def test_set_name_offset(self):
sect = UnpreparedElfSection(None, "test")
self.assertEqual(hasattr(sect, "name_offset"), False) # FIMXE: is this really what we want to check
sect = sect.prepare(0, 0, 5)
self.assertEqual(sect.name_offset, 5)
sect.name_offset = 25
self.assertEqual(sect.name_offset, 25)
def test_copy_into(self):
elf_from = UnpreparedElfFile()
elf_to = UnpreparedElfFile()
sect = BaseElfSection(elf_from, "test")
# FIXME
#self.assertRaises(NotImplementedError, sect.copy_into, elf_to)
sect = UnpreparedElfSection(elf_from, "test")
new_sect = sect.copy_into(elf_to)
self.assertEquals(sect.name, new_sect.name)
prep_sect = sect.prepare(0, 0, 0)
# FIXME
#self.assertRaises(NotImplementedError, prep_sect.copy_into, elf_to)
sect = UnpreparedElfSection(elf_from, "test", SHT_NOBITS)
new_sect = sect.copy_into(elf_to)
self.assertEquals(sect.name, new_sect.name)
sect = UnpreparedElfStringTable(elf_from, "string")
strings = ["foo", "bar", "baz"]
for string in strings:
sect.add_string(string)
new_sect = sect.copy_into(elf_to)
for i in range(len(strings)):
self.assertEquals(sect.get_string_idx(i), new_sect.get_string_idx(i))
def test_get_link(self):
sect = UnpreparedElfSection(None, "test")
self.assertEqual(sect.link, None)
sect2 = UnpreparedElfSection(None, "test_link", link = sect)
self.assertEqual(sect2.link, sect)
sect3 = self.assertRaises(InvalidArgument, UnpreparedElfSection, "test_link", link = 80)
def test_replace_section(self):
elf_from = UnpreparedElfFile()
elf_to = UnpreparedElfFile()
seg = SectionedElfSegment(elf_from, sections=[UnpreparedElfSection(elf_from, "test")])
old_section = seg.get_sections()[0]
new_section = UnpreparedElfSection(elf_to, "new")
seg.replace_section(old_section, new_section)
self.assertEqual(seg.get_sections(), [new_section])
new_seg = seg.copy_into(elf_to)
self.assertRaises(InvalidArgument, seg.replace_section, None, new_section)
def test_add_symbols(self):
ef = UnpreparedElfFile()
sect = UnpreparedElfSection(ef, "test_sect")
symtab = UnpreparedElfSymbolTable(ef, ".symtab")
for name in ["foo", "bar"]:
symtab.add_symbol(ElfSymbol(name, sect))
ef = UnpreparedElfFile()
sect = UnpreparedElfSection(ef, "test_ect")
strtab = UnpreparedElfStringTable(ef, ".strtab")
symtab = UnpreparedElfSymbolTable(ef, ".symtab", link=strtab)
for name in ["foo", "bar"]:
symtab.add_symbol(ElfSymbol(name, sect))
def __init__(self, attrs, elf, _, pools, kernel_seg):
ImageKernelHeap.__init__(self, attrs, pools)
self.segment = None
self.kernel_segment = kernel_seg
data = self.attrs.data = ByteArray([])
if attrs.size is not None and len(data) < self.attrs.size:
data.extend([0] * (self.attrs.size - len(data)))
self.attrs.size = data.buffer_info()[1] * data.itemsize
section_name = "kernel.heap"
sect = UnpreparedElfSection(elf,
section_name,
SHT_PROGBITS,
self.attrs.virt_addr,
data=data,
flags=SHF_WRITE | SHF_ALLOC)
elf.add_section(sect)
self.segment = SectionedElfSegment(elf,
PT_LOAD,
self.attrs.virt_addr,
self.attrs.phys_addr,
PF_R | PF_W,
self.attrs.align,
sections=[sect])
elf.add_segment(self.segment)
def test_get_section_header(self):
# FIXME: This test uses broken semantics now that elf sections can't
# live on their own in the wild
sect = UnpreparedElfSection(None, "test")
self.assertEqual(hasattr(sect, "get_section_header"), False)
"""
def _get_segments(self):
elf_file = UnpreparedElfFile()
sections = [UnpreparedElfSection(elf_file, "test1", data=ByteArray("test1 data")),
UnpreparedElfSection(elf_file, "test2", data=ByteArray("test2 data"))]
empty_sec_seg = SectionedElfSegment(None)
full_sec_seg = SectionedElfSegment(elf_file, sections=sections)
head_seg = HeaderElfSegment(None)
prep_head_seg = HeaderElfSegment(None)
prep_head_seg.prepare(37, PROG_HEADER_SIZE)
data = ByteArray("pants")
full_data_seg = DataElfSegment(None, vaddr=DATA_BASE, paddr=PHYS_BASE, data=data)
nobits_data_seg = DataElfSegment(None, vaddr=DATA_BASE, paddr=PHYS_BASE, data=data, memsz=10)
return empty_sec_seg, full_sec_seg, head_seg, prep_head_seg, full_data_seg, nobits_data_seg
def clone_section(self, section, address):
"""
Returns a new section based on the provided section. This avoids a
circular dependency in the elfweaver linker's linker script code.
"""
return UnpreparedElfSection(self, section.name, section.type, address,
None, section.flags, section.addralign,
section.info, section.link,
section.entsize)
def test_remove_section(self):
empty_sec_seg, full_sec_seg, head_seg, prep_head_seg, full_data_seg, nobits_data_seg = self._get_segments()
section = UnpreparedElfSection(None)
self.assertRaises(InvalidArgument, empty_sec_seg.remove_section, section)
empty_sec_seg.add_section(section)
self.assertEqual(section in empty_sec_seg.sections, True)
empty_sec_seg.remove_section(section)
self.assertEqual(section in empty_sec_seg.sections, False)
self.assertRaises(InvalidArgument, empty_sec_seg.remove_section, section)
section = UnpreparedElfSection(None)
self.assertRaises(InvalidArgument, full_sec_seg.remove_section, section)
full_sec_seg.add_section(section)
self.assertEqual(section in full_sec_seg.sections, True)
full_sec_seg.remove_section(section)
self.assertEqual(section in full_sec_seg.sections, False)
self.assertRaises(InvalidArgument, full_sec_seg.remove_section, section)
def test_data_append(self):
data = ByteArray("pants")
sect = UnpreparedElfSection(None, "test", data = data)
self.assertEquals(sect.get_data(), data)
sect.append_data(ByteArray("foo"))
self.assertEquals(sect.get_data(), ByteArray("pantsfoo"))
sect = sect.prepare(0, 0, 0)
self.assertEqual(hasattr(sect, "data_append"), False)
def test_add_section(self):
empty_sec_seg, full_sec_seg, head_seg, prep_head_seg, full_data_seg, nobits_data_seg = self._get_segments()
section = UnpreparedElfSection(None)
# Adding to a section segment should work
empty_sec_seg.add_section(section)
self.assertEqual(section in empty_sec_seg.sections, True)
full_sec_seg.add_section(section)
self.assertEqual(section in full_sec_seg.sections, True)
def __init__(self, filename=None):
BaseElfFile.__init__(self)
if filename is not None:
self.init_and_prepare_from_filename(filename)
else:
self.sections = [UnpreparedElfSection()]
self.segments = []
self._sh_offset = None
self._sh_strndx = 0
self.special_symbols = []
def test_prepare(self):
ef = UnpreparedElfFile()
sect = UnpreparedElfSection(ef, "test_sect")
symtab = UnpreparedElfSymbolTable(ef, ".symtab")
for name in ["foo", "bar"]:
symtab.add_symbol(ElfSymbol(name, sect))
ef.wordsize = 32
ef.endianess = "<"
symtab = symtab.prepare(0x1000, 1, 0)
def __init__(self, filename=None):
BaseElfFile.__init__(self)
if filename is not None:
self.init_and_prepare_from_filename(filename)
else:
self.sections = [UnpreparedElfSection(self)]
self.segments = []
self._sh_offset = None
self._sh_strndx = 0
# Hold a list of the symbols in the got table
self.got_table = []
def allocate_section(self, sect_name):
"""
Returns the section requested, creating a new one if required.
"""
sect = self.find_section_named(sect_name)
if sect == None:
if sect_name.find('bss') != -1:
sect = UnpreparedElfSection(self, sect_name, SHT_NOBITS, 0, 0,
SHF_WRITE | SHF_ALLOC, 8)
elif sect_name == '.got':
sect = UnpreparedElfSection(self,
sect_name,
SHT_PROGBITS,
0,
ByteArray(),
SHF_WRITE | SHF_ALLOC,
4,
entsize=4)
got_plt = UnpreparedElfSection(self,
'.got.plt',
SHT_PROGBITS,
0,
ByteArray('\0' * 4 * 3),
SHF_WRITE | SHF_ALLOC,
4,
entsize=4)
self.add_section(got_plt)
else:
sect = UnpreparedElfSection(self,
sect_name,
SHT_PROGBITS,
0,
ByteArray(),
SHF_WRITE | SHF_ALLOC,
4,
entsize=4)
self.add_section(sect)
return sect
def test_copy_into(self):
ef, sect, symbol = self._build_test_symbol()
self._set_symbol_values(symbol)
sect = UnpreparedElfSection(ef, "new_section")
new_symbol = symbol.copy_into(sect)
self.assertEqual(symbol.value, new_symbol.value)
self.assertEqual(symbol.size, new_symbol.size)
self.assertEqual(symbol.type, new_symbol.type)
self.assertEqual(symbol.bind, new_symbol.bind)
self.assertEqual(symbol.other, new_symbol.other)
self.assertEqual(symbol.shndx, new_symbol.shndx)
self.assertEqual(symbol.name, new_symbol.name)
self.assertEqual(new_symbol.section, sect)
def test_repr(self):
ef, sect, symbol = self._build_test_symbol()
s1 = str(symbol)
# We expect a differnt result when we have actual values
symbol.value = 37
symbol.size = 100
s2 = str(symbol)
self.assertNotEqual(s1, s2)
# Same symbol, different section, should give differnt string
sect = UnpreparedElfSection(ef, "test_section")
symbol2 = ElfSymbol("test_symbol", sect, old_sym=symbol)
s3 = str(symbol2)
self.assertNotEqual(s2, s3)
def test_copy_into(self):
elf_from = UnpreparedElfFile()
elf_to = UnpreparedElfFile()
seg = DataElfSegment(elf_from, ByteArray("pants"))
new_seg = seg.copy_into(elf_to)
seg = SectionedElfSegment(elf_from)
seg.sections = [UnpreparedElfSection(elf_from, "test")]
new_seg = seg.copy_into(elf_to)
seg = DataElfSegment(elf_from, ByteArray("pants"))
seg._data = ByteArray()
new_seg = seg.copy_into(elf_to)
seg = DataElfSegment(elf_from, ByteArray("pants"))
seg.prepare(34)
new_seg = seg.copy_into(elf_to)
seg = HeaderElfSegment(elf_from)
new_seg = seg.copy_into(elf_to)
def test_init(self):
ElfSegment(None)
ElfSegment(None, PT_LOAD)
ElfSegment(None, program_header_type = PT_LOAD)
sections = [UnpreparedElfSection(None, "foo")]
self.assertRaises(TypeError, ElfSegment,
data = ByteArray("pants"), sections = sections)
seg = ElfSegment(None, program_header_type=PT_LOAD, vaddr=None, paddr=None)
self.assertEquals(seg.vaddr, 0)
self.assertEquals(seg.paddr, 0)
prog_header = ElfProgramHeader("<")
prog_header.p_type = PT_LOAD
prog_header.p_vaddr = 0x1000
prog_header.p_paddr = 0x10000
prog_header.p_flags = 0x100
prog_header.p_align = 0x4000
seg = ElfSegment(None, prog_header=prog_header)
self.assertEquals(prog_header.p_type, seg.type)
self.assertEquals(prog_header.p_vaddr, seg.vaddr)
self.assertEquals(prog_header.p_paddr, seg.paddr)
self.assertEquals(prog_header.p_flags, seg.flags)
self.assertEquals(prog_header.p_align, seg.align)
def test_set_flags(self):
sect = UnpreparedElfSection(None, "test")
self.assertEqual(sect.flags, 0)
sect.flags = 0xff
self.assertEqual(sect.flags, 0xff)
def test_setname(self):
sect = UnpreparedElfSection(None, "test")
self.assertEqual(sect.name, "test")
sect.name = "pants"
self.assertEqual(sect.name, "pants")
def test_init(self):
UnpreparedElfSection(None, "test")
UnpreparedElfSection(None, "test", SHT_PROGBITS)
UnpreparedElfSection(None, "test", section_type = SHT_PROGBITS)
sec = UnpreparedElfSection(None, "test", address = None)
self.assertEquals(sec.address, 0)
def test_setname_prepared(self):
sect = UnpreparedElfSection(None, "test")
self.assertEqual(sect.name, "test")
sect = sect.prepare(0, 0, 0)
self.assertEqual(hasattr(sect, "set_name"), False) # FIXME: this isn't the right thing to check
def test_set_addralign(self):
sect = UnpreparedElfSection(None, "test")
self.assertEqual(sect.addralign, 0)
sect.addralign = 13
self.assertEqual(sect.addralign, 13)
def test_set_info(self):
sect = UnpreparedElfSection(None, "test")
self.assertEqual(sect.info, None)
sect.info = 13
self.assertEqual(sect.info, 13)
def test_repr(self):
sect = UnpreparedElfSection(None, "test")
self.assertEquals(repr(sect), "<UnpreparedElfSection NULL test>")
def test_get_size(self):
sect = UnpreparedElfSection(None, "test")
self.assertEqual(sect.get_size(), 0)
sect = UnpreparedElfSection(None, "test", data = ByteArray("pants"))
self.assertEqual(sect.get_size(), 5)
def test_get_offset(self):
sect = UnpreparedElfSection(None, "test")
self.assertEqual(hasattr(sect, "get_offset"), False)
sect = sect.prepare(15, 0, 0)
self.assertEqual(sect.offset, 15)
def test_get_data(self):
data = ByteArray("pants")
sect = UnpreparedElfSection(None, "test", data = data)
self.assertEquals(sect.get_data(), data)
def test_get_index(self):
sect = UnpreparedElfSection(None, "test")
self.assertEqual(hasattr(sect, "get_index"), False)
sect = sect.prepare(0, 15, 0)
self.assertEqual(sect.index, 15)
def test_settype(self):
sect = UnpreparedElfSection(None, "test")
self.assertEqual(sect.type, SHT_NULL)
sect.type = SHT_PROGBITS
self.assertEqual(sect.type, SHT_PROGBITS)
def test_set_address(self):
sect = UnpreparedElfSection(None, "test")
self.assertEqual(sect.address, 0)
sect.address = 25
self.assertEqual(sect.address, 25)
