Changeset 73027 in vbox

Timestamp:

Jul 10, 2018 10:04:51 AM (7 years ago)

Author:

vboxsync

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

123579

Message:

VMM/IEM: Don't guru with VERR_IEM_INSTR_NOT_IMPLEMENTED for rdpmc instruction. Fake it like EM currently does.

File:

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

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

@@ -6196 +6196 @@
     }
 
-    /** @todo Implement RDPMC for the regular guest execution case (the above only
-     *        handles nested-guest intercepts). */
-    RT_NOREF(cbInstr);
-    return VERR_IEM_INSTR_NOT_IMPLEMENTED;
+    /** @todo Emulate performance counters, for now just return 0. */
+    pVCpu->cpum.GstCtx.rax = 0;
+    pVCpu->cpum.GstCtx.rdx = 0;
+    pVCpu->cpum.GstCtx.fExtrn &= ~(CPUMCTX_EXTRN_RAX | CPUMCTX_EXTRN_RDX);
+    /** @todo We should trigger a \#GP here if the CPU doesn't support the index in
+     *        ecx but see @bugref{3472}! */
+
+    iemRegAddToRipAndClearRF(pVCpu, cbInstr);
+    return VINF_SUCCESS;
 }