Changeset 104341 in vbox

Timestamp:

Apr 17, 2024 1:12:21 PM (10 months ago)

Author:

vboxsync

Message:

VMM/IEM: Improved iemNativeEmitMarker on arm64. bugref:10375

Location:

trunk

Files:

• include/iprt/armv8.h (modified) (1 diff)
• src/VBox/VMM/include/IEMN8veRecompilerEmit.h (modified) (1 diff)

trunk/include/iprt/armv8.h

@@ -2299 +2299 @@
  * @{ */
 
+/** A64: Official NOP instruction. */
+#define ARMV8_A64_INSTR_NOP         UINT32_C(0xd503201f)
 /** A64: Return instruction. */
 #define ARMV8_A64_INSTR_RET         UINT32_C(0xd65f03c0)

trunk/src/VBox/VMM/include/IEMN8veRecompilerEmit.h

@@ -68 +68 @@
     /* nop */
     uint32_t *pu32CodeBuf = iemNativeInstrBufEnsure(pReNative, off, 1);
-    pu32CodeBuf[off++] = 0xd503201f;
+    if (uInfo == 0)
+        pu32CodeBuf[off++] = ARMV8_A64_INSTR_NOP;
+    else
+        pu32CodeBuf[off++] = Armv8A64MkInstrMovZ(ARMV8_A64_REG_XZR, (uint16_t)uInfo);
 
     RT_NOREF(uInfo);