5f21997b9d
2004-10-18 Jakub Jelinek <jakub@redhat.com> * elf/dl-libc.c (__libc_dlsym_private, __libc_register_dl_open_hook): New functions. (__libc_dlopen_mode): Call __libc_register_dl_open_hook and __libc_register_dlfcn_hook. * dlfcn/Makefile (routines, elide-routines.os): Set. Add rules to build and test tststatic2. * dlfcn/tststatic2.c: New test. * dlfcn/modstatic2.c: New test module. * dlfcn/dladdr.c: Call _dlfcn_hook from libdl.so if not NULL. Define __ prefixed routine in libc.a and in libdl.a just call it. * dlfcn/dladdr1.c: Likewise. * dlfcn/dlclose.c: Likewise. * dlfcn/dlerror.c: Likewise. * dlfcn/dlinfo.c: Likewise. * dlfcn/dlmopen.c: Likewise. * dlfcn/dlopen.c: Likewise. * dlfcn/dlopenold.c: Likewise. * dlfcn/dlsym.c: Likewise. * dlfcn/dlvsym.c: Likewise. * dlfcn/sdladdr.c: New file. * dlfcn/sdladdr1.c: New file. * dlfcn/sdlclose.c: New file. * dlfcn/sdlerror.c: New file. * dlfcn/sdlinfo.c: New file. * dlfcn/sdlopen.c: New file. * dlfcn/sdlsym.c: New file. * dlfcn/sdlvsym.c: New file. * dlfcn/Versions (libdl): Export _dlfcn_hook@GLIBC_PRIVATE. * include/dlfcn.h (DL_CALLER_DECL, DL_CALLER RETURN_ADDRESS): Define. (struct dlfcn_hook): New type. (_dlfcn_hook): New extern decl. (__dlopen, __dlclose, __dlsym, __dlerror, __dladdr, __dladdr1, __dlinfo, __dlmopen, __libc_dlsym_private, __libc_register_dl_open_hook, __libc_register_dlfcn_hook): New prototypes. (__dlvsym): Use DL_CALLER_DECL. * include/libc-symbols.h: Define libdl_hidden_proto and friends. * malloc/arena.c (_dl_open_hook): Extern decl. (ptmalloc_init): Don't call _dl_addr when dlopened from statically linked programs but don't use brk for them either.
136 lines
4.9 KiB
C
136 lines
4.9 KiB
C
#ifndef _DLFCN_H
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#include <dlfcn/dlfcn.h>
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#include <link.h> /* For ElfW. */
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/* Internally used flag. */
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#define __RTLD_DLOPEN 0x80000000
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#define __RTLD_SPROF 0x40000000
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#define __RTLD_OPENEXEC 0x20000000
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#define __RTLD_CALLMAP 0x10000000
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#define __LM_ID_CALLER -2
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/* Now define the internal interfaces. */
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#define __libc_dlopen(name) __libc_dlopen_mode (name, RTLD_LAZY)
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extern void *__libc_dlopen_mode (__const char *__name, int __mode);
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extern void *__libc_dlsym (void *__map, __const char *__name);
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extern int __libc_dlclose (void *__map);
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libc_hidden_proto (__libc_dlopen_mode)
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libc_hidden_proto (__libc_dlsym)
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libc_hidden_proto (__libc_dlclose)
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/* Locate shared object containing the given address. */
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#ifdef ElfW
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extern int _dl_addr (const void *address, Dl_info *info,
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struct link_map **mapp, const ElfW(Sym) **symbolp)
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internal_function;
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libc_hidden_proto (_dl_addr)
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#endif
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/* Open the shared object NAME, relocate it, and run its initializer if it
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hasn't already been run. MODE is as for `dlopen' (see <dlfcn.h>). If
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the object is already opened, returns its existing map. */
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extern void *_dl_open (const char *name, int mode, const void *caller,
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Lmid_t nsid)
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internal_function;
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libc_hidden_proto (_dl_open)
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/* Close an object previously opened by _dl_open. */
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extern void _dl_close (void *map)
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internal_function;
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libc_hidden_proto (_dl_close)
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/* Look up NAME in shared object HANDLE (which may be RTLD_DEFAULT or
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RTLD_NEXT). WHO is the calling function, for RTLD_NEXT. Returns
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the symbol value, which may be NULL. */
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extern void *_dl_sym (void *handle, const char *name, void *who)
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internal_function;
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/* Look up version VERSION of symbol NAME in shared object HANDLE
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(which may be RTLD_DEFAULT or RTLD_NEXT). WHO is the calling
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function, for RTLD_NEXT. Returns the symbol value, which may be
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NULL. */
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extern void *_dl_vsym (void *handle, const char *name, const char *version,
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void *who)
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internal_function;
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/* Call OPERATE, catching errors from `dl_signal_error'. If there is no
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error, *ERRSTRING is set to null. If there is an error, *ERRSTRING is
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set to a string constructed from the strings passed to _dl_signal_error,
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and the error code passed is the return value and *OBJNAME is set to
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the object name which experienced the problems. ERRSTRING if nonzero
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points to a malloc'ed string which the caller has to free after use.
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ARGS is passed as argument to OPERATE. */
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extern int _dl_catch_error (const char **objname, const char **errstring,
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void (*operate) (void *),
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void *args)
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internal_function;
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/* Helper function for <dlfcn.h> functions. Runs the OPERATE function via
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_dl_catch_error. Returns zero for success, nonzero for failure; and
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arranges for `dlerror' to return the error details.
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ARGS is passed as argument to OPERATE. */
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extern int _dlerror_run (void (*operate) (void *), void *args)
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internal_function;
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#ifdef SHARED
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# define DL_CALLER_DECL /* Nothing */
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# define DL_CALLER RETURN_ADDRESS (0)
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#else
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# define DL_CALLER_DECL , void *dl_caller
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# define DL_CALLER dl_caller
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#endif
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struct dlfcn_hook
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{
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void *(*dlopen) (const char *file, int mode, void *dl_caller);
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int (*dlclose) (void *handle);
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void *(*dlsym) (void *handle, const char *name, void *dl_caller);
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void *(*dlvsym) (void *handle, const char *name, const char *version,
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void *dl_caller);
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char *(*dlerror) (void);
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int (*dladdr) (const void *address, Dl_info *info);
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int (*dladdr1) (const void *address, Dl_info *info,
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void **extra_info, int flags);
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int (*dlinfo) (void *handle, int request, void *arg, void *dl_caller);
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void *(*dlmopen) (Lmid_t nsid, const char *file, int mode, void *dl_caller);
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void *pad[4];
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};
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extern struct dlfcn_hook *_dlfcn_hook;
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libdl_hidden_proto (_dlfcn_hook)
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extern void *__dlopen (const char *file, int mode DL_CALLER_DECL)
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attribute_hidden;
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extern void *__dlmopen (Lmid_t nsid, const char *file, int mode DL_CALLER_DECL)
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attribute_hidden;
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extern int __dlclose (void *handle)
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attribute_hidden;
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extern void *__dlsym (void *handle, const char *name DL_CALLER_DECL)
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attribute_hidden;
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extern void *__dlvsym (void *handle, const char *name, const char *version
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DL_CALLER_DECL)
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attribute_hidden;
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extern char *__dlerror (void)
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attribute_hidden;
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extern int __dladdr (const void *address, Dl_info *info)
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attribute_hidden;
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extern int __dladdr1 (const void *address, Dl_info *info,
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void **extra_info, int flags)
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attribute_hidden;
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extern int __dlinfo (void *handle, int request, void *arg DL_CALLER_DECL)
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attribute_hidden;
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#ifndef SHARED
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struct link_map;
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extern void * __libc_dlsym_private (struct link_map *map, const char *name)
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attribute_hidden;
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extern void __libc_register_dl_open_hook (struct link_map *map)
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attribute_hidden;
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extern void __libc_register_dlfcn_hook (struct link_map *map)
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attribute_hidden;
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#endif
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#endif
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