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system76-edk2/ArmPlatformPkg/Scripts/Ds5/firmware_volume.py
Ard Biesheuvel 0ce8410ed7 ArmPlatformPkg: bring DS-5 scripts in line with linker script changes 
The ARM and AARCH64 linker scripts have recently been updated so that
the memory layouts of the ELF and PE/COFF versions of each module are
identical. In particular, this means that the ELF images now have a
hole before the first section rather than starting at offset 0x0, which
means we no longer have to correct for this difference when loading the
ELF image into the debugger.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Leif Lindholm <leif.lindholm@linaro.org>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18775 6f19259b-4bc3-4df7-8a09-765794883524
2015-11-12 07:29:21 +00:00

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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.
#
from arm_ds.debugger_v1 import DebugException
import struct
import string
import edk2_debugger
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
return self.base_te - 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):
return self.base_pe32
class EfiSectionPE64:
def __init__(self, ec, base_pe64):
self.ec = ec
self.base_pe64 = base_pe64
def get_debug_filepath(self):
# Offset from dos hdr to PE file hdr (EFI_IMAGE_NT_HEADERS64)
#file_header_offset = self.ec.getMemoryService().readMemory32(self.base_pe64 + 0x3C)
file_header_offset = 0x0
# Offset to debug dir in PE hdrs
debug_dir_entry_rva = self.ec.getMemoryService().readMemory32(self.base_pe64 + file_header_offset + 0x138)
if debug_dir_entry_rva == 0:
raise Exception("EfiFileSectionPE64","No Debug Directory")
debug_type = self.ec.getMemoryService().readMemory32(self.base_pe64 + debug_dir_entry_rva + 0xC)
if (debug_type != 0xdf) and (debug_type != EfiFileSection.EFI_IMAGE_DEBUG_TYPE_CODEVIEW):
raise Exception("EfiFileSectionPE64","Debug type is not dwarf")
debug_rva = self.ec.getMemoryService().readMemory32(self.base_pe64 + debug_dir_entry_rva + 0x14)
dwarf_sig = struct.unpack("cccc", self.ec.getMemoryService().read(str(self.base_pe64 + debug_rva), 4, 32))
if (dwarf_sig != 0x66727764) and (dwarf_sig != FirmwareFile.CONST_NB10_SIGNATURE):
raise Exception("EfiFileSectionPE64","Dwarf debug signature not found")
if dwarf_sig == 0x66727764:
filename = self.base_pe64 + debug_rva + 0xc
else:
filename = self.base_pe64 + 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):
return self.base_pe64
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, verbose = False):
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')
try:
edk2_debugger.load_symbol_from_file(self.ec, section.get_debug_filepath(), section.get_debug_elfbase(), verbose)
except Exception, (ErrorClass, ErrorMessage):
if verbose:
print "Error while loading a symbol file (%s: %s)" % (ErrorClass, ErrorMessage)
return debug_info
def load_all_symbols(self, verbose = False):
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
try:
edk2_debugger.load_symbol_from_file(self.ec, section.get_debug_filepath(), section.get_debug_elfbase(), verbose)
except Exception, (ErrorClass, ErrorMessage):
if verbose:
print "Error while loading a symbol file (%s: %s)" % (ErrorClass, ErrorMessage)
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