T0b1/fadec
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add REP-prefix table

Browse Source
This commit is contained in:
Alexis Engelke
2019-11-02 19:01:23 +01:00
parent 7682541a00
commit 194a7d6831
3 changed files with 22 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
parseinstrs.py
View File

@@ -139,6 +139,7 @@ class EntryKind(Enum):
TABLE72 = 4
TABLE_PREFIX = 5
TABLE_VEX = 6
TABLE_PREFIX_REP = 7
class TrieEntry(namedtuple("TrieEntry", "kind,items,payload")):
__slots__ = ()
@@ -148,6 +149,7 @@ class TrieEntry(namedtuple("TrieEntry", "kind,items,payload")):
EntryKind.TABLE72: 72,
EntryKind.TABLE_PREFIX: 8,
EntryKind.TABLE_VEX: 4,
EntryKind.TABLE_PREFIX_REP: 4,
}
@classmethod
def table(cls, kind):
@@ -170,7 +172,7 @@ class TrieEntry(namedtuple("TrieEntry", "kind,items,payload")):
return TrieEntry(self.kind, tuple(mapped_items), self.payload)
import re
opcode_regex = re.compile(r"^(?P<prefixes>(?P<vex>VEX\.)?(?P<legacy>NP|66|F2|F3)\.(?P<rexw>W[01]\.)?(?P<vexl>L[01]\.)?)?(?P<opcode>(?:[0-9a-f]{2})+)(?P<modrm>//?[0-7]|//[c-f][0-9a-f])?(?P<extended>\+)?$")
opcode_regex = re.compile(r"^(?:(?P<prefixes>(?P<vex>VEX\.)?(?P<legacy>NP|66|F2|F3)\.(?P<rexw>W[01]\.)?(?P<vexl>L[01]\.)?)|R(?P<repprefix>NP|F2|F3).)?(?P<opcode>(?:[0-9a-f]{2})+)(?P<modrm>//?[0-7]|//[c-f][0-9a-f])?(?P<extended>\+)?$")
def parse_opcode(opcode_string):
"""
@@ -213,6 +215,9 @@ def parse_opcode(opcode_string):
entries = list(map(sum, product(rexw, vexl)))
opcode.append((EntryKind.TABLE_VEX, entries))
elif match.group("repprefix"):
rep = {"NP": 0, "F3": 2, "F2": 3}[match.group("repprefix")]
opcode.append((EntryKind.TABLE_PREFIX_REP, [rep]))
kinds, values = zip(*opcode)
return [tuple(zip(kinds, prod)) for prod in product(*values)]