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