Retro/pcjs
Watch
1
0
Fork
You've already forked pcjs
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Unified call/int/trap gate handling a bit

Browse source
This commit is contained in:
Jeff Parsons 2014-12-02 12:14:52 -08:00 • committed by jeffpar
commit a14d22c806
2 changed files with 57 additions and 75 deletions
Download patch file Download diff file Expand all files Collapse all files

7
modules/pcjs/lib/x86help.js
View file

@ -494,8 +494,9 @@ var X86Help = {
/**
* opHelpINT(nIDT, nError, nCycles)
*
* NOTE: We no longer use setCSIP(), because it always loads the new CS using the segCS.load() method,
* which only knows how to load GDT and LDT selectors, whereas interrupt instructions must use setCS.loadIDT().
* NOTE: We no longer use setCSIP(), because it always loads the new CS using segCS.load(), which
* only knows how to load GDT and LDT descriptors, whereas interrupts must use setCS.loadIDT(), which
* deals exclusively with IDT descriptors.
*
* This means we must take care to replicate critical features of setCSIP(); eg, setting segCS.fCall before
* calling loadIDT(), updating EIP, and flushing the prefetch queue.
@ -663,7 +664,7 @@ var X86Help = {
* and so whenever we see that opcode, we ignore the caller's fHalt flag, and suppress FAULT messages
* unless CPU messages are also enabled.
*
* When a triple fault shows up, nFault is -1; it displays as "ff" only because we truncate it to a byte.
* When a triple fault shows up, nFault is -1; it displays as "ff" because we display nFault as a byte.
*/
if (bOpcode == X86.OPCODE.INT3) {
fHalt = false;