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