1*043036a2SApple OSS Distributions /* 2*043036a2SApple OSS Distributions * Copyright (c) 2021-2022 Apple Inc. All rights reserved. 3*043036a2SApple OSS Distributions * 4*043036a2SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5*043036a2SApple OSS Distributions * 6*043036a2SApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code 7*043036a2SApple OSS Distributions * as defined in and that are subject to the Apple Public Source License 8*043036a2SApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in 9*043036a2SApple OSS Distributions * compliance with the License. The rights granted to you under the License 10*043036a2SApple OSS Distributions * may not be used to create, or enable the creation or redistribution of, 11*043036a2SApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to 12*043036a2SApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any 13*043036a2SApple OSS Distributions * terms of an Apple operating system software license agreement. 14*043036a2SApple OSS Distributions * 15*043036a2SApple OSS Distributions * Please obtain a copy of the License at 16*043036a2SApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file. 17*043036a2SApple OSS Distributions * 18*043036a2SApple OSS Distributions * The Original Code and all software distributed under the License are 19*043036a2SApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20*043036a2SApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21*043036a2SApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22*043036a2SApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23*043036a2SApple OSS Distributions * Please see the License for the specific language governing rights and 24*043036a2SApple OSS Distributions * limitations under the License. 25*043036a2SApple OSS Distributions * 26*043036a2SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27*043036a2SApple OSS Distributions */ 28*043036a2SApple OSS Distributions 29*043036a2SApple OSS Distributions #ifndef _SYS_PREOSLOG_H_ 30*043036a2SApple OSS Distributions #define _SYS_PREOSLOG_H_ 31*043036a2SApple OSS Distributions 32*043036a2SApple OSS Distributions #include <sys/cdefs.h> 33*043036a2SApple OSS Distributions 34*043036a2SApple OSS Distributions __BEGIN_DECLS 35*043036a2SApple OSS Distributions 36*043036a2SApple OSS Distributions #define PREOSLOG_MAGIC 'LSOP' 37*043036a2SApple OSS Distributions #define PREOSLOG_SYSCTL "kern.preoslog" 38*043036a2SApple OSS Distributions 39*043036a2SApple OSS Distributions typedef uint8_t preoslog_source_t; 40*043036a2SApple OSS Distributions enum { 41*043036a2SApple OSS Distributions PREOSLOG_SOURCE_IBOOT = 0, 42*043036a2SApple OSS Distributions PREOSLOG_SOURCE_MACEFI, 43*043036a2SApple OSS Distributions PREOSLOG_SOURCE_MAX 44*043036a2SApple OSS Distributions }; 45*043036a2SApple OSS Distributions 46*043036a2SApple OSS Distributions /* 47*043036a2SApple OSS Distributions * Any change to this structure must be reflected in boot loader (iboot / xnu SDK header) and vice versa. 48*043036a2SApple OSS Distributions * Beware: if you remove __attribute__((packed)) here, then sizeof() on this structure will return 16. 49*043036a2SApple OSS Distributions * However, with or without __attribute__((packed)), offset_of(preoslog_header_t, data) will always return 14. 50*043036a2SApple OSS Distributions */ 51*043036a2SApple OSS Distributions 52*043036a2SApple OSS Distributions typedef struct __attribute__((packed)) { 53*043036a2SApple OSS Distributions uint32_t magic; /* PREOGLOS_MAGIC if valid */ 54*043036a2SApple OSS Distributions uint32_t size; /* Size of the preoslog buffer including the header */ 55*043036a2SApple OSS Distributions uint32_t offset; /* Write pointer. Indicates where in the buffer new log entry would go */ 56*043036a2SApple OSS Distributions preoslog_source_t source; /* Indicates who filled in the buffer (e.g. iboot vs MacEFI) */ 57*043036a2SApple OSS Distributions uint8_t wrapped; /* If equal to 1, the preoslog ring buffer wrapped at least once */ 58*043036a2SApple OSS Distributions char data[]; /* log buffer */ 59*043036a2SApple OSS Distributions } preoslog_header_t; 60*043036a2SApple OSS Distributions 61*043036a2SApple OSS Distributions __END_DECLS 62*043036a2SApple OSS Distributions 63*043036a2SApple OSS Distributions #endif /* !_SYS_PREOSLOG_H_ */ 64