// no constructor; use static members only
public static void Convert(String input_file_name_1, String input_file_name_2, String output_file_name)
{
System.IO.Stream out_file;
EndianBinaryWriter out_writer;
ObjectFile obj_file_1, obj_file_2;
Boolean second_input_file = (input_file_name_2 == "") ? false : true;
// attempt to open output file for writing
out_file = System.IO.File.Open(output_file_name, System.IO.FileMode.Create);
out_writer = new EndianBinaryWriter(out_file, Endian.LittleEndian);
// note: entrypoint accessible as obj_file_x.EntryPoint
// note: section count accessible as obj_file_x.LoadableSectionCount
// note: section contents accessible as obj_file_x.LoadableSections
if (second_input_file)
{
// attempt to open input files as COFF or ELF
openObjFile(input_file_name_1, out obj_file_1);
openObjFile(input_file_name_2, out obj_file_2);
// write header contents to output file
writeRprcHeader(out_writer, obj_file_1.LoadableSectionCount + obj_file_2.LoadableSectionCount);
// write entrypoint of both applications as "resource" sections to output file
writeEntrypoint(out_writer, obj_file_1.EntryPoint);
writeEntrypoint(out_writer, obj_file_2.EntryPoint);
// write section contents to output file
foreach (ObjectSection section in obj_file_1.LoadableSections)
writeSection(out_writer, section, obj_file_1.secRead(section));
foreach (ObjectSection section in obj_file_2.LoadableSections)
{
writeSection(out_writer, section, obj_file_2.secRead(section));
// warn if section collides with another section from first application
if (sectionOverlap(section, obj_file_1.LoadableSections))
Console.WriteLine("Warning: section in file " + input_file_name_2 +
" starting at 0x" + section.loadAddr.ToString("x8") +
" overlaps with one or more sections in file " + input_file_name_1 + ".");
}
// close input files
obj_file_1.Close();
obj_file_2.Close();
}
else
{
// attempt to open input file as COFF or ELF
openObjFile(input_file_name_1, out obj_file_1);
// write header contents to output file
writeRprcHeader(out_writer, obj_file_1.LoadableSectionCount);
// write entrypoint of first application as "resource" section to output file
writeEntrypoint(out_writer, obj_file_1.EntryPoint);
// write section contents to output file
foreach (ObjectSection section in obj_file_1.LoadableSections)
writeSection(out_writer, section, obj_file_1.secRead(section));
// close input file
obj_file_1.Close();
}
// close output file
out_writer.Close();
}
private static void writeRprcHeader(EndianBinaryWriter writer, uint section_count)
{
// RPRC header contents:
// char magic[4] = { 'R', 'P', 'R', 'C' };
// u32 version;
// u32 header_len;
// char header[...] = { header_len bytes of unformatted, textual header };
char[] magic = {'R', 'P', 'R', 'C'};
uint version = 1; // TODO: confirm with SDO
// use text header to record section count
uint length = 4;
uint header = section_count;
// TODO: add more text header contents?
// write header to file
writer.Write(magic);
writer.Write(version);
writer.Write(length);
writer.Write(header);
}
private static void writeSection(EndianBinaryWriter writer, ObjectSection section, byte[] contents)
{
// RPRC section contents:
// u32 type;
// u64 da;
// u32 len;
// u8 content[...] = { len bytes of binary data };
uint type = 1; // 1: TEXT, 2: DATA (TODO use both?)
ulong addr = section.loadAddr;
uint size = (uint)section.size;
// write section to file
writer.Write(type);
writer.Write(addr);
writer.Write(size);
writer.Write(contents);
}
private static void writeEntrypoint(EndianBinaryWriter writer, ulong entrypoint)
{
// RPRC section contents:
// u32 type;
// u64 da;
// u32 len;
// u8 content[...] = { len bytes of binary data };
// RPRC resource contents (inside section contents):
// u32 type;
// u64 da;
// u32 len;
// u32 reserved;
// u8 name[48];
uint section_type = 0; // 0: RESOURCE
ulong section_addr = entrypoint;
uint section_size = 4 + 8 + 4 + 4 + 48;
uint resource_type = 5; // 5: RSC_BOOTADDR
ulong resource_addr = entrypoint;
uint resource_size = 48;
uint resource_rsvd = 0;
char[] resource_name = newResourceName("Entrypoint");
// write section + resource to file
writer.Write(section_type);
writer.Write(section_addr);
writer.Write(section_size);
writer.Write(resource_type);
writer.Write(resource_addr);
writer.Write(resource_size);
writer.Write(resource_rsvd);
writer.Write(resource_name);
}
