/* * Copyright (c) 2017 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@ */ /* * Header files for the Low Memory Globals (lg) */ #ifndef _LOW_MEMORY_GLOBALS_H_ #define _LOW_MEMORY_GLOBALS_H_ #include <mach/mach_types.h> #include <mach/vm_types.h> #include <mach/machine/vm_types.h> #include <mach/vm_prot.h> #ifndef __arm64__ #error Wrong architecture - this file is meant for arm64 #endif #define LOWGLO_LAYOUT_MAGIC 0xC0DEC0DE /* * This structure is bound to lowmem_vectors.c. Make sure changes here are * reflected there as well. */ #pragma pack(8) /* Make sure the structure stays as we defined it */ typedef struct lowglo { unsigned char lgVerCode[8]; /* 0xffffff8000002000 System verification code */ uint64_t lgZero; /* 0xffffff8000002008 Constant 0 */ uint64_t lgStext; /* 0xffffff8000002010 Start of kernel text */ uint64_t lgVersion; /* 0xffffff8000002018 Pointer to kernel version string */ uint64_t lgOSVersion; /* 0xffffff8000002020 Pointer to OS version string */ uint64_t lgKmodptr; /* 0xffffff8000002028 Pointer to kmod, debugging aid */ uint64_t lgTransOff; /* 0xffffff8000002030 Pointer to kdp_trans_off, debugging aid */ uint64_t lgRebootFlag; /* 0xffffff8000002038 Pointer to debugger reboot trigger */ uint64_t lgManualPktAddr; /* 0xffffff8000002040 Pointer to manual packet structure */ uint64_t lgAltDebugger; /* 0xffffff8000002048 Pointer to reserved space for alternate kernel debugger */ uint64_t lgPmapMemQ; /* 0xffffff8000002050 Pointer to PMAP memory queue */ uint64_t lgPmapMemPageOffset;/* 0xffffff8000002058 Offset of physical page member in vm_page_t or vm_page_with_ppnum_t */ uint64_t lgPmapMemChainOffset;/*0xffffff8000002060 Offset of listq in vm_page_t or vm_page_with_ppnum_t */ uint64_t lgStaticAddr; /* 0xffffff8000002068 Static allocation address */ uint64_t lgStaticSize; /* 0xffffff8000002070 Static allocation size */ uint64_t lgLayoutMajorVersion; /* 0xffffff8000002078 Lowglo major layout version */ uint64_t lgLayoutMagic; /* 0xffffff8000002080 Magic value evaluated to determine if lgLayoutVersion is valid */ uint64_t lgPmapMemStartAddr; /* 0xffffff8000002088 Pointer to start of vm_page_t array */ uint64_t lgPmapMemEndAddr; /* 0xffffff8000002090 Pointer to end of vm_page_t array */ uint64_t lgPmapMemPagesize; /* 0xffffff8000002098 size of vm_page_t */ uint64_t lgPmapMemFromArrayMask; /* 0xffffff80000020A0 Mask to indicate page is from vm_page_t array */ uint64_t lgPmapMemFirstppnum; /* 0xffffff80000020A8 physical page number of the first vm_page_t in the array */ uint64_t lgPmapMemPackedShift; /* 0xffffff80000020B0 alignment of packed pointer */ uint64_t lgPmapMemPackedBaseAddr;/* 0xffffff80000020B8 base address of that packed pointers are relative to */ uint64_t lgLayoutMinorVersion; /* 0xffffff80000020C0 Lowglo minor layout version */ uint64_t lgPageShift; /* 0xffffff80000020C8 number of shifts from page number to size */ } lowglo; #pragma pack() extern lowglo lowGlo; void patch_low_glo(void); void patch_low_glo_static_region(uint64_t address, uint64_t size); void patch_low_glo_vm_page_info(void *, void *, uint32_t); #endif /* _LOW_MEMORY_GLOBALS_H_ */