1 /* ----------------------------------------------------------------------- * 2 * 3 * Copyright 2009 Pierre-Alexandre Meyer 4 * 5 * This file is part of Syslinux, and is made available under 6 * the terms of the GNU General Public License version 2. 7 * 8 * ----------------------------------------------------------------------- */ 9 10 #include <disk/common.h> 11 #include <disk/geom.h> 12 #include <disk/read.h> 13 #include <stdlib.h> 14 #include <string.h> 15 #include <stdio.h> 16 17 /** 18 * get_mbr_string - return a string describing the boot code 19 * @label: first four bytes of the MBR 20 * @buffer: pre-allocated buffer 21 * @buffer_size: @buffer size 22 **/ 23 void get_mbr_string(const uint32_t label, char *buffer, const int buffer_size) 24 { 25 /* 2 bytes are usually enough to identify the MBR */ 26 uint16_t s_label = label >> 16; 27 28 switch (s_label) { 29 case 0x0000: 30 case 0xfabe: 31 strlcpy(buffer, "No bootloader", buffer_size - 1); 32 break; 33 case 0x0ebe: 34 strlcpy(buffer, "ThinkPad", buffer_size - 1); 35 break; 36 case 0x31c0: 37 strlcpy(buffer, "Acer 3", buffer_size - 1); 38 break; 39 case 0x33c0: 40 /* We need more than 2 bytes */ 41 if (((label >> 8) & 0xff) == 0x8e) 42 strlcpy(buffer, "Windows", buffer_size - 1); 43 else if (((label >> 8) & 0xff) == 0x90) 44 strlcpy(buffer, "DiskCryptor", buffer_size - 1); 45 else if (((label >> 8) & 0xff) == 0xfa) 46 strlcpy(buffer, "Syslinux", buffer_size - 1); 47 else 48 strlcpy(buffer, "Unknown mbr", buffer_size - 1); 49 break; 50 case 0x33ed: 51 strlcpy(buffer, "Syslinux ISOhybrid", buffer_size - 1); 52 break; 53 case 0x33ff: 54 strlcpy(buffer, "HP/Gateway", buffer_size - 1); 55 break; 56 case 0xb800: 57 strlcpy(buffer, "PloP", buffer_size - 1); 58 break; 59 case 0xea05: 60 strlcpy(buffer, "XOSL", buffer_size - 1); 61 break; 62 case 0xea1e: 63 strlcpy(buffer, "Truecrypt Boot Loader", buffer_size - 1); 64 break; 65 case 0xeb04: 66 strlcpy(buffer, "Solaris", buffer_size - 1); 67 break; 68 case 0xeb31: 69 strlcpy(buffer, "Paragon", buffer_size - 1); 70 break; 71 case 0xeb48: 72 strlcpy(buffer, "Grub", buffer_size - 1); 73 break; 74 case 0xeb4c: 75 strlcpy(buffer, "Grub2 (v1.96)", buffer_size - 1); 76 break; 77 case 0xeb63: 78 strlcpy(buffer, "Grub2 (v1.97)", buffer_size - 1); 79 break; 80 case 0xeb5e: 81 /* We need more than 2 bytes */ 82 if (((label >> 8) & 0xff) == 0x00) 83 strlcpy(buffer, "fbinst", buffer_size - 1); 84 else if (((label >> 8) & 0xff) == 0x80) 85 strlcpy(buffer, "Grub4Dos", buffer_size - 1); 86 else if (((label >> 8) & 0xff) == 0x90) 87 strlcpy(buffer, "WEE", buffer_size - 1); 88 else 89 strlcpy(buffer, "Unknown mbr", buffer_size - 1); 90 break; 91 case 0xfa31: 92 /* We need more than 2 bytes */ 93 if (((label >> 8) & 0xff) == 0xc0) 94 strlcpy(buffer, "Syslinux", buffer_size - 1); 95 else if (((label >> 8) & 0xff) == 0xc9) 96 strlcpy(buffer, "Master Boot LoaDeR", buffer_size - 1); 97 else 98 strlcpy(buffer, "Unknown mbr", buffer_size - 1); 99 break; 100 case 0xfa33: 101 strlcpy(buffer, "MS-DOS 3.30 through Windows 95 (A)", buffer_size - 1); 102 break; 103 case 0xfab8: 104 strlcpy(buffer, "FreeDOS (eXtended FDisk)", buffer_size - 1); 105 break; 106 case 0xfaeb: 107 strlcpy(buffer, "Lilo", buffer_size - 1); 108 break; 109 case 0xfc31: 110 strlcpy(buffer, "Testdisk", buffer_size - 1); 111 break; 112 case 0xfc33: 113 strlcpy(buffer, "GAG", buffer_size - 1); 114 break; 115 case 0xfceb: 116 strlcpy(buffer, "BootIT NG", buffer_size - 1); 117 break; 118 default: 119 strlcpy(buffer, "Unknown mbr", buffer_size - 1); 120 break; 121 } 122 123 buffer[buffer_size - 1] = '\0'; 124 } 125 126 /** 127 * get_mbr_id - return the first four bytes of the MBR 128 * @d: driveinfo struct describing the drive 129 **/ 130 uint32_t get_mbr_id(const struct driveinfo *d) 131 { 132 char mbr[SECTOR * sizeof(char)]; 133 134 if (read_mbr(d->disk, &mbr) == -1) 135 return -1; 136 else { 137 uint32_t mbr_id; 138 /* Reverse the opcodes */ 139 mbr_id = (*(uint8_t *) (mbr + 3)); 140 mbr_id += (*(uint8_t *) (mbr + 2) << 8); 141 mbr_id += (*(uint8_t *) (mbr + 1) << 16); 142 mbr_id += (*(uint8_t *) mbr) << 24; 143 return mbr_id; 144 } 145 } 146
