def _poke(command, pid, address, word):
if address % CPU_WORD_SIZE:
raise PtraceError(
"ptrace can't write a word to an unaligned address (%s)!" %
formatAddress(address),
pid=pid)
ptrace(command, pid, address, word)
def _peek(command, pid, address):
if address % CPU_WORD_SIZE:
raise PtraceError(
"ptrace can't read a word from an unaligned address (%s)!" %
formatAddress(address),
pid=pid)
return ptrace(command, pid, address, check_errno=True)
def ptrace(command, pid=0, arg1=0, arg2=0, check_errno=False):
if HAS_CPTRACE:
try:
result = _ptrace(command, pid, arg1, arg2)
except ValueError, errobj:
message = str(errobj)
errno = get_errno()
raise PtraceError(message, errno=errno, pid=pid)
def ptrace(command, pid=0, arg1=0, arg2=0, check_errno=False):
if HAS_CPTRACE:
try:
result = _ptrace(command, pid, arg1, arg2)
except ValueError as errobj:
message = str(errobj)
errno = get_errno()
raise PtraceError(message, errno=errno, pid=pid)
else:
result = _ptrace(command, pid, arg1, arg2)
result_signed = c_long(result).value
if result_signed == -1:
errno = get_errno()
# peek operations may returns -1 with errno=0:
# it's not an error. For other operations, -1
# is always an error
if not (check_errno) or errno:
message = "ptrace(cmd=%s, pid=%s, %r, %r) error #%s: %s" % (
command, pid, arg1, arg2, errno, strerror(errno))
raise PtraceError(message, errno=errno, pid=pid)
return result
message = str(errobj)
errno = get_errno()
raise PtraceError(message, errno=errno, pid=pid)
else:
result = _ptrace(command, pid, arg1, arg2)
result_signed = c_long(result).value
if result_signed == -1:
errno = get_errno()
# peek operations may returns -1 with errno=0:
# it's not an error. For other operations, -1
# is always an error
if not(check_errno) or errno:
message = "ptrace(cmd=%s, pid=%s, %r, %r) error #%s: %s" % (
command, pid, arg1, arg2,
errno, strerror(errno))
raise PtraceError(message, errno=errno, pid=pid)
return result
def ptrace_traceme():
ptrace(PTRACE_TRACEME)
def ptrace_attach(pid):
ptrace(PTRACE_ATTACH, pid)
def ptrace_detach(pid, signal=0):
ptrace(PTRACE_DETACH, pid, 0, signal);
def _peek(command, pid, address):
if address % CPU_WORD_SIZE:
raise PtraceError(
"ptrace can't read a word from an unaligned address (%s)!"