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PS3View.py
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from binaryninja import *
from .CellPPE import CellPPE
from .ElfSce import *
from .Syscalls import *
class PS3View(BinaryView):
name = "PS3ELF"
long_name = "PlayStation 3 ELF"
base_addr = 0x10000
syscall_addr = 0x08000000
def __init__(self, data):
BinaryView.__init__(self, parent_view = data, file_metadata = data.file)
self.data = data
@classmethod
def is_valid_for_data(cls, data) -> bool:
header = data.read(0, 64)
return (
header[0:4] == b'\x7fELF' and # elf magic
header[5] == 0x2 and # big endian
header[7] == 0x66 and # OS (CELL_LV2)
header[18:20] == b'\x00\x15' # e_machine (PPC64)
)
def register_commands(self):
PluginCommand.register(
'ps3-syscall-sweep',
"Scan for LV2 system calls and annotate their names where possible",
lambda bv: SyscallAnalysisTask(bv).start()
)
def perform_get_default_endianness(self) -> Endianness:
return Endianness.BigEndian
def perform_is_executable(self) -> bool:
return True
def perform_get_entry_point(self) -> int:
return struct.unpack(">Q", self.data.read(0x18, 8))[0]
def _get_address_size(self, ctxt):
return self.arch.address_size
def init(self):
cellbe = CellPPE(Architecture['ppc64'])
cellbe.register()
self.arch = cellbe
self.platform = self.arch.standalone_platform
sc_conv = PS3SyscallCallingConvention(self.arch, "lv2-syscall")
self.platform.system_call_convention = sc_conv
self.create_tag_type(self.name, "🎮")
define_elf_types(self)
define_sce_types(self)
self.register_commands()
# elf header
self.add_auto_segment(self.base_addr, 0x40, 0x0, 0x40, SegmentFlag.SegmentReadable | SegmentFlag.SegmentContainsData)
self.define_data_var(self.base_addr, "Elf64_Ehdr", "_file_header")
elf_header = self.get_data_var_at(self.base_addr)
# program headers / segments
e_phoff = elf_header["e_phoff"].value
e_phentsize = elf_header["e_phentsize"].value
e_phnum = elf_header["e_phnum"].value
self.add_auto_segment(self.base_addr + e_phoff, e_phentsize * e_phnum, e_phoff, e_phentsize * e_phnum, SegmentFlag.SegmentReadable | SegmentFlag.SegmentContainsData)
self.define_data_var(self.base_addr + e_phoff, Type.array(self.get_type_by_id("Elf64_Phdr"), e_phnum), "_program_headers")
program_headers = self.get_data_var_at(self.base_addr + e_phoff)
for i in range(e_phnum):
phdr = program_headers[i]
p_flags = phdr["p_flags"].value
p_offset = phdr["p_offset"].value
p_vaddr = phdr["p_vaddr"].value
p_filesz = phdr["p_filesz"].value
p_memsz = phdr["p_memsz"].value
flags = get_segment_flags(p_flags)
self.add_auto_segment(p_vaddr, p_memsz, p_offset, p_filesz, flags)
p_type = self.read_int(phdr["p_type"].address, 4, False)
if(p_type == 0x60000001): # PT_PROC_PARAM
if(p_vaddr > 0):
self.add_tag(p_vaddr, self.name, "_process_param")
self.define_data_var(p_vaddr, self.get_type_by_id("sys_process_param_t"), "_sys_process_param_t")
module_info_addr = p_vaddr
else:
log.log_error("phdr{i}: PT_PROC_PARAM header doesn't have an address!")
if(p_type == 0x60000002): # PT_PROC_PRX
if(p_vaddr > 0):
self.add_tag(p_vaddr, self.name, "_prx_info")
self.define_data_var(p_vaddr, self.get_type_by_id("sys_process_prx_info_t"), "_sys_process_prx_info_t")
prx_info_addr = p_vaddr
else:
log.log_error(f"phdr{i}: PT_PROC_PRX header doesn't have an address!")
# elf sections
e_shoff = elf_header["e_shoff"].value
e_shentsize = elf_header["e_shentsize"].value
e_shnum = elf_header["e_shnum"].value
self.add_auto_segment(self.base_addr + e_shoff, e_shentsize * e_shnum, e_shoff, e_shentsize * e_shnum, SegmentFlag.SegmentReadable | SegmentFlag.SegmentContainsData)
self.define_data_var(self.base_addr + e_shoff, Type.array(self.get_type_by_id("Elf64_Shdr"), e_shnum), "_section_headers")
self.add_tag(self.base_addr + e_shoff, self.name, "_section_headers", False)
section_headers = self.get_data_var_at(self.base_addr + e_shoff)
# section header string table
e_shstrndx = elf_header["e_shstrndx"].value
shstrtab_hdr = section_headers[e_shstrndx]
shstrtab_offset = shstrtab_hdr["sh_offset"].value
shstrtab_size = shstrtab_hdr["sh_size"].value
shstrtab = self.data.read(shstrtab_offset, shstrtab_size)
self.add_tag(self.base_addr + shstrtab_offset, self.name, "_shdr_string_table")
for i in range(e_shnum):
shdr = section_headers[i]
sh_name_offset = shdr["sh_name"].value
sh_name = shstrtab[sh_name_offset:].split(b'\x00', 1)[0].decode('utf-8')
sh_type = shdr["sh_type"].value
if not sh_name:
shtype_name = str(sh_type).removeprefix('<SHT_').split()[0]
sh_name = f"{shtype_name} ({i})"
sh_addr = shdr["sh_addr"].value
sh_offset = shdr["sh_offset"].value
sh_size = shdr["sh_size"].value
sh_flags = shdr["sh_flags"].value
flags = get_section_semantics(sh_type, sh_flags)
addr = sh_addr if sh_addr != 0 else self.base_addr + sh_offset
self.add_auto_section(sh_name, addr, sh_size, flags)
# e_entry points to a function descriptor in opd section
e_entry = elf_header["e_entry"].value
self.add_tag(e_entry, self.name, "_toc_.start")
# define functions from OPD table
opd_section = self.get_sections_at(e_entry)[0]
log.log_info(f"e_entry in .opd section at 0x{opd_section.start:02x}!")
opd_entry_count = opd_section.length // 8
func_desc_t = self.get_type_by_id("func_desc")
for i in range(opd_entry_count):
offset = opd_section.start + (i * 8)
self.define_data_var(offset, func_desc_t, f"PTR_{i}")
entry = self.get_data_var_at(offset)
addr = entry["func_entry"].value
if(offset == e_entry):
entry.name = "PTR_start"
self.add_entry_point(addr)
self.add_tag(addr, self.name, "_start", False)
self.define_auto_symbol(Symbol(SymbolType.FunctionSymbol, addr, f".start"))
continue
self.get_data_var_at(offset).name = f"PTR_{addr:02x}"
addr_sections = self.get_sections_at(addr)
for section in addr_sections:
if(section.semantics == SectionSemantics.ReadOnlyCodeSectionSemantics):
self.add_function(addr)
break
# PRX imports
fnids = load_fnids()
prx_info = self.get_data_var_at(prx_info_addr)
stub_start = prx_info["libstub_start"].value
stub_end = prx_info["libstub_end"].value
stub_size = stub_end - stub_start
stub_count = int(stub_size / 0x2C)
log.log_info(f"stub_count: '{stub_count}'")
if(stub_count > 0):
libstubppu32_t = self.get_type_by_id("scelibstub_ppu32")
self.define_data_var(stub_start, Type.array(libstubppu32_t, stub_count), "_prx_import_stubs")
self.add_tag(stub_start, self.name, "_prx_import_stubs", False)
stubs = self.get_data_var_at(stub_start)
for stub in stubs.value:
libname_addr = stub["libname"]
if(libname_addr > 0):
libname = self.get_ascii_string_at(stub["libname"])
else:
libname = ""
log.log_info(f"prx imports module '{libname}'")
num_func = stub["common"]["num_func"]
if num_func > 0:
nid_table = stub["func_nidtable"]
addr_table = stub["func_table"]
for j in range(num_func):
nid = self.read_int(nid_table + (j * 4), 4, False)
func_addr = self.read_int(addr_table + (j * 4), 4, False)
nid_hex = f"0x{nid:08X}"
func_name = fnids.get(nid_hex)
if func_name is None:
log.log_warn(f"Missing nid: {libname}:{nid_hex}")
func_name = f"{libname}_{nid_hex}"
self.define_auto_symbol(Symbol(
SymbolType.ImportedFunctionSymbol,
func_addr,
short_name=func_name,
full_name=f"{libname}:{func_name}",
namespace=libname
))
return True