ldso.h 4.8 KB

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  1. /* vi: set sw=4 ts=4: */
  2. /*
  3. * Copyright (C) 2000-2005 by Erik Andersen <andersen@codepoet.org>
  4. *
  5. * GNU Lesser General Public License version 2.1 or later.
  6. */
  7. #ifndef _LDSO_H_
  8. #define _LDSO_H_
  9. #include <features.h>
  10. /* Prepare for the case that `__builtin_expect' is not available. */
  11. #if defined __GNUC__ && __GNUC__ == 2 && __GNUC_MINOR__ < 96
  12. #define __builtin_expect(x, expected_value) (x)
  13. #endif
  14. #ifndef likely
  15. # define likely(x) __builtin_expect((!!(x)),1)
  16. #endif
  17. #ifndef unlikely
  18. # define unlikely(x) __builtin_expect((!!(x)),0)
  19. #endif
  20. #ifndef __LINUX_COMPILER_H
  21. #define __LINUX_COMPILER_H
  22. #endif
  23. /* Pull in compiler and arch stuff */
  24. #include <stdlib.h>
  25. #include <stdarg.h>
  26. #include <stddef.h> /* for ptrdiff_t */
  27. #include <stdbool.h>
  28. #define _FCNTL_H
  29. #include <bits/fcntl.h>
  30. #include <bits/wordsize.h>
  31. /* Pull in the arch specific type information */
  32. #include <sys/types.h>
  33. /* Pull in the arch specific page size */
  34. #include <bits/uClibc_page.h>
  35. /* Pull in the MIN macro */
  36. #include <sys/param.h>
  37. /* Pull in the ldso syscalls and string functions */
  38. #ifndef __ARCH_HAS_NO_SHARED__
  39. #include <dl-syscall.h>
  40. #include <dl-string.h>
  41. #include <dlfcn.h>
  42. /* Now the ldso specific headers */
  43. #include <dl-elf.h>
  44. #ifdef __UCLIBC_HAS_TLS__
  45. /* Defines USE_TLS */
  46. #include <tls.h>
  47. #endif
  48. #include <dl-hash.h>
  49. /* common align masks, if not specified by sysdep headers */
  50. #ifndef ADDR_ALIGN
  51. #define ADDR_ALIGN (_dl_pagesize - 1)
  52. #endif
  53. #ifndef PAGE_ALIGN
  54. #define PAGE_ALIGN (~ADDR_ALIGN)
  55. #endif
  56. #ifndef OFFS_ALIGN
  57. #define OFFS_ALIGN (PAGE_ALIGN & ~(1ul << (sizeof(_dl_pagesize) * 8 - 1)))
  58. #endif
  59. /* For INIT/FINI dependency sorting. */
  60. struct init_fini_list {
  61. struct init_fini_list *next;
  62. struct elf_resolve *tpnt;
  63. };
  64. /* Global variables used within the shared library loader */
  65. extern char *_dl_library_path; /* Where we look for libraries */
  66. extern char *_dl_preload; /* Things to be loaded before the libs */
  67. extern char *_dl_ldsopath; /* Where the shared lib loader was found */
  68. extern const char *_dl_progname; /* The name of the executable being run */
  69. extern size_t _dl_pagesize; /* Store the page size for use later */
  70. #ifdef __LDSO_PRELINK_SUPPORT__
  71. extern char *_dl_trace_prelink; /* Library for prelinking trace */
  72. extern struct elf_resolve *_dl_trace_prelink_map; /* Library map for prelinking trace */
  73. #else
  74. #define _dl_trace_prelink 0
  75. #endif
  76. #if defined(USE_TLS) && USE_TLS
  77. extern void _dl_add_to_slotinfo (struct link_map *l);
  78. extern void ** __attribute__ ((const)) _dl_initial_error_catch_tsd (void);
  79. #endif
  80. #ifdef USE_TLS
  81. void _dl_add_to_slotinfo (struct link_map *l);
  82. void ** __attribute__ ((const)) _dl_initial_error_catch_tsd (void);
  83. #endif
  84. #ifdef __SUPPORT_LD_DEBUG__
  85. extern char *_dl_debug;
  86. extern char *_dl_debug_symbols;
  87. extern char *_dl_debug_move;
  88. extern char *_dl_debug_reloc;
  89. extern char *_dl_debug_detail;
  90. extern char *_dl_debug_nofixups;
  91. extern char *_dl_debug_bindings;
  92. extern int _dl_debug_file;
  93. # define __dl_debug_dprint(fmt, args...) \
  94. _dl_dprintf(_dl_debug_file, "%s:%i: " fmt, __FUNCTION__, __LINE__, ## args);
  95. # define _dl_if_debug_dprint(fmt, args...) \
  96. do { if (_dl_debug) __dl_debug_dprint(fmt, ## args); } while (0)
  97. #else
  98. # define __dl_debug_dprint(fmt, args...) do {} while (0)
  99. # define _dl_if_debug_dprint(fmt, args...) do {} while (0)
  100. # define _dl_debug_file 2
  101. #endif /* __SUPPORT_LD_DEBUG__ */
  102. #ifdef IS_IN_rtld
  103. # ifdef __SUPPORT_LD_DEBUG__
  104. # define _dl_assert(expr) \
  105. do { \
  106. if (!(expr)) { \
  107. __dl_debug_dprint("assert(%s)\n", #expr); \
  108. _dl_exit(45); \
  109. } \
  110. } while (0)
  111. # else
  112. # define _dl_assert(expr) ((void)0)
  113. # endif
  114. #else
  115. # include <assert.h>
  116. # define _dl_assert(expr) assert(expr)
  117. #endif
  118. #ifdef __SUPPORT_LD_DEBUG_EARLY__
  119. # define _dl_debug_early(fmt, args...) __dl_debug_dprint(fmt, ## args)
  120. #else
  121. # define _dl_debug_early(fmt, args...) do {} while (0)
  122. #endif /* __SUPPORT_LD_DEBUG_EARLY__ */
  123. #ifndef NULL
  124. #define NULL ((void *) 0)
  125. #endif
  126. extern void *_dl_malloc(size_t size);
  127. extern void *_dl_calloc(size_t __nmemb, size_t __size);
  128. extern void *_dl_realloc(void *__ptr, size_t __size);
  129. extern void _dl_free(void *);
  130. extern char *_dl_getenv(const char *symbol, char **envp);
  131. extern void _dl_unsetenv(const char *symbol, char **envp);
  132. extern char *_dl_strdup(const char *string);
  133. extern void _dl_dprintf(int, const char *, ...);
  134. #ifndef DL_GET_READY_TO_RUN_EXTRA_PARMS
  135. # define DL_GET_READY_TO_RUN_EXTRA_PARMS
  136. #endif
  137. #ifndef DL_GET_READY_TO_RUN_EXTRA_ARGS
  138. # define DL_GET_READY_TO_RUN_EXTRA_ARGS
  139. #endif
  140. extern void *_dl_get_ready_to_run(struct elf_resolve *tpnt, DL_LOADADDR_TYPE load_addr,
  141. ElfW(auxv_t) auxvt[AT_EGID + 1], char **envp, char **argv
  142. DL_GET_READY_TO_RUN_EXTRA_PARMS);
  143. #ifdef HAVE_DL_INLINES_H
  144. #include <dl-inlines.h>
  145. #endif
  146. #else /* __ARCH_HAS_NO_SHARED__ */
  147. #include <dl-defs.h>
  148. #endif
  149. #endif /* _LDSO_H_ */