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Implemented 80286 LOADALL

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Jeff Parsons 2014-11-01 17:12:20 -07:00 • committed by jeffpar
commit 5dce2a1a23
31 changed files with 1831 additions and 1765 deletions
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57
my_modules/pcjs-client/lib/x86op0f.js
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@ -48,10 +48,10 @@ var X86Op0F = {
opGRP6: function() {
var bModRM = this.getIPByte();
if ((bModRM & 0x38) < 0x10) { // possible reg values: 0x00, 0x08, 0x10, 0x18, 0x20, 0x28, 0x30, 0x38
if (FASTDISABLE) this.modEAWord = this.modEAWordDisabled; else this.opFlags |= X86.OPFLAG.NOREAD;
if (EAFUNCS) this.modEAWord = this.modEAWordDisabled; else this.opFlags |= X86.OPFLAG.NOREAD;
}
X86Mods.aOpModsGrpWord[bModRM].call(this, X86Op0F.aOpGRP6, X86Grps.opGrpNoSrc);
if (FASTDISABLE) { this.modEAWord = this.modEAWordEnabled; this.setEAWord = this.setEAWordEnabled; }
if (EAFUNCS) { this.modEAWord = this.modEAWordEnabled; this.setEAWord = this.setEAWordEnabled; }
},
/**
* @this {X86CPU}
@ -61,10 +61,10 @@ var X86Op0F = {
opGRP7: function() {
var bModRM = this.getIPByte();
if (!(bModRM & 0x10)) {
if (FASTDISABLE) this.modEAWord = this.modEAWordDisabled; else this.opFlags |= X86.OPFLAG.NOREAD;
if (EAFUNCS) this.modEAWord = this.modEAWordDisabled; else this.opFlags |= X86.OPFLAG.NOREAD;
}
X86Mods.aOpModsGrpWord[bModRM].call(this, X86Op0F.aOpGRP7, X86Grps.opGrpNoSrc);
if (FASTDISABLE) { this.modEAWord = this.modEAWordEnabled; this.setEAWord = this.setEAWordEnabled; }
if (EAFUNCS) { this.modEAWord = this.modEAWordEnabled; this.setEAWord = this.setEAWordEnabled; }
},
/**
* @this {X86CPU}
@ -124,6 +124,10 @@ var X86Op0F = {
* op=0x0F,0x05 (loadall)
*/
opLOADALL: function() {
if (this.segCS.cpl) {
X86Help.opHelpFault.call(this, X86.EXCEPTION.GP_FAULT, 0, true);
return;
}
X86Help.opHelpLMSW.call(this, this.getWord(0x806));
this.regDI = this.getWord(0x826);
this.regSI = this.getWord(0x828);
@ -133,26 +137,21 @@ var X86Op0F = {
this.regDX = this.getWord(0x830);
this.regCX = this.getWord(0x832);
this.regAX = this.getWord(0x834);
/*
* loadDesc() is an X86Seg class method that we must use to force the specified descriptor to be loaded;
* since the processor might still be in real-mode, we can't use normal segment register instance methods.
*/
X86Seg.loadDesc.call(this.segES, this.getWord(0x824), 0x836);
X86Seg.loadDesc.call(this.segCS, this.getWord(0x822), 0x83C);
X86Seg.loadDesc.call(this.segSS, this.getWord(0x820), 0x842);
X86Seg.loadDesc.call(this.segDS, this.getWord(0x81E), 0x848);
this.nCPL = this.segCS.level;
this.segES.loadDesc6(this.getWord(0x824), 0x836);
this.segCS.loadDesc6(this.getWord(0x822), 0x83C);
this.segSS.loadDesc6(this.getWord(0x820), 0x842);
this.segDS.loadDesc6(this.getWord(0x81E), 0x848);
this.setPS(this.getWord(0x818));
this.setIP(this.getWord(0x81A));
/*
* TODO: The bytes at 0x851 and 0x85D "should be zeroes", but do we rely on that, or should we load zeroes ourselves?
* TODO: The bytes at 0x851 and 0x85D "should be zeroes", but do we rely on that, or do we load zeros ourselves?
*/
this.addrGDT = this.getWord(0x84E) | (this.getWord(0x850) << 16);
this.addrGDTLimit = this.addrGDT + this.getWord(0x852);
this.segLDT.loadDesc(this.getWord(0x81C), 0x854);
this.segLDT.loadDesc6(this.getWord(0x81C), 0x854);
this.addrIDT = this.getWord(0x85A) | (this.getWord(0x85C) << 16);
this.addrIDTLimit = this.addrIDT + this.getWord(0x85E);
this.segTSS.loadDesc(this.getWord(0x816), 0x860);
this.segTSS.loadDesc6(this.getWord(0x816), 0x860);
this.nStepCycles -= 195;
},
/**
@ -182,7 +181,7 @@ var X86Op0F = {
* @return {number}
*/
opLLDT: function(dst, src) {
if (FASTDISABLE) this.setEAWord = this.setEAWordDisabled; else this.opFlags |= X86.OPFLAG.NOWRITE;
if (EAFUNCS) this.setEAWord = this.setEAWordDisabled; else this.opFlags |= X86.OPFLAG.NOWRITE;
this.segLDT.load(dst);
this.nStepCycles -= (17 + (this.regEA < 0? 0 : 2));
return dst;
@ -194,7 +193,7 @@ var X86Op0F = {
* @return {number}
*/
opLTR: function(dst, src) {
if (FASTDISABLE) this.setEAWord = this.setEAWordDisabled; else this.opFlags |= X86.OPFLAG.NOWRITE;
if (EAFUNCS) this.setEAWord = this.setEAWordDisabled; else this.opFlags |= X86.OPFLAG.NOWRITE;
this.segTSS.load(dst);
this.nStepCycles -= (17 + (this.regEA < 0? 0 : 2));
return dst;
@ -206,7 +205,7 @@ var X86Op0F = {
* @return {number}
*/
opVERR: function(dst, src) {
if (FASTDISABLE) this.setEAWord = this.setEAWordDisabled; else this.opFlags |= X86.OPFLAG.NOWRITE;
if (EAFUNCS) this.setEAWord = this.setEAWordDisabled; else this.opFlags |= X86.OPFLAG.NOWRITE;
/*
* Currently, segVER.load() will return an error only if the selector is beyond the bounds of the
* descriptor table or the descriptor is not for a segment.
@ -224,12 +223,9 @@ var X86Op0F = {
*
* Otherwise, DPL must be greater than or equal to (have less or the same privilege as) both the
* current privilege level and the selector's RPL.
*
* TODO: Consider making a CPL (current privilege level) variable that tracks segCS.sel, so that we
* don't have to mask segCS.sel every time.
*/
if ((this.segVER.acc & X86.DESC.ACC.TYPE.CODE_CONFORMING) == X86.DESC.ACC.TYPE.CODE_CONFORMING ||
this.segVER.level >= (this.segCS.sel & X86.SEL.LEVEL) && this.segVER.level >= (dst & X86.SEL.LEVEL)) {
if (this.segVER.dpl >= this.segCS.cpl && this.segVER.dpl >= (dst & X86.SEL.RPL) ||
(this.segVER.acc & X86.DESC.ACC.TYPE.CODE_CONFORMING_EXECONLY) == X86.DESC.ACC.TYPE.CODE_CONFORMING_EXECONLY) {
this.setZF();
return dst;
}
@ -245,7 +241,7 @@ var X86Op0F = {
* @return {number}
*/
opVERW: function(dst, src) {
if (FASTDISABLE) this.setEAWord = this.setEAWordDisabled; else this.opFlags |= X86.OPFLAG.NOWRITE;
if (EAFUNCS) this.setEAWord = this.setEAWordDisabled; else this.opFlags |= X86.OPFLAG.NOWRITE;
/*
* Currently, segVER.load() will return an error only if the selector is beyond the bounds of the
* descriptor table or the descriptor is not for a segment.
@ -259,11 +255,8 @@ var X86Op0F = {
/*
* DPL must be greater than or equal to (have less or the same privilege as) both the current
* privilege level and the selector's RPL.
*
* TODO: Consider making a CPL (current privilege level) variable that tracks segCS.sel, so that we
* don't have to mask segCS.sel every time.
*/
if (this.segVER.level >= (this.segCS.sel & X86.SEL.LEVEL) && this.segVER.level >= (dst & X86.SEL.LEVEL)) {
if (this.segVER.dpl >= this.segCS.cpl && this.segVER.dpl >= (dst & X86.SEL.RPL)) {
this.setZF();
return dst;
}
@ -371,7 +364,7 @@ var X86Op0F = {
} else {
this.addrGDT = this.getWord(this.regEA + 2) | (this.getByte(this.regEA + 4) << 16);
this.addrGDTLimit = this.addrGDT + dst;
if (FASTDISABLE) this.setEAWord = this.setEAWordDisabled; else this.opFlags |= X86.OPFLAG.NOWRITE;
if (EAFUNCS) this.setEAWord = this.setEAWordDisabled; else this.opFlags |= X86.OPFLAG.NOWRITE;
this.nStepCycles -= 11;
}
return dst;
@ -394,7 +387,7 @@ var X86Op0F = {
} else {
this.addrIDT = this.getWord(this.regEA + 2) | (this.getByte(this.regEA + 4) << 16);
this.addrIDTLimit = this.addrIDT + dst;
if (FASTDISABLE) this.setEAWord = this.setEAWordDisabled; else this.opFlags |= X86.OPFLAG.NOWRITE;
if (EAFUNCS) this.setEAWord = this.setEAWordDisabled; else this.opFlags |= X86.OPFLAG.NOWRITE;
this.nStepCycles -= 12;
}
return dst;
@ -418,7 +411,7 @@ var X86Op0F = {
opLMSW: function(dst, src) {
X86Help.opHelpLMSW.call(this, dst);
this.nStepCycles -= (this.regEA < 0? 3 : 6);
if (FASTDISABLE) this.setEAWord = this.setEAWordDisabled; else this.opFlags |= X86.OPFLAG.NOWRITE;
if (EAFUNCS) this.setEAWord = this.setEAWordDisabled; else this.opFlags |= X86.OPFLAG.NOWRITE;
return dst;
}
};