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author | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
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committer | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
commit | 5046dbb4a7eba5eccfd258f92f4735c9ffc8d069 (patch) | |
tree | 4470480d904b65cf14ca524f96f79eca818c3eaf /elf/dl-addr-obj.c | |
parent | 199fc19d3aaaf57944ef036e15904febe877fc93 (diff) | |
download | glibc-zack/build-layout-experiment.tar glibc-zack/build-layout-experiment.tar.gz glibc-zack/build-layout-experiment.tar.bz2 glibc-zack/build-layout-experiment.zip |
Prepare for radical source tree reorganization.zack/build-layout-experiment
All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).
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; -} |