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 #define STRUCT_ALIGNMENT 32
 120 #define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT)
 121
 122 /*
 123  * The order of the sched class addresses are important, as they are
 124  * used to determine the order of the priority of each sched class in
 125  * relation to each other.
 126  */
 127 #define SCHED_DATA                              \
 128         STRUCT_ALIGN();                         \
 129         __begin_sched_classes = .;              \
 130         *(__idle_sched_class)                   \
 131         *(__fair_sched_class)                   \
 132         *(__rt_sched_class)                     \
 133         *(__dl_sched_class)                     \
 134         *(__stop_sched_class)                   \
 135         __end_sched_classes = .;
 136
 137 /* The actual configuration determine if the init/exit sections
 138  * are handled as text/data or they can be discarded (which
 139  * often happens at runtime)
 140  */
 141 #ifdef CONFIG_HOTPLUG_CPU
 142 #define CPU_KEEP(sec)    *(.cpu##sec)
 143 #define CPU_DISCARD(sec)
 144 #else
 145 #define CPU_KEEP(sec)
 146 #define CPU_DISCARD(sec) *(.cpu##sec)
 147 #endif
 148
 149 #if defined(CONFIG_MEMORY_HOTPLUG)
 150 #define MEM_KEEP(sec)    *(.mem##sec)
 151 #define MEM_DISCARD(sec)
 152 #else
 153 #define MEM_KEEP(sec)
 154 #define MEM_DISCARD(sec) *(.mem##sec)
 155 #endif
 156
 157 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
 158 /*
 159  * The ftrace call sites are logged to a section whose name depends on the
 160  * compiler option used. A given kernel image will only use one, AKA
 161  * FTRACE_CALLSITE_SECTION. We capture all of them here to avoid header
 162  * dependencies for FTRACE_CALLSITE_SECTION's definition.
 163  *
 164  * Need to also make ftrace_stub_graph point to ftrace_stub
 165  * so that the same stub location may have different protocols
 166  * and not mess up with C verifiers.
 167  *
 168  * ftrace_ops_list_func will be defined as arch_ftrace_ops_list_func
 169  * as some archs will have a different prototype for that function
 170  * but ftrace_ops_list_func() will have a single prototype.
 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                         ftrace_ops_list_func = arch_ftrace_ops_list_func;
 179 #else
 180 # ifdef CONFIG_FUNCTION_TRACER
 181 #  define MCOUNT_REC()  ftrace_stub_graph = ftrace_stub;        \
 182                         ftrace_ops_list_func = arch_ftrace_ops_list_func;
 183 # else
 184 #  define MCOUNT_REC()
 185 # endif
 186 #endif
 187
 188 #ifdef CONFIG_TRACE_BRANCH_PROFILING
 189 #define LIKELY_PROFILE()        __start_annotated_branch_profile = .;   \
 190                                 KEEP(*(_ftrace_annotated_branch))       \
 191                                 __stop_annotated_branch_profile = .;
 192 #else
 193 #define LIKELY_PROFILE()
 194 #endif
 195
 196 #ifdef CONFIG_PROFILE_ALL_BRANCHES
 197 #define BRANCH_PROFILE()        __start_branch_profile = .;             \
 198                                 KEEP(*(_ftrace_branch))                 \
 199                                 __stop_branch_profile = .;
 200 #else
 201 #define BRANCH_PROFILE()
 202 #endif
 203
 204 #ifdef CONFIG_KPROBES
 205 #define KPROBE_BLACKLIST()      . = ALIGN(8);                                 \
 206                                 __start_kprobe_blacklist = .;                 \
 207                                 KEEP(*(_kprobe_blacklist))                    \
 208                                 __stop_kprobe_blacklist = .;
 209 #else
 210 #define KPROBE_BLACKLIST()
 211 #endif
 212
 213 #ifdef CONFIG_FUNCTION_ERROR_INJECTION
 214 #define ERROR_INJECT_WHITELIST()        STRUCT_ALIGN();                       \
 215                         __start_error_injection_whitelist = .;                \
 216                         KEEP(*(_error_injection_whitelist))                   \
 217                         __stop_error_injection_whitelist = .;
 218 #else
 219 #define ERROR_INJECT_WHITELIST()
 220 #endif
 221
 222 #ifdef CONFIG_EVENT_TRACING
 223 #define FTRACE_EVENTS() . = ALIGN(8);                                   \
 224                         __start_ftrace_events = .;                      \
 225                         KEEP(*(_ftrace_events))                         \
 226                         __stop_ftrace_events = .;                       \
 227                         __start_ftrace_eval_maps = .;                   \
 228                         KEEP(*(_ftrace_eval_map))                       \
 229                         __stop_ftrace_eval_maps = .;
 230 #else
 231 #define FTRACE_EVENTS()
 232 #endif
 233
 234 #ifdef CONFIG_TRACING
 235 #define TRACE_PRINTKS()  __start___trace_bprintk_fmt = .;      \
 236                          KEEP(*(__trace_printk_fmt)) /* Trace_printk fmt' pointer */ \
 237                          __stop___trace_bprintk_fmt = .;
 238 #define TRACEPOINT_STR() __start___tracepoint_str = .;  \
 239                          KEEP(*(__tracepoint_str)) /* Trace_printk fmt' pointer */ \
 240                          __stop___tracepoint_str = .;
 241 #else
 242 #define TRACE_PRINTKS()
 243 #define TRACEPOINT_STR()
 244 #endif
 245
 246 #ifdef CONFIG_FTRACE_SYSCALLS
 247 #define TRACE_SYSCALLS() . = ALIGN(8);                                  \
 248                          __start_syscalls_metadata = .;                 \
 249                          KEEP(*(__syscalls_metadata))                   \
 250                          __stop_syscalls_metadata = .;
 251 #else
 252 #define TRACE_SYSCALLS()
 253 #endif
 254
 255 #ifdef CONFIG_BPF_EVENTS
 256 #define BPF_RAW_TP() STRUCT_ALIGN();                                    \
 257                          __start__bpf_raw_tp = .;                       \
 258                          KEEP(*(__bpf_raw_tp_map))                      \
 259                          __stop__bpf_raw_tp = .;
 260 #else
 261 #define BPF_RAW_TP()
 262 #endif
 263
 264 #ifdef CONFIG_SERIAL_EARLYCON
 265 #define EARLYCON_TABLE() . = ALIGN(8);                          \
 266                          __earlycon_table = .;                  \
 267                          KEEP(*(__earlycon_table))              \
 268                          __earlycon_table_end = .;
 269 #else
 270 #define EARLYCON_TABLE()
 271 #endif
 272
 273 #ifdef CONFIG_SECURITY
 274 #define LSM_TABLE()     . = ALIGN(8);                                   \
 275                         __start_lsm_info = .;                           \
 276                         KEEP(*(.lsm_info.init))                         \
 277                         __end_lsm_info = .;
 278 #define EARLY_LSM_TABLE()       . = ALIGN(8);                           \
 279                         __start_early_lsm_info = .;                     \
 280                         KEEP(*(.early_lsm_info.init))                   \
 281                         __end_early_lsm_info = .;
 282 #else
 283 #define LSM_TABLE()
 284 #define EARLY_LSM_TABLE()
 285 #endif
 286
 287 #define ___OF_TABLE(cfg, name)  _OF_TABLE_##cfg(name)
 288 #define __OF_TABLE(cfg, name)   ___OF_TABLE(cfg, name)
 289 #define OF_TABLE(cfg, name)     __OF_TABLE(IS_ENABLED(cfg), name)
 290 #define _OF_TABLE_0(name)
 291 #define _OF_TABLE_1(name)                                               \
 292         . = ALIGN(8);                                                   \
 293         __##name##_of_table = .;                                        \
 294         KEEP(*(__##name##_of_table))                                    \
 295         KEEP(*(__##name##_of_table_end))
 296
 297 #define TIMER_OF_TABLES()       OF_TABLE(CONFIG_TIMER_OF, timer)
 298 #define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip)
 299 #define CLK_OF_TABLES()         OF_TABLE(CONFIG_COMMON_CLK, clk)
 300 #define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem)
 301 #define CPU_METHOD_OF_TABLES()  OF_TABLE(CONFIG_SMP, cpu_method)
 302 #define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method)
 303
 304 #ifdef CONFIG_ACPI
 305 #define ACPI_PROBE_TABLE(name)                                          \
 306         . = ALIGN(8);                                                   \
 307         __##name##_acpi_probe_table = .;                                \
 308         KEEP(*(__##name##_acpi_probe_table))                            \
 309         __##name##_acpi_probe_table_end = .;
 310 #else
 311 #define ACPI_PROBE_TABLE(name)
 312 #endif
 313
 314 #ifdef CONFIG_THERMAL
 315 #define THERMAL_TABLE(name)                                             \
 316         . = ALIGN(8);                                                   \
 317         __##name##_thermal_table = .;                                   \
 318         KEEP(*(__##name##_thermal_table))                               \
 319         __##name##_thermal_table_end = .;
 320 #else
 321 #define THERMAL_TABLE(name)
 322 #endif
 323
 324 #ifdef CONFIG_DTPM
 325 #define DTPM_TABLE()                                                    \
 326         . = ALIGN(8);                                                   \
 327         __dtpm_table = .;                                               \
 328         KEEP(*(__dtpm_table))                                           \
 329         __dtpm_table_end = .;
 330 #else
 331 #define DTPM_TABLE()
 332 #endif
 333
 334 #define KERNEL_DTB()                                                    \
 335         STRUCT_ALIGN();                                                 \
 336         __dtb_start = .;                                                \
 337         KEEP(*(.dtb.init.rodata))                                       \
 338         __dtb_end = .;
 339
 340 /*
 341  * .data section
 342  */
 343 #define DATA_DATA                                                       \
 344         *(.xiptext)                                                     \
 345         *(DATA_MAIN)                                                    \
 346         *(.ref.data)                                                    \
 347         *(.data..shared_aligned) /* percpu related */                   \
 348         MEM_KEEP(init.data*)                                            \
 349         MEM_KEEP(exit.data*)                                            \
 350         *(.data.unlikely)                                               \
 351         __start_once = .;                                               \
 352         *(.data.once)                                                   \
 353         __end_once = .;                                                 \
 354         STRUCT_ALIGN();                                                 \
 355         *(__tracepoints)                                                \
 356         /* implement dynamic printk debug */                            \
 357         . = ALIGN(8);                                                   \
 358         __start___dyndbg = .;                                           \
 359         KEEP(*(__dyndbg))                                               \
 360         __stop___dyndbg = .;                                            \
 361         LIKELY_PROFILE()                                                \
 362         BRANCH_PROFILE()                                                \
 363         TRACE_PRINTKS()                                                 \
 364         BPF_RAW_TP()                                                    \
 365         TRACEPOINT_STR()
 366
 367 /*
 368  * Data section helpers
 369  */
 370 #define NOSAVE_DATA                                                     \
 371         . = ALIGN(PAGE_SIZE);                                           \
 372         __nosave_begin = .;                                             \
 373         *(.data..nosave)                                                \
 374         . = ALIGN(PAGE_SIZE);                                           \
 375         __nosave_end = .;
 376
 377 #define PAGE_ALIGNED_DATA(page_align)                                   \
 378         . = ALIGN(page_align);                                          \
 379         *(.data..page_aligned)                                          \
 380         . = ALIGN(page_align);
 381
 382 #define READ_MOSTLY_DATA(align)                                         \
 383         . = ALIGN(align);                                               \
 384         *(.data..read_mostly)                                           \
 385         . = ALIGN(align);
 386
 387 #define CACHELINE_ALIGNED_DATA(align)                                   \
 388         . = ALIGN(align);                                               \
 389         *(.data..cacheline_aligned)
 390
 391 #define INIT_TASK_DATA(align)                                           \
 392         . = ALIGN(align);                                               \
 393         __start_init_task = .;                                          \
 394         init_thread_union = .;                                          \
 395         init_stack = .;                                                 \
 396         KEEP(*(.data..init_task))                                       \
 397         KEEP(*(.data..init_thread_info))                                \
 398         . = __start_init_task + THREAD_SIZE;                            \
 399         __end_init_task = .;
 400
 401 #define JUMP_TABLE_DATA                                                 \
 402         . = ALIGN(8);                                                   \
 403         __start___jump_table = .;                                       \
 404         KEEP(*(__jump_table))                                           \
 405         __stop___jump_table = .;
 406
 407 #define STATIC_CALL_DATA                                                \
 408         . = ALIGN(8);                                                   \
 409         __start_static_call_sites = .;                                  \
 410         KEEP(*(.static_call_sites))                                     \
 411         __stop_static_call_sites = .;                                   \
 412         __start_static_call_tramp_key = .;                              \
 413         KEEP(*(.static_call_tramp_key))                                 \
 414         __stop_static_call_tramp_key = .;
 415
 416 /*
 417  * Allow architectures to handle ro_after_init data on their
 418  * own by defining an empty RO_AFTER_INIT_DATA.
 419  */
 420 #ifndef RO_AFTER_INIT_DATA
 421 #define RO_AFTER_INIT_DATA                                              \
 422         . = ALIGN(8);                                                   \
 423         __start_ro_after_init = .;                                      \
 424         *(.data..ro_after_init)                                         \
 425         JUMP_TABLE_DATA                                                 \
 426         STATIC_CALL_DATA                                                \
 427         __end_ro_after_init = .;
 428 #endif
 429
 430 /*
 431  * Read only Data
 432  */
 433 #define RO_DATA(align)                                                  \
 434         . = ALIGN((align));                                             \
 435         .rodata           : AT(ADDR(.rodata) - LOAD_OFFSET) {           \
 436                 __start_rodata = .;                                     \
 437                 *(.rodata) *(.rodata.*)                                 \
 438                 SCHED_DATA                                              \
 439                 RO_AFTER_INIT_DATA      /* Read only after init */      \
 440                 . = ALIGN(8);                                           \
 441                 __start___tracepoints_ptrs = .;                         \
 442                 KEEP(*(__tracepoints_ptrs)) /* Tracepoints: pointer array */ \
 443                 __stop___tracepoints_ptrs = .;                          \
 444                 *(__tracepoints_strings)/* Tracepoints: strings */      \
 445         }                                                               \
 446                                                                         \
 447         .rodata1          : AT(ADDR(.rodata1) - LOAD_OFFSET) {          \
 448                 *(.rodata1)                                             \
 449         }                                                               \
 450                                                                         \
 451         /* PCI quirks */                                                \
 452         .pci_fixup        : AT(ADDR(.pci_fixup) - LOAD_OFFSET) {        \
 453                 __start_pci_fixups_early = .;                           \
 454                 KEEP(*(.pci_fixup_early))                               \
 455                 __end_pci_fixups_early = .;                             \
 456                 __start_pci_fixups_header = .;                          \
 457                 KEEP(*(.pci_fixup_header))                              \
 458                 __end_pci_fixups_header = .;                            \
 459                 __start_pci_fixups_final = .;                           \
 460                 KEEP(*(.pci_fixup_final))                               \
 461                 __end_pci_fixups_final = .;                             \
 462                 __start_pci_fixups_enable = .;                          \
 463                 KEEP(*(.pci_fixup_enable))                              \
 464                 __end_pci_fixups_enable = .;                            \
 465                 __start_pci_fixups_resume = .;                          \
 466                 KEEP(*(.pci_fixup_resume))                              \
 467                 __end_pci_fixups_resume = .;                            \
 468                 __start_pci_fixups_resume_early = .;                    \
 469                 KEEP(*(.pci_fixup_resume_early))                        \
 470                 __end_pci_fixups_resume_early = .;                      \
 471                 __start_pci_fixups_suspend = .;                         \
 472                 KEEP(*(.pci_fixup_suspend))                             \
 473                 __end_pci_fixups_suspend = .;                           \
 474                 __start_pci_fixups_suspend_late = .;                    \
 475                 KEEP(*(.pci_fixup_suspend_late))                        \
 476                 __end_pci_fixups_suspend_late = .;                      \
 477         }                                                               \
 478                                                                         \
 479         FW_LOADER_BUILT_IN_DATA                                         \
 480         TRACEDATA                                                       \
 481                                                                         \
 482         PRINTK_INDEX                                                    \
 483                                                                         \
 484         /* Kernel symbol table: Normal symbols */                       \
 485         __ksymtab         : AT(ADDR(__ksymtab) - LOAD_OFFSET) {         \
 486                 __start___ksymtab = .;                                  \
 487                 KEEP(*(SORT(___ksymtab+*)))                             \
 488                 __stop___ksymtab = .;                                   \
 489         }                                                               \
 490                                                                         \
 491         /* Kernel symbol table: GPL-only symbols */                     \
 492         __ksymtab_gpl     : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) {     \
 493                 __start___ksymtab_gpl = .;                              \
 494                 KEEP(*(SORT(___ksymtab_gpl+*)))                         \
 495                 __stop___ksymtab_gpl = .;                               \
 496         }                                                               \
 497                                                                         \
 498         /* Kernel symbol table: Normal symbols */                       \
 499         __kcrctab         : AT(ADDR(__kcrctab) - LOAD_OFFSET) {         \
 500                 __start___kcrctab = .;                                  \
 501                 KEEP(*(SORT(___kcrctab+*)))                             \
 502                 __stop___kcrctab = .;                                   \
 503         }                                                               \
 504                                                                         \
 505         /* Kernel symbol table: GPL-only symbols */                     \
 506         __kcrctab_gpl     : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) {     \
 507                 __start___kcrctab_gpl = .;                              \
 508                 KEEP(*(SORT(___kcrctab_gpl+*)))                         \
 509                 __stop___kcrctab_gpl = .;                               \
 510         }                                                               \
 511                                                                         \
 512         /* Kernel symbol table: strings */                              \
 513         __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
 514                 *(__ksymtab_strings)                                    \
 515         }                                                               \
 516                                                                         \
 517         /* __*init sections */                                          \
 518         __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) {         \
 519                 *(.ref.rodata)                                          \
 520                 MEM_KEEP(init.rodata)                                   \
 521                 MEM_KEEP(exit.rodata)                                   \
 522         }                                                               \
 523                                                                         \
 524         /* Built-in module parameters. */                               \
 525         __param : AT(ADDR(__param) - LOAD_OFFSET) {                     \
 526                 __start___param = .;                                    \
 527                 KEEP(*(__param))                                        \
 528                 __stop___param = .;                                     \
 529         }                                                               \
 530                                                                         \
 531         /* Built-in module versions. */                                 \
 532         __modver : AT(ADDR(__modver) - LOAD_OFFSET) {                   \
 533                 __start___modver = .;                                   \
 534                 KEEP(*(__modver))                                       \
 535                 __stop___modver = .;                                    \
 536         }                                                               \
 537                                                                         \
 538         RO_EXCEPTION_TABLE                                              \
 539         NOTES                                                           \
 540         BTF                                                             \
 541                                                                         \
 542         . = ALIGN((align));                                             \
 543         __end_rodata = .;
 544
 545
 546 /*
 547  * .text..L.cfi.jumptable.* contain Control-Flow Integrity (CFI)
 548  * jump table entries.
 549  */
 550 #ifdef CONFIG_CFI_CLANG
 551 #define TEXT_CFI_JT                                                     \
 552                 . = ALIGN(PMD_SIZE);                                    \
 553                 __cfi_jt_start = .;                                     \
 554                 *(.text..L.cfi.jumptable .text..L.cfi.jumptable.*)      \
 555                 . = ALIGN(PMD_SIZE);                                    \
 556                 __cfi_jt_end = .;
 557 #else
 558 #define TEXT_CFI_JT
 559 #endif
 560
 561 /*
 562  * Non-instrumentable text section
 563  */
 564 #define NOINSTR_TEXT                                                    \
 565                 ALIGN_FUNCTION();                                       \
 566                 __noinstr_text_start = .;                               \
 567                 *(.noinstr.text)                                        \
 568                 __noinstr_text_end = .;
 569
 570 /*
 571  * .text section. Map to function alignment to avoid address changes
 572  * during second ld run in second ld pass when generating System.map
 573  *
 574  * TEXT_MAIN here will match .text.fixup and .text.unlikely if dead
 575  * code elimination is enabled, so these sections should be converted
 576  * to use ".." first.
 577  */
 578 #define TEXT_TEXT                                                       \
 579                 ALIGN_FUNCTION();                                       \
 580                 *(.text.hot .text.hot.*)                                \
 581                 *(TEXT_MAIN .text.fixup)                                \
 582                 *(.text.unlikely .text.unlikely.*)                      \
 583                 *(.text.unknown .text.unknown.*)                        \
 584                 NOINSTR_TEXT                                            \
 585                 *(.text..refcount)                                      \
 586                 *(.ref.text)                                            \
 587                 *(.text.asan.* .text.tsan.*)                            \
 588                 TEXT_CFI_JT                                             \
 589         MEM_KEEP(init.text*)                                            \
 590         MEM_KEEP(exit.text*)                                            \
 591
 592
 593 /* sched.text is aling to function alignment to secure we have same
 594  * address even at second ld pass when generating System.map */
 595 #define SCHED_TEXT                                                      \
 596                 ALIGN_FUNCTION();                                       \
 597                 __sched_text_start = .;                                 \
 598                 *(.sched.text)                                          \
 599                 __sched_text_end = .;
 600
 601 /* spinlock.text is aling to function alignment to secure we have same
 602  * address even at second ld pass when generating System.map */
 603 #define LOCK_TEXT                                                       \
 604                 ALIGN_FUNCTION();                                       \
 605                 __lock_text_start = .;                                  \
 606                 *(.spinlock.text)                                       \
 607                 __lock_text_end = .;
 608
 609 #define CPUIDLE_TEXT                                                    \
 610                 ALIGN_FUNCTION();                                       \
 611                 __cpuidle_text_start = .;                               \
 612                 *(.cpuidle.text)                                        \
 613                 __cpuidle_text_end = .;
 614
 615 #define KPROBES_TEXT                                                    \
 616                 ALIGN_FUNCTION();                                       \
 617                 __kprobes_text_start = .;                               \
 618                 *(.kprobes.text)                                        \
 619                 __kprobes_text_end = .;
 620
 621 #define ENTRY_TEXT                                                      \
 622                 ALIGN_FUNCTION();                                       \
 623                 __entry_text_start = .;                                 \
 624                 *(.entry.text)                                          \
 625                 __entry_text_end = .;
 626
 627 #define IRQENTRY_TEXT                                                   \
 628                 ALIGN_FUNCTION();                                       \
 629                 __irqentry_text_start = .;                              \
 630                 *(.irqentry.text)                                       \
 631                 __irqentry_text_end = .;
 632
 633 #define SOFTIRQENTRY_TEXT                                               \
 634                 ALIGN_FUNCTION();                                       \
 635                 __softirqentry_text_start = .;                          \
 636                 *(.softirqentry.text)                                   \
 637                 __softirqentry_text_end = .;
 638
 639 #define STATIC_CALL_TEXT                                                \
 640                 ALIGN_FUNCTION();                                       \
 641                 __static_call_text_start = .;                           \
 642                 *(.static_call.text)                                    \
 643                 __static_call_text_end = .;
 644
 645 /* Section used for early init (in .S files) */
 646 #define HEAD_TEXT  KEEP(*(.head.text))
 647
 648 #define HEAD_TEXT_SECTION                                                       \
 649         .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) {               \
 650                 HEAD_TEXT                                               \
 651         }
 652
 653 /*
 654  * Exception table
 655  */
 656 #define EXCEPTION_TABLE(align)                                          \
 657         . = ALIGN(align);                                               \
 658         __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {               \
 659                 __start___ex_table = .;                                 \
 660                 KEEP(*(__ex_table))                                     \
 661                 __stop___ex_table = .;                                  \
 662         }
 663
 664 /*
 665  * .BTF
 666  */
 667 #ifdef CONFIG_DEBUG_INFO_BTF
 668 #define BTF                                                             \
 669         .BTF : AT(ADDR(.BTF) - LOAD_OFFSET) {                           \
 670                 __start_BTF = .;                                        \
 671                 KEEP(*(.BTF))                                           \
 672                 __stop_BTF = .;                                         \
 673         }                                                               \
 674         . = ALIGN(4);                                                   \
 675         .BTF_ids : AT(ADDR(.BTF_ids) - LOAD_OFFSET) {                   \
 676                 *(.BTF_ids)                                             \
 677         }
 678 #else
 679 #define BTF
 680 #endif
 681
 682 /*
 683  * Init task
 684  */
 685 #define INIT_TASK_DATA_SECTION(align)                                   \
 686         . = ALIGN(align);                                               \
 687         .data..init_task :  AT(ADDR(.data..init_task) - LOAD_OFFSET) {  \
 688                 INIT_TASK_DATA(align)                                   \
 689         }
 690
 691 #ifdef CONFIG_CONSTRUCTORS
 692 #define KERNEL_CTORS()  . = ALIGN(8);                      \
 693                         __ctors_start = .;                 \
 694                         KEEP(*(SORT(.ctors.*)))            \
 695                         KEEP(*(.ctors))                    \
 696                         KEEP(*(SORT(.init_array.*)))       \
 697                         KEEP(*(.init_array))               \
 698                         __ctors_end = .;
 699 #else
 700 #define KERNEL_CTORS()
 701 #endif
 702
 703 /* init and exit section handling */
 704 #define INIT_DATA                                                       \
 705         KEEP(*(SORT(___kentry+*)))                                      \
 706         *(.init.data init.data.*)                                       \
 707         MEM_DISCARD(init.data*)                                         \
 708         KERNEL_CTORS()                                                  \
 709         MCOUNT_REC()                                                    \
 710         *(.init.rodata .init.rodata.*)                                  \
 711         FTRACE_EVENTS()                                                 \
 712         TRACE_SYSCALLS()                                                \
 713         KPROBE_BLACKLIST()                                              \
 714         ERROR_INJECT_WHITELIST()                                        \
 715         MEM_DISCARD(init.rodata)                                        \
 716         CLK_OF_TABLES()                                                 \
 717         RESERVEDMEM_OF_TABLES()                                         \
 718         TIMER_OF_TABLES()                                               \
 719         CPU_METHOD_OF_TABLES()                                          \
 720         CPUIDLE_METHOD_OF_TABLES()                                      \
 721         KERNEL_DTB()                                                    \
 722         IRQCHIP_OF_MATCH_TABLE()                                        \
 723         ACPI_PROBE_TABLE(irqchip)                                       \
 724         ACPI_PROBE_TABLE(timer)                                         \
 725         THERMAL_TABLE(governor)                                         \
 726         DTPM_TABLE()                                                    \
 727         EARLYCON_TABLE()                                                \
 728         LSM_TABLE()                                                     \
 729         EARLY_LSM_TABLE()                                               \
 730         KUNIT_TABLE()
 731
 732 #define INIT_TEXT                                                       \
 733         *(.init.text .init.text.*)                                      \
 734         *(.text.startup)                                                \
 735         MEM_DISCARD(init.text*)
 736
 737 #define EXIT_DATA                                                       \
 738         *(.exit.data .exit.data.*)                                      \
 739         *(.fini_array .fini_array.*)                                    \
 740         *(.dtors .dtors.*)                                              \
 741         MEM_DISCARD(exit.data*)                                         \
 742         MEM_DISCARD(exit.rodata*)
 743
 744 #define EXIT_TEXT                                                       \
 745         *(.exit.text)                                                   \
 746         *(.text.exit)                                                   \
 747         MEM_DISCARD(exit.text)
 748
 749 #define EXIT_CALL                                                       \
 750         *(.exitcall.exit)
 751
 752 /*
 753  * bss (Block Started by Symbol) - uninitialized data
 754  * zeroed during startup
 755  */
 756 #define SBSS(sbss_align)                                                \
 757         . = ALIGN(sbss_align);                                          \
 758         .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) {                         \
 759                 *(.dynsbss)                                             \
 760                 *(SBSS_MAIN)                                            \
 761                 *(.scommon)                                             \
 762         }
 763
 764 /*
 765  * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra
 766  * sections to the front of bss.
 767  */
 768 #ifndef BSS_FIRST_SECTIONS
 769 #define BSS_FIRST_SECTIONS
 770 #endif
 771
 772 #define BSS(bss_align)                                                  \
 773         . = ALIGN(bss_align);                                           \
 774         .bss : AT(ADDR(.bss) - LOAD_OFFSET) {                           \
 775                 BSS_FIRST_SECTIONS                                      \
 776                 . = ALIGN(PAGE_SIZE);                                   \
 777                 *(.bss..page_aligned)                                   \
 778                 . = ALIGN(PAGE_SIZE);                                   \
 779                 *(.dynbss)                                              \
 780                 *(BSS_MAIN)                                             \
 781                 *(COMMON)                                               \
 782         }
 783
 784 /*
 785  * DWARF debug sections.
 786  * Symbols in the DWARF debugging sections are relative to
 787  * the beginning of the section so we begin them at 0.
 788  */
 789 #define DWARF_DEBUG                                                     \
 790                 /* DWARF 1 */                                           \
 791                 .debug          0 : { *(.debug) }                       \
 792                 .line           0 : { *(.line) }                        \
 793                 /* GNU DWARF 1 extensions */                            \
 794                 .debug_srcinfo  0 : { *(.debug_srcinfo) }               \
 795                 .debug_sfnames  0 : { *(.debug_sfnames) }               \
 796                 /* DWARF 1.1 and DWARF 2 */                             \
 797                 .debug_aranges  0 : { *(.debug_aranges) }               \
 798                 .debug_pubnames 0 : { *(.debug_pubnames) }              \
 799                 /* DWARF 2 */                                           \
 800                 .debug_info     0 : { *(.debug_info                     \
 801                                 .gnu.linkonce.wi.*) }                   \
 802                 .debug_abbrev   0 : { *(.debug_abbrev) }                \
 803                 .debug_line     0 : { *(.debug_line) }                  \
 804                 .debug_frame    0 : { *(.debug_frame) }                 \
 805                 .debug_str      0 : { *(.debug_str) }                   \
 806                 .debug_loc      0 : { *(.debug_loc) }                   \
 807                 .debug_macinfo  0 : { *(.debug_macinfo) }               \
 808                 .debug_pubtypes 0 : { *(.debug_pubtypes) }              \
 809                 /* DWARF 3 */                                           \
 810                 .debug_ranges   0 : { *(.debug_ranges) }                \
 811                 /* SGI/MIPS DWARF 2 extensions */                       \
 812                 .debug_weaknames 0 : { *(.debug_weaknames) }            \
 813                 .debug_funcnames 0 : { *(.debug_funcnames) }            \
 814                 .debug_typenames 0 : { *(.debug_typenames) }            \
 815                 .debug_varnames  0 : { *(.debug_varnames) }             \
 816                 /* GNU DWARF 2 extensions */                            \
 817                 .debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) }      \
 818                 .debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) }      \
 819                 /* DWARF 4 */                                           \
 820                 .debug_types    0 : { *(.debug_types) }                 \
 821                 /* DWARF 5 */                                           \
 822                 .debug_addr     0 : { *(.debug_addr) }                  \
 823                 .debug_line_str 0 : { *(.debug_line_str) }              \
 824                 .debug_loclists 0 : { *(.debug_loclists) }              \
 825                 .debug_macro    0 : { *(.debug_macro) }                 \
 826                 .debug_names    0 : { *(.debug_names) }                 \
 827                 .debug_rnglists 0 : { *(.debug_rnglists) }              \
 828                 .debug_str_offsets      0 : { *(.debug_str_offsets) }
 829
 830 /* Stabs debugging sections. */
 831 #define STABS_DEBUG                                                     \
 832                 .stab 0 : { *(.stab) }                                  \
 833                 .stabstr 0 : { *(.stabstr) }                            \
 834                 .stab.excl 0 : { *(.stab.excl) }                        \
 835                 .stab.exclstr 0 : { *(.stab.exclstr) }                  \
 836                 .stab.index 0 : { *(.stab.index) }                      \
 837                 .stab.indexstr 0 : { *(.stab.indexstr) }
 838
 839 /* Required sections not related to debugging. */
 840 #define ELF_DETAILS                                                     \
 841                 .comment 0 : { *(.comment) }                            \
 842                 .symtab 0 : { *(.symtab) }                              \
 843                 .strtab 0 : { *(.strtab) }                              \
 844                 .shstrtab 0 : { *(.shstrtab) }
 845
 846 #ifdef CONFIG_GENERIC_BUG
 847 #define BUG_TABLE                                                       \
 848         . = ALIGN(8);                                                   \
 849         __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) {             \
 850                 __start___bug_table = .;                                \
 851                 KEEP(*(__bug_table))                                    \
 852                 __stop___bug_table = .;                                 \
 853         }
 854 #else
 855 #define BUG_TABLE
 856 #endif
 857
 858 #ifdef CONFIG_UNWINDER_ORC
 859 #define ORC_UNWIND_TABLE                                                \
 860         . = ALIGN(4);                                                   \
 861         .orc_unwind_ip : AT(ADDR(.orc_unwind_ip) - LOAD_OFFSET) {       \
 862                 __start_orc_unwind_ip = .;                              \
 863                 KEEP(*(.orc_unwind_ip))                                 \
 864                 __stop_orc_unwind_ip = .;                               \
 865         }                                                               \
 866         . = ALIGN(2);                                                   \
 867         .orc_unwind : AT(ADDR(.orc_unwind) - LOAD_OFFSET) {             \
 868                 __start_orc_unwind = .;                                 \
 869                 KEEP(*(.orc_unwind))                                    \
 870                 __stop_orc_unwind = .;                                  \
 871         }                                                               \
 872         text_size = _etext - _stext;                                    \
 873         . = ALIGN(4);                                                   \
 874         .orc_lookup : AT(ADDR(.orc_lookup) - LOAD_OFFSET) {             \
 875                 orc_lookup = .;                                         \
 876                 . += (((text_size + LOOKUP_BLOCK_SIZE - 1) /            \
 877                         LOOKUP_BLOCK_SIZE) + 1) * 4;                    \
 878                 orc_lookup_end = .;                                     \
 879         }
 880 #else
 881 #define ORC_UNWIND_TABLE
 882 #endif
 883
 884 /* Built-in firmware blobs */
 885 #ifdef CONFIG_FW_LOADER
 886 #define FW_LOADER_BUILT_IN_DATA                                         \
 887         .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) ALIGN(8) {    \
 888                 __start_builtin_fw = .;                                 \
 889                 KEEP(*(.builtin_fw))                                    \
 890                 __end_builtin_fw = .;                                   \
 891         }
 892 #else
 893 #define FW_LOADER_BUILT_IN_DATA
 894 #endif
 895
 896 #ifdef CONFIG_PM_TRACE
 897 #define TRACEDATA                                                       \
 898         . = ALIGN(4);                                                   \
 899         .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) {               \
 900                 __tracedata_start = .;                                  \
 901                 KEEP(*(.tracedata))                                     \
 902                 __tracedata_end = .;                                    \
 903         }
 904 #else
 905 #define TRACEDATA
 906 #endif
 907
 908 #ifdef CONFIG_PRINTK_INDEX
 909 #define PRINTK_INDEX                                                    \
 910         .printk_index : AT(ADDR(.printk_index) - LOAD_OFFSET) {         \
 911                 __start_printk_index = .;                               \
 912                 *(.printk_index)                                        \
 913                 __stop_printk_index = .;                                \
 914         }
 915 #else
 916 #define PRINTK_INDEX
 917 #endif
 918
 919 #define NOTES                                                           \
 920         .notes : AT(ADDR(.notes) - LOAD_OFFSET) {                       \
 921                 __start_notes = .;                                      \
 922                 KEEP(*(.note.*))                                        \
 923                 __stop_notes = .;                                       \
 924         } NOTES_HEADERS                                                 \
 925         NOTES_HEADERS_RESTORE
 926
 927 #define INIT_SETUP(initsetup_align)                                     \
 928                 . = ALIGN(initsetup_align);                             \
 929                 __setup_start = .;                                      \
 930                 KEEP(*(.init.setup))                                    \
 931                 __setup_end = .;
 932
 933 #define INIT_CALLS_LEVEL(level)                                         \
 934                 __initcall##level##_start = .;                          \
 935                 KEEP(*(.initcall##level##.init))                        \
 936                 KEEP(*(.initcall##level##s.init))                       \
 937
 938 #define INIT_CALLS                                                      \
 939                 __initcall_start = .;                                   \
 940                 KEEP(*(.initcallearly.init))                            \
 941                 INIT_CALLS_LEVEL(0)                                     \
 942                 INIT_CALLS_LEVEL(1)                                     \
 943                 INIT_CALLS_LEVEL(2)                                     \
 944                 INIT_CALLS_LEVEL(3)                                     \
 945                 INIT_CALLS_LEVEL(4)                                     \
 946                 INIT_CALLS_LEVEL(5)                                     \
 947                 INIT_CALLS_LEVEL(rootfs)                                \
 948                 INIT_CALLS_LEVEL(6)                                     \
 949                 INIT_CALLS_LEVEL(7)                                     \
 950                 __initcall_end = .;
 951
 952 #define CON_INITCALL                                                    \
 953                 __con_initcall_start = .;                               \
 954                 KEEP(*(.con_initcall.init))                             \
 955                 __con_initcall_end = .;
 956
 957 /* Alignment must be consistent with (kunit_suite *) in include/kunit/test.h */
 958 #define KUNIT_TABLE()                                                   \
 959                 . = ALIGN(8);                                           \
 960                 __kunit_suites_start = .;                               \
 961                 KEEP(*(.kunit_test_suites))                             \
 962                 __kunit_suites_end = .;
 963
 964 #ifdef CONFIG_BLK_DEV_INITRD
 965 #define INIT_RAM_FS                                                     \
 966         . = ALIGN(4);                                                   \
 967         __initramfs_start = .;                                          \
 968         KEEP(*(.init.ramfs))                                            \
 969         . = ALIGN(8);                                                   \
 970         KEEP(*(.init.ramfs.info))
 971 #else
 972 #define INIT_RAM_FS
 973 #endif
 974
 975 /*
 976  * Memory encryption operates on a page basis. Since we need to clear
 977  * the memory encryption mask for this section, it needs to be aligned
 978  * on a page boundary and be a page-size multiple in length.
 979  *
 980  * Note: We use a separate section so that only this section gets
 981  * decrypted to avoid exposing more than we wish.
 982  */
 983 #ifdef CONFIG_AMD_MEM_ENCRYPT
 984 #define PERCPU_DECRYPTED_SECTION                                        \
 985         . = ALIGN(PAGE_SIZE);                                           \
 986         *(.data..decrypted)                                             \
 987         *(.data..percpu..decrypted)                                     \
 988         . = ALIGN(PAGE_SIZE);
 989 #else
 990 #define PERCPU_DECRYPTED_SECTION
 991 #endif
 992
 993
 994 /*
 995  * Default discarded sections.
 996  *
 997  * Some archs want to discard exit text/data at runtime rather than
 998  * link time due to cross-section references such as alt instructions,
 999  * bug table, eh_frame, etc.  DISCARDS must be the last of output
1000  * section definitions so that such archs put those in earlier section
1001  * definitions.
1002  */
1003 #ifdef RUNTIME_DISCARD_EXIT
1004 #define EXIT_DISCARDS
1005 #else
1006 #define EXIT_DISCARDS                                                   \
1007         EXIT_TEXT                                                       \
1008         EXIT_DATA
1009 #endif
1010
1011 /*
1012  * Clang's -fprofile-arcs, -fsanitize=kernel-address, and
1013  * -fsanitize=thread produce unwanted sections (.eh_frame
1014  * and .init_array.*), but CONFIG_CONSTRUCTORS wants to
1015  * keep any .init_array.* sections.
1016  * https://bugs.llvm.org/show_bug.cgi?id=46478
1017  */
1018 #if defined(CONFIG_GCOV_KERNEL) || defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KCSAN) || \
1019         defined(CONFIG_CFI_CLANG)
1020 # ifdef CONFIG_CONSTRUCTORS
1021 #  define SANITIZER_DISCARDS                                            \
1022         *(.eh_frame)
1023 # else
1024 #  define SANITIZER_DISCARDS                                            \
1025         *(.init_array) *(.init_array.*)                                 \
1026         *(.eh_frame)
1027 # endif
1028 #else
1029 # define SANITIZER_DISCARDS
1030 #endif
1031
1032 #define COMMON_DISCARDS                                                 \
1033         SANITIZER_DISCARDS                                              \
1034         *(.discard)                                                     \
1035         *(.discard.*)                                                   \
1036         *(.modinfo)                                                     \
1037         /* ld.bfd warns about .gnu.version* even when not emitted */    \
1038         *(.gnu.version*)                                                \
1039
1040 #define DISCARDS                                                        \
1041         /DISCARD/ : {                                                   \
1042         EXIT_DISCARDS                                                   \
1043         EXIT_CALL                                                       \
1044         COMMON_DISCARDS                                                 \
1045         }
1046
1047 /**
1048  * PERCPU_INPUT - the percpu input sections
1049  * @cacheline: cacheline size
1050  *
1051  * The core percpu section names and core symbols which do not rely
1052  * directly upon load addresses.
1053  *
1054  * @cacheline is used to align subsections to avoid false cacheline
1055  * sharing between subsections for different purposes.
1056  */
1057 #define PERCPU_INPUT(cacheline)                                         \
1058         __per_cpu_start = .;                                            \
1059         *(.data..percpu..first)                                         \
1060         . = ALIGN(PAGE_SIZE);                                           \
1061         *(.data..percpu..page_aligned)                                  \
1062         . = ALIGN(cacheline);                                           \
1063         *(.data..percpu..read_mostly)                                   \
1064         . = ALIGN(cacheline);                                           \
1065         *(.data..percpu)                                                \
1066         *(.data..percpu..shared_aligned)                                \
1067         PERCPU_DECRYPTED_SECTION                                        \
1068         __per_cpu_end = .;
1069
1070 /**
1071  * PERCPU_VADDR - define output section for percpu area
1072  * @cacheline: cacheline size
1073  * @vaddr: explicit base address (optional)
1074  * @phdr: destination PHDR (optional)
1075  *
1076  * Macro which expands to output section for percpu area.
1077  *
1078  * @cacheline is used to align subsections to avoid false cacheline
1079  * sharing between subsections for different purposes.
1080  *
1081  * If @vaddr is not blank, it specifies explicit base address and all
1082  * percpu symbols will be offset from the given address.  If blank,
1083  * @vaddr always equals @laddr + LOAD_OFFSET.
1084  *
1085  * @phdr defines the output PHDR to use if not blank.  Be warned that
1086  * output PHDR is sticky.  If @phdr is specified, the next output
1087  * section in the linker script will go there too.  @phdr should have
1088  * a leading colon.
1089  *
1090  * Note that this macros defines __per_cpu_load as an absolute symbol.
1091  * If there is no need to put the percpu section at a predetermined
1092  * address, use PERCPU_SECTION.
1093  */
1094 #define PERCPU_VADDR(cacheline, vaddr, phdr)                            \
1095         __per_cpu_load = .;                                             \
1096         .data..percpu vaddr : AT(__per_cpu_load - LOAD_OFFSET) {        \
1097                 PERCPU_INPUT(cacheline)                                 \
1098         } phdr                                                          \
1099         . = __per_cpu_load + SIZEOF(.data..percpu);
1100
1101 /**
1102  * PERCPU_SECTION - define output section for percpu area, simple version
1103  * @cacheline: cacheline size
1104  *
1105  * Align to PAGE_SIZE and outputs output section for percpu area.  This
1106  * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and
1107  * __per_cpu_start will be identical.
1108  *
1109  * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,)
1110  * except that __per_cpu_load is defined as a relative symbol against
1111  * .data..percpu which is required for relocatable x86_32 configuration.
1112  */
1113 #define PERCPU_SECTION(cacheline)                                       \
1114         . = ALIGN(PAGE_SIZE);                                           \
1115         .data..percpu   : AT(ADDR(.data..percpu) - LOAD_OFFSET) {       \
1116                 __per_cpu_load = .;                                     \
1117                 PERCPU_INPUT(cacheline)                                 \
1118         }
1119
1120
1121 /*
1122  * Definition of the high level *_SECTION macros
1123  * They will fit only a subset of the architectures
1124  */
1125
1126
1127 /*
1128  * Writeable data.
1129  * All sections are combined in a single .data section.
1130  * The sections following CONSTRUCTORS are arranged so their
1131  * typical alignment matches.
1132  * A cacheline is typical/always less than a PAGE_SIZE so
1133  * the sections that has this restriction (or similar)
1134  * is located before the ones requiring PAGE_SIZE alignment.
1135  * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
1136  * matches the requirement of PAGE_ALIGNED_DATA.
1137  *
1138  * use 0 as page_align if page_aligned data is not used */
1139 #define RW_DATA(cacheline, pagealigned, inittask)                       \
1140         . = ALIGN(PAGE_SIZE);                                           \
1141         .data : AT(ADDR(.data) - LOAD_OFFSET) {                         \
1142                 INIT_TASK_DATA(inittask)                                \
1143                 NOSAVE_DATA                                             \
1144                 PAGE_ALIGNED_DATA(pagealigned)                          \
1145                 CACHELINE_ALIGNED_DATA(cacheline)                       \
1146                 READ_MOSTLY_DATA(cacheline)                             \
1147                 DATA_DATA                                               \
1148                 CONSTRUCTORS                                            \
1149         }                                                               \
1150         BUG_TABLE                                                       \
1151
1152 #define INIT_TEXT_SECTION(inittext_align)                               \
1153         . = ALIGN(inittext_align);                                      \
1154         .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {               \
1155                 _sinittext = .;                                         \
1156                 INIT_TEXT                                               \
1157                 _einittext = .;                                         \
1158         }
1159
1160 #define INIT_DATA_SECTION(initsetup_align)                              \
1161         .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {               \
1162                 INIT_DATA                                               \
1163                 INIT_SETUP(initsetup_align)                             \
1164                 INIT_CALLS                                              \
1165                 CON_INITCALL                                            \
1166                 INIT_RAM_FS                                             \
1167         }
1168
1169 #define BSS_SECTION(sbss_align, bss_align, stop_align)                  \
1170         . = ALIGN(sbss_align);                                          \
1171         __bss_start = .;                                                \
1172         SBSS(sbss_align)                                                \
1173         BSS(bss_align)                                                  \
1174         . = ALIGN(stop_align);                                          \
1175         __bss_stop = .;