502 lines
15 KiB
C++
502 lines
15 KiB
C++
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#include "m7700.hpp"
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#include <segregs.hpp>
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int data_id;
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// 740 registers names
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static const char *const RegNames[] =
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{
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"A", // accumulator A
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"B", // accumulator B
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"X", // index register X
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"Y", // index register Y
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"S", // stack pointer
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"PC", // program counter
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"PG", // program bank register
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"DT", // data bank register
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"PS", // processor status register
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"DPR", // direct page register
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"fM", // data length flag
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"fX", // index register length flag
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"cs", "ds" // these 2 registers are required by the IDA kernel
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};
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static const char cfgname[] = "m7700.cfg";
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void m7700_iohandler_t::get_cfg_filename(char *buf, size_t bufsize)
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{
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qstrncpy(buf, cfgname, bufsize);
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}
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//--------------------------------------------------------------------------
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bool m7700_t::choose_device()
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{
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bool ok = choose_ioport_device(&ioh.device, cfgname);
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if ( !ok )
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ioh.device = NONEPROC;
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return ok;
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}
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//--------------------------------------------------------------------------
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const ioport_bit_t *m7700_t::find_bit(ea_t address, size_t bit)
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{
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return find_ioport_bit(ioh.ports, address, bit);
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}
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//--------------------------------------------------------------------------
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const char *m7700_t::set_idp_options(
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const char *keyword,
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int /*value_type*/,
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const void * /*value*/,
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bool /*idb_loaded*/)
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{
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if ( keyword != NULL )
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return IDPOPT_BADKEY;
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if ( !choose_ioport_device(&ioh.device, cfgname)
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&& ioh.device == NONEPROC )
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{
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warning("No devices are defined in the configuration file %s", cfgname);
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}
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else
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{
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if ( ioh.device != NONEPROC )
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ioh.set_device_name(ioh.device.c_str(), IORESP_ALL);
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}
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return IDPOPT_OK;
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}
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//--------------------------------------------------------------------------
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ssize_t idaapi idb_listener_t::on_event(ssize_t code, va_list va)
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{
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switch ( code )
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{
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case idb_event::sgr_changed:
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{
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ea_t ea1 = va_arg(va, ea_t);
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ea_t ea2 = va_arg(va, ea_t);
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int reg = va_arg(va, int);
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sel_t v = va_arg(va, sel_t);
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sel_t ov = va_arg(va, sel_t);
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if ( (reg == rfM || reg == rfX) && v != ov )
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set_sreg_at_next_code(ea1, ea2, reg, ov);
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}
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break;
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}
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return 0;
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}
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//--------------------------------------------------------------------------
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static const char *const m7700_help_message =
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"AUTOHIDE REGISTRY\n"
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"You have loaded a file for the Mitsubishi 7700 family processor.\n\n"\
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"This processor can be used in two different 'length modes' : 8-bit and 16-bit.\n"\
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"IDA allows to specify the encoding mode for every single instruction.\n"\
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"For this, IDA uses two virtual segment registers : \n"\
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" - fM, used to specify the data length;\n"\
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" - fX, used to specify the index register length.\n\n"\
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"Switching their state from 0 to 1 will switch the disassembly from 16-bit to 8-bit.\n"\
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"You can change their value using the 'change segment register value' command\n"\
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"(the canonical hotkey is Alt-G).\n\n"\
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"Note : in the real design, those registers are represented as flags in the\n"\
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"processor status register.\n";
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//----------------------------------------------------------------------
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void m7700_t::load_from_idb()
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{
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ioh.restore_device(IORESP_NONE);
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}
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//----------------------------------------------------------------------
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// This old-style callback only returns the processor module object.
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static ssize_t idaapi notify(void *, int msgid, va_list)
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{
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if ( msgid == processor_t::ev_get_procmod )
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return size_t(SET_MODULE_DATA(m7700_t));
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return 0;
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}
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ssize_t idaapi m7700_t::on_event(ssize_t msgid, va_list va)
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{
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int code = 0;
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switch ( msgid )
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{
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case processor_t::ev_init:
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hook_event_listener(HT_IDB, &idb_listener, &LPH);
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helper.create(PROCMOD_NODE_NAME);
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break;
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case processor_t::ev_term:
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clr_module_data(data_id);
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unhook_event_listener(HT_IDB, &idb_listener);
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break;
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case processor_t::ev_newfile:
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if ( choose_device() )
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ioh.set_device_name(ioh.device.c_str(), IORESP_ALL);
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else
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ioh.set_device_name(NONEPROC, IORESP_NONE);
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// Set the default segment register values :
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// -1 (badsel) for DR
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// 0 for fM and fX
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for ( segment_t *s=get_first_seg(); s != NULL; s=get_next_seg(s->start_ea) )
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{
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set_default_sreg_value(s, rDR, BADSEL);
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set_default_sreg_value(s, rfM, 0);
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set_default_sreg_value(s, rfX, 0);
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}
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info(m7700_help_message);
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break;
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case processor_t::ev_newprc:
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ptype = processor_subtype_t(va_arg(va, int));
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break;
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case processor_t::ev_ending_undo:
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// restore ptype
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ptype = processor_subtype_t(ph.get_proc_index());
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//fall through
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case processor_t::ev_oldfile:
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load_from_idb();
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break;
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case processor_t::ev_out_mnem:
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{
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outctx_t *ctx = va_arg(va, outctx_t *);
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out_mnem(*ctx);
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return 1;
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}
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case processor_t::ev_out_header:
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{
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outctx_t *ctx = va_arg(va, outctx_t *);
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m7700_header(*ctx);
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return 1;
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}
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case processor_t::ev_out_footer:
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{
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outctx_t *ctx = va_arg(va, outctx_t *);
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m7700_footer(*ctx);
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return 1;
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}
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case processor_t::ev_out_segstart:
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{
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outctx_t *ctx = va_arg(va, outctx_t *);
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segment_t *seg = va_arg(va, segment_t *);
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m7700_segstart(*ctx, seg);
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return 1;
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}
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case processor_t::ev_out_assumes:
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{
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outctx_t *ctx = va_arg(va, outctx_t *);
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m7700_assumes(*ctx);
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return 1;
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}
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case processor_t::ev_ana_insn:
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{
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insn_t *out = va_arg(va, insn_t *);
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return ana(out);
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}
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case processor_t::ev_emu_insn:
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{
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const insn_t *insn = va_arg(va, const insn_t *);
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return emu(*insn) ? 1 : -1;
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}
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case processor_t::ev_out_insn:
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{
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outctx_t *ctx = va_arg(va, outctx_t *);
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out_insn(*ctx);
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return 1;
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}
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case processor_t::ev_out_operand:
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{
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outctx_t *ctx = va_arg(va, outctx_t *);
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const op_t *op = va_arg(va, const op_t *);
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return out_opnd(*ctx, *op) ? 1 : -1;
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}
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case processor_t::ev_create_func_frame:
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{
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func_t *pfn = va_arg(va, func_t *);
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create_func_frame(pfn);
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return 1;
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}
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case processor_t::ev_get_frame_retsize:
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{
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int *frsize = va_arg(va, int *);
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const func_t *pfn = va_arg(va, const func_t *);
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*frsize = idp_get_frame_retsize(pfn);
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return 1;
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}
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case processor_t::ev_set_idp_options:
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{
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const char *keyword = va_arg(va, const char *);
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int value_type = va_arg(va, int);
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const char *value = va_arg(va, const char *);
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const char **errmsg = va_arg(va, const char **);
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bool idb_loaded = va_argi(va, bool);
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const char *ret = set_idp_options(keyword, value_type, value, idb_loaded);
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if ( ret == IDPOPT_OK )
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return 1;
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if ( errmsg != NULL )
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*errmsg = ret;
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return -1;
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}
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default:
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break;
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}
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return code;
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}
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static const asm_t as_asm =
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{
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AS_COLON
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|ASH_HEXF4 // hex $123 format
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|ASB_BINF3 // bin 0b010 format
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|ASO_OCTF5 // oct 123q format
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|AS_1TEXT, // 1 text per line, no bytes
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UAS_SEGM|UAS_INDX_NOSPACE,
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"Alfred Arnold's Macro Assembler",
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0,
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NULL, // no headers
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"ORG", // origin directive
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"END", // end directive
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";", // comment string
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'"', // string delimiter
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'\'', // char delimiter
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"\\\"'", // special symbols in char and string constants
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"DB", // ascii string directive
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"DB", // byte directive
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"DW", // word directive
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"DD", // dword (4 bytes)
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"DQ", // qword (8 bytes)
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NULL, // oword (16 bytes)
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NULL, // float (4 bytes)
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NULL, // double (8 bytes)
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"DT", // tbyte (10/12 bytes)
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NULL, // packed decimal real
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NULL, // arrays (#h,#d,#v,#s(...)
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"dfs %s", // uninited arrays
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"equ", // Equ
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NULL, // seg prefix
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"$", // current IP (instruction pointer) symbol in assembler
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NULL, // func_header
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NULL, // func_footer
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NULL, // public
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NULL, // weak
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NULL, // extrn
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NULL, // comm
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NULL, // get_type_name
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NULL, // align
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'(', ')', // lbrace, rbrace
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"%", // mod
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"&", // and
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"|", // or
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"^", // xor
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"!", // not
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"<<", // shl
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">>", // shr
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NULL, // sizeof
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0, // flag2 ???
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NULL, // comment close string
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NULL, // low8 op
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NULL, // high8 op
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NULL, // low16 op
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NULL // high16 op
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};
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//
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// Mitsubishi Macro Assembler for 7700 Family
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//
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//--------------------------------------------------------------------------
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// gets a function name
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//lint -e{818} could be declared const
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static bool mits_get_func_name(qstring *name, func_t *pfn)
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{
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ea_t ea = pfn->start_ea;
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if ( get_demangled_name(name, ea, inf_get_long_demnames(), DEMNAM_NAME) <= 0 )
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return false;
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tag_addr(name, ea, true);
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return true;
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}
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//--------------------------------------------------------------------------
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// prints function header
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static void idaapi mits_func_header(outctx_t &ctx, func_t *pfn)
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{
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ctx.gen_func_header(pfn);
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qstring name;
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if ( mits_get_func_name(&name, pfn) )
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{
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ctx.gen_printf(DEFAULT_INDENT, COLSTR(".FUNC %s", SCOLOR_ASMDIR), name.begin());
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ctx.gen_printf(0, COLSTR("%s:", SCOLOR_ASMDIR), name.begin());
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ctx.ctxflags |= CTXF_LABEL_OK;
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}
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}
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//--------------------------------------------------------------------------
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// prints function footer
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static void idaapi mits_func_footer(outctx_t &ctx, func_t *pfn)
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{
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qstring name;
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if ( mits_get_func_name(&name, pfn) )
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ctx.gen_printf(DEFAULT_INDENT, COLSTR(".ENDFUNC %s", SCOLOR_ASMDIR), name.begin());
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}
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static const asm_t mitsubishi_asm =
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{
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AS_COLON
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|ASH_HEXF0 // hex 123h format
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|ASB_BINF0 // bin 10100011b format
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|ASO_OCTF0 // oct 123o format
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|AS_1TEXT, // 1 text per line, no bytes
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UAS_END_WITHOUT_LABEL|UAS_DEVICE_DIR|UAS_BITMASK_LIST,
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"Mitsubishi Macro Assembler for 7700 Family",
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0,
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NULL, // no headers
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".ORG", // origin directive
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".END", // end directive
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";", // comment string
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'"', // string delimiter
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'\'', // char delimiter
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"\\\"'", // special symbols in char and string constants
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".BYTE", // ascii string directive
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".BYTE", // byte directive
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".WORD", // word directive
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".DWORD", // dword (4 bytes)
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NULL, // qword (8 bytes)
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NULL, // oword (16 bytes)
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NULL, // float (4 bytes)
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NULL, // double (8 bytes)
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NULL, // tbyte (10/12 bytes)
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NULL, // packed decimal real
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NULL, // arrays (#h,#d,#v,#s(...)
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".BLKB %s", // uninited arrays
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".EQU", // Equ
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NULL, // seg prefix
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"$", // current IP (instruction pointer) symbol in assembler
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mits_func_header, // func_header
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mits_func_footer, // func_footer
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".PUB", // public
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NULL, // weak
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NULL, // extrn
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NULL, // comm
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NULL, // get_type_name
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NULL, // align
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'(', ')', // lbrace, rbrace
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"%", // mod
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"&", // and
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"|", // or
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"^", // xor
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"!", // not
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"<<", // shl
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">>", // shr
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"SIZEOF", // sizeof
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0, // flag2 ???
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NULL, // comment close string
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NULL, // low8 op
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NULL, // high8 op
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NULL, // low16 op
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NULL // high16 op
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};
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// Supported assemblers
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static const asm_t *const asms[] = { &mitsubishi_asm, &as_asm, NULL };
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// Short and long name for our module
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#define FAMILY "Mitsubishi 16-BIT 7700 family:"
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static const char *const shnames[] =
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{
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"m7700",
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"m7750",
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NULL
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};
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static const char *const lnames[] =
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{
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FAMILY"Mitsubishi 16-BIT 7700 family",
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"Mitsubishi 16-BIT 7700 family (7750 series)",
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NULL
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};
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static const uchar retcode_1[] = { 0x40 }; // rti
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static const uchar retcode_2[] = { 0x60 }; // rts
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static const uchar retcode_3[] = { 0x6B }; // rtl
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static const bytes_t retcodes[] =
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{
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{ sizeof(retcode_1), retcode_1 },
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{ sizeof(retcode_2), retcode_2 },
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{ sizeof(retcode_3), retcode_3 },
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{ 0, NULL } // NULL terminated array
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};
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//-----------------------------------------------------------------------
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// Processor Definition
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//-----------------------------------------------------------------------
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processor_t LPH =
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{
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IDP_INTERFACE_VERSION, // version
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PLFM_M7700, // id
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// flag
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PR_RNAMESOK // can use register names for byte names
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| PR_BINMEM // The module creates RAM/ROM segments for binary files
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// (the kernel shouldn't ask the user about their sizes and addresses)
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| PR_SEGS // has segment registers?
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| PR_SGROTHER, // the segment registers don't contain
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// the segment selectors, something else
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// flag2
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PR2_IDP_OPTS, // the module has processor-specific configuration options
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8, // 8 bits in a byte for code segments
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8, // 8 bits in a byte for other segments
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shnames, // array of short processor names
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// the short names are used to specify the processor
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// with the -p command line switch)
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lnames, // array of long processor names
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// the long names are used to build the processor type
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// selection menu
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asms, // array of target assemblers
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notify, // the kernel event notification callback
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RegNames, // Regsiter names
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qnumber(RegNames), // Number of registers
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rDR, rVds,
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2, // size of a segment register
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rVcs, rVds,
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NULL, // No known code start sequences
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retcodes,
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0, m7700_last,
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Instructions, // instruc
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0, // int tbyte_size; -- doesn't exist
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{ 0, 7, 15, 0 }, // char real_width[4];
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// number of symbols after decimal point
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// 2byte float (0-does not exist)
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// normal float
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// normal double
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// long double
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m7700_rts, // Icode of return instruction. It is ok to give any of possible return instructions
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};
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