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