From 551a0986d696a51420305131c7be76243b3b6e22 Mon Sep 17 00:00:00 2001
From: radare <pancake@nopcode.org>
Date: Tue, 14 Jan 2020 14:36:45 +0100
Subject: [PATCH] 'push rip' is not a valid instruction ##asm (#15804)

---
 libr/asm/p/asm_x86_nz.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libr/asm/p/asm_x86_nz.c b/libr/asm/p/asm_x86_nz.c
index 211c8c24a1..3e223771a5 100644
--- a/libr/asm/p/asm_x86_nz.c
+++ b/libr/asm/p/asm_x86_nz.c
@@ -2364,6 +2364,10 @@ static int oppush(RAsm *a, ut8 *data, const Opcode *op) {
 				data[l++] = 0x41;
 			}
 			ut8 base = 0x50;
+			if (op->operands[0].reg == X86R_RIP) {
+				eprintf ("Invalid register\n");
+				return -1;
+			}
 			data[l++] = base + op->operands[0].reg;
 		}
 	} else if (op->operands[0].type & OT_MEMORY) {