else:
raise NotImplementedError("decode_tte does not support {0}".format(kern.arch))
+
+PVH_HIGH_FLAGS_ARM64 = (1 << 62) | (1 << 61) | (1 << 60) | (1 << 59)
+PVH_HIGH_FLAGS_ARM32 = (1 << 31)
+
def PVWalkARM(pa):
""" Walk a physical-to-virtual reverse mapping list maintained by the arm pmap
pa: physical address (NOT page number). Does not need to be page-aligned
vm_last_phys = unsigned(kern.globals.vm_last_phys)
if pa < vm_first_phys or pa >= vm_last_phys:
raise ArgumentError("PA {:#x} is outside range of managed physical addresses: [{:#x}, {:#x})".format(pa, vm_first_phys, vm_last_phys))
- page_size = kern.globals.arm_hardware_page_size
+ page_size = kern.globals.page_size
pn = (pa - unsigned(kern.globals.vm_first_phys)) / page_size
pvh = unsigned(kern.globals.pv_head_table[pn])
pvh_type = pvh & 0x3
+ print "PVH raw value: ({:#x})".format(pvh)
+ if kern.arch.startswith('arm64'):
+ iommu_flag = 0x4
+ iommu_table_flag = 1 << 63
+ pvh = pvh | PVH_HIGH_FLAGS_ARM64
+ else:
+ iommu_flag = 0
+ iommu_table_flag = 0
+ pvh = pvh | PVH_HIGH_FLAGS_ARM32
if pvh_type == 0:
print "PVH type: NULL"
return
return
elif pvh_type == 2:
ptep = pvh & ~0x3
+ pte_str = ''
print "PVH type: single PTE"
- print "PTE {:#x}: {:#x}".format(ptep, dereference(kern.GetValueFromAddress(ptep, 'pt_entry_t *')))
+ if ptep & iommu_flag:
+ ptep = ptep & ~iommu_flag
+ if ptep & iommu_table_flag:
+ pte_str = ' (IOMMU table), entry'
+ else:
+ pte_str = ' (IOMMU state), descriptor'
+ ptep = ptep | iommu_table_flag
+ print "PTE {:#x}{:s}: {:#x}".format(ptep, pte_str, dereference(kern.GetValueFromAddress(ptep, 'pt_entry_t *')))
elif pvh_type == 1:
pvep = pvh & ~0x3
print "PVH type: PTE list"
current_pvep = pvep
pvep = unsigned(pve.pve_next) & ~0x1
ptep = unsigned(pve.pve_ptep) & ~0x3
+ if ptep & iommu_flag:
+ ptep = ptep & ~iommu_flag
+ if ptep & iommu_table_flag:
+ pve_str = ' (IOMMU table), entry'
+ else:
+ pve_str = ' (IOMMU state), descriptor'
+ ptep = ptep | iommu_table_flag
print "PVE {:#x}, PTE {:#x}{:s}: {:#x}".format(current_pvep, ptep, pve_str, dereference(kern.GetValueFromAddress(ptep, 'pt_entry_t *')))
@lldb_command('pv_walk')
raise NotImplementedError("pv_walk does not support {0}".format(kern.arch))
PVWalkARM(kern.GetValueFromAddress(cmd_args[0], 'unsigned long'))
+@lldb_command('kvtophys')
+def KVToPhys(cmd_args=None):
+ """ Translate a kernel virtual address to the corresponding physical address.
+ Assumes the virtual address falls within the kernel static region.
+ Syntax: (lldb) kvtophys <kernel virtual address>
+ """
+ if cmd_args == None or len(cmd_args) < 1:
+ raise ArgumentError("Too few arguments to kvtophys.")
+ if kern.arch.startswith('arm'):
+ print "{:#x}".format(KVToPhysARM(long(unsigned(kern.GetValueFromAddress(cmd_args[0], 'unsigned long')))))
+ elif kern.arch == 'x86_64':
+ print "{:#x}".format(long(unsigned(kern.GetValueFromAddress(cmd_args[0], 'unsigned long'))) - unsigned(kern.globals.physmap_base))
+
+@lldb_command('phystokv')
+def PhysToKV(cmd_args=None):
+ """ Translate a physical address to the corresponding static kernel virtual address.
+ Assumes the physical address corresponds to managed DRAM.
+ Syntax: (lldb) phystokv <physical address>
+ """
+ if cmd_args == None or len(cmd_args) < 1:
+ raise ArgumentError("Too few arguments to phystokv.")
+ print "{:#x}".format(kern.PhysToKernelVirt(long(unsigned(kern.GetValueFromAddress(cmd_args[0], 'unsigned long')))))
+
+def KVToPhysARM(addr):
+ if kern.arch.startswith('arm64'):
+ ptov_table = kern.globals.ptov_table
+ for i in range(0, kern.globals.ptov_index):
+ if (addr >= long(unsigned(ptov_table[i].va))) and (addr < (long(unsigned(ptov_table[i].va)) + long(unsigned(ptov_table[i].len)))):
+ return (addr - long(unsigned(ptov_table[i].va)) + long(unsigned(ptov_table[i].pa)))
+ return (addr - unsigned(kern.globals.gVirtBase) + unsigned(kern.globals.gPhysBase))
+
def ShowPTEARM(pte):
""" Display vital information about an ARM page table entry
pte: kernel virtual address of the PTE. Should be L3 PTE. May also work with L2 TTEs for certain devices.
"""
page_size = kern.globals.arm_hardware_page_size
- pn = (pte - unsigned(kern.globals.gVirtBase) + unsigned(kern.globals.gPhysBase) - unsigned(kern.globals.vm_first_phys)) / page_size
- pvh = kern.globals.pv_head_table[pn]
+ pn = (KVToPhysARM(pte) - unsigned(kern.globals.vm_first_phys)) / page_size
+ pvh = unsigned(kern.globals.pv_head_table[pn])
+ if kern.arch.startswith('arm64'):
+ pvh = pvh | PVH_HIGH_FLAGS_ARM64
+ else:
+ pvh = pvh | PVH_HIGH_FLAGS_ARM32
pvh_type = pvh & 0x3
- if pvh_type != 0x3 and pvh_type != 0x0:
+ if pvh_type != 0x3:
raise ValueError("PV head {:#x} does not correspond to a page-table descriptor".format(pvh))
ptd = kern.GetValueFromAddress(pvh & ~0x3, 'pt_desc_t *')
print "descriptor: {:#x}".format(ptd)
ScanPageTables(printMatchedMapping, targetPmap)
def checkPVList(pmap, level, type, tte, paddr, granule):
- """ Checks an ARM physical-to-virtual mapping list for consistency error.
+ """ Checks an ARM physical-to-virtual mapping list for consistency errors.
pmap: owner of the translation table
level: translation table level. PV lists will only be checked for L2 (arm32) or L3 (arm64) tables.
type: unused
"""
vm_first_phys = unsigned(kern.globals.vm_first_phys)
vm_last_phys = unsigned(kern.globals.vm_last_phys)
- page_size = kern.globals.arm_hardware_page_size
+ page_size = kern.globals.page_size
if kern.arch.startswith('arm64'):
page_offset_mask = (page_size - 1)
page_base_mask = ((1 << ARM64_VMADDR_BITS) - 1) & (~page_offset_mask)
paddr = paddr & page_base_mask
max_level = 3
+ pvh_set_bits = PVH_HIGH_FLAGS_ARM64
elif kern.arch == 'arm':
page_base_mask = 0xFFFFF000
paddr = paddr & page_base_mask
max_level = 2
+ pvh_set_bits = PVH_HIGH_FLAGS_ARM32
if level < max_level or paddr < vm_first_phys or paddr >= vm_last_phys:
return
pn = (paddr - vm_first_phys) / page_size
- pvh = unsigned(kern.globals.pv_head_table[pn])
+ pvh = unsigned(kern.globals.pv_head_table[pn]) | pvh_set_bits
pvh_type = pvh & 0x3
if pmap is not None:
pmap_str = "pmap: {:#x}: ".format(pmap)
-P : Interpret <addr> as a physical address rather than a PTE
"""
if cmd_args == None or len(cmd_args) < 1:
- raise ArgumentError("Too few arguments to showallmappings.")
+ raise ArgumentError("Too few arguments to pv_check.")
if kern.arch == 'arm':
level = 2
elif kern.arch.startswith('arm64'):
projects / apple / xnu.git / blobdiff