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First v1.18.8 change: preliminary support for 80386 debug registers

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This commit is contained in:
Jeff Parsons 2015-07-31 18:25:37 -07:00
commit 6003e948b6
145 changed files with 1099 additions and 947 deletions
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43
modules/pcjs/lib/x86op0f.js
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@ -401,7 +401,7 @@ X86.opMOVrd = function MOVrd()
return;
}
this.setReg(bModRM & 0x7, this.regDRn[iSrc]);
this.setReg(bModRM & 0x7, this.regDR[iSrc]);
this.nStepCycles -= 22;
@ -443,7 +443,6 @@ X86.opMOVcr = function MOVcr()
}
var bModRM = this.getIPByte();
var reg = this.getReg(bModRM & 0x7);
switch((bModRM & 0x38) >> 3) {
@ -499,14 +498,36 @@ X86.opMOVdr = function MOVdr()
X86.opUndefined.call(this);
return;
}
var regDR = this.getReg(bModRM & 0x7);
/*
* TODO: Do something with the Debug registers....
*/
this.regDRn[iDst] = this.getReg(bModRM & 0x7);
if (iDst == 7) {
var regDR7 = this.regDR[7];
if ((regDR ^ regDR7) & X86.DR7.ENABLE) {
/*
* We need to check changes to the Debug Control Register (DR7); specifically, if any of
* DR0-DR3 are transitioning from disabled to enabled, or vice versa, then we need to call
* addMemCheck(), or removeMemCheck(), as appropriate.
*/
var bitsEnabled = X86.DR7.L0 | X86.DR7.G0;
var bitsRWMask = 0x00030000;
for (var i = 0; i < 4; i++) {
var fEnabled = (regDR & bitsEnabled);
if (!fEnabled != !(regDR7 & bitsEnabled)) {
var bitsRW = (regDR & bitsRWMask) >> (i << 1);
var fWrite = !!(bitsRW & 0x00010000);
if (fEnabled) {
this.addMemCheck(this.regDR[i], fWrite);
} else {
this.removeMemCheck(this.regDR[i], fWrite);
}
}
bitsEnabled <<= 2;
bitsRWMask <<= 2;
}
}
}
this.regDR[iDst] = regDR;
this.nStepCycles -= (iDst < 4? 22 : 14);
/*
* TODO: Implement BACKTRACK for this instruction....
*/
@ -542,9 +563,7 @@ X86.opMOVrt = function MOVrt()
X86.opUndefined.call(this);
return;
}
this.setReg(bModRM & 0x7, this.regTRn[iSrc]);
this.setReg(bModRM & 0x7, this.regTR[iSrc]);
this.nStepCycles -= 12;
/*
@ -586,7 +605,7 @@ X86.opMOVtr = function MOVtr()
/*
* TODO: Do something with the Test registers....
*/
this.regTRn[iDst] = this.getReg(bModRM & 0x7);
this.regTR[iDst] = this.getReg(bModRM & 0x7);
this.nStepCycles -= 12;