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/* Stack executability handling for GNU dynamic linker.
Copyright (C) 2025 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/>. */
#include <ldsodefs.h>
#include <dl-tunables.h>
void
_dl_handle_execstack_tunable (void)
{
switch (TUNABLE_GET (glibc, rtld, execstack, int32_t, NULL))
{
case stack_tunable_mode_disable:
if ((__glibc_unlikely (GL(dl_stack_flags)) & PF_X))
_dl_fatal_printf (
"Fatal glibc error: executable stack is not allowed\n");
break;
case stack_tunable_mode_force:
if (_dl_make_stack_executable (&__libc_stack_end) != 0)
_dl_fatal_printf (
"Fatal glibc error: cannot enable executable stack as tunable requires");
break;
}
}
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