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