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Fixed INT and RETF when stack switches occur

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Jeff Parsons 2014-11-26 16:34:54 -08:00 • committed by jeffpar
commit 38c2928882
7 changed files with 81 additions and 49 deletions
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14
modules/pcjs/lib/x86help.js
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@ -574,16 +574,22 @@ var X86Help = {
* Helper to push processor state, CS:IP, and optional error code onto the stack, and then jump
* to whatever CS:IP was fetched into descIDT by opHelpLoadIDT().
*
* For protected-mode, this function must attempt to load the new code segment first, because if the new segment
* requires a change in privilege level, the return address must be pushed on the NEW stack, not the current stack.
*
* @this {X86CPU}
* @param {number|null|undefined} nError
*/
opHelpPushPS: function(nError) {
this.pushWord(this.getPS());
var regPS = this.getPS();
var regCS = this.segCS.sel;
var regIP = this.regIP;
this.regPS &= this.descIDT.maskPS;
this.pushWord(this.segCS.sel);
this.pushWord(this.regIP);
this.setCSIP(this.descIDT.off, this.descIDT.sel, true);
this.pushWord(regPS);
this.pushWord(regCS);
this.pushWord(regIP);
if (nError != null) this.pushWord(nError);
this.setCSIP(this.descIDT.off, this.descIDT.sel);
this.nFault = -1;
},
/**