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(...) 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 #ifndef LOAD_OFFSET 54 #define LOAD_OFFSET 0 55 #endif 56 57 /* 58 * Only some architectures want to have the .notes segment visible in 59 * a separate PT_NOTE ELF Program Header. When this happens, it needs 60 * to be visible in both the kernel text's PT_LOAD and the PT_NOTE 61 * Program Headers. In this case, though, the PT_LOAD needs to be made 62 * the default again so that all the following sections don't also end 63 * up in the PT_NOTE Program Header. 64 */ 65 #ifdef EMITS_PT_NOTE 66 #define NOTES_HEADERS :text :note 67 #define NOTES_HEADERS_RESTORE __restore_ph : { *(.__restore_ph) } :text 68 #else 69 #define NOTES_HEADERS 70 #define NOTES_HEADERS_RESTORE 71 #endif 72 73 /* 74 * Some architectures have non-executable read-only exception tables. 75 * They can be added to the RO_DATA segment by specifying their desired 76 * alignment. 77 */ 78 #ifdef RO_EXCEPTION_TABLE_ALIGN 79 #define RO_EXCEPTION_TABLE EXCEPTION_TABLE(RO_EXCEPTION_TABLE_ALIGN) 80 #else 81 #define RO_EXCEPTION_TABLE 82 #endif 83 84 /* Align . function alignment. */ 85 #define ALIGN_FUNCTION() . = ALIGN(CONFIG_FUNCTION_ALIGNMENT) 86 87 /* 88 * LD_DEAD_CODE_DATA_ELIMINATION option enables -fdata-sections, which 89 * generates .data.identifier sections, which need to be pulled in with 90 * .data. We don't want to pull in .data..other sections, which Linux 91 * has defined. Same for text and bss. 92 * 93 * With LTO_CLANG, the linker also splits sections by default, so we need 94 * these macros to combine the sections during the final link. 95 * 96 * RODATA_MAIN is not used because existing code already defines .rodata.x 97 * sections to be brought in with rodata. 98 */ 99 #if defined(CONFIG_LD_DEAD_CODE_DATA_ELIMINATION) || defined(CONFIG_LTO_CLANG) 100 #define TEXT_MAIN .text .text.[0-9a-zA-Z_]* 101 #define DATA_MAIN .data .data.[0-9a-zA-Z_]* .data..L* .data..compoundliteral* .data.$__unnamed_* .data.$L* 102 #define SDATA_MAIN .sdata .sdata.[0-9a-zA-Z_]* 103 #define RODATA_MAIN .rodata .rodata.[0-9a-zA-Z_]* .rodata..L* 104 #define BSS_MAIN .bss .bss.[0-9a-zA-Z_]* .bss..compoundliteral* 105 #define SBSS_MAIN .sbss .sbss.[0-9a-zA-Z_]* 106 #else 107 #define TEXT_MAIN .text 108 #define DATA_MAIN .data 109 #define SDATA_MAIN .sdata 110 #define RODATA_MAIN .rodata 111 #define BSS_MAIN .bss 112 #define SBSS_MAIN .sbss 113 #endif 114 115 /* 116 * GCC 4.5 and later have a 32 bytes section alignment for structures. 117 * Except GCC 4.9, that feels the need to align on 64 bytes. 118 */ 119 #define STRUCT_ALIGNMENT 32 120 #define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT) 121 122 /* 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. 126 */ 127 #define SCHED_DATA \ 128 STRUCT_ALIGN(); \ 129 __sched_class_highest = .; \ 130 *(__stop_sched_class) \ 131 *(__dl_sched_class) \ 132 *(__rt_sched_class) \ 133 *(__fair_sched_class) \ 134 *(__idle_sched_class) \ 135 __sched_class_lowest = .; 136 137 /* 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) 140 */ 141 142 #if defined(CONFIG_MEMORY_HOTPLUG) 143 #define MEM_KEEP(sec) *(.mem##sec) 144 #define MEM_DISCARD(sec) 145 #else 146 #define MEM_KEEP(sec) 147 #define MEM_DISCARD(sec) *(.mem##sec) 148 #endif 149 150 #ifndef CONFIG_HAVE_DYNAMIC_FTRACE_NO_PATCHABLE 151 #define KEEP_PATCHABLE KEEP(*(__patchable_function_entries)) 152 #define PATCHABLE_DISCARDS 153 #else 154 #define KEEP_PATCHABLE 155 #define PATCHABLE_DISCARDS *(__patchable_function_entries) 156 #endif 157 158 #ifndef CONFIG_ARCH_SUPPORTS_CFI_CLANG 159 /* 160 * Simply points to ftrace_stub, but with the proper protocol. 161 * Defined by the linker script in linux/vmlinux.lds.h 162 */ 163 #define FTRACE_STUB_HACK ftrace_stub_graph = ftrace_stub; 164 #else 165 #define FTRACE_STUB_HACK 166 #endif 167 168 #ifdef CONFIG_FTRACE_MCOUNT_RECORD 169 /* 170 * The ftrace call sites are logged to a section whose name depends on the 171 * compiler option used. A given kernel image will only use one, AKA 172 * FTRACE_CALLSITE_SECTION. We capture all of them here to avoid header 173 * dependencies for FTRACE_CALLSITE_SECTION's definition. 174 * 175 * ftrace_ops_list_func will be defined as arch_ftrace_ops_list_func 176 * as some archs will have a different prototype for that function 177 * but ftrace_ops_list_func() will have a single prototype. 178 */ 179 #define MCOUNT_REC() . = ALIGN(8); \ 180 __start_mcount_loc = .; \ 181 KEEP(*(__mcount_loc)) \ 182 KEEP_PATCHABLE \ 183 __stop_mcount_loc = .; \ 184 FTRACE_STUB_HACK \ 185 ftrace_ops_list_func = arch_ftrace_ops_list_func; 186 #else 187 # ifdef CONFIG_FUNCTION_TRACER 188 # define MCOUNT_REC() FTRACE_STUB_HACK \ 189 ftrace_ops_list_func = arch_ftrace_ops_list_func; 190 # else 191 # define MCOUNT_REC() 192 # endif 193 #endif 194 195 #define BOUNDED_SECTION_PRE_LABEL(_sec_, _label_, _BEGIN_, _END_) \ 196 _BEGIN_##_label_ = .; \ 197 KEEP(*(_sec_)) \ 198 _END_##_label_ = .; 199 200 #define BOUNDED_SECTION_POST_LABEL(_sec_, _label_, _BEGIN_, _END_) \ 201 _label_##_BEGIN_ = .; \ 202 KEEP(*(_sec_)) \ 203 _label_##_END_ = .; 204 205 #define BOUNDED_SECTION_BY(_sec_, _label_) \ 206 BOUNDED_SECTION_PRE_LABEL(_sec_, _label_, __start, __stop) 207 208 #define BOUNDED_SECTION(_sec) BOUNDED_SECTION_BY(_sec, _sec) 209 210 #define HEADERED_SECTION_PRE_LABEL(_sec_, _label_, _BEGIN_, _END_, _HDR_) \ 211 _HDR_##_label_ = .; \ 212 KEEP(*(.gnu.linkonce.##_sec_)) \ 213 BOUNDED_SECTION_PRE_LABEL(_sec_, _label_, _BEGIN_, _END_) 214 215 #define HEADERED_SECTION_POST_LABEL(_sec_, _label_, _BEGIN_, _END_, _HDR_) \ 216 _label_##_HDR_ = .; \ 217 KEEP(*(.gnu.linkonce.##_sec_)) \ 218 BOUNDED_SECTION_POST_LABEL(_sec_, _label_, _BEGIN_, _END_) 219 220 #define HEADERED_SECTION_BY(_sec_, _label_) \ 221 HEADERED_SECTION_PRE_LABEL(_sec_, _label_, __start, __stop) 222 223 #define HEADERED_SECTION(_sec) HEADERED_SECTION_BY(_sec, _sec) 224 225 #ifdef CONFIG_TRACE_BRANCH_PROFILING 226 #define LIKELY_PROFILE() \ 227 BOUNDED_SECTION_BY(_ftrace_annotated_branch, _annotated_branch_profile) 228 #else 229 #define LIKELY_PROFILE() 230 #endif 231 232 #ifdef CONFIG_PROFILE_ALL_BRANCHES 233 #define BRANCH_PROFILE() \ 234 BOUNDED_SECTION_BY(_ftrace_branch, _branch_profile) 235 #else 236 #define BRANCH_PROFILE() 237 #endif 238 239 #ifdef CONFIG_KPROBES 240 #define KPROBE_BLACKLIST() \ 241 . = ALIGN(8); \ 242 BOUNDED_SECTION(_kprobe_blacklist) 243 #else 244 #define KPROBE_BLACKLIST() 245 #endif 246 247 #ifdef CONFIG_FUNCTION_ERROR_INJECTION 248 #define ERROR_INJECT_WHITELIST() \ 249 STRUCT_ALIGN(); \ 250 BOUNDED_SECTION(_error_injection_whitelist) 251 #else 252 #define ERROR_INJECT_WHITELIST() 253 #endif 254 255 #ifdef CONFIG_EVENT_TRACING 256 #define FTRACE_EVENTS() \ 257 . = ALIGN(8); \ 258 BOUNDED_SECTION(_ftrace_events) \ 259 BOUNDED_SECTION_BY(_ftrace_eval_map, _ftrace_eval_maps) 260 #else 261 #define FTRACE_EVENTS() 262 #endif 263 264 #ifdef CONFIG_TRACING 265 #define TRACE_PRINTKS() BOUNDED_SECTION_BY(__trace_printk_fmt, ___trace_bprintk_fmt) 266 #define TRACEPOINT_STR() BOUNDED_SECTION_BY(__tracepoint_str, ___tracepoint_str) 267 #else 268 #define TRACE_PRINTKS() 269 #define TRACEPOINT_STR() 270 #endif 271 272 #ifdef CONFIG_FTRACE_SYSCALLS 273 #define TRACE_SYSCALLS() \ 274 . = ALIGN(8); \ 275 BOUNDED_SECTION_BY(__syscalls_metadata, _syscalls_metadata) 276 #else 277 #define TRACE_SYSCALLS() 278 #endif 279 280 #ifdef CONFIG_BPF_EVENTS 281 #define BPF_RAW_TP() STRUCT_ALIGN(); \ 282 BOUNDED_SECTION_BY(__bpf_raw_tp_map, __bpf_raw_tp) 283 #else 284 #define BPF_RAW_TP() 285 #endif 286 287 #ifdef CONFIG_SERIAL_EARLYCON 288 #define EARLYCON_TABLE() \ 289 . = ALIGN(8); \ 290 BOUNDED_SECTION_POST_LABEL(__earlycon_table, __earlycon_table, , _end) 291 #else 292 #define EARLYCON_TABLE() 293 #endif 294 295 #ifdef CONFIG_SECURITY 296 #define LSM_TABLE() \ 297 . = ALIGN(8); \ 298 BOUNDED_SECTION_PRE_LABEL(.lsm_info.init, _lsm_info, __start, __end) 299 300 #define EARLY_LSM_TABLE() \ 301 . = ALIGN(8); \ 302 BOUNDED_SECTION_PRE_LABEL(.early_lsm_info.init, _early_lsm_info, __start, __end) 303 #else 304 #define LSM_TABLE() 305 #define EARLY_LSM_TABLE() 306 #endif 307 308 #define ___OF_TABLE(cfg, name) _OF_TABLE_##cfg(name) 309 #define __OF_TABLE(cfg, name) ___OF_TABLE(cfg, name) 310 #define OF_TABLE(cfg, name) __OF_TABLE(IS_ENABLED(cfg), name) 311 #define _OF_TABLE_0(name) 312 #define _OF_TABLE_1(name) \ 313 . = ALIGN(8); \ 314 __##name##_of_table = .; \ 315 KEEP(*(__##name##_of_table)) \ 316 KEEP(*(__##name##_of_table_end)) 317 318 #define TIMER_OF_TABLES() OF_TABLE(CONFIG_TIMER_OF, timer) 319 #define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip) 320 #define CLK_OF_TABLES() OF_TABLE(CONFIG_COMMON_CLK, clk) 321 #define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem) 322 #define CPU_METHOD_OF_TABLES() OF_TABLE(CONFIG_SMP, cpu_method) 323 #define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method) 324 325 #ifdef CONFIG_ACPI 326 #define ACPI_PROBE_TABLE(name) \ 327 . = ALIGN(8); \ 328 BOUNDED_SECTION_POST_LABEL(__##name##_acpi_probe_table, \ 329 __##name##_acpi_probe_table,, _end) 330 #else 331 #define ACPI_PROBE_TABLE(name) 332 #endif 333 334 #ifdef CONFIG_THERMAL 335 #define THERMAL_TABLE(name) \ 336 . = ALIGN(8); \ 337 BOUNDED_SECTION_POST_LABEL(__##name##_thermal_table, \ 338 __##name##_thermal_table,, _end) 339 #else 340 #define THERMAL_TABLE(name) 341 #endif 342 343 #define KERNEL_DTB() \ 344 STRUCT_ALIGN(); \ 345 __dtb_start = .; \ 346 KEEP(*(.dtb.init.rodata)) \ 347 __dtb_end = .; 348 349 /* 350 * .data section 351 */ 352 #define DATA_DATA \ 353 *(.xiptext) \ 354 *(DATA_MAIN) \ 355 *(.data..decrypted) \ 356 *(.ref.data) \ 357 *(.data..shared_aligned) /* percpu related */ \ 358 MEM_KEEP(init.data*) \ 359 *(.data.unlikely) \ 360 __start_once = .; \ 361 *(.data.once) \ 362 __end_once = .; \ 363 STRUCT_ALIGN(); \ 364 *(__tracepoints) \ 365 /* implement dynamic printk debug */ \ 366 . = ALIGN(8); \ 367 BOUNDED_SECTION_BY(__dyndbg_classes, ___dyndbg_classes) \ 368 BOUNDED_SECTION_BY(__dyndbg, ___dyndbg) \ 369 LIKELY_PROFILE() \ 370 BRANCH_PROFILE() \ 371 TRACE_PRINTKS() \ 372 BPF_RAW_TP() \ 373 TRACEPOINT_STR() \ 374 KUNIT_TABLE() 375 376 /* 377 * Data section helpers 378 */ 379 #define NOSAVE_DATA \ 380 . = ALIGN(PAGE_SIZE); \ 381 __nosave_begin = .; \ 382 *(.data..nosave) \ 383 . = ALIGN(PAGE_SIZE); \ 384 __nosave_end = .; 385 386 #define PAGE_ALIGNED_DATA(page_align) \ 387 . = ALIGN(page_align); \ 388 *(.data..page_aligned) \ 389 . = ALIGN(page_align); 390 391 #define READ_MOSTLY_DATA(align) \ 392 . = ALIGN(align); \ 393 *(.data..read_mostly) \ 394 . = ALIGN(align); 395 396 #define CACHELINE_ALIGNED_DATA(align) \ 397 . = ALIGN(align); \ 398 *(.data..cacheline_aligned) 399 400 #define INIT_TASK_DATA(align) \ 401 . = ALIGN(align); \ 402 __start_init_task = .; \ 403 init_thread_union = .; \ 404 init_stack = .; \ 405 KEEP(*(.data..init_task)) \ 406 KEEP(*(.data..init_thread_info)) \ 407 . = __start_init_task + THREAD_SIZE; \ 408 __end_init_task = .; 409 410 #define JUMP_TABLE_DATA \ 411 . = ALIGN(8); \ 412 BOUNDED_SECTION_BY(__jump_table, ___jump_table) 413 414 #ifdef CONFIG_HAVE_STATIC_CALL_INLINE 415 #define STATIC_CALL_DATA \ 416 . = ALIGN(8); \ 417 BOUNDED_SECTION_BY(.static_call_sites, _static_call_sites) \ 418 BOUNDED_SECTION_BY(.static_call_tramp_key, _static_call_tramp_key) 419 #else 420 #define STATIC_CALL_DATA 421 #endif 422 423 /* 424 * Allow architectures to handle ro_after_init data on their 425 * own by defining an empty RO_AFTER_INIT_DATA. 426 */ 427 #ifndef RO_AFTER_INIT_DATA 428 #define RO_AFTER_INIT_DATA \ 429 . = ALIGN(8); \ 430 __start_ro_after_init = .; \ 431 *(.data..ro_after_init) \ 432 JUMP_TABLE_DATA \ 433 STATIC_CALL_DATA \ 434 __end_ro_after_init = .; 435 #endif 436 437 /* 438 * .kcfi_traps contains a list KCFI trap locations. 439 */ 440 #ifndef KCFI_TRAPS 441 #ifdef CONFIG_ARCH_USES_CFI_TRAPS 442 #define KCFI_TRAPS \ 443 __kcfi_traps : AT(ADDR(__kcfi_traps) - LOAD_OFFSET) { \ 444 BOUNDED_SECTION_BY(.kcfi_traps, ___kcfi_traps) \ 445 } 446 #else 447 #define KCFI_TRAPS 448 #endif 449 #endif 450 451 /* 452 * Some symbol definitions will not exist yet during the first pass of the 453 * link, but are guaranteed to exist in the final link. Provide preliminary 454 * definitions that will be superseded in the final link to avoid having to 455 * rely on weak external linkage, which requires a GOT when used in position 456 * independent code. 457 */ 458 #define PRELIMINARY_SYMBOL_DEFINITIONS \ 459 PROVIDE(kallsyms_addresses = .); \ 460 PROVIDE(kallsyms_offsets = .); \ 461 PROVIDE(kallsyms_names = .); \ 462 PROVIDE(kallsyms_num_syms = .); \ 463 PROVIDE(kallsyms_relative_base = .); \ 464 PROVIDE(kallsyms_token_table = .); \ 465 PROVIDE(kallsyms_token_index = .); \ 466 PROVIDE(kallsyms_markers = .); \ 467 PROVIDE(kallsyms_seqs_of_names = .); 468 469 /* 470 * Read only Data 471 */ 472 #define RO_DATA(align) \ 473 . = ALIGN((align)); \ 474 PRELIMINARY_SYMBOL_DEFINITIONS \ 475 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \ 476 __start_rodata = .; \ 477 *(.rodata) *(.rodata.*) \ 478 SCHED_DATA \ 479 RO_AFTER_INIT_DATA /* Read only after init */ \ 480 . = ALIGN(8); \ 481 BOUNDED_SECTION_BY(__tracepoints_ptrs, ___tracepoints_ptrs) \ 482 *(__tracepoints_strings)/* Tracepoints: strings */ \ 483 } \ 484 \ 485 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \ 486 *(.rodata1) \ 487 } \ 488 \ 489 /* PCI quirks */ \ 490 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \ 491 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_early, _pci_fixups_early, __start, __end) \ 492 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_header, _pci_fixups_header, __start, __end) \ 493 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_final, _pci_fixups_final, __start, __end) \ 494 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_enable, _pci_fixups_enable, __start, __end) \ 495 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_resume, _pci_fixups_resume, __start, __end) \ 496 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_suspend, _pci_fixups_suspend, __start, __end) \ 497 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_resume_early, _pci_fixups_resume_early, __start, __end) \ 498 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_suspend_late, _pci_fixups_suspend_late, __start, __end) \ 499 } \ 500 \ 501 FW_LOADER_BUILT_IN_DATA \ 502 TRACEDATA \ 503 \ 504 PRINTK_INDEX \ 505 \ 506 /* Kernel symbol table: Normal symbols */ \ 507 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \ 508 __start___ksymtab = .; \ 509 KEEP(*(SORT(___ksymtab+*))) \ 510 __stop___ksymtab = .; \ 511 } \ 512 \ 513 /* Kernel symbol table: GPL-only symbols */ \ 514 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \ 515 __start___ksymtab_gpl = .; \ 516 KEEP(*(SORT(___ksymtab_gpl+*))) \ 517 __stop___ksymtab_gpl = .; \ 518 } \ 519 \ 520 /* Kernel symbol table: Normal symbols */ \ 521 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \ 522 __start___kcrctab = .; \ 523 KEEP(*(SORT(___kcrctab+*))) \ 524 __stop___kcrctab = .; \ 525 } \ 526 \ 527 /* Kernel symbol table: GPL-only symbols */ \ 528 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \ 529 __start___kcrctab_gpl = .; \ 530 KEEP(*(SORT(___kcrctab_gpl+*))) \ 531 __stop___kcrctab_gpl = .; \ 532 } \ 533 \ 534 /* Kernel symbol table: strings */ \ 535 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \ 536 *(__ksymtab_strings) \ 537 } \ 538 \ 539 /* __*init sections */ \ 540 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \ 541 *(.ref.rodata) \ 542 MEM_KEEP(init.rodata) \ 543 } \ 544 \ 545 /* Built-in module parameters. */ \ 546 __param : AT(ADDR(__param) - LOAD_OFFSET) { \ 547 BOUNDED_SECTION_BY(__param, ___param) \ 548 } \ 549 \ 550 /* Built-in module versions. */ \ 551 __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \ 552 BOUNDED_SECTION_BY(__modver, ___modver) \ 553 } \ 554 \ 555 KCFI_TRAPS \ 556 \ 557 RO_EXCEPTION_TABLE \ 558 NOTES \ 559 BTF \ 560 \ 561 . = ALIGN((align)); \ 562 __end_rodata = .; 563 564 565 /* 566 * Non-instrumentable text section 567 */ 568 #define NOINSTR_TEXT \ 569 ALIGN_FUNCTION(); \ 570 __noinstr_text_start = .; \ 571 *(.noinstr.text) \ 572 __cpuidle_text_start = .; \ 573 *(.cpuidle.text) \ 574 __cpuidle_text_end = .; \ 575 __noinstr_text_end = .; 576 577 /* 578 * .text section. Map to function alignment to avoid address changes 579 * during second ld run in second ld pass when generating System.map 580 * 581 * TEXT_MAIN here will match .text.fixup and .text.unlikely if dead 582 * code elimination is enabled, so these sections should be converted 583 * to use ".." first. 584 */ 585 #define TEXT_TEXT \ 586 ALIGN_FUNCTION(); \ 587 *(.text.hot .text.hot.*) \ 588 *(TEXT_MAIN .text.fixup) \ 589 *(.text.unlikely .text.unlikely.*) \ 590 *(.text.unknown .text.unknown.*) \ 591 NOINSTR_TEXT \ 592 *(.ref.text) \ 593 *(.text.asan.* .text.tsan.*) \ 594 MEM_KEEP(init.text*) \ 595 596 597 /* sched.text is aling to function alignment to secure we have same 598 * address even at second ld pass when generating System.map */ 599 #define SCHED_TEXT \ 600 ALIGN_FUNCTION(); \ 601 __sched_text_start = .; \ 602 *(.sched.text) \ 603 __sched_text_end = .; 604 605 /* spinlock.text is aling to function alignment to secure we have same 606 * address even at second ld pass when generating System.map */ 607 #define LOCK_TEXT \ 608 ALIGN_FUNCTION(); \ 609 __lock_text_start = .; \ 610 *(.spinlock.text) \ 611 __lock_text_end = .; 612 613 #define KPROBES_TEXT \ 614 ALIGN_FUNCTION(); \ 615 __kprobes_text_start = .; \ 616 *(.kprobes.text) \ 617 __kprobes_text_end = .; 618 619 #define ENTRY_TEXT \ 620 ALIGN_FUNCTION(); \ 621 __entry_text_start = .; \ 622 *(.entry.text) \ 623 __entry_text_end = .; 624 625 #define IRQENTRY_TEXT \ 626 ALIGN_FUNCTION(); \ 627 __irqentry_text_start = .; \ 628 *(.irqentry.text) \ 629 __irqentry_text_end = .; 630 631 #define SOFTIRQENTRY_TEXT \ 632 ALIGN_FUNCTION(); \ 633 __softirqentry_text_start = .; \ 634 *(.softirqentry.text) \ 635 __softirqentry_text_end = .; 636 637 #define STATIC_CALL_TEXT \ 638 ALIGN_FUNCTION(); \ 639 __static_call_text_start = .; \ 640 *(.static_call.text) \ 641 __static_call_text_end = .; 642 643 /* Section used for early init (in .S files) */ 644 #define HEAD_TEXT KEEP(*(.head.text)) 645 646 #define HEAD_TEXT_SECTION \ 647 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \ 648 HEAD_TEXT \ 649 } 650 651 /* 652 * Exception table 653 */ 654 #define EXCEPTION_TABLE(align) \ 655 . = ALIGN(align); \ 656 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \ 657 BOUNDED_SECTION_BY(__ex_table, ___ex_table) \ 658 } 659 660 /* 661 * .BTF 662 */ 663 #ifdef CONFIG_DEBUG_INFO_BTF 664 #define BTF \ 665 .BTF : AT(ADDR(.BTF) - LOAD_OFFSET) { \ 666 BOUNDED_SECTION_BY(.BTF, _BTF) \ 667 } \ 668 . = ALIGN(4); \ 669 .BTF_ids : AT(ADDR(.BTF_ids) - LOAD_OFFSET) { \ 670 *(.BTF_ids) \ 671 } 672 #else 673 #define BTF 674 #endif 675 676 /* 677 * Init task 678 */ 679 #define INIT_TASK_DATA_SECTION(align) \ 680 . = ALIGN(align); \ 681 .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \ 682 INIT_TASK_DATA(align) \ 683 } 684 685 #ifdef CONFIG_CONSTRUCTORS 686 #define KERNEL_CTORS() . = ALIGN(8); \ 687 __ctors_start = .; \ 688 KEEP(*(SORT(.ctors.*))) \ 689 KEEP(*(.ctors)) \ 690 KEEP(*(SORT(.init_array.*))) \ 691 KEEP(*(.init_array)) \ 692 __ctors_end = .; 693 #else 694 #define KERNEL_CTORS() 695 #endif 696 697 /* init and exit section handling */ 698 #define INIT_DATA \ 699 KEEP(*(SORT(___kentry+*))) \ 700 *(.init.data .init.data.*) \ 701 MEM_DISCARD(init.data*) \ 702 KERNEL_CTORS() \ 703 MCOUNT_REC() \ 704 *(.init.rodata .init.rodata.*) \ 705 FTRACE_EVENTS() \ 706 TRACE_SYSCALLS() \ 707 KPROBE_BLACKLIST() \ 708 ERROR_INJECT_WHITELIST() \ 709 MEM_DISCARD(init.rodata) \ 710 CLK_OF_TABLES() \ 711 RESERVEDMEM_OF_TABLES() \ 712 TIMER_OF_TABLES() \ 713 CPU_METHOD_OF_TABLES() \ 714 CPUIDLE_METHOD_OF_TABLES() \ 715 KERNEL_DTB() \ 716 IRQCHIP_OF_MATCH_TABLE() \ 717 ACPI_PROBE_TABLE(irqchip) \ 718 ACPI_PROBE_TABLE(timer) \ 719 THERMAL_TABLE(governor) \ 720 EARLYCON_TABLE() \ 721 LSM_TABLE() \ 722 EARLY_LSM_TABLE() \ 723 KUNIT_INIT_TABLE() 724 725 #define INIT_TEXT \ 726 *(.init.text .init.text.*) \ 727 *(.text.startup) \ 728 MEM_DISCARD(init.text*) 729 730 #define EXIT_DATA \ 731 *(.exit.data .exit.data.*) \ 732 *(.fini_array .fini_array.*) \ 733 *(.dtors .dtors.*) \ 734 735 #define EXIT_TEXT \ 736 *(.exit.text) \ 737 *(.text.exit) \ 738 739 #define EXIT_CALL \ 740 *(.exitcall.exit) 741 742 /* 743 * bss (Block Started by Symbol) - uninitialized data 744 * zeroed during startup 745 */ 746 #define SBSS(sbss_align) \ 747 . = ALIGN(sbss_align); \ 748 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \ 749 *(.dynsbss) \ 750 *(SBSS_MAIN) \ 751 *(.scommon) \ 752 } 753 754 /* 755 * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra 756 * sections to the front of bss. 757 */ 758 #ifndef BSS_FIRST_SECTIONS 759 #define BSS_FIRST_SECTIONS 760 #endif 761 762 #define BSS(bss_align) \ 763 . = ALIGN(bss_align); \ 764 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \ 765 BSS_FIRST_SECTIONS \ 766 . = ALIGN(PAGE_SIZE); \ 767 *(.bss..page_aligned) \ 768 . = ALIGN(PAGE_SIZE); \ 769 *(.dynbss) \ 770 *(BSS_MAIN) \ 771 *(COMMON) \ 772 } 773 774 /* 775 * DWARF debug sections. 776 * Symbols in the DWARF debugging sections are relative to 777 * the beginning of the section so we begin them at 0. 778 */ 779 #define DWARF_DEBUG \ 780 /* DWARF 1 */ \ 781 .debug 0 : { *(.debug) } \ 782 .line 0 : { *(.line) } \ 783 /* GNU DWARF 1 extensions */ \ 784 .debug_srcinfo 0 : { *(.debug_srcinfo) } \ 785 .debug_sfnames 0 : { *(.debug_sfnames) } \ 786 /* DWARF 1.1 and DWARF 2 */ \ 787 .debug_aranges 0 : { *(.debug_aranges) } \ 788 .debug_pubnames 0 : { *(.debug_pubnames) } \ 789 /* DWARF 2 */ \ 790 .debug_info 0 : { *(.debug_info \ 791 .gnu.linkonce.wi.*) } \ 792 .debug_abbrev 0 : { *(.debug_abbrev) } \ 793 .debug_line 0 : { *(.debug_line) } \ 794 .debug_frame 0 : { *(.debug_frame) } \ 795 .debug_str 0 : { *(.debug_str) } \ 796 .debug_loc 0 : { *(.debug_loc) } \ 797 .debug_macinfo 0 : { *(.debug_macinfo) } \ 798 .debug_pubtypes 0 : { *(.debug_pubtypes) } \ 799 /* DWARF 3 */ \ 800 .debug_ranges 0 : { *(.debug_ranges) } \ 801 /* SGI/MIPS DWARF 2 extensions */ \ 802 .debug_weaknames 0 : { *(.debug_weaknames) } \ 803 .debug_funcnames 0 : { *(.debug_funcnames) } \ 804 .debug_typenames 0 : { *(.debug_typenames) } \ 805 .debug_varnames 0 : { *(.debug_varnames) } \ 806 /* GNU DWARF 2 extensions */ \ 807 .debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) } \ 808 .debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) } \ 809 /* DWARF 4 */ \ 810 .debug_types 0 : { *(.debug_types) } \ 811 /* DWARF 5 */ \ 812 .debug_addr 0 : { *(.debug_addr) } \ 813 .debug_line_str 0 : { *(.debug_line_str) } \ 814 .debug_loclists 0 : { *(.debug_loclists) } \ 815 .debug_macro 0 : { *(.debug_macro) } \ 816 .debug_names 0 : { *(.debug_names) } \ 817 .debug_rnglists 0 : { *(.debug_rnglists) } \ 818 .debug_str_offsets 0 : { *(.debug_str_offsets) } 819 820 /* Stabs debugging sections. */ 821 #define STABS_DEBUG \ 822 .stab 0 : { *(.stab) } \ 823 .stabstr 0 : { *(.stabstr) } \ 824 .stab.excl 0 : { *(.stab.excl) } \ 825 .stab.exclstr 0 : { *(.stab.exclstr) } \ 826 .stab.index 0 : { *(.stab.index) } \ 827 .stab.indexstr 0 : { *(.stab.indexstr) } 828 829 /* Required sections not related to debugging. */ 830 #define ELF_DETAILS \ 831 .comment 0 : { *(.comment) } \ 832 .symtab 0 : { *(.symtab) } \ 833 .strtab 0 : { *(.strtab) } \ 834 .shstrtab 0 : { *(.shstrtab) } 835 836 #ifdef CONFIG_GENERIC_BUG 837 #define BUG_TABLE \ 838 . = ALIGN(8); \ 839 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \ 840 BOUNDED_SECTION_BY(__bug_table, ___bug_table) \ 841 } 842 #else 843 #define BUG_TABLE 844 #endif 845 846 #ifdef CONFIG_UNWINDER_ORC 847 #define ORC_UNWIND_TABLE \ 848 .orc_header : AT(ADDR(.orc_header) - LOAD_OFFSET) { \ 849 BOUNDED_SECTION_BY(.orc_header, _orc_header) \ 850 } \ 851 . = ALIGN(4); \ 852 .orc_unwind_ip : AT(ADDR(.orc_unwind_ip) - LOAD_OFFSET) { \ 853 BOUNDED_SECTION_BY(.orc_unwind_ip, _orc_unwind_ip) \ 854 } \ 855 . = ALIGN(2); \ 856 .orc_unwind : AT(ADDR(.orc_unwind) - LOAD_OFFSET) { \ 857 BOUNDED_SECTION_BY(.orc_unwind, _orc_unwind) \ 858 } \ 859 text_size = _etext - _stext; \ 860 . = ALIGN(4); \ 861 .orc_lookup : AT(ADDR(.orc_lookup) - LOAD_OFFSET) { \ 862 orc_lookup = .; \ 863 . += (((text_size + LOOKUP_BLOCK_SIZE - 1) / \ 864 LOOKUP_BLOCK_SIZE) + 1) * 4; \ 865 orc_lookup_end = .; \ 866 } 867 #else 868 #define ORC_UNWIND_TABLE 869 #endif 870 871 /* Built-in firmware blobs */ 872 #ifdef CONFIG_FW_LOADER 873 #define FW_LOADER_BUILT_IN_DATA \ 874 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) ALIGN(8) { \ 875 BOUNDED_SECTION_PRE_LABEL(.builtin_fw, _builtin_fw, __start, __end) \ 876 } 877 #else 878 #define FW_LOADER_BUILT_IN_DATA 879 #endif 880 881 #ifdef CONFIG_PM_TRACE 882 #define TRACEDATA \ 883 . = ALIGN(4); \ 884 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \ 885 BOUNDED_SECTION_POST_LABEL(.tracedata, __tracedata, _start, _end) \ 886 } 887 #else 888 #define TRACEDATA 889 #endif 890 891 #ifdef CONFIG_PRINTK_INDEX 892 #define PRINTK_INDEX \ 893 .printk_index : AT(ADDR(.printk_index) - LOAD_OFFSET) { \ 894 BOUNDED_SECTION_BY(.printk_index, _printk_index) \ 895 } 896 #else 897 #define PRINTK_INDEX 898 #endif 899 900 /* 901 * Discard .note.GNU-stack, which is emitted as PROGBITS by the compiler. 902 * Otherwise, the type of .notes section would become PROGBITS instead of NOTES. 903 * 904 * Also, discard .note.gnu.property, otherwise it forces the notes section to 905 * be 8-byte aligned which causes alignment mismatches with the kernel's custom 906 * 4-byte aligned notes. 907 */ 908 #define NOTES \ 909 /DISCARD/ : { \ 910 *(.note.GNU-stack) \ 911 *(.note.gnu.property) \ 912 } \ 913 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \ 914 BOUNDED_SECTION_BY(.note.*, _notes) \ 915 } NOTES_HEADERS \ 916 NOTES_HEADERS_RESTORE 917 918 #define INIT_SETUP(initsetup_align) \ 919 . = ALIGN(initsetup_align); \ 920 BOUNDED_SECTION_POST_LABEL(.init.setup, __setup, _start, _end) 921 922 #define INIT_CALLS_LEVEL(level) \ 923 __initcall##level##_start = .; \ 924 KEEP(*(.initcall##level##.init)) \ 925 KEEP(*(.initcall##level##s.init)) \ 926 927 #define INIT_CALLS \ 928 __initcall_start = .; \ 929 KEEP(*(.initcallearly.init)) \ 930 INIT_CALLS_LEVEL(0) \ 931 INIT_CALLS_LEVEL(1) \ 932 INIT_CALLS_LEVEL(2) \ 933 INIT_CALLS_LEVEL(3) \ 934 INIT_CALLS_LEVEL(4) \ 935 INIT_CALLS_LEVEL(5) \ 936 INIT_CALLS_LEVEL(rootfs) \ 937 INIT_CALLS_LEVEL(6) \ 938 INIT_CALLS_LEVEL(7) \ 939 __initcall_end = .; 940 941 #define CON_INITCALL \ 942 BOUNDED_SECTION_POST_LABEL(.con_initcall.init, __con_initcall, _start, _end) 943 944 /* Alignment must be consistent with (kunit_suite *) in include/kunit/test.h */ 945 #define KUNIT_TABLE() \ 946 . = ALIGN(8); \ 947 BOUNDED_SECTION_POST_LABEL(.kunit_test_suites, __kunit_suites, _start, _end) 948 949 /* Alignment must be consistent with (kunit_suite *) in include/kunit/test.h */ 950 #define KUNIT_INIT_TABLE() \ 951 . = ALIGN(8); \ 952 BOUNDED_SECTION_POST_LABEL(.kunit_init_test_suites, \ 953 __kunit_init_suites, _start, _end) 954 955 #ifdef CONFIG_BLK_DEV_INITRD 956 #define INIT_RAM_FS \ 957 . = ALIGN(4); \ 958 __initramfs_start = .; \ 959 KEEP(*(.init.ramfs)) \ 960 . = ALIGN(8); \ 961 KEEP(*(.init.ramfs.info)) 962 #else 963 #define INIT_RAM_FS 964 #endif 965 966 /* 967 * Memory encryption operates on a page basis. Since we need to clear 968 * the memory encryption mask for this section, it needs to be aligned 969 * on a page boundary and be a page-size multiple in length. 970 * 971 * Note: We use a separate section so that only this section gets 972 * decrypted to avoid exposing more than we wish. 973 */ 974 #ifdef CONFIG_AMD_MEM_ENCRYPT 975 #define PERCPU_DECRYPTED_SECTION \ 976 . = ALIGN(PAGE_SIZE); \ 977 *(.data..percpu..decrypted) \ 978 . = ALIGN(PAGE_SIZE); 979 #else 980 #define PERCPU_DECRYPTED_SECTION 981 #endif 982 983 984 /* 985 * Default discarded sections. 986 * 987 * Some archs want to discard exit text/data at runtime rather than 988 * link time due to cross-section references such as alt instructions, 989 * bug table, eh_frame, etc. DISCARDS must be the last of output 990 * section definitions so that such archs put those in earlier section 991 * definitions. 992 */ 993 #ifdef RUNTIME_DISCARD_EXIT 994 #define EXIT_DISCARDS 995 #else 996 #define EXIT_DISCARDS \ 997 EXIT_TEXT \ 998 EXIT_DATA 999 #endif 1000 1001 /* 1002 * Clang's -fprofile-arcs, -fsanitize=kernel-address, and 1003 * -fsanitize=thread produce unwanted sections (.eh_frame 1004 * and .init_array.*), but CONFIG_CONSTRUCTORS wants to 1005 * keep any .init_array.* sections. 1006 * https://llvm.org/pr46478 1007 */ 1008 #ifdef CONFIG_UNWIND_TABLES 1009 #define DISCARD_EH_FRAME 1010 #else 1011 #define DISCARD_EH_FRAME *(.eh_frame) 1012 #endif 1013 #if defined(CONFIG_GCOV_KERNEL) || defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KCSAN) 1014 # ifdef CONFIG_CONSTRUCTORS 1015 # define SANITIZER_DISCARDS \ 1016 DISCARD_EH_FRAME 1017 # else 1018 # define SANITIZER_DISCARDS \ 1019 *(.init_array) *(.init_array.*) \ 1020 DISCARD_EH_FRAME 1021 # endif 1022 #else 1023 # define SANITIZER_DISCARDS 1024 #endif 1025 1026 #define COMMON_DISCARDS \ 1027 SANITIZER_DISCARDS \ 1028 PATCHABLE_DISCARDS \ 1029 *(.discard) \ 1030 *(.discard.*) \ 1031 *(.export_symbol) \ 1032 *(.modinfo) \ 1033 /* ld.bfd warns about .gnu.version* even when not emitted */ \ 1034 *(.gnu.version*) \ 1035 1036 #define DISCARDS \ 1037 /DISCARD/ : { \ 1038 EXIT_DISCARDS \ 1039 EXIT_CALL \ 1040 COMMON_DISCARDS \ 1041 } 1042 1043 /** 1044 * PERCPU_INPUT - the percpu input sections 1045 * @cacheline: cacheline size 1046 * 1047 * The core percpu section names and core symbols which do not rely 1048 * directly upon load addresses. 1049 * 1050 * @cacheline is used to align subsections to avoid false cacheline 1051 * sharing between subsections for different purposes. 1052 */ 1053 #define PERCPU_INPUT(cacheline) \ 1054 __per_cpu_start = .; \ 1055 *(.data..percpu..first) \ 1056 . = ALIGN(PAGE_SIZE); \ 1057 *(.data..percpu..page_aligned) \ 1058 . = ALIGN(cacheline); \ 1059 *(.data..percpu..read_mostly) \ 1060 . = ALIGN(cacheline); \ 1061 *(.data..percpu) \ 1062 *(.data..percpu..shared_aligned) \ 1063 PERCPU_DECRYPTED_SECTION \ 1064 __per_cpu_end = .; 1065 1066 /** 1067 * PERCPU_VADDR - define output section for percpu area 1068 * @cacheline: cacheline size 1069 * @vaddr: explicit base address (optional) 1070 * @phdr: destination PHDR (optional) 1071 * 1072 * Macro which expands to output section for percpu area. 1073 * 1074 * @cacheline is used to align subsections to avoid false cacheline 1075 * sharing between subsections for different purposes. 1076 * 1077 * If @vaddr is not blank, it specifies explicit base address and all 1078 * percpu symbols will be offset from the given address. If blank, 1079 * @vaddr always equals @laddr + LOAD_OFFSET. 1080 * 1081 * @phdr defines the output PHDR to use if not blank. Be warned that 1082 * output PHDR is sticky. If @phdr is specified, the next output 1083 * section in the linker script will go there too. @phdr should have 1084 * a leading colon. 1085 * 1086 * Note that this macros defines __per_cpu_load as an absolute symbol. 1087 * If there is no need to put the percpu section at a predetermined 1088 * address, use PERCPU_SECTION. 1089 */ 1090 #define PERCPU_VADDR(cacheline, vaddr, phdr) \ 1091 __per_cpu_load = .; \ 1092 .data..percpu vaddr : AT(__per_cpu_load - LOAD_OFFSET) { \ 1093 PERCPU_INPUT(cacheline) \ 1094 } phdr \ 1095 . = __per_cpu_load + SIZEOF(.data..percpu); 1096 1097 /** 1098 * PERCPU_SECTION - define output section for percpu area, simple version 1099 * @cacheline: cacheline size 1100 * 1101 * Align to PAGE_SIZE and outputs output section for percpu area. This 1102 * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and 1103 * __per_cpu_start will be identical. 1104 * 1105 * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,) 1106 * except that __per_cpu_load is defined as a relative symbol against 1107 * .data..percpu which is required for relocatable x86_32 configuration. 1108 */ 1109 #define PERCPU_SECTION(cacheline) \ 1110 . = ALIGN(PAGE_SIZE); \ 1111 .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \ 1112 __per_cpu_load = .; \ 1113 PERCPU_INPUT(cacheline) \ 1114 } 1115 1116 1117 /* 1118 * Definition of the high level *_SECTION macros 1119 * They will fit only a subset of the architectures 1120 */ 1121 1122 1123 /* 1124 * Writeable data. 1125 * All sections are combined in a single .data section. 1126 * The sections following CONSTRUCTORS are arranged so their 1127 * typical alignment matches. 1128 * A cacheline is typical/always less than a PAGE_SIZE so 1129 * the sections that has this restriction (or similar) 1130 * is located before the ones requiring PAGE_SIZE alignment. 1131 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which 1132 * matches the requirement of PAGE_ALIGNED_DATA. 1133 * 1134 * use 0 as page_align if page_aligned data is not used */ 1135 #define RW_DATA(cacheline, pagealigned, inittask) \ 1136 . = ALIGN(PAGE_SIZE); \ 1137 .data : AT(ADDR(.data) - LOAD_OFFSET) { \ 1138 INIT_TASK_DATA(inittask) \ 1139 NOSAVE_DATA \ 1140 PAGE_ALIGNED_DATA(pagealigned) \ 1141 CACHELINE_ALIGNED_DATA(cacheline) \ 1142 READ_MOSTLY_DATA(cacheline) \ 1143 DATA_DATA \ 1144 CONSTRUCTORS \ 1145 } \ 1146 BUG_TABLE \ 1147 1148 #define INIT_TEXT_SECTION(inittext_align) \ 1149 . = ALIGN(inittext_align); \ 1150 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \ 1151 _sinittext = .; \ 1152 INIT_TEXT \ 1153 _einittext = .; \ 1154 } 1155 1156 #define INIT_DATA_SECTION(initsetup_align) \ 1157 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \ 1158 INIT_DATA \ 1159 INIT_SETUP(initsetup_align) \ 1160 INIT_CALLS \ 1161 CON_INITCALL \ 1162 INIT_RAM_FS \ 1163 } 1164 1165 #define BSS_SECTION(sbss_align, bss_align, stop_align) \ 1166 . = ALIGN(sbss_align); \ 1167 __bss_start = .; \ 1168 SBSS(sbss_align) \ 1169 BSS(bss_align) \ 1170 . = ALIGN(stop_align); \ 1171 __bss_stop = .; 1172