1"""
2Use lldb Python API to disassemble raw machine code bytes
3"""
4
5from __future__ import print_function
6
7from io import StringIO
8import sys
9
10import lldb
11from lldbsuite.test.decorators import *
12from lldbsuite.test.lldbtest import *
13from lldbsuite.test import lldbutil
14
15
16class Disassemble_VST1_64(TestBase):
17
18    mydir = TestBase.compute_mydir(__file__)
19
20    @no_debug_info_test
21    @skipIfLLVMTargetMissing("ARM")
22    def test_disassemble_invalid_vst_1_64_raw_data(self):
23        """Test disassembling invalid vst1.64 raw bytes with the API."""
24        # Create a target from the debugger.
25        target = self.dbg.CreateTargetWithFileAndTargetTriple("", "thumbv7-apple-macosx")
26        self.assertTrue(target, VALID_TARGET)
27
28        raw_bytes = bytearray([0xf0, 0xb5, 0x03, 0xaf,
29                               0x2d, 0xe9, 0x00, 0x0d,
30                               0xad, 0xf1, 0x40, 0x04,
31                               0x24, 0xf0, 0x0f, 0x04,
32                               0xa5, 0x46])
33
34        assembly = """
35        push   {r4, r5, r6, r7, lr}
36        add    r7, sp, #0xc
37        push.w {r8, r10, r11}
38        sub.w  r4, sp, #0x40
39        bic    r4, r4, #0xf
40        mov    sp, r4
41        """
42        def split(s):
43            return [x.strip() for x in s.strip().splitlines()]
44
45        insts = target.GetInstructions(lldb.SBAddress(), raw_bytes)
46
47        if self.TraceOn():
48            print()
49            for i in insts:
50                print("Disassembled %s" % str(i))
51
52        if sys.version_info.major >= 3:
53            sio = StringIO()
54            insts.Print(sio)
55            self.assertEqual(split(assembly), split(sio.getvalue()))
56
57        self.assertEqual(insts.GetSize(), len(split(assembly)))
58
59        if sys.version_info.major >= 3:
60            for i,asm in enumerate(split(assembly)):
61                inst = insts.GetInstructionAtIndex(i)
62                sio = StringIO()
63                inst.Print(sio)
64                self.assertEqual(asm, sio.getvalue().strip())
65
66        raw_bytes = bytearray([0x04, 0xf9, 0xed, 0x82])
67
68        insts = target.GetInstructions(lldb.SBAddress(), raw_bytes)
69
70        inst = insts.GetInstructionAtIndex(0)
71
72        if self.TraceOn():
73            print()
74            print("Raw bytes:    ", [hex(x) for x in raw_bytes])
75            print("Disassembled%s" % str(inst))
76
77        self.assertEqual(inst.GetMnemonic(target), "vst1.64")
78