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   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 VMLINUX_SYMBOL
  56 #define VMLINUX_SYMBOL(_sym_) _sym_
  57 #endif
  58
  59 /* Align . to a 8 byte boundary equals to maximum function alignment. */
  60 #define ALIGN_FUNCTION()  . = ALIGN(8)
  61
  62 /* The actual configuration determine if the init/exit sections
  63  * are handled as text/data or they can be discarded (which
  64  * often happens at runtime)
  65  */
  66 #ifdef CONFIG_HOTPLUG
  67 #define DEV_KEEP(sec)    *(.dev##sec)
  68 #define DEV_DISCARD(sec)
  69 #else
  70 #define DEV_KEEP(sec)
  71 #define DEV_DISCARD(sec) *(.dev##sec)
  72 #endif
  73
  74 #ifdef CONFIG_HOTPLUG_CPU
  75 #define CPU_KEEP(sec)    *(.cpu##sec)
  76 #define CPU_DISCARD(sec)
  77 #else
  78 #define CPU_KEEP(sec)
  79 #define CPU_DISCARD(sec) *(.cpu##sec)
  80 #endif
  81
  82 #if defined(CONFIG_MEMORY_HOTPLUG)
  83 #define MEM_KEEP(sec)    *(.mem##sec)
  84 #define MEM_DISCARD(sec)
  85 #else
  86 #define MEM_KEEP(sec)
  87 #define MEM_DISCARD(sec) *(.mem##sec)
  88 #endif
  89
  90 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
  91 #define MCOUNT_REC()    VMLINUX_SYMBOL(__start_mcount_loc) = .; \
  92                         *(__mcount_loc)                         \
  93                         VMLINUX_SYMBOL(__stop_mcount_loc) = .;
  94 #else
  95 #define MCOUNT_REC()
  96 #endif
  97
  98 #ifdef CONFIG_TRACE_BRANCH_PROFILING
  99 #define LIKELY_PROFILE()        VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \
 100                                 *(_ftrace_annotated_branch)                           \
 101                                 VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .;
 102 #else
 103 #define LIKELY_PROFILE()
 104 #endif
 105
 106 #ifdef CONFIG_PROFILE_ALL_BRANCHES
 107 #define BRANCH_PROFILE()        VMLINUX_SYMBOL(__start_branch_profile) = .;   \
 108                                 *(_ftrace_branch)                             \
 109                                 VMLINUX_SYMBOL(__stop_branch_profile) = .;
 110 #else
 111 #define BRANCH_PROFILE()
 112 #endif
 113
 114 #ifdef CONFIG_EVENT_TRACING
 115 #define FTRACE_EVENTS() VMLINUX_SYMBOL(__start_ftrace_events) = .;      \
 116                         *(_ftrace_events)                               \
 117                         VMLINUX_SYMBOL(__stop_ftrace_events) = .;
 118 #else
 119 #define FTRACE_EVENTS()
 120 #endif
 121
 122 #ifdef CONFIG_TRACING
 123 #define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .;      \
 124                          *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \
 125                          VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .;
 126 #else
 127 #define TRACE_PRINTKS()
 128 #endif
 129
 130 #ifdef CONFIG_FTRACE_SYSCALLS
 131 #define TRACE_SYSCALLS() VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \
 132                          *(__syscalls_metadata)                         \
 133                          VMLINUX_SYMBOL(__stop_syscalls_metadata) = .;
 134 #else
 135 #define TRACE_SYSCALLS()
 136 #endif
 137
 138 /* .data section */
 139 #define DATA_DATA                                                       \
 140         *(.data)                                                        \
 141         *(.ref.data)                                                    \
 142         DEV_KEEP(init.data)                                             \
 143         DEV_KEEP(exit.data)                                             \
 144         CPU_KEEP(init.data)                                             \
 145         CPU_KEEP(exit.data)                                             \
 146         MEM_KEEP(init.data)                                             \
 147         MEM_KEEP(exit.data)                                             \
 148         . = ALIGN(8);                                                   \
 149         VMLINUX_SYMBOL(__start___markers) = .;                          \
 150         *(__markers)                                                    \
 151         VMLINUX_SYMBOL(__stop___markers) = .;                           \
 152         . = ALIGN(32);                                                  \
 153         VMLINUX_SYMBOL(__start___tracepoints) = .;                      \
 154         *(__tracepoints)                                                \
 155         VMLINUX_SYMBOL(__stop___tracepoints) = .;                       \
 156         /* implement dynamic printk debug */                            \
 157         . = ALIGN(8);                                                   \
 158         VMLINUX_SYMBOL(__start___verbose) = .;                          \
 159         *(__verbose)                                                    \
 160         VMLINUX_SYMBOL(__stop___verbose) = .;                           \
 161         LIKELY_PROFILE()                                                \
 162         BRANCH_PROFILE()                                                \
 163         TRACE_PRINTKS()                                                 \
 164         FTRACE_EVENTS()                                                 \
 165         TRACE_SYSCALLS()
 166
 167 /*
 168  * Data section helpers
 169  */
 170 #define NOSAVE_DATA                                                     \
 171         . = ALIGN(PAGE_SIZE);                                           \
 172         VMLINUX_SYMBOL(__nosave_begin) = .;                             \
 173         *(.data.nosave)                                                 \
 174         . = ALIGN(PAGE_SIZE);                                           \
 175         VMLINUX_SYMBOL(__nosave_end) = .;
 176
 177 #define PAGE_ALIGNED_DATA(page_align)                                   \
 178         . = ALIGN(page_align);                                          \
 179         *(.data.page_aligned)
 180
 181 #define READ_MOSTLY_DATA(align)                                         \
 182         . = ALIGN(align);                                               \
 183         *(.data.read_mostly)
 184
 185 #define CACHELINE_ALIGNED_DATA(align)                                   \
 186         . = ALIGN(align);                                               \
 187         *(.data.cacheline_aligned)
 188
 189 #define INIT_TASK_DATA(align)                                           \
 190         . = ALIGN(align);                                               \
 191         *(.data.init_task)
 192
 193 /*
 194  * Read only Data
 195  */
 196 #define RO_DATA_SECTION(align)                                          \
 197         . = ALIGN((align));                                             \
 198         .rodata           : AT(ADDR(.rodata) - LOAD_OFFSET) {           \
 199                 VMLINUX_SYMBOL(__start_rodata) = .;                     \
 200                 *(.rodata) *(.rodata.*)                                 \
 201                 *(__vermagic)           /* Kernel version magic */      \
 202                 *(__markers_strings)    /* Markers: strings */          \
 203                 *(__tracepoints_strings)/* Tracepoints: strings */      \
 204         }                                                               \
 205                                                                         \
 206         .rodata1          : AT(ADDR(.rodata1) - LOAD_OFFSET) {          \
 207                 *(.rodata1)                                             \
 208         }                                                               \
 209                                                                         \
 210         BUG_TABLE                                                       \
 211                                                                         \
 212         /* PCI quirks */                                                \
 213         .pci_fixup        : AT(ADDR(.pci_fixup) - LOAD_OFFSET) {        \
 214                 VMLINUX_SYMBOL(__start_pci_fixups_early) = .;           \
 215                 *(.pci_fixup_early)                                     \
 216                 VMLINUX_SYMBOL(__end_pci_fixups_early) = .;             \
 217                 VMLINUX_SYMBOL(__start_pci_fixups_header) = .;          \
 218                 *(.pci_fixup_header)                                    \
 219                 VMLINUX_SYMBOL(__end_pci_fixups_header) = .;            \
 220                 VMLINUX_SYMBOL(__start_pci_fixups_final) = .;           \
 221                 *(.pci_fixup_final)                                     \
 222                 VMLINUX_SYMBOL(__end_pci_fixups_final) = .;             \
 223                 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .;          \
 224                 *(.pci_fixup_enable)                                    \
 225                 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .;            \
 226                 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .;          \
 227                 *(.pci_fixup_resume)                                    \
 228                 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .;            \
 229                 VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .;    \
 230                 *(.pci_fixup_resume_early)                              \
 231                 VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .;      \
 232                 VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .;         \
 233                 *(.pci_fixup_suspend)                                   \
 234                 VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .;           \
 235         }                                                               \
 236                                                                         \
 237         /* Built-in firmware blobs */                                   \
 238         .builtin_fw        : AT(ADDR(.builtin_fw) - LOAD_OFFSET) {      \
 239                 VMLINUX_SYMBOL(__start_builtin_fw) = .;                 \
 240                 *(.builtin_fw)                                          \
 241                 VMLINUX_SYMBOL(__end_builtin_fw) = .;                   \
 242         }                                                               \
 243                                                                         \
 244         /* RapidIO route ops */                                         \
 245         .rio_route        : AT(ADDR(.rio_route) - LOAD_OFFSET) {        \
 246                 VMLINUX_SYMBOL(__start_rio_route_ops) = .;              \
 247                 *(.rio_route_ops)                                       \
 248                 VMLINUX_SYMBOL(__end_rio_route_ops) = .;                \
 249         }                                                               \
 250                                                                         \
 251         TRACEDATA                                                       \
 252                                                                         \
 253         /* Kernel symbol table: Normal symbols */                       \
 254         __ksymtab         : AT(ADDR(__ksymtab) - LOAD_OFFSET) {         \
 255                 VMLINUX_SYMBOL(__start___ksymtab) = .;                  \
 256                 *(__ksymtab)                                            \
 257                 VMLINUX_SYMBOL(__stop___ksymtab) = .;                   \
 258         }                                                               \
 259                                                                         \
 260         /* Kernel symbol table: GPL-only symbols */                     \
 261         __ksymtab_gpl     : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) {     \
 262                 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .;              \
 263                 *(__ksymtab_gpl)                                        \
 264                 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .;               \
 265         }                                                               \
 266                                                                         \
 267         /* Kernel symbol table: Normal unused symbols */                \
 268         __ksymtab_unused  : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) {  \
 269                 VMLINUX_SYMBOL(__start___ksymtab_unused) = .;           \
 270                 *(__ksymtab_unused)                                     \
 271                 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .;            \
 272         }                                                               \
 273                                                                         \
 274         /* Kernel symbol table: GPL-only unused symbols */              \
 275         __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
 276                 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .;       \
 277                 *(__ksymtab_unused_gpl)                                 \
 278                 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .;        \
 279         }                                                               \
 280                                                                         \
 281         /* Kernel symbol table: GPL-future-only symbols */              \
 282         __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
 283                 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .;       \
 284                 *(__ksymtab_gpl_future)                                 \
 285                 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .;        \
 286         }                                                               \
 287                                                                         \
 288         /* Kernel symbol table: Normal symbols */                       \
 289         __kcrctab         : AT(ADDR(__kcrctab) - LOAD_OFFSET) {         \
 290                 VMLINUX_SYMBOL(__start___kcrctab) = .;                  \
 291                 *(__kcrctab)                                            \
 292                 VMLINUX_SYMBOL(__stop___kcrctab) = .;                   \
 293         }                                                               \
 294                                                                         \
 295         /* Kernel symbol table: GPL-only symbols */                     \
 296         __kcrctab_gpl     : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) {     \
 297                 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .;              \
 298                 *(__kcrctab_gpl)                                        \
 299                 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .;               \
 300         }                                                               \
 301                                                                         \
 302         /* Kernel symbol table: Normal unused symbols */                \
 303         __kcrctab_unused  : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) {  \
 304                 VMLINUX_SYMBOL(__start___kcrctab_unused) = .;           \
 305                 *(__kcrctab_unused)                                     \
 306                 VMLINUX_SYMBOL(__stop___kcrctab_unused) = .;            \
 307         }                                                               \
 308                                                                         \
 309         /* Kernel symbol table: GPL-only unused symbols */              \
 310         __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
 311                 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .;       \
 312                 *(__kcrctab_unused_gpl)                                 \
 313                 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .;        \
 314         }                                                               \
 315                                                                         \
 316         /* Kernel symbol table: GPL-future-only symbols */              \
 317         __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
 318                 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .;       \
 319                 *(__kcrctab_gpl_future)                                 \
 320                 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .;        \
 321         }                                                               \
 322                                                                         \
 323         /* Kernel symbol table: strings */                              \
 324         __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
 325                 *(__ksymtab_strings)                                    \
 326         }                                                               \
 327                                                                         \
 328         /* __*init sections */                                          \
 329         __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) {         \
 330                 *(.ref.rodata)                                          \
 331                 MCOUNT_REC()                                            \
 332                 DEV_KEEP(init.rodata)                                   \
 333                 DEV_KEEP(exit.rodata)                                   \
 334                 CPU_KEEP(init.rodata)                                   \
 335                 CPU_KEEP(exit.rodata)                                   \
 336                 MEM_KEEP(init.rodata)                                   \
 337                 MEM_KEEP(exit.rodata)                                   \
 338         }                                                               \
 339                                                                         \
 340         /* Built-in module parameters. */                               \
 341         __param : AT(ADDR(__param) - LOAD_OFFSET) {                     \
 342                 VMLINUX_SYMBOL(__start___param) = .;                    \
 343                 *(__param)                                              \
 344                 VMLINUX_SYMBOL(__stop___param) = .;                     \
 345                 . = ALIGN((align));                                     \
 346                 VMLINUX_SYMBOL(__end_rodata) = .;                       \
 347         }                                                               \
 348         . = ALIGN((align));
 349
 350 /* RODATA & RO_DATA provided for backward compatibility.
 351  * All archs are supposed to use RO_DATA() */
 352 #define RODATA          RO_DATA_SECTION(4096)
 353 #define RO_DATA(align)  RO_DATA_SECTION(align)
 354
 355 #define SECURITY_INIT                                                   \
 356         .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
 357                 VMLINUX_SYMBOL(__security_initcall_start) = .;          \
 358                 *(.security_initcall.init)                              \
 359                 VMLINUX_SYMBOL(__security_initcall_end) = .;            \
 360         }
 361
 362 /* .text section. Map to function alignment to avoid address changes
 363  * during second ld run in second ld pass when generating System.map */
 364 #define TEXT_TEXT                                                       \
 365                 ALIGN_FUNCTION();                                       \
 366                 *(.text.hot)                                            \
 367                 *(.text)                                                \
 368                 *(.ref.text)                                            \
 369         DEV_KEEP(init.text)                                             \
 370         DEV_KEEP(exit.text)                                             \
 371         CPU_KEEP(init.text)                                             \
 372         CPU_KEEP(exit.text)                                             \
 373         MEM_KEEP(init.text)                                             \
 374         MEM_KEEP(exit.text)                                             \
 375                 *(.text.unlikely)
 376
 377
 378 /* sched.text is aling to function alignment to secure we have same
 379  * address even at second ld pass when generating System.map */
 380 #define SCHED_TEXT                                                      \
 381                 ALIGN_FUNCTION();                                       \
 382                 VMLINUX_SYMBOL(__sched_text_start) = .;                 \
 383                 *(.sched.text)                                          \
 384                 VMLINUX_SYMBOL(__sched_text_end) = .;
 385
 386 /* spinlock.text is aling to function alignment to secure we have same
 387  * address even at second ld pass when generating System.map */
 388 #define LOCK_TEXT                                                       \
 389                 ALIGN_FUNCTION();                                       \
 390                 VMLINUX_SYMBOL(__lock_text_start) = .;                  \
 391                 *(.spinlock.text)                                       \
 392                 VMLINUX_SYMBOL(__lock_text_end) = .;
 393
 394 #define KPROBES_TEXT                                                    \
 395                 ALIGN_FUNCTION();                                       \
 396                 VMLINUX_SYMBOL(__kprobes_text_start) = .;               \
 397                 *(.kprobes.text)                                        \
 398                 VMLINUX_SYMBOL(__kprobes_text_end) = .;
 399
 400 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
 401 #define IRQENTRY_TEXT                                                   \
 402                 ALIGN_FUNCTION();                                       \
 403                 VMLINUX_SYMBOL(__irqentry_text_start) = .;              \
 404                 *(.irqentry.text)                                       \
 405                 VMLINUX_SYMBOL(__irqentry_text_end) = .;
 406 #else
 407 #define IRQENTRY_TEXT
 408 #endif
 409
 410 /* Section used for early init (in .S files) */
 411 #define HEAD_TEXT  *(.head.text)
 412
 413 #define HEAD_TEXT_SECTION                                                       \
 414         .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) {               \
 415                 HEAD_TEXT                                               \
 416         }
 417
 418 /*
 419  * Exception table
 420  */
 421 #define EXCEPTION_TABLE(align)                                          \
 422         . = ALIGN(align);                                               \
 423         __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {               \
 424                 VMLINUX_SYMBOL(__start___ex_table) = .;                 \
 425                 *(__ex_table)                                           \
 426                 VMLINUX_SYMBOL(__stop___ex_table) = .;                  \
 427         }
 428
 429 /*
 430  * Init task
 431  */
 432 #define INIT_TASK_DATA_SECTION(align)                                   \
 433         . = ALIGN(align);                                               \
 434         .data.init_task : {                                             \
 435                 INIT_TASK_DATA(align)                                   \
 436         }
 437
 438 #ifdef CONFIG_CONSTRUCTORS
 439 #define KERNEL_CTORS()  . = ALIGN(8);                      \
 440                         VMLINUX_SYMBOL(__ctors_start) = .; \
 441                         *(.ctors)                          \
 442                         VMLINUX_SYMBOL(__ctors_end) = .;
 443 #else
 444 #define KERNEL_CTORS()
 445 #endif
 446
 447 /* init and exit section handling */
 448 #define INIT_DATA                                                       \
 449         *(.init.data)                                                   \
 450         DEV_DISCARD(init.data)                                          \
 451         CPU_DISCARD(init.data)                                          \
 452         MEM_DISCARD(init.data)                                          \
 453         KERNEL_CTORS()                                                  \
 454         *(.init.rodata)                                                 \
 455         DEV_DISCARD(init.rodata)                                        \
 456         CPU_DISCARD(init.rodata)                                        \
 457         MEM_DISCARD(init.rodata)
 458
 459 #define INIT_TEXT                                                       \
 460         *(.init.text)                                                   \
 461         DEV_DISCARD(init.text)                                          \
 462         CPU_DISCARD(init.text)                                          \
 463         MEM_DISCARD(init.text)
 464
 465 #define EXIT_DATA                                                       \
 466         *(.exit.data)                                                   \
 467         DEV_DISCARD(exit.data)                                          \
 468         DEV_DISCARD(exit.rodata)                                        \
 469         CPU_DISCARD(exit.data)                                          \
 470         CPU_DISCARD(exit.rodata)                                        \
 471         MEM_DISCARD(exit.data)                                          \
 472         MEM_DISCARD(exit.rodata)
 473
 474 #define EXIT_TEXT                                                       \
 475         *(.exit.text)                                                   \
 476         DEV_DISCARD(exit.text)                                          \
 477         CPU_DISCARD(exit.text)                                          \
 478         MEM_DISCARD(exit.text)
 479
 480 #define EXIT_CALL                                                       \
 481         *(.exitcall.exit)
 482
 483 /*
 484  * bss (Block Started by Symbol) - uninitialized data
 485  * zeroed during startup
 486  */
 487 #define SBSS(sbss_align)                                                \
 488         . = ALIGN(sbss_align);                                          \
 489         .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) {                         \
 490                 *(.sbss)                                                \
 491                 *(.scommon)                                             \
 492         }
 493
 494 #define BSS(bss_align)                                                  \
 495         . = ALIGN(bss_align);                                           \
 496         .bss : AT(ADDR(.bss) - LOAD_OFFSET) {                           \
 497                 *(.bss.page_aligned)                                    \
 498                 *(.dynbss)                                              \
 499                 *(.bss)                                                 \
 500                 *(COMMON)                                               \
 501         }
 502
 503 /*
 504  * DWARF debug sections.
 505  * Symbols in the DWARF debugging sections are relative to
 506  * the beginning of the section so we begin them at 0.
 507  */
 508 #define DWARF_DEBUG                                                     \
 509                 /* DWARF 1 */                                           \
 510                 .debug          0 : { *(.debug) }                       \
 511                 .line           0 : { *(.line) }                        \
 512                 /* GNU DWARF 1 extensions */                            \
 513                 .debug_srcinfo  0 : { *(.debug_srcinfo) }               \
 514                 .debug_sfnames  0 : { *(.debug_sfnames) }               \
 515                 /* DWARF 1.1 and DWARF 2 */                             \
 516                 .debug_aranges  0 : { *(.debug_aranges) }               \
 517                 .debug_pubnames 0 : { *(.debug_pubnames) }              \
 518                 /* DWARF 2 */                                           \
 519                 .debug_info     0 : { *(.debug_info                     \
 520                                 .gnu.linkonce.wi.*) }                   \
 521                 .debug_abbrev   0 : { *(.debug_abbrev) }                \
 522                 .debug_line     0 : { *(.debug_line) }                  \
 523                 .debug_frame    0 : { *(.debug_frame) }                 \
 524                 .debug_str      0 : { *(.debug_str) }                   \
 525                 .debug_loc      0 : { *(.debug_loc) }                   \
 526                 .debug_macinfo  0 : { *(.debug_macinfo) }               \
 527                 /* SGI/MIPS DWARF 2 extensions */                       \
 528                 .debug_weaknames 0 : { *(.debug_weaknames) }            \
 529                 .debug_funcnames 0 : { *(.debug_funcnames) }            \
 530                 .debug_typenames 0 : { *(.debug_typenames) }            \
 531                 .debug_varnames  0 : { *(.debug_varnames) }             \
 532
 533                 /* Stabs debugging sections.  */
 534 #define STABS_DEBUG                                                     \
 535                 .stab 0 : { *(.stab) }                                  \
 536                 .stabstr 0 : { *(.stabstr) }                            \
 537                 .stab.excl 0 : { *(.stab.excl) }                        \
 538                 .stab.exclstr 0 : { *(.stab.exclstr) }                  \
 539                 .stab.index 0 : { *(.stab.index) }                      \
 540                 .stab.indexstr 0 : { *(.stab.indexstr) }                \
 541                 .comment 0 : { *(.comment) }
 542
 543 #ifdef CONFIG_GENERIC_BUG
 544 #define BUG_TABLE                                                       \
 545         . = ALIGN(8);                                                   \
 546         __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) {             \
 547                 VMLINUX_SYMBOL(__start___bug_table) = .;                \
 548                 *(__bug_table)                                          \
 549                 VMLINUX_SYMBOL(__stop___bug_table) = .;                 \
 550         }
 551 #else
 552 #define BUG_TABLE
 553 #endif
 554
 555 #ifdef CONFIG_PM_TRACE
 556 #define TRACEDATA                                                       \
 557         . = ALIGN(4);                                                   \
 558         .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) {               \
 559                 VMLINUX_SYMBOL(__tracedata_start) = .;                  \
 560                 *(.tracedata)                                           \
 561                 VMLINUX_SYMBOL(__tracedata_end) = .;                    \
 562         }
 563 #else
 564 #define TRACEDATA
 565 #endif
 566
 567 #define NOTES                                                           \
 568         .notes : AT(ADDR(.notes) - LOAD_OFFSET) {                       \
 569                 VMLINUX_SYMBOL(__start_notes) = .;                      \
 570                 *(.note.*)                                              \
 571                 VMLINUX_SYMBOL(__stop_notes) = .;                       \
 572         }
 573
 574 #define INIT_SETUP(initsetup_align)                                     \
 575                 . = ALIGN(initsetup_align);                             \
 576                 VMLINUX_SYMBOL(__setup_start) = .;                      \
 577                 *(.init.setup)                                          \
 578                 VMLINUX_SYMBOL(__setup_end) = .;
 579
 580 #define INITCALLS                                                       \
 581         *(.initcallearly.init)                                          \
 582         VMLINUX_SYMBOL(__early_initcall_end) = .;                       \
 583         *(.initcall0.init)                                              \
 584         *(.initcall0s.init)                                             \
 585         *(.initcall1.init)                                              \
 586         *(.initcall1s.init)                                             \
 587         *(.initcall2.init)                                              \
 588         *(.initcall2s.init)                                             \
 589         *(.initcall3.init)                                              \
 590         *(.initcall3s.init)                                             \
 591         *(.initcall4.init)                                              \
 592         *(.initcall4s.init)                                             \
 593         *(.initcall5.init)                                              \
 594         *(.initcall5s.init)                                             \
 595         *(.initcallrootfs.init)                                         \
 596         *(.initcall6.init)                                              \
 597         *(.initcall6s.init)                                             \
 598         *(.initcall7.init)                                              \
 599         *(.initcall7s.init)
 600
 601 #define INIT_CALLS                                                      \
 602                 VMLINUX_SYMBOL(__initcall_start) = .;                   \
 603                 INITCALLS                                               \
 604                 VMLINUX_SYMBOL(__initcall_end) = .;
 605
 606 #define CON_INITCALL                                                    \
 607                 VMLINUX_SYMBOL(__con_initcall_start) = .;               \
 608                 *(.con_initcall.init)                                   \
 609                 VMLINUX_SYMBOL(__con_initcall_end) = .;
 610
 611 #define SECURITY_INITCALL                                               \
 612                 VMLINUX_SYMBOL(__security_initcall_start) = .;          \
 613                 *(.security_initcall.init)                              \
 614                 VMLINUX_SYMBOL(__security_initcall_end) = .;
 615
 616 #ifdef CONFIG_BLK_DEV_INITRD
 617 #define INIT_RAM_FS                                                     \
 618         . = ALIGN(PAGE_SIZE);                                           \
 619         VMLINUX_SYMBOL(__initramfs_start) = .;                          \
 620         *(.init.ramfs)                                                  \
 621         VMLINUX_SYMBOL(__initramfs_end) = .;
 622 #else
 623 #define INIT_RAM_FS
 624 #endif
 625
 626 /*
 627  * Default discarded sections.
 628  *
 629  * Some archs want to discard exit text/data at runtime rather than
 630  * link time due to cross-section references such as alt instructions,
 631  * bug table, eh_frame, etc.  DISCARDS must be the last of output
 632  * section definitions so that such archs put those in earlier section
 633  * definitions.
 634  */
 635 #define DISCARDS                                                        \
 636         /DISCARD/ : {                                                   \
 637         EXIT_TEXT                                                       \
 638         EXIT_DATA                                                       \
 639         EXIT_CALL                                                       \
 640         *(.discard)                                                     \
 641         }
 642
 643 /**
 644  * PERCPU_VADDR - define output section for percpu area
 645  * @vaddr: explicit base address (optional)
 646  * @phdr: destination PHDR (optional)
 647  *
 648  * Macro which expands to output section for percpu area.  If @vaddr
 649  * is not blank, it specifies explicit base address and all percpu
 650  * symbols will be offset from the given address.  If blank, @vaddr
 651  * always equals @laddr + LOAD_OFFSET.
 652  *
 653  * @phdr defines the output PHDR to use if not blank.  Be warned that
 654  * output PHDR is sticky.  If @phdr is specified, the next output
 655  * section in the linker script will go there too.  @phdr should have
 656  * a leading colon.
 657  *
 658  * Note that this macros defines __per_cpu_load as an absolute symbol.
 659  * If there is no need to put the percpu section at a predetermined
 660  * address, use PERCPU().
 661  */
 662 #define PERCPU_VADDR(vaddr, phdr)                                       \
 663         VMLINUX_SYMBOL(__per_cpu_load) = .;                             \
 664         .data.percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load)          \
 665                                 - LOAD_OFFSET) {                        \
 666                 VMLINUX_SYMBOL(__per_cpu_start) = .;                    \
 667                 *(.data.percpu.first)                                   \
 668                 *(.data.percpu.page_aligned)                            \
 669                 *(.data.percpu)                                         \
 670                 *(.data.percpu.shared_aligned)                          \
 671                 VMLINUX_SYMBOL(__per_cpu_end) = .;                      \
 672         } phdr                                                          \
 673         . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data.percpu);
 674
 675 /**
 676  * PERCPU - define output section for percpu area, simple version
 677  * @align: required alignment
 678  *
 679  * Align to @align and outputs output section for percpu area.  This
 680  * macro doesn't maniuplate @vaddr or @phdr and __per_cpu_load and
 681  * __per_cpu_start will be identical.
 682  *
 683  * This macro is equivalent to ALIGN(align); PERCPU_VADDR( , ) except
 684  * that __per_cpu_load is defined as a relative symbol against
 685  * .data.percpu which is required for relocatable x86_32
 686  * configuration.
 687  */
 688 #define PERCPU(align)                                                   \
 689         . = ALIGN(align);                                               \
 690         .data.percpu    : AT(ADDR(.data.percpu) - LOAD_OFFSET) {        \
 691                 VMLINUX_SYMBOL(__per_cpu_load) = .;                     \
 692                 VMLINUX_SYMBOL(__per_cpu_start) = .;                    \
 693                 *(.data.percpu.first)                                   \
 694                 *(.data.percpu.page_aligned)                            \
 695                 *(.data.percpu)                                         \
 696                 *(.data.percpu.shared_aligned)                          \
 697                 VMLINUX_SYMBOL(__per_cpu_end) = .;                      \
 698         }
 699
 700
 701 /*
 702  * Definition of the high level *_SECTION macros
 703  * They will fit only a subset of the architectures
 704  */
 705
 706
 707 /*
 708  * Writeable data.
 709  * All sections are combined in a single .data section.
 710  * The sections following CONSTRUCTORS are arranged so their
 711  * typical alignment matches.
 712  * A cacheline is typical/always less than a PAGE_SIZE so
 713  * the sections that has this restriction (or similar)
 714  * is located before the ones requiring PAGE_SIZE alignment.
 715  * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
 716  * matches the requirment of PAGE_ALIGNED_DATA.
 717  *
 718  * use 0 as page_align if page_aligned data is not used */
 719 #define RW_DATA_SECTION(cacheline, pagealigned, inittask)               \
 720         . = ALIGN(PAGE_SIZE);                                           \
 721         .data : AT(ADDR(.data) - LOAD_OFFSET) {                         \
 722                 INIT_TASK_DATA(inittask)                                \
 723                 CACHELINE_ALIGNED_DATA(cacheline)                       \
 724                 READ_MOSTLY_DATA(cacheline)                             \
 725                 DATA_DATA                                               \
 726                 CONSTRUCTORS                                            \
 727                 NOSAVE_DATA                                             \
 728                 PAGE_ALIGNED_DATA(pagealigned)                          \
 729         }
 730
 731 #define INIT_TEXT_SECTION(inittext_align)                               \
 732         . = ALIGN(inittext_align);                                      \
 733         .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {               \
 734                 VMLINUX_SYMBOL(_sinittext) = .;                         \
 735                 INIT_TEXT                                               \
 736                 VMLINUX_SYMBOL(_einittext) = .;                         \
 737         }
 738
 739 #define INIT_DATA_SECTION(initsetup_align)                              \
 740         .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {               \
 741                 INIT_DATA                                               \
 742                 INIT_SETUP(initsetup_align)                             \
 743                 INIT_CALLS                                              \
 744                 CON_INITCALL                                            \
 745                 SECURITY_INITCALL                                       \
 746                 INIT_RAM_FS                                             \
 747         }
 748
 749 #define BSS_SECTION(sbss_align, bss_align, stop_align)                  \
 750         . = ALIGN(sbss_align);                                          \
 751         VMLINUX_SYMBOL(__bss_start) = .;                                \
 752         SBSS(sbss_align)                                                \
 753         BSS(bss_align)                                                  \
 754         . = ALIGN(stop_align);                                          \
 755         VMLINUX_SYMBOL(__bss_stop) = .;