From 91c9c89650d1c4d3482f1e0d7faaf8e0bdb90a92 Mon Sep 17 00:00:00 2001 From: mothran Date: Tue, 25 Aug 2015 18:48:12 -0700 Subject: [PATCH] added regression test for fstcw not writing to memory --- regress/fpu_mem_write.py | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 regress/fpu_mem_write.py diff --git a/regress/fpu_mem_write.py b/regress/fpu_mem_write.py new file mode 100644 index 00000000..730914a6 --- /dev/null +++ b/regress/fpu_mem_write.py @@ -0,0 +1,32 @@ +#!/usr/bin/python +from unicorn import * +from unicorn.x86_const import * + +ESP = 0x2000 +PAGE_SIZE = 1 * 1024 * 1024 + +# fstcw [esp] +# pop ecx +CODE = b'\x9B\xD9\x3C\x24\x59' + +def mem_reader(addr, size): + tmp = mu.mem_read(addr, size) + + for i in tmp: + print(" 0x%x" % i), + print("") + +def hook_mem_write(uc, access, address, size, value, user_data): + print("mem WRITE: 0x%x, data size = %u, data value = 0x%x" % (address, size, value)) + return True + +mu = Uc(UC_ARCH_X86, UC_MODE_32) +mu.mem_map(0, PAGE_SIZE) +mu.mem_write(0, CODE) +mu.reg_write(UC_X86_REG_ESP, ESP) +mu.hook_add(UC_HOOK_MEM_WRITE, hook_mem_write) + +mu.emu_start(0x0, 0, 0, 2) +esp = mu.reg_read(UC_X86_REG_ESP) +print("value at ESP [0x%X]: " % esp) +mem_reader(esp, 10) \ No newline at end of file