1 | /* |
2 | * Copyright (c) 2013 Apple Inc. All rights reserved. |
3 | * |
4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
5 | * |
6 | * This file contains Original Code and/or Modifications of Original Code |
7 | * as defined in and that are subject to the Apple Public Source License |
8 | * Version 2.0 (the 'License'). You may not use this file except in |
9 | * compliance with the License. The rights granted to you under the License |
10 | * may not be used to create, or enable the creation or redistribution of, |
11 | * unlawful or unlicensed copies of an Apple operating system, or to |
12 | * circumvent, violate, or enable the circumvention or violation of, any |
13 | * terms of an Apple operating system software license agreement. |
14 | * |
15 | * Please obtain a copy of the License at |
16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. |
17 | * |
18 | * The Original Code and all software distributed under the License are |
19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
23 | * Please see the License for the specific language governing rights and |
24 | * limitations under the License. |
25 | * |
26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
27 | */ |
28 | #include <kern/debug.h> |
29 | #include <sys/param.h> |
30 | #include <sys/mman.h> |
31 | #include <sys/stat.h> |
32 | #include <sys/sysctl.h> |
33 | #include <sys/priv.h> |
34 | #include <mach/machine.h> |
35 | #include <libkern/libkern.h> |
36 | #include <kern/assert.h> |
37 | #include <pexpert/pexpert.h> |
38 | #include <kern/ecc.h> |
39 | |
40 | static int |
41 | get_ecc_data_handler(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, |
42 | struct sysctl_req *req) |
43 | { |
44 | struct ecc_event ev; |
45 | int changed, retval; |
46 | |
47 | if (priv_check_cred(cred: kauth_cred_get(), PRIV_HW_DEBUG_DATA, flags: 0) != 0) { |
48 | return EPERM; |
49 | } |
50 | |
51 | if (KERN_SUCCESS != ecc_log_get_next_event(ev: &ev)) { |
52 | /* |
53 | * EAGAIN would be better, but sysctl infrastructure |
54 | * interprets that */ |
55 | return EBUSY; |
56 | } |
57 | |
58 | retval = sysctl_io_opaque(req, pValue: &ev, valueSize: sizeof(ev), changed: &changed); |
59 | assert(!changed); |
60 | |
61 | return retval; |
62 | } |
63 | |
64 | SYSCTL_PROC(_kern, OID_AUTO, next_ecc_event, |
65 | CTLFLAG_RD | CTLFLAG_ANYBODY | CTLFLAG_MASKED | CTLTYPE_STRUCT, |
66 | 0, 0, get_ecc_data_handler, |
67 | "-" , "" ); |
68 | |