diff options
Diffstat (limited to 'elf/dl-addr-obj.c')
| -rw-r--r-- | elf/dl-addr-obj.c | 75 |
1 files changed, 0 insertions, 75 deletions
diff --git a/elf/dl-addr-obj.c b/elf/dl-addr-obj.c deleted file mode 100644 index 62aa630ce5..0000000000 --- a/elf/dl-addr-obj.c +++ /dev/null @@ -1,75 +0,0 @@ -/* Determine if address is inside object load segments. - Copyright (C) 1996-2017 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 <link.h> -#include <elf.h> - -/* Return non-zero if ADDR lies within one of L's loadable segments. - We have three cases we care about. - - Case 1: addr is above a segment. - +==================+<- l_map_end - | |<- addr - |------------------|<- l_addr + p_vaddr + p_memsz - | | - | | - |------------------|<- l_addr + p_vaddr - |------------------|<- l_addr - | | - +==================+<- l_map_start - - Case 2: addr is within a segments. - +==================+<- l_map_end - | | - |------------------|<- l_addr + p_vaddr + p_memsz - | |<- addr - | | - |------------------|<- l_addr + p_vaddr - |------------------|<- l_addr - | | - +==================+<- l_map_start - - Case 3: addr is below a segments. - +==================+<- l_map_end - | | - |------------------|<- l_addr + p_vaddr + p_memsz - | | - | | - |------------------|<- l_addr + p_vaddr - |------------------|<- l_addr - | |<- addr - +==================+<- l_map_start - - All the arithmetic is unsigned and we shift all the values down by - l_addr + p_vaddr and then compare the normalized addr to the range - of interest i.e. 0 <= addr < p_memsz. - -*/ -int -internal_function -_dl_addr_inside_object (struct link_map *l, const ElfW(Addr) addr) -{ - int n = l->l_phnum; - const ElfW(Addr) reladdr = addr - l->l_addr; - - while (--n >= 0) - if (l->l_phdr[n].p_type == PT_LOAD - && reladdr - l->l_phdr[n].p_vaddr < l->l_phdr[n].p_memsz) - return 1; - return 0; -} |