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 /*
  67  * Align to a 32 byte boundary equal to the
  68  * alignment gcc 4.5 uses for a struct
  69  */
  70 #define STRUCT_ALIGN() . = ALIGN(32)
  71
  72 /* The actual configuration determine if the init/exit sections
  73  * are handled as text/data or they can be discarded (which
  74  * often happens at runtime)
  75  */
  76 #ifdef CONFIG_HOTPLUG
  77 #define DEV_KEEP(sec)    *(.dev##sec)
  78 #define DEV_DISCARD(sec)
  79 #else
  80 #define DEV_KEEP(sec)
  81 #define DEV_DISCARD(sec) *(.dev##sec)
  82 #endif
  83
  84 #ifdef CONFIG_HOTPLUG_CPU
  85 #define CPU_KEEP(sec)    *(.cpu##sec)
  86 #define CPU_DISCARD(sec)
  87 #else
  88 #define CPU_KEEP(sec)
  89 #define CPU_DISCARD(sec) *(.cpu##sec)
  90 #endif
  91
  92 #if defined(CONFIG_MEMORY_HOTPLUG)
  93 #define MEM_KEEP(sec)    *(.mem##sec)
  94 #define MEM_DISCARD(sec)
  95 #else
  96 #define MEM_KEEP(sec)
  97 #define MEM_DISCARD(sec) *(.mem##sec)
  98 #endif
  99
 100 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
 101 #define MCOUNT_REC()    . = ALIGN(8);                           \
 102                         VMLINUX_SYMBOL(__start_mcount_loc) = .; \
 103                         *(__mcount_loc)                         \
 104                         VMLINUX_SYMBOL(__stop_mcount_loc) = .;
 105 #else
 106 #define MCOUNT_REC()
 107 #endif
 108
 109 #ifdef CONFIG_TRACE_BRANCH_PROFILING
 110 #define LIKELY_PROFILE()        VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \
 111                                 *(_ftrace_annotated_branch)                           \
 112                                 VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .;
 113 #else
 114 #define LIKELY_PROFILE()
 115 #endif
 116
 117 #ifdef CONFIG_PROFILE_ALL_BRANCHES
 118 #define BRANCH_PROFILE()        VMLINUX_SYMBOL(__start_branch_profile) = .;   \
 119                                 *(_ftrace_branch)                             \
 120                                 VMLINUX_SYMBOL(__stop_branch_profile) = .;
 121 #else
 122 #define BRANCH_PROFILE()
 123 #endif
 124
 125 #ifdef CONFIG_EVENT_TRACING
 126 #define FTRACE_EVENTS() VMLINUX_SYMBOL(__start_ftrace_events) = .;      \
 127                         *(_ftrace_events)                               \
 128                         VMLINUX_SYMBOL(__stop_ftrace_events) = .;
 129 #else
 130 #define FTRACE_EVENTS()
 131 #endif
 132
 133 #ifdef CONFIG_TRACING
 134 #define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .;      \
 135                          *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \
 136                          VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .;
 137 #else
 138 #define TRACE_PRINTKS()
 139 #endif
 140
 141 #ifdef CONFIG_FTRACE_SYSCALLS
 142 #define TRACE_SYSCALLS() VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \
 143                          *(__syscalls_metadata)                         \
 144                          VMLINUX_SYMBOL(__stop_syscalls_metadata) = .;
 145 #else
 146 #define TRACE_SYSCALLS()
 147 #endif
 148
 149 /* .data section */
 150 #define DATA_DATA                                                       \
 151         *(.data)                                                        \
 152         *(.ref.data)                                                    \
 153         DEV_KEEP(init.data)                                             \
 154         DEV_KEEP(exit.data)                                             \
 155         CPU_KEEP(init.data)                                             \
 156         CPU_KEEP(exit.data)                                             \
 157         MEM_KEEP(init.data)                                             \
 158         MEM_KEEP(exit.data)                                             \
 159         . = ALIGN(32);                                                  \
 160         VMLINUX_SYMBOL(__start___tracepoints) = .;                      \
 161         *(__tracepoints)                                                \
 162         VMLINUX_SYMBOL(__stop___tracepoints) = .;                       \
 163         /* implement dynamic printk debug */                            \
 164         . = ALIGN(8);                                                   \
 165         VMLINUX_SYMBOL(__start___verbose) = .;                          \
 166         *(__verbose)                                                    \
 167         VMLINUX_SYMBOL(__stop___verbose) = .;                           \
 168         LIKELY_PROFILE()                                                \
 169         BRANCH_PROFILE()                                                \
 170         TRACE_PRINTKS()                                                 \
 171                                                                         \
 172         STRUCT_ALIGN();                                                 \
 173         FTRACE_EVENTS()                                                 \
 174                                                                         \
 175         STRUCT_ALIGN();                                                 \
 176         TRACE_SYSCALLS()
 177
 178 /*
 179  * Data section helpers
 180  */
 181 #define NOSAVE_DATA                                                     \
 182         . = ALIGN(PAGE_SIZE);                                           \
 183         VMLINUX_SYMBOL(__nosave_begin) = .;                             \
 184         *(.data..nosave)                                                \
 185         . = ALIGN(PAGE_SIZE);                                           \
 186         VMLINUX_SYMBOL(__nosave_end) = .;
 187
 188 #define PAGE_ALIGNED_DATA(page_align)                                   \
 189         . = ALIGN(page_align);                                          \
 190         *(.data..page_aligned)
 191
 192 #define READ_MOSTLY_DATA(align)                                         \
 193         . = ALIGN(align);                                               \
 194         *(.data..read_mostly)
 195
 196 #define CACHELINE_ALIGNED_DATA(align)                                   \
 197         . = ALIGN(align);                                               \
 198         *(.data..cacheline_aligned)
 199
 200 #define INIT_TASK_DATA(align)                                           \
 201         . = ALIGN(align);                                               \
 202         *(.data..init_task)
 203
 204 /*
 205  * Read only Data
 206  */
 207 #define RO_DATA_SECTION(align)                                          \
 208         . = ALIGN((align));                                             \
 209         .rodata           : AT(ADDR(.rodata) - LOAD_OFFSET) {           \
 210                 VMLINUX_SYMBOL(__start_rodata) = .;                     \
 211                 *(.rodata) *(.rodata.*)                                 \
 212                 *(__vermagic)           /* Kernel version magic */      \
 213                 *(__markers_strings)    /* Markers: strings */          \
 214                 *(__tracepoints_strings)/* Tracepoints: strings */      \
 215         }                                                               \
 216                                                                         \
 217         .rodata1          : AT(ADDR(.rodata1) - LOAD_OFFSET) {          \
 218                 *(.rodata1)                                             \
 219         }                                                               \
 220                                                                         \
 221         BUG_TABLE                                                       \
 222                                                                         \
 223         /* PCI quirks */                                                \
 224         .pci_fixup        : AT(ADDR(.pci_fixup) - LOAD_OFFSET) {        \
 225                 VMLINUX_SYMBOL(__start_pci_fixups_early) = .;           \
 226                 *(.pci_fixup_early)                                     \
 227                 VMLINUX_SYMBOL(__end_pci_fixups_early) = .;             \
 228                 VMLINUX_SYMBOL(__start_pci_fixups_header) = .;          \
 229                 *(.pci_fixup_header)                                    \
 230                 VMLINUX_SYMBOL(__end_pci_fixups_header) = .;            \
 231                 VMLINUX_SYMBOL(__start_pci_fixups_final) = .;           \
 232                 *(.pci_fixup_final)                                     \
 233                 VMLINUX_SYMBOL(__end_pci_fixups_final) = .;             \
 234                 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .;          \
 235                 *(.pci_fixup_enable)                                    \
 236                 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .;            \
 237                 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .;          \
 238                 *(.pci_fixup_resume)                                    \
 239                 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .;            \
 240                 VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .;    \
 241                 *(.pci_fixup_resume_early)                              \
 242                 VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .;      \
 243                 VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .;         \
 244                 *(.pci_fixup_suspend)                                   \
 245                 VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .;           \
 246         }                                                               \
 247                                                                         \
 248         /* Built-in firmware blobs */                                   \
 249         .builtin_fw        : AT(ADDR(.builtin_fw) - LOAD_OFFSET) {      \
 250                 VMLINUX_SYMBOL(__start_builtin_fw) = .;                 \
 251                 *(.builtin_fw)                                          \
 252                 VMLINUX_SYMBOL(__end_builtin_fw) = .;                   \
 253         }                                                               \
 254                                                                         \
 255         /* RapidIO route ops */                                         \
 256         .rio_ops        : AT(ADDR(.rio_ops) - LOAD_OFFSET) {            \
 257                 VMLINUX_SYMBOL(__start_rio_switch_ops) = .;             \
 258                 *(.rio_switch_ops)                                      \
 259                 VMLINUX_SYMBOL(__end_rio_switch_ops) = .;               \
 260         }                                                               \
 261                                                                         \
 262         TRACEDATA                                                       \
 263                                                                         \
 264         /* Kernel symbol table: Normal symbols */                       \
 265         __ksymtab         : AT(ADDR(__ksymtab) - LOAD_OFFSET) {         \
 266                 VMLINUX_SYMBOL(__start___ksymtab) = .;                  \
 267                 *(__ksymtab)                                            \
 268                 VMLINUX_SYMBOL(__stop___ksymtab) = .;                   \
 269         }                                                               \
 270                                                                         \
 271         /* Kernel symbol table: GPL-only symbols */                     \
 272         __ksymtab_gpl     : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) {     \
 273                 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .;              \
 274                 *(__ksymtab_gpl)                                        \
 275                 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .;               \
 276         }                                                               \
 277                                                                         \
 278         /* Kernel symbol table: Normal unused symbols */                \
 279         __ksymtab_unused  : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) {  \
 280                 VMLINUX_SYMBOL(__start___ksymtab_unused) = .;           \
 281                 *(__ksymtab_unused)                                     \
 282                 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .;            \
 283         }                                                               \
 284                                                                         \
 285         /* Kernel symbol table: GPL-only unused symbols */              \
 286         __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
 287                 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .;       \
 288                 *(__ksymtab_unused_gpl)                                 \
 289                 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .;        \
 290         }                                                               \
 291                                                                         \
 292         /* Kernel symbol table: GPL-future-only symbols */              \
 293         __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
 294                 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .;       \
 295                 *(__ksymtab_gpl_future)                                 \
 296                 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .;        \
 297         }                                                               \
 298                                                                         \
 299         /* Kernel symbol table: Normal symbols */                       \
 300         __kcrctab         : AT(ADDR(__kcrctab) - LOAD_OFFSET) {         \
 301                 VMLINUX_SYMBOL(__start___kcrctab) = .;                  \
 302                 *(__kcrctab)                                            \
 303                 VMLINUX_SYMBOL(__stop___kcrctab) = .;                   \
 304         }                                                               \
 305                                                                         \
 306         /* Kernel symbol table: GPL-only symbols */                     \
 307         __kcrctab_gpl     : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) {     \
 308                 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .;              \
 309                 *(__kcrctab_gpl)                                        \
 310                 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .;               \
 311         }                                                               \
 312                                                                         \
 313         /* Kernel symbol table: Normal unused symbols */                \
 314         __kcrctab_unused  : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) {  \
 315                 VMLINUX_SYMBOL(__start___kcrctab_unused) = .;           \
 316                 *(__kcrctab_unused)                                     \
 317                 VMLINUX_SYMBOL(__stop___kcrctab_unused) = .;            \
 318         }                                                               \
 319                                                                         \
 320         /* Kernel symbol table: GPL-only unused symbols */              \
 321         __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
 322                 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .;       \
 323                 *(__kcrctab_unused_gpl)                                 \
 324                 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .;        \
 325         }                                                               \
 326                                                                         \
 327         /* Kernel symbol table: GPL-future-only symbols */              \
 328         __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
 329                 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .;       \
 330                 *(__kcrctab_gpl_future)                                 \
 331                 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .;        \
 332         }                                                               \
 333                                                                         \
 334         /* Kernel symbol table: strings */                              \
 335         __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
 336                 *(__ksymtab_strings)                                    \
 337         }                                                               \
 338                                                                         \
 339         /* __*init sections */                                          \
 340         __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) {         \
 341                 *(.ref.rodata)                                          \
 342                 DEV_KEEP(init.rodata)                                   \
 343                 DEV_KEEP(exit.rodata)                                   \
 344                 CPU_KEEP(init.rodata)                                   \
 345                 CPU_KEEP(exit.rodata)                                   \
 346                 MEM_KEEP(init.rodata)                                   \
 347                 MEM_KEEP(exit.rodata)                                   \
 348         }                                                               \
 349                                                                         \
 350         /* Built-in module parameters. */                               \
 351         __param : AT(ADDR(__param) - LOAD_OFFSET) {                     \
 352                 VMLINUX_SYMBOL(__start___param) = .;                    \
 353                 *(__param)                                              \
 354                 VMLINUX_SYMBOL(__stop___param) = .;                     \
 355                 . = ALIGN((align));                                     \
 356                 VMLINUX_SYMBOL(__end_rodata) = .;                       \
 357         }                                                               \
 358         . = ALIGN((align));
 359
 360 /* RODATA & RO_DATA provided for backward compatibility.
 361  * All archs are supposed to use RO_DATA() */
 362 #define RODATA          RO_DATA_SECTION(4096)
 363 #define RO_DATA(align)  RO_DATA_SECTION(align)
 364
 365 #define SECURITY_INIT                                                   \
 366         .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
 367                 VMLINUX_SYMBOL(__security_initcall_start) = .;          \
 368                 *(.security_initcall.init)                              \
 369                 VMLINUX_SYMBOL(__security_initcall_end) = .;            \
 370         }
 371
 372 /* .text section. Map to function alignment to avoid address changes
 373  * during second ld run in second ld pass when generating System.map */
 374 #define TEXT_TEXT                                                       \
 375                 ALIGN_FUNCTION();                                       \
 376                 *(.text.hot)                                            \
 377                 *(.text)                                                \
 378                 *(.ref.text)                                            \
 379         DEV_KEEP(init.text)                                             \
 380         DEV_KEEP(exit.text)                                             \
 381         CPU_KEEP(init.text)                                             \
 382         CPU_KEEP(exit.text)                                             \
 383         MEM_KEEP(init.text)                                             \
 384         MEM_KEEP(exit.text)                                             \
 385                 *(.text.unlikely)
 386
 387
 388 /* sched.text is aling to function alignment to secure we have same
 389  * address even at second ld pass when generating System.map */
 390 #define SCHED_TEXT                                                      \
 391                 ALIGN_FUNCTION();                                       \
 392                 VMLINUX_SYMBOL(__sched_text_start) = .;                 \
 393                 *(.sched.text)                                          \
 394                 VMLINUX_SYMBOL(__sched_text_end) = .;
 395
 396 /* spinlock.text is aling to function alignment to secure we have same
 397  * address even at second ld pass when generating System.map */
 398 #define LOCK_TEXT                                                       \
 399                 ALIGN_FUNCTION();                                       \
 400                 VMLINUX_SYMBOL(__lock_text_start) = .;                  \
 401                 *(.spinlock.text)                                       \
 402                 VMLINUX_SYMBOL(__lock_text_end) = .;
 403
 404 #define KPROBES_TEXT                                                    \
 405                 ALIGN_FUNCTION();                                       \
 406                 VMLINUX_SYMBOL(__kprobes_text_start) = .;               \
 407                 *(.kprobes.text)                                        \
 408                 VMLINUX_SYMBOL(__kprobes_text_end) = .;
 409
 410 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
 411 #define IRQENTRY_TEXT                                                   \
 412                 ALIGN_FUNCTION();                                       \
 413                 VMLINUX_SYMBOL(__irqentry_text_start) = .;              \
 414                 *(.irqentry.text)                                       \
 415                 VMLINUX_SYMBOL(__irqentry_text_end) = .;
 416 #else
 417 #define IRQENTRY_TEXT
 418 #endif
 419
 420 /* Section used for early init (in .S files) */
 421 #define HEAD_TEXT  *(.head.text)
 422
 423 #define HEAD_TEXT_SECTION                                                       \
 424         .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) {               \
 425                 HEAD_TEXT                                               \
 426         }
 427
 428 /*
 429  * Exception table
 430  */
 431 #define EXCEPTION_TABLE(align)                                          \
 432         . = ALIGN(align);                                               \
 433         __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {               \
 434                 VMLINUX_SYMBOL(__start___ex_table) = .;                 \
 435                 *(__ex_table)                                           \
 436                 VMLINUX_SYMBOL(__stop___ex_table) = .;                  \
 437         }
 438
 439 /*
 440  * Init task
 441  */
 442 #define INIT_TASK_DATA_SECTION(align)                                   \
 443         . = ALIGN(align);                                               \
 444         .data..init_task :  AT(ADDR(.data..init_task) - LOAD_OFFSET) {  \
 445                 INIT_TASK_DATA(align)                                   \
 446         }
 447
 448 #ifdef CONFIG_CONSTRUCTORS
 449 #define KERNEL_CTORS()  . = ALIGN(8);                      \
 450                         VMLINUX_SYMBOL(__ctors_start) = .; \
 451                         *(.ctors)                          \
 452                         VMLINUX_SYMBOL(__ctors_end) = .;
 453 #else
 454 #define KERNEL_CTORS()
 455 #endif
 456
 457 /* init and exit section handling */
 458 #define INIT_DATA                                                       \
 459         *(.init.data)                                                   \
 460         DEV_DISCARD(init.data)                                          \
 461         CPU_DISCARD(init.data)                                          \
 462         MEM_DISCARD(init.data)                                          \
 463         KERNEL_CTORS()                                                  \
 464         *(.init.rodata)                                                 \
 465         MCOUNT_REC()                                                    \
 466         DEV_DISCARD(init.rodata)                                        \
 467         CPU_DISCARD(init.rodata)                                        \
 468         MEM_DISCARD(init.rodata)
 469
 470 #define INIT_TEXT                                                       \
 471         *(.init.text)                                                   \
 472         DEV_DISCARD(init.text)                                          \
 473         CPU_DISCARD(init.text)                                          \
 474         MEM_DISCARD(init.text)
 475
 476 #define EXIT_DATA                                                       \
 477         *(.exit.data)                                                   \
 478         DEV_DISCARD(exit.data)                                          \
 479         DEV_DISCARD(exit.rodata)                                        \
 480         CPU_DISCARD(exit.data)                                          \
 481         CPU_DISCARD(exit.rodata)                                        \
 482         MEM_DISCARD(exit.data)                                          \
 483         MEM_DISCARD(exit.rodata)
 484
 485 #define EXIT_TEXT                                                       \
 486         *(.exit.text)                                                   \
 487         DEV_DISCARD(exit.text)                                          \
 488         CPU_DISCARD(exit.text)                                          \
 489         MEM_DISCARD(exit.text)
 490
 491 #define EXIT_CALL                                                       \
 492         *(.exitcall.exit)
 493
 494 /*
 495  * bss (Block Started by Symbol) - uninitialized data
 496  * zeroed during startup
 497  */
 498 #define SBSS(sbss_align)                                                \
 499         . = ALIGN(sbss_align);                                          \
 500         .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) {                         \
 501                 *(.sbss)                                                \
 502                 *(.scommon)                                             \
 503         }
 504
 505 #define BSS(bss_align)                                                  \
 506         . = ALIGN(bss_align);                                           \
 507         .bss : AT(ADDR(.bss) - LOAD_OFFSET) {                           \
 508                 *(.bss..page_aligned)                                   \
 509                 *(.dynbss)                                              \
 510                 *(.bss)                                                 \
 511                 *(COMMON)                                               \
 512         }
 513
 514 /*
 515  * DWARF debug sections.
 516  * Symbols in the DWARF debugging sections are relative to
 517  * the beginning of the section so we begin them at 0.
 518  */
 519 #define DWARF_DEBUG                                                     \
 520                 /* DWARF 1 */                                           \
 521                 .debug          0 : { *(.debug) }                       \
 522                 .line           0 : { *(.line) }                        \
 523                 /* GNU DWARF 1 extensions */                            \
 524                 .debug_srcinfo  0 : { *(.debug_srcinfo) }               \
 525                 .debug_sfnames  0 : { *(.debug_sfnames) }               \
 526                 /* DWARF 1.1 and DWARF 2 */                             \
 527                 .debug_aranges  0 : { *(.debug_aranges) }               \
 528                 .debug_pubnames 0 : { *(.debug_pubnames) }              \
 529                 /* DWARF 2 */                                           \
 530                 .debug_info     0 : { *(.debug_info                     \
 531                                 .gnu.linkonce.wi.*) }                   \
 532                 .debug_abbrev   0 : { *(.debug_abbrev) }                \
 533                 .debug_line     0 : { *(.debug_line) }                  \
 534                 .debug_frame    0 : { *(.debug_frame) }                 \
 535                 .debug_str      0 : { *(.debug_str) }                   \
 536                 .debug_loc      0 : { *(.debug_loc) }                   \
 537                 .debug_macinfo  0 : { *(.debug_macinfo) }               \
 538                 /* SGI/MIPS DWARF 2 extensions */                       \
 539                 .debug_weaknames 0 : { *(.debug_weaknames) }            \
 540                 .debug_funcnames 0 : { *(.debug_funcnames) }            \
 541                 .debug_typenames 0 : { *(.debug_typenames) }            \
 542                 .debug_varnames  0 : { *(.debug_varnames) }             \
 543
 544                 /* Stabs debugging sections.  */
 545 #define STABS_DEBUG                                                     \
 546                 .stab 0 : { *(.stab) }                                  \
 547                 .stabstr 0 : { *(.stabstr) }                            \
 548                 .stab.excl 0 : { *(.stab.excl) }                        \
 549                 .stab.exclstr 0 : { *(.stab.exclstr) }                  \
 550                 .stab.index 0 : { *(.stab.index) }                      \
 551                 .stab.indexstr 0 : { *(.stab.indexstr) }                \
 552                 .comment 0 : { *(.comment) }
 553
 554 #ifdef CONFIG_GENERIC_BUG
 555 #define BUG_TABLE                                                       \
 556         . = ALIGN(8);                                                   \
 557         __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) {             \
 558                 VMLINUX_SYMBOL(__start___bug_table) = .;                \
 559                 *(__bug_table)                                          \
 560                 VMLINUX_SYMBOL(__stop___bug_table) = .;                 \
 561         }
 562 #else
 563 #define BUG_TABLE
 564 #endif
 565
 566 #ifdef CONFIG_PM_TRACE
 567 #define TRACEDATA                                                       \
 568         . = ALIGN(4);                                                   \
 569         .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) {               \
 570                 VMLINUX_SYMBOL(__tracedata_start) = .;                  \
 571                 *(.tracedata)                                           \
 572                 VMLINUX_SYMBOL(__tracedata_end) = .;                    \
 573         }
 574 #else
 575 #define TRACEDATA
 576 #endif
 577
 578 #define NOTES                                                           \
 579         .notes : AT(ADDR(.notes) - LOAD_OFFSET) {                       \
 580                 VMLINUX_SYMBOL(__start_notes) = .;                      \
 581                 *(.note.*)                                              \
 582                 VMLINUX_SYMBOL(__stop_notes) = .;                       \
 583         }
 584
 585 #define INIT_SETUP(initsetup_align)                                     \
 586                 . = ALIGN(initsetup_align);                             \
 587                 VMLINUX_SYMBOL(__setup_start) = .;                      \
 588                 *(.init.setup)                                          \
 589                 VMLINUX_SYMBOL(__setup_end) = .;
 590
 591 #define INITCALLS                                                       \
 592         *(.initcallearly.init)                                          \
 593         VMLINUX_SYMBOL(__early_initcall_end) = .;                       \
 594         *(.initcall0.init)                                              \
 595         *(.initcall0s.init)                                             \
 596         *(.initcall1.init)                                              \
 597         *(.initcall1s.init)                                             \
 598         *(.initcall2.init)                                              \
 599         *(.initcall2s.init)                                             \
 600         *(.initcall3.init)                                              \
 601         *(.initcall3s.init)                                             \
 602         *(.initcall4.init)                                              \
 603         *(.initcall4s.init)                                             \
 604         *(.initcall5.init)                                              \
 605         *(.initcall5s.init)                                             \
 606         *(.initcallrootfs.init)                                         \
 607         *(.initcall6.init)                                              \
 608         *(.initcall6s.init)                                             \
 609         *(.initcall7.init)                                              \
 610         *(.initcall7s.init)
 611
 612 #define INIT_CALLS                                                      \
 613                 VMLINUX_SYMBOL(__initcall_start) = .;                   \
 614                 INITCALLS                                               \
 615                 VMLINUX_SYMBOL(__initcall_end) = .;
 616
 617 #define CON_INITCALL                                                    \
 618                 VMLINUX_SYMBOL(__con_initcall_start) = .;               \
 619                 *(.con_initcall.init)                                   \
 620                 VMLINUX_SYMBOL(__con_initcall_end) = .;
 621
 622 #define SECURITY_INITCALL                                               \
 623                 VMLINUX_SYMBOL(__security_initcall_start) = .;          \
 624                 *(.security_initcall.init)                              \
 625                 VMLINUX_SYMBOL(__security_initcall_end) = .;
 626
 627 #ifdef CONFIG_BLK_DEV_INITRD
 628 #define INIT_RAM_FS                                                     \
 629         . = ALIGN(PAGE_SIZE);                                           \
 630         VMLINUX_SYMBOL(__initramfs_start) = .;                          \
 631         *(.init.ramfs)                                                  \
 632         VMLINUX_SYMBOL(__initramfs_end) = .;
 633 #else
 634 #define INIT_RAM_FS
 635 #endif
 636
 637 /*
 638  * Default discarded sections.
 639  *
 640  * Some archs want to discard exit text/data at runtime rather than
 641  * link time due to cross-section references such as alt instructions,
 642  * bug table, eh_frame, etc.  DISCARDS must be the last of output
 643  * section definitions so that such archs put those in earlier section
 644  * definitions.
 645  */
 646 #define DISCARDS                                                        \
 647         /DISCARD/ : {                                                   \
 648         EXIT_TEXT                                                       \
 649         EXIT_DATA                                                       \
 650         EXIT_CALL                                                       \
 651         *(.discard)                                                     \
 652         *(.discard.*)                                                   \
 653         }
 654
 655 /**
 656  * PERCPU_VADDR - define output section for percpu area
 657  * @vaddr: explicit base address (optional)
 658  * @phdr: destination PHDR (optional)
 659  *
 660  * Macro which expands to output section for percpu area.  If @vaddr
 661  * is not blank, it specifies explicit base address and all percpu
 662  * symbols will be offset from the given address.  If blank, @vaddr
 663  * always equals @laddr + LOAD_OFFSET.
 664  *
 665  * @phdr defines the output PHDR to use if not blank.  Be warned that
 666  * output PHDR is sticky.  If @phdr is specified, the next output
 667  * section in the linker script will go there too.  @phdr should have
 668  * a leading colon.
 669  *
 670  * Note that this macros defines __per_cpu_load as an absolute symbol.
 671  * If there is no need to put the percpu section at a predetermined
 672  * address, use PERCPU().
 673  */
 674 #define PERCPU_VADDR(vaddr, phdr)                                       \
 675         VMLINUX_SYMBOL(__per_cpu_load) = .;                             \
 676         .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load)         \
 677                                 - LOAD_OFFSET) {                        \
 678                 VMLINUX_SYMBOL(__per_cpu_start) = .;                    \
 679                 *(.data..percpu..first)                                 \
 680                 *(.data..percpu..page_aligned)                          \
 681                 *(.data..percpu)                                        \
 682                 *(.data..percpu..shared_aligned)                        \
 683                 VMLINUX_SYMBOL(__per_cpu_end) = .;                      \
 684         } phdr                                                          \
 685         . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu);
 686
 687 /**
 688  * PERCPU - define output section for percpu area, simple version
 689  * @align: required alignment
 690  *
 691  * Align to @align and outputs output section for percpu area.  This
 692  * macro doesn't maniuplate @vaddr or @phdr and __per_cpu_load and
 693  * __per_cpu_start will be identical.
 694  *
 695  * This macro is equivalent to ALIGN(align); PERCPU_VADDR( , ) except
 696  * that __per_cpu_load is defined as a relative symbol against
 697  * .data..percpu which is required for relocatable x86_32
 698  * configuration.
 699  */
 700 #define PERCPU(align)                                                   \
 701         . = ALIGN(align);                                               \
 702         .data..percpu   : AT(ADDR(.data..percpu) - LOAD_OFFSET) {       \
 703                 VMLINUX_SYMBOL(__per_cpu_load) = .;                     \
 704                 VMLINUX_SYMBOL(__per_cpu_start) = .;                    \
 705                 *(.data..percpu..first)                                 \
 706                 *(.data..percpu..page_aligned)                          \
 707                 *(.data..percpu)                                        \
 708                 *(.data..percpu..shared_aligned)                        \
 709                 VMLINUX_SYMBOL(__per_cpu_end) = .;                      \
 710         }
 711
 712
 713 /*
 714  * Definition of the high level *_SECTION macros
 715  * They will fit only a subset of the architectures
 716  */
 717
 718
 719 /*
 720  * Writeable data.
 721  * All sections are combined in a single .data section.
 722  * The sections following CONSTRUCTORS are arranged so their
 723  * typical alignment matches.
 724  * A cacheline is typical/always less than a PAGE_SIZE so
 725  * the sections that has this restriction (or similar)
 726  * is located before the ones requiring PAGE_SIZE alignment.
 727  * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
 728  * matches the requirment of PAGE_ALIGNED_DATA.
 729  *
 730  * use 0 as page_align if page_aligned data is not used */
 731 #define RW_DATA_SECTION(cacheline, pagealigned, inittask)               \
 732         . = ALIGN(PAGE_SIZE);                                           \
 733         .data : AT(ADDR(.data) - LOAD_OFFSET) {                         \
 734                 INIT_TASK_DATA(inittask)                                \
 735                 NOSAVE_DATA                                             \
 736                 PAGE_ALIGNED_DATA(pagealigned)                          \
 737                 CACHELINE_ALIGNED_DATA(cacheline)                       \
 738                 READ_MOSTLY_DATA(cacheline)                             \
 739                 DATA_DATA                                               \
 740                 CONSTRUCTORS                                            \
 741         }
 742
 743 #define INIT_TEXT_SECTION(inittext_align)                               \
 744         . = ALIGN(inittext_align);                                      \
 745         .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {               \
 746                 VMLINUX_SYMBOL(_sinittext) = .;                         \
 747                 INIT_TEXT                                               \
 748                 VMLINUX_SYMBOL(_einittext) = .;                         \
 749         }
 750
 751 #define INIT_DATA_SECTION(initsetup_align)                              \
 752         .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {               \
 753                 INIT_DATA                                               \
 754                 INIT_SETUP(initsetup_align)                             \
 755                 INIT_CALLS                                              \
 756                 CON_INITCALL                                            \
 757                 SECURITY_INITCALL                                       \
 758                 INIT_RAM_FS                                             \
 759         }
 760
 761 #define BSS_SECTION(sbss_align, bss_align, stop_align)                  \
 762         . = ALIGN(sbss_align);                                          \
 763         VMLINUX_SYMBOL(__bss_start) = .;                                \
 764         SBSS(sbss_align)                                                \
 765         BSS(bss_align)                                                  \
 766         . = ALIGN(stop_align);                                          \
 767         VMLINUX_SYMBOL(__bss_stop) = .;