Source Code for Module vdb.extensions.arm

 1   
 2  import envi.cli as e_cli 
 3  import envi.archs.arm.thumb as e_thumb 
 4   
 5 -def thumb(db, line): 
 6      ''' 
 7      Disassemble thumb instructions from the given address. 
 8   
 9      Usage: thumb <addr_exp> 
10      ''' 
11      t = db.getTrace() 
12   
13      d = e_thumb.ArmThumbDisasm() 
14   
15      argv = e_cli.splitargs(line) 
16      size = 20 
17      argc = len(argv) 
18      if argc == 0: 
19          addr = t.getProgramCounter() 
20      else: 
21          addr = t.parseExpression(argv[0]) 
22   
23      if argc > 1: 
24          size = t.parseExpression(argv[1]) 
25   
26      bytes = t.readMemory(addr, size) 
27      offset = 0 
28   
29      db.vprint("Dissassembly:") 
30      while offset < size: 
31          va = addr + offset 
32          op = d.disasm(bytes, offset, va) 
33          obytes = bytes[offset:offset+len(op)] 
34   
35   
36          db.canvas.addVaText('0x%.8x' % va, va=va) 
37          db.canvas.addText(": %s " % obytes.encode('hex').ljust(17)) 
38          op.render(db.canvas) 
39          db.canvas.addText("\n") 
40   
41          offset += len(op) 
42   
43 -def vdbExtension(db, trace): 
44      db.config.set('Aliases','db','mem -F bytes') 
45      db.config.set('Aliases','dw','mem -F u_int_16') 
46      db.config.set('Aliases','dd','mem -F u_int_32') 
47      db.config.set('Aliases','dq','mem -F u_int_64') 
48      db.config.set('Aliases','dr','mem -F "Deref View"') 
49      db.config.set('Aliases','ds','mem -F "Symbols View"') 
50      db.registerCmdExtension(thumb) 
51