diff options
Diffstat (limited to 'elf/dl-dst.h')
| -rw-r--r-- | elf/dl-dst.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/elf/dl-dst.h b/elf/dl-dst.h new file mode 100644 index 0000000000..4b014d6ed5 --- /dev/null +++ b/elf/dl-dst.h @@ -0,0 +1,72 @@ +/* Handling of dynamic sring tokens. + Copyright (C) 1999 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +/* Determine the number of DST elements in the name. Only if IS_PATH is + nonzero paths are recognized (i.e., multiple, ':' separated filenames). */ +#define DL_DST_COUNT(name, is_path) \ + ({ \ + size_t __cnt = 0; \ + const char *__sf = strchr (name, '$'); \ + \ + if (__sf != NULL) \ + __cnt = _dl_dst_count (__sf, is_path); \ + \ + __cnt; }) + +/* Prototype for used function. */ +extern size_t _dl_dst_count (const char *name, int is_path); + + +/* Guess from the number of DSTs the length of the restul string. */ +#define DL_DST_REQUIRED(l, name, len, cnt) \ + ({ \ + size_t origin_len; \ + size_t __len = (len); \ + \ + /* Now we make a guess how many extra characters on top of the length \ + of S we need to represent the result. We know that we have CNT \ + replacements. Each at most can use \ + MAX (strlen (ORIGIN), strlen (_dl_platform)) \ + minus 7 (which is the length of "$ORIGIN"). \ + \ + First get the origin string if it is not available yet. This can \ + only happen for the map of the executable. */ \ + if ((l)->l_origin == NULL) \ + { \ + assert ((l)->l_name[0] == '\0'); \ + (l)->l_origin = _dl_get_origin (); \ + origin_len = ((l)->l_origin && (l)->l_origin != (char *) -1 \ + ? strlen ((l)->l_origin) : 0); \ + } \ + else \ + origin_len = (l)->l_origin == (char *) -1 ? 0 : strlen ((l)->l_origin); \ + \ + __len + cnt * (MAX (origin_len, _dl_platformlen) - 7); }) + +/* Find origin of the executable. */ +extern const char *_dl_get_origin (void); + + +/* Perform the DST substitution. */ +#define DL_DST_SUBSTITUTE(l, name, res, is_path) \ + _dl_dst_substitute (l, name, res, is_path) + +/* Prototype for used function. */ +extern char *_dl_dst_substitute (struct link_map *l, const char *name, + char *result, int is_path); |