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