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/sh | |
| parent | 49917aa9a3d7bc9525154ccaed369d2ce4311649 (diff) | |
In static binaries, invoke kbind() once to disable it.
With much assistance from miod@
ok deraadt@@
Diffstat (limited to 'lib/csu/sh')
| -rw-r--r-- | lib/csu/sh/md_init.h | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/lib/csu/sh/md_init.h b/lib/csu/sh/md_init.h index 7a1b5d971b2..359b5ac7347 100644 --- a/lib/csu/sh/md_init.h +++ b/lib/csu/sh/md_init.h @@ -1,4 +1,4 @@ -/* $OpenBSD: md_init.h,v 1.4 2014/12/30 19:26:38 miod Exp $ */ +/* $OpenBSD: md_init.h,v 1.5 2015/09/01 05:40:06 guenther Exp $ */ /* $NetBSD: dot_init.h,v 1.3 2005/12/24 22:02:10 perry Exp $ */ /*- @@ -147,3 +147,12 @@ __asm(".section " #section "\n" \ /* no ASM stub for __start; the C routine can be called directly */ #define MD_START ___start + +#include <sys/syscall.h> +#define MD_DISABLE_KBIND \ + do { \ + register long syscall_num __asm("r0") = SYS_kbind; \ + register void *arg1 __asm("r4") = NULL; \ + __asm volatile("trapa #0x80" : "+r" (syscall_num) \ + : "r" (arg1) : "r1", "cc"); \ + } while (0) |