'the' has a tendency to double up; squash them back down. Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20191104185202.102504-1-dgilbert@redhat.com> [lv: removed disas/libvixl/vixl/invalset.h change] Signed-off-by: Laurent Vivier <laurent@vivier.eu>
600 lines
20 KiB
Python
600 lines
20 KiB
Python
"""
|
|
This python script adds a new gdb command, "dump-guest-memory". It
|
|
should be loaded with "source dump-guest-memory.py" at the (gdb)
|
|
prompt.
|
|
|
|
Copyright (C) 2013, Red Hat, Inc.
|
|
|
|
Authors:
|
|
Laszlo Ersek <lersek@redhat.com>
|
|
Janosch Frank <frankja@linux.vnet.ibm.com>
|
|
|
|
This work is licensed under the terms of the GNU GPL, version 2 or later. See
|
|
the COPYING file in the top-level directory.
|
|
"""
|
|
from __future__ import print_function
|
|
|
|
import ctypes
|
|
import struct
|
|
|
|
try:
|
|
UINTPTR_T = gdb.lookup_type("uintptr_t")
|
|
except Exception as inst:
|
|
raise gdb.GdbError("Symbols must be loaded prior to sourcing dump-guest-memory.\n"
|
|
"Symbols may be loaded by 'attach'ing a QEMU process id or by "
|
|
"'load'ing a QEMU binary.")
|
|
|
|
TARGET_PAGE_SIZE = 0x1000
|
|
TARGET_PAGE_MASK = 0xFFFFFFFFFFFFF000
|
|
|
|
# Special value for e_phnum. This indicates that the real number of
|
|
# program headers is too large to fit into e_phnum. Instead the real
|
|
# value is in the field sh_info of section 0.
|
|
PN_XNUM = 0xFFFF
|
|
|
|
EV_CURRENT = 1
|
|
|
|
ELFCLASS32 = 1
|
|
ELFCLASS64 = 2
|
|
|
|
ELFDATA2LSB = 1
|
|
ELFDATA2MSB = 2
|
|
|
|
ET_CORE = 4
|
|
|
|
PT_LOAD = 1
|
|
PT_NOTE = 4
|
|
|
|
EM_386 = 3
|
|
EM_PPC = 20
|
|
EM_PPC64 = 21
|
|
EM_S390 = 22
|
|
EM_AARCH = 183
|
|
EM_X86_64 = 62
|
|
|
|
VMCOREINFO_FORMAT_ELF = 1
|
|
|
|
def le16_to_cpu(val):
|
|
return struct.unpack("<H", struct.pack("=H", val))[0]
|
|
|
|
def le32_to_cpu(val):
|
|
return struct.unpack("<I", struct.pack("=I", val))[0]
|
|
|
|
def le64_to_cpu(val):
|
|
return struct.unpack("<Q", struct.pack("=Q", val))[0]
|
|
|
|
class ELF(object):
|
|
"""Representation of a ELF file."""
|
|
|
|
def __init__(self, arch):
|
|
self.ehdr = None
|
|
self.notes = []
|
|
self.segments = []
|
|
self.notes_size = 0
|
|
self.endianness = None
|
|
self.elfclass = ELFCLASS64
|
|
|
|
if arch == 'aarch64-le':
|
|
self.endianness = ELFDATA2LSB
|
|
self.elfclass = ELFCLASS64
|
|
self.ehdr = get_arch_ehdr(self.endianness, self.elfclass)
|
|
self.ehdr.e_machine = EM_AARCH
|
|
|
|
elif arch == 'aarch64-be':
|
|
self.endianness = ELFDATA2MSB
|
|
self.ehdr = get_arch_ehdr(self.endianness, self.elfclass)
|
|
self.ehdr.e_machine = EM_AARCH
|
|
|
|
elif arch == 'X86_64':
|
|
self.endianness = ELFDATA2LSB
|
|
self.ehdr = get_arch_ehdr(self.endianness, self.elfclass)
|
|
self.ehdr.e_machine = EM_X86_64
|
|
|
|
elif arch == '386':
|
|
self.endianness = ELFDATA2LSB
|
|
self.elfclass = ELFCLASS32
|
|
self.ehdr = get_arch_ehdr(self.endianness, self.elfclass)
|
|
self.ehdr.e_machine = EM_386
|
|
|
|
elif arch == 's390':
|
|
self.endianness = ELFDATA2MSB
|
|
self.ehdr = get_arch_ehdr(self.endianness, self.elfclass)
|
|
self.ehdr.e_machine = EM_S390
|
|
|
|
elif arch == 'ppc64-le':
|
|
self.endianness = ELFDATA2LSB
|
|
self.ehdr = get_arch_ehdr(self.endianness, self.elfclass)
|
|
self.ehdr.e_machine = EM_PPC64
|
|
|
|
elif arch == 'ppc64-be':
|
|
self.endianness = ELFDATA2MSB
|
|
self.ehdr = get_arch_ehdr(self.endianness, self.elfclass)
|
|
self.ehdr.e_machine = EM_PPC64
|
|
|
|
else:
|
|
raise gdb.GdbError("No valid arch type specified.\n"
|
|
"Currently supported types:\n"
|
|
"aarch64-be, aarch64-le, X86_64, 386, s390, "
|
|
"ppc64-be, ppc64-le")
|
|
|
|
self.add_segment(PT_NOTE, 0, 0)
|
|
|
|
def add_note(self, n_name, n_desc, n_type):
|
|
"""Adds a note to the ELF."""
|
|
|
|
note = get_arch_note(self.endianness, len(n_name), len(n_desc))
|
|
note.n_namesz = len(n_name) + 1
|
|
note.n_descsz = len(n_desc)
|
|
note.n_name = n_name.encode()
|
|
note.n_type = n_type
|
|
|
|
# Desc needs to be 4 byte aligned (although the 64bit spec
|
|
# specifies 8 byte). When defining n_desc as uint32 it will be
|
|
# automatically aligned but we need the memmove to copy the
|
|
# string into it.
|
|
ctypes.memmove(note.n_desc, n_desc.encode(), len(n_desc))
|
|
|
|
self.notes.append(note)
|
|
self.segments[0].p_filesz += ctypes.sizeof(note)
|
|
self.segments[0].p_memsz += ctypes.sizeof(note)
|
|
|
|
|
|
def add_vmcoreinfo_note(self, vmcoreinfo):
|
|
"""Adds a vmcoreinfo note to the ELF dump."""
|
|
# compute the header size, and copy that many bytes from the note
|
|
header = get_arch_note(self.endianness, 0, 0)
|
|
ctypes.memmove(ctypes.pointer(header),
|
|
vmcoreinfo, ctypes.sizeof(header))
|
|
if header.n_descsz > 1 << 20:
|
|
print('warning: invalid vmcoreinfo size')
|
|
return
|
|
# now get the full note
|
|
note = get_arch_note(self.endianness,
|
|
header.n_namesz - 1, header.n_descsz)
|
|
ctypes.memmove(ctypes.pointer(note), vmcoreinfo, ctypes.sizeof(note))
|
|
|
|
self.notes.append(note)
|
|
self.segments[0].p_filesz += ctypes.sizeof(note)
|
|
self.segments[0].p_memsz += ctypes.sizeof(note)
|
|
|
|
def add_segment(self, p_type, p_paddr, p_size):
|
|
"""Adds a segment to the elf."""
|
|
|
|
phdr = get_arch_phdr(self.endianness, self.elfclass)
|
|
phdr.p_type = p_type
|
|
phdr.p_paddr = p_paddr
|
|
phdr.p_vaddr = p_paddr
|
|
phdr.p_filesz = p_size
|
|
phdr.p_memsz = p_size
|
|
self.segments.append(phdr)
|
|
self.ehdr.e_phnum += 1
|
|
|
|
def to_file(self, elf_file):
|
|
"""Writes all ELF structures to the passed file.
|
|
|
|
Structure:
|
|
Ehdr
|
|
Segment 0:PT_NOTE
|
|
Segment 1:PT_LOAD
|
|
Segment N:PT_LOAD
|
|
Note 0..N
|
|
Dump contents
|
|
"""
|
|
elf_file.write(self.ehdr)
|
|
off = ctypes.sizeof(self.ehdr) + \
|
|
len(self.segments) * ctypes.sizeof(self.segments[0])
|
|
|
|
for phdr in self.segments:
|
|
phdr.p_offset = off
|
|
elf_file.write(phdr)
|
|
off += phdr.p_filesz
|
|
|
|
for note in self.notes:
|
|
elf_file.write(note)
|
|
|
|
|
|
def get_arch_note(endianness, len_name, len_desc):
|
|
"""Returns a Note class with the specified endianness."""
|
|
|
|
if endianness == ELFDATA2LSB:
|
|
superclass = ctypes.LittleEndianStructure
|
|
else:
|
|
superclass = ctypes.BigEndianStructure
|
|
|
|
len_name = len_name + 1
|
|
|
|
class Note(superclass):
|
|
"""Represents an ELF note, includes the content."""
|
|
|
|
_fields_ = [("n_namesz", ctypes.c_uint32),
|
|
("n_descsz", ctypes.c_uint32),
|
|
("n_type", ctypes.c_uint32),
|
|
("n_name", ctypes.c_char * len_name),
|
|
("n_desc", ctypes.c_uint32 * ((len_desc + 3) // 4))]
|
|
return Note()
|
|
|
|
|
|
class Ident(ctypes.Structure):
|
|
"""Represents the ELF ident array in the ehdr structure."""
|
|
|
|
_fields_ = [('ei_mag0', ctypes.c_ubyte),
|
|
('ei_mag1', ctypes.c_ubyte),
|
|
('ei_mag2', ctypes.c_ubyte),
|
|
('ei_mag3', ctypes.c_ubyte),
|
|
('ei_class', ctypes.c_ubyte),
|
|
('ei_data', ctypes.c_ubyte),
|
|
('ei_version', ctypes.c_ubyte),
|
|
('ei_osabi', ctypes.c_ubyte),
|
|
('ei_abiversion', ctypes.c_ubyte),
|
|
('ei_pad', ctypes.c_ubyte * 7)]
|
|
|
|
def __init__(self, endianness, elfclass):
|
|
self.ei_mag0 = 0x7F
|
|
self.ei_mag1 = ord('E')
|
|
self.ei_mag2 = ord('L')
|
|
self.ei_mag3 = ord('F')
|
|
self.ei_class = elfclass
|
|
self.ei_data = endianness
|
|
self.ei_version = EV_CURRENT
|
|
|
|
|
|
def get_arch_ehdr(endianness, elfclass):
|
|
"""Returns a EHDR64 class with the specified endianness."""
|
|
|
|
if endianness == ELFDATA2LSB:
|
|
superclass = ctypes.LittleEndianStructure
|
|
else:
|
|
superclass = ctypes.BigEndianStructure
|
|
|
|
class EHDR64(superclass):
|
|
"""Represents the 64 bit ELF header struct."""
|
|
|
|
_fields_ = [('e_ident', Ident),
|
|
('e_type', ctypes.c_uint16),
|
|
('e_machine', ctypes.c_uint16),
|
|
('e_version', ctypes.c_uint32),
|
|
('e_entry', ctypes.c_uint64),
|
|
('e_phoff', ctypes.c_uint64),
|
|
('e_shoff', ctypes.c_uint64),
|
|
('e_flags', ctypes.c_uint32),
|
|
('e_ehsize', ctypes.c_uint16),
|
|
('e_phentsize', ctypes.c_uint16),
|
|
('e_phnum', ctypes.c_uint16),
|
|
('e_shentsize', ctypes.c_uint16),
|
|
('e_shnum', ctypes.c_uint16),
|
|
('e_shstrndx', ctypes.c_uint16)]
|
|
|
|
def __init__(self):
|
|
super(superclass, self).__init__()
|
|
self.e_ident = Ident(endianness, elfclass)
|
|
self.e_type = ET_CORE
|
|
self.e_version = EV_CURRENT
|
|
self.e_ehsize = ctypes.sizeof(self)
|
|
self.e_phoff = ctypes.sizeof(self)
|
|
self.e_phentsize = ctypes.sizeof(get_arch_phdr(endianness, elfclass))
|
|
self.e_phnum = 0
|
|
|
|
|
|
class EHDR32(superclass):
|
|
"""Represents the 32 bit ELF header struct."""
|
|
|
|
_fields_ = [('e_ident', Ident),
|
|
('e_type', ctypes.c_uint16),
|
|
('e_machine', ctypes.c_uint16),
|
|
('e_version', ctypes.c_uint32),
|
|
('e_entry', ctypes.c_uint32),
|
|
('e_phoff', ctypes.c_uint32),
|
|
('e_shoff', ctypes.c_uint32),
|
|
('e_flags', ctypes.c_uint32),
|
|
('e_ehsize', ctypes.c_uint16),
|
|
('e_phentsize', ctypes.c_uint16),
|
|
('e_phnum', ctypes.c_uint16),
|
|
('e_shentsize', ctypes.c_uint16),
|
|
('e_shnum', ctypes.c_uint16),
|
|
('e_shstrndx', ctypes.c_uint16)]
|
|
|
|
def __init__(self):
|
|
super(superclass, self).__init__()
|
|
self.e_ident = Ident(endianness, elfclass)
|
|
self.e_type = ET_CORE
|
|
self.e_version = EV_CURRENT
|
|
self.e_ehsize = ctypes.sizeof(self)
|
|
self.e_phoff = ctypes.sizeof(self)
|
|
self.e_phentsize = ctypes.sizeof(get_arch_phdr(endianness, elfclass))
|
|
self.e_phnum = 0
|
|
|
|
# End get_arch_ehdr
|
|
if elfclass == ELFCLASS64:
|
|
return EHDR64()
|
|
else:
|
|
return EHDR32()
|
|
|
|
|
|
def get_arch_phdr(endianness, elfclass):
|
|
"""Returns a 32 or 64 bit PHDR class with the specified endianness."""
|
|
|
|
if endianness == ELFDATA2LSB:
|
|
superclass = ctypes.LittleEndianStructure
|
|
else:
|
|
superclass = ctypes.BigEndianStructure
|
|
|
|
class PHDR64(superclass):
|
|
"""Represents the 64 bit ELF program header struct."""
|
|
|
|
_fields_ = [('p_type', ctypes.c_uint32),
|
|
('p_flags', ctypes.c_uint32),
|
|
('p_offset', ctypes.c_uint64),
|
|
('p_vaddr', ctypes.c_uint64),
|
|
('p_paddr', ctypes.c_uint64),
|
|
('p_filesz', ctypes.c_uint64),
|
|
('p_memsz', ctypes.c_uint64),
|
|
('p_align', ctypes.c_uint64)]
|
|
|
|
class PHDR32(superclass):
|
|
"""Represents the 32 bit ELF program header struct."""
|
|
|
|
_fields_ = [('p_type', ctypes.c_uint32),
|
|
('p_offset', ctypes.c_uint32),
|
|
('p_vaddr', ctypes.c_uint32),
|
|
('p_paddr', ctypes.c_uint32),
|
|
('p_filesz', ctypes.c_uint32),
|
|
('p_memsz', ctypes.c_uint32),
|
|
('p_flags', ctypes.c_uint32),
|
|
('p_align', ctypes.c_uint32)]
|
|
|
|
# End get_arch_phdr
|
|
if elfclass == ELFCLASS64:
|
|
return PHDR64()
|
|
else:
|
|
return PHDR32()
|
|
|
|
|
|
def int128_get64(val):
|
|
"""Returns low 64bit part of Int128 struct."""
|
|
|
|
try:
|
|
assert val["hi"] == 0
|
|
return val["lo"]
|
|
except gdb.error:
|
|
u64t = gdb.lookup_type('uint64_t').array(2)
|
|
u64 = val.cast(u64t)
|
|
if sys.byteorder == 'little':
|
|
assert u64[1] == 0
|
|
return u64[0]
|
|
else:
|
|
assert u64[0] == 0
|
|
return u64[1]
|
|
|
|
|
|
def qlist_foreach(head, field_str):
|
|
"""Generator for qlists."""
|
|
|
|
var_p = head["lh_first"]
|
|
while var_p != 0:
|
|
var = var_p.dereference()
|
|
var_p = var[field_str]["le_next"]
|
|
yield var
|
|
|
|
|
|
def qemu_map_ram_ptr(block, offset):
|
|
"""Returns qemu vaddr for given guest physical address."""
|
|
|
|
return block["host"] + offset
|
|
|
|
|
|
def memory_region_get_ram_ptr(memory_region):
|
|
if memory_region["alias"] != 0:
|
|
return (memory_region_get_ram_ptr(memory_region["alias"].dereference())
|
|
+ memory_region["alias_offset"])
|
|
|
|
return qemu_map_ram_ptr(memory_region["ram_block"], 0)
|
|
|
|
|
|
def get_guest_phys_blocks():
|
|
"""Returns a list of ram blocks.
|
|
|
|
Each block entry contains:
|
|
'target_start': guest block phys start address
|
|
'target_end': guest block phys end address
|
|
'host_addr': qemu vaddr of the block's start
|
|
"""
|
|
|
|
guest_phys_blocks = []
|
|
|
|
print("guest RAM blocks:")
|
|
print("target_start target_end host_addr message "
|
|
"count")
|
|
print("---------------- ---------------- ---------------- ------- "
|
|
"-----")
|
|
|
|
current_map_p = gdb.parse_and_eval("address_space_memory.current_map")
|
|
current_map = current_map_p.dereference()
|
|
|
|
# Conversion to int is needed for python 3
|
|
# compatibility. Otherwise range doesn't cast the value itself and
|
|
# breaks.
|
|
for cur in range(int(current_map["nr"])):
|
|
flat_range = (current_map["ranges"] + cur).dereference()
|
|
memory_region = flat_range["mr"].dereference()
|
|
|
|
# we only care about RAM
|
|
if (not memory_region["ram"] or
|
|
memory_region["ram_device"] or
|
|
memory_region["nonvolatile"]):
|
|
continue
|
|
|
|
section_size = int128_get64(flat_range["addr"]["size"])
|
|
target_start = int128_get64(flat_range["addr"]["start"])
|
|
target_end = target_start + section_size
|
|
host_addr = (memory_region_get_ram_ptr(memory_region)
|
|
+ flat_range["offset_in_region"])
|
|
predecessor = None
|
|
|
|
# find continuity in guest physical address space
|
|
if len(guest_phys_blocks) > 0:
|
|
predecessor = guest_phys_blocks[-1]
|
|
predecessor_size = (predecessor["target_end"] -
|
|
predecessor["target_start"])
|
|
|
|
# the memory API guarantees monotonically increasing
|
|
# traversal
|
|
assert predecessor["target_end"] <= target_start
|
|
|
|
# we want continuity in both guest-physical and
|
|
# host-virtual memory
|
|
if (predecessor["target_end"] < target_start or
|
|
predecessor["host_addr"] + predecessor_size != host_addr):
|
|
predecessor = None
|
|
|
|
if predecessor is None:
|
|
# isolated mapping, add it to the list
|
|
guest_phys_blocks.append({"target_start": target_start,
|
|
"target_end": target_end,
|
|
"host_addr": host_addr})
|
|
message = "added"
|
|
else:
|
|
# expand predecessor until @target_end; predecessor's
|
|
# start doesn't change
|
|
predecessor["target_end"] = target_end
|
|
message = "joined"
|
|
|
|
print("%016x %016x %016x %-7s %5u" %
|
|
(target_start, target_end, host_addr.cast(UINTPTR_T),
|
|
message, len(guest_phys_blocks)))
|
|
|
|
return guest_phys_blocks
|
|
|
|
|
|
# The leading docstring doesn't have idiomatic Python formatting. It is
|
|
# printed by gdb's "help" command (the first line is printed in the
|
|
# "help data" summary), and it should match how other help texts look in
|
|
# gdb.
|
|
class DumpGuestMemory(gdb.Command):
|
|
"""Extract guest vmcore from qemu process coredump.
|
|
|
|
The two required arguments are FILE and ARCH:
|
|
FILE identifies the target file to write the guest vmcore to.
|
|
ARCH specifies the architecture for which the core will be generated.
|
|
|
|
This GDB command reimplements the dump-guest-memory QMP command in
|
|
python, using the representation of guest memory as captured in the qemu
|
|
coredump. The qemu process that has been dumped must have had the
|
|
command line option "-machine dump-guest-core=on" which is the default.
|
|
|
|
For simplicity, the "paging", "begin" and "end" parameters of the QMP
|
|
command are not supported -- no attempt is made to get the guest's
|
|
internal paging structures (ie. paging=false is hard-wired), and guest
|
|
memory is always fully dumped.
|
|
|
|
Currently aarch64-be, aarch64-le, X86_64, 386, s390, ppc64-be,
|
|
ppc64-le guests are supported.
|
|
|
|
The CORE/NT_PRSTATUS and QEMU notes (that is, the VCPUs' statuses) are
|
|
not written to the vmcore. Preparing these would require context that is
|
|
only present in the KVM host kernel module when the guest is alive. A
|
|
fake ELF note is written instead, only to keep the ELF parser of "crash"
|
|
happy.
|
|
|
|
Dependent on how busted the qemu process was at the time of the
|
|
coredump, this command might produce unpredictable results. If qemu
|
|
deliberately called abort(), or it was dumped in response to a signal at
|
|
a halfway fortunate point, then its coredump should be in reasonable
|
|
shape and this command should mostly work."""
|
|
|
|
def __init__(self):
|
|
super(DumpGuestMemory, self).__init__("dump-guest-memory",
|
|
gdb.COMMAND_DATA,
|
|
gdb.COMPLETE_FILENAME)
|
|
self.elf = None
|
|
self.guest_phys_blocks = None
|
|
|
|
def dump_init(self, vmcore):
|
|
"""Prepares and writes ELF structures to core file."""
|
|
|
|
# Needed to make crash happy, data for more useful notes is
|
|
# not available in a qemu core.
|
|
self.elf.add_note("NONE", "EMPTY", 0)
|
|
|
|
# We should never reach PN_XNUM for paging=false dumps,
|
|
# there's just a handful of discontiguous ranges after
|
|
# merging.
|
|
# The constant is needed to account for the PT_NOTE segment.
|
|
phdr_num = len(self.guest_phys_blocks) + 1
|
|
assert phdr_num < PN_XNUM
|
|
|
|
for block in self.guest_phys_blocks:
|
|
block_size = block["target_end"] - block["target_start"]
|
|
self.elf.add_segment(PT_LOAD, block["target_start"], block_size)
|
|
|
|
self.elf.to_file(vmcore)
|
|
|
|
def dump_iterate(self, vmcore):
|
|
"""Writes guest core to file."""
|
|
|
|
qemu_core = gdb.inferiors()[0]
|
|
for block in self.guest_phys_blocks:
|
|
cur = block["host_addr"]
|
|
left = block["target_end"] - block["target_start"]
|
|
print("dumping range at %016x for length %016x" %
|
|
(cur.cast(UINTPTR_T), left))
|
|
|
|
while left > 0:
|
|
chunk_size = min(TARGET_PAGE_SIZE, left)
|
|
chunk = qemu_core.read_memory(cur, chunk_size)
|
|
vmcore.write(chunk)
|
|
cur += chunk_size
|
|
left -= chunk_size
|
|
|
|
def phys_memory_read(self, addr, size):
|
|
qemu_core = gdb.inferiors()[0]
|
|
for block in self.guest_phys_blocks:
|
|
if block["target_start"] <= addr \
|
|
and addr + size <= block["target_end"]:
|
|
haddr = block["host_addr"] + (addr - block["target_start"])
|
|
return qemu_core.read_memory(haddr, size)
|
|
return None
|
|
|
|
def add_vmcoreinfo(self):
|
|
if gdb.lookup_symbol("vmcoreinfo_realize")[0] is None:
|
|
return
|
|
vmci = 'vmcoreinfo_realize::vmcoreinfo_state'
|
|
if not gdb.parse_and_eval("%s" % vmci) \
|
|
or not gdb.parse_and_eval("(%s)->has_vmcoreinfo" % vmci):
|
|
return
|
|
|
|
fmt = gdb.parse_and_eval("(%s)->vmcoreinfo.guest_format" % vmci)
|
|
addr = gdb.parse_and_eval("(%s)->vmcoreinfo.paddr" % vmci)
|
|
size = gdb.parse_and_eval("(%s)->vmcoreinfo.size" % vmci)
|
|
|
|
fmt = le16_to_cpu(fmt)
|
|
addr = le64_to_cpu(addr)
|
|
size = le32_to_cpu(size)
|
|
|
|
if fmt != VMCOREINFO_FORMAT_ELF:
|
|
return
|
|
|
|
vmcoreinfo = self.phys_memory_read(addr, size)
|
|
if vmcoreinfo:
|
|
self.elf.add_vmcoreinfo_note(bytes(vmcoreinfo))
|
|
|
|
def invoke(self, args, from_tty):
|
|
"""Handles command invocation from gdb."""
|
|
|
|
# Unwittingly pressing the Enter key after the command should
|
|
# not dump the same multi-gig coredump to the same file.
|
|
self.dont_repeat()
|
|
|
|
argv = gdb.string_to_argv(args)
|
|
if len(argv) != 2:
|
|
raise gdb.GdbError("usage: dump-guest-memory FILE ARCH")
|
|
|
|
self.elf = ELF(argv[1])
|
|
self.guest_phys_blocks = get_guest_phys_blocks()
|
|
self.add_vmcoreinfo()
|
|
|
|
with open(argv[0], "wb") as vmcore:
|
|
self.dump_init(vmcore)
|
|
self.dump_iterate(vmcore)
|
|
|
|
DumpGuestMemory()
|