Changeset 103731 in vbox for trunk/src/VBox/VMM

Timestamp:

Mar 7, 2024 3:29:33 PM (12 months ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

162100

Message:

VMM/IEM: More fun with the three byte vex prefix. [@todo] bugref:10369

File:

• trunk/src/VBox/VMM/VMMAll/IEMAllInstOneByte.cpp.h (modified) (2 diffs)

trunk/src/VBox/VMM/VMMAll/IEMAllInstOneByte.cpp.h

@@ -8942 +8942 @@
                 pVCpu->iem.s.uRexB      = (~bRm >> (5 - 3)) & 0x8;
                 pVCpu->iem.s.uVex3rdReg = (~bVex2 >> 3) & 0xf;
-                pVCpu->iem.s.uVex3rdReg = (~bVex2 >> 3) & 0xf;
             }
             else
@@ -8949 +8948 @@
                 pVCpu->iem.s.uRexIndex  = 0;
                 pVCpu->iem.s.uRexB      = 0;
+                /** @todo testcase: Will attemps to access registers 8 thru 15 from 16&32 bit
+                 * code raise \#UD or just be ignored?  We're ignoring for now... */
                 pVCpu->iem.s.uVex3rdReg = (~bVex2 >> 3) & 0x7;
             }