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 #define TRACEPOINT_STR() VMLINUX_SYMBOL(__start___tracepoint_str) = .; \ 126 *(__tracepoint_str) /* Trace_printk fmt' pointer */ \ 127 VMLINUX_SYMBOL(__stop___tracepoint_str) = .; 128 #else 129 #define TRACE_PRINTKS() 130 #define TRACEPOINT_STR() 131 #endif 132 133 #ifdef CONFIG_FTRACE_SYSCALLS 134 #define TRACE_SYSCALLS() . = ALIGN(8); \ 135 VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \ 136 *(__syscalls_metadata) \ 137 VMLINUX_SYMBOL(__stop_syscalls_metadata) = .; 138 #else 139 #define TRACE_SYSCALLS() 140 #endif 141 142 #ifdef CONFIG_CLKSRC_OF 143 #define CLKSRC_OF_TABLES() . = ALIGN(8); \ 144 VMLINUX_SYMBOL(__clksrc_of_table) = .; \ 145 *(__clksrc_of_table) \ 146 *(__clksrc_of_table_end) 147 #else 148 #define CLKSRC_OF_TABLES() 149 #endif 150 151 #ifdef CONFIG_IRQCHIP 152 #define IRQCHIP_OF_MATCH_TABLE() \ 153 . = ALIGN(8); \ 154 VMLINUX_SYMBOL(__irqchip_begin) = .; \ 155 *(__irqchip_of_table) \ 156 *(__irqchip_of_end) 157 #else 158 #define IRQCHIP_OF_MATCH_TABLE() 159 #endif 160 161 #ifdef CONFIG_COMMON_CLK 162 #define CLK_OF_TABLES() . = ALIGN(8); \ 163 VMLINUX_SYMBOL(__clk_of_table) = .; \ 164 *(__clk_of_table) \ 165 *(__clk_of_table_end) 166 #else 167 #define CLK_OF_TABLES() 168 #endif 169 170 #ifdef CONFIG_SMP 171 #define CPU_METHOD_OF_TABLES() . = ALIGN(8); \ 172 VMLINUX_SYMBOL(__cpu_method_of_table_begin) = .; \ 173 *(__cpu_method_of_table) \ 174 VMLINUX_SYMBOL(__cpu_method_of_table_end) = .; 175 #else 176 #define CPU_METHOD_OF_TABLES() 177 #endif 178 179 #define KERNEL_DTB() \ 180 STRUCT_ALIGN(); \ 181 VMLINUX_SYMBOL(__dtb_start) = .; \ 182 *(.dtb.init.rodata) \ 183 VMLINUX_SYMBOL(__dtb_end) = .; 184 185 /* .data section */ 186 #define DATA_DATA \ 187 *(.data) \ 188 *(.ref.data) \ 189 *(.data..shared_aligned) /* percpu related */ \ 190 MEM_KEEP(init.data) \ 191 MEM_KEEP(exit.data) \ 192 *(.data.unlikely) \ 193 STRUCT_ALIGN(); \ 194 *(__tracepoints) \ 195 /* implement dynamic printk debug */ \ 196 . = ALIGN(8); \ 197 VMLINUX_SYMBOL(__start___jump_table) = .; \ 198 *(__jump_table) \ 199 VMLINUX_SYMBOL(__stop___jump_table) = .; \ 200 . = ALIGN(8); \ 201 VMLINUX_SYMBOL(__start___verbose) = .; \ 202 *(__verbose) \ 203 VMLINUX_SYMBOL(__stop___verbose) = .; \ 204 LIKELY_PROFILE() \ 205 BRANCH_PROFILE() \ 206 TRACE_PRINTKS() \ 207 TRACEPOINT_STR() 208 209 /* 210 * Data section helpers 211 */ 212 #define NOSAVE_DATA \ 213 . = ALIGN(PAGE_SIZE); \ 214 VMLINUX_SYMBOL(__nosave_begin) = .; \ 215 *(.data..nosave) \ 216 . = ALIGN(PAGE_SIZE); \ 217 VMLINUX_SYMBOL(__nosave_end) = .; 218 219 #define PAGE_ALIGNED_DATA(page_align) \ 220 . = ALIGN(page_align); \ 221 *(.data..page_aligned) 222 223 #define READ_MOSTLY_DATA(align) \ 224 . = ALIGN(align); \ 225 *(.data..read_mostly) \ 226 . = ALIGN(align); 227 228 #define CACHELINE_ALIGNED_DATA(align) \ 229 . = ALIGN(align); \ 230 *(.data..cacheline_aligned) 231 232 #define INIT_TASK_DATA(align) \ 233 . = ALIGN(align); \ 234 *(.data..init_task) 235 236 /* 237 * Read only Data 238 */ 239 #define RO_DATA_SECTION(align) \ 240 . = ALIGN((align)); \ 241 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \ 242 VMLINUX_SYMBOL(__start_rodata) = .; \ 243 *(.rodata) *(.rodata.*) \ 244 *(__vermagic) /* Kernel version magic */ \ 245 . = ALIGN(8); \ 246 VMLINUX_SYMBOL(__start___tracepoints_ptrs) = .; \ 247 *(__tracepoints_ptrs) /* Tracepoints: pointer array */\ 248 VMLINUX_SYMBOL(__stop___tracepoints_ptrs) = .; \ 249 *(__tracepoints_strings)/* Tracepoints: strings */ \ 250 } \ 251 \ 252 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \ 253 *(.rodata1) \ 254 } \ 255 \ 256 BUG_TABLE \ 257 \ 258 /* PCI quirks */ \ 259 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \ 260 VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \ 261 *(.pci_fixup_early) \ 262 VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \ 263 VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \ 264 *(.pci_fixup_header) \ 265 VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \ 266 VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \ 267 *(.pci_fixup_final) \ 268 VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \ 269 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \ 270 *(.pci_fixup_enable) \ 271 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \ 272 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \ 273 *(.pci_fixup_resume) \ 274 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \ 275 VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \ 276 *(.pci_fixup_resume_early) \ 277 VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \ 278 VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \ 279 *(.pci_fixup_suspend) \ 280 VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \ 281 } \ 282 \ 283 /* Built-in firmware blobs */ \ 284 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \ 285 VMLINUX_SYMBOL(__start_builtin_fw) = .; \ 286 *(.builtin_fw) \ 287 VMLINUX_SYMBOL(__end_builtin_fw) = .; \ 288 } \ 289 \ 290 TRACEDATA \ 291 \ 292 /* Kernel symbol table: Normal symbols */ \ 293 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \ 294 VMLINUX_SYMBOL(__start___ksymtab) = .; \ 295 *(SORT(___ksymtab+*)) \ 296 VMLINUX_SYMBOL(__stop___ksymtab) = .; \ 297 } \ 298 \ 299 /* Kernel symbol table: GPL-only symbols */ \ 300 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \ 301 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \ 302 *(SORT(___ksymtab_gpl+*)) \ 303 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \ 304 } \ 305 \ 306 /* Kernel symbol table: Normal unused symbols */ \ 307 __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \ 308 VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \ 309 *(SORT(___ksymtab_unused+*)) \ 310 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \ 311 } \ 312 \ 313 /* Kernel symbol table: GPL-only unused symbols */ \ 314 __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \ 315 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \ 316 *(SORT(___ksymtab_unused_gpl+*)) \ 317 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \ 318 } \ 319 \ 320 /* Kernel symbol table: GPL-future-only symbols */ \ 321 __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \ 322 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \ 323 *(SORT(___ksymtab_gpl_future+*)) \ 324 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \ 325 } \ 326 \ 327 /* Kernel symbol table: Normal symbols */ \ 328 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \ 329 VMLINUX_SYMBOL(__start___kcrctab) = .; \ 330 *(SORT(___kcrctab+*)) \ 331 VMLINUX_SYMBOL(__stop___kcrctab) = .; \ 332 } \ 333 \ 334 /* Kernel symbol table: GPL-only symbols */ \ 335 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \ 336 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \ 337 *(SORT(___kcrctab_gpl+*)) \ 338 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \ 339 } \ 340 \ 341 /* Kernel symbol table: Normal unused symbols */ \ 342 __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \ 343 VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \ 344 *(SORT(___kcrctab_unused+*)) \ 345 VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \ 346 } \ 347 \ 348 /* Kernel symbol table: GPL-only unused symbols */ \ 349 __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \ 350 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \ 351 *(SORT(___kcrctab_unused_gpl+*)) \ 352 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \ 353 } \ 354 \ 355 /* Kernel symbol table: GPL-future-only symbols */ \ 356 __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \ 357 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \ 358 *(SORT(___kcrctab_gpl_future+*)) \ 359 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \ 360 } \ 361 \ 362 /* Kernel symbol table: strings */ \ 363 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \ 364 *(__ksymtab_strings) \ 365 } \ 366 \ 367 /* __*init sections */ \ 368 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \ 369 *(.ref.rodata) \ 370 MEM_KEEP(init.rodata) \ 371 MEM_KEEP(exit.rodata) \ 372 } \ 373 \ 374 /* Built-in module parameters. */ \ 375 __param : AT(ADDR(__param) - LOAD_OFFSET) { \ 376 VMLINUX_SYMBOL(__start___param) = .; \ 377 *(__param) \ 378 VMLINUX_SYMBOL(__stop___param) = .; \ 379 } \ 380 \ 381 /* Built-in module versions. */ \ 382 __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \ 383 VMLINUX_SYMBOL(__start___modver) = .; \ 384 *(__modver) \ 385 VMLINUX_SYMBOL(__stop___modver) = .; \ 386 . = ALIGN((align)); \ 387 VMLINUX_SYMBOL(__end_rodata) = .; \ 388 } \ 389 . = ALIGN((align)); 390 391 /* RODATA & RO_DATA provided for backward compatibility. 392 * All archs are supposed to use RO_DATA() */ 393 #define RODATA RO_DATA_SECTION(4096) 394 #define RO_DATA(align) RO_DATA_SECTION(align) 395 396 #define SECURITY_INIT \ 397 .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \ 398 VMLINUX_SYMBOL(__security_initcall_start) = .; \ 399 *(.security_initcall.init) \ 400 VMLINUX_SYMBOL(__security_initcall_end) = .; \ 401 } 402 403 /* .text section. Map to function alignment to avoid address changes 404 * during second ld run in second ld pass when generating System.map */ 405 #define TEXT_TEXT \ 406 ALIGN_FUNCTION(); \ 407 *(.text.hot) \ 408 *(.text) \ 409 *(.ref.text) \ 410 MEM_KEEP(init.text) \ 411 MEM_KEEP(exit.text) \ 412 *(.text.unlikely) 413 414 415 /* sched.text is aling to function alignment to secure we have same 416 * address even at second ld pass when generating System.map */ 417 #define SCHED_TEXT \ 418 ALIGN_FUNCTION(); \ 419 VMLINUX_SYMBOL(__sched_text_start) = .; \ 420 *(.sched.text) \ 421 VMLINUX_SYMBOL(__sched_text_end) = .; 422 423 /* spinlock.text is aling to function alignment to secure we have same 424 * address even at second ld pass when generating System.map */ 425 #define LOCK_TEXT \ 426 ALIGN_FUNCTION(); \ 427 VMLINUX_SYMBOL(__lock_text_start) = .; \ 428 *(.spinlock.text) \ 429 VMLINUX_SYMBOL(__lock_text_end) = .; 430 431 #define KPROBES_TEXT \ 432 ALIGN_FUNCTION(); \ 433 VMLINUX_SYMBOL(__kprobes_text_start) = .; \ 434 *(.kprobes.text) \ 435 VMLINUX_SYMBOL(__kprobes_text_end) = .; 436 437 #define ENTRY_TEXT \ 438 ALIGN_FUNCTION(); \ 439 VMLINUX_SYMBOL(__entry_text_start) = .; \ 440 *(.entry.text) \ 441 VMLINUX_SYMBOL(__entry_text_end) = .; 442 443 #ifdef CONFIG_FUNCTION_GRAPH_TRACER 444 #define IRQENTRY_TEXT \ 445 ALIGN_FUNCTION(); \ 446 VMLINUX_SYMBOL(__irqentry_text_start) = .; \ 447 *(.irqentry.text) \ 448 VMLINUX_SYMBOL(__irqentry_text_end) = .; 449 #else 450 #define IRQENTRY_TEXT 451 #endif 452 453 /* Section used for early init (in .S files) */ 454 #define HEAD_TEXT *(.head.text) 455 456 #define HEAD_TEXT_SECTION \ 457 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \ 458 HEAD_TEXT \ 459 } 460 461 /* 462 * Exception table 463 */ 464 #define EXCEPTION_TABLE(align) \ 465 . = ALIGN(align); \ 466 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \ 467 VMLINUX_SYMBOL(__start___ex_table) = .; \ 468 *(__ex_table) \ 469 VMLINUX_SYMBOL(__stop___ex_table) = .; \ 470 } 471 472 /* 473 * Init task 474 */ 475 #define INIT_TASK_DATA_SECTION(align) \ 476 . = ALIGN(align); \ 477 .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \ 478 INIT_TASK_DATA(align) \ 479 } 480 481 #ifdef CONFIG_CONSTRUCTORS 482 #define KERNEL_CTORS() . = ALIGN(8); \ 483 VMLINUX_SYMBOL(__ctors_start) = .; \ 484 *(.ctors) \ 485 *(.init_array) \ 486 VMLINUX_SYMBOL(__ctors_end) = .; 487 #else 488 #define KERNEL_CTORS() 489 #endif 490 491 /* init and exit section handling */ 492 #define INIT_DATA \ 493 *(.init.data) \ 494 MEM_DISCARD(init.data) \ 495 KERNEL_CTORS() \ 496 MCOUNT_REC() \ 497 *(.init.rodata) \ 498 FTRACE_EVENTS() \ 499 TRACE_SYSCALLS() \ 500 MEM_DISCARD(init.rodata) \ 501 CLK_OF_TABLES() \ 502 CLKSRC_OF_TABLES() \ 503 CPU_METHOD_OF_TABLES() \ 504 KERNEL_DTB() \ 505 IRQCHIP_OF_MATCH_TABLE() 506 507 #define INIT_TEXT \ 508 *(.init.text) \ 509 MEM_DISCARD(init.text) 510 511 #define EXIT_DATA \ 512 *(.exit.data) \ 513 MEM_DISCARD(exit.data) \ 514 MEM_DISCARD(exit.rodata) 515 516 #define EXIT_TEXT \ 517 *(.exit.text) \ 518 MEM_DISCARD(exit.text) 519 520 #define EXIT_CALL \ 521 *(.exitcall.exit) 522 523 /* 524 * bss (Block Started by Symbol) - uninitialized data 525 * zeroed during startup 526 */ 527 #define SBSS(sbss_align) \ 528 . = ALIGN(sbss_align); \ 529 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \ 530 *(.sbss) \ 531 *(.scommon) \ 532 } 533 534 /* 535 * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra 536 * sections to the front of bss. 537 */ 538 #ifndef BSS_FIRST_SECTIONS 539 #define BSS_FIRST_SECTIONS 540 #endif 541 542 #define BSS(bss_align) \ 543 . = ALIGN(bss_align); \ 544 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \ 545 BSS_FIRST_SECTIONS \ 546 *(.bss..page_aligned) \ 547 *(.dynbss) \ 548 *(.bss) \ 549 *(COMMON) \ 550 } 551 552 /* 553 * DWARF debug sections. 554 * Symbols in the DWARF debugging sections are relative to 555 * the beginning of the section so we begin them at 0. 556 */ 557 #define DWARF_DEBUG \ 558 /* DWARF 1 */ \ 559 .debug 0 : { *(.debug) } \ 560 .line 0 : { *(.line) } \ 561 /* GNU DWARF 1 extensions */ \ 562 .debug_srcinfo 0 : { *(.debug_srcinfo) } \ 563 .debug_sfnames 0 : { *(.debug_sfnames) } \ 564 /* DWARF 1.1 and DWARF 2 */ \ 565 .debug_aranges 0 : { *(.debug_aranges) } \ 566 .debug_pubnames 0 : { *(.debug_pubnames) } \ 567 /* DWARF 2 */ \ 568 .debug_info 0 : { *(.debug_info \ 569 .gnu.linkonce.wi.*) } \ 570 .debug_abbrev 0 : { *(.debug_abbrev) } \ 571 .debug_line 0 : { *(.debug_line) } \ 572 .debug_frame 0 : { *(.debug_frame) } \ 573 .debug_str 0 : { *(.debug_str) } \ 574 .debug_loc 0 : { *(.debug_loc) } \ 575 .debug_macinfo 0 : { *(.debug_macinfo) } \ 576 /* SGI/MIPS DWARF 2 extensions */ \ 577 .debug_weaknames 0 : { *(.debug_weaknames) } \ 578 .debug_funcnames 0 : { *(.debug_funcnames) } \ 579 .debug_typenames 0 : { *(.debug_typenames) } \ 580 .debug_varnames 0 : { *(.debug_varnames) } \ 581 582 /* Stabs debugging sections. */ 583 #define STABS_DEBUG \ 584 .stab 0 : { *(.stab) } \ 585 .stabstr 0 : { *(.stabstr) } \ 586 .stab.excl 0 : { *(.stab.excl) } \ 587 .stab.exclstr 0 : { *(.stab.exclstr) } \ 588 .stab.index 0 : { *(.stab.index) } \ 589 .stab.indexstr 0 : { *(.stab.indexstr) } \ 590 .comment 0 : { *(.comment) } 591 592 #ifdef CONFIG_GENERIC_BUG 593 #define BUG_TABLE \ 594 . = ALIGN(8); \ 595 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \ 596 VMLINUX_SYMBOL(__start___bug_table) = .; \ 597 *(__bug_table) \ 598 VMLINUX_SYMBOL(__stop___bug_table) = .; \ 599 } 600 #else 601 #define BUG_TABLE 602 #endif 603 604 #ifdef CONFIG_PM_TRACE 605 #define TRACEDATA \ 606 . = ALIGN(4); \ 607 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \ 608 VMLINUX_SYMBOL(__tracedata_start) = .; \ 609 *(.tracedata) \ 610 VMLINUX_SYMBOL(__tracedata_end) = .; \ 611 } 612 #else 613 #define TRACEDATA 614 #endif 615 616 #define NOTES \ 617 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \ 618 VMLINUX_SYMBOL(__start_notes) = .; \ 619 *(.note.*) \ 620 VMLINUX_SYMBOL(__stop_notes) = .; \ 621 } 622 623 #define INIT_SETUP(initsetup_align) \ 624 . = ALIGN(initsetup_align); \ 625 VMLINUX_SYMBOL(__setup_start) = .; \ 626 *(.init.setup) \ 627 VMLINUX_SYMBOL(__setup_end) = .; 628 629 #define INIT_CALLS_LEVEL(level) \ 630 VMLINUX_SYMBOL(__initcall##level##_start) = .; \ 631 *(.initcall##level##.init) \ 632 *(.initcall##level##s.init) \ 633 634 #define INIT_CALLS \ 635 VMLINUX_SYMBOL(__initcall_start) = .; \ 636 *(.initcallearly.init) \ 637 INIT_CALLS_LEVEL(0) \ 638 INIT_CALLS_LEVEL(1) \ 639 INIT_CALLS_LEVEL(2) \ 640 INIT_CALLS_LEVEL(3) \ 641 INIT_CALLS_LEVEL(4) \ 642 INIT_CALLS_LEVEL(5) \ 643 INIT_CALLS_LEVEL(rootfs) \ 644 INIT_CALLS_LEVEL(6) \ 645 INIT_CALLS_LEVEL(7) \ 646 VMLINUX_SYMBOL(__initcall_end) = .; 647 648 #define CON_INITCALL \ 649 VMLINUX_SYMBOL(__con_initcall_start) = .; \ 650 *(.con_initcall.init) \ 651 VMLINUX_SYMBOL(__con_initcall_end) = .; 652 653 #define SECURITY_INITCALL \ 654 VMLINUX_SYMBOL(__security_initcall_start) = .; \ 655 *(.security_initcall.init) \ 656 VMLINUX_SYMBOL(__security_initcall_end) = .; 657 658 #ifdef CONFIG_BLK_DEV_INITRD 659 #define INIT_RAM_FS \ 660 . = ALIGN(4); \ 661 VMLINUX_SYMBOL(__initramfs_start) = .; \ 662 *(.init.ramfs) \ 663 . = ALIGN(8); \ 664 *(.init.ramfs.info) 665 #else 666 #define INIT_RAM_FS 667 #endif 668 669 /* 670 * Default discarded sections. 671 * 672 * Some archs want to discard exit text/data at runtime rather than 673 * link time due to cross-section references such as alt instructions, 674 * bug table, eh_frame, etc. DISCARDS must be the last of output 675 * section definitions so that such archs put those in earlier section 676 * definitions. 677 */ 678 #define DISCARDS \ 679 /DISCARD/ : { \ 680 EXIT_TEXT \ 681 EXIT_DATA \ 682 EXIT_CALL \ 683 *(.discard) \ 684 *(.discard.*) \ 685 } 686 687 /** 688 * PERCPU_INPUT - the percpu input sections 689 * @cacheline: cacheline size 690 * 691 * The core percpu section names and core symbols which do not rely 692 * directly upon load addresses. 693 * 694 * @cacheline is used to align subsections to avoid false cacheline 695 * sharing between subsections for different purposes. 696 */ 697 #define PERCPU_INPUT(cacheline) \ 698 VMLINUX_SYMBOL(__per_cpu_start) = .; \ 699 *(.data..percpu..first) \ 700 . = ALIGN(PAGE_SIZE); \ 701 *(.data..percpu..page_aligned) \ 702 . = ALIGN(cacheline); \ 703 *(.data..percpu..readmostly) \ 704 . = ALIGN(cacheline); \ 705 *(.data..percpu) \ 706 *(.data..percpu..shared_aligned) \ 707 VMLINUX_SYMBOL(__per_cpu_end) = .; 708 709 /** 710 * PERCPU_VADDR - define output section for percpu area 711 * @cacheline: cacheline size 712 * @vaddr: explicit base address (optional) 713 * @phdr: destination PHDR (optional) 714 * 715 * Macro which expands to output section for percpu area. 716 * 717 * @cacheline is used to align subsections to avoid false cacheline 718 * sharing between subsections for different purposes. 719 * 720 * If @vaddr is not blank, it specifies explicit base address and all 721 * percpu symbols will be offset from the given address. If blank, 722 * @vaddr always equals @laddr + LOAD_OFFSET. 723 * 724 * @phdr defines the output PHDR to use if not blank. Be warned that 725 * output PHDR is sticky. If @phdr is specified, the next output 726 * section in the linker script will go there too. @phdr should have 727 * a leading colon. 728 * 729 * Note that this macros defines __per_cpu_load as an absolute symbol. 730 * If there is no need to put the percpu section at a predetermined 731 * address, use PERCPU_SECTION. 732 */ 733 #define PERCPU_VADDR(cacheline, vaddr, phdr) \ 734 VMLINUX_SYMBOL(__per_cpu_load) = .; \ 735 .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \ 736 - LOAD_OFFSET) { \ 737 PERCPU_INPUT(cacheline) \ 738 } phdr \ 739 . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu); 740 741 /** 742 * PERCPU_SECTION - define output section for percpu area, simple version 743 * @cacheline: cacheline size 744 * 745 * Align to PAGE_SIZE and outputs output section for percpu area. This 746 * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and 747 * __per_cpu_start will be identical. 748 * 749 * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,) 750 * except that __per_cpu_load is defined as a relative symbol against 751 * .data..percpu which is required for relocatable x86_32 configuration. 752 */ 753 #define PERCPU_SECTION(cacheline) \ 754 . = ALIGN(PAGE_SIZE); \ 755 .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \ 756 VMLINUX_SYMBOL(__per_cpu_load) = .; \ 757 PERCPU_INPUT(cacheline) \ 758 } 759 760 761 /* 762 * Definition of the high level *_SECTION macros 763 * They will fit only a subset of the architectures 764 */ 765 766 767 /* 768 * Writeable data. 769 * All sections are combined in a single .data section. 770 * The sections following CONSTRUCTORS are arranged so their 771 * typical alignment matches. 772 * A cacheline is typical/always less than a PAGE_SIZE so 773 * the sections that has this restriction (or similar) 774 * is located before the ones requiring PAGE_SIZE alignment. 775 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which 776 * matches the requirement of PAGE_ALIGNED_DATA. 777 * 778 * use 0 as page_align if page_aligned data is not used */ 779 #define RW_DATA_SECTION(cacheline, pagealigned, inittask) \ 780 . = ALIGN(PAGE_SIZE); \ 781 .data : AT(ADDR(.data) - LOAD_OFFSET) { \ 782 INIT_TASK_DATA(inittask) \ 783 NOSAVE_DATA \ 784 PAGE_ALIGNED_DATA(pagealigned) \ 785 CACHELINE_ALIGNED_DATA(cacheline) \ 786 READ_MOSTLY_DATA(cacheline) \ 787 DATA_DATA \ 788 CONSTRUCTORS \ 789 } 790 791 #define INIT_TEXT_SECTION(inittext_align) \ 792 . = ALIGN(inittext_align); \ 793 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \ 794 VMLINUX_SYMBOL(_sinittext) = .; \ 795 INIT_TEXT \ 796 VMLINUX_SYMBOL(_einittext) = .; \ 797 } 798 799 #define INIT_DATA_SECTION(initsetup_align) \ 800 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \ 801 INIT_DATA \ 802 INIT_SETUP(initsetup_align) \ 803 INIT_CALLS \ 804 CON_INITCALL \ 805 SECURITY_INITCALL \ 806 INIT_RAM_FS \ 807 } 808 809 #define BSS_SECTION(sbss_align, bss_align, stop_align) \ 810 . = ALIGN(sbss_align); \ 811 VMLINUX_SYMBOL(__bss_start) = .; \ 812 SBSS(sbss_align) \ 813 BSS(bss_align) \ 814 . = ALIGN(stop_align); \ 815 VMLINUX_SYMBOL(__bss_stop) = .; 816