| | 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 | * [_stext, _etext] is the text section |
| | 44 | * [_sdata, _edata] is the data section |
| | 45 | * |
| | 46 | * Some of the included output section have their own set of constants. |
| | 47 | * Examples are: [__initramfs_start, __initramfs_end] for initramfs and |
| | 48 | * [__nosave_begin, __nosave_end] for the nosave data |
| | 49 | */ |
| | 50 | |
| | 51 | #ifndef LOAD_OFFSET |
| | 52 | #define LOAD_OFFSET 0 |
| | 53 | #endif |
| | 54 | |
| | 55 | #ifndef SYMBOL_PREFIX |
| | 56 | #define VMLINUX_SYMBOL(sym) sym |
| | 57 | #else |
| | 58 | #define PASTE2(x,y) x##y |
| | 59 | #define PASTE(x,y) PASTE2(x,y) |
| | 60 | #define VMLINUX_SYMBOL(sym) PASTE(SYMBOL_PREFIX, sym) |
| | 61 | #endif |
| | 62 | |
| | 63 | /* Align . to a 8 byte boundary equals to maximum function alignment. */ |
| | 64 | #define ALIGN_FUNCTION() . = ALIGN(8) |
| | 65 | |
| | 66 | /* |
| | 67 | * Align to a 32 byte boundary equal to the |
| | 68 | * alignment gcc 4.5 uses for a struct |
| | 69 | */ |
| | 70 | #define STRUCT_ALIGNMENT 32 |
| | 71 | #define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT) |
| | 72 | |
| | 73 | /* The actual configuration determine if the init/exit sections |
| | 74 | * are handled as text/data or they can be discarded (which |
| | 75 | * often happens at runtime) |
| | 76 | */ |
| | 77 | #ifdef CONFIG_HOTPLUG |
| | 78 | #define DEV_KEEP(sec) *(.dev##sec) |
| | 79 | #define DEV_DISCARD(sec) |
| | 80 | #else |
| | 81 | #define DEV_KEEP(sec) |
| | 82 | #define DEV_DISCARD(sec) *(.dev##sec) |
| | 83 | #endif |
| | 84 | |
| | 85 | #ifdef CONFIG_HOTPLUG_CPU |
| | 86 | #define CPU_KEEP(sec) *(.cpu##sec) |
| | 87 | #define CPU_DISCARD(sec) |
| | 88 | #else |
| | 89 | #define CPU_KEEP(sec) |
| | 90 | #define CPU_DISCARD(sec) *(.cpu##sec) |
| | 91 | #endif |
| | 92 | |
| | 93 | #if defined(CONFIG_MEMORY_HOTPLUG) |
| | 94 | #define MEM_KEEP(sec) *(.mem##sec) |
| | 95 | #define MEM_DISCARD(sec) |
| | 96 | #else |
| | 97 | #define MEM_KEEP(sec) |
| | 98 | #define MEM_DISCARD(sec) *(.mem##sec) |
| | 99 | #endif |
| | 100 | |
| | 101 | #ifdef CONFIG_FTRACE_MCOUNT_RECORD |
| | 102 | #define MCOUNT_REC() . = ALIGN(8); \ |
| | 103 | VMLINUX_SYMBOL(__start_mcount_loc) = .; \ |
| | 104 | *(__mcount_loc) \ |
| | 105 | VMLINUX_SYMBOL(__stop_mcount_loc) = .; |
| | 106 | #else |
| | 107 | #define MCOUNT_REC() |
| | 108 | #endif |
| | 109 | |
| | 110 | #ifdef CONFIG_TRACE_BRANCH_PROFILING |
| | 111 | #define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \ |
| | 112 | *(_ftrace_annotated_branch) \ |
| | 113 | VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .; |
| | 114 | #else |
| | 115 | #define LIKELY_PROFILE() |
| | 116 | #endif |
| | 117 | |
| | 118 | #ifdef CONFIG_PROFILE_ALL_BRANCHES |
| | 119 | #define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \ |
| | 120 | *(_ftrace_branch) \ |
| | 121 | VMLINUX_SYMBOL(__stop_branch_profile) = .; |
| | 122 | #else |
| | 123 | #define BRANCH_PROFILE() |
| | 124 | #endif |
| | 125 | |
| | 126 | #ifdef CONFIG_EVENT_TRACING |
| | 127 | #define FTRACE_EVENTS() . = ALIGN(8); \ |
| | 128 | VMLINUX_SYMBOL(__start_ftrace_events) = .; \ |
| | 129 | *(_ftrace_events) \ |
| | 130 | VMLINUX_SYMBOL(__stop_ftrace_events) = .; |
| | 131 | #else |
| | 132 | #define FTRACE_EVENTS() |
| | 133 | #endif |
| | 134 | |
| | 135 | #ifdef CONFIG_TRACING |
| | 136 | #define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \ |
| | 137 | *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \ |
| | 138 | VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .; |
| | 139 | #else |
| | 140 | #define TRACE_PRINTKS() |
| | 141 | #endif |
| | 142 | |
| | 143 | #ifdef CONFIG_FTRACE_SYSCALLS |
| | 144 | #define TRACE_SYSCALLS() . = ALIGN(8); \ |
| | 145 | VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \ |
| | 146 | *(__syscalls_metadata) \ |
| | 147 | VMLINUX_SYMBOL(__stop_syscalls_metadata) = .; |
| | 148 | #else |
| | 149 | #define TRACE_SYSCALLS() |
| | 150 | #endif |
| | 151 | |
| | 152 | #ifdef CONFIG_CLKSRC_OF |
| | 153 | #define CLKSRC_OF_TABLES() . = ALIGN(8); \ |
| | 154 | VMLINUX_SYMBOL(__clksrc_of_table) = .; \ |
| | 155 | *(__clksrc_of_table) \ |
| | 156 | *(__clksrc_of_table_end) |
| | 157 | #else |
| | 158 | #define CLKSRC_OF_TABLES() |
| | 159 | #endif |
| | 160 | |
| | 161 | #define KERNEL_DTB() \ |
| | 162 | STRUCT_ALIGN(); \ |
| | 163 | VMLINUX_SYMBOL(__dtb_start) = .; \ |
| | 164 | *(.dtb.init.rodata) \ |
| | 165 | VMLINUX_SYMBOL(__dtb_end) = .; |
| | 166 | |
| | 167 | /* .data section */ |
| | 168 | #define DATA_DATA \ |
| | 169 | *(.data) \ |
| | 170 | *(.ref.data) \ |
| | 171 | *(.data..shared_aligned) /* percpu related */ \ |
| | 172 | DEV_KEEP(init.data) \ |
| | 173 | DEV_KEEP(exit.data) \ |
| | 174 | CPU_KEEP(init.data) \ |
| | 175 | CPU_KEEP(exit.data) \ |
| | 176 | MEM_KEEP(init.data) \ |
| | 177 | MEM_KEEP(exit.data) \ |
| | 178 | *(.data.unlikely) \ |
| | 179 | STRUCT_ALIGN(); \ |
| | 180 | *(__tracepoints) \ |
| | 181 | /* implement dynamic printk debug */ \ |
| | 182 | . = ALIGN(8); \ |
| | 183 | VMLINUX_SYMBOL(__start___jump_table) = .; \ |
| | 184 | *(__jump_table) \ |
| | 185 | VMLINUX_SYMBOL(__stop___jump_table) = .; \ |
| | 186 | . = ALIGN(8); \ |
| | 187 | VMLINUX_SYMBOL(__start___verbose) = .; \ |
| | 188 | *(__verbose) \ |
| | 189 | VMLINUX_SYMBOL(__stop___verbose) = .; \ |
| | 190 | LIKELY_PROFILE() \ |
| | 191 | BRANCH_PROFILE() \ |
| | 192 | TRACE_PRINTKS() |
| | 193 | |
| | 194 | /* |
| | 195 | * Data section helpers |
| | 196 | */ |
| | 197 | #define NOSAVE_DATA \ |
| | 198 | . = ALIGN(PAGE_SIZE); \ |
| | 199 | VMLINUX_SYMBOL(__nosave_begin) = .; \ |
| | 200 | *(.data..nosave) \ |
| | 201 | . = ALIGN(PAGE_SIZE); \ |
| | 202 | VMLINUX_SYMBOL(__nosave_end) = .; |
| | 203 | |
| | 204 | #define PAGE_ALIGNED_DATA(page_align) \ |
| | 205 | . = ALIGN(page_align); \ |
| | 206 | *(.data..page_aligned) |
| | 207 | |
| | 208 | #define READ_MOSTLY_DATA(align) \ |
| | 209 | . = ALIGN(align); \ |
| | 210 | *(.data..read_mostly) \ |
| | 211 | . = ALIGN(align); |
| | 212 | |
| | 213 | #define CACHELINE_ALIGNED_DATA(align) \ |
| | 214 | . = ALIGN(align); \ |
| | 215 | *(.data..cacheline_aligned) |
| | 216 | |
| | 217 | #define INIT_TASK_DATA(align) \ |
| | 218 | . = ALIGN(align); \ |
| | 219 | *(.data..init_task) |
| | 220 | |
| | 221 | /* |
| | 222 | * Read only Data |
| | 223 | */ |
| | 224 | #define RO_DATA_SECTION(align) \ |
| | 225 | . = ALIGN((align)); \ |
| | 226 | .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \ |
| | 227 | VMLINUX_SYMBOL(__start_rodata) = .; \ |
| | 228 | *(.rodata) *(.rodata.*) \ |
| | 229 | *(__vermagic) /* Kernel version magic */ \ |
| | 230 | . = ALIGN(8); \ |
| | 231 | VMLINUX_SYMBOL(__start___tracepoints_ptrs) = .; \ |
| | 232 | *(__tracepoints_ptrs) /* Tracepoints: pointer array */\ |
| | 233 | VMLINUX_SYMBOL(__stop___tracepoints_ptrs) = .; \ |
| | 234 | *(__tracepoints_strings)/* Tracepoints: strings */ \ |
| | 235 | } \ |
| | 236 | \ |
| | 237 | .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \ |
| | 238 | *(.rodata1) \ |
| | 239 | } \ |
| | 240 | \ |
| | 241 | BUG_TABLE \ |
| | 242 | \ |
| | 243 | /* PCI quirks */ \ |
| | 244 | .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \ |
| | 245 | VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \ |
| | 246 | *(.pci_fixup_early) \ |
| | 247 | VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \ |
| | 248 | VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \ |
| | 249 | *(.pci_fixup_header) \ |
| | 250 | VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \ |
| | 251 | VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \ |
| | 252 | *(.pci_fixup_final) \ |
| | 253 | VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \ |
| | 254 | VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \ |
| | 255 | *(.pci_fixup_enable) \ |
| | 256 | VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \ |
| | 257 | VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \ |
| | 258 | *(.pci_fixup_resume) \ |
| | 259 | VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \ |
| | 260 | VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \ |
| | 261 | *(.pci_fixup_resume_early) \ |
| | 262 | VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \ |
| | 263 | VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \ |
| | 264 | *(.pci_fixup_suspend) \ |
| | 265 | VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \ |
| | 266 | } \ |
| | 267 | \ |
| | 268 | /* Built-in firmware blobs */ \ |
| | 269 | .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \ |
| | 270 | VMLINUX_SYMBOL(__start_builtin_fw) = .; \ |
| | 271 | *(.builtin_fw) \ |
| | 272 | VMLINUX_SYMBOL(__end_builtin_fw) = .; \ |
| | 273 | } \ |
| | 274 | \ |
| | 275 | /* RapidIO route ops */ \ |
| | 276 | .rio_ops : AT(ADDR(.rio_ops) - LOAD_OFFSET) { \ |
| | 277 | VMLINUX_SYMBOL(__start_rio_switch_ops) = .; \ |
| | 278 | *(.rio_switch_ops) \ |
| | 279 | VMLINUX_SYMBOL(__end_rio_switch_ops) = .; \ |
| | 280 | } \ |
| | 281 | \ |
| | 282 | TRACEDATA \ |
| | 283 | \ |
| | 284 | /* Kernel symbol table: Normal symbols */ \ |
| | 285 | __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \ |
| | 286 | VMLINUX_SYMBOL(__start___ksymtab) = .; \ |
| | 287 | *(SORT(___ksymtab+*)) \ |
| | 288 | VMLINUX_SYMBOL(__stop___ksymtab) = .; \ |
| | 289 | } \ |
| | 290 | \ |
| | 291 | /* Kernel symbol table: GPL-only symbols */ \ |
| | 292 | __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \ |
| | 293 | VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \ |
| | 294 | *(SORT(___ksymtab_gpl+*)) \ |
| | 295 | VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \ |
| | 296 | } \ |
| | 297 | \ |
| | 298 | /* Kernel symbol table: Normal unused symbols */ \ |
| | 299 | __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \ |
| | 300 | VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \ |
| | 301 | *(SORT(___ksymtab_unused+*)) \ |
| | 302 | VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \ |
| | 303 | } \ |
| | 304 | \ |
| | 305 | /* Kernel symbol table: GPL-only unused symbols */ \ |
| | 306 | __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \ |
| | 307 | VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \ |
| | 308 | *(SORT(___ksymtab_unused_gpl+*)) \ |
| | 309 | VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \ |
| | 310 | } \ |
| | 311 | \ |
| | 312 | /* Kernel symbol table: GPL-future-only symbols */ \ |
| | 313 | __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \ |
| | 314 | VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \ |
| | 315 | *(SORT(___ksymtab_gpl_future+*)) \ |
| | 316 | VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \ |
| | 317 | } \ |
| | 318 | \ |
| | 319 | /* Kernel symbol table: Normal symbols */ \ |
| | 320 | __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \ |
| | 321 | VMLINUX_SYMBOL(__start___kcrctab) = .; \ |
| | 322 | *(SORT(___kcrctab+*)) \ |
| | 323 | VMLINUX_SYMBOL(__stop___kcrctab) = .; \ |
| | 324 | } \ |
| | 325 | \ |
| | 326 | /* Kernel symbol table: GPL-only symbols */ \ |
| | 327 | __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \ |
| | 328 | VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \ |
| | 329 | *(SORT(___kcrctab_gpl+*)) \ |
| | 330 | VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \ |
| | 331 | } \ |
| | 332 | \ |
| | 333 | /* Kernel symbol table: Normal unused symbols */ \ |
| | 334 | __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \ |
| | 335 | VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \ |
| | 336 | *(SORT(___kcrctab_unused+*)) \ |
| | 337 | VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \ |
| | 338 | } \ |
| | 339 | \ |
| | 340 | /* Kernel symbol table: GPL-only unused symbols */ \ |
| | 341 | __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \ |
| | 342 | VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \ |
| | 343 | *(SORT(___kcrctab_unused_gpl+*)) \ |
| | 344 | VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \ |
| | 345 | } \ |
| | 346 | \ |
| | 347 | /* Kernel symbol table: GPL-future-only symbols */ \ |
| | 348 | __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \ |
| | 349 | VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \ |
| | 350 | *(SORT(___kcrctab_gpl_future+*)) \ |
| | 351 | VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \ |
| | 352 | } \ |
| | 353 | \ |
| | 354 | /* Kernel symbol table: strings */ \ |
| | 355 | __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \ |
| | 356 | *(__ksymtab_strings) \ |
| | 357 | } \ |
| | 358 | \ |
| | 359 | /* __*init sections */ \ |
| | 360 | __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \ |
| | 361 | *(.ref.rodata) \ |
| | 362 | DEV_KEEP(init.rodata) \ |
| | 363 | DEV_KEEP(exit.rodata) \ |
| | 364 | CPU_KEEP(init.rodata) \ |
| | 365 | CPU_KEEP(exit.rodata) \ |
| | 366 | MEM_KEEP(init.rodata) \ |
| | 367 | MEM_KEEP(exit.rodata) \ |
| | 368 | } \ |
| | 369 | \ |
| | 370 | /* Built-in module parameters. */ \ |
| | 371 | __param : AT(ADDR(__param) - LOAD_OFFSET) { \ |
| | 372 | VMLINUX_SYMBOL(__start___param) = .; \ |
| | 373 | *(__param) \ |
| | 374 | VMLINUX_SYMBOL(__stop___param) = .; \ |
| | 375 | } \ |
| | 376 | \ |
| | 377 | /* Built-in module versions. */ \ |
| | 378 | __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \ |
| | 379 | VMLINUX_SYMBOL(__start___modver) = .; \ |
| | 380 | *(__modver) \ |
| | 381 | VMLINUX_SYMBOL(__stop___modver) = .; \ |
| | 382 | . = ALIGN((align)); \ |
| | 383 | VMLINUX_SYMBOL(__end_rodata) = .; \ |
| | 384 | } \ |
| | 385 | . = ALIGN((align)); |
| | 386 | |
| | 387 | /* RODATA & RO_DATA provided for backward compatibility. |
| | 388 | * All archs are supposed to use RO_DATA() */ |
| | 389 | #define RODATA RO_DATA_SECTION(4096) |
| | 390 | #define RO_DATA(align) RO_DATA_SECTION(align) |
| | 391 | |
| | 392 | #define SECURITY_INIT \ |
| | 393 | .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \ |
| | 394 | VMLINUX_SYMBOL(__security_initcall_start) = .; \ |
| | 395 | *(.security_initcall.init) \ |
| | 396 | VMLINUX_SYMBOL(__security_initcall_end) = .; \ |
| | 397 | } |
| | 398 | |
| | 399 | /* .text section. Map to function alignment to avoid address changes |
| | 400 | * during second ld run in second ld pass when generating System.map */ |
| | 401 | #define TEXT_TEXT \ |
| | 402 | ALIGN_FUNCTION(); \ |
| | 403 | *(.text.hot) \ |
| | 404 | *(.text) \ |
| | 405 | *(.ref.text) \ |
| | 406 | DEV_KEEP(init.text) \ |
| | 407 | DEV_KEEP(exit.text) \ |
| | 408 | CPU_KEEP(init.text) \ |
| | 409 | CPU_KEEP(exit.text) \ |
| | 410 | MEM_KEEP(init.text) \ |
| | 411 | MEM_KEEP(exit.text) \ |
| | 412 | *(.text.unlikely) |
| | 413 | |
| | 414 | |
| | 415 | /* sched.text is aling to function alignment to secure we have same |
| | 416 | * address even at second ld pass when generating System.map */ |
| | 417 | #define SCHED_TEXT \ |
| | 418 | ALIGN_FUNCTION(); \ |
| | 419 | VMLINUX_SYMBOL(__sched_text_start) = .; \ |
| | 420 | *(.sched.text) \ |
| | 421 | VMLINUX_SYMBOL(__sched_text_end) = .; |
| | 422 | |
| | 423 | /* spinlock.text is aling to function alignment to secure we have same |
| | 424 | * address even at second ld pass when generating System.map */ |
| | 425 | #define LOCK_TEXT \ |
| | 426 | ALIGN_FUNCTION(); \ |
| | 427 | VMLINUX_SYMBOL(__lock_text_start) = .; \ |
| | 428 | *(.spinlock.text) \ |
| | 429 | VMLINUX_SYMBOL(__lock_text_end) = .; |
| | 430 | |
| | 431 | #define KPROBES_TEXT \ |
| | 432 | ALIGN_FUNCTION(); \ |
| | 433 | VMLINUX_SYMBOL(__kprobes_text_start) = .; \ |
| | 434 | *(.kprobes.text) \ |
| | 435 | VMLINUX_SYMBOL(__kprobes_text_end) = .; |
| | 436 | |
| | 437 | #define ENTRY_TEXT \ |
| | 438 | ALIGN_FUNCTION(); \ |
| | 439 | VMLINUX_SYMBOL(__entry_text_start) = .; \ |
| | 440 | *(.entry.text) \ |
| | 441 | VMLINUX_SYMBOL(__entry_text_end) = .; |
| | 442 | |
| | 443 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
| | 444 | #define IRQENTRY_TEXT \ |
| | 445 | ALIGN_FUNCTION(); \ |
| | 446 | VMLINUX_SYMBOL(__irqentry_text_start) = .; \ |
| | 447 | *(.irqentry.text) \ |
| | 448 | VMLINUX_SYMBOL(__irqentry_text_end) = .; |
| | 449 | #else |
| | 450 | #define IRQENTRY_TEXT |
| | 451 | #endif |
| | 452 | |
| | 453 | /* Section used for early init (in .S files) */ |
| | 454 | #define HEAD_TEXT *(.head.text) |
| | 455 | |
| | 456 | #define HEAD_TEXT_SECTION \ |
| | 457 | .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \ |
| | 458 | HEAD_TEXT \ |
| | 459 | } |
| | 460 | |
| | 461 | /* |
| | 462 | * Exception table |
| | 463 | */ |
| | 464 | #define EXCEPTION_TABLE(align) \ |
| | 465 | . = ALIGN(align); \ |
| | 466 | __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \ |
| | 467 | VMLINUX_SYMBOL(__start___ex_table) = .; \ |
| | 468 | *(__ex_table) \ |
| | 469 | VMLINUX_SYMBOL(__stop___ex_table) = .; \ |
| | 470 | } |
| | 471 | |
| | 472 | /* |
| | 473 | * Init task |
| | 474 | */ |
| | 475 | #define INIT_TASK_DATA_SECTION(align) \ |
| | 476 | . = ALIGN(align); \ |
| | 477 | .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \ |
| | 478 | INIT_TASK_DATA(align) \ |
| | 479 | } |
| | 480 | |
| | 481 | #ifdef CONFIG_CONSTRUCTORS |
| | 482 | #define KERNEL_CTORS() . = ALIGN(8); \ |
| | 483 | VMLINUX_SYMBOL(__ctors_start) = .; \ |
| | 484 | *(.ctors) \ |
| | 485 | VMLINUX_SYMBOL(__ctors_end) = .; |
| | 486 | #else |
| | 487 | #define KERNEL_CTORS() |
| | 488 | #endif |
| | 489 | |
| | 490 | /* init and exit section handling */ |
| | 491 | #define INIT_DATA \ |
| | 492 | *(.init.data) \ |
| | 493 | DEV_DISCARD(init.data) \ |
| | 494 | CPU_DISCARD(init.data) \ |
| | 495 | MEM_DISCARD(init.data) \ |
| | 496 | KERNEL_CTORS() \ |
| | 497 | MCOUNT_REC() \ |
| | 498 | *(.init.rodata) \ |
| | 499 | FTRACE_EVENTS() \ |
| | 500 | TRACE_SYSCALLS() \ |
| | 501 | DEV_DISCARD(init.rodata) \ |
| | 502 | CPU_DISCARD(init.rodata) \ |
| | 503 | MEM_DISCARD(init.rodata) \ |
| | 504 | CLKSRC_OF_TABLES() \ |
| | 505 | KERNEL_DTB() |
| | 506 | |
| | 507 | #define INIT_TEXT \ |
| | 508 | *(.init.text) \ |
| | 509 | DEV_DISCARD(init.text) \ |
| | 510 | CPU_DISCARD(init.text) \ |
| | 511 | MEM_DISCARD(init.text) |
| | 512 | |
| | 513 | #define EXIT_DATA \ |
| | 514 | *(.exit.data) \ |
| | 515 | DEV_DISCARD(exit.data) \ |
| | 516 | DEV_DISCARD(exit.rodata) \ |
| | 517 | CPU_DISCARD(exit.data) \ |
| | 518 | CPU_DISCARD(exit.rodata) \ |
| | 519 | MEM_DISCARD(exit.data) \ |
| | 520 | MEM_DISCARD(exit.rodata) |
| | 521 | |
| | 522 | #define EXIT_TEXT \ |
| | 523 | *(.exit.text) \ |
| | 524 | DEV_DISCARD(exit.text) \ |
| | 525 | CPU_DISCARD(exit.text) \ |
| | 526 | MEM_DISCARD(exit.text) |
| | 527 | |
| | 528 | #define EXIT_CALL \ |
| | 529 | *(.exitcall.exit) |
| | 530 | |
| | 531 | /* |
| | 532 | * bss (Block Started by Symbol) - uninitialized data |
| | 533 | * zeroed during startup |
| | 534 | */ |
| | 535 | #define SBSS(sbss_align) \ |
| | 536 | . = ALIGN(sbss_align); \ |
| | 537 | .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \ |
| | 538 | *(.sbss) \ |
| | 539 | *(.scommon) \ |
| | 540 | } |
| | 541 | |
| | 542 | /* |
| | 543 | * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra |
| | 544 | * sections to the front of bss. |
| | 545 | */ |
| | 546 | #ifndef BSS_FIRST_SECTIONS |
| | 547 | #define BSS_FIRST_SECTIONS |
| | 548 | #endif |
| | 549 | |
| | 550 | #define BSS(bss_align) \ |
| | 551 | . = ALIGN(bss_align); \ |
| | 552 | .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \ |
| | 553 | BSS_FIRST_SECTIONS \ |
| | 554 | *(.bss..page_aligned) \ |
| | 555 | *(.dynbss) \ |
| | 556 | *(.bss) \ |
| | 557 | *(COMMON) \ |
| | 558 | } |
| | 559 | |
| | 560 | /* |
| | 561 | * DWARF debug sections. |
| | 562 | * Symbols in the DWARF debugging sections are relative to |
| | 563 | * the beginning of the section so we begin them at 0. |
| | 564 | */ |
| | 565 | #define DWARF_DEBUG \ |
| | 566 | /* DWARF 1 */ \ |
| | 567 | .debug 0 : { *(.debug) } \ |
| | 568 | .line 0 : { *(.line) } \ |
| | 569 | /* GNU DWARF 1 extensions */ \ |
| | 570 | .debug_srcinfo 0 : { *(.debug_srcinfo) } \ |
| | 571 | .debug_sfnames 0 : { *(.debug_sfnames) } \ |
| | 572 | /* DWARF 1.1 and DWARF 2 */ \ |
| | 573 | .debug_aranges 0 : { *(.debug_aranges) } \ |
| | 574 | .debug_pubnames 0 : { *(.debug_pubnames) } \ |
| | 575 | /* DWARF 2 */ \ |
| | 576 | .debug_info 0 : { *(.debug_info \ |
| | 577 | .gnu.linkonce.wi.*) } \ |
| | 578 | .debug_abbrev 0 : { *(.debug_abbrev) } \ |
| | 579 | .debug_line 0 : { *(.debug_line) } \ |
| | 580 | .debug_frame 0 : { *(.debug_frame) } \ |
| | 581 | .debug_str 0 : { *(.debug_str) } \ |
| | 582 | .debug_loc 0 : { *(.debug_loc) } \ |
| | 583 | .debug_macinfo 0 : { *(.debug_macinfo) } \ |
| | 584 | /* SGI/MIPS DWARF 2 extensions */ \ |
| | 585 | .debug_weaknames 0 : { *(.debug_weaknames) } \ |
| | 586 | .debug_funcnames 0 : { *(.debug_funcnames) } \ |
| | 587 | .debug_typenames 0 : { *(.debug_typenames) } \ |
| | 588 | .debug_varnames 0 : { *(.debug_varnames) } \ |
| | 589 | |
| | 590 | /* Stabs debugging sections. */ |
| | 591 | #define STABS_DEBUG \ |
| | 592 | .stab 0 : { *(.stab) } \ |
| | 593 | .stabstr 0 : { *(.stabstr) } \ |
| | 594 | .stab.excl 0 : { *(.stab.excl) } \ |
| | 595 | .stab.exclstr 0 : { *(.stab.exclstr) } \ |
| | 596 | .stab.index 0 : { *(.stab.index) } \ |
| | 597 | .stab.indexstr 0 : { *(.stab.indexstr) } \ |
| | 598 | .comment 0 : { *(.comment) } |
| | 599 | |
| | 600 | #ifdef CONFIG_GENERIC_BUG |
| | 601 | #define BUG_TABLE \ |
| | 602 | . = ALIGN(8); \ |
| | 603 | __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \ |
| | 604 | VMLINUX_SYMBOL(__start___bug_table) = .; \ |
| | 605 | *(__bug_table) \ |
| | 606 | VMLINUX_SYMBOL(__stop___bug_table) = .; \ |
| | 607 | } |
| | 608 | #else |
| | 609 | #define BUG_TABLE |
| | 610 | #endif |
| | 611 | |
| | 612 | #ifdef CONFIG_PM_TRACE |
| | 613 | #define TRACEDATA \ |
| | 614 | . = ALIGN(4); \ |
| | 615 | .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \ |
| | 616 | VMLINUX_SYMBOL(__tracedata_start) = .; \ |
| | 617 | *(.tracedata) \ |
| | 618 | VMLINUX_SYMBOL(__tracedata_end) = .; \ |
| | 619 | } |
| | 620 | #else |
| | 621 | #define TRACEDATA |
| | 622 | #endif |
| | 623 | |
| | 624 | #define NOTES \ |
| | 625 | .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \ |
| | 626 | VMLINUX_SYMBOL(__start_notes) = .; \ |
| | 627 | *(.note.*) \ |
| | 628 | VMLINUX_SYMBOL(__stop_notes) = .; \ |
| | 629 | } |
| | 630 | |
| | 631 | #define INIT_SETUP(initsetup_align) \ |
| | 632 | . = ALIGN(initsetup_align); \ |
| | 633 | VMLINUX_SYMBOL(__setup_start) = .; \ |
| | 634 | *(.init.setup) \ |
| | 635 | VMLINUX_SYMBOL(__setup_end) = .; |
| | 636 | |
| | 637 | #define INIT_CALLS_LEVEL(level) \ |
| | 638 | VMLINUX_SYMBOL(__initcall##level##_start) = .; \ |
| | 639 | *(.initcall##level##.init) \ |
| | 640 | *(.initcall##level##s.init) \ |
| | 641 | |
| | 642 | #define INIT_CALLS \ |
| | 643 | VMLINUX_SYMBOL(__initcall_start) = .; \ |
| | 644 | *(.initcallearly.init) \ |
| | 645 | INIT_CALLS_LEVEL(0) \ |
| | 646 | INIT_CALLS_LEVEL(1) \ |
| | 647 | INIT_CALLS_LEVEL(2) \ |
| | 648 | INIT_CALLS_LEVEL(3) \ |
| | 649 | INIT_CALLS_LEVEL(4) \ |
| | 650 | INIT_CALLS_LEVEL(5) \ |
| | 651 | INIT_CALLS_LEVEL(rootfs) \ |
| | 652 | INIT_CALLS_LEVEL(6) \ |
| | 653 | INIT_CALLS_LEVEL(7) \ |
| | 654 | VMLINUX_SYMBOL(__initcall_end) = .; |
| | 655 | |
| | 656 | #define CON_INITCALL \ |
| | 657 | VMLINUX_SYMBOL(__con_initcall_start) = .; \ |
| | 658 | *(.con_initcall.init) \ |
| | 659 | VMLINUX_SYMBOL(__con_initcall_end) = .; |
| | 660 | |
| | 661 | #define SECURITY_INITCALL \ |
| | 662 | VMLINUX_SYMBOL(__security_initcall_start) = .; \ |
| | 663 | *(.security_initcall.init) \ |
| | 664 | VMLINUX_SYMBOL(__security_initcall_end) = .; |
| | 665 | |
| | 666 | #ifdef CONFIG_BLK_DEV_INITRD |
| | 667 | #define INIT_RAM_FS \ |
| | 668 | . = ALIGN(4); \ |
| | 669 | VMLINUX_SYMBOL(__initramfs_start) = .; \ |
| | 670 | *(.init.ramfs) \ |
| | 671 | . = ALIGN(8); \ |
| | 672 | *(.init.ramfs.info) |
| | 673 | #else |
| | 674 | #define INIT_RAM_FS |
| | 675 | #endif |
| | 676 | |
| | 677 | /* |
| | 678 | * Default discarded sections. |
| | 679 | * |
| | 680 | * Some archs want to discard exit text/data at runtime rather than |
| | 681 | * link time due to cross-section references such as alt instructions, |
| | 682 | * bug table, eh_frame, etc. DISCARDS must be the last of output |
| | 683 | * section definitions so that such archs put those in earlier section |
| | 684 | * definitions. |
| | 685 | */ |
| | 686 | #define DISCARDS \ |
| | 687 | /DISCARD/ : { \ |
| | 688 | EXIT_TEXT \ |
| | 689 | EXIT_DATA \ |
| | 690 | EXIT_CALL \ |
| | 691 | *(.discard) \ |
| | 692 | *(.discard.*) \ |
| | 693 | } |
| | 694 | |
| | 695 | /** |
| | 696 | * PERCPU_INPUT - the percpu input sections |
| | 697 | * @cacheline: cacheline size |
| | 698 | * |
| | 699 | * The core percpu section names and core symbols which do not rely |
| | 700 | * directly upon load addresses. |
| | 701 | * |
| | 702 | * @cacheline is used to align subsections to avoid false cacheline |
| | 703 | * sharing between subsections for different purposes. |
| | 704 | */ |
| | 705 | #define PERCPU_INPUT(cacheline) \ |
| | 706 | VMLINUX_SYMBOL(__per_cpu_start) = .; \ |
| | 707 | *(.data..percpu..first) \ |
| | 708 | . = ALIGN(PAGE_SIZE); \ |
| | 709 | *(.data..percpu..page_aligned) \ |
| | 710 | . = ALIGN(cacheline); \ |
| | 711 | *(.data..percpu..readmostly) \ |
| | 712 | . = ALIGN(cacheline); \ |
| | 713 | *(.data..percpu) \ |
| | 714 | *(.data..percpu..shared_aligned) \ |
| | 715 | VMLINUX_SYMBOL(__per_cpu_end) = .; |
| | 716 | |
| | 717 | /** |
| | 718 | * PERCPU_VADDR - define output section for percpu area |
| | 719 | * @cacheline: cacheline size |
| | 720 | * @vaddr: explicit base address (optional) |
| | 721 | * @phdr: destination PHDR (optional) |
| | 722 | * |
| | 723 | * Macro which expands to output section for percpu area. |
| | 724 | * |
| | 725 | * @cacheline is used to align subsections to avoid false cacheline |
| | 726 | * sharing between subsections for different purposes. |
| | 727 | * |
| | 728 | * If @vaddr is not blank, it specifies explicit base address and all |
| | 729 | * percpu symbols will be offset from the given address. If blank, |
| | 730 | * @vaddr always equals @laddr + LOAD_OFFSET. |
| | 731 | * |
| | 732 | * @phdr defines the output PHDR to use if not blank. Be warned that |
| | 733 | * output PHDR is sticky. If @phdr is specified, the next output |
| | 734 | * section in the linker script will go there too. @phdr should have |
| | 735 | * a leading colon. |
| | 736 | * |
| | 737 | * Note that this macros defines __per_cpu_load as an absolute symbol. |
| | 738 | * If there is no need to put the percpu section at a predetermined |
| | 739 | * address, use PERCPU_SECTION. |
| | 740 | */ |
| | 741 | #define PERCPU_VADDR(cacheline, vaddr, phdr) \ |
| | 742 | VMLINUX_SYMBOL(__per_cpu_load) = .; \ |
| | 743 | .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \ |
| | 744 | - LOAD_OFFSET) { \ |
| | 745 | PERCPU_INPUT(cacheline) \ |
| | 746 | } phdr \ |
| | 747 | . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu); |
| | 748 | |
| | 749 | /** |
| | 750 | * PERCPU_SECTION - define output section for percpu area, simple version |
| | 751 | * @cacheline: cacheline size |
| | 752 | * |
| | 753 | * Align to PAGE_SIZE and outputs output section for percpu area. This |
| | 754 | * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and |
| | 755 | * __per_cpu_start will be identical. |
| | 756 | * |
| | 757 | * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,) |
| | 758 | * except that __per_cpu_load is defined as a relative symbol against |
| | 759 | * .data..percpu which is required for relocatable x86_32 configuration. |
| | 760 | */ |
| | 761 | #define PERCPU_SECTION(cacheline) \ |
| | 762 | . = ALIGN(PAGE_SIZE); \ |
| | 763 | .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \ |
| | 764 | VMLINUX_SYMBOL(__per_cpu_load) = .; \ |
| | 765 | PERCPU_INPUT(cacheline) \ |
| | 766 | } |
| | 767 | |
| | 768 | |
| | 769 | /* |
| | 770 | * Definition of the high level *_SECTION macros |
| | 771 | * They will fit only a subset of the architectures |
| | 772 | */ |
| | 773 | |
| | 774 | |
| | 775 | /* |
| | 776 | * Writeable data. |
| | 777 | * All sections are combined in a single .data section. |
| | 778 | * The sections following CONSTRUCTORS are arranged so their |
| | 779 | * typical alignment matches. |
| | 780 | * A cacheline is typical/always less than a PAGE_SIZE so |
| | 781 | * the sections that has this restriction (or similar) |
| | 782 | * is located before the ones requiring PAGE_SIZE alignment. |
| | 783 | * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which |
| | 784 | * matches the requirement of PAGE_ALIGNED_DATA. |
| | 785 | * |
| | 786 | * use 0 as page_align if page_aligned data is not used */ |
| | 787 | #define RW_DATA_SECTION(cacheline, pagealigned, inittask) \ |
| | 788 | . = ALIGN(PAGE_SIZE); \ |
| | 789 | .data : AT(ADDR(.data) - LOAD_OFFSET) { \ |
| | 790 | INIT_TASK_DATA(inittask) \ |
| | 791 | NOSAVE_DATA \ |
| | 792 | PAGE_ALIGNED_DATA(pagealigned) \ |
| | 793 | CACHELINE_ALIGNED_DATA(cacheline) \ |
| | 794 | READ_MOSTLY_DATA(cacheline) \ |
| | 795 | DATA_DATA \ |
| | 796 | CONSTRUCTORS \ |
| | 797 | } |
| | 798 | |
| | 799 | #define INIT_TEXT_SECTION(inittext_align) \ |
| | 800 | . = ALIGN(inittext_align); \ |
| | 801 | .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \ |
| | 802 | VMLINUX_SYMBOL(_sinittext) = .; \ |
| | 803 | INIT_TEXT \ |
| | 804 | VMLINUX_SYMBOL(_einittext) = .; \ |
| | 805 | } |
| | 806 | |
| | 807 | #define INIT_DATA_SECTION(initsetup_align) \ |
| | 808 | .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \ |
| | 809 | INIT_DATA \ |
| | 810 | INIT_SETUP(initsetup_align) \ |
| | 811 | INIT_CALLS \ |
| | 812 | CON_INITCALL \ |
| | 813 | SECURITY_INITCALL \ |
| | 814 | INIT_RAM_FS \ |
| | 815 | } |
| | 816 | |
| | 817 | #define BSS_SECTION(sbss_align, bss_align, stop_align) \ |
| | 818 | . = ALIGN(sbss_align); \ |
| | 819 | VMLINUX_SYMBOL(__bss_start) = .; \ |
| | 820 | SBSS(sbss_align) \ |
| | 821 | BSS(bss_align) \ |
| | 822 | . = ALIGN(stop_align); \ |
| | 823 | VMLINUX_SYMBOL(__bss_stop) = .; |
projects / deliverable / linux.git / blame_incremental