105 lines
2.9 KiB
Ruby
105 lines
2.9 KiB
Ruby
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#!/usr/bin/env ruby
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# Sample code for MIPS of Unicorn. Nguyen Anh Quynh <aquynh@gmail.com>
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# Ruby sample ported by Sascha Schirra <sashs82@gmail.com>
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require 'unicorn'
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require 'unicorn/mips_const'
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include Unicorn
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# code to be emulated
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MIPS_CODE_EB = "\x34\x21\x34\x56" # ori $at, $at, 0x3456;
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MIPS_CODE_EL = "\x56\x34\x21\x34" # ori $at, $at, 0x3456;
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# memory address where emulation starts
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ADDRESS = 0x10000
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# callback for tracing basic blocks
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$hook_block = Proc.new do |uc, address, size, user_data|
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puts(">>> Tracing basic block at 0x%x, block size = 0x%x" % [address, size])
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end
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# callback for tracing instructions
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$hook_code = Proc.new do |uc, address, size, user_data|
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puts(">>> Tracing instruction at 0x%x, instruction size = %u" % [address, size])
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end
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# Test MIPS EB
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def test_mips_eb()
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puts("Emulate MIPS code (big-endian)")
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begin
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# Initialize emulator in MIPS32 + EB mode
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mu = Uc.new UC_ARCH_MIPS, UC_MODE_MIPS32 + UC_MODE_BIG_ENDIAN
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# map 2MB memory for this emulation
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mu.mem_map(ADDRESS, 2 * 1024 * 1024)
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# write machine code to be emulated to memory
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mu.mem_write(ADDRESS, MIPS_CODE_EB)
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# initialize machine registers
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mu.reg_write(UC_MIPS_REG_1, 0x6789)
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# tracing all basic blocks with customized callback
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mu.hook_add(UC_HOOK_BLOCK, $hook_block)
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# tracing all instructions with customized callback
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mu.hook_add(UC_HOOK_CODE, $hook_code)
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# emulate machine code in infinite time
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mu.emu_start(ADDRESS, ADDRESS + MIPS_CODE_EB.bytesize)
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# now puts out some registers
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puts(">>> Emulation done. Below is the CPU context")
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r1 = mu.reg_read(UC_MIPS_REG_1)
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puts(">>> r1 = 0x%x" % r1)
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rescue UcError => e
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puts("ERROR: %s" % e)
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end
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end
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# Test MIPS EL
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def test_mips_el()
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puts("Emulate MIPS code (little-endian)")
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begin
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# Initialize emulator in MIPS32 + EL mode
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mu = Uc.new UC_ARCH_MIPS, UC_MODE_MIPS32 + UC_MODE_LITTLE_ENDIAN
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# map 2MB memory for this emulation
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mu.mem_map(ADDRESS, 2 * 1024 * 1024)
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# write machine code to be emulated to memory
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mu.mem_write(ADDRESS, MIPS_CODE_EL)
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# initialize machine registers
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mu.reg_write(UC_MIPS_REG_1, 0x6789)
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# tracing all basic blocks with customized callback
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mu.hook_add(UC_HOOK_BLOCK, $hook_block)
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# tracing all instructions with customized callback
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mu.hook_add(UC_HOOK_CODE, $hook_code)
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# emulate machine code in infinite time
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mu.emu_start(ADDRESS, ADDRESS + MIPS_CODE_EL.bytesize)
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# now puts out some registers
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puts(">>> Emulation done. Below is the CPU context")
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r1 = mu.reg_read(UC_MIPS_REG_1)
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puts(">>> r1 = 0x%x" % r1)
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rescue UcError => e
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puts("ERROR: %s" % e)
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end
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end
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test_mips_eb()
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puts("=" * 20)
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test_mips_el()
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