walk_result DIGENTRY MIDisasmMemRefWalk( mad_disasm_data *dd, MI_MEMREF_WALKER *wk, const mad_registers *mr, void *d )
{
struct memref_glue glue;
glue.wk = wk;
glue.d = d;
return( DoDisasmMemRefWalk( dd, MemRefGlue, mr, &glue ) );
}
mad_trace_how DIGENTRY MITraceOne( mad_trace_data *td, mad_disasm_data *dd, mad_trace_kind tk, const mad_registers *mr, address *brk )
{
mad_trace_how th;
th = DoTraceOne( td, dd, tk, mr );
th = CheckSpecial( td, dd, mr, th );
switch( MCSystemConfig()->os ) {
case OS_OS2:
case OS_NW386:
case OS_QNX:
case OS_WINDOWS:
case OS_NT:
break;
default:
DoDisasmMemRefWalk( dd, TouchesScreenBuff, mr, (void *)mr );
break;
}
td->prev_ins_type = dd->ins.type;
td->prev_ins_flags.u.x86 = dd->ins.flags.u.x86;
switch( th ) {
case MTRH_BREAK:
switch( td->prev_ins_type ) {
case DI_X86_call:
case DI_X86_call2:
case DI_X86_call3:
case DI_X86_call4:
case DI_X86_int:
case DI_X86_into:
MCNotify( MNT_EXECUTE_LONG, NULL );
break;
default:
break;
}
/* fall through */
case MTRH_STEPBREAK:
*brk = td->brk;
break;
}
return( th );
}
mad_status DIGENTRY MIDisasmInsNext( mad_disasm_data *dd, const mad_registers *mr, address *next )
{
mad_disasm_control dc;
*next = GetRegIP( mr );
next->mach.offset += dd->ins.size;
dc = DisasmControl( dd, mr );
if( (dc & MDC_TAKEN_MASK) == MDC_TAKEN_NOT ) {
return( MS_OK );
}
switch( dc & MDC_TYPE_MASK ) {
case MDC_SYSCALL:
return( MS_FAIL );
case MDC_JUMP:
case MDC_CALL:
switch( dd->ins.op[ OP_1 ].type & DO_MASK ) {
case DO_ABSOLUTE:
next->mach.segment = dd->ins.op[ OP_1 ].extra;
/* fall through */
case DO_RELATIVE:
next->mach.offset = dd->ins.op[ OP_1 ].value;
break;
case DO_REG:
next->mach.offset = RegValue( mr, dd->ins.op[ OP_1 ].base );
break;
default:
/* memory indirect jump/call */
DoDisasmMemRefWalk( dd, FindCallTarget, mr, &DbgAddr );
if( dd->ins.flags.u.x86 & DIF_X86_OPND_LONG ) {
next->mach.offset = GetDataLong();
if( dd->ins.op[ OP_1 ].ref_type == DRT_X86_FARPTR48 ) {
next->mach.segment = (unsigned_16)GetDataWord();
}
} else {
next->mach.offset = (unsigned_16)GetDataWord();
if( dd->ins.op[ OP_1 ].ref_type == DRT_X86_FARPTR32 ) {
next->mach.segment = (unsigned_16)GetDataWord();
}
}
break;
}
break;
case MDC_SYSRET:
case MDC_RET:
DbgAddr = GetRegSP( mr );
if( dd->ins.flags.u.x86 & DIF_X86_OPND_LONG ) {
next->mach.offset = GetDataLong();
} else {
next->mach.offset = (unsigned_16)GetDataWord();
}
switch( dd->ins.type ) {
case DI_X86_retf:
case DI_X86_retf2:
next->mach.segment = (unsigned_16)GetDataWord();
break;
default:
break;
}
break;
}
return( MS_OK );
}
