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 #include <linux/export.h> 56 57 /* Align . to a 8 byte boundary equals to maximum function alignment. */ 58 #define ALIGN_FUNCTION() . = ALIGN(8) 59 60 /* 61 * Align to a 32 byte boundary equal to the 62 * alignment gcc 4.5 uses for a struct 63 */ 64 #define STRUCT_ALIGNMENT 32 65 #define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT) 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_CPU 72 #define CPU_KEEP(sec) *(.cpu##sec) 73 #define CPU_DISCARD(sec) 74 #else 75 #define CPU_KEEP(sec) 76 #define CPU_DISCARD(sec) *(.cpu##sec) 77 #endif 78 79 #if defined(CONFIG_MEMORY_HOTPLUG) 80 #define MEM_KEEP(sec) *(.mem##sec) 81 #define MEM_DISCARD(sec) 82 #else 83 #define MEM_KEEP(sec) 84 #define MEM_DISCARD(sec) *(.mem##sec) 85 #endif 86 87 #ifdef CONFIG_FTRACE_MCOUNT_RECORD 88 #define MCOUNT_REC() . = ALIGN(8); \ 89 VMLINUX_SYMBOL(__start_mcount_loc) = .; \ 90 *(__mcount_loc) \ 91 VMLINUX_SYMBOL(__stop_mcount_loc) = .; 92 #else 93 #define MCOUNT_REC() 94 #endif 95 96 #ifdef CONFIG_TRACE_BRANCH_PROFILING 97 #define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \ 98 *(_ftrace_annotated_branch) \ 99 VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .; 100 #else 101 #define LIKELY_PROFILE() 102 #endif 103 104 #ifdef CONFIG_PROFILE_ALL_BRANCHES 105 #define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \ 106 *(_ftrace_branch) \ 107 VMLINUX_SYMBOL(__stop_branch_profile) = .; 108 #else 109 #define BRANCH_PROFILE() 110 #endif 111 112 #ifdef CONFIG_EVENT_TRACING 113 #define FTRACE_EVENTS() . = ALIGN(8); \ 114 VMLINUX_SYMBOL(__start_ftrace_events) = .; \ 115 *(_ftrace_events) \ 116 VMLINUX_SYMBOL(__stop_ftrace_events) = .; 117 #else 118 #define FTRACE_EVENTS() 119 #endif 120 121 #ifdef CONFIG_TRACING 122 #define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \ 123 *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \ 124 VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .; 125 #else 126 #define TRACE_PRINTKS() 127 #endif 128 129 #ifdef CONFIG_FTRACE_SYSCALLS 130 #define TRACE_SYSCALLS() . = ALIGN(8); \ 131 VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \ 132 *(__syscalls_metadata) \ 133 VMLINUX_SYMBOL(__stop_syscalls_metadata) = .; 134 #else 135 #define TRACE_SYSCALLS() 136 #endif 137 138 #ifdef CONFIG_CLKSRC_OF 139 #define CLKSRC_OF_TABLES() . = ALIGN(8); \ 140 VMLINUX_SYMBOL(__clksrc_of_table) = .; \ 141 *(__clksrc_of_table) \ 142 *(__clksrc_of_table_end) 143 #else 144 #define CLKSRC_OF_TABLES() 145 #endif 146 147 #ifdef CONFIG_IRQCHIP 148 #define IRQCHIP_OF_MATCH_TABLE() \ 149 . = ALIGN(8); \ 150 VMLINUX_SYMBOL(__irqchip_begin) = .; \ 151 *(__irqchip_of_table) \ 152 *(__irqchip_of_end) 153 #else 154 #define IRQCHIP_OF_MATCH_TABLE() 155 #endif 156 157 #ifdef CONFIG_COMMON_CLK 158 #define CLK_OF_TABLES() . = ALIGN(8); \ 159 VMLINUX_SYMBOL(__clk_of_table) = .; \ 160 *(__clk_of_table) \ 161 *(__clk_of_table_end) 162 #else 163 #define CLK_OF_TABLES() 164 #endif 165 166 #define KERNEL_DTB() \ 167 STRUCT_ALIGN(); \ 168 VMLINUX_SYMBOL(__dtb_start) = .; \ 169 *(.dtb.init.rodata) \ 170 VMLINUX_SYMBOL(__dtb_end) = .; 171 172 /* .data section */ 173 #define DATA_DATA \ 174 *(.data) \ 175 *(.ref.data) \ 176 *(.data..shared_aligned) /* percpu related */ \ 177 CPU_KEEP(init.data) \ 178 CPU_KEEP(exit.data) \ 179 MEM_KEEP(init.data) \ 180 MEM_KEEP(exit.data) \ 181 *(.data.unlikely) \ 182 STRUCT_ALIGN(); \ 183 *(__tracepoints) \ 184 /* implement dynamic printk debug */ \ 185 . = ALIGN(8); \ 186 VMLINUX_SYMBOL(__start___jump_table) = .; \ 187 *(__jump_table) \ 188 VMLINUX_SYMBOL(__stop___jump_table) = .; \ 189 . = ALIGN(8); \ 190 VMLINUX_SYMBOL(__start___verbose) = .; \ 191 *(__verbose) \ 192 VMLINUX_SYMBOL(__stop___verbose) = .; \ 193 LIKELY_PROFILE() \ 194 BRANCH_PROFILE() \ 195 TRACE_PRINTKS() 196 197 /* 198 * Data section helpers 199 */ 200 #define NOSAVE_DATA \ 201 . = ALIGN(PAGE_SIZE); \ 202 VMLINUX_SYMBOL(__nosave_begin) = .; \ 203 *(.data..nosave) \ 204 . = ALIGN(PAGE_SIZE); \ 205 VMLINUX_SYMBOL(__nosave_end) = .; 206 207 #define PAGE_ALIGNED_DATA(page_align) \ 208 . = ALIGN(page_align); \ 209 *(.data..page_aligned) 210 211 #define READ_MOSTLY_DATA(align) \ 212 . = ALIGN(align); \ 213 *(.data..read_mostly) \ 214 . = ALIGN(align); 215 216 #define CACHELINE_ALIGNED_DATA(align) \ 217 . = ALIGN(align); \ 218 *(.data..cacheline_aligned) 219 220 #define INIT_TASK_DATA(align) \ 221 . = ALIGN(align); \ 222 *(.data..init_task) 223 224 /* 225 * Read only Data 226 */ 227 #define RO_DATA_SECTION(align) \ 228 . = ALIGN((align)); \ 229 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \ 230 VMLINUX_SYMBOL(__start_rodata) = .; \ 231 *(.rodata) *(.rodata.*) \ 232 *(__vermagic) /* Kernel version magic */ \ 233 . = ALIGN(8); \ 234 VMLINUX_SYMBOL(__start___tracepoints_ptrs) = .; \ 235 *(__tracepoints_ptrs) /* Tracepoints: pointer array */\ 236 VMLINUX_SYMBOL(__stop___tracepoints_ptrs) = .; \ 237 *(__tracepoints_strings)/* Tracepoints: strings */ \ 238 } \ 239 \ 240 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \ 241 *(.rodata1) \ 242 } \ 243 \ 244 BUG_TABLE \ 245 \ 246 /* PCI quirks */ \ 247 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \ 248 VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \ 249 *(.pci_fixup_early) \ 250 VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \ 251 VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \ 252 *(.pci_fixup_header) \ 253 VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \ 254 VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \ 255 *(.pci_fixup_final) \ 256 VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \ 257 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \ 258 *(.pci_fixup_enable) \ 259 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \ 260 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \ 261 *(.pci_fixup_resume) \ 262 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \ 263 VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \ 264 *(.pci_fixup_resume_early) \ 265 VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \ 266 VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \ 267 *(.pci_fixup_suspend) \ 268 VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \ 269 } \ 270 \ 271 /* Built-in firmware blobs */ \ 272 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \ 273 VMLINUX_SYMBOL(__start_builtin_fw) = .; \ 274 *(.builtin_fw) \ 275 VMLINUX_SYMBOL(__end_builtin_fw) = .; \ 276 } \ 277 \ 278 TRACEDATA \ 279 \ 280 /* Kernel symbol table: Normal symbols */ \ 281 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \ 282 VMLINUX_SYMBOL(__start___ksymtab) = .; \ 283 *(SORT(___ksymtab+*)) \ 284 VMLINUX_SYMBOL(__stop___ksymtab) = .; \ 285 } \ 286 \ 287 /* Kernel symbol table: GPL-only symbols */ \ 288 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \ 289 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \ 290 *(SORT(___ksymtab_gpl+*)) \ 291 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \ 292 } \ 293 \ 294 /* Kernel symbol table: Normal unused symbols */ \ 295 __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \ 296 VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \ 297 *(SORT(___ksymtab_unused+*)) \ 298 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \ 299 } \ 300 \ 301 /* Kernel symbol table: GPL-only unused symbols */ \ 302 __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \ 303 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \ 304 *(SORT(___ksymtab_unused_gpl+*)) \ 305 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \ 306 } \ 307 \ 308 /* Kernel symbol table: GPL-future-only symbols */ \ 309 __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \ 310 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \ 311 *(SORT(___ksymtab_gpl_future+*)) \ 312 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \ 313 } \ 314 \ 315 /* Kernel symbol table: Normal symbols */ \ 316 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \ 317 VMLINUX_SYMBOL(__start___kcrctab) = .; \ 318 *(SORT(___kcrctab+*)) \ 319 VMLINUX_SYMBOL(__stop___kcrctab) = .; \ 320 } \ 321 \ 322 /* Kernel symbol table: GPL-only symbols */ \ 323 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \ 324 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \ 325 *(SORT(___kcrctab_gpl+*)) \ 326 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \ 327 } \ 328 \ 329 /* Kernel symbol table: Normal unused symbols */ \ 330 __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \ 331 VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \ 332 *(SORT(___kcrctab_unused+*)) \ 333 VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \ 334 } \ 335 \ 336 /* Kernel symbol table: GPL-only unused symbols */ \ 337 __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \ 338 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \ 339 *(SORT(___kcrctab_unused_gpl+*)) \ 340 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \ 341 } \ 342 \ 343 /* Kernel symbol table: GPL-future-only symbols */ \ 344 __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \ 345 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \ 346 *(SORT(___kcrctab_gpl_future+*)) \ 347 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \ 348 } \ 349 \ 350 /* Kernel symbol table: strings */ \ 351 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \ 352 *(__ksymtab_strings) \ 353 } \ 354 \ 355 /* __*init sections */ \ 356 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \ 357 *(.ref.rodata) \ 358 CPU_KEEP(init.rodata) \ 359 CPU_KEEP(exit.rodata) \ 360 MEM_KEEP(init.rodata) \ 361 MEM_KEEP(exit.rodata) \ 362 } \ 363 \ 364 /* Built-in module parameters. */ \ 365 __param : AT(ADDR(__param) - LOAD_OFFSET) { \ 366 VMLINUX_SYMBOL(__start___param) = .; \ 367 *(__param) \ 368 VMLINUX_SYMBOL(__stop___param) = .; \ 369 } \ 370 \ 371 /* Built-in module versions. */ \ 372 __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \ 373 VMLINUX_SYMBOL(__start___modver) = .; \ 374 *(__modver) \ 375 VMLINUX_SYMBOL(__stop___modver) = .; \ 376 . = ALIGN((align)); \ 377 VMLINUX_SYMBOL(__end_rodata) = .; \ 378 } \ 379 . = ALIGN((align)); 380 381 /* RODATA & RO_DATA provided for backward compatibility. 382 * All archs are supposed to use RO_DATA() */ 383 #define RODATA RO_DATA_SECTION(4096) 384 #define RO_DATA(align) RO_DATA_SECTION(align) 385 386 #define SECURITY_INIT \ 387 .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \ 388 VMLINUX_SYMBOL(__security_initcall_start) = .; \ 389 *(.security_initcall.init) \ 390 VMLINUX_SYMBOL(__security_initcall_end) = .; \ 391 } 392 393 /* .text section. Map to function alignment to avoid address changes 394 * during second ld run in second ld pass when generating System.map */ 395 #define TEXT_TEXT \ 396 ALIGN_FUNCTION(); \ 397 *(.text.hot) \ 398 *(.text) \ 399 *(.ref.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 CPU_DISCARD(init.data) \ 486 MEM_DISCARD(init.data) \ 487 KERNEL_CTORS() \ 488 MCOUNT_REC() \ 489 *(.init.rodata) \ 490 FTRACE_EVENTS() \ 491 TRACE_SYSCALLS() \ 492 CPU_DISCARD(init.rodata) \ 493 MEM_DISCARD(init.rodata) \ 494 CLK_OF_TABLES() \ 495 CLKSRC_OF_TABLES() \ 496 KERNEL_DTB() \ 497 IRQCHIP_OF_MATCH_TABLE() 498 499 #define INIT_TEXT \ 500 *(.init.text) \ 501 CPU_DISCARD(init.text) \ 502 MEM_DISCARD(init.text) 503 504 #define EXIT_DATA \ 505 *(.exit.data) \ 506 CPU_DISCARD(exit.data) \ 507 CPU_DISCARD(exit.rodata) \ 508 MEM_DISCARD(exit.data) \ 509 MEM_DISCARD(exit.rodata) 510 511 #define EXIT_TEXT \ 512 *(.exit.text) \ 513 CPU_DISCARD(exit.text) \ 514 MEM_DISCARD(exit.text) 515 516 #define EXIT_CALL \ 517 *(.exitcall.exit) 518 519 /* 520 * bss (Block Started by Symbol) - uninitialized data 521 * zeroed during startup 522 */ 523 #define SBSS(sbss_align) \ 524 . = ALIGN(sbss_align); \ 525 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \ 526 *(.sbss) \ 527 *(.scommon) \ 528 } 529 530 /* 531 * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra 532 * sections to the front of bss. 533 */ 534 #ifndef BSS_FIRST_SECTIONS 535 #define BSS_FIRST_SECTIONS 536 #endif 537 538 #define BSS(bss_align) \ 539 . = ALIGN(bss_align); \ 540 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \ 541 BSS_FIRST_SECTIONS \ 542 *(.bss..page_aligned) \ 543 *(.dynbss) \ 544 *(.bss) \ 545 *(COMMON) \ 546 } 547 548 /* 549 * DWARF debug sections. 550 * Symbols in the DWARF debugging sections are relative to 551 * the beginning of the section so we begin them at 0. 552 */ 553 #define DWARF_DEBUG \ 554 /* DWARF 1 */ \ 555 .debug 0 : { *(.debug) } \ 556 .line 0 : { *(.line) } \ 557 /* GNU DWARF 1 extensions */ \ 558 .debug_srcinfo 0 : { *(.debug_srcinfo) } \ 559 .debug_sfnames 0 : { *(.debug_sfnames) } \ 560 /* DWARF 1.1 and DWARF 2 */ \ 561 .debug_aranges 0 : { *(.debug_aranges) } \ 562 .debug_pubnames 0 : { *(.debug_pubnames) } \ 563 /* DWARF 2 */ \ 564 .debug_info 0 : { *(.debug_info \ 565 .gnu.linkonce.wi.*) } \ 566 .debug_abbrev 0 : { *(.debug_abbrev) } \ 567 .debug_line 0 : { *(.debug_line) } \ 568 .debug_frame 0 : { *(.debug_frame) } \ 569 .debug_str 0 : { *(.debug_str) } \ 570 .debug_loc 0 : { *(.debug_loc) } \ 571 .debug_macinfo 0 : { *(.debug_macinfo) } \ 572 /* SGI/MIPS DWARF 2 extensions */ \ 573 .debug_weaknames 0 : { *(.debug_weaknames) } \ 574 .debug_funcnames 0 : { *(.debug_funcnames) } \ 575 .debug_typenames 0 : { *(.debug_typenames) } \ 576 .debug_varnames 0 : { *(.debug_varnames) } \ 577 578 /* Stabs debugging sections. */ 579 #define STABS_DEBUG \ 580 .stab 0 : { *(.stab) } \ 581 .stabstr 0 : { *(.stabstr) } \ 582 .stab.excl 0 : { *(.stab.excl) } \ 583 .stab.exclstr 0 : { *(.stab.exclstr) } \ 584 .stab.index 0 : { *(.stab.index) } \ 585 .stab.indexstr 0 : { *(.stab.indexstr) } \ 586 .comment 0 : { *(.comment) } 587 588 #ifdef CONFIG_GENERIC_BUG 589 #define BUG_TABLE \ 590 . = ALIGN(8); \ 591 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \ 592 VMLINUX_SYMBOL(__start___bug_table) = .; \ 593 *(__bug_table) \ 594 VMLINUX_SYMBOL(__stop___bug_table) = .; \ 595 } 596 #else 597 #define BUG_TABLE 598 #endif 599 600 #ifdef CONFIG_PM_TRACE 601 #define TRACEDATA \ 602 . = ALIGN(4); \ 603 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \ 604 VMLINUX_SYMBOL(__tracedata_start) = .; \ 605 *(.tracedata) \ 606 VMLINUX_SYMBOL(__tracedata_end) = .; \ 607 } 608 #else 609 #define TRACEDATA 610 #endif 611 612 #define NOTES \ 613 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \ 614 VMLINUX_SYMBOL(__start_notes) = .; \ 615 *(.note.*) \ 616 VMLINUX_SYMBOL(__stop_notes) = .; \ 617 } 618 619 #define INIT_SETUP(initsetup_align) \ 620 . = ALIGN(initsetup_align); \ 621 VMLINUX_SYMBOL(__setup_start) = .; \ 622 *(.init.setup) \ 623 VMLINUX_SYMBOL(__setup_end) = .; 624 625 #define INIT_CALLS_LEVEL(level) \ 626 VMLINUX_SYMBOL(__initcall##level##_start) = .; \ 627 *(.initcall##level##.init) \ 628 *(.initcall##level##s.init) \ 629 630 #define INIT_CALLS \ 631 VMLINUX_SYMBOL(__initcall_start) = .; \ 632 *(.initcallearly.init) \ 633 INIT_CALLS_LEVEL(0) \ 634 INIT_CALLS_LEVEL(1) \ 635 INIT_CALLS_LEVEL(2) \ 636 INIT_CALLS_LEVEL(3) \ 637 INIT_CALLS_LEVEL(4) \ 638 INIT_CALLS_LEVEL(5) \ 639 INIT_CALLS_LEVEL(rootfs) \ 640 INIT_CALLS_LEVEL(6) \ 641 INIT_CALLS_LEVEL(7) \ 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