1 # 2 # Copyright (c) 2011-2013, ARM Limited. All rights reserved. 3 # 4 # This program and the accompanying materials 5 # are licensed and made available under the terms and conditions of the BSD License 6 # which accompanies this distribution. The full text of the license may be found at 7 # http://opensource.org/licenses/bsd-license.php 8 # 9 # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 10 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 11 # 12 13 from arm_ds.debugger_v1 import DebugException 14 15 import struct 16 17 import edk2_debugger 18 import firmware_volume 19 20 class DebugInfoTable: 21 CONST_DEBUG_INFO_TABLE_GUID = ( 0x49152E77L, 0x47641ADAL, 0xFE7AA2B7L, 0x8B5ED9FEL) 22 23 DebugInfos = [] 24 25 def __init__(self, ec, debug_info_table_header_offset): 26 self.ec = ec 27 self.base = debug_info_table_header_offset 28 29 def get_debug_info(self): 30 # Get the information from EFI_DEBUG_IMAGE_INFO_TABLE_HEADER 31 count = self.ec.getMemoryService().readMemory32(self.base + 0x4) 32 if edk2_debugger.is_aarch64(self.ec): 33 debug_info_table_base = self.ec.getMemoryService().readMemory64(self.base + 0x8) 34 else: 35 debug_info_table_base = self.ec.getMemoryService().readMemory32(self.base + 0x8) 36 37 self.DebugInfos = [] 38 39 for i in range(0, count): 40 # Get the address of the structure EFI_DEBUG_IMAGE_INFO 41 if edk2_debugger.is_aarch64(self.ec): 42 debug_info = self.ec.getMemoryService().readMemory64(debug_info_table_base + (i * 8)) 43 else: 44 debug_info = self.ec.getMemoryService().readMemory32(debug_info_table_base + (i * 4)) 45 46 if debug_info: 47 debug_info_type = self.ec.getMemoryService().readMemory32(debug_info) 48 # Normal Debug Info Type 49 if debug_info_type == 1: 50 if edk2_debugger.is_aarch64(self.ec): 51 # Get the base address of the structure EFI_LOADED_IMAGE_PROTOCOL 52 loaded_image_protocol = self.ec.getMemoryService().readMemory64(debug_info + 0x8) 53 54 image_base = self.ec.getMemoryService().readMemory64(loaded_image_protocol + 0x40) 55 image_size = self.ec.getMemoryService().readMemory32(loaded_image_protocol + 0x48) 56 else: 57 # Get the base address of the structure EFI_LOADED_IMAGE_PROTOCOL 58 loaded_image_protocol = self.ec.getMemoryService().readMemory32(debug_info + 0x4) 59 60 image_base = self.ec.getMemoryService().readMemory32(loaded_image_protocol + 0x20) 61 image_size = self.ec.getMemoryService().readMemory32(loaded_image_protocol + 0x28) 62 63 self.DebugInfos.append((image_base,image_size)) 64 65 # Return (base, size) 66 def load_symbols_at(self, addr, verbose = False): 67 if self.DebugInfos == []: 68 self.get_debug_info() 69 70 found = False 71 for debug_info in self.DebugInfos: 72 if (addr >= debug_info[0]) and (addr < debug_info[0] + debug_info[1]): 73 if edk2_debugger.is_aarch64(self.ec): 74 section = firmware_volume.EfiSectionPE64(self.ec, debug_info[0]) 75 else: 76 section = firmware_volume.EfiSectionPE32(self.ec, debug_info[0]) 77 78 try: 79 edk2_debugger.load_symbol_from_file(self.ec, section.get_debug_filepath(), section.get_debug_elfbase(), verbose) 80 except Exception, (ErrorClass, ErrorMessage): 81 if verbose: 82 print "Error while loading a symbol file (%s: %s)" % (ErrorClass, ErrorMessage) 83 84 found = True 85 return debug_info 86 87 if found == False: 88 raise Exception('DebugInfoTable','No symbol found at 0x%x' % addr) 89 90 def load_all_symbols(self, verbose = False): 91 if self.DebugInfos == []: 92 self.get_debug_info() 93 94 for debug_info in self.DebugInfos: 95 if edk2_debugger.is_aarch64(self.ec): 96 section = firmware_volume.EfiSectionPE64(self.ec, debug_info[0]) 97 else: 98 section = firmware_volume.EfiSectionPE32(self.ec, debug_info[0]) 99 100 try: 101 edk2_debugger.load_symbol_from_file(self.ec, section.get_debug_filepath(), section.get_debug_elfbase(), verbose) 102 except Exception, (ErrorClass, ErrorMessage): 103 if verbose: 104 print "Error while loading a symbol file (%s: %s)" % (ErrorClass, ErrorMessage) 105 106 def dump(self): 107 self.get_debug_info() 108 for debug_info in self.DebugInfos: 109 base_pe32 = debug_info[0] 110 if edk2_debugger.is_aarch64(self.ec): 111 section = firmware_volume.EfiSectionPE64(self.ec, base_pe32) 112 else: 113 section = firmware_volume.EfiSectionPE32(self.ec, base_pe32) 114 print section.get_debug_filepath() 115 116 class SystemTable: 117 CONST_ST_SIGNATURE = ('I','B','I',' ','S','Y','S','T') 118 119 def __init__(self, ec, membase, memsize): 120 self.membase = membase 121 self.memsize = memsize 122 self.ec = ec 123 124 found = False 125 126 # Start from the top of the memory 127 offset = self.membase + self.memsize 128 # Align to highest 4MB boundary 129 offset = offset & ~0x3FFFFF 130 # We should not have a System Table at the top of the System Memory 131 offset = offset - 0x400000 132 133 # Start at top and look on 4MB boundaries for system table ptr structure 134 while offset > self.membase: 135 try: 136 signature = struct.unpack("cccccccc", self.ec.getMemoryService().read(str(offset), 8, 32)) 137 except DebugException: 138 raise Exception('SystemTable','Fail to access System Memory. Ensure all the memory in the region [0x%x;0x%X] is accessible.' % (membase,membase+memsize)) 139 if signature == SystemTable.CONST_ST_SIGNATURE: 140 found = True 141 if edk2_debugger.is_aarch64(self.ec): 142 self.system_table_base = self.ec.getMemoryService().readMemory64(offset + 0x8) 143 else: 144 self.system_table_base = self.ec.getMemoryService().readMemory32(offset + 0x8) 145 break 146 offset = offset - 0x400000 147 148 if not found: 149 raise Exception('SystemTable','System Table not found in System Memory [0x%x;0x%X]' % (membase,membase+memsize)) 150 151 def get_configuration_table(self, conf_table_guid): 152 if edk2_debugger.is_aarch64(self.ec): 153 # Number of configuration Table entry 154 conf_table_entry_count = self.ec.getMemoryService().readMemory32(self.system_table_base + 0x68) 155 156 # Get location of the Configuration Table entries 157 conf_table_offset = self.ec.getMemoryService().readMemory64(self.system_table_base + 0x70) 158 else: 159 # Number of configuration Table entry 160 conf_table_entry_count = self.ec.getMemoryService().readMemory32(self.system_table_base + 0x40) 161 162 # Get location of the Configuration Table entries 163 conf_table_offset = self.ec.getMemoryService().readMemory32(self.system_table_base + 0x44) 164 165 for i in range(0, conf_table_entry_count): 166 if edk2_debugger.is_aarch64(self.ec): 167 offset = conf_table_offset + (i * 0x18) 168 else: 169 offset = conf_table_offset + (i * 0x14) 170 guid = struct.unpack("<IIII", self.ec.getMemoryService().read(str(offset), 16, 32)) 171 if guid == conf_table_guid: 172 if edk2_debugger.is_aarch64(self.ec): 173 return self.ec.getMemoryService().readMemory64(offset + 0x10) 174 else: 175 return self.ec.getMemoryService().readMemory32(offset + 0x10) 176 177 raise Exception('SystemTable','Configuration Table not found') 178
