vmlinux.lds.S 5.3 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261
  1. #ifdef CONFIG_PPC64
  2. #define PROVIDE32(x) PROVIDE(__unused__##x)
  3. #else
  4. #define PROVIDE32(x) PROVIDE(x)
  5. #endif
  6. #include <asm/page.h>
  7. #include <asm-generic/vmlinux.lds.h>
  8. #include <asm/cache.h>
  9. #include <asm/thread_info.h>
  10. ENTRY(_stext)
  11. PHDRS {
  12. kernel PT_LOAD FLAGS(7); /* RWX */
  13. notes PT_NOTE FLAGS(0);
  14. dummy PT_NOTE FLAGS(0);
  15. /* binutils < 2.18 has a bug that makes it misbehave when taking an
  16. ELF file with all segments at load address 0 as input. This
  17. happens when running "strip" on vmlinux, because of the AT() magic
  18. in this linker script. People using GCC >= 4.2 won't run into
  19. this problem, because the "build-id" support will put some data
  20. into the "notes" segment (at a non-zero load address).
  21. To work around this, we force some data into both the "dummy"
  22. segment and the kernel segment, so the dummy segment will get a
  23. non-zero load address. It's not enough to always create the
  24. "notes" segment, since if nothing gets assigned to it, its load
  25. address will be zero. */
  26. }
  27. #ifdef CONFIG_PPC64
  28. OUTPUT_ARCH(powerpc:common64)
  29. jiffies = jiffies_64;
  30. #else
  31. OUTPUT_ARCH(powerpc:common)
  32. jiffies = jiffies_64 + 4;
  33. #endif
  34. SECTIONS
  35. {
  36. . = KERNELBASE;
  37. /*
  38. * Text, read only data and other permanent read-only sections
  39. */
  40. /* Text and gots */
  41. .text : AT(ADDR(.text) - LOAD_OFFSET) {
  42. ALIGN_FUNCTION();
  43. HEAD_TEXT
  44. _text = .;
  45. /* careful! __ftr_alt_* sections need to be close to .text */
  46. *(.text .fixup __ftr_alt_* .ref.text)
  47. SCHED_TEXT
  48. LOCK_TEXT
  49. KPROBES_TEXT
  50. IRQENTRY_TEXT
  51. #ifdef CONFIG_PPC32
  52. *(.got1)
  53. __got2_start = .;
  54. *(.got2)
  55. __got2_end = .;
  56. #endif /* CONFIG_PPC32 */
  57. } :kernel
  58. . = ALIGN(PAGE_SIZE);
  59. _etext = .;
  60. PROVIDE32 (etext = .);
  61. /* Read-only data */
  62. RODATA
  63. EXCEPTION_TABLE(0)
  64. NOTES :kernel :notes
  65. /* The dummy segment contents for the bug workaround mentioned above
  66. near PHDRS. */
  67. .dummy : AT(ADDR(.dummy) - LOAD_OFFSET) {
  68. LONG(0)
  69. LONG(0)
  70. LONG(0)
  71. } :kernel :dummy
  72. /*
  73. * Init sections discarded at runtime
  74. */
  75. . = ALIGN(PAGE_SIZE);
  76. __init_begin = .;
  77. INIT_TEXT_SECTION(PAGE_SIZE) :kernel
  78. /* .exit.text is discarded at runtime, not link time,
  79. * to deal with references from __bug_table
  80. */
  81. .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) {
  82. EXIT_TEXT
  83. }
  84. .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {
  85. INIT_DATA
  86. __vtop_table_begin = .;
  87. *(.vtop_fixup);
  88. __vtop_table_end = .;
  89. __ptov_table_begin = .;
  90. *(.ptov_fixup);
  91. __ptov_table_end = .;
  92. }
  93. .init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) {
  94. INIT_SETUP(16)
  95. }
  96. .initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) {
  97. INIT_CALLS
  98. }
  99. .con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
  100. CON_INITCALL
  101. }
  102. SECURITY_INIT
  103. . = ALIGN(8);
  104. __ftr_fixup : AT(ADDR(__ftr_fixup) - LOAD_OFFSET) {
  105. __start___ftr_fixup = .;
  106. *(__ftr_fixup)
  107. __stop___ftr_fixup = .;
  108. }
  109. . = ALIGN(8);
  110. __mmu_ftr_fixup : AT(ADDR(__mmu_ftr_fixup) - LOAD_OFFSET) {
  111. __start___mmu_ftr_fixup = .;
  112. *(__mmu_ftr_fixup)
  113. __stop___mmu_ftr_fixup = .;
  114. }
  115. . = ALIGN(8);
  116. __lwsync_fixup : AT(ADDR(__lwsync_fixup) - LOAD_OFFSET) {
  117. __start___lwsync_fixup = .;
  118. *(__lwsync_fixup)
  119. __stop___lwsync_fixup = .;
  120. }
  121. #ifdef CONFIG_PPC64
  122. . = ALIGN(8);
  123. __fw_ftr_fixup : AT(ADDR(__fw_ftr_fixup) - LOAD_OFFSET) {
  124. __start___fw_ftr_fixup = .;
  125. *(__fw_ftr_fixup)
  126. __stop___fw_ftr_fixup = .;
  127. }
  128. #endif
  129. .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) {
  130. INIT_RAM_FS
  131. }
  132. PERCPU_SECTION(L1_CACHE_BYTES)
  133. . = ALIGN(8);
  134. .machine.desc : AT(ADDR(.machine.desc) - LOAD_OFFSET) {
  135. __machine_desc_start = . ;
  136. *(.machine.desc)
  137. __machine_desc_end = . ;
  138. }
  139. #ifdef CONFIG_RELOCATABLE
  140. . = ALIGN(8);
  141. .dynsym : AT(ADDR(.dynsym) - LOAD_OFFSET)
  142. {
  143. #ifdef CONFIG_RELOCATABLE_PPC32
  144. __dynamic_symtab = .;
  145. #endif
  146. *(.dynsym)
  147. }
  148. .dynstr : AT(ADDR(.dynstr) - LOAD_OFFSET) { *(.dynstr) }
  149. .dynamic : AT(ADDR(.dynamic) - LOAD_OFFSET)
  150. {
  151. __dynamic_start = .;
  152. *(.dynamic)
  153. }
  154. .hash : AT(ADDR(.hash) - LOAD_OFFSET) { *(.hash) }
  155. .interp : AT(ADDR(.interp) - LOAD_OFFSET) { *(.interp) }
  156. .rela.dyn : AT(ADDR(.rela.dyn) - LOAD_OFFSET)
  157. {
  158. __rela_dyn_start = .;
  159. *(.rela*)
  160. }
  161. #endif
  162. /* freed after init ends here */
  163. . = ALIGN(PAGE_SIZE);
  164. __init_end = .;
  165. /*
  166. * And now the various read/write data
  167. */
  168. . = ALIGN(PAGE_SIZE);
  169. _sdata = .;
  170. #ifdef CONFIG_PPC32
  171. .data : AT(ADDR(.data) - LOAD_OFFSET) {
  172. DATA_DATA
  173. *(.sdata)
  174. *(.got.plt) *(.got)
  175. }
  176. #else
  177. .data : AT(ADDR(.data) - LOAD_OFFSET) {
  178. DATA_DATA
  179. *(.data.rel*)
  180. *(.toc1)
  181. *(.branch_lt)
  182. }
  183. .opd : AT(ADDR(.opd) - LOAD_OFFSET) {
  184. *(.opd)
  185. }
  186. . = ALIGN(256);
  187. .got : AT(ADDR(.got) - LOAD_OFFSET) {
  188. __toc_start = .;
  189. *(.got)
  190. *(.toc)
  191. }
  192. #endif
  193. /* The initial task and kernel stack */
  194. INIT_TASK_DATA_SECTION(THREAD_SIZE)
  195. .data..page_aligned : AT(ADDR(.data..page_aligned) - LOAD_OFFSET) {
  196. PAGE_ALIGNED_DATA(PAGE_SIZE)
  197. }
  198. .data..cacheline_aligned : AT(ADDR(.data..cacheline_aligned) - LOAD_OFFSET) {
  199. CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES)
  200. }
  201. .data..read_mostly : AT(ADDR(.data..read_mostly) - LOAD_OFFSET) {
  202. READ_MOSTLY_DATA(L1_CACHE_BYTES)
  203. }
  204. . = ALIGN(PAGE_SIZE);
  205. .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) {
  206. NOSAVE_DATA
  207. }
  208. . = ALIGN(PAGE_SIZE);
  209. _edata = .;
  210. PROVIDE32 (edata = .);
  211. /*
  212. * And finally the bss
  213. */
  214. BSS_SECTION(0, 0, 0)
  215. . = ALIGN(PAGE_SIZE);
  216. _end = . ;
  217. PROVIDE32 (end = .);
  218. /* Sections to be discarded. */
  219. DISCARDS
  220. }