diff options
Diffstat (limited to 'elf/dl-caller.c')
| -rw-r--r-- | elf/dl-caller.c | 86 |
1 files changed, 0 insertions, 86 deletions
diff --git a/elf/dl-caller.c b/elf/dl-caller.c deleted file mode 100644 index b4c5335baa..0000000000 --- a/elf/dl-caller.c +++ /dev/null @@ -1,86 +0,0 @@ -/* Check whether caller comes from the right place. - Copyright (C) 2004-2017 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, see - <http://www.gnu.org/licenses/>. */ - -#include <assert.h> -#include <ldsodefs.h> -#include <stddef.h> -#include <caller.h> -#include <gnu/lib-names.h> - - -int -attribute_hidden -_dl_check_caller (const void *caller, enum allowmask mask) -{ - static const char expected1[] = LIBC_SO; - static const char expected2[] = LIBDL_SO; -#ifdef LIBPTHREAD_SO - static const char expected3[] = LIBPTHREAD_SO; -#endif - static const char expected4[] = LD_SO; - - for (Lmid_t ns = 0; ns < GL(dl_nns); ++ns) - for (struct link_map *l = GL(dl_ns)[ns]._ns_loaded; l != NULL; - l = l->l_next) - if (caller >= (const void *) l->l_map_start - && caller < (const void *) l->l_text_end) - { - /* The address falls into this DSO's address range. Check the - name. */ - if ((mask & allow_libc) && strcmp (expected1, l->l_name) == 0) - return 0; - if ((mask & allow_libdl) && strcmp (expected2, l->l_name) == 0) - return 0; -#ifdef LIBPTHREAD_SO - if ((mask & allow_libpthread) && strcmp (expected3, l->l_name) == 0) - return 0; -#endif - if ((mask & allow_ldso) && strcmp (expected4, l->l_name) == 0) - return 0; - - struct libname_list *runp = l->l_libname; - - while (runp != NULL) - { - if ((mask & allow_libc) && strcmp (expected1, runp->name) == 0) - return 0; - if ((mask & allow_libdl) && strcmp (expected2, runp->name) == 0) - return 0; -#ifdef LIBPTHREAD_SO - if ((mask & allow_libpthread) - && strcmp (expected3, runp->name) == 0) - return 0; -#endif - if ((mask & allow_ldso) && strcmp (expected4, runp->name) == 0) - return 0; - - runp = runp->next; - } - - break; - } - - /* Maybe the dynamic linker is not yet on the list. */ - if ((mask & allow_ldso) != 0 - && caller >= (const void *) GL(dl_rtld_map).l_map_start - && caller < (const void *) GL(dl_rtld_map).l_text_end) - return 0; - - /* No valid caller. */ - return 1; -} |