diff options
Diffstat (limited to 'example/asm_armt.py')
| -rw-r--r-- | example/asm_armt.py | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/example/asm_armt.py b/example/asm_armt.py new file mode 100644 index 00000000..ccbdad3a --- /dev/null +++ b/example/asm_armt.py @@ -0,0 +1,79 @@ +#! /usr/bin/env python + +from miasm2.core.cpu import parse_ast +from miasm2.arch.arm.arch import mn_armt, base_expr, variable +from miasm2.core import parse_asm +from miasm2.expression.expression import * +from miasm2.core import asmbloc +from elfesteem.strpatchwork import StrPatchwork +from pdb import pm + +my_mn = mn_armt + +reg_and_id = dict(mn_armt.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) + +blocs, symbol_pool = parse_asm.parse_txt(my_mn, "armt", ''' +memcpy: + PUSH {R0-R3, LR} + B test_end +loop: + LDRB R3, [R1] + STRB R3, [R0] + ADDS R0, R0, 1 + ADDS R1, R1, 1 + SUBS R2, R2, 1 +test_end: + CMP R2, 0 + BNE loop + POP {R0-R3, PC} +main: + PUSH {LR} + SUB SP, 0x100 + MOV R0, SP + ADD R1, PC, mystr-$+6 + MOV R0, R0 + EORS R2, R2 + ADDS R2, R2, 0x4 + BL memcpy + ADD SP, 0x100 + POP {PC} + +mystr: +.string "toto" +''') + +# fix shellcode addr +symbol_pool.set_offset(symbol_pool.getby_name("main"), 0x3a4b8) + +for b in blocs[0]: + print b +# graph sc#### +g = asmbloc.bloc2graph(blocs[0]) +open("graph.txt", "w").write(g) + +s = StrPatchwork(open('libandroid_runtime.so').read()) + +print "symbols" +print symbol_pool +# dont erase from start to shell code padading +resolved_b, patches = asmbloc.asm_resolve_final( + my_mn, 'armt', blocs[0], symbol_pool) +print patches + + + +for offset, raw in patches.items(): + s[offset] = raw + +open('demo_armt.bin', 'wb').write(str(s)) |