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)
30 * EXCEPTION_TABLE(...)
32 * BSS_SECTION(0, 0, 0)
38 * DISCARDS // must be the last
41 * [__init_begin, __init_end] is the init section that may be freed after init
42 * // __init_begin and __init_end should be page aligned, so that we can
43 * // free the whole .init memory
44 * [_stext, _etext] is the text section
45 * [_sdata, _edata] is the data section
47 * Some of the included output section have their own set of constants.
48 * Examples are: [__initramfs_start, __initramfs_end] for initramfs and
49 * [__nosave_begin, __nosave_end] for the nosave data
57 * Only some architectures want to have the .notes segment visible in
58 * a separate PT_NOTE ELF Program Header. When this happens, it needs
59 * to be visible in both the kernel text's PT_LOAD and the PT_NOTE
60 * Program Headers. In this case, though, the PT_LOAD needs to be made
61 * the default again so that all the following sections don't also end
62 * up in the PT_NOTE Program Header.
65 #define NOTES_HEADERS :text :note
66 #define NOTES_HEADERS_RESTORE __restore_ph : { *(.__restore_ph) } :text
69 #define NOTES_HEADERS_RESTORE
73 * Some architectures have non-executable read-only exception tables.
74 * They can be added to the RO_DATA segment by specifying their desired
77 #ifdef RO_EXCEPTION_TABLE_ALIGN
78 #define RO_EXCEPTION_TABLE EXCEPTION_TABLE(RO_EXCEPTION_TABLE_ALIGN)
80 #define RO_EXCEPTION_TABLE
83 /* Align . to a 8 byte boundary equals to maximum function alignment. */
84 #define ALIGN_FUNCTION() . = ALIGN(8)
87 * LD_DEAD_CODE_DATA_ELIMINATION option enables -fdata-sections, which
88 * generates .data.identifier sections, which need to be pulled in with
89 * .data. We don't want to pull in .data..other sections, which Linux
90 * has defined. Same for text and bss.
92 * RODATA_MAIN is not used because existing code already defines .rodata.x
93 * sections to be brought in with rodata.
95 #ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
96 #define TEXT_MAIN .text .text.[0-9a-zA-Z_]*
97 #define DATA_MAIN .data .data.[0-9a-zA-Z_]* .data..LPBX*
98 #define SDATA_MAIN .sdata .sdata.[0-9a-zA-Z_]*
99 #define RODATA_MAIN .rodata .rodata.[0-9a-zA-Z_]*
100 #define BSS_MAIN .bss .bss.[0-9a-zA-Z_]*
101 #define SBSS_MAIN .sbss .sbss.[0-9a-zA-Z_]*
103 #define TEXT_MAIN .text
104 #define DATA_MAIN .data
105 #define SDATA_MAIN .sdata
106 #define RODATA_MAIN .rodata
107 #define BSS_MAIN .bss
108 #define SBSS_MAIN .sbss
112 * GCC 4.5 and later have a 32 bytes section alignment for structures.
113 * Except GCC 4.9, that feels the need to align on 64 bytes.
115 #if __GNUC__ == 4 && __GNUC_MINOR__ == 9
116 #define STRUCT_ALIGNMENT 64
118 #define STRUCT_ALIGNMENT 32
120 #define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT)
123 * The order of the sched class addresses are important, as they are
124 * used to determine the order of the priority of each sched class in
125 * relation to each other.
129 __begin_sched_classes = .; \
130 *(__idle_sched_class) \
131 *(__fair_sched_class) \
132 *(__rt_sched_class) \
133 *(__dl_sched_class) \
134 *(__stop_sched_class) \
135 __end_sched_classes = .;
137 /* The actual configuration determine if the init/exit sections
138 * are handled as text/data or they can be discarded (which
139 * often happens at runtime)
141 #ifdef CONFIG_HOTPLUG_CPU
142 #define CPU_KEEP(sec) *(.cpu##sec)
143 #define CPU_DISCARD(sec)
145 #define CPU_KEEP(sec)
146 #define CPU_DISCARD(sec) *(.cpu##sec)
149 #if defined(CONFIG_MEMORY_HOTPLUG)
150 #define MEM_KEEP(sec) *(.mem##sec)
151 #define MEM_DISCARD(sec)
153 #define MEM_KEEP(sec)
154 #define MEM_DISCARD(sec) *(.mem##sec)
157 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
159 * The ftrace call sites are logged to a section whose name depends on the
160 * compiler option used. A given kernel image will only use one, AKA
161 * FTRACE_CALLSITE_SECTION. We capture all of them here to avoid header
162 * dependencies for FTRACE_CALLSITE_SECTION's definition.
164 * Need to also make ftrace_stub_graph point to ftrace_stub
165 * so that the same stub location may have different protocols
166 * and not mess up with C verifiers.
168 #define MCOUNT_REC() . = ALIGN(8); \
169 __start_mcount_loc = .; \
170 KEEP(*(__mcount_loc)) \
171 KEEP(*(__patchable_function_entries)) \
172 __stop_mcount_loc = .; \
173 ftrace_stub_graph = ftrace_stub;
175 # ifdef CONFIG_FUNCTION_TRACER
176 # define MCOUNT_REC() ftrace_stub_graph = ftrace_stub;
178 # define MCOUNT_REC()
182 #ifdef CONFIG_TRACE_BRANCH_PROFILING
183 #define LIKELY_PROFILE() __start_annotated_branch_profile = .; \
184 KEEP(*(_ftrace_annotated_branch)) \
185 __stop_annotated_branch_profile = .;
187 #define LIKELY_PROFILE()
190 #ifdef CONFIG_PROFILE_ALL_BRANCHES
191 #define BRANCH_PROFILE() __start_branch_profile = .; \
192 KEEP(*(_ftrace_branch)) \
193 __stop_branch_profile = .;
195 #define BRANCH_PROFILE()
198 #ifdef CONFIG_KPROBES
199 #define KPROBE_BLACKLIST() . = ALIGN(8); \
200 __start_kprobe_blacklist = .; \
201 KEEP(*(_kprobe_blacklist)) \
202 __stop_kprobe_blacklist = .;
204 #define KPROBE_BLACKLIST()
207 #ifdef CONFIG_FUNCTION_ERROR_INJECTION
208 #define ERROR_INJECT_WHITELIST() STRUCT_ALIGN(); \
209 __start_error_injection_whitelist = .; \
210 KEEP(*(_error_injection_whitelist)) \
211 __stop_error_injection_whitelist = .;
213 #define ERROR_INJECT_WHITELIST()
216 #ifdef CONFIG_EVENT_TRACING
217 #define FTRACE_EVENTS() . = ALIGN(8); \
218 __start_ftrace_events = .; \
219 KEEP(*(_ftrace_events)) \
220 __stop_ftrace_events = .; \
221 __start_ftrace_eval_maps = .; \
222 KEEP(*(_ftrace_eval_map)) \
223 __stop_ftrace_eval_maps = .;
225 #define FTRACE_EVENTS()
228 #ifdef CONFIG_TRACING
229 #define TRACE_PRINTKS() __start___trace_bprintk_fmt = .; \
230 KEEP(*(__trace_printk_fmt)) /* Trace_printk fmt' pointer */ \
231 __stop___trace_bprintk_fmt = .;
232 #define TRACEPOINT_STR() __start___tracepoint_str = .; \
233 KEEP(*(__tracepoint_str)) /* Trace_printk fmt' pointer */ \
234 __stop___tracepoint_str = .;
236 #define TRACE_PRINTKS()
237 #define TRACEPOINT_STR()
240 #ifdef CONFIG_FTRACE_SYSCALLS
241 #define TRACE_SYSCALLS() . = ALIGN(8); \
242 __start_syscalls_metadata = .; \
243 KEEP(*(__syscalls_metadata)) \
244 __stop_syscalls_metadata = .;
246 #define TRACE_SYSCALLS()
249 #ifdef CONFIG_BPF_EVENTS
250 #define BPF_RAW_TP() STRUCT_ALIGN(); \
251 __start__bpf_raw_tp = .; \
252 KEEP(*(__bpf_raw_tp_map)) \
253 __stop__bpf_raw_tp = .;
258 #ifdef CONFIG_SERIAL_EARLYCON
259 #define EARLYCON_TABLE() . = ALIGN(8); \
260 __earlycon_table = .; \
261 KEEP(*(__earlycon_table)) \
262 __earlycon_table_end = .;
264 #define EARLYCON_TABLE()
267 #ifdef CONFIG_SECURITY
268 #define LSM_TABLE() . = ALIGN(8); \
269 __start_lsm_info = .; \
270 KEEP(*(.lsm_info.init)) \
272 #define EARLY_LSM_TABLE() . = ALIGN(8); \
273 __start_early_lsm_info = .; \
274 KEEP(*(.early_lsm_info.init)) \
275 __end_early_lsm_info = .;
278 #define EARLY_LSM_TABLE()
281 #define ___OF_TABLE(cfg, name) _OF_TABLE_##cfg(name)
282 #define __OF_TABLE(cfg, name) ___OF_TABLE(cfg, name)
283 #define OF_TABLE(cfg, name) __OF_TABLE(IS_ENABLED(cfg), name)
284 #define _OF_TABLE_0(name)
285 #define _OF_TABLE_1(name) \
287 __##name##_of_table = .; \
288 KEEP(*(__##name##_of_table)) \
289 KEEP(*(__##name##_of_table_end))
291 #define TIMER_OF_TABLES() OF_TABLE(CONFIG_TIMER_OF, timer)
292 #define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip)
293 #define CLK_OF_TABLES() OF_TABLE(CONFIG_COMMON_CLK, clk)
294 #define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem)
295 #define CPU_METHOD_OF_TABLES() OF_TABLE(CONFIG_SMP, cpu_method)
296 #define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method)
299 #define ACPI_PROBE_TABLE(name) \
301 __##name##_acpi_probe_table = .; \
302 KEEP(*(__##name##_acpi_probe_table)) \
303 __##name##_acpi_probe_table_end = .;
305 #define ACPI_PROBE_TABLE(name)
308 #ifdef CONFIG_THERMAL
309 #define THERMAL_TABLE(name) \
311 __##name##_thermal_table = .; \
312 KEEP(*(__##name##_thermal_table)) \
313 __##name##_thermal_table_end = .;
315 #define THERMAL_TABLE(name)
318 #define KERNEL_DTB() \
321 KEEP(*(.dtb.init.rodata)) \
331 *(.data..shared_aligned) /* percpu related */ \
332 MEM_KEEP(init.data*) \
333 MEM_KEEP(exit.data*) \
340 /* implement dynamic printk debug */ \
342 __start___dyndbg = .; \
344 __stop___dyndbg = .; \
352 * Data section helpers
354 #define NOSAVE_DATA \
355 . = ALIGN(PAGE_SIZE); \
356 __nosave_begin = .; \
358 . = ALIGN(PAGE_SIZE); \
361 #define PAGE_ALIGNED_DATA(page_align) \
362 . = ALIGN(page_align); \
363 *(.data..page_aligned) \
364 . = ALIGN(page_align);
366 #define READ_MOSTLY_DATA(align) \
368 *(.data..read_mostly) \
371 #define CACHELINE_ALIGNED_DATA(align) \
373 *(.data..cacheline_aligned)
375 #define INIT_TASK_DATA(align) \
377 __start_init_task = .; \
378 init_thread_union = .; \
380 KEEP(*(.data..init_task)) \
381 KEEP(*(.data..init_thread_info)) \
382 . = __start_init_task + THREAD_SIZE; \
385 #define JUMP_TABLE_DATA \
387 __start___jump_table = .; \
388 KEEP(*(__jump_table)) \
389 __stop___jump_table = .;
392 * Allow architectures to handle ro_after_init data on their
393 * own by defining an empty RO_AFTER_INIT_DATA.
395 #ifndef RO_AFTER_INIT_DATA
396 #define RO_AFTER_INIT_DATA \
397 __start_ro_after_init = .; \
398 *(.data..ro_after_init) \
400 __end_ro_after_init = .;
406 #define RO_DATA(align) \
407 . = ALIGN((align)); \
408 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \
409 __start_rodata = .; \
410 *(.rodata) *(.rodata.*) \
412 RO_AFTER_INIT_DATA /* Read only after init */ \
414 __start___tracepoints_ptrs = .; \
415 KEEP(*(__tracepoints_ptrs)) /* Tracepoints: pointer array */ \
416 __stop___tracepoints_ptrs = .; \
417 *(__tracepoints_strings)/* Tracepoints: strings */ \
420 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \
425 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \
426 __start_pci_fixups_early = .; \
427 KEEP(*(.pci_fixup_early)) \
428 __end_pci_fixups_early = .; \
429 __start_pci_fixups_header = .; \
430 KEEP(*(.pci_fixup_header)) \
431 __end_pci_fixups_header = .; \
432 __start_pci_fixups_final = .; \
433 KEEP(*(.pci_fixup_final)) \
434 __end_pci_fixups_final = .; \
435 __start_pci_fixups_enable = .; \
436 KEEP(*(.pci_fixup_enable)) \
437 __end_pci_fixups_enable = .; \
438 __start_pci_fixups_resume = .; \
439 KEEP(*(.pci_fixup_resume)) \
440 __end_pci_fixups_resume = .; \
441 __start_pci_fixups_resume_early = .; \
442 KEEP(*(.pci_fixup_resume_early)) \
443 __end_pci_fixups_resume_early = .; \
444 __start_pci_fixups_suspend = .; \
445 KEEP(*(.pci_fixup_suspend)) \
446 __end_pci_fixups_suspend = .; \
447 __start_pci_fixups_suspend_late = .; \
448 KEEP(*(.pci_fixup_suspend_late)) \
449 __end_pci_fixups_suspend_late = .; \
452 /* Built-in firmware blobs */ \
453 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \
454 __start_builtin_fw = .; \
455 KEEP(*(.builtin_fw)) \
456 __end_builtin_fw = .; \
461 /* Kernel symbol table: Normal symbols */ \
462 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \
463 __start___ksymtab = .; \
464 KEEP(*(SORT(___ksymtab+*))) \
465 __stop___ksymtab = .; \
468 /* Kernel symbol table: GPL-only symbols */ \
469 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \
470 __start___ksymtab_gpl = .; \
471 KEEP(*(SORT(___ksymtab_gpl+*))) \
472 __stop___ksymtab_gpl = .; \
475 /* Kernel symbol table: Normal unused symbols */ \
476 __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \
477 __start___ksymtab_unused = .; \
478 KEEP(*(SORT(___ksymtab_unused+*))) \
479 __stop___ksymtab_unused = .; \
482 /* Kernel symbol table: GPL-only unused symbols */ \
483 __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
484 __start___ksymtab_unused_gpl = .; \
485 KEEP(*(SORT(___ksymtab_unused_gpl+*))) \
486 __stop___ksymtab_unused_gpl = .; \
489 /* Kernel symbol table: GPL-future-only symbols */ \
490 __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
491 __start___ksymtab_gpl_future = .; \
492 KEEP(*(SORT(___ksymtab_gpl_future+*))) \
493 __stop___ksymtab_gpl_future = .; \
496 /* Kernel symbol table: Normal symbols */ \
497 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \
498 __start___kcrctab = .; \
499 KEEP(*(SORT(___kcrctab+*))) \
500 __stop___kcrctab = .; \
503 /* Kernel symbol table: GPL-only symbols */ \
504 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \
505 __start___kcrctab_gpl = .; \
506 KEEP(*(SORT(___kcrctab_gpl+*))) \
507 __stop___kcrctab_gpl = .; \
510 /* Kernel symbol table: Normal unused symbols */ \
511 __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \
512 __start___kcrctab_unused = .; \
513 KEEP(*(SORT(___kcrctab_unused+*))) \
514 __stop___kcrctab_unused = .; \
517 /* Kernel symbol table: GPL-only unused symbols */ \
518 __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
519 __start___kcrctab_unused_gpl = .; \
520 KEEP(*(SORT(___kcrctab_unused_gpl+*))) \
521 __stop___kcrctab_unused_gpl = .; \
524 /* Kernel symbol table: GPL-future-only symbols */ \
525 __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
526 __start___kcrctab_gpl_future = .; \
527 KEEP(*(SORT(___kcrctab_gpl_future+*))) \
528 __stop___kcrctab_gpl_future = .; \
531 /* Kernel symbol table: strings */ \
532 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
533 *(__ksymtab_strings) \
536 /* __*init sections */ \
537 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \
539 MEM_KEEP(init.rodata) \
540 MEM_KEEP(exit.rodata) \
543 /* Built-in module parameters. */ \
544 __param : AT(ADDR(__param) - LOAD_OFFSET) { \
545 __start___param = .; \
547 __stop___param = .; \
550 /* Built-in module versions. */ \
551 __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \
552 __start___modver = .; \
554 __stop___modver = .; \
561 . = ALIGN((align)); \
565 * Non-instrumentable text section
567 #define NOINSTR_TEXT \
569 __noinstr_text_start = .; \
571 __noinstr_text_end = .;
574 * .text section. Map to function alignment to avoid address changes
575 * during second ld run in second ld pass when generating System.map
577 * TEXT_MAIN here will match .text.fixup and .text.unlikely if dead
578 * code elimination is enabled, so these sections should be converted
583 *(.text.hot TEXT_MAIN .text.fixup .text.unlikely) \
587 MEM_KEEP(init.text*) \
588 MEM_KEEP(exit.text*) \
591 /* sched.text is aling to function alignment to secure we have same
592 * address even at second ld pass when generating System.map */
595 __sched_text_start = .; \
597 __sched_text_end = .;
599 /* spinlock.text is aling to function alignment to secure we have same
600 * address even at second ld pass when generating System.map */
603 __lock_text_start = .; \
607 #define CPUIDLE_TEXT \
609 __cpuidle_text_start = .; \
611 __cpuidle_text_end = .;
613 #define KPROBES_TEXT \
615 __kprobes_text_start = .; \
617 __kprobes_text_end = .;
621 __entry_text_start = .; \
623 __entry_text_end = .;
625 #define IRQENTRY_TEXT \
627 __irqentry_text_start = .; \
629 __irqentry_text_end = .;
631 #define SOFTIRQENTRY_TEXT \
633 __softirqentry_text_start = .; \
634 *(.softirqentry.text) \
635 __softirqentry_text_end = .;
637 /* Section used for early init (in .S files) */
638 #define HEAD_TEXT KEEP(*(.head.text))
640 #define HEAD_TEXT_SECTION \
641 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \
648 #define EXCEPTION_TABLE(align) \
650 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \
651 __start___ex_table = .; \
652 KEEP(*(__ex_table)) \
653 __stop___ex_table = .; \
659 #ifdef CONFIG_DEBUG_INFO_BTF
661 .BTF : AT(ADDR(.BTF) - LOAD_OFFSET) { \
667 .BTF_ids : AT(ADDR(.BTF_ids) - LOAD_OFFSET) { \
677 #define INIT_TASK_DATA_SECTION(align) \
679 .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \
680 INIT_TASK_DATA(align) \
683 #ifdef CONFIG_CONSTRUCTORS
684 #define KERNEL_CTORS() . = ALIGN(8); \
687 KEEP(*(SORT(.init_array.*))) \
688 KEEP(*(.init_array)) \
691 #define KERNEL_CTORS()
694 /* init and exit section handling */
696 KEEP(*(SORT(___kentry+*))) \
697 *(.init.data init.data.*) \
698 MEM_DISCARD(init.data*) \
701 *(.init.rodata .init.rodata.*) \
705 ERROR_INJECT_WHITELIST() \
706 MEM_DISCARD(init.rodata) \
708 RESERVEDMEM_OF_TABLES() \
710 CPU_METHOD_OF_TABLES() \
711 CPUIDLE_METHOD_OF_TABLES() \
713 IRQCHIP_OF_MATCH_TABLE() \
714 ACPI_PROBE_TABLE(irqchip) \
715 ACPI_PROBE_TABLE(timer) \
716 THERMAL_TABLE(governor) \
722 *(.init.text .init.text.*) \
724 MEM_DISCARD(init.text*)
727 *(.exit.data .exit.data.*) \
728 *(.fini_array .fini_array.*) \
730 MEM_DISCARD(exit.data*) \
731 MEM_DISCARD(exit.rodata*)
736 MEM_DISCARD(exit.text)
742 * bss (Block Started by Symbol) - uninitialized data
743 * zeroed during startup
745 #define SBSS(sbss_align) \
746 . = ALIGN(sbss_align); \
747 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \
754 * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra
755 * sections to the front of bss.
757 #ifndef BSS_FIRST_SECTIONS
758 #define BSS_FIRST_SECTIONS
761 #define BSS(bss_align) \
762 . = ALIGN(bss_align); \
763 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \
765 . = ALIGN(PAGE_SIZE); \
766 *(.bss..page_aligned) \
767 . = ALIGN(PAGE_SIZE); \
774 * DWARF debug sections.
775 * Symbols in the DWARF debugging sections are relative to
776 * the beginning of the section so we begin them at 0.
778 #define DWARF_DEBUG \
780 .debug 0 : { *(.debug) } \
781 .line 0 : { *(.line) } \
782 /* GNU DWARF 1 extensions */ \
783 .debug_srcinfo 0 : { *(.debug_srcinfo) } \
784 .debug_sfnames 0 : { *(.debug_sfnames) } \
785 /* DWARF 1.1 and DWARF 2 */ \
786 .debug_aranges 0 : { *(.debug_aranges) } \
787 .debug_pubnames 0 : { *(.debug_pubnames) } \
789 .debug_info 0 : { *(.debug_info \
790 .gnu.linkonce.wi.*) } \
791 .debug_abbrev 0 : { *(.debug_abbrev) } \
792 .debug_line 0 : { *(.debug_line) } \
793 .debug_frame 0 : { *(.debug_frame) } \
794 .debug_str 0 : { *(.debug_str) } \
795 .debug_loc 0 : { *(.debug_loc) } \
796 .debug_macinfo 0 : { *(.debug_macinfo) } \
797 .debug_pubtypes 0 : { *(.debug_pubtypes) } \
799 .debug_ranges 0 : { *(.debug_ranges) } \
800 /* SGI/MIPS DWARF 2 extensions */ \
801 .debug_weaknames 0 : { *(.debug_weaknames) } \
802 .debug_funcnames 0 : { *(.debug_funcnames) } \
803 .debug_typenames 0 : { *(.debug_typenames) } \
804 .debug_varnames 0 : { *(.debug_varnames) } \
805 /* GNU DWARF 2 extensions */ \
806 .debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) } \
807 .debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) } \
809 .debug_types 0 : { *(.debug_types) } \
811 .debug_macro 0 : { *(.debug_macro) } \
812 .debug_addr 0 : { *(.debug_addr) }
814 /* Stabs debugging sections. */
815 #define STABS_DEBUG \
816 .stab 0 : { *(.stab) } \
817 .stabstr 0 : { *(.stabstr) } \
818 .stab.excl 0 : { *(.stab.excl) } \
819 .stab.exclstr 0 : { *(.stab.exclstr) } \
820 .stab.index 0 : { *(.stab.index) } \
821 .stab.indexstr 0 : { *(.stab.indexstr) } \
822 .comment 0 : { *(.comment) }
824 #ifdef CONFIG_GENERIC_BUG
827 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \
828 __start___bug_table = .; \
829 KEEP(*(__bug_table)) \
830 __stop___bug_table = .; \
836 #ifdef CONFIG_UNWINDER_ORC
837 #define ORC_UNWIND_TABLE \
839 .orc_unwind_ip : AT(ADDR(.orc_unwind_ip) - LOAD_OFFSET) { \
840 __start_orc_unwind_ip = .; \
841 KEEP(*(.orc_unwind_ip)) \
842 __stop_orc_unwind_ip = .; \
845 .orc_unwind : AT(ADDR(.orc_unwind) - LOAD_OFFSET) { \
846 __start_orc_unwind = .; \
847 KEEP(*(.orc_unwind)) \
848 __stop_orc_unwind = .; \
851 .orc_lookup : AT(ADDR(.orc_lookup) - LOAD_OFFSET) { \
853 . += (((SIZEOF(.text) + LOOKUP_BLOCK_SIZE - 1) / \
854 LOOKUP_BLOCK_SIZE) + 1) * 4; \
855 orc_lookup_end = .; \
858 #define ORC_UNWIND_TABLE
861 #ifdef CONFIG_PM_TRACE
864 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \
865 __tracedata_start = .; \
866 KEEP(*(.tracedata)) \
867 __tracedata_end = .; \
874 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \
879 NOTES_HEADERS_RESTORE
881 #define INIT_SETUP(initsetup_align) \
882 . = ALIGN(initsetup_align); \
884 KEEP(*(.init.setup)) \
887 #define INIT_CALLS_LEVEL(level) \
888 __initcall##level##_start = .; \
889 KEEP(*(.initcall##level##.init)) \
890 KEEP(*(.initcall##level##s.init)) \
893 __initcall_start = .; \
894 KEEP(*(.initcallearly.init)) \
895 INIT_CALLS_LEVEL(0) \
896 INIT_CALLS_LEVEL(1) \
897 INIT_CALLS_LEVEL(2) \
898 INIT_CALLS_LEVEL(3) \
899 INIT_CALLS_LEVEL(4) \
900 INIT_CALLS_LEVEL(5) \
901 INIT_CALLS_LEVEL(rootfs) \
902 INIT_CALLS_LEVEL(6) \
903 INIT_CALLS_LEVEL(7) \
906 #define CON_INITCALL \
907 __con_initcall_start = .; \
908 KEEP(*(.con_initcall.init)) \
909 __con_initcall_end = .;
911 #ifdef CONFIG_BLK_DEV_INITRD
912 #define INIT_RAM_FS \
914 __initramfs_start = .; \
915 KEEP(*(.init.ramfs)) \
917 KEEP(*(.init.ramfs.info))
923 * Memory encryption operates on a page basis. Since we need to clear
924 * the memory encryption mask for this section, it needs to be aligned
925 * on a page boundary and be a page-size multiple in length.
927 * Note: We use a separate section so that only this section gets
928 * decrypted to avoid exposing more than we wish.
930 #ifdef CONFIG_AMD_MEM_ENCRYPT
931 #define PERCPU_DECRYPTED_SECTION \
932 . = ALIGN(PAGE_SIZE); \
933 *(.data..percpu..decrypted) \
934 . = ALIGN(PAGE_SIZE);
936 #define PERCPU_DECRYPTED_SECTION
941 * Default discarded sections.
943 * Some archs want to discard exit text/data at runtime rather than
944 * link time due to cross-section references such as alt instructions,
945 * bug table, eh_frame, etc. DISCARDS must be the last of output
946 * section definitions so that such archs put those in earlier section
949 #ifdef RUNTIME_DISCARD_EXIT
950 #define EXIT_DISCARDS
952 #define EXIT_DISCARDS \
967 * PERCPU_INPUT - the percpu input sections
968 * @cacheline: cacheline size
970 * The core percpu section names and core symbols which do not rely
971 * directly upon load addresses.
973 * @cacheline is used to align subsections to avoid false cacheline
974 * sharing between subsections for different purposes.
976 #define PERCPU_INPUT(cacheline) \
977 __per_cpu_start = .; \
978 *(.data..percpu..first) \
979 . = ALIGN(PAGE_SIZE); \
980 *(.data..percpu..page_aligned) \
981 . = ALIGN(cacheline); \
982 *(.data..percpu..read_mostly) \
983 . = ALIGN(cacheline); \
985 *(.data..percpu..shared_aligned) \
986 PERCPU_DECRYPTED_SECTION \
990 * PERCPU_VADDR - define output section for percpu area
991 * @cacheline: cacheline size
992 * @vaddr: explicit base address (optional)
993 * @phdr: destination PHDR (optional)
995 * Macro which expands to output section for percpu area.
997 * @cacheline is used to align subsections to avoid false cacheline
998 * sharing between subsections for different purposes.
1000 * If @vaddr is not blank, it specifies explicit base address and all
1001 * percpu symbols will be offset from the given address. If blank,
1002 * @vaddr always equals @laddr + LOAD_OFFSET.
1004 * @phdr defines the output PHDR to use if not blank. Be warned that
1005 * output PHDR is sticky. If @phdr is specified, the next output
1006 * section in the linker script will go there too. @phdr should have
1009 * Note that this macros defines __per_cpu_load as an absolute symbol.
1010 * If there is no need to put the percpu section at a predetermined
1011 * address, use PERCPU_SECTION.
1013 #define PERCPU_VADDR(cacheline, vaddr, phdr) \
1014 __per_cpu_load = .; \
1015 .data..percpu vaddr : AT(__per_cpu_load - LOAD_OFFSET) { \
1016 PERCPU_INPUT(cacheline) \
1018 . = __per_cpu_load + SIZEOF(.data..percpu);
1021 * PERCPU_SECTION - define output section for percpu area, simple version
1022 * @cacheline: cacheline size
1024 * Align to PAGE_SIZE and outputs output section for percpu area. This
1025 * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and
1026 * __per_cpu_start will be identical.
1028 * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,)
1029 * except that __per_cpu_load is defined as a relative symbol against
1030 * .data..percpu which is required for relocatable x86_32 configuration.
1032 #define PERCPU_SECTION(cacheline) \
1033 . = ALIGN(PAGE_SIZE); \
1034 .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \
1035 __per_cpu_load = .; \
1036 PERCPU_INPUT(cacheline) \
1041 * Definition of the high level *_SECTION macros
1042 * They will fit only a subset of the architectures
1048 * All sections are combined in a single .data section.
1049 * The sections following CONSTRUCTORS are arranged so their
1050 * typical alignment matches.
1051 * A cacheline is typical/always less than a PAGE_SIZE so
1052 * the sections that has this restriction (or similar)
1053 * is located before the ones requiring PAGE_SIZE alignment.
1054 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
1055 * matches the requirement of PAGE_ALIGNED_DATA.
1057 * use 0 as page_align if page_aligned data is not used */
1058 #define RW_DATA(cacheline, pagealigned, inittask) \
1059 . = ALIGN(PAGE_SIZE); \
1060 .data : AT(ADDR(.data) - LOAD_OFFSET) { \
1061 INIT_TASK_DATA(inittask) \
1063 PAGE_ALIGNED_DATA(pagealigned) \
1064 CACHELINE_ALIGNED_DATA(cacheline) \
1065 READ_MOSTLY_DATA(cacheline) \
1071 #define INIT_TEXT_SECTION(inittext_align) \
1072 . = ALIGN(inittext_align); \
1073 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \
1079 #define INIT_DATA_SECTION(initsetup_align) \
1080 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \
1082 INIT_SETUP(initsetup_align) \
1088 #define BSS_SECTION(sbss_align, bss_align, stop_align) \
1089 . = ALIGN(sbss_align); \
1093 . = ALIGN(stop_align); \