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_task)) \ 408 KEEP(*(.data..init_thread_info)) \ 409 . = __start_init_stack + THREAD_SIZE; \ 410 __end_init_stack = .; 411 412 #define JUMP_TABLE_DATA \ 413 . = ALIGN(8); \ 414 BOUNDED_SECTION_BY(__jump_table, ___jump_table) 415 416 #ifdef CONFIG_HAVE_STATIC_CALL_INLINE 417 #define STATIC_CALL_DATA \ 418 . = ALIGN(8); \ 419 BOUNDED_SECTION_BY(.static_call_sites, _static_call_sites) \ 420 BOUNDED_SECTION_BY(.static_call_tramp_key, _static_call_tramp_key) 421 #else 422 #define STATIC_CALL_DATA 423 #endif 424 425 /* 426 * Allow architectures to handle ro_after_init data on their 427 * own by defining an empty RO_AFTER_INIT_DATA. 428 */ 429 #ifndef RO_AFTER_INIT_DATA 430 #define RO_AFTER_INIT_DATA \ 431 . = ALIGN(8); \ 432 __start_ro_after_init = .; \ 433 *(.data..ro_after_init) \ 434 JUMP_TABLE_DATA \ 435 STATIC_CALL_DATA \ 436 __end_ro_after_init = .; 437 #endif 438 439 /* 440 * .kcfi_traps contains a list KCFI trap locations. 441 */ 442 #ifndef KCFI_TRAPS 443 #ifdef CONFIG_ARCH_USES_CFI_TRAPS 444 #define KCFI_TRAPS \ 445 __kcfi_traps : AT(ADDR(__kcfi_traps) - LOAD_OFFSET) { \ 446 BOUNDED_SECTION_BY(.kcfi_traps, ___kcfi_traps) \ 447 } 448 #else 449 #define KCFI_TRAPS 450 #endif 451 #endif 452 453 /* 454 * Read only Data 455 */ 456 #define RO_DATA(align) \ 457 . = ALIGN((align)); \ 458 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \ 459 __start_rodata = .; \ 460 *(.rodata) *(.rodata.*) \ 461 SCHED_DATA \ 462 RO_AFTER_INIT_DATA /* Read only after init */ \ 463 . = ALIGN(8); \ 464 BOUNDED_SECTION_BY(__tracepoints_ptrs, ___tracepoints_ptrs) \ 465 *(__tracepoints_strings)/* Tracepoints: strings */ \ 466 } \ 467 \ 468 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \ 469 *(.rodata1) \ 470 } \ 471 \ 472 /* PCI quirks */ \ 473 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \ 474 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_early, _pci_fixups_early, __start, __end) \ 475 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_header, _pci_fixups_header, __start, __end) \ 476 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_final, _pci_fixups_final, __start, __end) \ 477 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_enable, _pci_fixups_enable, __start, __end) \ 478 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_resume, _pci_fixups_resume, __start, __end) \ 479 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_suspend, _pci_fixups_suspend, __start, __end) \ 480 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_resume_early, _pci_fixups_resume_early, __start, __end) \ 481 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_suspend_late, _pci_fixups_suspend_late, __start, __end) \ 482 } \ 483 \ 484 FW_LOADER_BUILT_IN_DATA \ 485 TRACEDATA \ 486 \ 487 PRINTK_INDEX \ 488 \ 489 /* Kernel symbol table: Normal symbols */ \ 490 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \ 491 __start___ksymtab = .; \ 492 KEEP(*(SORT(___ksymtab+*))) \ 493 __stop___ksymtab = .; \ 494 } \ 495 \ 496 /* Kernel symbol table: GPL-only symbols */ \ 497 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \ 498 __start___ksymtab_gpl = .; \ 499 KEEP(*(SORT(___ksymtab_gpl+*))) \ 500 __stop___ksymtab_gpl = .; \ 501 } \ 502 \ 503 /* Kernel symbol table: Normal symbols */ \ 504 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \ 505 __start___kcrctab = .; \ 506 KEEP(*(SORT(___kcrctab+*))) \ 507 __stop___kcrctab = .; \ 508 } \ 509 \ 510 /* Kernel symbol table: GPL-only symbols */ \ 511 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \ 512 __start___kcrctab_gpl = .; \ 513 KEEP(*(SORT(___kcrctab_gpl+*))) \ 514 __stop___kcrctab_gpl = .; \ 515 } \ 516 \ 517 /* Kernel symbol table: strings */ \ 518 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \ 519 *(__ksymtab_strings) \ 520 } \ 521 \ 522 /* __*init sections */ \ 523 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \ 524 *(.ref.rodata) \ 525 } \ 526 \ 527 /* Built-in module parameters. */ \ 528 __param : AT(ADDR(__param) - LOAD_OFFSET) { \ 529 BOUNDED_SECTION_BY(__param, ___param) \ 530 } \ 531 \ 532 /* Built-in module versions. */ \ 533 __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \ 534 BOUNDED_SECTION_BY(__modver, ___modver) \ 535 } \ 536 \ 537 KCFI_TRAPS \ 538 \ 539 RO_EXCEPTION_TABLE \ 540 NOTES \ 541 BTF \ 542 \ 543 . = ALIGN((align)); \ 544 __end_rodata = .; 545 546 547 /* 548 * Non-instrumentable text section 549 */ 550 #define NOINSTR_TEXT \ 551 ALIGN_FUNCTION(); \ 552 __noinstr_text_start = .; \ 553 *(.noinstr.text) \ 554 __cpuidle_text_start = .; \ 555 *(.cpuidle.text) \ 556 __cpuidle_text_end = .; \ 557 __noinstr_text_end = .; 558 559 #define TEXT_SPLIT \ 560 __split_text_start = .; \ 561 *(.text.split .text.split.[0-9a-zA-Z_]*) \ 562 __split_text_end = .; 563 564 #define TEXT_UNLIKELY \ 565 __unlikely_text_start = .; \ 566 *(.text.unlikely .text.unlikely.*) \ 567 __unlikely_text_end = .; 568 569 #define TEXT_HOT \ 570 __hot_text_start = .; \ 571 *(.text.hot .text.hot.*) \ 572 __hot_text_end = .; 573 574 /* 575 * .text section. Map to function alignment to avoid address changes 576 * during second ld run in second ld pass when generating System.map 577 * 578 * TEXT_MAIN here will match symbols with a fixed pattern (for example, 579 * .text.hot or .text.unlikely) if dead code elimination or 580 * function-section is enabled. Match these symbols first before 581 * TEXT_MAIN to ensure they are grouped together. 582 * 583 * Also placing .text.hot section at the beginning of a page, this 584 * would help the TLB performance. 585 */ 586 #define TEXT_TEXT \ 587 ALIGN_FUNCTION(); \ 588 *(.text.asan.* .text.tsan.*) \ 589 *(.text.unknown .text.unknown.*) \ 590 TEXT_SPLIT \ 591 TEXT_UNLIKELY \ 592 . = ALIGN(PAGE_SIZE); \ 593 TEXT_HOT \ 594 *(TEXT_MAIN .text.fixup) \ 595 NOINSTR_TEXT \ 596 *(.ref.text) 597 598 /* sched.text is aling to function alignment to secure we have same 599 * address even at second ld pass when generating System.map */ 600 #define SCHED_TEXT \ 601 ALIGN_FUNCTION(); \ 602 __sched_text_start = .; \ 603 *(.sched.text) \ 604 __sched_text_end = .; 605 606 /* spinlock.text is aling to function alignment to secure we have same 607 * address even at second ld pass when generating System.map */ 608 #define LOCK_TEXT \ 609 ALIGN_FUNCTION(); \ 610 __lock_text_start = .; \ 611 *(.spinlock.text) \ 612 __lock_text_end = .; 613 614 #define KPROBES_TEXT \ 615 ALIGN_FUNCTION(); \ 616 __kprobes_text_start = .; \ 617 *(.kprobes.text) \ 618 __kprobes_text_end = .; 619 620 #define ENTRY_TEXT \ 621 ALIGN_FUNCTION(); \ 622 __entry_text_start = .; \ 623 *(.entry.text) \ 624 __entry_text_end = .; 625 626 #define IRQENTRY_TEXT \ 627 ALIGN_FUNCTION(); \ 628 __irqentry_text_start = .; \ 629 *(.irqentry.text) \ 630 __irqentry_text_end = .; 631 632 #define SOFTIRQENTRY_TEXT \ 633 ALIGN_FUNCTION(); \ 634 __softirqentry_text_start = .; \ 635 *(.softirqentry.text) \ 636 __softirqentry_text_end = .; 637 638 #define STATIC_CALL_TEXT \ 639 ALIGN_FUNCTION(); \ 640 __static_call_text_start = .; \ 641 *(.static_call.text) \ 642 __static_call_text_end = .; 643 644 /* Section used for early init (in .S files) */ 645 #define HEAD_TEXT KEEP(*(.head.text)) 646 647 #define HEAD_TEXT_SECTION \ 648 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \ 649 HEAD_TEXT \ 650 } 651 652 /* 653 * Exception table 654 */ 655 #define EXCEPTION_TABLE(align) \ 656 . = ALIGN(align); \ 657 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \ 658 BOUNDED_SECTION_BY(__ex_table, ___ex_table) \ 659 } 660 661 /* 662 * .BTF 663 */ 664 #ifdef CONFIG_DEBUG_INFO_BTF 665 #define BTF \ 666 .BTF : AT(ADDR(.BTF) - LOAD_OFFSET) { \ 667 BOUNDED_SECTION_BY(.BTF, _BTF) \ 668 } \ 669 . = ALIGN(4); \ 670 .BTF_ids : AT(ADDR(.BTF_ids) - LOAD_OFFSET) { \ 671 *(.BTF_ids) \ 672 } 673 #else 674 #define BTF 675 #endif 676 677 /* 678 * Init task 679 */ 680 #define INIT_TASK_DATA_SECTION(align) \ 681 . = ALIGN(align); \ 682 .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \ 683 INIT_TASK_DATA(align) \ 684 } 685 686 #ifdef CONFIG_CONSTRUCTORS 687 #define KERNEL_CTORS() . = ALIGN(8); \ 688 __ctors_start = .; \ 689 KEEP(*(SORT(.ctors.*))) \ 690 KEEP(*(.ctors)) \ 691 KEEP(*(SORT(.init_array.*))) \ 692 KEEP(*(.init_array)) \ 693 __ctors_end = .; 694 #else 695 #define KERNEL_CTORS() 696 #endif 697 698 /* init and exit section handling */ 699 #define INIT_DATA \ 700 KEEP(*(SORT(___kentry+*))) \ 701 *(.init.data .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 CLK_OF_TABLES() \ 710 RESERVEDMEM_OF_TABLES() \ 711 TIMER_OF_TABLES() \ 712 CPU_METHOD_OF_TABLES() \ 713 CPUIDLE_METHOD_OF_TABLES() \ 714 KERNEL_DTB() \ 715 IRQCHIP_OF_MATCH_TABLE() \ 716 ACPI_PROBE_TABLE(irqchip) \ 717 ACPI_PROBE_TABLE(timer) \ 718 THERMAL_TABLE(governor) \ 719 EARLYCON_TABLE() \ 720 LSM_TABLE() \ 721 EARLY_LSM_TABLE() \ 722 KUNIT_INIT_TABLE() 723 724 #define INIT_TEXT \ 725 *(.init.text .init.text.*) \ 726 *(.text.startup) 727 728 #define EXIT_DATA \ 729 *(.exit.data .exit.data.*) \ 730 *(.fini_array .fini_array.*) \ 731 *(.dtors .dtors.*) \ 732 733 #define EXIT_TEXT \ 734 *(.exit.text) \ 735 *(.text.exit) \ 736 737 #define EXIT_CALL \ 738 *(.exitcall.exit) 739 740 /* 741 * bss (Block Started by Symbol) - uninitialized data 742 * zeroed during startup 743 */ 744 #define SBSS(sbss_align) \ 745 . = ALIGN(sbss_align); \ 746 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \ 747 *(.dynsbss) \ 748 *(SBSS_MAIN) \ 749 *(.scommon) \ 750 } 751 752 /* 753 * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra 754 * sections to the front of bss. 755 */ 756 #ifndef BSS_FIRST_SECTIONS 757 #define BSS_FIRST_SECTIONS 758 #endif 759 760 #define BSS(bss_align) \ 761 . = ALIGN(bss_align); \ 762 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \ 763 BSS_FIRST_SECTIONS \ 764 . = ALIGN(PAGE_SIZE); \ 765 *(.bss..page_aligned) \ 766 . = ALIGN(PAGE_SIZE); \ 767 *(.dynbss) \ 768 *(BSS_MAIN) \ 769 *(COMMON) \ 770 } 771 772 /* 773 * DWARF debug sections. 774 * Symbols in the DWARF debugging sections are relative to 775 * the beginning of the section so we begin them at 0. 776 */ 777 #define DWARF_DEBUG \ 778 /* DWARF 1 */ \ 779 .debug 0 : { *(.debug) } \ 780 .line 0 : { *(.line) } \ 781 /* GNU DWARF 1 extensions */ \ 782 .debug_srcinfo 0 : { *(.debug_srcinfo) } \ 783 .debug_sfnames 0 : { *(.debug_sfnames) } \ 784 /* DWARF 1.1 and DWARF 2 */ \ 785 .debug_aranges 0 : { *(.debug_aranges) } \ 786 .debug_pubnames 0 : { *(.debug_pubnames) } \ 787 /* DWARF 2 */ \ 788 .debug_info 0 : { *(.debug_info \ 789 .gnu.linkonce.wi.*) } \ 790 .debug_abbrev 0 : { *(.debug_abbrev) } \ 791 .debug_line 0 : { *(.debug_line) } \ 792 .debug_frame 0 : { *(.debug_frame) } \ 793 .debug_str 0 : { *(.debug_str) } \ 794 .debug_loc 0 : { *(.debug_loc) } \ 795 .debug_macinfo 0 : { *(.debug_macinfo) } \ 796 .debug_pubtypes 0 : { *(.debug_pubtypes) } \ 797 /* DWARF 3 */ \ 798 .debug_ranges 0 : { *(.debug_ranges) } \ 799 /* SGI/MIPS DWARF 2 extensions */ \ 800 .debug_weaknames 0 : { *(.debug_weaknames) } \ 801 .debug_funcnames 0 : { *(.debug_funcnames) } \ 802 .debug_typenames 0 : { *(.debug_typenames) } \ 803 .debug_varnames 0 : { *(.debug_varnames) } \ 804 /* GNU DWARF 2 extensions */ \ 805 .debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) } \ 806 .debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) } \ 807 /* DWARF 4 */ \ 808 .debug_types 0 : { *(.debug_types) } \ 809 /* DWARF 5 */ \ 810 .debug_addr 0 : { *(.debug_addr) } \ 811 .debug_line_str 0 : { *(.debug_line_str) } \ 812 .debug_loclists 0 : { *(.debug_loclists) } \ 813 .debug_macro 0 : { *(.debug_macro) } \ 814 .debug_names 0 : { *(.debug_names) } \ 815 .debug_rnglists 0 : { *(.debug_rnglists) } \ 816 .debug_str_offsets 0 : { *(.debug_str_offsets) } 817 818 /* Stabs debugging sections. */ 819 #define STABS_DEBUG \ 820 .stab 0 : { *(.stab) } \ 821 .stabstr 0 : { *(.stabstr) } \ 822 .stab.excl 0 : { *(.stab.excl) } \ 823 .stab.exclstr 0 : { *(.stab.exclstr) } \ 824 .stab.index 0 : { *(.stab.index) } \ 825 .stab.indexstr 0 : { *(.stab.indexstr) } 826 827 /* Required sections not related to debugging. */ 828 #define ELF_DETAILS \ 829 .comment 0 : { *(.comment) } \ 830 .symtab 0 : { *(.symtab) } \ 831 .strtab 0 : { *(.strtab) } \ 832 .shstrtab 0 : { *(.shstrtab) } 833 834 #ifdef CONFIG_GENERIC_BUG 835 #define BUG_TABLE \ 836 . = ALIGN(8); \ 837 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \ 838 BOUNDED_SECTION_BY(__bug_table, ___bug_table) \ 839 } 840 #else 841 #define BUG_TABLE 842 #endif 843 844 #ifdef CONFIG_UNWINDER_ORC 845 #define ORC_UNWIND_TABLE \ 846 .orc_header : AT(ADDR(.orc_header) - LOAD_OFFSET) { \ 847 BOUNDED_SECTION_BY(.orc_header, _orc_header) \ 848 } \ 849 . = ALIGN(4); \ 850 .orc_unwind_ip : AT(ADDR(.orc_unwind_ip) - LOAD_OFFSET) { \ 851 BOUNDED_SECTION_BY(.orc_unwind_ip, _orc_unwind_ip) \ 852 } \ 853 . = ALIGN(2); \ 854 .orc_unwind : AT(ADDR(.orc_unwind) - LOAD_OFFSET) { \ 855 BOUNDED_SECTION_BY(.orc_unwind, _orc_unwind) \ 856 } \ 857 text_size = _etext - _stext; \ 858 . = ALIGN(4); \ 859 .orc_lookup : AT(ADDR(.orc_lookup) - LOAD_OFFSET) { \ 860 orc_lookup = .; \ 861 . += (((text_size + LOOKUP_BLOCK_SIZE - 1) / \ 862 LOOKUP_BLOCK_SIZE) + 1) * 4; \ 863 orc_lookup_end = .; \ 864 } 865 #else 866 #define ORC_UNWIND_TABLE 867 #endif 868 869 /* Built-in firmware blobs */ 870 #ifdef CONFIG_FW_LOADER 871 #define FW_LOADER_BUILT_IN_DATA \ 872 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) ALIGN(8) { \ 873 BOUNDED_SECTION_PRE_LABEL(.builtin_fw, _builtin_fw, __start, __end) \ 874 } 875 #else 876 #define FW_LOADER_BUILT_IN_DATA 877 #endif 878 879 #ifdef CONFIG_PM_TRACE 880 #define TRACEDATA \ 881 . = ALIGN(4); \ 882 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \ 883 BOUNDED_SECTION_POST_LABEL(.tracedata, __tracedata, _start, _end) \ 884 } 885 #else 886 #define TRACEDATA 887 #endif 888 889 #ifdef CONFIG_PRINTK_INDEX 890 #define PRINTK_INDEX \ 891 .printk_index : AT(ADDR(.printk_index) - LOAD_OFFSET) { \ 892 BOUNDED_SECTION_BY(.printk_index, _printk_index) \ 893 } 894 #else 895 #define PRINTK_INDEX 896 #endif 897 898 /* 899 * Discard .note.GNU-stack, which is emitted as PROGBITS by the compiler. 900 * Otherwise, the type of .notes section would become PROGBITS instead of NOTES. 901 * 902 * Also, discard .note.gnu.property, otherwise it forces the notes section to 903 * be 8-byte aligned which causes alignment mismatches with the kernel's custom 904 * 4-byte aligned notes. 905 */ 906 #define NOTES \ 907 /DISCARD/ : { \ 908 *(.note.GNU-stack) \ 909 *(.note.gnu.property) \ 910 } \ 911 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \ 912 BOUNDED_SECTION_BY(.note.*, _notes) \ 913 } NOTES_HEADERS \ 914 NOTES_HEADERS_RESTORE 915 916 #define INIT_SETUP(initsetup_align) \ 917 . = ALIGN(initsetup_align); \ 918 BOUNDED_SECTION_POST_LABEL(.init.setup, __setup, _start, _end) 919 920 #define INIT_CALLS_LEVEL(level) \ 921 __initcall##level##_start = .; \ 922 KEEP(*(.initcall##level##.init)) \ 923 KEEP(*(.initcall##level##s.init)) \ 924 925 #define INIT_CALLS \ 926 __initcall_start = .; \ 927 KEEP(*(.initcallearly.init)) \ 928 INIT_CALLS_LEVEL(0) \ 929 INIT_CALLS_LEVEL(1) \ 930 INIT_CALLS_LEVEL(2) \ 931 INIT_CALLS_LEVEL(3) \ 932 INIT_CALLS_LEVEL(4) \ 933 INIT_CALLS_LEVEL(5) \ 934 INIT_CALLS_LEVEL(rootfs) \ 935 INIT_CALLS_LEVEL(6) \ 936 INIT_CALLS_LEVEL(7) \ 937 __initcall_end = .; 938 939 #define CON_INITCALL \ 940 BOUNDED_SECTION_POST_LABEL(.con_initcall.init, __con_initcall, _start, _end) 941 942 #define NAMED_SECTION(name) \ 943 . = ALIGN(8); \ 944 name : AT(ADDR(name) - LOAD_OFFSET) \ 945 { BOUNDED_SECTION_PRE_LABEL(name, name, __start_, __stop_) } 946 947 #define RUNTIME_CONST(t,x) NAMED_SECTION(runtime_##t##_##x) 948 949 #define RUNTIME_CONST_VARIABLES \ 950 RUNTIME_CONST(shift, d_hash_shift) \ 951 RUNTIME_CONST(ptr, dentry_hashtable) 952 953 /* Alignment must be consistent with (kunit_suite *) in include/kunit/test.h */ 954 #define KUNIT_TABLE() \ 955 . = ALIGN(8); \ 956 BOUNDED_SECTION_POST_LABEL(.kunit_test_suites, __kunit_suites, _start, _end) 957 958 /* Alignment must be consistent with (kunit_suite *) in include/kunit/test.h */ 959 #define KUNIT_INIT_TABLE() \ 960 . = ALIGN(8); \ 961 BOUNDED_SECTION_POST_LABEL(.kunit_init_test_suites, \ 962 __kunit_init_suites, _start, _end) 963 964 #ifdef CONFIG_BLK_DEV_INITRD 965 #define INIT_RAM_FS \ 966 . = ALIGN(4); \ 967 __initramfs_start = .; \ 968 KEEP(*(.init.ramfs)) \ 969 . = ALIGN(8); \ 970 KEEP(*(.init.ramfs.info)) 971 #else 972 #define INIT_RAM_FS 973 #endif 974 975 /* 976 * Memory encryption operates on a page basis. Since we need to clear 977 * the memory encryption mask for this section, it needs to be aligned 978 * on a page boundary and be a page-size multiple in length. 979 * 980 * Note: We use a separate section so that only this section gets 981 * decrypted to avoid exposing more than we wish. 982 */ 983 #ifdef CONFIG_AMD_MEM_ENCRYPT 984 #define PERCPU_DECRYPTED_SECTION \ 985 . = ALIGN(PAGE_SIZE); \ 986 *(.data..percpu..decrypted) \ 987 . = ALIGN(PAGE_SIZE); 988 #else 989 #define PERCPU_DECRYPTED_SECTION 990 #endif 991 992 993 /* 994 * Default discarded sections. 995 * 996 * Some archs want to discard exit text/data at runtime rather than 997 * link time due to cross-section references such as alt instructions, 998 * bug table, eh_frame, etc. DISCARDS must be the last of output 999 * section definitions so that such archs put those in earlier section 1000 * definitions. 1001 */ 1002 #ifdef RUNTIME_DISCARD_EXIT 1003 #define EXIT_DISCARDS 1004 #else 1005 #define EXIT_DISCARDS \ 1006 EXIT_TEXT \ 1007 EXIT_DATA 1008 #endif 1009 1010 /* 1011 * Clang's -fprofile-arcs, -fsanitize=kernel-address, and 1012 * -fsanitize=thread produce unwanted sections (.eh_frame 1013 * and .init_array.*), but CONFIG_CONSTRUCTORS wants to 1014 * keep any .init_array.* sections. 1015 * https://llvm.org/pr46478 1016 */ 1017 #ifdef CONFIG_UNWIND_TABLES 1018 #define DISCARD_EH_FRAME 1019 #else 1020 #define DISCARD_EH_FRAME *(.eh_frame) 1021 #endif 1022 #if defined(CONFIG_GCOV_KERNEL) || defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KCSAN) 1023 # ifdef CONFIG_CONSTRUCTORS 1024 # define SANITIZER_DISCARDS \ 1025 DISCARD_EH_FRAME 1026 # else 1027 # define SANITIZER_DISCARDS \ 1028 *(.init_array) *(.init_array.*) \ 1029 DISCARD_EH_FRAME 1030 # endif 1031 #else 1032 # define SANITIZER_DISCARDS 1033 #endif 1034 1035 #define COMMON_DISCARDS \ 1036 SANITIZER_DISCARDS \ 1037 PATCHABLE_DISCARDS \ 1038 *(.discard) \ 1039 *(.discard.*) \ 1040 *(.export_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