include/asm-generic/vmlinux.lds.h

   1 #ifndef LOAD_OFFSET
   2 #define LOAD_OFFSET 0
   3 #endif
   4
   5 #ifndef VMLINUX_SYMBOL
   6 #define VMLINUX_SYMBOL(_sym_) _sym_
   7 #endif
   8
   9 /* Align . to a 8 byte boundary equals to maximum function alignment. */
  10 #define ALIGN_FUNCTION()  . = ALIGN(8)
  11
  12 /* The actual configuration determine if the init/exit sections
  13  * are handled as text/data or they can be discarded (which
  14  * often happens at runtime)
  15  */
  16 #ifdef CONFIG_HOTPLUG
  17 #define DEV_KEEP(sec)    *(.dev##sec)
  18 #define DEV_DISCARD(sec)
  19 #else
  20 #define DEV_KEEP(sec)
  21 #define DEV_DISCARD(sec) *(.dev##sec)
  22 #endif
  23
  24 #ifdef CONFIG_HOTPLUG_CPU
  25 #define CPU_KEEP(sec)    *(.cpu##sec)
  26 #define CPU_DISCARD(sec)
  27 #else
  28 #define CPU_KEEP(sec)
  29 #define CPU_DISCARD(sec) *(.cpu##sec)
  30 #endif
  31
  32 #if defined(CONFIG_MEMORY_HOTPLUG)
  33 #define MEM_KEEP(sec)    *(.mem##sec)
  34 #define MEM_DISCARD(sec)
  35 #else
  36 #define MEM_KEEP(sec)
  37 #define MEM_DISCARD(sec) *(.mem##sec)
  38 #endif
  39
  40 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
  41 #define MCOUNT_REC()    VMLINUX_SYMBOL(__start_mcount_loc) = .; \
  42                         *(__mcount_loc)                         \
  43                         VMLINUX_SYMBOL(__stop_mcount_loc) = .;
  44 #else
  45 #define MCOUNT_REC()
  46 #endif
  47
  48 #ifdef CONFIG_TRACE_BRANCH_PROFILING
  49 #define LIKELY_PROFILE()        VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \
  50                                 *(_ftrace_annotated_branch)                           \
  51                                 VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .;
  52 #else
  53 #define LIKELY_PROFILE()
  54 #endif
  55
  56 #ifdef CONFIG_PROFILE_ALL_BRANCHES
  57 #define BRANCH_PROFILE()        VMLINUX_SYMBOL(__start_branch_profile) = .;   \
  58                                 *(_ftrace_branch)                             \
  59                                 VMLINUX_SYMBOL(__stop_branch_profile) = .;
  60 #else
  61 #define BRANCH_PROFILE()
  62 #endif
  63
  64 #ifdef CONFIG_EVENT_TRACER
  65 #define FTRACE_EVENTS() VMLINUX_SYMBOL(__start_ftrace_events) = .;      \
  66                         *(_ftrace_events)                               \
  67                         VMLINUX_SYMBOL(__stop_ftrace_events) = .;
  68 #else
  69 #define FTRACE_EVENTS()
  70 #endif
  71
  72 #ifdef CONFIG_TRACING
  73 #define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .;      \
  74                          *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \
  75                          VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .;
  76 #else
  77 #define TRACE_PRINTKS()
  78 #endif
  79
  80 #ifdef CONFIG_FTRACE_SYSCALLS
  81 #define TRACE_SYSCALLS() VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \
  82                          *(__syscalls_metadata)                         \
  83                          VMLINUX_SYMBOL(__stop_syscalls_metadata) = .;
  84 #else
  85 #define TRACE_SYSCALLS()
  86 #endif
  87
  88 /* .data section */
  89 #define DATA_DATA                                                       \
  90         *(.data)                                                        \
  91         *(.data.init.refok)                                             \
  92         *(.ref.data)                                                    \
  93         DEV_KEEP(init.data)                                             \
  94         DEV_KEEP(exit.data)                                             \
  95         CPU_KEEP(init.data)                                             \
  96         CPU_KEEP(exit.data)                                             \
  97         MEM_KEEP(init.data)                                             \
  98         MEM_KEEP(exit.data)                                             \
  99         . = ALIGN(8);                                                   \
 100         VMLINUX_SYMBOL(__start___markers) = .;                          \
 101         *(__markers)                                                    \
 102         VMLINUX_SYMBOL(__stop___markers) = .;                           \
 103         . = ALIGN(32);                                                  \
 104         VMLINUX_SYMBOL(__start___tracepoints) = .;                      \
 105         *(__tracepoints)                                                \
 106         VMLINUX_SYMBOL(__stop___tracepoints) = .;                       \
 107         LIKELY_PROFILE()                                                \
 108         BRANCH_PROFILE()                                                \
 109         TRACE_PRINTKS()                                                 \
 110         FTRACE_EVENTS()                                                 \
 111         TRACE_SYSCALLS()
 112
 113 #define RO_DATA(align)                                                  \
 114         . = ALIGN((align));                                             \
 115         .rodata           : AT(ADDR(.rodata) - LOAD_OFFSET) {           \
 116                 VMLINUX_SYMBOL(__start_rodata) = .;                     \
 117                 *(.rodata) *(.rodata.*)                                 \
 118                 *(__vermagic)           /* Kernel version magic */      \
 119                 *(__markers_strings)    /* Markers: strings */          \
 120                 *(__tracepoints_strings)/* Tracepoints: strings */      \
 121         }                                                               \
 122                                                                         \
 123         .rodata1          : AT(ADDR(.rodata1) - LOAD_OFFSET) {          \
 124                 *(.rodata1)                                             \
 125         }                                                               \
 126                                                                         \
 127         BUG_TABLE                                                       \
 128                                                                         \
 129         /* PCI quirks */                                                \
 130         .pci_fixup        : AT(ADDR(.pci_fixup) - LOAD_OFFSET) {        \
 131                 VMLINUX_SYMBOL(__start_pci_fixups_early) = .;           \
 132                 *(.pci_fixup_early)                                     \
 133                 VMLINUX_SYMBOL(__end_pci_fixups_early) = .;             \
 134                 VMLINUX_SYMBOL(__start_pci_fixups_header) = .;          \
 135                 *(.pci_fixup_header)                                    \
 136                 VMLINUX_SYMBOL(__end_pci_fixups_header) = .;            \
 137                 VMLINUX_SYMBOL(__start_pci_fixups_final) = .;           \
 138                 *(.pci_fixup_final)                                     \
 139                 VMLINUX_SYMBOL(__end_pci_fixups_final) = .;             \
 140                 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .;          \
 141                 *(.pci_fixup_enable)                                    \
 142                 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .;            \
 143                 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .;          \
 144                 *(.pci_fixup_resume)                                    \
 145                 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .;            \
 146                 VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .;    \
 147                 *(.pci_fixup_resume_early)                              \
 148                 VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .;      \
 149                 VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .;         \
 150                 *(.pci_fixup_suspend)                                   \
 151                 VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .;           \
 152         }                                                               \
 153                                                                         \
 154         /* Built-in firmware blobs */                                   \
 155         .builtin_fw        : AT(ADDR(.builtin_fw) - LOAD_OFFSET) {      \
 156                 VMLINUX_SYMBOL(__start_builtin_fw) = .;                 \
 157                 *(.builtin_fw)                                          \
 158                 VMLINUX_SYMBOL(__end_builtin_fw) = .;                   \
 159         }                                                               \
 160                                                                         \
 161         /* RapidIO route ops */                                         \
 162         .rio_route        : AT(ADDR(.rio_route) - LOAD_OFFSET) {        \
 163                 VMLINUX_SYMBOL(__start_rio_route_ops) = .;              \
 164                 *(.rio_route_ops)                                       \
 165                 VMLINUX_SYMBOL(__end_rio_route_ops) = .;                \
 166         }                                                               \
 167                                                                         \
 168         TRACEDATA                                                       \
 169                                                                         \
 170         /* Kernel symbol table: Normal symbols */                       \
 171         __ksymtab         : AT(ADDR(__ksymtab) - LOAD_OFFSET) {         \
 172                 VMLINUX_SYMBOL(__start___ksymtab) = .;                  \
 173                 *(__ksymtab)                                            \
 174                 VMLINUX_SYMBOL(__stop___ksymtab) = .;                   \
 175         }                                                               \
 176                                                                         \
 177         /* Kernel symbol table: GPL-only symbols */                     \
 178         __ksymtab_gpl     : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) {     \
 179                 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .;              \
 180                 *(__ksymtab_gpl)                                        \
 181                 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .;               \
 182         }                                                               \
 183                                                                         \
 184         /* Kernel symbol table: Normal unused symbols */                \
 185         __ksymtab_unused  : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) {  \
 186                 VMLINUX_SYMBOL(__start___ksymtab_unused) = .;           \
 187                 *(__ksymtab_unused)                                     \
 188                 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .;            \
 189         }                                                               \
 190                                                                         \
 191         /* Kernel symbol table: GPL-only unused symbols */              \
 192         __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
 193                 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .;       \
 194                 *(__ksymtab_unused_gpl)                                 \
 195                 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .;        \
 196         }                                                               \
 197                                                                         \
 198         /* Kernel symbol table: GPL-future-only symbols */              \
 199         __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
 200                 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .;       \
 201                 *(__ksymtab_gpl_future)                                 \
 202                 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .;        \
 203         }                                                               \
 204                                                                         \
 205         /* Kernel symbol table: Normal symbols */                       \
 206         __kcrctab         : AT(ADDR(__kcrctab) - LOAD_OFFSET) {         \
 207                 VMLINUX_SYMBOL(__start___kcrctab) = .;                  \
 208                 *(__kcrctab)                                            \
 209                 VMLINUX_SYMBOL(__stop___kcrctab) = .;                   \
 210         }                                                               \
 211                                                                         \
 212         /* Kernel symbol table: GPL-only symbols */                     \
 213         __kcrctab_gpl     : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) {     \
 214                 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .;              \
 215                 *(__kcrctab_gpl)                                        \
 216                 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .;               \
 217         }                                                               \
 218                                                                         \
 219         /* Kernel symbol table: Normal unused symbols */                \
 220         __kcrctab_unused  : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) {  \
 221                 VMLINUX_SYMBOL(__start___kcrctab_unused) = .;           \
 222                 *(__kcrctab_unused)                                     \
 223                 VMLINUX_SYMBOL(__stop___kcrctab_unused) = .;            \
 224         }                                                               \
 225                                                                         \
 226         /* Kernel symbol table: GPL-only unused symbols */              \
 227         __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
 228                 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .;       \
 229                 *(__kcrctab_unused_gpl)                                 \
 230                 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .;        \
 231         }                                                               \
 232                                                                         \
 233         /* Kernel symbol table: GPL-future-only symbols */              \
 234         __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
 235                 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .;       \
 236                 *(__kcrctab_gpl_future)                                 \
 237                 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .;        \
 238         }                                                               \
 239                                                                         \
 240         /* Kernel symbol table: strings */                              \
 241         __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
 242                 *(__ksymtab_strings)                                    \
 243         }                                                               \
 244                                                                         \
 245         /* __*init sections */                                          \
 246         __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) {         \
 247                 *(.ref.rodata)                                          \
 248                 MCOUNT_REC()                                            \
 249                 DEV_KEEP(init.rodata)                                   \
 250                 DEV_KEEP(exit.rodata)                                   \
 251                 CPU_KEEP(init.rodata)                                   \
 252                 CPU_KEEP(exit.rodata)                                   \
 253                 MEM_KEEP(init.rodata)                                   \
 254                 MEM_KEEP(exit.rodata)                                   \
 255         }                                                               \
 256                                                                         \
 257         /* Built-in module parameters. */                               \
 258         __param : AT(ADDR(__param) - LOAD_OFFSET) {                     \
 259                 VMLINUX_SYMBOL(__start___param) = .;                    \
 260                 *(__param)                                              \
 261                 VMLINUX_SYMBOL(__stop___param) = .;                     \
 262                 . = ALIGN((align));                                     \
 263                 VMLINUX_SYMBOL(__end_rodata) = .;                       \
 264         }                                                               \
 265         . = ALIGN((align));
 266
 267 /* RODATA provided for backward compatibility.
 268  * All archs are supposed to use RO_DATA() */
 269 #define RODATA RO_DATA(4096)
 270
 271 #define SECURITY_INIT                                                   \
 272         .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
 273                 VMLINUX_SYMBOL(__security_initcall_start) = .;          \
 274                 *(.security_initcall.init)                              \
 275                 VMLINUX_SYMBOL(__security_initcall_end) = .;            \
 276         }
 277
 278 /* .text section. Map to function alignment to avoid address changes
 279  * during second ld run in second ld pass when generating System.map */
 280 #define TEXT_TEXT                                                       \
 281                 ALIGN_FUNCTION();                                       \
 282                 *(.text.hot)                                            \
 283                 *(.text)                                                \
 284                 *(.ref.text)                                            \
 285                 *(.text.init.refok)                                     \
 286                 *(.exit.text.refok)                                     \
 287         DEV_KEEP(init.text)                                             \
 288         DEV_KEEP(exit.text)                                             \
 289         CPU_KEEP(init.text)                                             \
 290         CPU_KEEP(exit.text)                                             \
 291         MEM_KEEP(init.text)                                             \
 292         MEM_KEEP(exit.text)                                             \
 293                 *(.text.unlikely)
 294
 295
 296 /* sched.text is aling to function alignment to secure we have same
 297  * address even at second ld pass when generating System.map */
 298 #define SCHED_TEXT                                                      \
 299                 ALIGN_FUNCTION();                                       \
 300                 VMLINUX_SYMBOL(__sched_text_start) = .;                 \
 301                 *(.sched.text)                                          \
 302                 VMLINUX_SYMBOL(__sched_text_end) = .;
 303
 304 /* spinlock.text is aling to function alignment to secure we have same
 305  * address even at second ld pass when generating System.map */
 306 #define LOCK_TEXT                                                       \
 307                 ALIGN_FUNCTION();                                       \
 308                 VMLINUX_SYMBOL(__lock_text_start) = .;                  \
 309                 *(.spinlock.text)                                       \
 310                 VMLINUX_SYMBOL(__lock_text_end) = .;
 311
 312 #define KPROBES_TEXT                                                    \
 313                 ALIGN_FUNCTION();                                       \
 314                 VMLINUX_SYMBOL(__kprobes_text_start) = .;               \
 315                 *(.kprobes.text)                                        \
 316                 VMLINUX_SYMBOL(__kprobes_text_end) = .;
 317
 318 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
 319 #define IRQENTRY_TEXT                                                   \
 320                 ALIGN_FUNCTION();                                       \
 321                 VMLINUX_SYMBOL(__irqentry_text_start) = .;              \
 322                 *(.irqentry.text)                                       \
 323                 VMLINUX_SYMBOL(__irqentry_text_end) = .;
 324 #else
 325 #define IRQENTRY_TEXT
 326 #endif
 327
 328 /* Section used for early init (in .S files) */
 329 #define HEAD_TEXT  *(.head.text)
 330
 331 /* init and exit section handling */
 332 #define INIT_DATA                                                       \
 333         *(.init.data)                                                   \
 334         DEV_DISCARD(init.data)                                          \
 335         DEV_DISCARD(init.rodata)                                        \
 336         CPU_DISCARD(init.data)                                          \
 337         CPU_DISCARD(init.rodata)                                        \
 338         MEM_DISCARD(init.data)                                          \
 339         MEM_DISCARD(init.rodata)                                        \
 340         /* implement dynamic printk debug */                            \
 341         VMLINUX_SYMBOL(__start___verbose_strings) = .;                  \
 342         *(__verbose_strings)                                            \
 343         VMLINUX_SYMBOL(__stop___verbose_strings) = .;                   \
 344         . = ALIGN(8);                                                   \
 345         VMLINUX_SYMBOL(__start___verbose) = .;                          \
 346         *(__verbose)                                                    \
 347         VMLINUX_SYMBOL(__stop___verbose) = .;
 348
 349 #define INIT_TEXT                                                       \
 350         *(.init.text)                                                   \
 351         DEV_DISCARD(init.text)                                          \
 352         CPU_DISCARD(init.text)                                          \
 353         MEM_DISCARD(init.text)
 354
 355 #define EXIT_DATA                                                       \
 356         *(.exit.data)                                                   \
 357         DEV_DISCARD(exit.data)                                          \
 358         DEV_DISCARD(exit.rodata)                                        \
 359         CPU_DISCARD(exit.data)                                          \
 360         CPU_DISCARD(exit.rodata)                                        \
 361         MEM_DISCARD(exit.data)                                          \
 362         MEM_DISCARD(exit.rodata)
 363
 364 #define EXIT_TEXT                                                       \
 365         *(.exit.text)                                                   \
 366         DEV_DISCARD(exit.text)                                          \
 367         CPU_DISCARD(exit.text)                                          \
 368         MEM_DISCARD(exit.text)
 369
 370                 /* DWARF debug sections.
 371                 Symbols in the DWARF debugging sections are relative to
 372                 the beginning of the section so we begin them at 0.  */
 373 #define DWARF_DEBUG                                                     \
 374                 /* DWARF 1 */                                           \
 375                 .debug          0 : { *(.debug) }                       \
 376                 .line           0 : { *(.line) }                        \
 377                 /* GNU DWARF 1 extensions */                            \
 378                 .debug_srcinfo  0 : { *(.debug_srcinfo) }               \
 379                 .debug_sfnames  0 : { *(.debug_sfnames) }               \
 380                 /* DWARF 1.1 and DWARF 2 */                             \
 381                 .debug_aranges  0 : { *(.debug_aranges) }               \
 382                 .debug_pubnames 0 : { *(.debug_pubnames) }              \
 383                 /* DWARF 2 */                                           \
 384                 .debug_info     0 : { *(.debug_info                     \
 385                                 .gnu.linkonce.wi.*) }                   \
 386                 .debug_abbrev   0 : { *(.debug_abbrev) }                \
 387                 .debug_line     0 : { *(.debug_line) }                  \
 388                 .debug_frame    0 : { *(.debug_frame) }                 \
 389                 .debug_str      0 : { *(.debug_str) }                   \
 390                 .debug_loc      0 : { *(.debug_loc) }                   \
 391                 .debug_macinfo  0 : { *(.debug_macinfo) }               \
 392                 /* SGI/MIPS DWARF 2 extensions */                       \
 393                 .debug_weaknames 0 : { *(.debug_weaknames) }            \
 394                 .debug_funcnames 0 : { *(.debug_funcnames) }            \
 395                 .debug_typenames 0 : { *(.debug_typenames) }            \
 396                 .debug_varnames  0 : { *(.debug_varnames) }             \
 397
 398                 /* Stabs debugging sections.  */
 399 #define STABS_DEBUG                                                     \
 400                 .stab 0 : { *(.stab) }                                  \
 401                 .stabstr 0 : { *(.stabstr) }                            \
 402                 .stab.excl 0 : { *(.stab.excl) }                        \
 403                 .stab.exclstr 0 : { *(.stab.exclstr) }                  \
 404                 .stab.index 0 : { *(.stab.index) }                      \
 405                 .stab.indexstr 0 : { *(.stab.indexstr) }                \
 406                 .comment 0 : { *(.comment) }
 407
 408 #ifdef CONFIG_GENERIC_BUG
 409 #define BUG_TABLE                                                       \
 410         . = ALIGN(8);                                                   \
 411         __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) {             \
 412                 VMLINUX_SYMBOL(__start___bug_table) = .;                \
 413                 *(__bug_table)                                          \
 414                 VMLINUX_SYMBOL(__stop___bug_table) = .;                 \
 415         }
 416 #else
 417 #define BUG_TABLE
 418 #endif
 419
 420 #ifdef CONFIG_PM_TRACE
 421 #define TRACEDATA                                                       \
 422         . = ALIGN(4);                                                   \
 423         .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) {               \
 424                 VMLINUX_SYMBOL(__tracedata_start) = .;                  \
 425                 *(.tracedata)                                           \
 426                 VMLINUX_SYMBOL(__tracedata_end) = .;                    \
 427         }
 428 #else
 429 #define TRACEDATA
 430 #endif
 431
 432 #define NOTES                                                           \
 433         .notes : AT(ADDR(.notes) - LOAD_OFFSET) {                       \
 434                 VMLINUX_SYMBOL(__start_notes) = .;                      \
 435                 *(.note.*)                                              \
 436                 VMLINUX_SYMBOL(__stop_notes) = .;                       \
 437         }
 438
 439 #define INITCALLS                                                       \
 440         *(.initcallearly.init)                                          \
 441         VMLINUX_SYMBOL(__early_initcall_end) = .;                       \
 442         *(.initcall0.init)                                              \
 443         *(.initcall0s.init)                                             \
 444         *(.initcall1.init)                                              \
 445         *(.initcall1s.init)                                             \
 446         *(.initcall2.init)                                              \
 447         *(.initcall2s.init)                                             \
 448         *(.initcall3.init)                                              \
 449         *(.initcall3s.init)                                             \
 450         *(.initcall4.init)                                              \
 451         *(.initcall4s.init)                                             \
 452         *(.initcall5.init)                                              \
 453         *(.initcall5s.init)                                             \
 454         *(.initcallrootfs.init)                                         \
 455         *(.initcall6.init)                                              \
 456         *(.initcall6s.init)                                             \
 457         *(.initcall7.init)                                              \
 458         *(.initcall7s.init)
 459
 460 /**
 461  * PERCPU_VADDR - define output section for percpu area
 462  * @vaddr: explicit base address (optional)
 463  * @phdr: destination PHDR (optional)
 464  *
 465  * Macro which expands to output section for percpu area.  If @vaddr
 466  * is not blank, it specifies explicit base address and all percpu
 467  * symbols will be offset from the given address.  If blank, @vaddr
 468  * always equals @laddr + LOAD_OFFSET.
 469  *
 470  * @phdr defines the output PHDR to use if not blank.  Be warned that
 471  * output PHDR is sticky.  If @phdr is specified, the next output
 472  * section in the linker script will go there too.  @phdr should have
 473  * a leading colon.
 474  *
 475  * Note that this macros defines __per_cpu_load as an absolute symbol.
 476  * If there is no need to put the percpu section at a predetermined
 477  * address, use PERCPU().
 478  */
 479 #define PERCPU_VADDR(vaddr, phdr)                                       \
 480         VMLINUX_SYMBOL(__per_cpu_load) = .;                             \
 481         .data.percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load)          \
 482                                 - LOAD_OFFSET) {                        \
 483                 VMLINUX_SYMBOL(__per_cpu_start) = .;                    \
 484                 *(.data.percpu.first)                                   \
 485                 *(.data.percpu.page_aligned)                            \
 486                 *(.data.percpu)                                         \
 487                 *(.data.percpu.shared_aligned)                          \
 488                 VMLINUX_SYMBOL(__per_cpu_end) = .;                      \
 489         } phdr                                                          \
 490         . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data.percpu);
 491
 492 /**
 493  * PERCPU - define output section for percpu area, simple version
 494  * @align: required alignment
 495  *
 496  * Align to @align and outputs output section for percpu area.  This
 497  * macro doesn't maniuplate @vaddr or @phdr and __per_cpu_load and
 498  * __per_cpu_start will be identical.
 499  *
 500  * This macro is equivalent to ALIGN(align); PERCPU_VADDR( , ) except
 501  * that __per_cpu_load is defined as a relative symbol against
 502  * .data.percpu which is required for relocatable x86_32
 503  * configuration.
 504  */
 505 #define PERCPU(align)                                                   \
 506         . = ALIGN(align);                                               \
 507         .data.percpu    : AT(ADDR(.data.percpu) - LOAD_OFFSET) {        \
 508                 VMLINUX_SYMBOL(__per_cpu_load) = .;                     \
 509                 VMLINUX_SYMBOL(__per_cpu_start) = .;                    \
 510                 *(.data.percpu.first)                                   \
 511                 *(.data.percpu.page_aligned)                            \
 512                 *(.data.percpu)                                         \
 513                 *(.data.percpu.shared_aligned)                          \
 514                 VMLINUX_SYMBOL(__per_cpu_end) = .;                      \
 515         }