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#
# Copyright (c) 2011-2013, ARM Limited. All rights reserved.
#
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
# which accompanies this distribution. The full text of the license may be found at
# http://opensource.org/licenses/bsd-license.php
#
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#
import os
import firmware_volume
import build_report
import system_table
# Reload external classes
reload(firmware_volume)
reload(build_report)
reload(system_table)
def readMem32(executionContext, address):
bytes = executionContext.getMemoryService().read(address, 4, 32)
return struct.unpack('<I',bytes)[0]
def dump_fv(ec, fv_base, fv_size):
fv = firmware_volume.FirmwareVolume(ec,
int(build.PCDs['gArmTokenSpaceGuid']['PcdFvBaseAddress'][0],16),
int(build.PCDs['gArmTokenSpaceGuid']['PcdFvSize'][0],16))
ffs = fv.get_next_ffs()
while ffs != None:
print "# %s" % ffs
section = ffs.get_next_section()
while section != None:
print "\t%s" % section
try:
print "\t\t- %s" % section.get_debug_filepath()
except Exception:
pass
section = ffs.get_next_section(section)
ffs = fv.get_next_ffs(ffs)
def dump_system_table(ec, mem_base, mem_size):
st = system_table.SystemTable(ec, mem_base, mem_size)
debug_info_table_base = st.get_configuration_table(system_table.DebugInfoTable.CONST_DEBUG_INFO_TABLE_GUID)
debug_info_table = system_table.DebugInfoTable(ec, debug_info_table_base)
debug_info_table.dump()
def load_symbol_from_file(ec, filename, address, verbose = False):
if verbose:
print "Add symbols of %s at 0x%x" % (filename, address)
try:
ec.getImageService().addSymbols(filename, address)
except:
try:
# We could get an exception if the symbols are already loaded
ec.getImageService().unloadSymbols(filename)
ec.getImageService().addSymbols(filename, address)
except:
print "Warning: not possible to load symbols from %s at 0x%x" % (filename, address)
def is_aarch64(ec):
success = True
try:
# Try to access a Aarch64 specific register
ec.getRegisterService().getValue('X0')
except:
success = False
return success
class ArmPlatform:
def __init__(self, sysmembase=None, sysmemsize=None, fvs={}):
self.sysmembase = sysmembase
self.sysmemsize = sysmemsize
self.fvs = fvs
class ArmPlatformDebugger:
system_table = None
firmware_volumes = {}
REGION_TYPE_SYSMEM = 1
REGION_TYPE_ROM = 2
REGION_TYPE_FV = 3
def __init__(self, ec, report_log, regions, verbose = False):
self.ec = ec
self.verbose = verbose
fvs = []
sysmem_base = None
sysmem_size = None
if report_log and os.path.isfile(report_log):
try:
self.build = build_report.BuildReport(report_log)
except IOError:
raise IOError(2, 'Report \'%s\' is not valid' % report_log)
# Generate list of supported Firmware Volumes
if self.build.PCDs['gArmTokenSpaceGuid'].has_key('PcdFvSize') and int(self.build.PCDs['gArmTokenSpaceGuid']['PcdFvSize'][0],16) != 0:
fvs.append((int(self.build.PCDs['gArmTokenSpaceGuid']['PcdFvBaseAddress'][0],16),int(self.build.PCDs['gArmTokenSpaceGuid']['PcdFvSize'][0],16)))
if self.build.PCDs['gArmTokenSpaceGuid'].has_key('PcdSecureFvSize') and int(self.build.PCDs['gArmTokenSpaceGuid']['PcdSecureFvSize'][0],16) != 0:
fvs.append((int(self.build.PCDs['gArmTokenSpaceGuid']['PcdSecureFvBaseAddress'][0],16),int(self.build.PCDs['gArmTokenSpaceGuid']['PcdSecureFvSize'][0],16)))
if self.build.PCDs['gArmTokenSpaceGuid'].has_key('PcdHypFvSize') and int(self.build.PCDs['gArmTokenSpaceGuid']['PcdHypFvSize'][0],16) != 0:
fvs.append((int(self.build.PCDs['gArmTokenSpaceGuid']['PcdHypFvBaseAddress'][0],16),int(self.build.PCDs['gArmTokenSpaceGuid']['PcdHypFvSize'][0],16)))
sysmem_base = int(self.build.PCDs['gArmTokenSpaceGuid']['PcdSystemMemoryBase'][0],16)
sysmem_size = int(self.build.PCDs['gArmTokenSpaceGuid']['PcdSystemMemorySize'][0],16)
else:
for region in regions:
if region[0] == ArmPlatformDebugger.REGION_TYPE_SYSMEM:
sysmem_base = region[1]
sysmem_size = region[2]
elif region[0] == ArmPlatformDebugger.REGION_TYPE_FV:
fvs.append((region[1],region[2]))
elif region[0] == ArmPlatformDebugger.REGION_TYPE_ROM:
for base in xrange(region[1], region[1] + region[2], 0x400000):
signature = struct.unpack("cccc", self.ec.getMemoryService().read(base, 4, 32))
if signature == FirmwareVolume.CONST_FV_SIGNATURE:
fvs.append((base,0))
else:
print "Region type '%d' Not Supported" % region[0]
self.platform = ArmPlatform(sysmem_base, sysmem_size, fvs)
def in_sysmem(self, addr):
return (self.platform.sysmembase is not None) and (self.platform.sysmembase <= addr) and (addr < self.platform.sysmembase + self.platform.sysmemsize)
def in_fv(self, addr):
return (self.get_fv_at(addr) != None)
def get_fv_at(self, addr):
for fv in self.platform.fvs:
if (fv[0] <= addr) and (addr < fv[0] + fv[1]):
return fv
return None
def load_current_symbols(self):
pc = int(self.ec.getRegisterService().getValue('PC')) & 0xFFFFFFFF
if self.in_fv(pc):
debug_infos = []
(fv_base, fv_size) = self.get_fv_at(pc)
if self.firmware_volumes.has_key(fv_base) == False:
self.firmware_volumes[fv_base] = firmware_volume.FirmwareVolume(self.ec, fv_base, fv_size)
stack_frame = self.ec.getTopLevelStackFrame()
info = self.firmware_volumes[fv_base].load_symbols_at(int(stack_frame.getRegisterService().getValue('PC')) & 0xFFFFFFFF, self.verbose)
debug_infos.append(info)
while stack_frame.next() is not None:
stack_frame = stack_frame.next()
# Stack frame attached to 'PC'
pc = int(stack_frame.getRegisterService().getValue('PC')) & 0xFFFFFFFF
# Check if the symbols for this stack frame have already been loaded
found = False
for debug_info in debug_infos:
if (pc >= debug_info[0]) and (pc < debug_info[0] + debug_info[1]):
found = True
if found == False:
info = self.firmware_volumes[fv_base].load_symbols_at(pc)
debug_infos.append(info)
#self.firmware_volumes[fv_base].load_symbols_at(pc)
elif self.in_sysmem(pc):
debug_infos = []
if self.system_table is None:
# Find the System Table
self.system_table = system_table.SystemTable(self.ec, self.platform.sysmembase, self.platform.sysmemsize)
# Find the Debug Info Table
debug_info_table_base = self.system_table.get_configuration_table(system_table.DebugInfoTable.CONST_DEBUG_INFO_TABLE_GUID)
self.debug_info_table = system_table.DebugInfoTable(self.ec, debug_info_table_base)
stack_frame = self.ec.getTopLevelStackFrame()
info = self.debug_info_table.load_symbols_at(int(stack_frame.getRegisterService().getValue('PC')) & 0xFFFFFFFF, self.verbose)
debug_infos.append(info)
while stack_frame.next() is not None:
stack_frame = stack_frame.next()
# Stack frame attached to 'PC'
pc = int(stack_frame.getRegisterService().getValue('PC')) & 0xFFFFFFFF
# Check if the symbols for this stack frame have already been loaded
found = False
for debug_info in debug_infos:
if (pc >= debug_info[0]) and (pc < debug_info[0] + debug_info[1]):
found = True
if found == False:
try:
info = self.debug_info_table.load_symbols_at(pc)
debug_infos.append(info)
except:
pass
#self.debug_info_table.load_symbols_at(pc)
else:
raise Exception('ArmPlatformDebugger', "Not supported region")
def load_all_symbols(self):
# Load all the XIP symbols attached to the Firmware Volume
for (fv_base, fv_size) in self.platform.fvs:
if self.firmware_volumes.has_key(fv_base) == False:
self.firmware_volumes[fv_base] = firmware_volume.FirmwareVolume(self.ec, fv_base, fv_size)
self.firmware_volumes[fv_base].load_all_symbols(self.verbose)
try:
# Load all symbols of module loaded into System Memory
if self.system_table is None:
# Find the System Table
self.system_table = system_table.SystemTable(self.ec, self.platform.sysmembase, self.platform.sysmemsize)
# Find the Debug Info Table
debug_info_table_base = self.system_table.get_configuration_table(system_table.DebugInfoTable.CONST_DEBUG_INFO_TABLE_GUID)
self.debug_info_table = system_table.DebugInfoTable(self.ec, debug_info_table_base)
self.debug_info_table.load_all_symbols(self.verbose)
except:
# Debugger exception could be excepted if DRAM has not been initialized or if we have not started to run from DRAM yet
print "Note: no symbols have been found in System Memory (possible cause: the UEFI permanent memory has been installed yet)"
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