bool ElfReader::LoadSymbols()
{
bool hasSymbols = false;
SectionID sec = GetSectionByName(".symtab");
if (sec != -1)
{
int stringSection = sections[sec].sh_link;
const char* stringBase = (const char*)GetSectionDataPtr(stringSection);
// We have a symbol table!
Elf32_Sym* symtab = (Elf32_Sym*)(GetSectionDataPtr(sec));
int numSymbols = sections[sec].sh_size / sizeof(Elf32_Sym);
for (int sym = 0; sym < numSymbols; sym++)
{
int size = Common::swap32(symtab[sym].st_size);
if (size == 0)
continue;
// int bind = symtab[sym].st_info >> 4;
int type = symtab[sym].st_info & 0xF;
int sectionIndex = Common::swap16(symtab[sym].st_shndx);
int value = Common::swap32(symtab[sym].st_value);
const char* name = stringBase + Common::swap32(symtab[sym].st_name);
if (bRelocate)
value += sectionAddrs[sectionIndex];
int symtype = Symbol::SYMBOL_DATA;
switch (type)
{
case STT_OBJECT:
symtype = Symbol::SYMBOL_DATA;
break;
case STT_FUNC:
symtype = Symbol::SYMBOL_FUNCTION;
break;
default:
continue;
}
g_symbolDB.AddKnownSymbol(value, size, name, symtype);
hasSymbols = true;
}
}
g_symbolDB.Index();
return hasSymbols;
}
const char *ElfReader::GetSectionName(int section) const
{
if (sections[section].sh_type == SHT_NULL)
return NULL;
int nameOffset = sections[section].sh_name;
char *ptr = (char*)GetSectionDataPtr(header->e_shstrndx);
if (ptr)
return ptr + nameOffset;
else
return NULL;
}