diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/dl-execstack.c')
-rw-r--r-- | sysdeps/unix/sysv/linux/dl-execstack.c | 67 |
1 files changed, 0 insertions, 67 deletions
diff --git a/sysdeps/unix/sysv/linux/dl-execstack.c b/sysdeps/unix/sysv/linux/dl-execstack.c deleted file mode 100644 index 3c4de1cb46..0000000000 --- a/sysdeps/unix/sysv/linux/dl-execstack.c +++ /dev/null @@ -1,67 +0,0 @@ -/* Stack executability handling for GNU dynamic linker. Linux version. - Copyright (C) 2003-2017 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 - <http://www.gnu.org/licenses/>. */ - -#include <ldsodefs.h> -#include <sys/mman.h> -#include <errno.h> -#include <libintl.h> -#include <stdbool.h> -#include <stackinfo.h> -#include <caller.h> -#include <sysdep.h> - - -extern int __stack_prot attribute_relro attribute_hidden; - - -int -internal_function -_dl_make_stack_executable (void **stack_endp) -{ - /* This gives us the highest/lowest page that needs to be changed. */ - uintptr_t page = ((uintptr_t) *stack_endp - & -(intptr_t) GLRO(dl_pagesize)); - int result = 0; - - /* Challenge the caller. */ - if (__builtin_expect (__check_caller (RETURN_ADDRESS (0), - allow_ldso|allow_libpthread) != 0, 0) - || __builtin_expect (*stack_endp != __libc_stack_end, 0)) - return EPERM; - - if (__builtin_expect (__mprotect ((void *) page, GLRO(dl_pagesize), - __stack_prot) == 0, 1)) - goto return_success; - result = errno; - goto out; - - return_success: - /* Clear the address. */ - *stack_endp = NULL; - - /* Remember that we changed the permission. */ - GL(dl_stack_flags) |= PF_X; - - out: -#ifdef check_consistency - check_consistency (); -#endif - - return result; -} -rtld_hidden_def (_dl_make_stack_executable) |