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, 65 insertions, 84 deletions
diff --git a/newlib/libc/sys/linux/include/dlfcn.h b/newlib/libc/sys/linux/include/dlfcn.h index 67ba73d5d..75d7526b0 100644 --- a/newlib/libc/sys/linux/include/dlfcn.h +++ b/newlib/libc/sys/linux/include/dlfcn.h @@ -1,84 +1,65 @@ -/* 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 */ +#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 |