From 617e673e9bd6d4d4d6bc68924e8528a81cca6f7b Mon Sep 17 00:00:00 2001
From: Julian Seward <jseward@acm.org>
Date: Wed, 3 Oct 2018 15:26:48 +0200
Subject: [PATCH] x86 front end: handle UD2 as an officially recognised,
 unimplemented instruction, like the amd64 front end does.  n-i-bz.

This doesn't change anything downstream -- a SIGILL is still raised -- but
there's a bit less debug printing now.
---
 VEX/priv/guest_x86_toIR.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/VEX/priv/guest_x86_toIR.c b/VEX/priv/guest_x86_toIR.c
index ad1f8d8385..2e3b80303e 100644
--- a/VEX/priv/guest_x86_toIR.c
+++ b/VEX/priv/guest_x86_toIR.c
@@ -15408,6 +15408,15 @@ DisResult disInstr_X86_WRK (
          DIP("syscall\n");
          break;
 
+      /* =-=-=-=-=-=-=-=-=-=- UD2 =-=-=-=-=-=-=-=-=-=-=-= */
+
+      case 0x0B: /* UD2 */
+         stmt( IRStmt_Put( OFFB_EIP, mkU32(guest_EIP_curr_instr) ) );
+         jmp_lit(&dres, Ijk_NoDecode, guest_EIP_curr_instr);
+         vassert(dres.whatNext == Dis_StopHere);
+         DIP("ud2\n");
+         break;
+
       /* =-=-=-=-=-=-=-=-=- unimp2 =-=-=-=-=-=-=-=-=-=-= */
 
       default:
-- 
2.47.2