#!/usr/bin/env ruby
# Sample code for SPARC of Unicorn. Nguyen Anh Quynh <aquynh@gmail.com>
# Ruby sample ported by Sascha Schirra <sashs82@gmail.com>
require 'unicorn_engine'
require 'unicorn_engine/sparc_const'

include UnicornEngine

# code to be emulated
SPARC_CODE = "\x86\x00\x40\x02" # add %g1, %g2, %g3;
# 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 SPARC
def test_sparc()
    puts("Emulate SPARC code")
    begin
        # Initialize emulator in SPARC EB mode
        mu = Uc.new UC_ARCH_SPARC, UC_MODE_SPARC32|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, SPARC_CODE)

        # initialize machine registers
        mu.reg_write(UC_SPARC_REG_G1, 0x1230)
        mu.reg_write(UC_SPARC_REG_G2, 0x6789)
        mu.reg_write(UC_SPARC_REG_G3, 0x5555)

        # 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 + SPARC_CODE.bytesize)

        # now puts out some registers
        puts(">>> Emulation done. Below is the CPU context")

        g3 = mu.reg_read(UC_SPARC_REG_G3)
        puts(">>> G3 = 0x%x" %g3)

    rescue UcError => e
        puts("ERROR: %s" % e)
    end
end


test_sparc()