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_SECTION(PAGE_SIZE) 27 * RW_DATA_SECTION(...) 28 * _edata = .; 29 * 30 * EXCEPTION_TABLE(...) 31 * NOTES 32 * 33 * BSS_SECTION(0, 0, 0) 34 * _end = .; 35 * 36 * STABS_DEBUG 37 * DWARF_DEBUG 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 #include <linux/export.h> 58 59 /* Align . to a 8 byte boundary equals to maximum function alignment. */ 60 #define ALIGN_FUNCTION() . = ALIGN(8) 61 62 /* 63 * LD_DEAD_CODE_DATA_ELIMINATION option enables -fdata-sections, which 64 * generates .data.identifier sections, which need to be pulled in with 65 * .data. We don't want to pull in .data..other sections, which Linux 66 * has defined. Same for text and bss. 67 * 68 * RODATA_MAIN is not used because existing code already defines .rodata.x 69 * sections to be brought in with rodata. 70 */ 71 #ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 72 #define TEXT_MAIN .text .text.[0-9a-zA-Z_]* 73 #define DATA_MAIN .data .data.[0-9a-zA-Z_]* 74 #define SDATA_MAIN .sdata .sdata.[0-9a-zA-Z_]* 75 #define RODATA_MAIN .rodata .rodata.[0-9a-zA-Z_]* 76 #define BSS_MAIN .bss .bss.[0-9a-zA-Z_]* 77 #define SBSS_MAIN .sbss .sbss.[0-9a-zA-Z_]* 78 #else 79 #define TEXT_MAIN .text 80 #define DATA_MAIN .data 81 #define SDATA_MAIN .sdata 82 #define RODATA_MAIN .rodata 83 #define BSS_MAIN .bss 84 #define SBSS_MAIN .sbss 85 #endif 86 87 /* 88 * Align to a 32 byte boundary equal to the 89 * alignment gcc 4.5 uses for a struct 90 */ 91 #define STRUCT_ALIGNMENT 32 92 #define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT) 93 94 /* The actual configuration determine if the init/exit sections 95 * are handled as text/data or they can be discarded (which 96 * often happens at runtime) 97 */ 98 #ifdef CONFIG_HOTPLUG_CPU 99 #define CPU_KEEP(sec) *(.cpu##sec) 100 #define CPU_DISCARD(sec) 101 #else 102 #define CPU_KEEP(sec) 103 #define CPU_DISCARD(sec) *(.cpu##sec) 104 #endif 105 106 #if defined(CONFIG_MEMORY_HOTPLUG) 107 #define MEM_KEEP(sec) *(.mem##sec) 108 #define MEM_DISCARD(sec) 109 #else 110 #define MEM_KEEP(sec) 111 #define MEM_DISCARD(sec) *(.mem##sec) 112 #endif 113 114 #ifdef CONFIG_FTRACE_MCOUNT_RECORD 115 #define MCOUNT_REC() . = ALIGN(8); \ 116 __start_mcount_loc = .; \ 117 KEEP(*(__mcount_loc)) \ 118 __stop_mcount_loc = .; 119 #else 120 #define MCOUNT_REC() 121 #endif 122 123 #ifdef CONFIG_TRACE_BRANCH_PROFILING 124 #define LIKELY_PROFILE() __start_annotated_branch_profile = .; \ 125 KEEP(*(_ftrace_annotated_branch)) \ 126 __stop_annotated_branch_profile = .; 127 #else 128 #define LIKELY_PROFILE() 129 #endif 130 131 #ifdef CONFIG_PROFILE_ALL_BRANCHES 132 #define BRANCH_PROFILE() __start_branch_profile = .; \ 133 KEEP(*(_ftrace_branch)) \ 134 __stop_branch_profile = .; 135 #else 136 #define BRANCH_PROFILE() 137 #endif 138 139 #ifdef CONFIG_KPROBES 140 #define KPROBE_BLACKLIST() . = ALIGN(8); \ 141 __start_kprobe_blacklist = .; \ 142 KEEP(*(_kprobe_blacklist)) \ 143 __stop_kprobe_blacklist = .; 144 #else 145 #define KPROBE_BLACKLIST() 146 #endif 147 148 #ifdef CONFIG_FUNCTION_ERROR_INJECTION 149 #define ERROR_INJECT_WHITELIST() STRUCT_ALIGN(); \ 150 __start_error_injection_whitelist = .; \ 151 KEEP(*(_error_injection_whitelist)) \ 152 __stop_error_injection_whitelist = .; 153 #else 154 #define ERROR_INJECT_WHITELIST() 155 #endif 156 157 #ifdef CONFIG_EVENT_TRACING 158 #define FTRACE_EVENTS() . = ALIGN(8); \ 159 __start_ftrace_events = .; \ 160 KEEP(*(_ftrace_events)) \ 161 __stop_ftrace_events = .; \ 162 __start_ftrace_eval_maps = .; \ 163 KEEP(*(_ftrace_eval_map)) \ 164 __stop_ftrace_eval_maps = .; 165 #else 166 #define FTRACE_EVENTS() 167 #endif 168 169 #ifdef CONFIG_TRACING 170 #define TRACE_PRINTKS() __start___trace_bprintk_fmt = .; \ 171 KEEP(*(__trace_printk_fmt)) /* Trace_printk fmt' pointer */ \ 172 __stop___trace_bprintk_fmt = .; 173 #define TRACEPOINT_STR() __start___tracepoint_str = .; \ 174 KEEP(*(__tracepoint_str)) /* Trace_printk fmt' pointer */ \ 175 __stop___tracepoint_str = .; 176 #else 177 #define TRACE_PRINTKS() 178 #define TRACEPOINT_STR() 179 #endif 180 181 #ifdef CONFIG_FTRACE_SYSCALLS 182 #define TRACE_SYSCALLS() . = ALIGN(8); \ 183 __start_syscalls_metadata = .; \ 184 KEEP(*(__syscalls_metadata)) \ 185 __stop_syscalls_metadata = .; 186 #else 187 #define TRACE_SYSCALLS() 188 #endif 189 190 #ifdef CONFIG_BPF_EVENTS 191 #define BPF_RAW_TP() STRUCT_ALIGN(); \ 192 __start__bpf_raw_tp = .; \ 193 KEEP(*(__bpf_raw_tp_map)) \ 194 __stop__bpf_raw_tp = .; 195 #else 196 #define BPF_RAW_TP() 197 #endif 198 199 #ifdef CONFIG_SERIAL_EARLYCON 200 #define EARLYCON_TABLE() . = ALIGN(8); \ 201 __earlycon_table = .; \ 202 KEEP(*(__earlycon_table)) \ 203 __earlycon_table_end = .; 204 #else 205 #define EARLYCON_TABLE() 206 #endif 207 208 #define ___OF_TABLE(cfg, name) _OF_TABLE_##cfg(name) 209 #define __OF_TABLE(cfg, name) ___OF_TABLE(cfg, name) 210 #define OF_TABLE(cfg, name) __OF_TABLE(IS_ENABLED(cfg), name) 211 #define _OF_TABLE_0(name) 212 #define _OF_TABLE_1(name) \ 213 . = ALIGN(8); \ 214 __##name##_of_table = .; \ 215 KEEP(*(__##name##_of_table)) \ 216 KEEP(*(__##name##_of_table_end)) 217 218 #define TIMER_OF_TABLES() OF_TABLE(CONFIG_TIMER_OF, timer) 219 #define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip) 220 #define CLK_OF_TABLES() OF_TABLE(CONFIG_COMMON_CLK, clk) 221 #define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem) 222 #define CPU_METHOD_OF_TABLES() OF_TABLE(CONFIG_SMP, cpu_method) 223 #define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method) 224 225 #ifdef CONFIG_ACPI 226 #define ACPI_PROBE_TABLE(name) \ 227 . = ALIGN(8); \ 228 __##name##_acpi_probe_table = .; \ 229 KEEP(*(__##name##_acpi_probe_table)) \ 230 __##name##_acpi_probe_table_end = .; 231 #else 232 #define ACPI_PROBE_TABLE(name) 233 #endif 234 235 #define KERNEL_DTB() \ 236 STRUCT_ALIGN(); \ 237 __dtb_start = .; \ 238 KEEP(*(.dtb.init.rodata)) \ 239 __dtb_end = .; 240 241 /* 242 * .data section 243 */ 244 #define DATA_DATA \ 245 *(.xiptext) \ 246 *(DATA_MAIN) \ 247 *(.ref.data) \ 248 *(.data..shared_aligned) /* percpu related */ \ 249 MEM_KEEP(init.data*) \ 250 MEM_KEEP(exit.data*) \ 251 *(.data.unlikely) \ 252 __start_once = .; \ 253 *(.data.once) \ 254 __end_once = .; \ 255 STRUCT_ALIGN(); \ 256 *(__tracepoints) \ 257 /* implement dynamic printk debug */ \ 258 . = ALIGN(8); \ 259 __start___jump_table = .; \ 260 KEEP(*(__jump_table)) \ 261 __stop___jump_table = .; \ 262 . = ALIGN(8); \ 263 __start___verbose = .; \ 264 KEEP(*(__verbose)) \ 265 __stop___verbose = .; \ 266 LIKELY_PROFILE() \ 267 BRANCH_PROFILE() \ 268 TRACE_PRINTKS() \ 269 BPF_RAW_TP() \ 270 TRACEPOINT_STR() 271 272 /* 273 * Data section helpers 274 */ 275 #define NOSAVE_DATA \ 276 . = ALIGN(PAGE_SIZE); \ 277 __nosave_begin = .; \ 278 *(.data..nosave) \ 279 . = ALIGN(PAGE_SIZE); \ 280 __nosave_end = .; 281 282 #define PAGE_ALIGNED_DATA(page_align) \ 283 . = ALIGN(page_align); \ 284 *(.data..page_aligned) 285 286 #define READ_MOSTLY_DATA(align) \ 287 . = ALIGN(align); \ 288 *(.data..read_mostly) \ 289 . = ALIGN(align); 290 291 #define CACHELINE_ALIGNED_DATA(align) \ 292 . = ALIGN(align); \ 293 *(.data..cacheline_aligned) 294 295 #define INIT_TASK_DATA(align) \ 296 . = ALIGN(align); \ 297 __start_init_task = .; \ 298 init_thread_union = .; \ 299 init_stack = .; \ 300 KEEP(*(.data..init_task)) \ 301 KEEP(*(.data..init_thread_info)) \ 302 . = __start_init_task + THREAD_SIZE; \ 303 __end_init_task = .; 304 305 /* 306 * Allow architectures to handle ro_after_init data on their 307 * own by defining an empty RO_AFTER_INIT_DATA. 308 */ 309 #ifndef RO_AFTER_INIT_DATA 310 #define RO_AFTER_INIT_DATA \ 311 __start_ro_after_init = .; \ 312 *(.data..ro_after_init) \ 313 __end_ro_after_init = .; 314 #endif 315 316 /* 317 * Read only Data 318 */ 319 #define RO_DATA_SECTION(align) \ 320 . = ALIGN((align)); \ 321 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \ 322 __start_rodata = .; \ 323 *(.rodata) *(.rodata.*) \ 324 RO_AFTER_INIT_DATA /* Read only after init */ \ 325 KEEP(*(__vermagic)) /* Kernel version magic */ \ 326 . = ALIGN(8); \ 327 __start___tracepoints_ptrs = .; \ 328 KEEP(*(__tracepoints_ptrs)) /* Tracepoints: pointer array */ \ 329 __stop___tracepoints_ptrs = .; \ 330 *(__tracepoints_strings)/* Tracepoints: strings */ \ 331 } \ 332 \ 333 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \ 334 *(.rodata1) \ 335 } \ 336 \ 337 /* PCI quirks */ \ 338 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \ 339 __start_pci_fixups_early = .; \ 340 KEEP(*(.pci_fixup_early)) \ 341 __end_pci_fixups_early = .; \ 342 __start_pci_fixups_header = .; \ 343 KEEP(*(.pci_fixup_header)) \ 344 __end_pci_fixups_header = .; \ 345 __start_pci_fixups_final = .; \ 346 KEEP(*(.pci_fixup_final)) \ 347 __end_pci_fixups_final = .; \ 348 __start_pci_fixups_enable = .; \ 349 KEEP(*(.pci_fixup_enable)) \ 350 __end_pci_fixups_enable = .; \ 351 __start_pci_fixups_resume = .; \ 352 KEEP(*(.pci_fixup_resume)) \ 353 __end_pci_fixups_resume = .; \ 354 __start_pci_fixups_resume_early = .; \ 355 KEEP(*(.pci_fixup_resume_early)) \ 356 __end_pci_fixups_resume_early = .; \ 357 __start_pci_fixups_suspend = .; \ 358 KEEP(*(.pci_fixup_suspend)) \ 359 __end_pci_fixups_suspend = .; \ 360 __start_pci_fixups_suspend_late = .; \ 361 KEEP(*(.pci_fixup_suspend_late)) \ 362 __end_pci_fixups_suspend_late = .; \ 363 } \ 364 \ 365 /* Built-in firmware blobs */ \ 366 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \ 367 __start_builtin_fw = .; \ 368 KEEP(*(.builtin_fw)) \ 369 __end_builtin_fw = .; \ 370 } \ 371 \ 372 TRACEDATA \ 373 \ 374 /* Kernel symbol table: Normal symbols */ \ 375 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \ 376 __start___ksymtab = .; \ 377 KEEP(*(SORT(___ksymtab+*))) \ 378 __stop___ksymtab = .; \ 379 } \ 380 \ 381 /* Kernel symbol table: GPL-only symbols */ \ 382 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \ 383 __start___ksymtab_gpl = .; \ 384 KEEP(*(SORT(___ksymtab_gpl+*))) \ 385 __stop___ksymtab_gpl = .; \ 386 } \ 387 \ 388 /* Kernel symbol table: Normal unused symbols */ \ 389 __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \ 390 __start___ksymtab_unused = .; \ 391 KEEP(*(SORT(___ksymtab_unused+*))) \ 392 __stop___ksymtab_unused = .; \ 393 } \ 394 \ 395 /* Kernel symbol table: GPL-only unused symbols */ \ 396 __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \ 397 __start___ksymtab_unused_gpl = .; \ 398 KEEP(*(SORT(___ksymtab_unused_gpl+*))) \ 399 __stop___ksymtab_unused_gpl = .; \ 400 } \ 401 \ 402 /* Kernel symbol table: GPL-future-only symbols */ \ 403 __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \ 404 __start___ksymtab_gpl_future = .; \ 405 KEEP(*(SORT(___ksymtab_gpl_future+*))) \ 406 __stop___ksymtab_gpl_future = .; \ 407 } \ 408 \ 409 /* Kernel symbol table: Normal symbols */ \ 410 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \ 411 __start___kcrctab = .; \ 412 KEEP(*(SORT(___kcrctab+*))) \ 413 __stop___kcrctab = .; \ 414 } \ 415 \ 416 /* Kernel symbol table: GPL-only symbols */ \ 417 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \ 418 __start___kcrctab_gpl = .; \ 419 KEEP(*(SORT(___kcrctab_gpl+*))) \ 420 __stop___kcrctab_gpl = .; \ 421 } \ 422 \ 423 /* Kernel symbol table: Normal unused symbols */ \ 424 __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \ 425 __start___kcrctab_unused = .; \ 426 KEEP(*(SORT(___kcrctab_unused+*))) \ 427 __stop___kcrctab_unused = .; \ 428 } \ 429 \ 430 /* Kernel symbol table: GPL-only unused symbols */ \ 431 __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \ 432 __start___kcrctab_unused_gpl = .; \ 433 KEEP(*(SORT(___kcrctab_unused_gpl+*))) \ 434 __stop___kcrctab_unused_gpl = .; \ 435 } \ 436 \ 437 /* Kernel symbol table: GPL-future-only symbols */ \ 438 __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \ 439 __start___kcrctab_gpl_future = .; \ 440 KEEP(*(SORT(___kcrctab_gpl_future+*))) \ 441 __stop___kcrctab_gpl_future = .; \ 442 } \ 443 \ 444 /* Kernel symbol table: strings */ \ 445 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \ 446 *(__ksymtab_strings) \ 447 } \ 448 \ 449 /* __*init sections */ \ 450 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \ 451 *(.ref.rodata) \ 452 MEM_KEEP(init.rodata) \ 453 MEM_KEEP(exit.rodata) \ 454 } \ 455 \ 456 /* Built-in module parameters. */ \ 457 __param : AT(ADDR(__param) - LOAD_OFFSET) { \ 458 __start___param = .; \ 459 KEEP(*(__param)) \ 460 __stop___param = .; \ 461 } \ 462 \ 463 /* Built-in module versions. */ \ 464 __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \ 465 __start___modver = .; \ 466 KEEP(*(__modver)) \ 467 __stop___modver = .; \ 468 . = ALIGN((align)); \ 469 __end_rodata = .; \ 470 } \ 471 . = ALIGN((align)); 472 473 /* RODATA & RO_DATA provided for backward compatibility. 474 * All archs are supposed to use RO_DATA() */ 475 #define RODATA RO_DATA_SECTION(4096) 476 #define RO_DATA(align) RO_DATA_SECTION(align) 477 478 #define SECURITY_INIT \ 479 .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \ 480 __security_initcall_start = .; \ 481 KEEP(*(.security_initcall.init)) \ 482 __security_initcall_end = .; \ 483 } 484 485 /* 486 * .text section. Map to function alignment to avoid address changes 487 * during second ld run in second ld pass when generating System.map 488 * 489 * TEXT_MAIN here will match .text.fixup and .text.unlikely if dead 490 * code elimination is enabled, so these sections should be converted 491 * to use ".." first. 492 */ 493 #define TEXT_TEXT \ 494 ALIGN_FUNCTION(); \ 495 *(.text.hot TEXT_MAIN .text.fixup .text.unlikely) \ 496 *(.text..refcount) \ 497 *(.ref.text) \ 498 MEM_KEEP(init.text*) \ 499 MEM_KEEP(exit.text*) \ 500 501 502 /* sched.text is aling to function alignment to secure we have same 503 * address even at second ld pass when generating System.map */ 504 #define SCHED_TEXT \ 505 ALIGN_FUNCTION(); \ 506 __sched_text_start = .; \ 507 *(.sched.text) \ 508 __sched_text_end = .; 509 510 /* spinlock.text is aling to function alignment to secure we have same 511 * address even at second ld pass when generating System.map */ 512 #define LOCK_TEXT \ 513 ALIGN_FUNCTION(); \ 514 __lock_text_start = .; \ 515 *(.spinlock.text) \ 516 __lock_text_end = .; 517 518 #define CPUIDLE_TEXT \ 519 ALIGN_FUNCTION(); \ 520 __cpuidle_text_start = .; \ 521 *(.cpuidle.text) \ 522 __cpuidle_text_end = .; 523 524 #define KPROBES_TEXT \ 525 ALIGN_FUNCTION(); \ 526 __kprobes_text_start = .; \ 527 *(.kprobes.text) \ 528 __kprobes_text_end = .; 529 530 #define ENTRY_TEXT \ 531 ALIGN_FUNCTION(); \ 532 __entry_text_start = .; \ 533 *(.entry.text) \ 534 __entry_text_end = .; 535 536 #define IRQENTRY_TEXT \ 537 ALIGN_FUNCTION(); \ 538 __irqentry_text_start = .; \ 539 *(.irqentry.text) \ 540 __irqentry_text_end = .; 541 542 #define SOFTIRQENTRY_TEXT \ 543 ALIGN_FUNCTION(); \ 544 __softirqentry_text_start = .; \ 545 *(.softirqentry.text) \ 546 __softirqentry_text_end = .; 547 548 /* Section used for early init (in .S files) */ 549 #define HEAD_TEXT KEEP(*(.head.text)) 550 551 #define HEAD_TEXT_SECTION \ 552 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \ 553 HEAD_TEXT \ 554 } 555 556 /* 557 * Exception table 558 */ 559 #define EXCEPTION_TABLE(align) \ 560 . = ALIGN(align); \ 561 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \ 562 __start___ex_table = .; \ 563 KEEP(*(__ex_table)) \ 564 __stop___ex_table = .; \ 565 } 566 567 /* 568 * Init task 569 */ 570 #define INIT_TASK_DATA_SECTION(align) \ 571 . = ALIGN(align); \ 572 .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \ 573 INIT_TASK_DATA(align) \ 574 } 575 576 #ifdef CONFIG_CONSTRUCTORS 577 #define KERNEL_CTORS() . = ALIGN(8); \ 578 __ctors_start = .; \ 579 KEEP(*(.ctors)) \ 580 KEEP(*(SORT(.init_array.*))) \ 581 KEEP(*(.init_array)) \ 582 __ctors_end = .; 583 #else 584 #define KERNEL_CTORS() 585 #endif 586 587 /* init and exit section handling */ 588 #define INIT_DATA \ 589 KEEP(*(SORT(___kentry+*))) \ 590 *(.init.data init.data.*) \ 591 MEM_DISCARD(init.data*) \ 592 KERNEL_CTORS() \ 593 MCOUNT_REC() \ 594 *(.init.rodata .init.rodata.*) \ 595 FTRACE_EVENTS() \ 596 TRACE_SYSCALLS() \ 597 KPROBE_BLACKLIST() \ 598 ERROR_INJECT_WHITELIST() \ 599 MEM_DISCARD(init.rodata) \ 600 CLK_OF_TABLES() \ 601 RESERVEDMEM_OF_TABLES() \ 602 TIMER_OF_TABLES() \ 603 CPU_METHOD_OF_TABLES() \ 604 CPUIDLE_METHOD_OF_TABLES() \ 605 KERNEL_DTB() \ 606 IRQCHIP_OF_MATCH_TABLE() \ 607 ACPI_PROBE_TABLE(irqchip) \ 608 ACPI_PROBE_TABLE(timer) \ 609 EARLYCON_TABLE() 610 611 #define INIT_TEXT \ 612 *(.init.text .init.text.*) \ 613 *(.text.startup) \ 614 MEM_DISCARD(init.text*) 615 616 #define EXIT_DATA \ 617 *(.exit.data .exit.data.*) \ 618 *(.fini_array) \ 619 *(.dtors) \ 620 MEM_DISCARD(exit.data*) \ 621 MEM_DISCARD(exit.rodata*) 622 623 #define EXIT_TEXT \ 624 *(.exit.text) \ 625 *(.text.exit) \ 626 MEM_DISCARD(exit.text) 627 628 #define EXIT_CALL \ 629 *(.exitcall.exit) 630 631 /* 632 * bss (Block Started by Symbol) - uninitialized data 633 * zeroed during startup 634 */ 635 #define SBSS(sbss_align) \ 636 . = ALIGN(sbss_align); \ 637 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \ 638 *(.dynsbss) \ 639 *(SBSS_MAIN) \ 640 *(.scommon) \ 641 } 642 643 /* 644 * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra 645 * sections to the front of bss. 646 */ 647 #ifndef BSS_FIRST_SECTIONS 648 #define BSS_FIRST_SECTIONS 649 #endif 650 651 #define BSS(bss_align) \ 652 . = ALIGN(bss_align); \ 653 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \ 654 BSS_FIRST_SECTIONS \ 655 *(.bss..page_aligned) \ 656 *(.dynbss) \ 657 *(BSS_MAIN) \ 658 *(COMMON) \ 659 } 660 661 /* 662 * DWARF debug sections. 663 * Symbols in the DWARF debugging sections are relative to 664 * the beginning of the section so we begin them at 0. 665 */ 666 #define DWARF_DEBUG \ 667 /* DWARF 1 */ \ 668 .debug 0 : { *(.debug) } \ 669 .line 0 : { *(.line) } \ 670 /* GNU DWARF 1 extensions */ \ 671 .debug_srcinfo 0 : { *(.debug_srcinfo) } \ 672 .debug_sfnames 0 : { *(.debug_sfnames) } \ 673 /* DWARF 1.1 and DWARF 2 */ \ 674 .debug_aranges 0 : { *(.debug_aranges) } \ 675 .debug_pubnames 0 : { *(.debug_pubnames) } \ 676 /* DWARF 2 */ \ 677 .debug_info 0 : { *(.debug_info \ 678 .gnu.linkonce.wi.*) } \ 679 .debug_abbrev 0 : { *(.debug_abbrev) } \ 680 .debug_line 0 : { *(.debug_line) } \ 681 .debug_frame 0 : { *(.debug_frame) } \ 682 .debug_str 0 : { *(.debug_str) } \ 683 .debug_loc 0 : { *(.debug_loc) } \ 684 .debug_macinfo 0 : { *(.debug_macinfo) } \ 685 .debug_pubtypes 0 : { *(.debug_pubtypes) } \ 686 /* DWARF 3 */ \ 687 .debug_ranges 0 : { *(.debug_ranges) } \ 688 /* SGI/MIPS DWARF 2 extensions */ \ 689 .debug_weaknames 0 : { *(.debug_weaknames) } \ 690 .debug_funcnames 0 : { *(.debug_funcnames) } \ 691 .debug_typenames 0 : { *(.debug_typenames) } \ 692 .debug_varnames 0 : { *(.debug_varnames) } \ 693 /* GNU DWARF 2 extensions */ \ 694 .debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) } \ 695 .debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) } \ 696 /* DWARF 4 */ \ 697 .debug_types 0 : { *(.debug_types) } \ 698 /* DWARF 5 */ \ 699 .debug_macro 0 : { *(.debug_macro) } \ 700 .debug_addr 0 : { *(.debug_addr) } 701 702 /* Stabs debugging sections. */ 703 #define STABS_DEBUG \ 704 .stab 0 : { *(.stab) } \ 705 .stabstr 0 : { *(.stabstr) } \ 706 .stab.excl 0 : { *(.stab.excl) } \ 707 .stab.exclstr 0 : { *(.stab.exclstr) } \ 708 .stab.index 0 : { *(.stab.index) } \ 709 .stab.indexstr 0 : { *(.stab.indexstr) } \ 710 .comment 0 : { *(.comment) } 711 712 #ifdef CONFIG_GENERIC_BUG 713 #define BUG_TABLE \ 714 . = ALIGN(8); \ 715 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \ 716 __start___bug_table = .; \ 717 KEEP(*(__bug_table)) \ 718 __stop___bug_table = .; \ 719 } 720 #else 721 #define BUG_TABLE 722 #endif 723 724 #ifdef CONFIG_UNWINDER_ORC 725 #define ORC_UNWIND_TABLE \ 726 . = ALIGN(4); \ 727 .orc_unwind_ip : AT(ADDR(.orc_unwind_ip) - LOAD_OFFSET) { \ 728 __start_orc_unwind_ip = .; \ 729 KEEP(*(.orc_unwind_ip)) \ 730 __stop_orc_unwind_ip = .; \ 731 } \ 732 . = ALIGN(6); \ 733 .orc_unwind : AT(ADDR(.orc_unwind) - LOAD_OFFSET) { \ 734 __start_orc_unwind = .; \ 735 KEEP(*(.orc_unwind)) \ 736 __stop_orc_unwind = .; \ 737 } \ 738 . = ALIGN(4); \ 739 .orc_lookup : AT(ADDR(.orc_lookup) - LOAD_OFFSET) { \ 740 orc_lookup = .; \ 741 . += (((SIZEOF(.text) + LOOKUP_BLOCK_SIZE - 1) / \ 742 LOOKUP_BLOCK_SIZE) + 1) * 4; \ 743 orc_lookup_end = .; \ 744 } 745 #else 746 #define ORC_UNWIND_TABLE 747 #endif 748 749 #ifdef CONFIG_PM_TRACE 750 #define TRACEDATA \ 751 . = ALIGN(4); \ 752 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \ 753 __tracedata_start = .; \ 754 KEEP(*(.tracedata)) \ 755 __tracedata_end = .; \ 756 } 757 #else 758 #define TRACEDATA 759 #endif 760 761 #define NOTES \ 762 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \ 763 __start_notes = .; \ 764 KEEP(*(.note.*)) \ 765 __stop_notes = .; \ 766 } 767 768 #define INIT_SETUP(initsetup_align) \ 769 . = ALIGN(initsetup_align); \ 770 __setup_start = .; \ 771 KEEP(*(.init.setup)) \ 772 __setup_end = .; 773 774 #define INIT_CALLS_LEVEL(level) \ 775 __initcall##level##_start = .; \ 776 KEEP(*(.initcall##level##.init)) \ 777 KEEP(*(.initcall##level##s.init)) \ 778 779 #define INIT_CALLS \ 780 __initcall_start = .; \ 781 KEEP(*(.initcallearly.init)) \ 782 INIT_CALLS_LEVEL(0) \ 783 INIT_CALLS_LEVEL(1) \ 784 INIT_CALLS_LEVEL(2) \ 785 INIT_CALLS_LEVEL(3) \ 786 INIT_CALLS_LEVEL(4) \ 787 INIT_CALLS_LEVEL(5) \ 788 INIT_CALLS_LEVEL(rootfs) \ 789 INIT_CALLS_LEVEL(6) \ 790 INIT_CALLS_LEVEL(7) \ 791 __initcall_end = .; 792 793 #define CON_INITCALL \ 794 __con_initcall_start = .; \ 795 KEEP(*(.con_initcall.init)) \ 796 __con_initcall_end = .; 797 798 #define SECURITY_INITCALL \ 799 __security_initcall_start = .; \ 800 KEEP(*(.security_initcall.init)) \ 801 __security_initcall_end = .; 802 803 #ifdef CONFIG_BLK_DEV_INITRD 804 #define INIT_RAM_FS \ 805 . = ALIGN(4); \ 806 __initramfs_start = .; \ 807 KEEP(*(.init.ramfs)) \ 808 . = ALIGN(8); \ 809 KEEP(*(.init.ramfs.info)) 810 #else 811 #define INIT_RAM_FS 812 #endif 813 814 /* 815 * Memory encryption operates on a page basis. Since we need to clear 816 * the memory encryption mask for this section, it needs to be aligned 817 * on a page boundary and be a page-size multiple in length. 818 * 819 * Note: We use a separate section so that only this section gets 820 * decrypted to avoid exposing more than we wish. 821 */ 822 #ifdef CONFIG_AMD_MEM_ENCRYPT 823 #define PERCPU_DECRYPTED_SECTION \ 824 . = ALIGN(PAGE_SIZE); \ 825 *(.data..percpu..decrypted) \ 826 . = ALIGN(PAGE_SIZE); 827 #else 828 #define PERCPU_DECRYPTED_SECTION 829 #endif 830 831 832 /* 833 * Default discarded sections. 834 * 835 * Some archs want to discard exit text/data at runtime rather than 836 * link time due to cross-section references such as alt instructions, 837 * bug table, eh_frame, etc. DISCARDS must be the last of output 838 * section definitions so that such archs put those in earlier section 839 * definitions. 840 */ 841 #define DISCARDS \ 842 /DISCARD/ : { \ 843 EXIT_TEXT \ 844 EXIT_DATA \ 845 EXIT_CALL \ 846 *(.discard) \ 847 *(.discard.*) \ 848 } 849 850 /** 851 * PERCPU_INPUT - the percpu input sections 852 * @cacheline: cacheline size 853 * 854 * The core percpu section names and core symbols which do not rely 855 * directly upon load addresses. 856 * 857 * @cacheline is used to align subsections to avoid false cacheline 858 * sharing between subsections for different purposes. 859 */ 860 #define PERCPU_INPUT(cacheline) \ 861 __per_cpu_start = .; \ 862 *(.data..percpu..first) \ 863 . = ALIGN(PAGE_SIZE); \ 864 *(.data..percpu..page_aligned) \ 865 . = ALIGN(cacheline); \ 866 *(.data..percpu..read_mostly) \ 867 . = ALIGN(cacheline); \ 868 *(.data..percpu) \ 869 *(.data..percpu..shared_aligned) \ 870 PERCPU_DECRYPTED_SECTION \ 871 __per_cpu_end = .; 872 873 /** 874 * PERCPU_VADDR - define output section for percpu area 875 * @cacheline: cacheline size 876 * @vaddr: explicit base address (optional) 877 * @phdr: destination PHDR (optional) 878 * 879 * Macro which expands to output section for percpu area. 880 * 881 * @cacheline is used to align subsections to avoid false cacheline 882 * sharing between subsections for different purposes. 883 * 884 * If @vaddr is not blank, it specifies explicit base address and all 885 * percpu symbols will be offset from the given address. If blank, 886 * @vaddr always equals @laddr + LOAD_OFFSET. 887 * 888 * @phdr defines the output PHDR to use if not blank. Be warned that 889 * output PHDR is sticky. If @phdr is specified, the next output 890 * section in the linker script will go there too. @phdr should have 891 * a leading colon. 892 * 893 * Note that this macros defines __per_cpu_load as an absolute symbol. 894 * If there is no need to put the percpu section at a predetermined 895 * address, use PERCPU_SECTION. 896 */ 897 #define PERCPU_VADDR(cacheline, vaddr, phdr) \ 898 __per_cpu_load = .; \ 899 .data..percpu vaddr : AT(__per_cpu_load - LOAD_OFFSET) { \ 900 PERCPU_INPUT(cacheline) \ 901 } phdr \ 902 . = __per_cpu_load + SIZEOF(.data..percpu); 903 904 /** 905 * PERCPU_SECTION - define output section for percpu area, simple version 906 * @cacheline: cacheline size 907 * 908 * Align to PAGE_SIZE and outputs output section for percpu area. This 909 * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and 910 * __per_cpu_start will be identical. 911 * 912 * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,) 913 * except that __per_cpu_load is defined as a relative symbol against 914 * .data..percpu which is required for relocatable x86_32 configuration. 915 */ 916 #define PERCPU_SECTION(cacheline) \ 917 . = ALIGN(PAGE_SIZE); \ 918 .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \ 919 __per_cpu_load = .; \ 920 PERCPU_INPUT(cacheline) \ 921 } 922 923 924 /* 925 * Definition of the high level *_SECTION macros 926 * They will fit only a subset of the architectures 927 */ 928 929 930 /* 931 * Writeable data. 932 * All sections are combined in a single .data section. 933 * The sections following CONSTRUCTORS are arranged so their 934 * typical alignment matches. 935 * A cacheline is typical/always less than a PAGE_SIZE so 936 * the sections that has this restriction (or similar) 937 * is located before the ones requiring PAGE_SIZE alignment. 938 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which 939 * matches the requirement of PAGE_ALIGNED_DATA. 940 * 941 * use 0 as page_align if page_aligned data is not used */ 942 #define RW_DATA_SECTION(cacheline, pagealigned, inittask) \ 943 . = ALIGN(PAGE_SIZE); \ 944 .data : AT(ADDR(.data) - LOAD_OFFSET) { \ 945 INIT_TASK_DATA(inittask) \ 946 NOSAVE_DATA \ 947 PAGE_ALIGNED_DATA(pagealigned) \ 948 CACHELINE_ALIGNED_DATA(cacheline) \ 949 READ_MOSTLY_DATA(cacheline) \ 950 DATA_DATA \ 951 CONSTRUCTORS \ 952 } \ 953 BUG_TABLE \ 954 955 #define INIT_TEXT_SECTION(inittext_align) \ 956 . = ALIGN(inittext_align); \ 957 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \ 958 _sinittext = .; \ 959 INIT_TEXT \ 960 _einittext = .; \ 961 } 962 963 #define INIT_DATA_SECTION(initsetup_align) \ 964 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \ 965 INIT_DATA \ 966 INIT_SETUP(initsetup_align) \ 967 INIT_CALLS \ 968 CON_INITCALL \ 969 SECURITY_INITCALL \ 970 INIT_RAM_FS \ 971 } 972 973 #define BSS_SECTION(sbss_align, bss_align, stop_align) \ 974 . = ALIGN(sbss_align); \ 975 __bss_start = .; \ 976 SBSS(sbss_align) \ 977 BSS(bss_align) \ 978 . = ALIGN(stop_align); \ 979 __bss_stop = .; 980