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 * [_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() . = ALIGN(8); \ 128 VMLINUX_SYMBOL(__start_ftrace_events) = .; \ 129 *(_ftrace_events) \ 130 VMLINUX_SYMBOL(__stop_ftrace_events) = .; 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 #else 140 #define TRACE_PRINTKS() 141 #endif 142 143 #ifdef CONFIG_FTRACE_SYSCALLS 144 #define TRACE_SYSCALLS() . = ALIGN(8); \ 145 VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \ 146 *(__syscalls_metadata) \ 147 VMLINUX_SYMBOL(__stop_syscalls_metadata) = .; 148 #else 149 #define TRACE_SYSCALLS() 150 #endif 151 152 153 #define KERNEL_DTB() \ 154 STRUCT_ALIGN(); \ 155 VMLINUX_SYMBOL(__dtb_start) = .; \ 156 *(.dtb.init.rodata) \ 157 VMLINUX_SYMBOL(__dtb_end) = .; 158 159 /* .data section */ 160 #define DATA_DATA \ 161 *(.data) \ 162 *(.ref.data) \ 163 *(.data..shared_aligned) /* percpu related */ \ 164 DEV_KEEP(init.data) \ 165 DEV_KEEP(exit.data) \ 166 CPU_KEEP(init.data) \ 167 CPU_KEEP(exit.data) \ 168 MEM_KEEP(init.data) \ 169 MEM_KEEP(exit.data) \ 170 STRUCT_ALIGN(); \ 171 *(__tracepoints) \ 172 /* implement dynamic printk debug */ \ 173 . = ALIGN(8); \ 174 VMLINUX_SYMBOL(__start___jump_table) = .; \ 175 *(__jump_table) \ 176 VMLINUX_SYMBOL(__stop___jump_table) = .; \ 177 . = ALIGN(8); \ 178 VMLINUX_SYMBOL(__start___verbose) = .; \ 179 *(__verbose) \ 180 VMLINUX_SYMBOL(__stop___verbose) = .; \ 181 LIKELY_PROFILE() \ 182 BRANCH_PROFILE() \ 183 TRACE_PRINTKS() 184 185 /* 186 * Data section helpers 187 */ 188 #define NOSAVE_DATA \ 189 . = ALIGN(PAGE_SIZE); \ 190 VMLINUX_SYMBOL(__nosave_begin) = .; \ 191 *(.data..nosave) \ 192 . = ALIGN(PAGE_SIZE); \ 193 VMLINUX_SYMBOL(__nosave_end) = .; 194 195 #define PAGE_ALIGNED_DATA(page_align) \ 196 . = ALIGN(page_align); \ 197 *(.data..page_aligned) 198 199 #define READ_MOSTLY_DATA(align) \ 200 . = ALIGN(align); \ 201 *(.data..read_mostly) \ 202 . = ALIGN(align); 203 204 #define CACHELINE_ALIGNED_DATA(align) \ 205 . = ALIGN(align); \ 206 *(.data..cacheline_aligned) 207 208 #define INIT_TASK_DATA(align) \ 209 . = ALIGN(align); \ 210 *(.data..init_task) 211 212 /* 213 * Read only Data 214 */ 215 #define RO_DATA_SECTION(align) \ 216 . = ALIGN((align)); \ 217 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \ 218 VMLINUX_SYMBOL(__start_rodata) = .; \ 219 *(.rodata) *(.rodata.*) \ 220 *(__vermagic) /* Kernel version magic */ \ 221 . = ALIGN(8); \ 222 VMLINUX_SYMBOL(__start___tracepoints_ptrs) = .; \ 223 *(__tracepoints_ptrs) /* Tracepoints: pointer array */\ 224 VMLINUX_SYMBOL(__stop___tracepoints_ptrs) = .; \ 225 *(__tracepoints_strings)/* Tracepoints: strings */ \ 226 } \ 227 \ 228 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \ 229 *(.rodata1) \ 230 } \ 231 \ 232 BUG_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 *(SORT(___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 *(SORT(___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 *(SORT(___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 *(SORT(___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 *(SORT(___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 *(SORT(___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 *(SORT(___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 *(SORT(___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 *(SORT(___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 *(SORT(___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 } \ 367 \ 368 /* Built-in module versions. */ \ 369 __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \ 370 VMLINUX_SYMBOL(__start___modver) = .; \ 371 *(__modver) \ 372 VMLINUX_SYMBOL(__stop___modver) = .; \ 373 . = ALIGN((align)); \ 374 VMLINUX_SYMBOL(__end_rodata) = .; \ 375 } \ 376 . = ALIGN((align)); 377 378 /* RODATA & RO_DATA provided for backward compatibility. 379 * All archs are supposed to use RO_DATA() */ 380 #define RODATA RO_DATA_SECTION(4096) 381 #define RO_DATA(align) RO_DATA_SECTION(align) 382 383 #define SECURITY_INIT \ 384 .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \ 385 VMLINUX_SYMBOL(__security_initcall_start) = .; \ 386 *(.security_initcall.init) \ 387 VMLINUX_SYMBOL(__security_initcall_end) = .; \ 388 } 389 390 /* .text section. Map to function alignment to avoid address changes 391 * during second ld run in second ld pass when generating System.map */ 392 #define TEXT_TEXT \ 393 ALIGN_FUNCTION(); \ 394 *(.text.hot) \ 395 *(.text) \ 396 *(.ref.text) \ 397 DEV_KEEP(init.text) \ 398 DEV_KEEP(exit.text) \ 399 CPU_KEEP(init.text) \ 400 CPU_KEEP(exit.text) \ 401 MEM_KEEP(init.text) \ 402 MEM_KEEP(exit.text) \ 403 *(.text.unlikely) 404 405 406 /* sched.text is aling to function alignment to secure we have same 407 * address even at second ld pass when generating System.map */ 408 #define SCHED_TEXT \ 409 ALIGN_FUNCTION(); \ 410 VMLINUX_SYMBOL(__sched_text_start) = .; \ 411 *(.sched.text) \ 412 VMLINUX_SYMBOL(__sched_text_end) = .; 413 414 /* spinlock.text is aling to function alignment to secure we have same 415 * address even at second ld pass when generating System.map */ 416 #define LOCK_TEXT \ 417 ALIGN_FUNCTION(); \ 418 VMLINUX_SYMBOL(__lock_text_start) = .; \ 419 *(.spinlock.text) \ 420 VMLINUX_SYMBOL(__lock_text_end) = .; 421 422 #define KPROBES_TEXT \ 423 ALIGN_FUNCTION(); \ 424 VMLINUX_SYMBOL(__kprobes_text_start) = .; \ 425 *(.kprobes.text) \ 426 VMLINUX_SYMBOL(__kprobes_text_end) = .; 427 428 #define ENTRY_TEXT \ 429 ALIGN_FUNCTION(); \ 430 VMLINUX_SYMBOL(__entry_text_start) = .; \ 431 *(.entry.text) \ 432 VMLINUX_SYMBOL(__entry_text_end) = .; 433 434 #ifdef CONFIG_FUNCTION_GRAPH_TRACER 435 #define IRQENTRY_TEXT \ 436 ALIGN_FUNCTION(); \ 437 VMLINUX_SYMBOL(__irqentry_text_start) = .; \ 438 *(.irqentry.text) \ 439 VMLINUX_SYMBOL(__irqentry_text_end) = .; 440 #else 441 #define IRQENTRY_TEXT 442 #endif 443 444 /* Section used for early init (in .S files) */ 445 #define HEAD_TEXT *(.head.text) 446 447 #define HEAD_TEXT_SECTION \ 448 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \ 449 HEAD_TEXT \ 450 } 451 452 /* 453 * Exception table 454 */ 455 #define EXCEPTION_TABLE(align) \ 456 . = ALIGN(align); \ 457 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \ 458 VMLINUX_SYMBOL(__start___ex_table) = .; \ 459 *(__ex_table) \ 460 VMLINUX_SYMBOL(__stop___ex_table) = .; \ 461 } 462 463 /* 464 * Init task 465 */ 466 #define INIT_TASK_DATA_SECTION(align) \ 467 . = ALIGN(align); \ 468 .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \ 469 INIT_TASK_DATA(align) \ 470 } 471 472 #ifdef CONFIG_CONSTRUCTORS 473 #define KERNEL_CTORS() . = ALIGN(8); \ 474 VMLINUX_SYMBOL(__ctors_start) = .; \ 475 *(.ctors) \ 476 VMLINUX_SYMBOL(__ctors_end) = .; 477 #else 478 #define KERNEL_CTORS() 479 #endif 480 481 /* init and exit section handling */ 482 #define INIT_DATA \ 483 *(.init.data) \ 484 DEV_DISCARD(init.data) \ 485 CPU_DISCARD(init.data) \ 486 MEM_DISCARD(init.data) \ 487 KERNEL_CTORS() \ 488 *(.init.rodata) \ 489 MCOUNT_REC() \ 490 FTRACE_EVENTS() \ 491 TRACE_SYSCALLS() \ 492 DEV_DISCARD(init.rodata) \ 493 CPU_DISCARD(init.rodata) \ 494 MEM_DISCARD(init.rodata) \ 495 KERNEL_DTB() 496 497 #define INIT_TEXT \ 498 *(.init.text) \ 499 DEV_DISCARD(init.text) \ 500 CPU_DISCARD(init.text) \ 501 MEM_DISCARD(init.text) 502 503 #define EXIT_DATA \ 504 *(.exit.data) \ 505 DEV_DISCARD(exit.data) \ 506 DEV_DISCARD(exit.rodata) \ 507 CPU_DISCARD(exit.data) \ 508 CPU_DISCARD(exit.rodata) \ 509 MEM_DISCARD(exit.data) \ 510 MEM_DISCARD(exit.rodata) 511 512 #define EXIT_TEXT \ 513 *(.exit.text) \ 514 DEV_DISCARD(exit.text) \ 515 CPU_DISCARD(exit.text) \ 516 MEM_DISCARD(exit.text) 517 518 #define EXIT_CALL \ 519 *(.exitcall.exit) 520 521 /* 522 * bss (Block Started by Symbol) - uninitialized data 523 * zeroed during startup 524 */ 525 #define SBSS(sbss_align) \ 526 . = ALIGN(sbss_align); \ 527 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \ 528 *(.sbss) \ 529 *(.scommon) \ 530 } 531 532 #define BSS(bss_align) \ 533 . = ALIGN(bss_align); \ 534 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \ 535 *(.bss..page_aligned) \ 536 *(.dynbss) \ 537 *(.bss) \ 538 *(COMMON) \ 539 } 540 541 /* 542 * DWARF debug sections. 543 * Symbols in the DWARF debugging sections are relative to 544 * the beginning of the section so we begin them at 0. 545 */ 546 #define DWARF_DEBUG \ 547 /* DWARF 1 */ \ 548 .debug 0 : { *(.debug) } \ 549 .line 0 : { *(.line) } \ 550 /* GNU DWARF 1 extensions */ \ 551 .debug_srcinfo 0 : { *(.debug_srcinfo) } \ 552 .debug_sfnames 0 : { *(.debug_sfnames) } \ 553 /* DWARF 1.1 and DWARF 2 */ \ 554 .debug_aranges 0 : { *(.debug_aranges) } \ 555 .debug_pubnames 0 : { *(.debug_pubnames) } \ 556 /* DWARF 2 */ \ 557 .debug_info 0 : { *(.debug_info \ 558 .gnu.linkonce.wi.*) } \ 559 .debug_abbrev 0 : { *(.debug_abbrev) } \ 560 .debug_line 0 : { *(.debug_line) } \ 561 .debug_frame 0 : { *(.debug_frame) } \ 562 .debug_str 0 : { *(.debug_str) } \ 563 .debug_loc 0 : { *(.debug_loc) } \ 564 .debug_macinfo 0 : { *(.debug_macinfo) } \ 565 /* SGI/MIPS DWARF 2 extensions */ \ 566 .debug_weaknames 0 : { *(.debug_weaknames) } \ 567 .debug_funcnames 0 : { *(.debug_funcnames) } \ 568 .debug_typenames 0 : { *(.debug_typenames) } \ 569 .debug_varnames 0 : { *(.debug_varnames) } \ 570 571 /* Stabs debugging sections. */ 572 #define STABS_DEBUG \ 573 .stab 0 : { *(.stab) } \ 574 .stabstr 0 : { *(.stabstr) } \ 575 .stab.excl 0 : { *(.stab.excl) } \ 576 .stab.exclstr 0 : { *(.stab.exclstr) } \ 577 .stab.index 0 : { *(.stab.index) } \ 578 .stab.indexstr 0 : { *(.stab.indexstr) } \ 579 .comment 0 : { *(.comment) } 580 581 #ifdef CONFIG_GENERIC_BUG 582 #define BUG_TABLE \ 583 . = ALIGN(8); \ 584 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \ 585 VMLINUX_SYMBOL(__start___bug_table) = .; \ 586 *(__bug_table) \ 587 VMLINUX_SYMBOL(__stop___bug_table) = .; \ 588 } 589 #else 590 #define BUG_TABLE 591 #endif 592 593 #ifdef CONFIG_PM_TRACE 594 #define TRACEDATA \ 595 . = ALIGN(4); \ 596 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \ 597 VMLINUX_SYMBOL(__tracedata_start) = .; \ 598 *(.tracedata) \ 599 VMLINUX_SYMBOL(__tracedata_end) = .; \ 600 } 601 #else 602 #define TRACEDATA 603 #endif 604 605 #define NOTES \ 606 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \ 607 VMLINUX_SYMBOL(__start_notes) = .; \ 608 *(.note.*) \ 609 VMLINUX_SYMBOL(__stop_notes) = .; \ 610 } 611 612 #define INIT_SETUP(initsetup_align) \ 613 . = ALIGN(initsetup_align); \ 614 VMLINUX_SYMBOL(__setup_start) = .; \ 615 *(.init.setup) \ 616 VMLINUX_SYMBOL(__setup_end) = .; 617 618 #define INITCALLS \ 619 *(.initcallearly.init) \ 620 VMLINUX_SYMBOL(__early_initcall_end) = .; \ 621 *(.initcall0.init) \ 622 *(.initcall0s.init) \ 623 *(.initcall1.init) \ 624 *(.initcall1s.init) \ 625 *(.initcall2.init) \ 626 *(.initcall2s.init) \ 627 *(.initcall3.init) \ 628 *(.initcall3s.init) \ 629 *(.initcall4.init) \ 630 *(.initcall4s.init) \ 631 *(.initcall5.init) \ 632 *(.initcall5s.init) \ 633 *(.initcallrootfs.init) \ 634 *(.initcall6.init) \ 635 *(.initcall6s.init) \ 636 *(.initcall7.init) \ 637 *(.initcall7s.init) 638 639 #define INIT_CALLS \ 640 VMLINUX_SYMBOL(__initcall_start) = .; \ 641 INITCALLS \ 642 VMLINUX_SYMBOL(__initcall_end) = .; 643 644 #define CON_INITCALL \ 645 VMLINUX_SYMBOL(__con_initcall_start) = .; \ 646 *(.con_initcall.init) \ 647 VMLINUX_SYMBOL(__con_initcall_end) = .; 648 649 #define SECURITY_INITCALL \ 650 VMLINUX_SYMBOL(__security_initcall_start) = .; \ 651 *(.security_initcall.init) \ 652 VMLINUX_SYMBOL(__security_initcall_end) = .; 653 654 #ifdef CONFIG_BLK_DEV_INITRD 655 #define INIT_RAM_FS \ 656 . = ALIGN(4); \ 657 VMLINUX_SYMBOL(__initramfs_start) = .; \ 658 *(.init.ramfs) \ 659 . = ALIGN(8); \ 660 *(.init.ramfs.info) 661 #else 662 #define INIT_RAM_FS 663 #endif 664 665 /* 666 * Default discarded sections. 667 * 668 * Some archs want to discard exit text/data at runtime rather than 669 * link time due to cross-section references such as alt instructions, 670 * bug table, eh_frame, etc. DISCARDS must be the last of output 671 * section definitions so that such archs put those in earlier section 672 * definitions. 673 */ 674 #define DISCARDS \ 675 /DISCARD/ : { \ 676 EXIT_TEXT \ 677 EXIT_DATA \ 678 EXIT_CALL \ 679 *(.discard) \ 680 *(.discard.*) \ 681 } 682 683 /** 684 * PERCPU_INPUT - the percpu input sections 685 * @cacheline: cacheline size 686 * 687 * The core percpu section names and core symbols which do not rely 688 * directly upon load addresses. 689 * 690 * @cacheline is used to align subsections to avoid false cacheline 691 * sharing between subsections for different purposes. 692 */ 693 #define PERCPU_INPUT(cacheline) \ 694 VMLINUX_SYMBOL(__per_cpu_start) = .; \ 695 *(.data..percpu..first) \ 696 . = ALIGN(PAGE_SIZE); \ 697 *(.data..percpu..page_aligned) \ 698 . = ALIGN(cacheline); \ 699 *(.data..percpu..readmostly) \ 700 . = ALIGN(cacheline); \ 701 *(.data..percpu) \ 702 *(.data..percpu..shared_aligned) \ 703 VMLINUX_SYMBOL(__per_cpu_end) = .; 704 705 /** 706 * PERCPU_VADDR - define output section for percpu area 707 * @cacheline: cacheline size 708 * @vaddr: explicit base address (optional) 709 * @phdr: destination PHDR (optional) 710 * 711 * Macro which expands to output section for percpu area. 712 * 713 * @cacheline is used to align subsections to avoid false cacheline 714 * sharing between subsections for different purposes. 715 * 716 * If @vaddr is not blank, it specifies explicit base address and all 717 * percpu symbols will be offset from the given address. If blank, 718 * @vaddr always equals @laddr + LOAD_OFFSET. 719 * 720 * @phdr defines the output PHDR to use if not blank. Be warned that 721 * output PHDR is sticky. If @phdr is specified, the next output 722 * section in the linker script will go there too. @phdr should have 723 * a leading colon. 724 * 725 * Note that this macros defines __per_cpu_load as an absolute symbol. 726 * If there is no need to put the percpu section at a predetermined 727 * address, use PERCPU_SECTION. 728 */ 729 #define PERCPU_VADDR(cacheline, vaddr, phdr) \ 730 VMLINUX_SYMBOL(__per_cpu_load) = .; \ 731 .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \ 732 - LOAD_OFFSET) { \ 733 PERCPU_INPUT(cacheline) \ 734 } phdr \ 735 . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu); 736 737 /** 738 * PERCPU_SECTION - define output section for percpu area, simple version 739 * @cacheline: cacheline size 740 * 741 * Align to PAGE_SIZE and outputs output section for percpu area. This 742 * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and 743 * __per_cpu_start will be identical. 744 * 745 * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,) 746 * except that __per_cpu_load is defined as a relative symbol against 747 * .data..percpu which is required for relocatable x86_32 configuration. 748 */ 749 #define PERCPU_SECTION(cacheline) \ 750 . = ALIGN(PAGE_SIZE); \ 751 .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \ 752 VMLINUX_SYMBOL(__per_cpu_load) = .; \ 753 PERCPU_INPUT(cacheline) \ 754 } 755 756 757 /* 758 * Definition of the high level *_SECTION macros 759 * They will fit only a subset of the architectures 760 */ 761 762 763 /* 764 * Writeable data. 765 * All sections are combined in a single .data section. 766 * The sections following CONSTRUCTORS are arranged so their 767 * typical alignment matches. 768 * A cacheline is typical/always less than a PAGE_SIZE so 769 * the sections that has this restriction (or similar) 770 * is located before the ones requiring PAGE_SIZE alignment. 771 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which 772 * matches the requirement of PAGE_ALIGNED_DATA. 773 * 774 * use 0 as page_align if page_aligned data is not used */ 775 #define RW_DATA_SECTION(cacheline, pagealigned, inittask) \ 776 . = ALIGN(PAGE_SIZE); \ 777 .data : AT(ADDR(.data) - LOAD_OFFSET) { \ 778 INIT_TASK_DATA(inittask) \ 779 NOSAVE_DATA \ 780 PAGE_ALIGNED_DATA(pagealigned) \ 781 CACHELINE_ALIGNED_DATA(cacheline) \ 782 READ_MOSTLY_DATA(cacheline) \ 783 DATA_DATA \ 784 CONSTRUCTORS \ 785 } 786 787 #define INIT_TEXT_SECTION(inittext_align) \ 788 . = ALIGN(inittext_align); \ 789 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \ 790 VMLINUX_SYMBOL(_sinittext) = .; \ 791 INIT_TEXT \ 792 VMLINUX_SYMBOL(_einittext) = .; \ 793 } 794 795 #define INIT_DATA_SECTION(initsetup_align) \ 796 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \ 797 INIT_DATA \ 798 INIT_SETUP(initsetup_align) \ 799 INIT_CALLS \ 800 CON_INITCALL \ 801 SECURITY_INITCALL \ 802 INIT_RAM_FS \ 803 } 804 805 #define BSS_SECTION(sbss_align, bss_align, stop_align) \ 806 . = ALIGN(sbss_align); \ 807 VMLINUX_SYMBOL(__bss_start) = .; \ 808 SBSS(sbss_align) \ 809 BSS(bss_align) \ 810 . = ALIGN(stop_align); \ 811 VMLINUX_SYMBOL(__bss_stop) = .; 812