Changeset 96733 in vbox

Timestamp:

Sep 14, 2022 9:23:41 AM (2 years ago)

Author:

vboxsync

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

153620

Message:

VMM/IEM: fnsave modifies the FPU state, so actualize it for change rather than just read. bugref:9898

File:

• trunk/src/VBox/VMM/VMMAll/IEMAllInstructionsOneByte.cpp.h (modified) (1 diff)

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

@@ -9521 +9521 @@
     IEMOP_HLP_DONE_DECODING_NO_LOCK_PREFIX();
     IEM_MC_MAYBE_RAISE_DEVICE_NOT_AVAILABLE();
-    IEM_MC_ACTUALIZE_FPU_STATE_FOR_READ();
+    IEM_MC_ACTUALIZE_FPU_STATE_FOR_CHANGE(); /* Note! Implicit fninit after the save, do not use FOR_READ here! */
     IEM_MC_ASSIGN(iEffSeg, pVCpu->iem.s.iEffSeg);
     IEM_MC_CALL_CIMPL_3(iemCImpl_fnsave, enmEffOpSize, iEffSeg, GCPtrEffDst);