add regress for #155

tests/regress/mips_single_step_sp.py

@@ -0,0 +1,39 @@
+from unicorn import *
+from unicorn.mips_const import *
+
+def code_hook(uc, addr, size, user_data):
+    print 'code hook: pc=%08x sp=%08x' % (addr, uc.reg_read(UC_MIPS_REG_SP))
+
+def run(step=False):
+    addr = 0x4010dc
+
+    code = (
+        'f8ff0124' # addiu $at, $zero, -8
+        '24e8a103' # and $sp, $sp, $at
+        '09f82003' # jalr $t9
+        'e8ffbd23' # addi $sp, $sp, -0x18
+        'b8ffbd27' # addiu $sp, $sp, -0x48
+        '00000000' # nop
+    ).decode('hex')
+
+    uc = Uc(UC_ARCH_MIPS, UC_MODE_MIPS32 + UC_MODE_LITTLE_ENDIAN)
+    if step:
+        uc.hook_add(UC_HOOK_CODE, code_hook)
+
+    uc.reg_write(UC_MIPS_REG_SP, 0x60800000)
+    uc.reg_write(UC_MIPS_REG_T9, addr + len(code) - 8)
+
+    print 'sp =', hex(uc.reg_read(UC_MIPS_REG_SP))
+    print 'at =', hex(uc.reg_read(UC_MIPS_REG_AT))
+    print '<run> (single step: %s)' % (str(step))
+
+    uc.mem_map(addr & ~(0x1000 - 1), 0x2000)
+    uc.mem_write(addr, code)
+    uc.emu_start(addr, addr + len(code))
+
+    print 'sp =', hex(uc.reg_read(UC_MIPS_REG_SP))
+    print 'at =', hex(uc.reg_read(UC_MIPS_REG_AT))
+    print
+
+run(step=False)
+run(step=True)