glibc/sysdeps/x86/dl-procruntime.c
H.J. Lu 1fabdb9908 x86: Remove ARCH_CET_LEGACY_BITMAP [BZ #25397]
Since legacy bitmap doesn't cover jitted code generated by legacy JIT
engine, it isn't very useful.  This patch removes ARCH_CET_LEGACY_BITMAP
and treats indirect branch tracking similar to shadow stack by removing
legacy bitmap support.

Tested on CET Linux/x86-64 and non-CET Linux/x86-64.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2020-03-18 04:35:54 -07:00

58 lines
1.8 KiB
C

/* Data for processor runtime information. x86 version.
Copyright (C) 2018-2020 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/>. */
/* This information must be kept in sync with the _DL_HWCAP_COUNT,
HWCAP_PLATFORMS_START and HWCAP_PLATFORMS_COUNT definitions in
dl-hwcap.h.
If anything should be added here check whether the size of each string
is still ok with the given array size.
All the #ifdefs in the definitions are quite irritating but
necessary if we want to avoid duplicating the information. There
are three different modes:
- PROCINFO_DECL is defined. This means we are only interested in
declarations.
- PROCINFO_DECL is not defined:
+ if SHARED is defined the file is included in an array
initializer. The .element = { ... } syntax is needed.
+ if SHARED is not defined a normal array initialization is
needed.
*/
#ifndef PROCINFO_CLASS
# define PROCINFO_CLASS
#endif
#if !IS_IN (ldconfig)
# if !defined PROCINFO_DECL && defined SHARED
._dl_x86_feature_1
# else
PROCINFO_CLASS unsigned int _dl_x86_feature_1[2]
# endif
# if !defined SHARED || defined PROCINFO_DECL
;
# else
,
# endif
#endif