Changeset 103514 in vbox for trunk/src/VBox

Timestamp:

Feb 22, 2024 3:50:58 AM (14 months ago)

Author:

vboxsync

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

161857

Message:

VMM/IEM: The vex3 & vex2 byte prefixes must set the IEM_OP_PRF_REX_R/X/B flags so IEM_GET_MODRM_EX will work correctly for vex instructions. bugref:10370

File:

• trunk/src/VBox/VMM/include/IEMInternal.h (modified) (2 diffs)

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

@@ -2136 +2136 @@
 
 #define IEM_OP_PRF_REX                  RT_BIT_32(24) /**< Any REX prefix (0x40-0x4f). */
-#define IEM_OP_PRF_REX_R                RT_BIT_32(25) /**< REX.R prefix (0x44,0x45,0x46,0x47,0x4c,0x4d,0x4e,0x4f). */
-#define IEM_OP_PRF_REX_B                RT_BIT_32(26) /**< REX.B prefix (0x41,0x43,0x45,0x47,0x49,0x4b,0x4d,0x4f). */
-#define IEM_OP_PRF_REX_X                RT_BIT_32(27) /**< REX.X prefix (0x42,0x43,0x46,0x47,0x4a,0x4b,0x4e,0x4f). */
+#define IEM_OP_PRF_REX_B                RT_BIT_32(25) /**< REX.B prefix (0x41,0x43,0x45,0x47,0x49,0x4b,0x4d,0x4f). */
+#define IEM_OP_PRF_REX_X                RT_BIT_32(26) /**< REX.X prefix (0x42,0x43,0x46,0x47,0x4a,0x4b,0x4e,0x4f). */
+#define IEM_OP_PRF_REX_R                RT_BIT_32(27) /**< REX.R prefix (0x44,0x45,0x46,0x47,0x4c,0x4d,0x4e,0x4f). */
 /** Mask with all the REX prefix flags.
  * This is generally for use when needing to undo the REX prefixes when they
@@ -4814 +4814 @@
 #define IEM_GET_MODRM_EX(a_pVCpu, a_bRm) \
     (  ((a_bRm) & ~X86_MODRM_REG_MASK) \
-     | (uint8_t)( (pVCpu->iem.s.fPrefixes & (IEM_OP_PRF_REX_B | IEM_OP_PRF_REX_X)) >> (26 - 3) ) )
-AssertCompile(IEM_OP_PRF_REX_B == RT_BIT_32(26));
-AssertCompile(IEM_OP_PRF_REX_X == RT_BIT_32(27));
+     | (uint8_t)( (pVCpu->iem.s.fPrefixes & (IEM_OP_PRF_REX_B | IEM_OP_PRF_REX_X)) >> (25 - 3) ) )
+AssertCompile(IEM_OP_PRF_REX_B == RT_BIT_32(25));
+AssertCompile(IEM_OP_PRF_REX_X == RT_BIT_32(26));
 
 /**