elf.h 3.8 KB

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  1. #ifndef __ASMARM_ELF_H
  2. #define __ASMARM_ELF_H
  3. #ifndef __ASSEMBLY__
  4. /*
  5. * ELF register definitions..
  6. */
  7. #include <asm/ptrace.h>
  8. #include <asm/user.h>
  9. typedef unsigned long elf_greg_t;
  10. typedef unsigned long elf_freg_t[3];
  11. #define ELF_NGREG (sizeof (struct pt_regs) / sizeof(elf_greg_t))
  12. typedef elf_greg_t elf_gregset_t[ELF_NGREG];
  13. typedef struct user_fp elf_fpregset_t;
  14. #endif
  15. #define EM_ARM 40
  16. #define EF_ARM_APCS26 0x08
  17. #define EF_ARM_SOFT_FLOAT 0x200
  18. #define EF_ARM_EABI_MASK 0xFF000000
  19. #define R_ARM_NONE 0
  20. #define R_ARM_PC24 1
  21. #define R_ARM_ABS32 2
  22. #define R_ARM_CALL 28
  23. #define R_ARM_JUMP24 29
  24. /*
  25. * These are used to set parameters in the core dumps.
  26. */
  27. #define ELF_CLASS ELFCLASS32
  28. #ifdef __ARMEB__
  29. #define ELF_DATA ELFDATA2MSB
  30. #else
  31. #define ELF_DATA ELFDATA2LSB
  32. #endif
  33. #define ELF_ARCH EM_ARM
  34. /*
  35. * HWCAP flags - for elf_hwcap (in kernel) and AT_HWCAP
  36. */
  37. #define HWCAP_SWP 1
  38. #define HWCAP_HALF 2
  39. #define HWCAP_THUMB 4
  40. #define HWCAP_26BIT 8 /* Play it safe */
  41. #define HWCAP_FAST_MULT 16
  42. #define HWCAP_FPA 32
  43. #define HWCAP_VFP 64
  44. #define HWCAP_EDSP 128
  45. #define HWCAP_JAVA 256
  46. #define HWCAP_IWMMXT 512
  47. #define HWCAP_CRUNCH 1024
  48. #ifdef __KERNEL__
  49. #ifndef __ASSEMBLY__
  50. /*
  51. * This yields a mask that user programs can use to figure out what
  52. * instruction set this cpu supports.
  53. */
  54. #define ELF_HWCAP (elf_hwcap)
  55. extern unsigned int elf_hwcap;
  56. /*
  57. * This yields a string that ld.so will use to load implementation
  58. * specific libraries for optimization. This is more specific in
  59. * intent than poking at uname or /proc/cpuinfo.
  60. *
  61. * For now we just provide a fairly general string that describes the
  62. * processor family. This could be made more specific later if someone
  63. * implemented optimisations that require it. 26-bit CPUs give you
  64. * "v1l" for ARM2 (no SWP) and "v2l" for anything else (ARM1 isn't
  65. * supported). 32-bit CPUs give you "v3[lb]" for anything based on an
  66. * ARM6 or ARM7 core and "armv4[lb]" for anything based on a StrongARM-1
  67. * core.
  68. */
  69. #define ELF_PLATFORM_SIZE 8
  70. #define ELF_PLATFORM (elf_platform)
  71. extern char elf_platform[];
  72. #endif
  73. /*
  74. * This is used to ensure we don't load something for the wrong architecture.
  75. */
  76. #define elf_check_arch(x) ((x)->e_machine == EM_ARM && ELF_PROC_OK(x))
  77. /*
  78. * 32-bit code is always OK. Some cpus can do 26-bit, some can't.
  79. */
  80. #define ELF_PROC_OK(x) (ELF_THUMB_OK(x) && ELF_26BIT_OK(x))
  81. #define ELF_THUMB_OK(x) \
  82. ((elf_hwcap & HWCAP_THUMB && ((x)->e_entry & 1) == 1) || \
  83. ((x)->e_entry & 3) == 0)
  84. #define ELF_26BIT_OK(x) \
  85. ((elf_hwcap & HWCAP_26BIT && (x)->e_flags & EF_ARM_APCS26) || \
  86. ((x)->e_flags & EF_ARM_APCS26) == 0)
  87. #define USE_ELF_CORE_DUMP
  88. #define ELF_EXEC_PAGESIZE 4096
  89. /* This is the location that an ET_DYN program is loaded if exec'ed. Typical
  90. use of this is to invoke "./ld.so someprog" to test out a new version of
  91. the loader. We need to make sure that it is out of the way of the program
  92. that it will "exec", and that there is sufficient room for the brk. */
  93. #define ELF_ET_DYN_BASE (2 * TASK_SIZE / 3)
  94. /* When the program starts, a1 contains a pointer to a function to be
  95. registered with atexit, as per the SVR4 ABI. A value of 0 means we
  96. have no such handler. */
  97. #define ELF_PLAT_INIT(_r, load_addr) (_r)->ARM_r0 = 0
  98. /*
  99. * Since the FPA coprocessor uses CP1 and CP2, and iWMMXt uses CP0
  100. * and CP1, we only enable access to the iWMMXt coprocessor if the
  101. * binary is EABI or softfloat (and thus, guaranteed not to use
  102. * FPA instructions.)
  103. */
  104. #define SET_PERSONALITY(ex, ibcs2) \
  105. do { \
  106. if ((ex).e_flags & EF_ARM_APCS26) { \
  107. set_personality(PER_LINUX); \
  108. } else { \
  109. set_personality(PER_LINUX_32BIT); \
  110. if (elf_hwcap & HWCAP_IWMMXT && (ex).e_flags & (EF_ARM_EABI_MASK | EF_ARM_SOFT_FLOAT)) \
  111. set_thread_flag(TIF_USING_IWMMXT); \
  112. else \
  113. clear_thread_flag(TIF_USING_IWMMXT); \
  114. } \
  115. } while (0)
  116. #endif
  117. #endif