diff --git a/bindings/ruby/sample_arm.rb b/bindings/ruby/sample_arm.rb new file mode 100644 index 00000000..dd0e4a06 --- /dev/null +++ b/bindings/ruby/sample_arm.rb @@ -0,0 +1,106 @@ +#!/usr/bin/env ruby + +require 'unicorn' +require 'unicorn/arm_const' + +include Unicorn + +# code to be emulated +ARM_CODE = "\x37\x00\xa0\xe3\x03\x10\x42\xe0" # mov r0, #0x37; sub r1, r2, r3 +THUMB_CODE = "\x83\xb0" # sub sp, #0xc +# 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 ARM +def test_arm() + puts("Emulate ARM code") + begin + # Initialize emulator in ARM mode + mu = Uc.new UC_ARCH_ARM, 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, ARM_CODE) + + # initialize machine registers + mu.reg_write(UC_ARM_REG_R0, 0x1234) + mu.reg_write(UC_ARM_REG_R2, 0x6789) + mu.reg_write(UC_ARM_REG_R3, 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 + ARM_CODE.bytesize) + + # now print out some registers + puts(">>> Emulation done. Below is the CPU context") + + r0 = mu.reg_read(UC_ARM_REG_R0) + r1 = mu.reg_read(UC_ARM_REG_R1) + puts(">>> R0 = 0x%x" % r0) + puts(">>> R1 = 0x%x" % r1) + + rescue UcError => e + puts("ERROR: %s" % e) + end +end + + +def test_thumb() + puts("Emulate THUMB code") + begin + # Initialize emulator in thumb mode + mu = Uc.new UC_ARCH_ARM, UC_MODE_THUMB + + # 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, THUMB_CODE) + + # initialize machine registers + mu.reg_write(UC_ARM_REG_SP, 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 + THUMB_CODE.bytesize) + + # now print out some registers + puts(">>> Emulation done. Below is the CPU context") + + sp = mu.reg_read(UC_ARM_REG_SP) + puts(">>> SP = 0x%x" % sp) + + rescue UcError => e + puts("ERROR: %s" % e) + end +end + + +test_arm() +puts("=" * 20) +test_thumb()