def _readProtocolRefListsAt(machO, vmaddrs):
"""Return the an iterable of addresses to protocols from the iterable
*vmaddrs* pointing to ``old_protocol_list``\\s."""
# struct old_protocol_list {
# struct old_protocol_list *next;
# long count;
# struct old_protocol *list[1];
# };
f = machO.file
stack = list(vmaddrs)
while True:
newStack = []
for vmaddr in stack:
machO.seek(machO.fromVM(vmaddr))
(next, count) = readStruct(f, machO.makeStruct('2^'))
if next:
newStack.append(next)
for addr in peekPrimitives(f, '^', count, machO.endian, machO.is64bit):
yield addr
if not newStack:
break
stack = newStack
def _loadSections(self, machO):
segStruct = machO.makeStruct('16s4^2i2L')
sectStruct = machO.makeStruct(Section.STRUCT_FORMAT)
(segname, self.vmaddr, self._vmsize, self._fileoff, self._filesize,
self.maxprot, self.initprot, nsects,
_) = readStruct(machO.file, segStruct)
self.segname = fromStringz(segname)
machO_fileOrigin = machO._fileOrigin
sectVals = peekStructs(machO.file, sectStruct,
count=nsects) # get all section headers
sectionsList = (Section.createSection(i) for i in sectVals
) # convert all headers into Section objects
sections = DataTable('className', 'sectname', 'ftype')
for s in sectionsList:
if s.offset < machO_fileOrigin:
s.offset += machO_fileOrigin
sections.append(s,
className=type(s).__name__,
sectname=s.sectname,
ftype=s.ftype)
self.sections = sections
self._hasAnalyzedSections = False
self._shouldImportMappings = machO.mappings.mutable
def f(machO, vmaddr, *args, **kwargs):
if vmaddr:
machO.seek(machO.fromVM(vmaddr))
count = readStruct(machO.file, machO.makeStruct('2L'))[1]
lst = [method(machO, *args, **kwargs) for _ in range(count)]
lst.reverse() # it is needed because the methods defined early will often appear later in the binary.
return lst
else:
return []
def f(machO, vmaddr, *args, **kwargs):
if vmaddr:
machO.seek(machO.fromVM(vmaddr))
count = readStruct(machO.file, machO.makeStruct('2L'))[1]
lst = [method(machO, *args, **kwargs) for _ in range(count)]
lst.reverse() # it is needed because the methods defined early will often appear later in the binary.
return lst
else:
return []
def readProperty(machO):
"""Read an ``objc_property`` at current position to a :class:`~objc.property.Property`."""
# struct objc_property {
# const char *name;
# const char *attributes;
# };
(namePtr, attribPtr) = readStruct(machO.file, machO.makeStruct('2^'))
name = machO.derefString(namePtr)
attrib = machO.derefString(attribPtr)
return Property(name, attrib)
def readProperty(machO):
"""Read an ``objc_property`` at current position to a :class:`~objc.property.Property`."""
# struct objc_property {
# const char *name;
# const char *attributes;
# };
(namePtr, attribPtr) = readStruct(machO.file, machO.makeStruct('2^'))
name = machO.derefString(namePtr)
attrib = machO.derefString(attribPtr)
return Property(name, attrib)
def readMethod(machO, optional):
"""Read a ``method_t`` at current position to a :class:`~objc.method.Method`."""
# typedef struct method_t {
# SEL name;
# const char *types;
# IMP imp;
# } method_t;
(namePtr, encPtr, imp) = readStruct(machO.file, machO.makeStruct('3^'))
name = machO.derefString(namePtr)
encoding = machO.derefString(encPtr)
return Method(name, encoding, imp, optional)
def readMethod(machO, optional):
"""Read a ``method_t`` at current position to a :class:`~objc.method.Method`."""
# typedef struct method_t {
# SEL name;
# const char *types;
# IMP imp;
# } method_t;
(namePtr, encPtr, imp) = readStruct(machO.file, machO.makeStruct('3^'))
name = machO.derefString(namePtr)
encoding = machO.derefString(encPtr)
return Method(name, encoding, imp, optional)
def _readProtocolRefListAt(machO, vmaddr):
"""Return the an iterable of addresses to protocols from *vmaddr*."""
# typedef struct protocol_list_t {
# // count is 64-bit by accident.
# uintptr_t count;
# protocol_ref_t list[0]; // variable-size
# } protocol_list_t;
if vmaddr:
machO.seek(machO.fromVM(vmaddr))
ptrStru = machO.makeStruct('^')
count = readStruct(machO.file, ptrStru)[0]
return peekPrimitives(machO.file, '^', count, machO.endian, machO.is64bit)
else:
return []
def _readProtocolRefListAt(machO, vmaddr):
"""Return the an iterable of addresses to protocols from *vmaddr*."""
# typedef struct protocol_list_t {
# // count is 64-bit by accident.
# uintptr_t count;
# protocol_ref_t list[0]; // variable-size
# } protocol_list_t;
if vmaddr:
machO.seek(machO.fromVM(vmaddr))
ptrStru = machO.makeStruct('^')
count = readStruct(machO.file, ptrStru)[0]
return peekPrimitives(machO.file, '^', count, machO.endian, machO.is64bit)
else:
return []
def readIvar(machO):
"""Read an ``ivar_t`` at current position to an :class:`~objc.ivar.Ivar`."""
# typedef struct ivar_t {
# // *offset is 64-bit by accident even though other
# // fields restrict total instance size to 32-bit.
# uintptr_t *offset;
# const char *name;
# const char *type;
# // alignment is sometimes -1; use ivar_alignment() instead
# uint32_t alignment __attribute__((deprecated));
# uint32_t size;
# } ivar_t;
(offsetPtr, namePtr, encPtr, _, _) = readStruct(machO.file, machO.makeStruct('3^2L'))
offset = machO.deref(offsetPtr, machO.makeStruct('^'))[0]
name = machO.derefString(namePtr)
encoding = machO.derefString(encPtr)
return Ivar(name, encoding, offset)
def readIvar(machO):
"""Read an ``ivar_t`` at current position to an :class:`~objc.ivar.Ivar`."""
# typedef struct ivar_t {
# // *offset is 64-bit by accident even though other
# // fields restrict total instance size to 32-bit.
# uintptr_t *offset;
# const char *name;
# const char *type;
# // alignment is sometimes -1; use ivar_alignment() instead
# uint32_t alignment __attribute__((deprecated));
# uint32_t size;
# } ivar_t;
(offsetPtr, namePtr, encPtr, _, _) = readStruct(machO.file, machO.makeStruct('3^2L'))
offset = machO.deref(offsetPtr, machO.makeStruct('L'))[0]
name = machO.derefString(namePtr)
encoding = machO.derefString(encPtr)
return Ivar(name, encoding, offset, offsetPtr)
def _loadSections(self, machO):
segStruct = machO.makeStruct('16s4^2i2L')
sectStruct = machO.makeStruct(Section.STRUCT_FORMAT)
(segname, self.vmaddr, self._vmsize, self._fileoff, self._filesize, self.maxprot, self.initprot, nsects, _) = readStruct(machO.file, segStruct)
self.segname = fromStringz(segname)
machO_fileOrigin = machO._fileOrigin
sectVals = peekStructs(machO.file, sectStruct, count=nsects) # get all section headers
sectionsList = (Section.createSection(i) for i in sectVals) # convert all headers into Section objects
sections = DataTable('className', 'sectname', 'ftype')
for s in sectionsList:
if s.offset < machO_fileOrigin:
s.offset += machO_fileOrigin
sections.append(s, className=type(s).__name__, sectname=s.sectname, ftype=s.ftype)
self.sections = sections
self._hasAnalyzedSections = False
self._shouldImportMappings = machO.mappings.mutable
