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_SECTION(PAGE_SIZE)
  27  *      RW_DATA_SECTION(...)
  28  *      _edata = .;
  29  *
  30  *      EXCEPTION_TABLE(...)
  31  *      NOTES
  32  *
  33  *      BSS_SECTION(0, 0, 0)
  34  *      _end = .;
  35  *
  36  *      STABS_DEBUG
  37  *      DWARF_DEBUG
  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 /* Align . to a 8 byte boundary equals to maximum function alignment. */
  58 #define ALIGN_FUNCTION()  . = ALIGN(8)
  59
  60 /*
  61  * LD_DEAD_CODE_DATA_ELIMINATION option enables -fdata-sections, which
  62  * generates .data.identifier sections, which need to be pulled in with
  63  * .data. We don't want to pull in .data..other sections, which Linux
  64  * has defined. Same for text and bss.
  65  *
  66  * RODATA_MAIN is not used because existing code already defines .rodata.x
  67  * sections to be brought in with rodata.
  68  */
  69 #ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
  70 #define TEXT_MAIN .text .text.[0-9a-zA-Z_]*
  71 #define DATA_MAIN .data .data.[0-9a-zA-Z_]* .data..LPBX*
  72 #define SDATA_MAIN .sdata .sdata.[0-9a-zA-Z_]*
  73 #define RODATA_MAIN .rodata .rodata.[0-9a-zA-Z_]*
  74 #define BSS_MAIN .bss .bss.[0-9a-zA-Z_]*
  75 #define SBSS_MAIN .sbss .sbss.[0-9a-zA-Z_]*
  76 #else
  77 #define TEXT_MAIN .text
  78 #define DATA_MAIN .data
  79 #define SDATA_MAIN .sdata
  80 #define RODATA_MAIN .rodata
  81 #define BSS_MAIN .bss
  82 #define SBSS_MAIN .sbss
  83 #endif
  84
  85 /*
  86  * Align to a 32 byte boundary equal to the
  87  * alignment gcc 4.5 uses for a struct
  88  */
  89 #define STRUCT_ALIGNMENT 32
  90 #define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT)
  91
  92 /* The actual configuration determine if the init/exit sections
  93  * are handled as text/data or they can be discarded (which
  94  * often happens at runtime)
  95  */
  96 #ifdef CONFIG_HOTPLUG_CPU
  97 #define CPU_KEEP(sec)    *(.cpu##sec)
  98 #define CPU_DISCARD(sec)
  99 #else
 100 #define CPU_KEEP(sec)
 101 #define CPU_DISCARD(sec) *(.cpu##sec)
 102 #endif
 103
 104 #if defined(CONFIG_MEMORY_HOTPLUG)
 105 #define MEM_KEEP(sec)    *(.mem##sec)
 106 #define MEM_DISCARD(sec)
 107 #else
 108 #define MEM_KEEP(sec)
 109 #define MEM_DISCARD(sec) *(.mem##sec)
 110 #endif
 111
 112 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
 113 #define MCOUNT_REC()    . = ALIGN(8);                           \
 114                         __start_mcount_loc = .;                 \
 115                         KEEP(*(__mcount_loc))                   \
 116                         __stop_mcount_loc = .;
 117 #else
 118 #define MCOUNT_REC()
 119 #endif
 120
 121 #ifdef CONFIG_TRACE_BRANCH_PROFILING
 122 #define LIKELY_PROFILE()        __start_annotated_branch_profile = .;   \
 123                                 KEEP(*(_ftrace_annotated_branch))       \
 124                                 __stop_annotated_branch_profile = .;
 125 #else
 126 #define LIKELY_PROFILE()
 127 #endif
 128
 129 #ifdef CONFIG_PROFILE_ALL_BRANCHES
 130 #define BRANCH_PROFILE()        __start_branch_profile = .;             \
 131                                 KEEP(*(_ftrace_branch))                 \
 132                                 __stop_branch_profile = .;
 133 #else
 134 #define BRANCH_PROFILE()
 135 #endif
 136
 137 #ifdef CONFIG_KPROBES
 138 #define KPROBE_BLACKLIST()      . = ALIGN(8);                                 \
 139                                 __start_kprobe_blacklist = .;                 \
 140                                 KEEP(*(_kprobe_blacklist))                    \
 141                                 __stop_kprobe_blacklist = .;
 142 #else
 143 #define KPROBE_BLACKLIST()
 144 #endif
 145
 146 #ifdef CONFIG_FUNCTION_ERROR_INJECTION
 147 #define ERROR_INJECT_WHITELIST()        STRUCT_ALIGN();                       \
 148                         __start_error_injection_whitelist = .;                \
 149                         KEEP(*(_error_injection_whitelist))                   \
 150                         __stop_error_injection_whitelist = .;
 151 #else
 152 #define ERROR_INJECT_WHITELIST()
 153 #endif
 154
 155 #ifdef CONFIG_EVENT_TRACING
 156 #define FTRACE_EVENTS() . = ALIGN(8);                                   \
 157                         __start_ftrace_events = .;                      \
 158                         KEEP(*(_ftrace_events))                         \
 159                         __stop_ftrace_events = .;                       \
 160                         __start_ftrace_eval_maps = .;                   \
 161                         KEEP(*(_ftrace_eval_map))                       \
 162                         __stop_ftrace_eval_maps = .;
 163 #else
 164 #define FTRACE_EVENTS()
 165 #endif
 166
 167 #ifdef CONFIG_TRACING
 168 #define TRACE_PRINTKS()  __start___trace_bprintk_fmt = .;      \
 169                          KEEP(*(__trace_printk_fmt)) /* Trace_printk fmt' pointer */ \
 170                          __stop___trace_bprintk_fmt = .;
 171 #define TRACEPOINT_STR() __start___tracepoint_str = .;  \
 172                          KEEP(*(__tracepoint_str)) /* Trace_printk fmt' pointer */ \
 173                          __stop___tracepoint_str = .;
 174 #else
 175 #define TRACE_PRINTKS()
 176 #define TRACEPOINT_STR()
 177 #endif
 178
 179 #ifdef CONFIG_FTRACE_SYSCALLS
 180 #define TRACE_SYSCALLS() . = ALIGN(8);                                  \
 181                          __start_syscalls_metadata = .;                 \
 182                          KEEP(*(__syscalls_metadata))                   \
 183                          __stop_syscalls_metadata = .;
 184 #else
 185 #define TRACE_SYSCALLS()
 186 #endif
 187
 188 #ifdef CONFIG_BPF_EVENTS
 189 #define BPF_RAW_TP() STRUCT_ALIGN();                                    \
 190                          __start__bpf_raw_tp = .;                       \
 191                          KEEP(*(__bpf_raw_tp_map))                      \
 192                          __stop__bpf_raw_tp = .;
 193 #else
 194 #define BPF_RAW_TP()
 195 #endif
 196
 197 #ifdef CONFIG_SERIAL_EARLYCON
 198 #define EARLYCON_TABLE() . = ALIGN(8);                          \
 199                          __earlycon_table = .;                  \
 200                          KEEP(*(__earlycon_table))              \
 201                          __earlycon_table_end = .;
 202 #else
 203 #define EARLYCON_TABLE()
 204 #endif
 205
 206 #ifdef CONFIG_SECURITY
 207 #define LSM_TABLE()     . = ALIGN(8);                                   \
 208                         __start_lsm_info = .;                           \
 209                         KEEP(*(.lsm_info.init))                         \
 210                         __end_lsm_info = .;
 211 #define EARLY_LSM_TABLE()       . = ALIGN(8);                           \
 212                         __start_early_lsm_info = .;                     \
 213                         KEEP(*(.early_lsm_info.init))                   \
 214                         __end_early_lsm_info = .;
 215 #else
 216 #define LSM_TABLE()
 217 #define EARLY_LSM_TABLE()
 218 #endif
 219
 220 #define ___OF_TABLE(cfg, name)  _OF_TABLE_##cfg(name)
 221 #define __OF_TABLE(cfg, name)   ___OF_TABLE(cfg, name)
 222 #define OF_TABLE(cfg, name)     __OF_TABLE(IS_ENABLED(cfg), name)
 223 #define _OF_TABLE_0(name)
 224 #define _OF_TABLE_1(name)                                               \
 225         . = ALIGN(8);                                                   \
 226         __##name##_of_table = .;                                        \
 227         KEEP(*(__##name##_of_table))                                    \
 228         KEEP(*(__##name##_of_table_end))
 229
 230 #define TIMER_OF_TABLES()       OF_TABLE(CONFIG_TIMER_OF, timer)
 231 #define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip)
 232 #define CLK_OF_TABLES()         OF_TABLE(CONFIG_COMMON_CLK, clk)
 233 #define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem)
 234 #define CPU_METHOD_OF_TABLES()  OF_TABLE(CONFIG_SMP, cpu_method)
 235 #define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method)
 236
 237 #ifdef CONFIG_ACPI
 238 #define ACPI_PROBE_TABLE(name)                                          \
 239         . = ALIGN(8);                                                   \
 240         __##name##_acpi_probe_table = .;                                \
 241         KEEP(*(__##name##_acpi_probe_table))                            \
 242         __##name##_acpi_probe_table_end = .;
 243 #else
 244 #define ACPI_PROBE_TABLE(name)
 245 #endif
 246
 247 #define KERNEL_DTB()                                                    \
 248         STRUCT_ALIGN();                                                 \
 249         __dtb_start = .;                                                \
 250         KEEP(*(.dtb.init.rodata))                                       \
 251         __dtb_end = .;
 252
 253 /*
 254  * .data section
 255  */
 256 #define DATA_DATA                                                       \
 257         *(.xiptext)                                                     \
 258         *(DATA_MAIN)                                                    \
 259         *(.ref.data)                                                    \
 260         *(.data..shared_aligned) /* percpu related */                   \
 261         MEM_KEEP(init.data*)                                            \
 262         MEM_KEEP(exit.data*)                                            \
 263         *(.data.unlikely)                                               \
 264         __start_once = .;                                               \
 265         *(.data.once)                                                   \
 266         __end_once = .;                                                 \
 267         STRUCT_ALIGN();                                                 \
 268         *(__tracepoints)                                                \
 269         /* implement dynamic printk debug */                            \
 270         . = ALIGN(8);                                                   \
 271         __start___verbose = .;                                          \
 272         KEEP(*(__verbose))                                              \
 273         __stop___verbose = .;                                           \
 274         LIKELY_PROFILE()                                                \
 275         BRANCH_PROFILE()                                                \
 276         TRACE_PRINTKS()                                                 \
 277         BPF_RAW_TP()                                                    \
 278         TRACEPOINT_STR()
 279
 280 /*
 281  * Data section helpers
 282  */
 283 #define NOSAVE_DATA                                                     \
 284         . = ALIGN(PAGE_SIZE);                                           \
 285         __nosave_begin = .;                                             \
 286         *(.data..nosave)                                                \
 287         . = ALIGN(PAGE_SIZE);                                           \
 288         __nosave_end = .;
 289
 290 #define PAGE_ALIGNED_DATA(page_align)                                   \
 291         . = ALIGN(page_align);                                          \
 292         *(.data..page_aligned)
 293
 294 #define READ_MOSTLY_DATA(align)                                         \
 295         . = ALIGN(align);                                               \
 296         *(.data..read_mostly)                                           \
 297         . = ALIGN(align);
 298
 299 #define CACHELINE_ALIGNED_DATA(align)                                   \
 300         . = ALIGN(align);                                               \
 301         *(.data..cacheline_aligned)
 302
 303 #define INIT_TASK_DATA(align)                                           \
 304         . = ALIGN(align);                                               \
 305         __start_init_task = .;                                          \
 306         init_thread_union = .;                                          \
 307         init_stack = .;                                                 \
 308         KEEP(*(.data..init_task))                                       \
 309         KEEP(*(.data..init_thread_info))                                \
 310         . = __start_init_task + THREAD_SIZE;                            \
 311         __end_init_task = .;
 312
 313 #define JUMP_TABLE_DATA                                                 \
 314         . = ALIGN(8);                                                   \
 315         __start___jump_table = .;                                       \
 316         KEEP(*(__jump_table))                                           \
 317         __stop___jump_table = .;
 318
 319 /*
 320  * Allow architectures to handle ro_after_init data on their
 321  * own by defining an empty RO_AFTER_INIT_DATA.
 322  */
 323 #ifndef RO_AFTER_INIT_DATA
 324 #define RO_AFTER_INIT_DATA                                              \
 325         __start_ro_after_init = .;                                      \
 326         *(.data..ro_after_init)                                         \
 327         JUMP_TABLE_DATA                                                 \
 328         __end_ro_after_init = .;
 329 #endif
 330
 331 /*
 332  * Read only Data
 333  */
 334 #define RO_DATA_SECTION(align)                                          \
 335         . = ALIGN((align));                                             \
 336         .rodata           : AT(ADDR(.rodata) - LOAD_OFFSET) {           \
 337                 __start_rodata = .;                                     \
 338                 *(.rodata) *(.rodata.*)                                 \
 339                 RO_AFTER_INIT_DATA      /* Read only after init */      \
 340                 . = ALIGN(8);                                           \
 341                 __start___tracepoints_ptrs = .;                         \
 342                 KEEP(*(__tracepoints_ptrs)) /* Tracepoints: pointer array */ \
 343                 __stop___tracepoints_ptrs = .;                          \
 344                 *(__tracepoints_strings)/* Tracepoints: strings */      \
 345         }                                                               \
 346                                                                         \
 347         .rodata1          : AT(ADDR(.rodata1) - LOAD_OFFSET) {          \
 348                 *(.rodata1)                                             \
 349         }                                                               \
 350                                                                         \
 351         /* PCI quirks */                                                \
 352         .pci_fixup        : AT(ADDR(.pci_fixup) - LOAD_OFFSET) {        \
 353                 __start_pci_fixups_early = .;                           \
 354                 KEEP(*(.pci_fixup_early))                               \
 355                 __end_pci_fixups_early = .;                             \
 356                 __start_pci_fixups_header = .;                          \
 357                 KEEP(*(.pci_fixup_header))                              \
 358                 __end_pci_fixups_header = .;                            \
 359                 __start_pci_fixups_final = .;                           \
 360                 KEEP(*(.pci_fixup_final))                               \
 361                 __end_pci_fixups_final = .;                             \
 362                 __start_pci_fixups_enable = .;                          \
 363                 KEEP(*(.pci_fixup_enable))                              \
 364                 __end_pci_fixups_enable = .;                            \
 365                 __start_pci_fixups_resume = .;                          \
 366                 KEEP(*(.pci_fixup_resume))                              \
 367                 __end_pci_fixups_resume = .;                            \
 368                 __start_pci_fixups_resume_early = .;                    \
 369                 KEEP(*(.pci_fixup_resume_early))                        \
 370                 __end_pci_fixups_resume_early = .;                      \
 371                 __start_pci_fixups_suspend = .;                         \
 372                 KEEP(*(.pci_fixup_suspend))                             \
 373                 __end_pci_fixups_suspend = .;                           \
 374                 __start_pci_fixups_suspend_late = .;                    \
 375                 KEEP(*(.pci_fixup_suspend_late))                        \
 376                 __end_pci_fixups_suspend_late = .;                      \
 377         }                                                               \
 378                                                                         \
 379         /* Built-in firmware blobs */                                   \
 380         .builtin_fw        : AT(ADDR(.builtin_fw) - LOAD_OFFSET) {      \
 381                 __start_builtin_fw = .;                                 \
 382                 KEEP(*(.builtin_fw))                                    \
 383                 __end_builtin_fw = .;                                   \
 384         }                                                               \
 385                                                                         \
 386         TRACEDATA                                                       \
 387                                                                         \
 388         /* Kernel symbol table: Normal symbols */                       \
 389         __ksymtab         : AT(ADDR(__ksymtab) - LOAD_OFFSET) {         \
 390                 __start___ksymtab = .;                                  \
 391                 KEEP(*(SORT(___ksymtab+*)))                             \
 392                 __stop___ksymtab = .;                                   \
 393         }                                                               \
 394                                                                         \
 395         /* Kernel symbol table: GPL-only symbols */                     \
 396         __ksymtab_gpl     : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) {     \
 397                 __start___ksymtab_gpl = .;                              \
 398                 KEEP(*(SORT(___ksymtab_gpl+*)))                         \
 399                 __stop___ksymtab_gpl = .;                               \
 400         }                                                               \
 401                                                                         \
 402         /* Kernel symbol table: Normal unused symbols */                \
 403         __ksymtab_unused  : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) {  \
 404                 __start___ksymtab_unused = .;                           \
 405                 KEEP(*(SORT(___ksymtab_unused+*)))                      \
 406                 __stop___ksymtab_unused = .;                            \
 407         }                                                               \
 408                                                                         \
 409         /* Kernel symbol table: GPL-only unused symbols */              \
 410         __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
 411                 __start___ksymtab_unused_gpl = .;                       \
 412                 KEEP(*(SORT(___ksymtab_unused_gpl+*)))                  \
 413                 __stop___ksymtab_unused_gpl = .;                        \
 414         }                                                               \
 415                                                                         \
 416         /* Kernel symbol table: GPL-future-only symbols */              \
 417         __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
 418                 __start___ksymtab_gpl_future = .;                       \
 419                 KEEP(*(SORT(___ksymtab_gpl_future+*)))                  \
 420                 __stop___ksymtab_gpl_future = .;                        \
 421         }                                                               \
 422                                                                         \
 423         /* Kernel symbol table: Normal symbols */                       \
 424         __kcrctab         : AT(ADDR(__kcrctab) - LOAD_OFFSET) {         \
 425                 __start___kcrctab = .;                                  \
 426                 KEEP(*(SORT(___kcrctab+*)))                             \
 427                 __stop___kcrctab = .;                                   \
 428         }                                                               \
 429                                                                         \
 430         /* Kernel symbol table: GPL-only symbols */                     \
 431         __kcrctab_gpl     : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) {     \
 432                 __start___kcrctab_gpl = .;                              \
 433                 KEEP(*(SORT(___kcrctab_gpl+*)))                         \
 434                 __stop___kcrctab_gpl = .;                               \
 435         }                                                               \
 436                                                                         \
 437         /* Kernel symbol table: Normal unused symbols */                \
 438         __kcrctab_unused  : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) {  \
 439                 __start___kcrctab_unused = .;                           \
 440                 KEEP(*(SORT(___kcrctab_unused+*)))                      \
 441                 __stop___kcrctab_unused = .;                            \
 442         }                                                               \
 443                                                                         \
 444         /* Kernel symbol table: GPL-only unused symbols */              \
 445         __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
 446                 __start___kcrctab_unused_gpl = .;                       \
 447                 KEEP(*(SORT(___kcrctab_unused_gpl+*)))                  \
 448                 __stop___kcrctab_unused_gpl = .;                        \
 449         }                                                               \
 450                                                                         \
 451         /* Kernel symbol table: GPL-future-only symbols */              \
 452         __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
 453                 __start___kcrctab_gpl_future = .;                       \
 454                 KEEP(*(SORT(___kcrctab_gpl_future+*)))                  \
 455                 __stop___kcrctab_gpl_future = .;                        \
 456         }                                                               \
 457                                                                         \
 458         /* Kernel symbol table: strings */                              \
 459         __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
 460                 *(__ksymtab_strings)                                    \
 461         }                                                               \
 462                                                                         \
 463         /* __*init sections */                                          \
 464         __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) {         \
 465                 *(.ref.rodata)                                          \
 466                 MEM_KEEP(init.rodata)                                   \
 467                 MEM_KEEP(exit.rodata)                                   \
 468         }                                                               \
 469                                                                         \
 470         /* Built-in module parameters. */                               \
 471         __param : AT(ADDR(__param) - LOAD_OFFSET) {                     \
 472                 __start___param = .;                                    \
 473                 KEEP(*(__param))                                        \
 474                 __stop___param = .;                                     \
 475         }                                                               \
 476                                                                         \
 477         /* Built-in module versions. */                                 \
 478         __modver : AT(ADDR(__modver) - LOAD_OFFSET) {                   \
 479                 __start___modver = .;                                   \
 480                 KEEP(*(__modver))                                       \
 481                 __stop___modver = .;                                    \
 482                 . = ALIGN((align));                                     \
 483                 __end_rodata = .;                                       \
 484         }                                                               \
 485         . = ALIGN((align));
 486
 487 /* RODATA & RO_DATA provided for backward compatibility.
 488  * All archs are supposed to use RO_DATA() */
 489 #define RODATA          RO_DATA_SECTION(4096)
 490 #define RO_DATA(align)  RO_DATA_SECTION(align)
 491
 492 /*
 493  * .text section. Map to function alignment to avoid address changes
 494  * during second ld run in second ld pass when generating System.map
 495  *
 496  * TEXT_MAIN here will match .text.fixup and .text.unlikely if dead
 497  * code elimination is enabled, so these sections should be converted
 498  * to use ".." first.
 499  */
 500 #define TEXT_TEXT                                                       \
 501                 ALIGN_FUNCTION();                                       \
 502                 *(.text.hot TEXT_MAIN .text.fixup .text.unlikely)       \
 503                 *(.text..refcount)                                      \
 504                 *(.ref.text)                                            \
 505         MEM_KEEP(init.text*)                                            \
 506         MEM_KEEP(exit.text*)                                            \
 507
 508
 509 /* sched.text is aling to function alignment to secure we have same
 510  * address even at second ld pass when generating System.map */
 511 #define SCHED_TEXT                                                      \
 512                 ALIGN_FUNCTION();                                       \
 513                 __sched_text_start = .;                                 \
 514                 *(.sched.text)                                          \
 515                 __sched_text_end = .;
 516
 517 /* spinlock.text is aling to function alignment to secure we have same
 518  * address even at second ld pass when generating System.map */
 519 #define LOCK_TEXT                                                       \
 520                 ALIGN_FUNCTION();                                       \
 521                 __lock_text_start = .;                                  \
 522                 *(.spinlock.text)                                       \
 523                 __lock_text_end = .;
 524
 525 #define CPUIDLE_TEXT                                                    \
 526                 ALIGN_FUNCTION();                                       \
 527                 __cpuidle_text_start = .;                               \
 528                 *(.cpuidle.text)                                        \
 529                 __cpuidle_text_end = .;
 530
 531 #define KPROBES_TEXT                                                    \
 532                 ALIGN_FUNCTION();                                       \
 533                 __kprobes_text_start = .;                               \
 534                 *(.kprobes.text)                                        \
 535                 __kprobes_text_end = .;
 536
 537 #define ENTRY_TEXT                                                      \
 538                 ALIGN_FUNCTION();                                       \
 539                 __entry_text_start = .;                                 \
 540                 *(.entry.text)                                          \
 541                 __entry_text_end = .;
 542
 543 #define IRQENTRY_TEXT                                                   \
 544                 ALIGN_FUNCTION();                                       \
 545                 __irqentry_text_start = .;                              \
 546                 *(.irqentry.text)                                       \
 547                 __irqentry_text_end = .;
 548
 549 #define SOFTIRQENTRY_TEXT                                               \
 550                 ALIGN_FUNCTION();                                       \
 551                 __softirqentry_text_start = .;                          \
 552                 *(.softirqentry.text)                                   \
 553                 __softirqentry_text_end = .;
 554
 555 /* Section used for early init (in .S files) */
 556 #define HEAD_TEXT  KEEP(*(.head.text))
 557
 558 #define HEAD_TEXT_SECTION                                                       \
 559         .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) {               \
 560                 HEAD_TEXT                                               \
 561         }
 562
 563 /*
 564  * Exception table
 565  */
 566 #define EXCEPTION_TABLE(align)                                          \
 567         . = ALIGN(align);                                               \
 568         __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {               \
 569                 __start___ex_table = .;                                 \
 570                 KEEP(*(__ex_table))                                     \
 571                 __stop___ex_table = .;                                  \
 572         }
 573
 574 /*
 575  * Init task
 576  */
 577 #define INIT_TASK_DATA_SECTION(align)                                   \
 578         . = ALIGN(align);                                               \
 579         .data..init_task :  AT(ADDR(.data..init_task) - LOAD_OFFSET) {  \
 580                 INIT_TASK_DATA(align)                                   \
 581         }
 582
 583 #ifdef CONFIG_CONSTRUCTORS
 584 #define KERNEL_CTORS()  . = ALIGN(8);                      \
 585                         __ctors_start = .;                 \
 586                         KEEP(*(.ctors))                    \
 587                         KEEP(*(SORT(.init_array.*)))       \
 588                         KEEP(*(.init_array))               \
 589                         __ctors_end = .;
 590 #else
 591 #define KERNEL_CTORS()
 592 #endif
 593
 594 /* init and exit section handling */
 595 #define INIT_DATA                                                       \
 596         KEEP(*(SORT(___kentry+*)))                                      \
 597         *(.init.data init.data.*)                                       \
 598         MEM_DISCARD(init.data*)                                         \
 599         KERNEL_CTORS()                                                  \
 600         MCOUNT_REC()                                                    \
 601         *(.init.rodata .init.rodata.*)                                  \
 602         FTRACE_EVENTS()                                                 \
 603         TRACE_SYSCALLS()                                                \
 604         KPROBE_BLACKLIST()                                              \
 605         ERROR_INJECT_WHITELIST()                                        \
 606         MEM_DISCARD(init.rodata)                                        \
 607         CLK_OF_TABLES()                                                 \
 608         RESERVEDMEM_OF_TABLES()                                         \
 609         TIMER_OF_TABLES()                                               \
 610         CPU_METHOD_OF_TABLES()                                          \
 611         CPUIDLE_METHOD_OF_TABLES()                                      \
 612         KERNEL_DTB()                                                    \
 613         IRQCHIP_OF_MATCH_TABLE()                                        \
 614         ACPI_PROBE_TABLE(irqchip)                                       \
 615         ACPI_PROBE_TABLE(timer)                                         \
 616         EARLYCON_TABLE()                                                \
 617         LSM_TABLE()                                                     \
 618         EARLY_LSM_TABLE()
 619
 620 #define INIT_TEXT                                                       \
 621         *(.init.text .init.text.*)                                      \
 622         *(.text.startup)                                                \
 623         MEM_DISCARD(init.text*)
 624
 625 #define EXIT_DATA                                                       \
 626         *(.exit.data .exit.data.*)                                      \
 627         *(.fini_array .fini_array.*)                                    \
 628         *(.dtors .dtors.*)                                              \
 629         MEM_DISCARD(exit.data*)                                         \
 630         MEM_DISCARD(exit.rodata*)
 631
 632 #define EXIT_TEXT                                                       \
 633         *(.exit.text)                                                   \
 634         *(.text.exit)                                                   \
 635         MEM_DISCARD(exit.text)
 636
 637 #define EXIT_CALL                                                       \
 638         *(.exitcall.exit)
 639
 640 /*
 641  * bss (Block Started by Symbol) - uninitialized data
 642  * zeroed during startup
 643  */
 644 #define SBSS(sbss_align)                                                \
 645         . = ALIGN(sbss_align);                                          \
 646         .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) {                         \
 647                 *(.dynsbss)                                             \
 648                 *(SBSS_MAIN)                                            \
 649                 *(.scommon)                                             \
 650         }
 651
 652 /*
 653  * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra
 654  * sections to the front of bss.
 655  */
 656 #ifndef BSS_FIRST_SECTIONS
 657 #define BSS_FIRST_SECTIONS
 658 #endif
 659
 660 #define BSS(bss_align)                                                  \
 661         . = ALIGN(bss_align);                                           \
 662         .bss : AT(ADDR(.bss) - LOAD_OFFSET) {                           \
 663                 BSS_FIRST_SECTIONS                                      \
 664                 *(.bss..page_aligned)                                   \
 665                 *(.dynbss)                                              \
 666                 *(BSS_MAIN)                                             \
 667                 *(COMMON)                                               \
 668         }
 669
 670 /*
 671  * DWARF debug sections.
 672  * Symbols in the DWARF debugging sections are relative to
 673  * the beginning of the section so we begin them at 0.
 674  */
 675 #define DWARF_DEBUG                                                     \
 676                 /* DWARF 1 */                                           \
 677                 .debug          0 : { *(.debug) }                       \
 678                 .line           0 : { *(.line) }                        \
 679                 /* GNU DWARF 1 extensions */                            \
 680                 .debug_srcinfo  0 : { *(.debug_srcinfo) }               \
 681                 .debug_sfnames  0 : { *(.debug_sfnames) }               \
 682                 /* DWARF 1.1 and DWARF 2 */                             \
 683                 .debug_aranges  0 : { *(.debug_aranges) }               \
 684                 .debug_pubnames 0 : { *(.debug_pubnames) }              \
 685                 /* DWARF 2 */                                           \
 686                 .debug_info     0 : { *(.debug_info                     \
 687                                 .gnu.linkonce.wi.*) }                   \
 688                 .debug_abbrev   0 : { *(.debug_abbrev) }                \
 689                 .debug_line     0 : { *(.debug_line) }                  \
 690                 .debug_frame    0 : { *(.debug_frame) }                 \
 691                 .debug_str      0 : { *(.debug_str) }                   \
 692                 .debug_loc      0 : { *(.debug_loc) }                   \
 693                 .debug_macinfo  0 : { *(.debug_macinfo) }               \
 694                 .debug_pubtypes 0 : { *(.debug_pubtypes) }              \
 695                 /* DWARF 3 */                                           \
 696                 .debug_ranges   0 : { *(.debug_ranges) }                \
 697                 /* SGI/MIPS DWARF 2 extensions */                       \
 698                 .debug_weaknames 0 : { *(.debug_weaknames) }            \
 699                 .debug_funcnames 0 : { *(.debug_funcnames) }            \
 700                 .debug_typenames 0 : { *(.debug_typenames) }            \
 701                 .debug_varnames  0 : { *(.debug_varnames) }             \
 702                 /* GNU DWARF 2 extensions */                            \
 703                 .debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) }      \
 704                 .debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) }      \
 705                 /* DWARF 4 */                                           \
 706                 .debug_types    0 : { *(.debug_types) }                 \
 707                 /* DWARF 5 */                                           \
 708                 .debug_macro    0 : { *(.debug_macro) }                 \
 709                 .debug_addr     0 : { *(.debug_addr) }
 710
 711                 /* Stabs debugging sections.  */
 712 #define STABS_DEBUG                                                     \
 713                 .stab 0 : { *(.stab) }                                  \
 714                 .stabstr 0 : { *(.stabstr) }                            \
 715                 .stab.excl 0 : { *(.stab.excl) }                        \
 716                 .stab.exclstr 0 : { *(.stab.exclstr) }                  \
 717                 .stab.index 0 : { *(.stab.index) }                      \
 718                 .stab.indexstr 0 : { *(.stab.indexstr) }                \
 719                 .comment 0 : { *(.comment) }
 720
 721 #ifdef CONFIG_GENERIC_BUG
 722 #define BUG_TABLE                                                       \
 723         . = ALIGN(8);                                                   \
 724         __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) {             \
 725                 __start___bug_table = .;                                \
 726                 KEEP(*(__bug_table))                                    \
 727                 __stop___bug_table = .;                                 \
 728         }
 729 #else
 730 #define BUG_TABLE
 731 #endif
 732
 733 #ifdef CONFIG_UNWINDER_ORC
 734 #define ORC_UNWIND_TABLE                                                \
 735         . = ALIGN(4);                                                   \
 736         .orc_unwind_ip : AT(ADDR(.orc_unwind_ip) - LOAD_OFFSET) {       \
 737                 __start_orc_unwind_ip = .;                              \
 738                 KEEP(*(.orc_unwind_ip))                                 \
 739                 __stop_orc_unwind_ip = .;                               \
 740         }                                                               \
 741         . = ALIGN(2);                                                   \
 742         .orc_unwind : AT(ADDR(.orc_unwind) - LOAD_OFFSET) {             \
 743                 __start_orc_unwind = .;                                 \
 744                 KEEP(*(.orc_unwind))                                    \
 745                 __stop_orc_unwind = .;                                  \
 746         }                                                               \
 747         . = ALIGN(4);                                                   \
 748         .orc_lookup : AT(ADDR(.orc_lookup) - LOAD_OFFSET) {             \
 749                 orc_lookup = .;                                         \
 750                 . += (((SIZEOF(.text) + LOOKUP_BLOCK_SIZE - 1) /        \
 751                         LOOKUP_BLOCK_SIZE) + 1) * 4;                    \
 752                 orc_lookup_end = .;                                     \
 753         }
 754 #else
 755 #define ORC_UNWIND_TABLE
 756 #endif
 757
 758 #ifdef CONFIG_PM_TRACE
 759 #define TRACEDATA                                                       \
 760         . = ALIGN(4);                                                   \
 761         .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) {               \
 762                 __tracedata_start = .;                                  \
 763                 KEEP(*(.tracedata))                                     \
 764                 __tracedata_end = .;                                    \
 765         }
 766 #else
 767 #define TRACEDATA
 768 #endif
 769
 770 #define NOTES                                                           \
 771         .notes : AT(ADDR(.notes) - LOAD_OFFSET) {                       \
 772                 __start_notes = .;                                      \
 773                 KEEP(*(.note.*))                                        \
 774                 __stop_notes = .;                                       \
 775         }
 776
 777 #define INIT_SETUP(initsetup_align)                                     \
 778                 . = ALIGN(initsetup_align);                             \
 779                 __setup_start = .;                                      \
 780                 KEEP(*(.init.setup))                                    \
 781                 __setup_end = .;
 782
 783 #define INIT_CALLS_LEVEL(level)                                         \
 784                 __initcall##level##_start = .;                          \
 785                 KEEP(*(.initcall##level##.init))                        \
 786                 KEEP(*(.initcall##level##s.init))                       \
 787
 788 #define INIT_CALLS                                                      \
 789                 __initcall_start = .;                                   \
 790                 KEEP(*(.initcallearly.init))                            \
 791                 INIT_CALLS_LEVEL(0)                                     \
 792                 INIT_CALLS_LEVEL(1)                                     \
 793                 INIT_CALLS_LEVEL(2)                                     \
 794                 INIT_CALLS_LEVEL(3)                                     \
 795                 INIT_CALLS_LEVEL(4)                                     \
 796                 INIT_CALLS_LEVEL(5)                                     \
 797                 INIT_CALLS_LEVEL(rootfs)                                \
 798                 INIT_CALLS_LEVEL(6)                                     \
 799                 INIT_CALLS_LEVEL(7)                                     \
 800                 __initcall_end = .;
 801
 802 #define CON_INITCALL                                                    \
 803                 __con_initcall_start = .;                               \
 804                 KEEP(*(.con_initcall.init))                             \
 805                 __con_initcall_end = .;
 806
 807 #ifdef CONFIG_BLK_DEV_INITRD
 808 #define INIT_RAM_FS                                                     \
 809         . = ALIGN(4);                                                   \
 810         __initramfs_start = .;                                          \
 811         KEEP(*(.init.ramfs))                                            \
 812         . = ALIGN(8);                                                   \
 813         KEEP(*(.init.ramfs.info))
 814 #else
 815 #define INIT_RAM_FS
 816 #endif
 817
 818 /*
 819  * Memory encryption operates on a page basis. Since we need to clear
 820  * the memory encryption mask for this section, it needs to be aligned
 821  * on a page boundary and be a page-size multiple in length.
 822  *
 823  * Note: We use a separate section so that only this section gets
 824  * decrypted to avoid exposing more than we wish.
 825  */
 826 #ifdef CONFIG_AMD_MEM_ENCRYPT
 827 #define PERCPU_DECRYPTED_SECTION                                        \
 828         . = ALIGN(PAGE_SIZE);                                           \
 829         *(.data..percpu..decrypted)                                     \
 830         . = ALIGN(PAGE_SIZE);
 831 #else
 832 #define PERCPU_DECRYPTED_SECTION
 833 #endif
 834
 835
 836 /*
 837  * Default discarded sections.
 838  *
 839  * Some archs want to discard exit text/data at runtime rather than
 840  * link time due to cross-section references such as alt instructions,
 841  * bug table, eh_frame, etc.  DISCARDS must be the last of output
 842  * section definitions so that such archs put those in earlier section
 843  * definitions.
 844  */
 845 #define DISCARDS                                                        \
 846         /DISCARD/ : {                                                   \
 847         EXIT_TEXT                                                       \
 848         EXIT_DATA                                                       \
 849         EXIT_CALL                                                       \
 850         *(.discard)                                                     \
 851         *(.discard.*)                                                   \
 852         *(.modinfo)                                                     \
 853         }
 854
 855 /**
 856  * PERCPU_INPUT - the percpu input sections
 857  * @cacheline: cacheline size
 858  *
 859  * The core percpu section names and core symbols which do not rely
 860  * directly upon load addresses.
 861  *
 862  * @cacheline is used to align subsections to avoid false cacheline
 863  * sharing between subsections for different purposes.
 864  */
 865 #define PERCPU_INPUT(cacheline)                                         \
 866         __per_cpu_start = .;                                            \
 867         *(.data..percpu..first)                                         \
 868         . = ALIGN(PAGE_SIZE);                                           \
 869         *(.data..percpu..page_aligned)                                  \
 870         . = ALIGN(cacheline);                                           \
 871         *(.data..percpu..read_mostly)                                   \
 872         . = ALIGN(cacheline);                                           \
 873         *(.data..percpu)                                                \
 874         *(.data..percpu..shared_aligned)                                \
 875         PERCPU_DECRYPTED_SECTION                                        \
 876         __per_cpu_end = .;
 877
 878 /**
 879  * PERCPU_VADDR - define output section for percpu area
 880  * @cacheline: cacheline size
 881  * @vaddr: explicit base address (optional)
 882  * @phdr: destination PHDR (optional)
 883  *
 884  * Macro which expands to output section for percpu area.
 885  *
 886  * @cacheline is used to align subsections to avoid false cacheline
 887  * sharing between subsections for different purposes.
 888  *
 889  * If @vaddr is not blank, it specifies explicit base address and all
 890  * percpu symbols will be offset from the given address.  If blank,
 891  * @vaddr always equals @laddr + LOAD_OFFSET.
 892  *
 893  * @phdr defines the output PHDR to use if not blank.  Be warned that
 894  * output PHDR is sticky.  If @phdr is specified, the next output
 895  * section in the linker script will go there too.  @phdr should have
 896  * a leading colon.
 897  *
 898  * Note that this macros defines __per_cpu_load as an absolute symbol.
 899  * If there is no need to put the percpu section at a predetermined
 900  * address, use PERCPU_SECTION.
 901  */
 902 #define PERCPU_VADDR(cacheline, vaddr, phdr)                            \
 903         __per_cpu_load = .;                                             \
 904         .data..percpu vaddr : AT(__per_cpu_load - LOAD_OFFSET) {        \
 905                 PERCPU_INPUT(cacheline)                                 \
 906         } phdr                                                          \
 907         . = __per_cpu_load + SIZEOF(.data..percpu);
 908
 909 /**
 910  * PERCPU_SECTION - define output section for percpu area, simple version
 911  * @cacheline: cacheline size
 912  *
 913  * Align to PAGE_SIZE and outputs output section for percpu area.  This
 914  * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and
 915  * __per_cpu_start will be identical.
 916  *
 917  * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,)
 918  * except that __per_cpu_load is defined as a relative symbol against
 919  * .data..percpu which is required for relocatable x86_32 configuration.
 920  */
 921 #define PERCPU_SECTION(cacheline)                                       \
 922         . = ALIGN(PAGE_SIZE);                                           \
 923         .data..percpu   : AT(ADDR(.data..percpu) - LOAD_OFFSET) {       \
 924                 __per_cpu_load = .;                                     \
 925                 PERCPU_INPUT(cacheline)                                 \
 926         }
 927
 928
 929 /*
 930  * Definition of the high level *_SECTION macros
 931  * They will fit only a subset of the architectures
 932  */
 933
 934
 935 /*
 936  * Writeable data.
 937  * All sections are combined in a single .data section.
 938  * The sections following CONSTRUCTORS are arranged so their
 939  * typical alignment matches.
 940  * A cacheline is typical/always less than a PAGE_SIZE so
 941  * the sections that has this restriction (or similar)
 942  * is located before the ones requiring PAGE_SIZE alignment.
 943  * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
 944  * matches the requirement of PAGE_ALIGNED_DATA.
 945  *
 946  * use 0 as page_align if page_aligned data is not used */
 947 #define RW_DATA_SECTION(cacheline, pagealigned, inittask)               \
 948         . = ALIGN(PAGE_SIZE);                                           \
 949         .data : AT(ADDR(.data) - LOAD_OFFSET) {                         \
 950                 INIT_TASK_DATA(inittask)                                \
 951                 NOSAVE_DATA                                             \
 952                 PAGE_ALIGNED_DATA(pagealigned)                          \
 953                 CACHELINE_ALIGNED_DATA(cacheline)                       \
 954                 READ_MOSTLY_DATA(cacheline)                             \
 955                 DATA_DATA                                               \
 956                 CONSTRUCTORS                                            \
 957         }                                                               \
 958         BUG_TABLE                                                       \
 959
 960 #define INIT_TEXT_SECTION(inittext_align)                               \
 961         . = ALIGN(inittext_align);                                      \
 962         .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {               \
 963                 _sinittext = .;                                         \
 964                 INIT_TEXT                                               \
 965                 _einittext = .;                                         \
 966         }
 967
 968 #define INIT_DATA_SECTION(initsetup_align)                              \
 969         .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {               \
 970                 INIT_DATA                                               \
 971                 INIT_SETUP(initsetup_align)                             \
 972                 INIT_CALLS                                              \
 973                 CON_INITCALL                                            \
 974                 INIT_RAM_FS                                             \
 975         }
 976
 977 #define BSS_SECTION(sbss_align, bss_align, stop_align)                  \
 978         . = ALIGN(sbss_align);                                          \
 979         __bss_start = .;                                                \
 980         SBSS(sbss_align)                                                \
 981         BSS(bss_align)                                                  \
 982         . = ALIGN(stop_align);                                          \
 983         __bss_stop = .;