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  * With LTO_CLANG, the linker also splits sections by default, so we need
  94  * these macros to combine the sections during the final link.
  95  *
  96  * RODATA_MAIN is not used because existing code already defines .rodata.x
  97  * sections to be brought in with rodata.
  98  */
  99 #if defined(CONFIG_LD_DEAD_CODE_DATA_ELIMINATION) || defined(CONFIG_LTO_CLANG)
 100 #define TEXT_MAIN .text .text.[0-9a-zA-Z_]*
 101 #define DATA_MAIN .data .data.[0-9a-zA-Z_]* .data..L* .data..compoundliteral* .data.$__unnamed_* .data.$L*
 102 #define SDATA_MAIN .sdata .sdata.[0-9a-zA-Z_]*
 103 #define RODATA_MAIN .rodata .rodata.[0-9a-zA-Z_]* .rodata..L*
 104 #define BSS_MAIN .bss .bss.[0-9a-zA-Z_]* .bss..compoundliteral*
 105 #define SBSS_MAIN .sbss .sbss.[0-9a-zA-Z_]*
 106 #else
 107 #define TEXT_MAIN .text
 108 #define DATA_MAIN .data
 109 #define SDATA_MAIN .sdata
 110 #define RODATA_MAIN .rodata
 111 #define BSS_MAIN .bss
 112 #define SBSS_MAIN .sbss
 113 #endif
 114
 115 /*
 116  * GCC 4.5 and later have a 32 bytes section alignment for structures.
 117  * Except GCC 4.9, that feels the need to align on 64 bytes.
 118  */
 119 #if __GNUC__ == 4 && __GNUC_MINOR__ == 9
 120 #define STRUCT_ALIGNMENT 64
 121 #else
 122 #define STRUCT_ALIGNMENT 32
 123 #endif
 124 #define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT)
 125
 126 /*
 127  * The order of the sched class addresses are important, as they are
 128  * used to determine the order of the priority of each sched class in
 129  * relation to each other.
 130  */
 131 #define SCHED_DATA                              \
 132         STRUCT_ALIGN();                         \
 133         __begin_sched_classes = .;              \
 134         *(__idle_sched_class)                   \
 135         *(__fair_sched_class)                   \
 136         *(__rt_sched_class)                     \
 137         *(__dl_sched_class)                     \
 138         *(__stop_sched_class)                   \
 139         __end_sched_classes = .;
 140
 141 /* The actual configuration determine if the init/exit sections
 142  * are handled as text/data or they can be discarded (which
 143  * often happens at runtime)
 144  */
 145 #ifdef CONFIG_HOTPLUG_CPU
 146 #define CPU_KEEP(sec)    *(.cpu##sec)
 147 #define CPU_DISCARD(sec)
 148 #else
 149 #define CPU_KEEP(sec)
 150 #define CPU_DISCARD(sec) *(.cpu##sec)
 151 #endif
 152
 153 #if defined(CONFIG_MEMORY_HOTPLUG)
 154 #define MEM_KEEP(sec)    *(.mem##sec)
 155 #define MEM_DISCARD(sec)
 156 #else
 157 #define MEM_KEEP(sec)
 158 #define MEM_DISCARD(sec) *(.mem##sec)
 159 #endif
 160
 161 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
 162 /*
 163  * The ftrace call sites are logged to a section whose name depends on the
 164  * compiler option used. A given kernel image will only use one, AKA
 165  * FTRACE_CALLSITE_SECTION. We capture all of them here to avoid header
 166  * dependencies for FTRACE_CALLSITE_SECTION's definition.
 167  *
 168  * Need to also make ftrace_stub_graph point to ftrace_stub
 169  * so that the same stub location may have different protocols
 170  * and not mess up with C verifiers.
 171  */
 172 #define MCOUNT_REC()    . = ALIGN(8);                           \
 173                         __start_mcount_loc = .;                 \
 174                         KEEP(*(__mcount_loc))                   \
 175                         KEEP(*(__patchable_function_entries))   \
 176                         __stop_mcount_loc = .;                  \
 177                         ftrace_stub_graph = ftrace_stub;
 178 #else
 179 # ifdef CONFIG_FUNCTION_TRACER
 180 #  define MCOUNT_REC()  ftrace_stub_graph = ftrace_stub;
 181 # else
 182 #  define MCOUNT_REC()
 183 # endif
 184 #endif
 185
 186 #ifdef CONFIG_TRACE_BRANCH_PROFILING
 187 #define LIKELY_PROFILE()        __start_annotated_branch_profile = .;   \
 188                                 KEEP(*(_ftrace_annotated_branch))       \
 189                                 __stop_annotated_branch_profile = .;
 190 #else
 191 #define LIKELY_PROFILE()
 192 #endif
 193
 194 #ifdef CONFIG_PROFILE_ALL_BRANCHES
 195 #define BRANCH_PROFILE()        __start_branch_profile = .;             \
 196                                 KEEP(*(_ftrace_branch))                 \
 197                                 __stop_branch_profile = .;
 198 #else
 199 #define BRANCH_PROFILE()
 200 #endif
 201
 202 #ifdef CONFIG_KPROBES
 203 #define KPROBE_BLACKLIST()      . = ALIGN(8);                                 \
 204                                 __start_kprobe_blacklist = .;                 \
 205                                 KEEP(*(_kprobe_blacklist))                    \
 206                                 __stop_kprobe_blacklist = .;
 207 #else
 208 #define KPROBE_BLACKLIST()
 209 #endif
 210
 211 #ifdef CONFIG_FUNCTION_ERROR_INJECTION
 212 #define ERROR_INJECT_WHITELIST()        STRUCT_ALIGN();                       \
 213                         __start_error_injection_whitelist = .;                \
 214                         KEEP(*(_error_injection_whitelist))                   \
 215                         __stop_error_injection_whitelist = .;
 216 #else
 217 #define ERROR_INJECT_WHITELIST()
 218 #endif
 219
 220 #ifdef CONFIG_EVENT_TRACING
 221 #define FTRACE_EVENTS() . = ALIGN(8);                                   \
 222                         __start_ftrace_events = .;                      \
 223                         KEEP(*(_ftrace_events))                         \
 224                         __stop_ftrace_events = .;                       \
 225                         __start_ftrace_eval_maps = .;                   \
 226                         KEEP(*(_ftrace_eval_map))                       \
 227                         __stop_ftrace_eval_maps = .;
 228 #else
 229 #define FTRACE_EVENTS()
 230 #endif
 231
 232 #ifdef CONFIG_TRACING
 233 #define TRACE_PRINTKS()  __start___trace_bprintk_fmt = .;      \
 234                          KEEP(*(__trace_printk_fmt)) /* Trace_printk fmt' pointer */ \
 235                          __stop___trace_bprintk_fmt = .;
 236 #define TRACEPOINT_STR() __start___tracepoint_str = .;  \
 237                          KEEP(*(__tracepoint_str)) /* Trace_printk fmt' pointer */ \
 238                          __stop___tracepoint_str = .;
 239 #else
 240 #define TRACE_PRINTKS()
 241 #define TRACEPOINT_STR()
 242 #endif
 243
 244 #ifdef CONFIG_FTRACE_SYSCALLS
 245 #define TRACE_SYSCALLS() . = ALIGN(8);                                  \
 246                          __start_syscalls_metadata = .;                 \
 247                          KEEP(*(__syscalls_metadata))                   \
 248                          __stop_syscalls_metadata = .;
 249 #else
 250 #define TRACE_SYSCALLS()
 251 #endif
 252
 253 #ifdef CONFIG_BPF_EVENTS
 254 #define BPF_RAW_TP() STRUCT_ALIGN();                                    \
 255                          __start__bpf_raw_tp = .;                       \
 256                          KEEP(*(__bpf_raw_tp_map))                      \
 257                          __stop__bpf_raw_tp = .;
 258 #else
 259 #define BPF_RAW_TP()
 260 #endif
 261
 262 #ifdef CONFIG_SERIAL_EARLYCON
 263 #define EARLYCON_TABLE() . = ALIGN(8);                          \
 264                          __earlycon_table = .;                  \
 265                          KEEP(*(__earlycon_table))              \
 266                          __earlycon_table_end = .;
 267 #else
 268 #define EARLYCON_TABLE()
 269 #endif
 270
 271 #ifdef CONFIG_SECURITY
 272 #define LSM_TABLE()     . = ALIGN(8);                                   \
 273                         __start_lsm_info = .;                           \
 274                         KEEP(*(.lsm_info.init))                         \
 275                         __end_lsm_info = .;
 276 #define EARLY_LSM_TABLE()       . = ALIGN(8);                           \
 277                         __start_early_lsm_info = .;                     \
 278                         KEEP(*(.early_lsm_info.init))                   \
 279                         __end_early_lsm_info = .;
 280 #else
 281 #define LSM_TABLE()
 282 #define EARLY_LSM_TABLE()
 283 #endif
 284
 285 #define ___OF_TABLE(cfg, name)  _OF_TABLE_##cfg(name)
 286 #define __OF_TABLE(cfg, name)   ___OF_TABLE(cfg, name)
 287 #define OF_TABLE(cfg, name)     __OF_TABLE(IS_ENABLED(cfg), name)
 288 #define _OF_TABLE_0(name)
 289 #define _OF_TABLE_1(name)                                               \
 290         . = ALIGN(8);                                                   \
 291         __##name##_of_table = .;                                        \
 292         KEEP(*(__##name##_of_table))                                    \
 293         KEEP(*(__##name##_of_table_end))
 294
 295 #define TIMER_OF_TABLES()       OF_TABLE(CONFIG_TIMER_OF, timer)
 296 #define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip)
 297 #define CLK_OF_TABLES()         OF_TABLE(CONFIG_COMMON_CLK, clk)
 298 #define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem)
 299 #define CPU_METHOD_OF_TABLES()  OF_TABLE(CONFIG_SMP, cpu_method)
 300 #define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method)
 301
 302 #ifdef CONFIG_ACPI
 303 #define ACPI_PROBE_TABLE(name)                                          \
 304         . = ALIGN(8);                                                   \
 305         __##name##_acpi_probe_table = .;                                \
 306         KEEP(*(__##name##_acpi_probe_table))                            \
 307         __##name##_acpi_probe_table_end = .;
 308 #else
 309 #define ACPI_PROBE_TABLE(name)
 310 #endif
 311
 312 #ifdef CONFIG_THERMAL
 313 #define THERMAL_TABLE(name)                                             \
 314         . = ALIGN(8);                                                   \
 315         __##name##_thermal_table = .;                                   \
 316         KEEP(*(__##name##_thermal_table))                               \
 317         __##name##_thermal_table_end = .;
 318 #else
 319 #define THERMAL_TABLE(name)
 320 #endif
 321
 322 #ifdef CONFIG_DTPM
 323 #define DTPM_TABLE()                                                    \
 324         . = ALIGN(8);                                                   \
 325         __dtpm_table = .;                                               \
 326         KEEP(*(__dtpm_table))                                           \
 327         __dtpm_table_end = .;
 328 #else
 329 #define DTPM_TABLE()
 330 #endif
 331
 332 #define KERNEL_DTB()                                                    \
 333         STRUCT_ALIGN();                                                 \
 334         __dtb_start = .;                                                \
 335         KEEP(*(.dtb.init.rodata))                                       \
 336         __dtb_end = .;
 337
 338 /*
 339  * .data section
 340  */
 341 #define DATA_DATA                                                       \
 342         *(.xiptext)                                                     \
 343         *(DATA_MAIN)                                                    \
 344         *(.ref.data)                                                    \
 345         *(.data..shared_aligned) /* percpu related */                   \
 346         MEM_KEEP(init.data*)                                            \
 347         MEM_KEEP(exit.data*)                                            \
 348         *(.data.unlikely)                                               \
 349         __start_once = .;                                               \
 350         *(.data.once)                                                   \
 351         __end_once = .;                                                 \
 352         STRUCT_ALIGN();                                                 \
 353         *(__tracepoints)                                                \
 354         /* implement dynamic printk debug */                            \
 355         . = ALIGN(8);                                                   \
 356         __start___dyndbg = .;                                           \
 357         KEEP(*(__dyndbg))                                               \
 358         __stop___dyndbg = .;                                            \
 359         LIKELY_PROFILE()                                                \
 360         BRANCH_PROFILE()                                                \
 361         TRACE_PRINTKS()                                                 \
 362         BPF_RAW_TP()                                                    \
 363         TRACEPOINT_STR()
 364
 365 /*
 366  * Data section helpers
 367  */
 368 #define NOSAVE_DATA                                                     \
 369         . = ALIGN(PAGE_SIZE);                                           \
 370         __nosave_begin = .;                                             \
 371         *(.data..nosave)                                                \
 372         . = ALIGN(PAGE_SIZE);                                           \
 373         __nosave_end = .;
 374
 375 #define PAGE_ALIGNED_DATA(page_align)                                   \
 376         . = ALIGN(page_align);                                          \
 377         *(.data..page_aligned)                                          \
 378         . = ALIGN(page_align);
 379
 380 #define READ_MOSTLY_DATA(align)                                         \
 381         . = ALIGN(align);                                               \
 382         *(.data..read_mostly)                                           \
 383         . = ALIGN(align);
 384
 385 #define CACHELINE_ALIGNED_DATA(align)                                   \
 386         . = ALIGN(align);                                               \
 387         *(.data..cacheline_aligned)
 388
 389 #define INIT_TASK_DATA(align)                                           \
 390         . = ALIGN(align);                                               \
 391         __start_init_task = .;                                          \
 392         init_thread_union = .;                                          \
 393         init_stack = .;                                                 \
 394         KEEP(*(.data..init_task))                                       \
 395         KEEP(*(.data..init_thread_info))                                \
 396         . = __start_init_task + THREAD_SIZE;                            \
 397         __end_init_task = .;
 398
 399 #define JUMP_TABLE_DATA                                                 \
 400         . = ALIGN(8);                                                   \
 401         __start___jump_table = .;                                       \
 402         KEEP(*(__jump_table))                                           \
 403         __stop___jump_table = .;
 404
 405 #define STATIC_CALL_DATA                                                \
 406         . = ALIGN(8);                                                   \
 407         __start_static_call_sites = .;                                  \
 408         KEEP(*(.static_call_sites))                                     \
 409         __stop_static_call_sites = .;                                   \
 410         __start_static_call_tramp_key = .;                              \
 411         KEEP(*(.static_call_tramp_key))                                 \
 412         __stop_static_call_tramp_key = .;
 413
 414 /*
 415  * Allow architectures to handle ro_after_init data on their
 416  * own by defining an empty RO_AFTER_INIT_DATA.
 417  */
 418 #ifndef RO_AFTER_INIT_DATA
 419 #define RO_AFTER_INIT_DATA                                              \
 420         . = ALIGN(8);                                                   \
 421         __start_ro_after_init = .;                                      \
 422         *(.data..ro_after_init)                                         \
 423         JUMP_TABLE_DATA                                                 \
 424         STATIC_CALL_DATA                                                \
 425         __end_ro_after_init = .;
 426 #endif
 427
 428 /*
 429  * Read only Data
 430  */
 431 #define RO_DATA(align)                                                  \
 432         . = ALIGN((align));                                             \
 433         .rodata           : AT(ADDR(.rodata) - LOAD_OFFSET) {           \
 434                 __start_rodata = .;                                     \
 435                 *(.rodata) *(.rodata.*)                                 \
 436                 SCHED_DATA                                              \
 437                 RO_AFTER_INIT_DATA      /* Read only after init */      \
 438                 . = ALIGN(8);                                           \
 439                 __start___tracepoints_ptrs = .;                         \
 440                 KEEP(*(__tracepoints_ptrs)) /* Tracepoints: pointer array */ \
 441                 __stop___tracepoints_ptrs = .;                          \
 442                 *(__tracepoints_strings)/* Tracepoints: strings */      \
 443         }                                                               \
 444                                                                         \
 445         .rodata1          : AT(ADDR(.rodata1) - LOAD_OFFSET) {          \
 446                 *(.rodata1)                                             \
 447         }                                                               \
 448                                                                         \
 449         /* PCI quirks */                                                \
 450         .pci_fixup        : AT(ADDR(.pci_fixup) - LOAD_OFFSET) {        \
 451                 __start_pci_fixups_early = .;                           \
 452                 KEEP(*(.pci_fixup_early))                               \
 453                 __end_pci_fixups_early = .;                             \
 454                 __start_pci_fixups_header = .;                          \
 455                 KEEP(*(.pci_fixup_header))                              \
 456                 __end_pci_fixups_header = .;                            \
 457                 __start_pci_fixups_final = .;                           \
 458                 KEEP(*(.pci_fixup_final))                               \
 459                 __end_pci_fixups_final = .;                             \
 460                 __start_pci_fixups_enable = .;                          \
 461                 KEEP(*(.pci_fixup_enable))                              \
 462                 __end_pci_fixups_enable = .;                            \
 463                 __start_pci_fixups_resume = .;                          \
 464                 KEEP(*(.pci_fixup_resume))                              \
 465                 __end_pci_fixups_resume = .;                            \
 466                 __start_pci_fixups_resume_early = .;                    \
 467                 KEEP(*(.pci_fixup_resume_early))                        \
 468                 __end_pci_fixups_resume_early = .;                      \
 469                 __start_pci_fixups_suspend = .;                         \
 470                 KEEP(*(.pci_fixup_suspend))                             \
 471                 __end_pci_fixups_suspend = .;                           \
 472                 __start_pci_fixups_suspend_late = .;                    \
 473                 KEEP(*(.pci_fixup_suspend_late))                        \
 474                 __end_pci_fixups_suspend_late = .;                      \
 475         }                                                               \
 476                                                                         \
 477         /* Built-in firmware blobs */                                   \
 478         .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) ALIGN(8) {    \
 479                 __start_builtin_fw = .;                                 \
 480                 KEEP(*(.builtin_fw))                                    \
 481                 __end_builtin_fw = .;                                   \
 482         }                                                               \
 483                                                                         \
 484         TRACEDATA                                                       \
 485                                                                         \
 486         PRINTK_INDEX                                                    \
 487                                                                         \
 488         /* Kernel symbol table: Normal symbols */                       \
 489         __ksymtab         : AT(ADDR(__ksymtab) - LOAD_OFFSET) {         \
 490                 __start___ksymtab = .;                                  \
 491                 KEEP(*(SORT(___ksymtab+*)))                             \
 492                 __stop___ksymtab = .;                                   \
 493         }                                                               \
 494                                                                         \
 495         /* Kernel symbol table: GPL-only symbols */                     \
 496         __ksymtab_gpl     : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) {     \
 497                 __start___ksymtab_gpl = .;                              \
 498                 KEEP(*(SORT(___ksymtab_gpl+*)))                         \
 499                 __stop___ksymtab_gpl = .;                               \
 500         }                                                               \
 501                                                                         \
 502         /* Kernel symbol table: Normal symbols */                       \
 503         __kcrctab         : AT(ADDR(__kcrctab) - LOAD_OFFSET) {         \
 504                 __start___kcrctab = .;                                  \
 505                 KEEP(*(SORT(___kcrctab+*)))                             \
 506                 __stop___kcrctab = .;                                   \
 507         }                                                               \
 508                                                                         \
 509         /* Kernel symbol table: GPL-only symbols */                     \
 510         __kcrctab_gpl     : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) {     \
 511                 __start___kcrctab_gpl = .;                              \
 512                 KEEP(*(SORT(___kcrctab_gpl+*)))                         \
 513                 __stop___kcrctab_gpl = .;                               \
 514         }                                                               \
 515                                                                         \
 516         /* Kernel symbol table: strings */                              \
 517         __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
 518                 *(__ksymtab_strings)                                    \
 519         }                                                               \
 520                                                                         \
 521         /* __*init sections */                                          \
 522         __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) {         \
 523                 *(.ref.rodata)                                          \
 524                 MEM_KEEP(init.rodata)                                   \
 525                 MEM_KEEP(exit.rodata)                                   \
 526         }                                                               \
 527                                                                         \
 528         /* Built-in module parameters. */                               \
 529         __param : AT(ADDR(__param) - LOAD_OFFSET) {                     \
 530                 __start___param = .;                                    \
 531                 KEEP(*(__param))                                        \
 532                 __stop___param = .;                                     \
 533         }                                                               \
 534                                                                         \
 535         /* Built-in module versions. */                                 \
 536         __modver : AT(ADDR(__modver) - LOAD_OFFSET) {                   \
 537                 __start___modver = .;                                   \
 538                 KEEP(*(__modver))                                       \
 539                 __stop___modver = .;                                    \
 540         }                                                               \
 541                                                                         \
 542         RO_EXCEPTION_TABLE                                              \
 543         NOTES                                                           \
 544         BTF                                                             \
 545                                                                         \
 546         . = ALIGN((align));                                             \
 547         __end_rodata = .;
 548
 549
 550 /*
 551  * .text..L.cfi.jumptable.* contain Control-Flow Integrity (CFI)
 552  * jump table entries.
 553  */
 554 #ifdef CONFIG_CFI_CLANG
 555 #define TEXT_CFI_JT                                                     \
 556                 . = ALIGN(PMD_SIZE);                                    \
 557                 __cfi_jt_start = .;                                     \
 558                 *(.text..L.cfi.jumptable .text..L.cfi.jumptable.*)      \
 559                 . = ALIGN(PMD_SIZE);                                    \
 560                 __cfi_jt_end = .;
 561 #else
 562 #define TEXT_CFI_JT
 563 #endif
 564
 565 /*
 566  * Non-instrumentable text section
 567  */
 568 #define NOINSTR_TEXT                                                    \
 569                 ALIGN_FUNCTION();                                       \
 570                 __noinstr_text_start = .;                               \
 571                 *(.noinstr.text)                                        \
 572                 __noinstr_text_end = .;
 573
 574 /*
 575  * .text section. Map to function alignment to avoid address changes
 576  * during second ld run in second ld pass when generating System.map
 577  *
 578  * TEXT_MAIN here will match .text.fixup and .text.unlikely if dead
 579  * code elimination is enabled, so these sections should be converted
 580  * to use ".." first.
 581  */
 582 #define TEXT_TEXT                                                       \
 583                 ALIGN_FUNCTION();                                       \
 584                 *(.text.hot .text.hot.*)                                \
 585                 *(TEXT_MAIN .text.fixup)                                \
 586                 *(.text.unlikely .text.unlikely.*)                      \
 587                 *(.text.unknown .text.unknown.*)                        \
 588                 NOINSTR_TEXT                                            \
 589                 *(.text..refcount)                                      \
 590                 *(.ref.text)                                            \
 591                 *(.text.asan.* .text.tsan.*)                            \
 592                 TEXT_CFI_JT                                             \
 593         MEM_KEEP(init.text*)                                            \
 594         MEM_KEEP(exit.text*)                                            \
 595
 596
 597 /* sched.text is aling to function alignment to secure we have same
 598  * address even at second ld pass when generating System.map */
 599 #define SCHED_TEXT                                                      \
 600                 ALIGN_FUNCTION();                                       \
 601                 __sched_text_start = .;                                 \
 602                 *(.sched.text)                                          \
 603                 __sched_text_end = .;
 604
 605 /* spinlock.text is aling to function alignment to secure we have same
 606  * address even at second ld pass when generating System.map */
 607 #define LOCK_TEXT                                                       \
 608                 ALIGN_FUNCTION();                                       \
 609                 __lock_text_start = .;                                  \
 610                 *(.spinlock.text)                                       \
 611                 __lock_text_end = .;
 612
 613 #define CPUIDLE_TEXT                                                    \
 614                 ALIGN_FUNCTION();                                       \
 615                 __cpuidle_text_start = .;                               \
 616                 *(.cpuidle.text)                                        \
 617                 __cpuidle_text_end = .;
 618
 619 #define KPROBES_TEXT                                                    \
 620                 ALIGN_FUNCTION();                                       \
 621                 __kprobes_text_start = .;                               \
 622                 *(.kprobes.text)                                        \
 623                 __kprobes_text_end = .;
 624
 625 #define ENTRY_TEXT                                                      \
 626                 ALIGN_FUNCTION();                                       \
 627                 __entry_text_start = .;                                 \
 628                 *(.entry.text)                                          \
 629                 __entry_text_end = .;
 630
 631 #define IRQENTRY_TEXT                                                   \
 632                 ALIGN_FUNCTION();                                       \
 633                 __irqentry_text_start = .;                              \
 634                 *(.irqentry.text)                                       \
 635                 __irqentry_text_end = .;
 636
 637 #define SOFTIRQENTRY_TEXT                                               \
 638                 ALIGN_FUNCTION();                                       \
 639                 __softirqentry_text_start = .;                          \
 640                 *(.softirqentry.text)                                   \
 641                 __softirqentry_text_end = .;
 642
 643 #define STATIC_CALL_TEXT                                                \
 644                 ALIGN_FUNCTION();                                       \
 645                 __static_call_text_start = .;                           \
 646                 *(.static_call.text)                                    \
 647                 __static_call_text_end = .;
 648
 649 /* Section used for early init (in .S files) */
 650 #define HEAD_TEXT  KEEP(*(.head.text))
 651
 652 #define HEAD_TEXT_SECTION                                                       \
 653         .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) {               \
 654                 HEAD_TEXT                                               \
 655         }
 656
 657 /*
 658  * Exception table
 659  */
 660 #define EXCEPTION_TABLE(align)                                          \
 661         . = ALIGN(align);                                               \
 662         __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {               \
 663                 __start___ex_table = .;                                 \
 664                 KEEP(*(__ex_table))                                     \
 665                 __stop___ex_table = .;                                  \
 666         }
 667
 668 /*
 669  * .BTF
 670  */
 671 #ifdef CONFIG_DEBUG_INFO_BTF
 672 #define BTF                                                             \
 673         .BTF : AT(ADDR(.BTF) - LOAD_OFFSET) {                           \
 674                 __start_BTF = .;                                        \
 675                 KEEP(*(.BTF))                                           \
 676                 __stop_BTF = .;                                         \
 677         }                                                               \
 678         . = ALIGN(4);                                                   \
 679         .BTF_ids : AT(ADDR(.BTF_ids) - LOAD_OFFSET) {                   \
 680                 *(.BTF_ids)                                             \
 681         }
 682 #else
 683 #define BTF
 684 #endif
 685
 686 /*
 687  * Init task
 688  */
 689 #define INIT_TASK_DATA_SECTION(align)                                   \
 690         . = ALIGN(align);                                               \
 691         .data..init_task :  AT(ADDR(.data..init_task) - LOAD_OFFSET) {  \
 692                 INIT_TASK_DATA(align)                                   \
 693         }
 694
 695 #ifdef CONFIG_CONSTRUCTORS
 696 #define KERNEL_CTORS()  . = ALIGN(8);                      \
 697                         __ctors_start = .;                 \
 698                         KEEP(*(SORT(.ctors.*)))            \
 699                         KEEP(*(.ctors))                    \
 700                         KEEP(*(SORT(.init_array.*)))       \
 701                         KEEP(*(.init_array))               \
 702                         __ctors_end = .;
 703 #else
 704 #define KERNEL_CTORS()
 705 #endif
 706
 707 /* init and exit section handling */
 708 #define INIT_DATA                                                       \
 709         KEEP(*(SORT(___kentry+*)))                                      \
 710         *(.init.data init.data.*)                                       \
 711         MEM_DISCARD(init.data*)                                         \
 712         KERNEL_CTORS()                                                  \
 713         MCOUNT_REC()                                                    \
 714         *(.init.rodata .init.rodata.*)                                  \
 715         FTRACE_EVENTS()                                                 \
 716         TRACE_SYSCALLS()                                                \
 717         KPROBE_BLACKLIST()                                              \
 718         ERROR_INJECT_WHITELIST()                                        \
 719         MEM_DISCARD(init.rodata)                                        \
 720         CLK_OF_TABLES()                                                 \
 721         RESERVEDMEM_OF_TABLES()                                         \
 722         TIMER_OF_TABLES()                                               \
 723         CPU_METHOD_OF_TABLES()                                          \
 724         CPUIDLE_METHOD_OF_TABLES()                                      \
 725         KERNEL_DTB()                                                    \
 726         IRQCHIP_OF_MATCH_TABLE()                                        \
 727         ACPI_PROBE_TABLE(irqchip)                                       \
 728         ACPI_PROBE_TABLE(timer)                                         \
 729         THERMAL_TABLE(governor)                                         \
 730         DTPM_TABLE()                                                    \
 731         EARLYCON_TABLE()                                                \
 732         LSM_TABLE()                                                     \
 733         EARLY_LSM_TABLE()                                               \
 734         KUNIT_TABLE()
 735
 736 #define INIT_TEXT                                                       \
 737         *(.init.text .init.text.*)                                      \
 738         *(.text.startup)                                                \
 739         MEM_DISCARD(init.text*)
 740
 741 #define EXIT_DATA                                                       \
 742         *(.exit.data .exit.data.*)                                      \
 743         *(.fini_array .fini_array.*)                                    \
 744         *(.dtors .dtors.*)                                              \
 745         MEM_DISCARD(exit.data*)                                         \
 746         MEM_DISCARD(exit.rodata*)
 747
 748 #define EXIT_TEXT                                                       \
 749         *(.exit.text)                                                   \
 750         *(.text.exit)                                                   \
 751         MEM_DISCARD(exit.text)
 752
 753 #define EXIT_CALL                                                       \
 754         *(.exitcall.exit)
 755
 756 /*
 757  * bss (Block Started by Symbol) - uninitialized data
 758  * zeroed during startup
 759  */
 760 #define SBSS(sbss_align)                                                \
 761         . = ALIGN(sbss_align);                                          \
 762         .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) {                         \
 763                 *(.dynsbss)                                             \
 764                 *(SBSS_MAIN)                                            \
 765                 *(.scommon)                                             \
 766         }
 767
 768 /*
 769  * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra
 770  * sections to the front of bss.
 771  */
 772 #ifndef BSS_FIRST_SECTIONS
 773 #define BSS_FIRST_SECTIONS
 774 #endif
 775
 776 #define BSS(bss_align)                                                  \
 777         . = ALIGN(bss_align);                                           \
 778         .bss : AT(ADDR(.bss) - LOAD_OFFSET) {                           \
 779                 BSS_FIRST_SECTIONS                                      \
 780                 . = ALIGN(PAGE_SIZE);                                   \
 781                 *(.bss..page_aligned)                                   \
 782                 . = ALIGN(PAGE_SIZE);                                   \
 783                 *(.dynbss)                                              \
 784                 *(BSS_MAIN)                                             \
 785                 *(COMMON)                                               \
 786         }
 787
 788 /*
 789  * DWARF debug sections.
 790  * Symbols in the DWARF debugging sections are relative to
 791  * the beginning of the section so we begin them at 0.
 792  */
 793 #define DWARF_DEBUG                                                     \
 794                 /* DWARF 1 */                                           \
 795                 .debug          0 : { *(.debug) }                       \
 796                 .line           0 : { *(.line) }                        \
 797                 /* GNU DWARF 1 extensions */                            \
 798                 .debug_srcinfo  0 : { *(.debug_srcinfo) }               \
 799                 .debug_sfnames  0 : { *(.debug_sfnames) }               \
 800                 /* DWARF 1.1 and DWARF 2 */                             \
 801                 .debug_aranges  0 : { *(.debug_aranges) }               \
 802                 .debug_pubnames 0 : { *(.debug_pubnames) }              \
 803                 /* DWARF 2 */                                           \
 804                 .debug_info     0 : { *(.debug_info                     \
 805                                 .gnu.linkonce.wi.*) }                   \
 806                 .debug_abbrev   0 : { *(.debug_abbrev) }                \
 807                 .debug_line     0 : { *(.debug_line) }                  \
 808                 .debug_frame    0 : { *(.debug_frame) }                 \
 809                 .debug_str      0 : { *(.debug_str) }                   \
 810                 .debug_loc      0 : { *(.debug_loc) }                   \
 811                 .debug_macinfo  0 : { *(.debug_macinfo) }               \
 812                 .debug_pubtypes 0 : { *(.debug_pubtypes) }              \
 813                 /* DWARF 3 */                                           \
 814                 .debug_ranges   0 : { *(.debug_ranges) }                \
 815                 /* SGI/MIPS DWARF 2 extensions */                       \
 816                 .debug_weaknames 0 : { *(.debug_weaknames) }            \
 817                 .debug_funcnames 0 : { *(.debug_funcnames) }            \
 818                 .debug_typenames 0 : { *(.debug_typenames) }            \
 819                 .debug_varnames  0 : { *(.debug_varnames) }             \
 820                 /* GNU DWARF 2 extensions */                            \
 821                 .debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) }      \
 822                 .debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) }      \
 823                 /* DWARF 4 */                                           \
 824                 .debug_types    0 : { *(.debug_types) }                 \
 825                 /* DWARF 5 */                                           \
 826                 .debug_addr     0 : { *(.debug_addr) }                  \
 827                 .debug_line_str 0 : { *(.debug_line_str) }              \
 828                 .debug_loclists 0 : { *(.debug_loclists) }              \
 829                 .debug_macro    0 : { *(.debug_macro) }                 \
 830                 .debug_names    0 : { *(.debug_names) }                 \
 831                 .debug_rnglists 0 : { *(.debug_rnglists) }              \
 832                 .debug_str_offsets      0 : { *(.debug_str_offsets) }
 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 #ifdef CONFIG_PRINTK_INDEX
 900 #define PRINTK_INDEX                                                    \
 901         .printk_index : AT(ADDR(.printk_index) - LOAD_OFFSET) {         \
 902                 __start_printk_index = .;                               \
 903                 *(.printk_index)                                        \
 904                 __stop_printk_index = .;                                \
 905         }
 906 #else
 907 #define PRINTK_INDEX
 908 #endif
 909
 910 #define NOTES                                                           \
 911         .notes : AT(ADDR(.notes) - LOAD_OFFSET) {                       \
 912                 __start_notes = .;                                      \
 913                 KEEP(*(.note.*))                                        \
 914                 __stop_notes = .;                                       \
 915         } NOTES_HEADERS                                                 \
 916         NOTES_HEADERS_RESTORE
 917
 918 #define INIT_SETUP(initsetup_align)                                     \
 919                 . = ALIGN(initsetup_align);                             \
 920                 __setup_start = .;                                      \
 921                 KEEP(*(.init.setup))                                    \
 922                 __setup_end = .;
 923
 924 #define INIT_CALLS_LEVEL(level)                                         \
 925                 __initcall##level##_start = .;                          \
 926                 KEEP(*(.initcall##level##.init))                        \
 927                 KEEP(*(.initcall##level##s.init))                       \
 928
 929 #define INIT_CALLS                                                      \
 930                 __initcall_start = .;                                   \
 931                 KEEP(*(.initcallearly.init))                            \
 932                 INIT_CALLS_LEVEL(0)                                     \
 933                 INIT_CALLS_LEVEL(1)                                     \
 934                 INIT_CALLS_LEVEL(2)                                     \
 935                 INIT_CALLS_LEVEL(3)                                     \
 936                 INIT_CALLS_LEVEL(4)                                     \
 937                 INIT_CALLS_LEVEL(5)                                     \
 938                 INIT_CALLS_LEVEL(rootfs)                                \
 939                 INIT_CALLS_LEVEL(6)                                     \
 940                 INIT_CALLS_LEVEL(7)                                     \
 941                 __initcall_end = .;
 942
 943 #define CON_INITCALL                                                    \
 944                 __con_initcall_start = .;                               \
 945                 KEEP(*(.con_initcall.init))                             \
 946                 __con_initcall_end = .;
 947
 948 /* Alignment must be consistent with (kunit_suite *) in include/kunit/test.h */
 949 #define KUNIT_TABLE()                                                   \
 950                 . = ALIGN(8);                                           \
 951                 __kunit_suites_start = .;                               \
 952                 KEEP(*(.kunit_test_suites))                             \
 953                 __kunit_suites_end = .;
 954
 955 #ifdef CONFIG_BLK_DEV_INITRD
 956 #define INIT_RAM_FS                                                     \
 957         . = ALIGN(4);                                                   \
 958         __initramfs_start = .;                                          \
 959         KEEP(*(.init.ramfs))                                            \
 960         . = ALIGN(8);                                                   \
 961         KEEP(*(.init.ramfs.info))
 962 #else
 963 #define INIT_RAM_FS
 964 #endif
 965
 966 /*
 967  * Memory encryption operates on a page basis. Since we need to clear
 968  * the memory encryption mask for this section, it needs to be aligned
 969  * on a page boundary and be a page-size multiple in length.
 970  *
 971  * Note: We use a separate section so that only this section gets
 972  * decrypted to avoid exposing more than we wish.
 973  */
 974 #ifdef CONFIG_AMD_MEM_ENCRYPT
 975 #define PERCPU_DECRYPTED_SECTION                                        \
 976         . = ALIGN(PAGE_SIZE);                                           \
 977         *(.data..decrypted)                                             \
 978         *(.data..percpu..decrypted)                                     \
 979         . = ALIGN(PAGE_SIZE);
 980 #else
 981 #define PERCPU_DECRYPTED_SECTION
 982 #endif
 983
 984
 985 /*
 986  * Default discarded sections.
 987  *
 988  * Some archs want to discard exit text/data at runtime rather than
 989  * link time due to cross-section references such as alt instructions,
 990  * bug table, eh_frame, etc.  DISCARDS must be the last of output
 991  * section definitions so that such archs put those in earlier section
 992  * definitions.
 993  */
 994 #ifdef RUNTIME_DISCARD_EXIT
 995 #define EXIT_DISCARDS
 996 #else
 997 #define EXIT_DISCARDS                                                   \
 998         EXIT_TEXT                                                       \
 999         EXIT_DATA
1000 #endif
1001
1002 /*
1003  * Clang's -fprofile-arcs, -fsanitize=kernel-address, and
1004  * -fsanitize=thread produce unwanted sections (.eh_frame
1005  * and .init_array.*), but CONFIG_CONSTRUCTORS wants to
1006  * keep any .init_array.* sections.
1007  * https://bugs.llvm.org/show_bug.cgi?id=46478
1008  */
1009 #if defined(CONFIG_GCOV_KERNEL) || defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KCSAN) || \
1010         defined(CONFIG_CFI_CLANG)
1011 # ifdef CONFIG_CONSTRUCTORS
1012 #  define SANITIZER_DISCARDS                                            \
1013         *(.eh_frame)
1014 # else
1015 #  define SANITIZER_DISCARDS                                            \
1016         *(.init_array) *(.init_array.*)                                 \
1017         *(.eh_frame)
1018 # endif
1019 #else
1020 # define SANITIZER_DISCARDS
1021 #endif
1022
1023 #define COMMON_DISCARDS                                                 \
1024         SANITIZER_DISCARDS                                              \
1025         *(.discard)                                                     \
1026         *(.discard.*)                                                   \
1027         *(.modinfo)                                                     \
1028         /* ld.bfd warns about .gnu.version* even when not emitted */    \
1029         *(.gnu.version*)                                                \
1030
1031 #define DISCARDS                                                        \
1032         /DISCARD/ : {                                                   \
1033         EXIT_DISCARDS                                                   \
1034         EXIT_CALL                                                       \
1035         COMMON_DISCARDS                                                 \
1036         }
1037
1038 /**
1039  * PERCPU_INPUT - the percpu input sections
1040  * @cacheline: cacheline size
1041  *
1042  * The core percpu section names and core symbols which do not rely
1043  * directly upon load addresses.
1044  *
1045  * @cacheline is used to align subsections to avoid false cacheline
1046  * sharing between subsections for different purposes.
1047  */
1048 #define PERCPU_INPUT(cacheline)                                         \
1049         __per_cpu_start = .;                                            \
1050         *(.data..percpu..first)                                         \
1051         . = ALIGN(PAGE_SIZE);                                           \
1052         *(.data..percpu..page_aligned)                                  \
1053         . = ALIGN(cacheline);                                           \
1054         *(.data..percpu..read_mostly)                                   \
1055         . = ALIGN(cacheline);                                           \
1056         *(.data..percpu)                                                \
1057         *(.data..percpu..shared_aligned)                                \
1058         PERCPU_DECRYPTED_SECTION                                        \
1059         __per_cpu_end = .;
1060
1061 /**
1062  * PERCPU_VADDR - define output section for percpu area
1063  * @cacheline: cacheline size
1064  * @vaddr: explicit base address (optional)
1065  * @phdr: destination PHDR (optional)
1066  *
1067  * Macro which expands to output section for percpu area.
1068  *
1069  * @cacheline is used to align subsections to avoid false cacheline
1070  * sharing between subsections for different purposes.
1071  *
1072  * If @vaddr is not blank, it specifies explicit base address and all
1073  * percpu symbols will be offset from the given address.  If blank,
1074  * @vaddr always equals @laddr + LOAD_OFFSET.
1075  *
1076  * @phdr defines the output PHDR to use if not blank.  Be warned that
1077  * output PHDR is sticky.  If @phdr is specified, the next output
1078  * section in the linker script will go there too.  @phdr should have
1079  * a leading colon.
1080  *
1081  * Note that this macros defines __per_cpu_load as an absolute symbol.
1082  * If there is no need to put the percpu section at a predetermined
1083  * address, use PERCPU_SECTION.
1084  */
1085 #define PERCPU_VADDR(cacheline, vaddr, phdr)                            \
1086         __per_cpu_load = .;                                             \
1087         .data..percpu vaddr : AT(__per_cpu_load - LOAD_OFFSET) {        \
1088                 PERCPU_INPUT(cacheline)                                 \
1089         } phdr                                                          \
1090         . = __per_cpu_load + SIZEOF(.data..percpu);
1091
1092 /**
1093  * PERCPU_SECTION - define output section for percpu area, simple version
1094  * @cacheline: cacheline size
1095  *
1096  * Align to PAGE_SIZE and outputs output section for percpu area.  This
1097  * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and
1098  * __per_cpu_start will be identical.
1099  *
1100  * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,)
1101  * except that __per_cpu_load is defined as a relative symbol against
1102  * .data..percpu which is required for relocatable x86_32 configuration.
1103  */
1104 #define PERCPU_SECTION(cacheline)                                       \
1105         . = ALIGN(PAGE_SIZE);                                           \
1106         .data..percpu   : AT(ADDR(.data..percpu) - LOAD_OFFSET) {       \
1107                 __per_cpu_load = .;                                     \
1108                 PERCPU_INPUT(cacheline)                                 \
1109         }
1110
1111
1112 /*
1113  * Definition of the high level *_SECTION macros
1114  * They will fit only a subset of the architectures
1115  */
1116
1117
1118 /*
1119  * Writeable data.
1120  * All sections are combined in a single .data section.
1121  * The sections following CONSTRUCTORS are arranged so their
1122  * typical alignment matches.
1123  * A cacheline is typical/always less than a PAGE_SIZE so
1124  * the sections that has this restriction (or similar)
1125  * is located before the ones requiring PAGE_SIZE alignment.
1126  * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
1127  * matches the requirement of PAGE_ALIGNED_DATA.
1128  *
1129  * use 0 as page_align if page_aligned data is not used */
1130 #define RW_DATA(cacheline, pagealigned, inittask)                       \
1131         . = ALIGN(PAGE_SIZE);                                           \
1132         .data : AT(ADDR(.data) - LOAD_OFFSET) {                         \
1133                 INIT_TASK_DATA(inittask)                                \
1134                 NOSAVE_DATA                                             \
1135                 PAGE_ALIGNED_DATA(pagealigned)                          \
1136                 CACHELINE_ALIGNED_DATA(cacheline)                       \
1137                 READ_MOSTLY_DATA(cacheline)                             \
1138                 DATA_DATA                                               \
1139                 CONSTRUCTORS                                            \
1140         }                                                               \
1141         BUG_TABLE                                                       \
1142
1143 #define INIT_TEXT_SECTION(inittext_align)                               \
1144         . = ALIGN(inittext_align);                                      \
1145         .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {               \
1146                 _sinittext = .;                                         \
1147                 INIT_TEXT                                               \
1148                 _einittext = .;                                         \
1149         }
1150
1151 #define INIT_DATA_SECTION(initsetup_align)                              \
1152         .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {               \
1153                 INIT_DATA                                               \
1154                 INIT_SETUP(initsetup_align)                             \
1155                 INIT_CALLS                                              \
1156                 CON_INITCALL                                            \
1157                 INIT_RAM_FS                                             \
1158         }
1159
1160 #define BSS_SECTION(sbss_align, bss_align, stop_align)                  \
1161         . = ALIGN(sbss_align);                                          \
1162         __bss_start = .;                                                \
1163         SBSS(sbss_align)                                                \
1164         BSS(bss_align)                                                  \
1165         . = ALIGN(stop_align);                                          \
1166         __bss_stop = .;