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