93 lines
2.8 KiB
C++
93 lines
2.8 KiB
C++
/*
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* Interactive disassembler (IDA).
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* Intel 80196 module
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*
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*/
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#include "i196.hpp"
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//----------------------------------------------------------------------
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void i196_t::handle_operand(const insn_t &insn, const op_t &x, int isload)
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{
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switch ( x.type )
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{
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case o_imm:
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set_immd(insn.ea);
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if ( op_adds_xrefs(get_flags(insn.ea), x.n) )
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insn.add_off_drefs(x, dr_O, OOF_SIGNED);
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break;
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case o_indexed: // addr[value]
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set_immd(insn.ea);
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if ( x.value == 0 && !is_defarg(get_flags(insn.ea), x.n) )
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op_plain_offset(insn.ea, x.n, to_ea(insn.cs, 0));
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if ( op_adds_xrefs(get_flags(insn.ea), x.n) ) // xref to addr
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{
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insn_t tmp = insn;
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tmp.ops[x.n].value = x.addr;
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tmp.add_off_drefs(tmp.ops[x.n], x.value ? dr_O : isload ? dr_R : dr_W, OOF_SIGNED|OOF_ADDR);
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}
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if ( x.value != 0 ) // xref to value
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{ // no references to ZERO_REG
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ea_t ea = to_ea(insn.cs, x.value);
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insn.add_dref(ea, x.offb, isload ? dr_R : dr_W);
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insn.create_op_data(ea, x);
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}
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break;
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case o_indirect:
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case o_indirect_inc:
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case o_mem:
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{
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ea_t dea = to_ea(insn.cs, x.addr);
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insn.create_op_data(dea, x);
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insn.add_dref(dea, x.offb, isload ? dr_R : dr_W);
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if ( !isload && (x.addr == 0x14 || x.addr == 0x15) )
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{
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sel_t wsrval = BADSEL;
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if ( insn.Op2.type == o_imm )
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wsrval = sel_t(insn.Op2.value);
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split_sreg_range(insn.ea, x.addr == 0x14 ? WSR : WSR1, wsrval, SR_auto);
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}
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}
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break;
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case o_near:
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ea_t ea = to_ea(insn.cs, x.addr);
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int iscall = has_insn_feature(insn.itype, CF_CALL);
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insn.add_cref(ea, x.offb, iscall ? fl_CN : fl_JN);
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if ( flow && iscall )
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flow = func_does_return(ea);
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}
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}
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//----------------------------------------------------------------------
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int i196_t::emu(const insn_t &insn)
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{
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uint32 Feature = insn.get_canon_feature(ph);
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flow = ((Feature & CF_STOP) == 0);
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if ( Feature & CF_USE1 ) handle_operand(insn, insn.Op1, 1);
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if ( Feature & CF_USE2 ) handle_operand(insn, insn.Op2, 1);
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if ( Feature & CF_USE3 ) handle_operand(insn, insn.Op3, 1);
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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, 0);
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if ( Feature & CF_CHG2 ) handle_operand(insn, insn.Op2, 0);
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if ( Feature & CF_CHG3 ) handle_operand(insn, insn.Op3, 0);
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switch ( insn.itype )
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{
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case I196_popa:
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split_sreg_range(insn.ea, WSR, BADSEL, SR_auto);
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split_sreg_range(insn.ea, WSR1, BADSEL, SR_auto);
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break;
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}
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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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