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| Source at commit 1406 created 12 years 10 months ago. By meklort, Revert drivers.c so that kexts are only loaded when OSBundleRequired is set and that value is not safe mode. Added some comments about it too. | |
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| 1 | /*␊ |
| 2 | * Copyright (c) 2011 Evan Lojewski. All rights reserved.␊ |
| 3 | *␊ |
| 4 | */␊ |
| 5 | #include <GUIDPartition.hpp>␊ |
| 6 | #include <Disk.hpp>␊ |
| 7 | ␊ |
| 8 | ␊ |
| 9 | GUIDPartition::GUIDPartition(Disk* disk, UInt8 partitionNumber) : Partition(disk, partitionNumber)␊ |
| 10 | {␊ |
| 11 | UInt32 entrySize = 0;␊ |
| 12 | ␊ |
| 13 | mDisk = disk;␊ |
| 14 | mNumSectors = 0;␊ |
| 15 | mBeginSector = 0;␊ |
| 16 | mPartitionNumber = partitionNumber;␊ |
| 17 | mNumPartitions = 0;␊ |
| 18 | ␊ |
| 19 | if(mDisk)␊ |
| 20 | {␊ |
| 21 | // read in lba1, this contains the partition map if it's GPT␊ |
| 22 | mDisk->Read(1, 1, mLBABUffer);␊ |
| 23 | mGPTHeader = (GPTHeader*)mLBABUffer;␊ |
| 24 | entrySize = mGPTHeader->hdr_entsz;␊ |
| 25 | ␊ |
| 26 | }␊ |
| 27 | else␊ |
| 28 | {␊ |
| 29 | mGPTHeader = NULL;␊ |
| 30 | }␊ |
| 31 | ␊ |
| 32 | if(isGPTDisk())␊ |
| 33 | {␊ |
| 34 | mNumPartitions = mGPTHeader->hdr_entries;␊ |
| 35 | }␊ |
| 36 | ␊ |
| 37 | mGPTHeader = NULL;␊ |
| 38 | ␊ |
| 39 | if(entrySize && mPartitionNumber >= 0 && mPartitionNumber < mNumPartitions)␊ |
| 40 | {␊ |
| 41 | mDisk->Read(2 + (mPartitionNumber / 4), 1, mLBABUffer);␊ |
| 42 | ␊ |
| 43 | UInt32 offset = (mPartitionNumber % 4) * entrySize;␊ |
| 44 | ␊ |
| 45 | mGPTEntry = (GPTEntry*) mLBABUffer + offset;␊ |
| 46 | ␊ |
| 47 | // TODO: verify partition type != NULL␊ |
| 48 | ␊ |
| 49 | mNumSectors = (mGPTEntry->ent_lba_end - mGPTEntry->ent_lba_start) + 1;␊ |
| 50 | mBeginSector = mGPTEntry->ent_lba_start;␊ |
| 51 | //mUUID = mGPTEntry->ent_uuid;␊ |
| 52 | } ␊ |
| 53 | }␊ |
| 54 | ␊ |
| 55 | GUIDPartition::~GUIDPartition()␊ |
| 56 | {␊ |
| 57 | ␊ |
| 58 | }␊ |
| 59 | ␊ |
| 60 | ␊ |
| 61 | bool GUIDPartition::isGPTDisk()␊ |
| 62 | {␊ |
| 63 | static bool status = false;␊ |
| 64 | ␊ |
| 65 | if(status) return status;␊ |
| 66 | ␊ |
| 67 | if(!mGPTHeader) return false;␊ |
| 68 | ␊ |
| 69 | if(mGPTHeader->hdr_sig[0] == 'E' &&␊ |
| 70 | mGPTHeader->hdr_sig[1] == 'F' &&␊ |
| 71 | mGPTHeader->hdr_sig[2] == 'I' &&␊ |
| 72 | mGPTHeader->hdr_sig[3] == ' ' &&␊ |
| 73 | mGPTHeader->hdr_sig[4] == 'P' &&␊ |
| 74 | mGPTHeader->hdr_sig[5] == 'A' &&␊ |
| 75 | mGPTHeader->hdr_sig[6] == 'R' &&␊ |
| 76 | mGPTHeader->hdr_sig[7] == 'T') return true;␊ |
| 77 | ␊ |
| 78 | return false;␊ |
| 79 | }␊ |
| 80 | |
