1#!/usr/bin/env ruby
2# Sample code for ARM64 of Unicorn. Nguyen Anh Quynh <aquynh@gmail.com>
3# Ruby sample ported by Sascha Schirra <sashs82@gmail.com>
4require 'unicorn_engine'
5require 'unicorn_engine/arm64_const'
6
7include UnicornEngine
8
9# code to be emulated
10ARM64_CODE = "\xab\x01\x0f\x8b" #add x11, x13, x15
11
12# memory address where emulation starts
13ADDRESS    = 0x10000
14
15
16# callback for tracing basic blocks
17$hook_block = Proc.new do |uc, address, size, user_data|
18    puts(">>> Tracing basic block at 0x%x, block size = 0x%x" % [address, size])
19end
20
21
22# callback for tracing instructions
23$hook_code = Proc.new do |uc, address, size, user_data|
24    puts(">>> Tracing instruction at 0x%x, instruction size = %u" % [address, size])
25end
26
27
28# Test ARM64
29def test_arm64()
30    puts("Emulate ARM64 code")
31    begin
32        # Initialize emulator in ARM mode
33        mu = Uc.new UC_ARCH_ARM64, UC_MODE_ARM
34
35        # map 2MB memory for this emulation
36        mu.mem_map(ADDRESS, 2 * 1024 * 1024)
37
38        # write machine code to be emulated to memory
39        mu.mem_write(ADDRESS, ARM64_CODE)
40
41        # initialize machine registers
42        mu.reg_write(UC_ARM64_REG_X11, 0x1234)
43        mu.reg_write(UC_ARM64_REG_X13, 0x6789)
44        mu.reg_write(UC_ARM64_REG_X15, 0x3333)
45
46        # tracing all basic blocks with customized callback
47        mu.hook_add(UC_HOOK_BLOCK, $hook_block)
48
49        # tracing all instructions with customized callback
50        mu.hook_add(UC_HOOK_CODE, $hook_code)
51
52        # emulate machine code in infinite time
53        mu.emu_start(ADDRESS, ADDRESS + ARM64_CODE.bytesize)
54
55        # now print out some registers
56        puts(">>> Emulation done. Below is the CPU context")
57
58        x11 = mu.reg_read(UC_ARM64_REG_X11)
59        x13 = mu.reg_read(UC_ARM64_REG_X13)
60        x15 = mu.reg_read(UC_ARM64_REG_X15)
61        puts(">>> X11 = 0x%x" % x11)
62
63    rescue UcError => e
64        puts("ERROR: %s" % e)
65    end
66end
67
68
69test_arm64()
70