/arch/xtensa/include/asm/elf.h

http://github.com/mirrors/linux · C Header · 180 lines · 99 code · 30 blank · 51 comment · 4 complexity · 63b4dadaaedaf48eb14dd531cadf4c45 MD5 · raw file

  1. /*
  2. * include/asm-xtensa/elf.h
  3. *
  4. * ELF register definitions
  5. *
  6. * This file is subject to the terms and conditions of the GNU General Public
  7. * License. See the file "COPYING" in the main directory of this archive
  8. * for more details.
  9. *
  10. * Copyright (C) 2001 - 2005 Tensilica Inc.
  11. */
  12. #ifndef _XTENSA_ELF_H
  13. #define _XTENSA_ELF_H
  14. #include <asm/ptrace.h>
  15. #include <asm/coprocessor.h>
  16. #include <linux/elf-em.h>
  17. /* Xtensa processor ELF architecture-magic number */
  18. #define EM_XTENSA_OLD 0xABC7
  19. /* Xtensa relocations defined by the ABIs */
  20. #define R_XTENSA_NONE 0
  21. #define R_XTENSA_32 1
  22. #define R_XTENSA_RTLD 2
  23. #define R_XTENSA_GLOB_DAT 3
  24. #define R_XTENSA_JMP_SLOT 4
  25. #define R_XTENSA_RELATIVE 5
  26. #define R_XTENSA_PLT 6
  27. #define R_XTENSA_OP0 8
  28. #define R_XTENSA_OP1 9
  29. #define R_XTENSA_OP2 10
  30. #define R_XTENSA_ASM_EXPAND 11
  31. #define R_XTENSA_ASM_SIMPLIFY 12
  32. #define R_XTENSA_GNU_VTINHERIT 15
  33. #define R_XTENSA_GNU_VTENTRY 16
  34. #define R_XTENSA_DIFF8 17
  35. #define R_XTENSA_DIFF16 18
  36. #define R_XTENSA_DIFF32 19
  37. #define R_XTENSA_SLOT0_OP 20
  38. #define R_XTENSA_SLOT1_OP 21
  39. #define R_XTENSA_SLOT2_OP 22
  40. #define R_XTENSA_SLOT3_OP 23
  41. #define R_XTENSA_SLOT4_OP 24
  42. #define R_XTENSA_SLOT5_OP 25
  43. #define R_XTENSA_SLOT6_OP 26
  44. #define R_XTENSA_SLOT7_OP 27
  45. #define R_XTENSA_SLOT8_OP 28
  46. #define R_XTENSA_SLOT9_OP 29
  47. #define R_XTENSA_SLOT10_OP 30
  48. #define R_XTENSA_SLOT11_OP 31
  49. #define R_XTENSA_SLOT12_OP 32
  50. #define R_XTENSA_SLOT13_OP 33
  51. #define R_XTENSA_SLOT14_OP 34
  52. #define R_XTENSA_SLOT0_ALT 35
  53. #define R_XTENSA_SLOT1_ALT 36
  54. #define R_XTENSA_SLOT2_ALT 37
  55. #define R_XTENSA_SLOT3_ALT 38
  56. #define R_XTENSA_SLOT4_ALT 39
  57. #define R_XTENSA_SLOT5_ALT 40
  58. #define R_XTENSA_SLOT6_ALT 41
  59. #define R_XTENSA_SLOT7_ALT 42
  60. #define R_XTENSA_SLOT8_ALT 43
  61. #define R_XTENSA_SLOT9_ALT 44
  62. #define R_XTENSA_SLOT10_ALT 45
  63. #define R_XTENSA_SLOT11_ALT 46
  64. #define R_XTENSA_SLOT12_ALT 47
  65. #define R_XTENSA_SLOT13_ALT 48
  66. #define R_XTENSA_SLOT14_ALT 49
  67. /* ELF register definitions. This is needed for core dump support. */
  68. typedef unsigned long elf_greg_t;
  69. typedef struct user_pt_regs xtensa_gregset_t;
  70. #define ELF_NGREG (sizeof(xtensa_gregset_t) / sizeof(elf_greg_t))
  71. typedef elf_greg_t elf_gregset_t[ELF_NGREG];
  72. #define ELF_NFPREG 18
  73. typedef unsigned int elf_fpreg_t;
  74. typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
  75. /*
  76. * This is used to ensure we don't load something for the wrong architecture.
  77. */
  78. #define elf_check_arch(x) ( ( (x)->e_machine == EM_XTENSA ) || \
  79. ( (x)->e_machine == EM_XTENSA_OLD ) )
  80. /*
  81. * These are used to set parameters in the core dumps.
  82. */
  83. #ifdef __XTENSA_EL__
  84. # define ELF_DATA ELFDATA2LSB
  85. #elif defined(__XTENSA_EB__)
  86. # define ELF_DATA ELFDATA2MSB
  87. #else
  88. # error processor byte order undefined!
  89. #endif
  90. #define ELF_CLASS ELFCLASS32
  91. #define ELF_ARCH EM_XTENSA
  92. #define ELF_EXEC_PAGESIZE PAGE_SIZE
  93. #define CORE_DUMP_USE_REGSET
  94. /*
  95. * This is the location that an ET_DYN program is loaded if exec'ed. Typical
  96. * use of this is to invoke "./ld.so someprog" to test out a new version of
  97. * the loader. We need to make sure that it is out of the way of the program
  98. * that it will "exec", and that there is sufficient room for the brk.
  99. */
  100. #define ELF_ET_DYN_BASE (2 * TASK_SIZE / 3)
  101. /*
  102. * This yields a mask that user programs can use to figure out what
  103. * instruction set this CPU supports. This could be done in user space,
  104. * but it's not easy, and we've already done it here.
  105. */
  106. #define ELF_HWCAP (0)
  107. /*
  108. * This yields a string that ld.so will use to load implementation
  109. * specific libraries for optimization. This is more specific in
  110. * intent than poking at uname or /proc/cpuinfo.
  111. * For the moment, we have only optimizations for the Intel generations,
  112. * but that could change...
  113. */
  114. #define ELF_PLATFORM (NULL)
  115. /*
  116. * The Xtensa processor ABI says that when the program starts, a2
  117. * contains a pointer to a function which might be registered using
  118. * `atexit'. This provides a mean for the dynamic linker to call
  119. * DT_FINI functions for shared libraries that have been loaded before
  120. * the code runs.
  121. *
  122. * A value of 0 tells we have no such handler.
  123. *
  124. * We might as well make sure everything else is cleared too (except
  125. * for the stack pointer in a1), just to make things more
  126. * deterministic. Also, clearing a0 terminates debugger backtraces.
  127. */
  128. #define ELF_PLAT_INIT(_r, load_addr) \
  129. do { _r->areg[0]=0; /*_r->areg[1]=0;*/ _r->areg[2]=0; _r->areg[3]=0; \
  130. _r->areg[4]=0; _r->areg[5]=0; _r->areg[6]=0; _r->areg[7]=0; \
  131. _r->areg[8]=0; _r->areg[9]=0; _r->areg[10]=0; _r->areg[11]=0; \
  132. _r->areg[12]=0; _r->areg[13]=0; _r->areg[14]=0; _r->areg[15]=0; \
  133. } while (0)
  134. typedef struct {
  135. xtregs_opt_t opt;
  136. xtregs_user_t user;
  137. #if XTENSA_HAVE_COPROCESSORS
  138. xtregs_cp0_t cp0;
  139. xtregs_cp1_t cp1;
  140. xtregs_cp2_t cp2;
  141. xtregs_cp3_t cp3;
  142. xtregs_cp4_t cp4;
  143. xtregs_cp5_t cp5;
  144. xtregs_cp6_t cp6;
  145. xtregs_cp7_t cp7;
  146. #endif
  147. } elf_xtregs_t;
  148. #define SET_PERSONALITY(ex) \
  149. set_personality(PER_LINUX_32BIT | (current->personality & (~PER_MASK)))
  150. #endif /* _XTENSA_ELF_H */