From: "Lorenz (xha)" <me@xha.li>
Subject: add endbr64 instruction to as in amd64 base
To: tech@openbsd.org
Date: Thu, 11 Jan 2024 13:00:04 +0100

hi tech@,

can someone take a look at this and maby commit of OK? i didn't
include the endbr32 instruction because i think it will not be
needed on openbsd since running 32-bit binaries on amd64 is not
supported.

thanks.

Index: gnu/usr.bin/binutils-1.17/include/opcode/i386.h
===================================================================
RCS file: /cvs/src/gnu/usr.bin/binutils-2.17/include/opcode/i386.h,v
retrieving revision 1.11
diff -u -p -r1.11 i386.h
--- gnu/usr.bin/binutils-2.17/include/opcode/i386.h	9 Sep 2018 21:59:43 -0000	1.11
+++ gnu/usr.bin/binutils-2.17/include/opcode/i386.h	10 Jan 2024 12:15:36 -0000
@@ -1534,6 +1534,9 @@ static const template i386_optab[] =
 {"invpcid", 2, 0x660f3882, X, CpuNEW|CpuNo64, Modrm|IgnoreSize|No_bSuf|No_wSuf|No_sSuf|No_qSuf|No_xSuf|NoRex64, { BaseIndex|Disp8|Disp16|Disp32|Disp32S, Reg32 } },
 {"invpcid", 2, 0x660f3882, X, CpuNEW|Cpu64, Modrm|IgnoreSize|No_bSuf|No_wSuf|No_sSuf|No_qSuf|No_xSuf|NoRex64, { BaseIndex|Disp8|Disp16|Disp32|Disp32S, Reg64 } },
 
+/* Intel Indirect Branch Tracking extensions */
+{"endbr64", 0, 0xF30F1E, 0xFA, Cpu64, NoSuf|ImmExt, { 0, 0, 0 } },
+
 /* sentinel */
 {NULL, 0, 0, 0, 0, 0, { 0, 0, 0} }
 };