vmlinux.lds.h (eff8728fe69880d3f7983bec3fb6cea4c306261f) vmlinux.lds.h (9183c3f9ed710a8edf1a61e8a96d497258d26e08)
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(...)

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29 *
30 * EXCEPTION_TABLE(...)
31 *
32 * BSS_SECTION(0, 0, 0)
33 * _end = .;
34 *
35 * STABS_DEBUG
36 * DWARF_DEBUG
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(...)

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29 *
30 * EXCEPTION_TABLE(...)
31 *
32 * BSS_SECTION(0, 0, 0)
33 * _end = .;
34 *
35 * STABS_DEBUG
36 * DWARF_DEBUG
37 * ELF_DETAILS
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

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384 __end_init_task = .;
385
386#define JUMP_TABLE_DATA \
387 . = ALIGN(8); \
388 __start___jump_table = .; \
389 KEEP(*(__jump_table)) \
390 __stop___jump_table = .;
391
37 *
38 * DISCARDS // must be the last
39 * }
40 *
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

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383 __end_init_task = .;
384
385#define JUMP_TABLE_DATA \
386 . = ALIGN(8); \
387 __start___jump_table = .; \
388 KEEP(*(__jump_table)) \
389 __stop___jump_table = .;
390
391#define STATIC_CALL_DATA \
392 . = ALIGN(8); \
393 __start_static_call_sites = .; \
394 KEEP(*(.static_call_sites)) \
395 __stop_static_call_sites = .;
396
392/*
393 * Allow architectures to handle ro_after_init data on their
394 * own by defining an empty RO_AFTER_INIT_DATA.
395 */
396#ifndef RO_AFTER_INIT_DATA
397#define RO_AFTER_INIT_DATA \
397/*
398 * Allow architectures to handle ro_after_init data on their
399 * own by defining an empty RO_AFTER_INIT_DATA.
400 */
401#ifndef RO_AFTER_INIT_DATA
402#define RO_AFTER_INIT_DATA \
403 . = ALIGN(8); \
398 __start_ro_after_init = .; \
399 *(.data..ro_after_init) \
400 JUMP_TABLE_DATA \
404 __start_ro_after_init = .; \
405 *(.data..ro_after_init) \
406 JUMP_TABLE_DATA \
407 STATIC_CALL_DATA \
401 __end_ro_after_init = .;
402#endif
403
404/*
405 * Read only Data
406 */
407#define RO_DATA(align) \
408 . = ALIGN((align)); \

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576 * during second ld run in second ld pass when generating System.map
577 *
578 * TEXT_MAIN here will match .text.fixup and .text.unlikely if dead
579 * code elimination is enabled, so these sections should be converted
580 * to use ".." first.
581 */
582#define TEXT_TEXT \
583 ALIGN_FUNCTION(); \
408 __end_ro_after_init = .;
409#endif
410
411/*
412 * Read only Data
413 */
414#define RO_DATA(align) \
415 . = ALIGN((align)); \

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583 * during second ld run in second ld pass when generating System.map
584 *
585 * TEXT_MAIN here will match .text.fixup and .text.unlikely if dead
586 * code elimination is enabled, so these sections should be converted
587 * to use ".." first.
588 */
589#define TEXT_TEXT \
590 ALIGN_FUNCTION(); \
584 *(.text.hot .text.hot.*) \
585 *(TEXT_MAIN .text.fixup) \
586 *(.text.unlikely .text.unlikely.*) \
587 *(.text.unknown .text.unknown.*) \
591 *(.text.hot TEXT_MAIN .text.fixup .text.unlikely) \
588 NOINSTR_TEXT \
589 *(.text..refcount) \
590 *(.ref.text) \
591 MEM_KEEP(init.text*) \
592 MEM_KEEP(exit.text*) \
593
594
595/* sched.text is aling to function alignment to secure we have same

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810 .debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) } \
811 .debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) } \
812 /* DWARF 4 */ \
813 .debug_types 0 : { *(.debug_types) } \
814 /* DWARF 5 */ \
815 .debug_macro 0 : { *(.debug_macro) } \
816 .debug_addr 0 : { *(.debug_addr) }
817
592 NOINSTR_TEXT \
593 *(.text..refcount) \
594 *(.ref.text) \
595 MEM_KEEP(init.text*) \
596 MEM_KEEP(exit.text*) \
597
598
599/* sched.text is aling to function alignment to secure we have same

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814 .debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) } \
815 .debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) } \
816 /* DWARF 4 */ \
817 .debug_types 0 : { *(.debug_types) } \
818 /* DWARF 5 */ \
819 .debug_macro 0 : { *(.debug_macro) } \
820 .debug_addr 0 : { *(.debug_addr) }
821
818/* Stabs debugging sections. */
822 /* Stabs debugging sections. */
819#define STABS_DEBUG \
820 .stab 0 : { *(.stab) } \
821 .stabstr 0 : { *(.stabstr) } \
822 .stab.excl 0 : { *(.stab.excl) } \
823 .stab.exclstr 0 : { *(.stab.exclstr) } \
824 .stab.index 0 : { *(.stab.index) } \
823#define STABS_DEBUG \
824 .stab 0 : { *(.stab) } \
825 .stabstr 0 : { *(.stabstr) } \
826 .stab.excl 0 : { *(.stab.excl) } \
827 .stab.exclstr 0 : { *(.stab.exclstr) } \
828 .stab.index 0 : { *(.stab.index) } \
825 .stab.indexstr 0 : { *(.stab.indexstr) }
829 .stab.indexstr 0 : { *(.stab.indexstr) } \
830 .comment 0 : { *(.comment) }
826
831
827/* Required sections not related to debugging. */
828#define ELF_DETAILS \
829 .comment 0 : { *(.comment) } \
830 .symtab 0 : { *(.symtab) } \
831 .strtab 0 : { *(.strtab) } \
832 .shstrtab 0 : { *(.shstrtab) }
833
834#ifdef CONFIG_GENERIC_BUG
835#define BUG_TABLE \
836 . = ALIGN(8); \
837 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \
838 __start___bug_table = .; \
839 KEEP(*(__bug_table)) \
840 __stop___bug_table = .; \
841 }

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959#ifdef RUNTIME_DISCARD_EXIT
960#define EXIT_DISCARDS
961#else
962#define EXIT_DISCARDS \
963 EXIT_TEXT \
964 EXIT_DATA
965#endif
966
832#ifdef CONFIG_GENERIC_BUG
833#define BUG_TABLE \
834 . = ALIGN(8); \
835 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \
836 __start___bug_table = .; \
837 KEEP(*(__bug_table)) \
838 __stop___bug_table = .; \
839 }

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957#ifdef RUNTIME_DISCARD_EXIT
958#define EXIT_DISCARDS
959#else
960#define EXIT_DISCARDS \
961 EXIT_TEXT \
962 EXIT_DATA
963#endif
964
967/*
968 * Clang's -fsanitize=kernel-address and -fsanitize=thread produce
969 * unwanted sections (.eh_frame and .init_array.*), but
970 * CONFIG_CONSTRUCTORS wants to keep any .init_array.* sections.
971 * https://bugs.llvm.org/show_bug.cgi?id=46478
972 */
973#if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KCSAN)
974# ifdef CONFIG_CONSTRUCTORS
975# define SANITIZER_DISCARDS \
976 *(.eh_frame)
977# else
978# define SANITIZER_DISCARDS \
979 *(.init_array) *(.init_array.*) \
980 *(.eh_frame)
981# endif
982#else
983# define SANITIZER_DISCARDS
984#endif
985
986#define COMMON_DISCARDS \
987 SANITIZER_DISCARDS \
988 *(.discard) \
989 *(.discard.*) \
990 *(.modinfo) \
991 /* ld.bfd warns about .gnu.version* even when not emitted */ \
992 *(.gnu.version*) \
993
994#define DISCARDS \
995 /DISCARD/ : { \
996 EXIT_DISCARDS \
997 EXIT_CALL \
965#define DISCARDS \
966 /DISCARD/ : { \
967 EXIT_DISCARDS \
968 EXIT_CALL \
998 COMMON_DISCARDS \
969 *(.discard) \
970 *(.discard.*) \
971 *(.modinfo) \
999 }
1000
1001/**
1002 * PERCPU_INPUT - the percpu input sections
1003 * @cacheline: cacheline size
1004 *
1005 * The core percpu section names and core symbols which do not rely
1006 * directly upon load addresses.

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973
974/**
975 * PERCPU_INPUT - the percpu input sections
976 * @cacheline: cacheline size
977 *
978 * The core percpu section names and core symbols which do not rely
979 * directly upon load addresses.

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