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* include/dlfcn.h (__RTLD_OPENEXEC): Define. * elf/dl-load.c (_dl_map_object_from_fd): Don't allow loading executables unless __RTLD_OPENEXEC flag is present. * elf/rtld.c (dl_main): Pass __RTLD_OPENEXEC flag to _dl_map_object when loading the executable. reverse lookup format for IPv6 addresses is using bitstring and * resolv/ns_name.c: Implement encoding and decoding bitstring in
80 lines
3.1 KiB
C
80 lines
3.1 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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/* Now define the internal interfaces. */
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extern void *__dlvsym (void *__handle, __const char *__name,
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__const char *__version);
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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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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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extern int _dl_catch_error_internal (const char **objname,
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const char **errstring,
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void (*operate) (void *), 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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#endif
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