public void MacsBug_ScanProcedures()
{
Given_Link(4);
Given_Body(3);
Given_Rts();
Given_Variable_Length_Symbol("my_printf");
Given_ProgramData(0);
var mem = new ByteMemoryArea(Address.Ptr32(0x00100000), w.ToArray());
var scan = new MacsBugSymbolScanner(arch, mem);
var symbols = scan.ScanForSymbols();
Assert.AreEqual(1, symbols.Count);
var sym = symbols[0];
Assert.AreEqual(SymbolType.Procedure, sym.Type);
Assert.AreEqual("my_printf", sym.Name);
Assert.AreEqual(Address.Ptr32(0x00100000), sym.Address);
}
private void Given_BE32_GOT(params uint[] aPointers)
{
var writer = new BeImageWriter();
foreach (var ptr in aPointers)
{
writer.WriteBeUInt32(ptr);
}
var mem = new MemoryArea(Address.Ptr32(0x10000000), writer.ToArray());
program.SegmentMap.AddSegment(mem, ".got", AccessMode.ReadWriteExecute);
arch.Setup(a => a.CreateImageReader(
It.IsNotNull<MemoryArea>(),
mem.BaseAddress))
.Returns(new BeImageReader(mem, 0));
}
private byte[] FlattenSymbolTable()
{
var syms = new BeImageWriter();
foreach (var sym in symbols)
{
syms.WriteBeUInt32(sym.st_name);
syms.WriteBeUInt32(sym.st_value);
syms.WriteBeUInt32(sym.st_size);
syms.WriteByte(sym.st_info);
syms.WriteByte(sym.st_other);
syms.WriteBeUInt16(sym.st_shndx);
}
return(syms.ToArray());
}
private void Given_Code(params uint [] uInstrs)
{
var writer = new BeImageWriter();
foreach (uint uInstr in uInstrs)
{
writer.WriteBeUInt32(uInstr);
}
var mem = new ByteMemoryArea(Address.Ptr64(0x0010_0000), writer.ToArray());
var seg = new ImageSegment("code", mem, AccessMode.ReadWriteExecute);
var segmap = new SegmentMap(mem.BaseAddress, seg);
var program = new Program(segmap, arch, new DefaultPlatform(sc, arch));
var envEmu = new DefaultPlatformEmulator();
emu = (Reko.Arch.PowerPC.PowerPcEmulator)arch.CreateEmulator(segmap, envEmu);
emu.InstructionPointer = program.ImageMap.BaseAddress;
emu.ExceptionRaised += (sender, e) => { throw e.Exception; };
}
protected void BuildObjectFile32()
{
// Add symbol table
if (symbols.Count > 0)
{
Given_Section(".symtab", SectionHeaderType.SHT_SYMTAB, ElfLoader.SHF_ALLOC, FlattenSymbolTable());
var os = objectSections[objectSections.Count - 1];
os.ElementSize = Elf32_Sym.Size;
os.Link = (ushort)objectSections.Count;
Given_Section(".strtab", SectionHeaderType.SHT_STRTAB, ElfLoader.SHF_ALLOC, symbolStringtab.ToArray());
}
var bin = new BeImageWriter();
bin.WriteByte(0x7F);
bin.WriteBytes(new byte[] { 0x45, 0x4C, 0x46 });
bin.WriteByte(1); // 32-bit
bin.WriteByte(2); // big-endian
bin.WriteByte(1); // ELF version
bin.WriteByte(0); // OS ABI
bin.WriteByte(0); // OS version
bin.WriteBytes(0, 7); // pad
// ELF header
bin.WriteBeUInt16(1); // relocatable
bin.WriteBeUInt16((ushort)ElfMachine.EM_SPARC);
bin.WriteBeUInt32(1); // version
bin.WriteBeUInt32(0); // entry point (none in reloc file)
bin.WriteBeUInt32(0); // program segment table offset (none in reloc file)
bin.WriteBeUInt32((uint)bin.Position + 20); // point to section table.
bin.WriteBeUInt32(0); // e_flags;
bin.WriteBeUInt16(0); // e_ehsize;
bin.WriteBeUInt16((ushort)Elf32_PHdr.Size); // e_phentsize;
bin.WriteBeUInt16((ushort)progHeaders.Count); // e_phnum;
bin.WriteBeUInt16(0); // e_shentsize;
bin.WriteBeUInt16((ushort)objectSections.Count); // e_shnum;
bin.WriteBeUInt16(1); // e_shstrndx;
// Build string table.
var strtab = new MemoryStream();
var mpOsToiName = new Dictionary <ObjectSection, int>();
foreach (var os in this.objectSections)
{
mpOsToiName[os] = (int)strtab.Position;
var bytes = Encoding.ASCII.GetBytes(os.Name);
strtab.Write(bytes, 0, bytes.Length);
strtab.WriteByte(0);
}
// Reserve space for program header table and
// section table.
var iProgHdrTable = (uint)bin.Position;
var iShTable = (uint)bin.Position + (uint)(progHeaders.Count * Elf32_PHdr.Size);
var iStrTable = iShTable + (uint)(40 * objectSections.Count);
// Write string table
var aStrtable = strtab.ToArray();
objectSections[1].Content = aStrtable;
var iContent = iStrTable;
// Place remaining sections.
foreach (var section in objectSections.Skip(1))
{
section.Offset = iContent;
iContent = Align((uint)(iContent + section.Content.Length));
}
// Write the program header table
foreach (var ph in this.progHeaders)
{
bin.WriteBeUInt32((uint)ph.Type);
bin.WriteBeUInt32(ph.Offset);
bin.WriteBeUInt32(ph.VirtualAddress);
bin.WriteBeUInt32(0);
bin.WriteBeUInt32((uint)ph.Content.Length);
bin.WriteBeUInt32(ph.AllocateSize);
bin.WriteBeUInt32(ph.Flags);
bin.WriteBeUInt32(ph.Alignment);
}
// Write the section table.
foreach (var os in this.objectSections)
{
bin.WriteBeUInt32((uint)mpOsToiName[os]);
bin.WriteBeUInt32((uint)os.Type);
bin.WriteBeUInt32(os.Flags);
bin.WriteBeUInt32(0);
bin.WriteBeUInt32(os.Offset);
bin.WriteBeUInt32(os.Content != null ? (uint)os.Content.Length : 0u);
bin.WriteBeUInt32(os.Link);
bin.WriteBeUInt32(0);
bin.WriteBeUInt32(0);
bin.WriteBeUInt32(os.ElementSize);
}
// write the non-null sections.
foreach (var section in objectSections.Skip(1))
{
bin.WriteBytes(section.Content);
Align(bin);
}
this.rawBytes = bin.ToArray();
}
