diff options
| author | Philip Guenther <guenther@cvs.openbsd.org> | 2015-09-01 05:40:07 +0000 |
|---|---|---|
| committer | Philip Guenther <guenther@cvs.openbsd.org> | 2015-09-01 05:40:07 +0000 |
| commit | 6552896c83d8e0c94ad668c1e07eec78a5035820 (patch) | |
| tree | d856dc9a981eb7f505c48e9852ed0636e4fb6f76 /lib/csu/i386 | |
| parent | 49917aa9a3d7bc9525154ccaed369d2ce4311649 (diff) | |
In static binaries, invoke kbind() once to disable it.
With much assistance from miod@
ok deraadt@@
Diffstat (limited to 'lib/csu/i386')
| -rw-r--r-- | lib/csu/i386/md_init.h | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/lib/csu/i386/md_init.h b/lib/csu/i386/md_init.h index 11a84c367f1..9e1606fa5f1 100644 --- a/lib/csu/i386/md_init.h +++ b/lib/csu/i386/md_init.h @@ -1,4 +1,4 @@ -/* $OpenBSD: md_init.h,v 1.5 2014/12/22 21:58:25 kurt Exp $ */ +/* $OpenBSD: md_init.h,v 1.6 2015/09/01 05:40:06 guenther Exp $ */ /*- * Copyright (c) 2001 Ross Harvey @@ -133,3 +133,12 @@ " int $0x80 \n" \ " ret \n" \ " .previous") + +#include <sys/syscall.h> +#define MD_DISABLE_KBIND \ + do { \ + register long syscall_num __asm("eax") = SYS_kbind; \ + __asm volatile("pushl $0; push %%eax; int $0x80;" \ + " addl $8, %%esp" : "+a" (syscall_num) : \ + : "edx", "cc"); \ + } while (0) |