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 * /DISCARD/ : { 37 * EXIT_TEXT 38 * EXIT_DATA 39 * EXIT_CALL 40 * } 41 * STABS_DEBUG 42 * DWARF_DEBUG 43 * } 44 * 45 * [__init_begin, __init_end] is the init section that may be freed after init 46 * [_stext, _etext] is the text section 47 * [_sdata, _edata] is the data section 48 * 49 * Some of the included output section have their own set of constants. 50 * Examples are: [__initramfs_start, __initramfs_end] for initramfs and 51 * [__nosave_begin, __nosave_end] for the nosave data 52 */ 53 54 #ifndef LOAD_OFFSET 55 #define LOAD_OFFSET 0 56 #endif 57 58 #ifndef VMLINUX_SYMBOL 59 #define VMLINUX_SYMBOL(_sym_) _sym_ 60 #endif 61 62 /* Align . to a 8 byte boundary equals to maximum function alignment. */ 63 #define ALIGN_FUNCTION() . = ALIGN(8) 64 65 /* The actual configuration determine if the init/exit sections 66 * are handled as text/data or they can be discarded (which 67 * often happens at runtime) 68 */ 69 #ifdef CONFIG_HOTPLUG 70 #define DEV_KEEP(sec) *(.dev##sec) 71 #define DEV_DISCARD(sec) 72 #else 73 #define DEV_KEEP(sec) 74 #define DEV_DISCARD(sec) *(.dev##sec) 75 #endif 76 77 #ifdef CONFIG_HOTPLUG_CPU 78 #define CPU_KEEP(sec) *(.cpu##sec) 79 #define CPU_DISCARD(sec) 80 #else 81 #define CPU_KEEP(sec) 82 #define CPU_DISCARD(sec) *(.cpu##sec) 83 #endif 84 85 #if defined(CONFIG_MEMORY_HOTPLUG) 86 #define MEM_KEEP(sec) *(.mem##sec) 87 #define MEM_DISCARD(sec) 88 #else 89 #define MEM_KEEP(sec) 90 #define MEM_DISCARD(sec) *(.mem##sec) 91 #endif 92 93 #ifdef CONFIG_FTRACE_MCOUNT_RECORD 94 #define MCOUNT_REC() VMLINUX_SYMBOL(__start_mcount_loc) = .; \ 95 *(__mcount_loc) \ 96 VMLINUX_SYMBOL(__stop_mcount_loc) = .; 97 #else 98 #define MCOUNT_REC() 99 #endif 100 101 #ifdef CONFIG_TRACE_BRANCH_PROFILING 102 #define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \ 103 *(_ftrace_annotated_branch) \ 104 VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .; 105 #else 106 #define LIKELY_PROFILE() 107 #endif 108 109 #ifdef CONFIG_PROFILE_ALL_BRANCHES 110 #define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \ 111 *(_ftrace_branch) \ 112 VMLINUX_SYMBOL(__stop_branch_profile) = .; 113 #else 114 #define BRANCH_PROFILE() 115 #endif 116 117 #ifdef CONFIG_EVENT_TRACING 118 #define FTRACE_EVENTS() VMLINUX_SYMBOL(__start_ftrace_events) = .; \ 119 *(_ftrace_events) \ 120 VMLINUX_SYMBOL(__stop_ftrace_events) = .; 121 #else 122 #define FTRACE_EVENTS() 123 #endif 124 125 #ifdef CONFIG_TRACING 126 #define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \ 127 *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \ 128 VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .; 129 #else 130 #define TRACE_PRINTKS() 131 #endif 132 133 #ifdef CONFIG_FTRACE_SYSCALLS 134 #define TRACE_SYSCALLS() VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \ 135 *(__syscalls_metadata) \ 136 VMLINUX_SYMBOL(__stop_syscalls_metadata) = .; 137 #else 138 #define TRACE_SYSCALLS() 139 #endif 140 141 /* .data section */ 142 #define DATA_DATA \ 143 *(.data) \ 144 *(.ref.data) \ 145 DEV_KEEP(init.data) \ 146 DEV_KEEP(exit.data) \ 147 CPU_KEEP(init.data) \ 148 CPU_KEEP(exit.data) \ 149 MEM_KEEP(init.data) \ 150 MEM_KEEP(exit.data) \ 151 . = ALIGN(8); \ 152 VMLINUX_SYMBOL(__start___markers) = .; \ 153 *(__markers) \ 154 VMLINUX_SYMBOL(__stop___markers) = .; \ 155 . = ALIGN(32); \ 156 VMLINUX_SYMBOL(__start___tracepoints) = .; \ 157 *(__tracepoints) \ 158 VMLINUX_SYMBOL(__stop___tracepoints) = .; \ 159 /* implement dynamic printk debug */ \ 160 . = ALIGN(8); \ 161 VMLINUX_SYMBOL(__start___verbose) = .; \ 162 *(__verbose) \ 163 VMLINUX_SYMBOL(__stop___verbose) = .; \ 164 LIKELY_PROFILE() \ 165 BRANCH_PROFILE() \ 166 TRACE_PRINTKS() \ 167 FTRACE_EVENTS() \ 168 TRACE_SYSCALLS() 169 170 /* 171 * Data section helpers 172 */ 173 #define NOSAVE_DATA \ 174 . = ALIGN(PAGE_SIZE); \ 175 VMLINUX_SYMBOL(__nosave_begin) = .; \ 176 *(.data.nosave) \ 177 . = ALIGN(PAGE_SIZE); \ 178 VMLINUX_SYMBOL(__nosave_end) = .; 179 180 #define PAGE_ALIGNED_DATA(page_align) \ 181 . = ALIGN(page_align); \ 182 *(.data.page_aligned) 183 184 #define READ_MOSTLY_DATA(align) \ 185 . = ALIGN(align); \ 186 *(.data.read_mostly) 187 188 #define CACHELINE_ALIGNED_DATA(align) \ 189 . = ALIGN(align); \ 190 *(.data.cacheline_aligned) 191 192 #define INIT_TASK_DATA(align) \ 193 . = ALIGN(align); \ 194 *(.data.init_task) 195 196 /* 197 * Read only Data 198 */ 199 #define RO_DATA_SECTION(align) \ 200 . = ALIGN((align)); \ 201 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \ 202 VMLINUX_SYMBOL(__start_rodata) = .; \ 203 *(.rodata) *(.rodata.*) \ 204 *(__vermagic) /* Kernel version magic */ \ 205 *(__markers_strings) /* Markers: strings */ \ 206 *(__tracepoints_strings)/* Tracepoints: strings */ \ 207 } \ 208 \ 209 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \ 210 *(.rodata1) \ 211 } \ 212 \ 213 BUG_TABLE \ 214 \ 215 /* PCI quirks */ \ 216 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \ 217 VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \ 218 *(.pci_fixup_early) \ 219 VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \ 220 VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \ 221 *(.pci_fixup_header) \ 222 VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \ 223 VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \ 224 *(.pci_fixup_final) \ 225 VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \ 226 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \ 227 *(.pci_fixup_enable) \ 228 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \ 229 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \ 230 *(.pci_fixup_resume) \ 231 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \ 232 VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \ 233 *(.pci_fixup_resume_early) \ 234 VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \ 235 VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \ 236 *(.pci_fixup_suspend) \ 237 VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \ 238 } \ 239 \ 240 /* Built-in firmware blobs */ \ 241 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \ 242 VMLINUX_SYMBOL(__start_builtin_fw) = .; \ 243 *(.builtin_fw) \ 244 VMLINUX_SYMBOL(__end_builtin_fw) = .; \ 245 } \ 246 \ 247 /* RapidIO route ops */ \ 248 .rio_route : AT(ADDR(.rio_route) - LOAD_OFFSET) { \ 249 VMLINUX_SYMBOL(__start_rio_route_ops) = .; \ 250 *(.rio_route_ops) \ 251 VMLINUX_SYMBOL(__end_rio_route_ops) = .; \ 252 } \ 253 \ 254 TRACEDATA \ 255 \ 256 /* Kernel symbol table: Normal symbols */ \ 257 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \ 258 VMLINUX_SYMBOL(__start___ksymtab) = .; \ 259 *(__ksymtab) \ 260 VMLINUX_SYMBOL(__stop___ksymtab) = .; \ 261 } \ 262 \ 263 /* Kernel symbol table: GPL-only symbols */ \ 264 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \ 265 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \ 266 *(__ksymtab_gpl) \ 267 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \ 268 } \ 269 \ 270 /* Kernel symbol table: Normal unused symbols */ \ 271 __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \ 272 VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \ 273 *(__ksymtab_unused) \ 274 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \ 275 } \ 276 \ 277 /* Kernel symbol table: GPL-only unused symbols */ \ 278 __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \ 279 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \ 280 *(__ksymtab_unused_gpl) \ 281 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \ 282 } \ 283 \ 284 /* Kernel symbol table: GPL-future-only symbols */ \ 285 __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \ 286 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \ 287 *(__ksymtab_gpl_future) \ 288 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \ 289 } \ 290 \ 291 /* Kernel symbol table: Normal symbols */ \ 292 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \ 293 VMLINUX_SYMBOL(__start___kcrctab) = .; \ 294 *(__kcrctab) \ 295 VMLINUX_SYMBOL(__stop___kcrctab) = .; \ 296 } \ 297 \ 298 /* Kernel symbol table: GPL-only symbols */ \ 299 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \ 300 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \ 301 *(__kcrctab_gpl) \ 302 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \ 303 } \ 304 \ 305 /* Kernel symbol table: Normal unused symbols */ \ 306 __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \ 307 VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \ 308 *(__kcrctab_unused) \ 309 VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \ 310 } \ 311 \ 312 /* Kernel symbol table: GPL-only unused symbols */ \ 313 __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \ 314 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \ 315 *(__kcrctab_unused_gpl) \ 316 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \ 317 } \ 318 \ 319 /* Kernel symbol table: GPL-future-only symbols */ \ 320 __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \ 321 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \ 322 *(__kcrctab_gpl_future) \ 323 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \ 324 } \ 325 \ 326 /* Kernel symbol table: strings */ \ 327 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \ 328 *(__ksymtab_strings) \ 329 } \ 330 \ 331 /* __*init sections */ \ 332 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \ 333 *(.ref.rodata) \ 334 MCOUNT_REC() \ 335 DEV_KEEP(init.rodata) \ 336 DEV_KEEP(exit.rodata) \ 337 CPU_KEEP(init.rodata) \ 338 CPU_KEEP(exit.rodata) \ 339 MEM_KEEP(init.rodata) \ 340 MEM_KEEP(exit.rodata) \ 341 } \ 342 \ 343 /* Built-in module parameters. */ \ 344 __param : AT(ADDR(__param) - LOAD_OFFSET) { \ 345 VMLINUX_SYMBOL(__start___param) = .; \ 346 *(__param) \ 347 VMLINUX_SYMBOL(__stop___param) = .; \ 348 . = ALIGN((align)); \ 349 VMLINUX_SYMBOL(__end_rodata) = .; \ 350 } \ 351 . = ALIGN((align)); 352 353 /* RODATA & RO_DATA provided for backward compatibility. 354 * All archs are supposed to use RO_DATA() */ 355 #define RODATA RO_DATA_SECTION(4096) 356 #define RO_DATA(align) RO_DATA_SECTION(align) 357 358 #define SECURITY_INIT \ 359 .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \ 360 VMLINUX_SYMBOL(__security_initcall_start) = .; \ 361 *(.security_initcall.init) \ 362 VMLINUX_SYMBOL(__security_initcall_end) = .; \ 363 } 364 365 /* .text section. Map to function alignment to avoid address changes 366 * during second ld run in second ld pass when generating System.map */ 367 #define TEXT_TEXT \ 368 ALIGN_FUNCTION(); \ 369 *(.text.hot) \ 370 *(.text) \ 371 *(.ref.text) \ 372 DEV_KEEP(init.text) \ 373 DEV_KEEP(exit.text) \ 374 CPU_KEEP(init.text) \ 375 CPU_KEEP(exit.text) \ 376 MEM_KEEP(init.text) \ 377 MEM_KEEP(exit.text) \ 378 *(.text.unlikely) 379 380 381 /* sched.text is aling to function alignment to secure we have same 382 * address even at second ld pass when generating System.map */ 383 #define SCHED_TEXT \ 384 ALIGN_FUNCTION(); \ 385 VMLINUX_SYMBOL(__sched_text_start) = .; \ 386 *(.sched.text) \ 387 VMLINUX_SYMBOL(__sched_text_end) = .; 388 389 /* spinlock.text is aling to function alignment to secure we have same 390 * address even at second ld pass when generating System.map */ 391 #define LOCK_TEXT \ 392 ALIGN_FUNCTION(); \ 393 VMLINUX_SYMBOL(__lock_text_start) = .; \ 394 *(.spinlock.text) \ 395 VMLINUX_SYMBOL(__lock_text_end) = .; 396 397 #define KPROBES_TEXT \ 398 ALIGN_FUNCTION(); \ 399 VMLINUX_SYMBOL(__kprobes_text_start) = .; \ 400 *(.kprobes.text) \ 401 VMLINUX_SYMBOL(__kprobes_text_end) = .; 402 403 #ifdef CONFIG_FUNCTION_GRAPH_TRACER 404 #define IRQENTRY_TEXT \ 405 ALIGN_FUNCTION(); \ 406 VMLINUX_SYMBOL(__irqentry_text_start) = .; \ 407 *(.irqentry.text) \ 408 VMLINUX_SYMBOL(__irqentry_text_end) = .; 409 #else 410 #define IRQENTRY_TEXT 411 #endif 412 413 /* Section used for early init (in .S files) */ 414 #define HEAD_TEXT *(.head.text) 415 416 #define HEAD_TEXT_SECTION \ 417 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \ 418 HEAD_TEXT \ 419 } 420 421 /* 422 * Exception table 423 */ 424 #define EXCEPTION_TABLE(align) \ 425 . = ALIGN(align); \ 426 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \ 427 VMLINUX_SYMBOL(__start___ex_table) = .; \ 428 *(__ex_table) \ 429 VMLINUX_SYMBOL(__stop___ex_table) = .; \ 430 } 431 432 /* 433 * Init task 434 */ 435 #define INIT_TASK_DATA_SECTION(align) \ 436 . = ALIGN(align); \ 437 .data.init_task : { \ 438 INIT_TASK_DATA(align) \ 439 } 440 441 #ifdef CONFIG_CONSTRUCTORS 442 #define KERNEL_CTORS() . = ALIGN(8); \ 443 VMLINUX_SYMBOL(__ctors_start) = .; \ 444 *(.ctors) \ 445 VMLINUX_SYMBOL(__ctors_end) = .; 446 #else 447 #define KERNEL_CTORS() 448 #endif 449 450 /* init and exit section handling */ 451 #define INIT_DATA \ 452 *(.init.data) \ 453 DEV_DISCARD(init.data) \ 454 CPU_DISCARD(init.data) \ 455 MEM_DISCARD(init.data) \ 456 KERNEL_CTORS() \ 457 *(.init.rodata) \ 458 DEV_DISCARD(init.rodata) \ 459 CPU_DISCARD(init.rodata) \ 460 MEM_DISCARD(init.rodata) 461 462 #define INIT_TEXT \ 463 *(.init.text) \ 464 DEV_DISCARD(init.text) \ 465 CPU_DISCARD(init.text) \ 466 MEM_DISCARD(init.text) 467 468 #define EXIT_DATA \ 469 *(.exit.data) \ 470 DEV_DISCARD(exit.data) \ 471 DEV_DISCARD(exit.rodata) \ 472 CPU_DISCARD(exit.data) \ 473 CPU_DISCARD(exit.rodata) \ 474 MEM_DISCARD(exit.data) \ 475 MEM_DISCARD(exit.rodata) 476 477 #define EXIT_TEXT \ 478 *(.exit.text) \ 479 DEV_DISCARD(exit.text) \ 480 CPU_DISCARD(exit.text) \ 481 MEM_DISCARD(exit.text) 482 483 #define EXIT_CALL \ 484 *(.exitcall.exit) 485 486 /* 487 * bss (Block Started by Symbol) - uninitialized data 488 * zeroed during startup 489 */ 490 #define SBSS(sbss_align) \ 491 . = ALIGN(sbss_align); \ 492 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \ 493 *(.sbss) \ 494 *(.scommon) \ 495 } 496 497 #define BSS(bss_align) \ 498 . = ALIGN(bss_align); \ 499 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \ 500 *(.bss.page_aligned) \ 501 *(.dynbss) \ 502 *(.bss) \ 503 *(COMMON) \ 504 } 505 506 /* 507 * DWARF debug sections. 508 * Symbols in the DWARF debugging sections are relative to 509 * the beginning of the section so we begin them at 0. 510 */ 511 #define DWARF_DEBUG \ 512 /* DWARF 1 */ \ 513 .debug 0 : { *(.debug) } \ 514 .line 0 : { *(.line) } \ 515 /* GNU DWARF 1 extensions */ \ 516 .debug_srcinfo 0 : { *(.debug_srcinfo) } \ 517 .debug_sfnames 0 : { *(.debug_sfnames) } \ 518 /* DWARF 1.1 and DWARF 2 */ \ 519 .debug_aranges 0 : { *(.debug_aranges) } \ 520 .debug_pubnames 0 : { *(.debug_pubnames) } \ 521 /* DWARF 2 */ \ 522 .debug_info 0 : { *(.debug_info \ 523 .gnu.linkonce.wi.*) } \ 524 .debug_abbrev 0 : { *(.debug_abbrev) } \ 525 .debug_line 0 : { *(.debug_line) } \ 526 .debug_frame 0 : { *(.debug_frame) } \ 527 .debug_str 0 : { *(.debug_str) } \ 528 .debug_loc 0 : { *(.debug_loc) } \ 529 .debug_macinfo 0 : { *(.debug_macinfo) } \ 530 /* SGI/MIPS DWARF 2 extensions */ \ 531 .debug_weaknames 0 : { *(.debug_weaknames) } \ 532 .debug_funcnames 0 : { *(.debug_funcnames) } \ 533 .debug_typenames 0 : { *(.debug_typenames) } \ 534 .debug_varnames 0 : { *(.debug_varnames) } \ 535 536 /* Stabs debugging sections. */ 537 #define STABS_DEBUG \ 538 .stab 0 : { *(.stab) } \ 539 .stabstr 0 : { *(.stabstr) } \ 540 .stab.excl 0 : { *(.stab.excl) } \ 541 .stab.exclstr 0 : { *(.stab.exclstr) } \ 542 .stab.index 0 : { *(.stab.index) } \ 543 .stab.indexstr 0 : { *(.stab.indexstr) } \ 544 .comment 0 : { *(.comment) } 545 546 #ifdef CONFIG_GENERIC_BUG 547 #define BUG_TABLE \ 548 . = ALIGN(8); \ 549 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \ 550 VMLINUX_SYMBOL(__start___bug_table) = .; \ 551 *(__bug_table) \ 552 VMLINUX_SYMBOL(__stop___bug_table) = .; \ 553 } 554 #else 555 #define BUG_TABLE 556 #endif 557 558 #ifdef CONFIG_PM_TRACE 559 #define TRACEDATA \ 560 . = ALIGN(4); \ 561 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \ 562 VMLINUX_SYMBOL(__tracedata_start) = .; \ 563 *(.tracedata) \ 564 VMLINUX_SYMBOL(__tracedata_end) = .; \ 565 } 566 #else 567 #define TRACEDATA 568 #endif 569 570 #define NOTES \ 571 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \ 572 VMLINUX_SYMBOL(__start_notes) = .; \ 573 *(.note.*) \ 574 VMLINUX_SYMBOL(__stop_notes) = .; \ 575 } 576 577 #define INIT_SETUP(initsetup_align) \ 578 . = ALIGN(initsetup_align); \ 579 VMLINUX_SYMBOL(__setup_start) = .; \ 580 *(.init.setup) \ 581 VMLINUX_SYMBOL(__setup_end) = .; 582 583 #define INITCALLS \ 584 *(.initcallearly.init) \ 585 VMLINUX_SYMBOL(__early_initcall_end) = .; \ 586 *(.initcall0.init) \ 587 *(.initcall0s.init) \ 588 *(.initcall1.init) \ 589 *(.initcall1s.init) \ 590 *(.initcall2.init) \ 591 *(.initcall2s.init) \ 592 *(.initcall3.init) \ 593 *(.initcall3s.init) \ 594 *(.initcall4.init) \ 595 *(.initcall4s.init) \ 596 *(.initcall5.init) \ 597 *(.initcall5s.init) \ 598 *(.initcallrootfs.init) \ 599 *(.initcall6.init) \ 600 *(.initcall6s.init) \ 601 *(.initcall7.init) \ 602 *(.initcall7s.init) 603 604 #define INIT_CALLS \ 605 VMLINUX_SYMBOL(__initcall_start) = .; \ 606 INITCALLS \ 607 VMLINUX_SYMBOL(__initcall_end) = .; 608 609 #define CON_INITCALL \ 610 VMLINUX_SYMBOL(__con_initcall_start) = .; \ 611 *(.con_initcall.init) \ 612 VMLINUX_SYMBOL(__con_initcall_end) = .; 613 614 #define SECURITY_INITCALL \ 615 VMLINUX_SYMBOL(__security_initcall_start) = .; \ 616 *(.security_initcall.init) \ 617 VMLINUX_SYMBOL(__security_initcall_end) = .; 618 619 #ifdef CONFIG_BLK_DEV_INITRD 620 #define INIT_RAM_FS \ 621 . = ALIGN(PAGE_SIZE); \ 622 VMLINUX_SYMBOL(__initramfs_start) = .; \ 623 *(.init.ramfs) \ 624 VMLINUX_SYMBOL(__initramfs_end) = .; 625 #else 626 #define INIT_RAM_FS 627 #endif 628 629 /** 630 * PERCPU_VADDR - define output section for percpu area 631 * @vaddr: explicit base address (optional) 632 * @phdr: destination PHDR (optional) 633 * 634 * Macro which expands to output section for percpu area. If @vaddr 635 * is not blank, it specifies explicit base address and all percpu 636 * symbols will be offset from the given address. If blank, @vaddr 637 * always equals @laddr + LOAD_OFFSET. 638 * 639 * @phdr defines the output PHDR to use if not blank. Be warned that 640 * output PHDR is sticky. If @phdr is specified, the next output 641 * section in the linker script will go there too. @phdr should have 642 * a leading colon. 643 * 644 * Note that this macros defines __per_cpu_load as an absolute symbol. 645 * If there is no need to put the percpu section at a predetermined 646 * address, use PERCPU(). 647 */ 648 #define PERCPU_VADDR(vaddr, phdr) \ 649 VMLINUX_SYMBOL(__per_cpu_load) = .; \ 650 .data.percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \ 651 - LOAD_OFFSET) { \ 652 VMLINUX_SYMBOL(__per_cpu_start) = .; \ 653 *(.data.percpu.first) \ 654 *(.data.percpu.page_aligned) \ 655 *(.data.percpu) \ 656 *(.data.percpu.shared_aligned) \ 657 VMLINUX_SYMBOL(__per_cpu_end) = .; \ 658 } phdr \ 659 . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data.percpu); 660 661 /** 662 * PERCPU - define output section for percpu area, simple version 663 * @align: required alignment 664 * 665 * Align to @align and outputs output section for percpu area. This 666 * macro doesn't maniuplate @vaddr or @phdr and __per_cpu_load and 667 * __per_cpu_start will be identical. 668 * 669 * This macro is equivalent to ALIGN(align); PERCPU_VADDR( , ) except 670 * that __per_cpu_load is defined as a relative symbol against 671 * .data.percpu which is required for relocatable x86_32 672 * configuration. 673 */ 674 #define PERCPU(align) \ 675 . = ALIGN(align); \ 676 .data.percpu : AT(ADDR(.data.percpu) - LOAD_OFFSET) { \ 677 VMLINUX_SYMBOL(__per_cpu_load) = .; \ 678 VMLINUX_SYMBOL(__per_cpu_start) = .; \ 679 *(.data.percpu.first) \ 680 *(.data.percpu.page_aligned) \ 681 *(.data.percpu) \ 682 *(.data.percpu.shared_aligned) \ 683 VMLINUX_SYMBOL(__per_cpu_end) = .; \ 684 } 685 686 687 /* 688 * Definition of the high level *_SECTION macros 689 * They will fit only a subset of the architectures 690 */ 691 692 693 /* 694 * Writeable data. 695 * All sections are combined in a single .data section. 696 * The sections following CONSTRUCTORS are arranged so their 697 * typical alignment matches. 698 * A cacheline is typical/always less than a PAGE_SIZE so 699 * the sections that has this restriction (or similar) 700 * is located before the ones requiring PAGE_SIZE alignment. 701 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which 702 * matches the requirment of PAGE_ALIGNED_DATA. 703 * 704 * use 0 as page_align if page_aligned data is not used */ 705 #define RW_DATA_SECTION(cacheline, pagealigned, inittask) \ 706 . = ALIGN(PAGE_SIZE); \ 707 .data : AT(ADDR(.data) - LOAD_OFFSET) { \ 708 INIT_TASK_DATA(inittask) \ 709 CACHELINE_ALIGNED_DATA(cacheline) \ 710 READ_MOSTLY_DATA(cacheline) \ 711 DATA_DATA \ 712 CONSTRUCTORS \ 713 NOSAVE_DATA \ 714 PAGE_ALIGNED_DATA(pagealigned) \ 715 } 716 717 #define INIT_TEXT_SECTION(inittext_align) \ 718 . = ALIGN(inittext_align); \ 719 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \ 720 VMLINUX_SYMBOL(_sinittext) = .; \ 721 INIT_TEXT \ 722 VMLINUX_SYMBOL(_einittext) = .; \ 723 } 724 725 #define INIT_DATA_SECTION(initsetup_align) \ 726 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \ 727 INIT_DATA \ 728 INIT_SETUP(initsetup_align) \ 729 INIT_CALLS \ 730 CON_INITCALL \ 731 SECURITY_INITCALL \ 732 INIT_RAM_FS \ 733 } 734 735 #define BSS_SECTION(sbss_align, bss_align, stop_align) \ 736 . = ALIGN(sbss_align); \ 737 VMLINUX_SYMBOL(__bss_start) = .; \ 738 SBSS(sbss_align) \ 739 BSS(bss_align) \ 740 . = ALIGN(stop_align); \ 741 VMLINUX_SYMBOL(__bss_stop) = .; 742