2 # Copyright (c) 2011-2013, ARM Limited. All rights reserved.
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
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.
13 from arm_ds
.debugger_v1
import DebugException
20 class EfiFileSection(object):
21 EFI_SECTION_PE32
= 0x10
22 EFI_SECTION_PIC
= 0x11
25 EFI_IMAGE_DEBUG_TYPE_CODEVIEW
= 0x2
27 SIZEOF_EFI_FFS_FILE_HEADER
= 0x28
29 def __init__(self
, ec
, base
):
34 return "FileSection(type:0x%X, size:0x%x)" % (self
.get_type(), self
.get_size())
40 return struct
.unpack("B", self
.ec
.getMemoryService().read(self
.base
+ 0x3, 1, 8))[0]
43 return (struct
.unpack("<I", self
.ec
.getMemoryService().read(self
.base
, 4, 32))[0] & 0x00ffffff)
45 def get_debug_filepath(self
):
46 type = self
.get_type()
47 if type == EfiFileSection
.EFI_SECTION_TE
:
48 section
= EfiSectionTE(self
, ec
, self
.base
+ 0x4)
49 elif type == EfiFileSection
.EFI_SECTION_PE32
:
50 section
= EfiSectionPE32(self
, ec
, self
.base
+ 0x4)
52 raise Exception("EfiFileSection", "No debug section")
53 return section
.get_debug_filepath()
56 SIZEOF_EFI_TE_IMAGE_HEADER
= 0x28
57 EFI_TE_IMAGE_SIGNATURE
= ('V','Z')
59 def __init__(self
, ec
, base_te
):
61 self
.base_te
= int(base_te
)
62 te_sig
= struct
.unpack("cc", self
.ec
.getMemoryService().read(self
.base_te
, 2, 32))
63 if te_sig
!= EfiSectionTE
.EFI_TE_IMAGE_SIGNATURE
:
64 raise Exception("EfiFileSectionTE","TE Signature incorrect")
66 def get_debug_filepath(self
):
67 stripped_size
= struct
.unpack("<H", self
.ec
.getMemoryService().read(self
.base_te
+ 0x6, 2, 32))[0]
68 stripped_size
-= EfiSectionTE
.SIZEOF_EFI_TE_IMAGE_HEADER
70 debug_dir_entry_rva
= self
.ec
.getMemoryService().readMemory32(self
.base_te
+ 0x20)
71 if debug_dir_entry_rva
== 0:
72 raise Exception("EfiFileSectionTE","No debug directory for image")
73 debug_dir_entry_rva
-= stripped_size
75 debug_type
= self
.ec
.getMemoryService().readMemory32(self
.base_te
+ debug_dir_entry_rva
+ 0xC)
76 if (debug_type
!= 0xdf) and (debug_type
!= EfiFileSection
.EFI_IMAGE_DEBUG_TYPE_CODEVIEW
):
77 raise Exception("EfiFileSectionTE","Debug type is not dwarf")
79 debug_rva
= self
.ec
.getMemoryService().readMemory32(self
.base_te
+ debug_dir_entry_rva
+ 0x14)
80 debug_rva
-= stripped_size
82 dwarf_sig
= struct
.unpack("cccc", self
.ec
.getMemoryService().read(self
.base_te
+ debug_rva
, 4, 32))
83 if (dwarf_sig
!= 0x66727764) and (dwarf_sig
!= FirmwareFile
.CONST_NB10_SIGNATURE
):
84 raise Exception("EfiFileSectionTE","Dwarf debug signature not found")
86 if dwarf_sig
== 0x66727764:
87 filename
= self
.base_te
+ debug_rva
+ 0xc
89 filename
= self
.base_te
+ debug_rva
+ 0x10
90 filename
= struct
.unpack("200s", self
.ec
.getMemoryService().read(filename
, 200, 32))[0]
91 return filename
[0:string
.find(filename
,'\0')]
93 def get_debug_elfbase(self
):
94 stripped_size
= struct
.unpack("<H", self
.ec
.getMemoryService().read(self
.base_te
+ 0x6, 2, 32))[0]
95 stripped_size
-= EfiSectionTE
.SIZEOF_EFI_TE_IMAGE_HEADER
97 base_of_code
= self
.ec
.getMemoryService().readMemory32(self
.base_te
+ 0xC)
99 return self
.base_te
+ base_of_code
- stripped_size
101 class EfiSectionPE32
:
102 def __init__(self
, ec
, base_pe32
):
104 self
.base_pe32
= base_pe32
106 def get_debug_filepath(self
):
107 # Offset from dos hdr to PE file hdr
108 file_header_offset
= self
.ec
.getMemoryService().readMemory32(self
.base_pe32
+ 0x3C)
110 # Offset to debug dir in PE hdrs
111 debug_dir_entry_rva
= self
.ec
.getMemoryService().readMemory32(self
.base_pe32
+ file_header_offset
+ 0xA8)
112 if debug_dir_entry_rva
== 0:
113 raise Exception("EfiFileSectionPE32","No Debug Directory")
115 debug_type
= self
.ec
.getMemoryService().readMemory32(self
.base_pe32
+ debug_dir_entry_rva
+ 0xC)
116 if (debug_type
!= 0xdf) and (debug_type
!= EfiFileSection
.EFI_IMAGE_DEBUG_TYPE_CODEVIEW
):
117 raise Exception("EfiFileSectionPE32","Debug type is not dwarf")
120 debug_rva
= self
.ec
.getMemoryService().readMemory32(self
.base_pe32
+ debug_dir_entry_rva
+ 0x14)
122 dwarf_sig
= struct
.unpack("cccc", self
.ec
.getMemoryService().read(str(self
.base_pe32
+ debug_rva
), 4, 32))
123 if (dwarf_sig
!= 0x66727764) and (dwarf_sig
!= FirmwareFile
.CONST_NB10_SIGNATURE
):
124 raise Exception("EfiFileSectionPE32","Dwarf debug signature not found")
126 if dwarf_sig
== 0x66727764:
127 filename
= self
.base_pe32
+ debug_rva
+ 0xc
129 filename
= self
.base_pe32
+ debug_rva
+ 0x10
130 filename
= struct
.unpack("200s", self
.ec
.getMemoryService().read(str(filename
), 200, 32))[0]
131 return filename
[0:string
.find(filename
,'\0')]
133 def get_debug_elfbase(self
):
134 # Offset from dos hdr to PE file hdr
135 pe_file_header
= self
.base_pe32
+ self
.ec
.getMemoryService().readMemory32(self
.base_pe32
+ 0x3C)
137 base_of_code
= self
.base_pe32
+ self
.ec
.getMemoryService().readMemory32(pe_file_header
+ 0x28)
138 base_of_data
= self
.base_pe32
+ self
.ec
.getMemoryService().readMemory32(pe_file_header
+ 0x2C)
140 if (base_of_code
< base_of_data
) and (base_of_code
!= 0):
146 EFI_FV_FILETYPE_RAW
= 0x01
147 EFI_FV_FILETYPE_FREEFORM
= 0x02
148 EFI_FV_FILETYPE_SECURITY_CORE
= 0x03
149 EFI_FV_FILETYPE_PEI_CORE
= 0x04
150 EFI_FV_FILETYPE_DXE_CORE
= 0x05
151 EFI_FV_FILETYPE_PEIM
= 0x06
152 EFI_FV_FILETYPE_DRIVER
= 0x07
153 EFI_FV_FILETYPE_COMBINED_PEIM_DRIVER
= 0x08
154 EFI_FV_FILETYPE_APPLICATION
= 0x09
155 EFI_FV_FILETYPE_FIRMWARE_VOLUME_IMAGE
= 0x0B
156 EFI_FV_FILETYPE_FFS_MIN
= 0xF0
158 CONST_NB10_SIGNATURE
= ('N','B','1','0')
160 def __init__(self
, fv
, base
, ec
):
166 return "FFS(state:0x%x, type:0x%X, size:0x%x)" % (self
.get_state(), self
.get_type(), self
.get_size())
172 size
= (self
.ec
.getMemoryService().readMemory32(self
.base
+ 0x14) & 0x00ffffff)
174 # Occupied size is the size considering the alignment
175 return size
+ ((0x8 - (size
& 0x7)) & 0x7)
178 return self
.ec
.getMemoryService().readMemory8(self
.base
+ 0x12)
181 state
= self
.ec
.getMemoryService().readMemory8(self
.base
+ 0x17)
183 polarity
= self
.fv
.get_polarity()
188 while (highest_bit
!= 0) and ((highest_bit
& state
) == 0):
193 def get_next_section(self
, section
=None):
195 if self
.get_type() != FirmwareFile
.EFI_FV_FILETYPE_FFS_MIN
:
196 section_base
= self
.get_base() + 0x18;
200 section_base
= int(section
.get_base() + section
.get_size())
202 # Align to next 4 byte boundary
203 if (section_base
& 0x3) != 0:
204 section_base
= section_base
+ 0x4 - (section_base
& 0x3)
206 if section_base
< self
.get_base() + self
.get_size():
207 return EfiFileSection(self
.ec
, section_base
)
211 class FirmwareVolume
:
212 CONST_FV_SIGNATURE
= ('_','F','V','H')
213 EFI_FVB2_ERASE_POLARITY
= 0x800
217 def __init__(self
, ec
, fv_base
, fv_size
):
219 self
.fv_base
= fv_base
220 self
.fv_size
= fv_size
223 signature
= struct
.unpack("cccc", self
.ec
.getMemoryService().read(fv_base
+ 0x28, 4, 32))
224 except DebugException
:
225 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
)))
226 if signature
!= FirmwareVolume
.CONST_FV_SIGNATURE
:
227 raise Exception("FirmwareVolume", "This is not a valid firmware volume")
230 return self
.ec
.getMemoryService().readMemory32(self
.fv_base
+ 0x20)
232 def get_attributes(self
):
233 return self
.ec
.getMemoryService().readMemory32(self
.fv_base
+ 0x2C)
235 def get_polarity(self
):
236 attributes
= self
.get_attributes()
237 if attributes
& FirmwareVolume
.EFI_FVB2_ERASE_POLARITY
:
242 def get_next_ffs(self
, ffs
=None):
244 # Get the offset of the first FFS file from the FV header
245 ffs_base
= self
.fv_base
+ self
.ec
.getMemoryService().readMemory16(self
.fv_base
+ 0x30)
247 # Goto the next FFS file
248 ffs_base
= int(ffs
.get_base() + ffs
.get_size())
250 # Align to next 8 byte boundary
251 if (ffs_base
& 0x7) != 0:
252 ffs_base
= ffs_base
+ 0x8 - (ffs_base
& 0x7)
254 if ffs_base
< self
.fv_base
+ self
.get_size():
255 return FirmwareFile(self
, ffs_base
, self
.ec
)
259 def get_debug_info(self
):
262 ffs
= self
.get_next_ffs()
264 section
= ffs
.get_next_section()
265 while section
!= None:
266 type = section
.get_type()
267 if (type == EfiFileSection
.EFI_SECTION_TE
) or (type == EfiFileSection
.EFI_SECTION_PE32
):
268 self
.DebugInfos
.append((section
.get_base(), section
.get_size(), section
.get_type()))
269 section
= ffs
.get_next_section(section
)
270 ffs
= self
.get_next_ffs(ffs
)
272 def load_symbols_at(self
, addr
, verbose
= False):
273 if self
.DebugInfos
== []:
274 self
.get_debug_info()
276 for debug_info
in self
.DebugInfos
:
277 if (addr
>= debug_info
[0]) and (addr
< debug_info
[0] + debug_info
[1]):
278 if debug_info
[2] == EfiFileSection
.EFI_SECTION_TE
:
279 section
= EfiSectionTE(self
.ec
, debug_info
[0] + 0x4)
280 elif debug_info
[2] == EfiFileSection
.EFI_SECTION_PE32
:
281 section
= EfiSectionPE32(self
.ec
, debug_info
[0] + 0x4)
283 raise Exception('FirmwareVolume','Section Type not supported')
286 edk2_debugger
.load_symbol_from_file(self
.ec
, section
.get_debug_filepath(), section
.get_debug_elfbase(), verbose
)
287 except Exception, (ErrorClass
, ErrorMessage
):
289 print "Error while loading a symbol file (%s: %s)" % (ErrorClass
, ErrorMessage
)
294 def load_all_symbols(self
, verbose
= False):
295 if self
.DebugInfos
== []:
296 self
.get_debug_info()
298 for debug_info
in self
.DebugInfos
:
299 if debug_info
[2] == EfiFileSection
.EFI_SECTION_TE
:
300 section
= EfiSectionTE(self
.ec
, debug_info
[0] + 0x4)
301 elif debug_info
[2] == EfiFileSection
.EFI_SECTION_PE32
:
302 section
= EfiSectionPE32(self
.ec
, debug_info
[0] + 0x4)
307 edk2_debugger
.load_symbol_from_file(self
.ec
, section
.get_debug_filepath(), section
.get_debug_elfbase(), verbose
)
308 except Exception, (ErrorClass
, ErrorMessage
):
310 print "Error while loading a symbol file (%s: %s)" % (ErrorClass
, ErrorMessage
)