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#!/usr/bin/env ruby
# Sample code for ARM64 of Unicorn. Nguyen Anh Quynh <aquynh@gmail.com>
# Ruby sample ported by Sascha Schirra <sashs82@gmail.com>
require 'unicorn_engine'
require 'unicorn_engine/arm64_const'
include UnicornEngine
# code to be emulated
ARM64_CODE = "\xab\x01\x0f\x8b" #add x11, x13, x15
# 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 ARM64
def test_arm64()
puts("Emulate ARM64 code")
begin
# Initialize emulator in ARM mode
mu = Uc.new UC_ARCH_ARM64, UC_MODE_ARM
# 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, ARM64_CODE)
# initialize machine registers
mu.reg_write(UC_ARM64_REG_X11, 0x1234)
mu.reg_write(UC_ARM64_REG_X13, 0x6789)
mu.reg_write(UC_ARM64_REG_X15, 0x3333)
# 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 + ARM64_CODE.bytesize)
# now print out some registers
puts(">>> Emulation done. Below is the CPU context")
x11 = mu.reg_read(UC_ARM64_REG_X11)
x13 = mu.reg_read(UC_ARM64_REG_X13)
x15 = mu.reg_read(UC_ARM64_REG_X15)
puts(">>> X11 = 0x%x" % x11)
rescue UcError => e
puts("ERROR: %s" % e)
end
end
test_arm64()
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