/arch/arm/kernel/asm-offsets.c

https://bitbucket.org/evzijst/gittest · C · 83 lines · 54 code · 5 blank · 24 comment · 13 complexity · f2b7045b50902e47097bd4766dc643be MD5 · raw file

  1. /*
  2. * Copyright (C) 1995-2003 Russell King
  3. * 2001-2002 Keith Owens
  4. *
  5. * Generate definitions needed by assembly language modules.
  6. * This code generates raw asm output which is post-processed to extract
  7. * and format the required data.
  8. *
  9. * This program is free software; you can redistribute it and/or modify
  10. * it under the terms of the GNU General Public License version 2 as
  11. * published by the Free Software Foundation.
  12. */
  13. #include <linux/sched.h>
  14. #include <linux/mm.h>
  15. #include <asm/mach/arch.h>
  16. #include <asm/thread_info.h>
  17. #include <asm/memory.h>
  18. /*
  19. * Make sure that the compiler and target are compatible.
  20. */
  21. #if defined(__APCS_26__)
  22. #error Sorry, your compiler targets APCS-26 but this kernel requires APCS-32
  23. #endif
  24. /*
  25. * GCC 2.95.1, 2.95.2: ignores register clobber list in asm().
  26. * GCC 3.0, 3.1: general bad code generation.
  27. * GCC 3.2.0: incorrect function argument offset calculation.
  28. * GCC 3.2.x: miscompiles NEW_AUX_ENT in fs/binfmt_elf.c
  29. * (http://gcc.gnu.org/PR8896) and incorrect structure
  30. * initialisation in fs/jffs2/erase.c
  31. */
  32. #if __GNUC__ < 2 || \
  33. (__GNUC__ == 2 && __GNUC_MINOR__ < 95) || \
  34. (__GNUC__ == 2 && __GNUC_MINOR__ == 95 && __GNUC_PATCHLEVEL__ != 0 && \
  35. __GNUC_PATCHLEVEL__ < 3) || \
  36. (__GNUC__ == 3 && __GNUC_MINOR__ < 3)
  37. #error Your compiler is too buggy; it is known to miscompile kernels.
  38. #error Known good compilers: 2.95.3, 2.95.4, 2.96, 3.3
  39. #endif
  40. /* Use marker if you need to separate the values later */
  41. #define DEFINE(sym, val) \
  42. asm volatile("\n->" #sym " %0 " #val : : "i" (val))
  43. #define BLANK() asm volatile("\n->" : : )
  44. int main(void)
  45. {
  46. DEFINE(TSK_ACTIVE_MM, offsetof(struct task_struct, active_mm));
  47. BLANK();
  48. DEFINE(TI_FLAGS, offsetof(struct thread_info, flags));
  49. DEFINE(TI_PREEMPT, offsetof(struct thread_info, preempt_count));
  50. DEFINE(TI_ADDR_LIMIT, offsetof(struct thread_info, addr_limit));
  51. DEFINE(TI_TASK, offsetof(struct thread_info, task));
  52. DEFINE(TI_EXEC_DOMAIN, offsetof(struct thread_info, exec_domain));
  53. DEFINE(TI_CPU, offsetof(struct thread_info, cpu));
  54. DEFINE(TI_CPU_DOMAIN, offsetof(struct thread_info, cpu_domain));
  55. DEFINE(TI_CPU_SAVE, offsetof(struct thread_info, cpu_context));
  56. DEFINE(TI_USED_CP, offsetof(struct thread_info, used_cp));
  57. DEFINE(TI_TP_VALUE, offsetof(struct thread_info, tp_value));
  58. DEFINE(TI_FPSTATE, offsetof(struct thread_info, fpstate));
  59. DEFINE(TI_VFPSTATE, offsetof(struct thread_info, vfpstate));
  60. DEFINE(TI_IWMMXT_STATE, (offsetof(struct thread_info, fpstate)+4)&~7);
  61. BLANK();
  62. #if __LINUX_ARM_ARCH__ >= 6
  63. DEFINE(MM_CONTEXT_ID, offsetof(struct mm_struct, context.id));
  64. BLANK();
  65. #endif
  66. DEFINE(VMA_VM_MM, offsetof(struct vm_area_struct, vm_mm));
  67. DEFINE(VMA_VM_FLAGS, offsetof(struct vm_area_struct, vm_flags));
  68. BLANK();
  69. DEFINE(VM_EXEC, VM_EXEC);
  70. BLANK();
  71. DEFINE(PAGE_SZ, PAGE_SIZE);
  72. DEFINE(VIRT_OFFSET, PAGE_OFFSET);
  73. BLANK();
  74. DEFINE(SYS_ERROR0, 0x9f0000);
  75. BLANK();
  76. DEFINE(SIZEOF_MACHINE_DESC, sizeof(struct machine_desc));
  77. return 0;
  78. }