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Fixed high 8-bit register MOVs, restricted ACCESSED bit updates to SEGMENT descriptors, and prevented the Debugger from looping endlessly on bad instructions

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This commit is contained in:
Jeff Parsons 2015-08-20 22:42:27 -07:00
commit 2d7cbe2864
4 changed files with 33 additions and 28 deletions
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13
modules/pcjs/lib/debugger.js
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@ -1538,13 +1538,15 @@ if (DEBUGGER) {
*/
if (this.nSuppressBreaks && fProt || !this.segDebugger) return null;
}
var seg = this.segDebugger;
if (!fProt) {
this.segDebugger.loadReal(sel);
seg.loadReal(sel);
seg.limit = 0xffff; // although an ACTUAL real-mode segment load would not modify the limit,
seg.offMax = 0x10000; // proper segDebugger operation requires that we update the limit ourselves
} else {
this.segDebugger.loadProt(sel);
seg.loadProt(sel);
}
return this.segDebugger;
return seg;
};
/**
@ -2929,7 +2931,7 @@ if (DEBUGGER) {
if (!fRegs || this.nStep == 1)
this.doUnassemble();
else {
this.doRegisters(null);
this.doRegisters();
}
};
@ -3841,6 +3843,7 @@ if (DEBUGGER) {
if (dbgAddrIns.addr != X86.ADDR_INVALID && dbgAddr.addr != X86.ADDR_INVALID) {
do {
sBytes += str.toHex(this.getByte(dbgAddrIns, 1), 2);
if (dbgAddrIns.addr == null) break;
} while (dbgAddrIns.addr != dbgAddr.addr);
}