mirror of
https://github.com/cea-sec/miasm
synced 2026-06-21 13:48:18 +00:00
Fabrice Desclaux
70 lines
1.7 KiB
Python
70 lines
1.7 KiB
Python
#! /usr/bin/env python
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from miasm2.core.cpu import parse_ast
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from miasm2.arch.mips32.arch import mn_mips32, base_expr, variable
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from miasm2.core.bin_stream import bin_stream
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from miasm2.core import parse_asm
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from miasm2.expression.expression import *
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from elfesteem.strpatchwork import StrPatchwork
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from pdb import pm
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from miasm2.core import asmbloc
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import struct
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reg_and_id = dict(mn_mips32.regs.all_regs_ids_byname)
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def my_ast_int2expr(a):
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return ExprInt32(a)
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def my_ast_id2expr(t):
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return reg_and_id.get(t, ExprId(t, size=32))
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my_var_parser = parse_ast(my_ast_id2expr, my_ast_int2expr)
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base_expr.setParseAction(my_var_parser)
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st_l = StrPatchwork()
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st_b = StrPatchwork()
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txt = '''
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main:
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ADDIU A0, ZERO, 0x10
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ADDIU A1, ZERO, 0
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loop:
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ADDIU A1, A1, 0x1
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BNE A0, ZERO, loop
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ADDIU A0, A0, 0xFFFFFFFF
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ADDIU A2, A2, 0x1
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MOVN A1, ZERO, ZERO
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JR RA
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ADDIU A2, A2, 0x1
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'''
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blocs_b, symbol_pool_b = parse_asm.parse_txt(mn_mips32, "b", txt)
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blocs_l, symbol_pool_l = parse_asm.parse_txt(mn_mips32, "l", txt)
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# fix shellcode addr
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symbol_pool_b.set_offset(symbol_pool_b.getby_name("main"), 0)
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symbol_pool_l.set_offset(symbol_pool_l.getby_name("main"), 0)
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for b in blocs_b[0]:
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print b
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resolved_b, patches_b = asmbloc.asm_resolve_final(
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mn_mips32, blocs_b[0], symbol_pool_b)
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resolved_l, patches_l = asmbloc.asm_resolve_final(
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mn_mips32, blocs_l[0], symbol_pool_l)
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print patches_b
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print patches_l
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for offset, raw in patches_b.items():
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st_b[offset] = raw
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for offset, raw in patches_l.items():
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st_l[offset] = raw
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open('mips32_sc_b.bin', 'wb').write(str(st_l))
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open('mips32_sc_l.bin', 'wb').write(str(st_l))
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