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Ssa transform #713

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Merged
merged 2 commits into from
Jul 9, 2018
Merged

Ssa transform #713

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bb40c1a
Analysis: Add SSA transformation
mrphrazer Apr 11, 2018
953676d
SSA: add tests
serpilliere Apr 11, 2018
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13 changes: 13 additions & 0 deletions example/disasm/full.py
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,7 @@
from miasm2.analysis.machine import Machine
from miasm2.analysis.data_flow import dead_simp, DiGraphDefUse, ReachingDefinitions
from miasm2.expression.simplifications import expr_simp
from miasm2.analysis.ssa import SSAPath, SSADiGraph

log = logging.getLogger("dis")
console_handler = logging.StreamHandler()
Expand Down Expand Up @@ -52,6 +53,8 @@
parser.add_argument('-d', "--defuse", action="store_true",
help="Dump the def-use graph in file 'defuse.dot'."
"The defuse is dumped after simplifications if -s option is specified")
parser.add_argument('-p', "--ssa", action="store_true",
help="Generate the ssa form in 'ssa.dot'.")

args = parser.parse_args()

Expand Down Expand Up @@ -236,3 +239,13 @@
modified |= ircfg_a.merge_blocks()

open('graph_irflow_reduced.dot', 'w').write(ircfg_a.dot())

if args.ssa:
heads = ircfg_a.heads()
if len(heads) != 1:
raise RuntimeError("Your graph should have only one head")
head = list(heads)[0]
ssa = SSADiGraph(ircfg_a)
ssa.transform(head)

open("ssa.dot", "wb").write(ssa.graph.dot())
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