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 #include <linux/export.h>
59 /* Align . to a 8 byte boundary equals to maximum function alignment. */
60 #define ALIGN_FUNCTION() . = ALIGN(8)
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.
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_]*
73 #define TEXT_MAIN .text
74 #define DATA_MAIN .data
79 * Align to a 32 byte boundary equal to the
80 * alignment gcc 4.5 uses for a struct
82 #define STRUCT_ALIGNMENT 32
83 #define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT)
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)
89 #ifdef CONFIG_HOTPLUG_CPU
90 #define CPU_KEEP(sec) *(.cpu##sec)
91 #define CPU_DISCARD(sec)
94 #define CPU_DISCARD(sec) *(.cpu##sec)
97 #if defined(CONFIG_MEMORY_HOTPLUG)
98 #define MEM_KEEP(sec) *(.mem##sec)
99 #define MEM_DISCARD(sec)
101 #define MEM_KEEP(sec)
102 #define MEM_DISCARD(sec) *(.mem##sec)
105 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
106 #define MCOUNT_REC() . = ALIGN(8); \
107 VMLINUX_SYMBOL(__start_mcount_loc) = .; \
109 VMLINUX_SYMBOL(__stop_mcount_loc) = .;
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) = .;
119 #define LIKELY_PROFILE()
122 #ifdef CONFIG_PROFILE_ALL_BRANCHES
123 #define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \
125 VMLINUX_SYMBOL(__stop_branch_profile) = .;
127 #define BRANCH_PROFILE()
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) = .;
136 #define KPROBE_BLACKLIST()
139 #ifdef CONFIG_EVENT_TRACING
140 #define FTRACE_EVENTS() . = ALIGN(8); \
141 VMLINUX_SYMBOL(__start_ftrace_events) = .; \
142 KEEP(*(_ftrace_events)) \
143 VMLINUX_SYMBOL(__stop_ftrace_events) = .; \
144 VMLINUX_SYMBOL(__start_ftrace_eval_maps) = .; \
145 KEEP(*(_ftrace_eval_map)) \
146 VMLINUX_SYMBOL(__stop_ftrace_eval_maps) = .;
148 #define FTRACE_EVENTS()
151 #ifdef CONFIG_TRACING
152 #define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \
153 KEEP(*(__trace_printk_fmt)) /* Trace_printk fmt' pointer */ \
154 VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .;
155 #define TRACEPOINT_STR() VMLINUX_SYMBOL(__start___tracepoint_str) = .; \
156 KEEP(*(__tracepoint_str)) /* Trace_printk fmt' pointer */ \
157 VMLINUX_SYMBOL(__stop___tracepoint_str) = .;
159 #define TRACE_PRINTKS()
160 #define TRACEPOINT_STR()
163 #ifdef CONFIG_FTRACE_SYSCALLS
164 #define TRACE_SYSCALLS() . = ALIGN(8); \
165 VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \
166 KEEP(*(__syscalls_metadata)) \
167 VMLINUX_SYMBOL(__stop_syscalls_metadata) = .;
169 #define TRACE_SYSCALLS()
172 #ifdef CONFIG_SERIAL_EARLYCON
173 #define EARLYCON_TABLE() . = ALIGN(8); \
174 VMLINUX_SYMBOL(__earlycon_table) = .; \
175 KEEP(*(__earlycon_table)) \
176 VMLINUX_SYMBOL(__earlycon_table_end) = .;
178 #define EARLYCON_TABLE()
181 #define ___OF_TABLE(cfg, name) _OF_TABLE_##cfg(name)
182 #define __OF_TABLE(cfg, name) ___OF_TABLE(cfg, name)
183 #define OF_TABLE(cfg, name) __OF_TABLE(IS_ENABLED(cfg), name)
184 #define _OF_TABLE_0(name)
185 #define _OF_TABLE_1(name) \
187 VMLINUX_SYMBOL(__##name##_of_table) = .; \
188 KEEP(*(__##name##_of_table)) \
189 KEEP(*(__##name##_of_table_end))
191 #define TIMER_OF_TABLES() OF_TABLE(CONFIG_TIMER_OF, timer)
192 #define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip)
193 #define CLK_OF_TABLES() OF_TABLE(CONFIG_COMMON_CLK, clk)
194 #define IOMMU_OF_TABLES() OF_TABLE(CONFIG_OF_IOMMU, iommu)
195 #define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem)
196 #define CPU_METHOD_OF_TABLES() OF_TABLE(CONFIG_SMP, cpu_method)
197 #define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method)
200 #define ACPI_PROBE_TABLE(name) \
202 VMLINUX_SYMBOL(__##name##_acpi_probe_table) = .; \
203 KEEP(*(__##name##_acpi_probe_table)) \
204 VMLINUX_SYMBOL(__##name##_acpi_probe_table_end) = .;
206 #define ACPI_PROBE_TABLE(name)
209 #define KERNEL_DTB() \
211 VMLINUX_SYMBOL(__dtb_start) = .; \
212 KEEP(*(.dtb.init.rodata)) \
213 VMLINUX_SYMBOL(__dtb_end) = .;
222 *(.data..shared_aligned) /* percpu related */ \
223 MEM_KEEP(init.data) \
224 MEM_KEEP(exit.data) \
228 /* implement dynamic printk debug */ \
230 VMLINUX_SYMBOL(__start___jump_table) = .; \
231 KEEP(*(__jump_table)) \
232 VMLINUX_SYMBOL(__stop___jump_table) = .; \
234 VMLINUX_SYMBOL(__start___verbose) = .; \
236 VMLINUX_SYMBOL(__stop___verbose) = .; \
243 * Data section helpers
245 #define NOSAVE_DATA \
246 . = ALIGN(PAGE_SIZE); \
247 VMLINUX_SYMBOL(__nosave_begin) = .; \
249 . = ALIGN(PAGE_SIZE); \
250 VMLINUX_SYMBOL(__nosave_end) = .;
252 #define PAGE_ALIGNED_DATA(page_align) \
253 . = ALIGN(page_align); \
254 *(.data..page_aligned) \
255 . = ALIGN(page_align);
257 #define READ_MOSTLY_DATA(align) \
259 *(.data..read_mostly) \
262 #define CACHELINE_ALIGNED_DATA(align) \
264 *(.data..cacheline_aligned)
266 #define INIT_TASK_DATA(align) \
268 VMLINUX_SYMBOL(__start_init_task) = .; \
269 *(.data..init_task) \
270 VMLINUX_SYMBOL(__end_init_task) = .;
273 * Allow architectures to handle ro_after_init data on their
274 * own by defining an empty RO_AFTER_INIT_DATA.
276 #ifndef RO_AFTER_INIT_DATA
277 #define RO_AFTER_INIT_DATA \
278 VMLINUX_SYMBOL(__start_ro_after_init) = .; \
279 *(.data..ro_after_init) \
280 VMLINUX_SYMBOL(__end_ro_after_init) = .;
286 #define RO_DATA_SECTION(align) \
287 . = ALIGN((align)); \
288 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \
289 VMLINUX_SYMBOL(__start_rodata) = .; \
290 *(.rodata) *(.rodata.*) \
291 RO_AFTER_INIT_DATA /* Read only after init */ \
292 KEEP(*(__vermagic)) /* Kernel version magic */ \
294 VMLINUX_SYMBOL(__start___tracepoints_ptrs) = .; \
295 KEEP(*(__tracepoints_ptrs)) /* Tracepoints: pointer array */ \
296 VMLINUX_SYMBOL(__stop___tracepoints_ptrs) = .; \
297 *(__tracepoints_strings)/* Tracepoints: strings */ \
300 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \
305 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \
306 VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \
307 KEEP(*(.pci_fixup_early)) \
308 VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \
309 VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \
310 KEEP(*(.pci_fixup_header)) \
311 VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \
312 VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \
313 KEEP(*(.pci_fixup_final)) \
314 VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \
315 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \
316 KEEP(*(.pci_fixup_enable)) \
317 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \
318 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \
319 KEEP(*(.pci_fixup_resume)) \
320 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \
321 VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \
322 KEEP(*(.pci_fixup_resume_early)) \
323 VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \
324 VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \
325 KEEP(*(.pci_fixup_suspend)) \
326 VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \
327 VMLINUX_SYMBOL(__start_pci_fixups_suspend_late) = .; \
328 KEEP(*(.pci_fixup_suspend_late)) \
329 VMLINUX_SYMBOL(__end_pci_fixups_suspend_late) = .; \
332 /* Built-in firmware blobs */ \
333 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \
334 VMLINUX_SYMBOL(__start_builtin_fw) = .; \
335 KEEP(*(.builtin_fw)) \
336 VMLINUX_SYMBOL(__end_builtin_fw) = .; \
341 /* Kernel symbol table: Normal symbols */ \
342 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \
343 VMLINUX_SYMBOL(__start___ksymtab) = .; \
344 KEEP(*(SORT(___ksymtab+*))) \
345 VMLINUX_SYMBOL(__stop___ksymtab) = .; \
348 /* Kernel symbol table: GPL-only symbols */ \
349 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \
350 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \
351 KEEP(*(SORT(___ksymtab_gpl+*))) \
352 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \
355 /* Kernel symbol table: Normal unused symbols */ \
356 __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \
357 VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \
358 KEEP(*(SORT(___ksymtab_unused+*))) \
359 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \
362 /* Kernel symbol table: GPL-only unused symbols */ \
363 __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
364 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \
365 KEEP(*(SORT(___ksymtab_unused_gpl+*))) \
366 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \
369 /* Kernel symbol table: GPL-future-only symbols */ \
370 __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
371 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \
372 KEEP(*(SORT(___ksymtab_gpl_future+*))) \
373 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \
376 /* Kernel symbol table: Normal symbols */ \
377 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \
378 VMLINUX_SYMBOL(__start___kcrctab) = .; \
379 KEEP(*(SORT(___kcrctab+*))) \
380 VMLINUX_SYMBOL(__stop___kcrctab) = .; \
383 /* Kernel symbol table: GPL-only symbols */ \
384 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \
385 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \
386 KEEP(*(SORT(___kcrctab_gpl+*))) \
387 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \
390 /* Kernel symbol table: Normal unused symbols */ \
391 __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \
392 VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \
393 KEEP(*(SORT(___kcrctab_unused+*))) \
394 VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \
397 /* Kernel symbol table: GPL-only unused symbols */ \
398 __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
399 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \
400 KEEP(*(SORT(___kcrctab_unused_gpl+*))) \
401 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \
404 /* Kernel symbol table: GPL-future-only symbols */ \
405 __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
406 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \
407 KEEP(*(SORT(___kcrctab_gpl_future+*))) \
408 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \
411 /* Kernel symbol table: strings */ \
412 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
413 *(__ksymtab_strings) \
416 /* __*init sections */ \
417 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \
419 MEM_KEEP(init.rodata) \
420 MEM_KEEP(exit.rodata) \
423 /* Built-in module parameters. */ \
424 __param : AT(ADDR(__param) - LOAD_OFFSET) { \
425 VMLINUX_SYMBOL(__start___param) = .; \
427 VMLINUX_SYMBOL(__stop___param) = .; \
430 /* Built-in module versions. */ \
431 __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \
432 VMLINUX_SYMBOL(__start___modver) = .; \
434 VMLINUX_SYMBOL(__stop___modver) = .; \
435 . = ALIGN((align)); \
436 VMLINUX_SYMBOL(__end_rodata) = .; \
440 /* RODATA & RO_DATA provided for backward compatibility.
441 * All archs are supposed to use RO_DATA() */
442 #define RODATA RO_DATA_SECTION(4096)
443 #define RO_DATA(align) RO_DATA_SECTION(align)
445 #define SECURITY_INIT \
446 .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
447 VMLINUX_SYMBOL(__security_initcall_start) = .; \
448 KEEP(*(.security_initcall.init)) \
449 VMLINUX_SYMBOL(__security_initcall_end) = .; \
453 * .text section. Map to function alignment to avoid address changes
454 * during second ld run in second ld pass when generating System.map
456 * TEXT_MAIN here will match .text.fixup and .text.unlikely if dead
457 * code elimination is enabled, so these sections should be converted
462 *(.text.hot .text.hot.*) \
463 *(TEXT_MAIN .text.fixup) \
464 *(.text.unlikely .text.unlikely.*) \
465 *(.text.unknown .text.unknown.*) \
468 *(.text.asan.* .text.tsan.*) \
469 MEM_KEEP(init.text) \
470 MEM_KEEP(exit.text) \
473 /* sched.text is aling to function alignment to secure we have same
474 * address even at second ld pass when generating System.map */
477 VMLINUX_SYMBOL(__sched_text_start) = .; \
479 VMLINUX_SYMBOL(__sched_text_end) = .;
481 /* spinlock.text is aling to function alignment to secure we have same
482 * address even at second ld pass when generating System.map */
485 VMLINUX_SYMBOL(__lock_text_start) = .; \
487 VMLINUX_SYMBOL(__lock_text_end) = .;
489 #define CPUIDLE_TEXT \
491 VMLINUX_SYMBOL(__cpuidle_text_start) = .; \
493 VMLINUX_SYMBOL(__cpuidle_text_end) = .;
495 #define KPROBES_TEXT \
497 VMLINUX_SYMBOL(__kprobes_text_start) = .; \
499 VMLINUX_SYMBOL(__kprobes_text_end) = .;
503 VMLINUX_SYMBOL(__entry_text_start) = .; \
505 VMLINUX_SYMBOL(__entry_text_end) = .;
507 #define IRQENTRY_TEXT \
509 VMLINUX_SYMBOL(__irqentry_text_start) = .; \
511 VMLINUX_SYMBOL(__irqentry_text_end) = .;
513 #define SOFTIRQENTRY_TEXT \
515 VMLINUX_SYMBOL(__softirqentry_text_start) = .; \
516 *(.softirqentry.text) \
517 VMLINUX_SYMBOL(__softirqentry_text_end) = .;
519 /* Section used for early init (in .S files) */
520 #define HEAD_TEXT *(.head.text)
522 #define HEAD_TEXT_SECTION \
523 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \
530 #define EXCEPTION_TABLE(align) \
532 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \
533 VMLINUX_SYMBOL(__start___ex_table) = .; \
534 KEEP(*(__ex_table)) \
535 VMLINUX_SYMBOL(__stop___ex_table) = .; \
541 #define INIT_TASK_DATA_SECTION(align) \
543 .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \
544 INIT_TASK_DATA(align) \
547 #ifdef CONFIG_CONSTRUCTORS
548 #define KERNEL_CTORS() . = ALIGN(8); \
549 VMLINUX_SYMBOL(__ctors_start) = .; \
551 KEEP(*(SORT(.init_array.*))) \
552 KEEP(*(.init_array)) \
553 VMLINUX_SYMBOL(__ctors_end) = .;
555 #define KERNEL_CTORS()
558 /* init and exit section handling */
560 KEEP(*(SORT(___kentry+*))) \
562 MEM_DISCARD(init.data) \
569 MEM_DISCARD(init.rodata) \
571 RESERVEDMEM_OF_TABLES() \
574 CPU_METHOD_OF_TABLES() \
575 CPUIDLE_METHOD_OF_TABLES() \
577 IRQCHIP_OF_MATCH_TABLE() \
578 ACPI_PROBE_TABLE(irqchip) \
579 ACPI_PROBE_TABLE(timer) \
580 ACPI_PROBE_TABLE(iort) \
586 MEM_DISCARD(init.text)
592 MEM_DISCARD(exit.data) \
593 MEM_DISCARD(exit.rodata)
598 MEM_DISCARD(exit.text)
604 * bss (Block Started by Symbol) - uninitialized data
605 * zeroed during startup
607 #define SBSS(sbss_align) \
608 . = ALIGN(sbss_align); \
609 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \
616 * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra
617 * sections to the front of bss.
619 #ifndef BSS_FIRST_SECTIONS
620 #define BSS_FIRST_SECTIONS
623 #define BSS(bss_align) \
624 . = ALIGN(bss_align); \
625 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \
627 . = ALIGN(PAGE_SIZE); \
628 *(.bss..page_aligned) \
629 . = ALIGN(PAGE_SIZE); \
636 * DWARF debug sections.
637 * Symbols in the DWARF debugging sections are relative to
638 * the beginning of the section so we begin them at 0.
640 #define DWARF_DEBUG \
642 .debug 0 : { *(.debug) } \
643 .line 0 : { *(.line) } \
644 /* GNU DWARF 1 extensions */ \
645 .debug_srcinfo 0 : { *(.debug_srcinfo) } \
646 .debug_sfnames 0 : { *(.debug_sfnames) } \
647 /* DWARF 1.1 and DWARF 2 */ \
648 .debug_aranges 0 : { *(.debug_aranges) } \
649 .debug_pubnames 0 : { *(.debug_pubnames) } \
651 .debug_info 0 : { *(.debug_info \
652 .gnu.linkonce.wi.*) } \
653 .debug_abbrev 0 : { *(.debug_abbrev) } \
654 .debug_line 0 : { *(.debug_line) } \
655 .debug_frame 0 : { *(.debug_frame) } \
656 .debug_str 0 : { *(.debug_str) } \
657 .debug_loc 0 : { *(.debug_loc) } \
658 .debug_macinfo 0 : { *(.debug_macinfo) } \
659 .debug_pubtypes 0 : { *(.debug_pubtypes) } \
661 .debug_ranges 0 : { *(.debug_ranges) } \
662 /* SGI/MIPS DWARF 2 extensions */ \
663 .debug_weaknames 0 : { *(.debug_weaknames) } \
664 .debug_funcnames 0 : { *(.debug_funcnames) } \
665 .debug_typenames 0 : { *(.debug_typenames) } \
666 .debug_varnames 0 : { *(.debug_varnames) } \
667 /* GNU DWARF 2 extensions */ \
668 .debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) } \
669 .debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) } \
671 .debug_types 0 : { *(.debug_types) } \
673 .debug_addr 0 : { *(.debug_addr) } \
674 .debug_line_str 0 : { *(.debug_line_str) } \
675 .debug_loclists 0 : { *(.debug_loclists) } \
676 .debug_macro 0 : { *(.debug_macro) } \
677 .debug_names 0 : { *(.debug_names) } \
678 .debug_rnglists 0 : { *(.debug_rnglists) } \
679 .debug_str_offsets 0 : { *(.debug_str_offsets) }
681 /* Stabs debugging sections. */
682 #define STABS_DEBUG \
683 .stab 0 : { *(.stab) } \
684 .stabstr 0 : { *(.stabstr) } \
685 .stab.excl 0 : { *(.stab.excl) } \
686 .stab.exclstr 0 : { *(.stab.exclstr) } \
687 .stab.index 0 : { *(.stab.index) } \
688 .stab.indexstr 0 : { *(.stab.indexstr) } \
689 .comment 0 : { *(.comment) }
691 #ifdef CONFIG_GENERIC_BUG
694 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \
695 VMLINUX_SYMBOL(__start___bug_table) = .; \
696 KEEP(*(__bug_table)) \
697 VMLINUX_SYMBOL(__stop___bug_table) = .; \
703 #ifdef CONFIG_UNWINDER_ORC
704 #define ORC_UNWIND_TABLE \
706 .orc_unwind_ip : AT(ADDR(.orc_unwind_ip) - LOAD_OFFSET) { \
707 VMLINUX_SYMBOL(__start_orc_unwind_ip) = .; \
708 KEEP(*(.orc_unwind_ip)) \
709 VMLINUX_SYMBOL(__stop_orc_unwind_ip) = .; \
712 .orc_unwind : AT(ADDR(.orc_unwind) - LOAD_OFFSET) { \
713 VMLINUX_SYMBOL(__start_orc_unwind) = .; \
714 KEEP(*(.orc_unwind)) \
715 VMLINUX_SYMBOL(__stop_orc_unwind) = .; \
718 .orc_lookup : AT(ADDR(.orc_lookup) - LOAD_OFFSET) { \
719 VMLINUX_SYMBOL(orc_lookup) = .; \
720 . += (((SIZEOF(.text) + LOOKUP_BLOCK_SIZE - 1) / \
721 LOOKUP_BLOCK_SIZE) + 1) * 4; \
722 VMLINUX_SYMBOL(orc_lookup_end) = .; \
725 #define ORC_UNWIND_TABLE
728 #ifdef CONFIG_PM_TRACE
731 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \
732 VMLINUX_SYMBOL(__tracedata_start) = .; \
733 KEEP(*(.tracedata)) \
734 VMLINUX_SYMBOL(__tracedata_end) = .; \
741 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \
742 VMLINUX_SYMBOL(__start_notes) = .; \
744 VMLINUX_SYMBOL(__stop_notes) = .; \
747 #define INIT_SETUP(initsetup_align) \
748 . = ALIGN(initsetup_align); \
749 VMLINUX_SYMBOL(__setup_start) = .; \
750 KEEP(*(.init.setup)) \
751 VMLINUX_SYMBOL(__setup_end) = .;
753 #define INIT_CALLS_LEVEL(level) \
754 VMLINUX_SYMBOL(__initcall##level##_start) = .; \
755 KEEP(*(.initcall##level##.init)) \
756 KEEP(*(.initcall##level##s.init)) \
759 VMLINUX_SYMBOL(__initcall_start) = .; \
760 KEEP(*(.initcallearly.init)) \
761 INIT_CALLS_LEVEL(0) \
762 INIT_CALLS_LEVEL(1) \
763 INIT_CALLS_LEVEL(2) \
764 INIT_CALLS_LEVEL(3) \
765 INIT_CALLS_LEVEL(4) \
766 INIT_CALLS_LEVEL(5) \
767 INIT_CALLS_LEVEL(rootfs) \
768 INIT_CALLS_LEVEL(6) \
769 INIT_CALLS_LEVEL(7) \
770 VMLINUX_SYMBOL(__initcall_end) = .;
772 #define CON_INITCALL \
773 VMLINUX_SYMBOL(__con_initcall_start) = .; \
774 KEEP(*(.con_initcall.init)) \
775 VMLINUX_SYMBOL(__con_initcall_end) = .;
777 #define SECURITY_INITCALL \
778 VMLINUX_SYMBOL(__security_initcall_start) = .; \
779 KEEP(*(.security_initcall.init)) \
780 VMLINUX_SYMBOL(__security_initcall_end) = .;
782 #ifdef CONFIG_BLK_DEV_INITRD
783 #define INIT_RAM_FS \
785 VMLINUX_SYMBOL(__initramfs_start) = .; \
786 KEEP(*(.init.ramfs)) \
788 KEEP(*(.init.ramfs.info))
794 * Default discarded sections.
796 * Some archs want to discard exit text/data at runtime rather than
797 * link time due to cross-section references such as alt instructions,
798 * bug table, eh_frame, etc. DISCARDS must be the last of output
799 * section definitions so that such archs put those in earlier section
812 * PERCPU_INPUT - the percpu input sections
813 * @cacheline: cacheline size
815 * The core percpu section names and core symbols which do not rely
816 * directly upon load addresses.
818 * @cacheline is used to align subsections to avoid false cacheline
819 * sharing between subsections for different purposes.
821 #define PERCPU_INPUT(cacheline) \
822 VMLINUX_SYMBOL(__per_cpu_start) = .; \
823 *(.data..percpu..first) \
824 . = ALIGN(PAGE_SIZE); \
825 *(.data..percpu..page_aligned) \
826 . = ALIGN(cacheline); \
827 *(.data..percpu..read_mostly) \
828 . = ALIGN(cacheline); \
830 *(.data..percpu..shared_aligned) \
831 VMLINUX_SYMBOL(__per_cpu_end) = .;
834 * PERCPU_VADDR - define output section for percpu area
835 * @cacheline: cacheline size
836 * @vaddr: explicit base address (optional)
837 * @phdr: destination PHDR (optional)
839 * Macro which expands to output section for percpu area.
841 * @cacheline is used to align subsections to avoid false cacheline
842 * sharing between subsections for different purposes.
844 * If @vaddr is not blank, it specifies explicit base address and all
845 * percpu symbols will be offset from the given address. If blank,
846 * @vaddr always equals @laddr + LOAD_OFFSET.
848 * @phdr defines the output PHDR to use if not blank. Be warned that
849 * output PHDR is sticky. If @phdr is specified, the next output
850 * section in the linker script will go there too. @phdr should have
853 * Note that this macros defines __per_cpu_load as an absolute symbol.
854 * If there is no need to put the percpu section at a predetermined
855 * address, use PERCPU_SECTION.
857 #define PERCPU_VADDR(cacheline, vaddr, phdr) \
858 VMLINUX_SYMBOL(__per_cpu_load) = .; \
859 .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \
861 PERCPU_INPUT(cacheline) \
863 . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu);
866 * PERCPU_SECTION - define output section for percpu area, simple version
867 * @cacheline: cacheline size
869 * Align to PAGE_SIZE and outputs output section for percpu area. This
870 * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and
871 * __per_cpu_start will be identical.
873 * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,)
874 * except that __per_cpu_load is defined as a relative symbol against
875 * .data..percpu which is required for relocatable x86_32 configuration.
877 #define PERCPU_SECTION(cacheline) \
878 . = ALIGN(PAGE_SIZE); \
879 .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \
880 VMLINUX_SYMBOL(__per_cpu_load) = .; \
881 PERCPU_INPUT(cacheline) \
886 * Definition of the high level *_SECTION macros
887 * They will fit only a subset of the architectures
893 * All sections are combined in a single .data section.
894 * The sections following CONSTRUCTORS are arranged so their
895 * typical alignment matches.
896 * A cacheline is typical/always less than a PAGE_SIZE so
897 * the sections that has this restriction (or similar)
898 * is located before the ones requiring PAGE_SIZE alignment.
899 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
900 * matches the requirement of PAGE_ALIGNED_DATA.
902 * use 0 as page_align if page_aligned data is not used */
903 #define RW_DATA_SECTION(cacheline, pagealigned, inittask) \
904 . = ALIGN(PAGE_SIZE); \
905 .data : AT(ADDR(.data) - LOAD_OFFSET) { \
906 INIT_TASK_DATA(inittask) \
908 PAGE_ALIGNED_DATA(pagealigned) \
909 CACHELINE_ALIGNED_DATA(cacheline) \
910 READ_MOSTLY_DATA(cacheline) \
916 #define INIT_TEXT_SECTION(inittext_align) \
917 . = ALIGN(inittext_align); \
918 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \
919 VMLINUX_SYMBOL(_sinittext) = .; \
921 VMLINUX_SYMBOL(_einittext) = .; \
924 #define INIT_DATA_SECTION(initsetup_align) \
925 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \
927 INIT_SETUP(initsetup_align) \
934 #define BSS_SECTION(sbss_align, bss_align, stop_align) \
935 . = ALIGN(sbss_align); \
936 VMLINUX_SYMBOL(__bss_start) = .; \
939 . = ALIGN(stop_align); \
940 VMLINUX_SYMBOL(__bss_stop) = .;