diff options
Diffstat (limited to 'ArmPlatformPkg/Scripts/Ds5/firmware_volume.py')
| -rw-r--r-- | ArmPlatformPkg/Scripts/Ds5/firmware_volume.py | 299 |
1 files changed, 299 insertions, 0 deletions
diff --git a/ArmPlatformPkg/Scripts/Ds5/firmware_volume.py b/ArmPlatformPkg/Scripts/Ds5/firmware_volume.py new file mode 100644 index 0000000000..01f8597e5f --- /dev/null +++ b/ArmPlatformPkg/Scripts/Ds5/firmware_volume.py @@ -0,0 +1,299 @@ +# +# Copyright (c) 2011-2012, 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. +# + +from arm_ds.debugger_v1 import DebugException + +import struct +import string + +class EfiFileSection(object): + EFI_SECTION_PE32 = 0x10 + EFI_SECTION_PIC = 0x11 + EFI_SECTION_TE = 0x12 + + EFI_IMAGE_DEBUG_TYPE_CODEVIEW = 0x2 + + SIZEOF_EFI_FFS_FILE_HEADER = 0x28 + + def __init__(self, ec, base): + self.base = base + self.ec = ec + + def __str__(self): + return "FileSection(type:0x%X, size:0x%x)" % (self.get_type(), self.get_size()) + + def get_base(self): + return self.base + + def get_type(self): + return struct.unpack("B", self.ec.getMemoryService().read(self.base + 0x3, 1, 8))[0] + + def get_size(self): + return (struct.unpack("<I", self.ec.getMemoryService().read(self.base, 4, 32))[0] & 0x00ffffff) + + def get_debug_filepath(self): + type = self.get_type() + if type == EfiFileSection.EFI_SECTION_TE: + section = EfiSectionTE(self, ec, self.base + 0x4) + elif type == EfiFileSection.EFI_SECTION_PE32: + section = EfiSectionPE32(self, ec, self.base + 0x4) + else: + raise Exception("EfiFileSection", "No debug section") + return section.get_debug_filepath() + +class EfiSectionTE: + SIZEOF_EFI_TE_IMAGE_HEADER = 0x28 + EFI_TE_IMAGE_SIGNATURE = ('V','Z') + + def __init__(self, ec, base_te): + self.ec = ec + self.base_te = int(base_te) + te_sig = struct.unpack("cc", self.ec.getMemoryService().read(self.base_te, 2, 32)) + if te_sig != EfiSectionTE.EFI_TE_IMAGE_SIGNATURE: + raise Exception("EfiFileSectionTE","TE Signature incorrect") + + def get_debug_filepath(self): + stripped_size = struct.unpack("<H", self.ec.getMemoryService().read(self.base_te + 0x6, 2, 32))[0] + stripped_size -= EfiSectionTE.SIZEOF_EFI_TE_IMAGE_HEADER + + debug_dir_entry_rva = self.ec.getMemoryService().readMemory32(self.base_te + 0x20) + if debug_dir_entry_rva == 0: + raise Exception("EfiFileSectionTE","No debug directory for image") + debug_dir_entry_rva -= stripped_size + + debug_type = self.ec.getMemoryService().readMemory32(self.base_te + debug_dir_entry_rva + 0xC) + if (debug_type != 0xdf) and (debug_type != EfiFileSection.EFI_IMAGE_DEBUG_TYPE_CODEVIEW): + raise Exception("EfiFileSectionTE","Debug type is not dwarf") + + debug_rva = self.ec.getMemoryService().readMemory32(self.base_te + debug_dir_entry_rva + 0x14) + debug_rva -= stripped_size + + dwarf_sig = struct.unpack("cccc", self.ec.getMemoryService().read(self.base_te + debug_rva, 4, 32)) + if (dwarf_sig != 0x66727764) and (dwarf_sig != FirmwareFile.CONST_NB10_SIGNATURE): + raise Exception("EfiFileSectionTE","Dwarf debug signature not found") + + if dwarf_sig == 0x66727764: + filename = self.base_te + debug_rva + 0xc + else: + filename = self.base_te + debug_rva + 0x10 + filename = struct.unpack("200s", self.ec.getMemoryService().read(filename, 200, 32))[0] + return filename[0:string.find(filename,'\0')] + + def get_debug_elfbase(self): + stripped_size = struct.unpack("<H", self.ec.getMemoryService().read(self.base_te + 0x6, 2, 32))[0] + stripped_size -= EfiSectionTE.SIZEOF_EFI_TE_IMAGE_HEADER + + base_of_code = self.ec.getMemoryService().readMemory32(self.base_te + 0xC) + + return self.base_te + base_of_code - stripped_size + +class EfiSectionPE32: + def __init__(self, ec, base_pe32): + self.ec = ec + self.base_pe32 = base_pe32 + + def get_debug_filepath(self): + # Offset from dos hdr to PE file hdr + file_header_offset = self.ec.getMemoryService().readMemory32(self.base_pe32 + 0x3C) + + # Offset to debug dir in PE hdrs + debug_dir_entry_rva = self.ec.getMemoryService().readMemory32(self.base_pe32 + file_header_offset + 0xA8) + if debug_dir_entry_rva == 0: + raise Exception("EfiFileSectionPE32","No Debug Directory") + + debug_type = self.ec.getMemoryService().readMemory32(self.base_pe32 + debug_dir_entry_rva + 0xC) + if (debug_type != 0xdf) and (debug_type != EfiFileSection.EFI_IMAGE_DEBUG_TYPE_CODEVIEW): + raise Exception("EfiFileSectionPE32","Debug type is not dwarf") + + + debug_rva = self.ec.getMemoryService().readMemory32(self.base_pe32 + debug_dir_entry_rva + 0x14) + + dwarf_sig = struct.unpack("cccc", self.ec.getMemoryService().read(str(self.base_pe32 + debug_rva), 4, 32)) + if (dwarf_sig != 0x66727764) and (dwarf_sig != FirmwareFile.CONST_NB10_SIGNATURE): + raise Exception("EfiFileSectionPE32","Dwarf debug signature not found") + + if dwarf_sig == 0x66727764: + filename = self.base_pe32 + debug_rva + 0xc + else: + filename = self.base_pe32 + debug_rva + 0x10 + filename = struct.unpack("200s", self.ec.getMemoryService().read(str(filename), 200, 32))[0] + return filename[0:string.find(filename,'\0')] + + def get_debug_elfbase(self): + # Offset from dos hdr to PE file hdr + pe_file_header = self.base_pe32 + self.ec.getMemoryService().readMemory32(self.base_pe32 + 0x3C) + + base_of_code = self.base_pe32 + self.ec.getMemoryService().readMemory32(pe_file_header + 0x28) + base_of_data = self.base_pe32 + self.ec.getMemoryService().readMemory32(pe_file_header + 0x2C) + + if (base_of_code < base_of_data) and (base_of_code != 0): + return base_of_code + else: + return base_of_data + +class FirmwareFile: + EFI_FV_FILETYPE_RAW = 0x01 + EFI_FV_FILETYPE_FREEFORM = 0x02 + EFI_FV_FILETYPE_SECURITY_CORE = 0x03 + EFI_FV_FILETYPE_PEI_CORE = 0x04 + EFI_FV_FILETYPE_DXE_CORE = 0x05 + EFI_FV_FILETYPE_PEIM = 0x06 + EFI_FV_FILETYPE_DRIVER = 0x07 + EFI_FV_FILETYPE_COMBINED_PEIM_DRIVER = 0x08 + EFI_FV_FILETYPE_APPLICATION = 0x09 + EFI_FV_FILETYPE_FIRMWARE_VOLUME_IMAGE = 0x0B + EFI_FV_FILETYPE_FFS_MIN = 0xF0 + + CONST_NB10_SIGNATURE = ('N','B','1','0') + + def __init__(self, fv, base, ec): + self.fv = fv + self.base = base + self.ec = ec + + def __str__(self): + return "FFS(state:0x%x, type:0x%X, size:0x%x)" % (self.get_state(), self.get_type(), self.get_size()) + + def get_base(self): + return self.base + + def get_size(self): + size = (self.ec.getMemoryService().readMemory32(self.base + 0x14) & 0x00ffffff) + + # Occupied size is the size considering the alignment + return size + ((0x8 - (size & 0x7)) & 0x7) + + def get_type(self): + return self.ec.getMemoryService().readMemory8(self.base + 0x12) + + def get_state(self): + state = self.ec.getMemoryService().readMemory8(self.base + 0x17) + + polarity = self.fv.get_polarity() + if polarity: + state = ~state + + highest_bit = 0x80; + while (highest_bit != 0) and ((highest_bit & state) == 0): + highest_bit >>= 1 + + return highest_bit + + def get_next_section(self, section=None): + if section == None: + if self.get_type() != FirmwareFile.EFI_FV_FILETYPE_FFS_MIN: + section_base = self.get_base() + 0x18; + else: + return None + else: + section_base = int(section.get_base() + section.get_size()) + + # Align to next 4 byte boundary + if (section_base & 0x3) != 0: + section_base = section_base + 0x4 - (section_base & 0x3) + + if section_base < self.get_base() + self.get_size(): + return EfiFileSection(self.ec, section_base) + else: + return None + +class FirmwareVolume: + CONST_FV_SIGNATURE = ('_','F','V','H') + EFI_FVB2_ERASE_POLARITY = 0x800 + + DebugInfos = [] + + def __init__(self, ec, fv_base, fv_size): + self.ec = ec + self.fv_base = fv_base + self.fv_size = fv_size + + try: + signature = struct.unpack("cccc", self.ec.getMemoryService().read(fv_base + 0x28, 4, 32)) + except DebugException: + raise Exception("FirmwareVolume", "Not possible to access the defined firmware volume at [0x%X,0x%X]. Could be the used build report does not correspond to your current debugging context." % (int(fv_base),int(fv_base+fv_size))) + if signature != FirmwareVolume.CONST_FV_SIGNATURE: + raise Exception("FirmwareVolume", "This is not a valid firmware volume") + + def get_size(self): + return self.ec.getMemoryService().readMemory32(self.fv_base + 0x20) + + def get_attributes(self): + return self.ec.getMemoryService().readMemory32(self.fv_base + 0x2C) + + def get_polarity(self): + attributes = self.get_attributes() + if attributes & FirmwareVolume.EFI_FVB2_ERASE_POLARITY: + return 1 + else: + return 0 + + def get_next_ffs(self, ffs=None): + if ffs == None: + # Get the offset of the first FFS file from the FV header + ffs_base = self.fv_base + self.ec.getMemoryService().readMemory16(self.fv_base + 0x30) + else: + # Goto the next FFS file + ffs_base = int(ffs.get_base() + ffs.get_size()) + + # Align to next 8 byte boundary + if (ffs_base & 0x7) != 0: + ffs_base = ffs_base + 0x8 - (ffs_base & 0x7) + + if ffs_base < self.fv_base + self.get_size(): + return FirmwareFile(self, ffs_base, self.ec) + else: + return None + + def get_debug_info(self): + self.DebugInfos = [] + + ffs = self.get_next_ffs() + while ffs != None: + section = ffs.get_next_section() + while section != None: + type = section.get_type() + if (type == EfiFileSection.EFI_SECTION_TE) or (type == EfiFileSection.EFI_SECTION_PE32): + self.DebugInfos.append((section.get_base(), section.get_size(), section.get_type())) + section = ffs.get_next_section(section) + ffs = self.get_next_ffs(ffs) + + def load_symbols_at(self, addr): + if self.DebugInfos == []: + self.get_debug_info() + + for debug_info in self.DebugInfos: + if (addr >= debug_info[0]) and (addr < debug_info[0] + debug_info[1]): + if debug_info[2] == EfiFileSection.EFI_SECTION_TE: + section = EfiSectionTE(self.ec, debug_info[0] + 0x4) + elif debug_info[2] == EfiFileSection.EFI_SECTION_PE32: + section = EfiSectionPE32(self.ec, debug_info[0] + 0x4) + else: + raise Exception('FirmwareVolume','Section Type not supported') + + edk2_debugger.load_symbol_from_file(self.ec, section.get_debug_filepath(), section.get_debug_elfbase()) + + return debug_info + + def load_all_symbols(self): + if self.DebugInfos == []: + self.get_debug_info() + + for debug_info in self.DebugInfos: + if debug_info[2] == EfiFileSection.EFI_SECTION_TE: + section = EfiSectionTE(self.ec, debug_info[0] + 0x4) + elif debug_info[2] == EfiFileSection.EFI_SECTION_PE32: + section = EfiSectionPE32(self.ec, debug_info[0] + 0x4) + else: + continue + + edk2_debugger.load_symbol_from_file(self.ec, section.get_debug_filepath(), section.get_debug_elfbase()) |