1 /* 2 * Helper macros to support writing architecture specific 3 * linker scripts. 4 * 5 * A minimal linker scripts has following content: 6 * [This is a sample, architectures may have special requiriements] 7 * 8 * OUTPUT_FORMAT(...) 9 * OUTPUT_ARCH(...) 10 * ENTRY(...) 11 * SECTIONS 12 * { 13 * . = START; 14 * __init_begin = .; 15 * HEAD_TEXT_SECTION 16 * INIT_TEXT_SECTION(PAGE_SIZE) 17 * INIT_DATA_SECTION(...) 18 * PERCPU(PAGE_SIZE) 19 * __init_end = .; 20 * 21 * _stext = .; 22 * TEXT_SECTION = 0 23 * _etext = .; 24 * 25 * _sdata = .; 26 * RO_DATA_SECTION(PAGE_SIZE) 27 * RW_DATA_SECTION(...) 28 * _edata = .; 29 * 30 * EXCEPTION_TABLE(...) 31 * NOTES 32 * 33 * BSS_SECTION(0, 0, 0) 34 * _end = .; 35 * 36 * STABS_DEBUG 37 * DWARF_DEBUG 38 * 39 * DISCARDS // must be the last 40 * } 41 * 42 * [__init_begin, __init_end] is the init section that may be freed after init 43 * [_stext, _etext] is the text section 44 * [_sdata, _edata] is the data section 45 * 46 * Some of the included output section have their own set of constants. 47 * Examples are: [__initramfs_start, __initramfs_end] for initramfs and 48 * [__nosave_begin, __nosave_end] for the nosave data 49 */ 50 51 #ifndef LOAD_OFFSET 52 #define LOAD_OFFSET 0 53 #endif 54 55 #ifndef SYMBOL_PREFIX 56 #define VMLINUX_SYMBOL(sym) sym 57 #else 58 #define PASTE2(x,y) x##y 59 #define PASTE(x,y) PASTE2(x,y) 60 #define VMLINUX_SYMBOL(sym) PASTE(SYMBOL_PREFIX, sym) 61 #endif 62 63 /* Align . to a 8 byte boundary equals to maximum function alignment. */ 64 #define ALIGN_FUNCTION() . = ALIGN(8) 65 66 /* The actual configuration determine if the init/exit sections 67 * are handled as text/data or they can be discarded (which 68 * often happens at runtime) 69 */ 70 #ifdef CONFIG_HOTPLUG 71 #define DEV_KEEP(sec) *(.dev##sec) 72 #define DEV_DISCARD(sec) 73 #else 74 #define DEV_KEEP(sec) 75 #define DEV_DISCARD(sec) *(.dev##sec) 76 #endif 77 78 #ifdef CONFIG_HOTPLUG_CPU 79 #define CPU_KEEP(sec) *(.cpu##sec) 80 #define CPU_DISCARD(sec) 81 #else 82 #define CPU_KEEP(sec) 83 #define CPU_DISCARD(sec) *(.cpu##sec) 84 #endif 85 86 #if defined(CONFIG_MEMORY_HOTPLUG) 87 #define MEM_KEEP(sec) *(.mem##sec) 88 #define MEM_DISCARD(sec) 89 #else 90 #define MEM_KEEP(sec) 91 #define MEM_DISCARD(sec) *(.mem##sec) 92 #endif 93 94 #ifdef CONFIG_FTRACE_MCOUNT_RECORD 95 #define MCOUNT_REC() . = ALIGN(8); \ 96 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_DATA(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 DEV_KEEP(init.rodata) \ 337 DEV_KEEP(exit.rodata) \ 338 CPU_KEEP(init.rodata) \ 339 CPU_KEEP(exit.rodata) \ 340 MEM_KEEP(init.rodata) \ 341 MEM_KEEP(exit.rodata) \ 342 } \ 343 \ 344 /* Built-in module parameters. */ \ 345 __param : AT(ADDR(__param) - LOAD_OFFSET) { \ 346 VMLINUX_SYMBOL(__start___param) = .; \ 347 *(__param) \ 348 VMLINUX_SYMBOL(__stop___param) = .; \ 349 . = ALIGN((align)); \ 350 VMLINUX_SYMBOL(__end_rodata) = .; \ 351 } \ 352 . = ALIGN((align)); 353 354 /* RODATA & RO_DATA provided for backward compatibility. 355 * All archs are supposed to use RO_DATA() */ 356 #define RODATA RO_DATA_SECTION(4096) 357 #define RO_DATA(align) RO_DATA_SECTION(align) 358 359 #define SECURITY_INIT \ 360 .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \ 361 VMLINUX_SYMBOL(__security_initcall_start) = .; \ 362 *(.security_initcall.init) \ 363 VMLINUX_SYMBOL(__security_initcall_end) = .; \ 364 } 365 366 /* .text section. Map to function alignment to avoid address changes 367 * during second ld run in second ld pass when generating System.map */ 368 #define TEXT_TEXT \ 369 ALIGN_FUNCTION(); \ 370 *(.text.hot) \ 371 *(.text) \ 372 *(.ref.text) \ 373 DEV_KEEP(init.text) \ 374 DEV_KEEP(exit.text) \ 375 CPU_KEEP(init.text) \ 376 CPU_KEEP(exit.text) \ 377 MEM_KEEP(init.text) \ 378 MEM_KEEP(exit.text) \ 379 *(.text.unlikely) 380 381 382 /* sched.text is aling to function alignment to secure we have same 383 * address even at second ld pass when generating System.map */ 384 #define SCHED_TEXT \ 385 ALIGN_FUNCTION(); \ 386 VMLINUX_SYMBOL(__sched_text_start) = .; \ 387 *(.sched.text) \ 388 VMLINUX_SYMBOL(__sched_text_end) = .; 389 390 /* spinlock.text is aling to function alignment to secure we have same 391 * address even at second ld pass when generating System.map */ 392 #define LOCK_TEXT \ 393 ALIGN_FUNCTION(); \ 394 VMLINUX_SYMBOL(__lock_text_start) = .; \ 395 *(.spinlock.text) \ 396 VMLINUX_SYMBOL(__lock_text_end) = .; 397 398 #define KPROBES_TEXT \ 399 ALIGN_FUNCTION(); \ 400 VMLINUX_SYMBOL(__kprobes_text_start) = .; \ 401 *(.kprobes.text) \ 402 VMLINUX_SYMBOL(__kprobes_text_end) = .; 403 404 #ifdef CONFIG_FUNCTION_GRAPH_TRACER 405 #define IRQENTRY_TEXT \ 406 ALIGN_FUNCTION(); \ 407 VMLINUX_SYMBOL(__irqentry_text_start) = .; \ 408 *(.irqentry.text) \ 409 VMLINUX_SYMBOL(__irqentry_text_end) = .; 410 #else 411 #define IRQENTRY_TEXT 412 #endif 413 414 /* Section used for early init (in .S files) */ 415 #define HEAD_TEXT *(.head.text) 416 417 #define HEAD_TEXT_SECTION \ 418 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \ 419 HEAD_TEXT \ 420 } 421 422 /* 423 * Exception table 424 */ 425 #define EXCEPTION_TABLE(align) \ 426 . = ALIGN(align); \ 427 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \ 428 VMLINUX_SYMBOL(__start___ex_table) = .; \ 429 *(__ex_table) \ 430 VMLINUX_SYMBOL(__stop___ex_table) = .; \ 431 } 432 433 /* 434 * Init task 435 */ 436 #define INIT_TASK_DATA_SECTION(align) \ 437 . = ALIGN(align); \ 438 .data.init_task : { \ 439 INIT_TASK_DATA(align) \ 440 } 441 442 #ifdef CONFIG_CONSTRUCTORS 443 #define KERNEL_CTORS() . = ALIGN(8); \ 444 VMLINUX_SYMBOL(__ctors_start) = .; \ 445 *(.ctors) \ 446 VMLINUX_SYMBOL(__ctors_end) = .; 447 #else 448 #define KERNEL_CTORS() 449 #endif 450 451 /* init and exit section handling */ 452 #define INIT_DATA \ 453 *(.init.data) \ 454 DEV_DISCARD(init.data) \ 455 CPU_DISCARD(init.data) \ 456 MEM_DISCARD(init.data) \ 457 KERNEL_CTORS() \ 458 *(.init.rodata) \ 459 MCOUNT_REC() \ 460 DEV_DISCARD(init.rodata) \ 461 CPU_DISCARD(init.rodata) \ 462 MEM_DISCARD(init.rodata) 463 464 #define INIT_TEXT \ 465 *(.init.text) \ 466 DEV_DISCARD(init.text) \ 467 CPU_DISCARD(init.text) \ 468 MEM_DISCARD(init.text) 469 470 #define EXIT_DATA \ 471 *(.exit.data) \ 472 DEV_DISCARD(exit.data) \ 473 DEV_DISCARD(exit.rodata) \ 474 CPU_DISCARD(exit.data) \ 475 CPU_DISCARD(exit.rodata) \ 476 MEM_DISCARD(exit.data) \ 477 MEM_DISCARD(exit.rodata) 478 479 #define EXIT_TEXT \ 480 *(.exit.text) \ 481 DEV_DISCARD(exit.text) \ 482 CPU_DISCARD(exit.text) \ 483 MEM_DISCARD(exit.text) 484 485 #define EXIT_CALL \ 486 *(.exitcall.exit) 487 488 /* 489 * bss (Block Started by Symbol) - uninitialized data 490 * zeroed during startup 491 */ 492 #define SBSS(sbss_align) \ 493 . = ALIGN(sbss_align); \ 494 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \ 495 *(.sbss) \ 496 *(.scommon) \ 497 } 498 499 #define BSS(bss_align) \ 500 . = ALIGN(bss_align); \ 501 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \ 502 *(.bss.page_aligned) \ 503 *(.dynbss) \ 504 *(.bss) \ 505 *(COMMON) \ 506 } 507 508 /* 509 * DWARF debug sections. 510 * Symbols in the DWARF debugging sections are relative to 511 * the beginning of the section so we begin them at 0. 512 */ 513 #define DWARF_DEBUG \ 514 /* DWARF 1 */ \ 515 .debug 0 : { *(.debug) } \ 516 .line 0 : { *(.line) } \ 517 /* GNU DWARF 1 extensions */ \ 518 .debug_srcinfo 0 : { *(.debug_srcinfo) } \ 519 .debug_sfnames 0 : { *(.debug_sfnames) } \ 520 /* DWARF 1.1 and DWARF 2 */ \ 521 .debug_aranges 0 : { *(.debug_aranges) } \ 522 .debug_pubnames 0 : { *(.debug_pubnames) } \ 523 /* DWARF 2 */ \ 524 .debug_info 0 : { *(.debug_info \ 525 .gnu.linkonce.wi.*) } \ 526 .debug_abbrev 0 : { *(.debug_abbrev) } \ 527 .debug_line 0 : { *(.debug_line) } \ 528 .debug_frame 0 : { *(.debug_frame) } \ 529 .debug_str 0 : { *(.debug_str) } \ 530 .debug_loc 0 : { *(.debug_loc) } \ 531 .debug_macinfo 0 : { *(.debug_macinfo) } \ 532 /* SGI/MIPS DWARF 2 extensions */ \ 533 .debug_weaknames 0 : { *(.debug_weaknames) } \ 534 .debug_funcnames 0 : { *(.debug_funcnames) } \ 535 .debug_typenames 0 : { *(.debug_typenames) } \ 536 .debug_varnames 0 : { *(.debug_varnames) } \ 537 538 /* Stabs debugging sections. */ 539 #define STABS_DEBUG \ 540 .stab 0 : { *(.stab) } \ 541 .stabstr 0 : { *(.stabstr) } \ 542 .stab.excl 0 : { *(.stab.excl) } \ 543 .stab.exclstr 0 : { *(.stab.exclstr) } \ 544 .stab.index 0 : { *(.stab.index) } \ 545 .stab.indexstr 0 : { *(.stab.indexstr) } \ 546 .comment 0 : { *(.comment) } 547 548 #ifdef CONFIG_GENERIC_BUG 549 #define BUG_TABLE \ 550 . = ALIGN(8); \ 551 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \ 552 VMLINUX_SYMBOL(__start___bug_table) = .; \ 553 *(__bug_table) \ 554 VMLINUX_SYMBOL(__stop___bug_table) = .; \ 555 } 556 #else 557 #define BUG_TABLE 558 #endif 559 560 #ifdef CONFIG_PM_TRACE 561 #define TRACEDATA \ 562 . = ALIGN(4); \ 563 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \ 564 VMLINUX_SYMBOL(__tracedata_start) = .; \ 565 *(.tracedata) \ 566 VMLINUX_SYMBOL(__tracedata_end) = .; \ 567 } 568 #else 569 #define TRACEDATA 570 #endif 571 572 #define NOTES \ 573 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \ 574 VMLINUX_SYMBOL(__start_notes) = .; \ 575 *(.note.*) \ 576 VMLINUX_SYMBOL(__stop_notes) = .; \ 577 } 578 579 #define INIT_SETUP(initsetup_align) \ 580 . = ALIGN(initsetup_align); \ 581 VMLINUX_SYMBOL(__setup_start) = .; \ 582 *(.init.setup) \ 583 VMLINUX_SYMBOL(__setup_end) = .; 584 585 #define INITCALLS \ 586 *(.initcallearly.init) \ 587 VMLINUX_SYMBOL(__early_initcall_end) = .; \ 588 *(.initcall0.init) \ 589 *(.initcall0s.init) \ 590 *(.initcall1.init) \ 591 *(.initcall1s.init) \ 592 *(.initcall2.init) \ 593 *(.initcall2s.init) \ 594 *(.initcall3.init) \ 595 *(.initcall3s.init) \ 596 *(.initcall4.init) \ 597 *(.initcall4s.init) \ 598 *(.initcall5.init) \ 599 *(.initcall5s.init) \ 600 *(.initcallrootfs.init) \ 601 *(.initcall6.init) \ 602 *(.initcall6s.init) \ 603 *(.initcall7.init) \ 604 *(.initcall7s.init) 605 606 #define INIT_CALLS \ 607 VMLINUX_SYMBOL(__initcall_start) = .; \ 608 INITCALLS \ 609 VMLINUX_SYMBOL(__initcall_end) = .; 610 611 #define CON_INITCALL \ 612 VMLINUX_SYMBOL(__con_initcall_start) = .; \ 613 *(.con_initcall.init) \ 614 VMLINUX_SYMBOL(__con_initcall_end) = .; 615 616 #define SECURITY_INITCALL \ 617 VMLINUX_SYMBOL(__security_initcall_start) = .; \ 618 *(.security_initcall.init) \ 619 VMLINUX_SYMBOL(__security_initcall_end) = .; 620 621 #ifdef CONFIG_BLK_DEV_INITRD 622 #define INIT_RAM_FS \ 623 . = ALIGN(PAGE_SIZE); \ 624 VMLINUX_SYMBOL(__initramfs_start) = .; \ 625 *(.init.ramfs) \ 626 VMLINUX_SYMBOL(__initramfs_end) = .; 627 #else 628 #define INIT_RAM_FS 629 #endif 630 631 /* 632 * Default discarded sections. 633 * 634 * Some archs want to discard exit text/data at runtime rather than 635 * link time due to cross-section references such as alt instructions, 636 * bug table, eh_frame, etc. DISCARDS must be the last of output 637 * section definitions so that such archs put those in earlier section 638 * definitions. 639 */ 640 #define DISCARDS \ 641 /DISCARD/ : { \ 642 EXIT_TEXT \ 643 EXIT_DATA \ 644 EXIT_CALL \ 645 *(.discard) \ 646 } 647 648 /** 649 * PERCPU_VADDR - define output section for percpu area 650 * @vaddr: explicit base address (optional) 651 * @phdr: destination PHDR (optional) 652 * 653 * Macro which expands to output section for percpu area. If @vaddr 654 * is not blank, it specifies explicit base address and all percpu 655 * symbols will be offset from the given address. If blank, @vaddr 656 * always equals @laddr + LOAD_OFFSET. 657 * 658 * @phdr defines the output PHDR to use if not blank. Be warned that 659 * output PHDR is sticky. If @phdr is specified, the next output 660 * section in the linker script will go there too. @phdr should have 661 * a leading colon. 662 * 663 * Note that this macros defines __per_cpu_load as an absolute symbol. 664 * If there is no need to put the percpu section at a predetermined 665 * address, use PERCPU(). 666 */ 667 #define PERCPU_VADDR(vaddr, phdr) \ 668 VMLINUX_SYMBOL(__per_cpu_load) = .; \ 669 .data.percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \ 670 - LOAD_OFFSET) { \ 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 } phdr \ 678 . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data.percpu); 679 680 /** 681 * PERCPU - define output section for percpu area, simple version 682 * @align: required alignment 683 * 684 * Align to @align and outputs output section for percpu area. This 685 * macro doesn't maniuplate @vaddr or @phdr and __per_cpu_load and 686 * __per_cpu_start will be identical. 687 * 688 * This macro is equivalent to ALIGN(align); PERCPU_VADDR( , ) except 689 * that __per_cpu_load is defined as a relative symbol against 690 * .data.percpu which is required for relocatable x86_32 691 * configuration. 692 */ 693 #define PERCPU(align) \ 694 . = ALIGN(align); \ 695 .data.percpu : AT(ADDR(.data.percpu) - LOAD_OFFSET) { \ 696 VMLINUX_SYMBOL(__per_cpu_load) = .; \ 697 VMLINUX_SYMBOL(__per_cpu_start) = .; \ 698 *(.data.percpu.first) \ 699 *(.data.percpu.page_aligned) \ 700 *(.data.percpu) \ 701 *(.data.percpu.shared_aligned) \ 702 VMLINUX_SYMBOL(__per_cpu_end) = .; \ 703 } 704 705 706 /* 707 * Definition of the high level *_SECTION macros 708 * They will fit only a subset of the architectures 709 */ 710 711 712 /* 713 * Writeable data. 714 * All sections are combined in a single .data section. 715 * The sections following CONSTRUCTORS are arranged so their 716 * typical alignment matches. 717 * A cacheline is typical/always less than a PAGE_SIZE so 718 * the sections that has this restriction (or similar) 719 * is located before the ones requiring PAGE_SIZE alignment. 720 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which 721 * matches the requirment of PAGE_ALIGNED_DATA. 722 * 723 * use 0 as page_align if page_aligned data is not used */ 724 #define RW_DATA_SECTION(cacheline, pagealigned, inittask) \ 725 . = ALIGN(PAGE_SIZE); \ 726 .data : AT(ADDR(.data) - LOAD_OFFSET) { \ 727 INIT_TASK_DATA(inittask) \ 728 NOSAVE_DATA \ 729 PAGE_ALIGNED_DATA(pagealigned) \ 730 CACHELINE_ALIGNED_DATA(cacheline) \ 731 READ_MOSTLY_DATA(cacheline) \ 732 DATA_DATA \ 733 CONSTRUCTORS \ 734 } 735 736 #define INIT_TEXT_SECTION(inittext_align) \ 737 . = ALIGN(inittext_align); \ 738 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \ 739 VMLINUX_SYMBOL(_sinittext) = .; \ 740 INIT_TEXT \ 741 VMLINUX_SYMBOL(_einittext) = .; \ 742 } 743 744 #define INIT_DATA_SECTION(initsetup_align) \ 745 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \ 746 INIT_DATA \ 747 INIT_SETUP(initsetup_align) \ 748 INIT_CALLS \ 749 CON_INITCALL \ 750 SECURITY_INITCALL \ 751 INIT_RAM_FS \ 752 } 753 754 #define BSS_SECTION(sbss_align, bss_align, stop_align) \ 755 . = ALIGN(sbss_align); \ 756 VMLINUX_SYMBOL(__bss_start) = .; \ 757 SBSS(sbss_align) \ 758 BSS(bss_align) \ 759 . = ALIGN(stop_align); \ 760 VMLINUX_SYMBOL(__bss_stop) = .; 761