diff options
| author | Damien Miller <djm@cvs.openbsd.org> | 2006-02-24 01:09:39 +0000 |
|---|---|---|
| committer | Damien Miller <djm@cvs.openbsd.org> | 2006-02-24 01:09:39 +0000 |
| commit | a11304e2597c2a67f356537b96ec1d8cb54a3fd4 (patch) | |
| tree | 485af13b9df7f3475d969032c5473569f755306d /lib/libarch | |
| parent | e83f29788d1785032e78fd8e875a9419890b4c7c (diff) | |
amd64_iopl() needs securelevel <= 0, or machdep.allowapeture > 0
just like i386_iopl()
Diffstat (limited to 'lib/libarch')
| -rw-r--r-- | lib/libarch/amd64/amd64_iopl.2 | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/lib/libarch/amd64/amd64_iopl.2 b/lib/libarch/amd64/amd64_iopl.2 index dd3471f73ab..d0ea5a978c3 100644 --- a/lib/libarch/amd64/amd64_iopl.2 +++ b/lib/libarch/amd64/amd64_iopl.2 @@ -1,4 +1,4 @@ -.\" $OpenBSD: amd64_iopl.2,v 1.2 2004/03/12 17:40:28 jmc Exp $ +.\" $OpenBSD: amd64_iopl.2,v 1.3 2006/02/24 01:09:38 djm Exp $ .\" $NetBSD: amd64_iopl.2,v 1.3 1996/02/27 22:57:25 jtc Exp $ .\" .\" Copyright (c) 1996 The NetBSD Foundation, Inc. @@ -50,7 +50,13 @@ .Fn amd64_iopl sets the amd64 I/O privilege level to the value specified by .Ar iopl . -This call is restricted to the superuser. +.Pp +This call may only be made by the superuser. +Additionally, it is only permitted when the +.Xr securelevel 7 +is less than or equal to 0 or the +.Va machdep.allowaperture +sysctl has been set to a non-zero value. .Pp .Sy Note: Code using the @@ -70,11 +76,14 @@ is set to indicate the error. will fail if: .Bl -tag -width [EINVAL] .It Bq Er EPERM -The caller was not the superuser. +The caller was not the superuser, or the securelevel is non-zero and +.Va machdep.allowaperture +has not been set to a non-zero value. .El .Sh SEE ALSO .Xr amd64_get_ioperm 2 , -.Xr amd64_set_ioperm 2 +.Xr amd64_set_ioperm 2 , +.Xr securelevel 7 .Sh REFERENCES .Rs .%A Intel |