LineageOS/android_external_gptfdisk
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Initial commit of support for moving main partition table to arbitrary

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location on disk (within limits based on existing partitions).
This commit is contained in:
Rod Smith
2017-07-21 21:48:13 -04:00
parent e7452642ac
commit 503e9ada12
10 changed files with 123 additions and 10 deletions
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25
gpttext.cc
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@@ -132,7 +132,7 @@ int GPTDataTextUI::XFormDisklabel(void) {
numDone = GPTData::XFormDisklabel(partNum);
return numDone;
} // GPTData::XFormDisklabel(void)
} // GPTDataTextUI::XFormDisklabel(void)
/*********************************************************************
@@ -179,6 +179,24 @@ void GPTDataTextUI::ResizePartitionTable(void) {
SetGPTSize(newSize);
} // GPTDataTextUI::ResizePartitionTable()
// Move the main partition table (to enable some SoC boot loaders to place
// code at sector 2, for instance).
void GPTDataTextUI::MoveMainTable(void) {
uint64_t newStart, pteSize = GetTableSizeInSectors();
uint64_t maxValue = FindFirstUsedLBA() - pteSize;
ostringstream prompt;
cout << "Currently, main partition table begins at sector " << mainHeader.partitionEntriesLBA
<< " and ends at sector " << mainHeader.partitionEntriesLBA + pteSize - 1 << "\n";
prompt << "Enter new starting location (2 to " << maxValue << "; default is 2; 1 to abort): ";
newStart = GetNumber(1, maxValue, 2, prompt.str());
if (newStart != 1) {
GPTData::MoveMainTable(newStart);
} else {
cout << "Aborting change!\n";
} // if
} // GPTDataTextUI::MoveMainTable()
// Interactively create a partition
void GPTDataTextUI::CreatePartition(void) {
uint64_t firstBlock, firstInLargest, lastBlock, sector, origSector;
@@ -811,6 +829,9 @@ void GPTDataTextUI::ExpertsMenu(string filename) {
case 'i': case 'I':
ShowDetails();
break;
case 'j': case 'J':
MoveMainTable();
break;
case 'l': case 'L':
prompt.seekp(0);
prompt << "Enter the sector alignment value (1-" << MAX_ALIGNMENT << ", default = "
@@ -878,9 +899,11 @@ void GPTDataTextUI::ShowExpertCommands(void) {
cout << "c\tchange partition GUID\n";
cout << "d\tdisplay the sector alignment value\n";
cout << "e\trelocate backup data structures to the end of the disk\n";
cout << "f\trandomize disk and partition unique GUIDs\n";
cout << "g\tchange disk GUID\n";
cout << "h\trecompute CHS values in protective/hybrid MBR\n";
cout << "i\tshow detailed information on a partition\n";
cout << "j\tmove the main partition table\n";
cout << "l\tset the sector alignment value\n";
cout << "m\treturn to main menu\n";
cout << "n\tcreate a new protective MBR\n";