diff options
| author | Philip Guenther <guenther@cvs.openbsd.org> | 2016-03-12 23:28:48 +0000 |
|---|---|---|
| committer | Philip Guenther <guenther@cvs.openbsd.org> | 2016-03-12 23:28:48 +0000 |
| commit | 6b6c20daf573d5bf1ea13ff899c5b18a679d07c4 (patch) | |
| tree | 5969b0cedf42f827cd8327255a80c98439bb10e8 /lib/csu | |
| parent | 6a03f10f3616e75dc562dab3a90d54625a97abb7 (diff) | |
Call mprotect() via its hidden _lib_mprotect alias to avoid accidental
overriding
ok deraadt@ kettenis@
Diffstat (limited to 'lib/csu')
| -rw-r--r-- | lib/csu/boot.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/lib/csu/boot.h b/lib/csu/boot.h index a4867b3035f..66d12e808f0 100644 --- a/lib/csu/boot.h +++ b/lib/csu/boot.h @@ -1,4 +1,4 @@ -/* $OpenBSD: boot.h,v 1.14 2015/12/06 23:36:12 guenther Exp $ */ +/* $OpenBSD: boot.h,v 1.15 2016/03/12 23:28:47 guenther Exp $ */ /* * Copyright (c) 1998 Per Fogelstrom, Opsycon AB @@ -50,6 +50,13 @@ #include "stdlib.h" #include "dl_prebind.h" +/* + * Use the internal, hidden name for any syscalls we need, to avoid + * accidental override by application code + */ +#define REDIRECT_SYSCALL(x) typeof(x) x asm("_libc_"#x) __dso_hidden +REDIRECT_SYSCALL(mprotect); + #ifdef RCRT0 #define DT_PROC(n) ((n) - DT_LOPROC) |