vmlinux.lds.h 16 KB

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  1. #ifndef LOAD_OFFSET
  2. #define LOAD_OFFSET 0
  3. #endif
  4. #ifndef VMLINUX_SYMBOL
  5. #define VMLINUX_SYMBOL(_sym_) _sym_
  6. #endif
  7. /* Align . to a 8 byte boundary equals to maximum function alignment. */
  8. #define ALIGN_FUNCTION() . = ALIGN(8)
  9. /* The actual configuration determine if the init/exit sections
  10. * are handled as text/data or they can be discarded (which
  11. * often happens at runtime)
  12. */
  13. #ifdef CONFIG_HOTPLUG
  14. #define DEV_KEEP(sec) *(.dev##sec)
  15. #define DEV_DISCARD(sec)
  16. #else
  17. #define DEV_KEEP(sec)
  18. #define DEV_DISCARD(sec) *(.dev##sec)
  19. #endif
  20. #ifdef CONFIG_HOTPLUG_CPU
  21. #define CPU_KEEP(sec) *(.cpu##sec)
  22. #define CPU_DISCARD(sec)
  23. #else
  24. #define CPU_KEEP(sec)
  25. #define CPU_DISCARD(sec) *(.cpu##sec)
  26. #endif
  27. #if defined(CONFIG_MEMORY_HOTPLUG)
  28. #define MEM_KEEP(sec) *(.mem##sec)
  29. #define MEM_DISCARD(sec)
  30. #else
  31. #define MEM_KEEP(sec)
  32. #define MEM_DISCARD(sec) *(.mem##sec)
  33. #endif
  34. #ifdef CONFIG_FTRACE_MCOUNT_RECORD
  35. #define MCOUNT_REC() VMLINUX_SYMBOL(__start_mcount_loc) = .; \
  36. *(__mcount_loc) \
  37. VMLINUX_SYMBOL(__stop_mcount_loc) = .;
  38. #else
  39. #define MCOUNT_REC()
  40. #endif
  41. #ifdef CONFIG_TRACE_BRANCH_PROFILING
  42. #define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \
  43. *(_ftrace_annotated_branch) \
  44. VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .;
  45. #else
  46. #define LIKELY_PROFILE()
  47. #endif
  48. #ifdef CONFIG_PROFILE_ALL_BRANCHES
  49. #define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \
  50. *(_ftrace_branch) \
  51. VMLINUX_SYMBOL(__stop_branch_profile) = .;
  52. #else
  53. #define BRANCH_PROFILE()
  54. #endif
  55. #ifdef CONFIG_EVENT_TRACER
  56. #define FTRACE_EVENTS() VMLINUX_SYMBOL(__start_ftrace_events) = .; \
  57. *(_ftrace_events) \
  58. VMLINUX_SYMBOL(__stop_ftrace_events) = .;
  59. #else
  60. #define FTRACE_EVENTS()
  61. #endif
  62. #ifdef CONFIG_TRACING
  63. #define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \
  64. *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \
  65. VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .;
  66. #else
  67. #define TRACE_PRINTKS()
  68. #endif
  69. #ifdef CONFIG_FTRACE_SYSCALLS
  70. #define TRACE_SYSCALLS() VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \
  71. *(__syscalls_metadata) \
  72. VMLINUX_SYMBOL(__stop_syscalls_metadata) = .;
  73. #else
  74. #define TRACE_SYSCALLS()
  75. #endif
  76. /* .data section */
  77. #define DATA_DATA \
  78. *(.data) \
  79. *(.data.init.refok) \
  80. *(.ref.data) \
  81. DEV_KEEP(init.data) \
  82. DEV_KEEP(exit.data) \
  83. CPU_KEEP(init.data) \
  84. CPU_KEEP(exit.data) \
  85. MEM_KEEP(init.data) \
  86. MEM_KEEP(exit.data) \
  87. . = ALIGN(8); \
  88. VMLINUX_SYMBOL(__start___markers) = .; \
  89. *(__markers) \
  90. VMLINUX_SYMBOL(__stop___markers) = .; \
  91. . = ALIGN(32); \
  92. VMLINUX_SYMBOL(__start___tracepoints) = .; \
  93. *(__tracepoints) \
  94. VMLINUX_SYMBOL(__stop___tracepoints) = .; \
  95. /* implement dynamic printk debug */ \
  96. . = ALIGN(8); \
  97. VMLINUX_SYMBOL(__start___verbose) = .; \
  98. *(__verbose) \
  99. VMLINUX_SYMBOL(__stop___verbose) = .; \
  100. LIKELY_PROFILE() \
  101. BRANCH_PROFILE() \
  102. TRACE_PRINTKS() \
  103. FTRACE_EVENTS() \
  104. TRACE_SYSCALLS()
  105. #define RO_DATA(align) \
  106. . = ALIGN((align)); \
  107. .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \
  108. VMLINUX_SYMBOL(__start_rodata) = .; \
  109. *(.rodata) *(.rodata.*) \
  110. *(__vermagic) /* Kernel version magic */ \
  111. *(__markers_strings) /* Markers: strings */ \
  112. *(__tracepoints_strings)/* Tracepoints: strings */ \
  113. } \
  114. \
  115. .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \
  116. *(.rodata1) \
  117. } \
  118. \
  119. BUG_TABLE \
  120. \
  121. /* PCI quirks */ \
  122. .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \
  123. VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \
  124. *(.pci_fixup_early) \
  125. VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \
  126. VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \
  127. *(.pci_fixup_header) \
  128. VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \
  129. VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \
  130. *(.pci_fixup_final) \
  131. VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \
  132. VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \
  133. *(.pci_fixup_enable) \
  134. VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \
  135. VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \
  136. *(.pci_fixup_resume) \
  137. VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \
  138. VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \
  139. *(.pci_fixup_resume_early) \
  140. VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \
  141. VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \
  142. *(.pci_fixup_suspend) \
  143. VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \
  144. } \
  145. \
  146. /* Built-in firmware blobs */ \
  147. .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \
  148. VMLINUX_SYMBOL(__start_builtin_fw) = .; \
  149. *(.builtin_fw) \
  150. VMLINUX_SYMBOL(__end_builtin_fw) = .; \
  151. } \
  152. \
  153. /* RapidIO route ops */ \
  154. .rio_route : AT(ADDR(.rio_route) - LOAD_OFFSET) { \
  155. VMLINUX_SYMBOL(__start_rio_route_ops) = .; \
  156. *(.rio_route_ops) \
  157. VMLINUX_SYMBOL(__end_rio_route_ops) = .; \
  158. } \
  159. \
  160. TRACEDATA \
  161. \
  162. /* Kernel symbol table: Normal symbols */ \
  163. __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \
  164. VMLINUX_SYMBOL(__start___ksymtab) = .; \
  165. *(__ksymtab) \
  166. VMLINUX_SYMBOL(__stop___ksymtab) = .; \
  167. } \
  168. \
  169. /* Kernel symbol table: GPL-only symbols */ \
  170. __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \
  171. VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \
  172. *(__ksymtab_gpl) \
  173. VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \
  174. } \
  175. \
  176. /* Kernel symbol table: Normal unused symbols */ \
  177. __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \
  178. VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \
  179. *(__ksymtab_unused) \
  180. VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \
  181. } \
  182. \
  183. /* Kernel symbol table: GPL-only unused symbols */ \
  184. __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
  185. VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \
  186. *(__ksymtab_unused_gpl) \
  187. VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \
  188. } \
  189. \
  190. /* Kernel symbol table: GPL-future-only symbols */ \
  191. __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
  192. VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \
  193. *(__ksymtab_gpl_future) \
  194. VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \
  195. } \
  196. \
  197. /* Kernel symbol table: Normal symbols */ \
  198. __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \
  199. VMLINUX_SYMBOL(__start___kcrctab) = .; \
  200. *(__kcrctab) \
  201. VMLINUX_SYMBOL(__stop___kcrctab) = .; \
  202. } \
  203. \
  204. /* Kernel symbol table: GPL-only symbols */ \
  205. __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \
  206. VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \
  207. *(__kcrctab_gpl) \
  208. VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \
  209. } \
  210. \
  211. /* Kernel symbol table: Normal unused symbols */ \
  212. __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \
  213. VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \
  214. *(__kcrctab_unused) \
  215. VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \
  216. } \
  217. \
  218. /* Kernel symbol table: GPL-only unused symbols */ \
  219. __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
  220. VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \
  221. *(__kcrctab_unused_gpl) \
  222. VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \
  223. } \
  224. \
  225. /* Kernel symbol table: GPL-future-only symbols */ \
  226. __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
  227. VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \
  228. *(__kcrctab_gpl_future) \
  229. VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \
  230. } \
  231. \
  232. /* Kernel symbol table: strings */ \
  233. __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
  234. *(__ksymtab_strings) \
  235. } \
  236. \
  237. /* __*init sections */ \
  238. __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \
  239. *(.ref.rodata) \
  240. MCOUNT_REC() \
  241. DEV_KEEP(init.rodata) \
  242. DEV_KEEP(exit.rodata) \
  243. CPU_KEEP(init.rodata) \
  244. CPU_KEEP(exit.rodata) \
  245. MEM_KEEP(init.rodata) \
  246. MEM_KEEP(exit.rodata) \
  247. } \
  248. \
  249. /* Built-in module parameters. */ \
  250. __param : AT(ADDR(__param) - LOAD_OFFSET) { \
  251. VMLINUX_SYMBOL(__start___param) = .; \
  252. *(__param) \
  253. VMLINUX_SYMBOL(__stop___param) = .; \
  254. . = ALIGN((align)); \
  255. VMLINUX_SYMBOL(__end_rodata) = .; \
  256. } \
  257. . = ALIGN((align));
  258. /* RODATA provided for backward compatibility.
  259. * All archs are supposed to use RO_DATA() */
  260. #define RODATA RO_DATA(4096)
  261. #define SECURITY_INIT \
  262. .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
  263. VMLINUX_SYMBOL(__security_initcall_start) = .; \
  264. *(.security_initcall.init) \
  265. VMLINUX_SYMBOL(__security_initcall_end) = .; \
  266. }
  267. /* .text section. Map to function alignment to avoid address changes
  268. * during second ld run in second ld pass when generating System.map */
  269. #define TEXT_TEXT \
  270. ALIGN_FUNCTION(); \
  271. *(.text.hot) \
  272. *(.text) \
  273. *(.ref.text) \
  274. *(.text.init.refok) \
  275. *(.exit.text.refok) \
  276. DEV_KEEP(init.text) \
  277. DEV_KEEP(exit.text) \
  278. CPU_KEEP(init.text) \
  279. CPU_KEEP(exit.text) \
  280. MEM_KEEP(init.text) \
  281. MEM_KEEP(exit.text) \
  282. *(.text.unlikely)
  283. /* sched.text is aling to function alignment to secure we have same
  284. * address even at second ld pass when generating System.map */
  285. #define SCHED_TEXT \
  286. ALIGN_FUNCTION(); \
  287. VMLINUX_SYMBOL(__sched_text_start) = .; \
  288. *(.sched.text) \
  289. VMLINUX_SYMBOL(__sched_text_end) = .;
  290. /* spinlock.text is aling to function alignment to secure we have same
  291. * address even at second ld pass when generating System.map */
  292. #define LOCK_TEXT \
  293. ALIGN_FUNCTION(); \
  294. VMLINUX_SYMBOL(__lock_text_start) = .; \
  295. *(.spinlock.text) \
  296. VMLINUX_SYMBOL(__lock_text_end) = .;
  297. #define KPROBES_TEXT \
  298. ALIGN_FUNCTION(); \
  299. VMLINUX_SYMBOL(__kprobes_text_start) = .; \
  300. *(.kprobes.text) \
  301. VMLINUX_SYMBOL(__kprobes_text_end) = .;
  302. #ifdef CONFIG_FUNCTION_GRAPH_TRACER
  303. #define IRQENTRY_TEXT \
  304. ALIGN_FUNCTION(); \
  305. VMLINUX_SYMBOL(__irqentry_text_start) = .; \
  306. *(.irqentry.text) \
  307. VMLINUX_SYMBOL(__irqentry_text_end) = .;
  308. #else
  309. #define IRQENTRY_TEXT
  310. #endif
  311. /* Section used for early init (in .S files) */
  312. #define HEAD_TEXT *(.head.text)
  313. /* init and exit section handling */
  314. #define INIT_DATA \
  315. *(.init.data) \
  316. DEV_DISCARD(init.data) \
  317. DEV_DISCARD(init.rodata) \
  318. CPU_DISCARD(init.data) \
  319. CPU_DISCARD(init.rodata) \
  320. MEM_DISCARD(init.data) \
  321. MEM_DISCARD(init.rodata)
  322. #define INIT_TEXT \
  323. *(.init.text) \
  324. DEV_DISCARD(init.text) \
  325. CPU_DISCARD(init.text) \
  326. MEM_DISCARD(init.text)
  327. #define EXIT_DATA \
  328. *(.exit.data) \
  329. DEV_DISCARD(exit.data) \
  330. DEV_DISCARD(exit.rodata) \
  331. CPU_DISCARD(exit.data) \
  332. CPU_DISCARD(exit.rodata) \
  333. MEM_DISCARD(exit.data) \
  334. MEM_DISCARD(exit.rodata)
  335. #define EXIT_TEXT \
  336. *(.exit.text) \
  337. DEV_DISCARD(exit.text) \
  338. CPU_DISCARD(exit.text) \
  339. MEM_DISCARD(exit.text)
  340. /* DWARF debug sections.
  341. Symbols in the DWARF debugging sections are relative to
  342. the beginning of the section so we begin them at 0. */
  343. #define DWARF_DEBUG \
  344. /* DWARF 1 */ \
  345. .debug 0 : { *(.debug) } \
  346. .line 0 : { *(.line) } \
  347. /* GNU DWARF 1 extensions */ \
  348. .debug_srcinfo 0 : { *(.debug_srcinfo) } \
  349. .debug_sfnames 0 : { *(.debug_sfnames) } \
  350. /* DWARF 1.1 and DWARF 2 */ \
  351. .debug_aranges 0 : { *(.debug_aranges) } \
  352. .debug_pubnames 0 : { *(.debug_pubnames) } \
  353. /* DWARF 2 */ \
  354. .debug_info 0 : { *(.debug_info \
  355. .gnu.linkonce.wi.*) } \
  356. .debug_abbrev 0 : { *(.debug_abbrev) } \
  357. .debug_line 0 : { *(.debug_line) } \
  358. .debug_frame 0 : { *(.debug_frame) } \
  359. .debug_str 0 : { *(.debug_str) } \
  360. .debug_loc 0 : { *(.debug_loc) } \
  361. .debug_macinfo 0 : { *(.debug_macinfo) } \
  362. /* SGI/MIPS DWARF 2 extensions */ \
  363. .debug_weaknames 0 : { *(.debug_weaknames) } \
  364. .debug_funcnames 0 : { *(.debug_funcnames) } \
  365. .debug_typenames 0 : { *(.debug_typenames) } \
  366. .debug_varnames 0 : { *(.debug_varnames) } \
  367. /* Stabs debugging sections. */
  368. #define STABS_DEBUG \
  369. .stab 0 : { *(.stab) } \
  370. .stabstr 0 : { *(.stabstr) } \
  371. .stab.excl 0 : { *(.stab.excl) } \
  372. .stab.exclstr 0 : { *(.stab.exclstr) } \
  373. .stab.index 0 : { *(.stab.index) } \
  374. .stab.indexstr 0 : { *(.stab.indexstr) } \
  375. .comment 0 : { *(.comment) }
  376. #ifdef CONFIG_GENERIC_BUG
  377. #define BUG_TABLE \
  378. . = ALIGN(8); \
  379. __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \
  380. VMLINUX_SYMBOL(__start___bug_table) = .; \
  381. *(__bug_table) \
  382. VMLINUX_SYMBOL(__stop___bug_table) = .; \
  383. }
  384. #else
  385. #define BUG_TABLE
  386. #endif
  387. #ifdef CONFIG_PM_TRACE
  388. #define TRACEDATA \
  389. . = ALIGN(4); \
  390. .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \
  391. VMLINUX_SYMBOL(__tracedata_start) = .; \
  392. *(.tracedata) \
  393. VMLINUX_SYMBOL(__tracedata_end) = .; \
  394. }
  395. #else
  396. #define TRACEDATA
  397. #endif
  398. #define NOTES \
  399. .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \
  400. VMLINUX_SYMBOL(__start_notes) = .; \
  401. *(.note.*) \
  402. VMLINUX_SYMBOL(__stop_notes) = .; \
  403. }
  404. #define INITCALLS \
  405. *(.initcallearly.init) \
  406. VMLINUX_SYMBOL(__early_initcall_end) = .; \
  407. *(.initcall0.init) \
  408. *(.initcall0s.init) \
  409. *(.initcall1.init) \
  410. *(.initcall1s.init) \
  411. *(.initcall2.init) \
  412. *(.initcall2s.init) \
  413. *(.initcall3.init) \
  414. *(.initcall3s.init) \
  415. *(.initcall4.init) \
  416. *(.initcall4s.init) \
  417. *(.initcall5.init) \
  418. *(.initcall5s.init) \
  419. *(.initcallrootfs.init) \
  420. *(.initcall6.init) \
  421. *(.initcall6s.init) \
  422. *(.initcall7.init) \
  423. *(.initcall7s.init)
  424. /**
  425. * PERCPU_VADDR - define output section for percpu area
  426. * @vaddr: explicit base address (optional)
  427. * @phdr: destination PHDR (optional)
  428. *
  429. * Macro which expands to output section for percpu area. If @vaddr
  430. * is not blank, it specifies explicit base address and all percpu
  431. * symbols will be offset from the given address. If blank, @vaddr
  432. * always equals @laddr + LOAD_OFFSET.
  433. *
  434. * @phdr defines the output PHDR to use if not blank. Be warned that
  435. * output PHDR is sticky. If @phdr is specified, the next output
  436. * section in the linker script will go there too. @phdr should have
  437. * a leading colon.
  438. *
  439. * Note that this macros defines __per_cpu_load as an absolute symbol.
  440. * If there is no need to put the percpu section at a predetermined
  441. * address, use PERCPU().
  442. */
  443. #define PERCPU_VADDR(vaddr, phdr) \
  444. VMLINUX_SYMBOL(__per_cpu_load) = .; \
  445. .data.percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \
  446. - LOAD_OFFSET) { \
  447. VMLINUX_SYMBOL(__per_cpu_start) = .; \
  448. *(.data.percpu.first) \
  449. *(.data.percpu.page_aligned) \
  450. *(.data.percpu) \
  451. *(.data.percpu.shared_aligned) \
  452. VMLINUX_SYMBOL(__per_cpu_end) = .; \
  453. } phdr \
  454. . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data.percpu);
  455. /**
  456. * PERCPU - define output section for percpu area, simple version
  457. * @align: required alignment
  458. *
  459. * Align to @align and outputs output section for percpu area. This
  460. * macro doesn't maniuplate @vaddr or @phdr and __per_cpu_load and
  461. * __per_cpu_start will be identical.
  462. *
  463. * This macro is equivalent to ALIGN(align); PERCPU_VADDR( , ) except
  464. * that __per_cpu_load is defined as a relative symbol against
  465. * .data.percpu which is required for relocatable x86_32
  466. * configuration.
  467. */
  468. #define PERCPU(align) \
  469. . = ALIGN(align); \
  470. .data.percpu : AT(ADDR(.data.percpu) - LOAD_OFFSET) { \
  471. VMLINUX_SYMBOL(__per_cpu_load) = .; \
  472. VMLINUX_SYMBOL(__per_cpu_start) = .; \
  473. *(.data.percpu.first) \
  474. *(.data.percpu.page_aligned) \
  475. *(.data.percpu) \
  476. *(.data.percpu.shared_aligned) \
  477. VMLINUX_SYMBOL(__per_cpu_end) = .; \
  478. }