Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64...
[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  * LD_DEAD_CODE_DATA_ELIMINATION option enables -fdata-sections, which
64  * generates .data.identifier sections, which need to be pulled in with
65  * .data. We don't want to pull in .data..other sections, which Linux
66  * has defined. Same for text and bss.
67  */
68 #ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
69 #define TEXT_MAIN .text .text.[0-9a-zA-Z_]*
70 #define DATA_MAIN .data .data.[0-9a-zA-Z_]*
71 #define BSS_MAIN .bss .bss.[0-9a-zA-Z_]*
72 #else
73 #define TEXT_MAIN .text
74 #define DATA_MAIN .data
75 #define BSS_MAIN .bss
76 #endif
77
78 /*
79  * Align to a 32 byte boundary equal to the
80  * alignment gcc 4.5 uses for a struct
81  */
82 #define STRUCT_ALIGNMENT 32
83 #define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT)
84
85 /* The actual configuration determine if the init/exit sections
86  * are handled as text/data or they can be discarded (which
87  * often happens at runtime)
88  */
89 #ifdef CONFIG_HOTPLUG_CPU
90 #define CPU_KEEP(sec)    *(.cpu##sec)
91 #define CPU_DISCARD(sec)
92 #else
93 #define CPU_KEEP(sec)
94 #define CPU_DISCARD(sec) *(.cpu##sec)
95 #endif
96
97 #if defined(CONFIG_MEMORY_HOTPLUG)
98 #define MEM_KEEP(sec)    *(.mem##sec)
99 #define MEM_DISCARD(sec)
100 #else
101 #define MEM_KEEP(sec)
102 #define MEM_DISCARD(sec) *(.mem##sec)
103 #endif
104
105 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
106 #define MCOUNT_REC()    . = ALIGN(8);                           \
107                         VMLINUX_SYMBOL(__start_mcount_loc) = .; \
108                         *(__mcount_loc)                         \
109                         VMLINUX_SYMBOL(__stop_mcount_loc) = .;
110 #else
111 #define MCOUNT_REC()
112 #endif
113
114 #ifdef CONFIG_TRACE_BRANCH_PROFILING
115 #define LIKELY_PROFILE()        VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \
116                                 *(_ftrace_annotated_branch)                           \
117                                 VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .;
118 #else
119 #define LIKELY_PROFILE()
120 #endif
121
122 #ifdef CONFIG_PROFILE_ALL_BRANCHES
123 #define BRANCH_PROFILE()        VMLINUX_SYMBOL(__start_branch_profile) = .;   \
124                                 *(_ftrace_branch)                             \
125                                 VMLINUX_SYMBOL(__stop_branch_profile) = .;
126 #else
127 #define BRANCH_PROFILE()
128 #endif
129
130 #ifdef CONFIG_KPROBES
131 #define KPROBE_BLACKLIST()      . = ALIGN(8);                                 \
132                                 VMLINUX_SYMBOL(__start_kprobe_blacklist) = .; \
133                                 KEEP(*(_kprobe_blacklist))                    \
134                                 VMLINUX_SYMBOL(__stop_kprobe_blacklist) = .;
135 #else
136 #define KPROBE_BLACKLIST()
137 #endif
138
139 #ifdef CONFIG_FUNCTION_ERROR_INJECTION
140 #define ERROR_INJECT_WHITELIST()        STRUCT_ALIGN();                       \
141                         VMLINUX_SYMBOL(__start_error_injection_whitelist) = .;\
142                         KEEP(*(_error_injection_whitelist))                   \
143                         VMLINUX_SYMBOL(__stop_error_injection_whitelist) = .;
144 #else
145 #define ERROR_INJECT_WHITELIST()
146 #endif
147
148 #ifdef CONFIG_EVENT_TRACING
149 #define FTRACE_EVENTS() . = ALIGN(8);                                   \
150                         VMLINUX_SYMBOL(__start_ftrace_events) = .;      \
151                         KEEP(*(_ftrace_events))                         \
152                         VMLINUX_SYMBOL(__stop_ftrace_events) = .;       \
153                         VMLINUX_SYMBOL(__start_ftrace_eval_maps) = .;   \
154                         KEEP(*(_ftrace_eval_map))                       \
155                         VMLINUX_SYMBOL(__stop_ftrace_eval_maps) = .;
156 #else
157 #define FTRACE_EVENTS()
158 #endif
159
160 #ifdef CONFIG_TRACING
161 #define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .;      \
162                          KEEP(*(__trace_printk_fmt)) /* Trace_printk fmt' pointer */ \
163                          VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .;
164 #define TRACEPOINT_STR() VMLINUX_SYMBOL(__start___tracepoint_str) = .;  \
165                          KEEP(*(__tracepoint_str)) /* Trace_printk fmt' pointer */ \
166                          VMLINUX_SYMBOL(__stop___tracepoint_str) = .;
167 #else
168 #define TRACE_PRINTKS()
169 #define TRACEPOINT_STR()
170 #endif
171
172 #ifdef CONFIG_FTRACE_SYSCALLS
173 #define TRACE_SYSCALLS() . = ALIGN(8);                                  \
174                          VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \
175                          KEEP(*(__syscalls_metadata))                   \
176                          VMLINUX_SYMBOL(__stop_syscalls_metadata) = .;
177 #else
178 #define TRACE_SYSCALLS()
179 #endif
180
181 #ifdef CONFIG_BPF_EVENTS
182 #define BPF_RAW_TP() STRUCT_ALIGN();                                    \
183                          VMLINUX_SYMBOL(__start__bpf_raw_tp) = .;       \
184                          KEEP(*(__bpf_raw_tp_map))                      \
185                          VMLINUX_SYMBOL(__stop__bpf_raw_tp) = .;
186 #else
187 #define BPF_RAW_TP()
188 #endif
189
190 #ifdef CONFIG_SERIAL_EARLYCON
191 #define EARLYCON_TABLE() STRUCT_ALIGN();                        \
192                          VMLINUX_SYMBOL(__earlycon_table) = .;  \
193                          KEEP(*(__earlycon_table))              \
194                          VMLINUX_SYMBOL(__earlycon_table_end) = .;
195 #else
196 #define EARLYCON_TABLE()
197 #endif
198
199 #define ___OF_TABLE(cfg, name)  _OF_TABLE_##cfg(name)
200 #define __OF_TABLE(cfg, name)   ___OF_TABLE(cfg, name)
201 #define OF_TABLE(cfg, name)     __OF_TABLE(IS_ENABLED(cfg), name)
202 #define _OF_TABLE_0(name)
203 #define _OF_TABLE_1(name)                                               \
204         . = ALIGN(8);                                                   \
205         VMLINUX_SYMBOL(__##name##_of_table) = .;                        \
206         KEEP(*(__##name##_of_table))                                    \
207         KEEP(*(__##name##_of_table_end))
208
209 #define TIMER_OF_TABLES()       OF_TABLE(CONFIG_TIMER_OF, timer)
210 #define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip)
211 #define CLK_OF_TABLES()         OF_TABLE(CONFIG_COMMON_CLK, clk)
212 #define IOMMU_OF_TABLES()       OF_TABLE(CONFIG_OF_IOMMU, iommu)
213 #define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem)
214 #define CPU_METHOD_OF_TABLES()  OF_TABLE(CONFIG_SMP, cpu_method)
215 #define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method)
216
217 #ifdef CONFIG_ACPI
218 #define ACPI_PROBE_TABLE(name)                                          \
219         . = ALIGN(8);                                                   \
220         VMLINUX_SYMBOL(__##name##_acpi_probe_table) = .;                \
221         KEEP(*(__##name##_acpi_probe_table))                            \
222         VMLINUX_SYMBOL(__##name##_acpi_probe_table_end) = .;
223 #else
224 #define ACPI_PROBE_TABLE(name)
225 #endif
226
227 #define KERNEL_DTB()                                                    \
228         STRUCT_ALIGN();                                                 \
229         VMLINUX_SYMBOL(__dtb_start) = .;                                \
230         KEEP(*(.dtb.init.rodata))                                       \
231         VMLINUX_SYMBOL(__dtb_end) = .;
232
233 /*
234  * .data section
235  */
236 #define DATA_DATA                                                       \
237         *(.xiptext)                                                     \
238         *(DATA_MAIN)                                                    \
239         *(.ref.data)                                                    \
240         *(.data..shared_aligned) /* percpu related */                   \
241         MEM_KEEP(init.data)                                             \
242         MEM_KEEP(exit.data)                                             \
243         *(.data.unlikely)                                               \
244         VMLINUX_SYMBOL(__start_once) = .;                               \
245         *(.data.once)                                                   \
246         VMLINUX_SYMBOL(__end_once) = .;                                 \
247         STRUCT_ALIGN();                                                 \
248         *(__tracepoints)                                                \
249         /* implement dynamic printk debug */                            \
250         . = ALIGN(8);                                                   \
251         VMLINUX_SYMBOL(__start___jump_table) = .;                       \
252         KEEP(*(__jump_table))                                           \
253         VMLINUX_SYMBOL(__stop___jump_table) = .;                        \
254         . = ALIGN(8);                                                   \
255         VMLINUX_SYMBOL(__start___verbose) = .;                          \
256         KEEP(*(__verbose))                                              \
257         VMLINUX_SYMBOL(__stop___verbose) = .;                           \
258         LIKELY_PROFILE()                                                \
259         BRANCH_PROFILE()                                                \
260         TRACE_PRINTKS()                                                 \
261         BPF_RAW_TP()                                                    \
262         TRACEPOINT_STR()
263
264 /*
265  * Data section helpers
266  */
267 #define NOSAVE_DATA                                                     \
268         . = ALIGN(PAGE_SIZE);                                           \
269         VMLINUX_SYMBOL(__nosave_begin) = .;                             \
270         *(.data..nosave)                                                \
271         . = ALIGN(PAGE_SIZE);                                           \
272         VMLINUX_SYMBOL(__nosave_end) = .;
273
274 #define PAGE_ALIGNED_DATA(page_align)                                   \
275         . = ALIGN(page_align);                                          \
276         *(.data..page_aligned)
277
278 #define READ_MOSTLY_DATA(align)                                         \
279         . = ALIGN(align);                                               \
280         *(.data..read_mostly)                                           \
281         . = ALIGN(align);
282
283 #define CACHELINE_ALIGNED_DATA(align)                                   \
284         . = ALIGN(align);                                               \
285         *(.data..cacheline_aligned)
286
287 #define INIT_TASK_DATA(align)                                           \
288         . = ALIGN(align);                                               \
289         VMLINUX_SYMBOL(__start_init_task) = .;                          \
290         VMLINUX_SYMBOL(init_thread_union) = .;                          \
291         VMLINUX_SYMBOL(init_stack) = .;                                 \
292         *(.data..init_task)                                             \
293         *(.data..init_thread_info)                                      \
294         . = VMLINUX_SYMBOL(__start_init_task) + THREAD_SIZE;            \
295         VMLINUX_SYMBOL(__end_init_task) = .;
296
297 /*
298  * Allow architectures to handle ro_after_init data on their
299  * own by defining an empty RO_AFTER_INIT_DATA.
300  */
301 #ifndef RO_AFTER_INIT_DATA
302 #define RO_AFTER_INIT_DATA                                              \
303         VMLINUX_SYMBOL(__start_ro_after_init) = .;                      \
304         *(.data..ro_after_init)                                         \
305         VMLINUX_SYMBOL(__end_ro_after_init) = .;
306 #endif
307
308 /*
309  * Read only Data
310  */
311 #define RO_DATA_SECTION(align)                                          \
312         . = ALIGN((align));                                             \
313         .rodata           : AT(ADDR(.rodata) - LOAD_OFFSET) {           \
314                 VMLINUX_SYMBOL(__start_rodata) = .;                     \
315                 *(.rodata) *(.rodata.*)                                 \
316                 RO_AFTER_INIT_DATA      /* Read only after init */      \
317                 KEEP(*(__vermagic))     /* Kernel version magic */      \
318                 . = ALIGN(8);                                           \
319                 VMLINUX_SYMBOL(__start___tracepoints_ptrs) = .;         \
320                 KEEP(*(__tracepoints_ptrs)) /* Tracepoints: pointer array */ \
321                 VMLINUX_SYMBOL(__stop___tracepoints_ptrs) = .;          \
322                 *(__tracepoints_strings)/* Tracepoints: strings */      \
323         }                                                               \
324                                                                         \
325         .rodata1          : AT(ADDR(.rodata1) - LOAD_OFFSET) {          \
326                 *(.rodata1)                                             \
327         }                                                               \
328                                                                         \
329         /* PCI quirks */                                                \
330         .pci_fixup        : AT(ADDR(.pci_fixup) - LOAD_OFFSET) {        \
331                 VMLINUX_SYMBOL(__start_pci_fixups_early) = .;           \
332                 KEEP(*(.pci_fixup_early))                               \
333                 VMLINUX_SYMBOL(__end_pci_fixups_early) = .;             \
334                 VMLINUX_SYMBOL(__start_pci_fixups_header) = .;          \
335                 KEEP(*(.pci_fixup_header))                              \
336                 VMLINUX_SYMBOL(__end_pci_fixups_header) = .;            \
337                 VMLINUX_SYMBOL(__start_pci_fixups_final) = .;           \
338                 KEEP(*(.pci_fixup_final))                               \
339                 VMLINUX_SYMBOL(__end_pci_fixups_final) = .;             \
340                 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .;          \
341                 KEEP(*(.pci_fixup_enable))                              \
342                 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .;            \
343                 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .;          \
344                 KEEP(*(.pci_fixup_resume))                              \
345                 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .;            \
346                 VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .;    \
347                 KEEP(*(.pci_fixup_resume_early))                        \
348                 VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .;      \
349                 VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .;         \
350                 KEEP(*(.pci_fixup_suspend))                             \
351                 VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .;           \
352                 VMLINUX_SYMBOL(__start_pci_fixups_suspend_late) = .;    \
353                 KEEP(*(.pci_fixup_suspend_late))                        \
354                 VMLINUX_SYMBOL(__end_pci_fixups_suspend_late) = .;      \
355         }                                                               \
356                                                                         \
357         /* Built-in firmware blobs */                                   \
358         .builtin_fw        : AT(ADDR(.builtin_fw) - LOAD_OFFSET) {      \
359                 VMLINUX_SYMBOL(__start_builtin_fw) = .;                 \
360                 KEEP(*(.builtin_fw))                                    \
361                 VMLINUX_SYMBOL(__end_builtin_fw) = .;                   \
362         }                                                               \
363                                                                         \
364         TRACEDATA                                                       \
365                                                                         \
366         /* Kernel symbol table: Normal symbols */                       \
367         __ksymtab         : AT(ADDR(__ksymtab) - LOAD_OFFSET) {         \
368                 VMLINUX_SYMBOL(__start___ksymtab) = .;                  \
369                 KEEP(*(SORT(___ksymtab+*)))                             \
370                 VMLINUX_SYMBOL(__stop___ksymtab) = .;                   \
371         }                                                               \
372                                                                         \
373         /* Kernel symbol table: GPL-only symbols */                     \
374         __ksymtab_gpl     : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) {     \
375                 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .;              \
376                 KEEP(*(SORT(___ksymtab_gpl+*)))                         \
377                 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .;               \
378         }                                                               \
379                                                                         \
380         /* Kernel symbol table: Normal unused symbols */                \
381         __ksymtab_unused  : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) {  \
382                 VMLINUX_SYMBOL(__start___ksymtab_unused) = .;           \
383                 KEEP(*(SORT(___ksymtab_unused+*)))                      \
384                 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .;            \
385         }                                                               \
386                                                                         \
387         /* Kernel symbol table: GPL-only unused symbols */              \
388         __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
389                 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .;       \
390                 KEEP(*(SORT(___ksymtab_unused_gpl+*)))                  \
391                 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .;        \
392         }                                                               \
393                                                                         \
394         /* Kernel symbol table: GPL-future-only symbols */              \
395         __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
396                 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .;       \
397                 KEEP(*(SORT(___ksymtab_gpl_future+*)))                  \
398                 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .;        \
399         }                                                               \
400                                                                         \
401         /* Kernel symbol table: Normal symbols */                       \
402         __kcrctab         : AT(ADDR(__kcrctab) - LOAD_OFFSET) {         \
403                 VMLINUX_SYMBOL(__start___kcrctab) = .;                  \
404                 KEEP(*(SORT(___kcrctab+*)))                             \
405                 VMLINUX_SYMBOL(__stop___kcrctab) = .;                   \
406         }                                                               \
407                                                                         \
408         /* Kernel symbol table: GPL-only symbols */                     \
409         __kcrctab_gpl     : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) {     \
410                 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .;              \
411                 KEEP(*(SORT(___kcrctab_gpl+*)))                         \
412                 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .;               \
413         }                                                               \
414                                                                         \
415         /* Kernel symbol table: Normal unused symbols */                \
416         __kcrctab_unused  : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) {  \
417                 VMLINUX_SYMBOL(__start___kcrctab_unused) = .;           \
418                 KEEP(*(SORT(___kcrctab_unused+*)))                      \
419                 VMLINUX_SYMBOL(__stop___kcrctab_unused) = .;            \
420         }                                                               \
421                                                                         \
422         /* Kernel symbol table: GPL-only unused symbols */              \
423         __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
424                 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .;       \
425                 KEEP(*(SORT(___kcrctab_unused_gpl+*)))                  \
426                 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .;        \
427         }                                                               \
428                                                                         \
429         /* Kernel symbol table: GPL-future-only symbols */              \
430         __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
431                 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .;       \
432                 KEEP(*(SORT(___kcrctab_gpl_future+*)))                  \
433                 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .;        \
434         }                                                               \
435                                                                         \
436         /* Kernel symbol table: strings */                              \
437         __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
438                 *(__ksymtab_strings)                                    \
439         }                                                               \
440                                                                         \
441         /* __*init sections */                                          \
442         __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) {         \
443                 *(.ref.rodata)                                          \
444                 MEM_KEEP(init.rodata)                                   \
445                 MEM_KEEP(exit.rodata)                                   \
446         }                                                               \
447                                                                         \
448         /* Built-in module parameters. */                               \
449         __param : AT(ADDR(__param) - LOAD_OFFSET) {                     \
450                 VMLINUX_SYMBOL(__start___param) = .;                    \
451                 KEEP(*(__param))                                        \
452                 VMLINUX_SYMBOL(__stop___param) = .;                     \
453         }                                                               \
454                                                                         \
455         /* Built-in module versions. */                                 \
456         __modver : AT(ADDR(__modver) - LOAD_OFFSET) {                   \
457                 VMLINUX_SYMBOL(__start___modver) = .;                   \
458                 KEEP(*(__modver))                                       \
459                 VMLINUX_SYMBOL(__stop___modver) = .;                    \
460                 . = ALIGN((align));                                     \
461                 VMLINUX_SYMBOL(__end_rodata) = .;                       \
462         }                                                               \
463         . = ALIGN((align));
464
465 /* RODATA & RO_DATA provided for backward compatibility.
466  * All archs are supposed to use RO_DATA() */
467 #define RODATA          RO_DATA_SECTION(4096)
468 #define RO_DATA(align)  RO_DATA_SECTION(align)
469
470 #define SECURITY_INIT                                                   \
471         .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
472                 VMLINUX_SYMBOL(__security_initcall_start) = .;          \
473                 KEEP(*(.security_initcall.init))                        \
474                 VMLINUX_SYMBOL(__security_initcall_end) = .;            \
475         }
476
477 /*
478  * .text section. Map to function alignment to avoid address changes
479  * during second ld run in second ld pass when generating System.map
480  *
481  * TEXT_MAIN here will match .text.fixup and .text.unlikely if dead
482  * code elimination is enabled, so these sections should be converted
483  * to use ".." first.
484  */
485 #define TEXT_TEXT                                                       \
486                 ALIGN_FUNCTION();                                       \
487                 *(.text.hot TEXT_MAIN .text.fixup .text.unlikely)       \
488                 *(.text..refcount)                                      \
489                 *(.ref.text)                                            \
490         MEM_KEEP(init.text)                                             \
491         MEM_KEEP(exit.text)                                             \
492
493
494 /* sched.text is aling to function alignment to secure we have same
495  * address even at second ld pass when generating System.map */
496 #define SCHED_TEXT                                                      \
497                 ALIGN_FUNCTION();                                       \
498                 VMLINUX_SYMBOL(__sched_text_start) = .;                 \
499                 *(.sched.text)                                          \
500                 VMLINUX_SYMBOL(__sched_text_end) = .;
501
502 /* spinlock.text is aling to function alignment to secure we have same
503  * address even at second ld pass when generating System.map */
504 #define LOCK_TEXT                                                       \
505                 ALIGN_FUNCTION();                                       \
506                 VMLINUX_SYMBOL(__lock_text_start) = .;                  \
507                 *(.spinlock.text)                                       \
508                 VMLINUX_SYMBOL(__lock_text_end) = .;
509
510 #define CPUIDLE_TEXT                                                    \
511                 ALIGN_FUNCTION();                                       \
512                 VMLINUX_SYMBOL(__cpuidle_text_start) = .;               \
513                 *(.cpuidle.text)                                        \
514                 VMLINUX_SYMBOL(__cpuidle_text_end) = .;
515
516 #define KPROBES_TEXT                                                    \
517                 ALIGN_FUNCTION();                                       \
518                 VMLINUX_SYMBOL(__kprobes_text_start) = .;               \
519                 *(.kprobes.text)                                        \
520                 VMLINUX_SYMBOL(__kprobes_text_end) = .;
521
522 #define ENTRY_TEXT                                                      \
523                 ALIGN_FUNCTION();                                       \
524                 VMLINUX_SYMBOL(__entry_text_start) = .;                 \
525                 *(.entry.text)                                          \
526                 VMLINUX_SYMBOL(__entry_text_end) = .;
527
528 #define IRQENTRY_TEXT                                                   \
529                 ALIGN_FUNCTION();                                       \
530                 VMLINUX_SYMBOL(__irqentry_text_start) = .;              \
531                 *(.irqentry.text)                                       \
532                 VMLINUX_SYMBOL(__irqentry_text_end) = .;
533
534 #define SOFTIRQENTRY_TEXT                                               \
535                 ALIGN_FUNCTION();                                       \
536                 VMLINUX_SYMBOL(__softirqentry_text_start) = .;          \
537                 *(.softirqentry.text)                                   \
538                 VMLINUX_SYMBOL(__softirqentry_text_end) = .;
539
540 /* Section used for early init (in .S files) */
541 #define HEAD_TEXT  *(.head.text)
542
543 #define HEAD_TEXT_SECTION                                                       \
544         .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) {               \
545                 HEAD_TEXT                                               \
546         }
547
548 /*
549  * Exception table
550  */
551 #define EXCEPTION_TABLE(align)                                          \
552         . = ALIGN(align);                                               \
553         __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {               \
554                 VMLINUX_SYMBOL(__start___ex_table) = .;                 \
555                 KEEP(*(__ex_table))                                     \
556                 VMLINUX_SYMBOL(__stop___ex_table) = .;                  \
557         }
558
559 /*
560  * Init task
561  */
562 #define INIT_TASK_DATA_SECTION(align)                                   \
563         . = ALIGN(align);                                               \
564         .data..init_task :  AT(ADDR(.data..init_task) - LOAD_OFFSET) {  \
565                 INIT_TASK_DATA(align)                                   \
566         }
567
568 #ifdef CONFIG_CONSTRUCTORS
569 #define KERNEL_CTORS()  . = ALIGN(8);                      \
570                         VMLINUX_SYMBOL(__ctors_start) = .; \
571                         KEEP(*(.ctors))                    \
572                         KEEP(*(SORT(.init_array.*)))       \
573                         KEEP(*(.init_array))               \
574                         VMLINUX_SYMBOL(__ctors_end) = .;
575 #else
576 #define KERNEL_CTORS()
577 #endif
578
579 /* init and exit section handling */
580 #define INIT_DATA                                                       \
581         KEEP(*(SORT(___kentry+*)))                                      \
582         *(.init.data)                                                   \
583         MEM_DISCARD(init.data)                                          \
584         KERNEL_CTORS()                                                  \
585         MCOUNT_REC()                                                    \
586         *(.init.rodata)                                                 \
587         FTRACE_EVENTS()                                                 \
588         TRACE_SYSCALLS()                                                \
589         KPROBE_BLACKLIST()                                              \
590         ERROR_INJECT_WHITELIST()                                        \
591         MEM_DISCARD(init.rodata)                                        \
592         CLK_OF_TABLES()                                                 \
593         RESERVEDMEM_OF_TABLES()                                         \
594         TIMER_OF_TABLES()                                               \
595         IOMMU_OF_TABLES()                                               \
596         CPU_METHOD_OF_TABLES()                                          \
597         CPUIDLE_METHOD_OF_TABLES()                                      \
598         KERNEL_DTB()                                                    \
599         IRQCHIP_OF_MATCH_TABLE()                                        \
600         ACPI_PROBE_TABLE(irqchip)                                       \
601         ACPI_PROBE_TABLE(timer)                                         \
602         EARLYCON_TABLE()
603
604 #define INIT_TEXT                                                       \
605         *(.init.text)                                                   \
606         *(.text.startup)                                                \
607         MEM_DISCARD(init.text)
608
609 #define EXIT_DATA                                                       \
610         *(.exit.data)                                                   \
611         *(.fini_array)                                                  \
612         *(.dtors)                                                       \
613         MEM_DISCARD(exit.data)                                          \
614         MEM_DISCARD(exit.rodata)
615
616 #define EXIT_TEXT                                                       \
617         *(.exit.text)                                                   \
618         *(.text.exit)                                                   \
619         MEM_DISCARD(exit.text)
620
621 #define EXIT_CALL                                                       \
622         *(.exitcall.exit)
623
624 /*
625  * bss (Block Started by Symbol) - uninitialized data
626  * zeroed during startup
627  */
628 #define SBSS(sbss_align)                                                \
629         . = ALIGN(sbss_align);                                          \
630         .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) {                         \
631                 *(.dynsbss)                                             \
632                 *(.sbss)                                                \
633                 *(.scommon)                                             \
634         }
635
636 /*
637  * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra
638  * sections to the front of bss.
639  */
640 #ifndef BSS_FIRST_SECTIONS
641 #define BSS_FIRST_SECTIONS
642 #endif
643
644 #define BSS(bss_align)                                                  \
645         . = ALIGN(bss_align);                                           \
646         .bss : AT(ADDR(.bss) - LOAD_OFFSET) {                           \
647                 BSS_FIRST_SECTIONS                                      \
648                 *(.bss..page_aligned)                                   \
649                 *(.dynbss)                                              \
650                 *(BSS_MAIN)                                             \
651                 *(COMMON)                                               \
652         }
653
654 /*
655  * DWARF debug sections.
656  * Symbols in the DWARF debugging sections are relative to
657  * the beginning of the section so we begin them at 0.
658  */
659 #define DWARF_DEBUG                                                     \
660                 /* DWARF 1 */                                           \
661                 .debug          0 : { *(.debug) }                       \
662                 .line           0 : { *(.line) }                        \
663                 /* GNU DWARF 1 extensions */                            \
664                 .debug_srcinfo  0 : { *(.debug_srcinfo) }               \
665                 .debug_sfnames  0 : { *(.debug_sfnames) }               \
666                 /* DWARF 1.1 and DWARF 2 */                             \
667                 .debug_aranges  0 : { *(.debug_aranges) }               \
668                 .debug_pubnames 0 : { *(.debug_pubnames) }              \
669                 /* DWARF 2 */                                           \
670                 .debug_info     0 : { *(.debug_info                     \
671                                 .gnu.linkonce.wi.*) }                   \
672                 .debug_abbrev   0 : { *(.debug_abbrev) }                \
673                 .debug_line     0 : { *(.debug_line) }                  \
674                 .debug_frame    0 : { *(.debug_frame) }                 \
675                 .debug_str      0 : { *(.debug_str) }                   \
676                 .debug_loc      0 : { *(.debug_loc) }                   \
677                 .debug_macinfo  0 : { *(.debug_macinfo) }               \
678                 .debug_pubtypes 0 : { *(.debug_pubtypes) }              \
679                 /* DWARF 3 */                                           \
680                 .debug_ranges   0 : { *(.debug_ranges) }                \
681                 /* SGI/MIPS DWARF 2 extensions */                       \
682                 .debug_weaknames 0 : { *(.debug_weaknames) }            \
683                 .debug_funcnames 0 : { *(.debug_funcnames) }            \
684                 .debug_typenames 0 : { *(.debug_typenames) }            \
685                 .debug_varnames  0 : { *(.debug_varnames) }             \
686                 /* GNU DWARF 2 extensions */                            \
687                 .debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) }      \
688                 .debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) }      \
689                 /* DWARF 4 */                                           \
690                 .debug_types    0 : { *(.debug_types) }                 \
691                 /* DWARF 5 */                                           \
692                 .debug_macro    0 : { *(.debug_macro) }                 \
693                 .debug_addr     0 : { *(.debug_addr) }
694
695                 /* Stabs debugging sections.  */
696 #define STABS_DEBUG                                                     \
697                 .stab 0 : { *(.stab) }                                  \
698                 .stabstr 0 : { *(.stabstr) }                            \
699                 .stab.excl 0 : { *(.stab.excl) }                        \
700                 .stab.exclstr 0 : { *(.stab.exclstr) }                  \
701                 .stab.index 0 : { *(.stab.index) }                      \
702                 .stab.indexstr 0 : { *(.stab.indexstr) }                \
703                 .comment 0 : { *(.comment) }
704
705 #ifdef CONFIG_GENERIC_BUG
706 #define BUG_TABLE                                                       \
707         . = ALIGN(8);                                                   \
708         __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) {             \
709                 VMLINUX_SYMBOL(__start___bug_table) = .;                \
710                 KEEP(*(__bug_table))                                    \
711                 VMLINUX_SYMBOL(__stop___bug_table) = .;                 \
712         }
713 #else
714 #define BUG_TABLE
715 #endif
716
717 #ifdef CONFIG_UNWINDER_ORC
718 #define ORC_UNWIND_TABLE                                                \
719         . = ALIGN(4);                                                   \
720         .orc_unwind_ip : AT(ADDR(.orc_unwind_ip) - LOAD_OFFSET) {       \
721                 VMLINUX_SYMBOL(__start_orc_unwind_ip) = .;              \
722                 KEEP(*(.orc_unwind_ip))                                 \
723                 VMLINUX_SYMBOL(__stop_orc_unwind_ip) = .;               \
724         }                                                               \
725         . = ALIGN(6);                                                   \
726         .orc_unwind : AT(ADDR(.orc_unwind) - LOAD_OFFSET) {             \
727                 VMLINUX_SYMBOL(__start_orc_unwind) = .;                 \
728                 KEEP(*(.orc_unwind))                                    \
729                 VMLINUX_SYMBOL(__stop_orc_unwind) = .;                  \
730         }                                                               \
731         . = ALIGN(4);                                                   \
732         .orc_lookup : AT(ADDR(.orc_lookup) - LOAD_OFFSET) {             \
733                 VMLINUX_SYMBOL(orc_lookup) = .;                         \
734                 . += (((SIZEOF(.text) + LOOKUP_BLOCK_SIZE - 1) /        \
735                         LOOKUP_BLOCK_SIZE) + 1) * 4;                    \
736                 VMLINUX_SYMBOL(orc_lookup_end) = .;                     \
737         }
738 #else
739 #define ORC_UNWIND_TABLE
740 #endif
741
742 #ifdef CONFIG_PM_TRACE
743 #define TRACEDATA                                                       \
744         . = ALIGN(4);                                                   \
745         .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) {               \
746                 VMLINUX_SYMBOL(__tracedata_start) = .;                  \
747                 KEEP(*(.tracedata))                                     \
748                 VMLINUX_SYMBOL(__tracedata_end) = .;                    \
749         }
750 #else
751 #define TRACEDATA
752 #endif
753
754 #define NOTES                                                           \
755         .notes : AT(ADDR(.notes) - LOAD_OFFSET) {                       \
756                 VMLINUX_SYMBOL(__start_notes) = .;                      \
757                 *(.note.*)                                              \
758                 VMLINUX_SYMBOL(__stop_notes) = .;                       \
759         }
760
761 #define INIT_SETUP(initsetup_align)                                     \
762                 . = ALIGN(initsetup_align);                             \
763                 VMLINUX_SYMBOL(__setup_start) = .;                      \
764                 KEEP(*(.init.setup))                                    \
765                 VMLINUX_SYMBOL(__setup_end) = .;
766
767 #define INIT_CALLS_LEVEL(level)                                         \
768                 VMLINUX_SYMBOL(__initcall##level##_start) = .;          \
769                 KEEP(*(.initcall##level##.init))                        \
770                 KEEP(*(.initcall##level##s.init))                       \
771
772 #define INIT_CALLS                                                      \
773                 VMLINUX_SYMBOL(__initcall_start) = .;                   \
774                 KEEP(*(.initcallearly.init))                            \
775                 INIT_CALLS_LEVEL(0)                                     \
776                 INIT_CALLS_LEVEL(1)                                     \
777                 INIT_CALLS_LEVEL(2)                                     \
778                 INIT_CALLS_LEVEL(3)                                     \
779                 INIT_CALLS_LEVEL(4)                                     \
780                 INIT_CALLS_LEVEL(5)                                     \
781                 INIT_CALLS_LEVEL(rootfs)                                \
782                 INIT_CALLS_LEVEL(6)                                     \
783                 INIT_CALLS_LEVEL(7)                                     \
784                 VMLINUX_SYMBOL(__initcall_end) = .;
785
786 #define CON_INITCALL                                                    \
787                 VMLINUX_SYMBOL(__con_initcall_start) = .;               \
788                 KEEP(*(.con_initcall.init))                             \
789                 VMLINUX_SYMBOL(__con_initcall_end) = .;
790
791 #define SECURITY_INITCALL                                               \
792                 VMLINUX_SYMBOL(__security_initcall_start) = .;          \
793                 KEEP(*(.security_initcall.init))                        \
794                 VMLINUX_SYMBOL(__security_initcall_end) = .;
795
796 #ifdef CONFIG_BLK_DEV_INITRD
797 #define INIT_RAM_FS                                                     \
798         . = ALIGN(4);                                                   \
799         VMLINUX_SYMBOL(__initramfs_start) = .;                          \
800         KEEP(*(.init.ramfs))                                            \
801         . = ALIGN(8);                                                   \
802         KEEP(*(.init.ramfs.info))
803 #else
804 #define INIT_RAM_FS
805 #endif
806
807 /*
808  * Memory encryption operates on a page basis. Since we need to clear
809  * the memory encryption mask for this section, it needs to be aligned
810  * on a page boundary and be a page-size multiple in length.
811  *
812  * Note: We use a separate section so that only this section gets
813  * decrypted to avoid exposing more than we wish.
814  */
815 #ifdef CONFIG_AMD_MEM_ENCRYPT
816 #define PERCPU_DECRYPTED_SECTION                                        \
817         . = ALIGN(PAGE_SIZE);                                           \
818         *(.data..percpu..decrypted)                                     \
819         . = ALIGN(PAGE_SIZE);
820 #else
821 #define PERCPU_DECRYPTED_SECTION
822 #endif
823
824
825 /*
826  * Default discarded sections.
827  *
828  * Some archs want to discard exit text/data at runtime rather than
829  * link time due to cross-section references such as alt instructions,
830  * bug table, eh_frame, etc.  DISCARDS must be the last of output
831  * section definitions so that such archs put those in earlier section
832  * definitions.
833  */
834 #define DISCARDS                                                        \
835         /DISCARD/ : {                                                   \
836         EXIT_TEXT                                                       \
837         EXIT_DATA                                                       \
838         EXIT_CALL                                                       \
839         *(.discard)                                                     \
840         *(.discard.*)                                                   \
841         }
842
843 /**
844  * PERCPU_INPUT - the percpu input sections
845  * @cacheline: cacheline size
846  *
847  * The core percpu section names and core symbols which do not rely
848  * directly upon load addresses.
849  *
850  * @cacheline is used to align subsections to avoid false cacheline
851  * sharing between subsections for different purposes.
852  */
853 #define PERCPU_INPUT(cacheline)                                         \
854         VMLINUX_SYMBOL(__per_cpu_start) = .;                            \
855         *(.data..percpu..first)                                         \
856         . = ALIGN(PAGE_SIZE);                                           \
857         *(.data..percpu..page_aligned)                                  \
858         . = ALIGN(cacheline);                                           \
859         *(.data..percpu..read_mostly)                                   \
860         . = ALIGN(cacheline);                                           \
861         *(.data..percpu)                                                \
862         *(.data..percpu..shared_aligned)                                \
863         PERCPU_DECRYPTED_SECTION                                        \
864         VMLINUX_SYMBOL(__per_cpu_end) = .;
865
866 /**
867  * PERCPU_VADDR - define output section for percpu area
868  * @cacheline: cacheline size
869  * @vaddr: explicit base address (optional)
870  * @phdr: destination PHDR (optional)
871  *
872  * Macro which expands to output section for percpu area.
873  *
874  * @cacheline is used to align subsections to avoid false cacheline
875  * sharing between subsections for different purposes.
876  *
877  * If @vaddr is not blank, it specifies explicit base address and all
878  * percpu symbols will be offset from the given address.  If blank,
879  * @vaddr always equals @laddr + LOAD_OFFSET.
880  *
881  * @phdr defines the output PHDR to use if not blank.  Be warned that
882  * output PHDR is sticky.  If @phdr is specified, the next output
883  * section in the linker script will go there too.  @phdr should have
884  * a leading colon.
885  *
886  * Note that this macros defines __per_cpu_load as an absolute symbol.
887  * If there is no need to put the percpu section at a predetermined
888  * address, use PERCPU_SECTION.
889  */
890 #define PERCPU_VADDR(cacheline, vaddr, phdr)                            \
891         VMLINUX_SYMBOL(__per_cpu_load) = .;                             \
892         .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load)         \
893                                 - LOAD_OFFSET) {                        \
894                 PERCPU_INPUT(cacheline)                                 \
895         } phdr                                                          \
896         . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu);
897
898 /**
899  * PERCPU_SECTION - define output section for percpu area, simple version
900  * @cacheline: cacheline size
901  *
902  * Align to PAGE_SIZE and outputs output section for percpu area.  This
903  * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and
904  * __per_cpu_start will be identical.
905  *
906  * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,)
907  * except that __per_cpu_load is defined as a relative symbol against
908  * .data..percpu which is required for relocatable x86_32 configuration.
909  */
910 #define PERCPU_SECTION(cacheline)                                       \
911         . = ALIGN(PAGE_SIZE);                                           \
912         .data..percpu   : AT(ADDR(.data..percpu) - LOAD_OFFSET) {       \
913                 VMLINUX_SYMBOL(__per_cpu_load) = .;                     \
914                 PERCPU_INPUT(cacheline)                                 \
915         }
916
917
918 /*
919  * Definition of the high level *_SECTION macros
920  * They will fit only a subset of the architectures
921  */
922
923
924 /*
925  * Writeable data.
926  * All sections are combined in a single .data section.
927  * The sections following CONSTRUCTORS are arranged so their
928  * typical alignment matches.
929  * A cacheline is typical/always less than a PAGE_SIZE so
930  * the sections that has this restriction (or similar)
931  * is located before the ones requiring PAGE_SIZE alignment.
932  * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
933  * matches the requirement of PAGE_ALIGNED_DATA.
934  *
935  * use 0 as page_align if page_aligned data is not used */
936 #define RW_DATA_SECTION(cacheline, pagealigned, inittask)               \
937         . = ALIGN(PAGE_SIZE);                                           \
938         .data : AT(ADDR(.data) - LOAD_OFFSET) {                         \
939                 INIT_TASK_DATA(inittask)                                \
940                 NOSAVE_DATA                                             \
941                 PAGE_ALIGNED_DATA(pagealigned)                          \
942                 CACHELINE_ALIGNED_DATA(cacheline)                       \
943                 READ_MOSTLY_DATA(cacheline)                             \
944                 DATA_DATA                                               \
945                 CONSTRUCTORS                                            \
946         }                                                               \
947         BUG_TABLE                                                       \
948
949 #define INIT_TEXT_SECTION(inittext_align)                               \
950         . = ALIGN(inittext_align);                                      \
951         .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {               \
952                 VMLINUX_SYMBOL(_sinittext) = .;                         \
953                 INIT_TEXT                                               \
954                 VMLINUX_SYMBOL(_einittext) = .;                         \
955         }
956
957 #define INIT_DATA_SECTION(initsetup_align)                              \
958         .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {               \
959                 INIT_DATA                                               \
960                 INIT_SETUP(initsetup_align)                             \
961                 INIT_CALLS                                              \
962                 CON_INITCALL                                            \
963                 SECURITY_INITCALL                                       \
964                 INIT_RAM_FS                                             \
965         }
966
967 #define BSS_SECTION(sbss_align, bss_align, stop_align)                  \
968         . = ALIGN(sbss_align);                                          \
969         VMLINUX_SYMBOL(__bss_start) = .;                                \
970         SBSS(sbss_align)                                                \
971         BSS(bss_align)                                                  \
972         . = ALIGN(stop_align);                                          \
973         VMLINUX_SYMBOL(__bss_stop) = .;