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Diffstat (limited to 'newlib/libc/sys/linux/dl/dlfcn.h')
-rw-r--r-- | newlib/libc/sys/linux/dl/dlfcn.h | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/newlib/libc/sys/linux/dl/dlfcn.h b/newlib/libc/sys/linux/dl/dlfcn.h new file mode 100644 index 000000000..67ba73d5d --- /dev/null +++ b/newlib/libc/sys/linux/dl/dlfcn.h @@ -0,0 +1,84 @@ +/* User functions for run-time dynamic loading. + Copyright (C) 1995-1999, 2000, 2001 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 + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + 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. */ + +#ifndef _DLFCN_H +#define _DLFCN_H 1 + +#include <features.h> + +/* Collect various system dependent definitions and declarations. */ +#include <sys/dlfcn.h> + + +/* If the first argument of `dlsym' or `dlvsym' is set to RTLD_NEXT + the run-time address of the symbol called NAME in the next shared + object is returned. The "next" relation is defined by the order + the shared objects were loaded. */ +# define RTLD_NEXT ((void *) -1l) + +/* If the first argument to `dlsym' or `dlvsym' is set to RTLD_DEFAULT + the run-time address of the symbol called NAME in the global scope + is returned. */ +# define RTLD_DEFAULT ((void *) 0) + + +__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; + +/* Unmap and close a shared object opened by `dlopen'. + The handle cannot be used again after calling `dlclose'. */ +extern int dlclose (void *__handle) __THROW; + +/* 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; + +/* 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; + +/* 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; + + +/* Structure containing information about object searched using + `dladdr'. */ +typedef struct +{ + __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. */ + 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; + +__END_DECLS + +#endif /* dlfcn.h */ |