101 lines
2.5 KiB
C++
101 lines
2.5 KiB
C++
/*
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* National Semiconductor Corporation CR16 processor module for IDA.
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* Copyright (c) 2002-2006 Konstantin Norvatoff, <konnor@bk.ru>
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* Freeware.
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*/
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#include "cr16.hpp"
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//----------------------------------------------------------------------
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// handle using/changing of operands
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void cr16_t::handle_operand(const insn_t &insn, const op_t &x, bool is_forced, bool isload)
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{
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ea_t ea;
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switch ( x.type )
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{
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case o_void:
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case o_reg:
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break;
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case o_imm:
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if ( !isload )
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goto badTouch;
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set_immd(insn.ea);
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// no break
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case o_displ:
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if ( !is_forced && op_adds_xrefs(get_flags(insn.ea), x.n) )
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{
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int outf = (x.type == o_displ ? OOF_ADDR : 0)
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| OOF_SIGNED
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| (x.dtype == dt_word ? OOFW_16 : OOFW_8);
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dref_t dt = x.type == o_imm ? dr_O : isload ? dr_R : dr_W;
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ea = insn.add_off_drefs(x, dt, outf);
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if ( ea != BADADDR )
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insn.create_op_data(ea, x);
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}
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break;
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// jump or call
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case o_near:
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ea = map_code_ea(insn, x);
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if ( has_insn_feature(insn.itype, CF_CALL) )
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{
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// add cross-reference
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insn.add_cref(ea, x.offb, fl_CN);
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// doesn't return?
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flow = func_does_return(ea);
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}
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else
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{
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insn.add_cref(ea, x.offb, fl_JN);
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}
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break;
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// memory reference
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case o_mem:
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ea = map_data_ea(insn, x);
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insn.create_op_data(ea, x);
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insn.add_dref(ea, x.offb, isload ? dr_R : dr_W);
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break;
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// other - report error
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default:
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badTouch:
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warning("%a %s,%d: bad optype %d", insn.ea, insn.get_canon_mnem(ph), x.n, x.type);
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break;
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}
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}
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//----------------------------------------------------------------------
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// emulator
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int cr16_t::CR16_emu(const insn_t &insn)
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{
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uint32 Feature = insn.get_canon_feature(ph);
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// get operand types
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bool flag1 = is_forced_operand(insn.ea, 0);
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bool flag2 = is_forced_operand(insn.ea, 1);
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flow = ((Feature & CF_STOP) == 0);
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// handle reads
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if ( Feature & CF_USE1 )
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handle_operand(insn, insn.Op1, flag1, true);
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if ( Feature & CF_USE2 )
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handle_operand(insn, insn.Op2, flag2, true);
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if ( Feature & CF_JUMP )
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remember_problem(PR_JUMP, insn.ea);
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// handle writes
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if ( Feature & CF_CHG1 )
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handle_operand(insn, insn.Op1, flag1, false);
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if ( Feature & CF_CHG2 )
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handle_operand(insn, insn.Op2, flag2, false);
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// if not stopping, add flow xref
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if ( flow )
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add_cref(insn.ea, insn.ea + insn.size, fl_F);
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return 1;
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}
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