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 requirements] 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(PAGE_SIZE) 27 * RW_DATA(...) 28 * _edata = .; 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 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 #include <asm-generic/codetag.lds.h> 54 55 #ifndef LOAD_OFFSET 56 #define LOAD_OFFSET 0 57 #endif 58 59 /* 60 * Only some architectures want to have the .notes segment visible in 61 * a separate PT_NOTE ELF Program Header. When this happens, it needs 62 * to be visible in both the kernel text's PT_LOAD and the PT_NOTE 63 * Program Headers. In this case, though, the PT_LOAD needs to be made 64 * the default again so that all the following sections don't also end 65 * up in the PT_NOTE Program Header. 66 */ 67 #ifdef EMITS_PT_NOTE 68 #define NOTES_HEADERS :text :note 69 #define NOTES_HEADERS_RESTORE __restore_ph : { *(.__restore_ph) } :text 70 #else 71 #define NOTES_HEADERS 72 #define NOTES_HEADERS_RESTORE 73 #endif 74 75 /* 76 * Some architectures have non-executable read-only exception tables. 77 * They can be added to the RO_DATA segment by specifying their desired 78 * alignment. 79 */ 80 #ifdef RO_EXCEPTION_TABLE_ALIGN 81 #define RO_EXCEPTION_TABLE EXCEPTION_TABLE(RO_EXCEPTION_TABLE_ALIGN) 82 #else 83 #define RO_EXCEPTION_TABLE 84 #endif 85 86 /* Align . function alignment. */ 87 #define ALIGN_FUNCTION() . = ALIGN(CONFIG_FUNCTION_ALIGNMENT) 88 89 /* 90 * LD_DEAD_CODE_DATA_ELIMINATION option enables -fdata-sections, which 91 * generates .data.identifier sections, which need to be pulled in with 92 * .data. We don't want to pull in .data..other sections, which Linux 93 * has defined. Same for text and bss. 94 * 95 * With LTO_CLANG, the linker also splits sections by default, so we need 96 * these macros to combine the sections during the final link. 97 * 98 * RODATA_MAIN is not used because existing code already defines .rodata.x 99 * sections to be brought in with rodata. 100 */ 101 #if defined(CONFIG_LD_DEAD_CODE_DATA_ELIMINATION) || defined(CONFIG_LTO_CLANG) 102 #define TEXT_MAIN .text .text.[0-9a-zA-Z_]* 103 #define DATA_MAIN .data .data.[0-9a-zA-Z_]* .data..L* .data..compoundliteral* .data.$__unnamed_* .data.$L* 104 #define SDATA_MAIN .sdata .sdata.[0-9a-zA-Z_]* 105 #define RODATA_MAIN .rodata .rodata.[0-9a-zA-Z_]* .rodata..L* 106 #define BSS_MAIN .bss .bss.[0-9a-zA-Z_]* .bss..compoundliteral* 107 #define SBSS_MAIN .sbss .sbss.[0-9a-zA-Z_]* 108 #else 109 #define TEXT_MAIN .text 110 #define DATA_MAIN .data 111 #define SDATA_MAIN .sdata 112 #define RODATA_MAIN .rodata 113 #define BSS_MAIN .bss 114 #define SBSS_MAIN .sbss 115 #endif 116 117 /* 118 * GCC 4.5 and later have a 32 bytes section alignment for structures. 119 * Except GCC 4.9, that feels the need to align on 64 bytes. 120 */ 121 #define STRUCT_ALIGNMENT 32 122 #define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT) 123 124 /* 125 * The order of the sched class addresses are important, as they are 126 * used to determine the order of the priority of each sched class in 127 * relation to each other. 128 */ 129 #define SCHED_DATA \ 130 STRUCT_ALIGN(); \ 131 __sched_class_highest = .; \ 132 *(__stop_sched_class) \ 133 *(__dl_sched_class) \ 134 *(__rt_sched_class) \ 135 *(__fair_sched_class) \ 136 *(__ext_sched_class) \ 137 *(__idle_sched_class) \ 138 __sched_class_lowest = .; 139 140 /* The actual configuration determine if the init/exit sections 141 * are handled as text/data or they can be discarded (which 142 * often happens at runtime) 143 */ 144 145 #if defined(CONFIG_MEMORY_HOTPLUG) 146 #define MEM_KEEP(sec) *(.mem##sec) 147 #define MEM_DISCARD(sec) 148 #else 149 #define MEM_KEEP(sec) 150 #define MEM_DISCARD(sec) *(.mem##sec) 151 #endif 152 153 #ifndef CONFIG_HAVE_DYNAMIC_FTRACE_NO_PATCHABLE 154 #define KEEP_PATCHABLE KEEP(*(__patchable_function_entries)) 155 #define PATCHABLE_DISCARDS 156 #else 157 #define KEEP_PATCHABLE 158 #define PATCHABLE_DISCARDS *(__patchable_function_entries) 159 #endif 160 161 #ifndef CONFIG_ARCH_SUPPORTS_CFI_CLANG 162 /* 163 * Simply points to ftrace_stub, but with the proper protocol. 164 * Defined by the linker script in linux/vmlinux.lds.h 165 */ 166 #define FTRACE_STUB_HACK ftrace_stub_graph = ftrace_stub; 167 #else 168 #define FTRACE_STUB_HACK 169 #endif 170 171 #ifdef CONFIG_FTRACE_MCOUNT_RECORD 172 /* 173 * The ftrace call sites are logged to a section whose name depends on the 174 * compiler option used. A given kernel image will only use one, AKA 175 * FTRACE_CALLSITE_SECTION. We capture all of them here to avoid header 176 * dependencies for FTRACE_CALLSITE_SECTION's definition. 177 * 178 * ftrace_ops_list_func will be defined as arch_ftrace_ops_list_func 179 * as some archs will have a different prototype for that function 180 * but ftrace_ops_list_func() will have a single prototype. 181 */ 182 #define MCOUNT_REC() . = ALIGN(8); \ 183 __start_mcount_loc = .; \ 184 KEEP(*(__mcount_loc)) \ 185 KEEP_PATCHABLE \ 186 __stop_mcount_loc = .; \ 187 FTRACE_STUB_HACK \ 188 ftrace_ops_list_func = arch_ftrace_ops_list_func; 189 #else 190 # ifdef CONFIG_FUNCTION_TRACER 191 # define MCOUNT_REC() FTRACE_STUB_HACK \ 192 ftrace_ops_list_func = arch_ftrace_ops_list_func; 193 # else 194 # define MCOUNT_REC() 195 # endif 196 #endif 197 198 #define BOUNDED_SECTION_PRE_LABEL(_sec_, _label_, _BEGIN_, _END_) \ 199 _BEGIN_##_label_ = .; \ 200 KEEP(*(_sec_)) \ 201 _END_##_label_ = .; 202 203 #define BOUNDED_SECTION_POST_LABEL(_sec_, _label_, _BEGIN_, _END_) \ 204 _label_##_BEGIN_ = .; \ 205 KEEP(*(_sec_)) \ 206 _label_##_END_ = .; 207 208 #define BOUNDED_SECTION_BY(_sec_, _label_) \ 209 BOUNDED_SECTION_PRE_LABEL(_sec_, _label_, __start, __stop) 210 211 #define BOUNDED_SECTION(_sec) BOUNDED_SECTION_BY(_sec, _sec) 212 213 #define HEADERED_SECTION_PRE_LABEL(_sec_, _label_, _BEGIN_, _END_, _HDR_) \ 214 _HDR_##_label_ = .; \ 215 KEEP(*(.gnu.linkonce.##_sec_)) \ 216 BOUNDED_SECTION_PRE_LABEL(_sec_, _label_, _BEGIN_, _END_) 217 218 #define HEADERED_SECTION_POST_LABEL(_sec_, _label_, _BEGIN_, _END_, _HDR_) \ 219 _label_##_HDR_ = .; \ 220 KEEP(*(.gnu.linkonce.##_sec_)) \ 221 BOUNDED_SECTION_POST_LABEL(_sec_, _label_, _BEGIN_, _END_) 222 223 #define HEADERED_SECTION_BY(_sec_, _label_) \ 224 HEADERED_SECTION_PRE_LABEL(_sec_, _label_, __start, __stop) 225 226 #define HEADERED_SECTION(_sec) HEADERED_SECTION_BY(_sec, _sec) 227 228 #ifdef CONFIG_TRACE_BRANCH_PROFILING 229 #define LIKELY_PROFILE() \ 230 BOUNDED_SECTION_BY(_ftrace_annotated_branch, _annotated_branch_profile) 231 #else 232 #define LIKELY_PROFILE() 233 #endif 234 235 #ifdef CONFIG_PROFILE_ALL_BRANCHES 236 #define BRANCH_PROFILE() \ 237 BOUNDED_SECTION_BY(_ftrace_branch, _branch_profile) 238 #else 239 #define BRANCH_PROFILE() 240 #endif 241 242 #ifdef CONFIG_KPROBES 243 #define KPROBE_BLACKLIST() \ 244 . = ALIGN(8); \ 245 BOUNDED_SECTION(_kprobe_blacklist) 246 #else 247 #define KPROBE_BLACKLIST() 248 #endif 249 250 #ifdef CONFIG_FUNCTION_ERROR_INJECTION 251 #define ERROR_INJECT_WHITELIST() \ 252 STRUCT_ALIGN(); \ 253 BOUNDED_SECTION(_error_injection_whitelist) 254 #else 255 #define ERROR_INJECT_WHITELIST() 256 #endif 257 258 #ifdef CONFIG_EVENT_TRACING 259 #define FTRACE_EVENTS() \ 260 . = ALIGN(8); \ 261 BOUNDED_SECTION(_ftrace_events) \ 262 BOUNDED_SECTION_BY(_ftrace_eval_map, _ftrace_eval_maps) 263 #else 264 #define FTRACE_EVENTS() 265 #endif 266 267 #ifdef CONFIG_TRACING 268 #define TRACE_PRINTKS() BOUNDED_SECTION_BY(__trace_printk_fmt, ___trace_bprintk_fmt) 269 #define TRACEPOINT_STR() BOUNDED_SECTION_BY(__tracepoint_str, ___tracepoint_str) 270 #else 271 #define TRACE_PRINTKS() 272 #define TRACEPOINT_STR() 273 #endif 274 275 #ifdef CONFIG_FTRACE_SYSCALLS 276 #define TRACE_SYSCALLS() \ 277 . = ALIGN(8); \ 278 BOUNDED_SECTION_BY(__syscalls_metadata, _syscalls_metadata) 279 #else 280 #define TRACE_SYSCALLS() 281 #endif 282 283 #ifdef CONFIG_BPF_EVENTS 284 #define BPF_RAW_TP() STRUCT_ALIGN(); \ 285 BOUNDED_SECTION_BY(__bpf_raw_tp_map, __bpf_raw_tp) 286 #else 287 #define BPF_RAW_TP() 288 #endif 289 290 #ifdef CONFIG_SERIAL_EARLYCON 291 #define EARLYCON_TABLE() \ 292 . = ALIGN(8); \ 293 BOUNDED_SECTION_POST_LABEL(__earlycon_table, __earlycon_table, , _end) 294 #else 295 #define EARLYCON_TABLE() 296 #endif 297 298 #ifdef CONFIG_SECURITY 299 #define LSM_TABLE() \ 300 . = ALIGN(8); \ 301 BOUNDED_SECTION_PRE_LABEL(.lsm_info.init, _lsm_info, __start, __end) 302 303 #define EARLY_LSM_TABLE() \ 304 . = ALIGN(8); \ 305 BOUNDED_SECTION_PRE_LABEL(.early_lsm_info.init, _early_lsm_info, __start, __end) 306 #else 307 #define LSM_TABLE() 308 #define EARLY_LSM_TABLE() 309 #endif 310 311 #define ___OF_TABLE(cfg, name) _OF_TABLE_##cfg(name) 312 #define __OF_TABLE(cfg, name) ___OF_TABLE(cfg, name) 313 #define OF_TABLE(cfg, name) __OF_TABLE(IS_ENABLED(cfg), name) 314 #define _OF_TABLE_0(name) 315 #define _OF_TABLE_1(name) \ 316 . = ALIGN(8); \ 317 __##name##_of_table = .; \ 318 KEEP(*(__##name##_of_table)) \ 319 KEEP(*(__##name##_of_table_end)) 320 321 #define TIMER_OF_TABLES() OF_TABLE(CONFIG_TIMER_OF, timer) 322 #define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip) 323 #define CLK_OF_TABLES() OF_TABLE(CONFIG_COMMON_CLK, clk) 324 #define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem) 325 #define CPU_METHOD_OF_TABLES() OF_TABLE(CONFIG_SMP, cpu_method) 326 #define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method) 327 328 #ifdef CONFIG_ACPI 329 #define ACPI_PROBE_TABLE(name) \ 330 . = ALIGN(8); \ 331 BOUNDED_SECTION_POST_LABEL(__##name##_acpi_probe_table, \ 332 __##name##_acpi_probe_table,, _end) 333 #else 334 #define ACPI_PROBE_TABLE(name) 335 #endif 336 337 #ifdef CONFIG_THERMAL 338 #define THERMAL_TABLE(name) \ 339 . = ALIGN(8); \ 340 BOUNDED_SECTION_POST_LABEL(__##name##_thermal_table, \ 341 __##name##_thermal_table,, _end) 342 #else 343 #define THERMAL_TABLE(name) 344 #endif 345 346 #define KERNEL_DTB() \ 347 STRUCT_ALIGN(); \ 348 __dtb_start = .; \ 349 KEEP(*(.dtb.init.rodata)) \ 350 __dtb_end = .; 351 352 /* 353 * .data section 354 */ 355 #define DATA_DATA \ 356 *(.xiptext) \ 357 *(DATA_MAIN) \ 358 *(.data..decrypted) \ 359 *(.ref.data) \ 360 *(.data..shared_aligned) /* percpu related */ \ 361 MEM_KEEP(init.data*) \ 362 *(.data.unlikely) \ 363 __start_once = .; \ 364 *(.data.once) \ 365 __end_once = .; \ 366 STRUCT_ALIGN(); \ 367 *(__tracepoints) \ 368 /* implement dynamic printk debug */ \ 369 . = ALIGN(8); \ 370 BOUNDED_SECTION_BY(__dyndbg_classes, ___dyndbg_classes) \ 371 BOUNDED_SECTION_BY(__dyndbg, ___dyndbg) \ 372 CODETAG_SECTIONS() \ 373 LIKELY_PROFILE() \ 374 BRANCH_PROFILE() \ 375 TRACE_PRINTKS() \ 376 BPF_RAW_TP() \ 377 TRACEPOINT_STR() \ 378 KUNIT_TABLE() 379 380 /* 381 * Data section helpers 382 */ 383 #define NOSAVE_DATA \ 384 . = ALIGN(PAGE_SIZE); \ 385 __nosave_begin = .; \ 386 *(.data..nosave) \ 387 . = ALIGN(PAGE_SIZE); \ 388 __nosave_end = .; 389 390 #define PAGE_ALIGNED_DATA(page_align) \ 391 . = ALIGN(page_align); \ 392 *(.data..page_aligned) \ 393 . = ALIGN(page_align); 394 395 #define READ_MOSTLY_DATA(align) \ 396 . = ALIGN(align); \ 397 *(.data..read_mostly) \ 398 . = ALIGN(align); 399 400 #define CACHELINE_ALIGNED_DATA(align) \ 401 . = ALIGN(align); \ 402 *(.data..cacheline_aligned) 403 404 #define INIT_TASK_DATA(align) \ 405 . = ALIGN(align); \ 406 __start_init_stack = .; \ 407 init_thread_union = .; \ 408 init_stack = .; \ 409 KEEP(*(.data..init_task)) \ 410 KEEP(*(.data..init_thread_info)) \ 411 . = __start_init_stack + THREAD_SIZE; \ 412 __end_init_stack = .; 413 414 #define JUMP_TABLE_DATA \ 415 . = ALIGN(8); \ 416 BOUNDED_SECTION_BY(__jump_table, ___jump_table) 417 418 #ifdef CONFIG_HAVE_STATIC_CALL_INLINE 419 #define STATIC_CALL_DATA \ 420 . = ALIGN(8); \ 421 BOUNDED_SECTION_BY(.static_call_sites, _static_call_sites) \ 422 BOUNDED_SECTION_BY(.static_call_tramp_key, _static_call_tramp_key) 423 #else 424 #define STATIC_CALL_DATA 425 #endif 426 427 /* 428 * Allow architectures to handle ro_after_init data on their 429 * own by defining an empty RO_AFTER_INIT_DATA. 430 */ 431 #ifndef RO_AFTER_INIT_DATA 432 #define RO_AFTER_INIT_DATA \ 433 . = ALIGN(8); \ 434 __start_ro_after_init = .; \ 435 *(.data..ro_after_init) \ 436 JUMP_TABLE_DATA \ 437 STATIC_CALL_DATA \ 438 __end_ro_after_init = .; 439 #endif 440 441 /* 442 * .kcfi_traps contains a list KCFI trap locations. 443 */ 444 #ifndef KCFI_TRAPS 445 #ifdef CONFIG_ARCH_USES_CFI_TRAPS 446 #define KCFI_TRAPS \ 447 __kcfi_traps : AT(ADDR(__kcfi_traps) - LOAD_OFFSET) { \ 448 BOUNDED_SECTION_BY(.kcfi_traps, ___kcfi_traps) \ 449 } 450 #else 451 #define KCFI_TRAPS 452 #endif 453 #endif 454 455 /* 456 * Some symbol definitions will not exist yet during the first pass of the 457 * link, but are guaranteed to exist in the final link. Provide preliminary 458 * definitions that will be superseded in the final link to avoid having to 459 * rely on weak external linkage, which requires a GOT when used in position 460 * independent code. 461 */ 462 #define PRELIMINARY_SYMBOL_DEFINITIONS \ 463 PROVIDE(kallsyms_addresses = .); \ 464 PROVIDE(kallsyms_offsets = .); \ 465 PROVIDE(kallsyms_names = .); \ 466 PROVIDE(kallsyms_num_syms = .); \ 467 PROVIDE(kallsyms_relative_base = .); \ 468 PROVIDE(kallsyms_token_table = .); \ 469 PROVIDE(kallsyms_token_index = .); \ 470 PROVIDE(kallsyms_markers = .); \ 471 PROVIDE(kallsyms_seqs_of_names = .); 472 473 /* 474 * Read only Data 475 */ 476 #define RO_DATA(align) \ 477 . = ALIGN((align)); \ 478 PRELIMINARY_SYMBOL_DEFINITIONS \ 479 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \ 480 __start_rodata = .; \ 481 *(.rodata) *(.rodata.*) \ 482 SCHED_DATA \ 483 RO_AFTER_INIT_DATA /* Read only after init */ \ 484 . = ALIGN(8); \ 485 BOUNDED_SECTION_BY(__tracepoints_ptrs, ___tracepoints_ptrs) \ 486 *(__tracepoints_strings)/* Tracepoints: strings */ \ 487 } \ 488 \ 489 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \ 490 *(.rodata1) \ 491 } \ 492 \ 493 /* PCI quirks */ \ 494 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \ 495 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_early, _pci_fixups_early, __start, __end) \ 496 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_header, _pci_fixups_header, __start, __end) \ 497 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_final, _pci_fixups_final, __start, __end) \ 498 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_enable, _pci_fixups_enable, __start, __end) \ 499 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_resume, _pci_fixups_resume, __start, __end) \ 500 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_suspend, _pci_fixups_suspend, __start, __end) \ 501 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_resume_early, _pci_fixups_resume_early, __start, __end) \ 502 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_suspend_late, _pci_fixups_suspend_late, __start, __end) \ 503 } \ 504 \ 505 FW_LOADER_BUILT_IN_DATA \ 506 TRACEDATA \ 507 \ 508 PRINTK_INDEX \ 509 \ 510 /* Kernel symbol table: Normal symbols */ \ 511 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \ 512 __start___ksymtab = .; \ 513 KEEP(*(SORT(___ksymtab+*))) \ 514 __stop___ksymtab = .; \ 515 } \ 516 \ 517 /* Kernel symbol table: GPL-only symbols */ \ 518 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \ 519 __start___ksymtab_gpl = .; \ 520 KEEP(*(SORT(___ksymtab_gpl+*))) \ 521 __stop___ksymtab_gpl = .; \ 522 } \ 523 \ 524 /* Kernel symbol table: Normal symbols */ \ 525 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \ 526 __start___kcrctab = .; \ 527 KEEP(*(SORT(___kcrctab+*))) \ 528 __stop___kcrctab = .; \ 529 } \ 530 \ 531 /* Kernel symbol table: GPL-only symbols */ \ 532 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \ 533 __start___kcrctab_gpl = .; \ 534 KEEP(*(SORT(___kcrctab_gpl+*))) \ 535 __stop___kcrctab_gpl = .; \ 536 } \ 537 \ 538 /* Kernel symbol table: strings */ \ 539 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \ 540 *(__ksymtab_strings) \ 541 } \ 542 \ 543 /* __*init sections */ \ 544 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \ 545 *(.ref.rodata) \ 546 MEM_KEEP(init.rodata) \ 547 } \ 548 \ 549 /* Built-in module parameters. */ \ 550 __param : AT(ADDR(__param) - LOAD_OFFSET) { \ 551 BOUNDED_SECTION_BY(__param, ___param) \ 552 } \ 553 \ 554 /* Built-in module versions. */ \ 555 __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \ 556 BOUNDED_SECTION_BY(__modver, ___modver) \ 557 } \ 558 \ 559 KCFI_TRAPS \ 560 \ 561 RO_EXCEPTION_TABLE \ 562 NOTES \ 563 BTF \ 564 \ 565 . = ALIGN((align)); \ 566 __end_rodata = .; 567 568 569 /* 570 * Non-instrumentable text section 571 */ 572 #define NOINSTR_TEXT \ 573 ALIGN_FUNCTION(); \ 574 __noinstr_text_start = .; \ 575 *(.noinstr.text) \ 576 __cpuidle_text_start = .; \ 577 *(.cpuidle.text) \ 578 __cpuidle_text_end = .; \ 579 __noinstr_text_end = .; 580 581 /* 582 * .text section. Map to function alignment to avoid address changes 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(); \ 591 *(.text.hot .text.hot.*) \ 592 *(TEXT_MAIN .text.fixup) \ 593 *(.text.unlikely .text.unlikely.*) \ 594 *(.text.unknown .text.unknown.*) \ 595 NOINSTR_TEXT \ 596 *(.ref.text) \ 597 *(.text.asan.* .text.tsan.*) \ 598 MEM_KEEP(init.text*) \ 599 600 601 /* sched.text is aling to function alignment to secure we have same 602 * address even at second ld pass when generating System.map */ 603 #define SCHED_TEXT \ 604 ALIGN_FUNCTION(); \ 605 __sched_text_start = .; \ 606 *(.sched.text) \ 607 __sched_text_end = .; 608 609 /* spinlock.text is aling to function alignment to secure we have same 610 * address even at second ld pass when generating System.map */ 611 #define LOCK_TEXT \ 612 ALIGN_FUNCTION(); \ 613 __lock_text_start = .; \ 614 *(.spinlock.text) \ 615 __lock_text_end = .; 616 617 #define KPROBES_TEXT \ 618 ALIGN_FUNCTION(); \ 619 __kprobes_text_start = .; \ 620 *(.kprobes.text) \ 621 __kprobes_text_end = .; 622 623 #define ENTRY_TEXT \ 624 ALIGN_FUNCTION(); \ 625 __entry_text_start = .; \ 626 *(.entry.text) \ 627 __entry_text_end = .; 628 629 #define IRQENTRY_TEXT \ 630 ALIGN_FUNCTION(); \ 631 __irqentry_text_start = .; \ 632 *(.irqentry.text) \ 633 __irqentry_text_end = .; 634 635 #define SOFTIRQENTRY_TEXT \ 636 ALIGN_FUNCTION(); \ 637 __softirqentry_text_start = .; \ 638 *(.softirqentry.text) \ 639 __softirqentry_text_end = .; 640 641 #define STATIC_CALL_TEXT \ 642 ALIGN_FUNCTION(); \ 643 __static_call_text_start = .; \ 644 *(.static_call.text) \ 645 __static_call_text_end = .; 646 647 /* Section used for early init (in .S files) */ 648 #define HEAD_TEXT KEEP(*(.head.text)) 649 650 #define HEAD_TEXT_SECTION \ 651 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \ 652 HEAD_TEXT \ 653 } 654 655 /* 656 * Exception table 657 */ 658 #define EXCEPTION_TABLE(align) \ 659 . = ALIGN(align); \ 660 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \ 661 BOUNDED_SECTION_BY(__ex_table, ___ex_table) \ 662 } 663 664 /* 665 * .BTF 666 */ 667 #ifdef CONFIG_DEBUG_INFO_BTF 668 #define BTF \ 669 .BTF : AT(ADDR(.BTF) - LOAD_OFFSET) { \ 670 BOUNDED_SECTION_BY(.BTF, _BTF) \ 671 } \ 672 . = ALIGN(4); \ 673 .BTF_ids : AT(ADDR(.BTF_ids) - LOAD_OFFSET) { \ 674 *(.BTF_ids) \ 675 } 676 #else 677 #define BTF 678 #endif 679 680 /* 681 * Init task 682 */ 683 #define INIT_TASK_DATA_SECTION(align) \ 684 . = ALIGN(align); \ 685 .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \ 686 INIT_TASK_DATA(align) \ 687 } 688 689 #ifdef CONFIG_CONSTRUCTORS 690 #define KERNEL_CTORS() . = ALIGN(8); \ 691 __ctors_start = .; \ 692 KEEP(*(SORT(.ctors.*))) \ 693 KEEP(*(.ctors)) \ 694 KEEP(*(SORT(.init_array.*))) \ 695 KEEP(*(.init_array)) \ 696 __ctors_end = .; 697 #else 698 #define KERNEL_CTORS() 699 #endif 700 701 /* init and exit section handling */ 702 #define INIT_DATA \ 703 KEEP(*(SORT(___kentry+*))) \ 704 *(.init.data .init.data.*) \ 705 MEM_DISCARD(init.data*) \ 706 KERNEL_CTORS() \ 707 MCOUNT_REC() \ 708 *(.init.rodata .init.rodata.*) \ 709 FTRACE_EVENTS() \ 710 TRACE_SYSCALLS() \ 711 KPROBE_BLACKLIST() \ 712 ERROR_INJECT_WHITELIST() \ 713 MEM_DISCARD(init.rodata) \ 714 CLK_OF_TABLES() \ 715 RESERVEDMEM_OF_TABLES() \ 716 TIMER_OF_TABLES() \ 717 CPU_METHOD_OF_TABLES() \ 718 CPUIDLE_METHOD_OF_TABLES() \ 719 KERNEL_DTB() \ 720 IRQCHIP_OF_MATCH_TABLE() \ 721 ACPI_PROBE_TABLE(irqchip) \ 722 ACPI_PROBE_TABLE(timer) \ 723 THERMAL_TABLE(governor) \ 724 EARLYCON_TABLE() \ 725 LSM_TABLE() \ 726 EARLY_LSM_TABLE() \ 727 KUNIT_INIT_TABLE() 728 729 #define INIT_TEXT \ 730 *(.init.text .init.text.*) \ 731 *(.text.startup) \ 732 MEM_DISCARD(init.text*) 733 734 #define EXIT_DATA \ 735 *(.exit.data .exit.data.*) \ 736 *(.fini_array .fini_array.*) \ 737 *(.dtors .dtors.*) \ 738 739 #define EXIT_TEXT \ 740 *(.exit.text) \ 741 *(.text.exit) \ 742 743 #define EXIT_CALL \ 744 *(.exitcall.exit) 745 746 /* 747 * bss (Block Started by Symbol) - uninitialized data 748 * zeroed during startup 749 */ 750 #define SBSS(sbss_align) \ 751 . = ALIGN(sbss_align); \ 752 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \ 753 *(.dynsbss) \ 754 *(SBSS_MAIN) \ 755 *(.scommon) \ 756 } 757 758 /* 759 * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra 760 * sections to the front of bss. 761 */ 762 #ifndef BSS_FIRST_SECTIONS 763 #define BSS_FIRST_SECTIONS 764 #endif 765 766 #define BSS(bss_align) \ 767 . = ALIGN(bss_align); \ 768 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \ 769 BSS_FIRST_SECTIONS \ 770 . = ALIGN(PAGE_SIZE); \ 771 *(.bss..page_aligned) \ 772 . = ALIGN(PAGE_SIZE); \ 773 *(.dynbss) \ 774 *(BSS_MAIN) \ 775 *(COMMON) \ 776 } 777 778 /* 779 * DWARF debug sections. 780 * Symbols in the DWARF debugging sections are relative to 781 * the beginning of the section so we begin them at 0. 782 */ 783 #define DWARF_DEBUG \ 784 /* DWARF 1 */ \ 785 .debug 0 : { *(.debug) } \ 786 .line 0 : { *(.line) } \ 787 /* GNU DWARF 1 extensions */ \ 788 .debug_srcinfo 0 : { *(.debug_srcinfo) } \ 789 .debug_sfnames 0 : { *(.debug_sfnames) } \ 790 /* DWARF 1.1 and DWARF 2 */ \ 791 .debug_aranges 0 : { *(.debug_aranges) } \ 792 .debug_pubnames 0 : { *(.debug_pubnames) } \ 793 /* DWARF 2 */ \ 794 .debug_info 0 : { *(.debug_info \ 795 .gnu.linkonce.wi.*) } \ 796 .debug_abbrev 0 : { *(.debug_abbrev) } \ 797 .debug_line 0 : { *(.debug_line) } \ 798 .debug_frame 0 : { *(.debug_frame) } \ 799 .debug_str 0 : { *(.debug_str) } \ 800 .debug_loc 0 : { *(.debug_loc) } \ 801 .debug_macinfo 0 : { *(.debug_macinfo) } \ 802 .debug_pubtypes 0 : { *(.debug_pubtypes) } \ 803 /* DWARF 3 */ \ 804 .debug_ranges 0 : { *(.debug_ranges) } \ 805 /* SGI/MIPS DWARF 2 extensions */ \ 806 .debug_weaknames 0 : { *(.debug_weaknames) } \ 807 .debug_funcnames 0 : { *(.debug_funcnames) } \ 808 .debug_typenames 0 : { *(.debug_typenames) } \ 809 .debug_varnames 0 : { *(.debug_varnames) } \ 810 /* GNU DWARF 2 extensions */ \ 811 .debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) } \ 812 .debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) } \ 813 /* DWARF 4 */ \ 814 .debug_types 0 : { *(.debug_types) } \ 815 /* DWARF 5 */ \ 816 .debug_addr 0 : { *(.debug_addr) } \ 817 .debug_line_str 0 : { *(.debug_line_str) } \ 818 .debug_loclists 0 : { *(.debug_loclists) } \ 819 .debug_macro 0 : { *(.debug_macro) } \ 820 .debug_names 0 : { *(.debug_names) } \ 821 .debug_rnglists 0 : { *(.debug_rnglists) } \ 822 .debug_str_offsets 0 : { *(.debug_str_offsets) } 823 824 /* Stabs debugging sections. */ 825 #define STABS_DEBUG \ 826 .stab 0 : { *(.stab) } \ 827 .stabstr 0 : { *(.stabstr) } \ 828 .stab.excl 0 : { *(.stab.excl) } \ 829 .stab.exclstr 0 : { *(.stab.exclstr) } \ 830 .stab.index 0 : { *(.stab.index) } \ 831 .stab.indexstr 0 : { *(.stab.indexstr) } 832 833 /* Required sections not related to debugging. */ 834 #define ELF_DETAILS \ 835 .comment 0 : { *(.comment) } \ 836 .symtab 0 : { *(.symtab) } \ 837 .strtab 0 : { *(.strtab) } \ 838 .shstrtab 0 : { *(.shstrtab) } 839 840 #ifdef CONFIG_GENERIC_BUG 841 #define BUG_TABLE \ 842 . = ALIGN(8); \ 843 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \ 844 BOUNDED_SECTION_BY(__bug_table, ___bug_table) \ 845 } 846 #else 847 #define BUG_TABLE 848 #endif 849 850 #ifdef CONFIG_UNWINDER_ORC 851 #define ORC_UNWIND_TABLE \ 852 .orc_header : AT(ADDR(.orc_header) - LOAD_OFFSET) { \ 853 BOUNDED_SECTION_BY(.orc_header, _orc_header) \ 854 } \ 855 . = ALIGN(4); \ 856 .orc_unwind_ip : AT(ADDR(.orc_unwind_ip) - LOAD_OFFSET) { \ 857 BOUNDED_SECTION_BY(.orc_unwind_ip, _orc_unwind_ip) \ 858 } \ 859 . = ALIGN(2); \ 860 .orc_unwind : AT(ADDR(.orc_unwind) - LOAD_OFFSET) { \ 861 BOUNDED_SECTION_BY(.orc_unwind, _orc_unwind) \ 862 } \ 863 text_size = _etext - _stext; \ 864 . = ALIGN(4); \ 865 .orc_lookup : AT(ADDR(.orc_lookup) - LOAD_OFFSET) { \ 866 orc_lookup = .; \ 867 . += (((text_size + LOOKUP_BLOCK_SIZE - 1) / \ 868 LOOKUP_BLOCK_SIZE) + 1) * 4; \ 869 orc_lookup_end = .; \ 870 } 871 #else 872 #define ORC_UNWIND_TABLE 873 #endif 874 875 /* Built-in firmware blobs */ 876 #ifdef CONFIG_FW_LOADER 877 #define FW_LOADER_BUILT_IN_DATA \ 878 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) ALIGN(8) { \ 879 BOUNDED_SECTION_PRE_LABEL(.builtin_fw, _builtin_fw, __start, __end) \ 880 } 881 #else 882 #define FW_LOADER_BUILT_IN_DATA 883 #endif 884 885 #ifdef CONFIG_PM_TRACE 886 #define TRACEDATA \ 887 . = ALIGN(4); \ 888 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \ 889 BOUNDED_SECTION_POST_LABEL(.tracedata, __tracedata, _start, _end) \ 890 } 891 #else 892 #define TRACEDATA 893 #endif 894 895 #ifdef CONFIG_PRINTK_INDEX 896 #define PRINTK_INDEX \ 897 .printk_index : AT(ADDR(.printk_index) - LOAD_OFFSET) { \ 898 BOUNDED_SECTION_BY(.printk_index, _printk_index) \ 899 } 900 #else 901 #define PRINTK_INDEX 902 #endif 903 904 /* 905 * Discard .note.GNU-stack, which is emitted as PROGBITS by the compiler. 906 * Otherwise, the type of .notes section would become PROGBITS instead of NOTES. 907 * 908 * Also, discard .note.gnu.property, otherwise it forces the notes section to 909 * be 8-byte aligned which causes alignment mismatches with the kernel's custom 910 * 4-byte aligned notes. 911 */ 912 #define NOTES \ 913 /DISCARD/ : { \ 914 *(.note.GNU-stack) \ 915 *(.note.gnu.property) \ 916 } \ 917 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \ 918 BOUNDED_SECTION_BY(.note.*, _notes) \ 919 } NOTES_HEADERS \ 920 NOTES_HEADERS_RESTORE 921 922 #define INIT_SETUP(initsetup_align) \ 923 . = ALIGN(initsetup_align); \ 924 BOUNDED_SECTION_POST_LABEL(.init.setup, __setup, _start, _end) 925 926 #define INIT_CALLS_LEVEL(level) \ 927 __initcall##level##_start = .; \ 928 KEEP(*(.initcall##level##.init)) \ 929 KEEP(*(.initcall##level##s.init)) \ 930 931 #define INIT_CALLS \ 932 __initcall_start = .; \ 933 KEEP(*(.initcallearly.init)) \ 934 INIT_CALLS_LEVEL(0) \ 935 INIT_CALLS_LEVEL(1) \ 936 INIT_CALLS_LEVEL(2) \ 937 INIT_CALLS_LEVEL(3) \ 938 INIT_CALLS_LEVEL(4) \ 939 INIT_CALLS_LEVEL(5) \ 940 INIT_CALLS_LEVEL(rootfs) \ 941 INIT_CALLS_LEVEL(6) \ 942 INIT_CALLS_LEVEL(7) \ 943 __initcall_end = .; 944 945 #define CON_INITCALL \ 946 BOUNDED_SECTION_POST_LABEL(.con_initcall.init, __con_initcall, _start, _end) 947 948 /* Alignment must be consistent with (kunit_suite *) in include/kunit/test.h */ 949 #define KUNIT_TABLE() \ 950 . = ALIGN(8); \ 951 BOUNDED_SECTION_POST_LABEL(.kunit_test_suites, __kunit_suites, _start, _end) 952 953 /* Alignment must be consistent with (kunit_suite *) in include/kunit/test.h */ 954 #define KUNIT_INIT_TABLE() \ 955 . = ALIGN(8); \ 956 BOUNDED_SECTION_POST_LABEL(.kunit_init_test_suites, \ 957 __kunit_init_suites, _start, _end) 958 959 #ifdef CONFIG_BLK_DEV_INITRD 960 #define INIT_RAM_FS \ 961 . = ALIGN(4); \ 962 __initramfs_start = .; \ 963 KEEP(*(.init.ramfs)) \ 964 . = ALIGN(8); \ 965 KEEP(*(.init.ramfs.info)) 966 #else 967 #define INIT_RAM_FS 968 #endif 969 970 /* 971 * Memory encryption operates on a page basis. Since we need to clear 972 * the memory encryption mask for this section, it needs to be aligned 973 * on a page boundary and be a page-size multiple in length. 974 * 975 * Note: We use a separate section so that only this section gets 976 * decrypted to avoid exposing more than we wish. 977 */ 978 #ifdef CONFIG_AMD_MEM_ENCRYPT 979 #define PERCPU_DECRYPTED_SECTION \ 980 . = ALIGN(PAGE_SIZE); \ 981 *(.data..percpu..decrypted) \ 982 . = ALIGN(PAGE_SIZE); 983 #else 984 #define PERCPU_DECRYPTED_SECTION 985 #endif 986 987 988 /* 989 * Default discarded sections. 990 * 991 * Some archs want to discard exit text/data at runtime rather than 992 * link time due to cross-section references such as alt instructions, 993 * bug table, eh_frame, etc. DISCARDS must be the last of output 994 * section definitions so that such archs put those in earlier section 995 * definitions. 996 */ 997 #ifdef RUNTIME_DISCARD_EXIT 998 #define EXIT_DISCARDS 999 #else 1000 #define EXIT_DISCARDS \ 1001 EXIT_TEXT \ 1002 EXIT_DATA 1003 #endif 1004 1005 /* 1006 * Clang's -fprofile-arcs, -fsanitize=kernel-address, and 1007 * -fsanitize=thread produce unwanted sections (.eh_frame 1008 * and .init_array.*), but CONFIG_CONSTRUCTORS wants to 1009 * keep any .init_array.* sections. 1010 * https://llvm.org/pr46478 1011 */ 1012 #ifdef CONFIG_UNWIND_TABLES 1013 #define DISCARD_EH_FRAME 1014 #else 1015 #define DISCARD_EH_FRAME *(.eh_frame) 1016 #endif 1017 #if defined(CONFIG_GCOV_KERNEL) || defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KCSAN) 1018 # ifdef CONFIG_CONSTRUCTORS 1019 # define SANITIZER_DISCARDS \ 1020 DISCARD_EH_FRAME 1021 # else 1022 # define SANITIZER_DISCARDS \ 1023 *(.init_array) *(.init_array.*) \ 1024 DISCARD_EH_FRAME 1025 # endif 1026 #else 1027 # define SANITIZER_DISCARDS 1028 #endif 1029 1030 #define COMMON_DISCARDS \ 1031 SANITIZER_DISCARDS \ 1032 PATCHABLE_DISCARDS \ 1033 *(.discard) \ 1034 *(.discard.*) \ 1035 *(.export_symbol) \ 1036 *(.modinfo) \ 1037 /* ld.bfd warns about .gnu.version* even when not emitted */ \ 1038 *(.gnu.version*) \ 1039 1040 #define DISCARDS \ 1041 /DISCARD/ : { \ 1042 EXIT_DISCARDS \ 1043 EXIT_CALL \ 1044 COMMON_DISCARDS \ 1045 } 1046 1047 /** 1048 * PERCPU_INPUT - the percpu input sections 1049 * @cacheline: cacheline size 1050 * 1051 * The core percpu section names and core symbols which do not rely 1052 * directly upon load addresses. 1053 * 1054 * @cacheline is used to align subsections to avoid false cacheline 1055 * sharing between subsections for different purposes. 1056 */ 1057 #define PERCPU_INPUT(cacheline) \ 1058 __per_cpu_start = .; \ 1059 *(.data..percpu..first) \ 1060 . = ALIGN(PAGE_SIZE); \ 1061 *(.data..percpu..page_aligned) \ 1062 . = ALIGN(cacheline); \ 1063 *(.data..percpu..read_mostly) \ 1064 . = ALIGN(cacheline); \ 1065 *(.data..percpu) \ 1066 *(.data..percpu..shared_aligned) \ 1067 PERCPU_DECRYPTED_SECTION \ 1068 __per_cpu_end = .; 1069 1070 /** 1071 * PERCPU_VADDR - define output section for percpu area 1072 * @cacheline: cacheline size 1073 * @vaddr: explicit base address (optional) 1074 * @phdr: destination PHDR (optional) 1075 * 1076 * Macro which expands to output section for percpu area. 1077 * 1078 * @cacheline is used to align subsections to avoid false cacheline 1079 * sharing between subsections for different purposes. 1080 * 1081 * If @vaddr is not blank, it specifies explicit base address and all 1082 * percpu symbols will be offset from the given address. If blank, 1083 * @vaddr always equals @laddr + LOAD_OFFSET. 1084 * 1085 * @phdr defines the output PHDR to use if not blank. Be warned that 1086 * output PHDR is sticky. If @phdr is specified, the next output 1087 * section in the linker script will go there too. @phdr should have 1088 * a leading colon. 1089 * 1090 * Note that this macros defines __per_cpu_load as an absolute symbol. 1091 * If there is no need to put the percpu section at a predetermined 1092 * address, use PERCPU_SECTION. 1093 */ 1094 #define PERCPU_VADDR(cacheline, vaddr, phdr) \ 1095 __per_cpu_load = .; \ 1096 .data..percpu vaddr : AT(__per_cpu_load - LOAD_OFFSET) { \ 1097 PERCPU_INPUT(cacheline) \ 1098 } phdr \ 1099 . = __per_cpu_load + SIZEOF(.data..percpu); 1100 1101 /** 1102 * PERCPU_SECTION - define output section for percpu area, simple version 1103 * @cacheline: cacheline size 1104 * 1105 * Align to PAGE_SIZE and outputs output section for percpu area. This 1106 * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and 1107 * __per_cpu_start will be identical. 1108 * 1109 * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,) 1110 * except that __per_cpu_load is defined as a relative symbol against 1111 * .data..percpu which is required for relocatable x86_32 configuration. 1112 */ 1113 #define PERCPU_SECTION(cacheline) \ 1114 . = ALIGN(PAGE_SIZE); \ 1115 .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \ 1116 __per_cpu_load = .; \ 1117 PERCPU_INPUT(cacheline) \ 1118 } 1119 1120 1121 /* 1122 * Definition of the high level *_SECTION macros 1123 * They will fit only a subset of the architectures 1124 */ 1125 1126 1127 /* 1128 * Writeable data. 1129 * All sections are combined in a single .data section. 1130 * The sections following CONSTRUCTORS are arranged so their 1131 * typical alignment matches. 1132 * A cacheline is typical/always less than a PAGE_SIZE so 1133 * the sections that has this restriction (or similar) 1134 * is located before the ones requiring PAGE_SIZE alignment. 1135 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which 1136 * matches the requirement of PAGE_ALIGNED_DATA. 1137 * 1138 * use 0 as page_align if page_aligned data is not used */ 1139 #define RW_DATA(cacheline, pagealigned, inittask) \ 1140 . = ALIGN(PAGE_SIZE); \ 1141 .data : AT(ADDR(.data) - LOAD_OFFSET) { \ 1142 INIT_TASK_DATA(inittask) \ 1143 NOSAVE_DATA \ 1144 PAGE_ALIGNED_DATA(pagealigned) \ 1145 CACHELINE_ALIGNED_DATA(cacheline) \ 1146 READ_MOSTLY_DATA(cacheline) \ 1147 DATA_DATA \ 1148 CONSTRUCTORS \ 1149 } \ 1150 BUG_TABLE \ 1151 1152 #define INIT_TEXT_SECTION(inittext_align) \ 1153 . = ALIGN(inittext_align); \ 1154 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \ 1155 _sinittext = .; \ 1156 INIT_TEXT \ 1157 _einittext = .; \ 1158 } 1159 1160 #define INIT_DATA_SECTION(initsetup_align) \ 1161 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \ 1162 INIT_DATA \ 1163 INIT_SETUP(initsetup_align) \ 1164 INIT_CALLS \ 1165 CON_INITCALL \ 1166 INIT_RAM_FS \ 1167 } 1168 1169 #define BSS_SECTION(sbss_align, bss_align, stop_align) \ 1170 . = ALIGN(sbss_align); \ 1171 __bss_start = .; \ 1172 SBSS(sbss_align) \ 1173 BSS(bss_align) \ 1174 . = ALIGN(stop_align); \ 1175 __bss_stop = .; 1176