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_SECTION(CACHELINE_SIZE)
  19  *      __init_end = .;
  20  *
  21  *      _stext = .;
  22  *      TEXT_SECTION = 0
  23  *      _etext = .;
  24  *
  25  *      _sdata = .;
  26  *      RO_DATA_SECTION(PAGE_SIZE)
  27  *      RW_DATA_SECTION(...)
  28  *      _edata = .;
  29  *
  30  *      EXCEPTION_TABLE(...)
  31  *      NOTES
  32  *
  33  *      BSS_SECTION(0, 0, 0)
  34  *      _end = .;
  35  *
  36  *      STABS_DEBUG
  37  *      DWARF_DEBUG
  38  *
  39  *      DISCARDS                // must be the last
  40  * }
  41  *
  42  * [__init_begin, __init_end] is the init section that may be freed after init
  43  * [_stext, _etext] is the text section
  44  * [_sdata, _edata] is the data section
  45  *
  46  * Some of the included output section have their own set of constants.
  47  * Examples are: [__initramfs_start, __initramfs_end] for initramfs and
  48  *               [__nosave_begin, __nosave_end] for the nosave data
  49  */
  50
  51 #ifndef LOAD_OFFSET
  52 #define LOAD_OFFSET 0
  53 #endif
  54
  55 #include <linux/export.h>
  56
  57 /* Align . to a 8 byte boundary equals to maximum function alignment. */
  58 #define ALIGN_FUNCTION()  . = ALIGN(8)
  59
  60 /*
  61  * Align to a 32 byte boundary equal to the
  62  * alignment gcc 4.5 uses for a struct
  63  */
  64 #define STRUCT_ALIGNMENT 32
  65 #define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT)
  66
  67 /* The actual configuration determine if the init/exit sections
  68  * are handled as text/data or they can be discarded (which
  69  * often happens at runtime)
  70  */
  71 #ifdef CONFIG_HOTPLUG_CPU
  72 #define CPU_KEEP(sec)    *(.cpu##sec)
  73 #define CPU_DISCARD(sec)
  74 #else
  75 #define CPU_KEEP(sec)
  76 #define CPU_DISCARD(sec) *(.cpu##sec)
  77 #endif
  78
  79 #if defined(CONFIG_MEMORY_HOTPLUG)
  80 #define MEM_KEEP(sec)    *(.mem##sec)
  81 #define MEM_DISCARD(sec)
  82 #else
  83 #define MEM_KEEP(sec)
  84 #define MEM_DISCARD(sec) *(.mem##sec)
  85 #endif
  86
  87 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
  88 #define MCOUNT_REC()    . = ALIGN(8);                           \
  89                         VMLINUX_SYMBOL(__start_mcount_loc) = .; \
  90                         *(__mcount_loc)                         \
  91                         VMLINUX_SYMBOL(__stop_mcount_loc) = .;
  92 #else
  93 #define MCOUNT_REC()
  94 #endif
  95
  96 #ifdef CONFIG_TRACE_BRANCH_PROFILING
  97 #define LIKELY_PROFILE()        VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \
  98                                 *(_ftrace_annotated_branch)                           \
  99                                 VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .;
 100 #else
 101 #define LIKELY_PROFILE()
 102 #endif
 103
 104 #ifdef CONFIG_PROFILE_ALL_BRANCHES
 105 #define BRANCH_PROFILE()        VMLINUX_SYMBOL(__start_branch_profile) = .;   \
 106                                 *(_ftrace_branch)                             \
 107                                 VMLINUX_SYMBOL(__stop_branch_profile) = .;
 108 #else
 109 #define BRANCH_PROFILE()
 110 #endif
 111
 112 #ifdef CONFIG_EVENT_TRACING
 113 #define FTRACE_EVENTS() . = ALIGN(8);                                   \
 114                         VMLINUX_SYMBOL(__start_ftrace_events) = .;      \
 115                         *(_ftrace_events)                               \
 116                         VMLINUX_SYMBOL(__stop_ftrace_events) = .;
 117 #else
 118 #define FTRACE_EVENTS()
 119 #endif
 120
 121 #ifdef CONFIG_TRACING
 122 #define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .;      \
 123                          *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \
 124                          VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .;
 125 #else
 126 #define TRACE_PRINTKS()
 127 #endif
 128
 129 #ifdef CONFIG_FTRACE_SYSCALLS
 130 #define TRACE_SYSCALLS() . = ALIGN(8);                                  \
 131                          VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \
 132                          *(__syscalls_metadata)                         \
 133                          VMLINUX_SYMBOL(__stop_syscalls_metadata) = .;
 134 #else
 135 #define TRACE_SYSCALLS()
 136 #endif
 137
 138 #ifdef CONFIG_CLKSRC_OF
 139 #define CLKSRC_OF_TABLES() . = ALIGN(8);                                \
 140                            VMLINUX_SYMBOL(__clksrc_of_table) = .;       \
 141                            *(__clksrc_of_table)                         \
 142                            *(__clksrc_of_table_end)
 143 #else
 144 #define CLKSRC_OF_TABLES()
 145 #endif
 146
 147 #ifdef CONFIG_IRQCHIP
 148 #define IRQCHIP_OF_MATCH_TABLE()                                        \
 149         . = ALIGN(8);                                                   \
 150         VMLINUX_SYMBOL(__irqchip_begin) = .;                            \
 151         *(__irqchip_of_table)                                           \
 152         *(__irqchip_of_end)
 153 #else
 154 #define IRQCHIP_OF_MATCH_TABLE()
 155 #endif
 156
 157 #ifdef CONFIG_COMMON_CLK
 158 #define CLK_OF_TABLES() . = ALIGN(8);                           \
 159                         VMLINUX_SYMBOL(__clk_of_table) = .;     \
 160                         *(__clk_of_table)                       \
 161                         *(__clk_of_table_end)
 162 #else
 163 #define CLK_OF_TABLES()
 164 #endif
 165
 166 #define KERNEL_DTB()                                                    \
 167         STRUCT_ALIGN();                                                 \
 168         VMLINUX_SYMBOL(__dtb_start) = .;                                \
 169         *(.dtb.init.rodata)                                             \
 170         VMLINUX_SYMBOL(__dtb_end) = .;
 171
 172 /* .data section */
 173 #define DATA_DATA                                                       \
 174         *(.data)                                                        \
 175         *(.ref.data)                                                    \
 176         *(.data..shared_aligned) /* percpu related */                   \
 177         CPU_KEEP(init.data)                                             \
 178         CPU_KEEP(exit.data)                                             \
 179         MEM_KEEP(init.data)                                             \
 180         MEM_KEEP(exit.data)                                             \
 181         *(.data.unlikely)                                               \
 182         STRUCT_ALIGN();                                                 \
 183         *(__tracepoints)                                                \
 184         /* implement dynamic printk debug */                            \
 185         . = ALIGN(8);                                                   \
 186         VMLINUX_SYMBOL(__start___jump_table) = .;                       \
 187         *(__jump_table)                                                 \
 188         VMLINUX_SYMBOL(__stop___jump_table) = .;                        \
 189         . = ALIGN(8);                                                   \
 190         VMLINUX_SYMBOL(__start___verbose) = .;                          \
 191         *(__verbose)                                                    \
 192         VMLINUX_SYMBOL(__stop___verbose) = .;                           \
 193         LIKELY_PROFILE()                                                \
 194         BRANCH_PROFILE()                                                \
 195         TRACE_PRINTKS()
 196
 197 /*
 198  * Data section helpers
 199  */
 200 #define NOSAVE_DATA                                                     \
 201         . = ALIGN(PAGE_SIZE);                                           \
 202         VMLINUX_SYMBOL(__nosave_begin) = .;                             \
 203         *(.data..nosave)                                                \
 204         . = ALIGN(PAGE_SIZE);                                           \
 205         VMLINUX_SYMBOL(__nosave_end) = .;
 206
 207 #define PAGE_ALIGNED_DATA(page_align)                                   \
 208         . = ALIGN(page_align);                                          \
 209         *(.data..page_aligned)
 210
 211 #define READ_MOSTLY_DATA(align)                                         \
 212         . = ALIGN(align);                                               \
 213         *(.data..read_mostly)                                           \
 214         . = ALIGN(align);
 215
 216 #define CACHELINE_ALIGNED_DATA(align)                                   \
 217         . = ALIGN(align);                                               \
 218         *(.data..cacheline_aligned)
 219
 220 #define INIT_TASK_DATA(align)                                           \
 221         . = ALIGN(align);                                               \
 222         *(.data..init_task)
 223
 224 /*
 225  * Read only Data
 226  */
 227 #define RO_DATA_SECTION(align)                                          \
 228         . = ALIGN((align));                                             \
 229         .rodata           : AT(ADDR(.rodata) - LOAD_OFFSET) {           \
 230                 VMLINUX_SYMBOL(__start_rodata) = .;                     \
 231                 *(.rodata) *(.rodata.*)                                 \
 232                 *(__vermagic)           /* Kernel version magic */      \
 233                 . = ALIGN(8);                                           \
 234                 VMLINUX_SYMBOL(__start___tracepoints_ptrs) = .;         \
 235                 *(__tracepoints_ptrs)   /* Tracepoints: pointer array */\
 236                 VMLINUX_SYMBOL(__stop___tracepoints_ptrs) = .;          \
 237                 *(__tracepoints_strings)/* Tracepoints: strings */      \
 238         }                                                               \
 239                                                                         \
 240         .rodata1          : AT(ADDR(.rodata1) - LOAD_OFFSET) {          \
 241                 *(.rodata1)                                             \
 242         }                                                               \
 243                                                                         \
 244         BUG_TABLE                                                       \
 245                                                                         \
 246         /* PCI quirks */                                                \
 247         .pci_fixup        : AT(ADDR(.pci_fixup) - LOAD_OFFSET) {        \
 248                 VMLINUX_SYMBOL(__start_pci_fixups_early) = .;           \
 249                 *(.pci_fixup_early)                                     \
 250                 VMLINUX_SYMBOL(__end_pci_fixups_early) = .;             \
 251                 VMLINUX_SYMBOL(__start_pci_fixups_header) = .;          \
 252                 *(.pci_fixup_header)                                    \
 253                 VMLINUX_SYMBOL(__end_pci_fixups_header) = .;            \
 254                 VMLINUX_SYMBOL(__start_pci_fixups_final) = .;           \
 255                 *(.pci_fixup_final)                                     \
 256                 VMLINUX_SYMBOL(__end_pci_fixups_final) = .;             \
 257                 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .;          \
 258                 *(.pci_fixup_enable)                                    \
 259                 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .;            \
 260                 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .;          \
 261                 *(.pci_fixup_resume)                                    \
 262                 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .;            \
 263                 VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .;    \
 264                 *(.pci_fixup_resume_early)                              \
 265                 VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .;      \
 266                 VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .;         \
 267                 *(.pci_fixup_suspend)                                   \
 268                 VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .;           \
 269         }                                                               \
 270                                                                         \
 271         /* Built-in firmware blobs */                                   \
 272         .builtin_fw        : AT(ADDR(.builtin_fw) - LOAD_OFFSET) {      \
 273                 VMLINUX_SYMBOL(__start_builtin_fw) = .;                 \
 274                 *(.builtin_fw)                                          \
 275                 VMLINUX_SYMBOL(__end_builtin_fw) = .;                   \
 276         }                                                               \
 277                                                                         \
 278         /* RapidIO route ops */                                         \
 279         .rio_ops        : AT(ADDR(.rio_ops) - LOAD_OFFSET) {            \
 280                 VMLINUX_SYMBOL(__start_rio_switch_ops) = .;             \
 281                 *(.rio_switch_ops)                                      \
 282                 VMLINUX_SYMBOL(__end_rio_switch_ops) = .;               \
 283         }                                                               \
 284                                                                         \
 285         TRACEDATA                                                       \
 286                                                                         \
 287         /* Kernel symbol table: Normal symbols */                       \
 288         __ksymtab         : AT(ADDR(__ksymtab) - LOAD_OFFSET) {         \
 289                 VMLINUX_SYMBOL(__start___ksymtab) = .;                  \
 290                 *(SORT(___ksymtab+*))                                   \
 291                 VMLINUX_SYMBOL(__stop___ksymtab) = .;                   \
 292         }                                                               \
 293                                                                         \
 294         /* Kernel symbol table: GPL-only symbols */                     \
 295         __ksymtab_gpl     : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) {     \
 296                 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .;              \
 297                 *(SORT(___ksymtab_gpl+*))                               \
 298                 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .;               \
 299         }                                                               \
 300                                                                         \
 301         /* Kernel symbol table: Normal unused symbols */                \
 302         __ksymtab_unused  : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) {  \
 303                 VMLINUX_SYMBOL(__start___ksymtab_unused) = .;           \
 304                 *(SORT(___ksymtab_unused+*))                            \
 305                 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .;            \
 306         }                                                               \
 307                                                                         \
 308         /* Kernel symbol table: GPL-only unused symbols */              \
 309         __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
 310                 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .;       \
 311                 *(SORT(___ksymtab_unused_gpl+*))                        \
 312                 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .;        \
 313         }                                                               \
 314                                                                         \
 315         /* Kernel symbol table: GPL-future-only symbols */              \
 316         __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
 317                 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .;       \
 318                 *(SORT(___ksymtab_gpl_future+*))                        \
 319                 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .;        \
 320         }                                                               \
 321                                                                         \
 322         /* Kernel symbol table: Normal symbols */                       \
 323         __kcrctab         : AT(ADDR(__kcrctab) - LOAD_OFFSET) {         \
 324                 VMLINUX_SYMBOL(__start___kcrctab) = .;                  \
 325                 *(SORT(___kcrctab+*))                                   \
 326                 VMLINUX_SYMBOL(__stop___kcrctab) = .;                   \
 327         }                                                               \
 328                                                                         \
 329         /* Kernel symbol table: GPL-only symbols */                     \
 330         __kcrctab_gpl     : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) {     \
 331                 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .;              \
 332                 *(SORT(___kcrctab_gpl+*))                               \
 333                 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .;               \
 334         }                                                               \
 335                                                                         \
 336         /* Kernel symbol table: Normal unused symbols */                \
 337         __kcrctab_unused  : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) {  \
 338                 VMLINUX_SYMBOL(__start___kcrctab_unused) = .;           \
 339                 *(SORT(___kcrctab_unused+*))                            \
 340                 VMLINUX_SYMBOL(__stop___kcrctab_unused) = .;            \
 341         }                                                               \
 342                                                                         \
 343         /* Kernel symbol table: GPL-only unused symbols */              \
 344         __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
 345                 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .;       \
 346                 *(SORT(___kcrctab_unused_gpl+*))                        \
 347                 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .;        \
 348         }                                                               \
 349                                                                         \
 350         /* Kernel symbol table: GPL-future-only symbols */              \
 351         __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
 352                 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .;       \
 353                 *(SORT(___kcrctab_gpl_future+*))                        \
 354                 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .;        \
 355         }                                                               \
 356                                                                         \
 357         /* Kernel symbol table: strings */                              \
 358         __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
 359                 *(__ksymtab_strings)                                    \
 360         }                                                               \
 361                                                                         \
 362         /* __*init sections */                                          \
 363         __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) {         \
 364                 *(.ref.rodata)                                          \
 365                 CPU_KEEP(init.rodata)                                   \
 366                 CPU_KEEP(exit.rodata)                                   \
 367                 MEM_KEEP(init.rodata)                                   \
 368                 MEM_KEEP(exit.rodata)                                   \
 369         }                                                               \
 370                                                                         \
 371         /* Built-in module parameters. */                               \
 372         __param : AT(ADDR(__param) - LOAD_OFFSET) {                     \
 373                 VMLINUX_SYMBOL(__start___param) = .;                    \
 374                 *(__param)                                              \
 375                 VMLINUX_SYMBOL(__stop___param) = .;                     \
 376         }                                                               \
 377                                                                         \
 378         /* Built-in module versions. */                                 \
 379         __modver : AT(ADDR(__modver) - LOAD_OFFSET) {                   \
 380                 VMLINUX_SYMBOL(__start___modver) = .;                   \
 381                 *(__modver)                                             \
 382                 VMLINUX_SYMBOL(__stop___modver) = .;                    \
 383                 . = ALIGN((align));                                     \
 384                 VMLINUX_SYMBOL(__end_rodata) = .;                       \
 385         }                                                               \
 386         . = ALIGN((align));
 387
 388 /* RODATA & RO_DATA provided for backward compatibility.
 389  * All archs are supposed to use RO_DATA() */
 390 #define RODATA          RO_DATA_SECTION(4096)
 391 #define RO_DATA(align)  RO_DATA_SECTION(align)
 392
 393 #define SECURITY_INIT                                                   \
 394         .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
 395                 VMLINUX_SYMBOL(__security_initcall_start) = .;          \
 396                 *(.security_initcall.init)                              \
 397                 VMLINUX_SYMBOL(__security_initcall_end) = .;            \
 398         }
 399
 400 /* .text section. Map to function alignment to avoid address changes
 401  * during second ld run in second ld pass when generating System.map */
 402 #define TEXT_TEXT                                                       \
 403                 ALIGN_FUNCTION();                                       \
 404                 *(.text.hot)                                            \
 405                 *(.text)                                                \
 406                 *(.ref.text)                                            \
 407         CPU_KEEP(init.text)                                             \
 408         CPU_KEEP(exit.text)                                             \
 409         MEM_KEEP(init.text)                                             \
 410         MEM_KEEP(exit.text)                                             \
 411                 *(.text.unlikely)
 412
 413
 414 /* sched.text is aling to function alignment to secure we have same
 415  * address even at second ld pass when generating System.map */
 416 #define SCHED_TEXT                                                      \
 417                 ALIGN_FUNCTION();                                       \
 418                 VMLINUX_SYMBOL(__sched_text_start) = .;                 \
 419                 *(.sched.text)                                          \
 420                 VMLINUX_SYMBOL(__sched_text_end) = .;
 421
 422 /* spinlock.text is aling to function alignment to secure we have same
 423  * address even at second ld pass when generating System.map */
 424 #define LOCK_TEXT                                                       \
 425                 ALIGN_FUNCTION();                                       \
 426                 VMLINUX_SYMBOL(__lock_text_start) = .;                  \
 427                 *(.spinlock.text)                                       \
 428                 VMLINUX_SYMBOL(__lock_text_end) = .;
 429
 430 #define KPROBES_TEXT                                                    \
 431                 ALIGN_FUNCTION();                                       \
 432                 VMLINUX_SYMBOL(__kprobes_text_start) = .;               \
 433                 *(.kprobes.text)                                        \
 434                 VMLINUX_SYMBOL(__kprobes_text_end) = .;
 435
 436 #define ENTRY_TEXT                                                      \
 437                 ALIGN_FUNCTION();                                       \
 438                 VMLINUX_SYMBOL(__entry_text_start) = .;                 \
 439                 *(.entry.text)                                          \
 440                 VMLINUX_SYMBOL(__entry_text_end) = .;
 441
 442 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
 443 #define IRQENTRY_TEXT                                                   \
 444                 ALIGN_FUNCTION();                                       \
 445                 VMLINUX_SYMBOL(__irqentry_text_start) = .;              \
 446                 *(.irqentry.text)                                       \
 447                 VMLINUX_SYMBOL(__irqentry_text_end) = .;
 448 #else
 449 #define IRQENTRY_TEXT
 450 #endif
 451
 452 /* Section used for early init (in .S files) */
 453 #define HEAD_TEXT  *(.head.text)
 454
 455 #define HEAD_TEXT_SECTION                                                       \
 456         .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) {               \
 457                 HEAD_TEXT                                               \
 458         }
 459
 460 /*
 461  * Exception table
 462  */
 463 #define EXCEPTION_TABLE(align)                                          \
 464         . = ALIGN(align);                                               \
 465         __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {               \
 466                 VMLINUX_SYMBOL(__start___ex_table) = .;                 \
 467                 *(__ex_table)                                           \
 468                 VMLINUX_SYMBOL(__stop___ex_table) = .;                  \
 469         }
 470
 471 /*
 472  * Init task
 473  */
 474 #define INIT_TASK_DATA_SECTION(align)                                   \
 475         . = ALIGN(align);                                               \
 476         .data..init_task :  AT(ADDR(.data..init_task) - LOAD_OFFSET) {  \
 477                 INIT_TASK_DATA(align)                                   \
 478         }
 479
 480 #ifdef CONFIG_CONSTRUCTORS
 481 #define KERNEL_CTORS()  . = ALIGN(8);                      \
 482                         VMLINUX_SYMBOL(__ctors_start) = .; \
 483                         *(.ctors)                          \
 484                         VMLINUX_SYMBOL(__ctors_end) = .;
 485 #else
 486 #define KERNEL_CTORS()
 487 #endif
 488
 489 /* init and exit section handling */
 490 #define INIT_DATA                                                       \
 491         *(.init.data)                                                   \
 492         CPU_DISCARD(init.data)                                          \
 493         MEM_DISCARD(init.data)                                          \
 494         KERNEL_CTORS()                                                  \
 495         MCOUNT_REC()                                                    \
 496         *(.init.rodata)                                                 \
 497         FTRACE_EVENTS()                                                 \
 498         TRACE_SYSCALLS()                                                \
 499         CPU_DISCARD(init.rodata)                                        \
 500         MEM_DISCARD(init.rodata)                                        \
 501         CLK_OF_TABLES()                                                 \
 502         CLKSRC_OF_TABLES()                                              \
 503         KERNEL_DTB()                                                    \
 504         IRQCHIP_OF_MATCH_TABLE()
 505
 506 #define INIT_TEXT                                                       \
 507         *(.init.text)                                                   \
 508         CPU_DISCARD(init.text)                                          \
 509         MEM_DISCARD(init.text)
 510
 511 #define EXIT_DATA                                                       \
 512         *(.exit.data)                                                   \
 513         CPU_DISCARD(exit.data)                                          \
 514         CPU_DISCARD(exit.rodata)                                        \
 515         MEM_DISCARD(exit.data)                                          \
 516         MEM_DISCARD(exit.rodata)
 517
 518 #define EXIT_TEXT                                                       \
 519         *(.exit.text)                                                   \
 520         CPU_DISCARD(exit.text)                                          \
 521         MEM_DISCARD(exit.text)
 522
 523 #define EXIT_CALL                                                       \
 524         *(.exitcall.exit)
 525
 526 /*
 527  * bss (Block Started by Symbol) - uninitialized data
 528  * zeroed during startup
 529  */
 530 #define SBSS(sbss_align)                                                \
 531         . = ALIGN(sbss_align);                                          \
 532         .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) {                         \
 533                 *(.sbss)                                                \
 534                 *(.scommon)                                             \
 535         }
 536
 537 /*
 538  * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra
 539  * sections to the front of bss.
 540  */
 541 #ifndef BSS_FIRST_SECTIONS
 542 #define BSS_FIRST_SECTIONS
 543 #endif
 544
 545 #define BSS(bss_align)                                                  \
 546         . = ALIGN(bss_align);                                           \
 547         .bss : AT(ADDR(.bss) - LOAD_OFFSET) {                           \
 548                 BSS_FIRST_SECTIONS                                      \
 549                 *(.bss..page_aligned)                                   \
 550                 *(.dynbss)                                              \
 551                 *(.bss)                                                 \
 552                 *(COMMON)                                               \
 553         }
 554
 555 /*
 556  * DWARF debug sections.
 557  * Symbols in the DWARF debugging sections are relative to
 558  * the beginning of the section so we begin them at 0.
 559  */
 560 #define DWARF_DEBUG                                                     \
 561                 /* DWARF 1 */                                           \
 562                 .debug          0 : { *(.debug) }                       \
 563                 .line           0 : { *(.line) }                        \
 564                 /* GNU DWARF 1 extensions */                            \
 565                 .debug_srcinfo  0 : { *(.debug_srcinfo) }               \
 566                 .debug_sfnames  0 : { *(.debug_sfnames) }               \
 567                 /* DWARF 1.1 and DWARF 2 */                             \
 568                 .debug_aranges  0 : { *(.debug_aranges) }               \
 569                 .debug_pubnames 0 : { *(.debug_pubnames) }              \
 570                 /* DWARF 2 */                                           \
 571                 .debug_info     0 : { *(.debug_info                     \
 572                                 .gnu.linkonce.wi.*) }                   \
 573                 .debug_abbrev   0 : { *(.debug_abbrev) }                \
 574                 .debug_line     0 : { *(.debug_line) }                  \
 575                 .debug_frame    0 : { *(.debug_frame) }                 \
 576                 .debug_str      0 : { *(.debug_str) }                   \
 577                 .debug_loc      0 : { *(.debug_loc) }                   \
 578                 .debug_macinfo  0 : { *(.debug_macinfo) }               \
 579                 /* SGI/MIPS DWARF 2 extensions */                       \
 580                 .debug_weaknames 0 : { *(.debug_weaknames) }            \
 581                 .debug_funcnames 0 : { *(.debug_funcnames) }            \
 582                 .debug_typenames 0 : { *(.debug_typenames) }            \
 583                 .debug_varnames  0 : { *(.debug_varnames) }             \
 584
 585                 /* Stabs debugging sections.  */
 586 #define STABS_DEBUG                                                     \
 587                 .stab 0 : { *(.stab) }                                  \
 588                 .stabstr 0 : { *(.stabstr) }                            \
 589                 .stab.excl 0 : { *(.stab.excl) }                        \
 590                 .stab.exclstr 0 : { *(.stab.exclstr) }                  \
 591                 .stab.index 0 : { *(.stab.index) }                      \
 592                 .stab.indexstr 0 : { *(.stab.indexstr) }                \
 593                 .comment 0 : { *(.comment) }
 594
 595 #ifdef CONFIG_GENERIC_BUG
 596 #define BUG_TABLE                                                       \
 597         . = ALIGN(8);                                                   \
 598         __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) {             \
 599                 VMLINUX_SYMBOL(__start___bug_table) = .;                \
 600                 *(__bug_table)                                          \
 601                 VMLINUX_SYMBOL(__stop___bug_table) = .;                 \
 602         }
 603 #else
 604 #define BUG_TABLE
 605 #endif
 606
 607 #ifdef CONFIG_PM_TRACE
 608 #define TRACEDATA                                                       \
 609         . = ALIGN(4);                                                   \
 610         .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) {               \
 611                 VMLINUX_SYMBOL(__tracedata_start) = .;                  \
 612                 *(.tracedata)                                           \
 613                 VMLINUX_SYMBOL(__tracedata_end) = .;                    \
 614         }
 615 #else
 616 #define TRACEDATA
 617 #endif
 618
 619 #define NOTES                                                           \
 620         .notes : AT(ADDR(.notes) - LOAD_OFFSET) {                       \
 621                 VMLINUX_SYMBOL(__start_notes) = .;                      \
 622                 *(.note.*)                                              \
 623                 VMLINUX_SYMBOL(__stop_notes) = .;                       \
 624         }
 625
 626 #define INIT_SETUP(initsetup_align)                                     \
 627                 . = ALIGN(initsetup_align);                             \
 628                 VMLINUX_SYMBOL(__setup_start) = .;                      \
 629                 *(.init.setup)                                          \
 630                 VMLINUX_SYMBOL(__setup_end) = .;
 631
 632 #define INIT_CALLS_LEVEL(level)                                         \
 633                 VMLINUX_SYMBOL(__initcall##level##_start) = .;          \
 634                 *(.initcall##level##.init)                              \
 635                 *(.initcall##level##s.init)                             \
 636
 637 #define INIT_CALLS                                                      \
 638                 VMLINUX_SYMBOL(__initcall_start) = .;                   \
 639                 *(.initcallearly.init)                                  \
 640                 INIT_CALLS_LEVEL(0)                                     \
 641                 INIT_CALLS_LEVEL(1)                                     \
 642                 INIT_CALLS_LEVEL(2)                                     \
 643                 INIT_CALLS_LEVEL(3)                                     \
 644                 INIT_CALLS_LEVEL(4)                                     \
 645                 INIT_CALLS_LEVEL(5)                                     \
 646                 INIT_CALLS_LEVEL(rootfs)                                \
 647                 INIT_CALLS_LEVEL(6)                                     \
 648                 INIT_CALLS_LEVEL(7)                                     \
 649                 VMLINUX_SYMBOL(__initcall_end) = .;
 650
 651 #define CON_INITCALL                                                    \
 652                 VMLINUX_SYMBOL(__con_initcall_start) = .;               \
 653                 *(.con_initcall.init)                                   \
 654                 VMLINUX_SYMBOL(__con_initcall_end) = .;
 655
 656 #define SECURITY_INITCALL                                               \
 657                 VMLINUX_SYMBOL(__security_initcall_start) = .;          \
 658                 *(.security_initcall.init)                              \
 659                 VMLINUX_SYMBOL(__security_initcall_end) = .;
 660
 661 #ifdef CONFIG_BLK_DEV_INITRD
 662 #define INIT_RAM_FS                                                     \
 663         . = ALIGN(4);                                                   \
 664         VMLINUX_SYMBOL(__initramfs_start) = .;                          \
 665         *(.init.ramfs)                                                  \
 666         . = ALIGN(8);                                                   \
 667         *(.init.ramfs.info)
 668 #else
 669 #define INIT_RAM_FS
 670 #endif
 671
 672 /*
 673  * Default discarded sections.
 674  *
 675  * Some archs want to discard exit text/data at runtime rather than
 676  * link time due to cross-section references such as alt instructions,
 677  * bug table, eh_frame, etc.  DISCARDS must be the last of output
 678  * section definitions so that such archs put those in earlier section
 679  * definitions.
 680  */
 681 #define DISCARDS                                                        \
 682         /DISCARD/ : {                                                   \
 683         EXIT_TEXT                                                       \
 684         EXIT_DATA                                                       \
 685         EXIT_CALL                                                       \
 686         *(.discard)                                                     \
 687         *(.discard.*)                                                   \
 688         }
 689
 690 /**
 691  * PERCPU_INPUT - the percpu input sections
 692  * @cacheline: cacheline size
 693  *
 694  * The core percpu section names and core symbols which do not rely
 695  * directly upon load addresses.
 696  *
 697  * @cacheline is used to align subsections to avoid false cacheline
 698  * sharing between subsections for different purposes.
 699  */
 700 #define PERCPU_INPUT(cacheline)                                         \
 701         VMLINUX_SYMBOL(__per_cpu_start) = .;                            \
 702         *(.data..percpu..first)                                         \
 703         . = ALIGN(PAGE_SIZE);                                           \
 704         *(.data..percpu..page_aligned)                                  \
 705         . = ALIGN(cacheline);                                           \
 706         *(.data..percpu..readmostly)                                    \
 707         . = ALIGN(cacheline);                                           \
 708         *(.data..percpu)                                                \
 709         *(.data..percpu..shared_aligned)                                \
 710         VMLINUX_SYMBOL(__per_cpu_end) = .;
 711
 712 /**
 713  * PERCPU_VADDR - define output section for percpu area
 714  * @cacheline: cacheline size
 715  * @vaddr: explicit base address (optional)
 716  * @phdr: destination PHDR (optional)
 717  *
 718  * Macro which expands to output section for percpu area.
 719  *
 720  * @cacheline is used to align subsections to avoid false cacheline
 721  * sharing between subsections for different purposes.
 722  *
 723  * If @vaddr is not blank, it specifies explicit base address and all
 724  * percpu symbols will be offset from the given address.  If blank,
 725  * @vaddr always equals @laddr + LOAD_OFFSET.
 726  *
 727  * @phdr defines the output PHDR to use if not blank.  Be warned that
 728  * output PHDR is sticky.  If @phdr is specified, the next output
 729  * section in the linker script will go there too.  @phdr should have
 730  * a leading colon.
 731  *
 732  * Note that this macros defines __per_cpu_load as an absolute symbol.
 733  * If there is no need to put the percpu section at a predetermined
 734  * address, use PERCPU_SECTION.
 735  */
 736 #define PERCPU_VADDR(cacheline, vaddr, phdr)                            \
 737         VMLINUX_SYMBOL(__per_cpu_load) = .;                             \
 738         .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load)         \
 739                                 - LOAD_OFFSET) {                        \
 740                 PERCPU_INPUT(cacheline)                                 \
 741         } phdr                                                          \
 742         . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu);
 743
 744 /**
 745  * PERCPU_SECTION - define output section for percpu area, simple version
 746  * @cacheline: cacheline size
 747  *
 748  * Align to PAGE_SIZE and outputs output section for percpu area.  This
 749  * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and
 750  * __per_cpu_start will be identical.
 751  *
 752  * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,)
 753  * except that __per_cpu_load is defined as a relative symbol against
 754  * .data..percpu which is required for relocatable x86_32 configuration.
 755  */
 756 #define PERCPU_SECTION(cacheline)                                       \
 757         . = ALIGN(PAGE_SIZE);                                           \
 758         .data..percpu   : AT(ADDR(.data..percpu) - LOAD_OFFSET) {       \
 759                 VMLINUX_SYMBOL(__per_cpu_load) = .;                     \
 760                 PERCPU_INPUT(cacheline)                                 \
 761         }
 762
 763
 764 /*
 765  * Definition of the high level *_SECTION macros
 766  * They will fit only a subset of the architectures
 767  */
 768
 769
 770 /*
 771  * Writeable data.
 772  * All sections are combined in a single .data section.
 773  * The sections following CONSTRUCTORS are arranged so their
 774  * typical alignment matches.
 775  * A cacheline is typical/always less than a PAGE_SIZE so
 776  * the sections that has this restriction (or similar)
 777  * is located before the ones requiring PAGE_SIZE alignment.
 778  * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
 779  * matches the requirement of PAGE_ALIGNED_DATA.
 780  *
 781  * use 0 as page_align if page_aligned data is not used */
 782 #define RW_DATA_SECTION(cacheline, pagealigned, inittask)               \
 783         . = ALIGN(PAGE_SIZE);                                           \
 784         .data : AT(ADDR(.data) - LOAD_OFFSET) {                         \
 785                 INIT_TASK_DATA(inittask)                                \
 786                 NOSAVE_DATA                                             \
 787                 PAGE_ALIGNED_DATA(pagealigned)                          \
 788                 CACHELINE_ALIGNED_DATA(cacheline)                       \
 789                 READ_MOSTLY_DATA(cacheline)                             \
 790                 DATA_DATA                                               \
 791                 CONSTRUCTORS                                            \
 792         }
 793
 794 #define INIT_TEXT_SECTION(inittext_align)                               \
 795         . = ALIGN(inittext_align);                                      \
 796         .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {               \
 797                 VMLINUX_SYMBOL(_sinittext) = .;                         \
 798                 INIT_TEXT                                               \
 799                 VMLINUX_SYMBOL(_einittext) = .;                         \
 800         }
 801
 802 #define INIT_DATA_SECTION(initsetup_align)                              \
 803         .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {               \
 804                 INIT_DATA                                               \
 805                 INIT_SETUP(initsetup_align)                             \
 806                 INIT_CALLS                                              \
 807                 CON_INITCALL                                            \
 808                 SECURITY_INITCALL                                       \
 809                 INIT_RAM_FS                                             \
 810         }
 811
 812 #define BSS_SECTION(sbss_align, bss_align, stop_align)                  \
 813         . = ALIGN(sbss_align);                                          \
 814         VMLINUX_SYMBOL(__bss_start) = .;                                \
 815         SBSS(sbss_align)                                                \
 816         BSS(bss_align)                                                  \
 817         . = ALIGN(stop_align);                                          \
 818         VMLINUX_SYMBOL(__bss_stop) = .;