1 /* 2 * Helper macros to support writing architecture specific 3 * linker scripts. 4 * 5 * A minimal linker scripts has following content: 6 * [This is a sample, architectures may have special requiriements] 7 * 8 * OUTPUT_FORMAT(...) 9 * OUTPUT_ARCH(...) 10 * ENTRY(...) 11 * SECTIONS 12 * { 13 * . = START; 14 * __init_begin = .; 15 * HEAD_TEXT_SECTION 16 * INIT_TEXT_SECTION(PAGE_SIZE) 17 * INIT_DATA_SECTION(...) 18 * PERCPU_SECTION(CACHELINE_SIZE) 19 * __init_end = .; 20 * 21 * _stext = .; 22 * TEXT_SECTION = 0 23 * _etext = .; 24 * 25 * _sdata = .; 26 * RO_DATA(PAGE_SIZE) 27 * RW_DATA(...) 28 * _edata = .; 29 * 30 * EXCEPTION_TABLE(...) 31 * 32 * BSS_SECTION(0, 0, 0) 33 * _end = .; 34 * 35 * STABS_DEBUG 36 * DWARF_DEBUG 37 * ELF_DETAILS 38 * 39 * DISCARDS // must be the last 40 * } 41 * 42 * [__init_begin, __init_end] is the init section that may be freed after init 43 * // __init_begin and __init_end should be page aligned, so that we can 44 * // free the whole .init memory 45 * [_stext, _etext] is the text section 46 * [_sdata, _edata] is the data section 47 * 48 * Some of the included output section have their own set of constants. 49 * Examples are: [__initramfs_start, __initramfs_end] for initramfs and 50 * [__nosave_begin, __nosave_end] for the nosave data 51 */ 52 53 #ifndef LOAD_OFFSET 54 #define LOAD_OFFSET 0 55 #endif 56 57 /* 58 * Only some architectures want to have the .notes segment visible in 59 * a separate PT_NOTE ELF Program Header. When this happens, it needs 60 * to be visible in both the kernel text's PT_LOAD and the PT_NOTE 61 * Program Headers. In this case, though, the PT_LOAD needs to be made 62 * the default again so that all the following sections don't also end 63 * up in the PT_NOTE Program Header. 64 */ 65 #ifdef EMITS_PT_NOTE 66 #define NOTES_HEADERS :text :note 67 #define NOTES_HEADERS_RESTORE __restore_ph : { *(.__restore_ph) } :text 68 #else 69 #define NOTES_HEADERS 70 #define NOTES_HEADERS_RESTORE 71 #endif 72 73 /* 74 * Some architectures have non-executable read-only exception tables. 75 * They can be added to the RO_DATA segment by specifying their desired 76 * alignment. 77 */ 78 #ifdef RO_EXCEPTION_TABLE_ALIGN 79 #define RO_EXCEPTION_TABLE EXCEPTION_TABLE(RO_EXCEPTION_TABLE_ALIGN) 80 #else 81 #define RO_EXCEPTION_TABLE 82 #endif 83 84 /* Align . to a 8 byte boundary equals to maximum function alignment. */ 85 #define ALIGN_FUNCTION() . = ALIGN(8) 86 87 /* 88 * LD_DEAD_CODE_DATA_ELIMINATION option enables -fdata-sections, which 89 * generates .data.identifier sections, which need to be pulled in with 90 * .data. We don't want to pull in .data..other sections, which Linux 91 * has defined. Same for text and bss. 92 * 93 * With LTO_CLANG, the linker also splits sections by default, so we need 94 * these macros to combine the sections during the final link. 95 * 96 * RODATA_MAIN is not used because existing code already defines .rodata.x 97 * sections to be brought in with rodata. 98 */ 99 #if defined(CONFIG_LD_DEAD_CODE_DATA_ELIMINATION) || defined(CONFIG_LTO_CLANG) 100 #define TEXT_MAIN .text .text.[0-9a-zA-Z_]* 101 #define DATA_MAIN .data .data.[0-9a-zA-Z_]* .data..L* .data..compoundliteral* 102 #define SDATA_MAIN .sdata .sdata.[0-9a-zA-Z_]* 103 #define RODATA_MAIN .rodata .rodata.[0-9a-zA-Z_]* .rodata..L* 104 #define BSS_MAIN .bss .bss.[0-9a-zA-Z_]* .bss..compoundliteral* 105 #define SBSS_MAIN .sbss .sbss.[0-9a-zA-Z_]* 106 #else 107 #define TEXT_MAIN .text 108 #define DATA_MAIN .data 109 #define SDATA_MAIN .sdata 110 #define RODATA_MAIN .rodata 111 #define BSS_MAIN .bss 112 #define SBSS_MAIN .sbss 113 #endif 114 115 /* 116 * GCC 4.5 and later have a 32 bytes section alignment for structures. 117 * Except GCC 4.9, that feels the need to align on 64 bytes. 118 */ 119 #if __GNUC__ == 4 && __GNUC_MINOR__ == 9 120 #define STRUCT_ALIGNMENT 64 121 #else 122 #define STRUCT_ALIGNMENT 32 123 #endif 124 #define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT) 125 126 /* 127 * The order of the sched class addresses are important, as they are 128 * used to determine the order of the priority of each sched class in 129 * relation to each other. 130 */ 131 #define SCHED_DATA \ 132 STRUCT_ALIGN(); \ 133 __begin_sched_classes = .; \ 134 *(__idle_sched_class) \ 135 *(__fair_sched_class) \ 136 *(__rt_sched_class) \ 137 *(__dl_sched_class) \ 138 *(__stop_sched_class) \ 139 __end_sched_classes = .; 140 141 /* The actual configuration determine if the init/exit sections 142 * are handled as text/data or they can be discarded (which 143 * often happens at runtime) 144 */ 145 #ifdef CONFIG_HOTPLUG_CPU 146 #define CPU_KEEP(sec) *(.cpu##sec) 147 #define CPU_DISCARD(sec) 148 #else 149 #define CPU_KEEP(sec) 150 #define CPU_DISCARD(sec) *(.cpu##sec) 151 #endif 152 153 #if defined(CONFIG_MEMORY_HOTPLUG) 154 #define MEM_KEEP(sec) *(.mem##sec) 155 #define MEM_DISCARD(sec) 156 #else 157 #define MEM_KEEP(sec) 158 #define MEM_DISCARD(sec) *(.mem##sec) 159 #endif 160 161 #ifdef CONFIG_FTRACE_MCOUNT_RECORD 162 /* 163 * The ftrace call sites are logged to a section whose name depends on the 164 * compiler option used. A given kernel image will only use one, AKA 165 * FTRACE_CALLSITE_SECTION. We capture all of them here to avoid header 166 * dependencies for FTRACE_CALLSITE_SECTION's definition. 167 * 168 * Need to also make ftrace_stub_graph point to ftrace_stub 169 * so that the same stub location may have different protocols 170 * and not mess up with C verifiers. 171 */ 172 #define MCOUNT_REC() . = ALIGN(8); \ 173 __start_mcount_loc = .; \ 174 KEEP(*(__mcount_loc)) \ 175 KEEP(*(__patchable_function_entries)) \ 176 __stop_mcount_loc = .; \ 177 ftrace_stub_graph = ftrace_stub; 178 #else 179 # ifdef CONFIG_FUNCTION_TRACER 180 # define MCOUNT_REC() ftrace_stub_graph = ftrace_stub; 181 # else 182 # define MCOUNT_REC() 183 # endif 184 #endif 185 186 #ifdef CONFIG_TRACE_BRANCH_PROFILING 187 #define LIKELY_PROFILE() __start_annotated_branch_profile = .; \ 188 KEEP(*(_ftrace_annotated_branch)) \ 189 __stop_annotated_branch_profile = .; 190 #else 191 #define LIKELY_PROFILE() 192 #endif 193 194 #ifdef CONFIG_PROFILE_ALL_BRANCHES 195 #define BRANCH_PROFILE() __start_branch_profile = .; \ 196 KEEP(*(_ftrace_branch)) \ 197 __stop_branch_profile = .; 198 #else 199 #define BRANCH_PROFILE() 200 #endif 201 202 #ifdef CONFIG_KPROBES 203 #define KPROBE_BLACKLIST() . = ALIGN(8); \ 204 __start_kprobe_blacklist = .; \ 205 KEEP(*(_kprobe_blacklist)) \ 206 __stop_kprobe_blacklist = .; 207 #else 208 #define KPROBE_BLACKLIST() 209 #endif 210 211 #ifdef CONFIG_FUNCTION_ERROR_INJECTION 212 #define ERROR_INJECT_WHITELIST() STRUCT_ALIGN(); \ 213 __start_error_injection_whitelist = .; \ 214 KEEP(*(_error_injection_whitelist)) \ 215 __stop_error_injection_whitelist = .; 216 #else 217 #define ERROR_INJECT_WHITELIST() 218 #endif 219 220 #ifdef CONFIG_EVENT_TRACING 221 #define FTRACE_EVENTS() . = ALIGN(8); \ 222 __start_ftrace_events = .; \ 223 KEEP(*(_ftrace_events)) \ 224 __stop_ftrace_events = .; \ 225 __start_ftrace_eval_maps = .; \ 226 KEEP(*(_ftrace_eval_map)) \ 227 __stop_ftrace_eval_maps = .; 228 #else 229 #define FTRACE_EVENTS() 230 #endif 231 232 #ifdef CONFIG_TRACING 233 #define TRACE_PRINTKS() __start___trace_bprintk_fmt = .; \ 234 KEEP(*(__trace_printk_fmt)) /* Trace_printk fmt' pointer */ \ 235 __stop___trace_bprintk_fmt = .; 236 #define TRACEPOINT_STR() __start___tracepoint_str = .; \ 237 KEEP(*(__tracepoint_str)) /* Trace_printk fmt' pointer */ \ 238 __stop___tracepoint_str = .; 239 #else 240 #define TRACE_PRINTKS() 241 #define TRACEPOINT_STR() 242 #endif 243 244 #ifdef CONFIG_FTRACE_SYSCALLS 245 #define TRACE_SYSCALLS() . = ALIGN(8); \ 246 __start_syscalls_metadata = .; \ 247 KEEP(*(__syscalls_metadata)) \ 248 __stop_syscalls_metadata = .; 249 #else 250 #define TRACE_SYSCALLS() 251 #endif 252 253 #ifdef CONFIG_BPF_EVENTS 254 #define BPF_RAW_TP() STRUCT_ALIGN(); \ 255 __start__bpf_raw_tp = .; \ 256 KEEP(*(__bpf_raw_tp_map)) \ 257 __stop__bpf_raw_tp = .; 258 #else 259 #define BPF_RAW_TP() 260 #endif 261 262 #ifdef CONFIG_SERIAL_EARLYCON 263 #define EARLYCON_TABLE() . = ALIGN(8); \ 264 __earlycon_table = .; \ 265 KEEP(*(__earlycon_table)) \ 266 __earlycon_table_end = .; 267 #else 268 #define EARLYCON_TABLE() 269 #endif 270 271 #ifdef CONFIG_SECURITY 272 #define LSM_TABLE() . = ALIGN(8); \ 273 __start_lsm_info = .; \ 274 KEEP(*(.lsm_info.init)) \ 275 __end_lsm_info = .; 276 #define EARLY_LSM_TABLE() . = ALIGN(8); \ 277 __start_early_lsm_info = .; \ 278 KEEP(*(.early_lsm_info.init)) \ 279 __end_early_lsm_info = .; 280 #else 281 #define LSM_TABLE() 282 #define EARLY_LSM_TABLE() 283 #endif 284 285 #define ___OF_TABLE(cfg, name) _OF_TABLE_##cfg(name) 286 #define __OF_TABLE(cfg, name) ___OF_TABLE(cfg, name) 287 #define OF_TABLE(cfg, name) __OF_TABLE(IS_ENABLED(cfg), name) 288 #define _OF_TABLE_0(name) 289 #define _OF_TABLE_1(name) \ 290 . = ALIGN(8); \ 291 __##name##_of_table = .; \ 292 KEEP(*(__##name##_of_table)) \ 293 KEEP(*(__##name##_of_table_end)) 294 295 #define TIMER_OF_TABLES() OF_TABLE(CONFIG_TIMER_OF, timer) 296 #define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip) 297 #define CLK_OF_TABLES() OF_TABLE(CONFIG_COMMON_CLK, clk) 298 #define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem) 299 #define CPU_METHOD_OF_TABLES() OF_TABLE(CONFIG_SMP, cpu_method) 300 #define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method) 301 302 #ifdef CONFIG_ACPI 303 #define ACPI_PROBE_TABLE(name) \ 304 . = ALIGN(8); \ 305 __##name##_acpi_probe_table = .; \ 306 KEEP(*(__##name##_acpi_probe_table)) \ 307 __##name##_acpi_probe_table_end = .; 308 #else 309 #define ACPI_PROBE_TABLE(name) 310 #endif 311 312 #ifdef CONFIG_THERMAL 313 #define THERMAL_TABLE(name) \ 314 . = ALIGN(8); \ 315 __##name##_thermal_table = .; \ 316 KEEP(*(__##name##_thermal_table)) \ 317 __##name##_thermal_table_end = .; 318 #else 319 #define THERMAL_TABLE(name) 320 #endif 321 322 #ifdef CONFIG_DTPM 323 #define DTPM_TABLE() \ 324 . = ALIGN(8); \ 325 __dtpm_table = .; \ 326 KEEP(*(__dtpm_table)) \ 327 __dtpm_table_end = .; 328 #else 329 #define DTPM_TABLE() 330 #endif 331 332 #define KERNEL_DTB() \ 333 STRUCT_ALIGN(); \ 334 __dtb_start = .; \ 335 KEEP(*(.dtb.init.rodata)) \ 336 __dtb_end = .; 337 338 /* 339 * .data section 340 */ 341 #define DATA_DATA \ 342 *(.xiptext) \ 343 *(DATA_MAIN) \ 344 *(.data..decrypted) \ 345 *(.ref.data) \ 346 *(.data..shared_aligned) /* percpu related */ \ 347 MEM_KEEP(init.data*) \ 348 MEM_KEEP(exit.data*) \ 349 *(.data.unlikely) \ 350 __start_once = .; \ 351 *(.data.once) \ 352 __end_once = .; \ 353 STRUCT_ALIGN(); \ 354 *(__tracepoints) \ 355 /* implement dynamic printk debug */ \ 356 . = ALIGN(8); \ 357 __start___dyndbg = .; \ 358 KEEP(*(__dyndbg)) \ 359 __stop___dyndbg = .; \ 360 LIKELY_PROFILE() \ 361 BRANCH_PROFILE() \ 362 TRACE_PRINTKS() \ 363 BPF_RAW_TP() \ 364 TRACEPOINT_STR() 365 366 /* 367 * Data section helpers 368 */ 369 #define NOSAVE_DATA \ 370 . = ALIGN(PAGE_SIZE); \ 371 __nosave_begin = .; \ 372 *(.data..nosave) \ 373 . = ALIGN(PAGE_SIZE); \ 374 __nosave_end = .; 375 376 #define PAGE_ALIGNED_DATA(page_align) \ 377 . = ALIGN(page_align); \ 378 *(.data..page_aligned) \ 379 . = ALIGN(page_align); 380 381 #define READ_MOSTLY_DATA(align) \ 382 . = ALIGN(align); \ 383 *(.data..read_mostly) \ 384 . = ALIGN(align); 385 386 #define CACHELINE_ALIGNED_DATA(align) \ 387 . = ALIGN(align); \ 388 *(.data..cacheline_aligned) 389 390 #define INIT_TASK_DATA(align) \ 391 . = ALIGN(align); \ 392 __start_init_task = .; \ 393 init_thread_union = .; \ 394 init_stack = .; \ 395 KEEP(*(.data..init_task)) \ 396 KEEP(*(.data..init_thread_info)) \ 397 . = __start_init_task + THREAD_SIZE; \ 398 __end_init_task = .; 399 400 #define JUMP_TABLE_DATA \ 401 . = ALIGN(8); \ 402 __start___jump_table = .; \ 403 KEEP(*(__jump_table)) \ 404 __stop___jump_table = .; 405 406 #define STATIC_CALL_DATA \ 407 . = ALIGN(8); \ 408 __start_static_call_sites = .; \ 409 KEEP(*(.static_call_sites)) \ 410 __stop_static_call_sites = .; \ 411 __start_static_call_tramp_key = .; \ 412 KEEP(*(.static_call_tramp_key)) \ 413 __stop_static_call_tramp_key = .; 414 415 /* 416 * Allow architectures to handle ro_after_init data on their 417 * own by defining an empty RO_AFTER_INIT_DATA. 418 */ 419 #ifndef RO_AFTER_INIT_DATA 420 #define RO_AFTER_INIT_DATA \ 421 . = ALIGN(8); \ 422 __start_ro_after_init = .; \ 423 *(.data..ro_after_init) \ 424 JUMP_TABLE_DATA \ 425 STATIC_CALL_DATA \ 426 __end_ro_after_init = .; 427 #endif 428 429 /* 430 * Read only Data 431 */ 432 #define RO_DATA(align) \ 433 . = ALIGN((align)); \ 434 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \ 435 __start_rodata = .; \ 436 *(.rodata) *(.rodata.*) \ 437 SCHED_DATA \ 438 RO_AFTER_INIT_DATA /* Read only after init */ \ 439 . = ALIGN(8); \ 440 __start___tracepoints_ptrs = .; \ 441 KEEP(*(__tracepoints_ptrs)) /* Tracepoints: pointer array */ \ 442 __stop___tracepoints_ptrs = .; \ 443 *(__tracepoints_strings)/* Tracepoints: strings */ \ 444 } \ 445 \ 446 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \ 447 *(.rodata1) \ 448 } \ 449 \ 450 /* PCI quirks */ \ 451 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \ 452 __start_pci_fixups_early = .; \ 453 KEEP(*(.pci_fixup_early)) \ 454 __end_pci_fixups_early = .; \ 455 __start_pci_fixups_header = .; \ 456 KEEP(*(.pci_fixup_header)) \ 457 __end_pci_fixups_header = .; \ 458 __start_pci_fixups_final = .; \ 459 KEEP(*(.pci_fixup_final)) \ 460 __end_pci_fixups_final = .; \ 461 __start_pci_fixups_enable = .; \ 462 KEEP(*(.pci_fixup_enable)) \ 463 __end_pci_fixups_enable = .; \ 464 __start_pci_fixups_resume = .; \ 465 KEEP(*(.pci_fixup_resume)) \ 466 __end_pci_fixups_resume = .; \ 467 __start_pci_fixups_resume_early = .; \ 468 KEEP(*(.pci_fixup_resume_early)) \ 469 __end_pci_fixups_resume_early = .; \ 470 __start_pci_fixups_suspend = .; \ 471 KEEP(*(.pci_fixup_suspend)) \ 472 __end_pci_fixups_suspend = .; \ 473 __start_pci_fixups_suspend_late = .; \ 474 KEEP(*(.pci_fixup_suspend_late)) \ 475 __end_pci_fixups_suspend_late = .; \ 476 } \ 477 \ 478 /* Built-in firmware blobs */ \ 479 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) ALIGN(8) { \ 480 __start_builtin_fw = .; \ 481 KEEP(*(.builtin_fw)) \ 482 __end_builtin_fw = .; \ 483 } \ 484 \ 485 TRACEDATA \ 486 \ 487 /* Kernel symbol table: Normal symbols */ \ 488 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \ 489 __start___ksymtab = .; \ 490 KEEP(*(SORT(___ksymtab+*))) \ 491 __stop___ksymtab = .; \ 492 } \ 493 \ 494 /* Kernel symbol table: GPL-only symbols */ \ 495 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \ 496 __start___ksymtab_gpl = .; \ 497 KEEP(*(SORT(___ksymtab_gpl+*))) \ 498 __stop___ksymtab_gpl = .; \ 499 } \ 500 \ 501 /* Kernel symbol table: Normal unused symbols */ \ 502 __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \ 503 __start___ksymtab_unused = .; \ 504 KEEP(*(SORT(___ksymtab_unused+*))) \ 505 __stop___ksymtab_unused = .; \ 506 } \ 507 \ 508 /* Kernel symbol table: GPL-only unused symbols */ \ 509 __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \ 510 __start___ksymtab_unused_gpl = .; \ 511 KEEP(*(SORT(___ksymtab_unused_gpl+*))) \ 512 __stop___ksymtab_unused_gpl = .; \ 513 } \ 514 \ 515 /* Kernel symbol table: GPL-future-only symbols */ \ 516 __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \ 517 __start___ksymtab_gpl_future = .; \ 518 KEEP(*(SORT(___ksymtab_gpl_future+*))) \ 519 __stop___ksymtab_gpl_future = .; \ 520 } \ 521 \ 522 /* Kernel symbol table: Normal symbols */ \ 523 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \ 524 __start___kcrctab = .; \ 525 KEEP(*(SORT(___kcrctab+*))) \ 526 __stop___kcrctab = .; \ 527 } \ 528 \ 529 /* Kernel symbol table: GPL-only symbols */ \ 530 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \ 531 __start___kcrctab_gpl = .; \ 532 KEEP(*(SORT(___kcrctab_gpl+*))) \ 533 __stop___kcrctab_gpl = .; \ 534 } \ 535 \ 536 /* Kernel symbol table: Normal unused symbols */ \ 537 __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \ 538 __start___kcrctab_unused = .; \ 539 KEEP(*(SORT(___kcrctab_unused+*))) \ 540 __stop___kcrctab_unused = .; \ 541 } \ 542 \ 543 /* Kernel symbol table: GPL-only unused symbols */ \ 544 __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \ 545 __start___kcrctab_unused_gpl = .; \ 546 KEEP(*(SORT(___kcrctab_unused_gpl+*))) \ 547 __stop___kcrctab_unused_gpl = .; \ 548 } \ 549 \ 550 /* Kernel symbol table: GPL-future-only symbols */ \ 551 __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \ 552 __start___kcrctab_gpl_future = .; \ 553 KEEP(*(SORT(___kcrctab_gpl_future+*))) \ 554 __stop___kcrctab_gpl_future = .; \ 555 } \ 556 \ 557 /* Kernel symbol table: strings */ \ 558 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \ 559 *(__ksymtab_strings) \ 560 } \ 561 \ 562 /* __*init sections */ \ 563 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \ 564 *(.ref.rodata) \ 565 MEM_KEEP(init.rodata) \ 566 MEM_KEEP(exit.rodata) \ 567 } \ 568 \ 569 /* Built-in module parameters. */ \ 570 __param : AT(ADDR(__param) - LOAD_OFFSET) { \ 571 __start___param = .; \ 572 KEEP(*(__param)) \ 573 __stop___param = .; \ 574 } \ 575 \ 576 /* Built-in module versions. */ \ 577 __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \ 578 __start___modver = .; \ 579 KEEP(*(__modver)) \ 580 __stop___modver = .; \ 581 } \ 582 \ 583 RO_EXCEPTION_TABLE \ 584 NOTES \ 585 BTF \ 586 \ 587 . = ALIGN((align)); \ 588 __end_rodata = .; 589 590 591 /* 592 * .text..L.cfi.jumptable.* contain Control-Flow Integrity (CFI) 593 * jump table entries. 594 */ 595 #ifdef CONFIG_CFI_CLANG 596 #define TEXT_CFI_JT \ 597 . = ALIGN(PMD_SIZE); \ 598 __cfi_jt_start = .; \ 599 *(.text..L.cfi.jumptable .text..L.cfi.jumptable.*) \ 600 . = ALIGN(PMD_SIZE); \ 601 __cfi_jt_end = .; 602 #else 603 #define TEXT_CFI_JT 604 #endif 605 606 /* 607 * Non-instrumentable text section 608 */ 609 #define NOINSTR_TEXT \ 610 ALIGN_FUNCTION(); \ 611 __noinstr_text_start = .; \ 612 *(.noinstr.text) \ 613 __noinstr_text_end = .; 614 615 /* 616 * .text section. Map to function alignment to avoid address changes 617 * during second ld run in second ld pass when generating System.map 618 * 619 * TEXT_MAIN here will match .text.fixup and .text.unlikely if dead 620 * code elimination is enabled, so these sections should be converted 621 * to use ".." first. 622 */ 623 #define TEXT_TEXT \ 624 ALIGN_FUNCTION(); \ 625 *(.text.hot .text.hot.*) \ 626 *(TEXT_MAIN .text.fixup) \ 627 *(.text.unlikely .text.unlikely.*) \ 628 *(.text.unknown .text.unknown.*) \ 629 NOINSTR_TEXT \ 630 *(.text..refcount) \ 631 *(.ref.text) \ 632 *(.text.asan.* .text.tsan.*) \ 633 TEXT_CFI_JT \ 634 MEM_KEEP(init.text*) \ 635 MEM_KEEP(exit.text*) \ 636 637 638 /* sched.text is aling to function alignment to secure we have same 639 * address even at second ld pass when generating System.map */ 640 #define SCHED_TEXT \ 641 ALIGN_FUNCTION(); \ 642 __sched_text_start = .; \ 643 *(.sched.text) \ 644 __sched_text_end = .; 645 646 /* spinlock.text is aling to function alignment to secure we have same 647 * address even at second ld pass when generating System.map */ 648 #define LOCK_TEXT \ 649 ALIGN_FUNCTION(); \ 650 __lock_text_start = .; \ 651 *(.spinlock.text) \ 652 __lock_text_end = .; 653 654 #define CPUIDLE_TEXT \ 655 ALIGN_FUNCTION(); \ 656 __cpuidle_text_start = .; \ 657 *(.cpuidle.text) \ 658 __cpuidle_text_end = .; 659 660 #define KPROBES_TEXT \ 661 ALIGN_FUNCTION(); \ 662 __kprobes_text_start = .; \ 663 *(.kprobes.text) \ 664 __kprobes_text_end = .; 665 666 #define ENTRY_TEXT \ 667 ALIGN_FUNCTION(); \ 668 __entry_text_start = .; \ 669 *(.entry.text) \ 670 __entry_text_end = .; 671 672 #define IRQENTRY_TEXT \ 673 ALIGN_FUNCTION(); \ 674 __irqentry_text_start = .; \ 675 *(.irqentry.text) \ 676 __irqentry_text_end = .; 677 678 #define SOFTIRQENTRY_TEXT \ 679 ALIGN_FUNCTION(); \ 680 __softirqentry_text_start = .; \ 681 *(.softirqentry.text) \ 682 __softirqentry_text_end = .; 683 684 #define STATIC_CALL_TEXT \ 685 ALIGN_FUNCTION(); \ 686 __static_call_text_start = .; \ 687 *(.static_call.text) \ 688 __static_call_text_end = .; 689 690 /* Section used for early init (in .S files) */ 691 #define HEAD_TEXT KEEP(*(.head.text)) 692 693 #define HEAD_TEXT_SECTION \ 694 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \ 695 HEAD_TEXT \ 696 } 697 698 /* 699 * Exception table 700 */ 701 #define EXCEPTION_TABLE(align) \ 702 . = ALIGN(align); \ 703 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \ 704 __start___ex_table = .; \ 705 KEEP(*(__ex_table)) \ 706 __stop___ex_table = .; \ 707 } 708 709 /* 710 * .BTF 711 */ 712 #ifdef CONFIG_DEBUG_INFO_BTF 713 #define BTF \ 714 .BTF : AT(ADDR(.BTF) - LOAD_OFFSET) { \ 715 __start_BTF = .; \ 716 KEEP(*(.BTF)) \ 717 __stop_BTF = .; \ 718 } \ 719 . = ALIGN(4); \ 720 .BTF_ids : AT(ADDR(.BTF_ids) - LOAD_OFFSET) { \ 721 *(.BTF_ids) \ 722 } 723 #else 724 #define BTF 725 #endif 726 727 /* 728 * Init task 729 */ 730 #define INIT_TASK_DATA_SECTION(align) \ 731 . = ALIGN(align); \ 732 .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \ 733 INIT_TASK_DATA(align) \ 734 } 735 736 #ifdef CONFIG_CONSTRUCTORS 737 #define KERNEL_CTORS() . = ALIGN(8); \ 738 __ctors_start = .; \ 739 KEEP(*(SORT(.ctors.*))) \ 740 KEEP(*(.ctors)) \ 741 KEEP(*(SORT(.init_array.*))) \ 742 KEEP(*(.init_array)) \ 743 __ctors_end = .; 744 #else 745 #define KERNEL_CTORS() 746 #endif 747 748 /* init and exit section handling */ 749 #define INIT_DATA \ 750 KEEP(*(SORT(___kentry+*))) \ 751 *(.init.data init.data.*) \ 752 MEM_DISCARD(init.data*) \ 753 KERNEL_CTORS() \ 754 MCOUNT_REC() \ 755 *(.init.rodata .init.rodata.*) \ 756 FTRACE_EVENTS() \ 757 TRACE_SYSCALLS() \ 758 KPROBE_BLACKLIST() \ 759 ERROR_INJECT_WHITELIST() \ 760 MEM_DISCARD(init.rodata) \ 761 CLK_OF_TABLES() \ 762 RESERVEDMEM_OF_TABLES() \ 763 TIMER_OF_TABLES() \ 764 CPU_METHOD_OF_TABLES() \ 765 CPUIDLE_METHOD_OF_TABLES() \ 766 KERNEL_DTB() \ 767 IRQCHIP_OF_MATCH_TABLE() \ 768 ACPI_PROBE_TABLE(irqchip) \ 769 ACPI_PROBE_TABLE(timer) \ 770 THERMAL_TABLE(governor) \ 771 DTPM_TABLE() \ 772 EARLYCON_TABLE() \ 773 LSM_TABLE() \ 774 EARLY_LSM_TABLE() \ 775 KUNIT_TABLE() 776 777 #define INIT_TEXT \ 778 *(.init.text .init.text.*) \ 779 *(.text.startup) \ 780 MEM_DISCARD(init.text*) 781 782 #define EXIT_DATA \ 783 *(.exit.data .exit.data.*) \ 784 *(.fini_array .fini_array.*) \ 785 *(.dtors .dtors.*) \ 786 MEM_DISCARD(exit.data*) \ 787 MEM_DISCARD(exit.rodata*) 788 789 #define EXIT_TEXT \ 790 *(.exit.text) \ 791 *(.text.exit) \ 792 MEM_DISCARD(exit.text) 793 794 #define EXIT_CALL \ 795 *(.exitcall.exit) 796 797 /* 798 * bss (Block Started by Symbol) - uninitialized data 799 * zeroed during startup 800 */ 801 #define SBSS(sbss_align) \ 802 . = ALIGN(sbss_align); \ 803 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \ 804 *(.dynsbss) \ 805 *(SBSS_MAIN) \ 806 *(.scommon) \ 807 } 808 809 /* 810 * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra 811 * sections to the front of bss. 812 */ 813 #ifndef BSS_FIRST_SECTIONS 814 #define BSS_FIRST_SECTIONS 815 #endif 816 817 #define BSS(bss_align) \ 818 . = ALIGN(bss_align); \ 819 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \ 820 BSS_FIRST_SECTIONS \ 821 . = ALIGN(PAGE_SIZE); \ 822 *(.bss..page_aligned) \ 823 . = ALIGN(PAGE_SIZE); \ 824 *(.dynbss) \ 825 *(BSS_MAIN) \ 826 *(COMMON) \ 827 } 828 829 /* 830 * Keep .eh_frame with CFI. 831 */ 832 #ifdef CONFIG_CFI_CLANG 833 #define EH_FRAME .eh_frame : { *(.eh_frame) } 834 #else 835 #define EH_FRAME 836 #endif 837 838 /* 839 * DWARF debug sections. 840 * Symbols in the DWARF debugging sections are relative to 841 * the beginning of the section so we begin them at 0. 842 */ 843 #define DWARF_DEBUG \ 844 EH_FRAME \ 845 /* DWARF 1 */ \ 846 .debug 0 : { *(.debug) } \ 847 .line 0 : { *(.line) } \ 848 /* GNU DWARF 1 extensions */ \ 849 .debug_srcinfo 0 : { *(.debug_srcinfo) } \ 850 .debug_sfnames 0 : { *(.debug_sfnames) } \ 851 /* DWARF 1.1 and DWARF 2 */ \ 852 .debug_aranges 0 : { *(.debug_aranges) } \ 853 .debug_pubnames 0 : { *(.debug_pubnames) } \ 854 /* DWARF 2 */ \ 855 .debug_info 0 : { *(.debug_info \ 856 .gnu.linkonce.wi.*) } \ 857 .debug_abbrev 0 : { *(.debug_abbrev) } \ 858 .debug_line 0 : { *(.debug_line) } \ 859 .debug_frame 0 : { *(.debug_frame) } \ 860 .debug_str 0 : { *(.debug_str) } \ 861 .debug_loc 0 : { *(.debug_loc) } \ 862 .debug_macinfo 0 : { *(.debug_macinfo) } \ 863 .debug_pubtypes 0 : { *(.debug_pubtypes) } \ 864 /* DWARF 3 */ \ 865 .debug_ranges 0 : { *(.debug_ranges) } \ 866 /* SGI/MIPS DWARF 2 extensions */ \ 867 .debug_weaknames 0 : { *(.debug_weaknames) } \ 868 .debug_funcnames 0 : { *(.debug_funcnames) } \ 869 .debug_typenames 0 : { *(.debug_typenames) } \ 870 .debug_varnames 0 : { *(.debug_varnames) } \ 871 /* GNU DWARF 2 extensions */ \ 872 .debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) } \ 873 .debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) } \ 874 /* DWARF 4 */ \ 875 .debug_types 0 : { *(.debug_types) } \ 876 /* DWARF 5 */ \ 877 .debug_addr 0 : { *(.debug_addr) } \ 878 .debug_line_str 0 : { *(.debug_line_str) } \ 879 .debug_loclists 0 : { *(.debug_loclists) } \ 880 .debug_macro 0 : { *(.debug_macro) } \ 881 .debug_names 0 : { *(.debug_names) } \ 882 .debug_rnglists 0 : { *(.debug_rnglists) } \ 883 .debug_str_offsets 0 : { *(.debug_str_offsets) } 884 885 /* Stabs debugging sections. */ 886 #define STABS_DEBUG \ 887 .stab 0 : { *(.stab) } \ 888 .stabstr 0 : { *(.stabstr) } \ 889 .stab.excl 0 : { *(.stab.excl) } \ 890 .stab.exclstr 0 : { *(.stab.exclstr) } \ 891 .stab.index 0 : { *(.stab.index) } \ 892 .stab.indexstr 0 : { *(.stab.indexstr) } 893 894 /* Required sections not related to debugging. */ 895 #define ELF_DETAILS \ 896 .comment 0 : { *(.comment) } \ 897 .symtab 0 : { *(.symtab) } \ 898 .strtab 0 : { *(.strtab) } \ 899 .shstrtab 0 : { *(.shstrtab) } 900 901 #ifdef CONFIG_GENERIC_BUG 902 #define BUG_TABLE \ 903 . = ALIGN(8); \ 904 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \ 905 __start___bug_table = .; \ 906 KEEP(*(__bug_table)) \ 907 __stop___bug_table = .; \ 908 } 909 #else 910 #define BUG_TABLE 911 #endif 912 913 #ifdef CONFIG_UNWINDER_ORC 914 #define ORC_UNWIND_TABLE \ 915 . = ALIGN(4); \ 916 .orc_unwind_ip : AT(ADDR(.orc_unwind_ip) - LOAD_OFFSET) { \ 917 __start_orc_unwind_ip = .; \ 918 KEEP(*(.orc_unwind_ip)) \ 919 __stop_orc_unwind_ip = .; \ 920 } \ 921 . = ALIGN(2); \ 922 .orc_unwind : AT(ADDR(.orc_unwind) - LOAD_OFFSET) { \ 923 __start_orc_unwind = .; \ 924 KEEP(*(.orc_unwind)) \ 925 __stop_orc_unwind = .; \ 926 } \ 927 . = ALIGN(4); \ 928 .orc_lookup : AT(ADDR(.orc_lookup) - LOAD_OFFSET) { \ 929 orc_lookup = .; \ 930 . += (((SIZEOF(.text) + LOOKUP_BLOCK_SIZE - 1) / \ 931 LOOKUP_BLOCK_SIZE) + 1) * 4; \ 932 orc_lookup_end = .; \ 933 } 934 #else 935 #define ORC_UNWIND_TABLE 936 #endif 937 938 #ifdef CONFIG_PM_TRACE 939 #define TRACEDATA \ 940 . = ALIGN(4); \ 941 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \ 942 __tracedata_start = .; \ 943 KEEP(*(.tracedata)) \ 944 __tracedata_end = .; \ 945 } 946 #else 947 #define TRACEDATA 948 #endif 949 950 /* 951 * Discard .note.GNU-stack, which is emitted as PROGBITS by the compiler. 952 * Otherwise, the type of .notes section would become PROGBITS instead of NOTES. 953 */ 954 #define NOTES \ 955 /DISCARD/ : { *(.note.GNU-stack) } \ 956 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \ 957 __start_notes = .; \ 958 KEEP(*(.note.*)) \ 959 __stop_notes = .; \ 960 } NOTES_HEADERS \ 961 NOTES_HEADERS_RESTORE 962 963 #define INIT_SETUP(initsetup_align) \ 964 . = ALIGN(initsetup_align); \ 965 __setup_start = .; \ 966 KEEP(*(.init.setup)) \ 967 __setup_end = .; 968 969 #define INIT_CALLS_LEVEL(level) \ 970 __initcall##level##_start = .; \ 971 KEEP(*(.initcall##level##.init)) \ 972 KEEP(*(.initcall##level##s.init)) \ 973 974 #define INIT_CALLS \ 975 __initcall_start = .; \ 976 KEEP(*(.initcallearly.init)) \ 977 INIT_CALLS_LEVEL(0) \ 978 INIT_CALLS_LEVEL(1) \ 979 INIT_CALLS_LEVEL(2) \ 980 INIT_CALLS_LEVEL(3) \ 981 INIT_CALLS_LEVEL(4) \ 982 INIT_CALLS_LEVEL(5) \ 983 INIT_CALLS_LEVEL(rootfs) \ 984 INIT_CALLS_LEVEL(6) \ 985 INIT_CALLS_LEVEL(7) \ 986 __initcall_end = .; 987 988 #define CON_INITCALL \ 989 __con_initcall_start = .; \ 990 KEEP(*(.con_initcall.init)) \ 991 __con_initcall_end = .; 992 993 /* Alignment must be consistent with (kunit_suite *) in include/kunit/test.h */ 994 #define KUNIT_TABLE() \ 995 . = ALIGN(8); \ 996 __kunit_suites_start = .; \ 997 KEEP(*(.kunit_test_suites)) \ 998 __kunit_suites_end = .; 999 1000 #ifdef CONFIG_BLK_DEV_INITRD 1001 #define INIT_RAM_FS \ 1002 . = ALIGN(4); \ 1003 __initramfs_start = .; \ 1004 KEEP(*(.init.ramfs)) \ 1005 . = ALIGN(8); \ 1006 KEEP(*(.init.ramfs.info)) 1007 #else 1008 #define INIT_RAM_FS 1009 #endif 1010 1011 /* 1012 * Memory encryption operates on a page basis. Since we need to clear 1013 * the memory encryption mask for this section, it needs to be aligned 1014 * on a page boundary and be a page-size multiple in length. 1015 * 1016 * Note: We use a separate section so that only this section gets 1017 * decrypted to avoid exposing more than we wish. 1018 */ 1019 #ifdef CONFIG_AMD_MEM_ENCRYPT 1020 #define PERCPU_DECRYPTED_SECTION \ 1021 . = ALIGN(PAGE_SIZE); \ 1022 *(.data..percpu..decrypted) \ 1023 . = ALIGN(PAGE_SIZE); 1024 #else 1025 #define PERCPU_DECRYPTED_SECTION 1026 #endif 1027 1028 1029 /* 1030 * Default discarded sections. 1031 * 1032 * Some archs want to discard exit text/data at runtime rather than 1033 * link time due to cross-section references such as alt instructions, 1034 * bug table, eh_frame, etc. DISCARDS must be the last of output 1035 * section definitions so that such archs put those in earlier section 1036 * definitions. 1037 */ 1038 #ifdef RUNTIME_DISCARD_EXIT 1039 #define EXIT_DISCARDS 1040 #else 1041 #define EXIT_DISCARDS \ 1042 EXIT_TEXT \ 1043 EXIT_DATA 1044 #endif 1045 1046 /* 1047 * Clang's -fprofile-arcs, -fsanitize=kernel-address, and 1048 * -fsanitize=thread produce unwanted sections (.eh_frame 1049 * and .init_array.*), but CONFIG_CONSTRUCTORS wants to 1050 * keep any .init_array.* sections. 1051 * https://bugs.llvm.org/show_bug.cgi?id=46478 1052 */ 1053 #if defined(CONFIG_GCOV_KERNEL) || defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KCSAN) 1054 # ifdef CONFIG_CONSTRUCTORS 1055 # define SANITIZER_DISCARDS \ 1056 *(.eh_frame) 1057 # else 1058 # define SANITIZER_DISCARDS \ 1059 *(.init_array) *(.init_array.*) \ 1060 *(.eh_frame) 1061 # endif 1062 #else 1063 # define SANITIZER_DISCARDS 1064 #endif 1065 1066 #define COMMON_DISCARDS \ 1067 SANITIZER_DISCARDS \ 1068 *(.discard) \ 1069 *(.discard.*) \ 1070 *(.modinfo) \ 1071 /* ld.bfd warns about .gnu.version* even when not emitted */ \ 1072 *(.gnu.version*) \ 1073 1074 #define DISCARDS \ 1075 /DISCARD/ : { \ 1076 EXIT_DISCARDS \ 1077 EXIT_CALL \ 1078 COMMON_DISCARDS \ 1079 } 1080 1081 /** 1082 * PERCPU_INPUT - the percpu input sections 1083 * @cacheline: cacheline size 1084 * 1085 * The core percpu section names and core symbols which do not rely 1086 * directly upon load addresses. 1087 * 1088 * @cacheline is used to align subsections to avoid false cacheline 1089 * sharing between subsections for different purposes. 1090 */ 1091 #define PERCPU_INPUT(cacheline) \ 1092 __per_cpu_start = .; \ 1093 *(.data..percpu..first) \ 1094 . = ALIGN(PAGE_SIZE); \ 1095 *(.data..percpu..page_aligned) \ 1096 . = ALIGN(cacheline); \ 1097 *(.data..percpu..read_mostly) \ 1098 . = ALIGN(cacheline); \ 1099 *(.data..percpu) \ 1100 *(.data..percpu..shared_aligned) \ 1101 PERCPU_DECRYPTED_SECTION \ 1102 __per_cpu_end = .; 1103 1104 /** 1105 * PERCPU_VADDR - define output section for percpu area 1106 * @cacheline: cacheline size 1107 * @vaddr: explicit base address (optional) 1108 * @phdr: destination PHDR (optional) 1109 * 1110 * Macro which expands to output section for percpu area. 1111 * 1112 * @cacheline is used to align subsections to avoid false cacheline 1113 * sharing between subsections for different purposes. 1114 * 1115 * If @vaddr is not blank, it specifies explicit base address and all 1116 * percpu symbols will be offset from the given address. If blank, 1117 * @vaddr always equals @laddr + LOAD_OFFSET. 1118 * 1119 * @phdr defines the output PHDR to use if not blank. Be warned that 1120 * output PHDR is sticky. If @phdr is specified, the next output 1121 * section in the linker script will go there too. @phdr should have 1122 * a leading colon. 1123 * 1124 * Note that this macros defines __per_cpu_load as an absolute symbol. 1125 * If there is no need to put the percpu section at a predetermined 1126 * address, use PERCPU_SECTION. 1127 */ 1128 #define PERCPU_VADDR(cacheline, vaddr, phdr) \ 1129 __per_cpu_load = .; \ 1130 .data..percpu vaddr : AT(__per_cpu_load - LOAD_OFFSET) { \ 1131 PERCPU_INPUT(cacheline) \ 1132 } phdr \ 1133 . = __per_cpu_load + SIZEOF(.data..percpu); 1134 1135 /** 1136 * PERCPU_SECTION - define output section for percpu area, simple version 1137 * @cacheline: cacheline size 1138 * 1139 * Align to PAGE_SIZE and outputs output section for percpu area. This 1140 * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and 1141 * __per_cpu_start will be identical. 1142 * 1143 * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,) 1144 * except that __per_cpu_load is defined as a relative symbol against 1145 * .data..percpu which is required for relocatable x86_32 configuration. 1146 */ 1147 #define PERCPU_SECTION(cacheline) \ 1148 . = ALIGN(PAGE_SIZE); \ 1149 .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \ 1150 __per_cpu_load = .; \ 1151 PERCPU_INPUT(cacheline) \ 1152 } 1153 1154 1155 /* 1156 * Definition of the high level *_SECTION macros 1157 * They will fit only a subset of the architectures 1158 */ 1159 1160 1161 /* 1162 * Writeable data. 1163 * All sections are combined in a single .data section. 1164 * The sections following CONSTRUCTORS are arranged so their 1165 * typical alignment matches. 1166 * A cacheline is typical/always less than a PAGE_SIZE so 1167 * the sections that has this restriction (or similar) 1168 * is located before the ones requiring PAGE_SIZE alignment. 1169 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which 1170 * matches the requirement of PAGE_ALIGNED_DATA. 1171 * 1172 * use 0 as page_align if page_aligned data is not used */ 1173 #define RW_DATA(cacheline, pagealigned, inittask) \ 1174 . = ALIGN(PAGE_SIZE); \ 1175 .data : AT(ADDR(.data) - LOAD_OFFSET) { \ 1176 INIT_TASK_DATA(inittask) \ 1177 NOSAVE_DATA \ 1178 PAGE_ALIGNED_DATA(pagealigned) \ 1179 CACHELINE_ALIGNED_DATA(cacheline) \ 1180 READ_MOSTLY_DATA(cacheline) \ 1181 DATA_DATA \ 1182 CONSTRUCTORS \ 1183 } \ 1184 BUG_TABLE \ 1185 1186 #define INIT_TEXT_SECTION(inittext_align) \ 1187 . = ALIGN(inittext_align); \ 1188 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \ 1189 _sinittext = .; \ 1190 INIT_TEXT \ 1191 _einittext = .; \ 1192 } 1193 1194 #define INIT_DATA_SECTION(initsetup_align) \ 1195 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \ 1196 INIT_DATA \ 1197 INIT_SETUP(initsetup_align) \ 1198 INIT_CALLS \ 1199 CON_INITCALL \ 1200 INIT_RAM_FS \ 1201 } 1202 1203 #define BSS_SECTION(sbss_align, bss_align, stop_align) \ 1204 . = ALIGN(sbss_align); \ 1205 __bss_start = .; \ 1206 SBSS(sbss_align) \ 1207 BSS(bss_align) \ 1208 . = ALIGN(stop_align); \ 1209 __bss_stop = .; 1210