release/src-rt-6.x.4708/toolchains/hndtools-arm-linux-2.6.36-uclibc-4.5.3/arm-brcm-linux-uclibcgnueabi/sysroot/usr/include/dlfcn.h

   1 /* User functions for run-time dynamic loading.
   2    Copyright (C) 1995-1999,2000,2001,2003,2004,2006
   3         Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #ifndef _DLFCN_H
  22 #define _DLFCN_H 1
  23
  24 #include <features.h>
  25 #define __need_size_t
  26 #include <stddef.h>
  27
  28 /* Collect various system dependent definitions and declarations.  */
  29 #include <bits/dlfcn.h>
  30
  31
  32 #ifdef __USE_GNU
  33 /* If the first argument of `dlsym' or `dlvsym' is set to RTLD_NEXT
  34    the run-time address of the symbol called NAME in the next shared
  35    object is returned.  The "next" relation is defined by the order
  36    the shared objects were loaded.  */
  37 # define RTLD_NEXT      ((void *) -1l)
  38
  39 /* If the first argument to `dlsym' or `dlvsym' is set to RTLD_DEFAULT
  40    the run-time address of the symbol called NAME in the global scope
  41    is returned.  */
  42 # define RTLD_DEFAULT   ((void *) 0)
  43
  44
  45 # if 0 /* uClibc doesnt support this */
  46 /* Type for namespace indeces.  */
  47 typedef long int Lmid_t;
  48
  49 /* Special namespace ID values.  */
  50 # define LM_ID_BASE     0       /* Initial namespace.  */
  51 # define LM_ID_NEWLM    -1      /* For dlmopen: request new namespace.  */
  52 # endif
  53 #endif
  54
  55 __BEGIN_DECLS
  56
  57 /* Open the shared object FILE and map it in; return a handle that can be
  58    passed to `dlsym' to get symbol values from it.  */
  59 extern void *dlopen (__const char *__file, int __mode) __THROW;
  60
  61 /* Unmap and close a shared object opened by `dlopen'.
  62    The handle cannot be used again after calling `dlclose'.  */
  63 extern int dlclose (void *__handle) __THROW __nonnull ((1));
  64
  65 /* Find the run-time address in the shared object HANDLE refers to
  66    of the symbol called NAME.  */
  67 extern void *dlsym (void *__restrict __handle,
  68                     __const char *__restrict __name) __THROW __nonnull ((2));
  69
  70 #if 0 /*def __USE_GNU*/
  71 /* Like `dlopen', but request object to be allocated in a new namespace.  */
  72 extern void *dlmopen (Lmid_t __nsid, __const char *__file, int __mode) __THROW;
  73
  74 /* Find the run-time address in the shared object HANDLE refers to
  75    of the symbol called NAME with VERSION.  */
  76 extern void *dlvsym (void *__restrict __handle,
  77                      __const char *__restrict __name,
  78                      __const char *__restrict __version)
  79      __THROW __nonnull ((2, 3));
  80 #endif
  81
  82 /* When any of the above functions fails, call this function
  83    to return a string describing the error.  Each call resets
  84    the error string so that a following call returns null.  */
  85 extern char *dlerror (void) __THROW;
  86
  87
  88 #ifdef __USE_GNU
  89 /* Structure containing information about object searched using
  90    `dladdr'.  */
  91 typedef struct
  92 {
  93   __const char *dli_fname;      /* File name of defining object.  */
  94   void *dli_fbase;              /* Load address of that object.  */
  95   __const char *dli_sname;      /* Name of nearest symbol.  */
  96   void *dli_saddr;              /* Exact value of nearest symbol.  */
  97 } Dl_info;
  98
  99 /* Fill in *INFO with the following information about ADDRESS.
 100    Returns 0 iff no shared object's segments contain that address.  */
 101 extern int dladdr (__const void *__address, Dl_info *__info)
 102      __THROW __nonnull ((2));
 103
 104 #if 0 /* not supported by uClibc */
 105 /* Same as `dladdr', but additionally sets *EXTRA_INFO according to FLAGS.  */
 106 extern int dladdr1 (__const void *__address, Dl_info *__info,
 107                     void **__extra_info, int __flags) __THROW __nonnull ((2));
 108
 109 /* These are the possible values for the FLAGS argument to `dladdr1'.
 110    This indicates what extra information is stored at *EXTRA_INFO.
 111    It may also be zero, in which case the EXTRA_INFO argument is not used.  */
 112 enum
 113   {
 114     /* Matching symbol table entry (const ElfNN_Sym *).  */
 115     RTLD_DL_SYMENT = 1,
 116
 117     /* The object containing the address (struct link_map *).  */
 118     RTLD_DL_LINKMAP = 2
 119   };
 120
 121
 122 /* Get information about the shared object HANDLE refers to.
 123    REQUEST is from among the values below, and determines the use of ARG.
 124
 125    On success, returns zero.  On failure, returns -1 and records an error
 126    message to be fetched with `dlerror'.  */
 127 extern int dlinfo (void *__restrict __handle,
 128                    int __request, void *__restrict __arg)
 129      __THROW __nonnull ((1, 3));
 130
 131 /* These are the possible values for the REQUEST argument to `dlinfo'.  */
 132 enum
 133   {
 134     /* Treat ARG as `lmid_t *'; store namespace ID for HANDLE there.  */
 135     RTLD_DI_LMID = 1,
 136
 137     /* Treat ARG as `struct link_map **';
 138        store the `struct link_map *' for HANDLE there.  */
 139     RTLD_DI_LINKMAP = 2,
 140
 141     RTLD_DI_CONFIGADDR = 3,     /* Unsupported, defined by Solaris.  */
 142
 143     /* Treat ARG as `Dl_serinfo *' (see below), and fill in to describe the
 144        directories that will be searched for dependencies of this object.
 145        RTLD_DI_SERINFOSIZE fills in just the `dls_cnt' and `dls_size'
 146        entries to indicate the size of the buffer that must be passed to
 147        RTLD_DI_SERINFO to fill in the full information.  */
 148     RTLD_DI_SERINFO = 4,
 149     RTLD_DI_SERINFOSIZE = 5,
 150
 151     /* Treat ARG as `char *', and store there the directory name used to
 152        expand $ORIGIN in this shared object's dependency file names.  */
 153     RTLD_DI_ORIGIN = 6,
 154
 155     RTLD_DI_PROFILENAME = 7,    /* Unsupported, defined by Solaris.  */
 156     RTLD_DI_PROFILEOUT = 8,     /* Unsupported, defined by Solaris.  */
 157
 158     /* Treat ARG as `size_t *', and store there the TLS module ID
 159        of this object's PT_TLS segment, as used in TLS relocations;
 160        store zero if this object does not define a PT_TLS segment.  */
 161     RTLD_DI_TLS_MODID = 9,
 162
 163     /* Treat ARG as `void **', and store there a pointer to the calling
 164        thread's TLS block corresponding to this object's PT_TLS segment.
 165        Store a null pointer if this object does not define a PT_TLS
 166        segment, or if the calling thread has not allocated a block for it.  */
 167     RTLD_DI_TLS_DATA = 10,
 168
 169     RTLD_DI_MAX = 10,
 170   };
 171
 172
 173 /* This is the type of elements in `Dl_serinfo', below.
 174    The `dls_name' member points to space in the buffer passed to `dlinfo'.  */
 175 typedef struct
 176 {
 177   char *dls_name;               /* Name of library search path directory.  */
 178   unsigned int dls_flags;       /* Indicates where this directory came from. */
 179 } Dl_serpath;
 180
 181 /* This is the structure that must be passed (by reference) to `dlinfo' for
 182    the RTLD_DI_SERINFO and RTLD_DI_SERINFOSIZE requests.  */
 183 typedef struct
 184 {
 185   size_t dls_size;              /* Size in bytes of the whole buffer.  */
 186   unsigned int dls_cnt;         /* Number of elements in `dls_serpath'.  */
 187   Dl_serpath dls_serpath[1];    /* Actually longer, dls_cnt elements.  */
 188 } Dl_serinfo;
 189
 190 #else
 191
 192 /* Get information about the shared objects currently loaded */
 193 extern int dlinfo (void);
 194
 195 #endif
 196 #endif /* __USE_GNU */
 197
 198
 199 __END_DECLS
 200
 201 #endif  /* dlfcn.h */