/* User functions for run-time dynamic loading.
- Copyright (C) 1995-1999, 2000 Free Software Foundation, Inc.
+ Copyright (C) 1995-2001,2003,2004,2006,2009 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
#ifndef _DLFCN_H
#define _DLFCN_H 1
the run-time address of the symbol called NAME in the global scope
is returned. */
# define RTLD_DEFAULT ((void *) 0)
+
+
+# if 0 /* uClibc doesnt support this */
+/* Type for namespace indeces. */
+typedef long int Lmid_t;
+
+/* Special namespace ID values. */
+# define LM_ID_BASE 0 /* Initial namespace. */
+# define LM_ID_NEWLM -1 /* For dlmopen: request new namespace. */
+# endif
#endif
+
__BEGIN_DECLS
/* Open the shared object FILE and map it in; return a handle that can be
passed to `dlsym' to get symbol values from it. */
-extern void *dlopen (__const char *__file, int __mode) __THROW;
+extern void *dlopen (const char *__file, int __mode) __THROW;
/* Unmap and close a shared object opened by `dlopen'.
The handle cannot be used again after calling `dlclose'. */
-extern int dlclose (void *__handle) __THROW;
+extern int dlclose (void *__handle) __THROW __nonnull ((1));
/* Find the run-time address in the shared object HANDLE refers to
of the symbol called NAME. */
extern void *dlsym (void *__restrict __handle,
- __const char *__restrict __name) __THROW;
+ const char *__restrict __name) __THROW __nonnull ((2));
+
+#if 0 /*def __USE_GNU*/
+/* Like `dlopen', but request object to be allocated in a new namespace. */
+extern void *dlmopen (Lmid_t __nsid, const char *__file, int __mode) __THROW;
+
+/* Find the run-time address in the shared object HANDLE refers to
+ of the symbol called NAME with VERSION. */
+extern void *dlvsym (void *__restrict __handle,
+ const char *__restrict __name,
+ const char *__restrict __version)
+ __THROW __nonnull ((2, 3));
+#endif
/* When any of the above functions fails, call this function
to return a string describing the error. Each call resets
the error string so that a following call returns null. */
extern char *dlerror (void) __THROW;
+
#ifdef __USE_GNU
/* Structure containing information about object searched using
`dladdr'. */
typedef struct
{
- __const char *dli_fname; /* File name of defining object. */
+ const char *dli_fname; /* File name of defining object. */
void *dli_fbase; /* Load address of that object. */
- __const char *dli_sname; /* Name of nearest symbol. */
+ const char *dli_sname; /* Name of nearest symbol. */
void *dli_saddr; /* Exact value of nearest symbol. */
} Dl_info;
/* Fill in *INFO with the following information about ADDRESS.
Returns 0 iff no shared object's segments contain that address. */
-extern int dladdr (const void *__address, Dl_info *__info) __THROW;
-
-/* Get information about the shared objects currently loaded */
-extern int dlinfo (void);
+extern int dladdr (const void *__address, Dl_info *__info)
+ __THROW __nonnull ((2));
+
+#if 0 /* not supported by uClibc */
+/* Same as `dladdr', but additionally sets *EXTRA_INFO according to FLAGS. */
+extern int dladdr1 (const void *__address, Dl_info *__info,
+ void **__extra_info, int __flags) __THROW __nonnull ((2));
+
+/* These are the possible values for the FLAGS argument to `dladdr1'.
+ This indicates what extra information is stored at *EXTRA_INFO.
+ It may also be zero, in which case the EXTRA_INFO argument is not used. */
+enum
+ {
+ /* Matching symbol table entry (const ElfNN_Sym *). */
+ RTLD_DL_SYMENT = 1,
+
+ /* The object containing the address (struct link_map *). */
+ RTLD_DL_LINKMAP = 2
+ };
+
+
+/* Get information about the shared object HANDLE refers to.
+ REQUEST is from among the values below, and determines the use of ARG.
+
+ On success, returns zero. On failure, returns -1 and records an error
+ message to be fetched with `dlerror'. */
+extern int dlinfo (void *__restrict __handle,
+ int __request, void *__restrict __arg)
+ __THROW __nonnull ((1, 3));
+
+/* These are the possible values for the REQUEST argument to `dlinfo'. */
+enum
+ {
+ /* Treat ARG as `lmid_t *'; store namespace ID for HANDLE there. */
+ RTLD_DI_LMID = 1,
+
+ /* Treat ARG as `struct link_map **';
+ store the `struct link_map *' for HANDLE there. */
+ RTLD_DI_LINKMAP = 2,
+
+ RTLD_DI_CONFIGADDR = 3, /* Unsupported, defined by Solaris. */
+
+ /* Treat ARG as `Dl_serinfo *' (see below), and fill in to describe the
+ directories that will be searched for dependencies of this object.
+ RTLD_DI_SERINFOSIZE fills in just the `dls_cnt' and `dls_size'
+ entries to indicate the size of the buffer that must be passed to
+ RTLD_DI_SERINFO to fill in the full information. */
+ RTLD_DI_SERINFO = 4,
+ RTLD_DI_SERINFOSIZE = 5,
+
+ /* Treat ARG as `char *', and store there the directory name used to
+ expand $ORIGIN in this shared object's dependency file names. */
+ RTLD_DI_ORIGIN = 6,
+
+ RTLD_DI_PROFILENAME = 7, /* Unsupported, defined by Solaris. */
+ RTLD_DI_PROFILEOUT = 8, /* Unsupported, defined by Solaris. */
+
+ /* Treat ARG as `size_t *', and store there the TLS module ID
+ of this object's PT_TLS segment, as used in TLS relocations;
+ store zero if this object does not define a PT_TLS segment. */
+ RTLD_DI_TLS_MODID = 9,
+
+ /* Treat ARG as `void **', and store there a pointer to the calling
+ thread's TLS block corresponding to this object's PT_TLS segment.
+ Store a null pointer if this object does not define a PT_TLS
+ segment, or if the calling thread has not allocated a block for it. */
+ RTLD_DI_TLS_DATA = 10,
+
+ RTLD_DI_MAX = 10
+ };
+
+
+/* This is the type of elements in `Dl_serinfo', below.
+ The `dls_name' member points to space in the buffer passed to `dlinfo'. */
+typedef struct
+{
+ char *dls_name; /* Name of library search path directory. */
+ unsigned int dls_flags; /* Indicates where this directory came from. */
+} Dl_serpath;
+/* This is the structure that must be passed (by reference) to `dlinfo' for
+ the RTLD_DI_SERINFO and RTLD_DI_SERINFOSIZE requests. */
+typedef struct
+{
+ size_t dls_size; /* Size in bytes of the whole buffer. */
+ unsigned int dls_cnt; /* Number of elements in `dls_serpath'. */
+ Dl_serpath dls_serpath[1]; /* Actually longer, dls_cnt elements. */
+} Dl_serinfo;
#endif
+#endif /* __USE_GNU */
+
__END_DECLS
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