include/asm-generic/vmlinux.lds.h

   1 /*
   2  * Helper macros to support writing architecture specific
   3  * linker scripts.
   4  *
   5  * A minimal linker scripts has following content:
   6  * [This is a sample, architectures may have special requiriements]
   7  *
   8  * OUTPUT_FORMAT(...)
   9  * OUTPUT_ARCH(...)
  10  * ENTRY(...)
  11  * SECTIONS
  12  * {
  13  *      . = START;
  14  *      __init_begin = .;
  15  *      HEAD_TEXT_SECTION
  16  *      INIT_TEXT_SECTION(PAGE_SIZE)
  17  *      INIT_DATA_SECTION(...)
  18  *      PERCPU_SECTION(CACHELINE_SIZE)
  19  *      __init_end = .;
  20  *
  21  *      _stext = .;
  22  *      TEXT_SECTION = 0
  23  *      _etext = .;
  24  *
  25  *      _sdata = .;
  26  *      RO_DATA(PAGE_SIZE)
  27  *      RW_DATA(...)
  28  *      _edata = .;
  29  *
  30  *      EXCEPTION_TABLE(...)
  31  *
  32  *      BSS_SECTION(0, 0, 0)
  33  *      _end = .;
  34  *
  35  *      STABS_DEBUG
  36  *      DWARF_DEBUG
  37  *      ELF_DETAILS
  38  *
  39  *      DISCARDS                // must be the last
  40  * }
  41  *
  42  * [__init_begin, __init_end] is the init section that may be freed after init
  43  *      // __init_begin and __init_end should be page aligned, so that we can
  44  *      // free the whole .init memory
  45  * [_stext, _etext] is the text section
  46  * [_sdata, _edata] is the data section
  47  *
  48  * Some of the included output section have their own set of constants.
  49  * Examples are: [__initramfs_start, __initramfs_end] for initramfs and
  50  *               [__nosave_begin, __nosave_end] for the nosave data
  51  */
  52
  53 #ifndef LOAD_OFFSET
  54 #define LOAD_OFFSET 0
  55 #endif
  56
  57 /*
  58  * Only some architectures want to have the .notes segment visible in
  59  * a separate PT_NOTE ELF Program Header. When this happens, it needs
  60  * to be visible in both the kernel text's PT_LOAD and the PT_NOTE
  61  * Program Headers. In this case, though, the PT_LOAD needs to be made
  62  * the default again so that all the following sections don't also end
  63  * up in the PT_NOTE Program Header.
  64  */
  65 #ifdef EMITS_PT_NOTE
  66 #define NOTES_HEADERS           :text :note
  67 #define NOTES_HEADERS_RESTORE   __restore_ph : { *(.__restore_ph) } :text
  68 #else
  69 #define NOTES_HEADERS
  70 #define NOTES_HEADERS_RESTORE
  71 #endif
  72
  73 /*
  74  * Some architectures have non-executable read-only exception tables.
  75  * They can be added to the RO_DATA segment by specifying their desired
  76  * alignment.
  77  */
  78 #ifdef RO_EXCEPTION_TABLE_ALIGN
  79 #define RO_EXCEPTION_TABLE      EXCEPTION_TABLE(RO_EXCEPTION_TABLE_ALIGN)
  80 #else
  81 #define RO_EXCEPTION_TABLE
  82 #endif
  83
  84 /* Align . to a 8 byte boundary equals to maximum function alignment. */
  85 #define ALIGN_FUNCTION()  . = ALIGN(8)
  86
  87 /*
  88  * LD_DEAD_CODE_DATA_ELIMINATION option enables -fdata-sections, which
  89  * generates .data.identifier sections, which need to be pulled in with
  90  * .data. We don't want to pull in .data..other sections, which Linux
  91  * has defined. Same for text and bss.
  92  *
  93  * With LTO_CLANG, the linker also splits sections by default, so we need
  94  * these macros to combine the sections during the final link.
  95  *
  96  * RODATA_MAIN is not used because existing code already defines .rodata.x
  97  * sections to be brought in with rodata.
  98  */
  99 #if defined(CONFIG_LD_DEAD_CODE_DATA_ELIMINATION) || defined(CONFIG_LTO_CLANG)
 100 #define TEXT_MAIN .text .text.[0-9a-zA-Z_]*
 101 #define DATA_MAIN .data .data.[0-9a-zA-Z_]* .data..L* .data..compoundliteral* .data.$__unnamed_* .data.$L*
 102 #define SDATA_MAIN .sdata .sdata.[0-9a-zA-Z_]*
 103 #define RODATA_MAIN .rodata .rodata.[0-9a-zA-Z_]* .rodata..L*
 104 #define BSS_MAIN .bss .bss.[0-9a-zA-Z_]* .bss..compoundliteral*
 105 #define SBSS_MAIN .sbss .sbss.[0-9a-zA-Z_]*
 106 #else
 107 #define TEXT_MAIN .text
 108 #define DATA_MAIN .data
 109 #define SDATA_MAIN .sdata
 110 #define RODATA_MAIN .rodata
 111 #define BSS_MAIN .bss
 112 #define SBSS_MAIN .sbss
 113 #endif
 114
 115 /*
 116  * GCC 4.5 and later have a 32 bytes section alignment for structures.
 117  * Except GCC 4.9, that feels the need to align on 64 bytes.
 118  */
 119 #if __GNUC__ == 4 && __GNUC_MINOR__ == 9
 120 #define STRUCT_ALIGNMENT 64
 121 #else
 122 #define STRUCT_ALIGNMENT 32
 123 #endif
 124 #define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT)
 125
 126 /*
 127  * The order of the sched class addresses are important, as they are
 128  * used to determine the order of the priority of each sched class in
 129  * relation to each other.
 130  */
 131 #define SCHED_DATA                              \
 132         STRUCT_ALIGN();                         \
 133         __begin_sched_classes = .;              \
 134         *(__idle_sched_class)                   \
 135         *(__fair_sched_class)                   \
 136         *(__rt_sched_class)                     \
 137         *(__dl_sched_class)                     \
 138         *(__stop_sched_class)                   \
 139         __end_sched_classes = .;
 140
 141 /* The actual configuration determine if the init/exit sections
 142  * are handled as text/data or they can be discarded (which
 143  * often happens at runtime)
 144  */
 145 #ifdef CONFIG_HOTPLUG_CPU
 146 #define CPU_KEEP(sec)    *(.cpu##sec)
 147 #define CPU_DISCARD(sec)
 148 #else
 149 #define CPU_KEEP(sec)
 150 #define CPU_DISCARD(sec) *(.cpu##sec)
 151 #endif
 152
 153 #if defined(CONFIG_MEMORY_HOTPLUG)
 154 #define MEM_KEEP(sec)    *(.mem##sec)
 155 #define MEM_DISCARD(sec)
 156 #else
 157 #define MEM_KEEP(sec)
 158 #define MEM_DISCARD(sec) *(.mem##sec)
 159 #endif
 160
 161 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
 162 /*
 163  * The ftrace call sites are logged to a section whose name depends on the
 164  * compiler option used. A given kernel image will only use one, AKA
 165  * FTRACE_CALLSITE_SECTION. We capture all of them here to avoid header
 166  * dependencies for FTRACE_CALLSITE_SECTION's definition.
 167  *
 168  * Need to also make ftrace_stub_graph point to ftrace_stub
 169  * so that the same stub location may have different protocols
 170  * and not mess up with C verifiers.
 171  */
 172 #define MCOUNT_REC()    . = ALIGN(8);                           \
 173                         __start_mcount_loc = .;                 \
 174                         KEEP(*(__mcount_loc))                   \
 175                         KEEP(*(__patchable_function_entries))   \
 176                         __stop_mcount_loc = .;                  \
 177                         ftrace_stub_graph = ftrace_stub;
 178 #else
 179 # ifdef CONFIG_FUNCTION_TRACER
 180 #  define MCOUNT_REC()  ftrace_stub_graph = ftrace_stub;
 181 # else
 182 #  define MCOUNT_REC()
 183 # endif
 184 #endif
 185
 186 #ifdef CONFIG_TRACE_BRANCH_PROFILING
 187 #define LIKELY_PROFILE()        __start_annotated_branch_profile = .;   \
 188                                 KEEP(*(_ftrace_annotated_branch))       \
 189                                 __stop_annotated_branch_profile = .;
 190 #else
 191 #define LIKELY_PROFILE()
 192 #endif
 193
 194 #ifdef CONFIG_PROFILE_ALL_BRANCHES
 195 #define BRANCH_PROFILE()        __start_branch_profile = .;             \
 196                                 KEEP(*(_ftrace_branch))                 \
 197                                 __stop_branch_profile = .;
 198 #else
 199 #define BRANCH_PROFILE()
 200 #endif
 201
 202 #ifdef CONFIG_KPROBES
 203 #define KPROBE_BLACKLIST()      . = ALIGN(8);                                 \
 204                                 __start_kprobe_blacklist = .;                 \
 205                                 KEEP(*(_kprobe_blacklist))                    \
 206                                 __stop_kprobe_blacklist = .;
 207 #else
 208 #define KPROBE_BLACKLIST()
 209 #endif
 210
 211 #ifdef CONFIG_FUNCTION_ERROR_INJECTION
 212 #define ERROR_INJECT_WHITELIST()        STRUCT_ALIGN();                       \
 213                         __start_error_injection_whitelist = .;                \
 214                         KEEP(*(_error_injection_whitelist))                   \
 215                         __stop_error_injection_whitelist = .;
 216 #else
 217 #define ERROR_INJECT_WHITELIST()
 218 #endif
 219
 220 #ifdef CONFIG_EVENT_TRACING
 221 #define FTRACE_EVENTS() . = ALIGN(8);                                   \
 222                         __start_ftrace_events = .;                      \
 223                         KEEP(*(_ftrace_events))                         \
 224                         __stop_ftrace_events = .;                       \
 225                         __start_ftrace_eval_maps = .;                   \
 226                         KEEP(*(_ftrace_eval_map))                       \
 227                         __stop_ftrace_eval_maps = .;
 228 #else
 229 #define FTRACE_EVENTS()
 230 #endif
 231
 232 #ifdef CONFIG_TRACING
 233 #define TRACE_PRINTKS()  __start___trace_bprintk_fmt = .;      \
 234                          KEEP(*(__trace_printk_fmt)) /* Trace_printk fmt' pointer */ \
 235                          __stop___trace_bprintk_fmt = .;
 236 #define TRACEPOINT_STR() __start___tracepoint_str = .;  \
 237                          KEEP(*(__tracepoint_str)) /* Trace_printk fmt' pointer */ \
 238                          __stop___tracepoint_str = .;
 239 #else
 240 #define TRACE_PRINTKS()
 241 #define TRACEPOINT_STR()
 242 #endif
 243
 244 #ifdef CONFIG_FTRACE_SYSCALLS
 245 #define TRACE_SYSCALLS() . = ALIGN(8);                                  \
 246                          __start_syscalls_metadata = .;                 \
 247                          KEEP(*(__syscalls_metadata))                   \
 248                          __stop_syscalls_metadata = .;
 249 #else
 250 #define TRACE_SYSCALLS()
 251 #endif
 252
 253 #ifdef CONFIG_BPF_EVENTS
 254 #define BPF_RAW_TP() STRUCT_ALIGN();                                    \
 255                          __start__bpf_raw_tp = .;                       \
 256                          KEEP(*(__bpf_raw_tp_map))                      \
 257                          __stop__bpf_raw_tp = .;
 258 #else
 259 #define BPF_RAW_TP()
 260 #endif
 261
 262 #ifdef CONFIG_SERIAL_EARLYCON
 263 #define EARLYCON_TABLE() . = ALIGN(8);                          \
 264                          __earlycon_table = .;                  \
 265                          KEEP(*(__earlycon_table))              \
 266                          __earlycon_table_end = .;
 267 #else
 268 #define EARLYCON_TABLE()
 269 #endif
 270
 271 #ifdef CONFIG_SECURITY
 272 #define LSM_TABLE()     . = ALIGN(8);                                   \
 273                         __start_lsm_info = .;                           \
 274                         KEEP(*(.lsm_info.init))                         \
 275                         __end_lsm_info = .;
 276 #define EARLY_LSM_TABLE()       . = ALIGN(8);                           \
 277                         __start_early_lsm_info = .;                     \
 278                         KEEP(*(.early_lsm_info.init))                   \
 279                         __end_early_lsm_info = .;
 280 #else
 281 #define LSM_TABLE()
 282 #define EARLY_LSM_TABLE()
 283 #endif
 284
 285 #define ___OF_TABLE(cfg, name)  _OF_TABLE_##cfg(name)
 286 #define __OF_TABLE(cfg, name)   ___OF_TABLE(cfg, name)
 287 #define OF_TABLE(cfg, name)     __OF_TABLE(IS_ENABLED(cfg), name)
 288 #define _OF_TABLE_0(name)
 289 #define _OF_TABLE_1(name)                                               \
 290         . = ALIGN(8);                                                   \
 291         __##name##_of_table = .;                                        \
 292         KEEP(*(__##name##_of_table))                                    \
 293         KEEP(*(__##name##_of_table_end))
 294
 295 #define TIMER_OF_TABLES()       OF_TABLE(CONFIG_TIMER_OF, timer)
 296 #define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip)
 297 #define CLK_OF_TABLES()         OF_TABLE(CONFIG_COMMON_CLK, clk)
 298 #define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem)
 299 #define CPU_METHOD_OF_TABLES()  OF_TABLE(CONFIG_SMP, cpu_method)
 300 #define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method)
 301
 302 #ifdef CONFIG_ACPI
 303 #define ACPI_PROBE_TABLE(name)                                          \
 304         . = ALIGN(8);                                                   \
 305         __##name##_acpi_probe_table = .;                                \
 306         KEEP(*(__##name##_acpi_probe_table))                            \
 307         __##name##_acpi_probe_table_end = .;
 308 #else
 309 #define ACPI_PROBE_TABLE(name)
 310 #endif
 311
 312 #ifdef CONFIG_THERMAL
 313 #define THERMAL_TABLE(name)                                             \
 314         . = ALIGN(8);                                                   \
 315         __##name##_thermal_table = .;                                   \
 316         KEEP(*(__##name##_thermal_table))                               \
 317         __##name##_thermal_table_end = .;
 318 #else
 319 #define THERMAL_TABLE(name)
 320 #endif
 321
 322 #ifdef CONFIG_DTPM
 323 #define DTPM_TABLE()                                                    \
 324         . = ALIGN(8);                                                   \
 325         __dtpm_table = .;                                               \
 326         KEEP(*(__dtpm_table))                                           \
 327         __dtpm_table_end = .;
 328 #else
 329 #define DTPM_TABLE()
 330 #endif
 331
 332 #define KERNEL_DTB()                                                    \
 333         STRUCT_ALIGN();                                                 \
 334         __dtb_start = .;                                                \
 335         KEEP(*(.dtb.init.rodata))                                       \
 336         __dtb_end = .;
 337
 338 /*
 339  * .data section
 340  */
 341 #define DATA_DATA                                                       \
 342         *(.xiptext)                                                     \
 343         *(DATA_MAIN)                                                    \
 344         *(.ref.data)                                                    \
 345         *(.data..shared_aligned) /* percpu related */                   \
 346         MEM_KEEP(init.data*)                                            \
 347         MEM_KEEP(exit.data*)                                            \
 348         *(.data.unlikely)                                               \
 349         __start_once = .;                                               \
 350         *(.data.once)                                                   \
 351         __end_once = .;                                                 \
 352         STRUCT_ALIGN();                                                 \
 353         *(__tracepoints)                                                \
 354         /* implement dynamic printk debug */                            \
 355         . = ALIGN(8);                                                   \
 356         __start___dyndbg = .;                                           \
 357         KEEP(*(__dyndbg))                                               \
 358         __stop___dyndbg = .;                                            \
 359         LIKELY_PROFILE()                                                \
 360         BRANCH_PROFILE()                                                \
 361         TRACE_PRINTKS()                                                 \
 362         BPF_RAW_TP()                                                    \
 363         TRACEPOINT_STR()
 364
 365 /*
 366  * Data section helpers
 367  */
 368 #define NOSAVE_DATA                                                     \
 369         . = ALIGN(PAGE_SIZE);                                           \
 370         __nosave_begin = .;                                             \
 371         *(.data..nosave)                                                \
 372         . = ALIGN(PAGE_SIZE);                                           \
 373         __nosave_end = .;
 374
 375 #define PAGE_ALIGNED_DATA(page_align)                                   \
 376         . = ALIGN(page_align);                                          \
 377         *(.data..page_aligned)                                          \
 378         . = ALIGN(page_align);
 379
 380 #define READ_MOSTLY_DATA(align)                                         \
 381         . = ALIGN(align);                                               \
 382         *(.data..read_mostly)                                           \
 383         . = ALIGN(align);
 384
 385 #define CACHELINE_ALIGNED_DATA(align)                                   \
 386         . = ALIGN(align);                                               \
 387         *(.data..cacheline_aligned)
 388
 389 #define INIT_TASK_DATA(align)                                           \
 390         . = ALIGN(align);                                               \
 391         __start_init_task = .;                                          \
 392         init_thread_union = .;                                          \
 393         init_stack = .;                                                 \
 394         KEEP(*(.data..init_task))                                       \
 395         KEEP(*(.data..init_thread_info))                                \
 396         . = __start_init_task + THREAD_SIZE;                            \
 397         __end_init_task = .;
 398
 399 #define JUMP_TABLE_DATA                                                 \
 400         . = ALIGN(8);                                                   \
 401         __start___jump_table = .;                                       \
 402         KEEP(*(__jump_table))                                           \
 403         __stop___jump_table = .;
 404
 405 #define STATIC_CALL_DATA                                                \
 406         . = ALIGN(8);                                                   \
 407         __start_static_call_sites = .;                                  \
 408         KEEP(*(.static_call_sites))                                     \
 409         __stop_static_call_sites = .;                                   \
 410         __start_static_call_tramp_key = .;                              \
 411         KEEP(*(.static_call_tramp_key))                                 \
 412         __stop_static_call_tramp_key = .;
 413
 414 /*
 415  * Allow architectures to handle ro_after_init data on their
 416  * own by defining an empty RO_AFTER_INIT_DATA.
 417  */
 418 #ifndef RO_AFTER_INIT_DATA
 419 #define RO_AFTER_INIT_DATA                                              \
 420         . = ALIGN(8);                                                   \
 421         __start_ro_after_init = .;                                      \
 422         *(.data..ro_after_init)                                         \
 423         JUMP_TABLE_DATA                                                 \
 424         STATIC_CALL_DATA                                                \
 425         __end_ro_after_init = .;
 426 #endif
 427
 428 /*
 429  * Read only Data
 430  */
 431 #define RO_DATA(align)                                                  \
 432         . = ALIGN((align));                                             \
 433         .rodata           : AT(ADDR(.rodata) - LOAD_OFFSET) {           \
 434                 __start_rodata = .;                                     \
 435                 *(.rodata) *(.rodata.*)                                 \
 436                 SCHED_DATA                                              \
 437                 RO_AFTER_INIT_DATA      /* Read only after init */      \
 438                 . = ALIGN(8);                                           \
 439                 __start___tracepoints_ptrs = .;                         \
 440                 KEEP(*(__tracepoints_ptrs)) /* Tracepoints: pointer array */ \
 441                 __stop___tracepoints_ptrs = .;                          \
 442                 *(__tracepoints_strings)/* Tracepoints: strings */      \
 443         }                                                               \
 444                                                                         \
 445         .rodata1          : AT(ADDR(.rodata1) - LOAD_OFFSET) {          \
 446                 *(.rodata1)                                             \
 447         }                                                               \
 448                                                                         \
 449         /* PCI quirks */                                                \
 450         .pci_fixup        : AT(ADDR(.pci_fixup) - LOAD_OFFSET) {        \
 451                 __start_pci_fixups_early = .;                           \
 452                 KEEP(*(.pci_fixup_early))                               \
 453                 __end_pci_fixups_early = .;                             \
 454                 __start_pci_fixups_header = .;                          \
 455                 KEEP(*(.pci_fixup_header))                              \
 456                 __end_pci_fixups_header = .;                            \
 457                 __start_pci_fixups_final = .;                           \
 458                 KEEP(*(.pci_fixup_final))                               \
 459                 __end_pci_fixups_final = .;                             \
 460                 __start_pci_fixups_enable = .;                          \
 461                 KEEP(*(.pci_fixup_enable))                              \
 462                 __end_pci_fixups_enable = .;                            \
 463                 __start_pci_fixups_resume = .;                          \
 464                 KEEP(*(.pci_fixup_resume))                              \
 465                 __end_pci_fixups_resume = .;                            \
 466                 __start_pci_fixups_resume_early = .;                    \
 467                 KEEP(*(.pci_fixup_resume_early))                        \
 468                 __end_pci_fixups_resume_early = .;                      \
 469                 __start_pci_fixups_suspend = .;                         \
 470                 KEEP(*(.pci_fixup_suspend))                             \
 471                 __end_pci_fixups_suspend = .;                           \
 472                 __start_pci_fixups_suspend_late = .;                    \
 473                 KEEP(*(.pci_fixup_suspend_late))                        \
 474                 __end_pci_fixups_suspend_late = .;                      \
 475         }                                                               \
 476                                                                         \
 477         /* Built-in firmware blobs */                                   \
 478         .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) ALIGN(8) {    \
 479                 __start_builtin_fw = .;                                 \
 480                 KEEP(*(.builtin_fw))                                    \
 481                 __end_builtin_fw = .;                                   \
 482         }                                                               \
 483                                                                         \
 484         TRACEDATA                                                       \
 485                                                                         \
 486         /* Kernel symbol table: Normal symbols */                       \
 487         __ksymtab         : AT(ADDR(__ksymtab) - LOAD_OFFSET) {         \
 488                 __start___ksymtab = .;                                  \
 489                 KEEP(*(SORT(___ksymtab+*)))                             \
 490                 __stop___ksymtab = .;                                   \
 491         }                                                               \
 492                                                                         \
 493         /* Kernel symbol table: GPL-only symbols */                     \
 494         __ksymtab_gpl     : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) {     \
 495                 __start___ksymtab_gpl = .;                              \
 496                 KEEP(*(SORT(___ksymtab_gpl+*)))                         \
 497                 __stop___ksymtab_gpl = .;                               \
 498         }                                                               \
 499                                                                         \
 500         /* Kernel symbol table: Normal symbols */                       \
 501         __kcrctab         : AT(ADDR(__kcrctab) - LOAD_OFFSET) {         \
 502                 __start___kcrctab = .;                                  \
 503                 KEEP(*(SORT(___kcrctab+*)))                             \
 504                 __stop___kcrctab = .;                                   \
 505         }                                                               \
 506                                                                         \
 507         /* Kernel symbol table: GPL-only symbols */                     \
 508         __kcrctab_gpl     : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) {     \
 509                 __start___kcrctab_gpl = .;                              \
 510                 KEEP(*(SORT(___kcrctab_gpl+*)))                         \
 511                 __stop___kcrctab_gpl = .;                               \
 512         }                                                               \
 513                                                                         \
 514         /* Kernel symbol table: strings */                              \
 515         __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
 516                 *(__ksymtab_strings)                                    \
 517         }                                                               \
 518                                                                         \
 519         /* __*init sections */                                          \
 520         __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) {         \
 521                 *(.ref.rodata)                                          \
 522                 MEM_KEEP(init.rodata)                                   \
 523                 MEM_KEEP(exit.rodata)                                   \
 524         }                                                               \
 525                                                                         \
 526         /* Built-in module parameters. */                               \
 527         __param : AT(ADDR(__param) - LOAD_OFFSET) {                     \
 528                 __start___param = .;                                    \
 529                 KEEP(*(__param))                                        \
 530                 __stop___param = .;                                     \
 531         }                                                               \
 532                                                                         \
 533         /* Built-in module versions. */                                 \
 534         __modver : AT(ADDR(__modver) - LOAD_OFFSET) {                   \
 535                 __start___modver = .;                                   \
 536                 KEEP(*(__modver))                                       \
 537                 __stop___modver = .;                                    \
 538         }                                                               \
 539                                                                         \
 540         RO_EXCEPTION_TABLE                                              \
 541         NOTES                                                           \
 542         BTF                                                             \
 543                                                                         \
 544         . = ALIGN((align));                                             \
 545         __end_rodata = .;
 546
 547
 548 /*
 549  * .text..L.cfi.jumptable.* contain Control-Flow Integrity (CFI)
 550  * jump table entries.
 551  */
 552 #ifdef CONFIG_CFI_CLANG
 553 #define TEXT_CFI_JT                                                     \
 554                 . = ALIGN(PMD_SIZE);                                    \
 555                 __cfi_jt_start = .;                                     \
 556                 *(.text..L.cfi.jumptable .text..L.cfi.jumptable.*)      \
 557                 . = ALIGN(PMD_SIZE);                                    \
 558                 __cfi_jt_end = .;
 559 #else
 560 #define TEXT_CFI_JT
 561 #endif
 562
 563 /*
 564  * Non-instrumentable text section
 565  */
 566 #define NOINSTR_TEXT                                                    \
 567                 ALIGN_FUNCTION();                                       \
 568                 __noinstr_text_start = .;                               \
 569                 *(.noinstr.text)                                        \
 570                 __noinstr_text_end = .;
 571
 572 /*
 573  * .text section. Map to function alignment to avoid address changes
 574  * during second ld run in second ld pass when generating System.map
 575  *
 576  * TEXT_MAIN here will match .text.fixup and .text.unlikely if dead
 577  * code elimination is enabled, so these sections should be converted
 578  * to use ".." first.
 579  */
 580 #define TEXT_TEXT                                                       \
 581                 ALIGN_FUNCTION();                                       \
 582                 *(.text.hot .text.hot.*)                                \
 583                 *(TEXT_MAIN .text.fixup)                                \
 584                 *(.text.unlikely .text.unlikely.*)                      \
 585                 *(.text.unknown .text.unknown.*)                        \
 586                 NOINSTR_TEXT                                            \
 587                 *(.text..refcount)                                      \
 588                 *(.ref.text)                                            \
 589                 TEXT_CFI_JT                                             \
 590         MEM_KEEP(init.text*)                                            \
 591         MEM_KEEP(exit.text*)                                            \
 592
 593
 594 /* sched.text is aling to function alignment to secure we have same
 595  * address even at second ld pass when generating System.map */
 596 #define SCHED_TEXT                                                      \
 597                 ALIGN_FUNCTION();                                       \
 598                 __sched_text_start = .;                                 \
 599                 *(.sched.text)                                          \
 600                 __sched_text_end = .;
 601
 602 /* spinlock.text is aling to function alignment to secure we have same
 603  * address even at second ld pass when generating System.map */
 604 #define LOCK_TEXT                                                       \
 605                 ALIGN_FUNCTION();                                       \
 606                 __lock_text_start = .;                                  \
 607                 *(.spinlock.text)                                       \
 608                 __lock_text_end = .;
 609
 610 #define CPUIDLE_TEXT                                                    \
 611                 ALIGN_FUNCTION();                                       \
 612                 __cpuidle_text_start = .;                               \
 613                 *(.cpuidle.text)                                        \
 614                 __cpuidle_text_end = .;
 615
 616 #define KPROBES_TEXT                                                    \
 617                 ALIGN_FUNCTION();                                       \
 618                 __kprobes_text_start = .;                               \
 619                 *(.kprobes.text)                                        \
 620                 __kprobes_text_end = .;
 621
 622 #define ENTRY_TEXT                                                      \
 623                 ALIGN_FUNCTION();                                       \
 624                 __entry_text_start = .;                                 \
 625                 *(.entry.text)                                          \
 626                 __entry_text_end = .;
 627
 628 #define IRQENTRY_TEXT                                                   \
 629                 ALIGN_FUNCTION();                                       \
 630                 __irqentry_text_start = .;                              \
 631                 *(.irqentry.text)                                       \
 632                 __irqentry_text_end = .;
 633
 634 #define SOFTIRQENTRY_TEXT                                               \
 635                 ALIGN_FUNCTION();                                       \
 636                 __softirqentry_text_start = .;                          \
 637                 *(.softirqentry.text)                                   \
 638                 __softirqentry_text_end = .;
 639
 640 #define STATIC_CALL_TEXT                                                \
 641                 ALIGN_FUNCTION();                                       \
 642                 __static_call_text_start = .;                           \
 643                 *(.static_call.text)                                    \
 644                 __static_call_text_end = .;
 645
 646 /* Section used for early init (in .S files) */
 647 #define HEAD_TEXT  KEEP(*(.head.text))
 648
 649 #define HEAD_TEXT_SECTION                                                       \
 650         .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) {               \
 651                 HEAD_TEXT                                               \
 652         }
 653
 654 /*
 655  * Exception table
 656  */
 657 #define EXCEPTION_TABLE(align)                                          \
 658         . = ALIGN(align);                                               \
 659         __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {               \
 660                 __start___ex_table = .;                                 \
 661                 KEEP(*(__ex_table))                                     \
 662                 __stop___ex_table = .;                                  \
 663         }
 664
 665 /*
 666  * .BTF
 667  */
 668 #ifdef CONFIG_DEBUG_INFO_BTF
 669 #define BTF                                                             \
 670         .BTF : AT(ADDR(.BTF) - LOAD_OFFSET) {                           \
 671                 __start_BTF = .;                                        \
 672                 KEEP(*(.BTF))                                           \
 673                 __stop_BTF = .;                                         \
 674         }                                                               \
 675         . = ALIGN(4);                                                   \
 676         .BTF_ids : AT(ADDR(.BTF_ids) - LOAD_OFFSET) {                   \
 677                 *(.BTF_ids)                                             \
 678         }
 679 #else
 680 #define BTF
 681 #endif
 682
 683 /*
 684  * Init task
 685  */
 686 #define INIT_TASK_DATA_SECTION(align)                                   \
 687         . = ALIGN(align);                                               \
 688         .data..init_task :  AT(ADDR(.data..init_task) - LOAD_OFFSET) {  \
 689                 INIT_TASK_DATA(align)                                   \
 690         }
 691
 692 #ifdef CONFIG_CONSTRUCTORS
 693 #define KERNEL_CTORS()  . = ALIGN(8);                      \
 694                         __ctors_start = .;                 \
 695                         KEEP(*(SORT(.ctors.*)))            \
 696                         KEEP(*(.ctors))                    \
 697                         KEEP(*(SORT(.init_array.*)))       \
 698                         KEEP(*(.init_array))               \
 699                         __ctors_end = .;
 700 #else
 701 #define KERNEL_CTORS()
 702 #endif
 703
 704 /* init and exit section handling */
 705 #define INIT_DATA                                                       \
 706         KEEP(*(SORT(___kentry+*)))                                      \
 707         *(.init.data init.data.*)                                       \
 708         MEM_DISCARD(init.data*)                                         \
 709         KERNEL_CTORS()                                                  \
 710         MCOUNT_REC()                                                    \
 711         *(.init.rodata .init.rodata.*)                                  \
 712         FTRACE_EVENTS()                                                 \
 713         TRACE_SYSCALLS()                                                \
 714         KPROBE_BLACKLIST()                                              \
 715         ERROR_INJECT_WHITELIST()                                        \
 716         MEM_DISCARD(init.rodata)                                        \
 717         CLK_OF_TABLES()                                                 \
 718         RESERVEDMEM_OF_TABLES()                                         \
 719         TIMER_OF_TABLES()                                               \
 720         CPU_METHOD_OF_TABLES()                                          \
 721         CPUIDLE_METHOD_OF_TABLES()                                      \
 722         KERNEL_DTB()                                                    \
 723         IRQCHIP_OF_MATCH_TABLE()                                        \
 724         ACPI_PROBE_TABLE(irqchip)                                       \
 725         ACPI_PROBE_TABLE(timer)                                         \
 726         THERMAL_TABLE(governor)                                         \
 727         DTPM_TABLE()                                                    \
 728         EARLYCON_TABLE()                                                \
 729         LSM_TABLE()                                                     \
 730         EARLY_LSM_TABLE()                                               \
 731         KUNIT_TABLE()
 732
 733 #define INIT_TEXT                                                       \
 734         *(.init.text .init.text.*)                                      \
 735         *(.text.startup)                                                \
 736         MEM_DISCARD(init.text*)
 737
 738 #define EXIT_DATA                                                       \
 739         *(.exit.data .exit.data.*)                                      \
 740         *(.fini_array .fini_array.*)                                    \
 741         *(.dtors .dtors.*)                                              \
 742         MEM_DISCARD(exit.data*)                                         \
 743         MEM_DISCARD(exit.rodata*)
 744
 745 #define EXIT_TEXT                                                       \
 746         *(.exit.text)                                                   \
 747         *(.text.exit)                                                   \
 748         MEM_DISCARD(exit.text)
 749
 750 #define EXIT_CALL                                                       \
 751         *(.exitcall.exit)
 752
 753 /*
 754  * bss (Block Started by Symbol) - uninitialized data
 755  * zeroed during startup
 756  */
 757 #define SBSS(sbss_align)                                                \
 758         . = ALIGN(sbss_align);                                          \
 759         .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) {                         \
 760                 *(.dynsbss)                                             \
 761                 *(SBSS_MAIN)                                            \
 762                 *(.scommon)                                             \
 763         }
 764
 765 /*
 766  * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra
 767  * sections to the front of bss.
 768  */
 769 #ifndef BSS_FIRST_SECTIONS
 770 #define BSS_FIRST_SECTIONS
 771 #endif
 772
 773 #define BSS(bss_align)                                                  \
 774         . = ALIGN(bss_align);                                           \
 775         .bss : AT(ADDR(.bss) - LOAD_OFFSET) {                           \
 776                 BSS_FIRST_SECTIONS                                      \
 777                 . = ALIGN(PAGE_SIZE);                                   \
 778                 *(.bss..page_aligned)                                   \
 779                 . = ALIGN(PAGE_SIZE);                                   \
 780                 *(.dynbss)                                              \
 781                 *(BSS_MAIN)                                             \
 782                 *(COMMON)                                               \
 783         }
 784
 785 /*
 786  * DWARF debug sections.
 787  * Symbols in the DWARF debugging sections are relative to
 788  * the beginning of the section so we begin them at 0.
 789  */
 790 #define DWARF_DEBUG                                                     \
 791                 /* DWARF 1 */                                           \
 792                 .debug          0 : { *(.debug) }                       \
 793                 .line           0 : { *(.line) }                        \
 794                 /* GNU DWARF 1 extensions */                            \
 795                 .debug_srcinfo  0 : { *(.debug_srcinfo) }               \
 796                 .debug_sfnames  0 : { *(.debug_sfnames) }               \
 797                 /* DWARF 1.1 and DWARF 2 */                             \
 798                 .debug_aranges  0 : { *(.debug_aranges) }               \
 799                 .debug_pubnames 0 : { *(.debug_pubnames) }              \
 800                 /* DWARF 2 */                                           \
 801                 .debug_info     0 : { *(.debug_info                     \
 802                                 .gnu.linkonce.wi.*) }                   \
 803                 .debug_abbrev   0 : { *(.debug_abbrev) }                \
 804                 .debug_line     0 : { *(.debug_line) }                  \
 805                 .debug_frame    0 : { *(.debug_frame) }                 \
 806                 .debug_str      0 : { *(.debug_str) }                   \
 807                 .debug_loc      0 : { *(.debug_loc) }                   \
 808                 .debug_macinfo  0 : { *(.debug_macinfo) }               \
 809                 .debug_pubtypes 0 : { *(.debug_pubtypes) }              \
 810                 /* DWARF 3 */                                           \
 811                 .debug_ranges   0 : { *(.debug_ranges) }                \
 812                 /* SGI/MIPS DWARF 2 extensions */                       \
 813                 .debug_weaknames 0 : { *(.debug_weaknames) }            \
 814                 .debug_funcnames 0 : { *(.debug_funcnames) }            \
 815                 .debug_typenames 0 : { *(.debug_typenames) }            \
 816                 .debug_varnames  0 : { *(.debug_varnames) }             \
 817                 /* GNU DWARF 2 extensions */                            \
 818                 .debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) }      \
 819                 .debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) }      \
 820                 /* DWARF 4 */                                           \
 821                 .debug_types    0 : { *(.debug_types) }                 \
 822                 /* DWARF 5 */                                           \
 823                 .debug_addr     0 : { *(.debug_addr) }                  \
 824                 .debug_line_str 0 : { *(.debug_line_str) }              \
 825                 .debug_loclists 0 : { *(.debug_loclists) }              \
 826                 .debug_macro    0 : { *(.debug_macro) }                 \
 827                 .debug_names    0 : { *(.debug_names) }                 \
 828                 .debug_rnglists 0 : { *(.debug_rnglists) }              \
 829                 .debug_str_offsets      0 : { *(.debug_str_offsets) }
 830
 831 /* Stabs debugging sections. */
 832 #define STABS_DEBUG                                                     \
 833                 .stab 0 : { *(.stab) }                                  \
 834                 .stabstr 0 : { *(.stabstr) }                            \
 835                 .stab.excl 0 : { *(.stab.excl) }                        \
 836                 .stab.exclstr 0 : { *(.stab.exclstr) }                  \
 837                 .stab.index 0 : { *(.stab.index) }                      \
 838                 .stab.indexstr 0 : { *(.stab.indexstr) }
 839
 840 /* Required sections not related to debugging. */
 841 #define ELF_DETAILS                                                     \
 842                 .comment 0 : { *(.comment) }                            \
 843                 .symtab 0 : { *(.symtab) }                              \
 844                 .strtab 0 : { *(.strtab) }                              \
 845                 .shstrtab 0 : { *(.shstrtab) }
 846
 847 #ifdef CONFIG_GENERIC_BUG
 848 #define BUG_TABLE                                                       \
 849         . = ALIGN(8);                                                   \
 850         __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) {             \
 851                 __start___bug_table = .;                                \
 852                 KEEP(*(__bug_table))                                    \
 853                 __stop___bug_table = .;                                 \
 854         }
 855 #else
 856 #define BUG_TABLE
 857 #endif
 858
 859 #ifdef CONFIG_UNWINDER_ORC
 860 #define ORC_UNWIND_TABLE                                                \
 861         . = ALIGN(4);                                                   \
 862         .orc_unwind_ip : AT(ADDR(.orc_unwind_ip) - LOAD_OFFSET) {       \
 863                 __start_orc_unwind_ip = .;                              \
 864                 KEEP(*(.orc_unwind_ip))                                 \
 865                 __stop_orc_unwind_ip = .;                               \
 866         }                                                               \
 867         . = ALIGN(2);                                                   \
 868         .orc_unwind : AT(ADDR(.orc_unwind) - LOAD_OFFSET) {             \
 869                 __start_orc_unwind = .;                                 \
 870                 KEEP(*(.orc_unwind))                                    \
 871                 __stop_orc_unwind = .;                                  \
 872         }                                                               \
 873         . = ALIGN(4);                                                   \
 874         .orc_lookup : AT(ADDR(.orc_lookup) - LOAD_OFFSET) {             \
 875                 orc_lookup = .;                                         \
 876                 . += (((SIZEOF(.text) + LOOKUP_BLOCK_SIZE - 1) /        \
 877                         LOOKUP_BLOCK_SIZE) + 1) * 4;                    \
 878                 orc_lookup_end = .;                                     \
 879         }
 880 #else
 881 #define ORC_UNWIND_TABLE
 882 #endif
 883
 884 #ifdef CONFIG_PM_TRACE
 885 #define TRACEDATA                                                       \
 886         . = ALIGN(4);                                                   \
 887         .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) {               \
 888                 __tracedata_start = .;                                  \
 889                 KEEP(*(.tracedata))                                     \
 890                 __tracedata_end = .;                                    \
 891         }
 892 #else
 893 #define TRACEDATA
 894 #endif
 895
 896 #define NOTES                                                           \
 897         .notes : AT(ADDR(.notes) - LOAD_OFFSET) {                       \
 898                 __start_notes = .;                                      \
 899                 KEEP(*(.note.*))                                        \
 900                 __stop_notes = .;                                       \
 901         } NOTES_HEADERS                                                 \
 902         NOTES_HEADERS_RESTORE
 903
 904 #define INIT_SETUP(initsetup_align)                                     \
 905                 . = ALIGN(initsetup_align);                             \
 906                 __setup_start = .;                                      \
 907                 KEEP(*(.init.setup))                                    \
 908                 __setup_end = .;
 909
 910 #define INIT_CALLS_LEVEL(level)                                         \
 911                 __initcall##level##_start = .;                          \
 912                 KEEP(*(.initcall##level##.init))                        \
 913                 KEEP(*(.initcall##level##s.init))                       \
 914
 915 #define INIT_CALLS                                                      \
 916                 __initcall_start = .;                                   \
 917                 KEEP(*(.initcallearly.init))                            \
 918                 INIT_CALLS_LEVEL(0)                                     \
 919                 INIT_CALLS_LEVEL(1)                                     \
 920                 INIT_CALLS_LEVEL(2)                                     \
 921                 INIT_CALLS_LEVEL(3)                                     \
 922                 INIT_CALLS_LEVEL(4)                                     \
 923                 INIT_CALLS_LEVEL(5)                                     \
 924                 INIT_CALLS_LEVEL(rootfs)                                \
 925                 INIT_CALLS_LEVEL(6)                                     \
 926                 INIT_CALLS_LEVEL(7)                                     \
 927                 __initcall_end = .;
 928
 929 #define CON_INITCALL                                                    \
 930                 __con_initcall_start = .;                               \
 931                 KEEP(*(.con_initcall.init))                             \
 932                 __con_initcall_end = .;
 933
 934 /* Alignment must be consistent with (kunit_suite *) in include/kunit/test.h */
 935 #define KUNIT_TABLE()                                                   \
 936                 . = ALIGN(8);                                           \
 937                 __kunit_suites_start = .;                               \
 938                 KEEP(*(.kunit_test_suites))                             \
 939                 __kunit_suites_end = .;
 940
 941 #ifdef CONFIG_BLK_DEV_INITRD
 942 #define INIT_RAM_FS                                                     \
 943         . = ALIGN(4);                                                   \
 944         __initramfs_start = .;                                          \
 945         KEEP(*(.init.ramfs))                                            \
 946         . = ALIGN(8);                                                   \
 947         KEEP(*(.init.ramfs.info))
 948 #else
 949 #define INIT_RAM_FS
 950 #endif
 951
 952 /*
 953  * Memory encryption operates on a page basis. Since we need to clear
 954  * the memory encryption mask for this section, it needs to be aligned
 955  * on a page boundary and be a page-size multiple in length.
 956  *
 957  * Note: We use a separate section so that only this section gets
 958  * decrypted to avoid exposing more than we wish.
 959  */
 960 #ifdef CONFIG_AMD_MEM_ENCRYPT
 961 #define PERCPU_DECRYPTED_SECTION                                        \
 962         . = ALIGN(PAGE_SIZE);                                           \
 963         *(.data..decrypted)                                             \
 964         *(.data..percpu..decrypted)                                     \
 965         . = ALIGN(PAGE_SIZE);
 966 #else
 967 #define PERCPU_DECRYPTED_SECTION
 968 #endif
 969
 970
 971 /*
 972  * Default discarded sections.
 973  *
 974  * Some archs want to discard exit text/data at runtime rather than
 975  * link time due to cross-section references such as alt instructions,
 976  * bug table, eh_frame, etc.  DISCARDS must be the last of output
 977  * section definitions so that such archs put those in earlier section
 978  * definitions.
 979  */
 980 #ifdef RUNTIME_DISCARD_EXIT
 981 #define EXIT_DISCARDS
 982 #else
 983 #define EXIT_DISCARDS                                                   \
 984         EXIT_TEXT                                                       \
 985         EXIT_DATA
 986 #endif
 987
 988 /*
 989  * Clang's -fprofile-arcs, -fsanitize=kernel-address, and
 990  * -fsanitize=thread produce unwanted sections (.eh_frame
 991  * and .init_array.*), but CONFIG_CONSTRUCTORS wants to
 992  * keep any .init_array.* sections.
 993  * https://bugs.llvm.org/show_bug.cgi?id=46478
 994  */
 995 #if defined(CONFIG_GCOV_KERNEL) || defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KCSAN) || \
 996         defined(CONFIG_CFI_CLANG)
 997 # ifdef CONFIG_CONSTRUCTORS
 998 #  define SANITIZER_DISCARDS                                            \
 999         *(.eh_frame)
1000 # else
1001 #  define SANITIZER_DISCARDS                                            \
1002         *(.init_array) *(.init_array.*)                                 \
1003         *(.eh_frame)
1004 # endif
1005 #else
1006 # define SANITIZER_DISCARDS
1007 #endif
1008
1009 #define COMMON_DISCARDS                                                 \
1010         SANITIZER_DISCARDS                                              \
1011         *(.discard)                                                     \
1012         *(.discard.*)                                                   \
1013         *(.modinfo)                                                     \
1014         /* ld.bfd warns about .gnu.version* even when not emitted */    \
1015         *(.gnu.version*)                                                \
1016
1017 #define DISCARDS                                                        \
1018         /DISCARD/ : {                                                   \
1019         EXIT_DISCARDS                                                   \
1020         EXIT_CALL                                                       \
1021         COMMON_DISCARDS                                                 \
1022         }
1023
1024 /**
1025  * PERCPU_INPUT - the percpu input sections
1026  * @cacheline: cacheline size
1027  *
1028  * The core percpu section names and core symbols which do not rely
1029  * directly upon load addresses.
1030  *
1031  * @cacheline is used to align subsections to avoid false cacheline
1032  * sharing between subsections for different purposes.
1033  */
1034 #define PERCPU_INPUT(cacheline)                                         \
1035         __per_cpu_start = .;                                            \
1036         *(.data..percpu..first)                                         \
1037         . = ALIGN(PAGE_SIZE);                                           \
1038         *(.data..percpu..page_aligned)                                  \
1039         . = ALIGN(cacheline);                                           \
1040         *(.data..percpu..read_mostly)                                   \
1041         . = ALIGN(cacheline);                                           \
1042         *(.data..percpu)                                                \
1043         *(.data..percpu..shared_aligned)                                \
1044         PERCPU_DECRYPTED_SECTION                                        \
1045         __per_cpu_end = .;
1046
1047 /**
1048  * PERCPU_VADDR - define output section for percpu area
1049  * @cacheline: cacheline size
1050  * @vaddr: explicit base address (optional)
1051  * @phdr: destination PHDR (optional)
1052  *
1053  * Macro which expands to output section for percpu area.
1054  *
1055  * @cacheline is used to align subsections to avoid false cacheline
1056  * sharing between subsections for different purposes.
1057  *
1058  * If @vaddr is not blank, it specifies explicit base address and all
1059  * percpu symbols will be offset from the given address.  If blank,
1060  * @vaddr always equals @laddr + LOAD_OFFSET.
1061  *
1062  * @phdr defines the output PHDR to use if not blank.  Be warned that
1063  * output PHDR is sticky.  If @phdr is specified, the next output
1064  * section in the linker script will go there too.  @phdr should have
1065  * a leading colon.
1066  *
1067  * Note that this macros defines __per_cpu_load as an absolute symbol.
1068  * If there is no need to put the percpu section at a predetermined
1069  * address, use PERCPU_SECTION.
1070  */
1071 #define PERCPU_VADDR(cacheline, vaddr, phdr)                            \
1072         __per_cpu_load = .;                                             \
1073         .data..percpu vaddr : AT(__per_cpu_load - LOAD_OFFSET) {        \
1074                 PERCPU_INPUT(cacheline)                                 \
1075         } phdr                                                          \
1076         . = __per_cpu_load + SIZEOF(.data..percpu);
1077
1078 /**
1079  * PERCPU_SECTION - define output section for percpu area, simple version
1080  * @cacheline: cacheline size
1081  *
1082  * Align to PAGE_SIZE and outputs output section for percpu area.  This
1083  * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and
1084  * __per_cpu_start will be identical.
1085  *
1086  * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,)
1087  * except that __per_cpu_load is defined as a relative symbol against
1088  * .data..percpu which is required for relocatable x86_32 configuration.
1089  */
1090 #define PERCPU_SECTION(cacheline)                                       \
1091         . = ALIGN(PAGE_SIZE);                                           \
1092         .data..percpu   : AT(ADDR(.data..percpu) - LOAD_OFFSET) {       \
1093                 __per_cpu_load = .;                                     \
1094                 PERCPU_INPUT(cacheline)                                 \
1095         }
1096
1097
1098 /*
1099  * Definition of the high level *_SECTION macros
1100  * They will fit only a subset of the architectures
1101  */
1102
1103
1104 /*
1105  * Writeable data.
1106  * All sections are combined in a single .data section.
1107  * The sections following CONSTRUCTORS are arranged so their
1108  * typical alignment matches.
1109  * A cacheline is typical/always less than a PAGE_SIZE so
1110  * the sections that has this restriction (or similar)
1111  * is located before the ones requiring PAGE_SIZE alignment.
1112  * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
1113  * matches the requirement of PAGE_ALIGNED_DATA.
1114  *
1115  * use 0 as page_align if page_aligned data is not used */
1116 #define RW_DATA(cacheline, pagealigned, inittask)                       \
1117         . = ALIGN(PAGE_SIZE);                                           \
1118         .data : AT(ADDR(.data) - LOAD_OFFSET) {                         \
1119                 INIT_TASK_DATA(inittask)                                \
1120                 NOSAVE_DATA                                             \
1121                 PAGE_ALIGNED_DATA(pagealigned)                          \
1122                 CACHELINE_ALIGNED_DATA(cacheline)                       \
1123                 READ_MOSTLY_DATA(cacheline)                             \
1124                 DATA_DATA                                               \
1125                 CONSTRUCTORS                                            \
1126         }                                                               \
1127         BUG_TABLE                                                       \
1128
1129 #define INIT_TEXT_SECTION(inittext_align)                               \
1130         . = ALIGN(inittext_align);                                      \
1131         .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {               \
1132                 _sinittext = .;                                         \
1133                 INIT_TEXT                                               \
1134                 _einittext = .;                                         \
1135         }
1136
1137 #define INIT_DATA_SECTION(initsetup_align)                              \
1138         .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {               \
1139                 INIT_DATA                                               \
1140                 INIT_SETUP(initsetup_align)                             \
1141                 INIT_CALLS                                              \
1142                 CON_INITCALL                                            \
1143                 INIT_RAM_FS                                             \
1144         }
1145
1146 #define BSS_SECTION(sbss_align, bss_align, stop_align)                  \
1147         . = ALIGN(sbss_align);                                          \
1148         __bss_start = .;                                                \
1149         SBSS(sbss_align)                                                \
1150         BSS(bss_align)                                                  \
1151         . = ALIGN(stop_align);                                          \
1152         __bss_stop = .;