def do_remove_empty_assignblks(self, ssa, head):
"""
Remove empty assignblks
@head: Location instance of the graph head
"""
modified = remove_empty_assignblks(ssa.graph)
return modified
def do_dead_simp_ircfg(self, ircfg, head):
"""
Apply:
- dead_simp
- remove_empty_assignblks
- merge_blocks
on the @ircfg until reaching fix point
Return True if the graph has been modified
@ircfg: IRCFG instance to simplify
@head: Location instance of the ircfg head
"""
modified = dead_simp(self.ir_arch, ircfg)
modified |= remove_empty_assignblks(ircfg)
modified |= merge_blocks(ircfg, set([head]))
return modified
def do_dead_simp_ircfg(self, ircfg, head):
"""
Apply:
- dead_simp
- remove_empty_assignblks
- merge_blocks
on the @ircfg until reaching fix point
Return True if the graph has been modified
@ircfg: IRCFG instance to simplify
@head: Location instance of the ircfg head
"""
modified = dead_simp(self.ir_arch, ircfg)
modified |= remove_empty_assignblks(ircfg)
modified |= merge_blocks(ircfg, set([head]))
return modified
help="Apply simplifications rules (liveness, graph simplification, ...)")
args = parser.parse_args()
machine = Machine("x86_32")
loc_db = LocationDB()
cont = Container.from_stream(open(args.filename, 'rb'), loc_db)
mdis = machine.dis_engine(cont.bin_stream, loc_db=loc_db)
ir_arch = machine.ira(mdis.loc_db)
addr = int(args.address, 0)
deadrm = DeadRemoval(ir_arch)
asmcfg = mdis.dis_multiblock(addr)
ircfg = ir_arch.new_ircfg_from_asmcfg(asmcfg)
entry_points = set([mdis.loc_db.get_offset_location(addr)])
init_infos = ir_arch.arch.regs.regs_init
cst_propag_link = propagate_cst_expr(ir_arch, ircfg, addr, init_infos)
if args.simplify:
ircfg.simplify(expr_simp)
modified = True
while modified:
modified = False
modified |= deadrm(ircfg)
modified |= remove_empty_assignblks(ircfg)
modified |= merge_blocks(ircfg, entry_points)
open("%s.propag.dot" % args.filename, 'w').write(ircfg.dot())
help="Apply simplifications rules (liveness, graph simplification, ...)")
args = parser.parse_args()
machine = Machine("x86_32")
cont = Container.from_stream(open(args.filename, 'rb'))
mdis = machine.dis_engine(cont.bin_stream, loc_db=cont.loc_db)
ir_arch = machine.ira(mdis.loc_db)
addr = int(args.address, 0)
asmcfg = mdis.dis_multiblock(addr)
ircfg = ir_arch.new_ircfg_from_asmcfg(asmcfg)
entry_points = set([mdis.loc_db.get_offset_location(addr)])
init_infos = ir_arch.arch.regs.regs_init
cst_propag_link = propagate_cst_expr(ir_arch, ircfg, addr, init_infos)
if args.simplify:
ircfg.simplify(expr_simp)
modified = True
while modified:
modified = False
modified |= dead_simp(ir_arch, ircfg)
modified |= remove_empty_assignblks(ircfg)
modified |= merge_blocks(ircfg, entry_points)
open("%s.propag.dot" % args.filename, 'w').write(ircfg.dot())
