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 #define TRACEPOINT_STR() VMLINUX_SYMBOL(__start___tracepoint_str) = .;  \
 126                          *(__tracepoint_str) /* Trace_printk fmt' pointer */ \
 127                          VMLINUX_SYMBOL(__stop___tracepoint_str) = .;
 128 #else
 129 #define TRACE_PRINTKS()
 130 #define TRACEPOINT_STR()
 131 #endif
 132
 133 #ifdef CONFIG_FTRACE_SYSCALLS
 134 #define TRACE_SYSCALLS() . = ALIGN(8);                                  \
 135                          VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \
 136                          *(__syscalls_metadata)                         \
 137                          VMLINUX_SYMBOL(__stop_syscalls_metadata) = .;
 138 #else
 139 #define TRACE_SYSCALLS()
 140 #endif
 141
 142
 143 #define ___OF_TABLE(cfg, name)  _OF_TABLE_##cfg(name)
 144 #define __OF_TABLE(cfg, name)   ___OF_TABLE(cfg, name)
 145 #define OF_TABLE(cfg, name)     __OF_TABLE(config_enabled(cfg), name)
 146 #define _OF_TABLE_0(name)
 147 #define _OF_TABLE_1(name)                                               \
 148         . = ALIGN(8);                                                   \
 149         VMLINUX_SYMBOL(__##name##_of_table) = .;                        \
 150         *(__##name##_of_table)                                          \
 151         *(__##name##_of_table_end)
 152
 153 #define CLKSRC_OF_TABLES()      OF_TABLE(CONFIG_CLKSRC_OF, clksrc)
 154 #define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip)
 155 #define CLK_OF_TABLES()         OF_TABLE(CONFIG_COMMON_CLK, clk)
 156 #define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem)
 157 #define CPU_METHOD_OF_TABLES()  OF_TABLE(CONFIG_SMP, cpu_method)
 158 #define EARLYCON_OF_TABLES()    OF_TABLE(CONFIG_SERIAL_EARLYCON, earlycon)
 159
 160 #define KERNEL_DTB()                                                    \
 161         STRUCT_ALIGN();                                                 \
 162         VMLINUX_SYMBOL(__dtb_start) = .;                                \
 163         *(.dtb.init.rodata)                                             \
 164         VMLINUX_SYMBOL(__dtb_end) = .;
 165
 166 /* .data section */
 167 #define DATA_DATA                                                       \
 168         *(.data)                                                        \
 169         *(.ref.data)                                                    \
 170         *(.data..shared_aligned) /* percpu related */                   \
 171         MEM_KEEP(init.data)                                             \
 172         MEM_KEEP(exit.data)                                             \
 173         *(.data.unlikely)                                               \
 174         STRUCT_ALIGN();                                                 \
 175         *(__tracepoints)                                                \
 176         /* implement dynamic printk debug */                            \
 177         . = ALIGN(8);                                                   \
 178         VMLINUX_SYMBOL(__start___jump_table) = .;                       \
 179         *(__jump_table)                                                 \
 180         VMLINUX_SYMBOL(__stop___jump_table) = .;                        \
 181         . = ALIGN(8);                                                   \
 182         VMLINUX_SYMBOL(__start___verbose) = .;                          \
 183         *(__verbose)                                                    \
 184         VMLINUX_SYMBOL(__stop___verbose) = .;                           \
 185         LIKELY_PROFILE()                                                \
 186         BRANCH_PROFILE()                                                \
 187         TRACE_PRINTKS()                                                 \
 188         TRACEPOINT_STR()
 189
 190 /*
 191  * Data section helpers
 192  */
 193 #define NOSAVE_DATA                                                     \
 194         . = ALIGN(PAGE_SIZE);                                           \
 195         VMLINUX_SYMBOL(__nosave_begin) = .;                             \
 196         *(.data..nosave)                                                \
 197         . = ALIGN(PAGE_SIZE);                                           \
 198         VMLINUX_SYMBOL(__nosave_end) = .;
 199
 200 #define PAGE_ALIGNED_DATA(page_align)                                   \
 201         . = ALIGN(page_align);                                          \
 202         *(.data..page_aligned)
 203
 204 #define READ_MOSTLY_DATA(align)                                         \
 205         . = ALIGN(align);                                               \
 206         *(.data..read_mostly)                                           \
 207         . = ALIGN(align);
 208
 209 #define CACHELINE_ALIGNED_DATA(align)                                   \
 210         . = ALIGN(align);                                               \
 211         *(.data..cacheline_aligned)
 212
 213 #define INIT_TASK_DATA(align)                                           \
 214         . = ALIGN(align);                                               \
 215         *(.data..init_task)
 216
 217 /*
 218  * Read only Data
 219  */
 220 #define RO_DATA_SECTION(align)                                          \
 221         . = ALIGN((align));                                             \
 222         .rodata           : AT(ADDR(.rodata) - LOAD_OFFSET) {           \
 223                 VMLINUX_SYMBOL(__start_rodata) = .;                     \
 224                 *(.rodata) *(.rodata.*)                                 \
 225                 *(__vermagic)           /* Kernel version magic */      \
 226                 . = ALIGN(8);                                           \
 227                 VMLINUX_SYMBOL(__start___tracepoints_ptrs) = .;         \
 228                 *(__tracepoints_ptrs)   /* Tracepoints: pointer array */\
 229                 VMLINUX_SYMBOL(__stop___tracepoints_ptrs) = .;          \
 230                 *(__tracepoints_strings)/* Tracepoints: strings */      \
 231         }                                                               \
 232                                                                         \
 233         .rodata1          : AT(ADDR(.rodata1) - LOAD_OFFSET) {          \
 234                 *(.rodata1)                                             \
 235         }                                                               \
 236                                                                         \
 237         BUG_TABLE                                                       \
 238                                                                         \
 239         /* PCI quirks */                                                \
 240         .pci_fixup        : AT(ADDR(.pci_fixup) - LOAD_OFFSET) {        \
 241                 VMLINUX_SYMBOL(__start_pci_fixups_early) = .;           \
 242                 *(.pci_fixup_early)                                     \
 243                 VMLINUX_SYMBOL(__end_pci_fixups_early) = .;             \
 244                 VMLINUX_SYMBOL(__start_pci_fixups_header) = .;          \
 245                 *(.pci_fixup_header)                                    \
 246                 VMLINUX_SYMBOL(__end_pci_fixups_header) = .;            \
 247                 VMLINUX_SYMBOL(__start_pci_fixups_final) = .;           \
 248                 *(.pci_fixup_final)                                     \
 249                 VMLINUX_SYMBOL(__end_pci_fixups_final) = .;             \
 250                 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .;          \
 251                 *(.pci_fixup_enable)                                    \
 252                 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .;            \
 253                 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .;          \
 254                 *(.pci_fixup_resume)                                    \
 255                 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .;            \
 256                 VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .;    \
 257                 *(.pci_fixup_resume_early)                              \
 258                 VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .;      \
 259                 VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .;         \
 260                 *(.pci_fixup_suspend)                                   \
 261                 VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .;           \
 262         }                                                               \
 263                                                                         \
 264         /* Built-in firmware blobs */                                   \
 265         .builtin_fw        : AT(ADDR(.builtin_fw) - LOAD_OFFSET) {      \
 266                 VMLINUX_SYMBOL(__start_builtin_fw) = .;                 \
 267                 *(.builtin_fw)                                          \
 268                 VMLINUX_SYMBOL(__end_builtin_fw) = .;                   \
 269         }                                                               \
 270                                                                         \
 271         TRACEDATA                                                       \
 272                                                                         \
 273         /* Kernel symbol table: Normal symbols */                       \
 274         __ksymtab         : AT(ADDR(__ksymtab) - LOAD_OFFSET) {         \
 275                 VMLINUX_SYMBOL(__start___ksymtab) = .;                  \
 276                 *(SORT(___ksymtab+*))                                   \
 277                 VMLINUX_SYMBOL(__stop___ksymtab) = .;                   \
 278         }                                                               \
 279                                                                         \
 280         /* Kernel symbol table: GPL-only symbols */                     \
 281         __ksymtab_gpl     : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) {     \
 282                 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .;              \
 283                 *(SORT(___ksymtab_gpl+*))                               \
 284                 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .;               \
 285         }                                                               \
 286                                                                         \
 287         /* Kernel symbol table: Normal unused symbols */                \
 288         __ksymtab_unused  : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) {  \
 289                 VMLINUX_SYMBOL(__start___ksymtab_unused) = .;           \
 290                 *(SORT(___ksymtab_unused+*))                            \
 291                 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .;            \
 292         }                                                               \
 293                                                                         \
 294         /* Kernel symbol table: GPL-only unused symbols */              \
 295         __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
 296                 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .;       \
 297                 *(SORT(___ksymtab_unused_gpl+*))                        \
 298                 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .;        \
 299         }                                                               \
 300                                                                         \
 301         /* Kernel symbol table: GPL-future-only symbols */              \
 302         __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
 303                 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .;       \
 304                 *(SORT(___ksymtab_gpl_future+*))                        \
 305                 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .;        \
 306         }                                                               \
 307                                                                         \
 308         /* Kernel symbol table: Normal symbols */                       \
 309         __kcrctab         : AT(ADDR(__kcrctab) - LOAD_OFFSET) {         \
 310                 VMLINUX_SYMBOL(__start___kcrctab) = .;                  \
 311                 *(SORT(___kcrctab+*))                                   \
 312                 VMLINUX_SYMBOL(__stop___kcrctab) = .;                   \
 313         }                                                               \
 314                                                                         \
 315         /* Kernel symbol table: GPL-only symbols */                     \
 316         __kcrctab_gpl     : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) {     \
 317                 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .;              \
 318                 *(SORT(___kcrctab_gpl+*))                               \
 319                 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .;               \
 320         }                                                               \
 321                                                                         \
 322         /* Kernel symbol table: Normal unused symbols */                \
 323         __kcrctab_unused  : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) {  \
 324                 VMLINUX_SYMBOL(__start___kcrctab_unused) = .;           \
 325                 *(SORT(___kcrctab_unused+*))                            \
 326                 VMLINUX_SYMBOL(__stop___kcrctab_unused) = .;            \
 327         }                                                               \
 328                                                                         \
 329         /* Kernel symbol table: GPL-only unused symbols */              \
 330         __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
 331                 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .;       \
 332                 *(SORT(___kcrctab_unused_gpl+*))                        \
 333                 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .;        \
 334         }                                                               \
 335                                                                         \
 336         /* Kernel symbol table: GPL-future-only symbols */              \
 337         __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
 338                 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .;       \
 339                 *(SORT(___kcrctab_gpl_future+*))                        \
 340                 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .;        \
 341         }                                                               \
 342                                                                         \
 343         /* Kernel symbol table: strings */                              \
 344         __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
 345                 *(__ksymtab_strings)                                    \
 346         }                                                               \
 347                                                                         \
 348         /* __*init sections */                                          \
 349         __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) {         \
 350                 *(.ref.rodata)                                          \
 351                 MEM_KEEP(init.rodata)                                   \
 352                 MEM_KEEP(exit.rodata)                                   \
 353         }                                                               \
 354                                                                         \
 355         /* Built-in module parameters. */                               \
 356         __param : AT(ADDR(__param) - LOAD_OFFSET) {                     \
 357                 VMLINUX_SYMBOL(__start___param) = .;                    \
 358                 *(__param)                                              \
 359                 VMLINUX_SYMBOL(__stop___param) = .;                     \
 360         }                                                               \
 361                                                                         \
 362         /* Built-in module versions. */                                 \
 363         __modver : AT(ADDR(__modver) - LOAD_OFFSET) {                   \
 364                 VMLINUX_SYMBOL(__start___modver) = .;                   \
 365                 *(__modver)                                             \
 366                 VMLINUX_SYMBOL(__stop___modver) = .;                    \
 367                 . = ALIGN((align));                                     \
 368                 VMLINUX_SYMBOL(__end_rodata) = .;                       \
 369         }                                                               \
 370         . = ALIGN((align));
 371
 372 /* RODATA & RO_DATA provided for backward compatibility.
 373  * All archs are supposed to use RO_DATA() */
 374 #define RODATA          RO_DATA_SECTION(4096)
 375 #define RO_DATA(align)  RO_DATA_SECTION(align)
 376
 377 #define SECURITY_INIT                                                   \
 378         .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
 379                 VMLINUX_SYMBOL(__security_initcall_start) = .;          \
 380                 *(.security_initcall.init)                              \
 381                 VMLINUX_SYMBOL(__security_initcall_end) = .;            \
 382         }
 383
 384 /* .text section. Map to function alignment to avoid address changes
 385  * during second ld run in second ld pass when generating System.map */
 386 #define TEXT_TEXT                                                       \
 387                 ALIGN_FUNCTION();                                       \
 388                 *(.text.hot)                                            \
 389                 *(.text)                                                \
 390                 *(.ref.text)                                            \
 391         MEM_KEEP(init.text)                                             \
 392         MEM_KEEP(exit.text)                                             \
 393                 *(.text.unlikely)
 394
 395
 396 /* sched.text is aling to function alignment to secure we have same
 397  * address even at second ld pass when generating System.map */
 398 #define SCHED_TEXT                                                      \
 399                 ALIGN_FUNCTION();                                       \
 400                 VMLINUX_SYMBOL(__sched_text_start) = .;                 \
 401                 *(.sched.text)                                          \
 402                 VMLINUX_SYMBOL(__sched_text_end) = .;
 403
 404 /* spinlock.text is aling to function alignment to secure we have same
 405  * address even at second ld pass when generating System.map */
 406 #define LOCK_TEXT                                                       \
 407                 ALIGN_FUNCTION();                                       \
 408                 VMLINUX_SYMBOL(__lock_text_start) = .;                  \
 409                 *(.spinlock.text)                                       \
 410                 VMLINUX_SYMBOL(__lock_text_end) = .;
 411
 412 #define KPROBES_TEXT                                                    \
 413                 ALIGN_FUNCTION();                                       \
 414                 VMLINUX_SYMBOL(__kprobes_text_start) = .;               \
 415                 *(.kprobes.text)                                        \
 416                 VMLINUX_SYMBOL(__kprobes_text_end) = .;
 417
 418 #define ENTRY_TEXT                                                      \
 419                 ALIGN_FUNCTION();                                       \
 420                 VMLINUX_SYMBOL(__entry_text_start) = .;                 \
 421                 *(.entry.text)                                          \
 422                 VMLINUX_SYMBOL(__entry_text_end) = .;
 423
 424 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
 425 #define IRQENTRY_TEXT                                                   \
 426                 ALIGN_FUNCTION();                                       \
 427                 VMLINUX_SYMBOL(__irqentry_text_start) = .;              \
 428                 *(.irqentry.text)                                       \
 429                 VMLINUX_SYMBOL(__irqentry_text_end) = .;
 430 #else
 431 #define IRQENTRY_TEXT
 432 #endif
 433
 434 /* Section used for early init (in .S files) */
 435 #define HEAD_TEXT  *(.head.text)
 436
 437 #define HEAD_TEXT_SECTION                                                       \
 438         .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) {               \
 439                 HEAD_TEXT                                               \
 440         }
 441
 442 /*
 443  * Exception table
 444  */
 445 #define EXCEPTION_TABLE(align)                                          \
 446         . = ALIGN(align);                                               \
 447         __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {               \
 448                 VMLINUX_SYMBOL(__start___ex_table) = .;                 \
 449                 *(__ex_table)                                           \
 450                 VMLINUX_SYMBOL(__stop___ex_table) = .;                  \
 451         }
 452
 453 /*
 454  * Init task
 455  */
 456 #define INIT_TASK_DATA_SECTION(align)                                   \
 457         . = ALIGN(align);                                               \
 458         .data..init_task :  AT(ADDR(.data..init_task) - LOAD_OFFSET) {  \
 459                 INIT_TASK_DATA(align)                                   \
 460         }
 461
 462 #ifdef CONFIG_CONSTRUCTORS
 463 #define KERNEL_CTORS()  . = ALIGN(8);                      \
 464                         VMLINUX_SYMBOL(__ctors_start) = .; \
 465                         *(.ctors)                          \
 466                         *(.init_array)                     \
 467                         VMLINUX_SYMBOL(__ctors_end) = .;
 468 #else
 469 #define KERNEL_CTORS()
 470 #endif
 471
 472 /* init and exit section handling */
 473 #define INIT_DATA                                                       \
 474         *(.init.data)                                                   \
 475         MEM_DISCARD(init.data)                                          \
 476         KERNEL_CTORS()                                                  \
 477         MCOUNT_REC()                                                    \
 478         *(.init.rodata)                                                 \
 479         FTRACE_EVENTS()                                                 \
 480         TRACE_SYSCALLS()                                                \
 481         MEM_DISCARD(init.rodata)                                        \
 482         CLK_OF_TABLES()                                                 \
 483         RESERVEDMEM_OF_TABLES()                                         \
 484         CLKSRC_OF_TABLES()                                              \
 485         CPU_METHOD_OF_TABLES()                                          \
 486         KERNEL_DTB()                                                    \
 487         IRQCHIP_OF_MATCH_TABLE()                                        \
 488         EARLYCON_OF_TABLES()
 489
 490 #define INIT_TEXT                                                       \
 491         *(.init.text)                                                   \
 492         MEM_DISCARD(init.text)
 493
 494 #define EXIT_DATA                                                       \
 495         *(.exit.data)                                                   \
 496         MEM_DISCARD(exit.data)                                          \
 497         MEM_DISCARD(exit.rodata)
 498
 499 #define EXIT_TEXT                                                       \
 500         *(.exit.text)                                                   \
 501         MEM_DISCARD(exit.text)
 502
 503 #define EXIT_CALL                                                       \
 504         *(.exitcall.exit)
 505
 506 /*
 507  * bss (Block Started by Symbol) - uninitialized data
 508  * zeroed during startup
 509  */
 510 #define SBSS(sbss_align)                                                \
 511         . = ALIGN(sbss_align);                                          \
 512         .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) {                         \
 513                 *(.sbss)                                                \
 514                 *(.scommon)                                             \
 515         }
 516
 517 /*
 518  * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra
 519  * sections to the front of bss.
 520  */
 521 #ifndef BSS_FIRST_SECTIONS
 522 #define BSS_FIRST_SECTIONS
 523 #endif
 524
 525 #define BSS(bss_align)                                                  \
 526         . = ALIGN(bss_align);                                           \
 527         .bss : AT(ADDR(.bss) - LOAD_OFFSET) {                           \
 528                 BSS_FIRST_SECTIONS                                      \
 529                 *(.bss..page_aligned)                                   \
 530                 *(.dynbss)                                              \
 531                 *(.bss)                                                 \
 532                 *(COMMON)                                               \
 533         }
 534
 535 /*
 536  * DWARF debug sections.
 537  * Symbols in the DWARF debugging sections are relative to
 538  * the beginning of the section so we begin them at 0.
 539  */
 540 #define DWARF_DEBUG                                                     \
 541                 /* DWARF 1 */                                           \
 542                 .debug          0 : { *(.debug) }                       \
 543                 .line           0 : { *(.line) }                        \
 544                 /* GNU DWARF 1 extensions */                            \
 545                 .debug_srcinfo  0 : { *(.debug_srcinfo) }               \
 546                 .debug_sfnames  0 : { *(.debug_sfnames) }               \
 547                 /* DWARF 1.1 and DWARF 2 */                             \
 548                 .debug_aranges  0 : { *(.debug_aranges) }               \
 549                 .debug_pubnames 0 : { *(.debug_pubnames) }              \
 550                 /* DWARF 2 */                                           \
 551                 .debug_info     0 : { *(.debug_info                     \
 552                                 .gnu.linkonce.wi.*) }                   \
 553                 .debug_abbrev   0 : { *(.debug_abbrev) }                \
 554                 .debug_line     0 : { *(.debug_line) }                  \
 555                 .debug_frame    0 : { *(.debug_frame) }                 \
 556                 .debug_str      0 : { *(.debug_str) }                   \
 557                 .debug_loc      0 : { *(.debug_loc) }                   \
 558                 .debug_macinfo  0 : { *(.debug_macinfo) }               \
 559                 /* SGI/MIPS DWARF 2 extensions */                       \
 560                 .debug_weaknames 0 : { *(.debug_weaknames) }            \
 561                 .debug_funcnames 0 : { *(.debug_funcnames) }            \
 562                 .debug_typenames 0 : { *(.debug_typenames) }            \
 563                 .debug_varnames  0 : { *(.debug_varnames) }             \
 564
 565                 /* Stabs debugging sections.  */
 566 #define STABS_DEBUG                                                     \
 567                 .stab 0 : { *(.stab) }                                  \
 568                 .stabstr 0 : { *(.stabstr) }                            \
 569                 .stab.excl 0 : { *(.stab.excl) }                        \
 570                 .stab.exclstr 0 : { *(.stab.exclstr) }                  \
 571                 .stab.index 0 : { *(.stab.index) }                      \
 572                 .stab.indexstr 0 : { *(.stab.indexstr) }                \
 573                 .comment 0 : { *(.comment) }
 574
 575 #ifdef CONFIG_GENERIC_BUG
 576 #define BUG_TABLE                                                       \
 577         . = ALIGN(8);                                                   \
 578         __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) {             \
 579                 VMLINUX_SYMBOL(__start___bug_table) = .;                \
 580                 *(__bug_table)                                          \
 581                 VMLINUX_SYMBOL(__stop___bug_table) = .;                 \
 582         }
 583 #else
 584 #define BUG_TABLE
 585 #endif
 586
 587 #ifdef CONFIG_PM_TRACE
 588 #define TRACEDATA                                                       \
 589         . = ALIGN(4);                                                   \
 590         .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) {               \
 591                 VMLINUX_SYMBOL(__tracedata_start) = .;                  \
 592                 *(.tracedata)                                           \
 593                 VMLINUX_SYMBOL(__tracedata_end) = .;                    \
 594         }
 595 #else
 596 #define TRACEDATA
 597 #endif
 598
 599 #define NOTES                                                           \
 600         .notes : AT(ADDR(.notes) - LOAD_OFFSET) {                       \
 601                 VMLINUX_SYMBOL(__start_notes) = .;                      \
 602                 *(.note.*)                                              \
 603                 VMLINUX_SYMBOL(__stop_notes) = .;                       \
 604         }
 605
 606 #define INIT_SETUP(initsetup_align)                                     \
 607                 . = ALIGN(initsetup_align);                             \
 608                 VMLINUX_SYMBOL(__setup_start) = .;                      \
 609                 *(.init.setup)                                          \
 610                 VMLINUX_SYMBOL(__setup_end) = .;
 611
 612 #define INIT_CALLS_LEVEL(level)                                         \
 613                 VMLINUX_SYMBOL(__initcall##level##_start) = .;          \
 614                 *(.initcall##level##.init)                              \
 615                 *(.initcall##level##s.init)                             \
 616
 617 #define INIT_CALLS                                                      \
 618                 VMLINUX_SYMBOL(__initcall_start) = .;                   \
 619                 *(.initcallearly.init)                                  \
 620                 INIT_CALLS_LEVEL(0)                                     \
 621                 INIT_CALLS_LEVEL(1)                                     \
 622                 INIT_CALLS_LEVEL(2)                                     \
 623                 INIT_CALLS_LEVEL(3)                                     \
 624                 INIT_CALLS_LEVEL(4)                                     \
 625                 INIT_CALLS_LEVEL(5)                                     \
 626                 INIT_CALLS_LEVEL(rootfs)                                \
 627                 INIT_CALLS_LEVEL(6)                                     \
 628                 INIT_CALLS_LEVEL(7)                                     \
 629                 VMLINUX_SYMBOL(__initcall_end) = .;
 630
 631 #define CON_INITCALL                                                    \
 632                 VMLINUX_SYMBOL(__con_initcall_start) = .;               \
 633                 *(.con_initcall.init)                                   \
 634                 VMLINUX_SYMBOL(__con_initcall_end) = .;
 635
 636 #define SECURITY_INITCALL                                               \
 637                 VMLINUX_SYMBOL(__security_initcall_start) = .;          \
 638                 *(.security_initcall.init)                              \
 639                 VMLINUX_SYMBOL(__security_initcall_end) = .;
 640
 641 #ifdef CONFIG_BLK_DEV_INITRD
 642 #define INIT_RAM_FS                                                     \
 643         . = ALIGN(4);                                                   \
 644         VMLINUX_SYMBOL(__initramfs_start) = .;                          \
 645         *(.init.ramfs)                                                  \
 646         . = ALIGN(8);                                                   \
 647         *(.init.ramfs.info)
 648 #else
 649 #define INIT_RAM_FS
 650 #endif
 651
 652 /*
 653  * Default discarded sections.
 654  *
 655  * Some archs want to discard exit text/data at runtime rather than
 656  * link time due to cross-section references such as alt instructions,
 657  * bug table, eh_frame, etc.  DISCARDS must be the last of output
 658  * section definitions so that such archs put those in earlier section
 659  * definitions.
 660  */
 661 #define DISCARDS                                                        \
 662         /DISCARD/ : {                                                   \
 663         EXIT_TEXT                                                       \
 664         EXIT_DATA                                                       \
 665         EXIT_CALL                                                       \
 666         *(.discard)                                                     \
 667         *(.discard.*)                                                   \
 668         }
 669
 670 /**
 671  * PERCPU_INPUT - the percpu input sections
 672  * @cacheline: cacheline size
 673  *
 674  * The core percpu section names and core symbols which do not rely
 675  * directly upon load addresses.
 676  *
 677  * @cacheline is used to align subsections to avoid false cacheline
 678  * sharing between subsections for different purposes.
 679  */
 680 #define PERCPU_INPUT(cacheline)                                         \
 681         VMLINUX_SYMBOL(__per_cpu_start) = .;                            \
 682         *(.data..percpu..first)                                         \
 683         . = ALIGN(PAGE_SIZE);                                           \
 684         *(.data..percpu..page_aligned)                                  \
 685         . = ALIGN(cacheline);                                           \
 686         *(.data..percpu..readmostly)                                    \
 687         . = ALIGN(cacheline);                                           \
 688         *(.data..percpu)                                                \
 689         *(.data..percpu..shared_aligned)                                \
 690         VMLINUX_SYMBOL(__per_cpu_end) = .;
 691
 692 /**
 693  * PERCPU_VADDR - define output section for percpu area
 694  * @cacheline: cacheline size
 695  * @vaddr: explicit base address (optional)
 696  * @phdr: destination PHDR (optional)
 697  *
 698  * Macro which expands to output section for percpu area.
 699  *
 700  * @cacheline is used to align subsections to avoid false cacheline
 701  * sharing between subsections for different purposes.
 702  *
 703  * If @vaddr is not blank, it specifies explicit base address and all
 704  * percpu symbols will be offset from the given address.  If blank,
 705  * @vaddr always equals @laddr + LOAD_OFFSET.
 706  *
 707  * @phdr defines the output PHDR to use if not blank.  Be warned that
 708  * output PHDR is sticky.  If @phdr is specified, the next output
 709  * section in the linker script will go there too.  @phdr should have
 710  * a leading colon.
 711  *
 712  * Note that this macros defines __per_cpu_load as an absolute symbol.
 713  * If there is no need to put the percpu section at a predetermined
 714  * address, use PERCPU_SECTION.
 715  */
 716 #define PERCPU_VADDR(cacheline, vaddr, phdr)                            \
 717         VMLINUX_SYMBOL(__per_cpu_load) = .;                             \
 718         .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load)         \
 719                                 - LOAD_OFFSET) {                        \
 720                 PERCPU_INPUT(cacheline)                                 \
 721         } phdr                                                          \
 722         . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu);
 723
 724 /**
 725  * PERCPU_SECTION - define output section for percpu area, simple version
 726  * @cacheline: cacheline size
 727  *
 728  * Align to PAGE_SIZE and outputs output section for percpu area.  This
 729  * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and
 730  * __per_cpu_start will be identical.
 731  *
 732  * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,)
 733  * except that __per_cpu_load is defined as a relative symbol against
 734  * .data..percpu which is required for relocatable x86_32 configuration.
 735  */
 736 #define PERCPU_SECTION(cacheline)                                       \
 737         . = ALIGN(PAGE_SIZE);                                           \
 738         .data..percpu   : AT(ADDR(.data..percpu) - LOAD_OFFSET) {       \
 739                 VMLINUX_SYMBOL(__per_cpu_load) = .;                     \
 740                 PERCPU_INPUT(cacheline)                                 \
 741         }
 742
 743
 744 /*
 745  * Definition of the high level *_SECTION macros
 746  * They will fit only a subset of the architectures
 747  */
 748
 749
 750 /*
 751  * Writeable data.
 752  * All sections are combined in a single .data section.
 753  * The sections following CONSTRUCTORS are arranged so their
 754  * typical alignment matches.
 755  * A cacheline is typical/always less than a PAGE_SIZE so
 756  * the sections that has this restriction (or similar)
 757  * is located before the ones requiring PAGE_SIZE alignment.
 758  * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
 759  * matches the requirement of PAGE_ALIGNED_DATA.
 760  *
 761  * use 0 as page_align if page_aligned data is not used */
 762 #define RW_DATA_SECTION(cacheline, pagealigned, inittask)               \
 763         . = ALIGN(PAGE_SIZE);                                           \
 764         .data : AT(ADDR(.data) - LOAD_OFFSET) {                         \
 765                 INIT_TASK_DATA(inittask)                                \
 766                 NOSAVE_DATA                                             \
 767                 PAGE_ALIGNED_DATA(pagealigned)                          \
 768                 CACHELINE_ALIGNED_DATA(cacheline)                       \
 769                 READ_MOSTLY_DATA(cacheline)                             \
 770                 DATA_DATA                                               \
 771                 CONSTRUCTORS                                            \
 772         }
 773
 774 #define INIT_TEXT_SECTION(inittext_align)                               \
 775         . = ALIGN(inittext_align);                                      \
 776         .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {               \
 777                 VMLINUX_SYMBOL(_sinittext) = .;                         \
 778                 INIT_TEXT                                               \
 779                 VMLINUX_SYMBOL(_einittext) = .;                         \
 780         }
 781
 782 #define INIT_DATA_SECTION(initsetup_align)                              \
 783         .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {               \
 784                 INIT_DATA                                               \
 785                 INIT_SETUP(initsetup_align)                             \
 786                 INIT_CALLS                                              \
 787                 CON_INITCALL                                            \
 788                 SECURITY_INITCALL                                       \
 789                 INIT_RAM_FS                                             \
 790         }
 791
 792 #define BSS_SECTION(sbss_align, bss_align, stop_align)                  \
 793         . = ALIGN(sbss_align);                                          \
 794         VMLINUX_SYMBOL(__bss_start) = .;                                \
 795         SBSS(sbss_align)                                                \
 796         BSS(bss_align)                                                  \
 797         . = ALIGN(stop_align);                                          \
 798         VMLINUX_SYMBOL(__bss_stop) = .;