1 files changed, 103 insertions, 0 deletions
diff --git a/example/asm_box_x86_32_repmod.py b/example/asm_box_x86_32_repmod.py
new file mode 100644
index 00000000..f351fcfa
--- /dev/null
+++ b/example/asm_box_x86_32_repmod.py
@@ -0,0 +1,103 @@
+#! /usr/bin/env python
+
+# test instruction caching
+
+from miasm2.core.cpu import parse_ast
+from miasm2.arch.x86.arch import mn_x86, base_expr, variable
+from miasm2.core.bin_stream import bin_stream
+from miasm2.core import parse_asm
+from miasm2.expression.expression import *
+from elfesteem import *
+from pdb import pm
+from miasm2.core import asmbloc
+import struct
+
+e = pe_init.PE()
+s_text = e.SHList.add_section(name="text", addr=0x1000, rawsize=0x1000)
+s_iat = e.SHList.add_section(name="iat", rawsize=0x100)
+new_dll = [({"name": "USER32.dll",
+             "firstthunk": s_iat.addr}, ["MessageBoxA"])]
+e.DirImport.add_dlldesc(new_dll)
+s_myimp = e.SHList.add_section(name="myimp", rawsize=len(e.DirImport))
+e.DirImport.set_rva(s_myimp.addr)
+
+reg_and_id = dict(mn_x86.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(mn_x86, 32, '''
+main:
+    CALL test_automod
+    RET
+
+lbl_good:
+    NOP
+    NOP
+    NOP
+    NOP
+    NOP
+    NOP
+    NOP
+    NOP
+    NOP
+
+test_automod:
+    PUSH EBP
+    MOV  EBP, ESP
+
+    LEA EDI, DWORD PTR [lbl_mod]
+    LEA ESI, DWORD PTR [lbl_good]
+
+    MOV ECX, 0x8
+    REPE MOVSB
+lbl_mod:
+    XOR EAX, EAX
+    MOV DWORD PTR [EAX], 0xDEADC0DE
+
+    NOP
+    NOP
+    NOP
+
+    PUSH 0
+    PUSH title
+    PUSH msg
+    PUSH 0
+    CALL DWORD PTR [ MessageBoxA ]
+
+    MOV ESP, EBP
+    POP EBP
+    RET
+
+title:
+.string "Hello!"
+msg:
+.string "World!"
+''')
+
+# fix shellcode addr
+symbol_pool.set_offset(symbol_pool.getby_name("main"), e.rva2virt(s_text.addr))
+symbol_pool.set_offset(symbol_pool.getby_name_create("MessageBoxA"),
+                       e.DirImport.get_funcvirt('MessageBoxA'))
+e.Opthdr.AddressOfEntryPoint = s_text.addr
+
+for b in blocs[0]:
+    print b
+
+resolved_b, patches = asmbloc.asm_resolve_final(
+    mn_x86, 32, blocs[0], symbol_pool)
+print patches
+
+for offset, raw in patches.items():
+    e.virt[offset] = raw
+
+open('box_x86_32_repmod.bin', 'wb').write(str(e))