include/asm-generic/vmlinux.lds.h

   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_ops        : AT(ADDR(.rio_ops) - LOAD_OFFSET) {            \
 251                 VMLINUX_SYMBOL(__start_rio_switch_ops) = .;             \
 252                 *(.rio_switch_ops)                                      \
 253                 VMLINUX_SYMBOL(__end_rio_switch_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) = .;