armeb: Add support for ARM big endian.

bindings/python/sample_armeb.py

@@ -0,0 +1,105 @@
+#!/usr/bin/env python
+# Sample code for ARM of Unicorn. Nguyen Anh Quynh <aquynh@gmail.com>
+# Python sample ported by Loi Anh Tuan <loianhtuan@gmail.com>
+
+from __future__ import print_function
+from unicorn import *
+from unicorn.arm_const import *
+
+
+# code to be emulated
+ARM_CODE   = b"\xe3\xa0\x00\x37\xe0\x42\x10\x03" # mov r0, #0x37; sub r1, r2, r3
+THUMB_CODE = b"\xb0\x83" # sub    sp, #0xc
+# memory address where emulation starts
+ADDRESS    = 0x10000
+
+
+# callback for tracing basic blocks
+def hook_block(uc, address, size, user_data):
+    print(">>> Tracing basic block at 0x%x, block size = 0x%x" %(address, size))
+
+
+# callback for tracing instructions
+def hook_code(uc, address, size, user_data):
+    print(">>> Tracing instruction at 0x%x, instruction size = 0x%x" %(address, size))
+
+
+# Test ARM
+def test_arm():
+    print("Emulate ARM code")
+    try:
+        # Initialize emulator in ARM mode
+        mu = Uc(UC_ARCH_ARM, UC_MODE_ARM | 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, 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)
+        mu.reg_write(UC_ARM_REG_APSR, 0xFFFFFFFF) #All application flags turned on
+   
+        # tracing all basic blocks with customized callback
+        mu.hook_add(UC_HOOK_BLOCK, hook_block)
+
+        # tracing one instruction at ADDRESS with customized callback
+        mu.hook_add(UC_HOOK_CODE, hook_code, begin=ADDRESS, end=ADDRESS)
+
+        # emulate machine code in infinite time
+        mu.emu_start(ADDRESS, ADDRESS + len(ARM_CODE))
+
+        # now print out some registers
+        print(">>> Emulation done. Below is the CPU context")
+
+        r0 = mu.reg_read(UC_ARM_REG_R0)
+        r1 = mu.reg_read(UC_ARM_REG_R1)
+        print(">>> R0 = 0x%x" %r0)
+        print(">>> R1 = 0x%x" %r1)
+
+    except UcError as e:
+        print("ERROR: %s" % e)
+
+
+def test_thumb():
+    print("Emulate THUMB code")
+    try:
+        # Initialize emulator in thumb mode
+        mu = Uc(UC_ARCH_ARM, UC_MODE_THUMB | 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, 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
+        # Note we start at ADDRESS | 1 to indicate THUMB mode.
+        mu.emu_start(ADDRESS | 1, ADDRESS + len(THUMB_CODE))
+
+        # now print out some registers
+        print(">>> Emulation done. Below is the CPU context")
+
+        sp = mu.reg_read(UC_ARM_REG_SP)
+        print(">>> SP = 0x%x" %sp)
+
+    except UcError as e:
+        print("ERROR: %s" % e)
+
+
+if __name__ == '__main__':
+    test_arm()
+    print("=" * 26)
+    test_thumb()