64 lines
2.4 KiB
C
64 lines
2.4 KiB
C
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/*
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* Copyright (c) 2021-2022 Apple Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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#ifndef _SYS_PREOSLOG_H_
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#define _SYS_PREOSLOG_H_
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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#define PREOSLOG_MAGIC 'LSOP'
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#define PREOSLOG_SYSCTL "kern.preoslog"
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typedef uint8_t preoslog_source_t;
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enum {
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PREOSLOG_SOURCE_IBOOT = 0,
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PREOSLOG_SOURCE_MACEFI,
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PREOSLOG_SOURCE_MAX
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};
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/*
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* Any change to this structure must be reflected in boot loader (iboot / xnu SDK header) and vice versa.
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* Beware: if you remove __attribute__((packed)) here, then sizeof() on this structure will return 16.
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* However, with or without __attribute__((packed)), offset_of(preoslog_header_t, data) will always return 14.
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*/
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typedef struct __attribute__((packed)) {
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uint32_t magic; /* PREOGLOS_MAGIC if valid */
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uint32_t size; /* Size of the preoslog buffer including the header */
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uint32_t offset; /* Write pointer. Indicates where in the buffer new log entry would go */
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preoslog_source_t source; /* Indicates who filled in the buffer (e.g. iboot vs MacEFI) */
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uint8_t wrapped; /* If equal to 1, the preoslog ring buffer wrapped at least once */
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char data[]; /* log buffer */
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} preoslog_header_t;
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__END_DECLS
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#endif /* !_SYS_PREOSLOG_H_ */
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