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(PAGE_SIZE)
  27  *      RW_DATA(...)
  28  *      _edata = .;
  29  *
  30  *      EXCEPTION_TABLE(...)
  31  *
  32  *      BSS_SECTION(0, 0, 0)
  33  *      _end = .;
  34  *
  35  *      STABS_DEBUG
  36  *      DWARF_DEBUG
  37  *      ELF_DETAILS
  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  *      // __init_begin and __init_end should be page aligned, so that we can
  44  *      // free the whole .init memory
  45  * [_stext, _etext] is the text section
  46  * [_sdata, _edata] is the data section
  47  *
  48  * Some of the included output section have their own set of constants.
  49  * Examples are: [__initramfs_start, __initramfs_end] for initramfs and
  50  *               [__nosave_begin, __nosave_end] for the nosave data
  51  */
  52
  53 #ifndef LOAD_OFFSET
  54 #define LOAD_OFFSET 0
  55 #endif
  56
  57 /*
  58  * Only some architectures want to have the .notes segment visible in
  59  * a separate PT_NOTE ELF Program Header. When this happens, it needs
  60  * to be visible in both the kernel text's PT_LOAD and the PT_NOTE
  61  * Program Headers. In this case, though, the PT_LOAD needs to be made
  62  * the default again so that all the following sections don't also end
  63  * up in the PT_NOTE Program Header.
  64  */
  65 #ifdef EMITS_PT_NOTE
  66 #define NOTES_HEADERS           :text :note
  67 #define NOTES_HEADERS_RESTORE   __restore_ph : { *(.__restore_ph) } :text
  68 #else
  69 #define NOTES_HEADERS
  70 #define NOTES_HEADERS_RESTORE
  71 #endif
  72
  73 /*
  74  * Some architectures have non-executable read-only exception tables.
  75  * They can be added to the RO_DATA segment by specifying their desired
  76  * alignment.
  77  */
  78 #ifdef RO_EXCEPTION_TABLE_ALIGN
  79 #define RO_EXCEPTION_TABLE      EXCEPTION_TABLE(RO_EXCEPTION_TABLE_ALIGN)
  80 #else
  81 #define RO_EXCEPTION_TABLE
  82 #endif
  83
  84 /* Align . to a 8 byte boundary equals to maximum function alignment. */
  85 #define ALIGN_FUNCTION()  . = ALIGN(8)
  86
  87 /*
  88  * LD_DEAD_CODE_DATA_ELIMINATION option enables -fdata-sections, which
  89  * generates .data.identifier sections, which need to be pulled in with
  90  * .data. We don't want to pull in .data..other sections, which Linux
  91  * has defined. Same for text and bss.
  92  *
  93  * RODATA_MAIN is not used because existing code already defines .rodata.x
  94  * sections to be brought in with rodata.
  95  */
  96 #ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
  97 #define TEXT_MAIN .text .text.[0-9a-zA-Z_]*
  98 #define DATA_MAIN .data .data.[0-9a-zA-Z_]* .data..LPBX*
  99 #define SDATA_MAIN .sdata .sdata.[0-9a-zA-Z_]*
 100 #define RODATA_MAIN .rodata .rodata.[0-9a-zA-Z_]*
 101 #define BSS_MAIN .bss .bss.[0-9a-zA-Z_]*
 102 #define SBSS_MAIN .sbss .sbss.[0-9a-zA-Z_]*
 103 #else
 104 #define TEXT_MAIN .text
 105 #define DATA_MAIN .data
 106 #define SDATA_MAIN .sdata
 107 #define RODATA_MAIN .rodata
 108 #define BSS_MAIN .bss
 109 #define SBSS_MAIN .sbss
 110 #endif
 111
 112 /*
 113  * GCC 4.5 and later have a 32 bytes section alignment for structures.
 114  * Except GCC 4.9, that feels the need to align on 64 bytes.
 115  */
 116 #if __GNUC__ == 4 && __GNUC_MINOR__ == 9
 117 #define STRUCT_ALIGNMENT 64
 118 #else
 119 #define STRUCT_ALIGNMENT 32
 120 #endif
 121 #define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT)
 122
 123 /*
 124  * The order of the sched class addresses are important, as they are
 125  * used to determine the order of the priority of each sched class in
 126  * relation to each other.
 127  */
 128 #define SCHED_DATA                              \
 129         STRUCT_ALIGN();                         \
 130         __begin_sched_classes = .;              \
 131         *(__idle_sched_class)                   \
 132         *(__fair_sched_class)                   \
 133         *(__rt_sched_class)                     \
 134         *(__dl_sched_class)                     \
 135         *(__stop_sched_class)                   \
 136         __end_sched_classes = .;
 137
 138 /* The actual configuration determine if the init/exit sections
 139  * are handled as text/data or they can be discarded (which
 140  * often happens at runtime)
 141  */
 142 #ifdef CONFIG_HOTPLUG_CPU
 143 #define CPU_KEEP(sec)    *(.cpu##sec)
 144 #define CPU_DISCARD(sec)
 145 #else
 146 #define CPU_KEEP(sec)
 147 #define CPU_DISCARD(sec) *(.cpu##sec)
 148 #endif
 149
 150 #if defined(CONFIG_MEMORY_HOTPLUG)
 151 #define MEM_KEEP(sec)    *(.mem##sec)
 152 #define MEM_DISCARD(sec)
 153 #else
 154 #define MEM_KEEP(sec)
 155 #define MEM_DISCARD(sec) *(.mem##sec)
 156 #endif
 157
 158 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
 159 /*
 160  * The ftrace call sites are logged to a section whose name depends on the
 161  * compiler option used. A given kernel image will only use one, AKA
 162  * FTRACE_CALLSITE_SECTION. We capture all of them here to avoid header
 163  * dependencies for FTRACE_CALLSITE_SECTION's definition.
 164  *
 165  * Need to also make ftrace_stub_graph point to ftrace_stub
 166  * so that the same stub location may have different protocols
 167  * and not mess up with C verifiers.
 168  */
 169 #define MCOUNT_REC()    . = ALIGN(8);                           \
 170                         __start_mcount_loc = .;                 \
 171                         KEEP(*(__mcount_loc))                   \
 172                         KEEP(*(__patchable_function_entries))   \
 173                         __stop_mcount_loc = .;                  \
 174                         ftrace_stub_graph = ftrace_stub;
 175 #else
 176 # ifdef CONFIG_FUNCTION_TRACER
 177 #  define MCOUNT_REC()  ftrace_stub_graph = ftrace_stub;
 178 # else
 179 #  define MCOUNT_REC()
 180 # endif
 181 #endif
 182
 183 #ifdef CONFIG_TRACE_BRANCH_PROFILING
 184 #define LIKELY_PROFILE()        __start_annotated_branch_profile = .;   \
 185                                 KEEP(*(_ftrace_annotated_branch))       \
 186                                 __stop_annotated_branch_profile = .;
 187 #else
 188 #define LIKELY_PROFILE()
 189 #endif
 190
 191 #ifdef CONFIG_PROFILE_ALL_BRANCHES
 192 #define BRANCH_PROFILE()        __start_branch_profile = .;             \
 193                                 KEEP(*(_ftrace_branch))                 \
 194                                 __stop_branch_profile = .;
 195 #else
 196 #define BRANCH_PROFILE()
 197 #endif
 198
 199 #ifdef CONFIG_KPROBES
 200 #define KPROBE_BLACKLIST()      . = ALIGN(8);                                 \
 201                                 __start_kprobe_blacklist = .;                 \
 202                                 KEEP(*(_kprobe_blacklist))                    \
 203                                 __stop_kprobe_blacklist = .;
 204 #else
 205 #define KPROBE_BLACKLIST()
 206 #endif
 207
 208 #ifdef CONFIG_FUNCTION_ERROR_INJECTION
 209 #define ERROR_INJECT_WHITELIST()        STRUCT_ALIGN();                       \
 210                         __start_error_injection_whitelist = .;                \
 211                         KEEP(*(_error_injection_whitelist))                   \
 212                         __stop_error_injection_whitelist = .;
 213 #else
 214 #define ERROR_INJECT_WHITELIST()
 215 #endif
 216
 217 #ifdef CONFIG_EVENT_TRACING
 218 #define FTRACE_EVENTS() . = ALIGN(8);                                   \
 219                         __start_ftrace_events = .;                      \
 220                         KEEP(*(_ftrace_events))                         \
 221                         __stop_ftrace_events = .;                       \
 222                         __start_ftrace_eval_maps = .;                   \
 223                         KEEP(*(_ftrace_eval_map))                       \
 224                         __stop_ftrace_eval_maps = .;
 225 #else
 226 #define FTRACE_EVENTS()
 227 #endif
 228
 229 #ifdef CONFIG_TRACING
 230 #define TRACE_PRINTKS()  __start___trace_bprintk_fmt = .;      \
 231                          KEEP(*(__trace_printk_fmt)) /* Trace_printk fmt' pointer */ \
 232                          __stop___trace_bprintk_fmt = .;
 233 #define TRACEPOINT_STR() __start___tracepoint_str = .;  \
 234                          KEEP(*(__tracepoint_str)) /* Trace_printk fmt' pointer */ \
 235                          __stop___tracepoint_str = .;
 236 #else
 237 #define TRACE_PRINTKS()
 238 #define TRACEPOINT_STR()
 239 #endif
 240
 241 #ifdef CONFIG_FTRACE_SYSCALLS
 242 #define TRACE_SYSCALLS() . = ALIGN(8);                                  \
 243                          __start_syscalls_metadata = .;                 \
 244                          KEEP(*(__syscalls_metadata))                   \
 245                          __stop_syscalls_metadata = .;
 246 #else
 247 #define TRACE_SYSCALLS()
 248 #endif
 249
 250 #ifdef CONFIG_BPF_EVENTS
 251 #define BPF_RAW_TP() STRUCT_ALIGN();                                    \
 252                          __start__bpf_raw_tp = .;                       \
 253                          KEEP(*(__bpf_raw_tp_map))                      \
 254                          __stop__bpf_raw_tp = .;
 255 #else
 256 #define BPF_RAW_TP()
 257 #endif
 258
 259 #ifdef CONFIG_SERIAL_EARLYCON
 260 #define EARLYCON_TABLE() . = ALIGN(8);                          \
 261                          __earlycon_table = .;                  \
 262                          KEEP(*(__earlycon_table))              \
 263                          __earlycon_table_end = .;
 264 #else
 265 #define EARLYCON_TABLE()
 266 #endif
 267
 268 #ifdef CONFIG_SECURITY
 269 #define LSM_TABLE()     . = ALIGN(8);                                   \
 270                         __start_lsm_info = .;                           \
 271                         KEEP(*(.lsm_info.init))                         \
 272                         __end_lsm_info = .;
 273 #define EARLY_LSM_TABLE()       . = ALIGN(8);                           \
 274                         __start_early_lsm_info = .;                     \
 275                         KEEP(*(.early_lsm_info.init))                   \
 276                         __end_early_lsm_info = .;
 277 #else
 278 #define LSM_TABLE()
 279 #define EARLY_LSM_TABLE()
 280 #endif
 281
 282 #define ___OF_TABLE(cfg, name)  _OF_TABLE_##cfg(name)
 283 #define __OF_TABLE(cfg, name)   ___OF_TABLE(cfg, name)
 284 #define OF_TABLE(cfg, name)     __OF_TABLE(IS_ENABLED(cfg), name)
 285 #define _OF_TABLE_0(name)
 286 #define _OF_TABLE_1(name)                                               \
 287         . = ALIGN(8);                                                   \
 288         __##name##_of_table = .;                                        \
 289         KEEP(*(__##name##_of_table))                                    \
 290         KEEP(*(__##name##_of_table_end))
 291
 292 #define TIMER_OF_TABLES()       OF_TABLE(CONFIG_TIMER_OF, timer)
 293 #define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip)
 294 #define CLK_OF_TABLES()         OF_TABLE(CONFIG_COMMON_CLK, clk)
 295 #define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem)
 296 #define CPU_METHOD_OF_TABLES()  OF_TABLE(CONFIG_SMP, cpu_method)
 297 #define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method)
 298
 299 #ifdef CONFIG_ACPI
 300 #define ACPI_PROBE_TABLE(name)                                          \
 301         . = ALIGN(8);                                                   \
 302         __##name##_acpi_probe_table = .;                                \
 303         KEEP(*(__##name##_acpi_probe_table))                            \
 304         __##name##_acpi_probe_table_end = .;
 305 #else
 306 #define ACPI_PROBE_TABLE(name)
 307 #endif
 308
 309 #ifdef CONFIG_THERMAL
 310 #define THERMAL_TABLE(name)                                             \
 311         . = ALIGN(8);                                                   \
 312         __##name##_thermal_table = .;                                   \
 313         KEEP(*(__##name##_thermal_table))                               \
 314         __##name##_thermal_table_end = .;
 315 #else
 316 #define THERMAL_TABLE(name)
 317 #endif
 318
 319 #define KERNEL_DTB()                                                    \
 320         STRUCT_ALIGN();                                                 \
 321         __dtb_start = .;                                                \
 322         KEEP(*(.dtb.init.rodata))                                       \
 323         __dtb_end = .;
 324
 325 /*
 326  * .data section
 327  */
 328 #define DATA_DATA                                                       \
 329         *(.xiptext)                                                     \
 330         *(DATA_MAIN)                                                    \
 331         *(.ref.data)                                                    \
 332         *(.data..shared_aligned) /* percpu related */                   \
 333         MEM_KEEP(init.data*)                                            \
 334         MEM_KEEP(exit.data*)                                            \
 335         *(.data.unlikely)                                               \
 336         __start_once = .;                                               \
 337         *(.data.once)                                                   \
 338         __end_once = .;                                                 \
 339         STRUCT_ALIGN();                                                 \
 340         *(__tracepoints)                                                \
 341         /* implement dynamic printk debug */                            \
 342         . = ALIGN(8);                                                   \
 343         __start___dyndbg = .;                                           \
 344         KEEP(*(__dyndbg))                                               \
 345         __stop___dyndbg = .;                                            \
 346         LIKELY_PROFILE()                                                \
 347         BRANCH_PROFILE()                                                \
 348         TRACE_PRINTKS()                                                 \
 349         BPF_RAW_TP()                                                    \
 350         TRACEPOINT_STR()
 351
 352 /*
 353  * Data section helpers
 354  */
 355 #define NOSAVE_DATA                                                     \
 356         . = ALIGN(PAGE_SIZE);                                           \
 357         __nosave_begin = .;                                             \
 358         *(.data..nosave)                                                \
 359         . = ALIGN(PAGE_SIZE);                                           \
 360         __nosave_end = .;
 361
 362 #define PAGE_ALIGNED_DATA(page_align)                                   \
 363         . = ALIGN(page_align);                                          \
 364         *(.data..page_aligned)                                          \
 365         . = ALIGN(page_align);
 366
 367 #define READ_MOSTLY_DATA(align)                                         \
 368         . = ALIGN(align);                                               \
 369         *(.data..read_mostly)                                           \
 370         . = ALIGN(align);
 371
 372 #define CACHELINE_ALIGNED_DATA(align)                                   \
 373         . = ALIGN(align);                                               \
 374         *(.data..cacheline_aligned)
 375
 376 #define INIT_TASK_DATA(align)                                           \
 377         . = ALIGN(align);                                               \
 378         __start_init_task = .;                                          \
 379         init_thread_union = .;                                          \
 380         init_stack = .;                                                 \
 381         KEEP(*(.data..init_task))                                       \
 382         KEEP(*(.data..init_thread_info))                                \
 383         . = __start_init_task + THREAD_SIZE;                            \
 384         __end_init_task = .;
 385
 386 #define JUMP_TABLE_DATA                                                 \
 387         . = ALIGN(8);                                                   \
 388         __start___jump_table = .;                                       \
 389         KEEP(*(__jump_table))                                           \
 390         __stop___jump_table = .;
 391
 392 #define STATIC_CALL_DATA                                                \
 393         . = ALIGN(8);                                                   \
 394         __start_static_call_sites = .;                                  \
 395         KEEP(*(.static_call_sites))                                     \
 396         __stop_static_call_sites = .;
 397
 398 /*
 399  * Allow architectures to handle ro_after_init data on their
 400  * own by defining an empty RO_AFTER_INIT_DATA.
 401  */
 402 #ifndef RO_AFTER_INIT_DATA
 403 #define RO_AFTER_INIT_DATA                                              \
 404         . = ALIGN(8);                                                   \
 405         __start_ro_after_init = .;                                      \
 406         *(.data..ro_after_init)                                         \
 407         JUMP_TABLE_DATA                                                 \
 408         STATIC_CALL_DATA                                                \
 409         __end_ro_after_init = .;
 410 #endif
 411
 412 /*
 413  * Read only Data
 414  */
 415 #define RO_DATA(align)                                                  \
 416         . = ALIGN((align));                                             \
 417         .rodata           : AT(ADDR(.rodata) - LOAD_OFFSET) {           \
 418                 __start_rodata = .;                                     \
 419                 *(.rodata) *(.rodata.*)                                 \
 420                 SCHED_DATA                                              \
 421                 RO_AFTER_INIT_DATA      /* Read only after init */      \
 422                 . = ALIGN(8);                                           \
 423                 __start___tracepoints_ptrs = .;                         \
 424                 KEEP(*(__tracepoints_ptrs)) /* Tracepoints: pointer array */ \
 425                 __stop___tracepoints_ptrs = .;                          \
 426                 *(__tracepoints_strings)/* Tracepoints: strings */      \
 427         }                                                               \
 428                                                                         \
 429         .rodata1          : AT(ADDR(.rodata1) - LOAD_OFFSET) {          \
 430                 *(.rodata1)                                             \
 431         }                                                               \
 432                                                                         \
 433         /* PCI quirks */                                                \
 434         .pci_fixup        : AT(ADDR(.pci_fixup) - LOAD_OFFSET) {        \
 435                 __start_pci_fixups_early = .;                           \
 436                 KEEP(*(.pci_fixup_early))                               \
 437                 __end_pci_fixups_early = .;                             \
 438                 __start_pci_fixups_header = .;                          \
 439                 KEEP(*(.pci_fixup_header))                              \
 440                 __end_pci_fixups_header = .;                            \
 441                 __start_pci_fixups_final = .;                           \
 442                 KEEP(*(.pci_fixup_final))                               \
 443                 __end_pci_fixups_final = .;                             \
 444                 __start_pci_fixups_enable = .;                          \
 445                 KEEP(*(.pci_fixup_enable))                              \
 446                 __end_pci_fixups_enable = .;                            \
 447                 __start_pci_fixups_resume = .;                          \
 448                 KEEP(*(.pci_fixup_resume))                              \
 449                 __end_pci_fixups_resume = .;                            \
 450                 __start_pci_fixups_resume_early = .;                    \
 451                 KEEP(*(.pci_fixup_resume_early))                        \
 452                 __end_pci_fixups_resume_early = .;                      \
 453                 __start_pci_fixups_suspend = .;                         \
 454                 KEEP(*(.pci_fixup_suspend))                             \
 455                 __end_pci_fixups_suspend = .;                           \
 456                 __start_pci_fixups_suspend_late = .;                    \
 457                 KEEP(*(.pci_fixup_suspend_late))                        \
 458                 __end_pci_fixups_suspend_late = .;                      \
 459         }                                                               \
 460                                                                         \
 461         /* Built-in firmware blobs */                                   \
 462         .builtin_fw        : AT(ADDR(.builtin_fw) - LOAD_OFFSET) {      \
 463                 __start_builtin_fw = .;                                 \
 464                 KEEP(*(.builtin_fw))                                    \
 465                 __end_builtin_fw = .;                                   \
 466         }                                                               \
 467                                                                         \
 468         TRACEDATA                                                       \
 469                                                                         \
 470         /* Kernel symbol table: Normal symbols */                       \
 471         __ksymtab         : AT(ADDR(__ksymtab) - LOAD_OFFSET) {         \
 472                 __start___ksymtab = .;                                  \
 473                 KEEP(*(SORT(___ksymtab+*)))                             \
 474                 __stop___ksymtab = .;                                   \
 475         }                                                               \
 476                                                                         \
 477         /* Kernel symbol table: GPL-only symbols */                     \
 478         __ksymtab_gpl     : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) {     \
 479                 __start___ksymtab_gpl = .;                              \
 480                 KEEP(*(SORT(___ksymtab_gpl+*)))                         \
 481                 __stop___ksymtab_gpl = .;                               \
 482         }                                                               \
 483                                                                         \
 484         /* Kernel symbol table: Normal unused symbols */                \
 485         __ksymtab_unused  : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) {  \
 486                 __start___ksymtab_unused = .;                           \
 487                 KEEP(*(SORT(___ksymtab_unused+*)))                      \
 488                 __stop___ksymtab_unused = .;                            \
 489         }                                                               \
 490                                                                         \
 491         /* Kernel symbol table: GPL-only unused symbols */              \
 492         __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
 493                 __start___ksymtab_unused_gpl = .;                       \
 494                 KEEP(*(SORT(___ksymtab_unused_gpl+*)))                  \
 495                 __stop___ksymtab_unused_gpl = .;                        \
 496         }                                                               \
 497                                                                         \
 498         /* Kernel symbol table: GPL-future-only symbols */              \
 499         __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
 500                 __start___ksymtab_gpl_future = .;                       \
 501                 KEEP(*(SORT(___ksymtab_gpl_future+*)))                  \
 502                 __stop___ksymtab_gpl_future = .;                        \
 503         }                                                               \
 504                                                                         \
 505         /* Kernel symbol table: Normal symbols */                       \
 506         __kcrctab         : AT(ADDR(__kcrctab) - LOAD_OFFSET) {         \
 507                 __start___kcrctab = .;                                  \
 508                 KEEP(*(SORT(___kcrctab+*)))                             \
 509                 __stop___kcrctab = .;                                   \
 510         }                                                               \
 511                                                                         \
 512         /* Kernel symbol table: GPL-only symbols */                     \
 513         __kcrctab_gpl     : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) {     \
 514                 __start___kcrctab_gpl = .;                              \
 515                 KEEP(*(SORT(___kcrctab_gpl+*)))                         \
 516                 __stop___kcrctab_gpl = .;                               \
 517         }                                                               \
 518                                                                         \
 519         /* Kernel symbol table: Normal unused symbols */                \
 520         __kcrctab_unused  : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) {  \
 521                 __start___kcrctab_unused = .;                           \
 522                 KEEP(*(SORT(___kcrctab_unused+*)))                      \
 523                 __stop___kcrctab_unused = .;                            \
 524         }                                                               \
 525                                                                         \
 526         /* Kernel symbol table: GPL-only unused symbols */              \
 527         __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
 528                 __start___kcrctab_unused_gpl = .;                       \
 529                 KEEP(*(SORT(___kcrctab_unused_gpl+*)))                  \
 530                 __stop___kcrctab_unused_gpl = .;                        \
 531         }                                                               \
 532                                                                         \
 533         /* Kernel symbol table: GPL-future-only symbols */              \
 534         __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
 535                 __start___kcrctab_gpl_future = .;                       \
 536                 KEEP(*(SORT(___kcrctab_gpl_future+*)))                  \
 537                 __stop___kcrctab_gpl_future = .;                        \
 538         }                                                               \
 539                                                                         \
 540         /* Kernel symbol table: strings */                              \
 541         __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
 542                 *(__ksymtab_strings)                                    \
 543         }                                                               \
 544                                                                         \
 545         /* __*init sections */                                          \
 546         __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) {         \
 547                 *(.ref.rodata)                                          \
 548                 MEM_KEEP(init.rodata)                                   \
 549                 MEM_KEEP(exit.rodata)                                   \
 550         }                                                               \
 551                                                                         \
 552         /* Built-in module parameters. */                               \
 553         __param : AT(ADDR(__param) - LOAD_OFFSET) {                     \
 554                 __start___param = .;                                    \
 555                 KEEP(*(__param))                                        \
 556                 __stop___param = .;                                     \
 557         }                                                               \
 558                                                                         \
 559         /* Built-in module versions. */                                 \
 560         __modver : AT(ADDR(__modver) - LOAD_OFFSET) {                   \
 561                 __start___modver = .;                                   \
 562                 KEEP(*(__modver))                                       \
 563                 __stop___modver = .;                                    \
 564         }                                                               \
 565                                                                         \
 566         RO_EXCEPTION_TABLE                                              \
 567         NOTES                                                           \
 568         BTF                                                             \
 569                                                                         \
 570         . = ALIGN((align));                                             \
 571         __end_rodata = .;
 572
 573 /*
 574  * Non-instrumentable text section
 575  */
 576 #define NOINSTR_TEXT                                                    \
 577                 ALIGN_FUNCTION();                                       \
 578                 __noinstr_text_start = .;                               \
 579                 *(.noinstr.text)                                        \
 580                 __noinstr_text_end = .;
 581
 582 /*
 583  * .text section. Map to function alignment to avoid address changes
 584  * during second ld run in second ld pass when generating System.map
 585  *
 586  * TEXT_MAIN here will match .text.fixup and .text.unlikely if dead
 587  * code elimination is enabled, so these sections should be converted
 588  * to use ".." first.
 589  */
 590 #define TEXT_TEXT                                                       \
 591                 ALIGN_FUNCTION();                                       \
 592                 *(.text.hot .text.hot.*)                                \
 593                 *(TEXT_MAIN .text.fixup)                                \
 594                 *(.text.unlikely .text.unlikely.*)                      \
 595                 *(.text.unknown .text.unknown.*)                        \
 596                 NOINSTR_TEXT                                            \
 597                 *(.text..refcount)                                      \
 598                 *(.ref.text)                                            \
 599         MEM_KEEP(init.text*)                                            \
 600         MEM_KEEP(exit.text*)                                            \
 601
 602
 603 /* sched.text is aling to function alignment to secure we have same
 604  * address even at second ld pass when generating System.map */
 605 #define SCHED_TEXT                                                      \
 606                 ALIGN_FUNCTION();                                       \
 607                 __sched_text_start = .;                                 \
 608                 *(.sched.text)                                          \
 609                 __sched_text_end = .;
 610
 611 /* spinlock.text is aling to function alignment to secure we have same
 612  * address even at second ld pass when generating System.map */
 613 #define LOCK_TEXT                                                       \
 614                 ALIGN_FUNCTION();                                       \
 615                 __lock_text_start = .;                                  \
 616                 *(.spinlock.text)                                       \
 617                 __lock_text_end = .;
 618
 619 #define CPUIDLE_TEXT                                                    \
 620                 ALIGN_FUNCTION();                                       \
 621                 __cpuidle_text_start = .;                               \
 622                 *(.cpuidle.text)                                        \
 623                 __cpuidle_text_end = .;
 624
 625 #define KPROBES_TEXT                                                    \
 626                 ALIGN_FUNCTION();                                       \
 627                 __kprobes_text_start = .;                               \
 628                 *(.kprobes.text)                                        \
 629                 __kprobes_text_end = .;
 630
 631 #define ENTRY_TEXT                                                      \
 632                 ALIGN_FUNCTION();                                       \
 633                 __entry_text_start = .;                                 \
 634                 *(.entry.text)                                          \
 635                 __entry_text_end = .;
 636
 637 #define IRQENTRY_TEXT                                                   \
 638                 ALIGN_FUNCTION();                                       \
 639                 __irqentry_text_start = .;                              \
 640                 *(.irqentry.text)                                       \
 641                 __irqentry_text_end = .;
 642
 643 #define SOFTIRQENTRY_TEXT                                               \
 644                 ALIGN_FUNCTION();                                       \
 645                 __softirqentry_text_start = .;                          \
 646                 *(.softirqentry.text)                                   \
 647                 __softirqentry_text_end = .;
 648
 649 #define STATIC_CALL_TEXT                                                \
 650                 ALIGN_FUNCTION();                                       \
 651                 __static_call_text_start = .;                           \
 652                 *(.static_call.text)                                    \
 653                 __static_call_text_end = .;
 654
 655 /* Section used for early init (in .S files) */
 656 #define HEAD_TEXT  KEEP(*(.head.text))
 657
 658 #define HEAD_TEXT_SECTION                                                       \
 659         .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) {               \
 660                 HEAD_TEXT                                               \
 661         }
 662
 663 /*
 664  * Exception table
 665  */
 666 #define EXCEPTION_TABLE(align)                                          \
 667         . = ALIGN(align);                                               \
 668         __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {               \
 669                 __start___ex_table = .;                                 \
 670                 KEEP(*(__ex_table))                                     \
 671                 __stop___ex_table = .;                                  \
 672         }
 673
 674 /*
 675  * .BTF
 676  */
 677 #ifdef CONFIG_DEBUG_INFO_BTF
 678 #define BTF                                                             \
 679         .BTF : AT(ADDR(.BTF) - LOAD_OFFSET) {                           \
 680                 __start_BTF = .;                                        \
 681                 KEEP(*(.BTF))                                           \
 682                 __stop_BTF = .;                                         \
 683         }                                                               \
 684         . = ALIGN(4);                                                   \
 685         .BTF_ids : AT(ADDR(.BTF_ids) - LOAD_OFFSET) {                   \
 686                 *(.BTF_ids)                                             \
 687         }
 688 #else
 689 #define BTF
 690 #endif
 691
 692 /*
 693  * Init task
 694  */
 695 #define INIT_TASK_DATA_SECTION(align)                                   \
 696         . = ALIGN(align);                                               \
 697         .data..init_task :  AT(ADDR(.data..init_task) - LOAD_OFFSET) {  \
 698                 INIT_TASK_DATA(align)                                   \
 699         }
 700
 701 #ifdef CONFIG_CONSTRUCTORS
 702 #define KERNEL_CTORS()  . = ALIGN(8);                      \
 703                         __ctors_start = .;                 \
 704                         KEEP(*(SORT(.ctors.*)))            \
 705                         KEEP(*(.ctors))                    \
 706                         KEEP(*(SORT(.init_array.*)))       \
 707                         KEEP(*(.init_array))               \
 708                         __ctors_end = .;
 709 #else
 710 #define KERNEL_CTORS()
 711 #endif
 712
 713 /* init and exit section handling */
 714 #define INIT_DATA                                                       \
 715         KEEP(*(SORT(___kentry+*)))                                      \
 716         *(.init.data init.data.*)                                       \
 717         MEM_DISCARD(init.data*)                                         \
 718         KERNEL_CTORS()                                                  \
 719         MCOUNT_REC()                                                    \
 720         *(.init.rodata .init.rodata.*)                                  \
 721         FTRACE_EVENTS()                                                 \
 722         TRACE_SYSCALLS()                                                \
 723         KPROBE_BLACKLIST()                                              \
 724         ERROR_INJECT_WHITELIST()                                        \
 725         MEM_DISCARD(init.rodata)                                        \
 726         CLK_OF_TABLES()                                                 \
 727         RESERVEDMEM_OF_TABLES()                                         \
 728         TIMER_OF_TABLES()                                               \
 729         CPU_METHOD_OF_TABLES()                                          \
 730         CPUIDLE_METHOD_OF_TABLES()                                      \
 731         KERNEL_DTB()                                                    \
 732         IRQCHIP_OF_MATCH_TABLE()                                        \
 733         ACPI_PROBE_TABLE(irqchip)                                       \
 734         ACPI_PROBE_TABLE(timer)                                         \
 735         THERMAL_TABLE(governor)                                         \
 736         EARLYCON_TABLE()                                                \
 737         LSM_TABLE()                                                     \
 738         EARLY_LSM_TABLE()                                               \
 739         KUNIT_TABLE()
 740
 741 #define INIT_TEXT                                                       \
 742         *(.init.text .init.text.*)                                      \
 743         *(.text.startup)                                                \
 744         MEM_DISCARD(init.text*)
 745
 746 #define EXIT_DATA                                                       \
 747         *(.exit.data .exit.data.*)                                      \
 748         *(.fini_array .fini_array.*)                                    \
 749         *(.dtors .dtors.*)                                              \
 750         MEM_DISCARD(exit.data*)                                         \
 751         MEM_DISCARD(exit.rodata*)
 752
 753 #define EXIT_TEXT                                                       \
 754         *(.exit.text)                                                   \
 755         *(.text.exit)                                                   \
 756         MEM_DISCARD(exit.text)
 757
 758 #define EXIT_CALL                                                       \
 759         *(.exitcall.exit)
 760
 761 /*
 762  * bss (Block Started by Symbol) - uninitialized data
 763  * zeroed during startup
 764  */
 765 #define SBSS(sbss_align)                                                \
 766         . = ALIGN(sbss_align);                                          \
 767         .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) {                         \
 768                 *(.dynsbss)                                             \
 769                 *(SBSS_MAIN)                                            \
 770                 *(.scommon)                                             \
 771         }
 772
 773 /*
 774  * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra
 775  * sections to the front of bss.
 776  */
 777 #ifndef BSS_FIRST_SECTIONS
 778 #define BSS_FIRST_SECTIONS
 779 #endif
 780
 781 #define BSS(bss_align)                                                  \
 782         . = ALIGN(bss_align);                                           \
 783         .bss : AT(ADDR(.bss) - LOAD_OFFSET) {                           \
 784                 BSS_FIRST_SECTIONS                                      \
 785                 . = ALIGN(PAGE_SIZE);                                   \
 786                 *(.bss..page_aligned)                                   \
 787                 . = ALIGN(PAGE_SIZE);                                   \
 788                 *(.dynbss)                                              \
 789                 *(BSS_MAIN)                                             \
 790                 *(COMMON)                                               \
 791         }
 792
 793 /*
 794  * DWARF debug sections.
 795  * Symbols in the DWARF debugging sections are relative to
 796  * the beginning of the section so we begin them at 0.
 797  */
 798 #define DWARF_DEBUG                                                     \
 799                 /* DWARF 1 */                                           \
 800                 .debug          0 : { *(.debug) }                       \
 801                 .line           0 : { *(.line) }                        \
 802                 /* GNU DWARF 1 extensions */                            \
 803                 .debug_srcinfo  0 : { *(.debug_srcinfo) }               \
 804                 .debug_sfnames  0 : { *(.debug_sfnames) }               \
 805                 /* DWARF 1.1 and DWARF 2 */                             \
 806                 .debug_aranges  0 : { *(.debug_aranges) }               \
 807                 .debug_pubnames 0 : { *(.debug_pubnames) }              \
 808                 /* DWARF 2 */                                           \
 809                 .debug_info     0 : { *(.debug_info                     \
 810                                 .gnu.linkonce.wi.*) }                   \
 811                 .debug_abbrev   0 : { *(.debug_abbrev) }                \
 812                 .debug_line     0 : { *(.debug_line) }                  \
 813                 .debug_frame    0 : { *(.debug_frame) }                 \
 814                 .debug_str      0 : { *(.debug_str) }                   \
 815                 .debug_loc      0 : { *(.debug_loc) }                   \
 816                 .debug_macinfo  0 : { *(.debug_macinfo) }               \
 817                 .debug_pubtypes 0 : { *(.debug_pubtypes) }              \
 818                 /* DWARF 3 */                                           \
 819                 .debug_ranges   0 : { *(.debug_ranges) }                \
 820                 /* SGI/MIPS DWARF 2 extensions */                       \
 821                 .debug_weaknames 0 : { *(.debug_weaknames) }            \
 822                 .debug_funcnames 0 : { *(.debug_funcnames) }            \
 823                 .debug_typenames 0 : { *(.debug_typenames) }            \
 824                 .debug_varnames  0 : { *(.debug_varnames) }             \
 825                 /* GNU DWARF 2 extensions */                            \
 826                 .debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) }      \
 827                 .debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) }      \
 828                 /* DWARF 4 */                                           \
 829                 .debug_types    0 : { *(.debug_types) }                 \
 830                 /* DWARF 5 */                                           \
 831                 .debug_macro    0 : { *(.debug_macro) }                 \
 832                 .debug_addr     0 : { *(.debug_addr) }
 833
 834 /* Stabs debugging sections. */
 835 #define STABS_DEBUG                                                     \
 836                 .stab 0 : { *(.stab) }                                  \
 837                 .stabstr 0 : { *(.stabstr) }                            \
 838                 .stab.excl 0 : { *(.stab.excl) }                        \
 839                 .stab.exclstr 0 : { *(.stab.exclstr) }                  \
 840                 .stab.index 0 : { *(.stab.index) }                      \
 841                 .stab.indexstr 0 : { *(.stab.indexstr) }
 842
 843 /* Required sections not related to debugging. */
 844 #define ELF_DETAILS                                                     \
 845                 .comment 0 : { *(.comment) }                            \
 846                 .symtab 0 : { *(.symtab) }                              \
 847                 .strtab 0 : { *(.strtab) }                              \
 848                 .shstrtab 0 : { *(.shstrtab) }
 849
 850 #ifdef CONFIG_GENERIC_BUG
 851 #define BUG_TABLE                                                       \
 852         . = ALIGN(8);                                                   \
 853         __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) {             \
 854                 __start___bug_table = .;                                \
 855                 KEEP(*(__bug_table))                                    \
 856                 __stop___bug_table = .;                                 \
 857         }
 858 #else
 859 #define BUG_TABLE
 860 #endif
 861
 862 #ifdef CONFIG_UNWINDER_ORC
 863 #define ORC_UNWIND_TABLE                                                \
 864         . = ALIGN(4);                                                   \
 865         .orc_unwind_ip : AT(ADDR(.orc_unwind_ip) - LOAD_OFFSET) {       \
 866                 __start_orc_unwind_ip = .;                              \
 867                 KEEP(*(.orc_unwind_ip))                                 \
 868                 __stop_orc_unwind_ip = .;                               \
 869         }                                                               \
 870         . = ALIGN(2);                                                   \
 871         .orc_unwind : AT(ADDR(.orc_unwind) - LOAD_OFFSET) {             \
 872                 __start_orc_unwind = .;                                 \
 873                 KEEP(*(.orc_unwind))                                    \
 874                 __stop_orc_unwind = .;                                  \
 875         }                                                               \
 876         . = ALIGN(4);                                                   \
 877         .orc_lookup : AT(ADDR(.orc_lookup) - LOAD_OFFSET) {             \
 878                 orc_lookup = .;                                         \
 879                 . += (((SIZEOF(.text) + LOOKUP_BLOCK_SIZE - 1) /        \
 880                         LOOKUP_BLOCK_SIZE) + 1) * 4;                    \
 881                 orc_lookup_end = .;                                     \
 882         }
 883 #else
 884 #define ORC_UNWIND_TABLE
 885 #endif
 886
 887 #ifdef CONFIG_PM_TRACE
 888 #define TRACEDATA                                                       \
 889         . = ALIGN(4);                                                   \
 890         .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) {               \
 891                 __tracedata_start = .;                                  \
 892                 KEEP(*(.tracedata))                                     \
 893                 __tracedata_end = .;                                    \
 894         }
 895 #else
 896 #define TRACEDATA
 897 #endif
 898
 899 #define NOTES                                                           \
 900         .notes : AT(ADDR(.notes) - LOAD_OFFSET) {                       \
 901                 __start_notes = .;                                      \
 902                 KEEP(*(.note.*))                                        \
 903                 __stop_notes = .;                                       \
 904         } NOTES_HEADERS                                                 \
 905         NOTES_HEADERS_RESTORE
 906
 907 #define INIT_SETUP(initsetup_align)                                     \
 908                 . = ALIGN(initsetup_align);                             \
 909                 __setup_start = .;                                      \
 910                 KEEP(*(.init.setup))                                    \
 911                 __setup_end = .;
 912
 913 #define INIT_CALLS_LEVEL(level)                                         \
 914                 __initcall##level##_start = .;                          \
 915                 KEEP(*(.initcall##level##.init))                        \
 916                 KEEP(*(.initcall##level##s.init))                       \
 917
 918 #define INIT_CALLS                                                      \
 919                 __initcall_start = .;                                   \
 920                 KEEP(*(.initcallearly.init))                            \
 921                 INIT_CALLS_LEVEL(0)                                     \
 922                 INIT_CALLS_LEVEL(1)                                     \
 923                 INIT_CALLS_LEVEL(2)                                     \
 924                 INIT_CALLS_LEVEL(3)                                     \
 925                 INIT_CALLS_LEVEL(4)                                     \
 926                 INIT_CALLS_LEVEL(5)                                     \
 927                 INIT_CALLS_LEVEL(rootfs)                                \
 928                 INIT_CALLS_LEVEL(6)                                     \
 929                 INIT_CALLS_LEVEL(7)                                     \
 930                 __initcall_end = .;
 931
 932 #define CON_INITCALL                                                    \
 933                 __con_initcall_start = .;                               \
 934                 KEEP(*(.con_initcall.init))                             \
 935                 __con_initcall_end = .;
 936
 937 /* Alignment must be consistent with (kunit_suite *) in include/kunit/test.h */
 938 #define KUNIT_TABLE()                                                   \
 939                 . = ALIGN(8);                                           \
 940                 __kunit_suites_start = .;                               \
 941                 KEEP(*(.kunit_test_suites))                             \
 942                 __kunit_suites_end = .;
 943
 944 #ifdef CONFIG_BLK_DEV_INITRD
 945 #define INIT_RAM_FS                                                     \
 946         . = ALIGN(4);                                                   \
 947         __initramfs_start = .;                                          \
 948         KEEP(*(.init.ramfs))                                            \
 949         . = ALIGN(8);                                                   \
 950         KEEP(*(.init.ramfs.info))
 951 #else
 952 #define INIT_RAM_FS
 953 #endif
 954
 955 /*
 956  * Memory encryption operates on a page basis. Since we need to clear
 957  * the memory encryption mask for this section, it needs to be aligned
 958  * on a page boundary and be a page-size multiple in length.
 959  *
 960  * Note: We use a separate section so that only this section gets
 961  * decrypted to avoid exposing more than we wish.
 962  */
 963 #ifdef CONFIG_AMD_MEM_ENCRYPT
 964 #define PERCPU_DECRYPTED_SECTION                                        \
 965         . = ALIGN(PAGE_SIZE);                                           \
 966         *(.data..percpu..decrypted)                                     \
 967         . = ALIGN(PAGE_SIZE);
 968 #else
 969 #define PERCPU_DECRYPTED_SECTION
 970 #endif
 971
 972
 973 /*
 974  * Default discarded sections.
 975  *
 976  * Some archs want to discard exit text/data at runtime rather than
 977  * link time due to cross-section references such as alt instructions,
 978  * bug table, eh_frame, etc.  DISCARDS must be the last of output
 979  * section definitions so that such archs put those in earlier section
 980  * definitions.
 981  */
 982 #ifdef RUNTIME_DISCARD_EXIT
 983 #define EXIT_DISCARDS
 984 #else
 985 #define EXIT_DISCARDS                                                   \
 986         EXIT_TEXT                                                       \
 987         EXIT_DATA
 988 #endif
 989
 990 /*
 991  * Clang's -fsanitize=kernel-address and -fsanitize=thread produce
 992  * unwanted sections (.eh_frame and .init_array.*), but
 993  * CONFIG_CONSTRUCTORS wants to keep any .init_array.* sections.
 994  * https://bugs.llvm.org/show_bug.cgi?id=46478
 995  */
 996 #if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KCSAN)
 997 # ifdef CONFIG_CONSTRUCTORS
 998 #  define SANITIZER_DISCARDS                                            \
 999         *(.eh_frame)
1000 # else
1001 #  define SANITIZER_DISCARDS                                            \
1002         *(.init_array) *(.init_array.*)                                 \
1003         *(.eh_frame)
1004 # endif
1005 #else
1006 # define SANITIZER_DISCARDS
1007 #endif
1008
1009 #define COMMON_DISCARDS                                                 \
1010         SANITIZER_DISCARDS                                              \
1011         *(.discard)                                                     \
1012         *(.discard.*)                                                   \
1013         *(.modinfo)                                                     \
1014         /* ld.bfd warns about .gnu.version* even when not emitted */    \
1015         *(.gnu.version*)                                                \
1016
1017 #define DISCARDS                                                        \
1018         /DISCARD/ : {                                                   \
1019         EXIT_DISCARDS                                                   \
1020         EXIT_CALL                                                       \
1021         COMMON_DISCARDS                                                 \
1022         }
1023
1024 /**
1025  * PERCPU_INPUT - the percpu input sections
1026  * @cacheline: cacheline size
1027  *
1028  * The core percpu section names and core symbols which do not rely
1029  * directly upon load addresses.
1030  *
1031  * @cacheline is used to align subsections to avoid false cacheline
1032  * sharing between subsections for different purposes.
1033  */
1034 #define PERCPU_INPUT(cacheline)                                         \
1035         __per_cpu_start = .;                                            \
1036         *(.data..percpu..first)                                         \
1037         . = ALIGN(PAGE_SIZE);                                           \
1038         *(.data..percpu..page_aligned)                                  \
1039         . = ALIGN(cacheline);                                           \
1040         *(.data..percpu..read_mostly)                                   \
1041         . = ALIGN(cacheline);                                           \
1042         *(.data..percpu)                                                \
1043         *(.data..percpu..shared_aligned)                                \
1044         PERCPU_DECRYPTED_SECTION                                        \
1045         __per_cpu_end = .;
1046
1047 /**
1048  * PERCPU_VADDR - define output section for percpu area
1049  * @cacheline: cacheline size
1050  * @vaddr: explicit base address (optional)
1051  * @phdr: destination PHDR (optional)
1052  *
1053  * Macro which expands to output section for percpu area.
1054  *
1055  * @cacheline is used to align subsections to avoid false cacheline
1056  * sharing between subsections for different purposes.
1057  *
1058  * If @vaddr is not blank, it specifies explicit base address and all
1059  * percpu symbols will be offset from the given address.  If blank,
1060  * @vaddr always equals @laddr + LOAD_OFFSET.
1061  *
1062  * @phdr defines the output PHDR to use if not blank.  Be warned that
1063  * output PHDR is sticky.  If @phdr is specified, the next output
1064  * section in the linker script will go there too.  @phdr should have
1065  * a leading colon.
1066  *
1067  * Note that this macros defines __per_cpu_load as an absolute symbol.
1068  * If there is no need to put the percpu section at a predetermined
1069  * address, use PERCPU_SECTION.
1070  */
1071 #define PERCPU_VADDR(cacheline, vaddr, phdr)                            \
1072         __per_cpu_load = .;                                             \
1073         .data..percpu vaddr : AT(__per_cpu_load - LOAD_OFFSET) {        \
1074                 PERCPU_INPUT(cacheline)                                 \
1075         } phdr                                                          \
1076         . = __per_cpu_load + SIZEOF(.data..percpu);
1077
1078 /**
1079  * PERCPU_SECTION - define output section for percpu area, simple version
1080  * @cacheline: cacheline size
1081  *
1082  * Align to PAGE_SIZE and outputs output section for percpu area.  This
1083  * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and
1084  * __per_cpu_start will be identical.
1085  *
1086  * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,)
1087  * except that __per_cpu_load is defined as a relative symbol against
1088  * .data..percpu which is required for relocatable x86_32 configuration.
1089  */
1090 #define PERCPU_SECTION(cacheline)                                       \
1091         . = ALIGN(PAGE_SIZE);                                           \
1092         .data..percpu   : AT(ADDR(.data..percpu) - LOAD_OFFSET) {       \
1093                 __per_cpu_load = .;                                     \
1094                 PERCPU_INPUT(cacheline)                                 \
1095         }
1096
1097
1098 /*
1099  * Definition of the high level *_SECTION macros
1100  * They will fit only a subset of the architectures
1101  */
1102
1103
1104 /*
1105  * Writeable data.
1106  * All sections are combined in a single .data section.
1107  * The sections following CONSTRUCTORS are arranged so their
1108  * typical alignment matches.
1109  * A cacheline is typical/always less than a PAGE_SIZE so
1110  * the sections that has this restriction (or similar)
1111  * is located before the ones requiring PAGE_SIZE alignment.
1112  * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
1113  * matches the requirement of PAGE_ALIGNED_DATA.
1114  *
1115  * use 0 as page_align if page_aligned data is not used */
1116 #define RW_DATA(cacheline, pagealigned, inittask)                       \
1117         . = ALIGN(PAGE_SIZE);                                           \
1118         .data : AT(ADDR(.data) - LOAD_OFFSET) {                         \
1119                 INIT_TASK_DATA(inittask)                                \
1120                 NOSAVE_DATA                                             \
1121                 PAGE_ALIGNED_DATA(pagealigned)                          \
1122                 CACHELINE_ALIGNED_DATA(cacheline)                       \
1123                 READ_MOSTLY_DATA(cacheline)                             \
1124                 DATA_DATA                                               \
1125                 CONSTRUCTORS                                            \
1126         }                                                               \
1127         BUG_TABLE                                                       \
1128
1129 #define INIT_TEXT_SECTION(inittext_align)                               \
1130         . = ALIGN(inittext_align);                                      \
1131         .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {               \
1132                 _sinittext = .;                                         \
1133                 INIT_TEXT                                               \
1134                 _einittext = .;                                         \
1135         }
1136
1137 #define INIT_DATA_SECTION(initsetup_align)                              \
1138         .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {               \
1139                 INIT_DATA                                               \
1140                 INIT_SETUP(initsetup_align)                             \
1141                 INIT_CALLS                                              \
1142                 CON_INITCALL                                            \
1143                 INIT_RAM_FS                                             \
1144         }
1145
1146 #define BSS_SECTION(sbss_align, bss_align, stop_align)                  \
1147         . = ALIGN(sbss_align);                                          \
1148         __bss_start = .;                                                \
1149         SBSS(sbss_align)                                                \
1150         BSS(bss_align)                                                  \
1151         . = ALIGN(stop_align);                                          \
1152         __bss_stop = .;