More PAGEBLOCKS support

2015-04-29 09:45:03 -07:00 · 2015-04-29 09:45:03 -07:00 · 453d84c6d8
commit 453d84c6d8
parent 6108fb25ab
7 changed files with 252 additions and 48 deletions
--- a/modules/pcjs/lib/x86op0f.js
+++ b/modules/pcjs/lib/x86op0f.js
@ -307,6 +307,11 @@ X86.opMOVcr = function MOVcr()
        break;
    case 0x3:
        this.regCR3 = this.regEBX;
+        /*
+         * Normal use of regCR3 involves adding a 0-4K (12-bit) offset to obtain a page directory entry, so
+         * let's ensure that the low 12 bits of regCR3 are always zero.
+         */
+        this.assert(!(this.regCR3 & X86.LADDR.OFFSET));
        this.regEBX = temp;
        break;
    }