Changeset 104342 in vbox for trunk/src/VBox/VMM/VMMAll

Timestamp:

Apr 17, 2024 1:15:29 PM (10 months ago)

Author:

vboxsync

Message:

VMM/IEM: Fixed debug/strict regression from r162198 where x0/rax could be trashed by IEMNATIVE_STRICT_EFLAGS_SKIPPING_EMIT_CHECK in iemNativeEmitEpilog leading to weird return status codes and misbehaviour. bugref:10375

File:

• trunk/src/VBox/VMM/VMMAll/IEMAllN8veRecompiler.cpp (modified) (2 diffs)

trunk/src/VBox/VMM/VMMAll/IEMAllN8veRecompiler.cpp

@@ -6319 +6319 @@
      * Successful return, so clear the return register (eax, w0).
      */
-    off = iemNativeEmitGprZero(pReNative,off, IEMNATIVE_CALL_RET_GREG);
+    pReNative->Core.bmHstRegs |= RT_BIT_32(IEMNATIVE_CALL_RET_GREG); /* HACK: For IEMNATIVE_STRICT_EFLAGS_SKIPPING_EMIT_CHECK. */
+    off = iemNativeEmitGprZero(pReNative, off, IEMNATIVE_CALL_RET_GREG);
 
     /*
@@ -8255 +8256 @@
         ENTRY(iem.s.cbInstrBufTotal),
         ENTRY(iem.s.idxTbCurInstr),
+        ENTRY(iem.s.fSkippingEFlags),
 #ifdef VBOX_WITH_STATISTICS
         ENTRY(iem.s.StatNativeTlbHitsForFetch),