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         __sched_class_highest = .;              \
 130         *(__stop_sched_class)                   \
 131         *(__dl_sched_class)                     \
 132         *(__rt_sched_class)                     \
 133         *(__fair_sched_class)                   \
 134         *(__idle_sched_class)                   \
 135         __sched_class_lowest = .;
 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 #ifndef CONFIG_HAVE_DYNAMIC_FTRACE_NO_PATCHABLE
 158 #define KEEP_PATCHABLE          KEEP(*(__patchable_function_entries))
 159 #define PATCHABLE_DISCARDS
 160 #else
 161 #define KEEP_PATCHABLE
 162 #define PATCHABLE_DISCARDS      *(__patchable_function_entries)
 163 #endif
 164
 165 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
 166 /*
 167  * The ftrace call sites are logged to a section whose name depends on the
 168  * compiler option used. A given kernel image will only use one, AKA
 169  * FTRACE_CALLSITE_SECTION. We capture all of them here to avoid header
 170  * dependencies for FTRACE_CALLSITE_SECTION's definition.
 171  *
 172  * Need to also make ftrace_stub_graph point to ftrace_stub
 173  * so that the same stub location may have different protocols
 174  * and not mess up with C verifiers.
 175  *
 176  * ftrace_ops_list_func will be defined as arch_ftrace_ops_list_func
 177  * as some archs will have a different prototype for that function
 178  * but ftrace_ops_list_func() will have a single prototype.
 179  */
 180 #define MCOUNT_REC()    . = ALIGN(8);                           \
 181                         __start_mcount_loc = .;                 \
 182                         KEEP(*(__mcount_loc))                   \
 183                         KEEP_PATCHABLE                          \
 184                         __stop_mcount_loc = .;                  \
 185                         ftrace_stub_graph = ftrace_stub;        \
 186                         ftrace_ops_list_func = arch_ftrace_ops_list_func;
 187 #else
 188 # ifdef CONFIG_FUNCTION_TRACER
 189 #  define MCOUNT_REC()  ftrace_stub_graph = ftrace_stub;        \
 190                         ftrace_ops_list_func = arch_ftrace_ops_list_func;
 191 # else
 192 #  define MCOUNT_REC()
 193 # endif
 194 #endif
 195
 196 #ifdef CONFIG_TRACE_BRANCH_PROFILING
 197 #define LIKELY_PROFILE()        __start_annotated_branch_profile = .;   \
 198                                 KEEP(*(_ftrace_annotated_branch))       \
 199                                 __stop_annotated_branch_profile = .;
 200 #else
 201 #define LIKELY_PROFILE()
 202 #endif
 203
 204 #ifdef CONFIG_PROFILE_ALL_BRANCHES
 205 #define BRANCH_PROFILE()        __start_branch_profile = .;             \
 206                                 KEEP(*(_ftrace_branch))                 \
 207                                 __stop_branch_profile = .;
 208 #else
 209 #define BRANCH_PROFILE()
 210 #endif
 211
 212 #ifdef CONFIG_KPROBES
 213 #define KPROBE_BLACKLIST()      . = ALIGN(8);                                 \
 214                                 __start_kprobe_blacklist = .;                 \
 215                                 KEEP(*(_kprobe_blacklist))                    \
 216                                 __stop_kprobe_blacklist = .;
 217 #else
 218 #define KPROBE_BLACKLIST()
 219 #endif
 220
 221 #ifdef CONFIG_FUNCTION_ERROR_INJECTION
 222 #define ERROR_INJECT_WHITELIST()        STRUCT_ALIGN();                       \
 223                         __start_error_injection_whitelist = .;                \
 224                         KEEP(*(_error_injection_whitelist))                   \
 225                         __stop_error_injection_whitelist = .;
 226 #else
 227 #define ERROR_INJECT_WHITELIST()
 228 #endif
 229
 230 #ifdef CONFIG_EVENT_TRACING
 231 #define FTRACE_EVENTS() . = ALIGN(8);                                   \
 232                         __start_ftrace_events = .;                      \
 233                         KEEP(*(_ftrace_events))                         \
 234                         __stop_ftrace_events = .;                       \
 235                         __start_ftrace_eval_maps = .;                   \
 236                         KEEP(*(_ftrace_eval_map))                       \
 237                         __stop_ftrace_eval_maps = .;
 238 #else
 239 #define FTRACE_EVENTS()
 240 #endif
 241
 242 #ifdef CONFIG_TRACING
 243 #define TRACE_PRINTKS()  __start___trace_bprintk_fmt = .;      \
 244                          KEEP(*(__trace_printk_fmt)) /* Trace_printk fmt' pointer */ \
 245                          __stop___trace_bprintk_fmt = .;
 246 #define TRACEPOINT_STR() __start___tracepoint_str = .;  \
 247                          KEEP(*(__tracepoint_str)) /* Trace_printk fmt' pointer */ \
 248                          __stop___tracepoint_str = .;
 249 #else
 250 #define TRACE_PRINTKS()
 251 #define TRACEPOINT_STR()
 252 #endif
 253
 254 #ifdef CONFIG_FTRACE_SYSCALLS
 255 #define TRACE_SYSCALLS() . = ALIGN(8);                                  \
 256                          __start_syscalls_metadata = .;                 \
 257                          KEEP(*(__syscalls_metadata))                   \
 258                          __stop_syscalls_metadata = .;
 259 #else
 260 #define TRACE_SYSCALLS()
 261 #endif
 262
 263 #ifdef CONFIG_BPF_EVENTS
 264 #define BPF_RAW_TP() STRUCT_ALIGN();                                    \
 265                          __start__bpf_raw_tp = .;                       \
 266                          KEEP(*(__bpf_raw_tp_map))                      \
 267                          __stop__bpf_raw_tp = .;
 268 #else
 269 #define BPF_RAW_TP()
 270 #endif
 271
 272 #ifdef CONFIG_SERIAL_EARLYCON
 273 #define EARLYCON_TABLE() . = ALIGN(8);                          \
 274                          __earlycon_table = .;                  \
 275                          KEEP(*(__earlycon_table))              \
 276                          __earlycon_table_end = .;
 277 #else
 278 #define EARLYCON_TABLE()
 279 #endif
 280
 281 #ifdef CONFIG_SECURITY
 282 #define LSM_TABLE()     . = ALIGN(8);                                   \
 283                         __start_lsm_info = .;                           \
 284                         KEEP(*(.lsm_info.init))                         \
 285                         __end_lsm_info = .;
 286 #define EARLY_LSM_TABLE()       . = ALIGN(8);                           \
 287                         __start_early_lsm_info = .;                     \
 288                         KEEP(*(.early_lsm_info.init))                   \
 289                         __end_early_lsm_info = .;
 290 #else
 291 #define LSM_TABLE()
 292 #define EARLY_LSM_TABLE()
 293 #endif
 294
 295 #define ___OF_TABLE(cfg, name)  _OF_TABLE_##cfg(name)
 296 #define __OF_TABLE(cfg, name)   ___OF_TABLE(cfg, name)
 297 #define OF_TABLE(cfg, name)     __OF_TABLE(IS_ENABLED(cfg), name)
 298 #define _OF_TABLE_0(name)
 299 #define _OF_TABLE_1(name)                                               \
 300         . = ALIGN(8);                                                   \
 301         __##name##_of_table = .;                                        \
 302         KEEP(*(__##name##_of_table))                                    \
 303         KEEP(*(__##name##_of_table_end))
 304
 305 #define TIMER_OF_TABLES()       OF_TABLE(CONFIG_TIMER_OF, timer)
 306 #define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip)
 307 #define CLK_OF_TABLES()         OF_TABLE(CONFIG_COMMON_CLK, clk)
 308 #define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem)
 309 #define CPU_METHOD_OF_TABLES()  OF_TABLE(CONFIG_SMP, cpu_method)
 310 #define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method)
 311
 312 #ifdef CONFIG_ACPI
 313 #define ACPI_PROBE_TABLE(name)                                          \
 314         . = ALIGN(8);                                                   \
 315         __##name##_acpi_probe_table = .;                                \
 316         KEEP(*(__##name##_acpi_probe_table))                            \
 317         __##name##_acpi_probe_table_end = .;
 318 #else
 319 #define ACPI_PROBE_TABLE(name)
 320 #endif
 321
 322 #ifdef CONFIG_THERMAL
 323 #define THERMAL_TABLE(name)                                             \
 324         . = ALIGN(8);                                                   \
 325         __##name##_thermal_table = .;                                   \
 326         KEEP(*(__##name##_thermal_table))                               \
 327         __##name##_thermal_table_end = .;
 328 #else
 329 #define THERMAL_TABLE(name)
 330 #endif
 331
 332 #define KERNEL_DTB()                                                    \
 333         STRUCT_ALIGN();                                                 \
 334         __dtb_start = .;                                                \
 335         KEEP(*(.dtb.init.rodata))                                       \
 336         __dtb_end = .;
 337
 338 /*
 339  * .data section
 340  */
 341 #define DATA_DATA                                                       \
 342         *(.xiptext)                                                     \
 343         *(DATA_MAIN)                                                    \
 344         *(.ref.data)                                                    \
 345         *(.data..shared_aligned) /* percpu related */                   \
 346         MEM_KEEP(init.data*)                                            \
 347         MEM_KEEP(exit.data*)                                            \
 348         *(.data.unlikely)                                               \
 349         __start_once = .;                                               \
 350         *(.data.once)                                                   \
 351         __end_once = .;                                                 \
 352         STRUCT_ALIGN();                                                 \
 353         *(__tracepoints)                                                \
 354         /* implement dynamic printk debug */                            \
 355         . = ALIGN(8);                                                   \
 356         __start___dyndbg_classes = .;                                   \
 357         KEEP(*(__dyndbg_classes))                                       \
 358         __stop___dyndbg_classes = .;                                    \
 359         __start___dyndbg = .;                                           \
 360         KEEP(*(__dyndbg))                                               \
 361         __stop___dyndbg = .;                                            \
 362         LIKELY_PROFILE()                                                \
 363         BRANCH_PROFILE()                                                \
 364         TRACE_PRINTKS()                                                 \
 365         BPF_RAW_TP()                                                    \
 366         TRACEPOINT_STR()
 367
 368 /*
 369  * Data section helpers
 370  */
 371 #define NOSAVE_DATA                                                     \
 372         . = ALIGN(PAGE_SIZE);                                           \
 373         __nosave_begin = .;                                             \
 374         *(.data..nosave)                                                \
 375         . = ALIGN(PAGE_SIZE);                                           \
 376         __nosave_end = .;
 377
 378 #define PAGE_ALIGNED_DATA(page_align)                                   \
 379         . = ALIGN(page_align);                                          \
 380         *(.data..page_aligned)                                          \
 381         . = ALIGN(page_align);
 382
 383 #define READ_MOSTLY_DATA(align)                                         \
 384         . = ALIGN(align);                                               \
 385         *(.data..read_mostly)                                           \
 386         . = ALIGN(align);
 387
 388 #define CACHELINE_ALIGNED_DATA(align)                                   \
 389         . = ALIGN(align);                                               \
 390         *(.data..cacheline_aligned)
 391
 392 #define INIT_TASK_DATA(align)                                           \
 393         . = ALIGN(align);                                               \
 394         __start_init_task = .;                                          \
 395         init_thread_union = .;                                          \
 396         init_stack = .;                                                 \
 397         KEEP(*(.data..init_task))                                       \
 398         KEEP(*(.data..init_thread_info))                                \
 399         . = __start_init_task + THREAD_SIZE;                            \
 400         __end_init_task = .;
 401
 402 #define JUMP_TABLE_DATA                                                 \
 403         . = ALIGN(8);                                                   \
 404         __start___jump_table = .;                                       \
 405         KEEP(*(__jump_table))                                           \
 406         __stop___jump_table = .;
 407
 408 #ifdef CONFIG_HAVE_STATIC_CALL_INLINE
 409 #define STATIC_CALL_DATA                                                \
 410         . = ALIGN(8);                                                   \
 411         __start_static_call_sites = .;                                  \
 412         KEEP(*(.static_call_sites))                                     \
 413         __stop_static_call_sites = .;                                   \
 414         __start_static_call_tramp_key = .;                              \
 415         KEEP(*(.static_call_tramp_key))                                 \
 416         __stop_static_call_tramp_key = .;
 417 #else
 418 #define STATIC_CALL_DATA
 419 #endif
 420
 421 /*
 422  * Allow architectures to handle ro_after_init data on their
 423  * own by defining an empty RO_AFTER_INIT_DATA.
 424  */
 425 #ifndef RO_AFTER_INIT_DATA
 426 #define RO_AFTER_INIT_DATA                                              \
 427         . = ALIGN(8);                                                   \
 428         __start_ro_after_init = .;                                      \
 429         *(.data..ro_after_init)                                         \
 430         JUMP_TABLE_DATA                                                 \
 431         STATIC_CALL_DATA                                                \
 432         __end_ro_after_init = .;
 433 #endif
 434
 435 /*
 436  * .kcfi_traps contains a list KCFI trap locations.
 437  */
 438 #ifndef KCFI_TRAPS
 439 #ifdef CONFIG_ARCH_USES_CFI_TRAPS
 440 #define KCFI_TRAPS                                                      \
 441         __kcfi_traps : AT(ADDR(__kcfi_traps) - LOAD_OFFSET) {           \
 442                 __start___kcfi_traps = .;                               \
 443                 KEEP(*(.kcfi_traps))                                    \
 444                 __stop___kcfi_traps = .;                                \
 445         }
 446 #else
 447 #define KCFI_TRAPS
 448 #endif
 449 #endif
 450
 451 /*
 452  * Read only Data
 453  */
 454 #define RO_DATA(align)                                                  \
 455         . = ALIGN((align));                                             \
 456         .rodata           : AT(ADDR(.rodata) - LOAD_OFFSET) {           \
 457                 __start_rodata = .;                                     \
 458                 *(.rodata) *(.rodata.*)                                 \
 459                 SCHED_DATA                                              \
 460                 RO_AFTER_INIT_DATA      /* Read only after init */      \
 461                 . = ALIGN(8);                                           \
 462                 __start___tracepoints_ptrs = .;                         \
 463                 KEEP(*(__tracepoints_ptrs)) /* Tracepoints: pointer array */ \
 464                 __stop___tracepoints_ptrs = .;                          \
 465                 *(__tracepoints_strings)/* Tracepoints: strings */      \
 466         }                                                               \
 467                                                                         \
 468         .rodata1          : AT(ADDR(.rodata1) - LOAD_OFFSET) {          \
 469                 *(.rodata1)                                             \
 470         }                                                               \
 471                                                                         \
 472         /* PCI quirks */                                                \
 473         .pci_fixup        : AT(ADDR(.pci_fixup) - LOAD_OFFSET) {        \
 474                 __start_pci_fixups_early = .;                           \
 475                 KEEP(*(.pci_fixup_early))                               \
 476                 __end_pci_fixups_early = .;                             \
 477                 __start_pci_fixups_header = .;                          \
 478                 KEEP(*(.pci_fixup_header))                              \
 479                 __end_pci_fixups_header = .;                            \
 480                 __start_pci_fixups_final = .;                           \
 481                 KEEP(*(.pci_fixup_final))                               \
 482                 __end_pci_fixups_final = .;                             \
 483                 __start_pci_fixups_enable = .;                          \
 484                 KEEP(*(.pci_fixup_enable))                              \
 485                 __end_pci_fixups_enable = .;                            \
 486                 __start_pci_fixups_resume = .;                          \
 487                 KEEP(*(.pci_fixup_resume))                              \
 488                 __end_pci_fixups_resume = .;                            \
 489                 __start_pci_fixups_resume_early = .;                    \
 490                 KEEP(*(.pci_fixup_resume_early))                        \
 491                 __end_pci_fixups_resume_early = .;                      \
 492                 __start_pci_fixups_suspend = .;                         \
 493                 KEEP(*(.pci_fixup_suspend))                             \
 494                 __end_pci_fixups_suspend = .;                           \
 495                 __start_pci_fixups_suspend_late = .;                    \
 496                 KEEP(*(.pci_fixup_suspend_late))                        \
 497                 __end_pci_fixups_suspend_late = .;                      \
 498         }                                                               \
 499                                                                         \
 500         FW_LOADER_BUILT_IN_DATA                                         \
 501         TRACEDATA                                                       \
 502                                                                         \
 503         PRINTK_INDEX                                                    \
 504                                                                         \
 505         /* Kernel symbol table: Normal symbols */                       \
 506         __ksymtab         : AT(ADDR(__ksymtab) - LOAD_OFFSET) {         \
 507                 __start___ksymtab = .;                                  \
 508                 KEEP(*(SORT(___ksymtab+*)))                             \
 509                 __stop___ksymtab = .;                                   \
 510         }                                                               \
 511                                                                         \
 512         /* Kernel symbol table: GPL-only symbols */                     \
 513         __ksymtab_gpl     : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) {     \
 514                 __start___ksymtab_gpl = .;                              \
 515                 KEEP(*(SORT(___ksymtab_gpl+*)))                         \
 516                 __stop___ksymtab_gpl = .;                               \
 517         }                                                               \
 518                                                                         \
 519         /* Kernel symbol table: Normal symbols */                       \
 520         __kcrctab         : AT(ADDR(__kcrctab) - LOAD_OFFSET) {         \
 521                 __start___kcrctab = .;                                  \
 522                 KEEP(*(SORT(___kcrctab+*)))                             \
 523                 __stop___kcrctab = .;                                   \
 524         }                                                               \
 525                                                                         \
 526         /* Kernel symbol table: GPL-only symbols */                     \
 527         __kcrctab_gpl     : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) {     \
 528                 __start___kcrctab_gpl = .;                              \
 529                 KEEP(*(SORT(___kcrctab_gpl+*)))                         \
 530                 __stop___kcrctab_gpl = .;                               \
 531         }                                                               \
 532                                                                         \
 533         /* Kernel symbol table: strings */                              \
 534         __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
 535                 *(__ksymtab_strings)                                    \
 536         }                                                               \
 537                                                                         \
 538         /* __*init sections */                                          \
 539         __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) {         \
 540                 *(.ref.rodata)                                          \
 541                 MEM_KEEP(init.rodata)                                   \
 542                 MEM_KEEP(exit.rodata)                                   \
 543         }                                                               \
 544                                                                         \
 545         /* Built-in module parameters. */                               \
 546         __param : AT(ADDR(__param) - LOAD_OFFSET) {                     \
 547                 __start___param = .;                                    \
 548                 KEEP(*(__param))                                        \
 549                 __stop___param = .;                                     \
 550         }                                                               \
 551                                                                         \
 552         /* Built-in module versions. */                                 \
 553         __modver : AT(ADDR(__modver) - LOAD_OFFSET) {                   \
 554                 __start___modver = .;                                   \
 555                 KEEP(*(__modver))                                       \
 556                 __stop___modver = .;                                    \
 557         }                                                               \
 558                                                                         \
 559         KCFI_TRAPS                                                      \
 560                                                                         \
 561         RO_EXCEPTION_TABLE                                              \
 562         NOTES                                                           \
 563         BTF                                                             \
 564                                                                         \
 565         . = ALIGN((align));                                             \
 566         __end_rodata = .;
 567
 568
 569 /*
 570  * Non-instrumentable text section
 571  */
 572 #define NOINSTR_TEXT                                                    \
 573                 ALIGN_FUNCTION();                                       \
 574                 __noinstr_text_start = .;                               \
 575                 *(.noinstr.text)                                        \
 576                 __noinstr_text_end = .;
 577
 578 /*
 579  * .text section. Map to function alignment to avoid address changes
 580  * during second ld run in second ld pass when generating System.map
 581  *
 582  * TEXT_MAIN here will match .text.fixup and .text.unlikely if dead
 583  * code elimination is enabled, so these sections should be converted
 584  * to use ".." first.
 585  */
 586 #define TEXT_TEXT                                                       \
 587                 ALIGN_FUNCTION();                                       \
 588                 *(.text.hot .text.hot.*)                                \
 589                 *(TEXT_MAIN .text.fixup)                                \
 590                 *(.text.unlikely .text.unlikely.*)                      \
 591                 *(.text.unknown .text.unknown.*)                        \
 592                 NOINSTR_TEXT                                            \
 593                 *(.text..refcount)                                      \
 594                 *(.ref.text)                                            \
 595                 *(.text.asan.* .text.tsan.*)                            \
 596         MEM_KEEP(init.text*)                                            \
 597         MEM_KEEP(exit.text*)                                            \
 598
 599
 600 /* sched.text is aling to function alignment to secure we have same
 601  * address even at second ld pass when generating System.map */
 602 #define SCHED_TEXT                                                      \
 603                 ALIGN_FUNCTION();                                       \
 604                 __sched_text_start = .;                                 \
 605                 *(.sched.text)                                          \
 606                 __sched_text_end = .;
 607
 608 /* spinlock.text is aling to function alignment to secure we have same
 609  * address even at second ld pass when generating System.map */
 610 #define LOCK_TEXT                                                       \
 611                 ALIGN_FUNCTION();                                       \
 612                 __lock_text_start = .;                                  \
 613                 *(.spinlock.text)                                       \
 614                 __lock_text_end = .;
 615
 616 #define CPUIDLE_TEXT                                                    \
 617                 ALIGN_FUNCTION();                                       \
 618                 __cpuidle_text_start = .;                               \
 619                 *(.cpuidle.text)                                        \
 620                 __cpuidle_text_end = .;
 621
 622 #define KPROBES_TEXT                                                    \
 623                 ALIGN_FUNCTION();                                       \
 624                 __kprobes_text_start = .;                               \
 625                 *(.kprobes.text)                                        \
 626                 __kprobes_text_end = .;
 627
 628 #define ENTRY_TEXT                                                      \
 629                 ALIGN_FUNCTION();                                       \
 630                 __entry_text_start = .;                                 \
 631                 *(.entry.text)                                          \
 632                 __entry_text_end = .;
 633
 634 #define IRQENTRY_TEXT                                                   \
 635                 ALIGN_FUNCTION();                                       \
 636                 __irqentry_text_start = .;                              \
 637                 *(.irqentry.text)                                       \
 638                 __irqentry_text_end = .;
 639
 640 #define SOFTIRQENTRY_TEXT                                               \
 641                 ALIGN_FUNCTION();                                       \
 642                 __softirqentry_text_start = .;                          \
 643                 *(.softirqentry.text)                                   \
 644                 __softirqentry_text_end = .;
 645
 646 #define STATIC_CALL_TEXT                                                \
 647                 ALIGN_FUNCTION();                                       \
 648                 __static_call_text_start = .;                           \
 649                 *(.static_call.text)                                    \
 650                 __static_call_text_end = .;
 651
 652 /* Section used for early init (in .S files) */
 653 #define HEAD_TEXT  KEEP(*(.head.text))
 654
 655 #define HEAD_TEXT_SECTION                                                       \
 656         .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) {               \
 657                 HEAD_TEXT                                               \
 658         }
 659
 660 /*
 661  * Exception table
 662  */
 663 #define EXCEPTION_TABLE(align)                                          \
 664         . = ALIGN(align);                                               \
 665         __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {               \
 666                 __start___ex_table = .;                                 \
 667                 KEEP(*(__ex_table))                                     \
 668                 __stop___ex_table = .;                                  \
 669         }
 670
 671 /*
 672  * .BTF
 673  */
 674 #ifdef CONFIG_DEBUG_INFO_BTF
 675 #define BTF                                                             \
 676         .BTF : AT(ADDR(.BTF) - LOAD_OFFSET) {                           \
 677                 __start_BTF = .;                                        \
 678                 KEEP(*(.BTF))                                           \
 679                 __stop_BTF = .;                                         \
 680         }                                                               \
 681         . = ALIGN(4);                                                   \
 682         .BTF_ids : AT(ADDR(.BTF_ids) - LOAD_OFFSET) {                   \
 683                 *(.BTF_ids)                                             \
 684         }
 685 #else
 686 #define BTF
 687 #endif
 688
 689 /*
 690  * Init task
 691  */
 692 #define INIT_TASK_DATA_SECTION(align)                                   \
 693         . = ALIGN(align);                                               \
 694         .data..init_task :  AT(ADDR(.data..init_task) - LOAD_OFFSET) {  \
 695                 INIT_TASK_DATA(align)                                   \
 696         }
 697
 698 #ifdef CONFIG_CONSTRUCTORS
 699 #define KERNEL_CTORS()  . = ALIGN(8);                      \
 700                         __ctors_start = .;                 \
 701                         KEEP(*(SORT(.ctors.*)))            \
 702                         KEEP(*(.ctors))                    \
 703                         KEEP(*(SORT(.init_array.*)))       \
 704                         KEEP(*(.init_array))               \
 705                         __ctors_end = .;
 706 #else
 707 #define KERNEL_CTORS()
 708 #endif
 709
 710 /* init and exit section handling */
 711 #define INIT_DATA                                                       \
 712         KEEP(*(SORT(___kentry+*)))                                      \
 713         *(.init.data init.data.*)                                       \
 714         MEM_DISCARD(init.data*)                                         \
 715         KERNEL_CTORS()                                                  \
 716         MCOUNT_REC()                                                    \
 717         *(.init.rodata .init.rodata.*)                                  \
 718         FTRACE_EVENTS()                                                 \
 719         TRACE_SYSCALLS()                                                \
 720         KPROBE_BLACKLIST()                                              \
 721         ERROR_INJECT_WHITELIST()                                        \
 722         MEM_DISCARD(init.rodata)                                        \
 723         CLK_OF_TABLES()                                                 \
 724         RESERVEDMEM_OF_TABLES()                                         \
 725         TIMER_OF_TABLES()                                               \
 726         CPU_METHOD_OF_TABLES()                                          \
 727         CPUIDLE_METHOD_OF_TABLES()                                      \
 728         KERNEL_DTB()                                                    \
 729         IRQCHIP_OF_MATCH_TABLE()                                        \
 730         ACPI_PROBE_TABLE(irqchip)                                       \
 731         ACPI_PROBE_TABLE(timer)                                         \
 732         THERMAL_TABLE(governor)                                         \
 733         EARLYCON_TABLE()                                                \
 734         LSM_TABLE()                                                     \
 735         EARLY_LSM_TABLE()                                               \
 736         KUNIT_TABLE()
 737
 738 #define INIT_TEXT                                                       \
 739         *(.init.text .init.text.*)                                      \
 740         *(.text.startup)                                                \
 741         MEM_DISCARD(init.text*)
 742
 743 #define EXIT_DATA                                                       \
 744         *(.exit.data .exit.data.*)                                      \
 745         *(.fini_array .fini_array.*)                                    \
 746         *(.dtors .dtors.*)                                              \
 747         MEM_DISCARD(exit.data*)                                         \
 748         MEM_DISCARD(exit.rodata*)
 749
 750 #define EXIT_TEXT                                                       \
 751         *(.exit.text)                                                   \
 752         *(.text.exit)                                                   \
 753         MEM_DISCARD(exit.text)
 754
 755 #define EXIT_CALL                                                       \
 756         *(.exitcall.exit)
 757
 758 /*
 759  * bss (Block Started by Symbol) - uninitialized data
 760  * zeroed during startup
 761  */
 762 #define SBSS(sbss_align)                                                \
 763         . = ALIGN(sbss_align);                                          \
 764         .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) {                         \
 765                 *(.dynsbss)                                             \
 766                 *(SBSS_MAIN)                                            \
 767                 *(.scommon)                                             \
 768         }
 769
 770 /*
 771  * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra
 772  * sections to the front of bss.
 773  */
 774 #ifndef BSS_FIRST_SECTIONS
 775 #define BSS_FIRST_SECTIONS
 776 #endif
 777
 778 #define BSS(bss_align)                                                  \
 779         . = ALIGN(bss_align);                                           \
 780         .bss : AT(ADDR(.bss) - LOAD_OFFSET) {                           \
 781                 BSS_FIRST_SECTIONS                                      \
 782                 . = ALIGN(PAGE_SIZE);                                   \
 783                 *(.bss..page_aligned)                                   \
 784                 . = ALIGN(PAGE_SIZE);                                   \
 785                 *(.dynbss)                                              \
 786                 *(BSS_MAIN)                                             \
 787                 *(COMMON)                                               \
 788         }
 789
 790 /*
 791  * DWARF debug sections.
 792  * Symbols in the DWARF debugging sections are relative to
 793  * the beginning of the section so we begin them at 0.
 794  */
 795 #define DWARF_DEBUG                                                     \
 796                 /* DWARF 1 */                                           \
 797                 .debug          0 : { *(.debug) }                       \
 798                 .line           0 : { *(.line) }                        \
 799                 /* GNU DWARF 1 extensions */                            \
 800                 .debug_srcinfo  0 : { *(.debug_srcinfo) }               \
 801                 .debug_sfnames  0 : { *(.debug_sfnames) }               \
 802                 /* DWARF 1.1 and DWARF 2 */                             \
 803                 .debug_aranges  0 : { *(.debug_aranges) }               \
 804                 .debug_pubnames 0 : { *(.debug_pubnames) }              \
 805                 /* DWARF 2 */                                           \
 806                 .debug_info     0 : { *(.debug_info                     \
 807                                 .gnu.linkonce.wi.*) }                   \
 808                 .debug_abbrev   0 : { *(.debug_abbrev) }                \
 809                 .debug_line     0 : { *(.debug_line) }                  \
 810                 .debug_frame    0 : { *(.debug_frame) }                 \
 811                 .debug_str      0 : { *(.debug_str) }                   \
 812                 .debug_loc      0 : { *(.debug_loc) }                   \
 813                 .debug_macinfo  0 : { *(.debug_macinfo) }               \
 814                 .debug_pubtypes 0 : { *(.debug_pubtypes) }              \
 815                 /* DWARF 3 */                                           \
 816                 .debug_ranges   0 : { *(.debug_ranges) }                \
 817                 /* SGI/MIPS DWARF 2 extensions */                       \
 818                 .debug_weaknames 0 : { *(.debug_weaknames) }            \
 819                 .debug_funcnames 0 : { *(.debug_funcnames) }            \
 820                 .debug_typenames 0 : { *(.debug_typenames) }            \
 821                 .debug_varnames  0 : { *(.debug_varnames) }             \
 822                 /* GNU DWARF 2 extensions */                            \
 823                 .debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) }      \
 824                 .debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) }      \
 825                 /* DWARF 4 */                                           \
 826                 .debug_types    0 : { *(.debug_types) }                 \
 827                 /* DWARF 5 */                                           \
 828                 .debug_addr     0 : { *(.debug_addr) }                  \
 829                 .debug_line_str 0 : { *(.debug_line_str) }              \
 830                 .debug_loclists 0 : { *(.debug_loclists) }              \
 831                 .debug_macro    0 : { *(.debug_macro) }                 \
 832                 .debug_names    0 : { *(.debug_names) }                 \
 833                 .debug_rnglists 0 : { *(.debug_rnglists) }              \
 834                 .debug_str_offsets      0 : { *(.debug_str_offsets) }
 835
 836 /* Stabs debugging sections. */
 837 #define STABS_DEBUG                                                     \
 838                 .stab 0 : { *(.stab) }                                  \
 839                 .stabstr 0 : { *(.stabstr) }                            \
 840                 .stab.excl 0 : { *(.stab.excl) }                        \
 841                 .stab.exclstr 0 : { *(.stab.exclstr) }                  \
 842                 .stab.index 0 : { *(.stab.index) }                      \
 843                 .stab.indexstr 0 : { *(.stab.indexstr) }
 844
 845 /* Required sections not related to debugging. */
 846 #define ELF_DETAILS                                                     \
 847                 .comment 0 : { *(.comment) }                            \
 848                 .symtab 0 : { *(.symtab) }                              \
 849                 .strtab 0 : { *(.strtab) }                              \
 850                 .shstrtab 0 : { *(.shstrtab) }
 851
 852 #ifdef CONFIG_GENERIC_BUG
 853 #define BUG_TABLE                                                       \
 854         . = ALIGN(8);                                                   \
 855         __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) {             \
 856                 __start___bug_table = .;                                \
 857                 KEEP(*(__bug_table))                                    \
 858                 __stop___bug_table = .;                                 \
 859         }
 860 #else
 861 #define BUG_TABLE
 862 #endif
 863
 864 #ifdef CONFIG_UNWINDER_ORC
 865 #define ORC_UNWIND_TABLE                                                \
 866         . = ALIGN(4);                                                   \
 867         .orc_unwind_ip : AT(ADDR(.orc_unwind_ip) - LOAD_OFFSET) {       \
 868                 __start_orc_unwind_ip = .;                              \
 869                 KEEP(*(.orc_unwind_ip))                                 \
 870                 __stop_orc_unwind_ip = .;                               \
 871         }                                                               \
 872         . = ALIGN(2);                                                   \
 873         .orc_unwind : AT(ADDR(.orc_unwind) - LOAD_OFFSET) {             \
 874                 __start_orc_unwind = .;                                 \
 875                 KEEP(*(.orc_unwind))                                    \
 876                 __stop_orc_unwind = .;                                  \
 877         }                                                               \
 878         text_size = _etext - _stext;                                    \
 879         . = ALIGN(4);                                                   \
 880         .orc_lookup : AT(ADDR(.orc_lookup) - LOAD_OFFSET) {             \
 881                 orc_lookup = .;                                         \
 882                 . += (((text_size + LOOKUP_BLOCK_SIZE - 1) /            \
 883                         LOOKUP_BLOCK_SIZE) + 1) * 4;                    \
 884                 orc_lookup_end = .;                                     \
 885         }
 886 #else
 887 #define ORC_UNWIND_TABLE
 888 #endif
 889
 890 /* Built-in firmware blobs */
 891 #ifdef CONFIG_FW_LOADER
 892 #define FW_LOADER_BUILT_IN_DATA                                         \
 893         .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) ALIGN(8) {    \
 894                 __start_builtin_fw = .;                                 \
 895                 KEEP(*(.builtin_fw))                                    \
 896                 __end_builtin_fw = .;                                   \
 897         }
 898 #else
 899 #define FW_LOADER_BUILT_IN_DATA
 900 #endif
 901
 902 #ifdef CONFIG_PM_TRACE
 903 #define TRACEDATA                                                       \
 904         . = ALIGN(4);                                                   \
 905         .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) {               \
 906                 __tracedata_start = .;                                  \
 907                 KEEP(*(.tracedata))                                     \
 908                 __tracedata_end = .;                                    \
 909         }
 910 #else
 911 #define TRACEDATA
 912 #endif
 913
 914 #ifdef CONFIG_PRINTK_INDEX
 915 #define PRINTK_INDEX                                                    \
 916         .printk_index : AT(ADDR(.printk_index) - LOAD_OFFSET) {         \
 917                 __start_printk_index = .;                               \
 918                 *(.printk_index)                                        \
 919                 __stop_printk_index = .;                                \
 920         }
 921 #else
 922 #define PRINTK_INDEX
 923 #endif
 924
 925 #define NOTES                                                           \
 926         .notes : AT(ADDR(.notes) - LOAD_OFFSET) {                       \
 927                 __start_notes = .;                                      \
 928                 KEEP(*(.note.*))                                        \
 929                 __stop_notes = .;                                       \
 930         } NOTES_HEADERS                                                 \
 931         NOTES_HEADERS_RESTORE
 932
 933 #define INIT_SETUP(initsetup_align)                                     \
 934                 . = ALIGN(initsetup_align);                             \
 935                 __setup_start = .;                                      \
 936                 KEEP(*(.init.setup))                                    \
 937                 __setup_end = .;
 938
 939 #define INIT_CALLS_LEVEL(level)                                         \
 940                 __initcall##level##_start = .;                          \
 941                 KEEP(*(.initcall##level##.init))                        \
 942                 KEEP(*(.initcall##level##s.init))                       \
 943
 944 #define INIT_CALLS                                                      \
 945                 __initcall_start = .;                                   \
 946                 KEEP(*(.initcallearly.init))                            \
 947                 INIT_CALLS_LEVEL(0)                                     \
 948                 INIT_CALLS_LEVEL(1)                                     \
 949                 INIT_CALLS_LEVEL(2)                                     \
 950                 INIT_CALLS_LEVEL(3)                                     \
 951                 INIT_CALLS_LEVEL(4)                                     \
 952                 INIT_CALLS_LEVEL(5)                                     \
 953                 INIT_CALLS_LEVEL(rootfs)                                \
 954                 INIT_CALLS_LEVEL(6)                                     \
 955                 INIT_CALLS_LEVEL(7)                                     \
 956                 __initcall_end = .;
 957
 958 #define CON_INITCALL                                                    \
 959                 __con_initcall_start = .;                               \
 960                 KEEP(*(.con_initcall.init))                             \
 961                 __con_initcall_end = .;
 962
 963 /* Alignment must be consistent with (kunit_suite *) in include/kunit/test.h */
 964 #define KUNIT_TABLE()                                                   \
 965                 . = ALIGN(8);                                           \
 966                 __kunit_suites_start = .;                               \
 967                 KEEP(*(.kunit_test_suites))                             \
 968                 __kunit_suites_end = .;
 969
 970 #ifdef CONFIG_BLK_DEV_INITRD
 971 #define INIT_RAM_FS                                                     \
 972         . = ALIGN(4);                                                   \
 973         __initramfs_start = .;                                          \
 974         KEEP(*(.init.ramfs))                                            \
 975         . = ALIGN(8);                                                   \
 976         KEEP(*(.init.ramfs.info))
 977 #else
 978 #define INIT_RAM_FS
 979 #endif
 980
 981 /*
 982  * Memory encryption operates on a page basis. Since we need to clear
 983  * the memory encryption mask for this section, it needs to be aligned
 984  * on a page boundary and be a page-size multiple in length.
 985  *
 986  * Note: We use a separate section so that only this section gets
 987  * decrypted to avoid exposing more than we wish.
 988  */
 989 #ifdef CONFIG_AMD_MEM_ENCRYPT
 990 #define PERCPU_DECRYPTED_SECTION                                        \
 991         . = ALIGN(PAGE_SIZE);                                           \
 992         *(.data..decrypted)                                             \
 993         *(.data..percpu..decrypted)                                     \
 994         . = ALIGN(PAGE_SIZE);
 995 #else
 996 #define PERCPU_DECRYPTED_SECTION
 997 #endif
 998
 999
1000 /*
1001  * Default discarded sections.
1002  *
1003  * Some archs want to discard exit text/data at runtime rather than
1004  * link time due to cross-section references such as alt instructions,
1005  * bug table, eh_frame, etc.  DISCARDS must be the last of output
1006  * section definitions so that such archs put those in earlier section
1007  * definitions.
1008  */
1009 #ifdef RUNTIME_DISCARD_EXIT
1010 #define EXIT_DISCARDS
1011 #else
1012 #define EXIT_DISCARDS                                                   \
1013         EXIT_TEXT                                                       \
1014         EXIT_DATA
1015 #endif
1016
1017 /*
1018  * Clang's -fprofile-arcs, -fsanitize=kernel-address, and
1019  * -fsanitize=thread produce unwanted sections (.eh_frame
1020  * and .init_array.*), but CONFIG_CONSTRUCTORS wants to
1021  * keep any .init_array.* sections.
1022  * https://bugs.llvm.org/show_bug.cgi?id=46478
1023  */
1024 #if defined(CONFIG_GCOV_KERNEL) || defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KCSAN)
1025 # ifdef CONFIG_CONSTRUCTORS
1026 #  define SANITIZER_DISCARDS                                            \
1027         *(.eh_frame)
1028 # else
1029 #  define SANITIZER_DISCARDS                                            \
1030         *(.init_array) *(.init_array.*)                                 \
1031         *(.eh_frame)
1032 # endif
1033 #else
1034 # define SANITIZER_DISCARDS
1035 #endif
1036
1037 #define COMMON_DISCARDS                                                 \
1038         SANITIZER_DISCARDS                                              \
1039         PATCHABLE_DISCARDS                                              \
1040         *(.discard)                                                     \
1041         *(.discard.*)                                                   \
1042         *(.modinfo)                                                     \
1043         /* ld.bfd warns about .gnu.version* even when not emitted */    \
1044         *(.gnu.version*)                                                \
1045
1046 #define DISCARDS                                                        \
1047         /DISCARD/ : {                                                   \
1048         EXIT_DISCARDS                                                   \
1049         EXIT_CALL                                                       \
1050         COMMON_DISCARDS                                                 \
1051         }
1052
1053 /**
1054  * PERCPU_INPUT - the percpu input sections
1055  * @cacheline: cacheline size
1056  *
1057  * The core percpu section names and core symbols which do not rely
1058  * directly upon load addresses.
1059  *
1060  * @cacheline is used to align subsections to avoid false cacheline
1061  * sharing between subsections for different purposes.
1062  */
1063 #define PERCPU_INPUT(cacheline)                                         \
1064         __per_cpu_start = .;                                            \
1065         *(.data..percpu..first)                                         \
1066         . = ALIGN(PAGE_SIZE);                                           \
1067         *(.data..percpu..page_aligned)                                  \
1068         . = ALIGN(cacheline);                                           \
1069         *(.data..percpu..read_mostly)                                   \
1070         . = ALIGN(cacheline);                                           \
1071         *(.data..percpu)                                                \
1072         *(.data..percpu..shared_aligned)                                \
1073         PERCPU_DECRYPTED_SECTION                                        \
1074         __per_cpu_end = .;
1075
1076 /**
1077  * PERCPU_VADDR - define output section for percpu area
1078  * @cacheline: cacheline size
1079  * @vaddr: explicit base address (optional)
1080  * @phdr: destination PHDR (optional)
1081  *
1082  * Macro which expands to output section for percpu area.
1083  *
1084  * @cacheline is used to align subsections to avoid false cacheline
1085  * sharing between subsections for different purposes.
1086  *
1087  * If @vaddr is not blank, it specifies explicit base address and all
1088  * percpu symbols will be offset from the given address.  If blank,
1089  * @vaddr always equals @laddr + LOAD_OFFSET.
1090  *
1091  * @phdr defines the output PHDR to use if not blank.  Be warned that
1092  * output PHDR is sticky.  If @phdr is specified, the next output
1093  * section in the linker script will go there too.  @phdr should have
1094  * a leading colon.
1095  *
1096  * Note that this macros defines __per_cpu_load as an absolute symbol.
1097  * If there is no need to put the percpu section at a predetermined
1098  * address, use PERCPU_SECTION.
1099  */
1100 #define PERCPU_VADDR(cacheline, vaddr, phdr)                            \
1101         __per_cpu_load = .;                                             \
1102         .data..percpu vaddr : AT(__per_cpu_load - LOAD_OFFSET) {        \
1103                 PERCPU_INPUT(cacheline)                                 \
1104         } phdr                                                          \
1105         . = __per_cpu_load + SIZEOF(.data..percpu);
1106
1107 /**
1108  * PERCPU_SECTION - define output section for percpu area, simple version
1109  * @cacheline: cacheline size
1110  *
1111  * Align to PAGE_SIZE and outputs output section for percpu area.  This
1112  * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and
1113  * __per_cpu_start will be identical.
1114  *
1115  * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,)
1116  * except that __per_cpu_load is defined as a relative symbol against
1117  * .data..percpu which is required for relocatable x86_32 configuration.
1118  */
1119 #define PERCPU_SECTION(cacheline)                                       \
1120         . = ALIGN(PAGE_SIZE);                                           \
1121         .data..percpu   : AT(ADDR(.data..percpu) - LOAD_OFFSET) {       \
1122                 __per_cpu_load = .;                                     \
1123                 PERCPU_INPUT(cacheline)                                 \
1124         }
1125
1126
1127 /*
1128  * Definition of the high level *_SECTION macros
1129  * They will fit only a subset of the architectures
1130  */
1131
1132
1133 /*
1134  * Writeable data.
1135  * All sections are combined in a single .data section.
1136  * The sections following CONSTRUCTORS are arranged so their
1137  * typical alignment matches.
1138  * A cacheline is typical/always less than a PAGE_SIZE so
1139  * the sections that has this restriction (or similar)
1140  * is located before the ones requiring PAGE_SIZE alignment.
1141  * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
1142  * matches the requirement of PAGE_ALIGNED_DATA.
1143  *
1144  * use 0 as page_align if page_aligned data is not used */
1145 #define RW_DATA(cacheline, pagealigned, inittask)                       \
1146         . = ALIGN(PAGE_SIZE);                                           \
1147         .data : AT(ADDR(.data) - LOAD_OFFSET) {                         \
1148                 INIT_TASK_DATA(inittask)                                \
1149                 NOSAVE_DATA                                             \
1150                 PAGE_ALIGNED_DATA(pagealigned)                          \
1151                 CACHELINE_ALIGNED_DATA(cacheline)                       \
1152                 READ_MOSTLY_DATA(cacheline)                             \
1153                 DATA_DATA                                               \
1154                 CONSTRUCTORS                                            \
1155         }                                                               \
1156         BUG_TABLE                                                       \
1157
1158 #define INIT_TEXT_SECTION(inittext_align)                               \
1159         . = ALIGN(inittext_align);                                      \
1160         .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {               \
1161                 _sinittext = .;                                         \
1162                 INIT_TEXT                                               \
1163                 _einittext = .;                                         \
1164         }
1165
1166 #define INIT_DATA_SECTION(initsetup_align)                              \
1167         .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {               \
1168                 INIT_DATA                                               \
1169                 INIT_SETUP(initsetup_align)                             \
1170                 INIT_CALLS                                              \
1171                 CON_INITCALL                                            \
1172                 INIT_RAM_FS                                             \
1173         }
1174
1175 #define BSS_SECTION(sbss_align, bss_align, stop_align)                  \
1176         . = ALIGN(sbss_align);                                          \
1177         __bss_start = .;                                                \
1178         SBSS(sbss_align)                                                \
1179         BSS(bss_align)                                                  \
1180         . = ALIGN(stop_align);                                          \
1181         __bss_stop = .;