339 lines
9.5 KiB
C++
339 lines
9.5 KiB
C++
/*
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* Interactive disassembler (IDA).
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* Copyright (c) 1990-2000 by Ilfak Guilfanov.
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* ALL RIGHTS RESERVED.
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* E-mail: ig@datarescue.com
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*
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*
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*/
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#include "st20.hpp"
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#include <diskio.hpp>
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int data_id;
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//--------------------------------------------------------------------------
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static const char *const register_names[] =
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{
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"Areg", // Evaluation stack register A
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"Breg", // Evaluation stack register B
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"Creg", // Evaluation stack register C
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"Iptr", // Instruction pointer register, pointing to the next instruction to be executed
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"Status", // Status register
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"Wptr", // Work space pointer, pointing to the stack of the currently executing process
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"Tdesc", // Task descriptor
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"IOreg", // Input and output register
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"cs", "ds",
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};
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//--------------------------------------------------------------------------
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static const uchar ret0[] = { 0x23, 0x22 }; // eret
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static const uchar ret1[] = { 0x24, 0xF5 }; // altend
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static const uchar ret2[] = { 0x20, 0xF3 }; // endp
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static const uchar ret3[] = { 0x61, 0xFF }; // iret
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static const uchar ret4[] = { 0x68, 0xFD }; // reboot
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static const uchar ret5[] = { 0x62, 0xFE }; // restart
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static const uchar ret6[] = { 0x22, 0xF0 }; // ret
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static const uchar ret7[] = { 0x60, 0xFB }; // tret
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static const bytes_t retcodes1[] =
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{
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{ qnumber(ret0), ret0, },
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{ 0, NULL }
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};
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static const bytes_t retcodes4[] =
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{
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{ qnumber(ret1), ret1, },
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{ qnumber(ret2), ret2, },
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{ qnumber(ret3), ret3, },
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{ qnumber(ret4), ret4, },
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{ qnumber(ret5), ret5, },
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{ qnumber(ret6), ret6, },
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{ qnumber(ret7), ret7, },
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{ 0, NULL }
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};
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//-----------------------------------------------------------------------
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// Hypthetical assembler
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//-----------------------------------------------------------------------
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static const asm_t hypasm =
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{
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ASH_HEXF0 // 1234h
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|ASD_DECF0 // 1234
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|ASB_BINF0 // 1010b
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|ASO_OCTF0 // 1234o
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|AS_COLON // create colons after data names
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|AS_ONEDUP, // one array definition per line
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0,
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"Hypthetical assembler",
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0,
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NULL, // header lines
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"org", // org
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"end", // end
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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", // double words
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"dq", // qwords
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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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"ds %s", // uninited arrays
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"equ", // equ
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NULL, // 'seg' prefix (example: push seg seg001)
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"$", // current IP (instruction pointer)
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NULL, // func_header
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NULL, // func_footer
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"public", // "public" name keyword
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NULL, // "weak" name keyword
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"extrn", // "extrn" name keyword
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// .extern directive requires an explicit object size
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NULL, // "comm" (communal variable)
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NULL, // get_type_name
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NULL, // "align" keyword
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'(', ')', // lbrace, rbrace
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"mod", // mod
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"&", // and
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"|", // or
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"^", // xor
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"not", // not
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"<<", // shl
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">>", // shr
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NULL, // sizeof
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};
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static const asm_t *const asms[] = { &hypasm, NULL };
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//--------------------------------------------------------------------------
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static const char cfgname[] = "st20.cfg";
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//--------------------------------------------------------------------------
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const char *st20_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.set_device_name(ioh.device.c_str(), IORESP_ALL);
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return IDPOPT_OK;
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}
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//----------------------------------------------------------------------
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void st20_t::load_from_idb()
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{
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ioh.restore_device();
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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(st20_t));
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return 0;
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}
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//--------------------------------------------------------------------------
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ssize_t idaapi st20_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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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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break;
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case processor_t::ev_ending_undo:
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procnum = ph.get_proc_index();
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if ( isc4() )
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ph.retcodes = retcodes4;
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//fall through
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case processor_t::ev_oldfile:
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if ( msgid == processor_t::ev_oldfile )
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ioh.upgrade_device_index(); // upgrade device index from 0 to -1
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load_from_idb();
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break;
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case processor_t::ev_newprc: // new processor type
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procnum = va_arg(va, int);
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// bool keep_cfg = va_argi(va, bool);
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if ( isc4() )
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ph.retcodes = retcodes4;
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break;
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case processor_t::ev_is_jump_func:
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{
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const func_t *pfn = va_arg(va, const func_t *);
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ea_t *jump_target = va_arg(va, ea_t *);
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return is_jump_func(pfn, jump_target);
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}
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case processor_t::ev_is_sane_insn:
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{
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const insn_t *insn = va_arg(va, insn_t *);
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int no_crefs = va_arg(va, int);
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return is_sane_insn(*insn, no_crefs) == 1 ? 1 : -1;
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}
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case processor_t::ev_may_be_func:
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{
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const insn_t *insn = va_arg(va, insn_t *);
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return may_be_func(*insn);
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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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st20_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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st20_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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st20_segstart(*ctx, seg);
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return 1;
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}
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case processor_t::ev_out_segend:
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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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st20_segend(*ctx, seg);
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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 st20_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 st20_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_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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case processor_t::ev_is_align_insn:
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{
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ea_t ea = va_arg(va, ea_t);
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return is_align_insn(ea);
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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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//-----------------------------------------------------------------------
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#define FAMILY "SGS-Thomson ST20:"
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static const char *const shnames[] = { "st20", "st20c4", NULL };
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static const char *const lnames[] =
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{
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FAMILY"SGS-Thomson ST20/C1",
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"SGS-Thomson ST20/C2-C4",
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NULL
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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_ST20, // id
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// flag
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PRN_HEX
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| PR_RNAMESOK,
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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,
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lnames,
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asms,
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notify,
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register_names, // Register names
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qnumber(register_names), // Number of registers
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cs, // first
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ds, // last
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2, // size of a segment register
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cs, ds,
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NULL, // No known code start sequences
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retcodes1,
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ST20_null,
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ST20_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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ST20_eret, // Icode of return instruction. It is ok to give any of possible return instructions
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};
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