mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-26 23:10:06 +00:00
32612615c5
The audit symbind callback is not called for binaries built with -Wl,-z,now or when LD_BIND_NOW=1 is used, nor the PLT tracking callbacks (plt_enter and plt_exit) since this would change the expected program semantics (where no PLT is expected) and would have performance implications (such as for BZ#15533). LAV_CURRENT is also bumped to indicate the audit ABI change (where la_symbind flags are set by the loader to indicate no possible PLT trace). To handle powerpc64 ELFv1 function descriptor, _dl_audit_symbind requires to know whether bind-now is used so the symbol value is updated to function text segment instead of the OPD (for lazy binding this is done by PPC64_LOAD_FUNCPTR on _dl_runtime_resolve). Checked on x86_64-linux-gnu, i686-linux-gnu, aarch64-linux-gnu, powerpc64-linux-gnu. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
32 lines
1.4 KiB
C
32 lines
1.4 KiB
C
/* Configuration of lookup functions.
|
|
Copyright (C) 2002-2022 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
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
/* The type of the return value of fixup/profile_fixup. */
|
|
#define DL_FIXUP_VALUE_TYPE ElfW(Addr)
|
|
/* Construct a value of type DL_FIXUP_VALUE_TYPE from a code address
|
|
and a link map. */
|
|
#define DL_FIXUP_MAKE_VALUE(map, addr) (addr)
|
|
/* Extract the code address from a value of type DL_FIXUP_MAKE_VALUE.
|
|
*/
|
|
#define DL_FIXUP_VALUE_CODE_ADDR(value) (value)
|
|
#define DL_FIXUP_VALUE_ADDR(value) (value)
|
|
#define DL_FIXUP_ADDR_VALUE(addr) (addr)
|
|
#define DL_FIXUP_BINDNOW_ADDR_VALUE(addr) (addr)
|
|
#define DL_FIXUP_BINDNOW_RELOC(value, new_value, st_value) \
|
|
(*value) = st_value;
|