mirror of
https://sourceware.org/git/glibc.git
synced 2024-09-19 16:10:01 +00:00
457bd9cf2e
Systemd execution environment configuration may prohibit changing a memory mapping to become executable: MemoryDenyWriteExecute= Takes a boolean argument. If set, attempts to create memory mappings that are writable and executable at the same time, or to change existing memory mappings to become executable, or mapping shared memory segments as executable, are prohibited. When it is set, systemd service stops working if PLT rewrite is enabled. Check if mprotect works before rewriting PLT. This fixes BZ #31230. This also works with SELinux when deny_execmem is on. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
26 lines
914 B
C
26 lines
914 B
C
/* PLT rewrite helper function. x86-64 version.
|
|
Copyright (C) 2024 Free Software Foundation, Inc.
|
|
|
|
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/>. */
|
|
|
|
#include <stdbool.h>
|
|
#include <sys/mman.h>
|
|
|
|
static __always_inline bool
|
|
dl_plt_rewrite_supported (void)
|
|
{
|
|
return true;
|
|
}
|