X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/fe8ab488e9161c46dd9885d58fc52996dc0249ff..e8c3f78193f1895ea514044358b93b1add9322f3:/tools/lldbmacros/core/kernelcore.py diff --git a/tools/lldbmacros/core/kernelcore.py b/tools/lldbmacros/core/kernelcore.py old mode 100644 new mode 100755 index 26a4dcf7a..43a3bd864 --- a/tools/lldbmacros/core/kernelcore.py +++ b/tools/lldbmacros/core/kernelcore.py @@ -6,6 +6,7 @@ from cvalue import * from lazytarget import * from configuration import * +from utils import * import caching import lldb @@ -46,12 +47,13 @@ def IterateLinkedList(element, field_name): elt = elt.__getattr__(field_name) #end of while loop -def IterateListEntry(element, element_type, field_name): +def IterateListEntry(element, element_type, field_name, list_prefix=''): """ iterate over a list as defined with LIST_HEAD in bsd/sys/queue.h params: element - value : Value object for lh_first element_type - str : Type of the next element field_name - str : Name of the field in next element's structure + list_prefix - str : use 's' here to iterate SLIST_HEAD instead returns: A generator does not return. It is used for iterating value : an object thats of type (element_type) head->le_next. Always a pointer object @@ -60,21 +62,64 @@ def IterateListEntry(element, element_type, field_name): for pp in IterateListEntry(headp, 'struct proc *', 'p_sibling'): print GetProcInfo(pp) """ - elt = element.lh_first + elt = element.__getattr__(list_prefix + 'lh_first') if type(element_type) == str: element_type = gettype(element_type) while unsigned(elt) != 0: yield elt - next_el = elt.__getattr__(field_name).le_next + next_el = elt.__getattr__(field_name).__getattr__(list_prefix + 'le_next') elt = cast(next_el, element_type) -def IterateQueue(queue_head, element_ptr_type, element_field_name): - """ iterate over a queue in kernel of type queue_head_t. refer to osfmk/kern/queue.h +def IterateLinkageChain(queue_head, element_type, field_name, field_ofst=0): + """ Iterate over a Linkage Chain queue in kernel of type queue_head_t. (osfmk/kern/queue.h method 1) + This is equivalent to the qe_foreach_element() macro + params: + queue_head - value : Value object for queue_head. + element_type - lldb.SBType : pointer type of the element which contains the queue_chain_t. Typically its structs like thread, task etc.. + - str : OR a string describing the type. ex. 'task *' + field_name - str : Name of the field (in element) which holds a queue_chain_t + field_ofst - int : offset from the 'field_name' (in element) which holds a queue_chain_t + This is mostly useful if a particular element contains an array of queue_chain_t + returns: + A generator does not return. It is used for iterating. + value : An object thats of type (element_type). Always a pointer object + example usage: + coalq = kern.GetGlobalVariable('coalitions_q') + for coal in IterateLinkageChain(coalq, 'struct coalition *', 'coalitions'): + print GetCoalitionInfo(coal) + """ + global kern + if type(element_type) == str: + element_type = gettype(element_type) + + if unsigned(queue_head) == 0: + return + + if element_type.IsPointerType(): + elem_ofst = getfieldoffset(element_type.GetPointeeType(), field_name) + field_ofst + else: + elem_ofst = getfieldoffset(element_type, field_name) + field_ofst + + link = queue_head.next + while (unsigned(link) != unsigned(queue_head)): + addr = unsigned(link) - elem_ofst; + # I can't use the GetValueFromAddress function of the kernel class + # because I have no instance of that class! + obj = value(link.GetSBValue().CreateValueFromExpression(None,'(void *)'+str(addr))) + obj = cast(obj, element_type) + yield obj + link = link.next + + +def IterateQueue(queue_head, element_ptr_type, element_field_name, backwards=False, unpack_ptr_fn=None): + """ Iterate over an Element Chain queue in kernel of type queue_head_t. (osfmk/kern/queue.h method 2) params: queue_head - value : Value object for queue_head. - element_ptr_type - lldb.SBType : a pointer type of the element 'next' points to. Typically its structs like thread, task etc.. + element_ptr_type - lldb.SBType : a pointer type of the element 'next' points to. Typically its structs like thread, task etc.. - str : OR a string describing the type. ex. 'task *' element_field_name - str : name of the field in target struct. + backwards - backwards : traverse the queue backwards + unpack_ptr_fn - function : a function ptr of signature def unpack_ptr(long v) which returns long. returns: A generator does not return. It is used for iterating. value : an object thats of type (element_type) queue_head->next. Always a pointer object @@ -91,15 +136,115 @@ def IterateQueue(queue_head, element_ptr_type, element_field_name): queue_head_addr = queue_head.GetValueAsUnsigned() else: queue_head_addr = queue_head.GetAddress().GetLoadAddress(LazyTarget.GetTarget()) - cur_elt = queue_head.GetChildMemberWithName('next') + + def unpack_ptr_and_recast(v): + if unpack_ptr_fn is None: + return v + v_unpacked = unpack_ptr_fn(v.GetValueAsUnsigned()) + obj = v.CreateValueFromExpression(None,'(void *)'+str(v_unpacked)) + obj.Cast(element_ptr_type) + return obj + + if backwards: + cur_elt = unpack_ptr_and_recast(queue_head.GetChildMemberWithName('prev')) + else: + cur_elt = unpack_ptr_and_recast(queue_head.GetChildMemberWithName('next')) + while True: if not cur_elt.IsValid() or cur_elt.GetValueAsUnsigned() == 0 or cur_elt.GetValueAsUnsigned() == queue_head_addr: break elt = cur_elt.Cast(element_ptr_type) yield value(elt) - cur_elt = elt.GetChildMemberWithName(element_field_name).GetChildMemberWithName('next') + if backwards: + cur_elt = unpack_ptr_and_recast(elt.GetChildMemberWithName(element_field_name).GetChildMemberWithName('prev')) + else: + cur_elt = unpack_ptr_and_recast(elt.GetChildMemberWithName(element_field_name).GetChildMemberWithName('next')) + + +def IterateRBTreeEntry(element, element_type, field_name): + """ iterate over a rbtree as defined with RB_HEAD in libkern/tree.h + element - value : Value object for rbh_root + element_type - str : Type of the link element + field_name - str : Name of the field in link element's structure + returns: + A generator does not return. It is used for iterating + value : an object thats of type (element_type) head->sle_next. Always a pointer object + """ + elt = element.__getattr__('rbh_root') + if type(element_type) == str: + element_type = gettype(element_type) + # Walk to find min + parent = elt + while unsigned(elt) != 0: + parent = elt + elt = cast(elt.__getattr__(field_name).__getattr__('rbe_left'), element_type) + elt = parent + + # Now elt is min + while unsigned(elt) != 0: + yield elt + # implementation cribbed from RB_NEXT in libkern/tree.h + right = cast(elt.__getattr__(field_name).__getattr__('rbe_right'), element_type) + if unsigned(right) != 0: + elt = right + left = cast(elt.__getattr__(field_name).__getattr__('rbe_left'), element_type) + while unsigned(left) != 0: + elt = left + left = cast(elt.__getattr__(field_name).__getattr__('rbe_left'), element_type) + else: + + # avoid using GetValueFromAddress + addr = elt.__getattr__(field_name).__getattr__('rbe_parent')&~1 + parent = value(elt.GetSBValue().CreateValueFromExpression(None,'(void *)'+str(addr))) + parent = cast(parent, element_type) + + if unsigned(parent) != 0: + left = cast(parent.__getattr__(field_name).__getattr__('rbe_left'), element_type) + if (unsigned(parent) != 0) and (unsigned(elt) == unsigned(left)): + elt = parent + else: + if unsigned(parent) != 0: + right = cast(parent.__getattr__(field_name).__getattr__('rbe_right'), element_type) + while unsigned(parent) != 0 and (unsigned(elt) == unsigned(right)): + elt = parent + + # avoid using GetValueFromAddress + addr = elt.__getattr__(field_name).__getattr__('rbe_parent')&~1 + parent = value(elt.GetSBValue().CreateValueFromExpression(None,'(void *)'+str(addr))) + parent = cast(parent, element_type) + + right = cast(parent.__getattr__(field_name).__getattr__('rbe_right'), element_type) + + # avoid using GetValueFromAddress + addr = elt.__getattr__(field_name).__getattr__('rbe_parent')&~1 + elt = value(elt.GetSBValue().CreateValueFromExpression(None,'(void *)'+str(addr))) + elt = cast(elt, element_type) + + +def IteratePriorityQueueEntry(root, element_type, field_name): + """ iterate over a priority queue as defined with struct priority_queue from osfmk/kern/priority_queue.h + root - value : Value object for the priority queue + element_type - str : Type of the link element + field_name - str : Name of the field in link element's structure + returns: + A generator does not return. It is used for iterating + value : an object thats of type (element_type). Always a pointer object + """ + def _make_pqe(addr): + return value(root.GetSBValue().CreateValueFromExpression(None,'(struct priority_queue_entry *)'+str(addr))) + + queue = [unsigned(root.pq_root_packed) & ~3] + + while len(queue): + elt = _make_pqe(queue.pop()) + + while elt: + yield containerof(elt, element_type, field_name) + addr = unsigned(elt.child) + if addr: queue.append(addr) + elt = elt.next class KernelTarget(object): @@ -115,6 +260,7 @@ class KernelTarget(object): self._threads_list = [] self._tasks_list = [] self._coalitions_list = [] + self._thread_groups = [] self._allproc = [] self._terminated_tasks_list = [] self._zones_list = [] @@ -130,7 +276,7 @@ class KernelTarget(object): def __getattr__(self, name): v = self._xnu_kernobj_12obscure12.GetGlobalVariable(name) if not v.GetSBValue().IsValid(): - raise ValueError('no such global variable by name: %s '%str(name)) + raise ValueError('No such global variable by name: %s '%str(name)) return v self.globals = _GlobalVariableFind(self) LazyTarget.Initialize(debugger) @@ -202,7 +348,10 @@ class KernelTarget(object): returns: value - python object representing global variable. raises : Exception in case the variable is not found. """ - return value(LazyTarget.GetTarget().FindGlobalVariables(name, 0).GetValueAtIndex(0)) + self._globals_cache_dict = caching.GetDynamicCacheData("kern._globals_cache_dict", {}) + if name not in self._globals_cache_dict: + self._globals_cache_dict[name] = value(LazyTarget.GetTarget().FindGlobalVariables(name, 1).GetValueAtIndex(0)) + return self._globals_cache_dict[name] def GetLoadAddressForSymbol(self, name): """ Get the load address of a symbol in the kernel. @@ -275,21 +424,52 @@ class KernelTarget(object): val = ((addr + size) & (unsigned(self.GetGlobalVariable("page_size"))-1)) return (val < size and val > 0) + + def PhysToKVARM64(self, addr): + ptov_table = self.GetGlobalVariable('ptov_table') + for i in range(0, self.GetGlobalVariable('ptov_index')): + if (addr >= long(unsigned(ptov_table[i].pa))) and (addr < (long(unsigned(ptov_table[i].pa)) + long(unsigned(ptov_table[i].len)))): + return (addr - long(unsigned(ptov_table[i].pa)) + long(unsigned(ptov_table[i].va))) + return (addr - unsigned(self.GetGlobalVariable("gPhysBase")) + unsigned(self.GetGlobalVariable("gVirtBase"))) + def PhysToKernelVirt(self, addr): if self.arch == 'x86_64': return (addr + unsigned(self.GetGlobalVariable('physmap_base'))) - elif self.arch == 'arm' or self.arch == 'arm64': + elif self.arch.startswith('arm64'): + return self.PhysToKVARM64(addr) + elif self.arch.startswith('arm'): return (addr - unsigned(self.GetGlobalVariable("gPhysBase")) + unsigned(self.GetGlobalVariable("gVirtBase"))) else: - raise ValueError("PhysToVirt does not support {0}".format(arch)) + raise ValueError("PhysToVirt does not support {0}".format(self.arch)) + + def GetNanotimeFromAbstime(self, abstime): + """ convert absolute time (which is in MATUs) to nano seconds. + Since based on architecture the conversion may differ. + params: + abstime - int absolute time as shown by mach_absolute_time + returns: + int - nanosecs of time + """ + usec_divisor = caching.GetStaticCacheData("kern.rtc_usec_divisor", None) + if not usec_divisor: + if self.arch == 'x86_64': + usec_divisor = 1000 + else: + rtclockdata_addr = self.GetLoadAddressForSymbol('RTClockData') + rtc = self.GetValueFromAddress(rtclockdata_addr, 'struct _rtclock_data_ *') + usec_divisor = unsigned(rtc.rtc_usec_divisor) + usec_divisor = int(usec_divisor) + caching.SaveStaticCacheData('kern.rtc_usec_divisor', usec_divisor) + nsecs = (abstime * 1000)/usec_divisor + return nsecs def __getattribute__(self, name): if name == 'zones' : self._zones_list = caching.GetDynamicCacheData("kern._zones_list", []) if len(self._zones_list) > 0: return self._zones_list - first_zone = self.GetGlobalVariable('first_zone') - for z in IterateLinkedList(first_zone, 'next_zone'): - self._zones_list.append(z) + zone_array = self.GetGlobalVariable('zone_array') + for i in range(0, self.GetGlobalVariable('num_zones')): + self._zones_list.append(addressof(zone_array[i])) caching.SaveDynamicCacheData("kern._zones_list", self._zones_list) return self._zones_list @@ -318,14 +498,25 @@ class KernelTarget(object): if name == 'coalitions' : self._coalitions_list = caching.GetDynamicCacheData("kern._coalitions_list", []) if len(self._coalitions_list) > 0 : return self._coalitions_list - coalition_queue_head = self.GetGlobalVariable('coalitions') + coalition_queue_head = self.GetGlobalVariable('coalitions_q') coalition_type = LazyTarget.GetTarget().FindFirstType('coalition') coalition_ptr_type = coalition_type.GetPointerType() - for tsk in IterateQueue(coalition_queue_head, coalition_ptr_type, 'coalitions'): - self._coalitions_list.append(tsk) + for coal in IterateLinkageChain(addressof(coalition_queue_head), coalition_ptr_type, 'coalitions'): + self._coalitions_list.append(coal) caching.SaveDynamicCacheData("kern._coalitions_list", self._coalitions_list) return self._coalitions_list + if name == 'thread_groups' : + self._thread_groups_list = caching.GetDynamicCacheData("kern._thread_groups_list", []) + if len(self._thread_groups_list) > 0 : return self._thread_groups_list + thread_groups_queue_head = self.GetGlobalVariable('tg_queue') + thread_group_type = LazyTarget.GetTarget().FindFirstType('thread_group') + thread_groups_ptr_type = thread_group_type.GetPointerType() + for coal in IterateLinkageChain(addressof(thread_groups_queue_head), thread_groups_ptr_type, 'tg_queue_chain'): + self._thread_groups_list.append(coal) + caching.SaveDynamicCacheData("kern._thread_groups_list", self._thread_groups_list) + return self._thread_groups_list + if name == 'terminated_tasks' : self._terminated_tasks_list = caching.GetDynamicCacheData("kern._terminated_tasks_list", []) if len(self._terminated_tasks_list) > 0 : return self._terminated_tasks_list @@ -392,12 +583,25 @@ class KernelTarget(object): self._ptrsize = caching.GetStaticCacheData("kern.ptrsize", None) if self._ptrsize != None : return self._ptrsize arch = LazyTarget.GetTarget().triple.split('-')[0] - if arch in ('x86_64', 'arm64'): + if arch == 'x86_64' or arch.startswith('arm64'): self._ptrsize = 8 else: self._ptrsize = 4 caching.SaveStaticCacheData("kern.ptrsize", self._ptrsize) return self._ptrsize - return object.__getattribute__(self, name) + if name == 'VM_MIN_KERNEL_ADDRESS': + if self.arch == 'x86_64': + return unsigned(0xFFFFFF8000000000) + elif self.arch.startswith('arm64'): + return unsigned(0xffffffe000000000) + else: + return unsigned(0x80000000) + if name == 'VM_MIN_KERNEL_AND_KEXT_ADDRESS': + if self.arch == 'x86_64': + return self.VM_MIN_KERNEL_ADDRESS - 0x80000000 + else: + return self.VM_MIN_KERNEL_ADDRESS + + return object.__getattribute__(self, name)