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#!/usr/bin/env ruby
# Sample code for ARM of Unicorn. Nguyen Anh Quynh <aquynh@gmail.com>
# Ruby sample ported by Sascha Schirra <sashs82@gmail.com>
require 'unicorn_engine'
require 'unicorn_engine/m68k_const'
include UnicornEngine
# code to be emulated
M68K_CODE = "\x76\xed" # movq #-19, %d3
# memory address where emulation starts
ADDRESS = 0x10000
# callback for tracing basic blocks
$hook_block = Proc.new do |uc, address, size, user_data|
puts(">>> Tracing basic block at 0x%x, block size = 0x%x" % [address, size])
end
# callback for tracing instructions
$hook_code = Proc.new do |uc, address, size, user_data|
puts(">>> Tracing instruction at 0x%x, instruction size = %u" % [address, size])
end
# Test m68k
def test_m68k()
puts("Emulate M68K code")
begin
# Initialize emulator in m68k mode
mu = Uc.new UC_ARCH_M68K, UC_MODE_BIG_ENDIAN
# map 2MB memory for this emulation
mu.mem_map(ADDRESS, 2 * 1024 * 1024)
# write machine code to be emulated to memory
mu.mem_write(ADDRESS, M68K_CODE)
# initialize machine registers
mu.reg_write(UC_M68K_REG_D3, 0x1234)
# tracing all basic blocks with customized callback
mu.hook_add(UC_HOOK_BLOCK, $hook_block)
# tracing all instructions with customized callback
mu.hook_add(UC_HOOK_CODE, $hook_code)
# emulate machine code in infinite time
mu.emu_start(ADDRESS, ADDRESS + M68K_CODE.bytesize)
# now print out some registers
puts(">>> Emulation done. Below is the CPU context")
d3 = mu.reg_read(UC_M68K_REG_D3)
puts(">>> D3 = 0x%x" % d3)
rescue UcError => e
puts("ERROR: %s" % e)
end
end
test_m68k()
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