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x86: add sample for 16bit mode

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This commit is contained in:
Nguyen Anh Quynh
2015-08-26 09:25:29 +08:00
parent 8154c11480
commit 22b549a4db
3 changed files with 94 additions and 2 deletions
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33
bindings/python/sample_x86.py
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@ -13,6 +13,7 @@ X86_CODE32_MEM_WRITE = b"\x89\x0D\xAA\xAA\xAA\xAA\x41\x4a" # mov [0xaaaaaaaa], e
X86_CODE64 = b"\x41\xBC\x3B\xB0\x28\x2A\x49\x0F\xC9\x90\x4D\x0F\xAD\xCF\x49\x87\xFD\x90\x48\x81\xD2\x8A\xCE\x77\x35\x48\xF7\xD9\x4D\x29\xF4\x49\x81\xC9\xF6\x8A\xC6\x53\x4D\x87\xED\x48\x0F\xAD\xD2\x49\xF7\xD4\x48\xF7\xE1\x4D\x19\xC5\x4D\x89\xC5\x48\xF7\xD6\x41\xB8\x4F\x8D\x6B\x59\x4D\x87\xD0\x68\x6A\x1E\x09\x3C\x59"
X86_CODE32_INOUT = b"\x41\xE4\x3F\x4a\xE6\x46\x43" # INC ecx; IN AL, 0x3f; DEC edx; OUT 0x46, AL; INC ebx
X86_CODE64_SYSCALL = '\x0f\x05' # SYSCALL
X86_CODE16 = '\x00\x00' # add byte ptr [bx + si], al
# memory address where emulation starts
ADDRESS = 0x1000000
@ -437,6 +438,36 @@ def test_x86_64_syscall():
print("ERROR: %s" % e)
def test_x86_16():
print("Emulate x86 16-bit code")
try:
# Initialize emulator in X86-16bit mode
mu = Uc(UC_ARCH_X86, UC_MODE_16)
# map 8KB memory for this emulation
mu.mem_map(0, 8 * 1024)
# set CPU registers
mu.reg_write(UC_X86_REG_EAX, 7)
mu.reg_write(UC_X86_REG_EBX, 5)
mu.reg_write(UC_X86_REG_ESI, 6)
# write machine code to be emulated to memory
mu.mem_write(0, X86_CODE16)
# emulate machine code in infinite time
mu.emu_start(0, len(X86_CODE16))
# now print out some registers
print(">>> Emulation done. Below is the CPU context")
tmp = mu.mem_read(11, 1)
print("[0x%x] = 0x%x" %(11, tmp[0]))
except UcError as e:
print("ERROR: %s" % e)
if __name__ == '__main__':
test_i386()
print("=" * 20)
@ -451,3 +482,5 @@ if __name__ == '__main__':
test_x86_64()
print("=" * 20)
test_x86_64_syscall()
print("=" * 20)
test_x86_16()