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from miasm2.jitter.jitload import Jitter, named_arguments
from miasm2.core.locationdb import LocationDB
from miasm2.arch.ppc.sem import ir_ppc32b
import struct
import logging
log = logging.getLogger('jit_ppc')
hnd = logging.StreamHandler()
hnd.setFormatter(logging.Formatter("[%(levelname)s]: %(message)s"))
log.addHandler(hnd)
log.setLevel(logging.CRITICAL)
class jitter_ppc32b(Jitter):
max_reg_arg = 8
def __init__(self, *args, **kwargs):
super(jitter_ppc32b, self).__init__(ir_ppc32b(LocationDB()),
*args, **kwargs)
self.vm.set_big_endian()
def push_uint32_t(self, v):
self.cpu.R1 -= 4
self.vm.set_mem(self.cpu.R1, struct.pack(">I", v))
def pop_uint32_t(self):
x = struct.unpack(">I", self.vm.get_mem(self.cpu.R1, 4))[0]
self.cpu.R1 += 4
return x
def get_stack_arg(self, n):
x = struct.unpack(">I", self.vm.get_mem(self.cpu.R1 + 8 + 4 * n, 4))[0]
return x
@named_arguments
def func_args_systemv(self, n_args):
args = [self.get_arg_n_systemv(i) for i in xrange(n_args)]
ret_ad = self.cpu.LR
return ret_ad, args
def func_ret_systemv(self, ret_addr, ret_value1=None, ret_value2=None):
self.pc = self.cpu.PC = ret_addr
if ret_value1 is not None:
self.cpu.R3 = ret_value1
if ret_value2 is not None:
self.cpu.R4 = ret_value2
return True
def func_prepare_systemv(self, ret_addr, *args):
for index in xrange(min(len(args), self.max_reg_arg)):
setattr(self.cpu, 'R%d' % (index + 3), args[index])
for index in xrange(len(args) - 1, self.max_reg_arg - 1, -1):
self.push_uint32_t(args[index])
# reserve room for LR save word and backchain
self.cpu.R1 -= 8
self.cpu.LR = ret_addr
def get_arg_n_systemv(self, index):
if index < self.max_reg_arg:
arg = getattr(self.cpu, 'R%d' % (index + 3))
else:
arg = self.get_stack_arg(index - self.max_reg_arg)
return arg
def init_run(self, *args, **kwargs):
Jitter.init_run(self, *args, **kwargs)
self.cpu.PC = self.pc
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