/// <summary>
/// A function to extract the debug_info and store it for future reference
/// </summary>
/// <param name="nmPath"></param>
/// <param name="elfPath"></param>
public void Run(string readElfPath, string elfPath)
{
string result = "";
if (elfPath == "" || readElfPath == "")
{
return;
}
ProcessAdapter.Execute(ref result, readElfPath, "--debug-dump=info " + Quote(elfPath));
string[] lines = result.Split(new[] { '\r', '\n' });
DwarfInfo = lines.ToList();
CompilationUnits = new List <string[]>();
// Select the index of all lines that contain the compilation unit tag
var ci = DwarfInfo.Select((s, i) => new { s, i }).Where(x => x.s.Contains(COMPILE_UNIT)).Select(x => x.i).ToList();
ci.Add(DwarfInfo.Count - 1); // last index
for (int i = 0; i < ci.Count - 1; i++)
{
CompilationUnits.Add(DwarfInfo.GetRange(ci[i], ci[i + 1] - ci[i]).ToArray());
}
// test
//FindSymbolCUnit("gRecipeFwd", Convert.ToUInt32("1074", 16));
//FindSubRoutineCUnit("vSPIM_Task", Convert.ToUInt32("4ecc", 16));
//FindSubRoutineCUnit("gRecipeFwd", Convert.ToUInt32("1075", 16));
}
/// <summary>
/// Input the search path for .o files. We extract all the resolved symbols inside each .o file and store them for future reference
/// </summary>
/// <param name="nmPath"></param>
/// <param name="objSearchPaths"></param>
public void GatherStaticSyms(string nmPath, string[] objSearchPaths)
{
string result = "";
UnresolvedSymols = new List <Symbol>();
// 1. Extract all the object files from the various directories
// Note select() doesnt execute the where() filter, but selectmany works!
var objs = objSearchPaths.SelectMany(x => Directory.GetFiles(x).Where(y =>
{
if ((Path.GetExtension(y).ToLower() == ".o" || Path.GetExtension(y).ToLower() == ".obj"))
{
return(true);
}
else
{
return(false);
}
}));
// 2. Run NM on them and get their symbols
foreach (var obj in objs)
{
ProcessAdapter.Execute(ref result, nmPath, "--print-size --size-sort " + Quote(obj.ToString()));
string[] symTable = result.Split(new[] { '\r', '\n' });
string secName = "unknown";
foreach (string line in symTable)
{
string[] entries = line.Split(new char[0], StringSplitOptions.RemoveEmptyEntries);
if (entries.Length < 3)
{
continue;
}
// We are only interested in local symbols -> lower case stuff except for C
// https://sourceware.org/binutils/docs/binutils/nm.html
if (entries[2] == "t")
{
secName = SEC_NAME_TEXT;
}
else if (Regex.IsMatch(entries[2], @"[dg]"))
{
secName = SEC_NAME_DATA;
}
else if (Regex.IsMatch(entries[2], @"[bCs]"))
{
secName = SEC_NAME_BSS;
}
else
{
continue;
}
Symbol sym = new Symbol(entries[3], obj.ToString(), Convert.ToUInt32(entries[0], 16), Convert.ToUInt32(entries[1], 16), secName); sym.GlobalScope = Symbol.TYPE_STATIC;
UnresolvedSymols.Add(sym);
}
}
}
public void Run(string nmPath, string elfPath)
{
string result = "";
Symbols = new List <Symbol>();
if (elfPath == "")
{
return;
}
ProcessAdapter.Execute(ref result, nmPath, "--demangle --print-size --size-sort " + Quote(elfPath)); //--line-numbers
// Parse the resultant table
// 00800744 00000004 b LoaderIPMode --> b means static BSS symbol, B beans global BSS symbol, same for d/D data
// 00006364 00000018 T vTaskSuspendAll /cygdrive/d/Freelance/Study/FTDI/VFWLoaderDemo/lib/FreeRTOS/Source/tasks.c:1632
string[] symTable = result.Split(new[] { '\r', '\n' });
foreach (string line in symTable)
{
// Split using spaces - note that the module path may itself contain spaces
string[] entries = line.Split(new char[0], 4, StringSplitOptions.RemoveEmptyEntries);
if (entries.Length < 4)
{
continue;
}
string path = "";
int type = Symbol.TYPE_STATIC;
string secName = "unknown";
// Extract the module path, we also take into account paths with spaces in between
if (entries[3] == "_setlocale_r")
{
Debug.Write("_setlocale_r");
}
entries[3] = entries[3].TrimEnd(' '); // trim spaces from the end of function name
if (UseDWARF)
{
// Extract module path from DARF info
if (entries[2].ToLower() == "t")
{
// Subroutines
path = DwarfParser.Instance.FindSubRoutineCUnit(entries[3], Convert.ToUInt32(entries[0], 16));
}
else if (entries[2].ToLower() == "w") // Weak symbols could be either vars or subroutines
{
Debug.WriteLine("Found a weak symbol " + entries[3]);
path = DwarfParser.Instance.FindSubRoutineCUnit(entries[3], Convert.ToUInt32(entries[0], 16));
if (path != String.Empty)
{
Debug.WriteLine("Is a subroutine " + path);
}
else
{
path = DwarfParser.Instance.FindSymbolCUnit(entries[3], Convert.ToUInt32(entries[0], 16) & (~RAM_ADDRESS_MASK));
if (path != String.Empty)
{
Debug.WriteLine("Is a variable " + path);
// FIXME: for now just assume all weak variable syms are in BSS
entries[2] = "b";
}
}
}
else
{
// variables
path = DwarfParser.Instance.FindSymbolCUnit(entries[3], Convert.ToUInt32(entries[0], 16) & (~RAM_ADDRESS_MASK));
}
}
else
{
if (entries.Length > 4)
{
int end = line.IndexOf(':');
int j = 0;
for (int i = 0; i < line.Length; i++)
{
// Find the index of 4th space
if (line[i] == ' ' || line[i] == '\t')
{
j++;
if (j == 4)
{
j = i + 1; break;
}
}
}
path = line.Substring(j, end - j);
}
}
if (Regex.IsMatch(entries[2], @"[TDBGSR]"))
{
type = Symbol.TYPE_GLOBAL;
}
// Get the section
if (entries[2].ToLower() == "t")
{
secName = SEC_NAME_TEXT;
}
if (entries[2].ToLower() == "d" || entries[2].ToLower() == "g" || entries[2].ToLower() == "r")
{
secName = SEC_NAME_DATA;
}
if (entries[2].ToLower() == "b" || entries[2].ToLower() == "s" || entries[2].ToLower() == "c")
{
secName = SEC_NAME_BSS;
}
Symbol sym = new Symbol(entries[3], path, Convert.ToUInt32(entries[0], 16), Convert.ToUInt32(entries[1], 16), secName); sym.GlobalScope = type;
Symbols.Add(sym);
}
}
