Example: Move asm's examples to a `asm` directory

1 files changed, 88 insertions, 0 deletions

diff --git a/example/asm/x86.py b/example/asm/x86.py
new file mode 100644
index 00000000..d877ceaa
--- /dev/null
+++ b/example/asm/x86.py
@@ -0,0 +1,88 @@
+#! /usr/bin/env python
+
+from miasm2.core.cpu import parse_ast
+from miasm2.arch.x86.arch import mn_x86, base_expr
+from miasm2.core import parse_asm
+import miasm2.expression.expression as m2_expr
+from miasm2.core import asmbloc
+from elfesteem.strpatchwork import StrPatchwork
+
+reg_and_id = dict(mn_x86.regs.all_regs_ids_byname)
+
+
+def my_ast_int2expr(a):
+    return m2_expr.ExprInt32(a)
+
+
+def my_ast_id2expr(t):
+    return reg_and_id.get(t, m2_expr.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:
+   PUSH EBP
+   MOV  EBP, ESP
+   SUB  ESP, 0x100
+   MOV  EAX, 0x1337
+   ; test ptr manip
+   LEA  ESI, DWORD PTR [mystr^toto]
+   CALL toto
+mystr:
+.string "test string"
+ toto:
+   POP  EDI
+
+   PUSH EDI
+   ; test scasb
+   XOR  EAX, EAX
+   XOR  ECX, ECX
+   DEC  ECX
+   REPNE SCASB
+   NOT  ECX
+   DEC  ECX
+
+   ; test movsb
+   POP  ESI
+   LEA  EDI, DWORD PTR [EBP-0x100]
+   REPE  MOVSB
+
+   ; test float
+   PUSH 0
+   FLD1
+   FLD1
+   FADD ST, ST(1)
+   FIST  DWORD PTR [ESP]
+   POP  EAX
+
+   ; test cond mnemo
+   NOP
+   NOP
+   CMOVZ EAX, EBX
+   ; test shr
+   NOP
+   SHR EAX, 1
+   NOP
+   NOP
+   SHR EAX, CL
+   NOP
+
+   MOV  ESP, EBP
+   POP  EBP
+   RET
+
+
+''')
+
+# fix shellcode addr
+symbol_pool.set_offset(symbol_pool.getby_name("main"), 0x0)
+s = StrPatchwork()
+resolved_b, patches = asmbloc.asm_resolve_final(
+    mn_x86, blocs[0], symbol_pool)
+for offset, raw in patches.items():
+    s[offset] = raw
+
+print patches
+
+open('demo_x86_32.bin', 'wb').write(str(s))