2 * Helper macros to support writing architecture specific
5 * A minimal linker scripts has following content:
6 * [This is a sample, architectures may have special requiriements]
16 * INIT_TEXT_SECTION(PAGE_SIZE)
17 * INIT_DATA_SECTION(...)
18 * PERCPU_SECTION(CACHELINE_SIZE)
26 * RO_DATA_SECTION(PAGE_SIZE)
27 * RW_DATA_SECTION(...)
30 * EXCEPTION_TABLE(...)
33 * BSS_SECTION(0, 0, 0)
39 * DISCARDS // must be the last
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
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
57 /* Align . to a 8 byte boundary equals to maximum function alignment. */
58 #define ALIGN_FUNCTION() . = ALIGN(8)
61 * LD_DEAD_CODE_DATA_ELIMINATION option enables -fdata-sections, which
62 * generates .data.identifier sections, which need to be pulled in with
63 * .data. We don't want to pull in .data..other sections, which Linux
64 * has defined. Same for text and bss.
66 * RODATA_MAIN is not used because existing code already defines .rodata.x
67 * sections to be brought in with rodata.
69 #ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
70 #define TEXT_MAIN .text .text.[0-9a-zA-Z_]*
71 #define DATA_MAIN .data .data.[0-9a-zA-Z_]* .data..LPBX*
72 #define SDATA_MAIN .sdata .sdata.[0-9a-zA-Z_]*
73 #define RODATA_MAIN .rodata .rodata.[0-9a-zA-Z_]*
74 #define BSS_MAIN .bss .bss.[0-9a-zA-Z_]*
75 #define SBSS_MAIN .sbss .sbss.[0-9a-zA-Z_]*
77 #define TEXT_MAIN .text
78 #define DATA_MAIN .data
79 #define SDATA_MAIN .sdata
80 #define RODATA_MAIN .rodata
82 #define SBSS_MAIN .sbss
86 * Align to a 32 byte boundary equal to the
87 * alignment gcc 4.5 uses for a struct
89 #define STRUCT_ALIGNMENT 32
90 #define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT)
92 /* The actual configuration determine if the init/exit sections
93 * are handled as text/data or they can be discarded (which
94 * often happens at runtime)
96 #ifdef CONFIG_HOTPLUG_CPU
97 #define CPU_KEEP(sec) *(.cpu##sec)
98 #define CPU_DISCARD(sec)
100 #define CPU_KEEP(sec)
101 #define CPU_DISCARD(sec) *(.cpu##sec)
104 #if defined(CONFIG_MEMORY_HOTPLUG)
105 #define MEM_KEEP(sec) *(.mem##sec)
106 #define MEM_DISCARD(sec)
108 #define MEM_KEEP(sec)
109 #define MEM_DISCARD(sec) *(.mem##sec)
112 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
113 #ifdef CC_USING_PATCHABLE_FUNCTION_ENTRY
114 #define MCOUNT_REC() . = ALIGN(8); \
115 __start_mcount_loc = .; \
116 KEEP(*(__patchable_function_entries)) \
117 __stop_mcount_loc = .;
119 #define MCOUNT_REC() . = ALIGN(8); \
120 __start_mcount_loc = .; \
121 KEEP(*(__mcount_loc)) \
122 __stop_mcount_loc = .;
128 #ifdef CONFIG_TRACE_BRANCH_PROFILING
129 #define LIKELY_PROFILE() __start_annotated_branch_profile = .; \
130 KEEP(*(_ftrace_annotated_branch)) \
131 __stop_annotated_branch_profile = .;
133 #define LIKELY_PROFILE()
136 #ifdef CONFIG_PROFILE_ALL_BRANCHES
137 #define BRANCH_PROFILE() __start_branch_profile = .; \
138 KEEP(*(_ftrace_branch)) \
139 __stop_branch_profile = .;
141 #define BRANCH_PROFILE()
144 #ifdef CONFIG_KPROBES
145 #define KPROBE_BLACKLIST() . = ALIGN(8); \
146 __start_kprobe_blacklist = .; \
147 KEEP(*(_kprobe_blacklist)) \
148 __stop_kprobe_blacklist = .;
150 #define KPROBE_BLACKLIST()
153 #ifdef CONFIG_FUNCTION_ERROR_INJECTION
154 #define ERROR_INJECT_WHITELIST() STRUCT_ALIGN(); \
155 __start_error_injection_whitelist = .; \
156 KEEP(*(_error_injection_whitelist)) \
157 __stop_error_injection_whitelist = .;
159 #define ERROR_INJECT_WHITELIST()
162 #ifdef CONFIG_EVENT_TRACING
163 #define FTRACE_EVENTS() . = ALIGN(8); \
164 __start_ftrace_events = .; \
165 KEEP(*(_ftrace_events)) \
166 __stop_ftrace_events = .; \
167 __start_ftrace_eval_maps = .; \
168 KEEP(*(_ftrace_eval_map)) \
169 __stop_ftrace_eval_maps = .;
171 #define FTRACE_EVENTS()
174 #ifdef CONFIG_TRACING
175 #define TRACE_PRINTKS() __start___trace_bprintk_fmt = .; \
176 KEEP(*(__trace_printk_fmt)) /* Trace_printk fmt' pointer */ \
177 __stop___trace_bprintk_fmt = .;
178 #define TRACEPOINT_STR() __start___tracepoint_str = .; \
179 KEEP(*(__tracepoint_str)) /* Trace_printk fmt' pointer */ \
180 __stop___tracepoint_str = .;
182 #define TRACE_PRINTKS()
183 #define TRACEPOINT_STR()
186 #ifdef CONFIG_FTRACE_SYSCALLS
187 #define TRACE_SYSCALLS() . = ALIGN(8); \
188 __start_syscalls_metadata = .; \
189 KEEP(*(__syscalls_metadata)) \
190 __stop_syscalls_metadata = .;
192 #define TRACE_SYSCALLS()
195 #ifdef CONFIG_BPF_EVENTS
196 #define BPF_RAW_TP() STRUCT_ALIGN(); \
197 __start__bpf_raw_tp = .; \
198 KEEP(*(__bpf_raw_tp_map)) \
199 __stop__bpf_raw_tp = .;
204 #ifdef CONFIG_SERIAL_EARLYCON
205 #define EARLYCON_TABLE() . = ALIGN(8); \
206 __earlycon_table = .; \
207 KEEP(*(__earlycon_table)) \
208 __earlycon_table_end = .;
210 #define EARLYCON_TABLE()
213 #ifdef CONFIG_SECURITY
214 #define LSM_TABLE() . = ALIGN(8); \
215 __start_lsm_info = .; \
216 KEEP(*(.lsm_info.init)) \
218 #define EARLY_LSM_TABLE() . = ALIGN(8); \
219 __start_early_lsm_info = .; \
220 KEEP(*(.early_lsm_info.init)) \
221 __end_early_lsm_info = .;
224 #define EARLY_LSM_TABLE()
227 #define ___OF_TABLE(cfg, name) _OF_TABLE_##cfg(name)
228 #define __OF_TABLE(cfg, name) ___OF_TABLE(cfg, name)
229 #define OF_TABLE(cfg, name) __OF_TABLE(IS_ENABLED(cfg), name)
230 #define _OF_TABLE_0(name)
231 #define _OF_TABLE_1(name) \
233 __##name##_of_table = .; \
234 KEEP(*(__##name##_of_table)) \
235 KEEP(*(__##name##_of_table_end))
237 #define TIMER_OF_TABLES() OF_TABLE(CONFIG_TIMER_OF, timer)
238 #define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip)
239 #define CLK_OF_TABLES() OF_TABLE(CONFIG_COMMON_CLK, clk)
240 #define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem)
241 #define CPU_METHOD_OF_TABLES() OF_TABLE(CONFIG_SMP, cpu_method)
242 #define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method)
245 #define ACPI_PROBE_TABLE(name) \
247 __##name##_acpi_probe_table = .; \
248 KEEP(*(__##name##_acpi_probe_table)) \
249 __##name##_acpi_probe_table_end = .;
251 #define ACPI_PROBE_TABLE(name)
254 #ifdef CONFIG_THERMAL
255 #define THERMAL_TABLE(name) \
257 __##name##_thermal_table = .; \
258 KEEP(*(__##name##_thermal_table)) \
259 __##name##_thermal_table_end = .;
261 #define THERMAL_TABLE(name)
264 #define KERNEL_DTB() \
267 KEEP(*(.dtb.init.rodata)) \
277 *(.data..shared_aligned) /* percpu related */ \
278 MEM_KEEP(init.data*) \
279 MEM_KEEP(exit.data*) \
286 /* implement dynamic printk debug */ \
288 __start___verbose = .; \
290 __stop___verbose = .; \
298 * Data section helpers
300 #define NOSAVE_DATA \
301 . = ALIGN(PAGE_SIZE); \
302 __nosave_begin = .; \
304 . = ALIGN(PAGE_SIZE); \
307 #define PAGE_ALIGNED_DATA(page_align) \
308 . = ALIGN(page_align); \
309 *(.data..page_aligned)
311 #define READ_MOSTLY_DATA(align) \
313 *(.data..read_mostly) \
316 #define CACHELINE_ALIGNED_DATA(align) \
318 *(.data..cacheline_aligned)
320 #define INIT_TASK_DATA(align) \
322 __start_init_task = .; \
323 init_thread_union = .; \
325 KEEP(*(.data..init_task)) \
326 KEEP(*(.data..init_thread_info)) \
327 . = __start_init_task + THREAD_SIZE; \
330 #define JUMP_TABLE_DATA \
332 __start___jump_table = .; \
333 KEEP(*(__jump_table)) \
334 __stop___jump_table = .;
337 * Allow architectures to handle ro_after_init data on their
338 * own by defining an empty RO_AFTER_INIT_DATA.
340 #ifndef RO_AFTER_INIT_DATA
341 #define RO_AFTER_INIT_DATA \
342 __start_ro_after_init = .; \
343 *(.data..ro_after_init) \
345 __end_ro_after_init = .;
351 #define RO_DATA_SECTION(align) \
352 . = ALIGN((align)); \
353 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \
354 __start_rodata = .; \
355 *(.rodata) *(.rodata.*) \
356 RO_AFTER_INIT_DATA /* Read only after init */ \
358 __start___tracepoints_ptrs = .; \
359 KEEP(*(__tracepoints_ptrs)) /* Tracepoints: pointer array */ \
360 __stop___tracepoints_ptrs = .; \
361 *(__tracepoints_strings)/* Tracepoints: strings */ \
364 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \
369 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \
370 __start_pci_fixups_early = .; \
371 KEEP(*(.pci_fixup_early)) \
372 __end_pci_fixups_early = .; \
373 __start_pci_fixups_header = .; \
374 KEEP(*(.pci_fixup_header)) \
375 __end_pci_fixups_header = .; \
376 __start_pci_fixups_final = .; \
377 KEEP(*(.pci_fixup_final)) \
378 __end_pci_fixups_final = .; \
379 __start_pci_fixups_enable = .; \
380 KEEP(*(.pci_fixup_enable)) \
381 __end_pci_fixups_enable = .; \
382 __start_pci_fixups_resume = .; \
383 KEEP(*(.pci_fixup_resume)) \
384 __end_pci_fixups_resume = .; \
385 __start_pci_fixups_resume_early = .; \
386 KEEP(*(.pci_fixup_resume_early)) \
387 __end_pci_fixups_resume_early = .; \
388 __start_pci_fixups_suspend = .; \
389 KEEP(*(.pci_fixup_suspend)) \
390 __end_pci_fixups_suspend = .; \
391 __start_pci_fixups_suspend_late = .; \
392 KEEP(*(.pci_fixup_suspend_late)) \
393 __end_pci_fixups_suspend_late = .; \
396 /* Built-in firmware blobs */ \
397 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \
398 __start_builtin_fw = .; \
399 KEEP(*(.builtin_fw)) \
400 __end_builtin_fw = .; \
405 /* Kernel symbol table: Normal symbols */ \
406 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \
407 __start___ksymtab = .; \
408 KEEP(*(SORT(___ksymtab+*))) \
409 __stop___ksymtab = .; \
412 /* Kernel symbol table: GPL-only symbols */ \
413 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \
414 __start___ksymtab_gpl = .; \
415 KEEP(*(SORT(___ksymtab_gpl+*))) \
416 __stop___ksymtab_gpl = .; \
419 /* Kernel symbol table: Normal unused symbols */ \
420 __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \
421 __start___ksymtab_unused = .; \
422 KEEP(*(SORT(___ksymtab_unused+*))) \
423 __stop___ksymtab_unused = .; \
426 /* Kernel symbol table: GPL-only unused symbols */ \
427 __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
428 __start___ksymtab_unused_gpl = .; \
429 KEEP(*(SORT(___ksymtab_unused_gpl+*))) \
430 __stop___ksymtab_unused_gpl = .; \
433 /* Kernel symbol table: GPL-future-only symbols */ \
434 __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
435 __start___ksymtab_gpl_future = .; \
436 KEEP(*(SORT(___ksymtab_gpl_future+*))) \
437 __stop___ksymtab_gpl_future = .; \
440 /* Kernel symbol table: Normal symbols */ \
441 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \
442 __start___kcrctab = .; \
443 KEEP(*(SORT(___kcrctab+*))) \
444 __stop___kcrctab = .; \
447 /* Kernel symbol table: GPL-only symbols */ \
448 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \
449 __start___kcrctab_gpl = .; \
450 KEEP(*(SORT(___kcrctab_gpl+*))) \
451 __stop___kcrctab_gpl = .; \
454 /* Kernel symbol table: Normal unused symbols */ \
455 __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \
456 __start___kcrctab_unused = .; \
457 KEEP(*(SORT(___kcrctab_unused+*))) \
458 __stop___kcrctab_unused = .; \
461 /* Kernel symbol table: GPL-only unused symbols */ \
462 __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
463 __start___kcrctab_unused_gpl = .; \
464 KEEP(*(SORT(___kcrctab_unused_gpl+*))) \
465 __stop___kcrctab_unused_gpl = .; \
468 /* Kernel symbol table: GPL-future-only symbols */ \
469 __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
470 __start___kcrctab_gpl_future = .; \
471 KEEP(*(SORT(___kcrctab_gpl_future+*))) \
472 __stop___kcrctab_gpl_future = .; \
475 /* Kernel symbol table: strings */ \
476 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
477 *(__ksymtab_strings) \
480 /* __*init sections */ \
481 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \
483 MEM_KEEP(init.rodata) \
484 MEM_KEEP(exit.rodata) \
487 /* Built-in module parameters. */ \
488 __param : AT(ADDR(__param) - LOAD_OFFSET) { \
489 __start___param = .; \
491 __stop___param = .; \
494 /* Built-in module versions. */ \
495 __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \
496 __start___modver = .; \
498 __stop___modver = .; \
499 . = ALIGN((align)); \
504 /* RODATA & RO_DATA provided for backward compatibility.
505 * All archs are supposed to use RO_DATA() */
506 #define RODATA RO_DATA_SECTION(4096)
507 #define RO_DATA(align) RO_DATA_SECTION(align)
510 * .text section. Map to function alignment to avoid address changes
511 * during second ld run in second ld pass when generating System.map
513 * TEXT_MAIN here will match .text.fixup and .text.unlikely if dead
514 * code elimination is enabled, so these sections should be converted
519 *(.text.hot TEXT_MAIN .text.fixup .text.unlikely) \
522 MEM_KEEP(init.text*) \
523 MEM_KEEP(exit.text*) \
526 /* sched.text is aling to function alignment to secure we have same
527 * address even at second ld pass when generating System.map */
530 __sched_text_start = .; \
532 __sched_text_end = .;
534 /* spinlock.text is aling to function alignment to secure we have same
535 * address even at second ld pass when generating System.map */
538 __lock_text_start = .; \
542 #define CPUIDLE_TEXT \
544 __cpuidle_text_start = .; \
546 __cpuidle_text_end = .;
548 #define KPROBES_TEXT \
550 __kprobes_text_start = .; \
552 __kprobes_text_end = .;
556 __entry_text_start = .; \
558 __entry_text_end = .;
560 #define IRQENTRY_TEXT \
562 __irqentry_text_start = .; \
564 __irqentry_text_end = .;
566 #define SOFTIRQENTRY_TEXT \
568 __softirqentry_text_start = .; \
569 *(.softirqentry.text) \
570 __softirqentry_text_end = .;
572 /* Section used for early init (in .S files) */
573 #define HEAD_TEXT KEEP(*(.head.text))
575 #define HEAD_TEXT_SECTION \
576 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \
583 #define EXCEPTION_TABLE(align) \
585 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \
586 __start___ex_table = .; \
587 KEEP(*(__ex_table)) \
588 __stop___ex_table = .; \
594 #define INIT_TASK_DATA_SECTION(align) \
596 .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \
597 INIT_TASK_DATA(align) \
600 #ifdef CONFIG_CONSTRUCTORS
601 #define KERNEL_CTORS() . = ALIGN(8); \
604 KEEP(*(SORT(.init_array.*))) \
605 KEEP(*(.init_array)) \
608 #define KERNEL_CTORS()
611 /* init and exit section handling */
613 KEEP(*(SORT(___kentry+*))) \
614 *(.init.data init.data.*) \
615 MEM_DISCARD(init.data*) \
618 *(.init.rodata .init.rodata.*) \
622 ERROR_INJECT_WHITELIST() \
623 MEM_DISCARD(init.rodata) \
625 RESERVEDMEM_OF_TABLES() \
627 CPU_METHOD_OF_TABLES() \
628 CPUIDLE_METHOD_OF_TABLES() \
630 IRQCHIP_OF_MATCH_TABLE() \
631 ACPI_PROBE_TABLE(irqchip) \
632 ACPI_PROBE_TABLE(timer) \
633 THERMAL_TABLE(governor) \
639 *(.init.text .init.text.*) \
641 MEM_DISCARD(init.text*)
644 *(.exit.data .exit.data.*) \
645 *(.fini_array .fini_array.*) \
647 MEM_DISCARD(exit.data*) \
648 MEM_DISCARD(exit.rodata*)
653 MEM_DISCARD(exit.text)
659 * bss (Block Started by Symbol) - uninitialized data
660 * zeroed during startup
662 #define SBSS(sbss_align) \
663 . = ALIGN(sbss_align); \
664 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \
671 * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra
672 * sections to the front of bss.
674 #ifndef BSS_FIRST_SECTIONS
675 #define BSS_FIRST_SECTIONS
678 #define BSS(bss_align) \
679 . = ALIGN(bss_align); \
680 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \
682 *(.bss..page_aligned) \
689 * DWARF debug sections.
690 * Symbols in the DWARF debugging sections are relative to
691 * the beginning of the section so we begin them at 0.
693 #define DWARF_DEBUG \
695 .debug 0 : { *(.debug) } \
696 .line 0 : { *(.line) } \
697 /* GNU DWARF 1 extensions */ \
698 .debug_srcinfo 0 : { *(.debug_srcinfo) } \
699 .debug_sfnames 0 : { *(.debug_sfnames) } \
700 /* DWARF 1.1 and DWARF 2 */ \
701 .debug_aranges 0 : { *(.debug_aranges) } \
702 .debug_pubnames 0 : { *(.debug_pubnames) } \
704 .debug_info 0 : { *(.debug_info \
705 .gnu.linkonce.wi.*) } \
706 .debug_abbrev 0 : { *(.debug_abbrev) } \
707 .debug_line 0 : { *(.debug_line) } \
708 .debug_frame 0 : { *(.debug_frame) } \
709 .debug_str 0 : { *(.debug_str) } \
710 .debug_loc 0 : { *(.debug_loc) } \
711 .debug_macinfo 0 : { *(.debug_macinfo) } \
712 .debug_pubtypes 0 : { *(.debug_pubtypes) } \
714 .debug_ranges 0 : { *(.debug_ranges) } \
715 /* SGI/MIPS DWARF 2 extensions */ \
716 .debug_weaknames 0 : { *(.debug_weaknames) } \
717 .debug_funcnames 0 : { *(.debug_funcnames) } \
718 .debug_typenames 0 : { *(.debug_typenames) } \
719 .debug_varnames 0 : { *(.debug_varnames) } \
720 /* GNU DWARF 2 extensions */ \
721 .debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) } \
722 .debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) } \
724 .debug_types 0 : { *(.debug_types) } \
726 .debug_macro 0 : { *(.debug_macro) } \
727 .debug_addr 0 : { *(.debug_addr) }
729 /* Stabs debugging sections. */
730 #define STABS_DEBUG \
731 .stab 0 : { *(.stab) } \
732 .stabstr 0 : { *(.stabstr) } \
733 .stab.excl 0 : { *(.stab.excl) } \
734 .stab.exclstr 0 : { *(.stab.exclstr) } \
735 .stab.index 0 : { *(.stab.index) } \
736 .stab.indexstr 0 : { *(.stab.indexstr) } \
737 .comment 0 : { *(.comment) }
739 #ifdef CONFIG_GENERIC_BUG
742 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \
743 __start___bug_table = .; \
744 KEEP(*(__bug_table)) \
745 __stop___bug_table = .; \
751 #ifdef CONFIG_UNWINDER_ORC
752 #define ORC_UNWIND_TABLE \
754 .orc_unwind_ip : AT(ADDR(.orc_unwind_ip) - LOAD_OFFSET) { \
755 __start_orc_unwind_ip = .; \
756 KEEP(*(.orc_unwind_ip)) \
757 __stop_orc_unwind_ip = .; \
760 .orc_unwind : AT(ADDR(.orc_unwind) - LOAD_OFFSET) { \
761 __start_orc_unwind = .; \
762 KEEP(*(.orc_unwind)) \
763 __stop_orc_unwind = .; \
766 .orc_lookup : AT(ADDR(.orc_lookup) - LOAD_OFFSET) { \
768 . += (((SIZEOF(.text) + LOOKUP_BLOCK_SIZE - 1) / \
769 LOOKUP_BLOCK_SIZE) + 1) * 4; \
770 orc_lookup_end = .; \
773 #define ORC_UNWIND_TABLE
776 #ifdef CONFIG_PM_TRACE
779 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \
780 __tracedata_start = .; \
781 KEEP(*(.tracedata)) \
782 __tracedata_end = .; \
789 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \
795 #define INIT_SETUP(initsetup_align) \
796 . = ALIGN(initsetup_align); \
798 KEEP(*(.init.setup)) \
801 #define INIT_CALLS_LEVEL(level) \
802 __initcall##level##_start = .; \
803 KEEP(*(.initcall##level##.init)) \
804 KEEP(*(.initcall##level##s.init)) \
807 __initcall_start = .; \
808 KEEP(*(.initcallearly.init)) \
809 INIT_CALLS_LEVEL(0) \
810 INIT_CALLS_LEVEL(1) \
811 INIT_CALLS_LEVEL(2) \
812 INIT_CALLS_LEVEL(3) \
813 INIT_CALLS_LEVEL(4) \
814 INIT_CALLS_LEVEL(5) \
815 INIT_CALLS_LEVEL(rootfs) \
816 INIT_CALLS_LEVEL(6) \
817 INIT_CALLS_LEVEL(7) \
820 #define CON_INITCALL \
821 __con_initcall_start = .; \
822 KEEP(*(.con_initcall.init)) \
823 __con_initcall_end = .;
825 #ifdef CONFIG_BLK_DEV_INITRD
826 #define INIT_RAM_FS \
828 __initramfs_start = .; \
829 KEEP(*(.init.ramfs)) \
831 KEEP(*(.init.ramfs.info))
837 * Memory encryption operates on a page basis. Since we need to clear
838 * the memory encryption mask for this section, it needs to be aligned
839 * on a page boundary and be a page-size multiple in length.
841 * Note: We use a separate section so that only this section gets
842 * decrypted to avoid exposing more than we wish.
844 #ifdef CONFIG_AMD_MEM_ENCRYPT
845 #define PERCPU_DECRYPTED_SECTION \
846 . = ALIGN(PAGE_SIZE); \
847 *(.data..percpu..decrypted) \
848 . = ALIGN(PAGE_SIZE);
850 #define PERCPU_DECRYPTED_SECTION
855 * Default discarded sections.
857 * Some archs want to discard exit text/data at runtime rather than
858 * link time due to cross-section references such as alt instructions,
859 * bug table, eh_frame, etc. DISCARDS must be the last of output
860 * section definitions so that such archs put those in earlier section
874 * PERCPU_INPUT - the percpu input sections
875 * @cacheline: cacheline size
877 * The core percpu section names and core symbols which do not rely
878 * directly upon load addresses.
880 * @cacheline is used to align subsections to avoid false cacheline
881 * sharing between subsections for different purposes.
883 #define PERCPU_INPUT(cacheline) \
884 __per_cpu_start = .; \
885 *(.data..percpu..first) \
886 . = ALIGN(PAGE_SIZE); \
887 *(.data..percpu..page_aligned) \
888 . = ALIGN(cacheline); \
889 *(.data..percpu..read_mostly) \
890 . = ALIGN(cacheline); \
892 *(.data..percpu..shared_aligned) \
893 PERCPU_DECRYPTED_SECTION \
897 * PERCPU_VADDR - define output section for percpu area
898 * @cacheline: cacheline size
899 * @vaddr: explicit base address (optional)
900 * @phdr: destination PHDR (optional)
902 * Macro which expands to output section for percpu area.
904 * @cacheline is used to align subsections to avoid false cacheline
905 * sharing between subsections for different purposes.
907 * If @vaddr is not blank, it specifies explicit base address and all
908 * percpu symbols will be offset from the given address. If blank,
909 * @vaddr always equals @laddr + LOAD_OFFSET.
911 * @phdr defines the output PHDR to use if not blank. Be warned that
912 * output PHDR is sticky. If @phdr is specified, the next output
913 * section in the linker script will go there too. @phdr should have
916 * Note that this macros defines __per_cpu_load as an absolute symbol.
917 * If there is no need to put the percpu section at a predetermined
918 * address, use PERCPU_SECTION.
920 #define PERCPU_VADDR(cacheline, vaddr, phdr) \
921 __per_cpu_load = .; \
922 .data..percpu vaddr : AT(__per_cpu_load - LOAD_OFFSET) { \
923 PERCPU_INPUT(cacheline) \
925 . = __per_cpu_load + SIZEOF(.data..percpu);
928 * PERCPU_SECTION - define output section for percpu area, simple version
929 * @cacheline: cacheline size
931 * Align to PAGE_SIZE and outputs output section for percpu area. This
932 * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and
933 * __per_cpu_start will be identical.
935 * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,)
936 * except that __per_cpu_load is defined as a relative symbol against
937 * .data..percpu which is required for relocatable x86_32 configuration.
939 #define PERCPU_SECTION(cacheline) \
940 . = ALIGN(PAGE_SIZE); \
941 .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \
942 __per_cpu_load = .; \
943 PERCPU_INPUT(cacheline) \
948 * Definition of the high level *_SECTION macros
949 * They will fit only a subset of the architectures
955 * All sections are combined in a single .data section.
956 * The sections following CONSTRUCTORS are arranged so their
957 * typical alignment matches.
958 * A cacheline is typical/always less than a PAGE_SIZE so
959 * the sections that has this restriction (or similar)
960 * is located before the ones requiring PAGE_SIZE alignment.
961 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
962 * matches the requirement of PAGE_ALIGNED_DATA.
964 * use 0 as page_align if page_aligned data is not used */
965 #define RW_DATA_SECTION(cacheline, pagealigned, inittask) \
966 . = ALIGN(PAGE_SIZE); \
967 .data : AT(ADDR(.data) - LOAD_OFFSET) { \
968 INIT_TASK_DATA(inittask) \
970 PAGE_ALIGNED_DATA(pagealigned) \
971 CACHELINE_ALIGNED_DATA(cacheline) \
972 READ_MOSTLY_DATA(cacheline) \
978 #define INIT_TEXT_SECTION(inittext_align) \
979 . = ALIGN(inittext_align); \
980 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \
986 #define INIT_DATA_SECTION(initsetup_align) \
987 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \
989 INIT_SETUP(initsetup_align) \
995 #define BSS_SECTION(sbss_align, bss_align, stop_align) \
996 . = ALIGN(sbss_align); \
1000 . = ALIGN(stop_align); \