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exc_guard.h
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exc_guard.h
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/*
* Copyright (c) 2016 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* Mach Operating System
* Copyright (c) 1989 Carnegie-Mellon University
* Copyright (c) 1988 Carnegie-Mellon University
* Copyright (c) 1987 Carnegie-Mellon University
* All rights reserved. The CMU software License Agreement specifies
* the terms and conditions for use and redistribution.
*/
/*
* EXC_GUARD related macros, namespace etc.
*/
#ifndef _EXC_GUARD_H_
#define _EXC_GUARD_H_
/*
* EXC_GUARD exception code namespace.
*
* code:
* +-------------------+----------------+--------------+
* |[63:61] guard type | [60:32] flavor | [31:0] target|
* +-------------------+----------------+--------------+
*
* subcode:
* +---------------------------------------------------+
* |[63:0] guard identifier |
* +---------------------------------------------------+
*/
#define EXC_GUARD_DECODE_GUARD_TYPE(code) \
((((uint64_t)(code)) >> 61) & 0x7ull)
#define EXC_GUARD_DECODE_GUARD_FLAVOR(code) \
((((uint64_t)(code)) >> 32) & 0x1fffffff)
#define EXC_GUARD_DECODE_GUARD_TARGET(code) \
((uint32_t)(code))
/* EXC_GUARD types */
#define GUARD_TYPE_NONE 0x0
/*
* Mach port guards use the exception codes like this:
*
* code:
* +-----------------------------+----------------+-----------------+
* |[63:61] GUARD_TYPE_MACH_PORT | [60:32] flavor | [31:0] port name|
* +-----------------------------+----------------+-----------------+
*
* subcode:
* +----------------------------------------------------------------+
* |[63:0] guard identifier |
* +----------------------------------------------------------------+
*/
#define GUARD_TYPE_MACH_PORT 0x1 /* guarded mach port */
/*
* File descriptor guards use the exception codes this:
*
* code:
* +-----------------------------+----------------+-----------------+
* |[63:61] GUARD_TYPE_FD | [60:32] flavor | [31:0] fd |
* +-----------------------------+----------------+-----------------+
*
* subcode:
* +----------------------------------------------------------------+
* |[63:0] guard identifier |
* +----------------------------------------------------------------+
*/
#define GUARD_TYPE_FD 0x2 /* guarded file descriptor */
/*
* User generated guards use the exception codes this:
*
* code:
* +-----------------------------+----------------+-----------------+
* |[63:61] GUARD_TYPE_USER | [60:32] unused | [31:0] namespc |
* +-----------------------------+----------------+-----------------+
*
* subcode:
* +----------------------------------------------------------------+
* |[63:0] reason_code |
* +----------------------------------------------------------------+
*/
#define GUARD_TYPE_USER 0x3 /* Userland assertions */
/*
* Vnode guards use the exception codes like this:
*
* code:
* +-----------------------------+----------------+-----------------+
* |[63:61] GUARD_TYPE_VN | [60:32] flavor | [31:0] pid |
* +-----------------------------+----------------+-----------------+
*
* subcode:
* +----------------------------------------------------------------+
* |[63:0] guard identifier |
* +----------------------------------------------------------------+
*/
#define GUARD_TYPE_VN 0x4 /* guarded vnode */
/*
* VM guards use the exception codes like this:
*
* code:
* +-------------------------------+----------------+-----------------+
* |[63:61] GUARD_TYPE_VIRT_MEMORY | [60:32] flavor | [31:0] unused |
* +-------------------------------+----------------+-----------------+
*
* subcode:
* +----------------------------------------------------------------+
* |[63:0] offset |
* +----------------------------------------------------------------+
*/
#define GUARD_TYPE_VIRT_MEMORY 0x5 /* VM operation violating guard */
/*
* Rejected syscalls use the exception codes like this:
*
* code:
* +-------------------------------+----------------+------------------+
* |[63:61] GUARD_TYPE_REJECTED_SC | [60:32] unused | [31:0] mach_trap |
* +-------------------------------+----------------+------------------+
*
* subcode:
* +----------------------------------------------------------------+
* |[63:0] syscall (if mach_trap field is 0), or mach trap number |
* +----------------------------------------------------------------+
*/
#define GUARD_TYPE_REJECTED_SC 0x6 /* rejected system call trap */
#ifdef KERNEL
#define EXC_GUARD_ENCODE_TYPE(code, type) \
((code) |= (((uint64_t)(type) & 0x7ull) << 61))
#define EXC_GUARD_ENCODE_FLAVOR(code, flavor) \
((code) |= (((uint64_t)(flavor) & 0x1fffffffull) << 32))
#define EXC_GUARD_ENCODE_TARGET(code, target) \
((code) |= (((uint64_t)(target) & 0xffffffffull)))
#endif /* KERNEL */
#endif /* _EXC_GUARD_H_ */