diff options
Diffstat (limited to 'newlib/libc/sys/linux/include/dlfcn.h')
| -rw-r--r-- | newlib/libc/sys/linux/include/dlfcn.h | 149 |
1 files changed, 84 insertions, 65 deletions
diff --git a/newlib/libc/sys/linux/include/dlfcn.h b/newlib/libc/sys/linux/include/dlfcn.h index 75d7526b0..67ba73d5d 100644 --- a/newlib/libc/sys/linux/include/dlfcn.h +++ b/newlib/libc/sys/linux/include/dlfcn.h @@ -1,65 +1,84 @@ -#ifndef _DLFCN_H -#include <dl/dlfcn.h> - -#define internal_function - -/* Internally used flag. */ -#define __RTLD_DLOPEN 0x80000000 -#define __RTLD_SPROF 0x40000000 - -/* Now define the internal interfaces. */ -extern void *__dlvsym (void *__handle, __const char *__name, - __const char *__version); - -extern void *__libc_dlopen (__const char *__name); -extern void *__libc_dlsym (void *__map, __const char *__name); -extern int __libc_dlclose (void *__map); - -/* Locate shared object containing the given address. */ -extern int _dl_addr (const void *address, Dl_info *info) - internal_function; - -/* Open the shared object NAME, relocate it, and run its initializer if it - hasn't already been run. MODE is as for `dlopen' (see <dlfcn.h>). If - the object is already opened, returns its existing map. */ -extern void *_dl_open (const char *name, int mode, const void *caller) - internal_function; - -/* Close an object previously opened by _dl_open. */ -extern void _dl_close (void *map) - internal_function; - -/* Look up NAME in shared object HANDLE (which may be RTLD_DEFAULT or - RTLD_NEXT). WHO is the calling function, for RTLD_NEXT. Returns - the symbol value, which may be NULL. */ -extern void *_dl_sym (void *handle, const char *name, void *who) - internal_function; - -/* Look up version VERSION of symbol NAME in shared object HANDLE - (which may be RTLD_DEFAULT or RTLD_NEXT). WHO is the calling - function, for RTLD_NEXT. Returns the symbol value, which may be - NULL. */ -extern void *_dl_vsym (void *handle, const char *name, const char *version, - void *who) - internal_function; - -/* Call OPERATE, catching errors from `dl_signal_error'. If there is no - error, *ERRSTRING is set to null. If there is an error, *ERRSTRING is - set to a string constructed from the strings passed to _dl_signal_error, - and the error code passed is the return value and *OBJNAME is set to - the object name which experienced the problems. ERRSTRING if nonzero - points to a malloc'ed string which the caller has to free after use. - ARGS is passed as argument to OPERATE. */ -extern int _dl_catch_error (const char **objname, const char **errstring, - void (*operate) (void *), - void *args) - internal_function; - -/* Helper function for <dlfcn.h> functions. Runs the OPERATE function via - _dl_catch_error. Returns zero for success, nonzero for failure; and - arranges for `dlerror' to return the error details. - ARGS is passed as argument to OPERATE. */ -extern int _dlerror_run (void (*operate) (void *), void *args) - internal_function; - -#endif +/* 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 */ |