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 requirements]
   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 #include <asm-generic/codetag.lds.h>
  54
  55 #ifndef LOAD_OFFSET
  56 #define LOAD_OFFSET 0
  57 #endif
  58
  59 /*
  60  * Only some architectures want to have the .notes segment visible in
  61  * a separate PT_NOTE ELF Program Header. When this happens, it needs
  62  * to be visible in both the kernel text's PT_LOAD and the PT_NOTE
  63  * Program Headers. In this case, though, the PT_LOAD needs to be made
  64  * the default again so that all the following sections don't also end
  65  * up in the PT_NOTE Program Header.
  66  */
  67 #ifdef EMITS_PT_NOTE
  68 #define NOTES_HEADERS           :text :note
  69 #define NOTES_HEADERS_RESTORE   __restore_ph : { *(.__restore_ph) } :text
  70 #else
  71 #define NOTES_HEADERS
  72 #define NOTES_HEADERS_RESTORE
  73 #endif
  74
  75 /*
  76  * Some architectures have non-executable read-only exception tables.
  77  * They can be added to the RO_DATA segment by specifying their desired
  78  * alignment.
  79  */
  80 #ifdef RO_EXCEPTION_TABLE_ALIGN
  81 #define RO_EXCEPTION_TABLE      EXCEPTION_TABLE(RO_EXCEPTION_TABLE_ALIGN)
  82 #else
  83 #define RO_EXCEPTION_TABLE
  84 #endif
  85
  86 /* Align . function alignment. */
  87 #define ALIGN_FUNCTION()  . = ALIGN(CONFIG_FUNCTION_ALIGNMENT)
  88
  89 /*
  90  * LD_DEAD_CODE_DATA_ELIMINATION option enables -fdata-sections, which
  91  * generates .data.identifier sections, which need to be pulled in with
  92  * .data. We don't want to pull in .data..other sections, which Linux
  93  * has defined. Same for text and bss.
  94  *
  95  * With LTO_CLANG, the linker also splits sections by default, so we need
  96  * these macros to combine the sections during the final link.
  97  *
  98  * RODATA_MAIN is not used because existing code already defines .rodata.x
  99  * sections to be brought in with rodata.
 100  */
 101 #if defined(CONFIG_LD_DEAD_CODE_DATA_ELIMINATION) || defined(CONFIG_LTO_CLANG)
 102 #define TEXT_MAIN .text .text.[0-9a-zA-Z_]*
 103 #define DATA_MAIN .data .data.[0-9a-zA-Z_]* .data..L* .data..compoundliteral* .data.$__unnamed_* .data.$L*
 104 #define SDATA_MAIN .sdata .sdata.[0-9a-zA-Z_]*
 105 #define RODATA_MAIN .rodata .rodata.[0-9a-zA-Z_]* .rodata..L*
 106 #define BSS_MAIN .bss .bss.[0-9a-zA-Z_]* .bss..compoundliteral*
 107 #define SBSS_MAIN .sbss .sbss.[0-9a-zA-Z_]*
 108 #else
 109 #define TEXT_MAIN .text
 110 #define DATA_MAIN .data
 111 #define SDATA_MAIN .sdata
 112 #define RODATA_MAIN .rodata
 113 #define BSS_MAIN .bss
 114 #define SBSS_MAIN .sbss
 115 #endif
 116
 117 /*
 118  * GCC 4.5 and later have a 32 bytes section alignment for structures.
 119  * Except GCC 4.9, that feels the need to align on 64 bytes.
 120  */
 121 #define STRUCT_ALIGNMENT 32
 122 #define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT)
 123
 124 /*
 125  * The order of the sched class addresses are important, as they are
 126  * used to determine the order of the priority of each sched class in
 127  * relation to each other.
 128  */
 129 #define SCHED_DATA                              \
 130         STRUCT_ALIGN();                         \
 131         __sched_class_highest = .;              \
 132         *(__stop_sched_class)                   \
 133         *(__dl_sched_class)                     \
 134         *(__rt_sched_class)                     \
 135         *(__fair_sched_class)                   \
 136         *(__idle_sched_class)                   \
 137         __sched_class_lowest = .;
 138
 139 /* The actual configuration determine if the init/exit sections
 140  * are handled as text/data or they can be discarded (which
 141  * often happens at runtime)
 142  */
 143
 144 #if defined(CONFIG_MEMORY_HOTPLUG)
 145 #define MEM_KEEP(sec)    *(.mem##sec)
 146 #define MEM_DISCARD(sec)
 147 #else
 148 #define MEM_KEEP(sec)
 149 #define MEM_DISCARD(sec) *(.mem##sec)
 150 #endif
 151
 152 #ifndef CONFIG_HAVE_DYNAMIC_FTRACE_NO_PATCHABLE
 153 #define KEEP_PATCHABLE          KEEP(*(__patchable_function_entries))
 154 #define PATCHABLE_DISCARDS
 155 #else
 156 #define KEEP_PATCHABLE
 157 #define PATCHABLE_DISCARDS      *(__patchable_function_entries)
 158 #endif
 159
 160 #ifndef CONFIG_ARCH_SUPPORTS_CFI_CLANG
 161 /*
 162  * Simply points to ftrace_stub, but with the proper protocol.
 163  * Defined by the linker script in linux/vmlinux.lds.h
 164  */
 165 #define FTRACE_STUB_HACK        ftrace_stub_graph = ftrace_stub;
 166 #else
 167 #define FTRACE_STUB_HACK
 168 #endif
 169
 170 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
 171 /*
 172  * The ftrace call sites are logged to a section whose name depends on the
 173  * compiler option used. A given kernel image will only use one, AKA
 174  * FTRACE_CALLSITE_SECTION. We capture all of them here to avoid header
 175  * dependencies for FTRACE_CALLSITE_SECTION's definition.
 176  *
 177  * ftrace_ops_list_func will be defined as arch_ftrace_ops_list_func
 178  * as some archs will have a different prototype for that function
 179  * but ftrace_ops_list_func() will have a single prototype.
 180  */
 181 #define MCOUNT_REC()    . = ALIGN(8);                           \
 182                         __start_mcount_loc = .;                 \
 183                         KEEP(*(__mcount_loc))                   \
 184                         KEEP_PATCHABLE                          \
 185                         __stop_mcount_loc = .;                  \
 186                         FTRACE_STUB_HACK                        \
 187                         ftrace_ops_list_func = arch_ftrace_ops_list_func;
 188 #else
 189 # ifdef CONFIG_FUNCTION_TRACER
 190 #  define MCOUNT_REC()  FTRACE_STUB_HACK                        \
 191                         ftrace_ops_list_func = arch_ftrace_ops_list_func;
 192 # else
 193 #  define MCOUNT_REC()
 194 # endif
 195 #endif
 196
 197 #define BOUNDED_SECTION_PRE_LABEL(_sec_, _label_, _BEGIN_, _END_)       \
 198         _BEGIN_##_label_ = .;                                           \
 199         KEEP(*(_sec_))                                                  \
 200         _END_##_label_ = .;
 201
 202 #define BOUNDED_SECTION_POST_LABEL(_sec_, _label_, _BEGIN_, _END_)      \
 203         _label_##_BEGIN_ = .;                                           \
 204         KEEP(*(_sec_))                                                  \
 205         _label_##_END_ = .;
 206
 207 #define BOUNDED_SECTION_BY(_sec_, _label_)                              \
 208         BOUNDED_SECTION_PRE_LABEL(_sec_, _label_, __start, __stop)
 209
 210 #define BOUNDED_SECTION(_sec)    BOUNDED_SECTION_BY(_sec, _sec)
 211
 212 #define HEADERED_SECTION_PRE_LABEL(_sec_, _label_, _BEGIN_, _END_, _HDR_) \
 213         _HDR_##_label_  = .;                                            \
 214         KEEP(*(.gnu.linkonce.##_sec_))                                  \
 215         BOUNDED_SECTION_PRE_LABEL(_sec_, _label_, _BEGIN_, _END_)
 216
 217 #define HEADERED_SECTION_POST_LABEL(_sec_, _label_, _BEGIN_, _END_, _HDR_) \
 218         _label_##_HDR_ = .;                                             \
 219         KEEP(*(.gnu.linkonce.##_sec_))                                  \
 220         BOUNDED_SECTION_POST_LABEL(_sec_, _label_, _BEGIN_, _END_)
 221
 222 #define HEADERED_SECTION_BY(_sec_, _label_)                             \
 223         HEADERED_SECTION_PRE_LABEL(_sec_, _label_, __start, __stop)
 224
 225 #define HEADERED_SECTION(_sec)   HEADERED_SECTION_BY(_sec, _sec)
 226
 227 #ifdef CONFIG_TRACE_BRANCH_PROFILING
 228 #define LIKELY_PROFILE()                                                \
 229         BOUNDED_SECTION_BY(_ftrace_annotated_branch, _annotated_branch_profile)
 230 #else
 231 #define LIKELY_PROFILE()
 232 #endif
 233
 234 #ifdef CONFIG_PROFILE_ALL_BRANCHES
 235 #define BRANCH_PROFILE()                                        \
 236         BOUNDED_SECTION_BY(_ftrace_branch, _branch_profile)
 237 #else
 238 #define BRANCH_PROFILE()
 239 #endif
 240
 241 #ifdef CONFIG_KPROBES
 242 #define KPROBE_BLACKLIST()                              \
 243         . = ALIGN(8);                                   \
 244         BOUNDED_SECTION(_kprobe_blacklist)
 245 #else
 246 #define KPROBE_BLACKLIST()
 247 #endif
 248
 249 #ifdef CONFIG_FUNCTION_ERROR_INJECTION
 250 #define ERROR_INJECT_WHITELIST()                        \
 251         STRUCT_ALIGN();                                 \
 252         BOUNDED_SECTION(_error_injection_whitelist)
 253 #else
 254 #define ERROR_INJECT_WHITELIST()
 255 #endif
 256
 257 #ifdef CONFIG_EVENT_TRACING
 258 #define FTRACE_EVENTS()                                                 \
 259         . = ALIGN(8);                                                   \
 260         BOUNDED_SECTION(_ftrace_events)                                 \
 261         BOUNDED_SECTION_BY(_ftrace_eval_map, _ftrace_eval_maps)
 262 #else
 263 #define FTRACE_EVENTS()
 264 #endif
 265
 266 #ifdef CONFIG_TRACING
 267 #define TRACE_PRINTKS()         BOUNDED_SECTION_BY(__trace_printk_fmt, ___trace_bprintk_fmt)
 268 #define TRACEPOINT_STR()        BOUNDED_SECTION_BY(__tracepoint_str, ___tracepoint_str)
 269 #else
 270 #define TRACE_PRINTKS()
 271 #define TRACEPOINT_STR()
 272 #endif
 273
 274 #ifdef CONFIG_FTRACE_SYSCALLS
 275 #define TRACE_SYSCALLS()                        \
 276         . = ALIGN(8);                           \
 277         BOUNDED_SECTION_BY(__syscalls_metadata, _syscalls_metadata)
 278 #else
 279 #define TRACE_SYSCALLS()
 280 #endif
 281
 282 #ifdef CONFIG_BPF_EVENTS
 283 #define BPF_RAW_TP() STRUCT_ALIGN();                            \
 284         BOUNDED_SECTION_BY(__bpf_raw_tp_map, __bpf_raw_tp)
 285 #else
 286 #define BPF_RAW_TP()
 287 #endif
 288
 289 #ifdef CONFIG_SERIAL_EARLYCON
 290 #define EARLYCON_TABLE()                                                \
 291         . = ALIGN(8);                                                   \
 292         BOUNDED_SECTION_POST_LABEL(__earlycon_table, __earlycon_table, , _end)
 293 #else
 294 #define EARLYCON_TABLE()
 295 #endif
 296
 297 #ifdef CONFIG_SECURITY
 298 #define LSM_TABLE()                                     \
 299         . = ALIGN(8);                                   \
 300         BOUNDED_SECTION_PRE_LABEL(.lsm_info.init, _lsm_info, __start, __end)
 301
 302 #define EARLY_LSM_TABLE()                                               \
 303         . = ALIGN(8);                                                   \
 304         BOUNDED_SECTION_PRE_LABEL(.early_lsm_info.init, _early_lsm_info, __start, __end)
 305 #else
 306 #define LSM_TABLE()
 307 #define EARLY_LSM_TABLE()
 308 #endif
 309
 310 #define ___OF_TABLE(cfg, name)  _OF_TABLE_##cfg(name)
 311 #define __OF_TABLE(cfg, name)   ___OF_TABLE(cfg, name)
 312 #define OF_TABLE(cfg, name)     __OF_TABLE(IS_ENABLED(cfg), name)
 313 #define _OF_TABLE_0(name)
 314 #define _OF_TABLE_1(name)                                               \
 315         . = ALIGN(8);                                                   \
 316         __##name##_of_table = .;                                        \
 317         KEEP(*(__##name##_of_table))                                    \
 318         KEEP(*(__##name##_of_table_end))
 319
 320 #define TIMER_OF_TABLES()       OF_TABLE(CONFIG_TIMER_OF, timer)
 321 #define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip)
 322 #define CLK_OF_TABLES()         OF_TABLE(CONFIG_COMMON_CLK, clk)
 323 #define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem)
 324 #define CPU_METHOD_OF_TABLES()  OF_TABLE(CONFIG_SMP, cpu_method)
 325 #define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method)
 326
 327 #ifdef CONFIG_ACPI
 328 #define ACPI_PROBE_TABLE(name)                                          \
 329         . = ALIGN(8);                                                   \
 330         BOUNDED_SECTION_POST_LABEL(__##name##_acpi_probe_table,         \
 331                                    __##name##_acpi_probe_table,, _end)
 332 #else
 333 #define ACPI_PROBE_TABLE(name)
 334 #endif
 335
 336 #ifdef CONFIG_THERMAL
 337 #define THERMAL_TABLE(name)                                             \
 338         . = ALIGN(8);                                                   \
 339         BOUNDED_SECTION_POST_LABEL(__##name##_thermal_table,            \
 340                                    __##name##_thermal_table,, _end)
 341 #else
 342 #define THERMAL_TABLE(name)
 343 #endif
 344
 345 #define KERNEL_DTB()                                                    \
 346         STRUCT_ALIGN();                                                 \
 347         __dtb_start = .;                                                \
 348         KEEP(*(.dtb.init.rodata))                                       \
 349         __dtb_end = .;
 350
 351 /*
 352  * .data section
 353  */
 354 #define DATA_DATA                                                       \
 355         *(.xiptext)                                                     \
 356         *(DATA_MAIN)                                                    \
 357         *(.data..decrypted)                                             \
 358         *(.ref.data)                                                    \
 359         *(.data..shared_aligned) /* percpu related */                   \
 360         MEM_KEEP(init.data*)                                            \
 361         *(.data.unlikely)                                               \
 362         __start_once = .;                                               \
 363         *(.data.once)                                                   \
 364         __end_once = .;                                                 \
 365         STRUCT_ALIGN();                                                 \
 366         *(__tracepoints)                                                \
 367         /* implement dynamic printk debug */                            \
 368         . = ALIGN(8);                                                   \
 369         BOUNDED_SECTION_BY(__dyndbg_classes, ___dyndbg_classes)         \
 370         BOUNDED_SECTION_BY(__dyndbg, ___dyndbg)                         \
 371         CODETAG_SECTIONS()                                              \
 372         LIKELY_PROFILE()                                                \
 373         BRANCH_PROFILE()                                                \
 374         TRACE_PRINTKS()                                                 \
 375         BPF_RAW_TP()                                                    \
 376         TRACEPOINT_STR()                                                \
 377         KUNIT_TABLE()
 378
 379 /*
 380  * Data section helpers
 381  */
 382 #define NOSAVE_DATA                                                     \
 383         . = ALIGN(PAGE_SIZE);                                           \
 384         __nosave_begin = .;                                             \
 385         *(.data..nosave)                                                \
 386         . = ALIGN(PAGE_SIZE);                                           \
 387         __nosave_end = .;
 388
 389 #define PAGE_ALIGNED_DATA(page_align)                                   \
 390         . = ALIGN(page_align);                                          \
 391         *(.data..page_aligned)                                          \
 392         . = ALIGN(page_align);
 393
 394 #define READ_MOSTLY_DATA(align)                                         \
 395         . = ALIGN(align);                                               \
 396         *(.data..read_mostly)                                           \
 397         . = ALIGN(align);
 398
 399 #define CACHELINE_ALIGNED_DATA(align)                                   \
 400         . = ALIGN(align);                                               \
 401         *(.data..cacheline_aligned)
 402
 403 #define INIT_TASK_DATA(align)                                           \
 404         . = ALIGN(align);                                               \
 405         __start_init_stack = .;                                         \
 406         init_thread_union = .;                                          \
 407         init_stack = .;                                                 \
 408         KEEP(*(.data..init_task))                                       \
 409         KEEP(*(.data..init_thread_info))                                \
 410         . = __start_init_stack + THREAD_SIZE;                           \
 411         __end_init_stack = .;
 412
 413 #define JUMP_TABLE_DATA                                                 \
 414         . = ALIGN(8);                                                   \
 415         BOUNDED_SECTION_BY(__jump_table, ___jump_table)
 416
 417 #ifdef CONFIG_HAVE_STATIC_CALL_INLINE
 418 #define STATIC_CALL_DATA                                                \
 419         . = ALIGN(8);                                                   \
 420         BOUNDED_SECTION_BY(.static_call_sites, _static_call_sites)      \
 421         BOUNDED_SECTION_BY(.static_call_tramp_key, _static_call_tramp_key)
 422 #else
 423 #define STATIC_CALL_DATA
 424 #endif
 425
 426 /*
 427  * Allow architectures to handle ro_after_init data on their
 428  * own by defining an empty RO_AFTER_INIT_DATA.
 429  */
 430 #ifndef RO_AFTER_INIT_DATA
 431 #define RO_AFTER_INIT_DATA                                              \
 432         . = ALIGN(8);                                                   \
 433         __start_ro_after_init = .;                                      \
 434         *(.data..ro_after_init)                                         \
 435         JUMP_TABLE_DATA                                                 \
 436         STATIC_CALL_DATA                                                \
 437         __end_ro_after_init = .;
 438 #endif
 439
 440 /*
 441  * .kcfi_traps contains a list KCFI trap locations.
 442  */
 443 #ifndef KCFI_TRAPS
 444 #ifdef CONFIG_ARCH_USES_CFI_TRAPS
 445 #define KCFI_TRAPS                                                      \
 446         __kcfi_traps : AT(ADDR(__kcfi_traps) - LOAD_OFFSET) {           \
 447                 BOUNDED_SECTION_BY(.kcfi_traps, ___kcfi_traps)          \
 448         }
 449 #else
 450 #define KCFI_TRAPS
 451 #endif
 452 #endif
 453
 454 /*
 455  * Some symbol definitions will not exist yet during the first pass of the
 456  * link, but are guaranteed to exist in the final link. Provide preliminary
 457  * definitions that will be superseded in the final link to avoid having to
 458  * rely on weak external linkage, which requires a GOT when used in position
 459  * independent code.
 460  */
 461 #define PRELIMINARY_SYMBOL_DEFINITIONS                                  \
 462         PROVIDE(kallsyms_addresses = .);                                \
 463         PROVIDE(kallsyms_offsets = .);                                  \
 464         PROVIDE(kallsyms_names = .);                                    \
 465         PROVIDE(kallsyms_num_syms = .);                                 \
 466         PROVIDE(kallsyms_relative_base = .);                            \
 467         PROVIDE(kallsyms_token_table = .);                              \
 468         PROVIDE(kallsyms_token_index = .);                              \
 469         PROVIDE(kallsyms_markers = .);                                  \
 470         PROVIDE(kallsyms_seqs_of_names = .);
 471
 472 /*
 473  * Read only Data
 474  */
 475 #define RO_DATA(align)                                                  \
 476         . = ALIGN((align));                                             \
 477         PRELIMINARY_SYMBOL_DEFINITIONS                                  \
 478         .rodata           : AT(ADDR(.rodata) - LOAD_OFFSET) {           \
 479                 __start_rodata = .;                                     \
 480                 *(.rodata) *(.rodata.*)                                 \
 481                 SCHED_DATA                                              \
 482                 RO_AFTER_INIT_DATA      /* Read only after init */      \
 483                 . = ALIGN(8);                                           \
 484                 BOUNDED_SECTION_BY(__tracepoints_ptrs, ___tracepoints_ptrs) \
 485                 *(__tracepoints_strings)/* Tracepoints: strings */      \
 486         }                                                               \
 487                                                                         \
 488         .rodata1          : AT(ADDR(.rodata1) - LOAD_OFFSET) {          \
 489                 *(.rodata1)                                             \
 490         }                                                               \
 491                                                                         \
 492         /* PCI quirks */                                                \
 493         .pci_fixup        : AT(ADDR(.pci_fixup) - LOAD_OFFSET) {        \
 494                 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_early,  _pci_fixups_early,  __start, __end) \
 495                 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_header, _pci_fixups_header, __start, __end) \
 496                 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_final,  _pci_fixups_final,  __start, __end) \
 497                 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_enable, _pci_fixups_enable, __start, __end) \
 498                 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_resume, _pci_fixups_resume, __start, __end) \
 499                 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_suspend, _pci_fixups_suspend, __start, __end) \
 500                 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_resume_early, _pci_fixups_resume_early, __start, __end) \
 501                 BOUNDED_SECTION_PRE_LABEL(.pci_fixup_suspend_late, _pci_fixups_suspend_late, __start, __end) \
 502         }                                                               \
 503                                                                         \
 504         FW_LOADER_BUILT_IN_DATA                                         \
 505         TRACEDATA                                                       \
 506                                                                         \
 507         PRINTK_INDEX                                                    \
 508                                                                         \
 509         /* Kernel symbol table: Normal symbols */                       \
 510         __ksymtab         : AT(ADDR(__ksymtab) - LOAD_OFFSET) {         \
 511                 __start___ksymtab = .;                                  \
 512                 KEEP(*(SORT(___ksymtab+*)))                             \
 513                 __stop___ksymtab = .;                                   \
 514         }                                                               \
 515                                                                         \
 516         /* Kernel symbol table: GPL-only symbols */                     \
 517         __ksymtab_gpl     : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) {     \
 518                 __start___ksymtab_gpl = .;                              \
 519                 KEEP(*(SORT(___ksymtab_gpl+*)))                         \
 520                 __stop___ksymtab_gpl = .;                               \
 521         }                                                               \
 522                                                                         \
 523         /* Kernel symbol table: Normal symbols */                       \
 524         __kcrctab         : AT(ADDR(__kcrctab) - LOAD_OFFSET) {         \
 525                 __start___kcrctab = .;                                  \
 526                 KEEP(*(SORT(___kcrctab+*)))                             \
 527                 __stop___kcrctab = .;                                   \
 528         }                                                               \
 529                                                                         \
 530         /* Kernel symbol table: GPL-only symbols */                     \
 531         __kcrctab_gpl     : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) {     \
 532                 __start___kcrctab_gpl = .;                              \
 533                 KEEP(*(SORT(___kcrctab_gpl+*)))                         \
 534                 __stop___kcrctab_gpl = .;                               \
 535         }                                                               \
 536                                                                         \
 537         /* Kernel symbol table: strings */                              \
 538         __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
 539                 *(__ksymtab_strings)                                    \
 540         }                                                               \
 541                                                                         \
 542         /* __*init sections */                                          \
 543         __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) {         \
 544                 *(.ref.rodata)                                          \
 545                 MEM_KEEP(init.rodata)                                   \
 546         }                                                               \
 547                                                                         \
 548         /* Built-in module parameters. */                               \
 549         __param : AT(ADDR(__param) - LOAD_OFFSET) {                     \
 550                 BOUNDED_SECTION_BY(__param, ___param)                   \
 551         }                                                               \
 552                                                                         \
 553         /* Built-in module versions. */                                 \
 554         __modver : AT(ADDR(__modver) - LOAD_OFFSET) {                   \
 555                 BOUNDED_SECTION_BY(__modver, ___modver)                 \
 556         }                                                               \
 557                                                                         \
 558         KCFI_TRAPS                                                      \
 559                                                                         \
 560         RO_EXCEPTION_TABLE                                              \
 561         NOTES                                                           \
 562         BTF                                                             \
 563                                                                         \
 564         . = ALIGN((align));                                             \
 565         __end_rodata = .;
 566
 567
 568 /*
 569  * Non-instrumentable text section
 570  */
 571 #define NOINSTR_TEXT                                                    \
 572                 ALIGN_FUNCTION();                                       \
 573                 __noinstr_text_start = .;                               \
 574                 *(.noinstr.text)                                        \
 575                 __cpuidle_text_start = .;                               \
 576                 *(.cpuidle.text)                                        \
 577                 __cpuidle_text_end = .;                                 \
 578                 __noinstr_text_end = .;
 579
 580 /*
 581  * .text section. Map to function alignment to avoid address changes
 582  * during second ld run in second ld pass when generating System.map
 583  *
 584  * TEXT_MAIN here will match .text.fixup and .text.unlikely if dead
 585  * code elimination is enabled, so these sections should be converted
 586  * to use ".." first.
 587  */
 588 #define TEXT_TEXT                                                       \
 589                 ALIGN_FUNCTION();                                       \
 590                 *(.text.hot .text.hot.*)                                \
 591                 *(TEXT_MAIN .text.fixup)                                \
 592                 *(.text.unlikely .text.unlikely.*)                      \
 593                 *(.text.unknown .text.unknown.*)                        \
 594                 NOINSTR_TEXT                                            \
 595                 *(.ref.text)                                            \
 596                 *(.text.asan.* .text.tsan.*)                            \
 597         MEM_KEEP(init.text*)                                            \
 598
 599
 600 /* sched.text is aling to function alignment to secure we have same
 601  * address even at second ld pass when generating System.map */
 602 #define SCHED_TEXT                                                      \
 603                 ALIGN_FUNCTION();                                       \
 604                 __sched_text_start = .;                                 \
 605                 *(.sched.text)                                          \
 606                 __sched_text_end = .;
 607
 608 /* spinlock.text is aling to function alignment to secure we have same
 609  * address even at second ld pass when generating System.map */
 610 #define LOCK_TEXT                                                       \
 611                 ALIGN_FUNCTION();                                       \
 612                 __lock_text_start = .;                                  \
 613                 *(.spinlock.text)                                       \
 614                 __lock_text_end = .;
 615
 616 #define 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                 BOUNDED_SECTION_BY(__ex_table, ___ex_table)             \
 661         }
 662
 663 /*
 664  * .BTF
 665  */
 666 #ifdef CONFIG_DEBUG_INFO_BTF
 667 #define BTF                                                             \
 668         .BTF : AT(ADDR(.BTF) - LOAD_OFFSET) {                           \
 669                 BOUNDED_SECTION_BY(.BTF, _BTF)                          \
 670         }                                                               \
 671         . = ALIGN(4);                                                   \
 672         .BTF_ids : AT(ADDR(.BTF_ids) - LOAD_OFFSET) {                   \
 673                 *(.BTF_ids)                                             \
 674         }
 675 #else
 676 #define BTF
 677 #endif
 678
 679 /*
 680  * Init task
 681  */
 682 #define INIT_TASK_DATA_SECTION(align)                                   \
 683         . = ALIGN(align);                                               \
 684         .data..init_task :  AT(ADDR(.data..init_task) - LOAD_OFFSET) {  \
 685                 INIT_TASK_DATA(align)                                   \
 686         }
 687
 688 #ifdef CONFIG_CONSTRUCTORS
 689 #define KERNEL_CTORS()  . = ALIGN(8);                      \
 690                         __ctors_start = .;                 \
 691                         KEEP(*(SORT(.ctors.*)))            \
 692                         KEEP(*(.ctors))                    \
 693                         KEEP(*(SORT(.init_array.*)))       \
 694                         KEEP(*(.init_array))               \
 695                         __ctors_end = .;
 696 #else
 697 #define KERNEL_CTORS()
 698 #endif
 699
 700 /* init and exit section handling */
 701 #define INIT_DATA                                                       \
 702         KEEP(*(SORT(___kentry+*)))                                      \
 703         *(.init.data .init.data.*)                                      \
 704         MEM_DISCARD(init.data*)                                         \
 705         KERNEL_CTORS()                                                  \
 706         MCOUNT_REC()                                                    \
 707         *(.init.rodata .init.rodata.*)                                  \
 708         FTRACE_EVENTS()                                                 \
 709         TRACE_SYSCALLS()                                                \
 710         KPROBE_BLACKLIST()                                              \
 711         ERROR_INJECT_WHITELIST()                                        \
 712         MEM_DISCARD(init.rodata)                                        \
 713         CLK_OF_TABLES()                                                 \
 714         RESERVEDMEM_OF_TABLES()                                         \
 715         TIMER_OF_TABLES()                                               \
 716         CPU_METHOD_OF_TABLES()                                          \
 717         CPUIDLE_METHOD_OF_TABLES()                                      \
 718         KERNEL_DTB()                                                    \
 719         IRQCHIP_OF_MATCH_TABLE()                                        \
 720         ACPI_PROBE_TABLE(irqchip)                                       \
 721         ACPI_PROBE_TABLE(timer)                                         \
 722         THERMAL_TABLE(governor)                                         \
 723         EARLYCON_TABLE()                                                \
 724         LSM_TABLE()                                                     \
 725         EARLY_LSM_TABLE()                                               \
 726         KUNIT_INIT_TABLE()
 727
 728 #define INIT_TEXT                                                       \
 729         *(.init.text .init.text.*)                                      \
 730         *(.text.startup)                                                \
 731         MEM_DISCARD(init.text*)
 732
 733 #define EXIT_DATA                                                       \
 734         *(.exit.data .exit.data.*)                                      \
 735         *(.fini_array .fini_array.*)                                    \
 736         *(.dtors .dtors.*)                                              \
 737
 738 #define EXIT_TEXT                                                       \
 739         *(.exit.text)                                                   \
 740         *(.text.exit)                                                   \
 741
 742 #define EXIT_CALL                                                       \
 743         *(.exitcall.exit)
 744
 745 /*
 746  * bss (Block Started by Symbol) - uninitialized data
 747  * zeroed during startup
 748  */
 749 #define SBSS(sbss_align)                                                \
 750         . = ALIGN(sbss_align);                                          \
 751         .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) {                         \
 752                 *(.dynsbss)                                             \
 753                 *(SBSS_MAIN)                                            \
 754                 *(.scommon)                                             \
 755         }
 756
 757 /*
 758  * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra
 759  * sections to the front of bss.
 760  */
 761 #ifndef BSS_FIRST_SECTIONS
 762 #define BSS_FIRST_SECTIONS
 763 #endif
 764
 765 #define BSS(bss_align)                                                  \
 766         . = ALIGN(bss_align);                                           \
 767         .bss : AT(ADDR(.bss) - LOAD_OFFSET) {                           \
 768                 BSS_FIRST_SECTIONS                                      \
 769                 . = ALIGN(PAGE_SIZE);                                   \
 770                 *(.bss..page_aligned)                                   \
 771                 . = ALIGN(PAGE_SIZE);                                   \
 772                 *(.dynbss)                                              \
 773                 *(BSS_MAIN)                                             \
 774                 *(COMMON)                                               \
 775         }
 776
 777 /*
 778  * DWARF debug sections.
 779  * Symbols in the DWARF debugging sections are relative to
 780  * the beginning of the section so we begin them at 0.
 781  */
 782 #define DWARF_DEBUG                                                     \
 783                 /* DWARF 1 */                                           \
 784                 .debug          0 : { *(.debug) }                       \
 785                 .line           0 : { *(.line) }                        \
 786                 /* GNU DWARF 1 extensions */                            \
 787                 .debug_srcinfo  0 : { *(.debug_srcinfo) }               \
 788                 .debug_sfnames  0 : { *(.debug_sfnames) }               \
 789                 /* DWARF 1.1 and DWARF 2 */                             \
 790                 .debug_aranges  0 : { *(.debug_aranges) }               \
 791                 .debug_pubnames 0 : { *(.debug_pubnames) }              \
 792                 /* DWARF 2 */                                           \
 793                 .debug_info     0 : { *(.debug_info                     \
 794                                 .gnu.linkonce.wi.*) }                   \
 795                 .debug_abbrev   0 : { *(.debug_abbrev) }                \
 796                 .debug_line     0 : { *(.debug_line) }                  \
 797                 .debug_frame    0 : { *(.debug_frame) }                 \
 798                 .debug_str      0 : { *(.debug_str) }                   \
 799                 .debug_loc      0 : { *(.debug_loc) }                   \
 800                 .debug_macinfo  0 : { *(.debug_macinfo) }               \
 801                 .debug_pubtypes 0 : { *(.debug_pubtypes) }              \
 802                 /* DWARF 3 */                                           \
 803                 .debug_ranges   0 : { *(.debug_ranges) }                \
 804                 /* SGI/MIPS DWARF 2 extensions */                       \
 805                 .debug_weaknames 0 : { *(.debug_weaknames) }            \
 806                 .debug_funcnames 0 : { *(.debug_funcnames) }            \
 807                 .debug_typenames 0 : { *(.debug_typenames) }            \
 808                 .debug_varnames  0 : { *(.debug_varnames) }             \
 809                 /* GNU DWARF 2 extensions */                            \
 810                 .debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) }      \
 811                 .debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) }      \
 812                 /* DWARF 4 */                                           \
 813                 .debug_types    0 : { *(.debug_types) }                 \
 814                 /* DWARF 5 */                                           \
 815                 .debug_addr     0 : { *(.debug_addr) }                  \
 816                 .debug_line_str 0 : { *(.debug_line_str) }              \
 817                 .debug_loclists 0 : { *(.debug_loclists) }              \
 818                 .debug_macro    0 : { *(.debug_macro) }                 \
 819                 .debug_names    0 : { *(.debug_names) }                 \
 820                 .debug_rnglists 0 : { *(.debug_rnglists) }              \
 821                 .debug_str_offsets      0 : { *(.debug_str_offsets) }
 822
 823 /* Stabs debugging sections. */
 824 #define STABS_DEBUG                                                     \
 825                 .stab 0 : { *(.stab) }                                  \
 826                 .stabstr 0 : { *(.stabstr) }                            \
 827                 .stab.excl 0 : { *(.stab.excl) }                        \
 828                 .stab.exclstr 0 : { *(.stab.exclstr) }                  \
 829                 .stab.index 0 : { *(.stab.index) }                      \
 830                 .stab.indexstr 0 : { *(.stab.indexstr) }
 831
 832 /* Required sections not related to debugging. */
 833 #define ELF_DETAILS                                                     \
 834                 .comment 0 : { *(.comment) }                            \
 835                 .symtab 0 : { *(.symtab) }                              \
 836                 .strtab 0 : { *(.strtab) }                              \
 837                 .shstrtab 0 : { *(.shstrtab) }
 838
 839 #ifdef CONFIG_GENERIC_BUG
 840 #define BUG_TABLE                                                       \
 841         . = ALIGN(8);                                                   \
 842         __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) {             \
 843                 BOUNDED_SECTION_BY(__bug_table, ___bug_table)           \
 844         }
 845 #else
 846 #define BUG_TABLE
 847 #endif
 848
 849 #ifdef CONFIG_UNWINDER_ORC
 850 #define ORC_UNWIND_TABLE                                                \
 851         .orc_header : AT(ADDR(.orc_header) - LOAD_OFFSET) {             \
 852                 BOUNDED_SECTION_BY(.orc_header, _orc_header)            \
 853         }                                                               \
 854         . = ALIGN(4);                                                   \
 855         .orc_unwind_ip : AT(ADDR(.orc_unwind_ip) - LOAD_OFFSET) {       \
 856                 BOUNDED_SECTION_BY(.orc_unwind_ip, _orc_unwind_ip)      \
 857         }                                                               \
 858         . = ALIGN(2);                                                   \
 859         .orc_unwind : AT(ADDR(.orc_unwind) - LOAD_OFFSET) {             \
 860                 BOUNDED_SECTION_BY(.orc_unwind, _orc_unwind)            \
 861         }                                                               \
 862         text_size = _etext - _stext;                                    \
 863         . = ALIGN(4);                                                   \
 864         .orc_lookup : AT(ADDR(.orc_lookup) - LOAD_OFFSET) {             \
 865                 orc_lookup = .;                                         \
 866                 . += (((text_size + LOOKUP_BLOCK_SIZE - 1) /            \
 867                         LOOKUP_BLOCK_SIZE) + 1) * 4;                    \
 868                 orc_lookup_end = .;                                     \
 869         }
 870 #else
 871 #define ORC_UNWIND_TABLE
 872 #endif
 873
 874 /* Built-in firmware blobs */
 875 #ifdef CONFIG_FW_LOADER
 876 #define FW_LOADER_BUILT_IN_DATA                                         \
 877         .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) ALIGN(8) {    \
 878                 BOUNDED_SECTION_PRE_LABEL(.builtin_fw, _builtin_fw, __start, __end) \
 879         }
 880 #else
 881 #define FW_LOADER_BUILT_IN_DATA
 882 #endif
 883
 884 #ifdef CONFIG_PM_TRACE
 885 #define TRACEDATA                                                       \
 886         . = ALIGN(4);                                                   \
 887         .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) {               \
 888                 BOUNDED_SECTION_POST_LABEL(.tracedata, __tracedata, _start, _end) \
 889         }
 890 #else
 891 #define TRACEDATA
 892 #endif
 893
 894 #ifdef CONFIG_PRINTK_INDEX
 895 #define PRINTK_INDEX                                                    \
 896         .printk_index : AT(ADDR(.printk_index) - LOAD_OFFSET) {         \
 897                 BOUNDED_SECTION_BY(.printk_index, _printk_index)        \
 898         }
 899 #else
 900 #define PRINTK_INDEX
 901 #endif
 902
 903 /*
 904  * Discard .note.GNU-stack, which is emitted as PROGBITS by the compiler.
 905  * Otherwise, the type of .notes section would become PROGBITS instead of NOTES.
 906  *
 907  * Also, discard .note.gnu.property, otherwise it forces the notes section to
 908  * be 8-byte aligned which causes alignment mismatches with the kernel's custom
 909  * 4-byte aligned notes.
 910  */
 911 #define NOTES                                                           \
 912         /DISCARD/ : {                                                   \
 913                 *(.note.GNU-stack)                                      \
 914                 *(.note.gnu.property)                                   \
 915         }                                                               \
 916         .notes : AT(ADDR(.notes) - LOAD_OFFSET) {                       \
 917                 BOUNDED_SECTION_BY(.note.*, _notes)                     \
 918         } NOTES_HEADERS                                                 \
 919         NOTES_HEADERS_RESTORE
 920
 921 #define INIT_SETUP(initsetup_align)                                     \
 922                 . = ALIGN(initsetup_align);                             \
 923                 BOUNDED_SECTION_POST_LABEL(.init.setup, __setup, _start, _end)
 924
 925 #define INIT_CALLS_LEVEL(level)                                         \
 926                 __initcall##level##_start = .;                          \
 927                 KEEP(*(.initcall##level##.init))                        \
 928                 KEEP(*(.initcall##level##s.init))                       \
 929
 930 #define INIT_CALLS                                                      \
 931                 __initcall_start = .;                                   \
 932                 KEEP(*(.initcallearly.init))                            \
 933                 INIT_CALLS_LEVEL(0)                                     \
 934                 INIT_CALLS_LEVEL(1)                                     \
 935                 INIT_CALLS_LEVEL(2)                                     \
 936                 INIT_CALLS_LEVEL(3)                                     \
 937                 INIT_CALLS_LEVEL(4)                                     \
 938                 INIT_CALLS_LEVEL(5)                                     \
 939                 INIT_CALLS_LEVEL(rootfs)                                \
 940                 INIT_CALLS_LEVEL(6)                                     \
 941                 INIT_CALLS_LEVEL(7)                                     \
 942                 __initcall_end = .;
 943
 944 #define CON_INITCALL                                                    \
 945         BOUNDED_SECTION_POST_LABEL(.con_initcall.init, __con_initcall, _start, _end)
 946
 947 /* Alignment must be consistent with (kunit_suite *) in include/kunit/test.h */
 948 #define KUNIT_TABLE()                                                   \
 949                 . = ALIGN(8);                                           \
 950                 BOUNDED_SECTION_POST_LABEL(.kunit_test_suites, __kunit_suites, _start, _end)
 951
 952 /* Alignment must be consistent with (kunit_suite *) in include/kunit/test.h */
 953 #define KUNIT_INIT_TABLE()                                              \
 954                 . = ALIGN(8);                                           \
 955                 BOUNDED_SECTION_POST_LABEL(.kunit_init_test_suites, \
 956                                 __kunit_init_suites, _start, _end)
 957
 958 #ifdef CONFIG_BLK_DEV_INITRD
 959 #define INIT_RAM_FS                                                     \
 960         . = ALIGN(4);                                                   \
 961         __initramfs_start = .;                                          \
 962         KEEP(*(.init.ramfs))                                            \
 963         . = ALIGN(8);                                                   \
 964         KEEP(*(.init.ramfs.info))
 965 #else
 966 #define INIT_RAM_FS
 967 #endif
 968
 969 /*
 970  * Memory encryption operates on a page basis. Since we need to clear
 971  * the memory encryption mask for this section, it needs to be aligned
 972  * on a page boundary and be a page-size multiple in length.
 973  *
 974  * Note: We use a separate section so that only this section gets
 975  * decrypted to avoid exposing more than we wish.
 976  */
 977 #ifdef CONFIG_AMD_MEM_ENCRYPT
 978 #define PERCPU_DECRYPTED_SECTION                                        \
 979         . = ALIGN(PAGE_SIZE);                                           \
 980         *(.data..percpu..decrypted)                                     \
 981         . = ALIGN(PAGE_SIZE);
 982 #else
 983 #define PERCPU_DECRYPTED_SECTION
 984 #endif
 985
 986
 987 /*
 988  * Default discarded sections.
 989  *
 990  * Some archs want to discard exit text/data at runtime rather than
 991  * link time due to cross-section references such as alt instructions,
 992  * bug table, eh_frame, etc.  DISCARDS must be the last of output
 993  * section definitions so that such archs put those in earlier section
 994  * definitions.
 995  */
 996 #ifdef RUNTIME_DISCARD_EXIT
 997 #define EXIT_DISCARDS
 998 #else
 999 #define EXIT_DISCARDS                                                   \
1000         EXIT_TEXT                                                       \
1001         EXIT_DATA
1002 #endif
1003
1004 /*
1005  * Clang's -fprofile-arcs, -fsanitize=kernel-address, and
1006  * -fsanitize=thread produce unwanted sections (.eh_frame
1007  * and .init_array.*), but CONFIG_CONSTRUCTORS wants to
1008  * keep any .init_array.* sections.
1009  * https://llvm.org/pr46478
1010  */
1011 #ifdef CONFIG_UNWIND_TABLES
1012 #define DISCARD_EH_FRAME
1013 #else
1014 #define DISCARD_EH_FRAME        *(.eh_frame)
1015 #endif
1016 #if defined(CONFIG_GCOV_KERNEL) || defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KCSAN)
1017 # ifdef CONFIG_CONSTRUCTORS
1018 #  define SANITIZER_DISCARDS                                            \
1019         DISCARD_EH_FRAME
1020 # else
1021 #  define SANITIZER_DISCARDS                                            \
1022         *(.init_array) *(.init_array.*)                                 \
1023         DISCARD_EH_FRAME
1024 # endif
1025 #else
1026 # define SANITIZER_DISCARDS
1027 #endif
1028
1029 #define COMMON_DISCARDS                                                 \
1030         SANITIZER_DISCARDS                                              \
1031         PATCHABLE_DISCARDS                                              \
1032         *(.discard)                                                     \
1033         *(.discard.*)                                                   \
1034         *(.export_symbol)                                               \
1035         *(.modinfo)                                                     \
1036         /* ld.bfd warns about .gnu.version* even when not emitted */    \
1037         *(.gnu.version*)                                                \
1038
1039 #define DISCARDS                                                        \
1040         /DISCARD/ : {                                                   \
1041         EXIT_DISCARDS                                                   \
1042         EXIT_CALL                                                       \
1043         COMMON_DISCARDS                                                 \
1044         }
1045
1046 /**
1047  * PERCPU_INPUT - the percpu input sections
1048  * @cacheline: cacheline size
1049  *
1050  * The core percpu section names and core symbols which do not rely
1051  * directly upon load addresses.
1052  *
1053  * @cacheline is used to align subsections to avoid false cacheline
1054  * sharing between subsections for different purposes.
1055  */
1056 #define PERCPU_INPUT(cacheline)                                         \
1057         __per_cpu_start = .;                                            \
1058         *(.data..percpu..first)                                         \
1059         . = ALIGN(PAGE_SIZE);                                           \
1060         *(.data..percpu..page_aligned)                                  \
1061         . = ALIGN(cacheline);                                           \
1062         *(.data..percpu..read_mostly)                                   \
1063         . = ALIGN(cacheline);                                           \
1064         *(.data..percpu)                                                \
1065         *(.data..percpu..shared_aligned)                                \
1066         PERCPU_DECRYPTED_SECTION                                        \
1067         __per_cpu_end = .;
1068
1069 /**
1070  * PERCPU_VADDR - define output section for percpu area
1071  * @cacheline: cacheline size
1072  * @vaddr: explicit base address (optional)
1073  * @phdr: destination PHDR (optional)
1074  *
1075  * Macro which expands to output section for percpu area.
1076  *
1077  * @cacheline is used to align subsections to avoid false cacheline
1078  * sharing between subsections for different purposes.
1079  *
1080  * If @vaddr is not blank, it specifies explicit base address and all
1081  * percpu symbols will be offset from the given address.  If blank,
1082  * @vaddr always equals @laddr + LOAD_OFFSET.
1083  *
1084  * @phdr defines the output PHDR to use if not blank.  Be warned that
1085  * output PHDR is sticky.  If @phdr is specified, the next output
1086  * section in the linker script will go there too.  @phdr should have
1087  * a leading colon.
1088  *
1089  * Note that this macros defines __per_cpu_load as an absolute symbol.
1090  * If there is no need to put the percpu section at a predetermined
1091  * address, use PERCPU_SECTION.
1092  */
1093 #define PERCPU_VADDR(cacheline, vaddr, phdr)                            \
1094         __per_cpu_load = .;                                             \
1095         .data..percpu vaddr : AT(__per_cpu_load - LOAD_OFFSET) {        \
1096                 PERCPU_INPUT(cacheline)                                 \
1097         } phdr                                                          \
1098         . = __per_cpu_load + SIZEOF(.data..percpu);
1099
1100 /**
1101  * PERCPU_SECTION - define output section for percpu area, simple version
1102  * @cacheline: cacheline size
1103  *
1104  * Align to PAGE_SIZE and outputs output section for percpu area.  This
1105  * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and
1106  * __per_cpu_start will be identical.
1107  *
1108  * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,)
1109  * except that __per_cpu_load is defined as a relative symbol against
1110  * .data..percpu which is required for relocatable x86_32 configuration.
1111  */
1112 #define PERCPU_SECTION(cacheline)                                       \
1113         . = ALIGN(PAGE_SIZE);                                           \
1114         .data..percpu   : AT(ADDR(.data..percpu) - LOAD_OFFSET) {       \
1115                 __per_cpu_load = .;                                     \
1116                 PERCPU_INPUT(cacheline)                                 \
1117         }
1118
1119
1120 /*
1121  * Definition of the high level *_SECTION macros
1122  * They will fit only a subset of the architectures
1123  */
1124
1125
1126 /*
1127  * Writeable data.
1128  * All sections are combined in a single .data section.
1129  * The sections following CONSTRUCTORS are arranged so their
1130  * typical alignment matches.
1131  * A cacheline is typical/always less than a PAGE_SIZE so
1132  * the sections that has this restriction (or similar)
1133  * is located before the ones requiring PAGE_SIZE alignment.
1134  * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
1135  * matches the requirement of PAGE_ALIGNED_DATA.
1136  *
1137  * use 0 as page_align if page_aligned data is not used */
1138 #define RW_DATA(cacheline, pagealigned, inittask)                       \
1139         . = ALIGN(PAGE_SIZE);                                           \
1140         .data : AT(ADDR(.data) - LOAD_OFFSET) {                         \
1141                 INIT_TASK_DATA(inittask)                                \
1142                 NOSAVE_DATA                                             \
1143                 PAGE_ALIGNED_DATA(pagealigned)                          \
1144                 CACHELINE_ALIGNED_DATA(cacheline)                       \
1145                 READ_MOSTLY_DATA(cacheline)                             \
1146                 DATA_DATA                                               \
1147                 CONSTRUCTORS                                            \
1148         }                                                               \
1149         BUG_TABLE                                                       \
1150
1151 #define INIT_TEXT_SECTION(inittext_align)                               \
1152         . = ALIGN(inittext_align);                                      \
1153         .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {               \
1154                 _sinittext = .;                                         \
1155                 INIT_TEXT                                               \
1156                 _einittext = .;                                         \
1157         }
1158
1159 #define INIT_DATA_SECTION(initsetup_align)                              \
1160         .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {               \
1161                 INIT_DATA                                               \
1162                 INIT_SETUP(initsetup_align)                             \
1163                 INIT_CALLS                                              \
1164                 CON_INITCALL                                            \
1165                 INIT_RAM_FS                                             \
1166         }
1167
1168 #define BSS_SECTION(sbss_align, bss_align, stop_align)                  \
1169         . = ALIGN(sbss_align);                                          \
1170         __bss_start = .;                                                \
1171         SBSS(sbss_align)                                                \
1172         BSS(bss_align)                                                  \
1173         . = ALIGN(stop_align);                                          \
1174         __bss_stop = .;