rpcs3/rpcs3/Loader/ELF32.cpp
Nekotekina c48168ffc7 SPU ELF loading
I'm not sure that it's correct way to get entry point
2013-11-29 19:27:10 +04:00

278 lines
No EOL
5.5 KiB
C++

#include "stdafx.h"
#include "ELF32.h"
ELF32Loader::ELF32Loader(vfsStream& f)
: elf32_f(f)
, LoaderBase()
{
}
bool ELF32Loader::LoadInfo()
{
if(!elf32_f.IsOpened()) return false;
if(!LoadEhdrInfo()) return false;
if(!LoadPhdrInfo()) return false;
if(!LoadShdrInfo()) return false;
return true;
}
bool ELF32Loader::LoadData(u64 offset)
{
if(!elf32_f.IsOpened()) return false;
if(!LoadEhdrData(offset)) return false;
if(!LoadPhdrData(offset)) return false;
if(!LoadShdrData(offset)) return false;
return true;
}
bool ELF32Loader::Close()
{
return elf32_f.Close();
}
bool ELF32Loader::LoadEhdrInfo()
{
elf32_f.Seek(0);
ehdr.Load(elf32_f);
if(!ehdr.CheckMagic()) return false;
if(ehdr.IsLittleEndian())
ConLog.Warning("ELF32 LE");
switch(ehdr.e_machine)
{
case MACHINE_MIPS:
case MACHINE_PPC64:
case MACHINE_SPU:
case MACHINE_ARM:
machine = (Elf_Machine)ehdr.e_machine;
break;
default:
machine = MACHINE_Unknown;
ConLog.Error("Unknown elf32 machine: 0x%x", ehdr.e_machine);
return false;
}
entry = ehdr.GetEntry();
if(entry == 0)
{
ConLog.Error("elf32 error: entry is null!");
return false;
}
return true;
}
bool ELF32Loader::LoadPhdrInfo()
{
if(ehdr.e_phoff == 0 && ehdr.e_phnum)
{
ConLog.Error("LoadPhdr32 error: Program header offset is null!");
return false;
}
elf32_f.Seek(ehdr.e_phoff);
for(uint i=0; i<ehdr.e_phnum; ++i)
{
Elf32_Phdr* phdr = new Elf32_Phdr();
if(ehdr.IsLittleEndian()) phdr->LoadLE(elf32_f);
else phdr->Load(elf32_f);
phdr_arr.Move(phdr);
}
if(/*!Memory.IsGoodAddr(entry)*/ entry & 0x1)
{
//entry is physical, convert to virtual
entry &= ~0x1;
for(size_t i=0; i<phdr_arr.GetCount(); ++i)
{
if(phdr_arr[i].p_paddr >= entry && entry < phdr_arr[i].p_paddr + phdr_arr[i].p_memsz)
{
entry += phdr_arr[i].p_vaddr;
ConLog.Warning("virtual entry = 0x%x", entry);
break;
}
}
}
return true;
}
bool ELF32Loader::LoadShdrInfo()
{
elf32_f.Seek(ehdr.e_shoff);
for(u32 i=0; i<ehdr.e_shnum; ++i)
{
Elf32_Shdr* shdr = new Elf32_Shdr();
if(ehdr.IsLittleEndian()) shdr->LoadLE(elf32_f);
else shdr->Load(elf32_f);
shdr_arr.Move(shdr);
}
if(ehdr.e_shstrndx >= shdr_arr.GetCount())
{
ConLog.Error("LoadShdr32 error: shstrndx too big!");
return false;
}
for(u32 i=0; i<shdr_arr.GetCount(); ++i)
{
elf32_f.Seek(shdr_arr[ehdr.e_shstrndx].sh_offset + shdr_arr[i].sh_name);
wxString name = wxEmptyString;
while(!elf32_f.Eof())
{
char c;
elf32_f.Read(&c, 1);
if(c == 0) break;
name += c;
}
shdr_name_arr.Add(name);
if(name == ".text") //temporary solution for SPU ELF loading
_text_section_offset = shdr_arr[i].sh_offset;
}
return true;
}
bool ELF32Loader::LoadEhdrData(u64 offset)
{
#ifdef LOADER_DEBUG
ConLog.SkipLn();
ehdr.Show();
ConLog.SkipLn();
#endif
return true;
}
bool ELF32Loader::LoadPhdrData(u64 _offset)
{
const u64 offset = machine == MACHINE_SPU ? _offset : 0;
for(u32 i=0; i<phdr_arr.GetCount(); ++i)
{
phdr_arr[i].Show();
if(phdr_arr[i].p_type == 0x00000001) //LOAD
{
if(phdr_arr[i].p_vaddr < min_addr)
{
min_addr = phdr_arr[i].p_vaddr;
}
if(phdr_arr[i].p_vaddr + phdr_arr[i].p_memsz > max_addr)
{
max_addr = phdr_arr[i].p_vaddr + phdr_arr[i].p_memsz;
}
if(phdr_arr[i].p_vaddr != phdr_arr[i].p_paddr)
{
ConLog.Warning
(
"LoadPhdr32 different load addrs: paddr=0x%8.8x, vaddr=0x%8.8x",
phdr_arr[i].p_paddr, phdr_arr[i].p_vaddr
);
}
switch(machine)
{
case MACHINE_SPU: Memory.MainMem.Alloc(phdr_arr[i].p_vaddr + offset, phdr_arr[i].p_memsz); break;
case MACHINE_MIPS: Memory.PSPMemory.RAM.Alloc(phdr_arr[i].p_vaddr + offset, phdr_arr[i].p_memsz); break;
case MACHINE_ARM: Memory.PSVMemory.RAM.Alloc(phdr_arr[i].p_vaddr + offset, phdr_arr[i].p_memsz); break;
default:
continue;
}
elf32_f.Seek(phdr_arr[i].p_offset);
elf32_f.Read(&Memory[phdr_arr[i].p_vaddr + offset], phdr_arr[i].p_filesz);
}
else if(phdr_arr[i].p_type == 0x00000004)
{
elf32_f.Seek(phdr_arr[i].p_offset);
Elf32_Note note;
if(ehdr.IsLittleEndian()) note.LoadLE(elf32_f);
else note.Load(elf32_f);
if(note.type != 1)
{
ConLog.Error("ELF32: Bad NOTE type (%d)", note.type);
break;
}
if(note.namesz != sizeof(note.name))
{
ConLog.Error("ELF32: Bad NOTE namesz (%d)", note.namesz);
break;
}
if(note.descsz != sizeof(note.desc) && note.descsz != 32)
{
ConLog.Error("ELF32: Bad NOTE descsz (%d)", note.descsz);
break;
}
//if(note.desc.flags)
//{
// ConLog.Error("ELF32: Bad NOTE flags (0x%x)", note.desc.flags);
// break;
//}
if(note.descsz == sizeof(note.desc))
{
ConLog.Warning("name = %s", note.name);
ConLog.Warning("ls_size = %d", note.desc.ls_size);
ConLog.Warning("stack_size = %d", note.desc.stack_size);
}
else
{
ConLog.Warning("desc = '%s'", note.desc_text);
}
}
#ifdef LOADER_DEBUG
ConLog.SkipLn();
#endif
}
return true;
}
bool ELF32Loader::LoadShdrData(u64 offset)
{
for(u32 i=0; i<shdr_arr.GetCount(); ++i)
{
Elf32_Shdr& shdr = shdr_arr[i];
#ifdef LOADER_DEBUG
if(i < shdr_name_arr.GetCount()) ConLog.Write("Name: %s", shdr_name_arr[i]);
shdr.Show();
ConLog.SkipLn();
#endif
if((shdr.sh_type == SHT_RELA) || (shdr.sh_type == SHT_REL))
{
ConLog.Error("ELF32 ERROR: Relocation");
continue;
}
if((shdr.sh_flags & SHF_ALLOC) != SHF_ALLOC) continue;
if(shdr.sh_addr < min_addr)
{
min_addr = shdr.sh_addr;
}
if(shdr.sh_addr + shdr.sh_size > max_addr)
{
max_addr = shdr.sh_addr + shdr.sh_size;
}
}
//TODO
return true;
}