Changeset 100804 in vbox for trunk/include/VBox

Timestamp:

Aug 5, 2023 1:01:32 AM (18 months ago)

Author:

vboxsync

Message:

VMM/IEM: Made the rep-prefixed string instructions return new status code VINF_IEM_YIELD_PENDING_FF if they yield and does not update RIP. This will avoid trouble in the recompiler as any non-zero status code will stop TB execution. This is more efficient than generating extra checks on the RIP value or something in the TB. The IEM_CIMPL_F_REP annotated instructions no longer need to trigger an end-of-tb. Annotate I/O instructions in case it comes in handy. bugref:10369

File:

• trunk/include/VBox/err.h (modified) (1 diff)

trunk/include/VBox/err.h

@@ -2499 +2499 @@
  *  VERR, VERW).  This is not used outside the instruction implementations. */
 #define VINF_IEM_SELECTOR_NOT_OK                    (5305)
-/** Recompiler: Translation block allocation failed. */
-#define VERR_IEM_TB_ALLOC_FAILED                    (-5309)
+/** Returns by rep-prefixed string instruction if they yield because of
+ *  pending FFs.  The status code is internal to IEM. */
+#define VINF_IEM_YIELD_PENDING_FF                   (5306)
 /** Recompiled execution: Break out of current TB execution. */
 #define VINF_IEM_REEXEC_BREAK                       (5310)
 /** Recompilation: End translation block. */
 #define VINF_IEM_RECOMPILE_END_TB                   (5311)
+/** Recompiler: Translation block allocation failed. */
+#define VERR_IEM_TB_ALLOC_FAILED                    (-5312)
 
 /** Restart the current instruction. For testing only. */