vmlinux.lds.h 16 KB

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  1. #include <linux/section-names.h>
  2. #ifndef LOAD_OFFSET
  3. #define LOAD_OFFSET 0
  4. #endif
  5. #ifndef VMLINUX_SYMBOL
  6. #define VMLINUX_SYMBOL(_sym_) _sym_
  7. #endif
  8. /* Align . to a 8 byte boundary equals to maximum function alignment. */
  9. #define ALIGN_FUNCTION() . = ALIGN(8)
  10. /* The actual configuration determine if the init/exit sections
  11. * are handled as text/data or they can be discarded (which
  12. * often happens at runtime)
  13. */
  14. #ifdef CONFIG_HOTPLUG
  15. #define DEV_KEEP(sec) *(.dev##sec)
  16. #define DEV_DISCARD(sec)
  17. #else
  18. #define DEV_KEEP(sec)
  19. #define DEV_DISCARD(sec) *(.dev##sec)
  20. #endif
  21. #ifdef CONFIG_HOTPLUG_CPU
  22. #define CPU_KEEP(sec) *(.cpu##sec)
  23. #define CPU_DISCARD(sec)
  24. #else
  25. #define CPU_KEEP(sec)
  26. #define CPU_DISCARD(sec) *(.cpu##sec)
  27. #endif
  28. #if defined(CONFIG_MEMORY_HOTPLUG)
  29. #define MEM_KEEP(sec) *(.mem##sec)
  30. #define MEM_DISCARD(sec)
  31. #else
  32. #define MEM_KEEP(sec)
  33. #define MEM_DISCARD(sec) *(.mem##sec)
  34. #endif
  35. #ifdef CONFIG_FTRACE_MCOUNT_RECORD
  36. #define MCOUNT_REC() VMLINUX_SYMBOL(__start_mcount_loc) = .; \
  37. *(__mcount_loc) \
  38. VMLINUX_SYMBOL(__stop_mcount_loc) = .;
  39. #else
  40. #define MCOUNT_REC()
  41. #endif
  42. #ifdef CONFIG_TRACE_BRANCH_PROFILING
  43. #define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \
  44. *(_ftrace_annotated_branch) \
  45. VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .;
  46. #else
  47. #define LIKELY_PROFILE()
  48. #endif
  49. #ifdef CONFIG_PROFILE_ALL_BRANCHES
  50. #define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \
  51. *(_ftrace_branch) \
  52. VMLINUX_SYMBOL(__stop_branch_profile) = .;
  53. #else
  54. #define BRANCH_PROFILE()
  55. #endif
  56. #ifdef CONFIG_EVENT_TRACER
  57. #define FTRACE_EVENTS() VMLINUX_SYMBOL(__start_ftrace_events) = .; \
  58. *(_ftrace_events) \
  59. VMLINUX_SYMBOL(__stop_ftrace_events) = .;
  60. #else
  61. #define FTRACE_EVENTS()
  62. #endif
  63. #ifdef CONFIG_TRACING
  64. #define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \
  65. *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \
  66. VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .;
  67. #else
  68. #define TRACE_PRINTKS()
  69. #endif
  70. #ifdef CONFIG_FTRACE_SYSCALLS
  71. #define TRACE_SYSCALLS() VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \
  72. *(__syscalls_metadata) \
  73. VMLINUX_SYMBOL(__stop_syscalls_metadata) = .;
  74. #else
  75. #define TRACE_SYSCALLS()
  76. #endif
  77. /* .data section */
  78. #define DATA_DATA \
  79. *(.data) \
  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. DEV_KEEP(init.text) \
  275. DEV_KEEP(exit.text) \
  276. CPU_KEEP(init.text) \
  277. CPU_KEEP(exit.text) \
  278. MEM_KEEP(init.text) \
  279. MEM_KEEP(exit.text) \
  280. *(.text.unlikely)
  281. /* sched.text is aling to function alignment to secure we have same
  282. * address even at second ld pass when generating System.map */
  283. #define SCHED_TEXT \
  284. ALIGN_FUNCTION(); \
  285. VMLINUX_SYMBOL(__sched_text_start) = .; \
  286. *(.sched.text) \
  287. VMLINUX_SYMBOL(__sched_text_end) = .;
  288. /* spinlock.text is aling to function alignment to secure we have same
  289. * address even at second ld pass when generating System.map */
  290. #define LOCK_TEXT \
  291. ALIGN_FUNCTION(); \
  292. VMLINUX_SYMBOL(__lock_text_start) = .; \
  293. *(.spinlock.text) \
  294. VMLINUX_SYMBOL(__lock_text_end) = .;
  295. #define KPROBES_TEXT \
  296. ALIGN_FUNCTION(); \
  297. VMLINUX_SYMBOL(__kprobes_text_start) = .; \
  298. *(.kprobes.text) \
  299. VMLINUX_SYMBOL(__kprobes_text_end) = .;
  300. #ifdef CONFIG_FUNCTION_GRAPH_TRACER
  301. #define IRQENTRY_TEXT \
  302. ALIGN_FUNCTION(); \
  303. VMLINUX_SYMBOL(__irqentry_text_start) = .; \
  304. *(.irqentry.text) \
  305. VMLINUX_SYMBOL(__irqentry_text_end) = .;
  306. #else
  307. #define IRQENTRY_TEXT
  308. #endif
  309. /* Section used for early init (in .S files) */
  310. #define HEAD_TEXT *(HEAD_TEXT_SECTION)
  311. /* init and exit section handling */
  312. #define INIT_DATA \
  313. *(.init.data) \
  314. DEV_DISCARD(init.data) \
  315. DEV_DISCARD(init.rodata) \
  316. CPU_DISCARD(init.data) \
  317. CPU_DISCARD(init.rodata) \
  318. MEM_DISCARD(init.data) \
  319. MEM_DISCARD(init.rodata)
  320. #define INIT_TEXT \
  321. *(.init.text) \
  322. DEV_DISCARD(init.text) \
  323. CPU_DISCARD(init.text) \
  324. MEM_DISCARD(init.text)
  325. #define EXIT_DATA \
  326. *(.exit.data) \
  327. DEV_DISCARD(exit.data) \
  328. DEV_DISCARD(exit.rodata) \
  329. CPU_DISCARD(exit.data) \
  330. CPU_DISCARD(exit.rodata) \
  331. MEM_DISCARD(exit.data) \
  332. MEM_DISCARD(exit.rodata)
  333. #define EXIT_TEXT \
  334. *(.exit.text) \
  335. DEV_DISCARD(exit.text) \
  336. CPU_DISCARD(exit.text) \
  337. MEM_DISCARD(exit.text)
  338. /* DWARF debug sections.
  339. Symbols in the DWARF debugging sections are relative to
  340. the beginning of the section so we begin them at 0. */
  341. #define DWARF_DEBUG \
  342. /* DWARF 1 */ \
  343. .debug 0 : { *(.debug) } \
  344. .line 0 : { *(.line) } \
  345. /* GNU DWARF 1 extensions */ \
  346. .debug_srcinfo 0 : { *(.debug_srcinfo) } \
  347. .debug_sfnames 0 : { *(.debug_sfnames) } \
  348. /* DWARF 1.1 and DWARF 2 */ \
  349. .debug_aranges 0 : { *(.debug_aranges) } \
  350. .debug_pubnames 0 : { *(.debug_pubnames) } \
  351. /* DWARF 2 */ \
  352. .debug_info 0 : { *(.debug_info \
  353. .gnu.linkonce.wi.*) } \
  354. .debug_abbrev 0 : { *(.debug_abbrev) } \
  355. .debug_line 0 : { *(.debug_line) } \
  356. .debug_frame 0 : { *(.debug_frame) } \
  357. .debug_str 0 : { *(.debug_str) } \
  358. .debug_loc 0 : { *(.debug_loc) } \
  359. .debug_macinfo 0 : { *(.debug_macinfo) } \
  360. /* SGI/MIPS DWARF 2 extensions */ \
  361. .debug_weaknames 0 : { *(.debug_weaknames) } \
  362. .debug_funcnames 0 : { *(.debug_funcnames) } \
  363. .debug_typenames 0 : { *(.debug_typenames) } \
  364. .debug_varnames 0 : { *(.debug_varnames) } \
  365. /* Stabs debugging sections. */
  366. #define STABS_DEBUG \
  367. .stab 0 : { *(.stab) } \
  368. .stabstr 0 : { *(.stabstr) } \
  369. .stab.excl 0 : { *(.stab.excl) } \
  370. .stab.exclstr 0 : { *(.stab.exclstr) } \
  371. .stab.index 0 : { *(.stab.index) } \
  372. .stab.indexstr 0 : { *(.stab.indexstr) } \
  373. .comment 0 : { *(.comment) }
  374. #ifdef CONFIG_GENERIC_BUG
  375. #define BUG_TABLE \
  376. . = ALIGN(8); \
  377. __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \
  378. VMLINUX_SYMBOL(__start___bug_table) = .; \
  379. *(__bug_table) \
  380. VMLINUX_SYMBOL(__stop___bug_table) = .; \
  381. }
  382. #else
  383. #define BUG_TABLE
  384. #endif
  385. #ifdef CONFIG_PM_TRACE
  386. #define TRACEDATA \
  387. . = ALIGN(4); \
  388. .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \
  389. VMLINUX_SYMBOL(__tracedata_start) = .; \
  390. *(.tracedata) \
  391. VMLINUX_SYMBOL(__tracedata_end) = .; \
  392. }
  393. #else
  394. #define TRACEDATA
  395. #endif
  396. #define NOTES \
  397. .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \
  398. VMLINUX_SYMBOL(__start_notes) = .; \
  399. *(.note.*) \
  400. VMLINUX_SYMBOL(__stop_notes) = .; \
  401. }
  402. #define INITCALLS \
  403. *(.initcallearly.init) \
  404. VMLINUX_SYMBOL(__early_initcall_end) = .; \
  405. *(.initcall0.init) \
  406. *(.initcall0s.init) \
  407. *(.initcall1.init) \
  408. *(.initcall1s.init) \
  409. *(.initcall2.init) \
  410. *(.initcall2s.init) \
  411. *(.initcall3.init) \
  412. *(.initcall3s.init) \
  413. *(.initcall4.init) \
  414. *(.initcall4s.init) \
  415. *(.initcall5.init) \
  416. *(.initcall5s.init) \
  417. *(.initcallrootfs.init) \
  418. *(.initcall6.init) \
  419. *(.initcall6s.init) \
  420. *(.initcall7.init) \
  421. *(.initcall7s.init)
  422. /**
  423. * PERCPU_VADDR - define output section for percpu area
  424. * @vaddr: explicit base address (optional)
  425. * @phdr: destination PHDR (optional)
  426. *
  427. * Macro which expands to output section for percpu area. If @vaddr
  428. * is not blank, it specifies explicit base address and all percpu
  429. * symbols will be offset from the given address. If blank, @vaddr
  430. * always equals @laddr + LOAD_OFFSET.
  431. *
  432. * @phdr defines the output PHDR to use if not blank. Be warned that
  433. * output PHDR is sticky. If @phdr is specified, the next output
  434. * section in the linker script will go there too. @phdr should have
  435. * a leading colon.
  436. *
  437. * Note that this macros defines __per_cpu_load as an absolute symbol.
  438. * If there is no need to put the percpu section at a predetermined
  439. * address, use PERCPU().
  440. */
  441. #define PERCPU_VADDR(vaddr, phdr) \
  442. VMLINUX_SYMBOL(__per_cpu_load) = .; \
  443. .data.percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \
  444. - LOAD_OFFSET) { \
  445. VMLINUX_SYMBOL(__per_cpu_start) = .; \
  446. *(.data.percpu.first) \
  447. *(.data.percpu.page_aligned) \
  448. *(.data.percpu) \
  449. *(.data.percpu.shared_aligned) \
  450. VMLINUX_SYMBOL(__per_cpu_end) = .; \
  451. } phdr \
  452. . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data.percpu);
  453. /**
  454. * PERCPU - define output section for percpu area, simple version
  455. * @align: required alignment
  456. *
  457. * Align to @align and outputs output section for percpu area. This
  458. * macro doesn't maniuplate @vaddr or @phdr and __per_cpu_load and
  459. * __per_cpu_start will be identical.
  460. *
  461. * This macro is equivalent to ALIGN(align); PERCPU_VADDR( , ) except
  462. * that __per_cpu_load is defined as a relative symbol against
  463. * .data.percpu which is required for relocatable x86_32
  464. * configuration.
  465. */
  466. #define PERCPU(align) \
  467. . = ALIGN(align); \
  468. .data.percpu : AT(ADDR(.data.percpu) - LOAD_OFFSET) { \
  469. VMLINUX_SYMBOL(__per_cpu_load) = .; \
  470. VMLINUX_SYMBOL(__per_cpu_start) = .; \
  471. *(.data.percpu.first) \
  472. *(.data.percpu.page_aligned) \
  473. *(.data.percpu) \
  474. *(.data.percpu.shared_aligned) \
  475. VMLINUX_SYMBOL(__per_cpu_end) = .; \
  476. }