diff options
Diffstat (limited to 'support')
| -rw-r--r-- | support/Makefile | 1 | ||||
| -rw-r--r-- | support/xmprotect.c | 28 | ||||
| -rw-r--r-- | support/xunistd.h | 2 |
3 files changed, 30 insertions, 1 deletions
diff --git a/support/Makefile b/support/Makefile index a2480cdc70..423538d06a 100644 --- a/support/Makefile +++ b/support/Makefile @@ -74,6 +74,7 @@ libsupport-routines = \ xmemstream \ xmkdir \ xmmap \ + xmprotect \ xmunmap \ xopen \ xpipe \ diff --git a/support/xmprotect.c b/support/xmprotect.c new file mode 100644 index 0000000000..9410251c32 --- /dev/null +++ b/support/xmprotect.c @@ -0,0 +1,28 @@ +/* mprotect with error checking. + Copyright (C) 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 <support/check.h> +#include <support/xunistd.h> +#include <sys/mman.h> + +void +xmprotect (void *addr, size_t length, int prot) +{ + if (mprotect (addr, length, prot) != 0) + FAIL_EXIT1 ("mprotect (%p, %zu, 0x%x): %m", addr, length, prot); +} diff --git a/support/xunistd.h b/support/xunistd.h index 151d743e1f..c947bfd8fb 100644 --- a/support/xunistd.h +++ b/support/xunistd.h @@ -48,7 +48,7 @@ void xwrite (int, const void *, size_t); /* Invoke mmap with a zero file offset. */ void *xmmap (void *addr, size_t length, int prot, int flags, int fd); - +void xmprotect (void *addr, size_t length, int prot); void xmunmap (void *addr, size_t length); __END_DECLS |