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Fixed WDEB386 fielding of V86-mode exceptions

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This commit is contained in:
Jeff Parsons 2015-10-20 19:23:45 -07:00
commit 7babb15868
3 changed files with 34 additions and 10 deletions
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16
modules/pcjs/lib/x86seg.js
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@ -887,6 +887,22 @@ X86Seg.prototype.loadDesc8 = function(addrDesc, sel, fProbe)
cpu.resetSizes();
if (regPS & X86.PS.VM) {
/*
* Frames coming from V86-mode ALWAYS contain 32-bit values, and look like this:
*
* low: EIP
* CS (padded to 32 bits)
* EFLAGS
* ESP
* SS (padded to 32 bits)
* ES (padded to 32 bits)
* DS (padded to 32 bits)
* FS (padded to 32 bits)
* high: GS (padded to 32 bits)
*
* Our caller (eg, fnINT()) will take care of pushing the final bits (EFLAGS, CS, and EIP).
*/
cpu.setDataSize(this.sizeFrame = 4);
cpu.assert(I386 && cpu.model >= X86.MODEL_80386);
cpu.pushWord(cpu.segGS.sel);
cpu.setGS(0);