scummvm/engines/agi/op_dbg.cpp
Martin Kiewitz 9dd0cd51d5 AGI: Clean up VM opcode handling
so that invalid opcodes won't crash ScummVM anymore
2017-02-23 23:54:45 +01:00

107 lines
3.1 KiB
C++

/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include "agi/agi.h"
#include "agi/opcodes.h"
namespace Agi {
#define ip (_game.logics[lognum].cIP)
#define code (_game.logics[lognum].data)
const char *logicNamesIf[] = {
"OR", "NOT", "ELSE", "IF"
};
void AgiEngine::debugConsole(int lognum, int mode, const char *str) {
AgiOpCodeEntry *curOpCodeTable;
uint8 parametersLeft, z;
uint8 logicNameIdx;
const char *c;
if (str) {
debug(0, " %s", str);
return;
}
debugN(0, "%03d:%04x ", lognum, ip);
switch (*(code + ip)) {
case 0xFC:
case 0xFD:
case 0xFE:
case 0xFF:
if (_debug.opcodes) {
debugN(0, "%02X %02X %02X %02X %02X %02X %02X %02X %02X\n"
" ",
(uint8) * (code + (0 + ip)) & 0xFF,
(uint8) * (code + (1 + ip)) & 0xFF,
(uint8) * (code + (2 + ip)) & 0xFF,
(uint8) * (code + (3 + ip)) & 0xFF,
(uint8) * (code + (4 + ip)) & 0xFF,
(uint8) * (code + (5 + ip)) & 0xFF,
(uint8) * (code + (6 + ip)) & 0xFF,
(uint8) * (code + (7 + ip)) & 0xFF,
(uint8) * (code + (8 + ip)) & 0xFF);
}
logicNameIdx = (*(code + ip)) - 0xFC;
debugN(0, "%s ", logicNamesIf[logicNameIdx]);
break;
default:
curOpCodeTable = mode == lCOMMAND_MODE ? _opCodes : _opCodesCond;
parametersLeft = curOpCodeTable[*(code + ip)].parameterSize;
c = curOpCodeTable[*(code + ip)].parameters;
if (_debug.opcodes) {
debugN(0, "%02X %02X %02X %02X %02X %02X %02X %02X %02X\n"
" ",
(uint8) * (code + (0 + ip)) & 0xFF,
(uint8) * (code + (1 + ip)) & 0xFF,
(uint8) * (code + (2 + ip)) & 0xFF,
(uint8) * (code + (3 + ip)) & 0xFF,
(uint8) * (code + (4 + ip)) & 0xFF,
(uint8) * (code + (5 + ip)) & 0xFF,
(uint8) * (code + (6 + ip)) & 0xFF,
(uint8) * (code + (7 + ip)) & 0xFF,
(uint8) * (code + (8 + ip)) & 0xFF);
}
debugN(0, "%s ", (curOpCodeTable + * (code + ip))->name);
for (z = 1; parametersLeft > 0;) {
if (*c == 'n') {
debugN(0, "%d", *(code + (ip + z)));
} else {
debugN(0, "v%d[%d]", *(code + (ip + z)), getVar(*(code + (ip + z))));
}
c++;
z++;
if (--parametersLeft > 0)
debugN(0, ",");
}
break;
}
debugN(0, "\n");
}
} // End of namespace Agi