mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-15 09:30:06 +00:00
51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
/* Stack executability handling for GNU dynamic linker. Hurd version.
|
|
Copyright (C) 2004-2020 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/>. */
|
|
|
|
#include <ldsodefs.h>
|
|
#include <hurdstartup.h>
|
|
#include <errno.h>
|
|
|
|
extern struct hurd_startup_data *_dl_hurd_data attribute_hidden;
|
|
|
|
/* There is no portable way to know the bounds of the initial thread's stack
|
|
so as to mprotect it. */
|
|
|
|
int
|
|
_dl_make_stack_executable (void **stack_endp)
|
|
{
|
|
/* Challenge the caller. */
|
|
if (__builtin_expect (*stack_endp != __libc_stack_end, 0))
|
|
return EPERM;
|
|
*stack_endp = NULL;
|
|
|
|
#if IS_IN (rtld)
|
|
if (__mprotect ((void *)_dl_hurd_data->stack_base, _dl_hurd_data->stack_size,
|
|
PROT_READ|PROT_WRITE|PROT_EXEC) != 0)
|
|
return errno;
|
|
|
|
/* Remember that we changed the permission. */
|
|
GL(dl_stack_flags) |= PF_X;
|
|
|
|
return 0;
|
|
#else
|
|
/* We don't bother to implement this for static linking. */
|
|
return ENOSYS;
|
|
#endif
|
|
}
|
|
rtld_hidden_def (_dl_make_stack_executable)
|