99 lines
2.5 KiB
C++
99 lines
2.5 KiB
C++
/*
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* Rockwell C39 processor module for IDA.
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* Copyright (c) 2000-2006 Konstantin Norvatoff, <konnor@bk.ru>
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* Freeware.
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*/
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#include "c39.hpp"
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//----------------------------------------------------------------------
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// use/change of operands
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void c39_t::handle_operand(
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const insn_t &insn,
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const op_t &x,
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bool is_forced,
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bool isload)
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{
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ea_t ea = map_code_ea(insn, x);
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switch ( x.type )
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{
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case o_void:
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break;
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// nothing to do here
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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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if ( !is_forced && is_off(get_flags(insn.ea), x.n) )
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insn.add_dref(ea, x.offb, dr_O); // offset!
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break;
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// jump or call
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case o_near:
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if ( has_insn_feature(insn.itype, CF_CALL) )
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{
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// add xref to code
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insn.add_cref(ea, x.offb, fl_CN);
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// is nonreturning function?
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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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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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// add xref to the target address
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if ( insn.itype == C39_jmp && x.dtype == dt_word && is_loaded(ea) )
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{
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ea_t callee = get_word(ea);
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if ( callee > 32 && is_mapped(callee) ) // is good address?
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{
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add_cref(insn.ea, callee, fl_JN);
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if ( !is_defarg0(get_flags(ea)) )
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op_plain_offset(ea, 0, 0);
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}
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}
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break;
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default:
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badTouch:
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warning("%a %s,%d: bad optype %d",
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insn.ea, insn.get_canon_mnem(ph),
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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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int c39_t::C39_emu(const insn_t &insn)
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{
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uint32 Feature = insn.get_canon_feature(ph);
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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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bool flag3 = is_forced_operand(insn.ea, 2);
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flow = ((Feature & CF_STOP) == 0);
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if ( Feature & CF_USE1) handle_operand(insn, insn.Op1, flag1, true);
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if ( Feature & CF_USE2) handle_operand(insn, insn.Op2, flag2, true);
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if ( Feature & CF_USE3) handle_operand(insn, insn.Op3, flag3, true);
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if ( Feature & CF_JUMP )
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remember_problem(PR_JUMP,insn.ea);
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if ( Feature & CF_CHG1) handle_operand(insn, insn.Op1, flag1, false);
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if ( Feature & CF_CHG2) handle_operand(insn, insn.Op2, flag2, false);
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if ( Feature & CF_CHG3) handle_operand(insn, insn.Op3, flag3, false);
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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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