freeldr/freeldr/miscboot.c

   1 /*
   2  *  FreeLoader
   3  *  Copyright (C) 1998-2002  Brian Palmer  <brianp@sginet.com>
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19
  20
  21 #include "freeldr.h"
  22 #include "arch.h"
  23 #include "miscboot.h"
  24 #include "rtl.h"
  25 #include "fs.h"
  26 #include "ui.h"
  27 #include "inifile.h"
  28 #include "disk.h"
  29
  30 VOID LoadAndBootBootSector(PUCHAR OperatingSystemName)
  31 {
  32         PFILE   FilePointer;
  33         UCHAR   SettingName[80];
  34         UCHAR   SettingValue[80];
  35         ULONG   SectionId;
  36         UCHAR   FileName[260];
  37         ULONG   BytesRead;
  38
  39         // Find all the message box settings and run them
  40         ShowMessageBoxesInSection(OperatingSystemName);
  41
  42         // Try to open the operating system section in the .ini file
  43         if (!IniOpenSection(OperatingSystemName, &SectionId))
  44         {
  45                 sprintf(SettingName, "Section [%s] not found in freeldr.ini.\n", OperatingSystemName);
  46                 MessageBox(SettingName);
  47                 return;
  48         }
  49
  50         if (!IniReadSettingByName(SectionId, "BootDrive", SettingValue, 80))
  51         {
  52                 MessageBox("Boot drive not specified for selected OS!");
  53                 return;
  54         }
  55
  56         BootDrive = atoi(SettingValue);
  57
  58         BootPartition = 0;
  59         if (IniReadSettingByName(SectionId, "BootPartition", SettingValue, 80))
  60         {
  61                 BootPartition = atoi(SettingValue);
  62         }
  63
  64         if (!IniReadSettingByName(SectionId, "BootSectorFile", FileName, 260))
  65         {
  66                 MessageBox("Boot sector file not specified for selected OS!");
  67                 return;
  68         }
  69
  70         if (!OpenDiskDrive(BootDrive, BootPartition))
  71         {
  72                 MessageBox("Failed to open boot drive.");
  73                 return;
  74         }
  75
  76         FilePointer = OpenFile(FileName);
  77         if (FilePointer == NULL)
  78         {
  79                 strcat(FileName, " not found.");
  80                 MessageBox(FileName);
  81                 return;
  82         }
  83
  84         // Read boot sector
  85         if (!ReadFile(FilePointer, 512, &BytesRead, (void*)0x7c00) || (BytesRead != 512))
  86         {
  87                 DiskError("Disk read error.");
  88                 return;
  89         }
  90
  91         // Check for validity
  92         if (*((WORD*)(0x7c00 + 0x1fe)) != 0xaa55)
  93         {
  94                 MessageBox("Invalid boot sector magic (0xaa55)");
  95                 return;
  96         }
  97
  98         clrscr();
  99         showcursor();
 100         stop_floppy();
 101         JumpToBootCode();
 102 }
 103
 104 VOID LoadAndBootPartition(PUCHAR OperatingSystemName)
 105 {
 106         UCHAR                                   SettingName[80];
 107         UCHAR                                   SettingValue[80];
 108         ULONG                                   SectionId;
 109         PARTITION_TABLE_ENTRY   PartitionTableEntry;
 110
 111         // Find all the message box settings and run them
 112         ShowMessageBoxesInSection(OperatingSystemName);
 113
 114         // Try to open the operating system section in the .ini file
 115         if (!IniOpenSection(OperatingSystemName, &SectionId))
 116         {
 117                 sprintf(SettingName, "Section [%s] not found in freeldr.ini.\n", OperatingSystemName);
 118                 MessageBox(SettingName);
 119                 return;
 120         }
 121
 122         // Read the boot drive
 123         if (!IniReadSettingByName(SectionId, "BootDrive", SettingValue, 80))
 124         {
 125                 MessageBox("Boot drive not specified for selected OS!");
 126                 return;
 127         }
 128
 129         BootDrive = atoi(SettingValue);
 130
 131         // Read the boot partition
 132         if (!IniReadSettingByName(SectionId, "BootPartition", SettingValue, 80))
 133         {
 134                 MessageBox("Boot partition not specified for selected OS!");
 135                 return;
 136         }
 137
 138         BootPartition = atoi(SettingValue);
 139
 140         // Get the partition table entry
 141         if (!DiskGetPartitionEntry(BootDrive, BootPartition, &PartitionTableEntry))
 142         {
 143                 return;
 144         }
 145
 146         // Now try to read the partition boot sector
 147         // If this fails then abort
 148         if (!DiskReadLogicalSectors(BootDrive, PartitionTableEntry.SectorCountBeforePartition, 1, (PVOID)0x7C00))
 149         {
 150                 return;
 151         }
 152
 153         // Check for validity
 154         if (*((WORD*)(0x7c00 + 0x1fe)) != 0xaa55)
 155         {
 156                 MessageBox("Invalid boot sector magic (0xaa55)");
 157                 return;
 158         }
 159
 160         clrscr();
 161         showcursor();
 162         stop_floppy();
 163         JumpToBootCode();
 164 }
 165
 166 VOID LoadAndBootDrive(PUCHAR OperatingSystemName)
 167 {
 168         UCHAR   SettingName[80];
 169         UCHAR   SettingValue[80];
 170         ULONG   SectionId;
 171
 172         // Find all the message box settings and run them
 173         ShowMessageBoxesInSection(OperatingSystemName);
 174
 175         // Try to open the operating system section in the .ini file
 176         if (!IniOpenSection(OperatingSystemName, &SectionId))
 177         {
 178                 sprintf(SettingName, "Section [%s] not found in freeldr.ini.\n", OperatingSystemName);
 179                 MessageBox(SettingName);
 180                 return;
 181         }
 182
 183         if (!IniReadSettingByName(SectionId, "BootDrive", SettingValue, 80))
 184         {
 185                 MessageBox("Boot drive not specified for selected OS!");
 186                 return;
 187         }
 188
 189         BootDrive = atoi(SettingValue);
 190
 191         // Now try to read the boot sector (or mbr)
 192         // If this fails then abort
 193         if (!DiskReadLogicalSectors(BootDrive, 0, 1, (PVOID)0x7C00))
 194         {
 195                 return;
 196         }
 197
 198         // Check for validity
 199         if (*((WORD*)(0x7c00 + 0x1fe)) != 0xaa55)
 200         {
 201                 MessageBox("Invalid boot sector magic (0xaa55)");
 202                 return;
 203         }
 204
 205         clrscr();
 206         showcursor();
 207         stop_floppy();
 208         JumpToBootCode();
 209 }