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#! /usr/bin/env python
from miasm2.core.cpu import parse_ast
from miasm2.arch.mips32.arch import mn_mips32, base_expr, variable
from miasm2.core.bin_stream import bin_stream
from miasm2.core import parse_asm
from miasm2.expression.expression import *
from elfesteem.strpatchwork import StrPatchwork
from pdb import pm
from miasm2.core import asmbloc
import struct
reg_and_id = dict(mn_mips32.regs.all_regs_ids_byname)
def my_ast_int2expr(a):
return ExprInt32(a)
def my_ast_id2expr(t):
return reg_and_id.get(t, ExprId(t, size=32))
my_var_parser = parse_ast(my_ast_id2expr, my_ast_int2expr)
base_expr.setParseAction(my_var_parser)
st = StrPatchwork()
blocs, symbol_pool = parse_asm.parse_txt(mn_mips32, "l", '''
main:
ADDIU A0, ZERO, 0x10
ADDIU A1, ZERO, 0
loop:
ADDIU A1, A1, 0x1
BNE A0, ZERO, loop
ADDIU A0, A0, 0xFFFFFFFF
ADDIU A2, A2, 0x1
MOVN A1, ZERO, ZERO
JR RA
ADDIU A2, A2, 0x1
''')
# fix shellcode addr
symbol_pool.set_offset(symbol_pool.getby_name("main"), 0)
for b in blocs[0]:
print b
resolved_b, patches = asmbloc.asm_resolve_final(
mn_mips32, 'l', blocs[0], symbol_pool)
print patches
for offset, raw in patches.items():
st[offset] = raw
open('mips32_sc.bin', 'wb').write(str(st))
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