void make_vector(ea_t addr, char *name)
{
doDwrd(addr, 4);
create_insn(get_long(addr));
add_func(get_long(addr), BADADDR);
add_cref(addr, get_long(addr), fl_CF);
if (name != NULL)
set_name(addr, name);
}
//---------------------------------------------------------------------------
static void idaapi ch_enter(void *obj, uint32 n)
{
x86seh_ctx_t *ctx = (x86seh_ctx_t *)obj;
if ( --n < ctx->handlers.size() )
{
ea_t ea = ctx->handlers[n];
if ( !isCode(get_flags_novalue(ea)) )
create_insn(ea);
jumpto(ea);
}
}
//---------------------------------------------------------------------------
// The main function - called when the user selects the menu item
static bool idaapi callback(void *)
{
// Calculate the default values to display in the form
ea_t screen_ea = get_screen_ea();
segment_t *s = getseg(screen_ea);
if ( s == NULL || !isCode(get_flags_novalue(screen_ea)) )
{
warning("AUTOHIDE NONE\nThe cursor must be on the table jump instruction");
return false;
}
ea_t startea = screen_ea;
while ( true )
{
ea_t prev = prev_not_tail(startea);
if ( !is_switch_insn(prev) )
break;
startea = prev;
}
ea_t jumps = get_first_dref_from(screen_ea);
uval_t jelsize = s->abytes();
uval_t jtsize = 0;
if ( jumps != BADADDR )
{
decode_insn(screen_ea);
jtsize = guess_table_size(jumps);
}
uval_t shift = 0;
uval_t elbase = 0;
char input[MAXSTR];
input[0] = '\0';
ea_t defea = BADADDR;
uval_t lowcase = 0;
ushort jflags = 0;
ushort vflags = 0;
ea_t vtable = BADADDR;
ea_t vtsize = 0;
ea_t velsize = s->abytes();
reg_info_t ri;
ri.size = 0;
// If switch information is present in the database, use it for defaults
switch_info_ex_t si;
if ( get_switch_info_ex(screen_ea, &si, sizeof(si)) > 0 )
{
jumps = si.jumps;
jtsize = si.ncases;
startea = si.startea;
elbase = si.elbase;
jelsize = si.get_jtable_element_size();
shift = si.get_shift();
defea = (si.flags & SWI_DEFAULT) ? si.defjump : BADADDR;
if ( si.regnum != -1 )
get_reg_name(si.regnum, get_dtyp_size(si.regdtyp), input, sizeof(input));
if ( si.flags & SWI_SIGNED )
jflags |= 2;
if ( si.flags2 & SWI2_SUBTRACT )
jflags |= 4;
if ( si.flags & SWI_SPARSE )
{
jflags |= 1;
vtable = si.values;
vtsize = jtsize;
velsize = si.get_vtable_element_size();
if ( si.flags2 & SWI2_INDIRECT )
{
vflags |= 1;
jtsize = si.jcases;
}
if ( si.flags & SWI_JMP_INV )
vflags |= 2;
}
else
{
lowcase = si.lowcase;
}
}
// Now display the form and let the user edit the attributes
while ( AskUsingForm_c(main_form, &jumps, &jtsize, &jelsize, &shift, &elbase,
&startea, input, &lowcase, &defea, &jflags) )
{
if ( !check_table(jumps, jelsize, jtsize) )
continue;
if ( shift > 3 )
{
warning("AUTOHIDE NONE\nInvalid shift value (allowed values are 0..3)");
continue;
}
if ( !isCode(get_flags_novalue(startea)) )
{
warning("AUTOHIDE NONE\nInvalid switch idiom start %a (must be an instruction", startea);
continue;
}
ri.reg = -1;
if ( input[0] != '\0' && !parse_reg_name(input, &ri) )
{
warning("AUTOHIDE NONE\nUnknown input register: %s", input);
continue;
}
if ( defea != BADADDR && !isCode(get_flags_novalue(defea)) )
{
warning("AUTOHIDE NONE\nInvalid default jump %a (must be an instruction", defea);
continue;
}
if ( jflags & 1 ) // value table is present
{
bool vok = false;
while ( AskUsingForm_c(value_form, &vflags, &vtable, &vtsize, &velsize) )
{
if ( (vflags & 1) == 0 )
vtsize = jtsize;
if ( check_table(vtable, velsize, vtsize) )
{
vok = true;
break;
}
}
if ( !vok )
break;
}
// ok, got and validated all params -- fill the structure
si.flags = SWI_EXTENDED;
si.flags2 = 0;
if ( jflags & 2 )
si.flags |= SWI_SIGNED;
if ( jflags & 4 )
si.flags2 |= SWI2_SUBTRACT;
si.jumps = jumps;
si.ncases = ushort(jtsize);
si.startea = startea;
si.elbase = elbase;
if ( elbase != 0 )
si.flags |= SWI_ELBASE;
si.set_jtable_element_size((int)jelsize);
si.set_shift((int)shift);
if ( defea != BADADDR )
{
si.flags |= SWI_DEFAULT;
si.defjump = defea;
}
if ( ri.reg != -1 )
si.set_expr(ri.reg, get_dtyp_by_size(ri.size));
if ( jflags & 1 ) // value table is present
{
si.flags |= SWI_SPARSE;
si.values = vtable;
si.set_vtable_element_size((int)velsize);
if ( (vflags & 1) != 0 )
{
si.flags2 |= SWI2_INDIRECT;
si.jcases = (int)jtsize;
si.ncases = (ushort)vtsize;
}
if ( (vflags & 2) != 0 )
si.flags |= SWI_JMP_INV;
}
else
{
si.lowcase = lowcase;
}
// ready, store it
set_switch_info_ex(screen_ea, &si);
create_switch_table(screen_ea, &si);
setFlbits(screen_ea, FF_JUMP);
create_insn(screen_ea);
info("AUTOHIDE REGISTRY\nSwitch information has been stored");
break;
}
return true;
}
int idaapi emu()
{
char szLabel[MAXSTR];
insn_t saved;
segment_t* pSegment;
ea_t ea, length, offset;
flags_t flags;
uint32 dwFeature, i;
dwFeature = cmd.get_canon_feature();
fFlow = !(dwFeature & CF_STOP);
if (dwFeature & CF_USE1) op_emu(cmd.Op1, 1);
if (dwFeature & CF_USE2) op_emu(cmd.Op2, 1);
if (dwFeature & CF_CHG1) op_emu(cmd.Op1, 0);
if (dwFeature & CF_CHG2) op_emu(cmd.Op2, 0);
saved = cmd;
switch (cmd.itype)
{
case M8B_MOV:
if (!cmd.Op1.is_reg(rPSP))
break;
case M8B_SWAP:
if (cmd.itype == M8B_SWAP && !cmd.Op2.is_reg(rDSP))
break;
for (i = 0; i < 5; ++i)
{
ea = decode_prev_insn(cmd.ea);
if (ea == BADADDR) break;
if (cmd.itype == M8B_MOV && cmd.Op1.is_reg(rA) && cmd.Op2.type == o_imm)
{
ea = toRAM(cmd.Op2.value);
if (ea != BADADDR)
{
qsnprintf(szLabel, sizeof(szLabel), "%s_%0.2X", cmd.itype == M8B_MOV ? "psp" : "dsp", cmd.Op2.value);
ua_add_dref(cmd.Op2.offb, ea, dr_O);
set_name(ea, szLabel, SN_NOWARN);
}
break;
}
}
break;
case M8B_JACC:
pSegment = getseg(cmd.ea);
if (!pSegment) break;
length = pSegment->endEA - cmd.ea;
if (length > 256) length = 256;
for (offset = 2; offset < length; offset += 2)
{
ea = toROM(saved.Op1.addr + offset);
if (ea == BADADDR) break;
flags = getFlags(ea);
if (!hasValue(flags) || (has_any_name(flags) || hasRef(flags)) || !create_insn(ea)) break;
switch (cmd.itype)
{
case M8B_JMP:
case M8B_RET:
case M8B_RETI:
case M8B_IPRET:
add_cref(saved.ea, ea, fl_JN);
break;
default:
offset = length;
}
}
break;
case M8B_IORD:
case M8B_IOWR:
case M8B_IOWX:
for (i = 0; i < 5; ++i)
{
ea = (saved.itype == M8B_IORD) ? decode_insn(cmd.ea + cmd.size) : decode_prev_insn(cmd.ea);
if (ea == BADADDR) break;
if (cmd.Op1.is_reg(rA) && cmd.Op2.type == o_imm)
{
qsnprintf(szLabel, sizeof(szLabel), "[A=%0.2Xh] ", cmd.Op2.value);
if (get_portbits_sym(szLabel + qstrlen(szLabel), saved.Op1.addr, cmd.Op2.value))
set_cmt(saved.ea, szLabel, false);
break;
}
}
}
cmd = saved;
if ((cmd.ea & 0xFF) == 0xFF)
{
switch (cmd.itype)
{
case M8B_RET:
case M8B_RETI:
case M8B_XPAGE:
break;
default:
QueueMark(Q_noValid, cmd.ea);
}
}
if (fFlow) ua_add_cref(0, cmd.ea + cmd.size, fl_F);
return 1;
}
