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 * With AUTOFDO_CLANG and PROPELLER_CLANG, by default, the linker splits 99 * text sections and regroups functions into subsections. 100 * 101 * RODATA_MAIN is not used because existing code already defines .rodata.x 102 * sections to be brought in with rodata. 103 */ 104 #if defined(CONFIG_LD_DEAD_CODE_DATA_ELIMINATION) || defined(CONFIG_LTO_CLANG) || \ 105 defined(CONFIG_AUTOFDO_CLANG) || defined(CONFIG_PROPELLER_CLANG) 106 #define TEXT_MAIN .text .text.[0-9a-zA-Z_]* 107 #else 108 #define TEXT_MAIN .text 109 #endif 110 #if defined(CONFIG_LD_DEAD_CODE_DATA_ELIMINATION) || defined(CONFIG_LTO_CLANG) 111 #define DATA_MAIN .data .data.[0-9a-zA-Z_]* .data..L* .data..compoundliteral* .data.$__unnamed_* .data.$L* 112 #define SDATA_MAIN .sdata .sdata.[0-9a-zA-Z_]* 113 #define RODATA_MAIN .rodata .rodata.[0-9a-zA-Z_]* .rodata..L* 114 #define BSS_MAIN .bss .bss.[0-9a-zA-Z_]* .bss..L* .bss..compoundliteral* 115 #define SBSS_MAIN .sbss .sbss.[0-9a-zA-Z_]* 116 #else 117 #define DATA_MAIN .data 118 #define SDATA_MAIN .sdata 119 #define RODATA_MAIN .rodata 120 #define BSS_MAIN .bss 121 #define SBSS_MAIN .sbss 122 #endif 123 124 /* 125 * GCC 4.5 and later have a 32 bytes section alignment for structures. 126 * Except GCC 4.9, that feels the need to align on 64 bytes. 127 */ 128 #define STRUCT_ALIGNMENT 32 129 #define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT) 130 131 /* 132 * The order of the sched class addresses are important, as they are 133 * used to determine the order of the priority of each sched class in 134 * relation to each other. 135 */ 136 #define SCHED_DATA \ 137 STRUCT_ALIGN(); \ 138 __sched_class_highest = .; \ 139 *(__stop_sched_class) \ 140 *(__dl_sched_class) \ 141 *(__rt_sched_class) \ 142 *(__fair_sched_class) \ 143 *(__ext_sched_class) \ 144 *(__idle_sched_class) \ 145 __sched_class_lowest = .; 146 147 /* The actual configuration determine if the init/exit sections 148 * are handled as text/data or they can be discarded (which 149 * often happens at runtime) 150 */ 151 152 #ifndef CONFIG_HAVE_DYNAMIC_FTRACE_NO_PATCHABLE 153 #define KEEP_PATCHABLE KEEP(*(__patchable_function_entries)) 154 #define PATCHABLE_DISCARDS 155 #else 156 #define KEEP_PATCHABLE 157 #define PATCHABLE_DISCARDS *(__patchable_function_entries) 158 #endif 159 160 #ifndef CONFIG_ARCH_SUPPORTS_CFI_CLANG 161 /* 162 * Simply points to ftrace_stub, but with the proper protocol. 163 * Defined by the linker script in linux/vmlinux.lds.h 164 */ 165 #define FTRACE_STUB_HACK ftrace_stub_graph = ftrace_stub; 166 #else 167 #define FTRACE_STUB_HACK 168 #endif 169 170 #ifdef CONFIG_FTRACE_MCOUNT_RECORD 171 /* 172 * The ftrace call sites are logged to a section whose name depends on the 173 * compiler option used. A given kernel image will only use one, AKA 174 * FTRACE_CALLSITE_SECTION. We capture all of them here to avoid header 175 * dependencies for FTRACE_CALLSITE_SECTION's definition. 176 * 177 * ftrace_ops_list_func will be defined as arch_ftrace_ops_list_func 178 * as some archs will have a different prototype for that function 179 * but ftrace_ops_list_func() will have a single prototype. 180 */ 181 #define MCOUNT_REC() . = ALIGN(8); \ 182 __start_mcount_loc = .; \ 183 KEEP(*(__mcount_loc)) \ 184 KEEP_PATCHABLE \ 185 __stop_mcount_loc = .; \ 186 FTRACE_STUB_HACK \ 187 ftrace_ops_list_func = arch_ftrace_ops_list_func; 188 #else 189 # ifdef CONFIG_FUNCTION_TRACER 190 # define MCOUNT_REC() FTRACE_STUB_HACK \ 191 ftrace_ops_list_func = arch_ftrace_ops_list_func; 192 # else 193 # define MCOUNT_REC() 194 # endif 195 #endif 196 197 #define BOUNDED_SECTION_PRE_LABEL(_sec_, _label_, _BEGIN_, _END_) \ 198 _BEGIN_##_label_ = .; \ 199 KEEP(*(_sec_)) \ 200 _END_##_label_ = .; 201 202 #define BOUNDED_SECTION_POST_LABEL(_sec_, _label_, _BEGIN_, _END_) \ 203 _label_##_BEGIN_ = .; \ 204 KEEP(*(_sec_)) \ 205 _label_##_END_ = .; 206 207 #define BOUNDED_SECTION_BY(_sec_, _label_) \ 208 BOUNDED_SECTION_PRE_LABEL(_sec_, _label_, __start, __stop) 209 210 #define BOUNDED_SECTION(_sec) BOUNDED_SECTION_BY(_sec, _sec) 211 212 #define HEADERED_SECTION_PRE_LABEL(_sec_, _label_, _BEGIN_, _END_, _HDR_) \ 213 _HDR_##_label_ = .; \ 214 KEEP(*(.gnu.linkonce.##_sec_)) \ 215 BOUNDED_SECTION_PRE_LABEL(_sec_, _label_, _BEGIN_, _END_) 216 217 #define HEADERED_SECTION_POST_LABEL(_sec_, _label_, _BEGIN_, _END_, _HDR_) \ 218 _label_##_HDR_ = .; \ 219 KEEP(*(.gnu.linkonce.##_sec_)) \ 220 BOUNDED_SECTION_POST_LABEL(_sec_, _label_, _BEGIN_, _END_) 221 222 #define HEADERED_SECTION_BY(_sec_, _label_) \ 223 HEADERED_SECTION_PRE_LABEL(_sec_, _label_, __start, __stop) 224 225 #define HEADERED_SECTION(_sec) HEADERED_SECTION_BY(_sec, _sec) 226 227 #ifdef CONFIG_TRACE_BRANCH_PROFILING 228 #define LIKELY_PROFILE() \ 229 BOUNDED_SECTION_BY(_ftrace_annotated_branch, _annotated_branch_profile) 230 #else 231 #define LIKELY_PROFILE() 232 #endif 233 234 #ifdef CONFIG_PROFILE_ALL_BRANCHES 235 #define BRANCH_PROFILE() \ 236 BOUNDED_SECTION_BY(_ftrace_branch, _branch_profile) 237 #else 238 #define BRANCH_PROFILE() 239 #endif 240 241 #ifdef CONFIG_KPROBES 242 #define KPROBE_BLACKLIST() \ 243 . = ALIGN(8); \ 244 BOUNDED_SECTION(_kprobe_blacklist) 245 #else 246 #define KPROBE_BLACKLIST() 247 #endif 248 249 #ifdef CONFIG_FUNCTION_ERROR_INJECTION 250 #define ERROR_INJECT_WHITELIST() \ 251 STRUCT_ALIGN(); \ 252 BOUNDED_SECTION(_error_injection_whitelist) 253 #else 254 #define ERROR_INJECT_WHITELIST() 255 #endif 256 257 #ifdef CONFIG_EVENT_TRACING 258 #define FTRACE_EVENTS() \ 259 . = ALIGN(8); \ 260 BOUNDED_SECTION(_ftrace_events) \ 261 BOUNDED_SECTION_BY(_ftrace_eval_map, _ftrace_eval_maps) 262 #else 263 #define FTRACE_EVENTS() 264 #endif 265 266 #ifdef CONFIG_TRACING 267 #define TRACE_PRINTKS() BOUNDED_SECTION_BY(__trace_printk_fmt, ___trace_bprintk_fmt) 268 #define TRACEPOINT_STR() BOUNDED_SECTION_BY(__tracepoint_str, ___tracepoint_str) 269 #else 270 #define TRACE_PRINTKS() 271 #define TRACEPOINT_STR() 272 #endif 273 274 #ifdef CONFIG_FTRACE_SYSCALLS 275 #define TRACE_SYSCALLS() \ 276 . = ALIGN(8); \ 277 BOUNDED_SECTION_BY(__syscalls_metadata, _syscalls_metadata) 278 #else 279 #define TRACE_SYSCALLS() 280 #endif 281 282 #ifdef CONFIG_BPF_EVENTS 283 #define BPF_RAW_TP() STRUCT_ALIGN(); \ 284 BOUNDED_SECTION_BY(__bpf_raw_tp_map, __bpf_raw_tp) 285 #else 286 #define BPF_RAW_TP() 287 #endif 288 289 #ifdef CONFIG_SERIAL_EARLYCON 290 #define EARLYCON_TABLE() \ 291 . = ALIGN(8); \ 292 BOUNDED_SECTION_POST_LABEL(__earlycon_table, __earlycon_table, , _end) 293 #else 294 #define EARLYCON_TABLE() 295 #endif 296 297 #ifdef CONFIG_SECURITY 298 #define LSM_TABLE() \ 299 . = ALIGN(8); \ 300 BOUNDED_SECTION_PRE_LABEL(.lsm_info.init, _lsm_info, __start, __end) 301 302 #define EARLY_LSM_TABLE() \ 303 . = ALIGN(8); \ 304 BOUNDED_SECTION_PRE_LABEL(.early_lsm_info.init, _early_lsm_info, __start, __end) 305 #else 306 #define LSM_TABLE() 307 #define EARLY_LSM_TABLE() 308 #endif 309 310 #define ___OF_TABLE(cfg, name) _OF_TABLE_##cfg(name) 311 #define __OF_TABLE(cfg, name) ___OF_TABLE(cfg, name) 312 #define OF_TABLE(cfg, name) __OF_TABLE(IS_ENABLED(cfg), name) 313 #define _OF_TABLE_0(name) 314 #define _OF_TABLE_1(name) \ 315 . = ALIGN(8); \ 316 __##name##_of_table = .; \ 317 KEEP(*(__##name##_of_table)) \ 318 KEEP(*(__##name##_of_table_end)) 319 320 #define TIMER_OF_TABLES() OF_TABLE(CONFIG_TIMER_OF, timer) 321 #define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip) 322 #define CLK_OF_TABLES() OF_TABLE(CONFIG_COMMON_CLK, clk) 323 #define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem) 324 #define CPU_METHOD_OF_TABLES() OF_TABLE(CONFIG_SMP, cpu_method) 325 #define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method) 326 327 #ifdef CONFIG_ACPI 328 #define ACPI_PROBE_TABLE(name) \ 329 . = ALIGN(8); \ 330 BOUNDED_SECTION_POST_LABEL(__##name##_acpi_probe_table, \ 331 __##name##_acpi_probe_table,, _end) 332 #else 333 #define ACPI_PROBE_TABLE(name) 334 #endif 335 336 #ifdef CONFIG_THERMAL 337 #define THERMAL_TABLE(name) \ 338 . = ALIGN(8); \ 339 BOUNDED_SECTION_POST_LABEL(__##name##_thermal_table, \ 340 __##name##_thermal_table,, _end) 341 #else 342 #define THERMAL_TABLE(name) 343 #endif 344 345 #define KERNEL_DTB() \ 346 STRUCT_ALIGN(); \ 347 __dtb_start = .; \ 348 KEEP(*(.dtb.init.rodata)) \ 349 __dtb_end = .; 350 351 /* 352 * .data section 353 */ 354 #define DATA_DATA \ 355 *(.xiptext) \ 356 *(DATA_MAIN) \ 357 *(.data..decrypted) \ 358 *(.ref.data) \ 359 *(.data..shared_aligned) /* percpu related */ \ 360 *(.data..unlikely) \ 361 __start_once = .; \ 362 *(.data..once) \ 363 __end_once = .; \ 364 STRUCT_ALIGN(); \ 365 *(__tracepoints) \ 366 /* implement dynamic printk debug */ \ 367 . = ALIGN(8); \ 368 BOUNDED_SECTION_BY(__dyndbg_classes, ___dyndbg_classes) \ 369 BOUNDED_SECTION_BY(__dyndbg, ___dyndbg) \ 370 CODETAG_SECTIONS() \ 371 LIKELY_PROFILE() \ 372 BRANCH_PROFILE() \ 373 TRACE_PRINTKS() \ 374 BPF_RAW_TP() \ 375 TRACEPOINT_STR() \ 376 KUNIT_TABLE() 377 378 /* 379 * Data section helpers 380 */ 381 #define NOSAVE_DATA \ 382 . = ALIGN(PAGE_SIZE); \ 383 __nosave_begin = .; \ 384 *(.data..nosave) \ 385 . = ALIGN(PAGE_SIZE); \ 386 __nosave_end = .; 387 388 #define PAGE_ALIGNED_DATA(page_align) \ 389 . = ALIGN(page_align); \ 390 *(.data..page_aligned) \ 391 . = ALIGN(page_align); 392 393 #define READ_MOSTLY_DATA(align) \ 394 . = ALIGN(align); \ 395 *(.data..read_mostly) \ 396 . = ALIGN(align); 397 398 #define CACHELINE_ALIGNED_DATA(align) \ 399 . = ALIGN(align); \ 400 *(.data..cacheline_aligned) 401 402 #define INIT_TASK_DATA(align) \ 403 . = ALIGN(align); \ 404 __start_init_stack = .; \ 405 init_thread_union = .; \ 406 init_stack = .; \ 407 KEEP(*(.data..init_thread_info)) \ 408 . = __start_init_stack + THREAD_SIZE; \ 409 __end_init_stack = .; 410 411 #define JUMP_TABLE_DATA \ 412 . = ALIGN(8); \ 413 BOUNDED_SECTION_BY(__jump_table, ___jump_table) 414 415 #ifdef CONFIG_HAVE_STATIC_CALL_INLINE 416 #define STATIC_CALL_DATA \ 417 . = ALIGN(8); \ 418 BOUNDED_SECTION_BY(.static_call_sites, _static_call_sites) \ 419 BOUNDED_SECTION_BY(.static_call_tramp_key, _static_call_tramp_key) 420 #else 421 #define STATIC_CALL_DATA 422 #endif 423 424 /* 425 * Allow architectures to handle ro_after_init data on their 426 * own by defining an empty RO_AFTER_INIT_DATA. 427 */ 428 #ifndef RO_AFTER_INIT_DATA 429 #define RO_AFTER_INIT_DATA \ 430 . = ALIGN(8); \ 431 __start_ro_after_init = .; \ 432 *(.data..ro_after_init) \ 433 JUMP_TABLE_DATA \ 434 STATIC_CALL_DATA \ 435 __end_ro_after_init = .; 436 #endif 437 438 /* 439 * .kcfi_traps contains a list KCFI trap locations. 440 */ 441 #ifndef KCFI_TRAPS 442 #ifdef CONFIG_ARCH_USES_CFI_TRAPS 443 #define KCFI_TRAPS \ 444 __kcfi_traps : AT(ADDR(__kcfi_traps) - LOAD_OFFSET) { \ 445 BOUNDED_SECTION_BY(.kcfi_traps, ___kcfi_traps) \ 446 } 447 #else 448 #define KCFI_TRAPS 449 #endif 450 #endif 451 452 /* 453 * Read only Data 454 */ 455 #define RO_DATA(align) \ 456 . = ALIGN((align)); \ 457 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \ 458 __start_rodata = .; \ 459 *(.rodata) *(.rodata.*) \ 460 SCHED_DATA \ 461 RO_AFTER_INIT_DATA /* Read only after init */ \ 462 . = ALIGN(8); \ 463 BOUNDED_SECTION_BY(__tracepoints_ptrs, ___tracepoints_ptrs) \ 464 *(__tracepoints_strings)/* Tracepoints: strings */ \ 465 } \ 466 \ 467 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \ 468 *(.rodata1) \ 469 } \ 470 \ 471 /* PCI quirks */ \ 472 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \ 473 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_early, _pci_fixups_early, __start, __end) \ 474 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_header, _pci_fixups_header, __start, __end) \ 475 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_final, _pci_fixups_final, __start, __end) \ 476 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_enable, _pci_fixups_enable, __start, __end) \ 477 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_resume, _pci_fixups_resume, __start, __end) \ 478 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_suspend, _pci_fixups_suspend, __start, __end) \ 479 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_resume_early, _pci_fixups_resume_early, __start, __end) \ 480 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_suspend_late, _pci_fixups_suspend_late, __start, __end) \ 481 } \ 482 \ 483 FW_LOADER_BUILT_IN_DATA \ 484 TRACEDATA \ 485 \ 486 PRINTK_INDEX \ 487 \ 488 /* Kernel symbol table: Normal symbols */ \ 489 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \ 490 __start___ksymtab = .; \ 491 KEEP(*(SORT(___ksymtab+*))) \ 492 __stop___ksymtab = .; \ 493 } \ 494 \ 495 /* Kernel symbol table: GPL-only symbols */ \ 496 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \ 497 __start___ksymtab_gpl = .; \ 498 KEEP(*(SORT(___ksymtab_gpl+*))) \ 499 __stop___ksymtab_gpl = .; \ 500 } \ 501 \ 502 /* Kernel symbol table: Normal symbols */ \ 503 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \ 504 __start___kcrctab = .; \ 505 KEEP(*(SORT(___kcrctab+*))) \ 506 __stop___kcrctab = .; \ 507 } \ 508 \ 509 /* Kernel symbol table: GPL-only symbols */ \ 510 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \ 511 __start___kcrctab_gpl = .; \ 512 KEEP(*(SORT(___kcrctab_gpl+*))) \ 513 __stop___kcrctab_gpl = .; \ 514 } \ 515 \ 516 /* Kernel symbol table: strings */ \ 517 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \ 518 *(__ksymtab_strings) \ 519 } \ 520 \ 521 /* __*init sections */ \ 522 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \ 523 *(.ref.rodata) \ 524 } \ 525 \ 526 /* Built-in module parameters. */ \ 527 __param : AT(ADDR(__param) - LOAD_OFFSET) { \ 528 BOUNDED_SECTION_BY(__param, ___param) \ 529 } \ 530 \ 531 /* Built-in module versions. */ \ 532 __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \ 533 BOUNDED_SECTION_BY(__modver, ___modver) \ 534 } \ 535 \ 536 KCFI_TRAPS \ 537 \ 538 RO_EXCEPTION_TABLE \ 539 NOTES \ 540 BTF \ 541 \ 542 . = ALIGN((align)); \ 543 __end_rodata = .; 544 545 546 /* 547 * Non-instrumentable text section 548 */ 549 #define NOINSTR_TEXT \ 550 ALIGN_FUNCTION(); \ 551 __noinstr_text_start = .; \ 552 *(.noinstr.text) \ 553 __cpuidle_text_start = .; \ 554 *(.cpuidle.text) \ 555 __cpuidle_text_end = .; \ 556 __noinstr_text_end = .; 557 558 #define TEXT_SPLIT \ 559 __split_text_start = .; \ 560 *(.text.split .text.split.[0-9a-zA-Z_]*) \ 561 __split_text_end = .; 562 563 #define TEXT_UNLIKELY \ 564 __unlikely_text_start = .; \ 565 *(.text.unlikely .text.unlikely.*) \ 566 __unlikely_text_end = .; 567 568 #define TEXT_HOT \ 569 __hot_text_start = .; \ 570 *(.text.hot .text.hot.*) \ 571 __hot_text_end = .; 572 573 /* 574 * .text section. Map to function alignment to avoid address changes 575 * during second ld run in second ld pass when generating System.map 576 * 577 * TEXT_MAIN here will match symbols with a fixed pattern (for example, 578 * .text.hot or .text.unlikely) if dead code elimination or 579 * function-section is enabled. Match these symbols first before 580 * TEXT_MAIN to ensure they are grouped together. 581 * 582 * Also placing .text.hot section at the beginning of a page, this 583 * would help the TLB performance. 584 */ 585 #define TEXT_TEXT \ 586 ALIGN_FUNCTION(); \ 587 *(.text.asan.* .text.tsan.*) \ 588 *(.text.unknown .text.unknown.*) \ 589 TEXT_SPLIT \ 590 TEXT_UNLIKELY \ 591 . = ALIGN(PAGE_SIZE); \ 592 TEXT_HOT \ 593 *(TEXT_MAIN .text.fixup) \ 594 NOINSTR_TEXT \ 595 *(.ref.text) 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 KERNEL_CTORS() \ 702 MCOUNT_REC() \ 703 *(.init.rodata .init.rodata.*) \ 704 FTRACE_EVENTS() \ 705 TRACE_SYSCALLS() \ 706 KPROBE_BLACKLIST() \ 707 ERROR_INJECT_WHITELIST() \ 708 CLK_OF_TABLES() \ 709 RESERVEDMEM_OF_TABLES() \ 710 TIMER_OF_TABLES() \ 711 CPU_METHOD_OF_TABLES() \ 712 CPUIDLE_METHOD_OF_TABLES() \ 713 KERNEL_DTB() \ 714 IRQCHIP_OF_MATCH_TABLE() \ 715 ACPI_PROBE_TABLE(irqchip) \ 716 ACPI_PROBE_TABLE(timer) \ 717 THERMAL_TABLE(governor) \ 718 EARLYCON_TABLE() \ 719 LSM_TABLE() \ 720 EARLY_LSM_TABLE() \ 721 KUNIT_INIT_TABLE() 722 723 #define INIT_TEXT \ 724 *(.init.text .init.text.*) \ 725 *(.text.startup) 726 727 #define EXIT_DATA \ 728 *(.exit.data .exit.data.*) \ 729 *(.fini_array .fini_array.*) \ 730 *(.dtors .dtors.*) \ 731 732 #define EXIT_TEXT \ 733 *(.exit.text) \ 734 *(.text.exit) \ 735 736 #define EXIT_CALL \ 737 *(.exitcall.exit) 738 739 /* 740 * bss (Block Started by Symbol) - uninitialized data 741 * zeroed during startup 742 */ 743 #define SBSS(sbss_align) \ 744 . = ALIGN(sbss_align); \ 745 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \ 746 *(.dynsbss) \ 747 *(SBSS_MAIN) \ 748 *(.scommon) \ 749 } 750 751 /* 752 * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra 753 * sections to the front of bss. 754 */ 755 #ifndef BSS_FIRST_SECTIONS 756 #define BSS_FIRST_SECTIONS 757 #endif 758 759 #define BSS(bss_align) \ 760 . = ALIGN(bss_align); \ 761 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \ 762 BSS_FIRST_SECTIONS \ 763 . = ALIGN(PAGE_SIZE); \ 764 *(.bss..page_aligned) \ 765 . = ALIGN(PAGE_SIZE); \ 766 *(.dynbss) \ 767 *(BSS_MAIN) \ 768 *(COMMON) \ 769 } 770 771 /* 772 * DWARF debug sections. 773 * Symbols in the DWARF debugging sections are relative to 774 * the beginning of the section so we begin them at 0. 775 */ 776 #define DWARF_DEBUG \ 777 /* DWARF 1 */ \ 778 .debug 0 : { *(.debug) } \ 779 .line 0 : { *(.line) } \ 780 /* GNU DWARF 1 extensions */ \ 781 .debug_srcinfo 0 : { *(.debug_srcinfo) } \ 782 .debug_sfnames 0 : { *(.debug_sfnames) } \ 783 /* DWARF 1.1 and DWARF 2 */ \ 784 .debug_aranges 0 : { *(.debug_aranges) } \ 785 .debug_pubnames 0 : { *(.debug_pubnames) } \ 786 /* DWARF 2 */ \ 787 .debug_info 0 : { *(.debug_info \ 788 .gnu.linkonce.wi.*) } \ 789 .debug_abbrev 0 : { *(.debug_abbrev) } \ 790 .debug_line 0 : { *(.debug_line) } \ 791 .debug_frame 0 : { *(.debug_frame) } \ 792 .debug_str 0 : { *(.debug_str) } \ 793 .debug_loc 0 : { *(.debug_loc) } \ 794 .debug_macinfo 0 : { *(.debug_macinfo) } \ 795 .debug_pubtypes 0 : { *(.debug_pubtypes) } \ 796 /* DWARF 3 */ \ 797 .debug_ranges 0 : { *(.debug_ranges) } \ 798 /* SGI/MIPS DWARF 2 extensions */ \ 799 .debug_weaknames 0 : { *(.debug_weaknames) } \ 800 .debug_funcnames 0 : { *(.debug_funcnames) } \ 801 .debug_typenames 0 : { *(.debug_typenames) } \ 802 .debug_varnames 0 : { *(.debug_varnames) } \ 803 /* GNU DWARF 2 extensions */ \ 804 .debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) } \ 805 .debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) } \ 806 /* DWARF 4 */ \ 807 .debug_types 0 : { *(.debug_types) } \ 808 /* DWARF 5 */ \ 809 .debug_addr 0 : { *(.debug_addr) } \ 810 .debug_line_str 0 : { *(.debug_line_str) } \ 811 .debug_loclists 0 : { *(.debug_loclists) } \ 812 .debug_macro 0 : { *(.debug_macro) } \ 813 .debug_names 0 : { *(.debug_names) } \ 814 .debug_rnglists 0 : { *(.debug_rnglists) } \ 815 .debug_str_offsets 0 : { *(.debug_str_offsets) } 816 817 /* Stabs debugging sections. */ 818 #define STABS_DEBUG \ 819 .stab 0 : { *(.stab) } \ 820 .stabstr 0 : { *(.stabstr) } \ 821 .stab.excl 0 : { *(.stab.excl) } \ 822 .stab.exclstr 0 : { *(.stab.exclstr) } \ 823 .stab.index 0 : { *(.stab.index) } \ 824 .stab.indexstr 0 : { *(.stab.indexstr) } 825 826 /* Required sections not related to debugging. */ 827 #define ELF_DETAILS \ 828 .comment 0 : { *(.comment) } \ 829 .symtab 0 : { *(.symtab) } \ 830 .strtab 0 : { *(.strtab) } \ 831 .shstrtab 0 : { *(.shstrtab) } 832 833 #ifdef CONFIG_GENERIC_BUG 834 #define BUG_TABLE \ 835 . = ALIGN(8); \ 836 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \ 837 BOUNDED_SECTION_BY(__bug_table, ___bug_table) \ 838 } 839 #else 840 #define BUG_TABLE 841 #endif 842 843 #ifdef CONFIG_UNWINDER_ORC 844 #define ORC_UNWIND_TABLE \ 845 .orc_header : AT(ADDR(.orc_header) - LOAD_OFFSET) { \ 846 BOUNDED_SECTION_BY(.orc_header, _orc_header) \ 847 } \ 848 . = ALIGN(4); \ 849 .orc_unwind_ip : AT(ADDR(.orc_unwind_ip) - LOAD_OFFSET) { \ 850 BOUNDED_SECTION_BY(.orc_unwind_ip, _orc_unwind_ip) \ 851 } \ 852 . = ALIGN(2); \ 853 .orc_unwind : AT(ADDR(.orc_unwind) - LOAD_OFFSET) { \ 854 BOUNDED_SECTION_BY(.orc_unwind, _orc_unwind) \ 855 } \ 856 text_size = _etext - _stext; \ 857 . = ALIGN(4); \ 858 .orc_lookup : AT(ADDR(.orc_lookup) - LOAD_OFFSET) { \ 859 orc_lookup = .; \ 860 . += (((text_size + LOOKUP_BLOCK_SIZE - 1) / \ 861 LOOKUP_BLOCK_SIZE) + 1) * 4; \ 862 orc_lookup_end = .; \ 863 } 864 #else 865 #define ORC_UNWIND_TABLE 866 #endif 867 868 /* Built-in firmware blobs */ 869 #ifdef CONFIG_FW_LOADER 870 #define FW_LOADER_BUILT_IN_DATA \ 871 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) ALIGN(8) { \ 872 BOUNDED_SECTION_PRE_LABEL(.builtin_fw, _builtin_fw, __start, __end) \ 873 } 874 #else 875 #define FW_LOADER_BUILT_IN_DATA 876 #endif 877 878 #ifdef CONFIG_PM_TRACE 879 #define TRACEDATA \ 880 . = ALIGN(4); \ 881 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \ 882 BOUNDED_SECTION_POST_LABEL(.tracedata, __tracedata, _start, _end) \ 883 } 884 #else 885 #define TRACEDATA 886 #endif 887 888 #ifdef CONFIG_PRINTK_INDEX 889 #define PRINTK_INDEX \ 890 .printk_index : AT(ADDR(.printk_index) - LOAD_OFFSET) { \ 891 BOUNDED_SECTION_BY(.printk_index, _printk_index) \ 892 } 893 #else 894 #define PRINTK_INDEX 895 #endif 896 897 /* 898 * Discard .note.GNU-stack, which is emitted as PROGBITS by the compiler. 899 * Otherwise, the type of .notes section would become PROGBITS instead of NOTES. 900 * 901 * Also, discard .note.gnu.property, otherwise it forces the notes section to 902 * be 8-byte aligned which causes alignment mismatches with the kernel's custom 903 * 4-byte aligned notes. 904 */ 905 #define NOTES \ 906 /DISCARD/ : { \ 907 *(.note.GNU-stack) \ 908 *(.note.gnu.property) \ 909 } \ 910 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \ 911 BOUNDED_SECTION_BY(.note.*, _notes) \ 912 } NOTES_HEADERS \ 913 NOTES_HEADERS_RESTORE 914 915 #define INIT_SETUP(initsetup_align) \ 916 . = ALIGN(initsetup_align); \ 917 BOUNDED_SECTION_POST_LABEL(.init.setup, __setup, _start, _end) 918 919 #define INIT_CALLS_LEVEL(level) \ 920 __initcall##level##_start = .; \ 921 KEEP(*(.initcall##level##.init)) \ 922 KEEP(*(.initcall##level##s.init)) \ 923 924 #define INIT_CALLS \ 925 __initcall_start = .; \ 926 KEEP(*(.initcallearly.init)) \ 927 INIT_CALLS_LEVEL(0) \ 928 INIT_CALLS_LEVEL(1) \ 929 INIT_CALLS_LEVEL(2) \ 930 INIT_CALLS_LEVEL(3) \ 931 INIT_CALLS_LEVEL(4) \ 932 INIT_CALLS_LEVEL(5) \ 933 INIT_CALLS_LEVEL(rootfs) \ 934 INIT_CALLS_LEVEL(6) \ 935 INIT_CALLS_LEVEL(7) \ 936 __initcall_end = .; 937 938 #define CON_INITCALL \ 939 BOUNDED_SECTION_POST_LABEL(.con_initcall.init, __con_initcall, _start, _end) 940 941 #define NAMED_SECTION(name) \ 942 . = ALIGN(8); \ 943 name : AT(ADDR(name) - LOAD_OFFSET) \ 944 { BOUNDED_SECTION_PRE_LABEL(name, name, __start_, __stop_) } 945 946 #define RUNTIME_CONST(t,x) NAMED_SECTION(runtime_##t##_##x) 947 948 #define RUNTIME_CONST_VARIABLES \ 949 RUNTIME_CONST(shift, d_hash_shift) \ 950 RUNTIME_CONST(ptr, dentry_hashtable) 951 952 /* Alignment must be consistent with (kunit_suite *) in include/kunit/test.h */ 953 #define KUNIT_TABLE() \ 954 . = ALIGN(8); \ 955 BOUNDED_SECTION_POST_LABEL(.kunit_test_suites, __kunit_suites, _start, _end) 956 957 /* Alignment must be consistent with (kunit_suite *) in include/kunit/test.h */ 958 #define KUNIT_INIT_TABLE() \ 959 . = ALIGN(8); \ 960 BOUNDED_SECTION_POST_LABEL(.kunit_init_test_suites, \ 961 __kunit_init_suites, _start, _end) 962 963 #ifdef CONFIG_BLK_DEV_INITRD 964 #define INIT_RAM_FS \ 965 . = ALIGN(4); \ 966 __initramfs_start = .; \ 967 KEEP(*(.init.ramfs)) \ 968 . = ALIGN(8); \ 969 KEEP(*(.init.ramfs.info)) 970 #else 971 #define INIT_RAM_FS 972 #endif 973 974 /* 975 * Memory encryption operates on a page basis. Since we need to clear 976 * the memory encryption mask for this section, it needs to be aligned 977 * on a page boundary and be a page-size multiple in length. 978 * 979 * Note: We use a separate section so that only this section gets 980 * decrypted to avoid exposing more than we wish. 981 */ 982 #ifdef CONFIG_AMD_MEM_ENCRYPT 983 #define PERCPU_DECRYPTED_SECTION \ 984 . = ALIGN(PAGE_SIZE); \ 985 *(.data..percpu..decrypted) \ 986 . = ALIGN(PAGE_SIZE); 987 #else 988 #define PERCPU_DECRYPTED_SECTION 989 #endif 990 991 992 /* 993 * Default discarded sections. 994 * 995 * Some archs want to discard exit text/data at runtime rather than 996 * link time due to cross-section references such as alt instructions, 997 * bug table, eh_frame, etc. DISCARDS must be the last of output 998 * section definitions so that such archs put those in earlier section 999 * definitions. 1000 */ 1001 #ifdef RUNTIME_DISCARD_EXIT 1002 #define EXIT_DISCARDS 1003 #else 1004 #define EXIT_DISCARDS \ 1005 EXIT_TEXT \ 1006 EXIT_DATA 1007 #endif 1008 1009 /* 1010 * Clang's -fprofile-arcs, -fsanitize=kernel-address, and 1011 * -fsanitize=thread produce unwanted sections (.eh_frame 1012 * and .init_array.*), but CONFIG_CONSTRUCTORS wants to 1013 * keep any .init_array.* sections. 1014 * https://llvm.org/pr46478 1015 */ 1016 #ifdef CONFIG_UNWIND_TABLES 1017 #define DISCARD_EH_FRAME 1018 #else 1019 #define DISCARD_EH_FRAME *(.eh_frame) 1020 #endif 1021 #if defined(CONFIG_GCOV_KERNEL) || defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KCSAN) 1022 # ifdef CONFIG_CONSTRUCTORS 1023 # define SANITIZER_DISCARDS \ 1024 DISCARD_EH_FRAME 1025 # else 1026 # define SANITIZER_DISCARDS \ 1027 *(.init_array) *(.init_array.*) \ 1028 DISCARD_EH_FRAME 1029 # endif 1030 #else 1031 # define SANITIZER_DISCARDS 1032 #endif 1033 1034 #define COMMON_DISCARDS \ 1035 SANITIZER_DISCARDS \ 1036 PATCHABLE_DISCARDS \ 1037 *(.discard) \ 1038 *(.discard.*) \ 1039 *(.export_symbol) \ 1040 *(.no_trim_symbol) \ 1041 *(.modinfo) \ 1042 /* ld.bfd warns about .gnu.version* even when not emitted */ \ 1043 *(.gnu.version*) \ 1044 1045 #define DISCARDS \ 1046 /DISCARD/ : { \ 1047 EXIT_DISCARDS \ 1048 EXIT_CALL \ 1049 COMMON_DISCARDS \ 1050 } 1051 1052 /** 1053 * PERCPU_INPUT - the percpu input sections 1054 * @cacheline: cacheline size 1055 * 1056 * The core percpu section names and core symbols which do not rely 1057 * directly upon load addresses. 1058 * 1059 * @cacheline is used to align subsections to avoid false cacheline 1060 * sharing between subsections for different purposes. 1061 */ 1062 #define PERCPU_INPUT(cacheline) \ 1063 __per_cpu_start = .; \ 1064 *(.data..percpu..first) \ 1065 . = ALIGN(PAGE_SIZE); \ 1066 *(.data..percpu..page_aligned) \ 1067 . = ALIGN(cacheline); \ 1068 *(.data..percpu..read_mostly) \ 1069 . = ALIGN(cacheline); \ 1070 *(.data..percpu) \ 1071 *(.data..percpu..shared_aligned) \ 1072 PERCPU_DECRYPTED_SECTION \ 1073 __per_cpu_end = .; 1074 1075 /** 1076 * PERCPU_VADDR - define output section for percpu area 1077 * @cacheline: cacheline size 1078 * @vaddr: explicit base address (optional) 1079 * @phdr: destination PHDR (optional) 1080 * 1081 * Macro which expands to output section for percpu area. 1082 * 1083 * @cacheline is used to align subsections to avoid false cacheline 1084 * sharing between subsections for different purposes. 1085 * 1086 * If @vaddr is not blank, it specifies explicit base address and all 1087 * percpu symbols will be offset from the given address. If blank, 1088 * @vaddr always equals @laddr + LOAD_OFFSET. 1089 * 1090 * @phdr defines the output PHDR to use if not blank. Be warned that 1091 * output PHDR is sticky. If @phdr is specified, the next output 1092 * section in the linker script will go there too. @phdr should have 1093 * a leading colon. 1094 * 1095 * Note that this macros defines __per_cpu_load as an absolute symbol. 1096 * If there is no need to put the percpu section at a predetermined 1097 * address, use PERCPU_SECTION. 1098 */ 1099 #define PERCPU_VADDR(cacheline, vaddr, phdr) \ 1100 __per_cpu_load = .; \ 1101 .data..percpu vaddr : AT(__per_cpu_load - LOAD_OFFSET) { \ 1102 PERCPU_INPUT(cacheline) \ 1103 } phdr \ 1104 . = __per_cpu_load + SIZEOF(.data..percpu); 1105 1106 /** 1107 * PERCPU_SECTION - define output section for percpu area, simple version 1108 * @cacheline: cacheline size 1109 * 1110 * Align to PAGE_SIZE and outputs output section for percpu area. This 1111 * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and 1112 * __per_cpu_start will be identical. 1113 * 1114 * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,) 1115 * except that __per_cpu_load is defined as a relative symbol against 1116 * .data..percpu which is required for relocatable x86_32 configuration. 1117 */ 1118 #define PERCPU_SECTION(cacheline) \ 1119 . = ALIGN(PAGE_SIZE); \ 1120 .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \ 1121 __per_cpu_load = .; \ 1122 PERCPU_INPUT(cacheline) \ 1123 } 1124 1125 1126 /* 1127 * Definition of the high level *_SECTION macros 1128 * They will fit only a subset of the architectures 1129 */ 1130 1131 1132 /* 1133 * Writeable data. 1134 * All sections are combined in a single .data section. 1135 * The sections following CONSTRUCTORS are arranged so their 1136 * typical alignment matches. 1137 * A cacheline is typical/always less than a PAGE_SIZE so 1138 * the sections that has this restriction (or similar) 1139 * is located before the ones requiring PAGE_SIZE alignment. 1140 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which 1141 * matches the requirement of PAGE_ALIGNED_DATA. 1142 * 1143 * use 0 as page_align if page_aligned data is not used */ 1144 #define RW_DATA(cacheline, pagealigned, inittask) \ 1145 . = ALIGN(PAGE_SIZE); \ 1146 .data : AT(ADDR(.data) - LOAD_OFFSET) { \ 1147 INIT_TASK_DATA(inittask) \ 1148 NOSAVE_DATA \ 1149 PAGE_ALIGNED_DATA(pagealigned) \ 1150 CACHELINE_ALIGNED_DATA(cacheline) \ 1151 READ_MOSTLY_DATA(cacheline) \ 1152 DATA_DATA \ 1153 CONSTRUCTORS \ 1154 } \ 1155 BUG_TABLE \ 1156 1157 #define INIT_TEXT_SECTION(inittext_align) \ 1158 . = ALIGN(inittext_align); \ 1159 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \ 1160 _sinittext = .; \ 1161 INIT_TEXT \ 1162 _einittext = .; \ 1163 } 1164 1165 #define INIT_DATA_SECTION(initsetup_align) \ 1166 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \ 1167 INIT_DATA \ 1168 INIT_SETUP(initsetup_align) \ 1169 INIT_CALLS \ 1170 CON_INITCALL \ 1171 INIT_RAM_FS \ 1172 } 1173 1174 #define BSS_SECTION(sbss_align, bss_align, stop_align) \ 1175 . = ALIGN(sbss_align); \ 1176 __bss_start = .; \ 1177 SBSS(sbss_align) \ 1178 BSS(bss_align) \ 1179 . = ALIGN(stop_align); \ 1180 __bss_stop = .; 1181