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(PAGE_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 * [_stext, _etext] is the text section 44 * [_sdata, _edata] is the data section 45 * 46 * Some of the included output section have their own set of constants. 47 * Examples are: [__initramfs_start, __initramfs_end] for initramfs and 48 * [__nosave_begin, __nosave_end] for the nosave data 49 */ 50 51 #ifndef LOAD_OFFSET 52 #define LOAD_OFFSET 0 53 #endif 54 55 #ifndef SYMBOL_PREFIX 56 #define VMLINUX_SYMBOL(sym) sym 57 #else 58 #define PASTE2(x,y) x##y 59 #define PASTE(x,y) PASTE2(x,y) 60 #define VMLINUX_SYMBOL(sym) PASTE(SYMBOL_PREFIX, sym) 61 #endif 62 63 /* Align . to a 8 byte boundary equals to maximum function alignment. */ 64 #define ALIGN_FUNCTION() . = ALIGN(8) 65 66 /* 67 * Align to a 32 byte boundary equal to the 68 * alignment gcc 4.5 uses for a struct 69 */ 70 #define STRUCT_ALIGNMENT 32 71 #define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT) 72 73 /* The actual configuration determine if the init/exit sections 74 * are handled as text/data or they can be discarded (which 75 * often happens at runtime) 76 */ 77 #ifdef CONFIG_HOTPLUG 78 #define DEV_KEEP(sec) *(.dev##sec) 79 #define DEV_DISCARD(sec) 80 #else 81 #define DEV_KEEP(sec) 82 #define DEV_DISCARD(sec) *(.dev##sec) 83 #endif 84 85 #ifdef CONFIG_HOTPLUG_CPU 86 #define CPU_KEEP(sec) *(.cpu##sec) 87 #define CPU_DISCARD(sec) 88 #else 89 #define CPU_KEEP(sec) 90 #define CPU_DISCARD(sec) *(.cpu##sec) 91 #endif 92 93 #if defined(CONFIG_MEMORY_HOTPLUG) 94 #define MEM_KEEP(sec) *(.mem##sec) 95 #define MEM_DISCARD(sec) 96 #else 97 #define MEM_KEEP(sec) 98 #define MEM_DISCARD(sec) *(.mem##sec) 99 #endif 100 101 #ifdef CONFIG_FTRACE_MCOUNT_RECORD 102 #define MCOUNT_REC() . = ALIGN(8); \ 103 VMLINUX_SYMBOL(__start_mcount_loc) = .; \ 104 *(__mcount_loc) \ 105 VMLINUX_SYMBOL(__stop_mcount_loc) = .; 106 #else 107 #define MCOUNT_REC() 108 #endif 109 110 #ifdef CONFIG_TRACE_BRANCH_PROFILING 111 #define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \ 112 *(_ftrace_annotated_branch) \ 113 VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .; 114 #else 115 #define LIKELY_PROFILE() 116 #endif 117 118 #ifdef CONFIG_PROFILE_ALL_BRANCHES 119 #define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \ 120 *(_ftrace_branch) \ 121 VMLINUX_SYMBOL(__stop_branch_profile) = .; 122 #else 123 #define BRANCH_PROFILE() 124 #endif 125 126 #ifdef CONFIG_EVENT_TRACING 127 #define FTRACE_EVENTS() VMLINUX_SYMBOL(__start_ftrace_events) = .; \ 128 *(_ftrace_events) \ 129 VMLINUX_SYMBOL(__stop_ftrace_events) = .; 130 #else 131 #define FTRACE_EVENTS() 132 #endif 133 134 #ifdef CONFIG_TRACING 135 #define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \ 136 *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \ 137 VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .; 138 #else 139 #define TRACE_PRINTKS() 140 #endif 141 142 #ifdef CONFIG_FTRACE_SYSCALLS 143 #define TRACE_SYSCALLS() VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \ 144 *(__syscalls_metadata) \ 145 VMLINUX_SYMBOL(__stop_syscalls_metadata) = .; 146 #else 147 #define TRACE_SYSCALLS() 148 #endif 149 150 151 #define KERNEL_DTB() \ 152 STRUCT_ALIGN(); \ 153 VMLINUX_SYMBOL(__dtb_start) = .; \ 154 *(.dtb.init.rodata) \ 155 VMLINUX_SYMBOL(__dtb_end) = .; 156 157 /* .data section */ 158 #define DATA_DATA \ 159 *(.data) \ 160 *(.ref.data) \ 161 *(.data..shared_aligned) /* percpu related */ \ 162 DEV_KEEP(init.data) \ 163 DEV_KEEP(exit.data) \ 164 CPU_KEEP(init.data) \ 165 CPU_KEEP(exit.data) \ 166 MEM_KEEP(init.data) \ 167 MEM_KEEP(exit.data) \ 168 . = ALIGN(32); \ 169 VMLINUX_SYMBOL(__start___tracepoints) = .; \ 170 *(__tracepoints) \ 171 VMLINUX_SYMBOL(__stop___tracepoints) = .; \ 172 /* implement dynamic printk debug */ \ 173 . = ALIGN(8); \ 174 VMLINUX_SYMBOL(__start___verbose) = .; \ 175 *(__verbose) \ 176 VMLINUX_SYMBOL(__stop___verbose) = .; \ 177 LIKELY_PROFILE() \ 178 BRANCH_PROFILE() \ 179 TRACE_PRINTKS() \ 180 \ 181 STRUCT_ALIGN(); \ 182 FTRACE_EVENTS() \ 183 \ 184 STRUCT_ALIGN(); \ 185 TRACE_SYSCALLS() 186 187 /* 188 * Data section helpers 189 */ 190 #define NOSAVE_DATA \ 191 . = ALIGN(PAGE_SIZE); \ 192 VMLINUX_SYMBOL(__nosave_begin) = .; \ 193 *(.data..nosave) \ 194 . = ALIGN(PAGE_SIZE); \ 195 VMLINUX_SYMBOL(__nosave_end) = .; 196 197 #define PAGE_ALIGNED_DATA(page_align) \ 198 . = ALIGN(page_align); \ 199 *(.data..page_aligned) 200 201 #define READ_MOSTLY_DATA(align) \ 202 . = ALIGN(align); \ 203 *(.data..read_mostly) 204 205 #define CACHELINE_ALIGNED_DATA(align) \ 206 . = ALIGN(align); \ 207 *(.data..cacheline_aligned) 208 209 #define INIT_TASK_DATA(align) \ 210 . = ALIGN(align); \ 211 *(.data..init_task) 212 213 /* 214 * Read only Data 215 */ 216 #define RO_DATA_SECTION(align) \ 217 . = ALIGN((align)); \ 218 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \ 219 VMLINUX_SYMBOL(__start_rodata) = .; \ 220 *(.rodata) *(.rodata.*) \ 221 *(__vermagic) /* Kernel version magic */ \ 222 *(__markers_strings) /* Markers: strings */ \ 223 *(__tracepoints_strings)/* Tracepoints: strings */ \ 224 } \ 225 \ 226 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \ 227 *(.rodata1) \ 228 } \ 229 \ 230 BUG_TABLE \ 231 \ 232 JUMP_TABLE \ 233 \ 234 /* PCI quirks */ \ 235 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \ 236 VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \ 237 *(.pci_fixup_early) \ 238 VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \ 239 VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \ 240 *(.pci_fixup_header) \ 241 VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \ 242 VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \ 243 *(.pci_fixup_final) \ 244 VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \ 245 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \ 246 *(.pci_fixup_enable) \ 247 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \ 248 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \ 249 *(.pci_fixup_resume) \ 250 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \ 251 VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \ 252 *(.pci_fixup_resume_early) \ 253 VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \ 254 VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \ 255 *(.pci_fixup_suspend) \ 256 VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \ 257 } \ 258 \ 259 /* Built-in firmware blobs */ \ 260 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \ 261 VMLINUX_SYMBOL(__start_builtin_fw) = .; \ 262 *(.builtin_fw) \ 263 VMLINUX_SYMBOL(__end_builtin_fw) = .; \ 264 } \ 265 \ 266 /* RapidIO route ops */ \ 267 .rio_ops : AT(ADDR(.rio_ops) - LOAD_OFFSET) { \ 268 VMLINUX_SYMBOL(__start_rio_switch_ops) = .; \ 269 *(.rio_switch_ops) \ 270 VMLINUX_SYMBOL(__end_rio_switch_ops) = .; \ 271 } \ 272 \ 273 TRACEDATA \ 274 \ 275 /* Kernel symbol table: Normal symbols */ \ 276 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \ 277 VMLINUX_SYMBOL(__start___ksymtab) = .; \ 278 *(__ksymtab) \ 279 VMLINUX_SYMBOL(__stop___ksymtab) = .; \ 280 } \ 281 \ 282 /* Kernel symbol table: GPL-only symbols */ \ 283 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \ 284 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \ 285 *(__ksymtab_gpl) \ 286 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \ 287 } \ 288 \ 289 /* Kernel symbol table: Normal unused symbols */ \ 290 __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \ 291 VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \ 292 *(__ksymtab_unused) \ 293 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \ 294 } \ 295 \ 296 /* Kernel symbol table: GPL-only unused symbols */ \ 297 __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \ 298 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \ 299 *(__ksymtab_unused_gpl) \ 300 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \ 301 } \ 302 \ 303 /* Kernel symbol table: GPL-future-only symbols */ \ 304 __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \ 305 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \ 306 *(__ksymtab_gpl_future) \ 307 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \ 308 } \ 309 \ 310 /* Kernel symbol table: Normal symbols */ \ 311 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \ 312 VMLINUX_SYMBOL(__start___kcrctab) = .; \ 313 *(__kcrctab) \ 314 VMLINUX_SYMBOL(__stop___kcrctab) = .; \ 315 } \ 316 \ 317 /* Kernel symbol table: GPL-only symbols */ \ 318 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \ 319 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \ 320 *(__kcrctab_gpl) \ 321 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \ 322 } \ 323 \ 324 /* Kernel symbol table: Normal unused symbols */ \ 325 __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \ 326 VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \ 327 *(__kcrctab_unused) \ 328 VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \ 329 } \ 330 \ 331 /* Kernel symbol table: GPL-only unused symbols */ \ 332 __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \ 333 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \ 334 *(__kcrctab_unused_gpl) \ 335 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \ 336 } \ 337 \ 338 /* Kernel symbol table: GPL-future-only symbols */ \ 339 __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \ 340 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \ 341 *(__kcrctab_gpl_future) \ 342 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \ 343 } \ 344 \ 345 /* Kernel symbol table: strings */ \ 346 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \ 347 *(__ksymtab_strings) \ 348 } \ 349 \ 350 /* __*init sections */ \ 351 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \ 352 *(.ref.rodata) \ 353 DEV_KEEP(init.rodata) \ 354 DEV_KEEP(exit.rodata) \ 355 CPU_KEEP(init.rodata) \ 356 CPU_KEEP(exit.rodata) \ 357 MEM_KEEP(init.rodata) \ 358 MEM_KEEP(exit.rodata) \ 359 } \ 360 \ 361 /* Built-in module parameters. */ \ 362 __param : AT(ADDR(__param) - LOAD_OFFSET) { \ 363 VMLINUX_SYMBOL(__start___param) = .; \ 364 *(__param) \ 365 VMLINUX_SYMBOL(__stop___param) = .; \ 366 . = ALIGN((align)); \ 367 VMLINUX_SYMBOL(__end_rodata) = .; \ 368 } \ 369 . = ALIGN((align)); 370 371 /* RODATA & RO_DATA provided for backward compatibility. 372 * All archs are supposed to use RO_DATA() */ 373 #define RODATA RO_DATA_SECTION(4096) 374 #define RO_DATA(align) RO_DATA_SECTION(align) 375 376 #define SECURITY_INIT \ 377 .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \ 378 VMLINUX_SYMBOL(__security_initcall_start) = .; \ 379 *(.security_initcall.init) \ 380 VMLINUX_SYMBOL(__security_initcall_end) = .; \ 381 } 382 383 /* .text section. Map to function alignment to avoid address changes 384 * during second ld run in second ld pass when generating System.map */ 385 #define TEXT_TEXT \ 386 ALIGN_FUNCTION(); \ 387 *(.text.hot) \ 388 *(.text) \ 389 *(.ref.text) \ 390 DEV_KEEP(init.text) \ 391 DEV_KEEP(exit.text) \ 392 CPU_KEEP(init.text) \ 393 CPU_KEEP(exit.text) \ 394 MEM_KEEP(init.text) \ 395 MEM_KEEP(exit.text) \ 396 *(.text.unlikely) 397 398 399 /* sched.text is aling to function alignment to secure we have same 400 * address even at second ld pass when generating System.map */ 401 #define SCHED_TEXT \ 402 ALIGN_FUNCTION(); \ 403 VMLINUX_SYMBOL(__sched_text_start) = .; \ 404 *(.sched.text) \ 405 VMLINUX_SYMBOL(__sched_text_end) = .; 406 407 /* spinlock.text is aling to function alignment to secure we have same 408 * address even at second ld pass when generating System.map */ 409 #define LOCK_TEXT \ 410 ALIGN_FUNCTION(); \ 411 VMLINUX_SYMBOL(__lock_text_start) = .; \ 412 *(.spinlock.text) \ 413 VMLINUX_SYMBOL(__lock_text_end) = .; 414 415 #define KPROBES_TEXT \ 416 ALIGN_FUNCTION(); \ 417 VMLINUX_SYMBOL(__kprobes_text_start) = .; \ 418 *(.kprobes.text) \ 419 VMLINUX_SYMBOL(__kprobes_text_end) = .; 420 421 #ifdef CONFIG_FUNCTION_GRAPH_TRACER 422 #define IRQENTRY_TEXT \ 423 ALIGN_FUNCTION(); \ 424 VMLINUX_SYMBOL(__irqentry_text_start) = .; \ 425 *(.irqentry.text) \ 426 VMLINUX_SYMBOL(__irqentry_text_end) = .; 427 #else 428 #define IRQENTRY_TEXT 429 #endif 430 431 /* Section used for early init (in .S files) */ 432 #define HEAD_TEXT *(.head.text) 433 434 #define HEAD_TEXT_SECTION \ 435 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \ 436 HEAD_TEXT \ 437 } 438 439 /* 440 * Exception table 441 */ 442 #define EXCEPTION_TABLE(align) \ 443 . = ALIGN(align); \ 444 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \ 445 VMLINUX_SYMBOL(__start___ex_table) = .; \ 446 *(__ex_table) \ 447 VMLINUX_SYMBOL(__stop___ex_table) = .; \ 448 } 449 450 /* 451 * Init task 452 */ 453 #define INIT_TASK_DATA_SECTION(align) \ 454 . = ALIGN(align); \ 455 .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \ 456 INIT_TASK_DATA(align) \ 457 } 458 459 #ifdef CONFIG_CONSTRUCTORS 460 #define KERNEL_CTORS() . = ALIGN(8); \ 461 VMLINUX_SYMBOL(__ctors_start) = .; \ 462 *(.ctors) \ 463 VMLINUX_SYMBOL(__ctors_end) = .; 464 #else 465 #define KERNEL_CTORS() 466 #endif 467 468 /* init and exit section handling */ 469 #define INIT_DATA \ 470 *(.init.data) \ 471 DEV_DISCARD(init.data) \ 472 CPU_DISCARD(init.data) \ 473 MEM_DISCARD(init.data) \ 474 KERNEL_CTORS() \ 475 *(.init.rodata) \ 476 MCOUNT_REC() \ 477 DEV_DISCARD(init.rodata) \ 478 CPU_DISCARD(init.rodata) \ 479 MEM_DISCARD(init.rodata) \ 480 KERNEL_DTB() 481 482 #define INIT_TEXT \ 483 *(.init.text) \ 484 DEV_DISCARD(init.text) \ 485 CPU_DISCARD(init.text) \ 486 MEM_DISCARD(init.text) 487 488 #define EXIT_DATA \ 489 *(.exit.data) \ 490 DEV_DISCARD(exit.data) \ 491 DEV_DISCARD(exit.rodata) \ 492 CPU_DISCARD(exit.data) \ 493 CPU_DISCARD(exit.rodata) \ 494 MEM_DISCARD(exit.data) \ 495 MEM_DISCARD(exit.rodata) 496 497 #define EXIT_TEXT \ 498 *(.exit.text) \ 499 DEV_DISCARD(exit.text) \ 500 CPU_DISCARD(exit.text) \ 501 MEM_DISCARD(exit.text) 502 503 #define EXIT_CALL \ 504 *(.exitcall.exit) 505 506 /* 507 * bss (Block Started by Symbol) - uninitialized data 508 * zeroed during startup 509 */ 510 #define SBSS(sbss_align) \ 511 . = ALIGN(sbss_align); \ 512 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \ 513 *(.sbss) \ 514 *(.scommon) \ 515 } 516 517 #define BSS(bss_align) \ 518 . = ALIGN(bss_align); \ 519 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \ 520 *(.bss..page_aligned) \ 521 *(.dynbss) \ 522 *(.bss) \ 523 *(COMMON) \ 524 } 525 526 /* 527 * DWARF debug sections. 528 * Symbols in the DWARF debugging sections are relative to 529 * the beginning of the section so we begin them at 0. 530 */ 531 #define DWARF_DEBUG \ 532 /* DWARF 1 */ \ 533 .debug 0 : { *(.debug) } \ 534 .line 0 : { *(.line) } \ 535 /* GNU DWARF 1 extensions */ \ 536 .debug_srcinfo 0 : { *(.debug_srcinfo) } \ 537 .debug_sfnames 0 : { *(.debug_sfnames) } \ 538 /* DWARF 1.1 and DWARF 2 */ \ 539 .debug_aranges 0 : { *(.debug_aranges) } \ 540 .debug_pubnames 0 : { *(.debug_pubnames) } \ 541 /* DWARF 2 */ \ 542 .debug_info 0 : { *(.debug_info \ 543 .gnu.linkonce.wi.*) } \ 544 .debug_abbrev 0 : { *(.debug_abbrev) } \ 545 .debug_line 0 : { *(.debug_line) } \ 546 .debug_frame 0 : { *(.debug_frame) } \ 547 .debug_str 0 : { *(.debug_str) } \ 548 .debug_loc 0 : { *(.debug_loc) } \ 549 .debug_macinfo 0 : { *(.debug_macinfo) } \ 550 /* SGI/MIPS DWARF 2 extensions */ \ 551 .debug_weaknames 0 : { *(.debug_weaknames) } \ 552 .debug_funcnames 0 : { *(.debug_funcnames) } \ 553 .debug_typenames 0 : { *(.debug_typenames) } \ 554 .debug_varnames 0 : { *(.debug_varnames) } \ 555 556 /* Stabs debugging sections. */ 557 #define STABS_DEBUG \ 558 .stab 0 : { *(.stab) } \ 559 .stabstr 0 : { *(.stabstr) } \ 560 .stab.excl 0 : { *(.stab.excl) } \ 561 .stab.exclstr 0 : { *(.stab.exclstr) } \ 562 .stab.index 0 : { *(.stab.index) } \ 563 .stab.indexstr 0 : { *(.stab.indexstr) } \ 564 .comment 0 : { *(.comment) } 565 566 #ifdef CONFIG_GENERIC_BUG 567 #define BUG_TABLE \ 568 . = ALIGN(8); \ 569 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \ 570 VMLINUX_SYMBOL(__start___bug_table) = .; \ 571 *(__bug_table) \ 572 VMLINUX_SYMBOL(__stop___bug_table) = .; \ 573 } 574 #else 575 #define BUG_TABLE 576 #endif 577 578 #define JUMP_TABLE \ 579 . = ALIGN(8); \ 580 __jump_table : AT(ADDR(__jump_table) - LOAD_OFFSET) { \ 581 VMLINUX_SYMBOL(__start___jump_table) = .; \ 582 *(__jump_table) \ 583 VMLINUX_SYMBOL(__stop___jump_table) = .; \ 584 } 585 586 #ifdef CONFIG_PM_TRACE 587 #define TRACEDATA \ 588 . = ALIGN(4); \ 589 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \ 590 VMLINUX_SYMBOL(__tracedata_start) = .; \ 591 *(.tracedata) \ 592 VMLINUX_SYMBOL(__tracedata_end) = .; \ 593 } 594 #else 595 #define TRACEDATA 596 #endif 597 598 #define NOTES \ 599 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \ 600 VMLINUX_SYMBOL(__start_notes) = .; \ 601 *(.note.*) \ 602 VMLINUX_SYMBOL(__stop_notes) = .; \ 603 } 604 605 #define INIT_SETUP(initsetup_align) \ 606 . = ALIGN(initsetup_align); \ 607 VMLINUX_SYMBOL(__setup_start) = .; \ 608 *(.init.setup) \ 609 VMLINUX_SYMBOL(__setup_end) = .; 610 611 #define INITCALLS \ 612 *(.initcallearly.init) \ 613 VMLINUX_SYMBOL(__early_initcall_end) = .; \ 614 *(.initcall0.init) \ 615 *(.initcall0s.init) \ 616 *(.initcall1.init) \ 617 *(.initcall1s.init) \ 618 *(.initcall2.init) \ 619 *(.initcall2s.init) \ 620 *(.initcall3.init) \ 621 *(.initcall3s.init) \ 622 *(.initcall4.init) \ 623 *(.initcall4s.init) \ 624 *(.initcall5.init) \ 625 *(.initcall5s.init) \ 626 *(.initcallrootfs.init) \ 627 *(.initcall6.init) \ 628 *(.initcall6s.init) \ 629 *(.initcall7.init) \ 630 *(.initcall7s.init) 631 632 #define INIT_CALLS \ 633 VMLINUX_SYMBOL(__initcall_start) = .; \ 634 INITCALLS \ 635 VMLINUX_SYMBOL(__initcall_end) = .; 636 637 #define CON_INITCALL \ 638 VMLINUX_SYMBOL(__con_initcall_start) = .; \ 639 *(.con_initcall.init) \ 640 VMLINUX_SYMBOL(__con_initcall_end) = .; 641 642 #define SECURITY_INITCALL \ 643 VMLINUX_SYMBOL(__security_initcall_start) = .; \ 644 *(.security_initcall.init) \ 645 VMLINUX_SYMBOL(__security_initcall_end) = .; 646 647 #ifdef CONFIG_BLK_DEV_INITRD 648 #define INIT_RAM_FS \ 649 . = ALIGN(4); \ 650 VMLINUX_SYMBOL(__initramfs_start) = .; \ 651 *(.init.ramfs) \ 652 . = ALIGN(8); \ 653 *(.init.ramfs.info) 654 #else 655 #define INIT_RAM_FS 656 #endif 657 658 /* 659 * Default discarded sections. 660 * 661 * Some archs want to discard exit text/data at runtime rather than 662 * link time due to cross-section references such as alt instructions, 663 * bug table, eh_frame, etc. DISCARDS must be the last of output 664 * section definitions so that such archs put those in earlier section 665 * definitions. 666 */ 667 #define DISCARDS \ 668 /DISCARD/ : { \ 669 EXIT_TEXT \ 670 EXIT_DATA \ 671 EXIT_CALL \ 672 *(.discard) \ 673 *(.discard.*) \ 674 } 675 676 /** 677 * PERCPU_VADDR - define output section for percpu area 678 * @vaddr: explicit base address (optional) 679 * @phdr: destination PHDR (optional) 680 * 681 * Macro which expands to output section for percpu area. If @vaddr 682 * is not blank, it specifies explicit base address and all percpu 683 * symbols will be offset from the given address. If blank, @vaddr 684 * always equals @laddr + LOAD_OFFSET. 685 * 686 * @phdr defines the output PHDR to use if not blank. Be warned that 687 * output PHDR is sticky. If @phdr is specified, the next output 688 * section in the linker script will go there too. @phdr should have 689 * a leading colon. 690 * 691 * Note that this macros defines __per_cpu_load as an absolute symbol. 692 * If there is no need to put the percpu section at a predetermined 693 * address, use PERCPU(). 694 */ 695 #define PERCPU_VADDR(vaddr, phdr) \ 696 VMLINUX_SYMBOL(__per_cpu_load) = .; \ 697 .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \ 698 - LOAD_OFFSET) { \ 699 VMLINUX_SYMBOL(__per_cpu_start) = .; \ 700 *(.data..percpu..first) \ 701 . = ALIGN(PAGE_SIZE); \ 702 *(.data..percpu..page_aligned) \ 703 *(.data..percpu..readmostly) \ 704 *(.data..percpu) \ 705 *(.data..percpu..shared_aligned) \ 706 VMLINUX_SYMBOL(__per_cpu_end) = .; \ 707 } phdr \ 708 . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu); 709 710 /** 711 * PERCPU - define output section for percpu area, simple version 712 * @align: required alignment 713 * 714 * Align to @align and outputs output section for percpu area. This 715 * macro doesn't maniuplate @vaddr or @phdr and __per_cpu_load and 716 * __per_cpu_start will be identical. 717 * 718 * This macro is equivalent to ALIGN(align); PERCPU_VADDR( , ) except 719 * that __per_cpu_load is defined as a relative symbol against 720 * .data..percpu which is required for relocatable x86_32 721 * configuration. 722 */ 723 #define PERCPU(align) \ 724 . = ALIGN(align); \ 725 .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \ 726 VMLINUX_SYMBOL(__per_cpu_load) = .; \ 727 VMLINUX_SYMBOL(__per_cpu_start) = .; \ 728 *(.data..percpu..first) \ 729 . = ALIGN(PAGE_SIZE); \ 730 *(.data..percpu..page_aligned) \ 731 *(.data..percpu..readmostly) \ 732 *(.data..percpu) \ 733 *(.data..percpu..shared_aligned) \ 734 VMLINUX_SYMBOL(__per_cpu_end) = .; \ 735 } 736 737 738 /* 739 * Definition of the high level *_SECTION macros 740 * They will fit only a subset of the architectures 741 */ 742 743 744 /* 745 * Writeable data. 746 * All sections are combined in a single .data section. 747 * The sections following CONSTRUCTORS are arranged so their 748 * typical alignment matches. 749 * A cacheline is typical/always less than a PAGE_SIZE so 750 * the sections that has this restriction (or similar) 751 * is located before the ones requiring PAGE_SIZE alignment. 752 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which 753 * matches the requirment of PAGE_ALIGNED_DATA. 754 * 755 * use 0 as page_align if page_aligned data is not used */ 756 #define RW_DATA_SECTION(cacheline, pagealigned, inittask) \ 757 . = ALIGN(PAGE_SIZE); \ 758 .data : AT(ADDR(.data) - LOAD_OFFSET) { \ 759 INIT_TASK_DATA(inittask) \ 760 NOSAVE_DATA \ 761 PAGE_ALIGNED_DATA(pagealigned) \ 762 CACHELINE_ALIGNED_DATA(cacheline) \ 763 READ_MOSTLY_DATA(cacheline) \ 764 DATA_DATA \ 765 CONSTRUCTORS \ 766 } 767 768 #define INIT_TEXT_SECTION(inittext_align) \ 769 . = ALIGN(inittext_align); \ 770 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \ 771 VMLINUX_SYMBOL(_sinittext) = .; \ 772 INIT_TEXT \ 773 VMLINUX_SYMBOL(_einittext) = .; \ 774 } 775 776 #define INIT_DATA_SECTION(initsetup_align) \ 777 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \ 778 INIT_DATA \ 779 INIT_SETUP(initsetup_align) \ 780 INIT_CALLS \ 781 CON_INITCALL \ 782 SECURITY_INITCALL \ 783 INIT_RAM_FS \ 784 } 785 786 #define BSS_SECTION(sbss_align, bss_align, stop_align) \ 787 . = ALIGN(sbss_align); \ 788 VMLINUX_SYMBOL(__bss_start) = .; \ 789 SBSS(sbss_align) \ 790 BSS(bss_align) \ 791 . = ALIGN(stop_align); \ 792 VMLINUX_SYMBOL(__bss_stop) = .; 793