573
574 #define INIT_TEXT                                                       \
575         *(.init.text)                                                   \
576         *(.text.startup)                                                \
577         MEM_DISCARD(init.text)
578
579 #define EXIT_DATA                                                       \
580         *(.exit.data)                                                   \
581         *(.fini_array)                                                  \
582         *(.dtors)                                                       \
583         MEM_DISCARD(exit.data)                                          \
584         MEM_DISCARD(exit.rodata)
585
586 #define EXIT_TEXT                                                       \
587         *(.exit.text)                                                   \
588         *(.text.exit)                                                   \
589         MEM_DISCARD(exit.text)
590
591 #define EXIT_CALL                                                       \
592         *(.exitcall.exit)
593
594 /*
595  * bss (Block Started by Symbol) - uninitialized data
596  * zeroed during startup
597  */
598 #define SBSS(sbss_align)                                                \
599         . = ALIGN(sbss_align);                                          \
600         .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) {                         \
601                 *(.sbss)                                                \
602                 *(.scommon)                                             \
603         }
604
605 /*
606  * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra
607  * sections to the front of bss.
608  */
609 #ifndef BSS_FIRST_SECTIONS
610 #define BSS_FIRST_SECTIONS
611 #endif
612
613 #define BSS(bss_align)                                                  \
614         . = ALIGN(bss_align);                                           \
615         .bss : AT(ADDR(.bss) - LOAD_OFFSET) {                           \
616                 BSS_FIRST_SECTIONS                                      \
617                 *(.bss..page_aligned)                                   \
618                 *(.dynbss)                                              \
619                 *(.bss .bss.[0-9a-zA-Z_]*)                              \
620                 *(COMMON)                                               \
621         }
622
623 /*
624  * DWARF debug sections.
625  * Symbols in the DWARF debugging sections are relative to
626  * the beginning of the section so we begin them at 0.
627  */
628 #define DWARF_DEBUG                                                     \
629                 /* DWARF 1 */                                           \
630                 .debug          0 : { *(.debug) }                       \
631                 .line           0 : { *(.line) }                        \
632                 /* GNU DWARF 1 extensions */                            \
633                 .debug_srcinfo  0 : { *(.debug_srcinfo) }               \
634                 .debug_sfnames  0 : { *(.debug_sfnames) }               \
635                 /* DWARF 1.1 and DWARF 2 */                             \
636                 .debug_aranges  0 : { *(.debug_aranges) }               \
637                 .debug_pubnames 0 : { *(.debug_pubnames) }              \
638                 /* DWARF 2 */                                           \
639                 .debug_info     0 : { *(.debug_info                     \
640                                 .gnu.linkonce.wi.*) }                   \
641                 .debug_abbrev   0 : { *(.debug_abbrev) }                \
642                 .debug_line     0 : { *(.debug_line) }                  \
643                 .debug_frame    0 : { *(.debug_frame) }                 \
644                 .debug_str      0 : { *(.debug_str) }                   \
645                 .debug_loc      0 : { *(.debug_loc) }                   \
646                 .debug_macinfo  0 : { *(.debug_macinfo) }               \
647                 /* SGI/MIPS DWARF 2 extensions */                       \
648                 .debug_weaknames 0 : { *(.debug_weaknames) }            \
649                 .debug_funcnames 0 : { *(.debug_funcnames) }            \
650                 .debug_typenames 0 : { *(.debug_typenames) }            \
651                 .debug_varnames  0 : { *(.debug_varnames) }             \
652
653                 /* Stabs debugging sections.  */
654 #define STABS_DEBUG                                                     \
655                 .stab 0 : { *(.stab) }                                  \
656                 .stabstr 0 : { *(.stabstr) }                            \
657                 .stab.excl 0 : { *(.stab.excl) }                        \
658                 .stab.exclstr 0 : { *(.stab.exclstr) }                  \
659                 .stab.index 0 : { *(.stab.index) }                      \
660                 .stab.indexstr 0 : { *(.stab.indexstr) }                \
661                 .comment 0 : { *(.comment) }
662
663 #ifdef CONFIG_GENERIC_BUG
664 #define BUG_TABLE                                                       \
665         . = ALIGN(8);                                                   \
666         __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) {             \
667                 VMLINUX_SYMBOL(__start___bug_table) = .;                \
668                 KEEP(*(__bug_table))                                    \
669                 VMLINUX_SYMBOL(__stop___bug_table) = .;                 \
670         }
671 #else
672 #define BUG_TABLE
673 #endif
674
675 #ifdef CONFIG_PM_TRACE
676 #define TRACEDATA                                                       \
677         . = ALIGN(4);                                                   \
678         .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) {               \
679                 VMLINUX_SYMBOL(__tracedata_start) = .;                  \
680                 KEEP(*(.tracedata))                                     \
681                 VMLINUX_SYMBOL(__tracedata_end) = .;                    \
682         }
683 #else
684 #define TRACEDATA
685 #endif
686
687 #define NOTES                                                           \
688         .notes : AT(ADDR(.notes) - LOAD_OFFSET) {                       \
689                 VMLINUX_SYMBOL(__start_notes) = .;                      \
690                 *(.note.*)                                              \
691                 VMLINUX_SYMBOL(__stop_notes) = .;                       \
692         }
693
694 #define INIT_SETUP(initsetup_align)                                     \
695                 . = ALIGN(initsetup_align);                             \
696                 VMLINUX_SYMBOL(__setup_start) = .;                      \
697                 KEEP(*(.init.setup))                                    \
698                 VMLINUX_SYMBOL(__setup_end) = .;
699
700 #define INIT_CALLS_LEVEL(level)                                         \
701                 VMLINUX_SYMBOL(__initcall##level##_start) = .;          \
702                 KEEP(*(.initcall##level##.init))                        \
703                 KEEP(*(.initcall##level##s.init))                       \
704
705 #define INIT_CALLS                                                      \
706                 VMLINUX_SYMBOL(__initcall_start) = .;                   \
707                 KEEP(*(.initcallearly.init))                            \
708                 INIT_CALLS_LEVEL(0)                                     \
709                 INIT_CALLS_LEVEL(1)                                     \
710                 INIT_CALLS_LEVEL(2)                                     \
711                 INIT_CALLS_LEVEL(3)                                     \
712                 INIT_CALLS_LEVEL(4)                                     \
713                 INIT_CALLS_LEVEL(5)                                     \
714                 INIT_CALLS_LEVEL(rootfs)                                \
715                 INIT_CALLS_LEVEL(6)                                     \
716                 INIT_CALLS_LEVEL(7)                                     \
717                 VMLINUX_SYMBOL(__initcall_end) = .;
718
719 #define CON_INITCALL                                                    \
720                 VMLINUX_SYMBOL(__con_initcall_start) = .;               \
721                 KEEP(*(.con_initcall.init))                             \
722                 VMLINUX_SYMBOL(__con_initcall_end) = .;
723
724 #define SECURITY_INITCALL                                               \
725                 VMLINUX_SYMBOL(__security_initcall_start) = .;          \
726                 KEEP(*(.security_initcall.init))                        \
727                 VMLINUX_SYMBOL(__security_initcall_end) = .;
728
729 #ifdef CONFIG_BLK_DEV_INITRD
730 #define INIT_RAM_FS                                                     \
731         . = ALIGN(4);                                                   \
732         VMLINUX_SYMBOL(__initramfs_start) = .;                          \
733         KEEP(*(.init.ramfs))                                            \
734         . = ALIGN(8);                                                   \
735         KEEP(*(.init.ramfs.info))
736 #else
737 #define INIT_RAM_FS
738 #endif
739
740 /*
741  * Default discarded sections.
742  *
743  * Some archs want to discard exit text/data at runtime rather than
744  * link time due to cross-section references such as alt instructions,
745  * bug table, eh_frame, etc.  DISCARDS must be the last of output
746  * section definitions so that such archs put those in earlier section
747  * definitions.
748  */
749 #define DISCARDS                                                        \
750         /DISCARD/ : {                                                   \
751         EXIT_TEXT                                                       \
752         EXIT_DATA                                                       \
753         EXIT_CALL                                                       \
754         *(.discard)                                                     \
755         *(.discard.*)                                                   \
756         }
757
758 /**
759  * PERCPU_INPUT - the percpu input sections
760  * @cacheline: cacheline size
761  *
762  * The core percpu section names and core symbols which do not rely
763  * directly upon load addresses.
764  *
765  * @cacheline is used to align subsections to avoid false cacheline
766  * sharing between subsections for different purposes.
767  */
768 #define PERCPU_INPUT(cacheline)                                         \
769         VMLINUX_SYMBOL(__per_cpu_start) = .;                            \
770         *(.data..percpu..first)                                         \
771         . = ALIGN(PAGE_SIZE);                                           \
772         *(.data..percpu..page_aligned)                                  \
773         . = ALIGN(cacheline);                                           \
774         *(.data..percpu..read_mostly)                                   \
775         . = ALIGN(cacheline);                                           \
776         *(.data..percpu)                                                \
777         *(.data..percpu..shared_aligned)                                \
778         VMLINUX_SYMBOL(__per_cpu_end) = .;
779
780 /**
781  * PERCPU_VADDR - define output section for percpu area
782  * @cacheline: cacheline size
783  * @vaddr: explicit base address (optional)
784  * @phdr: destination PHDR (optional)
785  *
786  * Macro which expands to output section for percpu area.
787  *
788  * @cacheline is used to align subsections to avoid false cacheline
789  * sharing between subsections for different purposes.
790  *
791  * If @vaddr is not blank, it specifies explicit base address and all
792  * percpu symbols will be offset from the given address.  If blank,
793  * @vaddr always equals @laddr + LOAD_OFFSET.
794  *
795  * @phdr defines the output PHDR to use if not blank.  Be warned that
796  * output PHDR is sticky.  If @phdr is specified, the next output
797  * section in the linker script will go there too.  @phdr should have
798  * a leading colon.
799  *
800  * Note that this macros defines __per_cpu_load as an absolute symbol.
801  * If there is no need to put the percpu section at a predetermined
802  * address, use PERCPU_SECTION.
803  */
804 #define PERCPU_VADDR(cacheline, vaddr, phdr)                            \
805         VMLINUX_SYMBOL(__per_cpu_load) = .;                             \
806         .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load)         \
807                                 - LOAD_OFFSET) {                        \
808                 PERCPU_INPUT(cacheline)                                 \
809         } phdr                                                          \
810         . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu);
811
812 /**
813  * PERCPU_SECTION - define output section for percpu area, simple version
814  * @cacheline: cacheline size
815  *
816  * Align to PAGE_SIZE and outputs output section for percpu area.  This
817  * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and
818  * __per_cpu_start will be identical.
819  *
820  * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,)
821  * except that __per_cpu_load is defined as a relative symbol against
822  * .data..percpu which is required for relocatable x86_32 configuration.
823  */
824 #define PERCPU_SECTION(cacheline)                                       \
825         . = ALIGN(PAGE_SIZE);                                           \
826         .data..percpu   : AT(ADDR(.data..percpu) - LOAD_OFFSET) {       \
827                 VMLINUX_SYMBOL(__per_cpu_load) = .;                     \
828                 PERCPU_INPUT(cacheline)                                 \
829         }
830
831
832 /*
833  * Definition of the high level *_SECTION macros
834  * They will fit only a subset of the architectures
835  */
836
837
838 /*
839  * Writeable data.
840  * All sections are combined in a single .data section.
841  * The sections following CONSTRUCTORS are arranged so their
842  * typical alignment matches.
843  * A cacheline is typical/always less than a PAGE_SIZE so
844  * the sections that has this restriction (or similar)
845  * is located before the ones requiring PAGE_SIZE alignment.
846  * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
847  * matches the requirement of PAGE_ALIGNED_DATA.
848  *
849  * use 0 as page_align if page_aligned data is not used */
850 #define RW_DATA_SECTION(cacheline, pagealigned, inittask)               \
851         . = ALIGN(PAGE_SIZE);                                           \
852         .data : AT(ADDR(.data) - LOAD_OFFSET) {                         \
853                 INIT_TASK_DATA(inittask)                                \
854                 NOSAVE_DATA                                             \
855                 PAGE_ALIGNED_DATA(pagealigned)                          \
856                 CACHELINE_ALIGNED_DATA(cacheline)                       \
857                 READ_MOSTLY_DATA(cacheline)                             \
858                 DATA_DATA                                               \
859                 CONSTRUCTORS                                            \
860         }
861
862 #define INIT_TEXT_SECTION(inittext_align)                               \
863         . = ALIGN(inittext_align);                                      \
864         .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {               \
865                 VMLINUX_SYMBOL(_sinittext) = .;                         \
866                 INIT_TEXT                                               \
867                 VMLINUX_SYMBOL(_einittext) = .;                         \
868         }
869
870 #define INIT_DATA_SECTION(initsetup_align)                              \
871         .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {               \
872                 INIT_DATA                                               \
873                 INIT_SETUP(initsetup_align)                             \
874                 INIT_CALLS                                              \
875                 CON_INITCALL                                            \
876                 SECURITY_INITCALL                                       \
877                 INIT_RAM_FS                                             \
878         }
879
880 #define BSS_SECTION(sbss_align, bss_align, stop_align)                  \
881         . = ALIGN(sbss_align);                                          \
882         VMLINUX_SYMBOL(__bss_start) = .;                                \
883         SBSS(sbss_align)                                                \
884         BSS(bss_align)                                                  \
885         . = ALIGN(stop_align);                                          \
886         VMLINUX_SYMBOL(__bss_stop) = .;