// searches the library for unresolved symbols
// the result is true if new symbols were added
private bool searchLibrary(string currFileName)
{
if (AssemblerErrors.ErrorReports.Count > 0)
{
return(false); // don't bother searching if there were errors
}
bool result = false;
using (ArmElfLibReader archive = new ArmElfLibReader(currFileName))
{
IList <ArmFileInfo> newLibMembers = new List <ArmFileInfo>();
bool progress = true;
while (progress)
{
progress = false;
IList <string> defined = new List <string>();
// copy the list of externals so that we can modify it inside the loop
string[] externs = new string[externSymbols.Keys.Count];
externSymbols.Keys.CopyTo(externs, 0);
foreach (string sy in externs)
{
if (globalSymbols.ContainsKey(sy))
{
defined.Add(sy);
continue;
}
string fn;
FileStream member = archive.GetLibraryFile(sy, out fn);
if (member == null)
{
continue;
}
defined.Add(sy);
ArmFileInfo fileInfo = new ObjFileInfo(member, currFileName, fn, globalSymbols, externSymbols);
newLibMembers.Add(fileInfo);
fileInfo.Pass = pass;
fileInfo.StartPass(); // this call might change externSymbols
progress = true;
result = true;
}
foreach (string sy in defined)
{
externSymbols.Remove(sy);
}
}
foreach (ArmFileInfo af in newLibMembers)
{
FileInfoTable.Add(af);
fileList.Add(af.FileName);
}
}
return(result);
}
// perform next pass over the i-th file in the list
private void processFile(int i)
{
string currFileName = fileList[i];
if (currFileName == null)
{
Debug.WriteLine("error? -- missing file name");
return;
}
if (!File.Exists(currFileName))
{
throw new AsmException("Cannot access file " + currFileName);
}
ArmFileInfo fileInfo = FileInfoTable[i];
switch (getSuffix(currFileName))
{
case ".s":
// process ARM assembly language file by invoking the CodeSourcery version
// of Gnu's as program, translating it into a .o file -- then the .o file
// is handled in the same way as any .o file
bool asmOK = true;
if (pass == 1)
{
string objFileName = mapSrcToTempObj(currFileName);
asmOK = runAssembler(currFileName, objFileName);
if (asmOK)
{
fileInfo = new ObjFromAsmFileInfo(objFileName, currFileName,
listing, symTabListing, globalSymbols, externSymbols);
}
else
{
fileInfo = new AsmFileInfo(currFileName, globalSymbols, externSymbols);
}
FileInfoTable[i] = fileInfo;
listing.Clear();
symTabListing.Clear();
}
else
{
fileInfo.ProgramSpace = ap;
}
if (fileInfo.Pass < pass && asmOK)
{
fileInfo.Pass = pass;
fileInfo.StartPass();
}
break;
case ".o": // object code file
case ".o)": // member of a library archive
// process ELF format object code file
if (fileInfo == null)
{
fileInfo = new ObjFileInfo(currFileName, globalSymbols, externSymbols);
FileInfoTable[i] = fileInfo;
}
if (pass == 2)
{
fileInfo.ProgramSpace = ap;
}
if (fileInfo.Pass < pass)
{
fileInfo.Pass = pass;
fileInfo.StartPass();
}
break;
case ".a":
// accept a Gnu format archive file containing ELF object code members
if (fileInfo == null)
{
searchLibrary(currFileName);
}
else
{
throw new AsmException(
"unexpected library file in pass 2: {0}", currFileName);
}
break;
default:
throw new AsmException("unsupported file type ({0})", currFileName);
}
}
// perform next pass over the i-th file in the list
private void processFile(int i)
{
string currFileName = fileList[i];
if (currFileName == null)
{
Debug.WriteLine("error? -- missing file name");
return;
}
// Bill M. was here. We do NOT want to check for the existence of the files here.
// As libraries are scanned the file list increases, and the names of the fuctions
// from the library is added to the filename. Thus, bring in "printf" or something
// and you get "libc.a(printf.o)" which does not exist.
// if (!File.Exists(currFileName))
// throw new AsmException("Cannot access the file named \"" + currFileName + "\"");
ArmFileInfo fileInfo = FileInfoTable[i];
switch (getSuffix(currFileName))
{
case ".s":
// process ARM assembly language file by invoking the CodeSourcery version
// of Gnu's as program, translating it into a .o file -- then the .o file
// is handled in the same way as any .o file
bool asmOK = true;
if (pass == 1)
{
string objFileName = mapSrcToTempObj(currFileName);
asmOK = runAssembler(currFileName, objFileName);
if (asmOK)
{
fileInfo = new ObjFromAsmFileInfo(objFileName, currFileName,
listing, symTabListing, globalSymbols, externSymbols);
}
else
{
fileInfo = new AsmFileInfo(currFileName, globalSymbols, externSymbols);
}
FileInfoTable[i] = fileInfo;
listing.Clear();
symTabListing.Clear();
}
else
{
fileInfo.ProgramSpace = ap;
}
if (fileInfo.Pass < pass && asmOK)
{
fileInfo.Pass = pass;
fileInfo.StartPass();
}
break;
case ".o": // object code file
case ".o)": // member of a library archive
// process ELF format object code file
if (fileInfo == null)
{
fileInfo = new ObjFileInfo(currFileName, globalSymbols, externSymbols);
FileInfoTable[i] = fileInfo;
}
if (pass == 2)
{
fileInfo.ProgramSpace = ap;
}
if (fileInfo.Pass < pass)
{
fileInfo.Pass = pass;
fileInfo.StartPass();
}
break;
case ".a":
// accept a Gnu format archive file containing ELF object code members
if (fileInfo == null)
{
searchLibrary(currFileName);
}
else
{
throw new AsmException(
"unexpected library file in pass 2: {0}", currFileName);
}
break;
default:
throw new AsmException("unsupported file type ({0})", currFileName);
}
}
