tools/elf4rom/src/dwarfarangesmanager.cpp
changeset 34 92d87f2e53c2
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/elf4rom/src/dwarfarangesmanager.cpp	Fri Jan 15 09:07:44 2010 +0000
@@ -0,0 +1,94 @@
+/*
+* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+*
+* This program is free software: you can redistribute it and/or modify
+* it under the terms of the GNU Lesser General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU Lesser General Public License for more details.
+* 
+* You should have received a copy of the GNU Lesser General Public License
+* along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <iostream>
+#include "dwarfmanager.h"
+#include "inputfile.h"
+
+const string DwarfArangesManager::iArangesSectionName(".debug_aranges");
+
+void DwarfArangesManager::ProcessSection(FileShdrPair & aPair, Dwarf_Byte_Ptr start, Dwarf_Byte_Ptr end){
+	while (start < end){
+		Dwarf_Byte_Ptr data = start;		
+		size_t offset_size, initial_length_size;
+		
+		Dwarf_Word length = READ_UNALIGNED4(data); 
+		data += 4;
+
+		if (length >= 0xfffffff0u) {
+			cerr << "Error: 64 bit DWARF not supported\n";
+			exit(EXIT_FAILURE);
+		} else {	
+			offset_size = 4;
+			initial_length_size = 4;
+		}
+		
+		start += length + initial_length_size;
+
+		Dwarf_Half version = READ_UNALIGNED2(data);
+		data += 2;
+
+		Dwarf_Word offset = GetValue(data, offset_size); 
+		Dwarf_Word newOffset = CheckNewOffset(iDwarfInfoManager.GetSectionOffset(aPair.iXIPFileDetails.iElfFile), offset);
+		if (offset != newOffset)
+			WriteValue(data, offset, offset_size);
+		data += offset_size;
+
+
+		size_t pointer_size = *data++;
+
+		size_t segment_size = *data++;
+		
+		if (version != 2 && version != 3){
+			static bool warned = false;
+			if (!warned){
+				cerr << "Only DWARF 2 and 3 aranges are currently supported\n";
+				warned = true;
+			}
+			continue;
+		}
+
+		size_t address_size = pointer_size + segment_size;
+
+		if (address_size > 4){
+			static bool warned2 = false;
+			if (!warned2){
+				cerr << "64 bit DWARF not currently supported\n";
+				warned2 = true;
+			}
+			continue;		
+		}
+
+		Dwarf_Byte_Ptr ranges = data;
+
+		/* Must pad to an alignment boundary that is twice the address size.  */
+		size_t excess = (data - start) % (2 * address_size);
+		if (excess)
+			ranges += (2 * address_size) - excess;
+
+		while (ranges + 2 * address_size <= start){
+			LinearAddr addr = GetValue(ranges, address_size);
+			LinearAddr relocatedAddress = aPair.iXIPFileDetails.Relocate(addr);
+			if (addr != relocatedAddress)
+				WriteValue(ranges, relocatedAddress, address_size);
+			ranges += address_size;
+			// skip length field
+			ranges += address_size;
+		}
+	}
+}