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arm
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dl-sysdep.h

dl-sysdep.h 1.7 KB
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  1. /* vi: set sw=4 ts=4: */
    2. 

  2. /*
    3. 

  3.  * Various assmbly language/system dependent  hacks that are required
    4. 

  4.  * so that we can minimize the amount of platform specific code.
    5. 

  5.  * Copyright (C) 2000-2004 by Erik Andersen <andersen@codepoet.org>
    6. 

  6.  */
    7. 

  7. 

  8. /* Define this if the system uses RELOCA.  */
    9. 

  9. #undef ELF_USES_RELOCA
    10. 

  10. 

  11. /* Initialization sequence for the GOT.  */
    12. 

  12. #define INIT_GOT(GOT_BASE,MODULE) \
    13. 

  13. {				\
    14. 

  14.   GOT_BASE[2] = (unsigned long) _dl_linux_resolve; \
    15. 

  15.   GOT_BASE[1] = (unsigned long) MODULE; \
    16. 

  16. }
    17. 

  17. 

  18. static inline unsigned long arm_modulus(unsigned long m, unsigned long p)
    19. 

  19. {
    20. 

  20. 	unsigned long i,t,inc;
    21. 

  21. 	i=p; t=0;
    22. 

  22. 	while(!(i&(1<<31))) {
    23. 

  23. 		i<<=1;
    24. 

  24. 		t++;
    25. 

  25. 	}
    26. 

  26. 	t--;
    27. 

  27. 	for(inc=t;inc>2;inc--) {
    28. 

  28. 		i=p<<inc;
    29. 

  29. 		if(i&(1<<31))
    30. 

  30. 			break;
    31. 

  31. 		while(m>=i) {
    32. 

  32. 			m-=i;
    33. 

  33. 			i<<=1;
    34. 

  34. 			if(i&(1<<31))
    35. 

  35. 				break;
    36. 

  36. 			if(i<p)
    37. 

  37. 				break;
    38. 

  38. 		}
    39. 

  39. 	}
    40. 

  40. 	while(m>=p) {
    41. 

  41. 		m-=p;
    42. 

  42. 	}
    43. 

  43. 	return m;
    44. 

  44. }
    45. 

  45. #define do_rem(result, n, base) ((result) = arm_modulus(n, base))
    46. 

  46. 

  47. /* Here we define the magic numbers that this dynamic loader should accept */
    48. 

  48. #define MAGIC1 EM_ARM
    49. 

  49. #undef  MAGIC2
    50. 

  50. 

  51. /* Used for error messages */
    52. 

  52. #define ELF_TARGET "ARM"
    53. 

  53. 

  54. struct elf_resolve;
    55. 

  55. unsigned long _dl_linux_resolver(struct elf_resolve * tpnt, int reloc_entry);
    56. 

  56. 

  57. /* 4096 bytes alignment */
    58. 

  58. #define PAGE_ALIGN 0xfffff000
    59. 

  59. #define ADDR_ALIGN 0xfff
    60. 

  60. #define OFFS_ALIGN 0x7ffff000
    61. 

  61. 

  62. /* ELF_RTYPE_CLASS_PLT iff TYPE describes relocation of a PLT entry, so
    63. 

  63.    PLT entries should not be allowed to define the value.
    64. 

  64.    ELF_RTYPE_CLASS_NOCOPY iff TYPE should not be allowed to resolve to one
    65. 

  65.    of the main executable's symbols, as for a COPY reloc.  */
    66. 

  66. #define elf_machine_type_class(type) \
    67. 

  67.   ((((type) == R_ARM_JUMP_SLOT) * ELF_RTYPE_CLASS_PLT)	\
    68. 

  68.    | (((type) == R_ARM_COPY) * ELF_RTYPE_CLASS_COPY))
    69.