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_start = .; 34 * BSS_SECTION(0, 0) 35 * __bss_stop = .; 36 * _end = .; 37 * 38 * /DISCARD/ : { 39 * EXIT_TEXT 40 * EXIT_DATA 41 * EXIT_CALL 42 * } 43 * STABS_DEBUG 44 * DWARF_DEBUG 45 * } 46 * 47 * [__init_begin, __init_end] is the init section that may be freed after init 48 * [_stext, _etext] is the text section 49 * [_sdata, _edata] is the data section 50 * 51 * Some of the included output section have their own set of constants. 52 * Examples are: [__initramfs_start, __initramfs_end] for initramfs and 53 * [__nosave_begin, __nosave_end] for the nosave data 54 */ 55 56 #ifndef LOAD_OFFSET 57 #define LOAD_OFFSET 0 58 #endif 59 60 #ifndef VMLINUX_SYMBOL 61 #define VMLINUX_SYMBOL(_sym_) _sym_ 62 #endif 63 64 /* Align . to a 8 byte boundary equals to maximum function alignment. */ 65 #define ALIGN_FUNCTION() . = ALIGN(8) 66 67 /* The actual configuration determine if the init/exit sections 68 * are handled as text/data or they can be discarded (which 69 * often happens at runtime) 70 */ 71 #ifdef CONFIG_HOTPLUG 72 #define DEV_KEEP(sec) *(.dev##sec) 73 #define DEV_DISCARD(sec) 74 #else 75 #define DEV_KEEP(sec) 76 #define DEV_DISCARD(sec) *(.dev##sec) 77 #endif 78 79 #ifdef CONFIG_HOTPLUG_CPU 80 #define CPU_KEEP(sec) *(.cpu##sec) 81 #define CPU_DISCARD(sec) 82 #else 83 #define CPU_KEEP(sec) 84 #define CPU_DISCARD(sec) *(.cpu##sec) 85 #endif 86 87 #if defined(CONFIG_MEMORY_HOTPLUG) 88 #define MEM_KEEP(sec) *(.mem##sec) 89 #define MEM_DISCARD(sec) 90 #else 91 #define MEM_KEEP(sec) 92 #define MEM_DISCARD(sec) *(.mem##sec) 93 #endif 94 95 #ifdef CONFIG_FTRACE_MCOUNT_RECORD 96 #define MCOUNT_REC() VMLINUX_SYMBOL(__start_mcount_loc) = .; \ 97 *(__mcount_loc) \ 98 VMLINUX_SYMBOL(__stop_mcount_loc) = .; 99 #else 100 #define MCOUNT_REC() 101 #endif 102 103 #ifdef CONFIG_TRACE_BRANCH_PROFILING 104 #define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \ 105 *(_ftrace_annotated_branch) \ 106 VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .; 107 #else 108 #define LIKELY_PROFILE() 109 #endif 110 111 #ifdef CONFIG_PROFILE_ALL_BRANCHES 112 #define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \ 113 *(_ftrace_branch) \ 114 VMLINUX_SYMBOL(__stop_branch_profile) = .; 115 #else 116 #define BRANCH_PROFILE() 117 #endif 118 119 #ifdef CONFIG_EVENT_TRACING 120 #define FTRACE_EVENTS() VMLINUX_SYMBOL(__start_ftrace_events) = .; \ 121 *(_ftrace_events) \ 122 VMLINUX_SYMBOL(__stop_ftrace_events) = .; 123 #else 124 #define FTRACE_EVENTS() 125 #endif 126 127 #ifdef CONFIG_TRACING 128 #define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \ 129 *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \ 130 VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .; 131 #else 132 #define TRACE_PRINTKS() 133 #endif 134 135 #ifdef CONFIG_FTRACE_SYSCALLS 136 #define TRACE_SYSCALLS() VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \ 137 *(__syscalls_metadata) \ 138 VMLINUX_SYMBOL(__stop_syscalls_metadata) = .; 139 #else 140 #define TRACE_SYSCALLS() 141 #endif 142 143 /* .data section */ 144 #define DATA_DATA \ 145 *(.data) \ 146 *(.ref.data) \ 147 DEV_KEEP(init.data) \ 148 DEV_KEEP(exit.data) \ 149 CPU_KEEP(init.data) \ 150 CPU_KEEP(exit.data) \ 151 MEM_KEEP(init.data) \ 152 MEM_KEEP(exit.data) \ 153 . = ALIGN(8); \ 154 VMLINUX_SYMBOL(__start___markers) = .; \ 155 *(__markers) \ 156 VMLINUX_SYMBOL(__stop___markers) = .; \ 157 . = ALIGN(32); \ 158 VMLINUX_SYMBOL(__start___tracepoints) = .; \ 159 *(__tracepoints) \ 160 VMLINUX_SYMBOL(__stop___tracepoints) = .; \ 161 /* implement dynamic printk debug */ \ 162 . = ALIGN(8); \ 163 VMLINUX_SYMBOL(__start___verbose) = .; \ 164 *(__verbose) \ 165 VMLINUX_SYMBOL(__stop___verbose) = .; \ 166 LIKELY_PROFILE() \ 167 BRANCH_PROFILE() \ 168 TRACE_PRINTKS() \ 169 FTRACE_EVENTS() \ 170 TRACE_SYSCALLS() 171 172 /* 173 * Data section helpers 174 */ 175 #define NOSAVE_DATA \ 176 . = ALIGN(PAGE_SIZE); \ 177 VMLINUX_SYMBOL(__nosave_begin) = .; \ 178 *(.data.nosave) \ 179 . = ALIGN(PAGE_SIZE); \ 180 VMLINUX_SYMBOL(__nosave_end) = .; 181 182 #define PAGE_ALIGNED_DATA(page_align) \ 183 . = ALIGN(page_align); \ 184 *(.data.page_aligned) 185 186 #define READ_MOSTLY_DATA(align) \ 187 . = ALIGN(align); \ 188 *(.data.read_mostly) 189 190 #define CACHELINE_ALIGNED_DATA(align) \ 191 . = ALIGN(align); \ 192 *(.data.cacheline_aligned) 193 194 #define INIT_TASK(align) \ 195 . = ALIGN(align); \ 196 *(.data.init_task) 197 198 /* 199 * Read only Data 200 */ 201 #define RO_DATA_SECTION(align) \ 202 . = ALIGN((align)); \ 203 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \ 204 VMLINUX_SYMBOL(__start_rodata) = .; \ 205 *(.rodata) *(.rodata.*) \ 206 *(__vermagic) /* Kernel version magic */ \ 207 *(__markers_strings) /* Markers: strings */ \ 208 *(__tracepoints_strings)/* Tracepoints: strings */ \ 209 } \ 210 \ 211 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \ 212 *(.rodata1) \ 213 } \ 214 \ 215 BUG_TABLE \ 216 \ 217 /* PCI quirks */ \ 218 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \ 219 VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \ 220 *(.pci_fixup_early) \ 221 VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \ 222 VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \ 223 *(.pci_fixup_header) \ 224 VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \ 225 VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \ 226 *(.pci_fixup_final) \ 227 VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \ 228 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \ 229 *(.pci_fixup_enable) \ 230 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \ 231 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \ 232 *(.pci_fixup_resume) \ 233 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \ 234 VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \ 235 *(.pci_fixup_resume_early) \ 236 VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \ 237 VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \ 238 *(.pci_fixup_suspend) \ 239 VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \ 240 } \ 241 \ 242 /* Built-in firmware blobs */ \ 243 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \ 244 VMLINUX_SYMBOL(__start_builtin_fw) = .; \ 245 *(.builtin_fw) \ 246 VMLINUX_SYMBOL(__end_builtin_fw) = .; \ 247 } \ 248 \ 249 /* RapidIO route ops */ \ 250 .rio_route : AT(ADDR(.rio_route) - LOAD_OFFSET) { \ 251 VMLINUX_SYMBOL(__start_rio_route_ops) = .; \ 252 *(.rio_route_ops) \ 253 VMLINUX_SYMBOL(__end_rio_route_ops) = .; \ 254 } \ 255 \ 256 TRACEDATA \ 257 \ 258 /* Kernel symbol table: Normal symbols */ \ 259 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \ 260 VMLINUX_SYMBOL(__start___ksymtab) = .; \ 261 *(__ksymtab) \ 262 VMLINUX_SYMBOL(__stop___ksymtab) = .; \ 263 } \ 264 \ 265 /* Kernel symbol table: GPL-only symbols */ \ 266 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \ 267 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \ 268 *(__ksymtab_gpl) \ 269 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \ 270 } \ 271 \ 272 /* Kernel symbol table: Normal unused symbols */ \ 273 __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \ 274 VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \ 275 *(__ksymtab_unused) \ 276 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \ 277 } \ 278 \ 279 /* Kernel symbol table: GPL-only unused symbols */ \ 280 __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \ 281 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \ 282 *(__ksymtab_unused_gpl) \ 283 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \ 284 } \ 285 \ 286 /* Kernel symbol table: GPL-future-only symbols */ \ 287 __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \ 288 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \ 289 *(__ksymtab_gpl_future) \ 290 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \ 291 } \ 292 \ 293 /* Kernel symbol table: Normal symbols */ \ 294 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \ 295 VMLINUX_SYMBOL(__start___kcrctab) = .; \ 296 *(__kcrctab) \ 297 VMLINUX_SYMBOL(__stop___kcrctab) = .; \ 298 } \ 299 \ 300 /* Kernel symbol table: GPL-only symbols */ \ 301 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \ 302 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \ 303 *(__kcrctab_gpl) \ 304 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \ 305 } \ 306 \ 307 /* Kernel symbol table: Normal unused symbols */ \ 308 __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \ 309 VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \ 310 *(__kcrctab_unused) \ 311 VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \ 312 } \ 313 \ 314 /* Kernel symbol table: GPL-only unused symbols */ \ 315 __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \ 316 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \ 317 *(__kcrctab_unused_gpl) \ 318 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \ 319 } \ 320 \ 321 /* Kernel symbol table: GPL-future-only symbols */ \ 322 __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \ 323 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \ 324 *(__kcrctab_gpl_future) \ 325 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \ 326 } \ 327 \ 328 /* Kernel symbol table: strings */ \ 329 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \ 330 *(__ksymtab_strings) \ 331 } \ 332 \ 333 /* __*init sections */ \ 334 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \ 335 *(.ref.rodata) \ 336 MCOUNT_REC() \ 337 DEV_KEEP(init.rodata) \ 338 DEV_KEEP(exit.rodata) \ 339 CPU_KEEP(init.rodata) \ 340 CPU_KEEP(exit.rodata) \ 341 MEM_KEEP(init.rodata) \ 342 MEM_KEEP(exit.rodata) \ 343 } \ 344 \ 345 /* Built-in module parameters. */ \ 346 __param : AT(ADDR(__param) - LOAD_OFFSET) { \ 347 VMLINUX_SYMBOL(__start___param) = .; \ 348 *(__param) \ 349 VMLINUX_SYMBOL(__stop___param) = .; \ 350 . = ALIGN((align)); \ 351 VMLINUX_SYMBOL(__end_rodata) = .; \ 352 } \ 353 . = ALIGN((align)); 354 355 /* RODATA & RO_DATA provided for backward compatibility. 356 * All archs are supposed to use RO_DATA() */ 357 #define RODATA RO_DATA_SECTION(4096) 358 #define RO_DATA(align) RO_DATA_SECTION(align) 359 360 #define SECURITY_INIT \ 361 .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \ 362 VMLINUX_SYMBOL(__security_initcall_start) = .; \ 363 *(.security_initcall.init) \ 364 VMLINUX_SYMBOL(__security_initcall_end) = .; \ 365 } 366 367 /* .text section. Map to function alignment to avoid address changes 368 * during second ld run in second ld pass when generating System.map */ 369 #define TEXT_TEXT \ 370 ALIGN_FUNCTION(); \ 371 *(.text.hot) \ 372 *(.text) \ 373 *(.ref.text) \ 374 DEV_KEEP(init.text) \ 375 DEV_KEEP(exit.text) \ 376 CPU_KEEP(init.text) \ 377 CPU_KEEP(exit.text) \ 378 MEM_KEEP(init.text) \ 379 MEM_KEEP(exit.text) \ 380 *(.text.unlikely) 381 382 383 /* sched.text is aling to function alignment to secure we have same 384 * address even at second ld pass when generating System.map */ 385 #define SCHED_TEXT \ 386 ALIGN_FUNCTION(); \ 387 VMLINUX_SYMBOL(__sched_text_start) = .; \ 388 *(.sched.text) \ 389 VMLINUX_SYMBOL(__sched_text_end) = .; 390 391 /* spinlock.text is aling to function alignment to secure we have same 392 * address even at second ld pass when generating System.map */ 393 #define LOCK_TEXT \ 394 ALIGN_FUNCTION(); \ 395 VMLINUX_SYMBOL(__lock_text_start) = .; \ 396 *(.spinlock.text) \ 397 VMLINUX_SYMBOL(__lock_text_end) = .; 398 399 #define KPROBES_TEXT \ 400 ALIGN_FUNCTION(); \ 401 VMLINUX_SYMBOL(__kprobes_text_start) = .; \ 402 *(.kprobes.text) \ 403 VMLINUX_SYMBOL(__kprobes_text_end) = .; 404 405 #ifdef CONFIG_FUNCTION_GRAPH_TRACER 406 #define IRQENTRY_TEXT \ 407 ALIGN_FUNCTION(); \ 408 VMLINUX_SYMBOL(__irqentry_text_start) = .; \ 409 *(.irqentry.text) \ 410 VMLINUX_SYMBOL(__irqentry_text_end) = .; 411 #else 412 #define IRQENTRY_TEXT 413 #endif 414 415 /* Section used for early init (in .S files) */ 416 #define HEAD_TEXT *(.head.text) 417 418 #define HEAD_TEXT_SECTION \ 419 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \ 420 HEAD_TEXT \ 421 } 422 423 /* 424 * Exception table 425 */ 426 #define EXCEPTION_TABLE(align) \ 427 . = ALIGN(align); \ 428 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \ 429 VMLINUX_SYMBOL(__start___ex_table) = .; \ 430 *(__ex_table) \ 431 VMLINUX_SYMBOL(__stop___ex_table) = .; \ 432 } 433 434 /* 435 * Init task 436 */ 437 #define INIT_TASK_DATA(align) \ 438 . = ALIGN(align); \ 439 .data.init_task : { \ 440 INIT_TASK \ 441 } 442 443 /* init and exit section handling */ 444 #define INIT_DATA \ 445 *(.init.data) \ 446 DEV_DISCARD(init.data) \ 447 CPU_DISCARD(init.data) \ 448 MEM_DISCARD(init.data) \ 449 *(.init.rodata) \ 450 DEV_DISCARD(init.rodata) \ 451 CPU_DISCARD(init.rodata) \ 452 MEM_DISCARD(init.rodata) 453 454 #define INIT_TEXT \ 455 *(.init.text) \ 456 DEV_DISCARD(init.text) \ 457 CPU_DISCARD(init.text) \ 458 MEM_DISCARD(init.text) 459 460 #define EXIT_DATA \ 461 *(.exit.data) \ 462 DEV_DISCARD(exit.data) \ 463 DEV_DISCARD(exit.rodata) \ 464 CPU_DISCARD(exit.data) \ 465 CPU_DISCARD(exit.rodata) \ 466 MEM_DISCARD(exit.data) \ 467 MEM_DISCARD(exit.rodata) 468 469 #define EXIT_TEXT \ 470 *(.exit.text) \ 471 DEV_DISCARD(exit.text) \ 472 CPU_DISCARD(exit.text) \ 473 MEM_DISCARD(exit.text) 474 475 #define EXIT_CALL \ 476 *(.exitcall.exit) 477 478 /* 479 * bss (Block Started by Symbol) - uninitialized data 480 * zeroed during startup 481 */ 482 #define SBSS \ 483 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \ 484 *(.sbss) \ 485 *(.scommon) \ 486 } 487 488 #define BSS(bss_align) \ 489 . = ALIGN(bss_align); \ 490 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \ 491 VMLINUX_SYMBOL(__bss_start) = .; \ 492 *(.bss.page_aligned) \ 493 *(.dynbss) \ 494 *(.bss) \ 495 *(COMMON) \ 496 VMLINUX_SYMBOL(__bss_stop) = .; \ 497 } 498 499 /* 500 * DWARF debug sections. 501 * Symbols in the DWARF debugging sections are relative to 502 * the beginning of the section so we begin them at 0. 503 */ 504 #define DWARF_DEBUG \ 505 /* DWARF 1 */ \ 506 .debug 0 : { *(.debug) } \ 507 .line 0 : { *(.line) } \ 508 /* GNU DWARF 1 extensions */ \ 509 .debug_srcinfo 0 : { *(.debug_srcinfo) } \ 510 .debug_sfnames 0 : { *(.debug_sfnames) } \ 511 /* DWARF 1.1 and DWARF 2 */ \ 512 .debug_aranges 0 : { *(.debug_aranges) } \ 513 .debug_pubnames 0 : { *(.debug_pubnames) } \ 514 /* DWARF 2 */ \ 515 .debug_info 0 : { *(.debug_info \ 516 .gnu.linkonce.wi.*) } \ 517 .debug_abbrev 0 : { *(.debug_abbrev) } \ 518 .debug_line 0 : { *(.debug_line) } \ 519 .debug_frame 0 : { *(.debug_frame) } \ 520 .debug_str 0 : { *(.debug_str) } \ 521 .debug_loc 0 : { *(.debug_loc) } \ 522 .debug_macinfo 0 : { *(.debug_macinfo) } \ 523 /* SGI/MIPS DWARF 2 extensions */ \ 524 .debug_weaknames 0 : { *(.debug_weaknames) } \ 525 .debug_funcnames 0 : { *(.debug_funcnames) } \ 526 .debug_typenames 0 : { *(.debug_typenames) } \ 527 .debug_varnames 0 : { *(.debug_varnames) } \ 528 529 /* Stabs debugging sections. */ 530 #define STABS_DEBUG \ 531 .stab 0 : { *(.stab) } \ 532 .stabstr 0 : { *(.stabstr) } \ 533 .stab.excl 0 : { *(.stab.excl) } \ 534 .stab.exclstr 0 : { *(.stab.exclstr) } \ 535 .stab.index 0 : { *(.stab.index) } \ 536 .stab.indexstr 0 : { *(.stab.indexstr) } \ 537 .comment 0 : { *(.comment) } 538 539 #ifdef CONFIG_GENERIC_BUG 540 #define BUG_TABLE \ 541 . = ALIGN(8); \ 542 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \ 543 VMLINUX_SYMBOL(__start___bug_table) = .; \ 544 *(__bug_table) \ 545 VMLINUX_SYMBOL(__stop___bug_table) = .; \ 546 } 547 #else 548 #define BUG_TABLE 549 #endif 550 551 #ifdef CONFIG_PM_TRACE 552 #define TRACEDATA \ 553 . = ALIGN(4); \ 554 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \ 555 VMLINUX_SYMBOL(__tracedata_start) = .; \ 556 *(.tracedata) \ 557 VMLINUX_SYMBOL(__tracedata_end) = .; \ 558 } 559 #else 560 #define TRACEDATA 561 #endif 562 563 #define NOTES \ 564 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \ 565 VMLINUX_SYMBOL(__start_notes) = .; \ 566 *(.note.*) \ 567 VMLINUX_SYMBOL(__stop_notes) = .; \ 568 } 569 570 #define INIT_SETUP(initsetup_align) \ 571 . = ALIGN(initsetup_align); \ 572 VMLINUX_SYMBOL(__setup_start) = .; \ 573 *(.init.setup) \ 574 VMLINUX_SYMBOL(__setup_end) = .; 575 576 #define INITCALLS \ 577 *(.initcallearly.init) \ 578 VMLINUX_SYMBOL(__early_initcall_end) = .; \ 579 *(.initcall0.init) \ 580 *(.initcall0s.init) \ 581 *(.initcall1.init) \ 582 *(.initcall1s.init) \ 583 *(.initcall2.init) \ 584 *(.initcall2s.init) \ 585 *(.initcall3.init) \ 586 *(.initcall3s.init) \ 587 *(.initcall4.init) \ 588 *(.initcall4s.init) \ 589 *(.initcall5.init) \ 590 *(.initcall5s.init) \ 591 *(.initcallrootfs.init) \ 592 *(.initcall6.init) \ 593 *(.initcall6s.init) \ 594 *(.initcall7.init) \ 595 *(.initcall7s.init) 596 597 #define INIT_CALLS \ 598 VMLINUX_SYMBOL(__initcall_start) = .; \ 599 INITCALLS \ 600 VMLINUX_SYMBOL(__initcall_end) = .; 601 602 #define CON_INITCALL \ 603 VMLINUX_SYMBOL(__con_initcall_start) = .; \ 604 *(.con_initcall.init) \ 605 VMLINUX_SYMBOL(__con_initcall_end) = .; 606 607 #define SECURITY_INITCALL \ 608 VMLINUX_SYMBOL(__security_initcall_start) = .; \ 609 *(.security_initcall.init) \ 610 VMLINUX_SYMBOL(__security_initcall_end) = .; 611 612 #ifdef CONFIG_BLK_DEV_INITRD 613 #define INIT_RAM_FS \ 614 . = ALIGN(PAGE_SIZE); \ 615 VMLINUX_SYMBOL(__initramfs_start) = .; \ 616 *(.init.ramfs) \ 617 VMLINUX_SYMBOL(__initramfs_end) = .; 618 #else 619 #define INITRAMFS 620 #endif 621 622 /** 623 * PERCPU_VADDR - define output section for percpu area 624 * @vaddr: explicit base address (optional) 625 * @phdr: destination PHDR (optional) 626 * 627 * Macro which expands to output section for percpu area. If @vaddr 628 * is not blank, it specifies explicit base address and all percpu 629 * symbols will be offset from the given address. If blank, @vaddr 630 * always equals @laddr + LOAD_OFFSET. 631 * 632 * @phdr defines the output PHDR to use if not blank. Be warned that 633 * output PHDR is sticky. If @phdr is specified, the next output 634 * section in the linker script will go there too. @phdr should have 635 * a leading colon. 636 * 637 * Note that this macros defines __per_cpu_load as an absolute symbol. 638 * If there is no need to put the percpu section at a predetermined 639 * address, use PERCPU(). 640 */ 641 #define PERCPU_VADDR(vaddr, phdr) \ 642 VMLINUX_SYMBOL(__per_cpu_load) = .; \ 643 .data.percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \ 644 - LOAD_OFFSET) { \ 645 VMLINUX_SYMBOL(__per_cpu_start) = .; \ 646 *(.data.percpu.first) \ 647 *(.data.percpu.page_aligned) \ 648 *(.data.percpu) \ 649 *(.data.percpu.shared_aligned) \ 650 VMLINUX_SYMBOL(__per_cpu_end) = .; \ 651 } phdr \ 652 . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data.percpu); 653 654 /** 655 * PERCPU - define output section for percpu area, simple version 656 * @align: required alignment 657 * 658 * Align to @align and outputs output section for percpu area. This 659 * macro doesn't maniuplate @vaddr or @phdr and __per_cpu_load and 660 * __per_cpu_start will be identical. 661 * 662 * This macro is equivalent to ALIGN(align); PERCPU_VADDR( , ) except 663 * that __per_cpu_load is defined as a relative symbol against 664 * .data.percpu which is required for relocatable x86_32 665 * configuration. 666 */ 667 #define PERCPU(align) \ 668 . = ALIGN(align); \ 669 .data.percpu : AT(ADDR(.data.percpu) - LOAD_OFFSET) { \ 670 VMLINUX_SYMBOL(__per_cpu_load) = .; \ 671 VMLINUX_SYMBOL(__per_cpu_start) = .; \ 672 *(.data.percpu.first) \ 673 *(.data.percpu.page_aligned) \ 674 *(.data.percpu) \ 675 *(.data.percpu.shared_aligned) \ 676 VMLINUX_SYMBOL(__per_cpu_end) = .; \ 677 } 678 679 680 /* 681 * Definition of the high level *_SECTION macros 682 * They will fit only a subset of the architectures 683 */ 684 685 686 /* 687 * Writeable data. 688 * All sections are combined in a single .data section. 689 * The sections following CONSTRUCTORS are arranged so their 690 * typical alignment matches. 691 * A cacheline is typical/always less than a PAGE_SIZE so 692 * the sections that has this restriction (or similar) 693 * is located before the ones requiring PAGE_SIZE alignment. 694 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which 695 * matches the requirment of PAGE_ALIGNED_DATA. 696 * 697 * use 0 as page_align if page_aligned data is not used */ 698 #define RW_DATA_SECTION(cacheline, nosave, pagealigned, inittask) \ 699 . = ALIGN(PAGE_SIZE); \ 700 .data : AT(ADDR(.data) - LOAD_OFFSET) { \ 701 INIT_TASK(inittask) \ 702 CACHELINE_ALIGNED_DATA(cacheline) \ 703 READ_MOSTLY_DATA(cacheline) \ 704 DATA_DATA \ 705 CONSTRUCTORS \ 706 NOSAVE_DATA(nosave) \ 707 PAGE_ALIGNED_DATA(pagealigned) \ 708 } 709 710 #define INIT_TEXT_SECTION(inittext_align) \ 711 . = ALIGN(inittext_align); \ 712 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \ 713 VMLINUX_SYMBOL(_sinittext) = .; \ 714 INIT_TEXT \ 715 VMLINUX_SYMBOL(_einittext) = .; \ 716 } 717 718 #define INIT_DATA_SECTION(initsetup_align) \ 719 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \ 720 INIT_DATA \ 721 INIT_SETUP(initsetup_align) \ 722 INIT_CALLS \ 723 CON_INITCALL \ 724 SECURITY_INITCALL \ 725 INIT_RAM_FS \ 726 } 727 728 #define BSS_SECTION(sbss_align, bss_align) \ 729 SBSS \ 730 BSS(bss_align) \ 731 . = ALIGN(4); 732 733