def get_op(ea, op, stkvars=None):
'''ea_t -> int -> opt:{int : tinfo_t} -> op_ret'''
cmd = idautils.DecodeInstruction(ea)
cmd.Operands = get_operands(cmd) # for mips_op_hack
op = mips_op_hack(cmd, op)
opd = cmd[op]
if opd.type == idaapi.o_reg: # gpr, XXX sorta MIPS-specific
return op_ret(op_ty.reg, regs.gpr(opd.reg), 0)
elif opd.type == idaapi.o_idpspec1: # fpr, XXX sorta MIPS-specific
return op_ret(op_ty.reg, regs.fpr(opd.reg), 0)
elif opd.type in [idaapi.o_near, idaapi.o_mem]:
return op_ret(op_ty.name, idc.Name(opd.addr), 0)
elif idc.isStkvar1(idc.GetFlags(ea)):
# IDA seems to set this flag even for operands beyond the second,
# i.e. both of these are true for isStkvar1:
# .text:10003A84 sd $a1, 0x2E0+var_58($sp)
# .text:10003A68 addiu $a1, $sp, 0x2E0+var_2D8
try:
func = idaapi.get_func(ea)
off = idaapi.calc_stkvar_struc_offset(func, ea, op)
(name, ti) = stkvars[off]
return op_ret_for_ti(ti, name, off, off)
except KeyError:
raise OperandUnresolvableError('unable to get operand %u at %s' % (op, idc.atoa(ea)))
elif opd.type in [idaapi.o_imm, idaapi.o_displ]:
return cpu_ida.ida_current_cpu().data.get_op_addrmode(ea, op, cmd)
else:
raise OperandUnresolvableError('unable to get operand %u at %s' % (op, idc.atoa(ea)))
def get_op(ea, op, stkvars=None):
'''ea_t -> int -> opt:{int : tinfo_t} -> op_ret'''
cmd = idautils.DecodeInstruction(ea)
cmd.Operands = get_operands(cmd) # for mips_op_hack
op = mips_op_hack(cmd, op)
opd = cmd[op]
if opd.type == idaapi.o_reg: # gpr, XXX sorta MIPS-specific
return op_ret(op_ty.reg, regs.gpr(opd.reg), 0)
elif opd.type == idaapi.o_idpspec1: # fpr, XXX sorta MIPS-specific
return op_ret(op_ty.reg, regs.fpr(opd.reg), 0)
elif opd.type in [idaapi.o_near, idaapi.o_mem]:
return op_ret(op_ty.name, idc.Name(opd.addr), 0)
elif idc.isStkvar1(idc.GetFlags(ea)):
# IDA seems to set this flag even for operands beyond the second,
# i.e. both of these are true for isStkvar1:
# .text:10003A84 sd $a1, 0x2E0+var_58($sp)
# .text:10003A68 addiu $a1, $sp, 0x2E0+var_2D8
try:
func = idaapi.get_func(ea)
off = idaapi.calc_stkvar_struc_offset(func, ea, op)
(name, ti) = stkvars[off]
return op_ret_for_ti(ti, name, off, off)
except KeyError:
raise OperandUnresolvableError('unable to get operand %u at %s' %
(op, idc.atoa(ea)))
elif opd.type in [idaapi.o_imm, idaapi.o_displ]:
return cpu_ida.ida_current_cpu().data.get_op_addrmode(ea, op, cmd)
else:
raise OperandUnresolvableError('unable to get operand %u at %s' %
(op, idc.atoa(ea)))
def get_op_addrmode(ea, op, cmd):
'''ea_t -> int -> insn_t -> op_ret'''
# the ida module calls back into this module to deal with some MIPS-specific
# operand handling here
mnem = ida.get_mnem(ea)
op = ida.mips_op_hack(cmd, op)
if cmd[op].type == ida.o_imm:
val = cmd[op].value
elif cmd[op].type == ida.o_displ:
val = cmd[op].addr
else:
raise utils.BugError('neither imm nor displ passed to get_op_addrmode')
if mnem in insns.has_special_opnd:
target = val
return ida.resolve_opnd(target, val)
# addiu is often used for address calculation, which IDA will resolve to a
# name, so handle addiu's immval only if we fail to resolve it later
elif mnem != 'addiu' and mnem in insns.has_imm:
return ida.op_ret(ida.op_ty.value, immval(val), 0)
else:
target = ida.calc_target(ea, ea, op, immval(val))
if target == ida.BADADDR and cmd[op].type == ida.o_displ:
reg = cmd[op].reg
if reg >= 0 and reg <= 31:
reg = regs.gpr(reg)
elif reg >= 32 and reg <= 63:
reg = regs.fpr(reg)
else:
raise utils.BugError('bogus register %u' % reg)
return ida.op_ret(ida.op_ty.displ,
ida.displ(reg=reg,
displ=immval(val)),
0)
else:
opnd = ida.resolve_opnd(target, val)
if mnem == 'addiu' and opnd.ty == ida.op_ty.value:
# addiu is being used for regular addition; handle its third
# operand as an immediate value
return ida.op_ret(ida.op_ty.value, immval(opnd.val), 0)
else:
return opnd
def get_op_addrmode(ea, op, cmd):
"""ea_t -> int -> insn_t -> op_ret"""
# the ida module calls back into this module to deal with some MIPS-specific
# operand handling here
mnem = ida.get_mnem(ea)
op = ida.mips_op_hack(cmd, op)
if cmd[op].type == ida.o_imm:
val = cmd[op].value
elif cmd[op].type == ida.o_displ:
val = cmd[op].addr
else:
raise utils.BugError("neither imm nor displ passed to get_op_addrmode")
if mnem in insns.has_special_opnd:
target = val
return ida.resolve_opnd(target, val)
# addiu is often used for address calculation, which IDA will resolve to a
# name, so handle addiu's immval only if we fail to resolve it later
elif mnem != "addiu" and mnem in insns.has_imm:
return ida.op_ret(ida.op_ty.value, immval(val), 0)
else:
target = ida.calc_target(ea, ea, op, immval(val))
if target == ida.BADADDR and cmd[op].type == ida.o_displ:
reg = cmd[op].reg
if reg >= 0 and reg <= 31:
reg = regs.gpr(reg)
elif reg >= 32 and reg <= 63:
reg = regs.fpr(reg)
else:
raise utils.BugError("bogus register %u" % reg)
return ida.op_ret(ida.op_ty.displ, ida.displ(reg=reg, displ=immval(val)), 0)
else:
opnd = ida.resolve_opnd(target, val)
if mnem == "addiu" and opnd.ty == ida.op_ty.value:
# addiu is being used for regular addition; handle its third
# operand as an immediate value
return ida.op_ret(ida.op_ty.value, immval(opnd.val), 0)
else:
return opnd
